/* ================================================================
   WBS Components — Design Kit v2
   Weiss Business Systems
   ================================================================ */

/* ----------------------------------------------------------------
   1. Design Tokens
   ---------------------------------------------------------------- */
:root {
    /* Colors */
    --wbs-primary: #1e40af;
    --wbs-primary-hover: #1e3a8a;
    --wbs-primary-light: #dbeafe;
    --wbs-primary-50: #eff6ff;
    --wbs-danger: #b91c1c;
    --wbs-danger-light: #fee2e2;
    --wbs-success: #15803d;
    --wbs-success-light: #dcfce7;
    --wbs-warning: #d97706;
    --wbs-warning-light: #fef3c7;
    --wbs-info: #0369a1;
    --wbs-info-light: #e0f2fe;

    /* Grays */
    --wbs-gray-50: #f9fafb;
    --wbs-gray-100: #f3f4f6;
    --wbs-gray-200: #e5e7eb;
    --wbs-gray-300: #d1d5db;
    --wbs-gray-400: #9ca3af;
    --wbs-gray-500: #6b7280;
    --wbs-gray-600: #4b5563;
    --wbs-gray-700: #374151;
    --wbs-gray-800: #1f2937;
    --wbs-gray-900: #111827;

    /* Spacing */
    --wbs-space-xs: 0.25rem;
    --wbs-space-sm: 0.5rem;
    --wbs-space-md: 1rem;
    --wbs-space-lg: 1.5rem;
    --wbs-space-xl: 2rem;
    --wbs-space-2xl: 3rem;

    /* Typography */
    --wbs-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --wbs-font-mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;
    --wbs-text-xs: 0.75rem;
    --wbs-text-sm: 0.875rem;
    --wbs-text-base: 1rem;
    --wbs-text-lg: 1.125rem;
    --wbs-text-xl: 1.25rem;
    --wbs-text-2xl: 1.5rem;

    /* Shapes */
    --wbs-radius-sm: 4px;
    --wbs-radius: 6px;
    --wbs-radius-lg: 8px;
    --wbs-radius-xl: 12px;
    --wbs-radius-full: 9999px;

    /* Shadows (Stripe-like) */
    --wbs-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --wbs-shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --wbs-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --wbs-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --wbs-transition: 150ms ease;
}

/* ----------------------------------------------------------------
   2. Buttons
   ---------------------------------------------------------------- */
.wbs-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--wbs-space-sm);
    padding: 0.5rem 1rem;
    min-height: 36px;
    font-family: var(--wbs-font);
    font-size: var(--wbs-text-sm);
    font-weight: 500;
    line-height: 1.25;
    color: var(--wbs-gray-700);
    background: #fff;
    border: 1px solid var(--wbs-gray-300);
    border-radius: var(--wbs-radius);
    cursor: pointer;
    transition: all var(--wbs-transition);
    text-decoration: none;
    white-space: nowrap;
    -webkit-appearance: none;
}

.wbs-btn:hover {
    background: var(--wbs-gray-50);
    border-color: var(--wbs-gray-400);
}

.wbs-btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.3);
}

.wbs-btn:disabled,
.wbs-btn[aria-disabled="true"] {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* Primary */
.wbs-btn--primary {
    color: #fff;
    background: var(--wbs-primary);
    border-color: var(--wbs-primary);
}

.wbs-btn--primary:hover {
    background: var(--wbs-primary-hover);
    border-color: var(--wbs-primary-hover);
}

/* Danger */
.wbs-btn--danger {
    color: #fff;
    background: var(--wbs-danger);
    border-color: var(--wbs-danger);
}

.wbs-btn--danger:hover {
    background: #991b1b;
    border-color: #991b1b;
}

/* Success */
.wbs-btn--success {
    color: #fff;
    background: var(--wbs-success);
    border-color: var(--wbs-success);
}

.wbs-btn--success:hover {
    background: #166534;
    border-color: #166534;
}

/* Ghost */
.wbs-btn--ghost {
    color: var(--wbs-primary);
    background: transparent;
    border-color: transparent;
}

.wbs-btn--ghost:hover {
    background: var(--wbs-primary-50);
}

/* Sizes */
.wbs-btn--sm {
    padding: 0.25rem 0.625rem;
    min-height: 28px;
    font-size: var(--wbs-text-xs);
}

.wbs-btn--lg {
    padding: 0.625rem 1.5rem;
    min-height: 44px;
    font-size: var(--wbs-text-base);
}

/* ----------------------------------------------------------------
   3. Inputs
   ---------------------------------------------------------------- */
.wbs-input,
.wbs-select,
.wbs-textarea {
    display: block;
    width: 100%;
    padding: 0.5rem 0.75rem;
    font-family: var(--wbs-font);
    font-size: var(--wbs-text-sm);
    line-height: 1.5;
    color: var(--wbs-gray-900);
    background: #fff;
    border: 1px solid var(--wbs-gray-300);
    border-radius: var(--wbs-radius);
    transition: border-color var(--wbs-transition), box-shadow var(--wbs-transition);
    -webkit-appearance: none;
}

