/* ClinProc v6 — "Scholar" design
   Semantic Scholar 的学术清爽 + Hugging Face Papers 的 Trending 信息流。
   浅色为主、暗色可选;靛蓝学术色;大留白;卡片化条目。 */

/* ---------- Design tokens ---------- */
:root {
  --font-sans: "Inter", "DM Sans", -apple-system, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  --font-serif: "Source Serif 4", "Newsreader", Georgia, "Songti SC", serif;
  --font-mono: "JetBrains Mono", ui-monospace, Consolas, monospace;

  --radius: 10px;
  --radius-sm: 6px;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, .06);
  --shadow-md: 0 4px 14px rgba(16, 24, 40, .08);
  --shadow-lg: 0 10px 30px rgba(16, 24, 40, .12);

  --accent: #3d5bd9;
  --accent-strong: #2c46b0;
  --accent-soft: #eef1fd;
  --hot: #f59e0b;
  --hot-soft: #fef3c7;
  --ok: #12915e;
  --ok-soft: #e6f4ee;
  --danger: #d64545;
}
[data-theme="light"] {
  --bg: #f7f8fa;
  --bg-elev: #ffffff;
  --bg-sunken: #eef0f4;
  --border: #e4e7ec;
  --border-strong: #cfd4dd;
  --text: #1c2430;
  --text-soft: #4d5766;
  --text-faint: #8a93a2;
  --link: #3d5bd9;
  --chip-bg: #f1f3f7;
  --code-bg: #f1f3f7;
  --glow: rgba(61, 91, 217, .08);
}
[data-theme="dark"] {
  --bg: #0e1116;
  --bg-elev: #161a22;
  --bg-sunken: #10141b;
  --border: #262c38;
  --border-strong: #39414f;
  --text: #e7eaf0;
  --text-soft: #a6adbb;
  --text-faint: #6b7382;
  --link: #8da2f5;
  --accent: #7b8ff0;
  --accent-strong: #97a8f6;
  --accent-soft: #1c2340;
  --hot: #fbbf24;
  --hot-soft: #2c230c;
  --ok: #34d399;
  --ok-soft: #0f2a20;
  --chip-bg: #1c2230;
  --code-bg: #1c2230;
  --glow: rgba(123, 143, 240, .10);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, .45);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, .55);
}

/* ---------- Base ---------- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 24px; }
a { color: var(--link); text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

/* 背景氛围层(弱化,学术风) */
.bg-layer { position: fixed; inset: 0; pointer-events: none; z-index: -1; }
.grid-bg {
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: .35;
  mask-image: linear-gradient(#000 0%, transparent 460px);
  -webkit-mask-image: linear-gradient(#000 0%, transparent 460px);
}
.glow-bg { border-radius: 50%; filter: blur(90px); }
.glow-bg-1 {
  width: 640px; height: 380px; top: -160px; left: 50%;
  transform: translateX(-70%); background: var(--glow);
}
.glow-bg-2 {
  width: 480px; height: 320px; top: 60px; right: -180px;
  background: var(--glow);
}

/* ---------- Topbar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); }
.brand-mark {
  width: 32px; height: 32px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  display: grid; place-items: center; color: #fff;
  font-weight: 700; font-size: 13px; letter-spacing: .5px;
  box-shadow: var(--shadow-sm);
}
.brand-text { font-weight: 700; font-size: 17px; letter-spacing: -.2px; }
.brand-text small {
  display: block; font-size: 11px; font-weight: 500;
  color: var(--text-faint); letter-spacing: 0; line-height: 1.2;
}
.topnav { display: flex; align-items: center; gap: 6px; }
.nav-link {
  padding: 7px 12px; border-radius: 8px; font-size: 14px;
  color: var(--text-soft); font-weight: 500; transition: .15s;
}
.nav-link:hover { background: var(--chip-bg); color: var(--text); }
.nav-link.active { color: var(--accent); background: var(--accent-soft); }
.theme-toggle {
  width: 36px; height: 36px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg-elev); color: var(--text-soft);
  display: grid; place-items: center; transition: .15s;
}
.theme-toggle:hover { color: var(--text); border-color: var(--border-strong); }
[data-theme="light"] .icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }

