:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --panel-2: #eef1f4;
  --ink: #171a20;
  --muted: #5c6470;
  --faint: #939ba7;
  --border: #e4e7ec;
  --brand: #4f46e5;
  --brand-ink: #ffffff;
  --danger: #dc2626;
  --ok: #16a34a;
  --warn-bg: #fef3c7; --warn-ink: #92400e;
  --shadow: 0 1px 2px rgba(16,19,26,.05), 0 10px 30px rgba(16,19,26,.06);
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1216; --panel: #171b21; --panel-2: #1d222a; --ink: #e7eaef; --muted: #98a2b0;
    --faint: #6b7480; --border: #262b33; --brand: #6366f1; --danger: #f0685a; --ok: #4ade80;
    --warn-bg: #3a2f12; --warn-ink: #f0d488;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 12px 34px rgba(0,0,0,.4);
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink);
  font: 15px/1.6 var(--sans); -webkit-font-smoothing: antialiased; }
.hub { max-width: 860px; margin: 0 auto; padding: 0 20px 80px; }
h1, h2, h3 { letter-spacing: -0.02em; }
.muted { color: var(--muted); }
code { font-family: var(--mono); font-size: .86em; background: var(--panel-2);
  padding: .1em .4em; border-radius: 5px; }

/* hero */
.hero { padding: 52px 0 26px; }
.logo-row { display: flex; align-items: center; gap: 9px; font-weight: 700; font-size: 17px; }
.logo-row .logo { color: var(--brand); font-size: 22px; }
h1 { font-size: clamp(1.9rem, 5vw, 2.6rem); margin: 18px 0 12px; text-wrap: balance; }
.lede { font-size: 1.08rem; color: var(--muted); max-width: 60ch; }
.lede b { color: var(--ink); }
.stepper { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 22px;
  font-size: .82rem; color: var(--muted); }
.stepper .s { display: inline-flex; align-items: center; gap: 7px;
  background: var(--panel); border: 1px solid var(--border); border-radius: 999px; padding: 5px 12px; }
.stepper .s b { display: inline-grid; place-items: center; width: 18px; height: 18px; border-radius: 50%;
  background: var(--brand); color: var(--brand-ink); font-size: 11px; }
.stepper .arrow { color: var(--faint); }

/* context / where-it-lives note */
.context-note { margin: 22px 0 4px; background: color-mix(in srgb, var(--brand) 7%, var(--panel));
  border: 1px solid color-mix(in srgb, var(--brand) 22%, var(--border)); border-left: 3px solid var(--brand);
  border-radius: 0 12px 12px 0; padding: 14px 16px; }
.context-note .cn-label { font-family: var(--mono); font-size: .68rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--brand); font-weight: 700; }
.context-note p { margin: 6px 0 0; font-size: .92rem; color: var(--muted); max-width: 64ch; }
.context-note b { color: var(--ink); }

/* steps */
.step { padding: 30px 0 6px; border-top: 1px solid var(--border); margin-top: 26px; }
.step-head { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.step-num { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 50%;
  background: var(--ink); color: var(--bg); font-weight: 700; font-size: 15px; flex: 0 0 auto; }
.step-head h2 { font-size: 1.35rem; margin: 0; }
.step-intro { color: var(--muted); max-width: 64ch; margin: 4px 0 18px; }
.step-intro b { color: var(--ink); }
.hint { color: var(--muted); font-size: .9rem; margin-top: 14px; }
.hint b { color: var(--ink); }

/* sample app window */
.window { border: 1px solid var(--border); border-radius: 14px; overflow: hidden;
  box-shadow: var(--shadow); background: var(--panel); }
.window-bar { display: flex; align-items: center; gap: 7px; padding: 10px 14px;
  background: var(--panel-2); border-bottom: 1px solid var(--border); }
.window-bar .dot { width: 11px; height: 11px; border-radius: 50%; }
.dot.r { background: #ec6a5e; } .dot.y { background: #f4bf4f; } .dot.g { background: #61c554; }
.window-title { margin-left: 10px; font-family: var(--mono); font-size: .74rem; color: var(--muted); }
.window-body { padding: 20px 22px; }
.app-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; margin-bottom: 16px; }
.app-head h3 { margin: 0; font-size: 1.15rem; }
.app-head .muted { font-size: .85rem; margin: 2px 0 0; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 16px; }
.stat { background: var(--bg); border: 1px solid var(--border); border-radius: 10px; padding: 11px 13px; }
.stat-label { font-size: 11px; color: var(--faint); text-transform: uppercase; letter-spacing: .05em; }
.stat-value { font-size: 19px; font-weight: 700; margin-top: 3px; }
.stat-value .cur { font-size: 11px; color: var(--faint); margin-left: 4px; }
.rows { display: flex; flex-direction: column; gap: 9px; }
.row { display: flex; align-items: center; justify-content: space-between; gap: 14px;
  padding: 11px 13px; border: 1px solid var(--border); border-radius: 10px; }
.row b { font-size: .93rem; }

