* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    text-align: center;
    padding: 80px 20px;
    color: white;
}

header h1 {
    font-size: 4rem;
    margin-bottom: 10px;
}

main {
    flex: 1;
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    text-align: center;
}

footer {
    text-align: center;
    padding: 30px;
    color: rgba(255,255,255,0.8);
    font-size: 0.9rem;
}