/* Fase 1: layout base; Three.js se superpondrá en fases posteriores */

:root {
  color-scheme: dark light;
  --bg: #0f1114;
  --surface: #1a1e24;
  --text: #e8eaed;
  --muted: #9aa0a6;
  --accent: #7cb8ff;
  --radius: 12px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  height: 100%;
}

body {
  margin: 0;
  min-height: 100dvh;
  min-height: 100svh;
  background: var(--bg);
  color: var(--text);
}

.app {
  max-width: 720px;
  margin: 0 auto;
  padding: 1rem;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.app__header {
  margin-bottom: 0.75rem;
}

.app__title {
  margin: 0 0 0.35rem;
  font-size: 1.25rem;
  font-weight: 600;
}

.app__status {
  margin: 0;
  font-size: 0.875rem;
  color: var(--muted);
}

.app__status[data-state="ok"] {
  color: #8fd694;
}

.app__status[data-state="error"] {
  color: #f28b82;
}

.app__main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.viewport {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  aspect-ratio: 4 / 3;
  max-height: min(70dvh, 560px);
}

.viewport__ui-toggle {
  position: absolute;
  top: max(0.5rem, env(safe-area-inset-top));
  right: max(0.5rem, env(safe-area-inset-right));
  z-index: 10;
  padding: 0.45rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text);
  background: rgba(26, 30, 36, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  cursor: pointer;
  pointer-events: auto;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
}

.viewport__ui-toggle:hover {
  background: rgba(36, 42, 50, 0.95);
}

.viewport__ui-toggle[aria-pressed="true"] {
  background: rgba(124, 184, 255, 0.28);
  border-color: rgba(124, 184, 255, 0.55);
  color: #c8e3ff;
}

.hints.is-hidden {
  display: none;
}

/* Mismo espejo X que el vídeo: la matriz facial se calcula sobre el stream sin voltear */
/* Landmarks 2D: el espejo se aplica en coordenadas (1−x), no con CSS, para que el texto no salga invertido */
.viewport__landmarks {
  position: absolute;
  pointer-events: none;
  z-index: 6;
}

.viewport__canvas {
  position: absolute;
  left: 0;
  top: 0;
  display: block;
  pointer-events: none;
  z-index: 5;
  /* Capa compositora propia: en iOS el vídeo nativo suele pintar encima del WebGL si no forzamos capa */
  transform: scaleX(-1) translateZ(0);
  -webkit-transform: scaleX(-1) translateZ(0);
  -webkit-backface-visibility: hidden;
  /* width/height se fijan en JS para coincidir con el vídeo en object-fit: contain */
}

.viewport__video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #0a0c0f;
  transform: scaleX(-1);
  display: block;
  position: relative;
  z-index: 1;
}

.glasses-picker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  flex-shrink: 0;
  padding: 0.5rem 0.65rem;
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.glasses-picker__label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--muted);
  white-space: nowrap;
}

.glasses-picker__select {
  flex: 1;
  min-width: 0;
  padding: 0.5rem 0.65rem;
  font-size: 0.9rem;
  color: var(--text);
  background: #12161c;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%239aa0a6' d='M3 4.5 6 8l3-3.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.65rem center;
  padding-right: 2rem;
}

.glasses-picker__select:focus {
  outline: 2px solid rgba(124, 184, 255, 0.45);
  outline-offset: 2px;
}

.glasses-picker__btn {
  flex-shrink: 0;
  padding: 0.5rem 0.85rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text);
  background: rgba(124, 184, 255, 0.18);
  border: 1px solid rgba(124, 184, 255, 0.45);
  border-radius: 8px;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.glasses-picker__btn:hover {
  background: rgba(124, 184, 255, 0.28);
}

.calibration-dialog {
  max-width: min(100vw - 2rem, 420px);
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.45);
}

.calibration-dialog::backdrop {
  background: rgba(0, 0, 0, 0.55);
}

.calibration-dialog__panel {
  padding: 1rem 1.1rem 1.1rem;
}

.calibration-dialog__title {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 600;
}

.calibration-dialog__intro {
  margin: 0 0 0.75rem;
  font-size: 0.8125rem;
  color: var(--muted);
  line-height: 1.45;
}

