/* ========== 设计 token (来自副本) ========== */
:root {
  --world-model: #6366f1;
  --physical-ai: #10b981;
  --medical-ai:  #f43f5e;

  --bg: #050508;
  --card-bg: rgba(18, 18, 28, 0.85);
  --card-bg-hover: rgba(25, 25, 40, 0.95);
  --text: #f0f0fa;
  --text-secondary: #9090a8;
  --text-muted: #52526a;
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  --accent: #818cf8;
  --header-bg: rgba(8, 8, 15, 0.9);
  --surface-bg: rgba(255, 255, 255, 0.03);
  --surface-border: rgba(255, 255, 255, 0.06);
  --surface-hover-border: rgba(255, 255, 255, 0.12);
  --header-border: rgba(255, 255, 255, 0.08);
  --logo-gradient: linear-gradient(135deg, #fff 30%, #a78bfa);
  --glow-a: rgba(99, 102, 241, 0.2);
  --glow-b: rgba(16, 185, 129, 0.15);
  --glow-c: rgba(244, 63, 94, 0.12);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 12px 48px rgba(0, 0, 0, 0.6);
  --glass-blur: blur(20px);

  --tier-ccf-a:   #f87171;
  --tier-t1:      #c4b5fd;
  --tier-t2:      #d8b4fe;
  --tier-visual:  #6ee7b7;
  --tier-robot:   #93c5fd;
  --tier-medical: #f9a8d4;
  --tier-arxiv:   #94a3b8;
}

:root[data-theme="light"] {
  --bg: #f4f6f9;
  --card-bg: #ffffff;
  --card-bg-hover: #fafbfe;
  --text: #0f1117;
  --text-secondary: #3d3f52;
  --text-muted: #7c7f96;
  --border: #e2e5ed;
  --border-hover: #b8bdcc;
  --accent: #5b5ef6;
  --header-bg: rgba(255, 255, 255, 0.97);
  --surface-bg: rgba(0, 0, 0, 0.03);
  --surface-border: rgba(0, 0, 0, 0.07);
  --surface-hover-border: rgba(0, 0, 0, 0.13);
  --header-border: rgba(0, 0, 0, 0.07);
  --logo-gradient: linear-gradient(135deg, #1e1b4b 30%, #5b5ef6);
  --glow-a: rgba(91, 94, 246, 0.06);
  --glow-b: rgba(16, 185, 129, 0.04);
  --glow-c: rgba(244, 63, 94, 0.04);
  --shadow-card: 0 1px 4px rgba(0,0,0,.05), 0 4px 16px rgba(0,0,0,.05);
  --shadow-hover: 0 4px 12px rgba(0,0,0,.07), 0 12px 32px rgba(0,0,0,.08);
  --glass-blur: blur(16px);
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  font-family: 'Inter', 'Noto Sans SC', -apple-system, "Segoe UI", system-ui, sans-serif;
  background: var(--bg); color: var(--text);
  line-height: 1.6; min-height: 100vh;
  transition: background .3s, color .3s;
}
body::before {
  content: ''; position: fixed; inset: 0; pointer-events: none; z-index: -1;
  background:
    radial-gradient(ellipse 100% 70% at 10% -10%, var(--glow-a) 0%, transparent 50%),
    radial-gradient(ellipse 80% 60% at 90% 110%, var(--glow-b) 0%, transparent 50%),
    radial-gradient(ellipse 50% 40% at 50% 50%, var(--glow-c) 0%, transparent 60%),
    linear-gradient(180deg, transparent 0%, rgba(5,5,8,0.5) 100%);
  animation: bgPulse 20s ease-in-out infinite;
}
:root[data-theme="light"] body::before {
  background:
    radial-gradient(ellipse 100% 70% at 10% -10%, var(--glow-a) 0%, transparent 50%),
    radial-gradient(ellipse 80% 60% at 90% 110%, var(--glow-b) 0%, transparent 50%),
    radial-gradient(ellipse 50% 40% at 50% 50%, var(--glow-c) 0%, transparent 60%);
}
@keyframes bgPulse { 0%,100% { opacity: 1; } 50% { opacity: .8; } }

/* ========== 顶部 topbar ========== */
.topbar {
  display: flex; align-items: center; gap: 16px; flex-wrap: nowrap;
  padding: 12px 24px; background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: var(--glass-blur) saturate(180%);
  -webkit-backdrop-filter: var(--glass-blur) saturate(180%);
  box-shadow: 0 4px 30px rgba(0,0,0,.3);
}
:root[data-theme="light"] .topbar {
  box-shadow: 0 1px 0 var(--header-border), 0 2px 8px rgba(0,0,0,.04);
}
.brand {
  font-size: 20px; font-weight: 700; letter-spacing: -0.02em;
  background: var(--logo-gradient);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.mode-tabs { display: flex; gap: 4px; }
.mode-tab {
  padding: 6px 14px; border: 1px solid var(--surface-border); border-radius: 999px;
  background: var(--surface-bg); color: var(--text-muted); cursor: pointer;
  font-size: 14px; transition: all .18s;
}
.mode-tab:hover { color: var(--text); border-color: var(--surface-hover-border); }
.mode-tab.active {
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  color: #fff; border-color: transparent;
  box-shadow: 0 0 14px rgba(129,140,248,.4);
}
.search {
  flex: 1; max-width: 400px; padding: 8px 12px 8px 36px;
  background: var(--surface-bg); border: 1px solid var(--surface-border);
  border-radius: 8px; color: var(--text);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%239090a8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><circle cx='11' cy='11' r='8'/><line x1='21' y1='21' x2='16.65' y2='16.65'/></svg>");
  background-repeat: no-repeat; background-position: 12px center;
  transition: border-color .2s;
}
.search:focus { outline: none; border-color: var(--accent); }
.topbar-right {
  display: flex; align-items: center; gap: 8px;
  margin-left: auto; flex-shrink: 0;
}
.btn-auth {
  padding: 8px 16px; border: none; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  color: #fff; cursor: pointer; font-weight: 500;
  box-shadow: 0 0 14px rgba(129,140,248,.3);
}
.btn-about {
  width: 36px; height: 36px; border: none; border-radius: 8px;
  background: var(--surface-bg); color: var(--text-secondary);
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: all .2s ease; position: relative; overflow: hidden;
}
.btn-about svg { width: 18px; height: 18px; transition: transform .2s ease; }
.btn-about:hover {
  background: var(--card-bg);
  color: var(--text);
  box-shadow: 0 2px 12px rgba(0,0,0,.2);
}
.btn-about:hover svg { transform: scale(1.1); }
.btn-about::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(129,140,248,.1), transparent);
  opacity: 0; transition: opacity .2s;
}
.btn-about:hover::before { opacity: 1; }

