/* Modern Material Design Auth Styles */

/* CSS Variables */
:root {
    --primary: #1976d2;
    --primary-dark: #1565c0;
    --primary-light: #42a5f5;
    --error: #d32f2f;
    --error-light: #ef5350;
    --success: #388e3c;
    --warning: #f57c00;
    --surface: #ffffff;
    --surface-variant: #f5f5f5;
    --on-surface: #1c1b1f;
    --on-surface-variant: #49454f;
    --outline: #79747e;
    --outline-variant: #cac4d0;
    --shadow: rgba(0, 0, 0, 0.12);
    --shadow-hover: rgba(0, 0, 0, 0.16);
    
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --spacing: 8px;
    --spacing-lg: 16px;
    --spacing-xl: 24px;
    --spacing-2xl: 32px;
    
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --elevation-1: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    --elevation-2: 0 3px 6px rgba(0, 0, 0, 0.16), 0 3px 6px rgba(0, 0, 0, 0.23);
    --elevation-3: 0 10px 20px rgba(0, 0, 0, 0.19), 0 6px 6px rgba(0, 0, 0, 0.23);
}

/* Reset and Base */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--on-surface);
    margin: 0;
    padding: 0;
    background: var(--surface-variant);
}

/* Auth Wrapper - Full Height Container */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, #e3f2fd 0%, #f3e5f5 100%);
}

/* Auth Container - Card Container */
.auth-container {
    width: 100%;
    max-width: 400px;
}

/* Auth Card - Main Form Card */
.auth-card {
    background: var(--surface);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--elevation-2);
    padding: var(--spacing-2xl);
    transition: var(--transition);
}

.auth-card:hover {
    box-shadow: var(--elevation-3);
}

/* Header Section */
.auth-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.auth-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing);
    margin-bottom: var(--spacing-lg);
}

.logo-icon {
    font-size: 2rem;
    line-height: 1;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--primary);
    margin: 0;
}

.auth-title {
    font-size: 1.75rem;
    font-weight: 400;
    color: var(--on-surface);
    margin: 0 0 var(--spacing) 0;
}

.auth-subtitle {
    color: var(--on-surface-variant);
    font-size: 0.875rem;
    margin: 0;
}

/* Alert Messages */
.alert {
    display: flex;
    align-items: center;
    gap: var(--spacing);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
    font-size: 0.875rem;
}

.alert--error {
    background: #ffebee;
    color: var(--error);
    border: 1px solid var(--error-light);
}

.alert--success {
    background: #e8f5e8;
    color: var(--success);
    border: 1px solid var(--success);
}

.alert i {
    font-size: 1.125rem;
}

/* Form Styles */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing);
}

/* Material Design Input Fields */
.input-field {
    position: relative;
    background: var(--surface);
    border: 1px solid var(--outline-variant);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.input-field:hover {
    border-color: var(--outline);
}

.input-field:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(25, 118, 210, 0.12);
}

.input-field.error {
    border-color: var(--error);
}

.input-field.error:focus-within {
    border-color: var(--error);
    box-shadow: 0 0 0 2px rgba(211, 47, 47, 0.12);
}

.form-input {
    width: 100%;
    padding: var(--spacing-lg) var(--spacing-lg) var(--spacing) var(--spacing-lg);
    border: none;
    background: transparent;
    font-size: 1rem;
    color: var(--on-surface);
    outline: none;
    transition: var(--transition);
}

.form-input::placeholder {
    color: transparent;
}

.form-label {
    position: absolute;
    left: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
    background: var(--surface);
    padding: 0 4px;
    color: var(--on-surface-variant);
    font-size: 1rem;
    transition: var(--transition);
    pointer-events: none;
}

.form-input:focus + .form-label,
.form-input:not(:placeholder-shown) + .form-label {
    top: 0;
    transform: translateY(-50%);
    font-size: 0.75rem;
    color: var(--primary);
    font-weight: 500;
}

.input-field.error .form-input:focus + .form-label,
.input-field.error .form-input:not(:placeholder-shown) + .form-label {
    color: var(--error);
}

