/* GARGANTUA — UI styling. Dark cinematic theme, monospace accents. */

:root {
  --bg: #000;
  --panel-bg: rgba(10, 11, 15, 0.78);
  --panel-border: rgba(255, 180, 84, 0.18);
  --text: #e8e6df;
  --text-dim: #8b8a84;
  --accent: #ffb454;
  --accent-soft: rgba(255, 180, 84, 0.14);
  --info: #6fc3df;
  --danger: #ff6b5e;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
}

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

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  -webkit-font-smoothing: antialiased;
}

#gl {
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  display: block;
  touch-action: none;
}

/* ---------------- HUD top ---------------- */
.hud-top {
  position: fixed; top: 0; left: 0; right: 0;
  display: flex; justify-content: space-between; align-items: flex-start;
  padding: 14px 18px;
  pointer-events: none;
  z-index: 10;
  background: linear-gradient(180deg, rgba(0,0,0,0.55), transparent);
}

.brand h1 {
  font-size: 20px;
  letter-spacing: 0.42em;
  font-weight: 600;
  color: var(--text);
  text-shadow: 0 0 18px rgba(255, 180, 84, 0.35);
}
.brand .sub {
  display: block;
  margin-top: 3px;
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--text-dim);
  text-transform: uppercase;
}

.chips {
  display: flex; flex-wrap: wrap; gap: 6px;
  justify-content: flex-end;
  max-width: 60vw;
}
.chip {
  font-size: 10px;
  letter-spacing: 0.08em;
  padding: 4px 9px;
  border: 1px solid rgba(232, 230, 223, 0.16);
  border-radius: 3px;
  background: var(--panel-bg);
  backdrop-filter: blur(8px);
  color: var(--text-dim);
  white-space: nowrap;
}
.chip.active { color: var(--accent); border-color: var(--panel-border); }

/* ---------------- panel ---------------- */
.panel {
  position: fixed;
  top: 64px; right: 14px; bottom: 64px;
  width: 300px;
  display: flex; flex-direction: column;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  backdrop-filter: blur(14px);
  z-index: 20;
  transition: transform 0.28s ease, opacity 0.28s ease;
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.55);
}
.panel.collapsed {
  transform: translateX(calc(100% + 24px));
  opacity: 0;
  pointer-events: none;
}

.panel-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid rgba(232, 230, 223, 0.1);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--accent);
}
.panel-head .hint { color: var(--text-dim); letter-spacing: 0.08em; font-size: 10px; }

.panel-scroll { flex: 1; overflow-y: auto; overscroll-behavior: contain; }
.panel-scroll::-webkit-scrollbar { width: 6px; }
.panel-scroll::-webkit-scrollbar-thumb { background: rgba(255,180,84,0.25); border-radius: 3px; }

.panel-body { padding: 12px 14px 16px; }
.panel-body section { margin-bottom: 18px; }
.panel-body h3 {
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--info);
  margin: 14px 0 8px;
  text-transform: uppercase;
}
.panel-body section > h3:first-child { margin-top: 0; }
.hint { font-size: 9px; color: var(--text-dim); letter-spacing: 0.1em; }

.btn-row { display: flex; gap: 6px; flex-wrap: wrap; }

.btn {
  flex: 1 1 auto;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  padding: 7px 8px;
  color: var(--text);
  background: rgba(232, 230, 223, 0.05);
  border: 1px solid rgba(232, 230, 223, 0.16);
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  white-space: nowrap;
}
.btn:hover { background: var(--accent-soft); border-color: var(--panel-border); }
.btn.active {
  color: #0a0a0c;
  background: var(--accent);
  border-color: var(--accent);
  font-weight: 700;
}
.btn.wide { flex-basis: 100%; }
.btn.danger:hover { color: var(--danger); border-color: var(--danger); background: rgba(255,107,94,0.08); }

.icon-btn {
  font-family: var(--mono);
  font-size: 14px;
  background: none; border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 0 2px;
  line-height: 1;
}
.icon-btn:hover { color: var(--accent); }

