/* =========================================================
   NeedACheat — App Dashboard Styles
   ========================================================= */

.app-main { padding: calc(var(--navbar-h) + 1.5rem) 0 3rem; min-height: 100vh; }

/* ---------- Tabs ---------- */
.tabs-wrap {
  display: flex; justify-content: center; margin-bottom: 2rem;
}
.tabs {
  display: inline-flex;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 4px;
  gap: 2px;
  position: relative;
  max-width: 100%;
  overflow-x: auto;
  scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }
.tab {
  padding: 0.65rem 1.1rem;
  border-radius: 10px;
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.25s var(--ease), background-color 0.25s var(--ease);
  white-space: nowrap;
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-sans);
}
.tab:hover { color: var(--text-primary); }
.tab.is-active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 16px var(--accent-glow);
}

/* ---------- Tool panels ---------- */
.tool-panel { display: none; animation: fadeInUp 0.5s var(--ease-out) both; }
.tool-panel.is-active { display: block; }

.tool-grid {
  display: grid; gap: 1.5rem;
  grid-template-columns: minmax(0, 420px) minmax(0, 1fr);
}
@media (max-width: 1000px) { .tool-grid { grid-template-columns: 1fr; } }

.panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  backdrop-filter: blur(18px);
}
.panel__header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.25rem; }
.panel__title { font-family: var(--font-serif); font-size: 1.45rem; font-weight: 400; }
.panel__meta { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted); letter-spacing: 0.06em; text-transform: uppercase; }

.field-stack { display: flex; flex-direction: column; gap: 1rem; }

/* Slider */
.slider {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 4px;
  background: var(--border-hover);
  border-radius: 999px;
  outline: none;
}
.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 0 0 4px var(--accent-glow);
  transition: transform 0.15s var(--ease);
}
.slider::-webkit-slider-thumb:hover { transform: scale(1.15); }
.slider::-moz-range-thumb {
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--accent); border: none; cursor: pointer;
  box-shadow: 0 0 0 4px var(--accent-glow);
}
.slider-row { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-muted); margin-top: 0.4rem; letter-spacing: 0.06em; }

/* Chip group */
.chip-group { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.chip {
  padding: 0.55rem 0.85rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: all 0.2s var(--ease);
  display: inline-flex; align-items: center; gap: 0.3rem;
}
.chip:hover { color: var(--text-primary); border-color: var(--accent); }
.chip.is-active { background: var(--accent-glow); border-color: var(--accent); color: var(--text-primary); }

/* Output area */
.output {
  min-height: 420px;
  padding: 1.75rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}
.output-bar {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 1rem; gap: 0.6rem; flex-wrap: wrap;
}
.output-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }

/* Skeleton loader */
.skeleton { display: flex; flex-direction: column; gap: 0.9rem; }
.skeleton-bar {
  height: 14px; border-radius: 6px;
  background: linear-gradient(90deg, var(--bg-card) 0%, var(--bg-card-hover) 50%, var(--bg-card) 100%);
  background-size: 200% 100%;
  animation: skeletonShine 1.6s ease-in-out infinite;
}
.skeleton-bar.w-60 { width: 60%; }
.skeleton-bar.w-80 { width: 80%; }
.skeleton-bar.w-40 { width: 40%; }
.skeleton-bar.tall { height: 22px; width: 45%; }

/* Output states */
.ai-message {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.85rem;
  padding: 1.5rem;
  background:
    radial-gradient(circle at top right, rgba(124, 109, 255, 0.16), transparent 35%),
    var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.ai-message__badge {
  width: fit-content;
  padding: 0.35rem 0.55rem;
  border-radius: 999px;
  background: rgba(124, 109, 255, 0.14);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.ai-message h4 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--text-primary);
}
.ai-message p {
  max-width: 40ch;
  color: var(--text-secondary);
  line-height: 1.65;
}
.ai-message--error {
  background:
    radial-gradient(circle at top right, rgba(255, 145, 77, 0.14), transparent 38%),
    var(--bg-primary);
}
.ai-message--error .ai-message__badge {
  background: rgba(255, 145, 77, 0.14);
  color: var(--warning);
}

/* Fake cheat sheet render */
.cheat-sheet {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.92rem;
  line-height: 1.6;
}
.cheat-sheet h4 { font-family: var(--font-serif); font-size: 1.3rem; font-weight: 400; margin-bottom: 0.5rem; color: var(--accent); }
.cheat-sheet h5 { font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--accent-2); margin: 1.1rem 0 0.4rem; font-weight: 500; }
.cheat-sheet ul { padding-left: 1.1rem; list-style: disc; color: var(--text-secondary); }
.cheat-sheet ul li { margin-bottom: 0.3rem; }
.cheat-sheet .fx { color: var(--accent-3); font-family: var(--font-mono); font-size: 0.88rem; }
.cheat-sheet-cols { columns: 2; column-gap: 1.75rem; }
@media (max-width: 700px) { .cheat-sheet-cols { columns: 1; } }

.ai-cheat-sheet {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.cheat-sheet__hero {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.cheat-sheet__overview {
  margin-top: 0.55rem;
  max-width: 58ch;
  color: var(--text-secondary);
}
.cheat-sheet__meta {
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
  align-content: flex-start;
}
.cheat-sheet__meta span {
  padding: 0.38rem 0.6rem;
  border-radius: 999px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}
.cheat-sheet__highlights {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
@media (max-width: 760px) {
  .cheat-sheet__highlights {
    grid-template-columns: 1fr;
  }
}
.cheat-highlight {
  padding: 1rem 1.05rem;
  background: linear-gradient(180deg, rgba(124, 109, 255, 0.11), transparent), var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 16px;
}
.cheat-highlight--warm {
  background: linear-gradient(180deg, rgba(255, 145, 77, 0.12), transparent), var(--bg-secondary);
}
.cheat-highlight h5 {
  margin-top: 0;
}
.cheat-highlight ul {
  margin-top: 0.65rem;
}
.cheat-sheet__grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
@media (max-width: 820px) {
  .cheat-sheet__grid {
    grid-template-columns: 1fr;
  }
}
.cheat-block {
  padding: 1rem 1.05rem 1.05rem;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.015), transparent), var(--bg-secondary);
}
.cheat-block:nth-child(4n + 1) .cheat-block__title { color: var(--accent); }
.cheat-block:nth-child(4n + 2) .cheat-block__title { color: var(--accent-2); }
.cheat-block:nth-child(4n + 3) .cheat-block__title { color: var(--accent-3); }
.cheat-block:nth-child(4n + 4) .cheat-block__title { color: var(--warning); }
.cheat-block__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 400;
}
.cheat-block__summary {
  margin-bottom: 0.75rem;
  color: var(--text-secondary);
}
.cheat-block__list {
  padding-left: 1.1rem;
  color: var(--text-secondary);
}
.cheat-block__list li + li {
  margin-top: 0.35rem;
}

/* Handwrite output (in app) */
.hw-surface {
  min-height: 420px;
  padding: 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  color: #222;
  font-family: var(--font-hand);
  font-size: 1.55rem;
  line-height: 36px;
  position: relative;
  overflow: hidden;
  transition: background 0.25s var(--ease);
  background: #fffef7;
}
.hw-surface[data-paper="lined"] {
  background-image: repeating-linear-gradient(to bottom, transparent 0 35px, rgba(120,130,200,0.28) 35px 36px);
}
.hw-surface[data-paper="grid"] {
  background-image:
    repeating-linear-gradient(to bottom, transparent 0 35px, rgba(120,130,200,0.22) 35px 36px),
    repeating-linear-gradient(to right, transparent 0 35px, rgba(120,130,200,0.22) 35px 36px);
}
.hw-surface[data-paper="plain"] { background-image: none; }
.hw-surface[data-ink="blue"]   { color: #1a3a6b; }
.hw-surface[data-ink="black"]  { color: #1a1a1a; }
.hw-surface[data-ink="pencil"] { color: #555566; }
.hw-surface[data-ink="red"]    { color: #a82b2b; }
.hw-surface[data-size="sm"]    { font-size: 1.2rem; line-height: 30px; }
.hw-surface[data-size="md"]    { font-size: 1.55rem; line-height: 36px; }
.hw-surface[data-size="lg"]    { font-size: 1.9rem; line-height: 44px; }
.hw-surface .hand-line { display: block; transform: rotate(var(--r,0deg)); }
.hw-surface::before {
  content: ""; position: absolute; left: 56px; top: 0; bottom: 0; width: 1px;
  background: rgba(255,100,100,0.3);
  opacity: 0;
  transition: opacity 0.3s var(--ease);
}
.hw-surface[data-paper="lined"]::before { opacity: 1; }
.hw-surface .empty { color: #aaa; font-family: var(--font-sans); font-size: 0.95rem; text-align: center; margin-top: 3rem; }

.handwrite-right-panel { display: flex; flex-direction: column; min-height: 0; }
.handwrite-stage {
  flex: 1;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  overflow: hidden;
  background: #525659;
  border-radius: 12px;
  padding: 24px 0;
  position: relative;
}
.handwrite-canvas-wrapper {
  width: 794px;
  height: 1123px;
  position: relative;
  flex-shrink: 0;
  transform-origin: top center;
  box-shadow: 0 4px 32px rgba(0,0,0,0.5);
}
.handwrite-canvas-wrapper canvas {
  position: absolute;
  inset: 0;
  width: 794px;
  height: 1123px;
  display: block;
}
.handwrite-canvas-wrapper #handwriteCanvas { border-radius: 2px; }
.handwrite-canvas-wrapper #handwriteOverlay { z-index: 2; cursor: crosshair; }

/* Mode bar */
.hw-mode-bar { display: flex; align-items: center; gap: 0.4rem; margin-bottom: 0.75rem; flex-wrap: wrap; }
.hw-mode-btn { padding: 0.3rem 0.75rem; border-radius: 7px; border: 1.5px solid var(--border); background: var(--bg-card); color: var(--text-secondary); font-size: 0.78rem; font-weight: 500; cursor: pointer; transition: border-color 0.15s, background 0.15s, color 0.15s; letter-spacing: 0.03em; }
.hw-mode-btn:hover { border-color: #7c6dff; color: #7c6dff; }
.hw-mode-btn.is-active { background: #7c6dff; border-color: #7c6dff; color: #fff; }
.hw-mode-hint { font-size: 0.7rem; color: var(--text-muted); margin-left: 0.25rem; }

/* Shape bar */
.hw-shape-bar { display: flex; align-items: center; gap: 0.4rem; margin-bottom: 0.75rem; flex-wrap: wrap; padding: 0.45rem 0.65rem; border-radius: 10px; background: rgba(124, 109, 255, 0.06); border: 1px dashed rgba(124, 109, 255, 0.25); }
.hw-shape-label { font-size: 0.7rem; font-family: var(--font-mono); color: var(--text-muted); letter-spacing: 0.08em; text-transform: uppercase; margin-right: 0.25rem; }
.hw-shape-btn { padding: 0.3rem 0.7rem; border-radius: 7px; border: 1.5px solid var(--border); background: var(--bg-card); color: var(--text-secondary); font-size: 0.78rem; font-weight: 500; cursor: pointer; transition: border-color 0.15s, background 0.15s, color 0.15s, transform 0.1s; letter-spacing: 0.03em; }
.hw-shape-btn:hover { border-color: #7c6dff; color: #7c6dff; transform: translateY(-1px); }
.hw-shape-btn.is-active { background: #7c6dff; border-color: #7c6dff; color: #fff; box-shadow: 0 4px 12px rgba(124,109,255,0.35); }

