/**
 * API CAB Frontend Styles
 * Modern, accessible, and responsive design
 *
 * @package API_CAB
 * @since 1.0.0
 */

/* CSS Custom Properties (Design Tokens) */
@layer config {
    :root {
        /* Colors using OKLCH for better color consistency */
        --api-cab-primary: oklch(0.45 0.15 240);
        --api-cab-primary-hover: oklch(0.4 0.15 240);
        --api-cab-primary-light: oklch(0.9 0.05 240);
        --api-cab-success: oklch(0.6 0.15 140);
        --api-cab-success-light: oklch(0.95 0.05 140);
        --api-cab-error: oklch(0.55 0.15 20);
        --api-cab-error-light: oklch(0.95 0.05 20);
        --api-cab-warning: oklch(0.7 0.15 80);
        --api-cab-warning-light: oklch(0.95 0.05 80);
        
        /* Neutral colors */
        --api-cab-text: oklch(0.2 0 0);
        --api-cab-text-muted: oklch(0.5 0 0);
        --api-cab-border: oklch(0.8 0 0);
        --api-cab-background: oklch(0.98 0 0);
        --api-cab-surface: oklch(1 0 0);
        
        /* Spacing scale */
        --api-cab-space-xs: 0.25rem;
        --api-cab-space-sm: 0.5rem;
        --api-cab-space-md: 0.75rem;
        --api-cab-space-lg: 1rem;
        --api-cab-space-xl: 1.5rem;
        --api-cab-space-2xl: 2rem;
        
        /* Typography */
        --api-cab-font-size-sm: 0.875rem;
        --api-cab-font-size-base: 1rem;
        --api-cab-font-size-lg: 1.125rem;
        --api-cab-line-height-tight: 1.25;
        --api-cab-line-height-normal: 1.5;
        
        /* Border radius */
        --api-cab-radius-sm: 0.25rem;
        --api-cab-radius-md: 0.375rem;
        --api-cab-radius-lg: 0.5rem;
        
        /* Shadows */
        --api-cab-shadow-sm: 0 1px 2px 0 oklch(0 0 0 / 0.05);
        --api-cab-shadow-md: 0 4px 6px -1px oklch(0 0 0 / 0.1), 0 2px 4px -2px oklch(0 0 0 / 0.1);
        --api-cab-shadow-lg: 0 10px 15px -3px oklch(0 0 0 / 0.1), 0 4px 6px -4px oklch(0 0 0 / 0.1);
        
        /* Transitions */
        --api-cab-transition-fast: 150ms ease-in-out;
        --api-cab-transition-normal: 250ms ease-in-out;
        --api-cab-transition-slow: 350ms ease-in-out;
    }
}

/* Reset and base styles */
@layer resets {
    .api-cab-dni-validator *,
    .api-cab-dni-validator *::before,
    .api-cab-dni-validator *::after {
        box-sizing: border-box;
    }
}

/* Component styles */
@layer components {
    /* Main container */
    .c-dni-validator {
        margin-block: var(--api-cab-space-lg);
        padding: var(--api-cab-space-lg);
        background: var(--api-cab-surface);
        border: 1px solid var(--api-cab-border);
        border-radius: var(--api-cab-radius-lg);
        box-shadow: var(--api-cab-shadow-sm);
    }
    
    /* DNI group container */
    .c-dni-group {
        margin-block: var(--api-cab-space-md) var(--api-cab-space-sm);
        display: flex;
        flex-direction: column;
        gap: var(--api-cab-space-xs);
        position: relative;
    }
    
    /* Label styling */
    .c-dni-group__label {
        font-weight: bold;
    }
    
   
    /* Help text */
    .c-dni-group__help {
        font-size: var(--api-cab-font-size-sm);
        line-height: var(--api-cab-line-height-tight);
        margin-block-start: var(--api-cab-space-xs);
        min-block-size: 1.25rem;
        display: flex;
        align-items: center;
        gap: var(--api-cab-space-xs);
    }
    
    /* Help text icons */
    .c-dni-group__help-icon {
        inline-size: 1rem;
        block-size: 1rem;
        flex-shrink: 0;
    }
    
    /* Input states */
    .c-dni-group__input--searching {
        background-color: var(--api-cab-primary-light);
        border-color: var(--api-cab-primary);
        position: relative;
        padding-inline-end: 2.5rem;
    }
    
    .c-dni-group__input--searching::after {
        content: '';
        position: absolute;
        inset-inline-end: var(--api-cab-space-sm);
        inset-block-start: 50%;
        transform: translateY(-50%);
        inline-size: 1rem;
        block-size: 1rem;
        border: 2px solid var(--api-cab-primary);
        border-top-color: transparent;
        border-radius: 50%;
        animation: c-spin 1s linear infinite;
    }
    
    .c-dni-group__input--valid {
        border-color: var(--api-cab-success);
        background-color: var(--api-cab-success-light);
    }
    
    .c-dni-group__input--invalid {
        border-color: var(--api-cab-error);
        background-color: var(--api-cab-error-light);
    }
    
    /* Help text states */
    .c-dni-group__help--valid {
        color: var(--api-cab-success);
    }
    
