/* ============================================================
   PARTICLE LAB — styles
   Identity: "The Instrument Console" — a precision lab scope.
   ============================================================ */
:root {
  --bg: #06070d;
  --panel: rgba(10, 13, 22, 0.66);
  --panel-2: rgba(16, 20, 32, 0.5);
  --panel-border: rgba(255, 255, 255, 0.08);
  --line: rgba(255, 255, 255, 0.05);
  --text: #eaeef7;
  --text-dim: #7f889e;
  --text-faint: #565e72;
  /* accent trio — overridden at runtime by applyThemeToDom() */
  --accent: #6cf;
  --accent-2: #f6c;
  --glow: rgba(102, 204, 255, 0.55);
  --radius: 8px;
  --radius-sm: 4px;
  --display: "Chakra Petch", "Segoe UI", system-ui, sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --sans: "Chakra Petch", "Segoe UI", system-ui, sans-serif;
}

* { 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(--sans);
  user-select: none;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* subtle depth vignette over the stage (never dims the center) */
body::after {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 3;
  background: radial-gradient(ellipse at center, transparent 58%, rgba(0, 0, 0, 0.42) 100%);
}

/* visible keyboard focus */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

/* ---------- stage ---------- */
#stage-wrap { position: fixed; inset: 0; }
#stage2d, #stage3d {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  display: block;
}
#stage3d { opacity: 0; pointer-events: none; transition: opacity 0.4s; }
body.mode-3d #stage3d { opacity: 1; }
body.mode-3d #stage2d { opacity: 0; }

/* ---------- viewfinder frame (signature) ---------- */
#viewfinder {
  position: fixed; inset: 10px;
  pointer-events: none;
  z-index: 40;
}
#viewfinder::before {
  content: "";
  position: absolute; inset: 0;
  border: 1px solid var(--line);
}
.vf-corner {
  position: absolute;
  width: 22px; height: 22px;
  border: 0 solid var(--glow);
  opacity: 0.7;
}
.vf-corner.tl { top: -1px; left: -1px; border-top-width: 2px; border-left-width: 2px; }
.vf-corner.tr { top: -1px; right: -1px; border-top-width: 2px; border-right-width: 2px; }
.vf-corner.bl { bottom: -1px; left: -1px; border-bottom-width: 2px; border-left-width: 2px; }
.vf-corner.br { bottom: -1px; right: -1px; border-bottom-width: 2px; border-right-width: 2px; }

/* ---------- custom cursor (visible, but only slightly opaque) ---------- */
/* native cursor is hidden only once JS boots (body.js-running);
   if the app fails to load, the normal mouse stays visible */
body.js-running, body.js-running * { cursor: none; }
#cursor {
  position: fixed; left: 0; top: 0;
  width: 6px; height: 6px;
  margin: -3px 0 0 -3px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--glow), 0 0 2px #fff;
  opacity: 0.9;
  pointer-events: none; z-index: 9999;
}
#cursor-ring {
  position: fixed; left: 0; top: 0;
  width: 32px; height: 32px;
  margin: -16px 0 0 -16px;
  border-radius: 50%;
  border: 1px solid var(--glow);
  opacity: 0.55;
  pointer-events: none; z-index: 9998;
  transition: transform 0.15s ease-out, border-color 0.3s, opacity 0.3s;
}
#cursor-ring.pressed { transform: scale(0.6); border-color: var(--accent-2); opacity: 0.9; }

