:root {
  --bg: #061410;
  --bg-soft: #0a1c14;
  --bg-card: #0f2018;
  --bg-deep: #061410;
  --line: #1a2820;
  --line-strong: #2a3a30;
  --ink: #f3f3f3;
  --ink-soft: #b5c5b5;
  --ink-mute: #6a806a;
  --accent: #22c55e;
  --accent-warm: #fbbf24;
  --accent-cool: #6ec6ff;
  --r: 14px;
  --r-sm: 8px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Tajawal', system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}
body {
  background-image:
    radial-gradient(ellipse at top right, rgba(34, 197, 94, 0.08), transparent 50%),
    radial-gradient(ellipse at bottom left, rgba(168, 85, 247, 0.05), transparent 50%);
}
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
.lab { display: grid; grid-template-rows: 56px 1fr 84px; height: 100vh; width: 100vw; }
.lab__topbar {
  display: flex; align-items: center; gap: 12px; padding: 0 20px;
  border-bottom: 1px solid var(--line); background: var(--bg-soft);
}
.back {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  border-radius: var(--r-sm); color: var(--ink-soft);
  text-decoration: none; font-size: 18px;
  border: 1px solid var(--line); transition: 0.2s;
}
.back:hover { color: var(--ink); border-color: var(--line-strong); }
.title { display: flex; flex-direction: column; line-height: 1.15; }
.title__ar { font-size: 16px; font-weight: 700; }
.title__en { font-family: 'JetBrains Mono', monospace; font-size: 10px; color: var(--ink-mute); letter-spacing: 0.1em; }
.topbar-btn {
  margin-inline-start: auto;
  padding: 8px 14px; border: 1px solid var(--line); border-radius: var(--r-sm);
  color: var(--ink-soft); font-size: 13px; font-weight: 500;
  transition: 0.2s; display: flex; align-items: center; gap: 6px;
}
.topbar-btn:hover { color: var(--ink); border-color: var(--accent); }
.topbar-btn + .topbar-btn { margin-inline-start: 0; }
#experimentsBtn { color: var(--accent); border-color: var(--accent); }
#experimentsBtn:hover { background: rgba(34, 197, 94, 0.1); }
.lab__grid {
  display: grid; grid-template-columns: 280px 1fr 340px;
  gap: 16px; padding: 16px 16px 8px; min-height: 0;
}
.meters {
  display: flex; flex-direction: column; gap: 12px;
  padding: 16px; background: var(--bg-card);
  border: 1px solid var(--line); border-radius: var(--r);
  overflow-y: auto; max-height: 100%;
}
.meter { display: flex; flex-direction: column; gap: 5px; }
.meter__label {
  font-size: 11px; color: var(--ink-mute);
  text-transform: uppercase; letter-spacing: 0.05em;
}
.meter__bar { height: 5px; background: #14241a; border-radius: 3px; overflow: hidden; }
.meter__fill {
  height: 100%; width: 5%;
  background: linear-gradient(90deg, var(--accent-cool), var(--accent), var(--accent-warm));
  border-radius: 3px; transition: width 0.6s ease;
}
.meter[data-meter="size"] .meter__fill { background: linear-gradient(90deg, #a78bfa, #34d399, #fbbf24, #f97316); }
.meter[data-meter="complexity"] .meter__fill { background: linear-gradient(90deg, #6ec6ff, #34d399, #fbbf24, #dc2626); }
.meter__value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; color: var(--ink-soft); align-self: end;
}
.components, .composition {
  margin-top: 6px; display: flex; flex-direction: column; gap: 6px;
  padding-top: 10px; border-top: 1px solid var(--line);
}
.components__label, .composition__label {
  font-size: 11px; color: var(--ink-mute);
  text-transform: uppercase; letter-spacing: 0.05em;
}
.components__list { list-style: none; display: flex; flex-direction: column; gap: 4px; }
.components__list li {
  font-size: 11px; color: var(--ink-soft);
