:root {
    --primary: #2563eb;
    --dark: #1e293b;
    --light: #f8fafc;
    --text: #334155;
}

body {
    font-family: 'Inter', -apple-system, sans-serif;
    margin: 0;
    color: var(--text);
    background-color: var(--light);
    line-height: 1.6;
}

header {
    background: white;
    border-bottom: 1px solid #e2e8f0;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    sticky: top;
}

.logo {
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--primary);
    text-decoration: none;
    letter-spacing: -1px;
}

nav a {
    margin-left: 2rem;
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: color 0.2s;
}

nav a:hover { color: var(--primary); }

.hero {
    padding: 80px 20px;
    text-align: center;
    background: linear-gradient(135deg, #ffffff 0%, #eff6ff 100%);
}

.container { max-width: 1000px; margin: 0 auto; padding: 0 20px; }

h1 { font-size: 3rem; color: var(--dark); margin-bottom: 1rem; letter-spacing: -0.02em; }

.btn {
    background: var(--primary);
    color: white;
    padding: 12px 24px;
    border-radius: 6px;
    text-decoration: none;
    display: inline-block;
    font-weight: 600;
    margin-top: 20px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 40px;
}

.card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
}