/* TrueUp web app: the landing page, the docs viewer and the wizard. Light and dark themes via [data-theme]. */
:root, [data-theme="light"] {
  --bg: #f6f7fb; --bg-2: #eef0f7; --card: #ffffff; --card-2: #f8f9fc; --line: #e3e6ef; --line-2: #d4d8e5;
  --text: #151a2d; --muted: #5a6178; --dim: #8a90a6;
  --accent: #4f46e5; --accent-2: #6366f1; --accent-soft: #eef0ff; --accent-ink: #ffffff;
  --ok: #0f9d6b; --ok-soft: #e6f7ef; --warn: #b7791f; --warn-soft: #fdf4e3; --bad: #d03a3a; --bad-soft: #fdecec;
  --shadow: 0 1px 2px rgba(20, 24, 45, .05), 0 8px 24px rgba(20, 24, 45, .06);
  --hero: radial-gradient(1200px 400px at 10% -10%, #e4e5ff 0%, transparent 60%), radial-gradient(900px 400px at 110% 0%, #dff5ee 0%, transparent 55%);
  --code: #f1f3f9;
}
[data-theme="dark"] {
  --bg: #0c0f1a; --bg-2: #121628; --card: #151a2d; --card-2: #1a2036; --line: #262d47; --line-2: #333b5a;
  --text: #e9ecf6; --muted: #a2a9c2; --dim: #707895;
  --accent: #818cf8; --accent-2: #a5b4fc; --accent-soft: #1f2447; --accent-ink: #0c0f1a;
  --ok: #34d399; --ok-soft: #10352b; --warn: #fbbf24; --warn-soft: #3a2e12; --bad: #f87171; --bad-soft: #3d1a1d;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 12px 32px rgba(0, 0, 0, .35);
  --hero: radial-gradient(1200px 400px at 10% -10%, #232867 0%, transparent 60%), radial-gradient(900px 400px at 110% 0%, #0f3b33 0%, transparent 55%);
  --code: #0f1322;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--text); font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
       -webkit-font-smoothing: antialiased; transition: background .2s, color .2s; }
button { font: inherit; color: inherit; }
.hidden { display: none !important; }

/* ---------- top bar */
header { position: sticky; top: 0; z-index: 10; backdrop-filter: blur(10px); background: color-mix(in srgb, var(--bg) 82%, transparent);
         border-bottom: 1px solid var(--line); }
.bar-in { max-width: 1080px; margin: 0 auto; padding: 12px 24px; display: flex; align-items: center; gap: 20px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; letter-spacing: -.3px; cursor: pointer; }
.logo .mark { width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center; color: #fff;
              background: linear-gradient(135deg, var(--accent), #10b981); font-size: 17px; }
.steps { display: flex; gap: 4px; margin-left: 12px; flex-wrap: wrap; }
.steps button { border: 0; background: none; color: var(--dim); padding: 6px 10px; border-radius: 99px; font-size: 13.5px; font-weight: 600; cursor: default; }
.steps button .n { display: inline-grid; place-items: center; width: 20px; height: 20px; border-radius: 50%; margin-right: 6px; font-size: 11.5px;
                   background: var(--bg-2); color: var(--dim); }
.steps button.done { color: var(--muted); cursor: pointer; }
.steps button.done .n { background: var(--ok-soft); color: var(--ok); }
.steps button.on { color: var(--accent); background: var(--accent-soft); }
.steps button.on .n { background: var(--accent); color: var(--accent-ink); }
.steps button:disabled { opacity: .55; }
.right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.icon-btn { width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--line); background: var(--card); cursor: pointer;
            display: grid; place-items: center; font-size: 17px; box-shadow: var(--shadow); }
.icon-btn:hover { border-color: var(--accent); }
.link { background: none; border: 0; color: var(--muted); cursor: pointer; font-size: 14px; padding: 6px; }
.link:hover { color: var(--accent); }

