/**
 * Login/Register Form Design Variants
 * All visual designs as equal variants
 */

// Design Variables (shared across variants)
$fus-primary-color: #2563eb !default;
$fus-primary-hover: #1d4ed8 !default;
$fus-error-color: #dc2626 !default;
$fus-error-bg: #fef2f2 !default;
$fus-error-border: #fecaca !default;
$fus-error-text: #991b1b !default;
$fus-success-color: #059669 !default;
$fus-success-bg: #f0fdf4 !default;
$fus-success-border: #bbf7d0 !default;
$fus-border-color: #e5e7eb !default;
$fus-text-primary: #111827 !default;
$fus-text-secondary: #6b7280 !default;
$fus-text-muted: #9ca3af !default;

// Design 1: Modern Minimal (FREE)
.fus-design-modern-minimal {
    .fus-login-form-wrap,
    .fus-register-form-wrap {
        max-width: 420px;
        margin: 0 auto;
        padding: 32px 24px;
        background: #ffffff;
        border-radius: 12px;
        box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
        border: 1px solid #f3f4f6;
        
        &.fus-register-form-wrap {
            max-width: 480px;
        }
    }
    
    .fus-form-group {
        margin-bottom: 24px;
        
        &.fus-checkbox-group {
            margin-bottom: 20px;
            
            label {
                font-weight: 400;
                cursor: pointer;
                display: flex;
                align-items: center;
                color: $fus-text-secondary;
                font-size: 14px;
                
                input[type="checkbox"] {
                    width: 16px;
                    height: 16px;
                    margin-right: 8px;
                    margin-bottom: 0;
                    accent-color: $fus-primary-color;
                }
            }
        }
        
        label {
            display: block;
            margin-bottom: 6px;
            font-weight: 500;
            color: $fus-text-primary;
            font-size: 14px;
            line-height: 1.4;
            
            .required {
                color: $fus-error-color;
                margin-left: 2px;
                font-weight: 400;
            }
        }
    }
    
    .fus-form-control {
        padding: 12px 16px;
        border: 1px solid $fus-border-color;
        border-radius: 8px;
        font-size: 15px;
        color: $fus-text-primary;
        background-color: #ffffff;
        transition: all 0.15s ease;
        
        &:focus {
            outline: none;
            border-color: $fus-primary-color;
            box-shadow: 0 0 0 3px rgba($fus-primary-color, 0.1);
        }
        
        &:disabled {
            background-color: #f9fafb;
            color: $fus-text-muted;
        }
        
        &.error {
            border-color: $fus-error-color;
            &:focus { box-shadow: 0 0 0 3px rgba($fus-error-color, 0.1); }
        }
        
        &.success {
            border-color: $fus-success-color;
            &:focus { box-shadow: 0 0 0 3px rgba($fus-success-color, 0.1); }
        }
        
        &::placeholder {
            color: $fus-text-muted;
            opacity: 1;
        }
        
        &:hover:not(:focus):not(:disabled) {
            border-color: darken($fus-border-color, 10%);
        }
    }
    
    .field-error {
        color: $fus-error-color;
        font-weight: 400;
    }
    
    .fus-submit-btn {
        padding: 14px 20px;
        background-color: $fus-primary-color;
        color: white;
        border-radius: 8px;
        font-size: 15px;
        font-weight: 600;
        transition: all 0.15s ease;
        position: relative;
        overflow: hidden;
        
        &:hover:not(:disabled) {
            background-color: $fus-primary-hover;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba($fus-primary-color, 0.15);
        }
        
        &:active:not(:disabled) {
            transform: translateY(0);
            box-shadow: 0 2px 4px rgba($fus-primary-color, 0.15);
        }
        
        &:focus {
            box-shadow: 0 0 0 3px rgba($fus-primary-color, 0.2);
        }
        
        &:disabled {
            background-color: $fus-text-muted;
            transform: none;
            box-shadow: none;
            
            &.loading {
                background-color: $fus-primary-color;
            }
        }
        