/* ========== 领域栏 ========== */
.domain-bar {
  display: flex; gap: 8px; padding: 12px 24px; flex-wrap: wrap;
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
  backdrop-filter: var(--glass-blur);
}
.domain-tab {
  padding: 6px 16px; border: 1px solid transparent; border-radius: 8px;
  background: var(--surface-bg); color: var(--text-secondary); cursor: pointer;
  font-size: 14px; font-weight: 500; transition: all .18s; white-space: nowrap;
}
.domain-tab[data-domain="all"] { border-color: var(--border); }
.domain-tab[data-domain="all"].active { background: rgba(255,255,255,.07); color: var(--text); border-color: rgba(255,255,255,.18); }
:root[data-theme="light"] .domain-tab[data-domain="all"].active { background: rgba(0,0,0,.06); border-color: rgba(0,0,0,.14); }
.domain-tab[data-domain="world_model"] { background: rgba(99,102,241,.08); color: #a5b4fc; border-color: rgba(99,102,241,.2); }
:root[data-theme="light"] .domain-tab[data-domain="world_model"] { color: #4f46e5; }
.domain-tab[data-domain="world_model"].active { background: rgba(99,102,241,.17); border-color: var(--world-model); box-shadow: 0 0 14px rgba(99,102,241,.22); }
.domain-tab[data-domain="physical_ai"] { background: rgba(16,185,129,.08); color: #6ee7b7; border-color: rgba(16,185,129,.2); }
:root[data-theme="light"] .domain-tab[data-domain="physical_ai"] { color: #059669; }
.domain-tab[data-domain="physical_ai"].active { background: rgba(16,185,129,.17); border-color: var(--physical-ai); box-shadow: 0 0 14px rgba(16,185,129,.22); }
.domain-tab[data-domain="medical_ai"] { background: rgba(244,63,94,.08); color: #fda4af; border-color: rgba(244,63,94,.2); }
:root[data-theme="light"] .domain-tab[data-domain="medical_ai"] { color: #e11d48; }
.domain-tab[data-domain="medical_ai"].active { background: rgba(244,63,94,.17); border-color: var(--medical-ai); box-shadow: 0 0 14px rgba(244,63,94,.22); }

/* ========== Theme toggle ========== */
.theme-toggle {
  padding: 6px 10px; border: 1px solid var(--surface-border); border-radius: 8px;
  background: var(--surface-bg); color: var(--text-muted); cursor: pointer;
  font-size: 14px; transition: all .18s;
}
.theme-toggle:hover { color: var(--text); border-color: var(--surface-hover-border); }
.lang-toggle {
  min-width: 65px;
  text-align: center;
  font-weight: 500;
}

/* SVG sun/moon icon toggle */
.theme-toggle-icon {
  position: relative; overflow: hidden;
  width: 38px; height: 36px; padding: 0;
  display: inline-flex; align-items: center; justify-content: center;
}
.theme-toggle-icon:hover { background: var(--card-bg); transform: translateY(-1px); }
.theme-toggle-icon .theme-icon {
  position: absolute;
  transition: transform .55s cubic-bezier(.4,.0,.25,1.4), opacity .25s;
}
/* dark mode: moon visible, sun hidden upward */
.theme-toggle-icon .icon-sun  { transform: translateY(-28px) rotate(-120deg); opacity: 0; }
.theme-toggle-icon .icon-moon { transform: translateY(0)     rotate(0);       opacity: 1; }
/* light mode: sun visible, moon hidden downward */
:root[data-theme="light"] .theme-toggle-icon .icon-sun  { transform: translateY(0)    rotate(0);     opacity: 1; }
:root[data-theme="light"] .theme-toggle-icon .icon-moon { transform: translateY(28px) rotate(120deg); opacity: 0; }
.theme-toggle-icon .icon-sun  { color: #fbbf24; }
.theme-toggle-icon .icon-moon { color: #a5b4fc; }

/* ========== 三栏布局 ========== */
.layout {
  display: grid; grid-template-columns: 240px 1fr 0; gap: 20px;
  padding: 20px 24px 60px; max-width: 1600px; margin: 0 auto;
  transition: grid-template-columns .3s;
}
.layout.has-detail { grid-template-columns: 240px 1fr 440px; }

/* ========== 左 sidebar ========== */
.sidebar {
  position: sticky; top: 110px; align-self: start;
  background: var(--card-bg); padding: 16px; border-radius: 16px;
  border: 1px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.sidebar section { margin-bottom: 18px; }
.sidebar h3 {
  margin: 0 0 8px; font-size: 11px; text-transform: uppercase;
  color: var(--text-muted); letter-spacing: .08em; font-weight: 700;
}
.sidebar label {
  display: flex; align-items: center; gap: 8px;
  padding: 4px 0; font-size: 13px; color: var(--text-secondary); cursor: pointer;
}
.sidebar label:hover { color: var(--text); }
.sidebar input[type="checkbox"] { accent-color: var(--accent); }
.sidebar select {
  width: 100%; padding: 7px 10px;
  background: var(--surface-bg); border: 1px solid var(--surface-border);
  border-radius: 8px; color: var(--text); font-size: 13px;
  transition: border-color .2s;
}
.sidebar select:focus { outline: none; border-color: var(--accent); }