/* Shape props panel — share base .hw-props styling */
.hw-shape-props { border-color: rgba(124, 109, 255, 0.35); background: linear-gradient(180deg, rgba(124,109,255,0.05), var(--bg-card)); }
.hw-props__field--check { flex-direction: row; align-items: center; gap: 0.5rem; padding-top: 1.1rem; }
.hw-props__field--check input[type="checkbox"] { width: 16px; height: 16px; accent-color: #7c6dff; cursor: pointer; }

/* Zoom badge */
.hw-zoom-badge { position: absolute; top: 8px; right: 10px; z-index: 10; background: rgba(0,0,0,0.55); color: #fff; border: none; border-radius: 6px; font-size: 0.72rem; padding: 3px 8px; cursor: pointer; font-family: var(--font-mono); letter-spacing: 0.04em; transition: background 0.15s; }
.hw-zoom-badge:hover { background: rgba(124,109,255,0.8); }
.hw-pan-hint { position: absolute; top: 10px; right: 82px; font-size: 0.65rem; color: rgba(255,255,255,0.38); font-family: var(--font-mono); pointer-events: none; letter-spacing: 0.03em; }

/* Props panel */
.hw-props { margin-top: 0.85rem; padding: 0.85rem 1rem; border-radius: 12px; border: 1px solid var(--border); background: var(--bg-card); display: flex; flex-direction: column; gap: 0.7rem; }
.hw-props__row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.65rem; }
.hw-props__row:last-of-type { grid-template-columns: 1fr 1fr 1fr; }
.hw-props__field { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.78rem; color: var(--text-secondary); }
.hw-props__field em { color: var(--accent); font-style: normal; font-variant-numeric: tabular-nums; }
.hw-props__field input[type="color"] { width: 100%; height: 32px; padding: 0; border: 1.5px solid var(--border); border-radius: 6px; background: var(--bg-card); cursor: pointer; }
.hw-props__field select { padding: 0.4rem 0.5rem; border-radius: 6px; border: 1.5px solid var(--border); background: var(--bg-card); color: var(--text-primary); font-size: 0.85rem; }
.hw-props__num { width: 100%; padding: 0.35rem 0.5rem; border-radius: 6px; border: 1.5px solid var(--border); background: var(--bg-card); color: var(--text-primary); font-size: 0.85rem; font-variant-numeric: tabular-nums; }
.hw-props__num:focus { outline: none; border-color: #7c6dff; }
.hw-props__buttons { display: flex; flex-wrap: wrap; gap: 0.5rem; }
@media (max-width: 720px) { .hw-props__row { grid-template-columns: 1fr 1fr; } }
/* Photo card */
.hw-photo-card { border: 1px solid var(--border); border-radius: 14px; overflow: hidden; margin-bottom: 16px; background: var(--bg-card); }

/* STATE 1 — drop zone */
.hw-drop-zone { padding: 28px 20px; text-align: center; cursor: pointer; border-radius: 13px; transition: background 0.2s, border-color 0.2s; }
.hw-drop-zone:hover,
.hw-drop-zone.drag-over { background: var(--accent-glow); border-color: var(--accent); }
.hw-drop-icon { font-size: 28px; display: block; margin-bottom: 8px; }
.hw-drop-label { font-size: 13px; color: var(--text-secondary); margin: 0 0 4px; }
.hw-drop-link { color: var(--accent); cursor: pointer; text-decoration: none; }
.hw-drop-link:hover { color: var(--accent-hover); }
.hw-drop-sub { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; margin: 0; }

/* STATE 2 — photo loaded */
.hw-photo-preview-row { display: flex; align-items: center; gap: 12px; padding: 14px 16px 10px; border-bottom: 1px solid var(--border); }
.hw-photo-thumb { width: 56px; height: 56px; object-fit: cover; border-radius: 8px; border: 1px solid var(--border); flex-shrink: 0; }
.hw-photo-preview-info { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.hw-photo-success { font-size: 12px; color: var(--success); font-family: var(--font-mono, monospace); letter-spacing: 0.03em; }
.hw-photo-filename { font-size: 13px; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 160px; }
.hw-remove-link { font-size: 11px; color: var(--text-muted); margin-top: 2px; text-align: left; background: none; border: none; cursor: pointer; padding: 0; }
.hw-remove-link:hover { color: var(--accent-2); }

/* Action buttons row */
.hw-photo-action-row { display: flex; }
.hw-action-btn { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; padding: 14px 16px; border: none; cursor: pointer; transition: background 0.18s; text-align: left; flex: 1; }
.hw-action-primary { background: var(--accent-glow); }
.hw-action-primary:hover { background: color-mix(in srgb, var(--accent) 20%, transparent); }
.hw-action-secondary { background: transparent; }
.hw-action-secondary:hover { background: var(--bg-card-hover, rgba(255,255,255,0.04)); }
.hw-action-icon { font-size: 18px; }
.hw-action-label { font-size: 13px; font-weight: 600; color: var(--text-primary); line-height: 1.2; }
.hw-action-primary .hw-action-label { color: var(--accent); }
.hw-action-sub { font-size: 11px; color: var(--text-muted); line-height: 1.2; }

.hw-style-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.45rem; }
.hw-style-btn { padding: 0.48rem 0.7rem; border-radius: 8px; border: 1.5px solid var(--border); background: var(--bg-card); color: var(--text-secondary); font-size: 0.8rem; cursor: pointer; transition: border-color 0.15s var(--ease), color 0.15s var(--ease); text-align: left; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.hw-style-btn:hover { border-color: var(--border-hover); color: var(--text-primary); }
.hw-style-btn.is-active { border-color: var(--accent); color: var(--accent); font-weight: 500; }
.hw-pressure-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.toggle-switch { position: relative; display: inline-block; width: 44px; height: 24px; flex-shrink: 0; }
.toggle-switch input { opacity: 0; width: 0; height: 0; position: absolute; }
.toggle-switch__track { position: absolute; inset: 0; border-radius: 12px; background: var(--border-hover); cursor: pointer; transition: background 0.2s var(--ease); }
.toggle-switch__track::before { content: ""; position: absolute; width: 18px; height: 18px; border-radius: 50%; background: #fff; left: 3px; top: 3px; transition: transform 0.2s var(--ease); box-shadow: 0 1px 3px rgba(0,0,0,0.3); }
.toggle-switch input:checked + .toggle-switch__track { background: var(--accent); }
.toggle-switch input:checked + .toggle-switch__track::before { transform: translateX(20px); }

.hw-template-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 0.4rem; }
.hw-template-btn { display: flex; flex-direction: column; align-items: stretch; gap: 0.35rem; padding: 0.4rem; border-radius: 8px; border: 1.5px solid var(--border); background: var(--bg-card); color: var(--text-secondary); cursor: pointer; transition: border-color 0.15s var(--ease), color 0.15s var(--ease); }
.hw-template-btn:hover { border-color: var(--border-hover); color: var(--text-primary); }
.hw-template-btn.is-active { border-color: var(--accent); color: var(--accent); }
.hw-template-name { font-size: 0.72rem; text-align: center; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.hw-template-thumb { display: block; height: 40px; border-radius: 4px; background: #fefefe; position: relative; overflow: hidden; }
.hw-template-thumb--russian { background-image:
  linear-gradient(to right, transparent 0, transparent 13px, #ff8888 13px, #ff8888 14px, transparent 14px),
  repeating-linear-gradient(to right, #a8c4e0 0 0.5px, transparent 0.5px 6px),
  repeating-linear-gradient(to bottom, #a8c4e0 0 0.5px, transparent 0.5px 6px);
  background-color: #fefefe; }
.hw-template-thumb--lined { background-image:
  linear-gradient(to right, transparent 0, transparent 13px, #ff8888 13px, #ff8888 14px, transparent 14px),
  repeating-linear-gradient(to bottom, transparent 0 7px, #b0c4de 7px 7.7px);
  background-color: #fefefe; }
.hw-template-thumb--graph { background-image:
  repeating-linear-gradient(to right, #c8d8e8 0 0.5px, transparent 0.5px 5px),
  repeating-linear-gradient(to bottom, #c8d8e8 0 0.5px, transparent 0.5px 5px);
  background-color: #fefefe; }
.hw-template-thumb--dot { background-image: radial-gradient(#aabbcc 0.6px, transparent 1px);
  background-size: 6px 6px; background-color: #fefefe; }
.hw-template-thumb--legal { background-color: #fffde7;
  background-image:
    linear-gradient(to right, transparent 0, transparent 11px, #ff8888 11px 12px, transparent 12px 14px, #ff8888 14px 15px, transparent 15px),
    repeating-linear-gradient(to bottom, transparent 0 7px, #aac8aa 7px 7.7px); }
.hw-template-thumb--plain { background: #fffef9; box-shadow: inset 0 0 0 1px rgba(0,0,0,0.05); }

.hw-customize { border: 1px solid var(--border); border-radius: 12px; padding: 0.5rem 0.85rem 0.65rem; background: var(--bg-card); }
.hw-customize summary { cursor: pointer; font-size: 0.85rem; color: var(--text-secondary); padding: 0.25rem 0; user-select: none; }
.hw-customize summary:hover { color: var(--text-primary); }
.hw-customize[open] summary { color: var(--accent); margin-bottom: 0.4rem; }
.hw-customize > .field { margin-top: 0.55rem; }

.hw-color-row { display: flex; align-items: center; gap: 0.4rem; flex-wrap: wrap; }
.hw-color-swatch { width: 26px; height: 26px; border-radius: 50%; border: 2px solid var(--border); background: var(--swatch, #fff); cursor: pointer; padding: 0; flex-shrink: 0; transition: border-color 0.15s var(--ease), transform 0.15s var(--ease); }
.hw-color-swatch:hover { border-color: var(--border-hover); transform: scale(1.06); }
.hw-color-swatch.is-active { border-color: var(--accent); }
.hw-color-input { width: 36px; height: 28px; padding: 0; border: 1.5px solid var(--border); border-radius: 6px; background: var(--bg-card); cursor: pointer; }
.hw-color-input--full { width: 100%; height: 32px; }

/* Visual notes output */
.visual-out { display: grid; gap: 1rem; grid-template-columns: repeat(2, 1fr); }
@media (max-width: 720px) { .visual-out { grid-template-columns: 1fr; } }
.visual-card {
  padding: 1.25rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-primary);
  position: relative;
  overflow: visible;
}
.visual-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--theme-color, var(--accent));
}
.visual-card h5 { font-family: var(--font-serif); font-size: 1.15rem; margin-bottom: 0.4rem; color: var(--theme-color, var(--accent)); font-weight: 400; }
.visual-card p { font-size: 0.88rem; color: var(--text-secondary); }
.vc-1 { --theme-color: var(--accent); }
.vc-2 { --theme-color: var(--accent-2); }
.vc-3 { --theme-color: var(--accent-3); }
.vc-4 { --theme-color: var(--warning); }