  padding: 4px 8px; background: rgba(255, 255, 255, 0.04);
  border-radius: 3px; border-inline-start: 2px solid var(--accent);
}
.composition__bar {
  height: 12px; display: flex; border-radius: 3px; overflow: hidden;
  background: #14241a;
}
.composition__bar-segment { height: 100%; transition: width 0.6s ease; }
.composition__legend { list-style: none; display: flex; flex-direction: column; gap: 3px; }
.composition__legend li {
  font-size: 11px; display: flex; align-items: center; gap: 6px;
  color: var(--ink-soft);
}
.composition__legend .swatch { width: 8px; height: 8px; border-radius: 2px; flex-shrink: 0; }
.composition__legend .pct {
  margin-inline-start: auto; font-family: 'JetBrains Mono', monospace; color: var(--ink-mute);
}
.stage {
  display: flex; flex-direction: column;
  background: radial-gradient(ellipse at center, #0f2018 0%, #061410 70%);
  border: 1px solid var(--line); border-radius: var(--r);
  padding: 12px 20px 16px; position: relative; overflow: hidden; min-height: 0;
}
.view-tabs {
  display: flex; gap: 4px; padding: 4px;
  background: var(--bg-deep); border-radius: var(--r-sm);
  margin-bottom: 12px; align-self: center;
}
.view-tab {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: var(--r-sm);
  color: var(--ink-mute); font-size: 13px; font-weight: 500;
  transition: 0.2s;
}
.view-tab:hover { color: var(--ink-soft); }
.view-tab.is-active {
  background: var(--bg-card); color: var(--ink);
  box-shadow: 0 0 0 1px var(--line-strong);
}
.view-tab__icon { font-size: 14px; color: var(--accent); }
.view-stack {
  flex: 1; position: relative; display: grid; place-items: center;
  width: 100%; min-height: 0;
}
.view {
  display: grid; place-items: center;
  width: 100%; height: 100%; min-height: 0;
}
.view[hidden] { display: none; }
canvas { max-width: 100%; max-height: 100%; }
.experiment-menu, .experiment-overlay {
  position: absolute; inset: 60px 24px 24px 24px;
  padding: 18px;
  background: rgba(6, 20, 16, 0.98);
  border: 1px solid var(--accent); border-radius: var(--r);
  backdrop-filter: blur(12px); z-index: 6;
  display: flex; flex-direction: column; gap: 12px;
  animation: modalIn 0.25s ease;
}
.experiment-menu[hidden], .experiment-overlay[hidden] { display: none; }
@keyframes modalIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.experiment-menu__head, .experiment-overlay__head {
  display: flex; align-items: center; justify-content: space-between;
}
.experiment-menu__head em { color: var(--accent); font-style: normal; font-weight: 700; }
.experiment-menu__close, .experiment-overlay__close {
  width: 26px; height: 26px;
  display: grid; place-items: center;
  border-radius: 50%; background: #14241a;
  color: var(--ink-mute); font-size: 16px; line-height: 1;
}
.experiment-menu__close:hover, .experiment-overlay__close:hover { color: var(--ink); }
.experiment-menu__list {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px; overflow-y: auto;
}
.experiment-card {
  display: flex; flex-direction: column; gap: 6px;
  padding: 14px; background: var(--bg-card);
  border: 1px solid var(--line); border-radius: var(--r-sm);
  text-align: start; transition: 0.2s;
}
.experiment-card:hover { border-color: var(--accent); background: #14281c; }
.experiment-card:disabled { opacity: 0.35; cursor: not-allowed; }
.experiment-card__head { display: flex; align-items: center; gap: 8px; }
.experiment-card__icon { font-size: 22px; }
.experiment-card__title { font-size: 14px; font-weight: 700; color: var(--ink); }