.calibration-dialog__refs {
  margin: 0 0 0.85rem;
  padding: 0;
  border: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.calibration-dialog__option {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.25rem 0.5rem;
  align-items: start;
}

.calibration-dialog__option input {
  margin-top: 0.2rem;
}

.calibration-dialog__option label {
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
}

.calibration-dialog__hint {
  grid-column: 2;
  margin: 0;
  font-size: 0.75rem;
  color: var(--muted);
  line-height: 1.35;
}

.calibration-dialog__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.calibration-dialog__primary {
  padding: 0.45rem 0.85rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: #0f1114;
  background: var(--accent);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  touch-action: manipulation;
}

.calibration-dialog__secondary {
  padding: 0.45rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text);
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  cursor: pointer;
  touch-action: manipulation;
}

.calibration-dialog__result {
  margin: 0.5rem 0 0;
  font-size: 0.8125rem;
  line-height: 1.4;
  color: #8fd694;
}

.calibration-dialog__result[data-state="error"] {
  color: #f28b82;
}

.calibration-measure {
  position: absolute;
  inset: 0;
  z-index: 25;
  box-sizing: border-box;
  padding: 0.75rem;
  background: rgba(10, 12, 15, 0.42);
  cursor: crosshair;
  touch-action: none;
  -webkit-tap-highlight-color: transparent;
}

.calibration-measure__hint {
  margin: 0 0 0.35rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text);
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.8);
  pointer-events: none;
}

.calibration-measure__sub {
  margin: 0 0 0.5rem;
  font-size: 0.75rem;
  color: rgba(232, 234, 237, 0.92);
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.8);
  pointer-events: none;
}

.calibration-measure__cancel {
  position: relative;
  z-index: 2;
  padding: 0.4rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text);
  background: rgba(26, 30, 36, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  cursor: pointer;
  touch-action: manipulation;
}

.calibration-measure__svg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

.calibration-measure--review {
  cursor: default;
}

.calibration-measure__review {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 3;
  padding: 0.65rem 0.75rem 0.85rem;
  background: linear-gradient(transparent, rgba(10, 12, 15, 0.94) 18%);
  pointer-events: auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.calibration-measure__review[hidden] {
  display: none !important;
}

.calibration-measure__stats {
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.45;
  color: rgba(232, 234, 237, 0.95);
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.85);
}

.calibration-measure__stats strong {
  color: var(--accent);
  font-weight: 600;
}

.calibration-measure__review-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.calibration-measure__confirm {
  padding: 0.45rem 0.85rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: #0f1114;
  background: var(--accent);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  touch-action: manipulation;
}

.calibration-measure__repeat {
  padding: 0.45rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text);
  background: rgba(26, 30, 36, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  cursor: pointer;
  touch-action: manipulation;
}

.hints {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
}

.hints__text {
  margin: 0;
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.45;
}

/* Teléfono: sin caja 4∶3; el área de cámara + overlay usa todo el alto disponible */
@media (max-width: 768px) {
  .app__header {
    flex-shrink: 0;
  }

  .app {
    max-width: none;
    width: 100%;
    margin: 0;
    min-height: 100dvh;
    min-height: 100svh;
    height: 100dvh;
    height: 100svh;
    padding: max(0.5rem, env(safe-area-inset-top)) max(0.5rem, env(safe-area-inset-right))
      max(0.5rem, env(safe-area-inset-bottom)) max(0.5rem, env(safe-area-inset-left));
  }

  .app__title {
    font-size: 1.05rem;
  }

  .app__main {
    flex: 1 1 auto;
    min-height: 0;
    gap: 0.5rem;
  }

  .viewport {
    flex: 1 1 auto;
    min-height: 240px;
    width: 100%;
    aspect-ratio: unset;
    max-height: none;
    border-radius: 10px;
  }

  .viewport__ui-toggle {
    top: max(0.4rem, env(safe-area-inset-top));
    right: max(0.4rem, env(safe-area-inset-right));
  }

  .hints {
    flex-shrink: 0;
    padding: 0.6rem 0.85rem;
  }
}