/* ── Animation System Styles ─────────────────────────────────── */

/* Screen shake keyframes */
@keyframes screenShake {
  0%   { transform: translate(0, 0); }
  8%   { transform: translate(0, 10px); }
  16%  { transform: translate(-6px, -4px); }
  24%  { transform: translate(5px, 6px); }
  32%  { transform: translate(-4px, -3px); }
  44%  { transform: translate(3px, 2px); }
  56%  { transform: translate(-2px, -1px); }
  68%  { transform: translate(1px, 1px); }
  80%  { transform: translate(-1px, 0); }
  100% { transform: translate(0, 0); }
}

@keyframes screenShakeHeavy {
  0%   { transform: translate(0, 0); }
  5%   { transform: translate(0, 16px); }
  12%  { transform: translate(-10px, -8px); }
  20%  { transform: translate(8px, 10px); }
  28%  { transform: translate(-6px, -5px); }
  38%  { transform: translate(5px, 4px); }
  50%  { transform: translate(-3px, -2px); }
  65%  { transform: translate(2px, 1px); }
  80%  { transform: translate(-1px, 0); }
  100% { transform: translate(0, 0); }
}

.shaking { animation: screenShake 0.4s ease-out; }
.shaking-heavy { animation: screenShakeHeavy 0.5s ease-out; }

/* Animating item elevation */
.todo-item.animating {
  z-index: 100;
  pointer-events: none;
  position: relative;
  will-change: transform, opacity;
}
/* Keep card visible during thud/lift animations (override .todo-done opacity).
   anim-destroyed removes this override for death animations that hide the card. */
.todo-item.animating.anim-visible {
  opacity: 1 !important;
}
/* Once destroyCard() is called, card stays hidden regardless of inline styles.
   anim-destroyed beats anim-visible because it comes later in source order. */
.todo-item.animating.anim-destroyed {
  opacity: 0 !important;
}

/* Animation stage — body-level 3D perspective wrapper for lifted cards */
.animation-stage {
  contain: layout style paint;
}

/* Canvas overlays */
#animation-canvas {
  position: fixed;
  inset: 0;
  z-index: 9998;
  pointer-events: none;
  contain: layout style;
}

#speed-lines-canvas {
  position: fixed;
  inset: 0;
  z-index: 9996;
  pointer-events: none;
  opacity: 0;
  contain: layout style;
}

/* Impact flash overlay */
#impact-flash-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  pointer-events: none;
  opacity: 0;
}

/* Dotgrid background */
.dotgrid-container {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

.dotgrid {
  position: absolute;
  inset: -40px;
  display: grid;
  grid-template-columns: repeat(var(--cols), 1fr);
  grid-template-rows: repeat(var(--rows), 1fr);
  gap: 0;
  font-size: var(--dot-font-size, 14px);
  line-height: 1;
  color: var(--ink-muted);
  opacity: 0.2;
  user-select: none;
  font-family: monospace;
}

.dot {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--dot-size, 28px);
  height: var(--dot-size, 28px);
}

@media (min-width: 769px) {
  .dot { will-change: transform, opacity, color; }
}

@media (max-width: 768px) {
  .dotgrid { inset: -10px; }
}

/* Done badge overlay */
.done-badge-anim {
  position: fixed;
  z-index: 10001;
  pointer-events: none;
  font-family: var(--font-body, monospace);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--green, #3A7D5C);
  background: var(--green-subtle, rgba(58, 125, 92, 0.1));
  border: 1px solid var(--green, #3A7D5C);
  padding: 6px 18px;
  border-radius: 8px;
  transform: translate(-50%, -50%) scale(0);
  opacity: 0;
}

/* Impact burst glow */
.impact-burst-anim {
  position: fixed;
  z-index: 97;
  pointer-events: none;
  border-radius: 50%;
  opacity: 0;
}