/* Sidebar toggle button — hidden on desktop, shown on mobile via media query */
.sidebar-toggle {
  display: none;
  width: 100%;
  padding: 12px 16px;
  margin-bottom: 12px;
  border: 1px solid var(--surface-border);
  border-radius: 10px;
  background: var(--surface-bg);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all .2s;
  justify-content: center;
  align-items: center;
  gap: 8px;
}
.sidebar-toggle:hover {
  background: var(--card-bg-hover);
  border-color: var(--surface-hover-border);
  color: var(--text);
}
.sidebar-toggle:active { transform: scale(0.98); }
.toggle-icon { font-size: 16px; }

/* ========== 仪表盘 (速览模式) ========== */
.main-col { display: flex; flex-direction: column; gap: 20px; min-width: 0; }
.dashboard { display: flex; flex-direction: column; gap: 16px; }
body.mode-curated .feed-only { display: none; }

.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.stat-card {
  position: relative; overflow: hidden;
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: 16px; padding: 1.1rem 1rem;
  text-align: center; cursor: pointer;
  transition: all .3s cubic-bezier(.4,0,.2,1);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.stat-card::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 3px;
  opacity: 0; transition: opacity .3s; border-radius: 0 0 16px 16px;
}
.stat-card[data-key="total"]::after        { background: linear-gradient(90deg, #64748b, #94a3b8, #cbd5e1); }
.stat-card[data-key="world_model"]::after  { background: linear-gradient(90deg, #6366f1, #818cf8, #a78bfa); }
.stat-card[data-key="physical_ai"]::after  { background: linear-gradient(90deg, #10b981, #34d399, #6ee7b7); }
.stat-card[data-key="medical_ai"]::after   { background: linear-gradient(90deg, #f43f5e, #fb7185, #fda4af); }
.stat-card:hover {
  transform: translateY(-3px) scale(1.02);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
}
.stat-card:hover::after { opacity: 1; }
.stat-value {
  font-size: 1.95rem; font-weight: 800; line-height: 1; letter-spacing: -.04em;
  color: var(--text);
}
.stat-value.world_model { color: #a5b4fc; text-shadow: 0 0 20px rgba(99,102,241,.4); }
.stat-value.physical_ai { color: #6ee7b7; text-shadow: 0 0 20px rgba(16,185,129,.4); }
.stat-value.medical_ai  { color: #fda4af; text-shadow: 0 0 20px rgba(244,63,94,.4); }
:root[data-theme="light"] .stat-value.world_model { color: #4f46e5; text-shadow: none; }
:root[data-theme="light"] .stat-value.physical_ai { color: #059669; text-shadow: none; }
:root[data-theme="light"] .stat-value.medical_ai  { color: #e11d48; text-shadow: none; }
.stat-label { font-size: .72rem; color: var(--text-muted); margin-top: .45rem; font-weight: 500; }
.stat-card .new-badge {
  position: absolute; top: .55rem; right: .55rem;
  background: linear-gradient(135deg, #22c55e, #16a34a);
  color: #fff; font-size: .58rem; padding: .12rem .4rem; border-radius: 8px;
  font-weight: 700; box-shadow: 0 2px 8px rgba(34,197,94,.4);
}

.charts-section { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.chart-panel {
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: 16px; overflow: hidden;
  backdrop-filter: blur(12px);
  transition: all .3s ease;
}
.chart-panel:hover { border-color: var(--border-hover); box-shadow: var(--shadow-card); }
.chart-header {
  display: flex; align-items: center; gap: .55rem;
  padding: .8rem 1.1rem;
  border-bottom: 1px solid var(--surface-border);
  background: linear-gradient(135deg, rgba(255,255,255,.02), transparent);
}
.chart-icon { font-size: 1rem; }
.chart-title { font-size: .82rem; font-weight: 700; color: var(--text); }
.chart-note { font-size: .68rem; color: var(--text-muted); margin-left: auto; }
.chart-body { padding: 1rem 1.1rem; min-height: 180px; }

/* trends bars */
.trend-legend {
  display: flex; flex-wrap: wrap; gap: .9rem;
  padding: 0 0 .7rem; margin-bottom: .6rem;
  border-bottom: 1px dashed var(--border);
  font-size: .78rem; color: var(--text-dim);
}
.trend-legend-item { display: inline-flex; align-items: center; gap: 5px; }
.trend-legend-dot { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }
.trend-legend-dot.world_model { background: linear-gradient(135deg, #6366f1, #a78bfa); }
.trend-legend-dot.physical_ai { background: linear-gradient(135deg, #10b981, #6ee7b7); }
.trend-legend-dot.medical_ai  { background: linear-gradient(135deg, #f43f5e, #fda4af); }
.trend-row { display: flex; align-items: center; gap: .7rem; margin-bottom: .55rem; }
.trend-row:last-child { margin-bottom: 0; }
.trend-year-label { width: 38px; font-size: .72rem; font-weight: 700; color: var(--text-secondary); }
.trend-bars {
  flex: 1; display: flex; height: 24px; border-radius: 8px; overflow: hidden;
  background: rgba(255,255,255,.03);
}
:root[data-theme="light"] .trend-bars { background: rgba(0,0,0,.04); }
@keyframes barGrow {
  from { transform: scaleX(0); opacity: 0; }
  to   { transform: scaleX(1); opacity: 1; }
}
.trend-bar {
  height: 100%; min-width: 2px;
  transform-origin: left center;
  animation: barGrow .55s cubic-bezier(.4,0,.2,1) both;
  transition: filter .18s ease;
}
.trend-bar:hover { filter: brightness(1.3) saturate(1.1); }
.trend-bar.world_model { background: linear-gradient(90deg, #6366f1, #818cf8, #a78bfa); }
.trend-bar.physical_ai { background: linear-gradient(90deg, #10b981, #34d399, #6ee7b7); }
.trend-bar.medical_ai  { background: linear-gradient(90deg, #f43f5e, #fb7185, #fda4af); }
.trend-bar-tip {
  position: fixed; z-index: 999; pointer-events: none;
  background: var(--card-bg); border: 1px solid var(--border-hover);
  color: var(--text); font-size: .75rem; font-weight: 600;
  padding: .3rem .65rem; border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0,0,0,.4), 0 1px 4px rgba(0,0,0,.2);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  opacity: 0; transition: opacity .1s;
  white-space: nowrap;
}
.trend-bar-tip.visible { opacity: 1; }
.trend-count { width: 50px; text-align: right; font-size: .7rem; font-weight: 700; color: var(--text-secondary); }