/* ---------- layout */
main { max-width: 900px; margin: 0 auto; padding: 36px 24px 80px; }
.screen { animation: in .25s ease; }
@keyframes in { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .screen { animation: none; } * { transition: none !important; } }
.eyebrow { color: var(--accent); font-weight: 700; font-size: 13px; letter-spacing: .6px; text-transform: uppercase; margin-bottom: 6px; }
h1 { font-size: 34px; line-height: 1.15; letter-spacing: -.6px; margin: 0 0 10px; }
h2 { font-size: 22px; letter-spacing: -.3px; margin: 0 0 6px; }
h3 { font-size: 16px; margin: 0; }
.lead { color: var(--muted); font-size: 17px; margin: 0 0 24px; max-width: 680px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 22px; box-shadow: var(--shadow); }
.explain { display: flex; gap: 12px; align-items: flex-start; background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
           border-radius: 12px; padding: 14px 16px; color: var(--text); font-size: 14.5px; margin: 0 0 20px; }
.explain .i { font-size: 18px; line-height: 1.3; }
.explain b { color: var(--accent); }
.nav { display: flex; align-items: center; gap: 12px; margin-top: 26px; }
.nav .grow { flex: 1; }
.btn { border: 0; border-radius: 12px; padding: 12px 20px; font-weight: 650; font-size: 15.5px; cursor: pointer; background: var(--accent); color: var(--accent-ink);
       box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 30%, transparent); transition: transform .08s, filter .15s; }
.btn:hover { filter: brightness(1.06); }
.btn:active { transform: translateY(1px); }
.btn:disabled { background: var(--line-2); color: var(--dim); box-shadow: none; cursor: not-allowed; }
.btn.big { padding: 15px 26px; font-size: 17px; }
.btn.ghost { background: var(--card); color: var(--text); border: 1px solid var(--line-2); box-shadow: none; }
.btn.ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn.danger { background: var(--card); color: var(--bad); border: 1px solid var(--line-2); box-shadow: none; }
.btn.small { padding: 7px 12px; font-size: 13.5px; border-radius: 9px; }
.pill { display: inline-block; padding: 2px 9px; border-radius: 99px; font-size: 12.5px; font-weight: 600; background: var(--bg-2); color: var(--muted); white-space: nowrap; }
.pill.ok { background: var(--ok-soft); color: var(--ok); } .pill.warn { background: var(--warn-soft); color: var(--warn); }
.pill.bad { background: var(--bad-soft); color: var(--bad); } .pill.acc { background: var(--accent-soft); color: var(--accent); }
.err { color: var(--bad); font-size: 14px; white-space: pre-line; }
.muted { color: var(--muted); } .small { font-size: 13.5px; }

/* ---------- shared by the landing page */
.how { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 28px 0 30px; }
.how > div { background: var(--card-2); border: 1px solid var(--line); border-radius: 14px; padding: 16px; }
.how b { display: block; margin: 6px 0 2px; } .how span { color: var(--muted); font-size: 14px; }
.how .num { width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); font-weight: 800; }
.finds { display: flex; flex-wrap: wrap; gap: 8px; margin: -8px 0 26px; }
.finds span { background: var(--card-2); border: 1px solid var(--line); border-radius: 99px; padding: 5px 12px; font-size: 13.5px; color: var(--muted); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.trust { margin-top: 18px; color: var(--dim); font-size: 13.5px; }

/* ---------- choice cards */
.choices { display: grid; gap: 14px; }
.choice { display: flex; gap: 16px; align-items: flex-start; text-align: left; width: 100%; background: var(--card); border: 2px solid var(--line);
          border-radius: 16px; padding: 18px 20px; cursor: pointer; box-shadow: var(--shadow); transition: border-color .15s, transform .08s; }
.choice:hover { border-color: var(--accent); }
.choice .ic { width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; font-size: 22px; background: var(--accent-soft); flex: none; }
.choice b { display: block; font-size: 17px; margin-bottom: 3px; }
.choice span { color: var(--muted); font-size: 14.5px; }
.choice .go { margin-left: auto; color: var(--accent); font-size: 20px; align-self: center; }

/* ---------- upload */
.drop { border: 2px dashed var(--line-2); border-radius: 16px; padding: 38px 20px; text-align: center; cursor: pointer; background: var(--card);
        transition: .15s; }
.drop:hover, .drop.over { border-color: var(--accent); background: var(--accent-soft); }
.drop .big-ic { font-size: 34px; }
.drop b { font-size: 17px; }
.types { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; margin-top: 10px; }
.file { display: flex; align-items: center; gap: 14px; padding: 12px 14px; border: 1px solid var(--line); border-radius: 12px; background: var(--card); margin-top: 8px; }
.file .fi { width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center; background: var(--bg-2); font-size: 18px; flex: none; }
.file .nm { font-weight: 650; word-break: break-all; }
.file .fd { color: var(--muted); font-size: 13.5px; }
.file .x { margin-left: auto; border: 0; background: none; color: var(--dim); font-size: 20px; cursor: pointer; padding: 4px 8px; border-radius: 8px; }
.file .x:hover { color: var(--bad); background: var(--bad-soft); }