/* ---------- Hero ---------- */
.hero { padding: 64px 0 36px; text-align: center; }
.hero-inner { max-width: 760px; margin: 0 auto; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 600; letter-spacing: 1.6px;
  color: var(--accent); background: var(--accent-soft);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 20px;
}
.tag-dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
  animation: pulse 2.2s infinite;
}
@keyframes pulse { 50% { opacity: .35; } }
.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(34px, 5vw, 52px);
  font-weight: 600; line-height: 1.15; letter-spacing: -.5px;
}
.hero-accent {
  background: linear-gradient(120deg, var(--accent), var(--hot));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub {
  margin: 16px auto 0; max-width: 620px;
  color: var(--text-soft); font-size: 16px;
}

/* ---------- Search (S2 风格大搜索框) ---------- */
.search-box {
  margin: 28px auto 0; max-width: 680px;
  display: flex; align-items: center; gap: 10px;
  background: var(--bg-elev); border: 1.5px solid var(--border);
  border-radius: 14px; padding: 6px 8px 6px 16px;
  box-shadow: var(--shadow-md); transition: .18s;
}
.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft), var(--shadow-md);
}
.search-prompt { display: none; }
.search-icon { color: var(--text-faint); flex: none; }
.search-box input {
  flex: 1; border: 0; outline: 0; background: transparent;
  font-size: 16px; color: var(--text); padding: 10px 0;
  font-family: inherit; min-width: 0;
}
.search-box input::placeholder { color: var(--text-faint); }
.search-kbd {
  font-family: var(--font-mono); font-size: 12px; color: var(--text-faint);
  border: 1px solid var(--border); border-radius: 6px; padding: 2px 8px;
  background: var(--chip-bg);
}
.search-clear {
  border: 0; background: var(--chip-bg); color: var(--text-soft);
  width: 28px; height: 28px; border-radius: 50%; font-size: 16px; line-height: 1;
}
.search-clear:hover { background: var(--border); }
.search-btn {
  border: 0; background: var(--accent); color: #fff;
  font-weight: 600; font-size: 14px; font-family: inherit;
  padding: 9px 18px; border-radius: 10px; transition: .15s; flex: none;
}
.search-btn:hover { background: var(--accent-strong); }
.search-btn-icon { padding: 8px 11px; border-radius: 8px; display: grid; place-items: center; }
.search-hint { margin-top: 10px; font-size: 12.5px; color: var(--text-faint); }
.search-box-compact {
  margin: 20px 0 14px; max-width: none;
  padding: 4px 6px 4px 14px; border-radius: 10px;
  box-shadow: var(--shadow-sm); border-width: 1px;
}
.search-box-compact input { font-size: 14px; padding: 7px 0; }
.search-box-compact .search-kbd { display: none; }

/* ---------- Stats ---------- */
.stat-strip {
  display: flex; justify-content: center; align-items: stretch;
  gap: 0; margin-top: 30px; flex-wrap: wrap;
}
.stat-item {
  padding: 4px 26px; display: flex; flex-direction: column; align-items: center;
}
.stat-item b { font-size: 22px; font-weight: 700; letter-spacing: -.3px; }
.stat-item span { font-size: 12px; color: var(--text-faint); }
.stat-sep { width: 1px; background: var(--border); margin: 6px 0; }