        &.loading {
            color: transparent;
            
            &::after {
                content: '';
                position: absolute;
                top: 50%;
                left: 50%;
                transform: translate(-50%, -50%);
                width: 20px;
                height: 20px;
                border: 2px solid rgba(255, 255, 255, 0.3);
                border-top: 2px solid white;
                border-radius: 50%;
                animation: fus-spin 0.8s linear infinite;
            }
        }
    }
    
    .fus-message {
        margin-bottom: 24px;
        padding: 14px 16px;
        border-radius: 8px;
        border: 1px solid;
        font-size: 14px;
        line-height: 1.5;
        font-weight: 400;
        
        &.error {
            background-color: $fus-error-bg;
            color: $fus-error-text;
            border-color: $fus-error-border;
        }
        
        &.success {
            background-color: $fus-success-bg;
            color: $fus-success-color;
            border-color: $fus-success-border;
        }
    }
    
    .fus-password-note {
        font-size: 13px;
        color: $fus-text-secondary;
        font-style: normal;
        margin: 0;
        text-align: center;
        padding: 12px 0;
        line-height: 1.4;
    }
    
    .fus-form.loading {
        &::before {
            background: rgba(255, 255, 255, 0.95);
            border-radius: 8px;
            backdrop-filter: blur(2px);
        }
        
        &::after {
            width: 32px;
            height: 32px;
            border: 2px solid $fus-border-color;
            border-top: 2px solid $fus-primary-color;
            border-radius: 50%;
            animation: fus-spin 0.8s linear infinite;
        }
    }
    
    // Dark mode for modern minimal
    @media (prefers-color-scheme: dark) {
        .fus-login-form-wrap,
        .fus-register-form-wrap {
            background: #1f2937;
            border-color: #374151;
            box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px 0 rgba(0, 0, 0, 0.2);
        }
        
        .fus-form-group label {
            color: #f9fafb;
        }
        
        .fus-form-control {
            background-color: #374151;
            border-color: #4b5563;
            color: #f9fafb;
            
            &:focus {
                border-color: lighten($fus-primary-color, 10%);
            }
            
            &::placeholder {
                color: #9ca3af;
            }
        }
        
        .fus-password-note {
            color: #d1d5db;
        }
        
        .fus-message {
            &.error {
                background-color: rgba($fus-error-color, 0.1);
                color: lighten($fus-error-color, 20%);
                border-color: rgba($fus-error-border, 0.3);
            }
            
            &.success {
                background-color: rgba($fus-success-color, 0.1);
                color: lighten($fus-success-color, 20%);
                border-color: rgba($fus-success-border, 0.3);
            }
        }
    }
    
    // Responsive
    @media (max-width: 640px) {
        .fus-login-form-wrap,
        .fus-register-form-wrap {
            margin: 16px;
            padding: 24px 20px;
        }
        
        .fus-form-group {
            margin-bottom: 20px;
        }
        
        .fus-submit-btn {
            padding: 16px 20px;
            font-size: 16px;
        }
    }
}

// Design 2: Card/Panel Style (PRO)
.fus-design-card-panel {
    .fus-login-form-wrap,
    .fus-register-form-wrap {
        max-width: 450px;
        margin: 40px auto;
        padding: 40px 36px;
        background: #ffffff;
        border-radius: 16px;
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1), 0 4px 16px rgba(0, 0, 0, 0.08);
        border: 1px solid rgba(255, 255, 255, 0.8);
        position: relative;
        
        &::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
            border-radius: 16px 16px 0 0;
        }
    }
    
    .fus-form-group {
        margin-bottom: 28px;
        
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: $fus-text-primary;
            font-size: 15px;
        }
    }
    
    .fus-form-control {
        padding: 16px 20px;
        border: 2px solid #e5e7eb;
        border-radius: 12px;
        font-size: 16px;
        transition: all 0.2s ease;
        
        &:focus {
            border-color: #667eea;
            box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
            transform: translateY(-1px);
        }
    }
    
