* { margin: 0; padding: 0; box-sizing: border-box; }
    body { 
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; 
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        min-height: 100vh;
        font-size: 17px;
    }