:root {
    --primary: #0f2027;
    --secondary: #203a43;
    --accent: #2c7a7b;
    --text: #333;
    --bg: #f8f9fc;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    margin: 0; padding: 0;
    color: var(--text); background: var(--bg);
    display: flex; flex-direction: column; min-height: 100vh;
}

header {
    background: white; padding: 1rem 5%;
    display: flex; justify-content: space-between; align-items: center;
    border-bottom: 1px solid #e2e8f0;
}

.logo { font-size: 1.5rem; font-weight: 800; color: var(--primary); text-decoration: none; letter-spacing: -0.5px;}
.logo span { color: var(--accent); }

nav a {
    margin-left: 1.5rem; text-decoration: none; color: #4a5568;
    font-weight: 500; font-size: 0.95rem; transition: color 0.2s;
}
nav a:hover, nav a.active { color: var(--accent); }

.page-header {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white; padding: 4rem 5%; text-align: center;
}
.page-header h1 { margin: 0 0 1rem 0; font-size: 2.5rem; }
.page-header p { margin: 0; font-size: 1.1rem; opacity: 0.9; max-width: 600px; margin: 0 auto; }

main { padding: 4rem 5%; flex: 1; max-width: 1200px; margin: 0 auto; width: 90%; box-sizing: border-box; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }

.card {
    background: white; padding: 2.5rem; border-radius: 8px;
    border: 1px solid #e2e8f0; transition: transform 0.2s, box-shadow 0.2s;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 10px 25px rgba(0,0,0,0.05); }
.card h3 { color: var(--primary); margin-top: 0; font-size: 1.25rem; }

footer {
    background: var(--primary); color: white; text-align: center;
    padding: 2rem; font-size: 0.85rem; margin-top: auto;
}
footer p { opacity: 0.7; margin: 0; }