:root {
    --bg: #0f1220;
    --surface: #171a2c;
    --text: #e6e9f5;
    --muted: #a8acc4;
    --primary: #6c8cff;
    --primary-strong: #4f6aff;
    --accent: #12d6c8;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    --radius: 14px;
}

/* Global reset */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
    background: radial-gradient(1200px 600px at 10% -10%, #1b2040 0%, var(--bg) 50%), var(--bg);
    color: var(--text);
    line-height: 1.6;
}

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

.container {
    width: min(1100px, 92%);
    margin: 0 auto;
}

/* Header */
header {
    position: sticky;
    top: 0;
    background: rgba(23, 26, 44, 0.75);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    z-index: 10;
}
.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 0;
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-weight: 800;
    letter-spacing: 0.2px;
}
.brand-logo {
    width: 36px; height: 36px; border-radius: 9px;
    background: conic-gradient(from 180deg at 50% 50%, var(--primary), var(--accent), var(--primary));
    box-shadow: var(--shadow);
}
nav ul { list-style: none; display: flex; gap: 22px; margin: 0; padding: 0; }
nav a { color: var(--text); font-weight: 600; opacity: 0.9; }
nav a:hover { opacity: 1; }

/* Hero */
.hero {
    padding: 90px 0 60px;
}
.hero-card {
    border-radius: var(--radius);
    background:
        linear-gradient(180deg, rgba(108, 140, 255, 0.16) 0%, rgba(18, 214, 200, 0.10) 100%),
        var(--surface);
    box-shadow: var(--shadow);
    padding: 48px;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 34px;
}
.hero h1 {
    margin: 0 0 14px;
    font-size: clamp(30px, 5vw, 48px);
    line-height: 1.12;
}
.hero p { color: var(--muted); margin: 0 0 26px; font-size: 18px; }
.cta { display: flex; flex-wrap: wrap; gap: 14px; }
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    gap: 10px;
    padding: 12px 18px;
    border-radius: 12px;
    font-weight: 700;
    border: 1px solid rgba(255,255,255,0.14);
    transition: transform 0.06s ease, box-shadow 0.2s ease, background 0.2s ease;
    will-change: transform;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(0,0,0,0.25); text-decoration: none; }
.btn-primary { background: var(--primary); color: #0b1024; border-color: transparent; }
.btn-primary:hover { background: var(--primary-strong); }
.btn-ghost { background: transparent; color: var(--text); }
.badge { display: inline-block; padding: 6px 10px; border-radius: 999px; background: rgba(108,140,255,0.18); color: var(--text); font-weight: 700; font-size: 12px; }

/* Video preview */
.video-preview {
    border-radius: 12px;
    overflow: hidden;
    background: #0b1024;
    border: 1px solid rgba(255,255,255,0.08);
    box-shadow: var(--shadow);
    aspect-ratio: 16 / 9;
}
.video-preview iframe { width: 100%; height: 100%; border: 0; }

/* Sections */
section { padding: 34px 0; }
.section-card {
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
    padding: 28px;
}
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.video-card {
    border-radius: 12px;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(108,140,255,0.18), rgba(18,214,200,0.14));
    border: 1px solid rgba(255,255,255,0.08);
    min-height: 160px;
    display: flex; align-items: end; padding: 14px;
}
.video-card h3 { margin: 0; font-size: 16px; }
.section-title { margin: 0 0 12px; font-size: 22px; }
.section-sub { margin: 0 0 18px; color: var(--muted); }

/* Footer */
footer { padding: 30px 0 50px; color: var(--muted); text-align: center; }

/* Responsive */
@media (max-width: 900px) {
    .hero-card { grid-template-columns: 1fr; padding: 32px; }
    .grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
    nav ul { gap: 14px; }
    .grid { grid-template-columns: 1fr; }
}