/* Neuroplatform Sandbox — calm, research-focused theme */
:root {
  --bg: #eef3f6; --surface: #ffffff; --surface-2: #f8fafb; --ink: #16202a; --ink-2: #4a5866; --ink-3: #8593a0;
  --line: #e1e6eb; --line-2: #eef1f4; --accent: #1f6f78; --accent-ink: #ffffff; --accent-soft: #e4f1f2; --accent-2: #2f7fb5;
  --warn-bg: #fbf3e4; --warn-ink: #6b4b12; --warn-line: #f0dfb8; --err: #b42318;
  --o1: #3B6FE0; --o2: #E08A2B; --o3: #2E9E6B; --o4: #C9418E; --stim: #D23B3B; --det: #374151;
  --radius: 12px; --shadow: 0 1px 2px rgba(22,32,42,.04), 0 6px 20px -12px rgba(22,32,42,.12);
  --font: "Inter", -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); background-image: radial-gradient(900px 500px at 8% -10%, rgba(31,111,120,.16), transparent 60%), radial-gradient(800px 500px at 100% 0%, rgba(47,127,181,.13), transparent 60%), radial-gradient(700px 500px at 60% 110%, rgba(201,65,142,.08), transparent 60%); background-attachment: fixed; color: var(--ink); font: 14.5px/1.55 var(--font); -webkit-font-smoothing: antialiased; font-feature-settings: "tnum", "cv11"; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
code, pre { font-family: var(--mono); font-size: 12.5px; }
pre { background: var(--surface-2); border: 1px solid var(--line); padding: 14px 16px; border-radius: 10px; overflow-x: auto; line-height: 1.5; }
h1, h2, h3, h4 { letter-spacing: -0.01em; font-weight: 600; }
h1 { font-size: 30px; margin: 0 0 8px; } h2 { font-size: 18px; margin: 0 0 10px; }
h3 { font-size: 12px; margin: 0 0 10px; color: var(--ink-3); text-transform: uppercase; letter-spacing: .08em; font-weight: 600; }
p { margin: 0 0 10px; }
.muted { color: var(--ink-3); font-weight: 400; } .small { font-size: 12.5px; } .err { color: var(--err); }

/* banner + header */
.banner { background: var(--warn-bg); color: var(--warn-ink); text-align: center; padding: 6px 16px; font-size: 12.5px; border-bottom: 1px solid var(--warn-line); }
header.top { display: flex; align-items: center; justify-content: space-between; padding: 12px 28px; background: rgba(255,255,255,.85); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); flex-wrap: wrap; gap: 8px; position: sticky; top: 0; z-index: 20; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 600; font-size: 15.5px; }
.brand:hover { text-decoration: none; }
.brand svg { width: 26px; height: 26px; }
.brand span { color: var(--ink-3); font-weight: 400; }
nav { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
nav a { color: var(--ink-2); padding: 6px 10px; border-radius: 8px; font-weight: 500; }
nav a:hover { background: var(--line-2); text-decoration: none; }
nav a.on { color: var(--accent); background: var(--accent-soft); }
form.inline { display: inline; }
button.link { background: none; border: 0; color: var(--ink-3); cursor: pointer; font: inherit; padding: 6px 10px; border-radius: 8px; }
button.link:hover { background: var(--line-2); }

/* layout */
main { padding: 24px 28px 40px; max-width: 1500px; margin: 0 auto; }
main.narrow { max-width: 880px; } main.wide { max-width: 1720px; } main.full { max-width: none; padding: 0; }
footer { color: var(--ink-3); font-size: 12px; text-align: center; padding: 28px; }
.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin: 4px 0 18px; flex-wrap: wrap; }
.page-head h1 { font-size: 26px; margin: 0; color: #12444a; }
.page-head p { color: var(--ink-2); margin: 4px 0 0; max-width: 70ch; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; margin-bottom: 16px; box-shadow: var(--shadow); }
.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.row { display: flex; align-items: center; gap: 12px; } .between { justify-content: space-between; }

/* controls */
.btn { display: inline-flex; align-items: center; gap: 6px; background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 9px; padding: 9px 16px; font: inherit; font-weight: 600; cursor: pointer; transition: background .15s, transform .05s; }
.btn:hover { background: #185a62; text-decoration: none; } .btn:active { transform: translateY(1px); } .btn:disabled { opacity: .6; cursor: default; }
.btn.small { padding: 6px 12px; font-size: 13px; }
.btn.ghost { background: transparent; color: var(--ink-2); border: 1px solid var(--line); } .btn.ghost:hover { background: var(--line-2); color: var(--ink); }
.btn.light { background: #fff; color: var(--ink); } .btn.light:hover { background: #eef2f5; }
label { display: block; margin: 8px 0; color: var(--ink-2); font-size: 13px; font-weight: 500; }
label input, label select { display: block; width: 100%; margin-top: 4px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; font: inherit; color: var(--ink); background: #fff; font-weight: 400; transition: border-color .15s, box-shadow .15s; }
label input:focus, label select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
label.switch { display: flex; align-items: center; gap: 8px; } label.switch input { width: auto; display: inline; margin: 0; accent-color: var(--accent); }
input[type=range] { accent-color: var(--accent); }
.note { background: var(--accent-soft); border-radius: 10px; padding: 12px 16px; color: var(--ink-2); }

