/* =========================================================================
   Kystek Launcher — marketing site
   Single dark theme, deliberately: the product itself has no light mode,
   so a site that only exists to sell people on installing it shouldn't
   promise a look the app doesn't deliver. Palette extends the app's own
   (see launcher/src/renderer/styles.css) rather than inventing a new one —
   #4a7ce8 is the app's actual accent color, not a marketing repaint.
   ========================================================================= */

:root {
  --bg: #0a0b16;
  --bg-panel: #12132a;
  --bg-raised: #181a30;
  --border: #22243d;
  --border-bright: #323463;
  --text: #e8e8f2;
  --text-muted: #9090b0;
  --text-faint: #55577a;
  --accent: #4a7ce8;
  --accent-bright: #6fa0ff;
  --accent-dim: #16213f;
  --success: #22c55e;
  --danger: #f87171;

  --font-display: 'IBM Plex Sans', -apple-system, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'Cascadia Code', Consolas, monospace;

  --measure: 65ch;
  --radius: 10px;
  --radius-sm: 6px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { color-scheme: dark; }

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

img { max-width: 100%; display: block; }

a { color: var(--accent-bright); }
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent-bright);
  outline-offset: 2px;
}

h1, h2, h3 { text-wrap: balance; font-weight: 600; letter-spacing: -0.01em; }

.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-bright);
}

/* ── Status bar (echoes the app's own custom titlebar) ────────────────── */
.statusbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 44px;
  padding: 0 20px;
  border-bottom: 1px solid var(--border);
  background: #08091380;
  backdrop-filter: blur(6px);
  position: sticky;
  top: 0;
  z-index: 50;
}
.statusbar .brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text);
  text-decoration: none;
}
.statusbar .brand img { width: 18px; height: 18px; border-radius: 4px; }
.statusbar nav { display: flex; gap: 22px; }
.statusbar nav a {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-muted);
  text-decoration: none;
}
.statusbar nav a:hover { color: var(--text); }

/* ── Layout ─────────────────────────────────────────────────────────── */
main { display: flex; flex-direction: column; }

.section {
  padding: 88px 24px;
  border-bottom: 1px solid var(--border);
}
.section-inner { max-width: 1040px; margin: 0 auto; }
.section-narrow { max-width: var(--measure); margin: 0 auto; }

.section-head { margin-bottom: 40px; max-width: 560px; }
.section-head h2 { font-size: clamp(24px, 3vw, 30px); margin-top: 10px; }
.section-head p { color: var(--text-muted); margin-top: 10px; font-size: 15px; }

/* ── Hero ───────────────────────────────────────────────────────────── */
.hero {
  padding: 96px 24px 80px;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(700px 420px at 82% -10%, var(--accent-dim), transparent 65%);
}
.hero-inner {
  max-width: 1040px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 56px;
  align-items: center;
}
.hero h1 {
  font-size: clamp(32px, 4.6vw, 52px);
  line-height: 1.08;
  max-width: 15ch;
}
.hero .lede {
  margin-top: 20px;
  font-size: 17px;
  color: var(--text-muted);
  max-width: 46ch;
}
.hero-actions { margin-top: 32px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.hero-note { margin-top: 14px; font-size: 12.5px; color: var(--text-faint); font-family: var(--font-mono); }

.hero-art {
  aspect-ratio: 1;
  border-radius: 20px;
  border: 1px solid var(--border-bright);
  background: linear-gradient(155deg, var(--bg-raised), var(--bg-panel));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 34px;
  box-shadow: 0 30px 80px -30px #000a;
}
.hero-art img { filter: drop-shadow(0 18px 30px #0009); }

/* ── Buttons ────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14.5px;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.12s ease, background 0.12s ease, border-color 0.12s ease;
}
.btn svg { flex-shrink: 0; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-bright); }
.btn-secondary { background: transparent; border-color: var(--border-bright); color: var(--text); }
.btn-secondary:hover { border-color: var(--accent); color: var(--accent-bright); }
@media (prefers-reduced-motion: no-preference) {
  .btn:active { transform: translateY(1px); }
}

/* ── Feature grid ───────────────────────────────────────────────────── */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.feature {
  background: var(--bg-panel);
  padding: 26px 24px;
}
.feature h3 { font-size: 15px; margin-bottom: 8px; }
.feature p { font-size: 13.5px; color: var(--text-muted); }
.feature .mark {
  font-family: var(--font-mono);
  color: var(--accent-bright);
  font-size: 13px;
  display: block;
  margin-bottom: 12px;
}

