/* ─────────────────────────────────────────────────────────────────────────
   AISearchLab — Research Frontend v1.0
   Academic, formal, data-rich, optimised for AI citation.
   Design: Switzer + Inter, black/white, precise, structured.
──────────────────────────────────────────────────────────────────────────── */
@import url('https://api.fontshare.com/v2/css?f[]=switzer@300,400,500,600,700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:ital,wght@0,300;0,400;0,600;1,400&display=swap');

:root {
    --res-bg:        #ffffff;
    --res-surface:   #f8f8f6;
    --res-border:    #e0e0e0;
    --res-text:      #0a0a0a;
    --res-muted:     #666666;
    --res-faint:     #999999;
    --res-rule:      #d4d4d4;
    --res-radius:    2px;
    --res-font-disp: 'Switzer', 'Inter', sans-serif;
    --res-font-body: 'Source Serif 4', Georgia, serif;
    --res-font-ui:   'Inter', sans-serif;
    --res-font-mono: 'Courier New', Courier, monospace;
    --res-max:       740px;
    --res-wide:      1060px;
}

[data-theme='dark'] {
    --res-bg:      #080808;
    --res-surface: #111111;
    --res-border:  #222222;
    --res-text:    #f0f0f0;
    --res-muted:   #888888;
    --res-faint:   #555555;
    --res-rule:    #2a2a2a;
}

/* ── Research Archive (index page) ──────────────────────────────────────── */

.aisl-research-archive {
    width: 100%;
    padding: 72px 0 100px;
    font-family: var(--res-font-ui);
    color: var(--res-text);
}

.aisl-research-archive__inner,
.aisl-research-single__inner {
    max-width: var(--res-wide);
    margin: 0 auto;
    padding: 0 32px;
}

/* Archive eyebrow + header */
.aisl-research-eyebrow {
    font-family: var(--res-font-ui);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--res-muted);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.aisl-research-eyebrow::before {
    content: '';
    display: inline-block;
    width: 20px;
    height: 1px;
    background: var(--res-muted);
}

.aisl-research-archive__title {
    font-family: var(--res-font-disp);
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 700;
    letter-spacing: -0.035em;
    line-height: 1.05;
    color: var(--res-text);
    margin: 0 0 12px;
}

.aisl-research-archive__desc {
    font-family: var(--res-font-ui);
    font-size: 15px;
    color: var(--res-muted);
    line-height: 1.65;
    max-width: 560px;
    margin: 0 0 52px;
}

/* Archive grid: 2 columns, paper card style */
.aisl-research-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1px;
    background: var(--res-border);
    border: 1px solid var(--res-border);
    margin-bottom: 48px;
}

/* Research card */
.aisl-research-card {
    background: var(--res-bg);
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    transition: background .15s;
    position: relative;
}
.aisl-research-card:hover {
    background: var(--res-surface);
}

.aisl-research-card__meta {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--res-font-ui);
    font-size: 10px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--res-faint);
}
.aisl-research-card__topic {
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--res-text);
    background: var(--res-text);
    color: var(--res-bg);
    padding: 2px 8px;
    border-radius: 1px;
}

.aisl-research-card__title {
    font-family: var(--res-font-disp);
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.25;
    color: var(--res-text);
    margin: 0;
}
.aisl-research-card__title a {
    color: inherit;
    text-decoration: none;
}
.aisl-research-card__title a:hover { opacity: .7; }

.aisl-research-card__abstract {
    font-family: var(--res-font-ui);
    font-size: 13px;
    color: var(--res-muted);
    line-height: 1.65;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Stat highlights in card */
.aisl-research-card__stats {
    display: flex;
    gap: 20px;
    padding-top: 14px;
    border-top: 1px solid var(--res-border);
}
.aisl-research-card__stat-val {
    font-family: var(--res-font-disp);
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.04em;
    color: var(--res-text);
    line-height: 1;
    display: block;
}
.aisl-research-card__stat-desc {
    font-family: var(--res-font-ui);
    font-size: 10px;
    color: var(--res-muted);
    line-height: 1.4;
    display: block;
    margin-top: 3px;
}

.aisl-research-card__read-more {
    font-family: var(--res-font-ui);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--res-text);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 5px;
    margin-top: auto;
    padding-top: 14px;
    border-top: 1px solid var(--res-border);
}
.aisl-research-card__read-more:hover { opacity: .6; }

/* Archive empty */
.aisl-research-empty {
    grid-column: 1 / -1;
    padding: 80px 20px;
    text-align: center;
    color: var(--res-muted);
    font-size: 14px;
}

/* ── Single Research Paper ───────────────────────────────────────────────── */

.aisl-research-single {
    width: 100%;
    padding: 0 0 100px;
    font-family: var(--res-font-body);
    color: var(--res-text);
}

/* Paper header / cover */
.aisl-research-single__cover {
    border-bottom: 1px solid var(--res-border);
    padding: 60px 0 52px;
    margin-bottom: 0;
}