/* subdomain section */
.subdomain-section {
  background: var(--card-bg); border: 1px solid var(--border); border-radius: 16px;
  padding: 1rem 1.25rem;
  backdrop-filter: blur(12px);
}
.subdomain-title {
  font-size: .7rem; font-weight: 700; margin-bottom: .85rem; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .08em;
}
.subdomain-grid { display: flex; flex-wrap: wrap; gap: .42rem; align-items: flex-start; }
.subdomain-domain-header {
  width: 100%; font-size: .68rem; font-weight: 700; color: var(--text-muted);
  margin: .5rem 0 .22rem; padding-bottom: .22rem;
  border-bottom: 1px solid var(--surface-border);
  text-transform: uppercase; letter-spacing: .08em;
}
.subdomain-domain-header:first-child { margin-top: 0; }
.subdomain-domain-header.world_model { color: #a5b4fc; }
.subdomain-domain-header.physical_ai { color: #6ee7b7; }
.subdomain-domain-header.medical_ai  { color: #fda4af; }
:root[data-theme="light"] .subdomain-domain-header.world_model { color: #4f46e5; }
:root[data-theme="light"] .subdomain-domain-header.physical_ai { color: #059669; }
:root[data-theme="light"] .subdomain-domain-header.medical_ai  { color: #e11d48; }
.subdomain-item {
  display: inline-flex; align-items: center; gap: .38rem;
  padding: .36rem .68rem; border-radius: 20px;
  background: var(--surface-bg); border: 1px solid var(--surface-border);
  cursor: pointer; transition: all .17s; font-size: .77rem;
}
.subdomain-item:hover {
  background: rgba(129,140,248,.08); border-color: rgba(129,140,248,.25);
  transform: translateY(-1px);
}
.subdomain-item.active { background: rgba(99,102,241,.12); border-color: rgba(99,102,241,.35); }
.subdomain-item .name { color: var(--text-secondary); font-weight: 500; }
.subdomain-item .count { font-weight: 700; color: var(--text); }
.subdomain-item .new-badge {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 17px; height: 17px; padding: 0 4px;
  background: linear-gradient(135deg, #22c55e, #16a34a);
  color: #fff; font-size: .57rem; font-weight: 700; border-radius: 9px;
  position: static; box-shadow: none;
}

/* hot-topic domain tabs */
.hot-tabs { display: flex; gap: .3rem; margin-bottom: .7rem; }
.hot-tab {
  padding: .25rem .6rem; border-radius: 6px; font-size: .7rem;
  cursor: pointer; border: 1px solid var(--border); background: var(--surface-bg);
  color: var(--text-muted); font-weight: 400; transition: all .2s;
}
.hot-tab:hover { color: var(--text); }
.hot-tab[data-domain="world_model"].active { color: #6366f1; background: rgba(99,102,241,.1); border-color: #6366f1; font-weight: 600; }
.hot-tab[data-domain="physical_ai"].active { color: #10b981; background: rgba(16,185,129,.1); border-color: #10b981; font-weight: 600; }
.hot-tab[data-domain="medical_ai"].active  { color: #f43f5e; background: rgba(244,63,94,.1);  border-color: #f43f5e; font-weight: 600; }
.hot-bar.world_model { background: linear-gradient(90deg, #6366f1, #818cf8); }
.hot-bar.physical_ai { background: linear-gradient(90deg, #10b981, #34d399); }
.hot-bar.medical_ai  { background: linear-gradient(90deg, #f43f5e, #fb7185); }
.hot-show-all {
  margin-top: .5rem; width: 100%; padding: .3rem 0; border-radius: 6px;
  font-size: .7rem; cursor: pointer; border: 1px solid var(--border);
  background: var(--surface-bg); color: var(--text-muted); transition: all .18s;
}
.hot-show-all:hover { color: var(--text); border-color: var(--border-hover); }

/* ========== Trending View ========== */
.trending-view {
  width: 100%;
}
.hot-update-info {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  margin-bottom: 15px;
  padding: 0 10px;
}
#hot-last-updated {
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.hot-refresh-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s ease;
}
.hot-refresh-btn:hover {
  background: var(--surface-bg);
  transform: rotate(180deg);
}
.hot-refresh-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
.trending-overview {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}
.overview-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  display: flex; align-items: center; gap: 16px;
  transition: all .25s ease;
  position: relative;
  overflow: hidden;
}
.overview-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 3px;
}
.world-model-card::before { background: linear-gradient(90deg, #6366f1, #818cf8); }
.physical-ai-card::before { background: linear-gradient(90deg, #10b981, #34d399); }
.medical-ai-card::before { background: linear-gradient(90deg, #f43f5e, #fb7185); }
.overview-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
}
.overview-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}
.world-model-card .overview-icon { background: rgba(99,102,241,.1); }
.physical-ai-card .overview-icon { background: rgba(16,185,129,.1); }
.medical-ai-card .overview-icon { background: rgba(244,63,94,.1); }
.overview-content { flex: 1; }
.overview-content h3 {
  margin: 0 0 4px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}
.overview-desc {
  margin: 0 0 8px;
  font-size: .75rem;
  color: var(--text-secondary);
}
.overview-stats { display: flex; gap: 12px; }
.stat-item {
  font-size: .7rem;
  color: var(--text-muted);
}
.stat-num {
  font-weight: 600;
  color: var(--text);
}
.overview-trend {
  font-size: 1.2rem;
  font-weight: 700;
}
.overview-trend.up { color: var(--physical-ai); }