/* live page */
.live-stack { display: grid; gap: 16px; }
.controls { display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: 16px; }
.controls .card { padding: 16px 18px; margin: 0; border-top: 3px solid var(--accent); }
.controls .card:nth-child(2) { border-top-color: #E08A2B; } .controls .card:nth-child(3) { border-top-color: #D23B3B; }
.controls .card:nth-child(4) { border-top-color: #2E9E6B; } .controls .card:nth-child(5) { border-top-color: #3B6FE0; }
.controls .card:nth-child(6) { border-top-color: #C9418E; } .controls .card:nth-child(7) { border-top-color: #7cc6cf; }
.card.strip { margin: 0; }
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 12px; font-size: 13px; }
.stats b { display: block; font-size: 22px; font-weight: 600; color: var(--accent); font-variant-numeric: tabular-nums; } .stats span { color: var(--ink-3); font-size: 12px; }
.sliders label { display: grid; grid-template-columns: 96px 1fr 46px; align-items: center; gap: 8px; margin: 6px 0; }
.sliders input[type=range] { width: 100%; margin: 0; } .sliders output { font-size: 12px; color: var(--ink-2); text-align: right; font-variant-numeric: tabular-nums; }
.legend { display: flex; gap: 12px; font-size: 12px; color: var(--ink-2); flex-wrap: wrap; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 5px; vertical-align: -1px; }

/* tables, tiles, charts */
.tbl { border-collapse: collapse; width: 100%; font-size: 13px; font-variant-numeric: tabular-nums; }
.tbl th, .tbl td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line-2); white-space: nowrap; }
.tbl th { color: var(--ink-3); font-weight: 500; font-size: 12px; letter-spacing: .02em; }
.tbl tbody tr:hover { background: var(--surface-2); }
.scroll { overflow-x: auto; }
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 10px; margin-top: 10px; }
.tile { border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; background: linear-gradient(180deg, #fff, var(--accent-soft)); }
.tile b { display: block; font-size: 22px; font-weight: 600; font-variant-numeric: tabular-nums; color: var(--accent); } .tile span { color: var(--ink-3); font-size: 12px; }
.charts { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.charts .card.full { grid-column: 1 / -1; }
.plot { width: 100%; }
.form { max-width: 480px; }
.prog { height: 6px; background: var(--line-2); border-radius: 3px; overflow: hidden; width: 140px; display: inline-block; vertical-align: middle; }
.prog i { display: block; height: 100%; background: var(--accent); transition: width .4s; }

/* login */
.login { max-width: 400px; margin: 48px auto; padding: 28px; }
.login h2 { font-size: 22px; margin-bottom: 4px; }