    .c-dni-group__help--invalid {
        color: var(--api-cab-error);
    }
    
    .c-dni-group__help--warning {
        color: var(--api-cab-warning);
    }
}

/* Utility classes */
@layer utilities {
    /* Loading animation */
    @keyframes c-spin {
        from { transform: translateY(-50%) rotate(0deg); }
        to { transform: translateY(-50%) rotate(360deg); }
    }
    
    /* Screen reader only text */
    .u-sr-only {
        position: absolute;
        inline-size: 1px;
        block-size: 1px;
        padding: 0;
        margin: -1px;
        overflow: hidden;
        clip: rect(0, 0, 0, 0);
        white-space: nowrap;
        border: 0;
    }
    
    /* Focus visible for better keyboard navigation */
    .u-focus-visible:focus-visible {
        outline: 2px solid var(--api-cab-primary);
        outline-offset: 2px;
    }
    
/* Duplicate warning */
.c-duplicate-warning {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    margin-block-end: 1rem;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.25;
}

.c-duplicate-warning--error {
    background-color: oklch(0.95 0.05 20);
    color: oklch(0.3 0.15 20);
    border: 1px solid oklch(0.8 0.15 20);
}

/* Connectivity status */
.c-connectivity-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    margin-block-end: 1rem;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.25;
    animation: fadeIn 0.3s ease-in-out;
}

.c-connectivity-status--error {
    background-color: oklch(0.95 0.05 20);
    color: oklch(0.3 0.15 20);
    border: 1px solid oklch(0.8 0.15 20);
}

.c-connectivity-status--warning {
    background-color: oklch(0.95 0.05 60);
    color: oklch(0.3 0.15 60);
    border: 1px solid oklch(0.8 0.15 60);
}

.c-connectivity-status--success {
    background-color: oklch(0.95 0.05 140);
    color: oklch(0.3 0.15 140);
    border: 1px solid oklch(0.8 0.15 140);
}

.c-connectivity-status__icon {
    font-size: 1rem;
    flex-shrink: 0;
}

.c-connectivity-status__text {
    flex: 1;
}
    
    .c-duplicate-warning__icon {
        font-size: 1rem;
        flex-shrink: 0;
    }
    
    .c-duplicate-warning__text {
        flex: 1;
    }
}

/* Responsive design */
@media (max-width: 48rem) {
    .c-dni-group__input {
        max-inline-size: 100%;
    }
    
    .c-dni-group {
        margin-block: var(--api-cab-space-sm) var(--api-cab-space-xs);
    }
    
    .c-dni-validator {
        padding: var(--api-cab-space-md);
        margin-block: var(--api-cab-space-md);
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .c-dni-group__input {
        border-width: 3px;
    }
    
    .c-dni-group__input--valid {
        border-color: oklch(0 0 0);
        background-color: oklch(1 0 0);
    }
    
    .c-dni-group__input--invalid {
        border-color: oklch(0 0 0);
        background-color: oklch(1 0 0);
    }
    
    .c-dni-group__help--valid,
    .c-dni-group__help--invalid {
        font-weight: 600;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .c-dni-group__input {
        transition: none;
    }
    
    .c-dni-group__input--searching::after {
        animation: none;
    }
    
    @keyframes c-spin {
        from, to { transform: translateY(-50%) rotate(0deg); }
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --api-cab-text: oklch(0.9 0 0);
        --api-cab-text-muted: oklch(0.6 0 0);
        --api-cab-border: oklch(0.3 0 0);
        --api-cab-background: oklch(0.1 0 0);
        --api-cab-surface: oklch(0.15 0 0);
    }
    
    .c-duplicate-warning--error {
        background-color: oklch(0.2 0.05 20);
        color: oklch(0.8 0.15 20);
        border-color: oklch(0.4 0.15 20);
    }
    
    .c-connectivity-status--error {
        background-color: oklch(0.2 0.05 20);
        color: oklch(0.8 0.15 20);
        border-color: oklch(0.4 0.15 20);
    }
    
    .c-connectivity-status--warning {
        background-color: oklch(0.2 0.05 60);
        color: oklch(0.8 0.15 60);
        border-color: oklch(0.4 0.15 60);
    }
    
    .c-connectivity-status--success {
        background-color: oklch(0.2 0.05 140);
        color: oklch(0.8 0.15 140);
        border-color: oklch(0.4 0.15 140);
    }
}

/* Print styles */
@media print {
    .c-dni-validator {
        box-shadow: none;
        border: 1px solid oklch(0 0 0);
    }
    
    .c-dni-group__input--searching::after {
        display: none;
    }
}

/* Loader styles */
.c-dni-group__loader {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: oklch(0.6 0.15 250);
    font-size: 0.875rem;
    font-weight: 500;
}

.c-dni-group__loader-spinner {
    width: 1rem;
    height: 1rem;
    border: 2px solid oklch(0.9 0 0);
    border-top: 2px solid oklch(0.6 0.15 250);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Timeout warning styles */
.c-dni-group__timeout-warning {
    background-color: oklch(0.95 0.05 50);
    border: 1px solid oklch(0.8 0.1 50);
    border-radius: 0.375rem;
    padding: 0.75rem;
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: oklch(0.3 0.1 50);
}

.c-dni-group__timeout-warning--icon {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

/* Reduced motion support for loader */
@media (prefers-reduced-motion: reduce) {
    .c-dni-group__loader-spinner {
        animation: none;
        border-top-color: oklch(0.6 0.15 250);
    }
}