:root {
  --cyan: #00e5ff;
  --cyan-dim: rgba(0, 229, 255, 0.2);
  --white: #ffffff;
  --deep-space: #001219;
  --dark-panel: #001f2b;
  --border-color: #003344;
  --alert-red: #ff3333;
  --amber: #ffaa00;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--deep-space);
  color: var(--white);
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px;
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: 1600px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  border-bottom: 1px solid var(--cyan);
  padding-bottom: 16px;
  margin-bottom: 24px;
}

/* ── Language Toggle ───────────────────────────────── */
.lang-toggle {
  align-self: center;
  background: transparent;
  border: 1px solid rgba(0, 229, 255, 0.35);
  color: rgba(0, 229, 255, 0.7);
  padding: 5px 13px;
  font-family: "Courier New", monospace;
  font-size: 11px;
  letter-spacing: 1.5px;
  cursor: pointer;
  border-radius: 2px;
  transition:
    border-color 0.2s,
    color 0.2s,
    background 0.2s;
  line-height: 1;
  user-select: none;
}

.lang-toggle:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(0, 229, 255, 0.07);
}

.lang-toggle:active {
  background: rgba(0, 229, 255, 0.18);
}

.header-title {
  font-size: 24px;
  font-weight: bold;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 4px;
}

.header-subtitle {
  font-size: 14px;
  opacity: 0.7;
}

div#action {
  /* grid-template-rows: 2fr, 1; */
  display: flex;
  flex-direction: row;
  justify-content: flex-start;
  flex-wrap: wrap;
  align-items: center;
  padding: 16px 0;
  width: 100%;
}

.section-title {
  font-size: 20px;
  font-weight: bold;
  /* margin-bottom: 16px; */
  padding-left: 16px;
  border-left: 4px solid var(--cyan);
  width: 50%;
}

.player-container {
  position: relative;
  width: 100%;
  aspect-ratio: 2.39 / 1;
  background-color: #000;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid #333;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
  /* margin-bottom: 16px; */
}

/* Pseudo-Fullscreen Fallback Class for iframe permissions blocking */
.player-container.fullscreen-fallback {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  width: 100vw !important;
  height: var(--app-height, 100vh) !important;
  z-index: 99999 !important;
  max-width: none !important;
  border-radius: 0 !important;
  margin: 0 !important;
}

#three-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.overlay-top,
.overlay-bottom {
  position: absolute;
  width: 100%;
  left: 0;
  pointer-events: none;
}

.overlay-top {
  top: 0;
  height: 60px;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent);
  z-index: 5;
}

.overlay-bottom {
  bottom: 0;
  height: 80px;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.9), transparent);
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding: 8px 12px;
  z-index: 5;
}

.time-display {
  font-family: monospace;
  font-size: 12px;
  color: var(--cyan);
}

.scene-title {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 2px;
  opacity: 0.8;
}

.action-text-container {
  position: absolute;
  bottom: 8px;
  left: 0;
  width: 100%;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  pointer-events: none;
  padding: 0 88px;
  text-align: center;
  z-index: 10;
}

.action-text {
  font-size: 12px;
  font-weight: 400;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.95);
  color: var(--white);
  max-width: 80%;
  background: rgba(0, 18, 25, 0.75);
  padding: 4px 8px;
  border-radius: 6px;
  border: 1px solid rgba(0, 229, 255, 0.3);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

/* Fullscreen Overlay Controller */
.overlay-controls {
  position: absolute;
  top: 16px;
  left: 16px;
  display: flex;
  gap: 8px;
  z-index: 25;
  pointer-events: auto;
}

.overlay-ctrl-btn {
  background: rgba(0, 18, 25, 0.85);
  border: 1px solid var(--cyan);
  color: var(--cyan);
  padding: 6px 14px;
  font-size: 11px;
  font-weight: bold;
  text-transform: uppercase;
  border-radius: 4px;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  transition: all 0.2s ease-in-out;
  letter-spacing: 1px;
}

.overlay-ctrl-btn:hover {
  background: var(--cyan);
  color: var(--deep-space);
  box-shadow: 0 0 10px var(--cyan);
}

.fullscreen-btn {
  position: absolute;
  right: 16px;
  top: 16px;
  background: rgba(0, 18, 25, 0.75);
  border: 1px solid var(--border-color);
  color: var(--cyan);
  border-radius: 4px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  touch-action: manipulation;
  z-index: 20;
  transition:
    background 0.2s,
    border-color 0.2s,
    color 0.2s;
}

