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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f6fa;
    color: #333;
}

main.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.alert {
    border-radius: 6px;
    border: none;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
}

.btn {
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.3s ease;
}