:root {
    --bg: #313338;
    --bg-2: #2b2d31;
    --bg-3: #1e1f22;
    --text: #f2f3f5;
    --muted: #b5bac1;
    --dim: #949ba4;
    --accent: #5865f2;
    --accent-h: #4752c4;
    --ok: #23a559;
    --border: rgba(255,255,255,.08);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    min-height: 100vh;
    font-family: "Segoe UI", Arial, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 12% -10%, rgba(88,101,242,.28), transparent 36%),
        radial-gradient(circle at 90% 110%, rgba(35,165,89,.12), transparent 32%),
        var(--bg);
}

a { color: inherit; }

.wrap {
    width: min(1080px, calc(100% - 40px));
    margin: 0 auto;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 22px 0 8px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    font-weight: 700;
    letter-spacing: .02em;
}

.logo {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    object-fit: cover;
    display: block;
    background: var(--accent);
}

.logo-lg {
    width: 72px;
    height: 72px;
    border-radius: 18px;
    margin: 0 auto;
}

.nav-links {
    display: flex;
    gap: 18px;
    color: var(--muted);
    font-size: 14px;
}

.nav-links a { text-decoration: none; }
.nav-links a:hover { color: var(--text); }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    padding: 0 18px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
    border: 0;
    cursor: pointer;
}

.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-h); }
.btn-ghost {
    background: #4e5058;
    color: var(--text);
}
.btn-ghost:hover { background: #6d6f78; }

.hero {
    display: grid;
    grid-template-columns: 1.15fr .85fr;
    gap: 48px;
    align-items: center;
    padding: 56px 0 40px;
}

.hero h1 {
    margin: 0 0 16px;
    font-size: clamp(36px, 6vw, 64px);
    line-height: .95;
    letter-spacing: -.04em;
}

.hero p {
    margin: 0 0 28px;
    max-width: 540px;
    color: var(--muted);
    font-size: 18px;
    line-height: 1.55;
}

.cta { display: flex; flex-wrap: wrap; gap: 12px; }

.preview {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 24px 80px rgba(0,0,0,.35);
}

.preview-bar {
    display: flex;
    gap: 6px;
    padding: 12px 14px;
    background: var(--bg-3);
}
.dot { width: 10px; height: 10px; border-radius: 50%; background: #4e5058; }
.preview-body { display: flex; min-height: 280px; }
.rail {
    width: 72px;
    background: var(--bg-3);
    padding: 14px 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.pill {
    width: 48px;
    height: 48px;
    border-radius: 16px;
    background: var(--accent);
    display: grid;
    place-items: center;
    font-weight: 800;
}
.pill.dim { background: #35373c; color: var(--dim); border-radius: 50%; }
.list { flex: 1; padding: 18px 20px; }
.row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 8px;
    color: var(--muted);
}
.row.active { background: #404249; color: var(--text); }
.av {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: var(--accent);
}

.section { padding: 18px 0 64px; }
.section h2 {
    margin: 0 0 10px;
    font-size: 32px;
    letter-spacing: -.03em;
}
.lead { color: var(--muted); margin: 0 0 28px; max-width: 640px; }

.grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}
.card {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 22px;
}
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); line-height: 1.5; }
.tag {
    display: inline-block;
    margin-bottom: 12px;
    padding: 4px 8px;
    border-radius: 999px;
    background: rgba(88,101,242,.16);
    color: #c9cdff;
    font-size: 12px;
    font-weight: 700;
}

.footer {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding: 28px 0 40px;
    color: var(--dim);
    border-top: 1px solid var(--border);
    font-size: 13px;
}
.footer a { color: var(--muted); text-decoration: none; }
.footer a:hover { color: var(--text); }

.center {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}
.panel {
    width: min(520px, 100%);
    background: rgba(43,45,49,.88);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 40px 32px;
    text-align: center;
    box-shadow: 0 24px 80px rgba(0,0,0,.35);
}
.panel h1 { margin: 18px 0 10px; font-size: 30px; }
.panel p { margin: 0 0 24px; color: var(--muted); line-height: 1.55; }
.note { font-size: 13px; color: var(--dim); margin-top: 16px; }

@media (max-width: 860px) {
    .hero, .grid, .preview-body, .footer { display: block; }
    .rail { display: none; }
    .nav-links { display: none; }
    .card { margin-bottom: 12px; }
}