/* ---------- HUD ---------- */
#hud {
  position: fixed; top: 0; left: 0; right: 0;
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 20px;
  padding: 20px 26px;
  pointer-events: none; z-index: 50;
}
#brand { display: flex; align-items: center; gap: 11px; }
.brand-mark {
  font-size: 22px; color: var(--accent);
  text-shadow: 0 0 18px var(--glow);
  animation: spin 10s linear infinite;
  line-height: 1;
}
@keyframes spin { to { transform: rotate(360deg); } }
.brand-text {
  font-family: var(--display); font-weight: 700;
  letter-spacing: 0.34em; font-size: 14px;
  color: var(--text);
}
#effect-readout { text-align: center; position: relative; }
#effect-readout::before {
  content: "";
  display: block;
  width: 30px; height: 2px;
  margin: 0 auto 9px;
  background: var(--accent);
  box-shadow: 0 0 10px var(--glow);
  border-radius: 2px;
}
#effect-index {
  font-family: var(--mono); font-size: 11px;
  color: var(--text-dim); letter-spacing: 0.28em;
}
#effect-name {
  font-family: var(--display);
  font-size: 26px; font-weight: 600;
  letter-spacing: 0.04em;
  margin-top: 2px;
  text-shadow: 0 0 26px var(--glow);
}
#effect-category {
  font-family: var(--mono); font-size: 10px;
  color: var(--accent); letter-spacing: 0.4em;
  text-transform: uppercase; margin-top: 4px;
}
#effect-hint {
  font-family: var(--mono); font-size: 10px;
  color: var(--text-dim); letter-spacing: 0.06em;
  margin-top: 6px; max-width: 320px; line-height: 1.55;
  opacity: 0.9;
}
#effect-controls {
  margin-top: 10px; display: none;
  flex-direction: column; align-items: center; gap: 8px;
  pointer-events: auto;
}
#effect-controls.visible { display: flex; }
.ec-row { display: flex; align-items: center; gap: 10px; }
.ec-label {
  font-family: var(--mono); font-size: 9px;
  color: var(--text-dim); letter-spacing: 0.2em; text-transform: uppercase;
}
.ec-range { width: 96px; cursor: pointer; }
.ec-val {
  font-family: var(--mono); font-size: 10px;
  color: var(--accent); min-width: 16px; text-align: center;
}
.ec-btn {
  font-family: var(--mono); font-size: 10px;
  letter-spacing: 0.15em; text-transform: uppercase;
  padding: 6px 18px; border-radius: var(--radius-sm);
  background: var(--panel); border: 1px solid var(--panel-border);
  color: var(--text-dim); cursor: pointer;
  transition: all 0.15s ease; user-select: none;
}
.ec-btn:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-1px); }
.ec-btn.active {
  color: #05060a; background: var(--accent); border-color: var(--accent);
  box-shadow: 0 0 18px var(--glow);
}
#lib-badges { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; max-width: 260px; }
.badge {
  font-family: var(--mono); font-size: 9px;
  padding: 4px 9px; border-radius: var(--radius-sm);
  background: var(--panel); border: 1px solid var(--panel-border);
  color: var(--text-dim); letter-spacing: 0.16em;
  transition: color 0.15s, border-color 0.15s;
}
.badge:hover { color: var(--text); border-color: var(--glow); }