.aisl-research-single__journal {
    font-family: var(--res-font-ui);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--res-muted);
    margin-bottom: 22px;
    display: flex;
    align-items: center;
    gap: 12px;
}
.aisl-research-single__journal a {
    color: inherit;
    text-decoration: none;
}
.aisl-research-single__journal-sep {
    width: 1px; height: 14px; background: var(--res-border); display: inline-block;
}

.aisl-research-single__title {
    font-family: var(--res-font-disp);
    font-size: clamp(26px, 4.5vw, 46px);
    font-weight: 700;
    letter-spacing: -0.035em;
    line-height: 1.08;
    color: var(--res-text);
    max-width: 820px;
    margin: 0 0 22px;
}

/* Key stats row — prominent at top */
.aisl-research-single__stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--res-border);
    border: 1px solid var(--res-border);
    margin-bottom: 48px;
}
.aisl-research-single__stat {
    background: var(--res-bg);
    padding: 24px 28px;
}
[data-theme='dark'] .aisl-research-single__stat { background: var(--res-surface); }
.aisl-research-single__stat-val {
    font-family: var(--res-font-disp);
    font-size: 38px;
    font-weight: 700;
    letter-spacing: -0.05em;
    line-height: 1;
    color: var(--res-text);
    display: block;
    margin-bottom: 6px;
}
.aisl-research-single__stat-label {
    font-family: var(--res-font-ui);
    font-size: 12px;
    color: var(--res-muted);
    line-height: 1.45;
    display: block;
}

/* Publication bar */
.aisl-research-single__pubbar {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
    padding: 14px 0 0;
    border-top: 1px solid var(--res-border);
    font-family: var(--res-font-ui);
    font-size: 12px;
    color: var(--res-muted);
}
.aisl-research-single__pubbar-item {
    display: flex;
    align-items: center;
    gap: 5px;
}
.aisl-research-single__pubbar-label {
    font-weight: 600;
    color: var(--res-text);
}
.aisl-research-single__topics {
    display: flex; gap: 6px; flex-wrap: wrap; margin-top: 6px;
}
.aisl-research-single__topic-tag {
    font-family: var(--res-font-ui);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    border: 1px solid var(--res-border);
    padding: 3px 10px;
    border-radius: 99px;
    color: var(--res-muted);
}

/* Two-column layout: content + sidebar */
.aisl-research-single__layout {
    display: grid;
    grid-template-columns: 1fr 260px;
    gap: 60px;
    padding-top: 52px;
    align-items: start;
}

/* ── Main content (academic body) ── */
.aisl-research-single__body {
    min-width: 0;
}

/* Abstract block */
.aisl-res-abstract {
    border-left: 3px solid var(--res-text);
    padding: 20px 24px;
    background: var(--res-surface);
    margin-bottom: 40px;
}
.aisl-res-abstract h2 {
    font-family: var(--res-font-ui);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--res-muted);
    margin: 0 0 10px;
}
.aisl-res-abstract p {
    font-family: var(--res-font-body);
    font-size: 15px;
    line-height: 1.75;
    color: var(--res-text);
    margin: 0;
    font-style: italic;
}

/* Inline stat row (inside body) */
.aisl-res-stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1px;
    background: var(--res-border);
    border: 1px solid var(--res-border);
    margin: 32px 0;
}
.aisl-res-stat-block {
    background: var(--res-bg);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}
.aisl-res-stat-number {
    font-family: var(--res-font-disp);
    font-size: 30px;
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 1;
    color: var(--res-text);
}
.aisl-res-stat-label {
    font-family: var(--res-font-ui);
    font-size: 11px;
    color: var(--res-muted);
    line-height: 1.45;
}

/* Section headings */
.aisl-res-section {
    margin-bottom: 40px;
}
.aisl-res-section h2,
.aisl-research-single__body h2 {
    font-family: var(--res-font-ui);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--res-muted);
    margin: 40px 0 16px;
    padding-top: 24px;
    border-top: 1px solid var(--res-border);
}
.aisl-res-section h3,
.aisl-research-single__body h3 {
    font-family: var(--res-font-disp);
    font-size: 19px;
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.3;
    color: var(--res-text);
    margin: 28px 0 12px;
}
.aisl-res-section p,
.aisl-research-single__body p {
    font-family: var(--res-font-body);
    font-size: 16px;
    line-height: 1.8;
    color: var(--res-text);
    margin: 0 0 16px;
}
.aisl-res-section ul,
.aisl-res-section ol,
.aisl-research-single__body ul,
.aisl-research-single__body ol {
    font-family: var(--res-font-body);
    font-size: 15px;
    line-height: 1.75;
    padding-left: 22px;
    margin: 0 0 16px;
    color: var(--res-text);
}
.aisl-res-section li,
.aisl-research-single__body li { margin-bottom: 6px; }
.aisl-res-section strong,
.aisl-research-single__body strong { font-weight: 600; color: var(--res-text); }

