/* Clatterbox landing page
   Type: JetBrains Mono for display/keycap text, Inter for reading copy.
   Palette: warm anodized-orange accent against a cool graphite board. */

:root {
  --bg: #17181d;
  --bg-raised: #1e1f27;
  --bg-board: #101116;
  --ink: #f2efe9;
  --ink-dim: #b7b6bd;
  --muted: #86858f;
  --line: #34353f;
  --line-soft: #26272f;
  --accent: #cf6a37;
  --accent-ink: #1a0e07;
  --signal: #57d99a;
  --key: #24252e;
  --key-edge: #3a3b46;
  --radius-s: 6px;
  --radius-m: 10px;
  --font-display: "JetBrains Mono", ui-monospace, "SF Mono", Consolas, monospace;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #eeece5;
    --bg-raised: #f7f5ef;
    --bg-board: #1b1c22;
    --ink: #201f1c;
    --ink-dim: #55534e;
    --muted: #7a776f;
    --line: #d8d4c8;
    --line-soft: #e3dfd2;
    --accent: #b8501f;
    --accent-ink: #fff7ee;
    --signal: #1f8a5e;
    --key: #232430;
    --key-edge: #3c3d49;
  }
}

* { box-sizing: border-box; }
html { color-scheme: dark light; }
@media (prefers-color-scheme: light) { html { color-scheme: light dark; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
}

a { color: inherit; }
h1, h2, h3 { font-family: var(--font-display); margin: 0; letter-spacing: -0.01em; }
p { margin: 0; }
code { font-family: var(--font-display); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 3px;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* ---------- topbar ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line-soft);
}

.topbar-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
}

.brand-mark {
  color: var(--accent);
  font-size: 1.2rem;
}

.topnav {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 0.92rem;
}

.topnav a {
  text-decoration: none;
  color: var(--ink-dim);
}
.topnav a:hover { color: var(--ink); }

.topnav-cta {
  padding: 7px 14px;
  border-radius: var(--radius-s);
  background: var(--accent);
  color: var(--accent-ink) !important;
  font-weight: 600;
}

/* ---------- hero ---------- */

.hero {
  padding: 64px 20px 56px;
  display: grid;
  gap: 40px;
}

.kicker {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--accent);
  margin: 0 0 14px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.12;
  margin: 0 0 20px;
  max-width: 14ch;
}

.lede {
  font-size: 1.08rem;
  color: var(--ink-dim);
  max-width: 52ch;
  margin: 0 0 28px;
}

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  padding: 12px 20px;
  border-radius: var(--radius-s);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
}
.btn-primary:hover { filter: brightness(1.08); }

.btn-ghost {
  border-color: var(--line);
  color: var(--ink);
}
.btn-ghost:hover { border-color: var(--ink-dim); }

/* ---------- keyboard demo ---------- */

.board {
  background: var(--bg-board);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  padding: 18px;
  box-shadow: 0 30px 60px -35px rgba(0,0,0,0.6);
}

.board-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 14px;
}

.board-head-left {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 0.78rem;
  color: #d8d6cf;
}

.led {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--muted);
  display: inline-block;
  transition: background-color 120ms ease, box-shadow 120ms ease;
}
.led.is-live {
  background: var(--signal);
  box-shadow: 0 0 8px 1px var(--signal);
}

.pack-switch {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.pack-btn {
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--key-edge);
  background: transparent;
  color: #c9c8d0;
  cursor: pointer;
}
.pack-btn:hover { border-color: var(--accent); color: #fff; }
.pack-btn.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

.type-surface {
  width: 100%;
  resize: vertical;
  background: #0b0c10;
  color: #f0eee7;
  border: 1px solid var(--key-edge);
  border-radius: var(--radius-s);
  padding: 16px;
  font-family: var(--font-display);
  font-size: 1rem;
  line-height: 1.6;
}
.type-surface::placeholder { color: #55565f; }

.key-strip {
  display: flex;
  gap: 3px;
  margin-top: 10px;
  height: 20px;
  align-items: flex-end;
}

.key-strip .dot {
  flex: 1;
  height: 4px;
  border-radius: 2px;
  background: var(--key-edge);
  transition: height 70ms ease, background-color 70ms ease;
}
.key-strip .dot.hit {
  height: 18px;
  background: var(--accent);
}

.board-foot {
  margin-top: 12px;
  font-size: 0.8rem;
  color: var(--muted);
}

/* ---------- features ---------- */

.features { padding: 76px 20px; }
.features h2, .privacy h2, .build-pack h2, .download h2 {
  font-size: 1.7rem;
  margin-bottom: 32px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.feature {
  background: var(--bg-raised);
  padding: 26px 24px;
}

.feature-big {
  grid-column: span 2;
}

.feature h3 {
  font-size: 1.02rem;
  margin-bottom: 10px;
  font-weight: 700;
}
.feature-big h3 { font-size: 1.25rem; }

.feature p {
  color: var(--ink-dim);
  font-size: 0.94rem;
}

/* ---------- privacy ---------- */

.privacy {
  padding: 12px 20px 76px;
}

.privacy-inner {
  border-left: 3px solid var(--accent);
  padding-left: 28px;
}

.privacy-lede {
  color: var(--ink-dim);
  max-width: 62ch;
  margin-bottom: 24px;
}

.privacy-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
  max-width: 68ch;
}

.privacy-list li {
  color: var(--ink-dim);
  font-size: 0.98rem;
}
.privacy-list strong { color: var(--ink); }

/* ---------- build a pack ---------- */

.build-pack {
  padding: 20px 20px 80px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.build-pack-copy p {
  color: var(--ink-dim);
  max-width: 46ch;
  margin: 16px 0 20px;
}

.build-pack-notes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.build-pack-notes li {
  color: var(--ink-dim);
  font-size: 0.92rem;
  padding-left: 16px;
  border-left: 2px solid var(--line);
}

.pack-toml {
  background: var(--bg-board);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  padding: 22px;
  font-size: 0.85rem;
  line-height: 1.7;
  color: #d8d6cf;
  overflow-x: auto;
}
.pack-toml .c-com { color: var(--muted); }
.pack-toml .c-str { color: var(--signal); }
.pack-toml .c-sec { color: var(--accent); }

/* ---------- download ---------- */

.download {
  padding: 16px 20px 90px;
  text-align: left;
}

.download-lede {
  color: var(--ink-dim);
  margin-bottom: 28px;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 18px;
}

.download-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 20px;
  border-radius: var(--radius-m);
  border: 1px solid var(--line);
  text-decoration: none;
  color: var(--ink);
}
.download-card:hover { border-color: var(--accent); }

.download-os {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
}
.download-sub {
  color: var(--muted);
  font-size: 0.85rem;
}

.download-note {
  color: var(--muted);
  font-size: 0.84rem;
  max-width: 60ch;
}

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--line-soft);
  padding: 26px 20px 40px;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--muted);
}
.footer-row a { text-decoration: underline; text-underline-offset: 2px; }

/* ---------- responsive ---------- */

@media (min-width: 860px) {
  .hero {
    grid-template-columns: 1fr 1.1fr;
    align-items: center;
    padding: 92px 20px 80px;
  }
}

@media (max-width: 720px) {
  .feature-grid { grid-template-columns: 1fr; }
  .feature-big { grid-column: span 1; }
  .build-pack { grid-template-columns: 1fr; }
  .download-grid { grid-template-columns: 1fr; }
  .topnav { gap: 14px; font-size: 0.82rem; }
  .topnav a:not(.topnav-cta) { display: none; }
}

@media (max-width: 400px) {
  .board { padding: 14px; }
}