/* ── Settings Page Styles ────────────────────────────────────── */

.settings-shell {
  max-width: 640px;
  margin: 0 auto;
  padding: 36px 20px 72px;
  min-height: 100vh;
}

.settings-back {
  display: inline-block;
  font-size: 13px;
  color: var(--ink-muted);
  text-decoration: none;
  margin-bottom: 24px;
  transition: color var(--dur-fast) var(--ease-out);
}

.settings-back:hover { color: var(--accent); }

.settings-heading {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 2px;
  margin-bottom: 32px;
}

.settings-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}

/* Collapsible sections */
.settings-collapsible { padding: 0; }
.settings-collapse-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px; cursor: pointer; user-select: none;
  font-family: var(--font-display); font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.8px; color: var(--ink-muted);
}
.settings-collapse-header:hover { color: var(--ink); }
.settings-collapse-arrow {
  font-size: 10px; transition: transform 0.2s var(--ease-out);
}
.settings-collapse-header.open .settings-collapse-arrow {
  transform: rotate(90deg);
}
.settings-collapse-body { padding: 0 20px 20px; }

/* Theme grid */
.theme-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}

.theme-card {
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease-out);
  position: relative;
}

.theme-scheme-badge {
  position: absolute;
  top: 6px;
  right: 6px;
  font-size: 9px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 1px 5px;
  border-radius: 3px;
  line-height: 1.4;
}

.theme-scheme-dark {
  background: var(--ink);
  color: var(--surface);
}

.theme-card:hover {
  border-color: var(--ink-muted);
}

.theme-card.active {
  border-color: var(--accent);
  background: var(--accent-subtle);
}

.theme-swatches {
  display: flex;
  gap: 4px;
  margin-bottom: 8px;
}

.theme-swatch {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 1px solid rgba(0, 0, 0, 0.1);
}

.theme-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 2px;
}

.theme-desc {
  font-size: 11px;
  color: var(--ink-muted);
}

.theme-actions {
  display: flex;
  gap: 8px;
}

/* Style/variant pill buttons — shared by FX panel, settings page, sandbox */
.settings-style-btn,
.settings-variant-btn {
  padding: 5px 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--surface);
  color: var(--ink-secondary);
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease-out);
  letter-spacing: 0.2px;
  text-transform: capitalize;
}

.settings-style-btn:hover,
.settings-variant-btn:hover {
  border-color: var(--ink-muted);
  color: var(--ink);
}

.settings-style-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-subtle);
}

.settings-variant-btn.active {
  border-color: var(--green);
  color: var(--green);
  background: var(--green-subtle);
}

/* Preview wrapper */
.settings-preview-wrapper {
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
}

/* Import modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 10001;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  max-width: 480px;
  width: 100%;
  box-shadow: var(--shadow-md);
}

.modal-content h3 {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
}

.modal-hint {
  font-size: 13px;
  color: var(--ink-secondary);
  margin-bottom: 12px;
}

.modal-textarea {
  width: 100%;
  min-height: 200px;
  padding: 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-family: monospace;
  font-size: 12px;
  color: var(--ink);
  background: var(--bg);
  resize: vertical;
  outline: none;
  transition: border-color var(--dur-fast) var(--ease-out);
}

.modal-textarea:focus {
  border-color: var(--accent);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 12px;
}

/* Responsive */
@media (max-width: 720px) {
  .settings-shell {
    padding: 20px 14px 52px;
  }

  .theme-grid {
    grid-template-columns: 1fr 1fr;
  }
}


/* ── Sandbox link on Settings page ── */
.sandbox-link-section {
  text-align: center;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
}

.sandbox-link-btn {
  display: inline-block;
  text-decoration: none;
  padding: 12px 32px;
  font-size: 14px;
}

.sandbox-link-hint {
  font-size: 12px;
  color: var(--ink-muted);
  font-style: italic;
  margin-top: 8px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .shaking,
  .shaking-heavy {
    animation: none !important;
  }
}