:root {
    --primary-color: #4F46E5;
    --primary-dark: #4338CA;
    --secondary-color: #10B981;
    --danger-color: #EF4444;
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --background: #F9FAFB;
    --surface: #FFFFFF;
    --border: #E5E7EB;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: var(--text-primary);
}

.auth-container {
    width: 100%;
    max-width: 450px;
}

.auth-card, .terms-card {
    background: var(--surface);
    border-radius: 12px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    overflow: hidden;
}

.terms-card {
    max-width: 800px;
    margin: 20px auto;
}

.auth-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 30px;
    text-align: center;
}

.auth-header h1 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}

.auth-header p {
    font-size: 14px;
    opacity: 0.9;
}

.auth-form {
    padding: 30px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"] {
    width: 100%;
    padding: 10px 14px;
    font-size: 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-group small {
    display: block;
    margin-top: 4px;
    font-size: 12px;
    color: var(--text-secondary);
}

.checkbox-group label {
    display: flex;
    align-items: flex-start;
    cursor: pointer;
    font-weight: 400;
}

.checkbox-group input[type="checkbox"] {
    margin-right: 8px;
    margin-top: 2px;
    cursor: pointer;
}

.checkbox-group a {
    color: var(--primary-color);
    text-decoration: none;
}

.checkbox-group a:hover {
    text-decoration: underline;
}

.btn-primary {
    width: 100%;
    padding: 12px;
    background: var(--primary-color);
    color: white;
    font-size: 15px;
    font-weight: 600;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    margin-top: 10px;
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
}

.btn-primary:active:not(:disabled) {
    transform: scale(0.98);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.auth-links {
    padding: 20px 30px;
    text-align: center;
    font-size: 14px;
    color: var(--text-secondary);
    background: var(--background);
}

.auth-links a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.auth-links a:hover {
    text-decoration: underline;
}

.auth-links span {
    margin: 0 8px;
}

.error-message, .success-message {
    padding: 12px;
    margin: 20px 30px;
    border-radius: 6px;
    font-size: 14px;
}

.error-message {
    background: #FEE2E2;
    color: #991B1B;
    border: 1px solid #FECACA;
}

.success-message {
    background: #D1FAE5;
    color: #065F46;
    border: 1px solid #A7F3D0;
}

/* Terms and Conditions Styles */
.terms-content {
    padding: 30px;
    max-height: 500px;
    overflow-y: auto;
    line-height: 1.6;
}

.terms-content h2 {
    font-size: 18px;
    color: var(--primary-color);
    margin-top: 24px;
    margin-bottom: 12px;
}

.terms-content h2:first-child {
    margin-top: 0;
}

.terms-content p {
    margin-bottom: 12px;
    color: var(--text-primary);
}

.terms-content ul {
    margin-left: 20px;
    margin-bottom: 12px;
}

.terms-content li {
    margin-bottom: 6px;
    color: var(--text-primary);
}

.terms-footer {
    background: #FEF3C7;
    border: 1px solid #FCD34D;
    padding: 16px;
    border-radius: 6px;
    margin-top: 24px;
}

.terms-footer p {
    margin: 0;
    color: #92400E;
}

/* Responsive Design */
@media (max-width: 640px) {
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .auth-header h1 {
        font-size: 20px;
    }
    
    .auth-form {
        padding: 20px;
    }
    
    .auth-links {
        padding: 15px 20px;
    }
    
    .terms-content {
        padding: 20px;
    }
}