/* ---------- plans */
.plan { display: flex; gap: 14px; align-items: flex-start; padding: 16px 18px; border: 2px solid var(--line); border-radius: 14px; background: var(--card);
        margin-top: 10px; cursor: pointer; }
.plan.on { border-color: color-mix(in srgb, var(--accent) 55%, transparent); }
.plan .ic { width: 42px; height: 42px; border-radius: 11px; display: grid; place-items: center; background: var(--accent-soft); font-size: 20px; flex: none; }
.plan .t { font-weight: 700; } .plan .h { color: var(--muted); font-size: 14.5px; margin-top: 2px; } .plan .r { color: var(--dim); font-size: 13px; margin-top: 4px; }
.switch { margin-left: auto; width: 46px; height: 27px; border-radius: 99px; background: var(--line-2); position: relative; flex: none; transition: .15s; }
.switch::after { content: ""; position: absolute; top: 3px; left: 3px; width: 21px; height: 21px; border-radius: 50%; background: #fff; transition: .15s; box-shadow: 0 1px 3px rgba(0,0,0,.25); }
.plan.on .switch { background: var(--accent); } .plan.on .switch::after { left: 22px; }

/* ---------- datasets */
.group { margin: 22px 0 8px; font-weight: 700; font-size: 14px; color: var(--muted); }
.group span { font-weight: 500; color: var(--dim); }
.ds-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 10px; }
.ds { text-align: left; background: var(--card); border: 2px solid var(--line); border-radius: 14px; padding: 14px; cursor: pointer; display: flex; flex-direction: column; gap: 6px; }
.ds:hover { border-color: var(--accent); }
.ds.sel { border-color: var(--accent); background: var(--accent-soft); }
.ds:disabled { opacity: .5; cursor: not-allowed; }
.ds .t { font-weight: 700; font-size: 14.5px; } .ds .d { color: var(--muted); font-size: 13px; } .ds .s { color: var(--dim); font-size: 12px; }

/* ---------- learning */
.learn { text-align: center; padding: 40px 30px; }
.ring { width: 150px; height: 150px; margin: 0 auto 18px; position: relative; }
.ring svg { transform: rotate(-90deg); }
.ring .p { position: absolute; inset: 0; display: grid; place-items: center; font-size: 32px; font-weight: 800; letter-spacing: -1px; }
.ring circle { fill: none; stroke-width: 11; }
.ring .bg { stroke: var(--bg-2); } .ring .fg { stroke: var(--accent); stroke-linecap: round; transition: stroke-dashoffset .5s ease; }
.ring.done .fg { stroke: var(--ok); } .ring.failed .fg { stroke: var(--bad); }
.now { font-size: 19px; font-weight: 650; min-height: 30px; }
.why { color: var(--muted); max-width: 560px; margin: 6px auto 0; font-size: 15px; min-height: 48px; }
.phases { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin: 26px 0 8px; text-align: left; }
.phase { border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; font-size: 13.5px; color: var(--dim); background: var(--card-2); }
.phase b { display: block; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .5px; }
.phase.on { border-color: var(--accent); color: var(--text); } .phase.on b { color: var(--accent); }
.phase.done { color: var(--muted); } .phase.done b { color: var(--ok); }
details.tech { margin-top: 18px; text-align: left; }
details.tech summary { cursor: pointer; color: var(--muted); font-size: 14px; }
.log { background: var(--code); border: 1px solid var(--line); border-radius: 10px; font: 12.5px/1.55 ui-monospace, SFMono-Regular, Menlo, monospace;
       padding: 12px 14px; max-height: 260px; overflow: auto; margin-top: 10px; white-space: pre-wrap; color: var(--muted); }
.log .ok { color: var(--ok); } .log .warn { color: var(--warn); } .log .error { color: var(--bad); }