/* ---------- dock ---------- */
#dock {
  position: fixed; left: 14px; top: 50%;
  transform: translateY(-50%);
  width: 216px; max-height: 76vh;
  overflow-y: auto; overflow-x: hidden;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  backdrop-filter: blur(14px);
  padding: 10px;
  z-index: 60;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  scrollbar-width: thin;
  scrollbar-color: var(--panel-border) transparent;
  -webkit-mask-image: linear-gradient(to bottom, transparent 0, #000 14px, #000 calc(100% - 14px), transparent 100%);
  mask-image: linear-gradient(to bottom, transparent 0, #000 14px, #000 calc(100% - 14px), transparent 100%);
}
#dock::-webkit-scrollbar { width: 6px; }
#dock::-webkit-scrollbar-thumb { background: var(--panel-border); border-radius: 3px; }
#dock::-webkit-scrollbar-track { background: transparent; }
.dock-item {
  position: relative;
  display: flex; align-items: center; gap: 10px;
  padding: 7px 10px 7px 12px; border-radius: var(--radius-sm);
  font-family: var(--sans);
  font-size: 12.5px; font-weight: 500;
  color: var(--text-dim);
  border: 1px solid transparent;
  transition: background 0.18s, color 0.18s, border-color 0.18s, transform 0.18s;
  cursor: pointer;
}
.dock-item::before {
  content: "";
  position: absolute; left: 0; top: 50%;
  width: 2px; height: 0;
  transform: translateY(-50%);
  background: var(--accent);
  box-shadow: 0 0 8px var(--glow);
  border-radius: 2px;
  transition: height 0.18s ease;
}
.dock-item:hover { background: rgba(255, 255, 255, 0.05); color: var(--text); transform: translateX(2px); }
.dock-item:hover::before { height: 60%; }
.dock-item.active {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border-color: color-mix(in srgb, var(--accent) 30%, transparent);
  color: var(--text);
}
.dock-item.active::before { height: 72%; }
.dock-item .num {
  font-family: var(--mono); font-size: 10px;
  color: var(--text-faint); width: 24px; flex: none;
  letter-spacing: 0.05em;
}
.dock-item.active .num { color: var(--accent); }
.dock-item .label { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dock-item .cat-dot {
  width: 6px; height: 6px; border-radius: 50%;
  flex: none;
}
.dock-section {
  font-family: var(--mono); font-size: 9px;
  letter-spacing: 0.26em; color: var(--text-faint);
  padding: 13px 10px 6px; text-transform: uppercase;
  display: flex; align-items: center; gap: 8px;
}
.dock-section::before {
  content: "";
  width: 10px; height: 1px;
  background: var(--glow);
}

/* ---------- controls ---------- */
#controls {
  position: fixed; right: 14px; top: 50%;
  transform: translateY(-50%);
  width: 208px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  backdrop-filter: blur(14px);
  padding: 16px;
  z-index: 60;
  display: flex; flex-direction: column; gap: 15px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}
#controls::before {
  content: "CONSOLE";
  font-family: var(--mono); font-size: 9px;
  letter-spacing: 0.3em; color: var(--text-faint);
  text-transform: uppercase;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}
.ctl-group label {
  display: flex; justify-content: space-between; align-items: baseline;
  font-family: var(--mono); font-size: 10px;
  letter-spacing: 0.16em; color: var(--text-dim);
  text-transform: uppercase; margin-bottom: 8px;
}
.ctl-group label span { color: var(--accent); letter-spacing: 0.05em; }
.ctl-group input[type="checkbox"] {
  -webkit-appearance: none; appearance: none;
  width: 16px; height: 16px;
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.04);
  cursor: pointer; position: relative;
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
}
.ctl-group input[type="checkbox"]:checked {
  background: var(--accent); border-color: var(--accent);
  box-shadow: 0 0 10px var(--glow);
}
.ctl-group input[type="checkbox"]:checked::after {
  content: "";
  position: absolute; left: 5px; top: 2px;
  width: 4px; height: 8px;
  border: solid #05060a; border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
#theme-swatches { display: flex; gap: 8px; flex-wrap: wrap; }
.swatch {
  width: 22px; height: 22px; border-radius: 6px;
  border: 2px solid transparent;
  box-shadow: inset 0 1px 2px rgba(255, 255, 255, 0.25);
  cursor: pointer;
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
}
.swatch:hover { transform: scale(1.14); }
.swatch.active {
  border-color: #fff;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.15), 0 0 12px var(--glow);
}
.ctl-buttons { display: flex; gap: 6px; margin-top: 4px; }
.ctl-buttons button {
  flex: 1; padding: 8px 4px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm); color: var(--text);
  font-family: var(--mono); font-size: 10px;
  letter-spacing: 0.08em; cursor: pointer;
  transition: background 0.18s, border-color 0.18s, transform 0.18s, color 0.18s;
}
.ctl-buttons button:hover {
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border-color: var(--glow); color: #fff; transform: translateY(-1px);
}
.ctl-buttons button:active { transform: translateY(0); }

