/* Augmenta Labs — shared design system (mirrors Augmenta Downforce / aero.html) */
:root {
  --bg: #05080f;
  --panel: rgba(9, 14, 25, 0.78);
  --panel-solid: #0b1220;
  --line: rgba(130, 190, 255, 0.13);
  --line-strong: rgba(130, 190, 255, 0.28);
  --text: #e7f0ff;
  --soft: #b9c7db;
  --mute: #8193ad;
  --acc: #38e1ff;
  --acc-dim: rgba(56, 225, 255, 0.14);
  --violet: #8b6cff;
  --warm: #ff6a3d;
  --good: #3be38f;
  --bad: #ff5470;
  --amber: #f2c53a;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
  --font: Inter, system-ui, 'Segoe UI', sans-serif;
  --display: var(--font);
  --surface: rgba(255,255,255,0.035);
  --surface-2: rgba(255,255,255,0.06);
  --track: rgba(255,255,255,0.08);
  --hard: #e7f0ff;
  --radius: 16px;
  --radius-sm: 12px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { min-height: 100%; background: var(--bg); color: var(--text);
  font-family: var(--font); font-size: 13px; }
body {
  background:
    radial-gradient(900px 600px at 12% -10%, rgba(56,225,255,0.09), transparent 60%),
    radial-gradient(900px 700px at 100% 110%, rgba(139,108,255,0.10), transparent 60%),
    var(--bg);
}
body::before { content: ''; position: fixed; inset: 0; pointer-events: none; z-index: 0; opacity: .5;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px; mask-image: radial-gradient(ellipse at 50% 40%, #000 20%, transparent 75%); }
button, select, input { font: inherit; color: inherit; }
a { color: var(--acc); text-decoration: none; }
.hidden { display: none !important; }

.panel { background: var(--panel); backdrop-filter: blur(16px) saturate(150%); -webkit-backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid var(--line); border-radius: 16px;
  box-shadow: var(--shadow, 0 24px 60px rgba(0,0,0,0.45), inset 0 1px 0 rgba(255,255,255,0.04)); }

/* ── Top bar ── */
#topbar { position: sticky; top: 14px; z-index: 20; margin: 14px 14px 0; min-height: 58px; display: flex; align-items: center; gap: 14px; padding: 8px 14px 8px 18px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--text); }
.logo { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; flex-shrink: 0;
  background: linear-gradient(135deg, var(--acc), var(--violet)); box-shadow: 0 0 24px rgba(56,225,255,0.35); }
.brand h1 { font-family: var(--display); font-size: 16px; font-weight: 800; letter-spacing: 0.5px; white-space: nowrap; }
.brand h1 span { color: var(--acc); }
.brand p { font-size: 11px; color: var(--mute); letter-spacing: 0.3px; }
.spacer { flex: 1; }
.seg { display: flex; background: var(--surface); border: 1px solid var(--line); border-radius: 11px; padding: 3px; gap: 2px; }
.seg button, .seg a { border: 0; background: transparent; padding: 7px 12px; border-radius: 8px; cursor: pointer; color: var(--mute); font-weight: 600; font-size: 12px; display: flex; align-items: center; justify-content: center; gap: 6px; transition: all .15s; flex: 1; white-space: nowrap; }
.seg button:hover, .seg a:hover { color: var(--text); background: var(--surface-2); }
.seg .on { background: var(--acc-dim); color: var(--acc) !important; box-shadow: inset 0 0 0 1px rgba(56,225,255,0.35); }
.seg.sm button, .seg.sm a { padding: 5px 9px; font-size: 11px; }
.level { display: flex; align-items: center; gap: 8px; font-size: 10.5px; color: var(--mute); font-weight: 700; letter-spacing: 1.2px; text-transform: uppercase; }
.btn { border: 1px solid var(--line-strong); background: var(--surface); padding: 8px 13px; border-radius: 10px; cursor: pointer; font-weight: 600; font-size: 12px; display: inline-flex; align-items: center; justify-content: center; gap: 7px; transition: all .15s; white-space: nowrap; color: var(--text); }
.btn:hover { background: var(--track); border-color: var(--acc); }
.btn.primary { background: linear-gradient(135deg, rgba(56,225,255,0.22), rgba(139,108,255,0.22)); border-color: rgba(56,225,255,0.5); }
.btn.small { padding: 6px 10px; font-size: 11px; }