.trending-section {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 20px;
}
.section-header { margin-bottom: 16px; }
.section-header h2 {
  margin: 0 0 4px;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
}
.section-desc {
  margin: 0;
  font-size: .8rem;
  color: var(--text-secondary);
}

/* Bar Chart */
.comparison-chart { }
.chart-title {
  font-size: .9rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
  display: block;
}
.bar-chart-container { }
.bar-item {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 10px;
}
.bar-item:last-child { margin-bottom: 0; }
.bar-label {
  width: 140px;
  font-size: .75rem;
  color: var(--text-secondary);
  flex-shrink: 0;
}
.bar-wrapper {
  flex: 1;
  height: 14px;
  background: var(--surface-bg);
  border-radius: 7px;
  overflow: hidden;
}
.bar {
  height: 100%;
  border-radius: 7px;
  transition: width .5s ease;
}
.world-model-bar { background: linear-gradient(90deg, #6366f1, #818cf8); }
.physical-ai-bar { background: linear-gradient(90deg, #10b981, #34d399); }
.medical-ai-bar { background: linear-gradient(90deg, #f43f5e, #fb7185); }
.bar-value {
  width: 40px;
  font-size: .75rem;
  font-weight: 600;
  color: var(--text);
  text-align: right;
  flex-shrink: 0;
}

/* Radar Chart */
.radar-container {
  display: flex; justify-content: center;
  padding: 10px 0;
}
.radar-chart {
  position: relative;
}
.radar-chart svg {
  width: 420px;
  height: 420px;
}
.radar-polygon {
  transition: all .3s ease;
}
.radar-polygon:hover {
  opacity: 0.8;
  stroke-width: 3;
}
.radar-legend {
  display: flex; justify-content: center; gap: 16px;
  margin-top: 12px;
}
.legend-item {
  display: flex; align-items: center; gap: 6px;
  font-size: .75rem;
  color: var(--text-secondary);
}
.legend-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
}
.world-model-dot { background: #6366f1; }
.physical-ai-dot { background: #10b981; }
.medical-ai-dot { background: #f43f5e; }

/* Topics Grid */
.topics-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.topic-card {
  background: var(--surface-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  transition: all .25s ease;
}
.topic-card:hover {
  background: var(--card-bg-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}
.world-model-topic { border-left: 3px solid #6366f1; }
.physical-ai-topic { border-left: 3px solid #10b981; }
.medical-ai-topic { border-left: 3px solid #f43f5e; }
.topic-header { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.topic-icon { font-size: 1.25rem; }
.topic-title-row { flex: 1; display: flex; align-items: center; gap: 8px; }
.topic-title-row h3 {
  margin: 0;
  font-size: .9rem;
  font-weight: 600;
  color: var(--text);
}
.topic-tag {
  padding: 2px 8px;
  border-radius: 999px;
  font-size: .6rem;
  font-weight: 500;
}
.topic-tag:is(.world-model-topic *) { background: rgba(99,102,241,.15); color: #818cf8; }
.topic-tag:is(.physical-ai-topic *) { background: rgba(16,185,129,.15); color: #34d399; }
.topic-tag:is(.medical-ai-topic *) { background: rgba(244,63,94,.15); color: #fb7185; }
.topic-desc {
  margin: 0 0 12px;
  font-size: .75rem;
  color: var(--text-secondary);
  line-height: 1.5;
}
.topic-metrics {
  display: flex; gap: 12px;
  margin-bottom: 10px;
}
.metric {
  font-size: .7rem;
  color: var(--text-muted);
}
.topic-keywords {
  display: flex; flex-wrap: wrap; gap: 6px;
}
.topic-keywords span {
  padding: 3px 8px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: .65rem;
  color: var(--text-secondary);
}

/* Predictions */
.predictions-container {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.prediction-card {
  background: linear-gradient(135deg, rgba(129,140,248,.05), rgba(16,185,129,.03));
  border: 1px solid rgba(129,140,248,.2);
  border-radius: 14px;
  padding: 18px;
  display: flex; gap: 14px;
  transition: all .25s ease;
}
.prediction-card:hover {
  border-color: rgba(129,140,248,.4);
  transform: translateY(-2px);
}
.prediction-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}
.prediction-content { flex: 1; }
.prediction-content h3 {
  margin: 0 0 6px;
  font-size: .9rem;
  font-weight: 600;
  color: var(--text);
}
.prediction-content p {
  margin: 0 0 10px;
  font-size: .75rem;
  color: var(--text-secondary);
  line-height: 1.5;
}
.prediction-tag {
  padding: 3px 10px;
  background: rgba(99,102,241,.1);
  border-radius: 999px;
  font-size: .65rem;
  color: #818cf8;
}

/* trending topics */
/* 默认露出 5 条整 (~30px/条 × 5 + 顶部少许 padding),其余靠滚轮下滑 */
.hot-list-scroll {
  height: 170px !important;
  overflow-y: auto !important;
  overflow-x: hidden;
  padding-right: 8px;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) transparent;
}
.hot-list-scroll::-webkit-scrollbar { width: 8px; }
.hot-list-scroll::-webkit-scrollbar-thumb {
  background: var(--border-hover); border-radius: 4px;
}
.hot-list-scroll::-webkit-scrollbar-thumb:hover { background: var(--accent); }
.hot-list-scroll::-webkit-scrollbar-track { background: var(--surface-bg); border-radius: 4px; }
.hot-item { display: flex; align-items: center; gap: .65rem; margin-bottom: .55rem; }
.hot-item:last-child { margin-bottom: 0; }
.hot-rank {
  width: 22px; height: 22px; border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  font-size: .62rem; font-weight: 800; flex-shrink: 0;
}
.hot-rank.rank-1 { background: linear-gradient(135deg, #f59e0b, #d97706); color: #fff; }
.hot-rank.rank-2 { background: linear-gradient(135deg, #94a3b8, #64748b); color: #fff; }
.hot-rank.rank-3 { background: linear-gradient(135deg, #b45309, #92400e); color: #fff; }
.hot-rank.rank-other { background: var(--surface-bg); color: var(--text-muted); border: 1px solid var(--border); }
.hot-name { flex: 1; font-size: .79rem; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hot-bar-wrap { width: 78px; height: 7px; background: var(--surface-bg); border-radius: 4px; overflow: hidden; }
.hot-bar { height: 100%; border-radius: 4px; background: linear-gradient(90deg, var(--accent), #a78bfa); transition: width .5s ease; }
.hot-count { width: 32px; text-align: right; font-size: .72rem; font-weight: 700; color: var(--text-secondary); }
/* 30-day trend 箭头 */
.hot-trend {
  min-width: 52px; text-align: right; font-size: .68rem; font-weight: 600;
  font-variant-numeric: tabular-nums; letter-spacing: -.01em;
}
.hot-trend.trend-up   { color: #ef4444; }   /* 红色升 (孔雀爱用红色升温) */
.hot-trend.trend-down { color: #10b981; }   /* 绿色降 */
.hot-trend.trend-flat { color: var(--text-muted); }
.hot-trend.trend-new  { color: #f59e0b; font-weight: 700; }