/* ---------- results */
.done-hero { display: flex; gap: 18px; align-items: center; background: linear-gradient(135deg, var(--ok-soft), var(--card)); border: 1px solid var(--line);
             border-radius: 18px; padding: 24px; box-shadow: var(--shadow); }
.done-hero .ck { width: 58px; height: 58px; border-radius: 16px; background: var(--ok); color: #fff; display: grid; place-items: center; font-size: 30px; flex: none; }
.done-hero h1 { font-size: 28px; margin: 0; }
.done-hero .btn { margin-left: auto; white-space: nowrap; flex: none; }
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin: 18px 0; }
.tile { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px; box-shadow: var(--shadow); }
.tile .v { font-size: 28px; font-weight: 800; letter-spacing: -.5px; }
.tile .l { color: var(--muted); font-size: 14px; }
.tile.hot .v { color: var(--bad); } .tile.warm .v { color: var(--warn); } .tile.good .v { color: var(--ok); }
.score-row { display: grid; grid-template-columns: 1fr 180px 70px; gap: 12px; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--line); }
.score-row:last-child { border-bottom: 0; }
.meter { height: 8px; background: var(--bg-2); border-radius: 99px; overflow: hidden; }
.meter div { height: 100%; background: var(--accent); border-radius: 99px; }
.meter.ok div { background: var(--ok); } .meter.bad div { background: var(--bad); }
.run { border: 1px solid var(--line); border-radius: 14px; background: var(--card); margin-top: 10px; overflow: hidden; }
.run > summary { list-style: none; cursor: pointer; padding: 14px 16px; display: flex; gap: 12px; align-items: center; }
.run > summary::-webkit-details-marker { display: none; }
.run > summary .ic { width: 36px; height: 36px; border-radius: 10px; background: var(--accent-soft); display: grid; place-items: center; flex: none; }
.run > summary .hl { color: var(--muted); font-size: 13.5px; }
.run .body { padding: 0 16px 16px; }
.kinds { display: flex; flex-wrap: wrap; gap: 6px; margin: 4px 0 10px; }
.kinds button { border: 1px solid var(--line-2); background: var(--card); border-radius: 99px; padding: 4px 11px; font-size: 13px; cursor: pointer; color: var(--muted); }
.kinds button.on { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th { text-align: left; color: var(--dim); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .4px; padding: 8px; border-bottom: 1px solid var(--line); }
td { padding: 9px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
td.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
td.src { color: var(--dim); font-size: 12px; font-family: ui-monospace, Menlo, monospace; }
.tablewrap { max-height: 460px; overflow: auto; border: 1px solid var(--line); border-radius: 10px; }
.tablewrap table { min-width: 760px; }

/* ---------- ask */
.ask-box { display: flex; gap: 10px; background: var(--card); border: 1px solid var(--line-2); border-radius: 16px; padding: 8px; box-shadow: var(--shadow); }
.ask-box input { flex: 1; border: 0; background: transparent; font: inherit; font-size: 17px; padding: 10px 12px; color: var(--text); outline: none; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 6px; }
.chip { border: 1px solid var(--line-2); background: var(--card); color: var(--muted); border-radius: 99px; padding: 7px 13px; font-size: 14px; cursor: pointer; }
.chip:hover { border-color: var(--accent); color: var(--accent); }
.answer { margin-top: 16px; }
.answer .q { font-weight: 700; color: var(--accent); margin-bottom: 6px; }
.answer .a { font-size: 17px; }
.answer .meta { color: var(--dim); font-size: 13px; margin: 8px 0; display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.answer details summary { cursor: pointer; color: var(--muted); font-size: 14px; margin: 6px 0; }
.empty { color: var(--dim); text-align: center; padding: 22px; }
.app-foot { text-align: center; color: var(--dim); font-size: 13px; padding: 10px 0 30px; }

@media (max-width: 860px) {
  .steps button .t { display: none; }
  .steps { flex-wrap: nowrap; margin-left: 4px; }
  .steps button { padding: 6px 4px; }
  .steps button .n { margin-right: 0; }
}
@media (max-width: 400px) { .steps { display: none; } }
@media (max-width: 640px) {
  .bar-in { padding: 10px 14px; gap: 8px; }
  .logo { font-size: 18px; } .logo .mark { width: 28px; height: 28px; }
  main { padding: 22px 14px 60px; }
  h1 { font-size: 27px; } .lead { font-size: 16px; }
  .how { grid-template-columns: 1fr; gap: 10px; }
  .phases { grid-template-columns: 1fr 1fr; }
  .hero-actions .btn { width: 100%; }
  .done-hero { flex-wrap: wrap; } .done-hero .btn { margin-left: 0; width: 100%; }
  .score-row { grid-template-columns: 1fr 90px; } .score-row > div:last-child { grid-column: 1 / -1; }
  .nav { flex-wrap: wrap; } .nav .btn.big { width: 100%; }
  .choice { padding: 14px; } .choice .go { display: none; }
}

