.auth-container {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    overflow: hidden;
}

.auth-card {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-xl);
    background: var(--bg-primary);
    position: relative;
    overflow-y: auto;
}

.auth-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 20%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 80%, rgba(0, 153, 204, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.auth-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
    z-index: 1;
}

.brand-logo h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.auth-title {
    font-size: var(--font-size-3xl);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.auth-subtitle {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
}

.auth-form {
    width: 100%;
    max-width: 450px;
    position: relative;
    z-index: 1;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.password-input-container {
    position: relative;
}

.password-input {
    padding-right: 50px;
}

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

.password-toggle:hover {
    color: var(--accent-primary);
    background: var(--bg-hover);
}

.eye-icon {
    width: 20px;
    height: 20px;
}

.password-strength {
    margin-top: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.strength-bar {
    flex: 1;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    overflow: hidden;
}

.strength-fill {
    height: 100%;
    width: 0%;
    background: var(--color-danger);
    transition: var(--transition);
    border-radius: 2px;
}

.strength-fill.weak {
    width: 25%;
    background: var(--color-danger);
}

.strength-fill.medium {
    width: 50%;
    background: var(--color-warning);
}

.strength-fill.good {
    width: 75%;
    background: var(--accent-primary);
}

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

.strength-text {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    min-width: 80px;
}

.terms-checkbox,
.newsletter-checkbox {
    display: flex;
    align-items: flex-start;
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.5;
    gap: var(--spacing-xs);
}

.terms-checkbox input,
.newsletter-checkbox input {
    display: none;
}

.checkmark {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    position: relative;
    transition: var(--transition);
    flex-shrink: 0;
    margin-top: 2px;
}

.checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
    opacity: 0;
    transition: var(--transition);
}

.terms-checkbox input:checked + .checkmark,
.newsletter-checkbox input:checked + .checkmark {
    background: var(--accent-gradient);
    border-color: var(--accent-primary);
}

.terms-checkbox input:checked + .checkmark::after,
.newsletter-checkbox input:checked + .checkmark::after {
    opacity: 1;
}

.terms-link {
    color: var(--accent-primary);
    text-decoration: none;
    transition: var(--transition);
}

.terms-link:hover {
    color: var(--accent-secondary);
    text-decoration: underline;
}

.signup-btn {
    width: 100%;
    margin-bottom: var(--spacing-lg);
    margin-top: var(--spacing-md);
    position: relative;
    overflow: hidden;
}

.signup-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.signup-btn:disabled:hover {
    transform: none;
    box-shadow: none;
}

.btn-text {
    transition: var(--transition);
}

.signup-btn.loading .btn-text {
    opacity: 0;
}

.signup-btn.loading .loading-spinner {
    display: inline-block !important;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.form-message {
    text-align: center;
    margin-top: var(--spacing-md);
    font-size: var(--font-size-sm);
    min-height: 20px;
}

.form-message.success {
    color: var(--color-success);
}

.form-message.error {
    color: var(--color-danger);
}

.auth-footer {
    text-align: center;
    margin-top: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.auth-footer p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.auth-link {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.auth-link:hover {
    color: var(--accent-secondary);
    text-decoration: underline;
}

/* Visual Side */
.auth-visual {
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: var(--spacing-xl);
}

.auth-visual::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(0, 153, 204, 0.15) 0%, transparent 50%);
}

.visual-content {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 400px;
}

.features-preview {
    margin-bottom: var(--spacing-2xl);
}

.feature-item {
    display: flex;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.feature-item:hover {
    transform: translateY(-2px);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 2rem;
    margin-right: var(--spacing-md);
    flex-shrink: 0;
}

.feature-text h3 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.feature-text p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.4;
}

.success-metrics {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    position: relative;
    overflow: hidden;
}

.success-metrics::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--accent-gradient);
}

.metric {
    text-align: center;
    padding: var(--spacing-sm) 0;
}

.metric-number {
    display: block;
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--accent-primary);
    line-height: 1;
}

.metric-label {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

.counter {
    transition: var(--transition);
}

/* Responsive Design */
@media (max-width: 768px) {
    .auth-container {
        grid-template-columns: 1fr;
    }
    
    .auth-visual {
        display: none;
    }
    
    .auth-card {
        padding: var(--spacing-lg);
    }
    
    .auth-title {
        font-size: var(--font-size-2xl);
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
}

@media (max-width: 480px) {
    .auth-card {
        padding: var(--spacing-md);
    }
    
    .auth-header {
        margin-bottom: var(--spacing-lg);
    }
    
    .brand-logo h1 {
        font-size: var(--font-size-xl);
    }
    
    .auth-title {
        font-size: var(--font-size-xl);
    }
    
    .auth-subtitle {
        font-size: var(--font-size-base);
    }
    
    .auth-form {
        max-width: 100%;
    }
}