/* ============================================
   BIV WIKI PAGE - LIGHT THEME MODERN
   Class names: wk-* prefix
   ============================================ */

/* ── Variables ── */
:root {
    --wk-bg-card: #FFFFFF;
    --wk-border: #E2E8F0;
    --wk-text-main: #0F172A;
    --wk-text-sub: #64748B;
    --wk-accent: #6366F1;
}

/* ── Page container ── */
#page-wiki .page-inner {
    padding: 24px;
    max-width: 1400px;
    margin: 0 auto;
}

#page-wiki .page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    gap: 16px;
}

#page-wiki .page-header h2 {
    font-size: 24px;
    font-weight: 700;
    color: #0F172A;
    margin: 0;
}

#page-wiki .page-header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

#page-wiki .page-search {
    width: 320px;
    padding: 12px 16px;
    border: 1px solid #E2E8F0;
    border-radius: 12px;
    font-size: 14px;
    background: #FFFFFF;
    transition: all 0.2s;
    color: #0F172A;
}

#page-wiki .page-search:focus {
    outline: none;
    border-color: #6366F1;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* ── Add Button ── */
#page-wiki .wk-btn-primary,
#page-wiki #btnAddWiki {
    background: linear-gradient(135deg, #6366F1, #818CF8);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 6px -1px rgba(99, 102, 241, 0.2);
    transition: all 0.2s;
    white-space: nowrap;
}

#page-wiki .wk-btn-primary:hover,
#page-wiki #btnAddWiki:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(99, 102, 241, 0.3);
}

/* ── Stats Bar ── */
.wk-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    margin-bottom: 32px;
    background: #FFFFFF;
    border: 1px solid #E2E8F0;
    border-radius: 16px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    overflow: hidden;
}

.wk-stat {
    text-align: center;
    padding: 24px;
    position: relative;
}

.wk-stat:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    height: 40px;
    width: 1px;
    background: #E2E8F0;
}

.wk-stat-num {
    font-size: 32px;
    font-weight: 700;
    color: #0F172A;
    display: block;
    margin-bottom: 4px;
}

.wk-stat-label {
    font-size: 12px;
    color: #64748B;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ── Tabs ── */
.wk-tabs {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.wk-tab {
    padding: 10px 20px;
    border-radius: 20px;
    border: 1px solid #E2E8F0;
    background: #FFFFFF;
    color: #64748B;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.wk-tab:hover {
    border-color: #CBD5E1;
    color: #475569;
    background: #F8FAFC;
}

.wk-tab.active {
    background: #EEF2FF;
    border-color: #6366F1;
    color: #4F46E5;
    font-weight: 600;
}

.wk-tab[data-tab="pricing"].active {
    background: #FFFBEB;
    border-color: #F59E0B;
    color: #B45309;
}

.wk-tab[data-tab="product"].active {
    background: #ECFEFF;
    border-color: #06B6D4;
    color: #0891B2;
}

.wk-tab[data-tab="guide"].active {
    background: #ECFDF5;
    border-color: #10B981;
    color: #059669;
}

.wk-tab[data-tab="policy"].active {
    background: #F5F3FF;
    border-color: #8B5CF6;
    color: #7C3AED;
}

.wk-tab[data-tab="general"].active {
    background: #F1F5F9;
    border-color: #64748B;
    color: #475569;
}

/* ── Grid ── */
.wk-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: 24px;
    padding-bottom: 40px;
}

/* ── Cards ── */
.wk-card {
    background: #FFFFFF;
    border: 1px solid #E2E8F0;
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.wk-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    border-color: #C7D2FE;
}

.wk-card-pinned {
    border-color: #FDE68A;
    box-shadow: 0 1px 3px rgba(245, 158, 11, 0.1);
}

.wk-card-pinned:hover {
    border-color: #F59E0B;
}

.wk-card-accent {
    height: 4px;
    width: 100%;
}

.wk-card-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.wk-card-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    gap: 8px;
}

.wk-card-badge {
    font-size: 11px;
    font-weight: 700;
    padding: 6px 12px;
    border-radius: 6px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.wk-pin-badge {
    font-size: 11px;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 4px;
    background: #FEF3C7;
    color: #B45309;
    margin-right: 6px;
}

.wk-card-date {
    font-size: 12px;
    color: #94A3B8;
    white-space: nowrap;
}

.wk-card-title {
    font-size: 16px;
    font-weight: 600;
    color: #0F172A;
    margin: 0 0 12px;
    line-height: 1.5;
}

.wk-card-preview {
    font-size: 14px;
    color: #64748B;
    line-height: 1.6;
    margin: 0 0 16px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

.wk-card-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    border-top: 1px solid #E2E8F0;
    margin-top: auto;
}

.wk-card-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.wk-tag {
    font-size: 12px;
    color: #64748B;
    background: #F8FAFC;
    border: 1px solid #E2E8F0;
    padding: 4px 12px;
    border-radius: 20px;
    transition: all 0.2s;
}

.wk-tag:hover {
    background: #EEF2FF;
    border-color: #C7D2FE;
    color: #4F46E5;
}