/* ── Steps (a real sequence — numbering is load-bearing here) ─────────── */
.steps { display: flex; flex-direction: column; gap: 0; counter-reset: step; }
.step {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 20px;
  padding: 22px 0;
  border-top: 1px solid var(--border);
}
.step:last-child { border-bottom: 1px solid var(--border); }
.step-num {
  font-family: var(--font-mono);
  color: var(--accent-bright);
  font-size: 13px;
  padding-top: 2px;
}
.step h3 { font-size: 15.5px; margin-bottom: 5px; }
.step p { font-size: 14px; color: var(--text-muted); max-width: 56ch; }

/* ── Download cards ─────────────────────────────────────────────────── */
.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
}
.download-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  background: var(--bg-panel);
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.download-card.is-primary { border-color: var(--accent); background: linear-gradient(160deg, var(--accent-dim), var(--bg-panel) 60%); }
.download-card h3 { font-size: 16px; display: flex; align-items: center; gap: 9px; }
.download-card .platform-note { font-size: 13px; color: var(--text-muted); flex: 1; }
.download-card .btn { align-self: flex-start; }
.download-card.is-soon { opacity: 0.6; }

.code-block {
  font-family: var(--font-mono);
  font-size: 12.5px;
  background: #060710;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  overflow-x: auto;
  white-space: pre;
  color: #c9cbe6;
  position: relative;
}
.code-block .copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--bg-raised);
  border: 1px solid var(--border-bright);
  color: var(--text-muted);
  border-radius: 4px;
  padding: 4px 8px;
  cursor: pointer;
}
.code-block .copy-btn:hover { color: var(--text); border-color: var(--accent); }

/* ── Requirements table ─────────────────────────────────────────────── */
.reqs {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.reqs dl { display: grid; grid-template-columns: 200px 1fr; }
.reqs dt, .reqs dd {
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  font-size: 14px;
}
.reqs dl:first-of-type dt, .reqs dl:first-of-type dd { border-top: none; }
.reqs dt {
  font-family: var(--font-mono);
  color: var(--text-faint);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--bg-panel);
}
.reqs dd { color: var(--text); background: var(--bg-panel); }

/* ── Trust panel ────────────────────────────────────────────────────── */
.trust {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  background: var(--bg-panel);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.trust h2 { font-size: 22px; margin-bottom: 12px; }
.trust p { color: var(--text-muted); font-size: 14.5px; }
.trust ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.trust li {
  font-size: 13.5px;
  color: var(--text-muted);
  display: flex;
  gap: 10px;
  align-items: baseline;
}
.trust li::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 1px;
  background: var(--success);
  flex-shrink: 0;
  transform: translateY(-1px);
}

/* ── Footer ─────────────────────────────────────────────────────────── */
footer {
  padding: 40px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  max-width: 1040px;
  margin: 0 auto;
}
footer .fine {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
}
footer .links { display: flex; gap: 20px; }
footer .links a { font-size: 12.5px; color: var(--text-muted); text-decoration: none; }
footer .links a:hover { color: var(--accent-bright); }

/* ── Document pages (terms / privacy) ──────────────────────────────── */
.doc {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 64px 24px 96px;
}
.doc .eyebrow { display: block; margin-bottom: 10px; }
.doc h1 { font-size: 28px; margin-bottom: 6px; }
.doc .updated { color: var(--text-faint); font-size: 13px; font-family: var(--font-mono); margin-bottom: 40px; }
.doc h2 {
  font-size: 16px;
  margin-top: 36px;
  margin-bottom: 10px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.doc h2:first-of-type { padding-top: 0; border-top: none; }
.doc p { color: var(--text-muted); font-size: 14.5px; margin-bottom: 12px; }
.doc ul { color: var(--text-muted); font-size: 14.5px; margin: 0 0 12px 20px; }
.doc li { margin-bottom: 4px; }
.doc strong { color: var(--text); }
.doc code {
  font-family: var(--font-mono);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.9em;
  color: var(--accent-bright);
}
.doc a { color: var(--accent-bright); }
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-muted);
  text-decoration: none;
  margin-bottom: 28px;
}
.back-link:hover { color: var(--accent-bright); }

@media (max-width: 760px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-art { max-width: 220px; margin: 0 auto; order: -1; }
  .trust { grid-template-columns: 1fr; }
  .reqs dl { grid-template-columns: 140px 1fr; }
  .statusbar nav { display: none; }
}