/* ========== 论文卡片网格 ========== */
.paper-list {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 16px; align-content: start;
}
.layout.has-detail .paper-list { grid-template-columns: 1fr; }
.loading, .empty {
  text-align: center; padding: 60px 20px; color: var(--text-muted);
  grid-column: 1 / -1;
}

.loading-more-banner {
  text-align: center; padding: .55rem 1rem;
  font-size: .82rem; color: var(--text-muted);
  border: 1px dashed var(--border); border-radius: 8px;
  margin: .75rem 0; animation: pulse-opacity 1.4s ease-in-out infinite;
}
@keyframes pulse-opacity {
  0%, 100% { opacity: .55; }
  50%       { opacity: 1; }
}

@keyframes cardIn {
  from { opacity: 0; transform: translateY(12px) scale(.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.paper-card {
  position: relative; overflow: hidden;
  display: flex; flex-direction: column;
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.1rem 1.1rem 1.1rem 1.3rem;
  cursor: pointer;
  transition: all .35s cubic-bezier(.4,0,.2,1);
  animation: cardIn .4s ease forwards;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.paper-card::before {
  content: ''; position: absolute; top: 0; left: 0; bottom: 0; width: 4px;
  background: var(--border); transition: all .3s;
  border-radius: 4px 0 0 4px;
}
.paper-card::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(135deg, rgba(255,255,255,.03) 0%, transparent 40%);
}
.paper-card.domain-world_model::before { background: linear-gradient(180deg, #6366f1, #818cf8, #a78bfa); }
.paper-card.domain-physical_ai::before { background: linear-gradient(180deg, #10b981, #34d399, #6ee7b7); }
.paper-card.domain-medical_ai::before  { background: linear-gradient(180deg, #f43f5e, #fb7185, #fda4af); }
.paper-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-6px) scale(1.01);
  box-shadow: var(--shadow-hover);
  background: var(--card-bg-hover);
}
.paper-card.domain-world_model:hover { box-shadow: 0 16px 48px rgba(99,102,241,.18); }
.paper-card.domain-physical_ai:hover { box-shadow: 0 16px 48px rgba(16,185,129,.18); }
.paper-card.domain-medical_ai:hover  { box-shadow: 0 16px 48px rgba(244,63,94,.18); }

:root[data-theme="light"] .paper-card {
  box-shadow: var(--shadow-card);
  border-color: #e2e5ed;
}
:root[data-theme="light"] .paper-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: #c8cde0;
}
:root[data-theme="light"] .paper-card::after { display: none; }
:root[data-theme="light"] .paper-card.domain-world_model:hover { box-shadow: 0 8px 28px rgba(91,94,246,.13), 0 2px 8px rgba(0,0,0,.06); }
:root[data-theme="light"] .paper-card.domain-physical_ai:hover { box-shadow: 0 8px 28px rgba(16,185,129,.12), 0 2px 8px rgba(0,0,0,.06); }
:root[data-theme="light"] .paper-card.domain-medical_ai:hover  { box-shadow: 0 8px 28px rgba(244,63,94,.12),  0 2px 8px rgba(0,0,0,.06); }
:root[data-theme="light"] .paper-card:hover { border-color: #b8b8c8; }
.fav-btn {
  position: absolute; bottom: .55rem; right: .65rem; z-index: 2;
  background: rgba(255,255,255,.04); border: 1px solid var(--border);
  cursor: pointer; font-size: 1rem; line-height: 1;
  width: 30px; height: 30px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--text-dim); transition: all .2s;
  backdrop-filter: blur(6px);
}
.fav-btn:hover { transform: scale(1.12); color: #fbbf24; border-color: rgba(251,191,36,.5); background: rgba(251,191,36,.1); }
.fav-btn.active { color: #fbbf24; border-color: rgba(251,191,36,.5); background: rgba(251,191,36,.12); }

/* 卡片日期 + 代码/PDF 链接 */
.paper-date { color: var(--text-dim); font-size: .85em; }
.meta-link {
  display: inline-flex; align-items: center; gap: 2px;
  padding: 1px 8px; border-radius: 999px;
  background: rgba(99,102,241,.12); color: #a5b4fc;
  text-decoration: none; font-size: .8em; font-weight: 500;
  border: 1px solid rgba(99,102,241,.25);
  transition: all .2s;
}
.meta-link:hover { background: rgba(99,102,241,.22); transform: translateY(-1px); }
.meta-link.code-link { background: rgba(16,185,129,.12); color: #6ee7b7; border-color: rgba(16,185,129,.25); }
.meta-link.code-link:hover { background: rgba(16,185,129,.22); }