/* ---------- Trending(HF Papers 风格信息流) ---------- */
.trending { padding: 26px 0 8px; }
.trending-head {
  display: flex; align-items: baseline; gap: 12px; margin-bottom: 14px;
}
.trending-title {
  font-size: 18px; font-weight: 700; display: flex; align-items: center; gap: 8px;
}
.trending-title svg { color: var(--hot); }
.trending-sub { font-size: 13px; color: var(--text-faint); }
.trending-list {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px;
}
.trend-card {
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px 18px;
  display: flex; flex-direction: column; gap: 8px;
  transition: .16s; color: var(--text); position: relative; overflow: hidden;
}
.trend-card::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--tint-edge, linear-gradient(var(--accent), var(--hot)));
  opacity: 0; transition: .16s;
}
.trend-card:hover {
  border-color: var(--accent); box-shadow: var(--shadow-md); transform: translateY(-2px);
}
.trend-card:hover::before { opacity: 1; }
.trend-rank {
  position: absolute; right: 12px; top: 10px;
  font-family: var(--font-mono); font-size: 22px; font-weight: 700;
  color: var(--text-faint); opacity: .35;
}
.trend-conf {
  align-self: flex-start; font-size: 11px; font-weight: 600;
  color: var(--accent); background: var(--accent-soft);
  padding: 3px 9px; border-radius: 999px; letter-spacing: .3px;
}
.trend-title {
  font-size: 14.5px; font-weight: 600; line-height: 1.45;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical;
  overflow: hidden;
}
.trend-meta {
  margin-top: auto; font-size: 12px; color: var(--text-faint);
  display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
}
.trend-new {
  font-size: 10px; font-weight: 700; color: var(--hot);
  background: var(--hot-soft); padding: 1px 7px; border-radius: 999px;
  letter-spacing: .8px;
}

/* ---------- Layout: filters + results ---------- */
.layout {
  display: grid; grid-template-columns: 248px 1fr; gap: 28px;
  padding-top: 30px; padding-bottom: 48px; align-items: start;
}
.filter-toggle { display: none; }

/* 筛选面板 */
.filters {
  position: sticky; top: 76px;
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow-sm);
  max-height: calc(100vh - 96px); overflow-y: auto;
}
.filter-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 10px;
}
.filter-title { font-weight: 700; font-size: 14px; }
.filter-count {
  display: inline-grid; place-items: center; min-width: 18px; height: 18px;
  margin-left: 6px; padding: 0 5px; border-radius: 999px;
  background: var(--accent); color: #fff; font-size: 11px; font-weight: 700;
  visibility: hidden;
}
.filter-count.visible { visibility: visible; }
.btn-reset {
  border: 0; background: transparent; color: var(--link);
  font-size: 12.5px; font-weight: 500; padding: 4px 6px; border-radius: 6px;
}
.btn-reset:hover { background: var(--accent-soft); }
.filter-group { border-top: 1px solid var(--border); padding: 8px 0 4px; }
.filter-group:first-of-type { border-top: 0; }
.filter-label {
  width: 100%; display: flex; align-items: center; gap: 6px;
  background: transparent; border: 0; color: var(--text);
  font-size: 13px; font-weight: 600; padding: 7px 4px; border-radius: 6px;
}
.filter-label:hover { background: var(--chip-bg); }
.filter-label svg { margin-left: auto; color: var(--text-faint); transition: .18s; }
.filter-group.collapsed .filter-label svg { transform: rotate(-90deg); }
.filter-group.collapsed .chip-list { display: none; }
.filter-active-count {
  display: inline-grid; place-items: center; min-width: 17px; height: 17px;
  padding: 0 4px; border-radius: 999px; background: var(--accent);
  color: #fff; font-size: 10.5px; font-weight: 700;
}
.filter-constrained .filter-label { color: var(--text-faint); }
.chip-list { display: flex; flex-wrap: wrap; gap: 6px; padding: 4px 2px 10px; }
.chip-list-scroll { max-height: 190px; overflow-y: auto; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12.5px; padding: 4px 10px; border-radius: 999px;
  background: var(--chip-bg); color: var(--text-soft);
  border: 1px solid transparent; cursor: pointer; transition: .13s;
  user-select: none;
}
.chip:hover { border-color: var(--border-strong); color: var(--text); }
.chip.active {
  background: var(--accent-soft); border-color: var(--accent);
  color: var(--accent-strong); font-weight: 600;
}
.chip-count {
  font-size: 10.5px; color: var(--text-faint);
  font-family: var(--font-mono);
}
.chip.active .chip-count { color: var(--accent); }
.filter-active-bar { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.filter-tag {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 12px; padding: 3px 9px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent-strong);
  cursor: pointer; border: 1px solid var(--accent);
}
.filter-tag-cat { opacity: .65; }

