:root {
  --bg: #0d131a;
  --panel: #16202c;
  --panel-2: #1c2736;
  --border: #1e293b;
  --text: #f1f5f9;
  --text-dim: #94a3b8;
  --accent-tone: #a31a6d;
  --accent-volume: #38bdf8;
  --accent-primary: #a31a6d;
  --danger: #fb7185;
  --ok: #34d399;
  --surface: #16202c;
  --glow-tone: rgba(163, 26, 109, 0.15);
  --glow-volume: rgba(56, 189, 248, 0.12);
  --drawer-space: 0px;
}

[data-theme="light"] {
  --bg: #f8fafc;
  --panel: #ffffff;
  --panel-2: #f1f5f9;
  --border: #e2e8f0;
  --text: #0f172a;
  --text-dim: #475569;
  --accent-tone: #660040;
  --accent-volume: #007a99;
  --accent-primary: #660040;
  --danger: #e11d48;
  --ok: #059669;
  --surface: #ffffff;
  --glow-tone: rgba(102, 0, 64, 0.08);
  --glow-volume: rgba(0, 122, 153, 0.08);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}

.topbar h1 {
  font-size: 1.1rem;
  margin: 0;
  font-weight: 600;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.app-version-badge {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-dim);
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 8px;
  cursor: default;
}

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

.hidden { display: none !important; }

.screen {
  display: none;
  min-height: calc(100vh - 53px);
  padding: 20px;
  align-items: center;
  justify-content: center;
  /* Reserves room for the open config drawer so the centered camera/viz
     layout shifts left into its own empty margin first, instead of the
     fixed-position drawer just overlapping it. */
  padding-right: calc(20px + var(--drawer-space));
  transition: padding-right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.screen.active {
  display: flex;
}

body.drawer-resizing .screen {
  transition: none;
}

/* Loading */
.loading-box, .error-box {
  text-align: center;
  max-width: 420px;
}

.spinner {
  width: 42px;
  height: 42px;
  margin: 0 auto 16px;
  border: 4px solid var(--border);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.error-icon { font-size: 2.5rem; margin: 0; }
.error-box h2 { margin: 8px 0; }
.error-box p#error-message { color: var(--text-dim); margin-bottom: 20px; }

/* Buttons */
.btn {
  font-family: inherit;
  font-size: 0.9rem;
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s, opacity 0.15s;
}

.btn:hover { background: #1c2736; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-primary {
  color: white;
}

[data-theme="light"] .btn-primary { background: #007a99; border-color: #007a99; color: #fff; }
[data-theme="light"] .btn-primary:hover { background: #e9ecef; border-color: #e9ecef; color: #0f172a; }

[data-theme="dark"] .btn-primary { background: #38bdf8; border-color: #38bdf8; color: #0d131a; }
[data-theme="dark"] .btn-primary:hover { background: #5cccf9; border-color: #5cccf9; }

.btn-large { padding: 14px 28px; font-size: 1rem; width: 100%; }

.btn-ghost { background: transparent; }

.btn-icon {
  font-size: 1.2rem;
  padding: 8px 12px;
  line-height: 1;
}
.btn-icon[aria-pressed="true"] {
  border-color: var(--danger);
  color: var(--danger);
}

/* Setup layout */
.setup-layout {
  display: flex;
  gap: 24px;
  max-width: 1100px;
  width: 100%;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: center;
}

#btn-setup-config { margin-bottom: 12px; }

.camera-wrap {
  position: relative;
  width: 100%;
  max-width: 760px;
  aspect-ratio: 4 / 3;
  background: #000;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border);
  transform: scaleX(-1); /* mirror for natural selfie view */
}

.camera-wrap video,
.camera-wrap canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.label-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  transform: scaleX(-1); /* counter-mirror the parent so labels/badges read correctly */
}

.hand-label {
  position: absolute;
  transform: translate(-50%, -140%);
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

.hand-label.tone { background: var(--accent-tone); color: #003140; }
.hand-label.volume { background: var(--accent-volume); color: #3d0026; }
.hand-label.volume.fist-muted {
  background: var(--danger);
  color: #2b0010;
  box-shadow: 0 0 0 2px rgba(255, 84, 112, 0.5), 0 2px 8px rgba(0,0,0,0.4);
}

.setup-panel {
  flex: 1;
  min-width: 280px;
  max-width: 380px;
}

.setup-panel h2 { margin-top: 0; }

.hint { color: var(--text-dim); font-size: 0.9rem; line-height: 1.4; }
.hint.small { font-size: 0.8rem; margin-top: 8px; }

.calib-progress {
  height: 6px;
  margin-top: 8px;
  border-radius: 999px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  overflow: hidden;
  opacity: 0;
  transition: opacity 0.2s;
}

.calib-progress.visible { opacity: 1; }

.calib-progress-fill {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: var(--ok);
  transition: width 0.1s linear;
}

.hands-swap {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin: 18px 0;
}

.hand-slot {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.hand-slot .hand-img {
  max-height: 160px;
  width: auto;
  object-fit: contain;
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 6px;
}