.wk-card-author {
    font-size: 12px;
    color: #94A3B8;
}

/* ── Modal ── */
.wk-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(15, 23, 42, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.2s;
    backdrop-filter: blur(4px);
}

.wk-modal-overlay.open {
    opacity: 1;
}

.wk-modal {
    background: #FFFFFF;
    border: 1px solid #E2E8F0;
    border-radius: 16px;
    width: 600px;
    max-width: 95vw;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    color: #0F172A;
}

.wk-modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid #E2E8F0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.wk-modal-header h3 {
    margin: 0;
    color: #0F172A;
    font-size: 18px;
    font-weight: 700;
}

.wk-modal-close {
    background: none;
    border: none;
    color: #94A3B8;
    font-size: 24px;
    cursor: pointer;
    transition: color 0.2s;
}

.wk-modal-close:hover {
    color: #0F172A;
}

.wk-modal-body {
    padding: 24px;
}

.wk-field {
    margin-bottom: 20px;
}

.wk-field-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.wk-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: #64748B;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.wk-required {
    color: #EF4444;
}

.wk-input,
.wk-select,
.wk-textarea {
    width: 100%;
    padding: 12px;
    background: #F8FAFC;
    border: 1px solid #E2E8F0;
    border-radius: 8px;
    color: #0F172A;
    font-size: 14px;
    box-sizing: border-box;
    transition: all 0.2s;
    font-family: inherit;
}

.wk-input:focus,
.wk-select:focus,
.wk-textarea:focus {
    outline: none;
    border-color: #6366F1;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    background: #FFFFFF;
}

.wk-textarea {
    resize: vertical;
    min-height: 200px;
    line-height: 1.6;
}

.wk-modal-footer {
    padding: 20px 24px;
    border-top: 1px solid #E2E8F0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #F8FAFC;
    border-radius: 0 0 16px 16px;
}

.wk-modal-actions {
    display: flex;
    gap: 8px;
}

.wk-btn {
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid #E2E8F0;
    font-size: 14px;
    background: #FFFFFF;
    color: #475569;
    transition: all 0.2s;
}

.wk-btn:hover {
    background: #F1F5F9;
}

.wk-btn-primary {
    background: linear-gradient(135deg, #6366F1, #818CF8);
    color: white;
    border: none;
    box-shadow: 0 2px 4px rgba(99, 102, 241, 0.2);
}

.wk-btn-primary:hover {
    background: linear-gradient(135deg, #4F46E5, #6366F1);
    box-shadow: 0 4px 8px rgba(99, 102, 241, 0.3);
    transform: translateY(-1px);
}

.wk-btn-danger {
    background: transparent;
    color: #EF4444;
    border: 1px solid #FECACA;
}

.wk-btn-danger:hover {
    background: #FEF2F2;
    border-color: #EF4444;
}

/* ── Loading / Empty ── */
.wk-loading,
.wk-empty {
    text-align: center;
    color: #94A3B8;
    padding: 64px 24px;
}

.wk-empty-icon {
    font-size: 64px;
    margin-bottom: 16px;
    display: block;
    opacity: 0.3;
}

.wk-empty h3 {
    color: #475569;
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.wk-empty p {
    color: #94A3B8;
    font-size: 14px;
}

.wk-error {
    text-align: center;
    color: #EF4444;
    padding: 40px;
    background: #FEF2F2;
    border-radius: 12px;
    border: 1px solid #FECACA;
}

.wk-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid #E2E8F0;
    border-top-color: #6366F1;
    border-radius: 50%;
    animation: wk-spin 0.8s linear infinite;
    margin: 0 auto 16px;
}

@keyframes wk-spin {
    to {
        transform: rotate(360deg);
    }
}

/* ── View Modal (Read-only) ── */
.wkv-badges {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.wkv-badge {
    font-size: 11px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 6px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.wkv-title {
    font-size: 22px;
    font-weight: 700;
    color: #0F172A;
    margin: 0 0 20px;
    line-height: 1.4;
}

.wkv-content {
    font-size: 15px;
    color: #334155;
    line-height: 1.8;
    background: #F8FAFC;
    border-radius: 12px;
    padding: 20px;
    border: 1px solid #E2E8F0;
    margin-bottom: 20px;
    word-wrap: break-word;
}

.wkv-content strong {
    color: #0F172A;
}

.wkv-section {
    margin-bottom: 20px;
}

.wkv-section-label {
    font-size: 12px;
    font-weight: 600;
    color: #94A3B8;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.wkv-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.wkv-meta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 12px;
    color: #94A3B8;
    padding-top: 16px;
    border-top: 1px solid #E2E8F0;
    margin-top: 8px;
}

/* ── Responsive ── */
@media (max-width: 768px) {
    .wk-grid {
        grid-template-columns: 1fr;
    }

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

    .wk-stat:nth-child(2)::after {
        display: none;
    }

    #page-wiki .page-search {
        width: 100%;
    }

    #page-wiki .page-header {
        flex-direction: column;
        align-items: stretch;
    }

    .wk-field-row {
        grid-template-columns: 1fr;
    }
}