:root {
    --primary: #0f172a;
    --primary-light: #1e293b;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --secondary: #14b8a6;
    --bg: #f8fafc;
    --text: #0f172a;
    --text-secondary: #475569;
    --border: #e2e8f0;
    --radius: 0.75rem;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', sans-serif; color: var(--text); background: var(--bg); line-height: 1.6; }
.shell { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

header { background: #fff; border-bottom: 1px solid var(--border); padding: 1rem 0; position: sticky; top: 0; z-index: 100; }
.header-inner { display: flex; justify-content: space-between; align-items: center; }
.logo { font-weight: 800; font-size: 1.25rem; display: flex; align-items: center; gap: 0.5rem; text-decoration: none; color: var(--primary); }
.logo span { color: var(--accent); }

.hero { padding: 6rem 0; text-align: center; background: radial-gradient(circle at top right, #f1f5f9, #f8fafc); }
.hero h1 { font-size: clamp(2.5rem, 6vw, 4rem); margin-bottom: 1.5rem; line-height: 1.1; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p { font-size: 1.25rem; max-width: 700px; margin: 0 auto 2.5rem; color: var(--text-secondary); }

.btn { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.875rem 1.75rem; border-radius: var(--radius); font-weight: 600; text-decoration: none; transition: all 0.2s; cursor: pointer; border: none; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-outline { border: 1px solid var(--border); background: #fff; color: var(--text); }
.btn-outline:hover { background: var(--bg); }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; margin: 4rem 0; }
.card { background: #fff; padding: 2rem; border-radius: var(--radius); border: 1px solid var(--border); transition: all 0.2s; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card i { font-size: 2rem; color: var(--accent); margin-bottom: 1.5rem; display: block; }
.card h3 { margin-bottom: 1rem; }

.section { padding: 5rem 0; }
.section-alt { background: #f1f5f9; }
.section-title { text-align: center; margin-bottom: 3rem; }

footer { background: var(--primary); color: #fff; padding: 4rem 0; margin-top: 5rem; }
footer a { color: #cbd5e1; text-decoration: none; }
footer a:hover { color: #fff; }

@media (max-width: 768px) {
    .hero { padding: 4rem 0; }
    .grid { grid-template-columns: 1fr; }
}