.visual-summary {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.visual-summary__hero {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: flex-end;
}
.visual-summary__hero h4 {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 400;
  color: var(--text-primary);
}
.visual-summary__eyebrow {
  margin-bottom: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-2);
}
.visual-summary__overview {
  max-width: 34ch;
  color: var(--text-secondary);
}
.ai-visual-card {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}
.visual-card__icon {
  font-size: 1.5rem;
  line-height: 1;
}
.visual-card__list {
  padding-left: 1rem;
  color: var(--text-secondary);
}
.visual-card__list li + li {
  margin-top: 0.3rem;
}
.visual-summary__takeaway {
  padding: 0.95rem 1rem;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: linear-gradient(135deg, rgba(124, 109, 255, 0.08), rgba(79, 209, 197, 0.08));
  color: var(--text-primary);
}

.vn-layout-summary {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}
.vn-layout-comparison {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}
.vn-layout-timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.vn-layout-timeline .vn-card {
  width: 100%;
  position: relative;
  border-left: 4px solid var(--theme-color, var(--accent));
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
}
.vn-layout-timeline .vn-card + .vn-card { margin-top: 1rem; }
.vn-layout-timeline .vn-card:not(:last-child)::after {
  content: "";
  position: absolute;
  left: -3px;
  top: 100%;
  width: 2px;
  height: 1rem;
  background: var(--theme-color, var(--accent));
}
.vn-layout-mindmap {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto;
  gap: 1rem;
}
.vn-layout-mindmap .vn-card:first-child {
  grid-column: 1 / -1;
}

.vn-theme-purple .vc-1,
.vn-theme-purple .vc-2,
.vn-theme-purple .vc-3,
.vn-theme-purple .vc-4 {
  --card-accent: #7c6dff;
  --theme-color: #7c6dff;
}
.vn-theme-pink .vc-1,
.vn-theme-pink .vc-2,
.vn-theme-pink .vc-3,
.vn-theme-pink .vc-4 {
  --card-accent: #f472b6;
  --theme-color: #f472b6;
}
.vn-theme-teal .vc-1,
.vn-theme-teal .vc-2,
.vn-theme-teal .vc-3,
.vn-theme-teal .vc-4 {
  --card-accent: #4fd1c5;
  --theme-color: #4fd1c5;
}
.vn-theme-yellow .vc-1,
.vn-theme-yellow .vc-2,
.vn-theme-yellow .vc-3,
.vn-theme-yellow .vc-4 {
  --card-accent: #f6c453;
  --theme-color: #f6c453;
}

/* Generate button with loading state */
.btn-generate { position: relative; overflow: hidden; }
.btn-generate.is-loading { pointer-events: none; color: transparent; }
.btn-generate.is-loading::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, transparent 30%, rgba(255,255,255,0.3) 50%, transparent 70%);
  background-size: 200% 100%;
  animation: skeletonShine 1.2s linear infinite;
}
.btn-generate .spinner {
  display: none;
  position: absolute; inset: 0;
  align-items: center; justify-content: center;
}
.btn-generate.is-loading .spinner { display: flex; color: #fff; }
.spinner svg { animation: spinStar 0.8s linear infinite; }

/* Upgrade CTA in nav */
.nav .btn-upgrade { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; border: none; }
.nav .btn-upgrade:hover { transform: translateY(-2px); box-shadow: 0 10px 30px var(--accent-glow); }

/* =========================================================
   Emergency Mode toggle + panel styling
   ========================================================= */
.emergency-toggle {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.85rem 0.95rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  transition: border-color 0.25s var(--ease), background-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
  user-select: none;
}
.emergency-toggle:hover { border-color: var(--border-hover); }
.emergency-toggle input { position: absolute; opacity: 0; pointer-events: none; }
.emergency-toggle__box {
  width: 20px; height: 20px;
  border-radius: 6px;
  border: 1.5px solid var(--border-hover);
  background: var(--bg-card);
  flex: none;
  position: relative;
  margin-top: 2px;
  transition: all 0.2s var(--ease);
}
.emergency-toggle__box::after {
  content: "";
  position: absolute;
  left: 5px; top: 1px;
  width: 6px; height: 11px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) scale(0);
  transition: transform 0.2s var(--ease);
}
.emergency-toggle input:checked ~ .emergency-toggle__box {
  background: #ff5a4c;
  border-color: #ff5a4c;
  box-shadow: 0 0 0 3px rgba(255, 90, 76, 0.25);
}
.emergency-toggle input:checked ~ .emergency-toggle__box::after {
  transform: rotate(45deg) scale(1);
}
.emergency-toggle__text { display: flex; flex-direction: column; gap: 0.2rem; line-height: 1.35; }
.emergency-toggle__text b { font-weight: 600; font-size: 0.92rem; color: var(--text-primary); }
.emergency-toggle__text small { color: var(--text-secondary); font-size: 0.78rem; }

.cheat-toggles {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: flex-start;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 0.95rem;
  border-radius: 12px;
  border: 1.5px solid var(--border);
  background: var(--bg-card);
  cursor: pointer;
  font-size: 0.88rem;
  color: var(--text-primary);
  user-select: none;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}
.checkbox-label:hover { border-color: var(--border-hover); }
.checkbox-label input[type="checkbox"] {
  accent-color: var(--accent);
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  cursor: pointer;
}
.checkbox-label input[type="checkbox"]:checked + span { color: var(--accent); }

/* Panel emergency state */
[data-cheat-root].is-emergency [data-cheat-panel],
[data-cheat-root].is-emergency [data-cheat-preview] {
  border-color: #ff5a4c;
  box-shadow: 0 0 0 1px rgba(255, 90, 76, 0.35), 0 0 60px rgba(255, 90, 76, 0.18);
  animation: emergencyPulse 2.4s ease-in-out infinite;
}
[data-cheat-root].is-emergency .emergency-toggle {
  border-color: #ff5a4c;
  background: rgba(255, 90, 76, 0.1);
  box-shadow: 0 0 0 1px rgba(255, 90, 76, 0.25);
}
[data-cheat-root].is-emergency .btn-generate {
  background: linear-gradient(135deg, #ff5a4c, #ff8a3d);
  box-shadow: 0 10px 30px rgba(255, 90, 76, 0.35);
}
[data-cheat-root].is-emergency .btn-generate:hover {
  filter: brightness(1.08);
}
[data-cheat-root].is-emergency [data-cheat-density],
[data-cheat-root].is-emergency [data-cheat-simplicity] {
  opacity: 0.45;
  pointer-events: none;
}
[data-cheat-root].is-emergency [data-cheat-title]::after,
[data-cheat-root].is-emergency [data-cheat-preview-title]::after { content: ""; }

@keyframes emergencyPulse {
  0%, 100% { box-shadow: 0 0 0 1px rgba(255, 90, 76, 0.35), 0 0 40px rgba(255, 90, 76, 0.14); }
  50%      { box-shadow: 0 0 0 1px rgba(255, 120, 70, 0.55), 0 0 70px rgba(255, 90, 76, 0.28); }
}

/* Emergency cheat sheet output */
.cheat-sheet.is-emergency h4 { color: #ff5a4c; }
.cheat-sheet.is-emergency .cheat-sheet__meta span {
  border-color: rgba(255, 90, 76, 0.45);
  color: #ff8a3d;
}
.cheat-emergency-list {
  display: grid;
  gap: 0.65rem;
  grid-template-columns: 1fr;
}
.cheat-emergency-row {
  padding: 0.75rem 0.95rem;
  border-radius: 10px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-left: 3px solid #ff5a4c;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.cheat-emergency-row b {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #ff8a3d;
  font-weight: 600;
}
.cheat-emergency-row span {
  color: var(--text-primary);
  font-size: 0.95rem;
  line-height: 1.5;
}
.cheat-emergency-row.kind-formula span {
  font-family: var(--font-mono);
  color: var(--accent-3);
  font-size: 0.92rem;
}

/* =========================================================
   Context menu (right-click on output)
   ========================================================= */
.ctx-menu {
  position: fixed;
  z-index: 210;
  min-width: 220px;
  padding: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border-hover);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(22px);
  opacity: 0;
  transform: scale(0.96) translateY(-4px);
  transform-origin: top left;
  pointer-events: none;
  transition: opacity 0.14s var(--ease), transform 0.18s var(--ease-out);
}
.ctx-menu.is-open {
  opacity: 1;
  transform: scale(1) translateY(0);
  pointer-events: auto;
}
.ctx-menu__item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  width: 100%;
  padding: 0.6rem 0.75rem;
  border-radius: 8px;
  font-size: 0.9rem;
  color: var(--text-primary);
  text-align: left;
  transition: background-color 0.15s var(--ease), color 0.15s var(--ease);
}
.ctx-menu__item + .ctx-menu__item { margin-top: 2px; }
.ctx-menu__item:hover { background: var(--bg-card-hover); color: var(--accent); }
.ctx-menu__icon { font-size: 1rem; }

/* =========================================================
   Modal (explanation)
   ========================================================= */
.modal {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}
.modal.is-open {
  display: flex;
  animation: fadeIn 0.2s var(--ease-out) both;
}
.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(8px);
  cursor: pointer;
}
[data-theme="light"] .modal__backdrop { background: rgba(20, 20, 40, 0.35); }
.modal__panel {
  position: relative;
  width: min(560px, 100%);
  max-height: min(80vh, 720px);
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border-hover);
  border-radius: 18px;
  box-shadow: var(--shadow-lg), 0 0 80px var(--accent-glow);
  overflow: hidden;
  animation: modalPop 0.3s var(--ease-out) both;
}
@keyframes modalPop {
  from { opacity: 0; transform: translateY(16px) scale(0.97); }
  to   { opacity: 1; transform: none; }
}
.modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}
.modal__title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 400;
  letter-spacing: -0.01em;
}
.modal__close {
  width: 34px; height: 34px;
  border-radius: 10px;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--text-secondary);
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}
.modal__close:hover { background: var(--bg-card-hover); color: var(--text-primary); }
.modal__selection {
  margin: 1rem 1.25rem 0;
  padding: 0.75rem 0.9rem;
  border-left: 2px solid var(--accent);
  background: var(--bg-secondary);
  border-radius: 0 10px 10px 0;
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.5;
  font-style: italic;
  max-height: 110px;
  overflow: auto;
}
.modal__body {
  padding: 1rem 1.25rem 1.5rem;
  overflow: auto;
  color: var(--text-primary);
  font-size: 0.95rem;
  line-height: 1.65;
}
.modal__body p { color: var(--text-primary); }
.modal__body p + p { margin-top: 0.6rem; }
.modal__body strong { color: var(--accent); }
.modal__body ul { padding-left: 1.1rem; list-style: disc; margin: 0.4rem 0; }
.modal__body ul li { margin-bottom: 0.3rem; color: var(--text-secondary); }
.modal__body code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  padding: 0.1rem 0.35rem;
  background: var(--bg-secondary);
  border-radius: 4px;
  color: var(--accent-3);
}