/* Password Fields */
.password-field {
    position: relative;
}

.password-toggle {
    position: absolute;
    right: var(--spacing);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--on-surface-variant);
    cursor: pointer;
    padding: var(--spacing);
    border-radius: 50%;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.password-toggle:hover {
    background: rgba(0, 0, 0, 0.04);
    color: var(--on-surface);
}

/* Form Errors */
.form-error {
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--error);
    font-size: 0.75rem;
    margin-top: 4px;
}

.form-error i {
    font-size: 1rem;
}

/* Form Hints */
.form-hint {
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--on-surface-variant);
    font-size: 0.75rem;
    margin-top: 4px;
}

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

.form-hint i {
    font-size: 1rem;
}

/* Checkbox Fields */
.checkbox-field {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing);
    cursor: pointer;
    font-size: 0.875rem;
    line-height: 1.4;
}

.checkbox-field input[type="checkbox"] {
    display: none;
}

.checkbox-indicator {
    width: 20px;
    height: 20px;
    border: 2px solid var(--outline);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface);
    transition: var(--transition);
    flex-shrink: 0;
    margin-top: 2px;
}

.checkbox-field input[type="checkbox"]:checked + .checkbox-indicator {
    background: var(--primary);
    border-color: var(--primary);
}

.checkbox-indicator i {
    color: white;
    font-size: 14px;
    opacity: 0;
    transition: var(--transition);
}

.checkbox-field input[type="checkbox"]:checked + .checkbox-indicator i {
    opacity: 1;
}

.checkbox-text {
    flex: 1;
}

/* Form Options */
.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing);
    font-size: 0.875rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing);
    padding: var(--spacing-lg) var(--spacing-xl);
    border: none;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn--primary {
    background: var(--primary);
    color: white;
    box-shadow: var(--elevation-1);
}

.btn--primary:hover {
    background: var(--primary-dark);
    box-shadow: var(--elevation-2);
}

.btn--primary:active {
    background: var(--primary-dark);
    transform: translateY(1px);
}

.btn--large {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: 1rem;
    min-height: 48px;
}

.btn i {
    font-size: 1.125rem;
}

/* Form Actions */
.form-actions {
    margin-top: var(--spacing);
}

.form-actions .btn {
    width: 100%;
}

/* Links */
.link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.link:hover {
    color: var(--primary-dark);
    text-decoration: none;
}

/* Auth Footer */
.auth-footer {
    text-align: center;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--outline-variant);
}

.auth-footer p {
    margin: 0 0 var(--spacing) 0;
    font-size: 0.875rem;
    color: var(--on-surface-variant);
}

.auth-benefits {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    color: var(--success);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
}

.auth-benefits i {
    font-size: 1rem;
}

/* Auth Navigation */
.auth-navigation {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--outline-variant);
}

.auth-navigation .nav-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--on-surface-variant);
    text-decoration: none;
    font-size: 0.875rem;
    transition: var(--transition);
    padding: var(--spacing) var(--spacing-lg);
    border-radius: var(--border-radius);
}

.auth-navigation .nav-link:hover {
    color: var(--primary);
    background: rgba(25, 118, 210, 0.08);
}

.auth-navigation .nav-link i {
    font-size: 1rem;
}

/* Logo Link */
.auth-logo .logo-link {
    display: flex;
    align-items: center;
    gap: var(--spacing);
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

.auth-logo .logo-link:hover {
    opacity: 0.8;
}

.auth-logo .logo-link:hover .logo-text {
    color: var(--primary-dark);
}

/* Responsive Design */
@media (max-width: 768px) {
    .auth-wrapper {
        padding: var(--spacing-lg);
    }
    
    .auth-card {
        padding: var(--spacing-xl);
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .form-options {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }
    
    .auth-title {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .auth-wrapper {
        padding: var(--spacing);
    }
    
    .auth-card {
        padding: var(--spacing-lg);
    }
    
    .auth-title {
        font-size: 1.25rem;
    }
    
    .logo-text {
        font-size: 1.25rem;
    }
}

/* Focus States for Accessibility */
.btn:focus-visible,
.link:focus-visible,
.checkbox-field:focus-within .checkbox-indicator {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Loading States */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

/* Animation for smooth interactions */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.auth-card {
    animation: fadeIn 0.3s ease-out;
}

.alert {
    animation: fadeIn 0.2s ease-out;
}