:root {
  color-scheme: light dark;
  --bg: #fbfbfa;
  --surface: #ffffff;
  --text: #1d1d1f;
  --muted: #5f5f66;
  --border: #e3e3e6;
  --accent: #0a66d8;
  --accent-text: #ffffff;
  --warn-bg: #fff6e0;
  --warn-border: #e8c46a;
  --code-bg: #f1f1f3;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161618;
    --surface: #1f1f22;
    --text: #ececef;
    --muted: #a3a3ab;
    --border: #34343a;
    --accent: #4c9bff;
    --accent-text: #0b1220;
    --warn-bg: #2b2414;
    --warn-border: #7a6224;
    --code-bg: #2a2a2e;
  }
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

main, footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 16px;
}

a { color: var(--accent); }

code, pre {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.88em;
}

code { background: var(--code-bg); padding: 0.1em 0.35em; border-radius: 4px; }

pre {
  background: var(--code-bg);
  padding: 12px 14px;
  border-radius: 8px;
  overflow-x: auto;
}
pre code { background: none; padding: 0; }

/* ---------- hero */
.hero { padding: 64px 0 32px; }
.app-name { margin: 0 0 8px; color: var(--muted); font-weight: 600; letter-spacing: 0.02em; }
h1 { margin: 0 0 16px; font-size: clamp(2rem, 6vw, 2.9rem); line-height: 1.12; letter-spacing: -0.02em; }
.lede { margin: 0 0 28px; font-size: 1.12rem; color: var(--muted); max-width: 40em; }

.download { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 18px; margin: 0; }
.button {
  display: inline-block;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
  text-decoration: none;
  padding: 12px 22px;
  border-radius: 10px;
  transition: filter 0.15s ease;
}
.button:hover { filter: brightness(1.08); }
.button:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.meta { color: var(--muted); font-size: 0.92rem; }

/* ---------- screenshot */
.shot { margin: 16px 0 40px; }
.shot img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

/* ---------- features */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin: 0 0 48px; }
.features h2 { margin: 0 0 6px; font-size: 1.05rem; }
.features p { margin: 0; color: var(--muted); font-size: 0.95rem; }

/* ---------- first launch + verify */
section > h2 { font-size: 1.35rem; margin: 0 0 12px; }
.first-launch {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin: 0 0 40px;
}
.first-launch ol { padding-left: 1.3em; }
.first-launch li { margin-bottom: 10px; }
.ui { font-style: italic; }
.warn {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 0;
}

.verify { margin: 0 0 48px; }
.hash {
  display: block;
  user-select: all;
  -webkit-user-select: all;
  word-break: break-all;
  padding: 10px 12px;
}

/* ---------- footer */
footer {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  padding-top: 24px;
  padding-bottom: 48px;
  border-top: 1px solid var(--border);
  font-size: 0.92rem;
}

@media (max-width: 640px) {
  .hero { padding-top: 40px; }
  .features { grid-template-columns: 1fr; gap: 18px; }
  .first-launch { padding: 18px 16px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}