/* 细分方向：含 count + new-badge */
.subdomain-item { position: relative; display: inline-flex; align-items: center; gap: 6px; }
.subdomain-item .count { font-weight: 700; color: var(--text); font-size: .8em; opacity: .8; }
.subdomain-item .new-badge {
  background: linear-gradient(135deg, #f43f5e, #fb7185);
  color: #fff; font-size: .65em; font-weight: 700;
  padding: 1px 6px; border-radius: 999px; line-height: 1.4;
}
.subdomain-domain-header {
  width: 100%; margin: .6rem 0 .3rem; font-size: .8rem; font-weight: 700;
  color: var(--text-dim); letter-spacing: .04em; text-transform: uppercase;
}
.subdomain-domain-header:first-child { margin-top: 0; }
.subdomain-domain-header.world_model { color: #a5b4fc; }
.subdomain-domain-header.physical_ai { color: #6ee7b7; }
.subdomain-domain-header.medical_ai  { color: #fda4af; }

.subdomain-hint {
  padding: .4rem .8rem; border-radius: 8px;
  background: rgba(99,102,241,.06); border: 1px dashed rgba(99,102,241,.25);
  color: var(--text-dim); font-size: .8rem; line-height: 1.5;
}
.subdomain-title {
  display: flex; align-items: center; gap: .8rem; margin-bottom: .6rem;
  font-size: .9rem; flex-wrap: wrap;
}
.subdomain-domain-tag {
  padding: 4px 12px; border-radius: 999px; font-weight: 700; font-size: .85rem;
  background: rgba(255,255,255,.06); border: 1px solid var(--border);
}
.subdomain-domain-tag.world_model { color: #a5b4fc; border-color: rgba(99,102,241,.4); background: rgba(99,102,241,.08); }
.subdomain-domain-tag.physical_ai { color: #6ee7b7; border-color: rgba(16,185,129,.4); background: rgba(16,185,129,.08); }
.subdomain-domain-tag.medical_ai  { color: #fda4af; border-color: rgba(244,63,94,.4); background: rgba(244,63,94,.08); }
.subdomain-sub { color: var(--text-dim); font-size: .8rem; }
.subdomain-clear {
  margin-left: auto; padding: 3px 10px; border-radius: 8px;
  background: rgba(244,63,94,.12); border: 1px solid rgba(244,63,94,.3);
  color: #fda4af; font-size: .78rem; cursor: pointer; transition: all .2s;
}
.subdomain-clear:hover { background: rgba(244,63,94,.22); }

/* ===== 精选模式：全宽 Venue Picker ===== */
.venue-picker {
  max-width: 1440px; margin: 0 auto 0;
  padding: 1rem 1.5rem 1.2rem;
  background: var(--card-bg); border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}
.vp-header {
  display: flex; align-items: center; flex-wrap: wrap;
  gap: .8rem 1.5rem; margin-bottom: 1rem;
  padding-bottom: .9rem; border-bottom: 1px solid var(--border);
}
.venue-picker-domains {
  display: flex; flex-wrap: wrap; gap: .5rem;
}
.vp-year-row {
  display: flex; align-items: center; gap: .4rem; flex-wrap: wrap;
}
.vp-year-label {
  font-size: .78rem; font-weight: 600; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: .05em; margin-right: .2rem;
}
.vpy-btn {
  padding: 5px 14px; border-radius: 999px; font-size: .82rem; font-weight: 600;
  border: 1.5px solid var(--border); background: transparent;
  color: var(--text-dim); cursor: pointer; transition: all .18s;
}
.vpy-btn:hover { border-color: var(--border-hover); color: var(--text); }
.vpy-btn.active {
  background: rgba(99,102,241,.15); border-color: rgba(99,102,241,.5);
  color: #a5b4fc;
}
.vpd-btn {
  padding: 6px 16px; border-radius: 999px; font-size: .85rem; font-weight: 600;
  border: 1.5px solid var(--border); background: transparent;
  color: var(--text-dim); cursor: pointer; transition: all .22s;
}
.vpd-btn:hover { border-color: var(--border-hover); color: var(--text); }
.vpd-btn.active { color: #fff; border-color: transparent; }
.vpd-btn.active[data-domain="all"]         { background: linear-gradient(135deg,#6366f1,#10b981); }
.vpd-btn.active.world_model                { background: linear-gradient(135deg,#6366f1,#818cf8); }
.vpd-btn.active.physical_ai               { background: linear-gradient(135deg,#10b981,#34d399); }
.vpd-btn.active.medical_ai                { background: linear-gradient(135deg,#f43f5e,#fb7185); }

.vpc-hint {
  padding: .7rem 1rem; color: var(--text-dim); font-size: .88rem;
}
.vpc-domain-title {
  font-size: .95rem; font-weight: 700; margin: .9rem 0 .4rem;
  display: flex; align-items: center; gap: .4rem;
}
.vpc-domain-title.world_model { color: #a5b4fc; }
.vpc-domain-title.physical_ai { color: #6ee7b7; }
.vpc-domain-title.medical_ai  { color: #fda4af; }
.vpc-domain-title:first-child { margin-top: 0; }

.vpc-group { margin-bottom: .5rem; }
.vpc-category-toggle {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; padding: 6px 10px; border-radius: 8px;
  background: rgba(255,255,255,.03); border: 1px solid var(--border);
  cursor: pointer; transition: all .18s;
  font-size: .78rem; font-weight: 600; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: .04em;
  text-align: left;
}
.vpc-category-toggle:hover { background: rgba(255,255,255,.06); color: var(--text); }
.vpc-category-toggle.open { color: var(--text); border-color: var(--border-hover); }
.vpc-toggle-icon { font-size: .65rem; opacity: .6; }
.vpc-chips {
  display: flex; flex-wrap: wrap; gap: .4rem;
  padding: .5rem .25rem .25rem;
  overflow: hidden; transition: max-height .25s ease;
}
.vpc-chips.collapsed { display: none; }
.vpc-chip {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 4px 12px; border-radius: 999px; font-size: .8rem;
  border: 1px solid var(--border); background: rgba(255,255,255,.03);
  color: var(--text-dim); cursor: pointer; transition: all .18s;
  white-space: nowrap;
}
.vpc-chip:hover { border-color: var(--border-hover); color: var(--text); background: rgba(255,255,255,.06); }
.vpc-chip.has-papers { color: var(--text); border-color: rgba(99,102,241,.35); }
.vpc-chip.active {
  background: rgba(99,102,241,.15); border-color: rgba(99,102,241,.6);
  color: #a5b4fc; font-weight: 600;
}
.vpc-cnt {
  font-size: .72rem; font-weight: 700;
  background: rgba(99,102,241,.25); color: #a5b4fc;
  border-radius: 999px; padding: 0 6px;
}