.hand-slot .badge {
  font-size: 0.8rem;
}

.role-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.role-icon {
  font-size: 1.8rem;
  line-height: 1;
}

.role-text {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 2px 10px;
  border-radius: 999px;
}

.role-label.role-tone .role-text { background: var(--accent-tone); color: #fff; }
.role-label.role-volume .role-text { background: var(--accent-volume); color: #fff; }

.btn-swap {
  background: var(--panel-2);
  border: 2px solid var(--border);
  color: var(--text);
  font-size: 1.6rem;
  padding: 10px 20px;
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: border-color 0.15s, background 0.15s, transform 0.15s;
  font-family: inherit;
  align-self: center;
  margin-top: -20px;
}

.btn-swap:hover {
  border-color: var(--accent-volume);
  background: var(--panel);
  transform: scale(1.05);
}

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}
.badge-tone { background: var(--accent-tone); color: #003140; }
.badge-volume { background: var(--accent-volume); color: #3d0026; }

/* Config drawer */
.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 90;
  transition: opacity 0.25s;
}

.drawer-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.config-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 460px;
  max-width: 90vw;
  height: 100%;
  background: var(--panel);
  border-left: 1px solid var(--border);
  z-index: 100;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.config-drawer.open {
  transform: translateX(0);
}

.drawer-resize-handle {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 14px;
  cursor: ew-resize;
  touch-action: none;
  z-index: 5;
}

.drawer-resize-handle::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 4px;
  height: 44px;
  border-radius: 4px;
  background: var(--border);
  transition: background 0.15s;
}

.drawer-resize-handle:hover::after,
.config-drawer.resizing .drawer-resize-handle::after {
  background: var(--accent-primary);
}

.config-drawer.resizing {
  user-select: none;
  cursor: ew-resize;
}

.donate-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-dim);
  font-size: 0.85rem;
  text-decoration: none;
  opacity: 0.85;
  transition: color 0.15s, opacity 0.15s;
}

.donate-link:hover {
  color: var(--text);
  opacity: 1;
  text-decoration: underline;
}

.about-license {
  margin-top: 14px;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}

.about-description {
  margin: 0 0 8px;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.about-copyright {
  margin: 0 0 6px;
  font-size: 0.78rem;
  color: var(--text-dim);
}

.about-license-notice {
  margin: 0 0 8px;
  font-style: italic;
  font-size: 0.8rem;
  color: var(--text);
}

.about-legal-scroll {
  max-height: 200px;
  overflow-y: auto;
  font-size: 0.75rem;
  line-height: 1.45;
  opacity: 0.8;
  color: var(--text-dim);
}

.about-legal-scroll a {
  color: var(--accent-primary);
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.drawer-header h2 { margin: 0; }

.drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}

.drawer-body .hint { margin-bottom: 16px; }

.config-group {
  margin: 22px 0;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

.config-group h3 {
  margin: 0 0 12px;
  font-size: 0.95rem;
  font-weight: 600;
}

.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  padding: 0;
  margin: 0 0 12px;
  background: none;
  border: none;
  font: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  text-align: left;
}

.accordion-header:hover { color: var(--accent-primary); }

.accordion-chevron {
  font-size: 0.7rem;
  opacity: 0.55;
  transition: transform 0.2s ease;
}

.config-group.open .accordion-chevron { transform: rotate(180deg); }

.accordion-body { display: grid; gap: 4px; }

.instructions-list {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 10px;
  color: var(--text-dim);
  font-size: 0.85rem;
  line-height: 1.5;
}

.instructions-list strong { color: var(--text); font-weight: 600; }

.config-group:not(.open) .accordion-body { display: none; }

/* Per-effect mini-accordion (inside "Efectos"): the switch enables/disables,
   the header (chevron + name) expands/collapses the params — independent
   siblings, not nested, so clicking one never triggers the other. */
.fx-item {
  padding: 10px 0;
  border-top: 1px solid var(--border);
}

.fx-item:first-child { border-top: none; padding-top: 0; }

.fx-item-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.fx-header {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  padding: 4px 0;
  background: none;
  border: none;
  font: inherit;
  font-size: 0.85rem;
  color: var(--text);
  cursor: pointer;
  text-align: left;
}

.fx-header:hover { color: var(--accent-primary); }

.fx-header .fx-chevron {
  font-size: 0.7rem;
  opacity: 0.55;
  transition: transform 0.2s ease;
}

.fx-item.open .fx-chevron { transform: rotate(180deg); }

.fx-body {
  display: none;
  margin-top: 4px;
  padding-left: 18px;
}

.fx-item.open .fx-body { display: block; }

.fx-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}

.fx-preset-btn {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
  font-family: inherit;
  font-size: 0.75rem;
  cursor: pointer;
}

.fx-preset-btn:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #fff;
}

.config-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 10px 0;
  font-size: 0.85rem;
}

.config-row label {
  flex: 1;
  min-width: 140px;
  color: var(--text-dim);
}

.config-row input[type="range"] {
  flex: 2;
  min-width: 120px;
  accent-color: var(--accent-primary);
}

