/* ============================================================
   YAYINLAR — Research Archive (yp-*)
   Institutional catalog, not news-grid layout
   ============================================================ */

.yp-archive {
    --yp-ink: #0a1628;
    --yp-muted: #5c6578;
    --yp-line: #e2e6ed;
    --yp-surface: #f7f8fa;
    --yp-accent: #0088cb;
    --yp-accent-dark: #006699;
    padding-bottom: 80px;
}

/* Masthead */
.yp-masthead {
    background: var(--yp-ink);
    color: #fff;
    padding: 48px 0 42px;
    margin-bottom: 0;
}

.yp-masthead-inner {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 24px;
}

.yp-masthead-label {
    display: block;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.55);
    margin-bottom: 10px;
    font-family: 'SpartanSemiBold', sans-serif;
}

.yp-masthead h1 {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 700;
    line-height: 1.15;
    margin: 0 0 12px;
    font-family: 'SpartanBold', sans-serif;
    color: #fff;
}

.yp-masthead-desc {
    font-size: 15px;
    line-height: 1.65;
    color: rgba(255, 255, 255, 0.72);
    max-width: 560px;
    margin: 0;
}

.yp-masthead-stat {
    text-align: right;
    flex-shrink: 0;
}

.yp-masthead-stat strong {
    display: block;
    font-size: 36px;
    font-weight: 700;
    line-height: 1;
    font-family: 'SpartanBold', sans-serif;
    color: #fff;
}

.yp-masthead-stat span {
    font-size: 12px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.5);
}

/* Category filter bar */
.yp-filter-bar {
    background: #fff;
    border-bottom: 1px solid var(--yp-line);
    position: sticky;
    top: 0;
    z-index: 20;
}

.yp-filter-scroll {
    display: flex;
    gap: 8px;
    padding: 14px 0;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.yp-filter-scroll::-webkit-scrollbar {
    display: none;
}

.yp-filter-link {
    flex-shrink: 0;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 600;
    font-family: 'SpartanSemiBold', sans-serif;
    color: var(--yp-muted);
    text-decoration: none;
    border: 1px solid var(--yp-line);
    border-radius: 4px;
    background: #fff;
    transition: color 0.2s, border-color 0.2s, background 0.2s;
    white-space: nowrap;
}

.yp-filter-link:hover {
    color: var(--yp-accent);
    border-color: var(--yp-accent);
}

.yp-filter-link.is-active {
    background: var(--yp-ink);
    border-color: var(--yp-ink);
    color: #fff;
}

/* Layout */
.yp-body {
    padding-top: 40px;
}

.yp-layout {
    display: grid;
    grid-template-columns: 1fr 260px;
    gap: 48px;
    align-items: start;
}

@media (max-width: 991px) {
    .yp-layout {
        grid-template-columns: 1fr;
        gap: 36px;
    }
}

/* Catalog list */
.yp-catalog {
    list-style: none;
    margin: 0;
    padding: 0;
}

.yp-catalog-item {
    border-bottom: 1px solid var(--yp-line);
    transition: background 0.2s;
}

.yp-catalog-item:first-child {
    border-top: 1px solid var(--yp-line);
}

.yp-catalog-item:hover {
    background: var(--yp-surface);
}

.yp-catalog-link {
    display: grid;
    grid-template-columns: 72px 1fr auto;
    gap: 24px;
    align-items: center;
    padding: 28px 8px 28px 0;
    text-decoration: none;
    color: inherit;
}

@media (max-width: 767px) {
    .yp-catalog-link {
        grid-template-columns: 56px 1fr;
        gap: 16px;
        padding: 20px 0;
    }

    .yp-catalog-actions {
        grid-column: 1 / -1;
        padding-left: 72px;
    }
}

.yp-catalog-thumb {
    width: 72px;
    height: 96px;
    border-radius: 2px;
    overflow: hidden;
    background: #e8ecf1;
    border: 1px solid var(--yp-line);
    flex-shrink: 0;
}

.yp-catalog-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.yp-catalog-body {
    min-width: 0;
}

.yp-catalog-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 16px;
    margin-bottom: 8px;
    font-size: 12px;
    color: var(--yp-muted);
    font-family: 'SpartanSemiBold', sans-serif;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.yp-catalog-meta .yp-cat {
    color: var(--yp-accent);
}

.yp-catalog-title {
    font-size: 20px;
    font-weight: 700;
    line-height: 1.35;
    margin: 0 0 8px;
    font-family: 'SpartanBold', sans-serif;
    color: var(--yp-ink);
    transition: color 0.2s;
}

.yp-catalog-item:hover .yp-catalog-title {
    color: var(--yp-accent);
}

.yp-catalog-excerpt {
    font-size: 14px;
    line-height: 1.6;
    color: var(--yp-muted);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.yp-catalog-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: flex-end;
}

.yp-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 14px;
    font-size: 12px;
    font-weight: 600;
    font-family: 'SpartanSemiBold', sans-serif;
    text-decoration: none;
    border-radius: 3px;
    border: 1px solid transparent;
    transition: all 0.2s;
    white-space: nowrap;
}

.yp-btn-ghost {
    color: var(--yp-ink);
    border-color: var(--yp-line);
    background: #fff;
}

.yp-btn-ghost:hover {
    border-color: var(--yp-ink);
    color: var(--yp-ink);
}

.yp-btn-pdf {
    color: #fff;
    background: var(--yp-accent, #0088cb);
    border-color: var(--yp-accent, #0088cb);
}