/* Selection highlight inside output */
[data-cheat-output] ::selection {
  background: var(--accent);
  color: #fff;
}

/* =========================================================
   Visualize feature — inline buttons, modal, stage, results host
   ========================================================= */

/* Visualize CTA in output bar */
.btn-viz {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(124,109,255,0.08), rgba(78,205,196,0.08));
  border: 1px solid var(--border-hover);
  color: var(--text-primary);
}
.btn-viz::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(circle at 20% 50%, var(--accent-glow), transparent 60%);
  opacity: 0;
  transition: opacity 0.3s var(--ease);
  pointer-events: none;
}
.btn-viz:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.btn-viz:hover::before { opacity: 1; }

/* Inline "⬡" viz button next to section headings */
.cheat-block__title,
.visual-card h5 {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}
.cheat-block__title > span,
.visual-card h5 > span { flex: 1; min-width: 0; }

.viz-inline {
  margin-left: auto;
  width: 28px; height: 28px;
  border-radius: 8px;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--text-muted);
  border: 1px solid var(--border);
  background: var(--bg-card);
  transition: transform 0.2s var(--ease-out), color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
  font-size: 0.9rem;
  line-height: 1;
  flex: none;
  cursor: pointer;
}
.viz-inline:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--bg-card-hover);
  transform: rotate(30deg) scale(1.08);
}

/* Visualize modal (large) */
.modal--viz .modal__panel--viz {
  width: min(1100px, 90vw);
  max-width: 90vw;
  height: 85vh;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.modal--viz-gallery {
  z-index: 320;
}

/* Viz form (initial state) */
.viz-form {
  padding: 1rem 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  animation: fadeInUp 0.35s var(--ease-out) both;
}
.viz-form[hidden] { display: none; }
.viz-form .input {
  background: var(--bg-secondary);
}
.viz-form .btn-generate { align-self: flex-start; }

/* Viz stage — results / loading / error */
.viz-stage {
  position: relative;
  flex: 1;
  min-height: 0;
  padding: 1rem 1.25rem;
  overflow: hidden;
  display: flex;
  align-items: stretch;
  justify-content: stretch;
  border-top: 1px solid var(--border);
  background:
    radial-gradient(circle at 30% 0%, var(--accent-glow), transparent 55%),
    var(--bg-primary);
}
.viz-stage[hidden] { display: none; }

.viz-results-host {
  width: 100%;
  max-width: 100%;
  position: relative;
  min-height: 0;
  height: 100%;
  overflow: auto;
  padding-right: 0.25rem;
}
.viz-results-shell {
  width: min(960px, 100%);
  margin: 0 auto;
  min-height: 100%;
  animation: vizSvgIn 0.55s var(--ease-out) both;
}
.viz-results-host.is-swapping .viz-results-shell { animation: vizSvgOut 0.35s var(--ease) both; }
.viz-results-summary {
  margin-bottom: 1rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(124,109,255,0.12), rgba(124,109,255,0.04));
  color: var(--text-secondary);
}
.viz-results-summary__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.85rem;
  margin-bottom: 0.35rem;
}
.viz-results-summary strong {
  display: block;
  color: var(--text-primary);
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 400;
}
.viz-results-expand {
  flex-shrink: 0;
}
.viz-results-summary span {
  color: var(--text-secondary);
  font-size: 0.95rem;
}
.viz-results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}
.viz-results-grid--photos {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
@media (max-width: 900px) {
  .viz-results-grid--photos { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 600px) {
  .viz-results-grid--photos { grid-template-columns: 1fr; }
}

/* Diagram view (Mermaid) */
.viz-results-shell--diagram { padding-bottom: 1rem; }
.viz-diagram-badges {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex-shrink: 0;
}
.viz-diagram-expand-btn {
  font-size: 0.8rem;
  padding: 0.28rem 0.6rem;
  border-color: var(--border);
  color: var(--text-secondary);
}
.viz-diagram-expand-btn:hover { color: var(--accent); border-color: var(--accent); }
.viz-mode-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.32rem 0.6rem;
  border-radius: 999px;
  background: rgba(124,109,255,0.15);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  flex-shrink: 0;
}
.viz-diagram-stage {
  margin-top: 0.25rem;
  padding: 1.5rem 1rem;
  border-radius: 22px;
  border: 1px solid var(--border);
  background:
    radial-gradient(circle at 30% 0%, rgba(124,109,255,0.08), transparent 60%),
    var(--bg-card);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  min-height: 320px;
  overflow: auto;
}
/* Chemistry view (SmilesDrawer) */
.viz-results-shell--chemistry { padding-bottom: 1rem; }
.viz-chemistry-badges {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex-shrink: 0;
}
.viz-chemistry-stage {
  margin-top: 0.25rem;
  padding: 1.5rem 1rem;
  border-radius: 22px;
  border: 1px solid var(--border);
  background:
    radial-gradient(circle at 30% 0%, rgba(124,109,255,0.08), transparent 60%),
    var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 450px;
  overflow: auto;
}
.viz-chemistry-stage canvas {
  max-width: 100%;
  height: auto;
  display: block;
}
[data-theme="light"] .viz-chemistry-stage {
  background:
    radial-gradient(circle at 30% 0%, rgba(124,109,255,0.06), transparent 60%),
    #fafbff;
}
.viz-chemistry-explanation {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Math view (Desmos) */
.viz-results-shell--math { padding-bottom: 1rem; }
.viz-math-badges {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex-shrink: 0;
}
.viz-math-stage {
  margin-top: 0.25rem;
  padding: 1.5rem 1rem;
  border-radius: 22px;
  border: 1px solid var(--border);
  background:
    radial-gradient(circle at 30% 0%, rgba(124,109,255,0.08), transparent 60%),
    var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 450px;
  overflow: hidden;
}
[data-theme="light"] .viz-math-stage {
  background:
    radial-gradient(circle at 30% 0%, rgba(124,109,255,0.06), transparent 60%),
    #fafbff;
}
.viz-math-stage > div {
  width: 100%;
  height: 100%;
  border-radius: 16px;
  overflow: hidden;
}
.viz-card {
  overflow: hidden;
  border-radius: 22px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, var(--bg-card-hover), var(--bg-card));
  box-shadow: 0 18px 34px rgba(0, 0, 0, 0.18);
}
[data-theme="light"] .viz-card {
  box-shadow: 0 12px 28px rgba(10, 10, 26, 0.08);
}
.viz-card__media {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background:
    radial-gradient(circle at 20% 20%, rgba(124,109,255,0.2), transparent 45%),
    linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.01));
}
.viz-card__media img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}
.viz-card__body {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}
.viz-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  flex-wrap: wrap;
}
.viz-card__badge {
  padding: 0.3rem 0.55rem;
  border-radius: 999px;
  background: rgba(124,109,255,0.14);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.viz-card__credit {
  color: var(--text-muted);
  font-size: 0.8rem;
}
.viz-card__title {
  margin: 0;
  color: var(--text-primary);
  font-size: 1rem;
  line-height: 1.3;
}
.viz-card__text {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.55;
}
.viz-card__link {
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
}
.viz-card__link:hover {
  color: var(--accent-2);
}
.viz-stage--expanded {
  border-top: 0;
  padding-top: 1.25rem;
}
.viz-results-host--expanded {
  padding-right: 0.1rem;
}

@keyframes vizSvgIn {
  from { opacity: 0; transform: scale(0.96); }
  to   { opacity: 1; transform: none; }
}
@keyframes vizSvgOut {
  from { opacity: 1; transform: none; }
  to   { opacity: 0; transform: scale(1.02); }
}

/* Loading */
.viz-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 1.25rem;
  color: var(--text-secondary);
  z-index: 2;
  background: inherit;
}
.viz-loading[hidden] { display: none; }
.viz-loading p {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  animation: fadeIn 1.2s ease-in-out infinite alternate;
}
.viz-loading__rings {
  position: relative;
  width: 72px; height: 72px;
}
.viz-loading__rings span {
  position: absolute; inset: 0;
  border-radius: 50%;
  border: 2px solid transparent;
  border-top-color: var(--accent);
  animation: spinStar 1.4s linear infinite;
}
.viz-loading__rings span:nth-child(2) {
  inset: 10px;
  border-top-color: var(--accent-2);
  animation-duration: 1.8s;
  animation-direction: reverse;
}
.viz-loading__rings span:nth-child(3) {
  inset: 22px;
  border-top-color: var(--accent-3);
  animation-duration: 1.1s;
}

/* Error */
.viz-error {
  max-width: 420px;
  text-align: center;
  color: var(--text-secondary);
}
.viz-error[hidden] { display: none; }
.viz-error h4 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 400;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}
.viz-error p { margin-bottom: 1rem; }

/* Tail (follow-up + actions) */
.viz-tail {
  padding: 1rem 1.25rem 1.25rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  animation: fadeInUp 0.4s var(--ease-out) both;
  background: var(--bg-card);
}
.viz-tail[hidden] { display: none; }
.viz-tail__actions {
  display: flex;
  gap: 0.5rem;
  justify-content: space-between;
  flex-wrap: wrap;
}
.viz-tail .textarea { min-height: auto; background: var(--bg-secondary); }

/* Fullscreen diagram inside expand modal */
.viz-diagram-fullscreen {
  display: flex;
  flex-direction: column;
  height: 100%;
  gap: 0.85rem;
  padding: 0.25rem 0;
}
.viz-diagram-fullscreen__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0 0.25rem;
  flex-shrink: 0;
}
.viz-diagram-fullscreen__bar strong {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--text-primary);
}
.viz-diagram-fullscreen__stage {
  flex: 1;
  min-height: 0;
  overflow: auto;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  border-radius: 20px;
  border: 1px solid var(--border);
  background:
    radial-gradient(circle at 25% 20%, rgba(124,109,255,0.1), transparent 55%),
    var(--bg-card);
  padding: 2rem;
}
.viz-diagram-fullscreen__stage svg {
  max-width: 100%;
  height: auto;
  display: block;
  margin: auto;
}
[data-theme="light"] .viz-diagram-fullscreen__stage {
  background:
    radial-gradient(circle at 25% 20%, rgba(124,109,255,0.07), transparent 55%),
    #fafbff;
}

@media (max-width: 640px) {
  .modal--viz .modal__panel--viz { height: 95vh; max-height: 95vh; }
  .viz-results-grid { grid-template-columns: 1fr; }
  .viz-results-summary__top {
    flex-direction: column;
    align-items: stretch;
  }
  .viz-results-expand {
    width: 100%;
  }
  .viz-tail__actions .btn { flex: 1; }
}

