:root {
  --bg: #0b0f14;
  --panel: #131a22;
  --line: #26323f;
  --text: #e6edf3;
  --muted: #8b9aa7;
  --accent: #4ea1ff;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif; }
main { max-width: 900px; margin: 0 auto; padding: 48px 20px 80px; }

header { text-align: center; margin-bottom: 36px; }
.logo { font-size: 44px; font-weight: 800; letter-spacing: -0.02em; }
.logo span { color: var(--accent); }
.tag { color: var(--muted); font-size: 17px; max-width: 620px; margin: 12px auto 0; line-height: 1.5; }

.cta { text-align: center; margin: 28px 0 44px; }
.download {
  display: inline-block;
  background: var(--accent);
  color: #001022;
  font-weight: 700;
  font-size: 18px;
  padding: 14px 28px;
  border-radius: 10px;
  text-decoration: none;
}
.download:hover { filter: brightness(1.08); }
.hint { color: var(--muted); font-size: 14px; margin-top: 14px; }
code { background: var(--panel); padding: 2px 6px; border-radius: 5px; font-family: ui-monospace, Consolas, monospace; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; }
.card h3 { margin: 0 0 8px; font-size: 16px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.55; }
.card em { color: var(--text); font-style: normal; font-weight: 600; }

.note { margin-top: 36px; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 18px 22px; }
.note h3 { margin: 0 0 10px; font-size: 16px; }
.note ul { margin: 0; padding-left: 20px; color: var(--muted); font-size: 14px; line-height: 1.6; }

footer { margin-top: 48px; display: flex; justify-content: center; gap: 16px; color: var(--muted); font-size: 13px; }
footer a { color: var(--muted); }