.fullscreen-btn:hover {
  background: var(--cyan);
  color: var(--deep-space);
  border-color: var(--white);
}

.prompts-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (max-width: 768px) {
  .prompts-grid {
    grid-template-columns: 1fr 1fr;
  }

  /* div#action {
    flex-direction: row;
  } */
  .player-container {
    aspect-ratio: 1.15 / 1;
  }
}

/* Large screens: 1200px+ */
@media (min-width: 1200px) {
  body {
    padding: 40px;
  }
  .header-title {
    font-size: 30px;
    letter-spacing: 4px;
  }
  .header-subtitle {
    font-size: 15px;
  }
  .time-display {
    font-size: 12px;
  }
  .scene-title {
    font-size: 15px;
  }
  .action-text {
    font-size: 11px;
  }
  .section-title {
    font-size: 24px;
    /* margin-bottom: 20px; */
  }
  .prompt-title {
    font-size: 15px;
  }
  .prompt-text {
    font-size: 14px;
  }
  .prompts-grid {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 12px;
  }
  .prompt-card {
    padding: 8px;
  }
}

/* 4K / Ultra-wide screens: 1800px+ */
@media (min-width: 1800px) {
  body {
    padding: 56px;
  }
  .header-title {
    font-size: 40px;
    letter-spacing: 6px;
  }
  .header-subtitle {
    font-size: 18px;
  }
  .time-display {
    font-size: 12px;
  }
  .scene-title {
    font-size: 18px;
  }
  .action-text {
    font-size: 12px;
    padding: 6px 14px;
  }
  .section-title {
    font-size: 32px;
    /* margin-bottom: 28px; */
  }
  .prompt-title {
    font-size: 18px;
    margin-bottom: 10px;
  }
  .prompt-text {
    font-size: 16px;
  }
  .prompts-grid {
    gap: 12px;
  }
  .prompt-card {
    padding: 8px;
  }
  .overlay-ctrl-btn {
    font-size: 14px;
    padding: 8px 20px;
  }
  .overlay-bottom {
    padding: 8px 12px;
  }
}

.prompt-card {
  background-color: var(--dark-panel);
  border: 1px solid var(--border-color);
  padding: 8px;
  border-radius: 6px;
  cursor: pointer;
  touch-action: manipulation;
  transition:
    transform 0.2s,
    border-color 0.2s,
    box-shadow 0.2s;
}

.prompt-card:hover {
  transform: translateY(-2px);
  border-color: var(--cyan);
}

.prompt-card.active {
  border-color: var(--white);
  box-shadow: 0 0 15px var(--cyan-dim);
  background-color: rgba(0, 229, 255, 0.05);
}

.prompt-title {
  color: var(--cyan);
  font-size: 14px;
  font-weight: bold;
  margin-bottom: 8px;
}

.prompt-text {
  font-size: 14px;
  color: #ccc;
  line-height: 1.5;
}

#webgl-error {
  display: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--cyan);
  text-align: center;
  font-family: monospace;
  padding: 20px 24px;
  background: rgba(0, 18, 25, 0.95);
  border: 1px solid var(--cyan);
  border-radius: 8px;
  z-index: 100;
  line-height: 2;
}

#webgl-error span {
  font-size: 12px;
  color: #ccc;
}

/* Utility for UI glitch */
.ui-glitch {
  color: var(--alert-red) !important;
  animation: glitch-text 0.2s infinite;
}

@keyframes glitch-text {
  0% {
    transform: translate(0);
  }
  25% {
    transform: translate(-2px, 1px);
  }
  50% {
    transform: translate(2px, -1px);
  }
  75% {
    transform: translate(-1px, -2px);
  }
  100% {
    transform: translate(0);
  }
}

/* ── Loading overlay ───────────────────────────────────────────── */
#loadingOverlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: #000d14;
  z-index: 100;
  transition: opacity 0.6s ease;
}
#loadingOverlay.hidden {
  opacity: 0;
  pointer-events: none;
}
#loadingLabel {
  font-family: "Courier New", monospace;
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  color: #00e5ff;
  opacity: 0.7;
}
#loadingBarTrack {
  width: min(280px, 60%);
  height: 3px;
  background: rgba(0, 229, 255, 0.15);
  border-radius: 2px;
  overflow: hidden;
}
#loadingBarFill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #00e5ff, #0077ff);
  border-radius: 2px;
  transition: width 0.3s ease;
}
#loadingPercent {
  font-family: "Courier New", monospace;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: rgba(0, 229, 255, 0.5);
}