/* landing */
body.landing { background: #0b1520; background-image: radial-gradient(1000px 600px at 80% 10%, rgba(31,111,120,.35), transparent 60%), radial-gradient(800px 500px at 10% 90%, rgba(47,127,181,.25), transparent 60%); background-attachment: fixed; color: #e8eef3; }
body.landing header.top { background: rgba(11,21,32,.6); border-bottom-color: rgba(255,255,255,.08); }
body.landing .brand, body.landing nav a, body.landing button.link { color: #dfe7ee; } body.landing .brand span { color: #8aa0b2; }
body.landing nav a:hover, body.landing button.link:hover { background: rgba(255,255,255,.08); }
body.landing nav a.on { background: #7cc6cf; color: #0b1520; } body.landing nav a.on:hover { background: #93d3da; }
body.landing .banner { background: rgba(255,255,255,.06); color: #cfd9e2; border-bottom-color: rgba(255,255,255,.08); }
body.landing footer { color: #7d90a2; }
.hero { position: relative; min-height: 78vh; display: flex; align-items: center; overflow: hidden; }
.hero canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.hero .veil { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(11,21,32,.82) 0%, rgba(11,21,32,.55) 45%, rgba(11,21,32,.15) 100%), linear-gradient(180deg, rgba(11,21,32,0) 70%, rgba(11,21,32,1) 100%); pointer-events: none; }
.hero .inner { position: relative; max-width: 1180px; margin: 0 auto; padding: 72px 28px; }
.eyebrow { color: #7cc6cf; font-size: 12.5px; letter-spacing: .14em; text-transform: uppercase; font-weight: 600; margin-bottom: 14px; }
.hero h1 { font-size: clamp(34px, 5vw, 58px); line-height: 1.05; margin: 0 0 18px; max-width: 16ch; color: #f4f8fb; letter-spacing: -0.02em; }
.hero .lead { font-size: 18px; color: #b9c8d5; max-width: 60ch; line-height: 1.6; margin-bottom: 26px; }
.hero .cta { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.hero .cta .btn { padding: 11px 20px; font-size: 15px; }
.hero .cta .btn.ghost { color: #dfe7ee; border-color: rgba(255,255,255,.25); } .hero .cta .btn.ghost:hover { background: rgba(255,255,255,.08); }
.hero .facts { display: flex; gap: 28px; margin-top: 40px; flex-wrap: wrap; }
.hero .facts div b { display: block; font-size: 22px; color: #f4f8fb; font-variant-numeric: tabular-nums; } .hero .facts div span { color: #8aa0b2; font-size: 12.5px; }
.band { max-width: 1180px; margin: 0 auto; padding: 56px 28px; }
.band h2 { font-size: 28px; margin: 0 0 8px; color: #f4f8fb; letter-spacing: -0.02em; }
.band .sub { color: #9fb1c1; font-size: 16px; max-width: 70ch; margin-bottom: 28px; }
.band.light { background: linear-gradient(180deg, #eef5f6 0%, #f6f4fa 100%); color: var(--ink); max-width: none; padding: 0; }
.band.light .inner { max-width: 1180px; margin: 0 auto; padding: 56px 28px; }
.band.light h2 { color: var(--ink); } .band.light .sub { color: var(--ink-2); }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.glass { background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.09); border-radius: 14px; padding: 22px; }
.glass h4 { margin: 8px 0 8px; font-size: 16px; color: #f4f8fb; } .glass p { color: #a9bac9; margin: 0; font-size: 14px; }
.glass .ic { width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center; background: rgba(124,198,207,.14); color: #7cc6cf; }
.paper { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 22px; box-shadow: var(--shadow); }
.paper h4 { margin: 6px 0 8px; font-size: 16px; } .paper p { color: var(--ink-2); margin: 0; font-size: 14px; }
.paper .num { color: var(--accent); font-family: var(--mono); font-size: 12px; letter-spacing: .06em; }
.flow { display: grid; grid-template-columns: repeat(6, 1fr); gap: 10px; align-items: stretch; }
.flow .step { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 14px; position: relative; }
.flow .step b { display: block; font-size: 13.5px; margin-bottom: 4px; } .flow .step span { color: var(--ink-3); font-size: 12.5px; line-height: 1.4; display: block; }
.flow .step::after { content: "→"; position: absolute; right: -13px; top: 14px; color: var(--ink-3); font-size: 16px; }
.flow .step:last-child::after { content: "↺"; right: -16px; color: var(--accent); }
.principles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.principles div { border-top: 2px solid #7cc6cf; padding-top: 12px; }
.principles b { display: block; color: #f4f8fb; margin-bottom: 6px; } .principles p { color: #a9bac9; font-size: 13.5px; margin: 0; }
.cta-band { text-align: center; padding: 64px 28px; background: linear-gradient(180deg, rgba(124,198,207,.06), rgba(124,198,207,.0)); }
.cta-band h2 { font-size: 26px; color: #f4f8fb; margin-bottom: 8px; } .cta-band p { color: #9fb1c1; margin-bottom: 22px; }
.models { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.models .paper ul { margin: 8px 0 0; padding-left: 18px; color: var(--ink-2); font-size: 13.5px; } .models .paper li { margin: 3px 0; }
.tag { display: inline-block; font-size: 11.5px; padding: 3px 8px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); font-weight: 600; letter-spacing: .03em; }
@media (max-width: 1000px) { .cols, .charts, .grid3, .grid2, .models { grid-template-columns: 1fr; } .flow { grid-template-columns: repeat(2, 1fr); } .flow .step::after { display: none; } .principles { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .principles { grid-template-columns: 1fr; } .flow { grid-template-columns: 1fr; } main { padding: 16px; } .hero .inner { padding: 48px 20px; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* findings + narrative */
.findings { margin: 4px 0 14px; padding-left: 20px; } .findings li { margin: 4px 0; } .findings li.sub { list-style: none; margin-left: 4px; color: var(--ink-2); }
.narrative { border-top: 1px solid var(--line-2); padding-top: 12px; }
.narrative-text { white-space: pre-wrap; line-height: 1.6; max-width: 80ch; margin: 8px 0; }
.narrative-text.ready { color: var(--ink); background: var(--surface-2); border-left: 3px solid var(--accent); padding: 10px 14px; border-radius: 0 8px 8px 0; }

/* admin */
.tbl td.actions { white-space: nowrap; } .tbl td.actions form, .tbl td.actions details { display: inline-block; margin-right: 6px; vertical-align: middle; }
.tbl td.actions details summary { list-style: none; cursor: pointer; color: var(--ink-3); padding: 6px 10px; border-radius: 8px; display: inline-block; }
.tbl td.actions details summary::-webkit-details-marker { display: none; } .tbl td.actions details summary:hover { background: var(--line-2); }
.tbl td.actions details form { display: flex; gap: 6px; margin-top: 6px; } .tbl td.actions details input { padding: 6px 8px; border: 1px solid var(--line); border-radius: 8px; font: inherit; }
.tbl td.wrap { white-space: normal; max-width: 60ch; font-family: var(--mono); font-size: 12px; color: var(--ink-2); }
button.link.danger { color: var(--err); }