.vol-wrap {
  flex: 1 1 90px;
  display: flex; align-items: center; gap: 7px;
  font-size: 9px; color: var(--text-dim);
  letter-spacing: 0.1em;
}
.vol-wrap input { flex: 1; min-width: 60px; }

/* sliders */
.slider-row { margin-bottom: 11px; }
.slider-label-row {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 4px;
}
.slider-label-row label { font-size: 10.5px; color: var(--text); letter-spacing: 0.04em; }
.slider-val { font-size: 10px; color: var(--accent); letter-spacing: 0.04em; }

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 3px;
  background: rgba(232, 230, 223, 0.18);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid #0a0a0c;
  box-shadow: 0 0 8px rgba(255, 180, 84, 0.5);
}
input[type="range"]::-moz-range-thumb {
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid #0a0a0c;
  box-shadow: 0 0 8px rgba(255, 180, 84, 0.5);
}

/* debug grid */
.debug-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 5px;
}
.debug-btn { flex: none; padding: 7px 0; text-align: center; }

/* panel toggle */
.panel-toggle {
  position: fixed;
  top: 64px; right: 14px;
  width: 34px; height: 34px;
  font-size: 18px;
  color: var(--text);
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  cursor: pointer;
  z-index: 21;
  display: none;
  backdrop-filter: blur(10px);
}
.panel-toggle:hover { color: var(--accent); }
.panel.collapsed ~ .panel-toggle { display: block; }

/* ---------------- hints footer ---------------- */
.hints {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  display: flex; flex-wrap: wrap; gap: 4px 14px;
  justify-content: center;
  padding: 10px 18px 12px;
  font-size: 9.5px;
  color: var(--text-dim);
  letter-spacing: 0.06em;
  pointer-events: none;
  z-index: 10;
  background: linear-gradient(0deg, rgba(0,0,0,0.5), transparent);
}
.hint-item b { color: var(--text); font-weight: 600; margin-right: 3px; }

/* toast */
.toast {
  position: fixed;
  left: 50%; bottom: 46px;
  transform: translate(-50%, 8px);
  padding: 7px 16px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--text);
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  backdrop-filter: blur(10px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s;
  z-index: 30;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* UI hidden mode (H) */
.ui-hidden .hud-top,
.ui-hidden .panel,
.ui-hidden .hints,
.ui-hidden .panel-toggle { opacity: 0; pointer-events: none; }

/* ---------------- loading / fatal overlays ---------------- */
#loading, #fatal {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: #000;
  z-index: 100;
  transition: opacity 0.6s ease;
}
#loading.hidden, #fatal:not(.show) { opacity: 0; pointer-events: none; }

.loading-inner, .fatal-inner { text-align: center; }
.loading-title, .fatal-title {
  font-size: 26px;
  letter-spacing: 0.5em;
  text-indent: 0.5em;
  color: var(--text);
  margin: 22px 0 10px;
  text-shadow: 0 0 24px rgba(255, 180, 84, 0.4);
}
.loading-sub, .fatal-msg {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--text-dim);
  text-transform: uppercase;
  max-width: 70vw;
  line-height: 1.8;
}
.loading-ring {
  width: 54px; height: 54px;
  margin: 0 auto;
  border-radius: 50%;
  border: 2px solid rgba(255, 180, 84, 0.15);
  border-top-color: var(--accent);
  animation: spin 1.1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.fatal-reload { margin-top: 18px; display: none; }

/* ---------------- mobile ---------------- */
@media (max-width: 720px) {
  .panel {
    top: auto; left: 8px; right: 8px; bottom: 8px;
    width: auto;
    max-height: 52vh;
  }
  .panel.collapsed { transform: translateY(calc(100% + 24px)); }
  .brand h1 { font-size: 15px; letter-spacing: 0.3em; }
  .chips { max-width: 55vw; }
  .chip { font-size: 9px; padding: 3px 6px; }
  .hints { display: none; }
  .panel-toggle { top: auto; bottom: 12px; right: 12px; }
}