    .fus-submit-btn {
        padding: 16px 24px;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        border-radius: 12px;
        font-size: 16px;
        font-weight: 600;
        box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
        
        &:hover:not(:disabled) {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4);
        }
    }
    
    .fus-message {
        margin-bottom: 28px;
        padding: 16px 20px;
        border-radius: 12px;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    }
}

// Design 3: Split Screen (PRO)
.fus-design-split-screen {
    .fus-login-form-wrap,
    .fus-register-form-wrap {
        max-width: 900px;
        margin: 20px auto;
        padding: 0;
        display: flex;
        min-height: 600px;
        border-radius: 16px;
        overflow: hidden;
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
        
        &::before {
            content: '';
            flex: 1;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }
        
        .fus-form {
            flex: 1;
            padding: 60px 48px;
            background: white;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        
        @media (max-width: 768px) {
            flex-direction: column;
            
            &::before {
                min-height: 200px;
            }
            
            .fus-form {
                padding: 32px 24px;
            }
        }
    }
    
    .fus-form-group {
        margin-bottom: 24px;
        
        label {
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 8px;
        }
    }
    
    .fus-form-control {
        padding: 14px 16px;
        border: 1px solid #e5e7eb;
        border-radius: 8px;
        font-size: 15px;
    }
    
    .fus-submit-btn {
        padding: 16px 24px;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        border-radius: 8px;
        font-weight: 600;
    }
}

// Design 4: Gradient Background (PRO)
.fus-design-gradient-bg {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    
    .fus-login-form-wrap,
    .fus-register-form-wrap {
        max-width: 420px;
        margin: 0;
        padding: 36px 32px;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        border-radius: 20px;
        box-shadow: 0 15px 50px rgba(0, 0, 0, 0.1);
    }
    
    .fus-form-group {
        margin-bottom: 24px;
        
        label {
            font-weight: 600;
            color: #374151;
        }
    }
    
    .fus-form-control {
        padding: 14px 18px;
        background: rgba(255, 255, 255, 0.9);
        border: 2px solid rgba(255, 255, 255, 0.3);
        border-radius: 12px;
        
        &:focus {
            background: white;
            border-color: #667eea;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
        }
    }
    
    .fus-submit-btn {
        padding: 16px 24px;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        border-radius: 12px;
        font-weight: 600;
        
        &:hover:not(:disabled) {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
        }
    }
}

// Design 5: Glassmorphism (PRO)
.fus-design-glassmorphism {
    min-height: 100vh;
    background: linear-gradient(135deg, #74b9ff 0%, #0984e3 100%);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    
    &::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="20" cy="20" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="40" r="0.5" fill="rgba(255,255,255,0.1)"/><circle cx="40" cy="80" r="1.5" fill="rgba(255,255,255,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
        opacity: 0.3;
        z-index: -1;
    }
    
    .fus-login-form-wrap,
    .fus-register-form-wrap {
        max-width: 400px;
        margin: 0;
        padding: 32px 28px;
        background: rgba(255, 255, 255, 0.15);
        backdrop-filter: blur(15px);
        border-radius: 20px;
        border: 1px solid rgba(255, 255, 255, 0.3);
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    }
    
    .fus-form-group {
        margin-bottom: 24px;
        
        label {
            color: white;
            font-weight: 500;
        }
    }
    
    .fus-form-control {
        padding: 14px 16px;
        background: rgba(255, 255, 255, 0.2);
        border: 1px solid rgba(255, 255, 255, 0.3);
        border-radius: 12px;
        color: white;
        
        &::placeholder {
            color: rgba(255, 255, 255, 0.7);
        }
        
        &:focus {
            background: rgba(255, 255, 255, 0.25);
            border-color: rgba(255, 255, 255, 0.5);
            box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
        }
    }
    
    .fus-submit-btn {
        padding: 16px 24px;
        background: rgba(255, 255, 255, 0.2);
        border: 1px solid rgba(255, 255, 255, 0.3);
        color: white;
        backdrop-filter: blur(10px);
        border-radius: 12px;
        