/* ======================================================================== the site: landing page + docs */
/* body[data-mode] is set by go(): "site" for the landing page and docs, "app" for the wizard. */
[data-mode="site"] main, [data-mode="site"] .steps, [data-mode="site"] .app-foot, [data-mode="site"] .app-only { display: none !important; }
[data-mode="app"] .site-nav, [data-mode="app"] .site-only { display: none !important; }
[data-mode="site"] .bar-in { max-width: 1180px; }
.site-nav { display: flex; gap: 2px; margin-left: 18px; }
.site-nav button { border: 0; background: none; color: var(--muted); padding: 7px 11px; border-radius: 9px; font-size: 14.5px; font-weight: 600; cursor: pointer; }
.site-nav button:hover { color: var(--accent); background: var(--accent-soft); }
.menu-btn, .site-nav .menu-only { display: none; }
.screen.site { animation: none; }

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.wrap.narrow { max-width: 820px; }
.band { padding: 76px 0; }
.alt-band { background: var(--bg-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 760px; margin-bottom: 30px; }
.section-head.center { text-align: center; margin-left: auto; margin-right: auto; }
.h2 { font-size: 34px; line-height: 1.15; letter-spacing: -.6px; margin: 0 0 10px; }
.h3 { font-size: 18px; letter-spacing: -.2px; margin: 0; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font: .9em ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--code); border: 1px solid var(--line); border-radius: 6px; padding: 1px 5px; }

/* ---------- hero */
.hero-band { background: var(--hero); padding: 70px 0 64px; border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: 48px; align-items: center; }
.display { font-size: 56px; line-height: 1.04; letter-spacing: -1.6px; margin: 0 0 18px; }
.hero-band .lead { font-size: 19px; }
.hero-band .finds { margin: 0 0 28px; }
.resume { margin-top: 16px; padding: 10px 14px; border-radius: 12px; background: var(--ok-soft); color: var(--text); font-size: 14.5px; display: inline-block; }
.demo { padding: 0; overflow: hidden; }
.demo-head { display: flex; align-items: center; gap: 6px; padding: 11px 14px; border-bottom: 1px solid var(--line); background: var(--card-2); }
.demo-head .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--line-2); }
.demo-head .muted { margin-left: 8px; font-family: ui-monospace, Menlo, monospace; font-size: 12px; }
.demo-sum { padding: 16px 18px 6px; font-size: 15px; }
.demo-row { display: flex; gap: 12px; align-items: flex-start; padding: 11px 18px; border-top: 1px solid var(--line); font-size: 14.5px; }
.demo-row:first-of-type { border-top: 0; }
.demo-row .pill { flex: none; width: 134px; text-align: center; margin-top: 1px; }
.demo-row .src { color: var(--dim); font: 12px ui-monospace, Menlo, monospace; margin-top: 2px; }
.demo-foot { padding: 12px 18px 16px; border-top: 1px solid var(--line); background: var(--card-2); }

/* ---------- proof */
.proof-band { padding: 34px 0; border-bottom: 1px solid var(--line); }
.proof { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.proof .v { font-size: 38px; font-weight: 800; letter-spacing: -1px; color: var(--accent); }
.proof .l { color: var(--muted); font-size: 14.5px; }
.proof-note { margin-top: 18px; }

/* ---------- how */
.how-3 { margin: 0 0 22px; }
.how-3 > div { background: var(--card); box-shadow: var(--shadow); padding: 20px; }
.pillars { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.pillars > div { border: 1px solid var(--line); border-radius: 14px; padding: 18px; }
.pillars .pi { font-size: 22px; } .pillars b { display: block; margin: 6px 0 4px; } .pillars span { color: var(--muted); font-size: 14px; }