/* range inputs — shared by console + per-effect controls */
input[type="range"] {
  -webkit-appearance: none; appearance: none;
  height: 4px; border-radius: 3px;
  background: rgba(255, 255, 255, 0.12);
  outline: none; cursor: pointer;
}
.ctl-group input[type="range"] { width: 100%; }
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent);
  border: 2px solid #0a0d16;
  box-shadow: 0 0 10px var(--glow);
  transition: transform 0.12s;
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.18); }
input[type="range"]::-moz-range-thumb {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent); border: 2px solid #0a0d16;
  box-shadow: 0 0 10px var(--glow);
}
input[type="range"]::-moz-range-track {
  height: 4px; border-radius: 3px; background: rgba(255, 255, 255, 0.12);
}

/* ---------- audio indicator ---------- */
#audio-indicator {
  position: fixed; right: 24px; bottom: 22px;
  display: flex; gap: 3px; align-items: flex-end;
  height: 20px; z-index: 50;
}
#audio-indicator span {
  width: 3px; height: 4px; border-radius: 2px;
  background: var(--accent);
  box-shadow: 0 0 6px var(--glow);
  transition: height 0.08s;
}

/* ---------- telemetry readout ---------- */
#readout {
  position: fixed; left: 24px; bottom: 22px;
  display: flex; gap: 14px; align-items: baseline;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.08em;
  color: var(--text-dim);
  z-index: 50; pointer-events: none;
}
#readout span { display: inline-flex; gap: 5px; align-items: baseline; }
#readout b { color: var(--accent); font-weight: 500; }
#readout i { font-style: normal; color: var(--text-faint); }

/* ---------- hint ---------- */
#hint {
  position: fixed; bottom: 18px; left: 50%;
  transform: translateX(-50%);
  display: flex; gap: 22px;
  font-family: var(--mono); font-size: 10px;
  color: var(--text-dim); letter-spacing: 0.06em;
  z-index: 50; pointer-events: none;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 22px; padding: 9px 22px;
  backdrop-filter: blur(10px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}
#hint b { color: var(--accent); font-weight: 500; }

/* ---------- gallery ---------- */
#gallery {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(3, 4, 8, 0.92);
  backdrop-filter: blur(8px);
  overflow-y: auto;
  padding: 90px 60px 60px;
}
#gallery h2 {
  font-family: var(--mono); font-size: 12px;
  letter-spacing: 0.32em; color: var(--text-dim);
  margin-bottom: 26px; text-transform: uppercase;
  display: flex; align-items: center; gap: 14px;
}
#gallery h2::before {
  content: ""; width: 26px; height: 2px;
  background: var(--accent); box-shadow: 0 0 10px var(--glow);
}
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(176px, 1fr));
  gap: 14px;
}
.gallery-tile {
  position: relative;
  border-radius: var(--radius);
  border: 1px solid var(--panel-border);
  overflow: hidden;
  background: #0a0d16;
  aspect-ratio: 16 / 10;
  cursor: pointer;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}
.gallery-tile:hover {
  transform: translateY(-4px) scale(1.02);
  border-color: var(--glow);
  box-shadow: 0 14px 44px color-mix(in srgb, var(--glow) 45%, transparent);
}
.gallery-tile canvas { width: 100%; height: 100%; display: block; }
.gallery-tile .tile-label {
  position: absolute; left: 11px; bottom: 9px;
  font-family: var(--sans); font-size: 11.5px; font-weight: 600;
  text-shadow: 0 1px 4px #000;
  z-index: 2;
}
.gallery-tile .tile-num {
  position: absolute; left: 11px; top: 9px;
  font-family: var(--mono); font-size: 9px;
  color: var(--accent); letter-spacing: 0.1em;
  z-index: 2;
}

