/* hwstack.ai — Power Architect's site. Tokens and type follow the app's shell
   (docs/ui-reference/shell-spec.md §2–3) so the site and the app read as one product. */

:root {
  --surface: #eeece7;
  --panel: #f7f5f1;
  --inset: #fbfaf8;
  --band: #f2f0eb;
  --chip: #eae7e1;
  --avatar: #ddd8ce;
  --ink: #1e1c18;
  --ink-fg: #f7f5f1;
  --text: #1e1c18;
  --text-mid: #3c3831;
  --text-soft: #6e6a63;
  --text-dim: #8b8579;
  --hairline: rgba(20, 18, 14, .07);
  --border: rgba(20, 18, 14, .1);
  --control: rgba(20, 18, 14, .14);
  --progress: #6f8199;
  --pass: #3f8f5f;
  --pass-text: #2f7048;
  --warn: #b8823a;
  --block: #c0503f;
  --block-text: #9c3f31;
  --shadow: 0 1px 2px rgba(20, 18, 14, .04), 0 18px 50px rgba(20, 18, 14, .08);
  --shot-shadow: 0 2px 6px rgba(20, 18, 14, .05), 0 30px 80px rgba(20, 18, 14, .14);
  --sans: "Instrument Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --surface: #101011;
    --panel: #17171a;
    --inset: #1b1b1d;
    --band: #1e1e21;
    --chip: #26262a;
    --avatar: #2e2e31;
    --ink: #e9e9eb;
    --ink-fg: #17171a;
    --text: #eaeaec;
    --text-mid: #c2c2c6;
    --text-soft: #8a8a8e;
    --text-dim: #76767a;
    --hairline: rgba(255, 255, 255, .06);
    --border: rgba(255, 255, 255, .09);
    --control: rgba(255, 255, 255, .13);
    --progress: #7d90ad;
    --pass: #63b382;
    --pass-text: #7fc79a;
    --warn: #c9a06a;
    --block: #d4705e;
    --block-text: #d4705e;
    --shadow: none;
    --shot-shadow: 0 30px 90px rgba(0, 0, 0, .55);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --surface: #101011;
  --panel: #17171a;
  --inset: #1b1b1d;
  --band: #1e1e21;
  --chip: #26262a;
  --avatar: #2e2e31;
  --ink: #e9e9eb;
  --ink-fg: #17171a;
  --text: #eaeaec;
  --text-mid: #c2c2c6;
  --text-soft: #8a8a8e;
  --text-dim: #76767a;
  --hairline: rgba(255, 255, 255, .06);
  --border: rgba(255, 255, 255, .09);
  --control: rgba(255, 255, 255, .13);
  --progress: #7d90ad;
  --pass: #63b382;
  --pass-text: #7fc79a;
  --warn: #c9a06a;
  --block: #d4705e;
  --block-text: #d4705e;
  --shadow: none;
  --shot-shadow: 0 30px 90px rgba(0, 0, 0, .55);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--surface);
  color: var(--text);
  font: 400 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration-color: var(--control); text-underline-offset: 3px; }
a:hover { text-decoration-color: currentColor; }
code, .mono { font-family: var(--mono); font-size: .88em; }
:focus-visible { outline: 2px solid var(--progress); outline-offset: 3px; border-radius: 6px; }

.wrap { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.wrap.narrow { max-width: 760px; }
@media (max-width: 640px) { .wrap { padding: 0 16px; } }

.skip { position: absolute; left: -9999px; top: 8px; }
.skip:focus { left: 16px; z-index: 100; background: var(--panel); padding: 8px 12px; border-radius: 8px; }

/* ── Header ─────────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.site-header.scrolled { border-bottom-color: var(--hairline); }
.site-header .wrap { display: flex; align-items: center; gap: 24px; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; font-size: 15px; letter-spacing: -.01em; text-decoration: none; white-space: nowrap; }
.brand-mark {
  width: 26px; height: 26px; border-radius: 7px; display: grid; place-items: center;
  background: var(--ink); color: var(--ink-fg); font: 600 10.5px/1 var(--sans); letter-spacing: .02em;
}
.nav { display: flex; gap: 22px; margin-left: 8px; font-size: 14px; color: var(--text-soft); }
.nav a { text-decoration: none; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--text); }
.header-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }
@media (max-width: 760px) { .nav { display: none; } }