.wbs-input:focus,
.wbs-select:focus,
.wbs-textarea:focus {
    outline: none;
    border-color: var(--wbs-primary);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.15);
}

.wbs-input::placeholder,
.wbs-textarea::placeholder {
    color: var(--wbs-gray-400);
}

/* Error state */
.wbs-input--error {
    border-color: var(--wbs-danger);
}

.wbs-input--error:focus {
    border-color: var(--wbs-danger);
    box-shadow: 0 0 0 3px rgba(185, 28, 28, 0.15);
}

/* Select arrow */
.wbs-select {
    padding-right: 2.5rem;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpath d='M4 6l4 4 4-4'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 16px;
}

/* Textarea */
.wbs-textarea {
    min-height: 80px;
    resize: vertical;
}

/* Checkbox & Radio */
.wbs-checkbox,
.wbs-radio {
    display: inline-flex;
    align-items: center;
    gap: var(--wbs-space-sm);
    font-family: var(--wbs-font);
    font-size: var(--wbs-text-sm);
    color: var(--wbs-gray-700);
    cursor: pointer;
}

.wbs-checkbox input[type="checkbox"],
.wbs-radio input[type="radio"] {
    width: 16px;
    height: 16px;
    margin: 0;
    accent-color: var(--wbs-primary);
    cursor: pointer;
}

/* Label */
.wbs-label {
    display: block;
    margin-bottom: var(--wbs-space-xs);
    font-family: var(--wbs-font);
    font-size: var(--wbs-text-sm);
    font-weight: 500;
    color: var(--wbs-gray-700);
}

/* Help text */
.wbs-help {
    margin-top: var(--wbs-space-xs);
    font-size: var(--wbs-text-xs);
    color: var(--wbs-gray-500);
}

.wbs-help--error {
    color: var(--wbs-danger);
}

/* Form group */
.wbs-form-group {
    margin-bottom: var(--wbs-space-lg);
}

/* ----------------------------------------------------------------
   4. Cards
   ---------------------------------------------------------------- */
.wbs-card {
    background: #fff;
    border: 1px solid var(--wbs-gray-200);
    border-radius: var(--wbs-radius-lg);
    box-shadow: var(--wbs-shadow-sm);
    overflow: hidden;
}

.wbs-card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--wbs-space-md);
    padding: var(--wbs-space-lg) var(--wbs-space-xl);
    border-bottom: 1px solid var(--wbs-gray-200);
}

.wbs-card__header h2,
.wbs-card__header h3 {
    margin: 0;
    font-family: var(--wbs-font);
    font-size: var(--wbs-text-lg);
    font-weight: 600;
    color: var(--wbs-gray-900);
}

.wbs-card__body {
    padding: var(--wbs-space-xl);
}

.wbs-card__footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--wbs-space-sm);
    padding: var(--wbs-space-lg) var(--wbs-space-xl);
    border-top: 1px solid var(--wbs-gray-200);
    background: var(--wbs-gray-50);
}

/* ----------------------------------------------------------------
   5. Tables
   ---------------------------------------------------------------- */
.wbs-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--wbs-font);
    font-size: var(--wbs-text-sm);
}

.wbs-table th {
    position: sticky;
    top: 0;
    z-index: 1;
    padding: 0.75rem 1rem;
    font-weight: 600;
    color: var(--wbs-gray-600);
    text-align: left;
    background: var(--wbs-gray-50);
    border-bottom: 2px solid var(--wbs-gray-200);
    white-space: nowrap;
}

.wbs-table td {
    padding: 0.75rem 1rem;
    color: var(--wbs-gray-700);
    border-bottom: 1px solid var(--wbs-gray-100);
    vertical-align: middle;
}

.wbs-table tbody tr:hover {
    background: var(--wbs-gray-50);
}

/* Striped */
.wbs-table--striped tbody tr:nth-child(even) {
    background: var(--wbs-gray-50);
}

.wbs-table--striped tbody tr:hover {
    background: var(--wbs-gray-100);
}

/* Compact */
.wbs-table--compact th,
.wbs-table--compact td {
    padding: 0.375rem 0.75rem;
}

/* ----------------------------------------------------------------
   6. Badges
   ---------------------------------------------------------------- */
.wbs-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.125rem 0.5rem;
    font-family: var(--wbs-font);
    font-size: var(--wbs-text-xs);
    font-weight: 500;
    line-height: 1.5;
    border-radius: var(--wbs-radius-full);
    white-space: nowrap;
    color: var(--wbs-gray-700);
    background: var(--wbs-gray-100);
}