/* ========================================================
   Mode picker (shown inside viz-form)
   ======================================================== */
.viz-modes {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: 16px;
  background:
    radial-gradient(circle at 0% 0%, rgba(124,109,255,0.08), transparent 60%),
    var(--bg-card);
}
.viz-modes__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.viz-modes__row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}
.viz-modes__hint {
  font-size: 0.82rem;
  color: var(--text-muted);
}
.viz-mode-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 0.95rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-family: var(--font-sans, inherit);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform 0.18s var(--ease-out), background 0.18s var(--ease-out), border-color 0.18s var(--ease-out), color 0.18s var(--ease-out), box-shadow 0.18s var(--ease-out);
  backdrop-filter: blur(8px);
}
.viz-mode-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(124,109,255,0.12);
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(124,109,255,0.18);
}
.viz-mode-btn:active { transform: translateY(0); }
.viz-mode-btn__icon { font-size: 1.05rem; }

/* ========================================================
   Formula breakdown card
   ======================================================== */
.viz-results-shell--formula { padding-bottom: 1rem; }
.viz-formula-card {
  margin-top: 0.25rem;
  padding: 1.5rem 1.25rem 1.4rem;
  border-radius: 22px;
  border: 1px solid var(--border);
  background:
    radial-gradient(circle at 30% 0%, rgba(124,109,255,0.1), transparent 60%),
    var(--bg-card);
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}
.viz-formula-headline {
  text-align: center;
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 400;
  color: var(--accent);
  letter-spacing: 0.01em;
  line-height: 1.1;
  word-break: break-word;
}
.viz-formula-explanation {
  margin: 0 auto;
  max-width: 720px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.55;
}
.viz-formula-comps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 0.75rem;
}
.viz-formula-comp {
  padding: 0.85rem 0.95rem;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  position: relative;
  overflow: hidden;
}
.viz-formula-comp::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--badge-bg, rgba(124,109,255,0.08));
  opacity: 0.6;
  pointer-events: none;
}
.viz-formula-comp > * { position: relative; z-index: 1; }
.viz-formula-comp__head {
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
}
.viz-formula-comp__symbol {
  font-family: var(--font-serif);
  font-size: 1.7rem;
  font-weight: 400;
  color: var(--badge-fg, var(--text-primary));
  line-height: 1;
}
.viz-formula-comp__count {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--text-muted);
}
.viz-formula-comp__role {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.45;
}
.viz-formula-comp.badge-a { --badge-bg: rgba(124,109,255,0.16); --badge-fg: #a59bff; }
.viz-formula-comp.badge-b { --badge-bg: rgba(78,205,196,0.18); --badge-fg: #4ecdc4; }
.viz-formula-comp.badge-c { --badge-bg: rgba(255,107,107,0.18); --badge-fg: #ff8c8c; }
.viz-formula-comp.badge-d { --badge-bg: rgba(255,193,7,0.18); --badge-fg: #ffce4d; }
.viz-formula-comp.badge-e { --badge-bg: rgba(91,192,222,0.18); --badge-fg: #79d2ed; }
.viz-formula-comp.badge-f { --badge-bg: rgba(168,85,247,0.18); --badge-fg: #c89bff; }
[data-theme="light"] .viz-formula-comp.badge-a { --badge-fg: #6655d8; }
[data-theme="light"] .viz-formula-comp.badge-b { --badge-fg: #2c9ea3; }
[data-theme="light"] .viz-formula-comp.badge-c { --badge-fg: #d24a4a; }
[data-theme="light"] .viz-formula-comp.badge-d { --badge-fg: #b48a13; }
[data-theme="light"] .viz-formula-comp.badge-e { --badge-fg: #2487a8; }
[data-theme="light"] .viz-formula-comp.badge-f { --badge-fg: #8a3acf; }

.viz-formula-steps {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}
.viz-formula-steps h5 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0 0 0.15rem;
}
.viz-formula-step {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  padding: 0.7rem 0.9rem;
  border-radius: 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
}
.viz-formula-step__num {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
}
.viz-formula-step__text {
  color: var(--text-primary);
  font-size: 0.94rem;
  line-height: 1.5;
}

/* ========================================================
   Quiz section
   ======================================================== */
.viz-quiz-bar {
  display: flex;
  justify-content: center;
  padding: 0.35rem 1.25rem 0;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
}
.viz-quiz-bar[hidden] { display: none; }
.viz-quiz-trigger {
  font-size: 0.95rem;
  padding: 0.55rem 1.2rem;
  border-radius: 999px;
  background: linear-gradient(135deg, #8B5CF6, #6D28D9);
  color: white;
  border: none;
  font-weight: 700;
  letter-spacing: 0.02em;
  box-shadow: 0 8px 20px rgba(139, 92, 246, 0.4);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.viz-quiz-trigger::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transition: left 0.5s;
}
.viz-quiz-trigger:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 16px 36px rgba(139, 92, 246, 0.6), 0 0 20px rgba(168, 85, 247, 0.4);
  background: linear-gradient(135deg, #A78BFA, #7C3AED);
}
.viz-quiz-trigger:hover::before {
  left: 100%;
}
.viz-quiz-trigger:active {
  transform: translateY(-1px) scale(0.98);
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.5);
}

.viz-quiz {
  padding: 0.85rem 1.25rem 0;
  background: var(--bg-card);
  animation: fadeInUp 0.4s var(--ease-out) both;
}
.viz-quiz[hidden] { display: none; }
.viz-quiz__loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem 0.5rem;
  color: var(--text-secondary);
}
.viz-quiz__loading p {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--text-primary);
}
.viz-quiz__card {
  padding: 1.1rem 1.15rem 1.2rem;
  border-radius: 18px;
  border: 1px solid var(--border);
  background:
    radial-gradient(circle at 0% 0%, rgba(124,109,255,0.08), transparent 60%),
    var(--bg-secondary);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  animation: fadeInUp 0.35s var(--ease-out) both;
}
.viz-quiz__progress {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}
.viz-quiz__q {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--text-primary);
  line-height: 1.35;
}
.viz-quiz__options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem;
}
@media (max-width: 600px) {
  .viz-quiz__options { grid-template-columns: 1fr; }
}
.viz-quiz__option {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-align: left;
  padding: 0.7rem 0.9rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform 0.16s var(--ease-out), border-color 0.16s var(--ease-out), background 0.16s var(--ease-out), color 0.16s var(--ease-out);
}
.viz-quiz__option:hover:not(:disabled) {
  border-color: var(--accent);
  background: rgba(124,109,255,0.08);
  transform: translateY(-1px);
}
.viz-quiz__option:disabled { cursor: default; }
.viz-quiz__option-letter {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(124,109,255,0.18);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
}
.viz-quiz__option-text { flex: 1; line-height: 1.4; }
.viz-quiz__option.is-correct {
  border-color: #4ade80;
  background: rgba(74,222,128,0.16);
  color: #ddffe9;
}
.viz-quiz__option.is-correct .viz-quiz__option-letter {
  background: #4ade80;
  color: #0a2818;
}
.viz-quiz__option.is-wrong {
  border-color: #ff6b6b;
  background: rgba(255,107,107,0.16);
  color: #ffd9d9;
}
.viz-quiz__option.is-wrong .viz-quiz__option-letter {
  background: #ff6b6b;
  color: #2a0d0d;
}
[data-theme="light"] .viz-quiz__option.is-correct { color: #14532d; }
[data-theme="light"] .viz-quiz__option.is-wrong { color: #7f1d1d; }

.viz-quiz__feedback {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 0.8rem 0.95rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  animation: fadeInUp 0.3s var(--ease-out) both;
}
.viz-quiz__feedback[hidden] { display: none; }
.viz-quiz__feedback.is-right {
  border-color: rgba(74,222,128,0.55);
  background: rgba(74,222,128,0.10);
}
.viz-quiz__feedback.is-wrong {
  border-color: rgba(255,107,107,0.55);
  background: rgba(255,107,107,0.10);
}
.viz-quiz__feedback-row {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.viz-quiz__feedback-row strong { color: var(--text-primary); font-size: 1rem; }
.viz-quiz__feedback-row span { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.5; }
.viz-quiz__feedback .btn { align-self: flex-end; }

.viz-quiz__score {
  align-items: center;
  text-align: center;
}
.viz-quiz__score-num {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 400;
  color: var(--accent);
  line-height: 1;
}
.viz-quiz__score p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 1rem;
}
.viz-quiz__score-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
}
.viz-quiz__error strong { color: var(--text-primary); }
.viz-quiz__error span { color: var(--text-secondary); font-size: 0.9rem; }

/* ========================================================
   Image upload zone
   ======================================================== */
.upload-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 24px;
  border: 2px dashed var(--border);
  border-radius: 12px;
  background: var(--bg-secondary);
  cursor: pointer;
  text-align: center;
  transition: border-color 0.2s var(--ease-out), background 0.2s var(--ease-out), transform 0.18s var(--ease-out);
}
.upload-zone:hover {
  border-color: var(--accent);
  background: rgba(124,109,255,0.05);
}
.upload-zone:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.upload-zone.is-dragover {
  border-color: var(--accent);
  background: var(--accent-glow, rgba(124,109,255,0.12));
  transform: scale(1.01);
}
.upload-zone__icon {
  font-size: 1.6rem;
  line-height: 1;
}
.upload-zone__label {
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 500;
}
.upload-zone__label u {
  color: var(--accent);
  text-decoration-color: var(--accent);
  text-underline-offset: 2px;
}
.upload-zone__sub {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.label-optional {
  color: var(--text-muted);
  font-weight: 400;
  font-size: 0.85em;
  text-transform: none;
  letter-spacing: 0;
  margin-left: 0.35rem;
}

.upload-previews {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 0.65rem 0.75rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  animation: fadeInUp 0.3s var(--ease-out) both;
}
.upload-previews[hidden] { display: none; }
.upload-previews__strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.upload-previews__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.upload-thumb {
  position: relative;
  width: 60px;
  height: 60px;
  border-radius: 8px;
  overflow: visible;
  flex-shrink: 0;
}
.upload-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--border);
  display: block;
}
.upload-thumb__remove {
  position: absolute;
  top: -6px;
  right: -6px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  color: white;
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(0,0,0,0.25);
  transition: transform 0.15s var(--ease-out), background 0.15s var(--ease-out);
}
.upload-thumb__remove:hover {
  transform: scale(1.12);
  background: var(--accent-2, var(--accent));
}
.btn-link {
  background: none;
  border: none;
  padding: 0;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.btn-link:hover { color: var(--accent-2, var(--accent)); }

/* =========================================================
   Visual Notes — interactive layer
   Connection Web · Deep Dive · Focus Mode
   ========================================================= */

/* Toolbar in visual-summary hero */
.vn-toolbar {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-left: auto;
}
.vn-tool-btn {
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.vn-tool-btn.is-active {
  background: var(--accent-glow);
  border-color: var(--accent);
  color: var(--text-primary);
}

/* Card status indicators */
.vn-card { position: relative; transition: border-color 0.2s var(--ease); }
.vn-card[data-status="known"] { border-left: 3px solid var(--success, #2ecc71); }
.vn-card[data-status="learning"] { border-left: 3px solid var(--warning, #f59e0b); }