.config-row select {
  flex: 2;
  min-width: 120px;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 8px;
  font-family: inherit;
}

.config-row input[type="text"] {
  flex: 2;
  min-width: 120px;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 8px;
  font-family: inherit;
}

.config-row-presets { gap: 8px; }
.config-row-presets #btn-preset-save { flex: none; white-space: nowrap; }

.preset-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.preset-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.83rem;
}

.preset-item .preset-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.preset-item button {
  flex: none;
  font-family: inherit;
  font-size: 0.75rem;
  padding: 5px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
}

.preset-item .btn-preset-load:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.preset-item .btn-preset-delete:hover {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

.preset-empty {
  margin: 12px 0 0;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.config-row-chords {
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 6px 12px;
}

.config-row-chords .chord-buttons {
  flex: 1 1 100%;
}

.config-row-chords.disabled .chord-btn {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-mode-toggle {
  flex: 2;
  min-width: 120px;
}

.config-row .readout {
  min-width: 86px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--text);
}

/* Toggle switch */
.toggle {
  flex: none;
  width: 46px;
  height: 26px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  position: relative;
  cursor: pointer;
  padding: 0;
  transition: background 0.15s, border-color 0.15s;
}

.toggle .toggle-knob {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--text-dim);
  transition: transform 0.15s, background 0.15s;
}

.toggle[aria-checked="true"] {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
}

.toggle[aria-checked="true"] .toggle-knob {
  transform: translateX(20px);
  background: #fff;
}

.config-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.config-actions .btn { flex: 1; }

/* Play layout */
.play-layout {
  display: flex;
  gap: 16px;
  width: 100%;
  max-width: 1300px;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: center;
}

#play-camera-wrap { max-width: 860px; }

.note-readout {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%) scaleX(-1); /* counter mirror parent flip */
  background: rgba(0,0,0,0.55);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  backdrop-filter: blur(4px);
}

.viz-panel {
  flex: 1;
  min-width: 280px;
  max-width: 560px;
  aspect-ratio: 4 / 3;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}

.viz-panel canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.controls-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 12px 20px;
  background: var(--panel);
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.control {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.control select, .control input[type="range"] {
  accent-color: var(--accent-primary);
}

.control select {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 8px;
  font-family: inherit;
}

.control select:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.control-chords {
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
}

.control-register {
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}

.register-bars {
  display: flex;
  align-items: flex-end;
  gap: 6px;
}

.register-bar {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
  font-family: inherit;
  color: var(--text-dim);
  font-size: 0.72rem;
}

.register-bar .bar-fill {
  display: block;
  width: 30px;
  border-radius: 6px 6px 2px 2px;
  transition: filter 0.15s, box-shadow 0.15s;
  filter: saturate(0.55) brightness(0.8);
}

.register-bar[data-register="grave"] .bar-fill { height: 14px; background: #facc15; }
.register-bar[data-register="normal"] .bar-fill { height: 26px; background: #4ade80; }
.register-bar[data-register="agudo"] .bar-fill { height: 40px; background: #f87171; }
.register-bar[data-register="grave-normal"] .bar-fill { height: 26px; background: linear-gradient(to top, #facc15, #4ade80); }
.register-bar[data-register="normal-agudo"] .bar-fill { height: 40px; background: linear-gradient(to top, #4ade80, #f87171); }

.register-bar.selected .bar-fill {
  filter: none;
  box-shadow: 0 0 0 2px var(--panel), 0 0 0 3.5px var(--accent-primary);
}

.register-bar.selected .bar-label {
  color: var(--text);
  font-weight: 600;
}

.chord-buttons {
  display: flex;
  gap: 4px;
}

.chord-btn {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  font-family: inherit;
  font-size: 0.8rem;
  cursor: pointer;
}

.chord-btn:hover { background: #1c2736; }

.chord-btn.selected {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #fff;
}

.control-chords.disabled .chord-btn {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

.status-pill {
  margin-left: auto;
  font-size: 0.8rem;
  color: var(--text-dim);
  background: var(--panel-2);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 999px;
}

#screen-play.active { padding-bottom: 90px; }

/* Light theme overrides for specific elements */
[data-theme="light"] .topbar {
  background: var(--panel);
  border-bottom-color: var(--border);
}

[data-theme="light"] .controls-bar {
  background: var(--panel);
  border-top-color: var(--border);
}

[data-theme="light"] .btn:hover { background: #e9ecef; }
[data-theme="light"] .btn-swap:hover { background: #e9ecef; }
[data-theme="light"] .chord-btn:hover { background: #e9ecef; }
[data-theme="light"] .note-readout { background: rgba(255,255,255,0.9); color: #0f172a; }
[data-theme="light"] .spinner { border-color: var(--border); border-top-color: var(--accent-primary); }

@media (max-width: 720px) {
  .play-layout, .setup-layout { flex-direction: column; align-items: center; }
  .status-pill { margin-left: 0; }
}