/* buttons */
.btn { font: inherit; font-size: 14px; font-weight: 600; padding: 8px 15px; border-radius: 9px;
  border: 1px solid var(--border); background: var(--panel); color: var(--ink); cursor: pointer; }
.btn:hover { border-color: var(--faint); }
.btn.sm { padding: 5px 11px; font-size: 13px; }
.btn.primary { background: var(--brand); border-color: var(--brand); color: var(--brand-ink); }
.btn.primary:hover { filter: brightness(1.06); }
.btn.ghost { background: transparent; }

/* feature grid */
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
@media (max-width: 640px) { .feature-grid { grid-template-columns: 1fr; } .stats { grid-template-columns: 1fr 1fr; } }
.feature-card { background: var(--panel); border: 1px solid var(--border); border-radius: 14px;
  padding: 18px 18px 20px; box-shadow: var(--shadow); display: flex; flex-direction: column; }
.feature-card.flagship { border-color: color-mix(in srgb, var(--brand) 40%, var(--border));
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--brand) 20%, transparent), var(--shadow); }
.fc-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.fc-icon { font-size: 22px; }
.fc-tag { font-size: .66rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  color: var(--brand); background: color-mix(in srgb, var(--brand) 12%, transparent);
  padding: 3px 8px; border-radius: 999px; }
.feature-card h3 { margin: 0 0 6px; font-size: 1.08rem; }
.fc-what { margin: 0 0 8px; font-size: .9rem; color: var(--muted); }
.fc-what b { color: var(--ink); }
.fc-when { margin: 0 0 14px; font-size: .84rem; color: var(--faint); }
.fc-when b { color: var(--muted); }
.feature-card .btn { align-self: flex-start; margin-top: auto; }
.fc-note { font-size: .78rem; color: var(--faint); margin: 9px 0 0; }
.kbd-row { display: flex; align-items: center; gap: 6px; margin-top: auto; }
.kbd-row span { color: var(--faint); font-size: 13px; }
kbd { font-family: var(--mono); font-size: .8rem; background: var(--panel-2);
  border: 1px solid var(--border); border-bottom-width: 2px; border-radius: 6px; padding: 3px 8px; }
.steps-list { margin: auto 0 0; padding-left: 18px; font-size: .84rem; color: var(--muted); }
.steps-list li { margin: 3px 0; }

/* step 3 cta */
.cta-row { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-top: 4px; }
.creds { font-size: .85rem; color: var(--muted); }
.creds code { font-size: .82em; }

/* fits footer */
.fits { margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--border); }
.fits-title { font-family: var(--mono); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--faint); margin-bottom: 12px; }
.fits-flow { display: flex; align-items: stretch; gap: 10px; flex-wrap: wrap; }
.fits-node { display: flex; flex-direction: column; gap: 2px; background: var(--panel);
  border: 1px solid var(--border); border-radius: 10px; padding: 10px 14px; font-weight: 600; font-size: .9rem; }
.fits-node small { font-weight: 400; font-family: var(--mono); font-size: .68rem; color: var(--faint); }
.fits-arr { display: flex; align-items: center; color: var(--faint); font-family: var(--mono); font-size: .72rem; }

/* toast */
.toast { position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: #1c1917; color: #fff; padding: 11px 18px; border-radius: 10px; font-size: 14px;
  box-shadow: 0 8px 30px rgba(0,0,0,.25); opacity: 0; pointer-events: none;
  transition: opacity .2s, transform .2s; z-index: 9000; }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.error { background: var(--danger); }
a { color: var(--brand); }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; border-radius: 4px; }