/* Auth Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(5px);
}

.modal-content {
    background: #1a1a1a;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 2rem;
    width: 100%;
    max-width: 400px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.modal-header h2 {
    font-size: 1.5rem;
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    color: #666;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.3s;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

/* Auth Tabs */
.auth-tabs {
    display: flex;
    margin-bottom: 2rem;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    padding: 4px;
}

.auth-tab {
    flex: 1;
    background: none;
    border: none;
    color: #ccc;
    padding: 0.75rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 500;
}

.auth-tab.active {
    background: #8b5cf6;
    color: white;
}

.auth-tab:hover:not(.active) {
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
}

/* Auth Forms */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    color: #ccc;
    font-weight: 500;
    font-size: 0.875rem;
}

.form-group input {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    color: #fff;
    font-size: 1rem;
    transition: all 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #8b5cf6;
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

.form-group input::placeholder {
    color: #666;
}

/* Error Messages */
.error-message {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    color: #ef4444;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.success-message {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    color: #10b981;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

/* Form Validation */
.form-group input.error {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.05);
}

.form-group input.success {
    border-color: #10b981;
    background: rgba(16, 185, 129, 0.05);
}

/* Loading States */
.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn-primary.loading {
    position: relative;
    color: transparent;
}

.btn-primary.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid #fff;
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Mobile Responsiveness */
@media (max-width: 480px) {
    .modal-content {
        margin: 1rem;
        padding: 1.5rem;
        max-width: none;
    }
    
    .modal-header h2 {
        font-size: 1.25rem;
    }
    
    .auth-tabs {
        margin-bottom: 1.5rem;
    }
    
    .auth-tab {
        padding: 0.625rem 0.75rem;
        font-size: 0.875rem;
    }
}