.theme-toggle {
  width: 34px; height: 34px; border-radius: 8px; border: 1px solid var(--border);
  background: transparent; color: var(--text-soft); display: grid; place-items: center; cursor: pointer;
}
.theme-toggle:hover { color: var(--text); border-color: var(--control); }
.theme-toggle svg { width: 16px; height: 16px; }

/* ── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  height: 44px; padding: 0 20px; border-radius: 9px; border: 1px solid transparent;
  font: 500 15px/1 var(--sans); text-decoration: none; cursor: pointer; white-space: nowrap;
  transition: transform .15s, background-color .15s, border-color .15s;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--ink); color: var(--ink-fg); }
.btn-primary:hover { background: color-mix(in srgb, var(--ink) 86%, var(--surface)); }
.btn-secondary { background: transparent; color: var(--text); border-color: var(--control); }
.btn-secondary:hover { border-color: var(--text-soft); }
.btn-sm { height: 34px; padding: 0 14px; font-size: 13.5px; border-radius: 8px; }
.btn svg { width: 17px; height: 17px; flex: none; }
.btn-sm svg { width: 15px; height: 15px; }

.release-meta { font: 400 12.5px/1.5 var(--mono); color: var(--text-dim); margin-top: 12px; }
.release-meta [data-release] { color: var(--text-soft); }

/* ── Type helpers ───────────────────────────────────────── */
.eyebrow { font: 600 11px/1 var(--sans); letter-spacing: .09em; text-transform: uppercase; color: var(--text-dim); margin: 0 0 14px; }
.pill {
  display: inline-flex; align-items: center; gap: 8px; height: 28px; padding: 0 12px; border-radius: 20px;
  background: var(--chip); color: var(--text-mid); font: 500 12.5px/1 var(--sans);
}
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--warn); }
.lede { font-size: clamp(17px, 1.6vw, 19px); line-height: 1.6; color: var(--text-soft); max-width: 640px; }

/* ── Hero ───────────────────────────────────────────────── */
.hero { padding: 72px 0 0; }
.hero h1 {
  font-weight: 600; font-size: clamp(38px, 6vw, 64px); line-height: 1.04; letter-spacing: -.035em;
  margin: 22px 0 20px; max-width: 880px;
}
.hero h1 .soft { color: var(--text-dim); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-shot { margin-top: 56px; }

.shot {
  border-radius: 14px; border: 1px solid var(--border); overflow: hidden; background: var(--panel);
  box-shadow: var(--shot-shadow);
}
.shot img { width: 100%; }
.shot-light, .shot-dark { display: block; }
.shot-dark { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .shot-light { display: none; }
  :root:not([data-theme="light"]) .shot-dark { display: block; }
}
:root[data-theme="dark"] .shot-light { display: none; }
:root[data-theme="dark"] .shot-dark { display: block; }
.shot-caption { font-size: 13px; color: var(--text-dim); margin-top: 14px; }
.hero .shot-caption { text-align: center; }

/* ── Audience strip ─────────────────────────────────────── */
.audience { padding: 72px 0 8px; }
.audience-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.audience-card { background: var(--panel); border: 1px solid var(--border); border-radius: 11px; padding: 22px 24px; box-shadow: var(--shadow); }
.audience-card h3 { font-size: 15px; font-weight: 600; margin: 0 0 6px; letter-spacing: -.01em; }
.audience-card p { margin: 0; font-size: 14.5px; color: var(--text-soft); line-height: 1.55; }
@media (max-width: 860px) { .audience-grid { grid-template-columns: 1fr; } }

/* ── Sections ───────────────────────────────────────────── */
.section { padding: 112px 0 0; }
.section-head { max-width: 720px; margin-bottom: 48px; }
.section h2 { font-weight: 600; font-size: clamp(28px, 3.6vw, 40px); line-height: 1.12; letter-spacing: -.028em; margin: 0 0 16px; }
.section-head p { margin: 0; color: var(--text-soft); font-size: 17px; }

