/**
 * CAISSA Library Page - Styles
 *
 * Consistent with CAISSA Chess design language.
 */

/* ========================================
   CSS VARIABLES (inherit from styles.css)
   ======================================== */

:root {
    --lib-bg-primary: #0b0f1a;
    --lib-bg-secondary: #141926;
    --lib-bg-hover: #1a2033;
    --lib-border-color: #2a3142;
    --lib-text-primary: #ffffff;
    --lib-text-secondary: #8b95a5;
    --lib-text-muted: #5a6474;
    --lib-accent-color: #4ecdc4;
    --lib-accent-hover: #3dbdb5;
    --lib-danger-color: #ff6b6b;
    --lib-warning-color: #ffc107;
    --lib-success-color: #4ecdc4;
}

/* ========================================
   PAGE BODY
   ======================================== */

.library-page-body {
    margin: 0;
    padding: 0;
    background: var(--lib-bg-primary);
    color: var(--lib-text-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ========================================
   NAVIGATION HEADER
   ======================================== */

.library-nav-header {
    background: var(--lib-bg-secondary);
    border-bottom: 1px solid var(--lib-border-color);
    padding: 12px 24px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.library-nav-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.library-nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 600;
    color: var(--lib-text-primary);
    text-decoration: none;
    transition: color 0.2s;
}

.library-nav-brand i {
    color: var(--lib-accent-color);
}

.library-nav-brand:hover {
    color: var(--lib-accent-color);
}

.library-nav-links {
    display: flex;
    gap: 8px;
}

.library-nav-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 6px;
    color: var(--lib-text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

.library-nav-link:hover {
    background: var(--lib-bg-hover);
    color: var(--lib-text-primary);
}

.library-nav-link.active {
    background: var(--lib-accent-color);
    color: var(--lib-bg-primary);
}

.library-nav-link.active:hover {
    background: var(--lib-accent-hover);
}

/* ========================================
   MAIN CONTENT
   ======================================== */

.library-main {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
    width: 100%;
    box-sizing: border-box;
}

/* ========================================
   HERO SECTION
   ======================================== */

.library-hero {
    text-align: center;
    padding: 40px 20px 32px;
}

.library-hero-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--lib-text-primary);
    margin: 0 0 12px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.library-hero-title i {
    color: var(--lib-accent-color);
}

.library-hero-subtitle {
    font-size: 16px;
    color: var(--lib-text-secondary);
    margin: 0;
}

/* ========================================
   TAG FILTERS
   ======================================== */

.library-filters {
    margin-bottom: 32px;
}

.library-filter-label {
    font-size: 13px;
    color: var(--lib-text-muted);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.library-tag-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.library-filter-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--lib-bg-secondary);
    border: 1px solid var(--lib-border-color);
    border-radius: 20px;
    color: var(--lib-text-secondary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.library-filter-chip:hover {
    border-color: var(--lib-accent-color);
    color: var(--lib-text-primary);
    background: var(--lib-bg-hover);
}

.library-filter-chip.active {
    background: var(--lib-accent-color);
    border-color: var(--lib-accent-color);
    color: var(--lib-bg-primary);
}

.library-filter-chip .chip-count {
    font-size: 11px;
    opacity: 0.7;
}

/* ========================================
   POSTS GRID
   ======================================== */

.library-posts-section {
    min-height: 300px;
}

.library-posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

/* ========================================
   POST CARD
   ======================================== */

.library-post-card {
    background: var(--lib-bg-secondary);
    border: 1px solid var(--lib-border-color);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    transition: all 0.2s;
}

.library-post-card:hover {
    border-color: var(--lib-accent-color);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.library-post-card.featured {
    border-color: var(--lib-warning-color);
    background: linear-gradient(135deg, var(--lib-bg-secondary) 0%, rgba(255, 193, 7, 0.05) 100%);
}

/* Card Header */
.library-post-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 12px;
}

.library-post-badges {
    display: flex;
    gap: 6px;
    flex-shrink: 0;
}

.library-badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.library-badge-lang {
    background: var(--lib-bg-primary);
    color: var(--lib-text-secondary);
    border: 1px solid var(--lib-border-color);
}