/* ---------- call to action bands */
.cta-band { padding: 0 0 20px; }
.cta-row { display: flex; gap: 24px; align-items: center; justify-content: space-between; background: var(--accent-soft);
           border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent); border-radius: 18px; padding: 26px 30px; }
.cta-row p { margin: 4px 0 0; }
.cta-actions { display: flex; gap: 10px; flex: none; }

/* ---------- use cases */
.uses { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.use { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 20px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 10px; }
.use-top { display: flex; gap: 12px; align-items: center; }
.use-top .ic { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; font-size: 22px; background: var(--accent-soft); flex: none; }
.use .who { color: var(--dim); font-size: 13px; }
.use dl { margin: 0; font-size: 14.5px; }
.use dt { font-weight: 700; font-size: 12px; text-transform: uppercase; letter-spacing: .5px; color: var(--dim); margin-top: 6px; }
.use dd { margin: 2px 0 0; }
.proof-line { font-size: 13.5px; background: var(--ok-soft); border-radius: 10px; padding: 7px 10px; }
.limit-line { font-size: 13px; color: var(--muted); }
.use-actions { margin-top: auto; padding-top: 6px; display: flex; gap: 14px; align-items: center; justify-content: space-between; }
.use-actions .more { font-size: 14px; font-weight: 600; }

/* ---------- get started */
.tabs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.tabs button { border: 1px solid var(--line-2); background: var(--card); color: var(--muted); border-radius: 99px; padding: 8px 15px; font-size: 14.5px; font-weight: 600; cursor: pointer; }
.tabs button:hover { color: var(--accent); border-color: var(--accent); }
.tabs button.on { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.tab-panel { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 24px 26px; box-shadow: var(--shadow); }
.tab-panel > p:first-child { margin-top: 0; }
.steps-list > div { display: flex; gap: 14px; margin-bottom: 16px; }
.steps-list > div > div { min-width: 0; flex: 1; }
.sn { width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); font-weight: 800; flex: none; }
pre.code, .doc pre { position: relative; background: var(--code); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; margin: 10px 0;
                     overflow: auto; font: 13.5px/1.6 ui-monospace, SFMono-Regular, Menlo, monospace; }
pre code { background: none; border: 0; padding: 0; font-size: inherit; white-space: pre; }
pre.code.out { color: var(--muted); font-size: 12.5px; border-style: dashed; }
pre.code.out::before { content: "output"; display: block; font: 700 11px/1 -apple-system, sans-serif; letter-spacing: .6px; text-transform: uppercase; color: var(--dim); margin-bottom: 8px; }
.copy { position: absolute; top: 8px; right: 8px; border: 1px solid var(--line-2); background: var(--card); color: var(--muted); border-radius: 8px;
        padding: 3px 9px; font-size: 12px; cursor: pointer; opacity: .85; }
.copy:hover { color: var(--accent); border-color: var(--accent); opacity: 1; }

/* ---------- docs on the landing page */
.doc-groups { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.doc-group .group { margin: 0 0 8px; }
.doc-card { display: block; border: 1px solid var(--line); background: var(--card); border-radius: 12px; padding: 12px 14px; margin-bottom: 8px; color: var(--text); }
.doc-card:hover { border-color: var(--accent); text-decoration: none; }
.doc-card b { display: block; font-size: 14.5px; } .doc-card span { color: var(--muted); font-size: 13px; }

/* ---------- faq */
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: 14px; margin-bottom: 10px; }
.faq summary { cursor: pointer; padding: 16px 20px; font-weight: 650; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font-size: 20px; line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin: 0; padding: 0 20px 18px; color: var(--muted); }

/* ---------- final call to action + footer */
.final { text-align: center; padding: 48px 30px; background: var(--hero), var(--card); border-radius: 22px; }
.final .lead { margin-left: auto; margin-right: auto; }
.hero-actions.center { justify-content: center; }
.site-foot { border-top: 1px solid var(--line); padding: 36px 0 44px; font-size: 14px; }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 24px; }
.foot-grid > div > b { display: block; margin-bottom: 8px; font-size: 13px; text-transform: uppercase; letter-spacing: .5px; color: var(--dim); }
.foot-grid a { display: block; color: var(--muted); margin-bottom: 6px; }
.small-logo { font-size: 17px; cursor: default; } .small-logo .mark { width: 26px; height: 26px; font-size: 14px; }

