body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f4f7f6;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background: linear-gradient(135deg, #4CAF50, #2E8B57);
    color: white;
    padding: 2rem 1rem;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.btn {
    padding: 12px 24px;
    background: #fff;
    color: #4CAF50;
    border: 2px solid #4CAF50;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s;
}

.btn:hover {
    background: #4CAF50;
    color: white;
    transform: translateY(-2px);
}

h1 { margin: 0.5rem 0; }