.yp-btn-pdf:hover {
    background: var(--yp-accent-dark, #006699);
    border-color: var(--yp-accent-dark, #006699);
    color: #fff;
}

/* Sidebar index */
.yp-index {
    position: sticky;
    top: 72px;
}

.yp-index-title {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--yp-muted);
    margin: 0 0 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--yp-ink);
    font-family: 'SpartanBold', sans-serif;
}

.yp-index-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.yp-index-list li {
    border-bottom: 1px solid var(--yp-line);
}

.yp-index-list a {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 12px;
    padding: 11px 0;
    font-size: 14px;
    color: var(--yp-ink);
    text-decoration: none;
    font-family: 'SpartanMedium', sans-serif;
    transition: color 0.2s;
}

.yp-index-list a:hover,
.yp-index-list a.is-active {
    color: var(--yp-accent);
}

.yp-index-count {
    font-size: 12px;
    color: var(--yp-muted);
    font-family: 'SpartanRegular', sans-serif;
}

/* Pagination */
.yp-pagination {
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--yp-line);
}

.yp-pagination .pagination {
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px;
    margin: 0;
}

.yp-pagination .page-link {
    border-radius: 3px;
    font-size: 13px;
    font-family: 'SpartanMedium', sans-serif;
    color: var(--yp-ink);
    border-color: var(--yp-line);
    padding: 8px 14px;
}

.yp-pagination .page-item.active .page-link {
    background: var(--yp-ink);
    border-color: var(--yp-ink);
}

.yp-pagination .page-link:hover {
    background: var(--yp-accent);
    border-color: var(--yp-accent);
    color: #fff;
}

/* Empty */
.yp-empty {
    text-align: center;
    padding: 64px 24px;
    border: 1px dashed var(--yp-line);
    background: var(--yp-surface);
}

.yp-empty h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--yp-ink);
    margin: 0 0 8px;
    font-family: 'SpartanBold', sans-serif;
}

.yp-empty p {
    font-size: 14px;
    color: var(--yp-muted);
    margin: 0;
}

/* ─── DETAIL (document reader) ─── */
.yp-document {
    --yp-ink: #0a1628;
    --yp-muted: #5c6578;
    --yp-line: #e2e6ed;
    --yp-surface: #f7f8fa;
    --yp-accent: #0088cb;
    --yp-accent-dark: #006699;
    padding-bottom: 80px;
}

.yp-doc-header {
    padding: 40px 0 36px;
    border-bottom: 1px solid var(--yp-line);
    margin-bottom: 40px;
}

.yp-doc-cat {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--yp-accent);
    margin-bottom: 14px;
    text-decoration: none;
    font-family: 'SpartanBold', sans-serif;
}

.yp-doc-cat:hover {
    color: var(--yp-accent-dark);
}

.yp-doc-header h1 {
    font-size: clamp(26px, 3.5vw, 36px);
    font-weight: 700;
    line-height: 1.25;
    color: var(--yp-ink);
    margin: 0 0 20px;
    font-family: 'SpartanBold', sans-serif;
    max-width: 820px;
}

.yp-doc-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px 32px;
    font-size: 14px;
    color: var(--yp-muted);
}

.yp-doc-meta dt {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--yp-muted);
    margin: 0 0 4px;
    font-family: 'SpartanBold', sans-serif;
}

.yp-doc-meta dd {
    margin: 0;
    color: var(--yp-ink);
    font-family: 'SpartanSemiBold', sans-serif;
}

.yp-doc-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 28px;
}

.yp-doc-actions .yp-btn {
    padding: 12px 20px;
    font-size: 13px;
}

.yp-doc-layout {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 48px;
    align-items: start;
}

@media (max-width: 991px) {
    .yp-doc-layout {
        grid-template-columns: 1fr;
    }
}

.yp-doc-cover {
    border: 1px solid var(--yp-line);
    border-radius: 2px;
    overflow: hidden;
    background: #e8ecf1;
}

.yp-doc-cover img {
    width: 100%;
    display: block;
    aspect-ratio: 3 / 4;
    object-fit: cover;
}

.yp-doc-lead {
    font-size: 18px;
    line-height: 1.7;
    color: var(--yp-ink);
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--yp-line);
    font-family: 'SpartanMedium', sans-serif;
}

.yp-doc-content {
    font-size: 16px;
    line-height: 1.85;
    color: #2d3748;
}

.yp-doc-content p {
    margin-bottom: 1.25em;
}

/* Dark mode */
html.back-dark body .yp-archive,
html.back-dark body .yp-document {
    --yp-ink: #f0f2f5;
    --yp-muted: #9ca3af;
    --yp-line: rgba(255, 255, 255, 0.1);
    --yp-surface: #1a2235;
}

html.back-dark body .yp-filter-bar {
    background: #141b2e;
}

html.back-dark body .yp-filter-link {
    background: #1e2640;
    border-color: rgba(255, 255, 255, 0.1);
    color: #d1d5db;
}

html.back-dark body .yp-filter-link.is-active {
    background: #0088cb;
    border-color: #0088cb;
    color: #fff;
}

html.back-dark body .yp-catalog-item:hover {
    background: #1a2235;
}

html.back-dark body .yp-btn-ghost {
    background: #1e2640;
    border-color: rgba(255, 255, 255, 0.12);
    color: #e5e7eb;
}

html.back-dark body .yp-btn-pdf {
    background: #0088cb;
    border-color: #0088cb;
    color: #fff;
}

html.back-dark body .yp-btn-pdf:hover {
    background: #006699;
    border-color: #006699;
}

html.back-dark body .yp-doc-content {
    color: #d1d5db;
}