/* ---------- Results ---------- */
.results { min-width: 0; }
.results-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; margin-bottom: 14px; flex-wrap: wrap;
}
.results-count { font-size: 14px; color: var(--text-soft); }
.results-count b { color: var(--text); font-size: 16px; }
.results-sort { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-faint); }
.results-sort select {
  font-family: inherit; font-size: 13px; color: var(--text);
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: 8px; padding: 6px 10px; outline: none;
}
.results-list { display: flex; flex-direction: column; gap: 10px; }

/* S2 风格论文条目 */
.paper-card {
  display: block; background: var(--tint-bg, var(--bg-elev));
  border: 1px solid var(--border);
  border-left: 3px solid var(--tint-edge, var(--accent));
  border-radius: var(--radius);
  padding: 16px 20px; color: var(--text);
  transition: .15s; animation: fadeUp .3s both;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
}
.paper-card:hover {
  border-color: var(--accent); box-shadow: var(--shadow-md);
}
.paper-title {
  font-size: 16.5px; font-weight: 650; line-height: 1.4;
  color: var(--text); letter-spacing: -.1px;
}
.paper-card:hover .paper-title { color: var(--link); }
.paper-authors {
  margin-top: 5px; font-size: 13px; color: var(--text-soft);
  display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical;
  overflow: hidden;
}
.paper-tldr {
  margin-top: 8px; font-size: 13px; color: var(--text-soft);
  background: var(--bg-sunken); border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 8px 12px; line-height: 1.55;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}
.paper-tldr b { color: var(--accent); font-weight: 700; font-size: 11px; letter-spacing: .8px; margin-right: 6px; }
.paper-meta {
  margin-top: 10px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.badge {
  font-size: 11.5px; font-weight: 600; padding: 3px 10px; border-radius: 999px;
  letter-spacing: .2px;
}
.badge-conf { background: var(--accent-soft); color: var(--accent-strong); }
.badge-section { background: var(--chip-bg); color: var(--text-soft); }
.badge-year {
  background: transparent; color: var(--text-faint);
  border: 1px solid var(--border); font-family: var(--font-mono); font-size: 11px;
}
.paper-code {
  font-family: var(--font-mono); font-size: 11px; color: var(--text-faint);
  background: var(--code-bg); padding: 2px 8px; border-radius: 5px;
}
.paper-pdf {
  margin-left: auto; display: inline-flex; align-items: center; gap: 5px;
  font-size: 12px; font-weight: 600; color: var(--ok);
  background: var(--ok-soft); padding: 4px 11px; border-radius: 999px;
}
.paper-pdf svg { width: 13px; height: 13px; }
.paper-pdf.nopdf { color: var(--text-faint); background: var(--chip-bg); }

/* 空状态 / 骨架 */
.empty-state {
  text-align: center; color: var(--text-faint); padding: 60px 0; font-size: 14px;
}
.empty-icon { font-size: 34px; margin-bottom: 10px; }
.skeleton-card {
  height: 96px; border-radius: var(--radius);
  background: linear-gradient(90deg, var(--bg-elev) 25%, var(--chip-bg) 50%, var(--bg-elev) 75%);
  background-size: 200% 100%; border: 1px solid var(--border);
  animation: shimmer 1.3s infinite;
}
@keyframes shimmer { to { background-position: -200% 0; } }

/* 分页 */
.pager { display: flex; justify-content: center; gap: 6px; margin-top: 26px; flex-wrap: wrap; }
.pager button {
  min-width: 34px; height: 34px; padding: 0 8px;
  border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg-elev); color: var(--text-soft);
  font-size: 13px; font-weight: 500; transition: .13s;
}
.pager button:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.pager button.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.pager button:disabled { opacity: .45; cursor: default; }