/* ── Lab layout ── */
.lab { position: relative; z-index: 1; display: grid; grid-template-columns: 310px minmax(0, 1fr) 320px; gap: 14px; padding: 14px; height: calc(100vh - 86px); min-height: 620px; }
.lab > .panel { overflow-y: auto; padding: 16px; }
.lab > .panel::-webkit-scrollbar { width: 6px; }
.lab > .panel::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 3px; }
.stage { position: relative; padding: 0 !important; overflow: hidden !important; display: flex; flex-direction: column; }
.stage-h { display: flex; align-items: center; gap: 10px; padding: 12px 14px 0; flex-wrap: wrap; }
.stage-h .t { font-size: 10.5px; font-weight: 700; letter-spacing: 1.4px; text-transform: uppercase; color: var(--mute); display: flex; align-items: center; gap: 8px; }
.stage-body { flex: 1; position: relative; min-height: 0; }
.stage-body canvas, .cv { display: block; width: 100%; height: 100%; }
.stage-foot { padding: 0 14px 12px; font-size: 11px; color: var(--mute); display: flex; gap: 14px; flex-wrap: wrap; }
.stage-foot i { display: inline-block; width: 9px; height: 9px; border-radius: 2px; margin-right: 5px; vertical-align: -1px; }
.live-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--good); box-shadow: 0 0 8px var(--good); animation: pulse 1.4s infinite; }
@keyframes pulse { 0% { opacity: .3 } 50% { opacity: 1 } 100% { opacity: .3 } }

.sec { margin-bottom: 20px; }
.sec:last-child { margin-bottom: 0; }
.sec-h { font-size: 10.5px; font-weight: 700; letter-spacing: 1.6px; text-transform: uppercase; color: var(--mute); margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
.sec-h::after { content: ''; flex: 1; height: 1px; background: var(--line); }

/* choice cards (like eras) */
.choices { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.choices.three { grid-template-columns: 1fr 1fr 1fr; }
.choices.one { grid-template-columns: 1fr; }
.choice { border: 1px solid var(--line); background: var(--surface); border-radius: 12px; padding: 8px 10px; cursor: pointer; text-align: left; transition: all .15s; position: relative; overflow: hidden; color: var(--text); }
.choice b { display: block; font-size: 12.5px; font-weight: 700; }
.choice span { font-size: 10.5px; color: var(--mute); font-weight: 600; }
.choice::after { content: ''; position: absolute; right: -14px; top: -14px; width: 40px; height: 40px; border-radius: 50%; background: var(--c, var(--acc)); opacity: .35; filter: blur(8px); }
.choice:hover { border-color: var(--line-strong); background: var(--surface-2); }
.choice.on { border-color: rgba(56,225,255,0.55); background: var(--acc-dim); }
.choice.on b { color: var(--acc); }