.library-badge-lang.en {
    color: #6b9fff;
    border-color: rgba(107, 159, 255, 0.3);
}

.library-badge-lang.es {
    color: #ff9f6b;
    border-color: rgba(255, 159, 107, 0.3);
}

.library-badge-featured {
    background: var(--lib-warning-color);
    color: var(--lib-bg-primary);
}

.library-badge-featured i {
    margin-right: 4px;
    font-size: 9px;
}

/* Card Title */
.library-post-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--lib-text-primary);
    margin: 0 0 10px 0;
    line-height: 1.4;
}

/* Card Snippet */
.library-post-snippet {
    font-size: 14px;
    color: var(--lib-text-secondary);
    line-height: 1.6;
    margin: 0 0 16px 0;
    flex: 1;
}

/* Card Tags */
.library-post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

.library-post-tag {
    padding: 4px 10px;
    background: var(--lib-bg-primary);
    border-radius: 12px;
    font-size: 11px;
    color: var(--lib-text-muted);
}

/* Card Footer */
.library-post-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 12px;
    border-top: 1px solid var(--lib-border-color);
}

.library-post-date {
    font-size: 12px;
    color: var(--lib-text-muted);
}

.library-post-read-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--lib-accent-color);
    color: var(--lib-bg-primary);
    border: none;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s;
}

.library-post-read-btn:hover {
    background: var(--lib-accent-hover);
    transform: scale(1.02);
}

.library-post-read-btn i {
    font-size: 11px;
}

/* ========================================
   LOADING, EMPTY, ERROR STATES
   ======================================== */

.library-loading,
.library-empty,
.library-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    text-align: center;
    color: var(--lib-text-secondary);
}

.library-loading i,
.library-empty i,
.library-error i {
    font-size: 48px;
    margin-bottom: 16px;
    color: var(--lib-text-muted);
}

.library-loading i {
    color: var(--lib-accent-color);
}

.library-error i {
    color: var(--lib-danger-color);
}

.library-empty h3,
.library-error h3 {
    margin: 0 0 8px 0;
    color: var(--lib-text-primary);
    font-size: 18px;
}

.library-empty p,
.library-error p {
    margin: 0;
    font-size: 14px;
}

/* ========================================
   FOOTER
   ======================================== */

.library-footer {
    background: var(--lib-bg-secondary);
    border-top: 1px solid var(--lib-border-color);
    padding: 24px;
    text-align: center;
}

.library-footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.library-footer p {
    margin: 0 0 8px 0;
    font-size: 13px;
    color: var(--lib-text-muted);
}

.library-footer p:last-child {
    margin-bottom: 0;
}

.library-footer a {
    color: var(--lib-accent-color);
    text-decoration: none;
}

.library-footer a:hover {
    text-decoration: underline;
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 768px) {
    .library-nav-content {
        flex-direction: column;
        gap: 12px;
    }

    .library-nav-links {
        width: 100%;
        justify-content: center;
    }

    .library-hero {
        padding: 24px 16px;
    }

    .library-hero-title {
        font-size: 24px;
    }

    .library-hero-subtitle {
        font-size: 14px;
    }

    .library-main {
        padding: 16px;
    }

    .library-posts-grid {
        grid-template-columns: 1fr;
    }

    .library-tag-filters {
        justify-content: center;
    }

    .library-filter-chip {
        padding: 6px 12px;
        font-size: 12px;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .library-posts-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1025px) {
    .library-posts-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ========================================
   ANIMATIONS
   ======================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.library-post-card {
    animation: fadeIn 0.3s ease forwards;
}

.library-post-card:nth-child(1) { animation-delay: 0.05s; }
.library-post-card:nth-child(2) { animation-delay: 0.1s; }
.library-post-card:nth-child(3) { animation-delay: 0.15s; }
.library-post-card:nth-child(4) { animation-delay: 0.2s; }
.library-post-card:nth-child(5) { animation-delay: 0.25s; }
.library-post-card:nth-child(6) { animation-delay: 0.3s; }
.library-post-card:nth-child(7) { animation-delay: 0.35s; }
.library-post-card:nth-child(8) { animation-delay: 0.4s; }
.library-post-card:nth-child(9) { animation-delay: 0.45s; }