/* ---------- Conferences ---------- */
.conf-section, .about-section { padding: 40px 0 52px; }
.section-marker {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 2.5px;
  color: var(--text-faint); display: flex; align-items: center; gap: 10px;
}
.marker-num {
  color: var(--accent); font-weight: 700;
}
.section-title {
  font-family: var(--font-serif); font-size: 30px; font-weight: 600;
  margin: 10px 0 8px; letter-spacing: -.3px;
}
.section-desc { color: var(--text-faint); font-size: 14px; margin-bottom: 24px; }
.conf-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 14px;
}
.conf-card {
  background: var(--tint-bg, var(--bg-elev));
  border: 1px solid color-mix(in srgb, var(--tint-edge, var(--border)) 30%, var(--border));
  border-radius: var(--radius); padding: 18px; cursor: pointer;
  transition: .16s; position: relative;
}
.conf-card:hover { border-color: var(--tint-edge, var(--accent)); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.conf-card.disabled { opacity: .5; cursor: default; }
.conf-card.disabled:hover { border-color: var(--border); box-shadow: none; transform: none; }
.conf-name { font-weight: 700; font-size: 15px; padding-right: 70px; }
.conf-desc {
  margin-top: 8px; font-size: 12.5px; color: var(--text-soft); line-height: 1.55;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical;
  overflow: hidden; min-height: 3.1em;
}
.conf-region {
  font-size: 11.5px; color: var(--text-faint); margin-top: 2px;
  font-family: var(--font-mono); letter-spacing: .5px;
}
.conf-stat {
  display: flex; justify-content: space-between; margin-top: 14px;
  font-size: 12.5px; color: var(--text-faint);
}
.conf-stat b { color: var(--text); font-size: 15px; margin-right: 2px; }
.conf-status {
  position: absolute; top: 14px; right: 14px; font-size: 11px; font-weight: 600;
}
.conf-status.ready { color: var(--ok); }
.conf-status.todo { color: var(--text-faint); }

/* ---------- About / Footer ---------- */
.about-body { max-width: 780px; color: var(--text-soft); font-size: 14.5px; }
.about-body p { margin-bottom: 12px; }
.about-body strong { color: var(--text); }
.footer { border-top: 1px solid var(--border); padding: 26px 0; }
.footer-inner {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 13px; color: var(--text-faint); flex-wrap: wrap; gap: 10px;
}
.footer-links { display: flex; gap: 16px; }
.footer-links a { color: var(--text-faint); }
.footer-links a:hover { color: var(--link); }

/* ---------- Toast / scroll-top ---------- */
.toast {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%);
  background: var(--text); color: var(--bg); font-size: 13px;
  padding: 10px 18px; border-radius: 999px; box-shadow: var(--shadow-lg);
  z-index: 99; animation: fadeUp .2s both;
}
.scroll-top {
  position: fixed; right: 26px; bottom: 26px; width: 42px; height: 42px;
  border-radius: 50%; border: 1px solid var(--border);
  background: var(--bg-elev); color: var(--text-soft);
  display: grid; place-items: center; box-shadow: var(--shadow-md);
  opacity: 0; pointer-events: none; transition: .2s; z-index: 60;
}
.scroll-top.visible { opacity: 1; pointer-events: auto; }
.scroll-top:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .layout { grid-template-columns: 1fr; }
  .filters {
    position: static; max-height: none; display: none;
  }
  .filters.open { display: block; }
  .filter-toggle {
    display: flex; align-items: center; gap: 8px;
    background: var(--bg-elev); border: 1px solid var(--border);
    border-radius: 10px; padding: 10px 16px; font-size: 14px; font-weight: 600;
    color: var(--text); margin-bottom: 14px; width: 100%;
    justify-content: center;
  }
  .filter-toggle .filter-count { margin-left: 2px; }
  .filter-toggle.open .filter-toggle-icon { transform: rotate(180deg); }
  .trending-list { grid-template-columns: 1fr; }
  .stat-item { padding: 4px 16px; }
}
@media (min-width: 961px) {
  .filter-toggle { display: none; }
}
@media (max-width: 620px) {
  .hero { padding: 44px 0 26px; }
  .search-kbd { display: none; }
  .brand-text small { display: none; }
  .paper-pdf { margin-left: 0; }
  .topbar-inner { height: 54px; }
}