        &:hover:not(:disabled) {
            background: rgba(255, 255, 255, 0.3);
            transform: translateY(-1px);
        }
    }
    
    .fus-password-note {
        color: rgba(255, 255, 255, 0.8);
    }
}

// Design 6: Borderless/Flat (PRO)
.fus-design-borderless-flat {
    .fus-login-form-wrap,
    .fus-register-form-wrap {
        max-width: 380px;
        margin: 0 auto;
        padding: 24px 0;
        background: transparent;
        box-shadow: none;
        border: none;
    }
    
    .fus-form-group {
        position: relative;
        margin-bottom: 32px;
        
        label {
            position: absolute;
            left: 0;
            top: 16px;
            color: #9ca3af;
            font-size: 16px;
            font-weight: 400;
            transition: all 0.2s ease;
            pointer-events: none;
            background: transparent;
        }
        
        &:focus-within label,
        &.has-value label {
            top: -8px;
            font-size: 12px;
            color: #2563eb;
            font-weight: 500;
        }
    }
    
    .fus-form-control {
        border: none;
        border-bottom: 2px solid #e5e7eb;
        border-radius: 0;
        padding: 16px 0;
        background: transparent;
        font-size: 16px;
        
        &:focus {
            border-bottom-color: #2563eb;
            box-shadow: none;
        }
        
        &.error {
            border-bottom-color: #dc2626;
        }
    }
    
    .fus-submit-btn {
        border: none;
        border-radius: 0;
        padding: 18px 0;
        background: #1f2937;
        color: white;
        font-weight: 500;
        letter-spacing: 0.5px;
        
        &:hover:not(:disabled) {
            background: #111827;
            transform: none;
            box-shadow: none;
        }
    }
    
    .fus-message {
        border: none;
        border-radius: 0;
        padding: 16px 0;
        background: transparent;
        
        &.error {
            color: #dc2626;
            border-left: 4px solid #dc2626;
            padding-left: 16px;
        }
        
        &.success {
            color: #059669;
            border-left: 4px solid #059669;
            padding-left: 16px;
        }
    }
}

// Design 7: Corporate/Professional (PRO)
.fus-design-/**
 * Login/Register Form Design Variants
 * Different visual designs for forms
 */

// Design 2: Card/Panel Style (PRO)
.fus-design-card-panel {
    .fus-login-form-wrap,
    .fus-register-form-wrap {
        max-width: 450px;
        margin: 40px auto;
        padding: 40px 36px;
        background: #ffffff;
        border-radius: 16px;
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1), 0 4px 16px rgba(0, 0, 0, 0.08);
        border: 1px solid rgba(255, 255, 255, 0.8);
        position: relative;
        
        &::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
            border-radius: 16px 16px 0 0;
        }
        
        .fus-submit-btn {
            padding: 16px 24px;
            border-radius: 12px;
            font-size: 16px;
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
            
            &:hover:not(:disabled) {
                transform: translateY(-2px);
                box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4);
            }
        }
    }
}

// Design 3: Split Screen (PRO)
.fus-design-split-screen {
    .fus-login-form-wrap,
    .fus-register-form-wrap {
        max-width: 900px;
        margin: 20px auto;
        padding: 0;
        display: flex;
        min-height: 600px;
        border-radius: 16px;
        overflow: hidden;
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
        
        &::before {
            content: '';
            flex: 1;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            
            // Add brand content here with ::after
        }
        
        .fus-form {
            flex: 1;
            padding: 60px 48px;
            background: white;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        
        @media (max-width: 768px) {
            flex-direction: column;
            
            &::before {
                min-height: 200px;
            }
        }
    }
}

// Design 4: Gradient Background (PRO)
.fus-design-gradient-bg {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    
    .fus-login-form-wrap,
    .fus-register-form-wrap {
        max-width: 420px;
        margin: 0;
        padding: 36px 32px;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        border-radius: 20px;
        box-shadow: 0 15px 50px rgba(0, 0, 0, 0.1);
        