/* ---------- intro ---------- */
#intro {
  position: fixed; inset: 0; z-index: 1000;
  overflow-y: auto;
  background: radial-gradient(ellipse at 50% 0%, #0a0e1a 0%, #030408 72%);
  padding: 56px 40px 64px;
}
.intro-inner { max-width: 1120px; margin: 0 auto; }
.intro-head { text-align: center; margin-bottom: 38px; }
.intro-eyebrow {
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.5em; color: var(--text-dim);
  text-transform: uppercase;
  display: inline-flex; align-items: center; gap: 14px;
  margin-bottom: 22px;
}
.intro-eyebrow::before,
.intro-eyebrow::after {
  content: ""; width: 34px; height: 1px; background: var(--glow);
}
.intro-head h1 {
  font-family: var(--display); font-size: 52px;
  letter-spacing: 0.28em; font-weight: 700;
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent));
  background-size: 200%;
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 5s linear infinite;
  margin-bottom: 16px;
  padding-left: 0.28em;
}
@keyframes shimmer { to { background-position: 200%; } }
.intro-head p { color: var(--text-dim); font-size: 14px; margin-bottom: 0; letter-spacing: 0.06em; }
.intro-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(164px, 1fr));
  gap: 14px;
  margin-bottom: 38px;
}
.intro-tile {
  position: relative;
  border-radius: var(--radius);
  border: 1px solid var(--panel-border);
  overflow: hidden;
  background: #0a0d16;
  aspect-ratio: 16 / 10;
  cursor: pointer;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}
.intro-tile:hover {
  transform: translateY(-4px) scale(1.02);
  border-color: var(--glow);
  box-shadow: 0 14px 44px color-mix(in srgb, var(--glow) 45%, transparent);
}
.intro-tile canvas { width: 100%; height: 100%; display: block; }
.intro-tile .tile-label {
  position: absolute; left: 11px; bottom: 9px;
  font-family: var(--sans); font-size: 11.5px; font-weight: 600;
  text-shadow: 0 1px 4px #000;
  z-index: 2;
}
.intro-tile .tile-num {
  position: absolute; left: 11px; top: 9px;
  font-family: var(--mono); font-size: 9px;
  color: var(--accent); letter-spacing: 0.1em;
  z-index: 2;
}
.intro-foot { text-align: center; }
#intro-start {
  padding: 15px 46px;
  font-family: var(--display); font-size: 13px; font-weight: 600;
  letter-spacing: 0.24em; text-transform: uppercase;
  background: transparent; color: var(--text);
  border: 1px solid var(--glow); border-radius: 2px;
  box-shadow: 0 0 30px color-mix(in srgb, var(--glow) 50%, transparent),
             inset 0 0 20px color-mix(in srgb, var(--glow) 12%, transparent);
  cursor: pointer;
  transition: all 0.3s;
}
#intro-start:hover {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  box-shadow: 0 0 54px color-mix(in srgb, var(--glow) 70%, transparent),
             inset 0 0 30px color-mix(in srgb, var(--glow) 20%, transparent);
  transform: scale(1.04);
  color: #fff;
}
.intro-foot small { display: block; margin-top: 22px; color: var(--text-dim); font-size: 11px; letter-spacing: 0.04em; }

/* ---------- file:// warning ---------- */
#file-warning {
  position: fixed; left: 50%; bottom: 26px;
  transform: translateX(-50%);
  z-index: 10001;
  max-width: 560px;
  padding: 16px 24px;
  background: rgba(12, 14, 24, 0.94);
  border: 1px solid rgba(255, 210, 122, 0.5);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--mono); font-size: 12px; line-height: 1.7;
  text-align: center;
  box-shadow: 0 12px 44px rgba(0, 0, 0, 0.55);
}
#file-warning code { color: var(--accent); }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  #dock { width: 150px; }
  #controls { width: 150px; }
  .dock-item { font-size: 11px; }
  #hint { display: none; }
  #readout { display: none; }
  .vf-corner { width: 16px; height: 16px; }
  #effect-name { font-size: 20px; }
  .intro-head h1 { font-size: 34px; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}