/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0f1117;
  --surface:   #1a1d2e;
  --border:    #2a2d3e;
  --gold:      #EF9F27;
  --gold-dim:  #BA7517;
  --text:      #e8e8f0;
  --text-dim:  #7a7a9a;
  --green:     #4caf50;
  --red:       #f44336;
  --radius:    8px;
  --header-h:  56px;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  overflow: hidden;
}

/* ── Loading screen ── */
#loading-screen {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  transition: opacity 0.4s;
}

#loading-screen.fade-out {
  opacity: 0;
  pointer-events: none;
}

.loader-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.loader-ring {
  width: 52px;
  height: 52px;
  border: 3px solid var(--border);
  border-top-color: var(--gold);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

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

#loading-text {
  font-size: 14px;
  color: var(--gold-dim);
  letter-spacing: 0.5px;
}

/* ── Utility ── */
.hidden { display: none !important; }

/* ── App shell ── */
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}
#app.hidden { display: none; }

/* ── Header ── */
header {
  height: var(--header-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
}

.logo {
  font-size: 15px;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: 0.3px;
}

/* ── Tabs ── */
.tabs { display: flex; gap: 6px; }

.tab-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-dim);
  font-size: 13px;
  padding: 6px 14px;
  cursor: pointer;
  transition: all 0.15s;
}

.tab-btn:hover {
  border-color: var(--gold-dim);
  color: var(--text);
}

.tab-btn.active {
  background: var(--gold);
  border-color: var(--gold);
  color: #000;
  font-weight: 600;
}

/* ── Panels ── */
.panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.panel.hidden { display: none; }
.panel.active { display: flex; }

/* ── AR Viewport ── */
.ar-viewport {
  flex: 1;
  position: relative;
  background: #000;
  overflow: hidden;
}

.ar-canvas {
  position: absolute;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
}
.ar-canvas.overlay { pointer-events: none; }

.ar-viewport a-scene {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

/* ── Face hint overlay ── */
.hint-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  transition: opacity 0.3s;
}

.hint-overlay p {
  background: rgba(0,0,0,0.55);
  border: 1px solid var(--gold-dim);
  border-radius: var(--radius);
  color: var(--gold);
  font-size: 14px;
  padding: 10px 18px;
  letter-spacing: 0.3px;
}

.hint-overlay.hidden { opacity: 0; }

/* ── Controls bar ── */
.controls {
  height: 52px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 16px;
  flex-shrink: 0;
}

.controls label {
  font-size: 12px;
  color: var(--text-dim);
  white-space: nowrap;
}

.controls select {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 13px;
  padding: 5px 10px;
  cursor: pointer;
  outline: none;
  transition: border-color 0.15s;
}
.controls select:hover,
.controls select:focus { border-color: var(--gold-dim); }

/* ── Status dot ── */
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-dim);
  flex-shrink: 0;
  margin-left: auto;
}
.status-dot.green { background: var(--green); }
.status-dot.amber { background: var(--gold); }
.status-dot.red   { background: var(--red); }

#face-status-text,
#image-status-text {
  font-size: 12px;
  color: var(--text-dim);
  white-space: nowrap;
}

/* ═══════════════════════════════════════════
   TARGET SLIDER
   Centered overlay on the AR viewport
═══════════════════════════════════════════ */
.target-slider {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  z-index: 10;
  gap: 12px;
}

/* Card */
.slider-card {
  position: relative;
  width: 200px;
  background: rgba(10, 10, 20, 0.75);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  pointer-events: all;
  backdrop-filter: blur(6px);
  transition: border-color 0.3s;
}

.slider-card.not-detectable {
  border-color: rgba(244, 67, 54, 0.5);
}

/* Label badge */
.slider-label {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 2;
  text-align: center;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.4px;
  padding: 5px 8px;
  text-transform: uppercase;
}

.slider-label.detectable {
  background: rgba(76, 175, 80, 0.85);
  color: #fff;
}

.slider-label.not-detectable {
  background: rgba(244, 67, 54, 0.85);
  color: #fff;
}

/* Target image */
.slider-img {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  margin-top: 28px; /* leave room for label */
}

/* "Not Antoni Gaudí" overlay on the image */
.not-gaudi-overlay {
  position: absolute;
  inset: 28px 0 0 0; /* below the label */
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(244, 67, 54, 0.55);
  z-index: 3;
}

.not-gaudi-overlay span {
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  text-align: center;
  padding: 0 8px;
  text-shadow: 0 1px 4px rgba(0,0,0,0.7);
  letter-spacing: 0.2px;
}

/* Circular countdown timer — bottom-right corner of card */
.slider-timer {
  position: absolute;
  bottom: 6px;
  right: 6px;
  width: 32px;
  height: 32px;
  z-index: 4;
}

.timer-svg {
  width: 32px;
  height: 32px;
  transform: rotate(-90deg);
}

.timer-track {
  fill: none;
  stroke: rgba(255,255,255,0.15);
  stroke-width: 3;
}

.timer-fill {
  fill: none;
  stroke: var(--gold);
  stroke-width: 3;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.9s linear;
}

#timer-count {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 700;
  color: var(--gold);
  pointer-events: none;
}

/* Dot indicators */
.slider-dots {
  display: flex;
  gap: 6px;
  pointer-events: all;
}

.slider-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,0.25);
  cursor: pointer;
  padding: 0;
  transition: background 0.2s, transform 0.2s;
}

.slider-dot.active {
  background: var(--gold);
  transform: scale(1.3);
}

/* ── Face AR top bar ── */
.face-top-bar {
  height: 52px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 16px;
  flex-shrink: 0;
}

.face-top-bar label {
  font-size: 12px;
  color: var(--text-dim);
  white-space: nowrap;
}

.face-top-bar select {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 13px;
  padding: 5px 10px;
  cursor: pointer;
  outline: none;
  transition: border-color 0.15s;
}
.face-top-bar select:hover,
.face-top-bar select:focus { border-color: var(--gold-dim); }

.face-top-bar .status-dot { margin-left: auto; }

/* ── Face AR square viewport wrapper ── */
.face-viewport-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  padding: 16px;
}

.face-square {
  width: min(80vw, 80vh);
  height: min(80vw, 80vh);
  flex: none;
  border-radius: 16px;
  overflow: hidden;
  border: 2px solid var(--border);
}

/* ── Desktop: bigger slider for easier scanning ── */
@media (min-width: 768px) {
  .slider-card { width: 340px; }
  .slider-label { font-size: 13px; padding: 7px 10px; }
  .slider-img { margin-top: 36px; }
  .not-gaudi-overlay { inset: 36px 0 0 0; }
  .not-gaudi-overlay span { font-size: 16px; }
}

/* ── Mobile ── */
@media (max-width: 480px) {
  .logo { font-size: 13px; }
  .tab-btn { font-size: 12px; padding: 5px 10px; }
  .controls { gap: 8px; padding: 0 10px; }
  .slider-card { width: 160px; }
}