/* sliders */
.ctl { margin-top: 10px; }
.ctl-top { display: flex; align-items: center; gap: 6px; margin-bottom: 5px; }
.ctl-top label { color: var(--soft); font-size: 12px; flex: 1; }
.ctl-top .val { font-family: var(--mono); font-size: 12.5px; font-weight: 700; min-width: 70px; text-align: right; }
.nudge { width: 22px; height: 22px; border-radius: 6px; border: 1px solid var(--line); background: var(--surface); cursor: pointer; font-family: var(--mono); font-size: 13px; line-height: 1; color: var(--mute); }
.nudge:hover { color: var(--acc); border-color: var(--acc); }
input[type=range] { -webkit-appearance: none; appearance: none; width: 100%; height: 5px; border-radius: 3px; outline: none; cursor: pointer;
  background: linear-gradient(90deg, var(--acc) 0%, var(--violet) var(--p, 50%), var(--track) var(--p, 50%)); }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 15px; height: 15px; border-radius: 50%; background: #fff; box-shadow: 0 0 0 4px rgba(56,225,255,0.25), 0 2px 6px rgba(0,0,0,0.5); }
input[type=range]::-moz-range-thumb { width: 15px; height: 15px; border: 0; border-radius: 50%; background: #fff; box-shadow: 0 0 0 4px rgba(56,225,255,0.25); }
select { width: 100%; background: var(--surface-2); border: 1px solid var(--line); border-radius: 9px; padding: 8px 10px; font-size: 12px; cursor: pointer; }
select option { background: var(--panel-solid); }
.row { display: flex; align-items: center; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.row > * { flex: 1; }
.toggle { display: flex; align-items: center; justify-content: space-between; padding: 6px 0; cursor: pointer; user-select: none; gap: 10px; }
.toggle span { font-size: 12.5px; }
.toggle small { display: block; font-size: 10.5px; color: var(--mute); }
.sw { width: 34px; height: 20px; border-radius: 10px; background: var(--track); position: relative; transition: background .2s; flex-shrink: 0; }
.sw::after { content: ''; position: absolute; top: 3px; left: 3px; width: 14px; height: 14px; border-radius: 50%; background: #cfd8e6; transition: transform .2s; }
.toggle.on .sw { background: linear-gradient(90deg, var(--acc), var(--violet)); }
.toggle.on .sw::after { transform: translateX(14px); background: #fff; }

/* results */
.hero { border-radius: 14px; padding: 14px 16px; background: radial-gradient(120% 140% at 0% 0%, rgba(59,227,143,0.16), rgba(56,225,255,0.07) 55%, transparent); border: 1px solid var(--line-strong); }
.hero.bad { background: radial-gradient(120% 140% at 0% 0%, rgba(255,84,112,0.18), rgba(255,106,61,0.07) 55%, transparent); }
.hero .k { font-size: 10.5px; letter-spacing: 1.6px; text-transform: uppercase; color: var(--mute); font-weight: 700; }
.hero .v { font-family: var(--mono); font-size: 40px; font-weight: 700; line-height: 1.05; margin: 4px 0 2px; letter-spacing: -1px; }
.hero .v small { font-size: 15px; color: var(--mute); font-weight: 500; margin-left: 4px; letter-spacing: 0; }
.hero .sub { font-size: 11.5px; color: var(--soft); line-height: 1.5; }
.delta { font-family: var(--mono); font-size: 11px; font-weight: 700; padding: 2px 7px; border-radius: 6px; white-space: nowrap; }
.delta.up { color: var(--good); background: rgba(59,227,143,0.12); }
.delta.down { color: var(--bad); background: rgba(255,84,112,0.12); }
.delta.zero { color: var(--mute); background: var(--surface-2); }
.meter { margin-top: 12px; }
.meter .ml { display: flex; justify-content: space-between; font-size: 11px; color: var(--mute); margin-bottom: 5px; }
.meter .ml b { color: var(--text); font-family: var(--mono); }
.meter .bar { height: 8px; border-radius: 4px; background: var(--surface-2); overflow: hidden; }
.meter .bar i { display: block; height: 100%; border-radius: 4px; background: linear-gradient(90deg, var(--good), var(--amber) 80%, var(--bad)); background-size: var(--bw, 100%) 100%; transition: width .25s; }
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 12px; }
.stat { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 9px 11px; min-width: 0; }
.stat .k { font-size: 10.5px; color: var(--mute); font-weight: 600; display: flex; align-items: center; gap: 6px; }
.stat .k i { width: 7px; height: 7px; border-radius: 2px; display: inline-block; }
.stat .v { font-family: var(--mono); font-size: 16px; font-weight: 700; margin-top: 3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.stat .v small { font-size: 10.5px; color: var(--mute); font-weight: 500; margin-left: 2px; }
.stat .dd { margin-top: 3px; font-size: 10.5px; color: var(--mute); min-height: 14px; }
.stat.wide { grid-column: span 2; }
.note { font-size: 10.5px; color: var(--mute); line-height: 1.55; margin-top: 10px; }
.note b { color: var(--soft); }
.mini { width: 100%; height: 150px; display: block; border-radius: 10px; background: rgba(0,0,0,0.25); border: 1px solid var(--line); }