/* Data table */
.aisl-res-table-wrap {
    overflow-x: auto;
    margin: 32px 0;
}
.aisl-res-table-wrap table,
.aisl-research-single__body table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--res-font-ui);
    font-size: 13px;
}
.aisl-res-table-wrap thead th,
.aisl-research-single__body thead th {
    text-align: left;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--res-muted);
    padding: 10px 14px;
    border-bottom: 2px solid var(--res-text);
    white-space: nowrap;
}
.aisl-res-table-wrap tbody td,
.aisl-research-single__body tbody td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--res-border);
    color: var(--res-text);
    vertical-align: top;
}
.aisl-res-table-wrap tbody tr:last-child td,
.aisl-research-single__body tbody tr:last-child td { border-bottom: none; }
.aisl-res-table-wrap tbody tr:hover td { background: var(--res-surface); }

/* Key takeaways block */
.aisl-res-takeaways {
    background: var(--res-surface);
    border: 1px solid var(--res-border);
    padding: 24px 28px;
    margin: 32px 0;
}
.aisl-res-takeaways h2 {
    border-top: none !important;
    padding-top: 0 !important;
    margin-top: 0 !important;
}
.aisl-res-takeaways ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.aisl-res-takeaways li {
    padding: 10px 0;
    border-bottom: 1px solid var(--res-border);
    font-size: 14px;
    line-height: 1.65;
    display: flex;
    gap: 10px;
    align-items: flex-start;
}
.aisl-res-takeaways li:last-child { border-bottom: none; }
.aisl-res-takeaways li::before {
    content: '→';
    flex-shrink: 0;
    color: var(--res-muted);
    font-size: 12px;
    margin-top: 3px;
}

/* Findings section */
.aisl-res-findings h3 {
    font-family: var(--res-font-disp);
    font-size: 17px;
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: 1.3;
    color: var(--res-text);
    margin: 28px 0 10px;
}

/* Source attribution */
.aisl-res-source {
    margin-top: 48px;
    padding-top: 20px;
    border-top: 1px solid var(--res-border);
    font-family: var(--res-font-ui);
    font-size: 11px;
    color: var(--res-faint);
}
.aisl-res-source a { color: var(--res-muted); }

/* ── Sidebar ── */
.aisl-research-single__sidebar {
    position: sticky;
    top: 32px;
    font-family: var(--res-font-ui);
}
.aisl-research-sidebar-box {
    border: 1px solid var(--res-border);
    padding: 20px;
    margin-bottom: 20px;
}
.aisl-research-sidebar-box h3 {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--res-muted);
    margin: 0 0 14px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--res-border);
}
.aisl-research-sidebar-box p {
    font-size: 12px;
    color: var(--res-muted);
    line-height: 1.6;
    margin: 0 0 10px;
}
.aisl-research-sidebar-box a {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--res-text);
    text-decoration: none;
    padding: 6px 0;
    border-bottom: 1px solid var(--res-border);
}
.aisl-research-sidebar-box a:hover { opacity: .6; }
.aisl-research-sidebar-box a:last-child { border-bottom: none; }

/* Related papers mini list */
.aisl-res-related-paper {
    padding: 10px 0;
    border-bottom: 1px solid var(--res-border);
}
.aisl-res-related-paper:last-child { border-bottom: none; }
.aisl-res-related-paper a {
    font-size: 12px;
    font-weight: 500;
    color: var(--res-text);
    text-decoration: none;
    line-height: 1.45;
    display: block;
    border-bottom: none !important;
    padding: 0 !important;
}
.aisl-res-related-paper a:hover { opacity: .7; }
.aisl-res-related-paper-meta {
    font-size: 10px;
    color: var(--res-faint);
    margin-top: 3px;
}

/* Research footer */
.aisl-research-single__footer {
    margin-top: 60px;
    padding-top: 32px;
    border-top: 1px solid var(--res-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--res-font-ui);
    font-size: 11px;
    color: var(--res-muted);
}
.aisl-research-single__footer a {
    color: var(--res-text);
    font-weight: 600;
    text-decoration: none;
}
.aisl-research-single__footer a:hover { opacity: .7; }

/* ── Shortcode (archive on any page) ── */
.aisl-research-shortcode {
    font-family: var(--res-font-ui);
    padding: 48px 0;
}

/* ── Responsive ── */
@media (max-width: 1000px) {
    .aisl-research-single__layout { grid-template-columns: 1fr; gap: 40px; }
    .aisl-research-single__sidebar { position: static; }
    .aisl-research-single__stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 700px) {
    .aisl-research-archive__inner,
    .aisl-research-single__inner { padding: 0 20px; }
    .aisl-research-grid { grid-template-columns: 1fr; }
    .aisl-research-single__stats { grid-template-columns: repeat(2, 1fr); }
    .aisl-research-single__title { font-size: 26px; }
    .aisl-research-single__cover { padding: 40px 0 32px; }
    .aisl-res-stats-row { grid-template-columns: repeat(2, 1fr); }
    .aisl-research-single__footer { flex-direction: column; gap: 10px; }
}