:root {
  --bg: #1a1a1a;
  --bg-elev: #242424;
  --bg-input: #2f2f2f;
  --border: rgba(255, 255, 255, 0.08);
  --text: #f1f1f1;
  --text-muted: rgba(255, 255, 255, 0.55);
  --accent: #e2687a;
  --accent-pressed: #c9505f;
  --danger: #d4564c;
  --radius: 14px;
  --radius-sm: 8px;
  --safe-top: env(safe-area-inset-top, 0);
  --safe-bottom: env(safe-area-inset-bottom, 0);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  user-select: none;
  -webkit-user-select: none;
  overscroll-behavior: none;
}

a { color: var(--accent); }

button {
  font: inherit;
  color: inherit;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  min-height: 44px;
  cursor: pointer;
}
button:active { background: var(--bg-input); }
button:disabled { opacity: 0.45; cursor: default; }
button.primary { background: var(--accent); color: #1a1a1a; border-color: transparent; font-weight: 600; }
button.primary:active { background: var(--accent-pressed); }
button.ghost { background: transparent; border-color: var(--border); }

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

#app {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
}

.screen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  background: var(--bg);
}

.screen-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: calc(var(--safe-top) + 8px) 16px 8px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.screen-header h1 {
  font-size: 17px;
  font-weight: 600;
  margin: 0;
  flex: 1;
  text-align: center;
}
.screen-header .back,
.screen-header .action {
  background: transparent;
  border: none;
  padding: 8px 4px;
  min-width: 72px;
  color: var(--accent);
}
.screen-header .back { text-align: left; }
.screen-header .action { text-align: right; }
.screen-header .spacer { min-width: 72px; }

.screen-body {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 16px;
}
.screen-body.padded-bottom { padding-bottom: calc(16px + var(--safe-bottom)); }

.screen-footer {
  padding: 12px 16px calc(12px + var(--safe-bottom));
  border-top: 1px solid var(--border);
  background: var(--bg);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.screen-footer button { width: 100%; }

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  min-height: 100%;
  text-align: center;
  color: var(--text-muted);
}
.empty-state h2 { color: var(--text); margin: 0; font-size: 22px; }
.empty-state p { margin: 0; max-width: 300px; line-height: 1.4; }
.empty-state .stack { display: flex; flex-direction: column; gap: 10px; width: 100%; max-width: 280px; }
.empty-state .hero { width: 96px; height: 96px; border-radius: 22px; }
.credit { font-size: 12px; opacity: 0.8; }

.section { margin-bottom: 22px; }
.section h3 {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}
.hint { margin: 8px 0 0; font-size: 13px; line-height: 1.4; color: var(--text-muted); }

.segmented {
  display: flex;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 3px;
  gap: 3px;
}
.segmented button {
  flex: 1;
  border: none;
  background: transparent;
  padding: 8px 4px;
  min-height: 40px;
  font-size: 14px;
  border-radius: 6px;
}
.segmented button.selected { background: var(--accent); color: #1a1a1a; font-weight: 600; }

.frame-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 10px;
}
.frame-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 12px 6px 10px;
  border: 2px solid transparent;
  background: var(--bg-elev);
  border-radius: var(--radius-sm);
}
.frame-card.selected { border-color: var(--accent); }
.frame-shape-box { height: 52px; display: flex; align-items: center; justify-content: center; }
.frame-shape {
  border: 3px solid #c9a36a;
  background: #f3ecdc;
  border-radius: 2px;
}
.frame-card .frame-label { font-size: 14px; font-weight: 600; }
.frame-card .frame-sub { font-size: 11px; color: var(--text-muted); }

/* Crop */
.crop-stage {
  position: relative;
  flex: 1;
  overflow: hidden;
  background: #000;
  touch-action: none;
}
.crop-stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.crop-controls {
  padding: 12px 16px calc(12px + var(--safe-bottom));
  background: var(--bg-elev);
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.crop-info { font-size: 13px; color: var(--text-muted); text-align: center; }

.slider-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-muted);
}
.slider-row label { width: 64px; flex: 0 0 auto; }
.slider-row input { flex: 1; }
.slider-row .value { width: 28px; text-align: right; color: var(--text); font-variant-numeric: tabular-nums; }

/* Pattern */
.preview-wrap {
  position: relative;
  display: flex;
  justify-content: center;
  background: var(--bg-elev);
  border-radius: var(--radius);
  padding: 12px;
  margin-bottom: 12px;
}
.preview-wrap canvas {
  display: block;
  max-width: 100%;
  image-rendering: pixelated;
  background: #fff;
}
.busy {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(26, 26, 26, 0.55);
  border-radius: var(--radius);
}
.busy[hidden] { display: none; }
.summary { font-size: 14px; line-height: 1.5; color: var(--text-muted); margin-bottom: 14px; text-align: center; }
.summary strong { color: var(--text); }

.legend-list { margin-top: 18px; display: flex; flex-direction: column; gap: 2px; }
.legend-row {
  display: grid;
  grid-template-columns: 36px 56px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 6px 4px;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
}
.legend-swatch {
  width: 36px;
  height: 26px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
}
.legend-code { font-weight: 700; }
.legend-name { color: var(--text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.legend-count { font-size: 12px; color: var(--text-muted); text-align: right; font-variant-numeric: tabular-nums; }

/* Export */
.file-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.file-title { font-size: 16px; font-weight: 600; }
.file-desc { font-size: 13px; line-height: 1.4; color: var(--text-muted); }
.file-status { font-size: 13px; color: var(--text); font-variant-numeric: tabular-nums; }
.file-status.error { color: var(--danger); }
.file-actions { display: flex; gap: 8px; }
.file-actions button { flex: 1; }

.toast {
  position: fixed;
  top: calc(var(--safe-top) + 60px);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.85);
  color: #fff;
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 14px;
  z-index: 10;
  pointer-events: none;
  opacity: 0;
  transition: opacity 200ms;
}
.toast.show { opacity: 1; }

.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid rgba(255,255,255,0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 800ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.update-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.82);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  padding: 24px;
}
.update-modal-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  width: 100%;
  max-width: 360px;
  text-align: center;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}
.update-modal-card h2 {
  margin: 0 0 8px;
  font-size: 18px;
}
.update-modal-card p {
  margin: 0 0 18px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.4;
}
.update-modal-card button.primary {
  width: 100%;
  min-height: 44px;
}