/* ---------- v7: conference tab strip (HF-style secondary nav) ---------- */
.conf-tabs-bar {
  position: sticky; top: 60px; z-index: 40;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.conf-tabs-wrap { overflow-x: auto; scrollbar-width: none; }
.conf-tabs-wrap::-webkit-scrollbar { display: none; }
.conf-tabs { display: flex; gap: 4px; padding: 9px 0; min-width: max-content; }
.conf-tab {
  border: 0; background: transparent; font-family: inherit;
  color: var(--text-soft); font-size: 13.5px; font-weight: 600;
  padding: 7px 13px; border-radius: 8px; white-space: nowrap;
  display: inline-flex; align-items: center; gap: 7px; transition: .13s;
}
.conf-tab:hover { background: var(--chip-bg); color: var(--text); }
.conf-tab.active {
  color: var(--tint-edge, var(--accent));
  background: var(--tint-bg, var(--accent-soft));
  box-shadow: inset 0 -2px 0 var(--tint-edge, var(--accent));
}
.conf-tab.active .chip-count { color: var(--tint-edge, var(--accent)); }
@media (max-width: 620px) { .conf-tabs-bar { top: 54px; } }

/* ---------- v7: pastel card tints (eye-friendly) ---------- */
.tint-0 { --tint-bg: #eef2ff; --tint-edge: #5b6ee0; }
.tint-1 { --tint-bg: #e9f7ef; --tint-edge: #2f9e6e; }
.tint-2 { --tint-bg: #fdf1e7; --tint-edge: #d97b3f; }
.tint-3 { --tint-bg: #faeef7; --tint-edge: #b95d97; }
.tint-4 { --tint-bg: #e8f6f6; --tint-edge: #2f9e9e; }
.tint-5 { --tint-bg: #fbf7e4; --tint-edge: #a8901f; }
.tint-6 { --tint-bg: #f2eefc; --tint-edge: #8460d0; }
.tint-7 { --tint-bg: #eaf4fd; --tint-edge: #3f8ed6; }
[data-theme="dark"] .tint-0 { --tint-bg: #171c2e; --tint-edge: #7b8ff0; }
[data-theme="dark"] .tint-1 { --tint-bg: #12241c; --tint-edge: #34d399; }
[data-theme="dark"] .tint-2 { --tint-bg: #291a10; --tint-edge: #fb923c; }
[data-theme="dark"] .tint-3 { --tint-bg: #271522; --tint-edge: #e879b9; }
[data-theme="dark"] .tint-4 { --tint-bg: #102424; --tint-edge: #2dd4bf; }
[data-theme="dark"] .tint-5 { --tint-bg: #24200e; --tint-edge: #d4b83a; }
[data-theme="dark"] .tint-6 { --tint-bg: #1f1830; --tint-edge: #a78bfa; }
[data-theme="dark"] .tint-7 { --tint-bg: #101f2c; --tint-edge: #60a5fa; }

/* ---------- v7: Resources view ---------- */
.resources-hero { padding: 48px 0 10px; text-align: center; }
.resources-title {
  font-family: var(--font-serif);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 600; letter-spacing: -.5px; margin-top: 18px;
}
.resources-sub {
  margin: 12px auto 0; max-width: 640px;
  color: var(--text-soft); font-size: 15px;
}
.res-search { margin: 22px auto 0; max-width: 560px; }
.res-chips {
  justify-content: center; margin: 14px auto 0;
  max-width: 780px;
}
.resources-main { padding: 26px 24px 8px; }
.res-section { margin-bottom: 30px; }
.res-section-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 12px; }
.res-section-title { font-size: 17px; font-weight: 700; }
.res-section-count {
  font-size: 12px; color: var(--text-faint); background: var(--chip-bg);
  border-radius: 999px; padding: 1px 9px;
}
.res-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
}
.res-card {
  background: var(--tint-bg, var(--bg-elev));
  border: 1px solid var(--border);
  border-left: 3px solid var(--tint-edge, var(--accent));
  border-radius: var(--radius); padding: 15px 17px;
  display: flex; flex-direction: column; gap: 8px;
  color: var(--text); transition: .16s;
}
.res-card:hover {
  border-color: var(--accent); box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.res-name {
  font-weight: 700; font-size: 15px;
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
}
.res-ext { color: var(--text-faint); flex: none; }
.res-card:hover .res-ext { color: var(--accent); }
.res-desc { font-size: 13px; color: var(--text-soft); line-height: 1.55; flex: 1; }
.res-tags { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.res-tag {
  font-size: 11px; font-weight: 600; color: var(--text-soft);
  background: var(--chip-bg); border-radius: 999px; padding: 2px 9px;
}
.res-lang {
  font-family: var(--font-mono); font-size: 10px; color: var(--text-faint);
  border: 1px solid var(--border); border-radius: 4px; padding: 0 5px;
  margin-left: auto;
}
.resources-foot {
  padding: 4px 24px 60px; text-align: center;
  font-size: 13.5px; color: var(--text-faint);
}