/* ---------- docs viewer */
.docs-layout { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 40px; padding-top: 30px; padding-bottom: 80px; }
.docs-nav { position: sticky; top: 78px; align-self: start; max-height: calc(100vh - 100px); overflow: auto; font-size: 14px; }
.docs-nav .back { padding: 0 0 10px; }
.docs-nav .group { margin: 16px 0 6px; font-size: 12px; text-transform: uppercase; letter-spacing: .5px; color: var(--dim); }
.docs-nav a { display: block; padding: 6px 10px; border-radius: 8px; color: var(--muted); }
.docs-nav a:hover { color: var(--accent); text-decoration: none; background: var(--accent-soft); }
.docs-nav a.on { color: var(--accent); background: var(--accent-soft); font-weight: 650; }
.doc { max-width: 820px; min-width: 0; font-size: 16px; }
.doc h1 { font-size: 36px; margin-bottom: 16px; }
.doc h2 { font-size: 24px; margin: 36px 0 10px; padding-top: 6px; border-top: 1px solid var(--line); }
.doc h3 { font-size: 18px; margin: 26px 0 8px; }
.doc h2, .doc h3 { scroll-margin-top: 80px; }
.doc p, .doc li { color: var(--text); }
.doc img { max-width: 100%; border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); margin: 8px 0; }
.doc blockquote { margin: 14px 0; padding: 4px 16px; border-left: 3px solid var(--accent); background: var(--accent-soft); border-radius: 0 10px 10px 0; }
.doc hr { border: 0; border-top: 1px solid var(--line); margin: 28px 0; }
.doc .doc-table { max-height: none; margin: 12px 0; }
.doc .doc-table table { min-width: 0; }
.doc-foot { display: flex; justify-content: space-between; align-items: center; margin-top: 40px; padding-top: 18px; border-top: 1px solid var(--line); }

@media (max-width: 1020px) {
  .site-nav button { padding: 7px 7px; font-size: 13.5px; }
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .proof, .pillars, .doc-groups, .uses { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  .site-nav { display: none; }
  [data-mode="site"] .menu-btn { display: grid; }
  .menu-open .site-nav { display: flex; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; margin: 0; padding: 8px 12px 14px;
                         background: var(--bg); border-bottom: 1px solid var(--line); box-shadow: var(--shadow); }
  .menu-open .site-nav button { text-align: left; padding: 12px; font-size: 16px; }
  .menu-open .site-nav .menu-only { display: block; color: var(--accent); }
  .docs-layout { grid-template-columns: 1fr; gap: 10px; }
  .docs-nav { position: static; max-height: none; border-bottom: 1px solid var(--line); padding-bottom: 12px; }
  .docs-nav .group, .docs-nav a { display: inline-block; margin-right: 4px; }
  .docs-nav .group { display: block; }
  .cta-row { flex-direction: column; align-items: flex-start; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .band { padding: 48px 0; }
  .wrap { padding: 0 16px; }
  .display { font-size: 36px; letter-spacing: -1px; }
  .h2 { font-size: 27px; }
  .hero-band { padding: 40px 0; }
  .proof, .pillars, .doc-groups, .uses { grid-template-columns: 1fr; }
  .proof .v { font-size: 30px; }
  .demo-row { flex-direction: column; gap: 4px; } .demo-row .pill { width: auto; }
  .cta-actions { flex-direction: column; width: 100%; } .cta-actions .btn { width: 100%; }
  .tab-panel { padding: 18px 16px; }
  .tabs { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 4px; } .tabs button { flex: none; }
  .steps-list .sn { display: none; }
  #open-app { display: none; }
  .doc h1 { font-size: 28px; }
}