.feature { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 56px; align-items: center; padding: 56px 0; border-top: 1px solid var(--hairline); }
.feature:first-of-type { border-top: 0; padding-top: 0; }
.feature.flip > .feature-text { order: 2; }
.feature h3 { font-weight: 600; font-size: clamp(22px, 2.4vw, 28px); line-height: 1.2; letter-spacing: -.022em; margin: 0 0 14px; }
.feature p { color: var(--text-soft); margin: 0 0 18px; }
.feature ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; font-size: 14.5px; color: var(--text-mid); }
.feature li { position: relative; padding-left: 22px; }
.feature li::before { content: ""; position: absolute; left: 4px; top: .62em; width: 6px; height: 6px; border-radius: 50%; background: var(--pass); }
.feature .num { font: 500 12px/1 var(--mono); color: var(--text-dim); margin-bottom: 16px; display: block; }
@media (max-width: 900px) {
  .feature, .feature.flip { grid-template-columns: 1fr; gap: 28px; padding: 44px 0; }
  .feature.flip > .feature-text { order: 0; }
}

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.chip { font: 400 12px/1 var(--mono); padding: 7px 10px; border-radius: 20px; background: var(--chip); color: var(--text-mid); }

/* ── How it works ───────────────────────────────────────── */
.flow { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: 0; align-items: stretch; }
.flow-card { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 26px; box-shadow: var(--shadow); display: flex; flex-direction: column; }
.flow-card.home { background: var(--inset); }
.flow-card h3 { font-size: 16px; font-weight: 600; margin: 0 0 4px; letter-spacing: -.01em; }
.flow-card .where { font: 400 12px/1.4 var(--mono); color: var(--text-dim); margin: 0 0 16px; }
.flow-card ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; font-size: 14.5px; color: var(--text-mid); }
.flow-card li { padding-left: 18px; position: relative; }
.flow-card li::before { content: ""; position: absolute; left: 2px; top: .62em; width: 6px; height: 6px; border-radius: 50%; background: var(--text-dim); }
.flow-card.home li::before { background: var(--pass); }
.flow-card .foot { margin-top: auto; padding-top: 18px; font-size: 13px; color: var(--text-soft); }
.flow-arrow { display: grid; place-items: center; padding: 0 10px; color: var(--text-dim); }
.flow-arrow svg { width: 36px; height: 14px; }
.flow-arrow span { display: block; font: 400 11px/1.3 var(--mono); text-align: center; margin-top: 6px; max-width: 90px; }
@media (max-width: 900px) {
  .flow { grid-template-columns: 1fr; gap: 0; }
  .flow-arrow { padding: 10px 0; }
  .flow-arrow svg { transform: rotate(90deg); }
}
.flow-note { margin: 22px 0 0; font-size: 14px; color: var(--text-soft); max-width: 760px; }

/* ── Download ───────────────────────────────────────────── */
.download-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 14px; box-shadow: var(--shadow);
  padding: 48px; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 48px; align-items: start;
}
.download-card h2 { margin-bottom: 12px; }
.download-card .lede { font-size: 16.5px; }
@media (max-width: 900px) { .download-card { grid-template-columns: 1fr; padding: 28px 22px; gap: 28px; } }

.note {
  border: 1px solid var(--border); border-left: 3px solid var(--warn); background: var(--inset);
  border-radius: 10px; padding: 18px 20px; font-size: 14.5px; color: var(--text-mid);
}
.note h3 { margin: 0 0 8px; font-size: 14px; font-weight: 600; color: var(--text); }
.note p { margin: 0 0 10px; }
.note p:last-child { margin-bottom: 0; }
.note + .note { margin-top: 12px; }
.note.neutral { border-left-color: var(--progress); }
.kbd { font: 500 12.5px/1 var(--sans); padding: 3px 7px; border-radius: 6px; border: 1px solid var(--control); background: var(--panel); white-space: nowrap; }

.specs { display: grid; grid-template-columns: auto 1fr; gap: 6px 18px; margin: 22px 0 0; font-size: 14px; }
.specs dt { color: var(--text-dim); }
.specs dd { margin: 0; color: var(--text-mid); }