.wbs-badge--success {
    color: var(--wbs-success);
    background: var(--wbs-success-light);
}

.wbs-badge--warning {
    color: var(--wbs-warning);
    background: var(--wbs-warning-light);
}

.wbs-badge--danger {
    color: var(--wbs-danger);
    background: var(--wbs-danger-light);
}

.wbs-badge--info {
    color: var(--wbs-info);
    background: var(--wbs-info-light);
}

.wbs-badge--neutral {
    color: var(--wbs-gray-600);
    background: var(--wbs-gray-100);
}

/* ----------------------------------------------------------------
   7. Alerts
   ---------------------------------------------------------------- */
.wbs-alert {
    display: flex;
    align-items: flex-start;
    gap: var(--wbs-space-sm);
    padding: var(--wbs-space-md) var(--wbs-space-lg);
    font-family: var(--wbs-font);
    font-size: var(--wbs-text-sm);
    line-height: 1.5;
    border-radius: var(--wbs-radius-lg);
    border: 1px solid var(--wbs-gray-200);
    background: var(--wbs-gray-50);
    color: var(--wbs-gray-700);
}

.wbs-alert--success {
    color: var(--wbs-success);
    background: var(--wbs-success-light);
    border-color: #bbf7d0;
}

.wbs-alert--warning {
    color: #92400e;
    background: var(--wbs-warning-light);
    border-color: #fde68a;
}

.wbs-alert--error {
    color: var(--wbs-danger);
    background: var(--wbs-danger-light);
    border-color: #fecaca;
}

.wbs-alert--info {
    color: var(--wbs-info);
    background: var(--wbs-info-light);
    border-color: #bae6fd;
}

/* ----------------------------------------------------------------
   8. Tabs
   ---------------------------------------------------------------- */
.wbs-tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--wbs-gray-200);
    font-family: var(--wbs-font);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.wbs-tab {
    display: inline-flex;
    align-items: center;
    gap: var(--wbs-space-xs);
    padding: 0.625rem 1rem;
    font-size: var(--wbs-text-sm);
    font-weight: 500;
    color: var(--wbs-gray-500);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    cursor: pointer;
    white-space: nowrap;
    transition: color var(--wbs-transition), border-color var(--wbs-transition);
}

.wbs-tab:hover {
    color: var(--wbs-gray-700);
}

.wbs-tab--active,
.wbs-tab[aria-selected="true"] {
    color: var(--wbs-primary);
    border-bottom-color: var(--wbs-primary);
}

.wbs-tab:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.3);
    border-radius: var(--wbs-radius-sm) var(--wbs-radius-sm) 0 0;
}

/* Tab panel */
.wbs-tab-panel {
    display: none;
    padding: var(--wbs-space-xl) 0;
}

.wbs-tab-panel--active,
.wbs-tab-panel[aria-hidden="false"] {
    display: block;
}

/* ----------------------------------------------------------------
   9. Grid
   ---------------------------------------------------------------- */
.wbs-grid {
    display: grid;
    gap: var(--wbs-space-lg);
}

.wbs-grid--2 {
    grid-template-columns: repeat(2, 1fr);
}

.wbs-grid--3 {
    grid-template-columns: repeat(3, 1fr);
}

.wbs-grid--4 {
    grid-template-columns: repeat(4, 1fr);
}

/* ----------------------------------------------------------------
   10. Empty State
   ---------------------------------------------------------------- */
.wbs-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--wbs-space-2xl) var(--wbs-space-xl);
    text-align: center;
}

.wbs-empty__icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--wbs-space-md);
    color: var(--wbs-gray-300);
}

.wbs-empty__icon svg {
    width: 100%;
    height: 100%;
}

.wbs-empty__title {
    margin: 0 0 var(--wbs-space-xs);
    font-family: var(--wbs-font);
    font-size: var(--wbs-text-base);
    font-weight: 600;
    color: var(--wbs-gray-700);
}

.wbs-empty__text {
    margin: 0 0 var(--wbs-space-lg);
    font-family: var(--wbs-font);
    font-size: var(--wbs-text-sm);
    color: var(--wbs-gray-500);
    max-width: 320px;
}

/* ----------------------------------------------------------------
   11. Spinner
   ---------------------------------------------------------------- */
@keyframes wbs-spin {
    to { transform: rotate(360deg); }
}

.wbs-spinner {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid var(--wbs-gray-200);
    border-top-color: var(--wbs-primary);
    border-radius: 50%;
    animation: wbs-spin 0.6s linear infinite;
}