/* ========================================
   HERO HEADER (with Add Post button)
   ======================================== */

.library-hero-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 12px;
}

.library-hero-header .library-hero-title {
    margin: 0;
}

.library-add-post-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: var(--lib-bg-secondary);
    border: 1px solid var(--lib-border-color);
    border-radius: 6px;
    color: var(--lib-text-secondary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.library-add-post-btn:hover {
    border-color: var(--lib-accent-color);
    color: var(--lib-text-primary);
    background: var(--lib-bg-hover);
}

.library-add-post-btn i {
    font-size: 12px;
}

/* ========================================
   MODAL
   ======================================== */

.library-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
}

.library-modal.open {
    opacity: 1;
    visibility: visible;
}

.library-modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
}

.library-modal-content {
    position: relative;
    background: var(--lib-bg-secondary);
    border: 1px solid var(--lib-border-color);
    border-radius: 12px;
    max-width: 560px;
    width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
    transform: translateY(20px);
    transition: transform 0.2s;
}

.library-modal.open .library-modal-content {
    transform: translateY(0);
}

.library-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--lib-border-color);
}

.library-modal-header h2 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: var(--lib-text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.library-modal-header h2 i {
    color: var(--lib-accent-color);
}

.library-modal-close {
    background: none;
    border: none;
    color: var(--lib-text-muted);
    font-size: 18px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: all 0.2s;
}

.library-modal-close:hover {
    background: var(--lib-bg-hover);
    color: var(--lib-text-primary);
}

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

.library-modal-section {
    margin-bottom: 24px;
}

.library-modal-section:last-child {
    margin-bottom: 0;
}

.library-modal-section h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--lib-text-primary);
    margin: 0 0 12px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.library-modal-section h3 i {
    color: var(--lib-warning-color);
}

.library-modal-steps {
    margin: 0;
    padding-left: 20px;
    color: var(--lib-text-secondary);
    font-size: 14px;
    line-height: 1.8;
}

.library-modal-steps li {
    margin-bottom: 4px;
}

.library-modal-steps code,
.library-modal-section p code {
    background: var(--lib-bg-primary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 12px;
    color: var(--lib-accent-color);
}

.library-modal-code {
    background: var(--lib-bg-primary);
    border: 1px solid var(--lib-border-color);
    border-radius: 8px;
    padding: 16px;
    margin: 0;
    overflow-x: auto;
}

.library-modal-code code {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 12px;
    line-height: 1.6;
    color: var(--lib-text-secondary);
    white-space: pre;
}

.library-modal-featured {
    background: rgba(255, 193, 7, 0.08);
    border: 1px solid rgba(255, 193, 7, 0.2);
    border-radius: 8px;
    padding: 16px;
}

.library-modal-featured p {
    margin: 0;
    font-size: 14px;
    color: var(--lib-text-secondary);
    line-height: 1.6;
}

.library-modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--lib-border-color);
    display: flex;
    justify-content: flex-end;
}

.library-modal-btn {
    padding: 10px 24px;
    background: var(--lib-accent-color);
    color: var(--lib-bg-primary);
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.library-modal-btn:hover {
    background: var(--lib-accent-hover);
}

/* Modal body scroll lock */
.library-page-body.modal-open {
    overflow: hidden;
}

/* ========================================
   RESPONSIVE - Modal
   ======================================== */

@media (max-width: 768px) {
    .library-hero-header {
        flex-direction: column;
        gap: 12px;
    }

    .library-modal-content {
        width: 95%;
        max-height: 90vh;
    }

    .library-modal-header,
    .library-modal-body,
    .library-modal-footer {
        padding: 16px;
    }

    .library-modal-code {
        padding: 12px;
    }

    .library-modal-code code {
        font-size: 11px;
    }
}