        .fus-submit-btn {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border-radius: 12px;
            padding: 16px 24px;
            
            &:hover:not(:disabled) {
                transform: translateY(-2px);
                box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
            }
        }
        
        .fus-form-control {
            background: rgba(255, 255, 255, 0.9);
            border: 2px solid rgba(255, 255, 255, 0.3);
            
            &:focus {
                background: white;
                border-color: #667eea;
                box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
            }
        }
    }
}

// Design 5: Glassmorphism (PRO)
.fus-design-glassmorphism {
    min-height: 100vh;
    background: linear-gradient(135deg, #74b9ff 0%, #0984e3 100%);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    
    &::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="20" cy="20" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="40" r="0.5" fill="rgba(255,255,255,0.1)"/><circle cx="40" cy="80" r="1.5" fill="rgba(255,255,255,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
        opacity: 0.3;
        z-index: -1;
    }
    
    .fus-login-form-wrap,
    .fus-register-form-wrap {
        max-width: 400px;
        margin: 0;
        padding: 32px 28px;
        background: rgba(255, 255, 255, 0.15);
        backdrop-filter: blur(15px);
        border-radius: 20px;
        border: 1px solid rgba(255, 255, 255, 0.3);
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
        
        .fus-form-group label {
            color: white;
            font-weight: 500;
        }
        
        .fus-form-control {
            background: rgba(255, 255, 255, 0.2);
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: white;
            
            &::placeholder {
                color: rgba(255, 255, 255, 0.7);
            }
            
            &:focus {
                background: rgba(255, 255, 255, 0.25);
                border-color: rgba(255, 255, 255, 0.5);
                box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
            }
        }
        
        .fus-submit-btn {
            background: rgba(255, 255, 255, 0.2);
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: white;
            backdrop-filter: blur(10px);
            
            &:hover:not(:disabled) {
                background: rgba(255, 255, 255, 0.3);
                transform: translateY(-1px);
            }
        }
        
        .fus-password-note {
            color: rgba(255, 255, 255, 0.8);
        }
    }
}

// Design 6: Borderless/Flat (PRO)
.fus-design-borderless-flat {
    .fus-login-form-wrap,
    .fus-register-form-wrap {
        max-width: 380px;
        margin: 0 auto;
        padding: 24px 0;
        background: transparent;
        box-shadow: none;
        border: none;
        
        .fus-form-control {
            border: none;
            border-bottom: 2px solid #e5e7eb;
            border-radius: 0;
            padding: 16px 0;
            background: transparent;
            font-size: 16px;
            
            &:focus {
                border-bottom-color: #2563eb;
                box-shadow: none;
            }
            
            &.error {
                border-bottom-color: #dc2626;
            }
        }
        
        .fus-form-group {
            position: relative;
            margin-bottom: 32px;
            
            label {
                position: absolute;
                left: 0;
                top: 16px;
                color: #9ca3af;
                font-size: 16px;
                font-weight: 400;
                transition: all 0.2s ease;
                pointer-events: none;
                background: transparent;
            }
            
            &:focus-within label,
            &.has-value label {
                top: -8px;
                font-size: 12px;
                color: #2563eb;
                font-weight: 500;
            }
        }
        
        .fus-submit-btn {
            border: none;
            border-radius: 0;
            padding: 18px 0;
            background: #1f2937;
            color: white;
            font-weight: 500;
            letter-spacing: 0.5px;
            
            &:hover:not(:disabled) {
                background: #111827;
                transform: none;
                box-shadow: none;
            }
        }
        
        .fus-message {
            border: none;
            border-radius: 0;
            padding: 16px 0;
            background: transparent;
            
            &.error {
                color: #dc2626;
                border-left: 4px solid #dc2626;
                padding-left: 16px;
            }
            
            &.success {
                color: #059669;
                border-left: 4px solid #059669;
                padding-left: 16px;
            }
        }
    }
}

