:root {
  --bg: #0d1015;
  --bg-2: #14181f;
  --bg-3: #1a1f28;
  --line: #262c37;
  --text: #dfe3ea;
  --text-dim: #99a2b0;
  --text-faint: #6a7381;
  --accent: #8fb3ff;
  --accent-2: #6a92ff;
  --radius: 10px;
  --shadow: 0 10px 30px rgba(0,0,0,0.35);
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", "Pretendard Variable",
             "Pretendard", "Noto Sans KR", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #fbfbfa;
    --bg-2: #f3f3f1;
    --bg-3: #ebebe7;
    --line: #dcdcd6;
    --text: #1c1e22;
    --text-dim: #4a5361;
    --text-faint: #8a94a4;
    --accent: #3457c9;
    --accent-2: #2544a8;
    --shadow: 0 8px 24px rgba(0,0,0,0.08);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
body { min-height: 100vh; display: flex; flex-direction: column; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- Top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 960px;
  margin: 0 auto;
  padding: 20px 28px;
  width: 100%;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.1px;
}
.brand:hover { text-decoration: none; }
.brand-logo {
  display: block;
  border-radius: 6px;
}
.nav { display: flex; gap: 20px; }
.nav a { color: var(--text-dim); font-size: 14px; }
.nav a:hover { color: var(--text); text-decoration: none; }

/* ---------- Main / Hero ---------- */
main {
  flex: 1;
  max-width: 960px;
  margin: 0 auto;
  padding: 20px 28px 60px;
  width: 100%;
}

.hero {
  padding: 60px 0 40px;
  text-align: left;
}
.hero-logo {
  display: block;
  width: 128px;
  height: 128px;
  border-radius: 24px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}
@media (max-width: 720px) {
  .hero-logo { width: 96px; height: 96px; border-radius: 20px; }
}
.tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--bg-3);
  color: var(--text-dim);
  font-size: 12px;
  letter-spacing: 0.2px;
  border: 1px solid var(--line);
}
.hero h1 {
  font-size: clamp(32px, 5vw, 46px);
  line-height: 1.15;
  margin: 20px 0 16px;
  letter-spacing: -0.5px;
}
.lede {
  color: var(--text-dim);
  font-size: 17px;
  max-width: 560px;
  margin: 0 0 32px;
}

.cta {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.1px;
  cursor: pointer;
  transition: transform 0.08s ease, background 0.14s ease, color 0.14s ease;
  border: 1px solid transparent;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }

.btn.primary {
  background: var(--accent);
  color: #0d1015;
}
.btn.primary:hover { background: var(--accent-2); color: #fff; }

.btn.secondary {
  background: var(--bg-3);
  color: var(--text);
  border-color: var(--line);
}
.btn.secondary:hover {
  background: color-mix(in oklab, var(--bg-3) 70%, var(--accent) 30%);
  border-color: color-mix(in oklab, var(--line) 60%, var(--accent) 40%);
}

.btn.secondary .filesize {
  color: var(--text-faint);
  font-weight: 400;
  font-size: 13px;
}

.release-meta {
  color: var(--text-faint);
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.release-meta .dot { opacity: 0.6; }

/* ---------- Features ---------- */
.features {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 40px 0 60px;
}
.feature {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px 20px;
}
.feature h3 {
  margin: 12px 0 8px;
  font-size: 16px;
  font-weight: 600;
}
.feature p {
  margin: 0;
  color: var(--text-dim);
  font-size: 14px;
}
.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--bg-3);
  color: var(--accent);
}

/* ---------- Download block ---------- */
.download-block {
  border-top: 1px solid var(--line);
  padding-top: 40px;
}
.download-block h2 {
  margin: 0 0 20px;
  font-size: 22px;
  letter-spacing: -0.2px;
}
.steps {
  margin: 0 0 24px;
  padding-left: 22px;
  color: var(--text-dim);
}
.steps li { margin-bottom: 4px; }
.steps code {
  background: var(--bg-3);
  padding: 1px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text);
}

.note {
  margin-top: 24px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 16px;
  color: var(--text-dim);
}
.note summary {
  cursor: pointer;
  color: var(--text);
  font-weight: 500;
  padding: 4px 0;
}
.note p { margin: 8px 0; font-size: 14px; }
.note pre {
  background: var(--bg-3);
  border-radius: 6px;
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  overflow-x: auto;
  color: var(--text);
  margin: 8px 0 4px;
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--line);
  padding: 20px 28px;
  color: var(--text-faint);
  font-size: 13px;
}
.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
}
.footer .dim { opacity: 0.7; }

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  .topbar { padding: 16px 20px; }
  main { padding: 12px 20px 40px; }
  .hero { padding: 32px 0 24px; }
  .features { grid-template-columns: 1fr; }
  .footer { padding: 16px 20px; }
}