/* ── Steps (download page) ──────────────────────────────── */
.page { padding: 64px 0 0; }
.page h1 { font-weight: 600; font-size: clamp(32px, 4.6vw, 48px); line-height: 1.08; letter-spacing: -.03em; margin: 18px 0 16px; }
.steps { list-style: none; padding: 0; margin: 48px 0 0; counter-reset: step; display: grid; gap: 12px; }
.step { counter-increment: step; display: grid; grid-template-columns: 44px 1fr; gap: 18px; background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 24px; box-shadow: var(--shadow); }
.step::before {
  content: counter(step); width: 32px; height: 32px; border-radius: 50%; background: var(--chip); color: var(--text-mid);
  display: grid; place-items: center; font: 600 13px/1 var(--mono);
}
.step h2 { font-size: 18px; font-weight: 600; letter-spacing: -.015em; margin: 3px 0 8px; }
.step p { margin: 0 0 10px; color: var(--text-soft); font-size: 15px; }
.step p:last-child { margin-bottom: 0; }
.step figure { margin: 16px 0 4px; }
.step figure img { border-radius: 10px; border: 1px solid var(--border); max-width: min(100%, 560px); }
.step figcaption { font-size: 12.5px; color: var(--text-dim); margin-top: 8px; }
@media (max-width: 560px) { .step { grid-template-columns: 1fr; gap: 10px; padding: 20px 18px; } }

/* ── Welcome ────────────────────────────────────────────── */
.welcome { min-height: calc(100vh - 60px - 120px); display: grid; place-items: center; padding: 64px 0; }
.welcome-card { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; box-shadow: var(--shadow); padding: 44px; max-width: 620px; width: 100%; }
.welcome-card h1 { font-weight: 600; font-size: clamp(28px, 4vw, 36px); line-height: 1.12; letter-spacing: -.028em; margin: 18px 0 12px; }
.welcome-card p { color: var(--text-soft); margin: 0 0 14px; }
.welcome-card ol { margin: 18px 0 26px; padding-left: 20px; color: var(--text-mid); display: grid; gap: 8px; }
.status-icon { width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; background: color-mix(in srgb, var(--pass) 16%, transparent); color: var(--pass); }
.status-icon.warn { background: color-mix(in srgb, var(--warn) 18%, transparent); color: var(--warn); }
.status-icon svg { width: 22px; height: 22px; }
.who { font: 400 13px/1.4 var(--mono); color: var(--text-mid); background: var(--chip); border-radius: 7px; padding: 6px 10px; display: inline-block; margin-bottom: 6px; word-break: break-all; }
[hidden] { display: none !important; }
@media (max-width: 560px) { .welcome-card { padding: 28px 20px; } }

/* ── Legal pages ────────────────────────────────────────── */
.draft-banner {
  margin: 0 0 28px; padding: 14px 18px; border-radius: 10px; border: 1px solid color-mix(in srgb, var(--block) 45%, transparent);
  background: color-mix(in srgb, var(--block) 9%, transparent); color: var(--block-text); font-size: 14px; font-weight: 500;
}
.legal { padding: 56px 0 0; }
.legal h1 { font-weight: 600; font-size: clamp(30px, 4vw, 40px); letter-spacing: -.028em; line-height: 1.1; margin: 0 0 8px; }
.legal .updated { color: var(--text-dim); font-size: 14px; margin: 0 0 32px; }
.legal h2 { font-size: 19px; font-weight: 600; letter-spacing: -.015em; margin: 40px 0 10px; }
.legal p, .legal li { color: var(--text-mid); font-size: 15.5px; }
.legal ul { padding-left: 20px; display: grid; gap: 6px; }
.legal table { width: 100%; border-collapse: collapse; font-size: 14px; margin: 14px 0; background: var(--panel); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; display: block; overflow-x: auto; }
.legal th, .legal td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--hairline); vertical-align: top; }
.legal th { background: var(--band); font-weight: 600; color: var(--text); white-space: nowrap; }
.legal tr:last-child td { border-bottom: 0; }
.todo { background: color-mix(in srgb, var(--warn) 22%, transparent); color: var(--text); padding: 0 4px; border-radius: 4px; }

/* ── Footer ─────────────────────────────────────────────── */
.site-footer { margin-top: 120px; border-top: 1px solid var(--hairline); padding: 32px 0 48px; font-size: 13.5px; color: var(--text-dim); }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 14px 28px; align-items: center; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 20px; margin-left: auto; }
.site-footer a { text-decoration: none; color: var(--text-soft); }
.site-footer a:hover { color: var(--text); }