/* ---------- v8: Favorites module (appended — no existing rules modified) ---------- */
/* star button on browse result cards */
.paper-card { position: relative; padding-right: 46px; }
.fav-btn {
  position: absolute; top: 13px; right: 12px; z-index: 2;
  width: 30px; height: 30px; border-radius: 8px;
  display: grid; place-items: center;
  color: var(--text-faint); cursor: pointer;
  border: 1px solid transparent; transition: .15s;
}
.fav-btn:hover { color: var(--hot); background: var(--hot-soft); border-color: var(--hot); }
.fav-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.fav-btn svg {
  width: 17px; height: 17px;
  fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linejoin: round;
}
.fav-btn.active { color: var(--hot); }
.fav-btn.active svg { fill: currentColor; }

/* nav badge */
.fav-nav-count {
  display: inline-grid; place-items: center; min-width: 17px; height: 17px;
  margin-left: 6px; padding: 0 5px; border-radius: 999px;
  background: var(--hot); color: #fff; font-size: 10.5px; font-weight: 700;
  vertical-align: 1px;
}
.fav-nav-count[hidden] { display: none; }

/* favorites view */
.fav-stats { margin-top: 14px; font-size: 12.5px; color: var(--text-faint); }
.fav-list { display: grid; gap: 12px; }
.fav-card {
  background: var(--bg-elev);
  border: 1px solid var(--border); border-left: 3px solid var(--hot);
  border-radius: var(--radius); padding: 14px 16px;
  display: flex; flex-direction: column; gap: 8px;
}
.fav-card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.fav-title {
  font-size: 15.5px; font-weight: 650; color: var(--text); line-height: 1.4;
}
.fav-title:hover { color: var(--link); }
.fav-star {
  flex: none; width: 28px; height: 28px; border-radius: 7px;
  display: grid; place-items: center; cursor: pointer;
  color: var(--text-faint); transition: .15s;
}
.fav-star:hover { color: var(--danger); background: transparent; }
.fav-star svg {
  width: 16px; height: 16px;
  fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linejoin: round;
}
.fav-star.active { color: var(--hot); }
.fav-star.active svg { fill: currentColor; }
.fav-authors { font-size: 12.5px; color: var(--text-soft); }
.fav-note {
  font-size: 13px; color: var(--text-soft); background: var(--hot-soft);
  border-left: 3px solid var(--hot); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 7px 11px; line-height: 1.5; white-space: pre-wrap;
}
.fav-note b { color: var(--hot); font-weight: 700; font-size: 11px; letter-spacing: .8px; margin-right: 6px; }
.fav-meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.fav-date {
  margin-left: auto; color: var(--text-faint);
  font-family: var(--font-mono); font-size: 10.5px;
}
.fav-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 2px; }
.fav-cat {
  font-family: inherit; font-size: 12px; font-weight: 500; color: var(--text-soft);
  background: var(--chip-bg); border: 1px solid var(--border); border-radius: 6px;
  padding: 4px 8px; cursor: pointer; max-width: 200px;
}
.fav-cat:hover { border-color: var(--border-strong); }
.fav-cat:focus-visible { outline: 2px solid var(--accent); outline-offset: -1px; }
.fav-act {
  font-size: 12px; font-weight: 600; color: var(--text-soft);
  background: var(--chip-bg); border: 1px solid var(--border); border-radius: 999px;
  padding: 4px 12px; transition: .15s;
}
.fav-act:hover { color: var(--accent-strong); border-color: var(--accent); background: var(--accent-soft); }
.fav-act-danger:hover { color: var(--danger); border-color: var(--danger); background: transparent; }

