/* GARGANTUA - quiet console aesthetic: monochrome, high density, thin rules */

:root {
  --fg: #d5dae2;
  --fg-dim: #8a93a0;
  --fg-faint: #565f6b;
  --bg: #020204;
  --line: rgba(213, 218, 226, 0.14);
  --accent: #e8b25c;
  --panel-bg: rgba(8, 9, 12, 0.82);
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
}

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

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--mono);
  overflow: hidden;
}

#app { position: fixed; inset: 0; }
#app canvas.gl { position: absolute; inset: 0; display: block; touch-action: none; cursor: grab; }
#app canvas.gl:active { cursor: grabbing; }

/* ------------------------------------------------------------- HUD */
.hud {
  position: absolute; top: 18px; left: 20px;
  pointer-events: none; user-select: none;
  font-size: 11px; letter-spacing: 0.12em;
}
.hud-title {
  font-size: 17px; font-weight: 700; letter-spacing: 0.42em;
  color: var(--fg);
}
.hud-sub {
  margin-top: 2px; font-size: 9px; letter-spacing: 0.34em;
  color: var(--fg-dim);
}
.hud-rows { margin-top: 14px; line-height: 1.9; }
.hud-row span { margin-right: 10px; }
.hud-row.dim { color: var(--fg-dim); font-size: 10px; }
#hud-fps { color: var(--accent); }
.hidden { display: none !important; }

/* ---------------------------------------------------------- toolbar */
#toolbar {
  position: absolute; top: 18px; right: 20px;
  display: flex; gap: 6px;
}
.tb-btn {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em;
  color: var(--fg-dim); background: rgba(10, 11, 14, 0.6);
  border: 1px solid var(--line);
  padding: 7px 10px; cursor: pointer;
  backdrop-filter: blur(6px);
  transition: color .15s, border-color .15s;
}
.tb-btn:hover { color: var(--fg); border-color: rgba(213,218,226,.4); }
.tb-btn.active { color: var(--accent); border-color: rgba(232,178,92,.5); }

/* ------------------------------------------------------------ panel */
.panel {
  position: absolute; top: 64px; right: 20px; bottom: 64px;
  width: 308px;
  background: var(--panel-bg);
  border: 1px solid var(--line);
  backdrop-filter: blur(10px);
  padding: 14px 14px 18px;
  overflow-y: auto;
  transform: translateX(24px); opacity: 0; pointer-events: none;
  transition: transform .22s ease, opacity .22s ease;
  scrollbar-width: thin; scrollbar-color: var(--fg-faint) transparent;
}
.panel.open { transform: none; opacity: 1; pointer-events: auto; }
.panel-group { margin-bottom: 16px; }
.panel-group-title {
  font-size: 9px; letter-spacing: 0.3em; color: var(--fg-faint);
  border-bottom: 1px solid var(--line);
  padding-bottom: 5px; margin-bottom: 8px;
}
.prow {
  display: grid; grid-template-columns: 118px 1fr 42px;
  align-items: center; gap: 8px;
  font-size: 10px; color: var(--fg-dim);
  padding: 3.5px 0; cursor: ew-resize;
}
.pval { text-align: right; color: var(--fg); font-size: 10px; }
.plabel { letter-spacing: 0.05em; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

input[type="range"] {
  -webkit-appearance: none; appearance: none;
  height: 2px; background: var(--line); outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 9px; height: 9px; background: var(--fg);
  border-radius: 0; cursor: ew-resize;
}
input[type="range"]::-moz-range-thumb {
  width: 9px; height: 9px; background: var(--fg); border: none; border-radius: 0;
}
input[type="range"]:hover::-webkit-slider-thumb { background: var(--accent); }

.preset-btn {
  display: block; width: 100%;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.18em;
  color: var(--fg-dim); background: transparent;
  border: 1px solid var(--line);
  padding: 8px 10px; margin-bottom: 6px; cursor: pointer; text-align: left;
  transition: color .15s, border-color .15s;
}
.preset-btn:hover { color: var(--accent); border-color: rgba(232,178,92,.5); }

/* ------------------------------------------------------------ hints */
.hints {
  position: absolute; bottom: 16px; right: 20px;
  font-size: 10px; letter-spacing: 0.1em; color: var(--fg-faint);
  pointer-events: none; user-select: none;
}
.hints b { color: var(--fg-dim); font-weight: 600; }

/* ------------------------------------------------------------- toast */
.toast {
  position: absolute; bottom: 52px; left: 50%; transform: translate(-50%, 8px);
  font-size: 11px; letter-spacing: 0.3em; color: var(--accent);
  background: rgba(8, 9, 12, 0.75); border: 1px solid rgba(232,178,92,.35);
  padding: 9px 18px;
  opacity: 0; pointer-events: none;
  transition: opacity .25s, transform .25s;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* -------------------------------------------------------------- help */
.help {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(2, 2, 4, 0.72);
  backdrop-filter: blur(4px); z-index: 30;
}
.help-card {
  background: var(--panel-bg); border: 1px solid var(--line);
  padding: 26px 30px; max-width: 560px; width: min(92vw, 560px);
  max-height: 82vh; overflow-y: auto;
}
.help-title { font-size: 11px; letter-spacing: 0.4em; color: var(--fg-faint); margin-bottom: 14px; }
.help-card table { border-collapse: collapse; font-size: 11px; width: 100%; }
.help-card td { padding: 5px 8px 5px 0; color: var(--fg-dim); line-height: 1.5; vertical-align: top; }
.help-card td:first-child { color: var(--accent); white-space: nowrap; letter-spacing: 0.08em; }

/* ----------------------------------------------------------- overlay */
.overlay {
  position: absolute; inset: 0; z-index: 40;
  display: flex; align-items: center; justify-content: center;
  background: radial-gradient(ellipse at center, #0a0b10 0%, #020204 75%);
}
.overlay-card { text-align: center; padding: 30px; }
.ov-title { font-size: 15px; letter-spacing: 0.45em; color: var(--fg); }
.ov-sub { margin-top: 12px; font-size: 11px; letter-spacing: 0.12em; color: var(--fg-dim); max-width: 46ch; }
.ov-sub.dim { color: var(--fg-faint); }

/* ------------------------------------------------------------ mobile */
@media (max-width: 720px) {
  .hud { top: 12px; left: 14px; font-size: 10px; }
  .hud-rows { display: none; }
  .hud-title { font-size: 14px; }
  #toolbar { top: auto; bottom: 14px; right: 14px; }
  .tb-btn { padding: 9px 12px; }
  .hints { display: none; }
  .panel {
    top: auto; left: 12px; right: 12px; bottom: 64px; width: auto;
    max-height: 46vh;
  }
  .prow { grid-template-columns: 104px 1fr 40px; }
}