:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary: #0f172a;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --bg-white: #ffffff;
    --bg-alt: #f8fafc;
    --border: #e2e8f0;
    --radius-md: 12px;
    --radius-lg: 24px;
    --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', sans-serif; color: var(--text-main); line-height: 1.6; overflow-x: hidden; background: var(--bg-white); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
a { text-decoration: none; transition: 0.3s; }
ul { list-style: none; }

/* Header */
header { padding: 20px 0; position: sticky; top: 0; background: rgba(255,255,255,0.9); backdrop-filter: blur(10px); z-index: 1000; border-bottom: 1px solid var(--border); }
.nav-flex { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 24px; font-weight: 800; color: var(--secondary); }
.logo span { color: var(--primary); }
.nav-links { display: flex; gap: 32px; }
.nav-links a { color: var(--text-main); font-weight: 500; }
.nav-links a:hover { color: var(--primary); }

/* Buttons */
.btn { padding: 12px 24px; border-radius: var(--radius-md); font-weight: 600; cursor: pointer; border: none; display: inline-block; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-outline { border: 1px solid var(--border); background: white; color: var(--secondary); }

/* Hero */
.hero { padding: 120px 0 80px; text-align: center; background: radial-gradient(circle at top right, #eff6ff, transparent); }
.hero h1 { font-size: 64px; font-weight: 900; line-height: 1.1; margin-bottom: 24px; color: var(--secondary); }
.hero p { font-size: 20px; color: var(--text-muted); max-width: 650px; margin: 0 auto 40px; }

/* Features */
.section { padding: 100px 0; }
.section-title { text-align: center; margin-bottom: 60px; }
.section-title h2 { font-size: 40px; margin-bottom: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.card { padding: 40px; background: white; border-radius: var(--radius-lg); border: 1px solid var(--border); transition: 0.3s; }
.card:hover { transform: translateY(-10px); box-shadow: var(--shadow); border-color: var(--primary); }

/* Footer */
footer { padding: 80px 0 40px; background: var(--secondary); color: white; text-align: center; }
.footer-logo { font-size: 28px; font-weight: 800; margin-bottom: 20px; }
.copyright { color: #64748b; font-size: 14px; margin-top: 40px; }

@media (max-width: 768px) {
    .hero h1 { font-size: 40px; }
    .grid-3 { grid-template-columns: 1fr; }
    .nav-links { display: none; }
}