/* ==========================================================================
   Auth Modal Styles
   ========================================================================== */

/* Modal Overlay */
.auth-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: none;
    animation: fadeIn 0.3s ease;
}

.auth-modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

/* Modal Content */
.auth-modal-content {
    position: relative;
    width: 90%;
    max-width: 480px;
    max-height: 90vh;
    background: white;
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow-y: auto;
    animation: slideUp 0.3s ease;
    z-index: 10001;
}

.auth-modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 36px;
    height: 36px;
    border: none;
    background: var(--bg-light);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 10;
}

.auth-modal-close:hover {
    background: var(--bg-gray);
    transform: rotate(90deg);
}

/* Auth Tabs */
.auth-tabs {
    display: flex;
    border-bottom: 2px solid var(--bg-gray);
    padding: 24px 24px 0;
}

.auth-tab {
    flex: 1;
    padding: 16px;
    border: none;
    background: transparent;
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    position: relative;
    transition: var(--transition);
}

.auth-tab.active {
    color: var(--primary);
}

.auth-tab.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--primary);
    border-radius: 3px 3px 0 0;
}

/* Auth Forms */
.auth-form {
    display: none;
    padding: 32px 24px 24px;
    animation: fadeIn 0.3s ease;
}

.auth-form.active {
    display: block;
}

.auth-header {
    text-align: center;
    margin-bottom: 32px;
}

.auth-header h2 {
    font-size: 1.75rem;
    margin-bottom: 8px;
}

.auth-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.back-btn {
    position: absolute;
    left: 0;
    top: -4px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: var(--transition);
}

.back-btn:hover {
    background: var(--bg-light);
    color: var(--primary);
}

/* Form Groups */
.form-group {
    margin-bottom: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group label {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--bg-gray);
    border-radius: 12px;
    font-size: 1rem;
    font-family: var(--font-body);
    transition: var(--transition);
    background: white;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(0, 102, 204, 0.1);
}

.form-group input::placeholder {
    color: var(--text-light);
}

/* Password Input */
.password-input-wrapper {
    position: relative;
}

.password-toggle {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: 8px;
    transition: var(--transition);
}

.password-toggle:hover {
    color: var(--text-secondary);
}

/* Password Strength Indicator */
.password-strength {
    margin-top: 8px;
    height: 4px;
    background: var(--bg-gray);
    border-radius: 2px;
    overflow: hidden;
    display: none;
}

.password-strength.active {
    display: block;
}

.password-strength::after {
    content: '';
    display: block;
    height: 100%;
    width: 0%;
    background: var(--danger);
    transition: all 0.3s ease;
}

.password-strength.weak::after {
    width: 33%;
    background: var(--danger);
}

.password-strength.medium::after {
    width: 66%;
    background: var(--warning);
}

.password-strength.strong::after {
    width: 100%;
    background: var(--success);
}

/* Form Options */
.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    font-size: 0.9rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.forgot-password {
    color: var(--primary);
    font-weight: 600;
}

.forgot-password:hover {
    text-decoration: underline;
}

/* Button Loader */
.btn-loader {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.spinner {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Auth Divider */
.auth-divider {
    position: relative;
    text-align: center;
    margin: 24px 0;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: calc(50% - 60px);
    height: 1px;
    background: var(--bg-gray);
}

.auth-divider::before { left: 0; }
.auth-divider::after { right: 0; }

.auth-divider span {
    background: white;
    padding: 0 12px;
    color: var(--text-secondary);
    font-size: 0.875rem;
    position: relative;
}

/* Social Login */
.social-login {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 24px;
}

.social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 16px;
    border: 2px solid var(--bg-gray);
    border-radius: 12px;
    background: white;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.social-btn:hover {
    border-color: var(--text-light);
    box-shadow: var(--shadow-sm);
}

/* Form Messages */
.form-message {
    margin-top: 16px;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
    display: none;
}

.form-message.active {
    display: block;
}

.form-message.success {
    background: #D4EDDA;
    color: var(--success);
    border: 1px solid var(--success);
}

.form-message.error {
    background: #F8D7DA;
    color: var(--danger);
    border: 1px solid var(--danger);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(40px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Responsive */
@media (max-width: 768px) {
    .auth-modal-content {
        width: 95%;
        max-width: none;
        border-radius: 20px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .social-login {
        grid-template-columns: 1fr;
    }
    
    .auth-tabs {
        padding: 16px 16px 0;
    }
    
    .auth-form {
        padding: 24px 16px 16px;
    }
}

/* Prevent body scroll when modal is open */
body.modal-open {
    overflow: hidden;
}