/* favorites management panel */
.favorites-foot { margin: 6px auto 60px; }
.fav-manage {
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 20px; display: flex; flex-direction: column; gap: 14px;
}
.fav-manage-head { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
.fav-manage-title { font-weight: 700; font-size: 14px; letter-spacing: .2px; }
.fav-manage-actions { display: flex; gap: 8px; }
.fav-new-row { display: flex; gap: 8px; }
.fav-new-row input {
  flex: 1; max-width: 360px; font-family: inherit; font-size: 13px;
  background: var(--bg-sunken); color: var(--text); border: 1px solid var(--border);
  border-radius: 6px; padding: 7px 11px;
}
.fav-new-row input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.fav-cat-list { display: flex; flex-wrap: wrap; gap: 8px; }
.fav-cat-item {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--chip-bg); border: 1px solid var(--border); border-radius: 999px;
  padding: 4px 6px 4px 12px; font-size: 12.5px; color: var(--text-soft);
}
.fav-cat-item b { font-weight: 600; color: var(--text); }
.fav-cat-count { font-size: 11px; color: var(--text-faint); }
.fav-mini {
  border: none; background: transparent; color: var(--text-faint); cursor: pointer;
  font-size: 11.5px; padding: 2px 7px; border-radius: 999px; transition: .13s;
}
.fav-mini:hover { color: var(--accent-strong); background: var(--accent-soft); }
.fav-mini.danger:hover { color: var(--danger); background: transparent; }
.fav-storage-note { font-size: 12px; color: var(--text-faint); line-height: 1.55; }

/* ---------- v8: Update history (changelog timeline) ---------- */
.cl-list { max-width: 760px; position: relative; }
.cl-list::before {
  content: ""; position: absolute; left: 6px; top: 8px; bottom: 8px;
  width: 2px; background: var(--border); border-radius: 2px;
}
.cl-item { position: relative; padding: 0 0 26px 34px; }
.cl-item:last-child { padding-bottom: 4px; }
.cl-dot {
  position: absolute; left: 0; top: 5px; width: 14px; height: 14px;
  border-radius: 50%; background: var(--bg-elev);
  border: 3px solid var(--accent);
}
.cl-head { display: flex; align-items: center; gap: 10px; }
.cl-date {
  font-family: var(--font-mono); font-size: 12px; color: var(--text-faint);
}
.cl-tag {
  font-size: 10.5px; font-weight: 700; letter-spacing: .5px;
  padding: 2px 9px; border-radius: 999px;
  background: var(--chip-bg); color: var(--text-soft);
}
.cl-tag-feature { background: var(--accent-soft); color: var(--accent-strong); }
.cl-tag-data { background: var(--ok-soft); color: var(--ok); }
.cl-tag-fix { background: var(--hot-soft); color: var(--hot); }
.cl-title { font-size: 15.5px; font-weight: 650; margin-top: 4px; }
.cl-notes { margin: 8px 0 0 18px; }
.cl-notes li { font-size: 13.5px; color: var(--text-soft); line-height: 1.6; margin-bottom: 4px; }

/* responsive tweaks for the wider nav */
@media (max-width: 1020px) {
  .topnav { gap: 2px; }
  .nav-link { padding: 7px 9px; font-size: 13px; }
}
@media (max-width: 760px) {
  .nav-link[data-scroll="conferences"], .nav-link[data-scroll="about"] { display: none; }
}
@media (max-width: 620px) {
  .paper-card { padding-right: 38px; }
  .fav-btn { top: 10px; right: 8px; width: 26px; height: 26px; }
  .fav-btn svg { width: 15px; height: 15px; }
  .fav-new-row input { max-width: none; }
}