/* Per-card focus button */
.vn-focus-btn {
  position: absolute;
  top: 0.55rem;
  right: 0.55rem;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.85);
  transition: opacity 0.18s var(--ease), transform 0.18s var(--ease), background-color 0.18s var(--ease), border-color 0.18s var(--ease);
  z-index: 4;
  padding: 0;
}
.vn-card:hover .vn-focus-btn,
.vn-focus-btn:focus-visible { opacity: 1; transform: scale(1); }
.vn-focus-btn:hover { background: var(--accent); border-color: var(--accent); color: #fff; }

/* Hoverable words for Deep Dive */
.vn-word {
  cursor: pointer;
  border-radius: 2px;
  transition: background-color 0.15s var(--ease), border-color 0.15s var(--ease);
  border-bottom: 1.5px dotted transparent;
}
.vn-word:hover {
  background: rgba(124, 109, 255, 0.15);
  border-bottom-color: var(--accent);
}

/* Connection Web SVG lines */
.vn-grid { position: relative; }
#vnConnectionSvg .vn-conn-line {
  animation: vnDashFlow 1s linear infinite;
}
@keyframes vnDashFlow {
  to { stroke-dashoffset: -10; }
}
#vnConnectionSvg .vn-conn-dot {
  transition: r 0.15s var(--ease), opacity 0.15s var(--ease);
}
#vnConnectionSvg .vn-conn-dot:hover { opacity: 1; }

/* Connection floating modal */
.vn-conn-modal {
  position: fixed;
  width: 400px;
  max-width: calc(100vw - 24px);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.35);
  z-index: 1100;
  overflow: hidden;
  animation: vnConnIn 0.2s var(--ease, ease-out);
}
@keyframes vnConnIn {
  from { opacity: 0; transform: translateY(-6px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.vn-conn-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-secondary);
}
.vn-conn-modal__header h4 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  margin: 0;
}
.vn-conn-modal__close {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1rem;
  width: 26px;
  height: 26px;
  border-radius: 6px;
}
.vn-conn-modal__close:hover { background: var(--bg-card-hover); color: var(--text-primary); }
.vn-conn-modal__body {
  padding: 0.95rem 1rem;
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.5;
}
.vn-conn-modal__footer {
  padding: 0.65rem 1rem 0.95rem;
  display: flex;
  justify-content: flex-end;
}

/* Deep Dive panel */
.vn-deepdive-panel {
  position: absolute;
  top: 0;
  right: 0;
  width: 320px;
  max-width: 90%;
  height: 100%;
  background: var(--bg-card);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 20;
  box-shadow: -8px 0 24px rgba(0, 0, 0, 0.18);
}
.vn-deepdive-panel.is-open { transform: translateX(0); }

.vn-deepdive-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-secondary);
}
.vn-deepdive-header #vnDeepDiveTitle {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-primary);
  word-break: break-word;
  flex: 1;
}
.vn-deepdive-nav { display: flex; gap: 0.35rem; }
.vn-deepdive-nav button {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-radius: 6px;
  padding: 0.25rem 0.55rem;
  font-size: 0.78rem;
  cursor: pointer;
  font-family: inherit;
}
.vn-deepdive-nav button:hover:not(:disabled) { background: var(--bg-card-hover); color: var(--text-primary); }
.vn-deepdive-nav button:disabled { opacity: 0.45; cursor: not-allowed; }

.vn-deepdive-content {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}
.vn-dd-def {
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text-primary);
  font-family: var(--font-serif);
}
.vn-dd-row {
  display: flex;
  gap: 0.5rem;
  align-items: flex-start;
  padding: 0.65rem 0.75rem;
  border-radius: 10px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.45;
}
.vn-dd-icon { flex: 0 0 auto; font-size: 1rem; line-height: 1.4; }
.vn-dd-block h6 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.45rem;
}
.vn-dd-facts { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 0.4rem; }
.vn-dd-facts li {
  display: flex;
  gap: 0.5rem;
  align-items: flex-start;
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.45;
}
.vn-dd-check {
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  border-radius: 4px;
  background: var(--accent-glow);
  color: var(--accent);
  font-size: 11px;
  line-height: 16px;
  text-align: center;
  font-weight: 700;
}
.vn-dd-chips { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.vn-term-chip {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  font-size: 0.78rem;
  cursor: pointer;
  font-family: inherit;
  transition: background-color 0.15s var(--ease), border-color 0.15s var(--ease), color 0.15s var(--ease);
}
.vn-term-chip:hover {
  background: var(--accent-glow);
  border-color: var(--accent);
  color: var(--text-primary);
}

.vn-deepdive-breadcrumbs {
  padding: 0.55rem 1rem;
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem;
  min-height: 0;
}
.vn-deepdive-breadcrumbs:empty { display: none; }
.vn-bc { color: var(--text-secondary); }
.vn-bc.is-current { color: var(--accent); font-weight: 600; }
.vn-bc-sep { opacity: 0.6; }

/* Focus Mode overlay */
.vn-focus-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  background-image: radial-gradient(circle at 20% 0%, var(--accent-glow), transparent 50%),
                    radial-gradient(circle at 80% 100%, rgba(78, 205, 196, 0.12), transparent 55%);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  padding: 1.5rem clamp(1rem, 4vw, 3rem);
  gap: 1rem;
  opacity: 0;
  transition: opacity 0.25s var(--ease, ease);
}
.vn-focus-overlay.is-open { opacity: 1; }

.vn-focus-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.vn-focus-counter {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
}
.vn-focus-progress {
  height: 6px;
  border-radius: 999px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  overflow: hidden;
}
.vn-focus-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.4s ease;
}
.vn-focus-stage {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.vn-focus-card {
  width: min(600px, 92vw);
  padding: 2rem;
  font-size: 1.05rem;
  border-radius: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  position: relative;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
}
.vn-focus-card h5 { font-size: 1.4rem; }
.vn-focus-card .visual-card__icon { font-size: 2rem; }
.vn-focus-body { transition: opacity 0.2s ease; }
.vn-focus-card.is-loading { pointer-events: none; }
.vn-focus-card.is-loading::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit;
  background: linear-gradient(100deg, transparent 30%, rgba(255,255,255,0.06) 50%, transparent 70%);
  background-size: 200% 100%;
  animation: skeletonShine 1.2s linear infinite;
  pointer-events: none;
}

.vn-out-right { transform: translateX(100%); opacity: 0; }
.vn-out-left { transform: translateX(-100%); opacity: 0; }

.vn-focus-actions {
  display: flex;
  justify-content: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}
.vn-focus-action {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-family: inherit;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease), transform 0.12s var(--ease);
}
.vn-focus-action:hover { transform: translateY(-1px); border-color: var(--accent); }
.vn-focus-known:hover { background: rgba(46, 204, 113, 0.18); border-color: var(--success, #2ecc71); }
.vn-focus-repeat:hover { background: rgba(245, 158, 11, 0.18); border-color: var(--warning, #f59e0b); }
.vn-focus-rephrase:hover { background: var(--accent-glow); border-color: var(--accent); }

.vn-focus-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}
.vn-focus-help {
  text-align: center;
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  margin-top: 0.25rem;
}

.vn-focus-flash {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.85);
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  pointer-events: none;
  z-index: 10;
  opacity: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.3);
}
.vn-focus-flash.is-in { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.vn-focus-flash.is-out { opacity: 0; transform: translate(-50%, -60%) scale(0.95); }
.vn-focus-flash--success { border-color: var(--success, #2ecc71); }
.vn-focus-flash--warn { border-color: var(--warning, #f59e0b); }

.vn-focus-summary {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  align-items: center;
  padding: 2rem;
}
.vn-focus-summary h3 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--text-primary);
}
.vn-focus-summary p { color: var(--text-secondary); }

@media (max-width: 720px) {
  .vn-deepdive-panel { width: 88%; }
  .vn-conn-modal { width: 320px; }
  .vn-focus-card { padding: 1.4rem; }
}

/* =========================================================
   Visual Notes — Progress Tracker, Smart Links, Export Suite
   ========================================================= */

/* Progress bar */
.vn-progress-bar {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  width: 100%;
  margin-bottom: 0.5rem;
}
.vn-progress-bar__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
}
.vn-progress-bar__track {
  height: 8px;
  background: var(--border);
  border-radius: 99px;
  display: flex;
  overflow: hidden;
}
.vn-progress-segment { height: 100%; transition: width 0.4s ease; }
.vn-seg-known    { background: #4ade80; }
.vn-seg-learning { background: #fbbf24; }
.vn-seg-new      { background: var(--border); }
.vn-progress-bar__legend {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}
.vn-legend-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

/* Card status badge */
.vn-status-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 3px 12px;
  border-radius: 99px;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
  pointer-events: all;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
  border: 1.5px solid transparent;
  z-index: 10;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}
.vn-badge-new      { background: var(--bg-secondary); border-color: var(--border); color: var(--text-muted); }
.vn-badge-learning { background: rgba(251,191,36,0.18); border-color: #fbbf24; color: #d97706; }
.vn-badge-known    { background: rgba(74,222,128,0.18); border-color: #4ade80; color: #16a34a; }
.vn-status-badge:hover { filter: brightness(1.15); }

/* Smart Links */
.vn-smart-links {
  padding: 1rem;
  border-top: 1px solid var(--border);
  margin-top: 0.5rem;
}
.vn-smart-links__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
}
.vn-smart-links__row { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.vn-smart-link-chip {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 0.55rem 0.75rem;
  border-radius: 10px;
  background: var(--bg-card);
  border: 1px solid var(--accent);
  max-width: 200px;
  cursor: default;
  animation: vnConnIn 0.25s var(--ease, ease-out);
}
.vn-smart-link-icon { font-size: 1rem; }
.vn-smart-link-topic { font-size: 0.85rem; font-weight: 600; color: var(--text-primary); }
.vn-smart-link-reason { font-size: 0.72rem; color: var(--text-secondary); line-height: 1.4; }

/* Export dropdown */
.vn-export-wrapper { position: relative; }
.vn-export-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 6px;
  min-width: 220px;
  z-index: 100;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  animation: vnConnIn 0.18s var(--ease, ease-out);
}
.vn-export-menu button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 10px 14px;
  border-radius: 8px;
  border: none;
  background: none;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 0.88rem;
  font-family: inherit;
  transition: background-color 0.15s var(--ease);
}
.vn-export-menu button:hover { background: var(--bg-card-hover); }

/* KaTeX formula hover (clickable → Deep Dive) */
.katex { cursor: default; transition: background 0.15s, outline 0.15s; border-radius: 3px; padding: 1px 2px; }
.katex-display .katex { cursor: pointer; }
.vn-card .katex { cursor: pointer; }
.vn-card .katex:hover { background: rgba(124,109,255,0.15); outline: 1.5px solid rgba(124,109,255,0.5); }
.vn-focus-stage .katex { cursor: pointer; }
.vn-focus-stage .katex:hover { background: rgba(124,109,255,0.15); outline: 1.5px solid rgba(124,109,255,0.5); }