.experiment-card__desc { font-size: 12px; color: var(--ink-soft); line-height: 1.5; }
.experiment-card__avail { font-size: 10px; color: var(--ink-mute); margin-top: auto; font-family: 'JetBrains Mono', monospace; }
.experiment-overlay__title { font-size: 15px; font-weight: 700; color: var(--accent); }
.experiment-overlay__stage { flex: 1; display: grid; place-items: center; min-height: 0; }
.experiment-overlay__caption {
  font-size: 13px; color: var(--ink-soft); text-align: center;
  padding: 12px 0 0; line-height: 1.6; min-height: 50px;
  border-top: 1px solid var(--line); margin-top: 10px;
}
.info { display: flex; flex-direction: column; gap: 12px; min-height: 0; overflow: hidden; }
.card {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--r); padding: 16px;
  display: flex; flex-direction: column; gap: 8px;
  overflow-y: auto;
}
.card__head { display: flex; align-items: center; justify-content: space-between; }
.card__label {
  font-family: 'JetBrains Mono', monospace; font-size: 10px; color: var(--ink-mute);
  letter-spacing: 0.1em; text-transform: uppercase;
}
.card__name { font-size: 24px; font-weight: 900; letter-spacing: -0.01em; }
.card__family {
  display: inline-block; width: max-content;
  font-size: 11px; padding: 3px 8px; border-radius: 3px;
  background: rgba(34, 197, 94, 0.15); color: var(--accent);
  font-weight: 500;
}
.card__origin { font-size: 13px; color: var(--ink-soft); line-height: 1.6; }
.card__subhead {
  font-size: 12px; color: var(--ink-mute);
  text-transform: uppercase; letter-spacing: 0.05em;
  margin-top: 4px;
}
.card__signs {
  list-style: none; display: flex; flex-direction: column; gap: 4px;
  font-size: 12px; color: var(--ink-soft);
}
.card__signs li { padding-inline-start: 14px; position: relative; }
.card__signs li::before {
  content: "·"; position: absolute;
  inset-inline-start: 4px; color: var(--accent); font-weight: 700;
}
.card__where { font-size: 12px; color: var(--ink-mute); margin-top: 2px; }
.card__where em { font-style: normal; color: var(--ink-soft); }
.card__fact {
  font-size: 12px; color: var(--ink-soft); font-style: italic;
  border-inline-start: 2px solid var(--accent);
  padding-inline-start: 10px; margin-top: 4px;
}
.selector {
  background: var(--bg-soft); border-top: 1px solid var(--line);
  display: grid; place-items: center; overflow: hidden;
}
.selector__inner {
  display: flex; gap: 8px; padding: 0 16px;
  overflow-x: auto; max-width: 100%;
}
.selector-card {
  display: flex; flex-direction: column;
  align-items: center; gap: 4px;
  padding: 8px 14px; border-radius: var(--r-sm);
  border: 1px solid var(--line); background: var(--bg-card);
  min-width: 130px; flex-shrink: 0; transition: 0.3s;
}
.selector-card:hover { border-color: var(--accent); }
.selector-card.is-active {
  border-color: var(--accent); background: #14281c;
  box-shadow: 0 0 24px rgba(34, 197, 94, 0.25);
}
.selector-card__icon { font-size: 18px; line-height: 1; }
.selector-card__name { font-size: 12px; font-weight: 700; }
.selector-card__sub { font-size: 10px; color: var(--ink-mute); }
.selector-card.is-active .selector-card__sub { color: var(--accent); }
@media (max-width: 1200px) { .lab__grid { grid-template-columns: 230px 1fr 300px; } }
@media (max-width: 1000px) {
  .lab { grid-template-rows: 56px 1fr auto; }
  .lab__grid { grid-template-columns: 1fr; grid-template-rows: auto 1fr auto; }
  .meters { flex-direction: row; flex-wrap: wrap; max-height: none; }
  .meter { flex: 1 1 130px; }
}