/* ---------------------------------------------------------------- use a saved model */
.apply-step { display: flex; align-items: center; gap: 10px; margin: 28px 0 10px; }
.apply-step .sn { width: 28px; height: 28px; border-radius: 99px; display: grid; place-items: center; background: var(--accent); color: #fff; font-size: 14px; flex: none; }
.model-card { display: flex; gap: 14px; align-items: flex-start; padding: 14px 16px; border: 2px solid var(--line); border-radius: 14px; background: var(--card);
  margin-top: 8px; cursor: pointer; }
.model-card:hover { border-color: var(--accent); }
.model-card.on { border-color: var(--accent); background: var(--accent-soft); }
.model-card .ic { width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center; font-size: 19px; background: var(--bg-2); flex: none; }
.model-card .t { font-weight: 650; }
.model-card .h { color: var(--text); font-size: 14.5px; margin-top: 2px; }
.model-card .r { color: var(--muted); font-size: 13px; margin-top: 4px; }
.model-card .grow { flex: 1; min-width: 0; }
.model-card .model-actions { display: flex; gap: 4px; align-items: center; flex: none; }
.model-card .x { border: 0; background: none; color: var(--dim); font-size: 20px; cursor: pointer; padding: 4px 8px; border-radius: 8px; }
.model-card .x:hover { color: var(--bad); background: var(--bad-soft); }
.model-card .radio { width: 20px; height: 20px; border-radius: 99px; border: 2px solid var(--line-2); flex: none; align-self: center; }
.model-card.on .radio { border-color: var(--accent); box-shadow: inset 0 0 0 4px var(--card); background: var(--accent); }
.model-card .ic { background: var(--accent-soft); }
.done-hero .done-actions .btn { margin-left: 0; }
.apply-done .ck { font-size: 20px; }
.apply-done { display: flex; gap: 14px; align-items: center; margin: 26px 0 6px; }
.apply-done .ck { width: 40px; height: 40px; border-radius: 99px; display: grid; place-items: center; background: var(--ok-soft); color: var(--ok); font-weight: 800; flex: none; }
.open-run .run-head { display: flex; gap: 12px; align-items: center; padding: 14px 16px; }
.open-run .run-head h3 { margin: 0 0 2px; }
.open-run .run-head .ic { width: 36px; height: 36px; border-radius: 10px; background: var(--accent-soft); display: grid; place-items: center; flex: none; }
.open-run .run-head .hl { color: var(--muted); font-size: 13.5px; }
.done-actions { display: flex; flex-direction: column; gap: 8px; align-items: stretch; margin-left: auto; }
@media (max-width: 640px) { .model-card { flex-wrap: wrap; } .done-actions { margin-left: 0; width: 100%; } }
.apply-done .btn { white-space: nowrap; flex: none; }

/* how it works: the decision engine */
.engine-band { border-bottom: 1px solid var(--line); }
.engine { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 0 0 22px; }
.engine > div { background: var(--card-2); border: 1px solid var(--line); border-radius: 14px; padding: 18px; }
.engine b { display: block; margin: 10px 0 4px; font-size: 16.5px; } .engine span { color: var(--muted); font-size: 14.5px; }
.engine .ei { width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); }
.engine .ei svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.formats-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; margin: 6px 0 10px; font-size: 17px; }
.formats { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; margin: 0 0 22px; }
.formats > div { background: var(--card-2); border: 1px solid var(--line); border-radius: 14px; padding: 14px; display: flex; flex-direction: column; }
.formats b { margin: 8px 0 2px; } .formats span { color: var(--muted); font-size: 13.5px; flex: 1; }
.formats code { margin-top: 10px; font-size: 11.5px; color: var(--dim); word-break: break-all; }
.formats .ei { width: 32px; height: 32px; border-radius: 9px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); }
.formats .ei svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.versus-group { margin: 14px 0 2px; text-transform: uppercase; letter-spacing: .5px; font-weight: 700; font-size: 11.5px; }
.versus { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px; }
.versus-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; margin-bottom: 12px; font-size: 17px; }
.versus-row { display: grid; grid-template-columns: 150px 1fr 120px; align-items: center; gap: 12px; margin: 8px 0; font-size: 14.5px; }
.versus-row > b { text-align: right; white-space: nowrap; }
.versus-row .bar { height: 12px; border-radius: 99px; background: var(--line); overflow: hidden; }
.versus-row .bar i { display: block; height: 100%; min-width: 6px; border-radius: 99px; background: var(--dim); }
.versus-row.win .bar i { background: var(--accent); }
.versus-row.win > b { color: var(--accent); }
.versus p { margin: 12px 0 0; }
@media (max-width: 860px) {
  .engine { grid-template-columns: 1fr; gap: 10px; }
  .formats { grid-template-columns: 1fr 1fr; }
  .versus-row { grid-template-columns: 1fr auto; }
  .versus-row .bar { grid-column: 1 / -1; grid-row: 2; }
}