/* ─── Mobile app panels (FIX 1–6) ──────────────────────── */
@media (max-width: 768px) {
  /* FIX 1 — prevent horizontal overflow, disable iOS text size boost */
  html, body {
    width: 100%;
    overflow-x: hidden;
    -webkit-text-size-adjust: 100%;
  }

  /* Tool panels: full width, compact padding */
  .panel, .tool-panel {
    width: 100% !important;
    max-width: 100% !important;
    padding: 12px !important;
    box-sizing: border-box;
  }

  /* FIX 2 — handwriting compact layout */

  /* Style buttons already 2-col globally; ensure compact sizing on mobile */
  .hw-style-btn {
    padding: 8px 10px !important;
    font-size: 12px !important;
  }

  /* Template grid: 2 columns instead of 3 */
  .hw-template-grid {
    grid-template-columns: 1fr 1fr !important;
  }

  /* Drop zone: shorter on mobile */
  .hw-drop-zone {
    min-height: 80px !important;
    padding: 12px !important;
  }

  /* Generate button: full width */
  .btn-generate {
    width: 100% !important;
    padding: 14px !important;
    font-size: 15px !important;
  }

  /* Prevent iOS zoom on input focus (must be 16px+) */
  .input, .textarea, .select,
  input[type="text"], input[type="email"],
  input[type="password"], input[type="number"],
  input[type="search"], textarea, select {
    font-size: 16px !important;
  }

  /* Ink color dots */
  .hw-color-row { flex-wrap: wrap; gap: 8px; }

  /* Sloppiness slider */
  .slider { width: 100%; }

  /* Horizontal scroll containers */
  .output-actions { overflow-x: auto; -webkit-overflow-scrolling: touch; flex-wrap: nowrap; scrollbar-width: none; }
  .output-actions::-webkit-scrollbar { display: none; }

  /* FIX 3 — canvas result area: full width, horizontally scrollable */
  .handwrite-canvas-wrapper {
    width: 100% !important;
    max-width: 100% !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
  }

  canvas {
    max-width: 100% !important;
    height: auto !important;
  }

  /* Editor / zoom toolbar */
  .hw-mode-bar, .hw-shape-bar { flex-wrap: wrap; }
  .hw-zoom-badge { font-size: 11px; padding: 2px 6px; }

  /* FIX 6 — handwrite panel overflow */
  .handwrite-right-panel { width: 100%; overflow-x: hidden; box-sizing: border-box; }
  .handwrite-stage {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding: 16px 0;
  }
  .handwrite-stage::-webkit-scrollbar { display: none; }
}

/* Selection tooltip */
.vn-selection-tooltip {
  position: fixed;
  z-index: 500;
  background: var(--bg-card);
  border: 1px solid var(--accent);
  border-radius: 10px;
  padding: 6px 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  animation: fadeInUp 0.15s ease;
}
.vn-selection-tooltip button {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 7px;
  padding: 6px 14px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  font-family: inherit;
}

/* Lazy Sheet button */
.lazy-btn {
  width: 100%;
  padding: 10px;
  border-radius: 10px;
  border: 1.5px dashed var(--accent);
  background: transparent;
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-top: 8px;
}
.lazy-btn:hover {
  background: var(--accent-glow);
  border-style: solid;
}
.lazy-btn--active {
  border-style: solid;
  background: var(--accent-glow);
  border-color: var(--accent);
}

/* Lazy Sheet output */
.lazy-sheet { padding: 8px; }
.lazy-sheet__header { margin-bottom: 20px; }
.lazy-sheet__eyebrow { font-size: 11px; font-weight: 700; letter-spacing: 0.1em; color: var(--accent); }
.lazy-sheet__title { font-size: 22px; font-weight: 700; margin: 4px 0; color: var(--text-primary); }
.lazy-sheet__sub { font-size: 12px; color: var(--text-secondary); }
.lazy-sheet__grid { display: flex; flex-direction: column; gap: 10px; }

.lazy-term {
  padding: 12px 16px;
  border-radius: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: border 0.2s;
}
.lazy-term--star {
  border-color: var(--accent);
  background: var(--accent-glow);
}
.lazy-term__header { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.lazy-star { font-size: 14px; }
.lazy-term__name { font-weight: 700; font-size: 15px; color: var(--text-primary); }
.lazy-term__def { font-size: 13px; color: var(--text-secondary); line-height: 1.6; margin: 0; }

/* =========================================================
   Auth Modal — dark playful style
   ========================================================= */

@keyframes authSlideUp {
  from { opacity: 0; transform: translateY(32px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes authFadeIn {
  from { opacity: 0; } to { opacity: 1; }
}
@keyframes authShake {
  0%, 100% { transform: translateX(0); }
  20%      { transform: translateX(-6px); }
  40%      { transform: translateX(6px); }
  60%      { transform: translateX(-4px); }
  80%      { transform: translateX(4px); }
}
@keyframes authSubtitleSwap {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.auth-modal-backdrop {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(12px);
  display: flex; align-items: center; justify-content: center;
  padding: 16px;
  animation: authFadeIn 0.2s ease;
}
.auth-modal-backdrop[hidden] { display: none; }

.auth-modal {
  background: #13121e;
  border: 1px solid rgba(124, 109, 255, 0.18);
  border-radius: 24px;
  padding: 36px 32px 32px;
  width: 100%;
  max-width: 420px;
  position: relative;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.04), 0 32px 80px rgba(0,0,0,0.7);
  animation: authSlideUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.auth-modal__close {
  position: absolute; top: 18px; right: 18px;
  background: none; border: none;
  color: rgba(255,255,255,0.3); cursor: pointer;
  font-size: 16px; line-height: 1;
  border-radius: 6px; padding: 4px 7px;
  transition: color 0.2s, background 0.2s;
}
.auth-modal__close:hover { color: rgba(255,255,255,0.7); background: rgba(255,255,255,0.06); }

.auth-modal__header { margin-bottom: 24px; }
.auth-modal__logo {
  font-size: 20px; font-weight: 700;
  color: var(--accent);
  margin-bottom: 4px;
}
.auth-subtitle {
  font-size: 13px; color: rgba(255,255,255,0.4);
  margin: 0;
  animation: authSubtitleSwap 0.3s ease;
}

/* Tabs */
.auth-tabs {
  display: flex; gap: 4px;
  background: rgba(255,255,255,0.05);
  border-radius: 12px; padding: 4px;
  margin-bottom: 28px;
}
.auth-tab {
  flex: 1; padding: 9px 12px; border: none;
  background: none; border-radius: 9px;
  color: rgba(255,255,255,0.45); cursor: pointer;
  font-size: 14px; font-weight: 600;
  letter-spacing: 0.01em;
  transition: color 0.2s, background 0.2s, box-shadow 0.2s;
}
.auth-tab--active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 16px rgba(124,109,255,0.45);
}
.auth-tab:not(.auth-tab--active):hover { color: rgba(255,255,255,0.75); background: rgba(255,255,255,0.07); }

/* Fields */
.auth-field { display: flex; flex-direction: column; gap: 7px; margin-bottom: 18px; }
.auth-label {
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: rgba(255,255,255,0.45);
}
.auth-label-row {
  display: flex; align-items: center; justify-content: space-between;
}
.auth-forgot {
  background: none; border: none; padding: 0;
  font-size: 11px; color: var(--accent); cursor: pointer;
  font-weight: 500; opacity: 0.85;
  transition: opacity 0.2s;
}
.auth-forgot:hover { opacity: 1; }

/* Inputs */
.auth-input {
  width: 100%;
  padding: 13px 16px;
  background: rgba(255,255,255,0.06);
  border: 1.5px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  color: rgba(255,255,255,0.9);
  font-size: 14px;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
  outline: none;
  box-sizing: border-box;
}
.auth-input::placeholder { color: rgba(255,255,255,0.25); }
.auth-input:focus {
  border-color: var(--accent);
  background: rgba(124,109,255,0.08);
  box-shadow: 0 0 0 3px rgba(124,109,255,0.18);
}

.auth-input-wrap { position: relative; }
.auth-input-wrap .auth-input { padding-right: 46px; }
.auth-eye {
  position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
  background: none; border: none; cursor: pointer;
  color: rgba(255,255,255,0.3); font-size: 15px; padding: 4px;
  transition: color 0.2s;
  line-height: 1;
}
.auth-eye:hover { color: rgba(255,255,255,0.65); }

.auth-remember {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  margin: -4px 0 16px;
  color: rgba(255,255,255,0.48);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  user-select: none;
}
.auth-remember input {
  width: 15px;
  height: 15px;
  margin: 0;
  accent-color: var(--accent);
  cursor: pointer;
}
.auth-remember:hover { color: rgba(255,255,255,0.72); }

/* Strength bar */
.auth-strength {
  height: 3px;
  background: rgba(255,255,255,0.08);
  border-radius: 99px; margin-top: 10px; overflow: hidden;
}
.auth-strength__bar { height: 100%; width: 0; border-radius: 99px; transition: width 0.35s, background 0.35s; }
.auth-strength__label { font-size: 11px; margin-top: 5px; font-weight: 600; transition: color 0.3s; }

/* Requirements */
.auth-requirements { list-style: none; padding: 0; margin: 10px 0 0; display: flex; flex-direction: column; gap: 5px; }
.req-item {
  font-size: 12px;
  color: rgba(255,255,255,0.35);
  transition: color 0.25s;
  display: flex; align-items: center; gap: 6px;
}
.req-item.req-ok { color: #4ade80; }

/* Match */
.auth-match { font-size: 12px; margin-top: 6px; font-weight: 500; }
.auth-match.match-ok { color: #4ade80; }
.auth-match.match-fail { color: #f87171; }

/* Error */
.auth-error {
  background: rgba(248,113,113,0.1);
  border: 1px solid rgba(248,113,113,0.25);
  border-radius: 10px; padding: 10px 14px;
  font-size: 13px; color: #f87171;
  margin-bottom: 14px;
}
.auth-error[hidden] { display: none; }
.auth-error.is-shaking { animation: authShake 0.4s ease; }

/* Submit button */
.auth-submit {
  width: 100%;
  padding: 14px 20px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 14px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  margin-bottom: 18px;
  position: relative;
  overflow: hidden;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s;
  box-shadow: 0 6px 24px rgba(124,109,255,0.4);
}
.auth-submit::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 60%);
  pointer-events: none;
}
.auth-submit:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 10px 32px rgba(124,109,255,0.55);
  background: #9080ff;
}
.auth-submit:active:not(:disabled) { transform: translateY(0); box-shadow: 0 4px 16px rgba(124,109,255,0.35); }
.auth-submit:disabled { opacity: 0.4; cursor: not-allowed; box-shadow: none; }

/* Switch line */
.auth-switch {
  font-size: 13px; color: rgba(255,255,255,0.35);
  text-align: center; margin: 0;
}
.auth-link {
  background: none; border: none;
  color: var(--accent); cursor: pointer;
  font-size: 13px; font-weight: 700; padding: 0;
  transition: opacity 0.2s;
}
.auth-link:hover { opacity: 0.8; }

