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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f8f9fa;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

nav {
    background: white;
    padding: 1rem 0;
    margin-bottom: 2rem;
    border-bottom: 1px solid #e0e0e0;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 2rem;
    align-items: center;
}

nav a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
}

nav a:hover {
    color: #007bff;
}

.card {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

input[type="text"],
input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

button {
    background: #007bff;
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
}

button:hover {
    background: #0056b3;
}

.error {
    color: #dc3545;
    margin-bottom: 1rem;
}

.success {
    color: #28a745;
    margin-bottom: 1rem;
}

.user-info {
    background: #e9ecef;
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

/* Account Management Styles */
.account-form {
    max-width: 500px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-hint {
    font-size: 0.85rem;
    color: #666;
    margin-top: 0.25rem;
}

.danger-zone {
    border-left: 4px solid #dc3545;
    background: #fff5f5;
}

.danger-zone h3 {
    color: #dc3545;
}

/* Button Variants */
.btn-primary {
    background: #007bff;
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary:hover {
    background: #0056b3;
}

.btn-secondary {
    background: #6c757d;
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
}

.btn-secondary:hover {
    background: #545b62;
}

.btn-danger {
    background: #dc3545;
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
}

.btn-danger:hover {
    background: #c82333;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    max-width: 400px;
    width: 90%;
    margin: 0 1rem;
}

.modal-content h3 {
    margin-bottom: 1rem;
    color: #dc3545;
}

.modal-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    justify-content: flex-end;
}

/* Responsive Design */
@media (max-width: 600px) {
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .modal-buttons {
        flex-direction: column;
    }
    
    .modal-buttons button {
        width: 100%;
    }
}