.wbs-spinner--sm {
    width: 16px;
    height: 16px;
    border-width: 2px;
}

.wbs-spinner--lg {
    width: 40px;
    height: 40px;
    border-width: 4px;
}

/* ----------------------------------------------------------------
   12. Pagination
   ---------------------------------------------------------------- */
.wbs-pagination {
    display: flex;
    align-items: center;
    gap: var(--wbs-space-xs);
    font-family: var(--wbs-font);
    font-size: var(--wbs-text-sm);
}

.wbs-pagination a,
.wbs-pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: 0 0.5rem;
    color: var(--wbs-gray-700);
    background: #fff;
    border: 1px solid var(--wbs-gray-300);
    border-radius: var(--wbs-radius);
    text-decoration: none;
    transition: all var(--wbs-transition);
}

.wbs-pagination a:hover {
    background: var(--wbs-gray-50);
    border-color: var(--wbs-gray-400);
}

.wbs-pagination .current,
.wbs-pagination [aria-current="page"] {
    color: #fff;
    background: var(--wbs-primary);
    border-color: var(--wbs-primary);
    font-weight: 600;
}

.wbs-pagination .disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

/* ----------------------------------------------------------------
   13. Breadcrumb
   ---------------------------------------------------------------- */
.wbs-breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--wbs-space-xs);
    padding: 0;
    margin: 0 0 var(--wbs-space-lg);
    list-style: none;
    font-family: var(--wbs-font);
    font-size: var(--wbs-text-sm);
}

.wbs-breadcrumb li {
    display: inline-flex;
    align-items: center;
    gap: var(--wbs-space-xs);
    color: var(--wbs-gray-500);
}

.wbs-breadcrumb li + li::before {
    content: "/";
    color: var(--wbs-gray-300);
}

.wbs-breadcrumb a {
    color: var(--wbs-gray-600);
    text-decoration: none;
    transition: color var(--wbs-transition);
}

.wbs-breadcrumb a:hover {
    color: var(--wbs-primary);
}

.wbs-breadcrumb [aria-current="page"] {
    color: var(--wbs-gray-900);
    font-weight: 500;
}

/* ----------------------------------------------------------------
   14. Modal
   ---------------------------------------------------------------- */
.wbs-modal {
    position: fixed;
    inset: 0;
    z-index: 100000;
    display: none;
    align-items: center;
    justify-content: center;
}

.wbs-modal--open {
    display: flex;
}

.wbs-modal__overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
}

.wbs-modal__content {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 560px;
    max-height: 90vh;
    margin: var(--wbs-space-lg);
    background: #fff;
    border-radius: var(--wbs-radius-xl);
    box-shadow: var(--wbs-shadow-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.wbs-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--wbs-space-md);
    padding: var(--wbs-space-lg) var(--wbs-space-xl);
    border-bottom: 1px solid var(--wbs-gray-200);
}

.wbs-modal__header h2,
.wbs-modal__header h3 {
    margin: 0;
    font-family: var(--wbs-font);
    font-size: var(--wbs-text-lg);
    font-weight: 600;
    color: var(--wbs-gray-900);
}

.wbs-modal__close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    color: var(--wbs-gray-400);
    background: none;
    border: none;
    border-radius: var(--wbs-radius);
    cursor: pointer;
    transition: color var(--wbs-transition), background var(--wbs-transition);
}

.wbs-modal__close:hover {
    color: var(--wbs-gray-600);
    background: var(--wbs-gray-100);
}

.wbs-modal__body {
    padding: var(--wbs-space-xl);
    overflow-y: auto;
}

.wbs-modal__footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--wbs-space-sm);
    padding: var(--wbs-space-lg) var(--wbs-space-xl);
    border-top: 1px solid var(--wbs-gray-200);
    background: var(--wbs-gray-50);
}

/* ----------------------------------------------------------------
   15. Utilities
   ---------------------------------------------------------------- */
.wbs-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.wbs-text-muted {
    color: var(--wbs-gray-500);
}

.wbs-text-danger {
    color: var(--wbs-danger);
}

.wbs-text-success {
    color: var(--wbs-success);
}

.wbs-text-mono {
    font-family: var(--wbs-font-mono);
}

.wbs-truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.wbs-flex {
    display: flex;
}

.wbs-flex--between {
    justify-content: space-between;
}

.wbs-flex--center {
    align-items: center;
}

.wbs-flex--gap-sm {
    gap: var(--wbs-space-sm);
}

.wbs-flex--gap-md {
    gap: var(--wbs-space-md);
}

.wbs-mt-0 { margin-top: 0; }
.wbs-mb-0 { margin-bottom: 0; }
.wbs-mb-sm { margin-bottom: var(--wbs-space-sm); }
.wbs-mb-md { margin-bottom: var(--wbs-space-md); }
.wbs-mb-lg { margin-bottom: var(--wbs-space-lg); }
.wbs-mb-xl { margin-bottom: var(--wbs-space-xl); }