/* OTP step */
.auth-otp-icon { font-size: 44px; text-align: center; margin-bottom: 10px; }
.auth-otp-title { text-align: center; margin: 0 0 6px; font-size: 20px; font-weight: 700; color: #fff; }
.auth-otp-sub { text-align: center; color: rgba(255,255,255,0.4); font-size: 13px; margin-bottom: 24px; }
.auth-otp-inputs { display: flex; gap: 10px; justify-content: center; margin-bottom: 22px; }
.otp-digit {
  width: 48px; height: 58px;
  text-align: center;
  font-size: 24px; font-weight: 700;
  border-radius: 12px;
  border: 1.5px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.06);
  color: #fff;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
  outline: none;
}
.otp-digit:focus {
  border-color: var(--accent);
  background: rgba(124,109,255,0.1);
  box-shadow: 0 0 0 3px rgba(124,109,255,0.2);
}
.otp-digit.otp-filled { border-color: rgba(124,109,255,0.6); }

/* Form transition */
.auth-form { animation: authSubtitleSwap 0.2s ease; }

/* =========================================================
   User Menu
   ========================================================= */

.user-menu { position: relative; }
.user-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--accent); color: white;
  border: none; cursor: pointer;
  font-size: 15px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 14px rgba(124,109,255,0.4);
  transition: transform 0.15s, box-shadow 0.2s;
}
.user-avatar:hover { transform: scale(1.08); box-shadow: 0 6px 20px rgba(124,109,255,0.55); }
.user-dropdown {
  position: absolute; right: 0; top: calc(100% + 8px);
  background: #13121e; border: 1px solid rgba(124,109,255,0.2);
  border-radius: 14px; padding: 8px; min-width: 210px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.5); z-index: 200;
  animation: authSlideUp 0.2s cubic-bezier(0.34,1.56,0.64,1);
}
.user-dropdown[hidden] { display: none; }
.user-dropdown__email { padding: 8px 12px; font-size: 13px; color: rgba(255,255,255,0.45); font-weight: 500; }
.user-dropdown__plan { padding: 2px 12px 10px; font-size: 12px; color: var(--accent); font-weight: 600; }
.user-dropdown__divider { border: none; border-top: 1px solid rgba(255,255,255,0.08); margin: 4px 0; }
.user-dropdown__item {
  display: block; width: 100%; text-align: left;
  padding: 9px 12px; border: none; background: none;
  color: rgba(255,255,255,0.7); cursor: pointer;
  border-radius: 8px; font-size: 13px;
  transition: background 0.15s, color 0.15s;
}
.user-dropdown__item:hover { background: rgba(248,113,113,0.1); color: #f87171; }
/* ============================================
   MOBILE FIX — max-width: 768px
   ============================================ */
@media (max-width: 768px) {

  /* 1 — NAV: stack brand + actions on top, tabs below */
  .nav__inner {
    flex-wrap: wrap;
    gap: 6px;
    padding: 8px 12px;
  }

  /* Brand stays left, actions stay right */
  .nav__brand {
    flex: 1;
    font-size: 15px;
  }

  /* Move tabs-wrap to its own full-width row below */
  .tabs-wrap {
    order: 3;
    width: 100%;
    margin-bottom: 0;
    justify-content: flex-start;
  }

  .tabs {
    width: 100%;
    justify-content: space-between;
  }

  .tab {
    flex: 1;
    justify-content: center;
    padding: 0.5rem 0.4rem;
    font-size: 0.75rem;
    gap: 0.25rem;
  }

  /* Hide upgrade button on mobile to save space */
  .btn-upgrade { display: none !important; }

  /* 2 — TOOL GRID: single column, no overflow */
  .tool-grid {
    grid-template-columns: 1fr !important;
    gap: 1rem;
  }

  /* 3 — PANELS: fit screen width */
  .tool-panel,
  .panel__left,
  .panel__right {
    width: 100% !important;
    max-width: 100vw !important;
    box-sizing: border-box;
    overflow-x: hidden;
  }

  /* 4 — HANDWRITING CANVAS: fit and center */
  .handwrite-canvas-wrapper {
    width: 100% !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    display: flex;
    justify-content: center;
  }

  /* Canvas itself — don't force 100% width (it has fixed px size)
     but make the wrapper scrollable so user can pan */
  .handwrite-canvas-wrapper canvas {
    flex-shrink: 0;
  }

  /* 5 — HW STAGE: reduce empty grey space */
  .hw-stage,
  [data-hw-stage],
  .hw-canvas-bg {
    min-height: 400px !important;
    padding: 8px !important;
  }

  /* 6 — HW MODE/SHAPE bars: wrap nicely */
  .hw-mode-bar,
  .hw-shape-bar {
    flex-wrap: wrap;
    gap: 4px;
  }

  .hw-mode-btn,
  .hw-shape-btn {
    font-size: 0.72rem;
    padding: 0.25rem 0.55rem;
  }

  /* 7 — CONTAINER: no horizontal bleed */
  .container {
    padding-left: 12px !important;
    padding-right: 12px !important;
    width: 100% !important;
    box-sizing: border-box;
  }

  /* 8 — GENERAL overflow guard */
  body {
    overflow-x: hidden;
    width: 100vw;
  }
}

/* Extra small phones (iPhone mini, SE) */
@media (max-width: 390px) {
  .tab { font-size: 0.68rem; padding: 0.45rem 0.25rem; }
  .nav__brand { font-size: 13px; }
}
/* ================================================
   MOBILE FIX v3 — surgical, based on real classes
   ================================================ */

@media (max-width: 768px) {

  /* ── 1. Kill horizontal overflow globally ── */
  html, body {
    overflow-x: hidden;
    width: 100%;
  }

  /* ── 2. Container: full width with padding ── */
  .container {
    padding-left: 12px !important;
    padding-right: 12px !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  /* ── 3. Tool grid: single column, no overflow ── */
  .tool-grid {
    grid-template-columns: 1fr !important;
    width: 100% !important;
    overflow-x: hidden !important;
  }

  /* ── 4. Panel: full width ── */
  .panel,
  aside.panel {
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
    overflow-x: hidden !important;
  }

  /* ── 5. HANDWRITING CANVAS: scale down to fit ── */
  /* The stage clips the A4 canvas — on mobile we scale it */
  .handwrite-stage {
    width: 100% !important;
    min-height: 0 !important;
    overflow: visible !important;
    touch-action: none;
    padding: 8px !important;
    align-items: center !important;
    /* Override desktop's flex:1 — JS sets exact height; don't grow in flex-column parent */
    flex: 0 0 auto !important;
  }

  .handwrite-canvas-wrapper {
    touch-action: none;
  }

  /* JS (applyZoom) handles canvas scaling on mobile — no CSS transform here */

  /* ── 6. Fields and inputs: prevent overflow and iOS zoom ── */
  .field-stack,
  .hw-props,
  .panel__body {
    width: 100% !important;
    box-sizing: border-box !important;
    overflow-x: hidden !important;
  }

  input[type="text"],
  input[type="email"],
  input[type="number"],
  input[type="search"],
  textarea,
  select,
  .input,
  .textarea,
  .select {
    font-size: 16px !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }

  /* ── 7. Cheat sheet output: no overflow ── */
  .cheat-sheet-output,
  .lazy-sheet,
  .vn-output,
  .visual-out {
    width: 100% !important;
    max-width: 100% !important;
    overflow-x: hidden !important;
    box-sizing: border-box !important;
  }

  /* ── 8. Visual notes cards: single column ── */
  .vn-grid,
  .visual-out {
    grid-template-columns: 1fr !important;
  }

  /* ── 9. Output action buttons: wrap ── */
  .output-actions {
    flex-wrap: wrap !important;
    gap: 8px !important;
  }

  /* ── 10. Drop zones: compact ── */
  .hw-drop-zone,
  .vn-drop-zone,
  [data-drop-zone] {
    min-height: 80px !important;
    padding: 16px !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }
}

/* ── Mobile HW fullscreen editor ── */
.hw-fullscreen-overlay {
  display: none;
}

@media (max-width: 768px) {
  /* Hide the stage panel on mobile — replaced by fullscreen */
  .handwrite-stage {
    display: none !important;
  }

  /* Fullscreen overlay */
  .hw-fullscreen-overlay {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: #525659;
    overflow: hidden;
  }

  .hw-fullscreen-overlay.hw-fs-hidden {
    display: none !important;
  }

  /* Top bar */
  .hw-fs-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: rgba(30, 30, 40, 0.92);
    backdrop-filter: blur(8px);
    flex-shrink: 0;
    gap: 8px;
    z-index: 2;
  }

  .hw-fs-back {
    background: none;
    border: none;
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    padding: 6px 10px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
  }

  .hw-fs-back:active { background: rgba(255,255,255,0.1); }

  .hw-fs-zoom-badge {
    font-size: 13px;
    color: rgba(255,255,255,0.7);
    background: rgba(255,255,255,0.1);
    border-radius: 20px;
    padding: 4px 10px;
    cursor: pointer;
  }

  .hw-fs-export {
    background: var(--accent, #7c6aff);
    border: none;
    color: #fff;
    font-size: 13px;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 8px;
    cursor: pointer;
  }

  /* Canvas area — fills remaining space */
  .hw-fs-canvas-area {
    flex: 1;
    overflow: hidden;
    position: relative;
    touch-action: none;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 16px;
  }

  /* Bottom floating toolbar */
  .hw-fs-toolbar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 14px;
    background: rgba(30, 30, 40, 0.92);
    backdrop-filter: blur(8px);
    flex-shrink: 0;
    flex-wrap: wrap;
  }

  .hw-fs-tool-btn {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.15);
    color: #fff;
    font-size: 12px;
    font-weight: 500;
    padding: 6px 12px;
    border-radius: 8px;
    cursor: pointer;
    white-space: nowrap;
  }

  .hw-fs-tool-btn.is-active {
    background: var(--accent, #7c6aff);
    border-color: var(--accent, #7c6aff);
  }

  .hw-fs-shape-btn {
    background: rgba(255,255,255,0.07);
    border: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.8);
    font-size: 11px;
    padding: 5px 10px;
    border-radius: 6px;
    cursor: pointer;
  }

  /* "Open full editor" button — show on mobile */
  .hw-open-fullscreen-btn {
    display: flex !important;
    width: 100%;
    margin-top: 12px;
  }
}

/* Hide open-fullscreen btn on desktop */
@media (min-width: 769px) {
  .hw-open-fullscreen-btn { display: none !important; }
}

/* Desktop-only notice for handwriting on mobile */
.hw-desktop-only {
  display: none;
}

@media (max-width: 768px) {
  .hw-desktop-only {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 48px 24px;
    gap: 16px;
  }

  .hw-desktop-only__icon {
    font-size: 56px;
  }

  .hw-desktop-only__title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
  }

  .hw-desktop-only__sub {
    font-size: 0.95rem;
    color: var(--text-secondary);
    max-width: 280px;
    line-height: 1.6;
    margin: 0;
  }

  /* Hide the actual handwriting tool content on mobile */
  #hwDesktopOnly ~ * {
    display: none !important;
  }
}