/* explain cards */
.explain { display: flex; flex-direction: column; gap: 8px; }
.ex { border: 1px solid var(--line); background: var(--surface); border-radius: 12px; padding: 10px 12px; }
.ex summary { cursor: pointer; font-weight: 700; font-size: 12px; list-style: none; display: flex; align-items: center; gap: 8px; }
.ex summary::-webkit-details-marker { display: none; }
.ex summary::before { content: '›'; color: var(--acc); font-family: var(--mono); transition: transform .2s; display: inline-block; }
.ex[open] summary::before { transform: rotate(90deg); }
.ex p { margin-top: 8px; font-size: 11.5px; line-height: 1.6; color: var(--soft); }
.ex p b { color: var(--text); }
.ex .eq { display: block; margin-top: 8px; font-family: var(--mono); font-size: 11.5px; color: var(--acc); background: rgba(56,225,255,0.06); border: 1px solid rgba(56,225,255,0.18); border-radius: 8px; padding: 6px 9px; }
body[data-level="basic"] [data-lvl]:not([data-lvl~="basic"]),
body[data-level="school"] [data-lvl]:not([data-lvl~="school"]),
body[data-level="adv"] [data-lvl]:not([data-lvl~="adv"]) { display: none; }

/* challenges */
.chal { display: flex; flex-direction: column; gap: 7px; }
.ch { display: grid; grid-template-columns: 22px 1fr; gap: 2px 10px; padding: 9px 11px; border-radius: 12px; border: 1px solid var(--line); background: var(--surface); transition: all .25s; }
.ch .tick { grid-row: span 2; width: 22px; height: 22px; border-radius: 7px; border: 1.5px solid var(--line-strong); display: grid; place-items: center; font-size: 12px; color: transparent; margin-top: 1px; }
.ch b { font-size: 12px; }
.ch span { font-size: 11px; color: var(--mute); line-height: 1.45; }
.ch.done { border-color: rgba(59,227,143,0.45); background: rgba(59,227,143,0.07); }
.ch.done .tick { background: var(--good); border-color: var(--good); color: #05080f; font-weight: 800; }
.ch.done b { color: var(--good); }
.chal-prog { display: flex; align-items: center; gap: 8px; font-family: var(--mono); font-size: 11px; color: var(--mute); margin-bottom: 8px; }
.chal-prog .bar { flex: 1; height: 4px; border-radius: 2px; background: var(--track); overflow: hidden; }
.chal-prog .bar i { display: block; height: 100%; background: linear-gradient(90deg, var(--acc), var(--violet)); transition: width .4s; }

#toast { position: fixed; top: 92px; left: 50%; transform: translateX(-50%) translateY(-10px); opacity: 0; z-index: 40; padding: 10px 18px; border-radius: 12px; background: var(--panel-solid); border: 1px solid rgba(59,227,143,0.5); font-size: 12.5px; transition: all .3s; pointer-events: none; box-shadow: 0 12px 40px rgba(0,0,0,0.5); }
#toast.on { opacity: 1; transform: translateX(-50%) translateY(0); }
.disclaimer { font-size: 10px; color: var(--mute); opacity: .75; line-height: 1.5; margin-top: 12px; }

@media (max-width: 1250px) {
  .lab { grid-template-columns: 290px minmax(0, 1fr); height: auto; }
  .lab > .stage { height: 62vh; min-height: 420px; }
  .lab > #right { grid-column: span 2; }
  .brand p { display: none; }
}
@media (max-width: 760px) {
  #topbar { margin: 10px 10px 0; top: 10px; padding: 10px; gap: 8px; }
  .lab { grid-template-columns: 1fr; padding: 10px; gap: 10px; }
  .lab > .stage { order: -1; height: 56vh; min-height: 360px; }
  .lab > #right { grid-column: auto; }
  .level span.lt { display: none; }
}