:root {
    --bg: #ffffff;
    --bg-soft: #f6f4fd;
    --text: #1d1730;
    --muted: #5f5876;
    --line: #e4e0f2;
    --accent: #6d4fd6;
    --accent-hover: #5b3fb5;
    --accent-soft: #ece7fc;
    --code-bg: #f1eef9;
    --hero: linear-gradient(180deg, #f3effe 0%, #ffffff 100%);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #14111f;
        --bg-soft: #1b1729;
        --text: #ece9f7;
        --muted: #a49dbd;
        --line: #2d2742;
        --accent: #8b6ae6;
        --accent-hover: #a088ee;
        --accent-soft: #2a2245;
        --code-bg: #221d35;
        --hero: linear-gradient(180deg, #221a3d 0%, #14111f 100%);
    }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

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

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

/* Navigation */
.nav {
    position: sticky;
    top: 0;
    z-index: 10;
    background: color-mix(in srgb, var(--bg) 85%, transparent);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
}
.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--text);
    text-decoration: none;
}
.nav nav { display: flex; gap: 22px; }
.nav nav a { color: var(--muted); text-decoration: none; font-weight: 500; }
.nav nav a:hover { color: var(--text); }

/* Hero */
.hero {
    background: var(--hero);
    text-align: center;
    padding: 80px 0 72px;
}
.hero-icon { filter: drop-shadow(0 12px 28px rgba(91, 63, 181, 0.35)); }
.hero h1 {
    font-size: clamp(2.3rem, 6vw, 3.8rem);
    line-height: 1.1;
    margin: 28px 0 18px;
    letter-spacing: -0.02em;
}
.hero h1 span { color: var(--accent); }
.lead {
    font-size: 1.2rem;
    color: var(--muted);
    max-width: 620px;
    margin: 0 auto 36px;
}

.button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1.05rem;
    text-decoration: none;
    border: 0;
    cursor: pointer;
}
.button.primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 6px 20px rgba(109, 79, 214, 0.35);
}
.button.primary:hover { background: var(--accent-hover); color: #fff; }
.button.disabled { opacity: 0.55; cursor: default; box-shadow: none; }

.meta { color: var(--muted); font-size: 0.92rem; margin: 12px 0 0; }
.note { margin: 14px 0 0; font-size: 0.95rem; }

/* Features */
.features { padding: 80px 0; }
h2 {
    font-size: 2rem;
    margin: 0 0 8px;
    text-align: center;
    letter-spacing: -0.01em;
}
.section-lead { text-align: center; color: var(--muted); margin: 0 auto 44px; max-width: 560px; }
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}
.card {
    background: var(--bg-soft);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 24px;
}
.card-icon {
    width: 44px;
    height: 44px;
    display: grid;
    place-items: center;
    font-size: 1.4rem;
    background: var(--accent-soft);
    border-radius: 12px;
}
.card h3 { margin: 16px 0 6px; font-size: 1.1rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }

/* Download */
.download {
    padding: 80px 0;
    background: var(--bg-soft);
    border-top: 1px solid var(--line);
}
.download .wrap { max-width: 760px; }
.download h2 { margin-bottom: 32px; }
.release {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
    background: var(--bg);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 24px;
}
.release h3 { margin: 0; }
.release .meta { margin-top: 4px; }

.checksum {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 18px 0 8px;
    padding: 12px 16px;
    background: var(--bg);
    border: 1px solid var(--line);
    border-radius: 12px;
    font-size: 0.85rem;
}
.checksum span { font-weight: 600; color: var(--muted); }
.checksum code { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.copy {
    background: var(--accent-soft);
    color: var(--accent);
    border: 0;
    border-radius: 8px;
    padding: 6px 12px;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
}

code, pre { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; }
pre {
    background: var(--code-bg);
    border-radius: 10px;
    padding: 12px 16px;
    overflow-x: auto;
    font-size: 0.9rem;
}
code.small { display: block; font-size: 0.75rem; color: var(--muted); overflow-wrap: anywhere; }
.hint { color: var(--muted); font-size: 0.92rem; margin: 18px 0 6px; }

.older { margin-top: 28px; }
.older summary { cursor: pointer; font-weight: 600; }
.older ul { list-style: none; padding: 0; }
.older li { padding: 10px 0; border-bottom: 1px solid var(--line); }
.older li .meta { margin-left: 10px; }

.source {
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--line);
}
.source h3 { margin-top: 0; }

/* Footer */
.footer {
    border-top: 1px solid var(--line);
    padding: 28px 0;
    color: var(--muted);
    font-size: 0.9rem;
    text-align: center;
}

@media (max-width: 560px) {
    .nav nav { gap: 14px; }
    .hero { padding: 56px 0 48px; }
    .release { flex-direction: column; align-items: stretch; text-align: center; }
    .release .button { justify-content: center; }
    .checksum { flex-wrap: wrap; }
}