:root {
    --bg: #0a0a0a;
    --surface: #141414;
    --surface2: #1e1e1e;
    --surface3: #252525;
    --border: #2a2a2a;
    --border-light: #333;
    --text: #e5e5e5;
    --text2: #888;
    --text3: #555;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-dim: rgba(59, 130, 246, 0.12);
    --green: #22c55e;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    background: var(--bg); color: var(--text);
    min-height: 100vh; display: flex; flex-direction: column;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.nav {
    display: flex; align-items: center; justify-content: space-between;
    padding: 18px 40px; border-bottom: 1px solid var(--border);
    background: rgba(10, 10, 10, 0.9); backdrop-filter: blur(8px);
    position: sticky; top: 0; z-index: 100;
}
.nav-logo { font-size: 20px; font-weight: 700; letter-spacing: -0.5px; text-decoration: none; color: var(--text); }
.nav-logo span { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-link {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 7px 14px; border-radius: 7px; border: 1px solid var(--border);
    background: var(--surface); color: var(--text2); text-decoration: none;
    font-size: 13px; font-weight: 500; transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.nav-link:hover { color: var(--text); border-color: var(--border-light); background: var(--surface2); text-decoration: none; }
.nav-link.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.nav-link.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }

.page-header {
    padding: 72px 24px 48px;
    text-align: center;
    border-bottom: 1px solid var(--border);
    position: relative; overflow: hidden;
}
.page-header::before {
    content: ''; position: absolute; top: 0; left: 50%; transform: translateX(-50%);
    width: 500px; height: 200px;
    background: radial-gradient(ellipse at center, rgba(59, 130, 246, 0.07) 0%, transparent 70%);
    pointer-events: none;
}
.page-label {
    font-size: 11px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase;
    color: var(--accent); margin-bottom: 16px;
}
.page-title {
    font-size: clamp(32px, 5vw, 52px); font-weight: 800; letter-spacing: -1.5px;
    color: var(--text); margin-bottom: 16px; line-height: 1.1;
}
.page-subtitle {
    font-size: 16px; color: var(--text2); max-width: 480px; margin: 0 auto;
    line-height: 1.6;
}

.content {
    flex: 1; max-width: 800px; margin: 0 auto; padding: 64px 24px 80px; width: 100%;
}

.channels-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px;
    margin-bottom: 72px;
}
.channel-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
    padding: 26px 22px; text-align: center; text-decoration: none; color: var(--text);
    transition: border-color 0.15s, background 0.15s, transform 0.1s; display: block;
}
.channel-card:hover { border-color: var(--border-light); background: var(--surface2); transform: translateY(-2px); text-decoration: none; }
.channel-card.featured { border-color: var(--accent); }
.channel-icon { font-size: 28px; display: block; margin-bottom: 12px; }
.channel-title { font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.channel-desc { font-size: 12px; color: var(--text2); line-height: 1.5; }
.channel-tag {
    display: inline-block; margin-top: 10px; padding: 3px 10px; border-radius: 4px;
    font-size: 10px; font-weight: 700; letter-spacing: 0.5px; text-transform: uppercase;
    background: var(--accent-dim); color: var(--accent);
}

.section-label { font-size: 11px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; color: var(--accent); margin-bottom: 14px; }
.section-title { font-size: clamp(22px, 3.5vw, 30px); font-weight: 700; letter-spacing: -0.5px; margin-bottom: 32px; }

.faq { margin-bottom: 72px; }
.faq-item {
    border: 1px solid var(--border); border-radius: 10px; overflow: hidden;
    margin-bottom: 8px; background: var(--surface);
}
.faq-question {
    display: flex; align-items: center; justify-content: space-between; gap: 16px;
    padding: 20px 24px; cursor: pointer; user-select: none;
    font-size: 15px; font-weight: 600; color: var(--text); line-height: 1.4;
    list-style: none; transition: background 0.15s;
}
.faq-question:hover { background: var(--surface2); }
.faq-question::-webkit-details-marker { display: none; }
.faq-chevron {
    font-size: 11px; color: var(--text3); flex-shrink: 0;
    transition: transform 0.2s; display: inline-block;
}
details[open] .faq-chevron { transform: rotate(90deg); }
.faq-answer {
    padding: 0 24px 20px; font-size: 14px; color: var(--text2); line-height: 1.8;
    border-top: 1px solid var(--border);
}
.faq-answer p { padding-top: 16px; margin-bottom: 10px; }
.faq-answer p:last-child { margin-bottom: 0; }
.faq-answer code {
    font-family: 'SF Mono', 'Fira Code', Consolas, monospace;
    font-size: 12px; background: var(--surface3);
    padding: 2px 6px; border-radius: 4px; color: var(--accent);
}
.faq-answer a { color: var(--accent); }

.contact-section { margin-bottom: 72px; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.contact-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
    padding: 26px 24px; display: flex; flex-direction: column; gap: 8px;
}
.contact-card-title { font-size: 14px; font-weight: 700; color: var(--text); }
.contact-card-desc { font-size: 13px; color: var(--text2); line-height: 1.6; flex: 1; }
.contact-card a {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: 13px; font-weight: 600; color: var(--accent);
    margin-top: 4px; text-decoration: none;
}
.contact-card a:hover { text-decoration: underline; }

footer {
    padding: 32px 40px; border-top: 1px solid var(--border);
    display: flex; align-items: center; justify-content: space-between;
    gap: 16px; flex-wrap: wrap;
}
.footer-logo { font-size: 16px; font-weight: 700; letter-spacing: -0.5px; text-decoration: none; color: var(--text2); }
.footer-logo span { color: var(--accent); }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-links a { font-size: 13px; color: var(--text3); text-decoration: none; transition: color 0.15s; }
.footer-links a:hover { color: var(--text2); }
.footer-copy { font-size: 12px; color: var(--text3); }

@media (max-width: 640px) {
    .nav { padding: 14px 20px; }
    .nav-links { gap: 6px; }
    .nav-link { padding: 6px 10px; font-size: 12px; }
    .page-header { padding: 48px 20px 36px; }
    .content { padding: 40px 20px 60px; }
    .channels-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .faq-question { padding: 16px 18px; font-size: 14px; }
    .faq-answer { padding: 0 18px 16px; }
    footer { flex-direction: column; align-items: flex-start; padding: 24px 20px; }
}
@media (min-width: 641px) and (max-width: 800px) {
    .channels-grid { grid-template-columns: 1fr 1fr; }
}