// Design 7: Corporate/Professional (PRO)
.fus-design-corporate {
    .fus-login-form-wrap,
    .fus-register-form-wrap {
        max-width: 420px;
        margin: 0 auto;
        padding: 40px 32px;
        background: #ffffff;
        border: 2px solid #e5e7eb;
        border-radius: 4px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        
        .fus-form-control {
            border: 2px solid #d1d5db;
            border-radius: 4px;
            padding: 12px 16px;
            font-size: 14px;
            
            &:focus {
                border-color: #1e40af;
                box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
            }
        }
        
        .fus-form-group label {
            color: #374151;
            font-weight: 600;
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        
        .fus-submit-btn {
            background: #1e40af;
            border-radius: 4px;
            padding: 14px 24px;
            font-size: 14px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            
            &:hover:not(:disabled) {
                background: #1e3a8a;
                transform: none;
                box-shadow: 0 2px 4px rgba(30, 64, 175, 0.2);
            }
        }
        
        .fus-message {
            border-radius: 4px;
            font-size: 13px;
            
            &.error {
                background: #fef2f2;
                border-color: #fca5a5;
                color: #991b1b;
            }
            
            &.success {
                background: #f0fdf4;
                border-color: #86efac;
                color: #166534;
            }
        }
    }
}

// Design 8: Playful/Colorful (PRO)
.fus-design-playful-colorful {
    background: linear-gradient(45deg, #ff9a9e 0%, #fecfef 50%, #fecfef 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    
    .fus-login-form-wrap,
    .fus-register-form-wrap {
        max-width: 420px;
        margin: 0;
        padding: 36px 32px;
        background: white;
        border-radius: 24px;
        box-shadow: 0 20px 60px rgba(255, 154, 158, 0.3);
        position: relative;
        
        &::before {
            content: '🎉';
            position: absolute;
            top: -20px;
            right: 20px;
            font-size: 40px;
            z-index: 1;
        }
        
        .fus-form-control {
            border: 3px solid #fecfef;
            border-radius: 16px;
            padding: 16px 20px;
            font-size: 16px;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            
            &:focus {
                border-color: #f472b6;
                box-shadow: 0 0 0 4px rgba(244, 114, 182, 0.1);
                transform: scale(1.02);
            }
        }
        
        .fus-form-group label {
            color: #be185d;
            font-weight: 700;
            font-size: 15px;
        }
        
        .fus-submit-btn {
            background: linear-gradient(45deg, #f472b6, #ec4899, #db2777);
            border-radius: 16px;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 700;
            box-shadow: 0 8px 24px rgba(244, 114, 182, 0.4);
            
            &:hover:not(:disabled) {
                transform: translateY(-3px) scale(1.02);
                box-shadow: 0 12px 32px rgba(244, 114, 182, 0.5);
            }
            
            &:active:not(:disabled) {
                transform: translateY(-1px) scale(1.01);
            }
        }
        
        .fus-message {
            border-radius: 16px;
            font-weight: 600;
            
            &.error {
                background: linear-gradient(45deg, #fef2f2, #fce7e7);
                border-color: #fca5a5;
                color: #be185d;
            }
            
            &.success {
                background: linear-gradient(45deg, #f0fdf4, #e7fce7);
                border-color: #86efac;
                color: #059669;
            }
        }
        
        .fus-password-note {
            color: #be185d;
            font-weight: 500;
        }
    }
}

// Responsive adjustments for all designs
@media (max-width: 640px) {
    .fus-design-card-panel,
    .fus-design-gradient-bg,
    .fus-design-glassmorphism,
    .fus-design-corporate,
    .fus-design-playful-colorful {
        .fus-login-form-wrap,
        .fus-register-form-wrap {
            margin: 16px;
            padding: 24px 20px;
        }
    }
    
    .fus-design-split-screen {
        .fus-login-form-wrap,
        .fus-register-form-wrap {
            margin: 16px;
            
            .fus-form {
                padding: 32px 24px;
            }
        }
    }
}