/* 收藏汇总 Modal */
.fav-modal { position: fixed; inset: 0; z-index: 1000; display: flex; align-items: center; justify-content: center; }
.fav-modal[hidden] { display: none !important; }
.fav-modal-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,.6); backdrop-filter: blur(4px); }
.fav-modal-content {
  position: relative; background: var(--card-bg); border: 1px solid var(--border);
  border-radius: 16px; max-width: 980px; width: 92%; max-height: 88vh;
  display: flex; flex-direction: column; box-shadow: 0 24px 64px rgba(0,0,0,.5);
  overflow: hidden;
}
.fav-modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 1.4rem; border-bottom: 1px solid var(--border);
}
.fav-modal-header h2 { margin: 0; font-size: 1.1rem; display: flex; align-items: center; gap: 8px; }
.fav-count-pill {
  background: rgba(251,191,36,.18); color: #fbbf24;
  padding: 2px 10px; border-radius: 999px; font-size: .85rem; font-weight: 700;
}
.fav-modal-actions { display: flex; gap: 8px; align-items: center; }
.fav-mini-btn {
  background: rgba(255,255,255,.06); border: 1px solid var(--border); color: var(--text);
  padding: 4px 10px; border-radius: 8px; font-size: .8rem; cursor: pointer; transition: all .2s;
}
.fav-mini-btn:hover { background: rgba(255,255,255,.12); }

/* 导出格式菜单 */
.fav-export-wrap { position: relative; }
.fav-export-menu {
  position: absolute; top: calc(100% + 6px); right: 0;
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: 10px; box-shadow: 0 8px 32px rgba(0,0,0,.5);
  z-index: 3000; min-width: 148px; padding: .35rem; overflow: hidden;
}
.fav-export-menu[hidden] { display: none; }
.fav-export-item {
  display: flex; align-items: center; gap: 8px;
  padding: .42rem .65rem; border-radius: 7px;
  font-size: .83rem; cursor: pointer; transition: background .12s; color: var(--text);
  white-space: nowrap;
}
.fav-export-item:hover { background: rgba(255,255,255,.09); }
.fav-export-item-icon { font-size: .95rem; width: 18px; text-align: center; }
.fav-export-item-label { flex: 1; }
.fav-export-item-hint { font-size: .7rem; color: var(--text-muted); }
.fav-modal-layout { display: flex; flex: 1; overflow: hidden; min-height: 0; }
.fav-modal-body {
  flex: 1; padding: 1rem 1.4rem; overflow-y: auto; display: grid; gap: .8rem; align-content: start;
}

/* ── 标签侧栏 ── */
.fav-tag-sidebar {
  width: 175px; min-width: 150px; border-right: 1px solid var(--border);
  display: flex; flex-direction: column; overflow-y: auto; padding: .75rem .6rem;
  gap: 2px;
}
.fav-tag-sidebar-title {
  font-size: .68rem; font-weight: 700; color: var(--text-muted); padding: 0 .3rem .5rem;
  text-transform: uppercase; letter-spacing: .08em;
}
.fav-tag-item {
  display: flex; align-items: center; gap: 7px; padding: .38rem .55rem;
  border-radius: 8px; cursor: pointer; transition: background .15s;
  font-size: .83rem; border: 1px solid transparent; position: relative;
}
.fav-tag-item:hover { background: rgba(255,255,255,.06); }
.fav-tag-item.active { background: rgba(255,255,255,.1); border-color: var(--border-hover); }
.fav-tag-dot { width: 9px; height: 9px; border-radius: 50%; flex-shrink: 0; }
.fav-tag-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.fav-tag-count { font-size: .7rem; color: var(--text-muted); }
.fav-tag-del {
  opacity: 0; font-size: .68rem; color: var(--text-muted); padding: 2px 5px;
  border-radius: 4px; transition: opacity .15s, color .15s;
  cursor: pointer; background: none; border: none; line-height: 1;
}
.fav-tag-item:hover .fav-tag-del { opacity: 1; }
.fav-tag-del:hover { color: #f87171; background: rgba(248,113,113,.12); }
.fav-tag-new-btn {
  display: flex; align-items: center; gap: 6px; padding: .38rem .55rem;
  border-radius: 8px; cursor: pointer; font-size: .82rem;
  background: none; border: 1px dashed var(--border); color: var(--text-muted);
  width: 100%; text-align: left; margin-top: .6rem; transition: all .2s; flex-shrink: 0;
}
.fav-tag-new-btn:hover { border-color: var(--accent); color: var(--accent); }

/* 新建标签表单 */
.fav-tag-create-form {
  margin-top: .5rem; padding: .5rem .3rem;
  display: flex; flex-direction: column; gap: .45rem; flex-shrink: 0;
}
.fav-tag-create-form input[type="text"] {
  background: var(--surface-bg); border: 1px solid var(--border); color: var(--text);
  padding: .32rem .55rem; border-radius: 6px; font-size: .82rem; outline: none; width: 100%; box-sizing: border-box;
}
.fav-tag-create-form input[type="text"]:focus { border-color: var(--accent); }
.fav-tag-color-row { display: flex; gap: 5px; flex-wrap: wrap; padding: 2px 0; }
.fav-tag-color-swatch {
  width: 17px; height: 17px; border-radius: 50%; cursor: pointer;
  border: 2px solid transparent; transition: border-color .15s, transform .12s; flex-shrink: 0;
}
.fav-tag-color-swatch.selected { border-color: #fff; transform: scale(1.18); }
.fav-tag-create-actions { display: flex; gap: 5px; }
.fav-tag-create-actions button {
  flex: 1; padding: .28rem; border-radius: 6px; font-size: .78rem; cursor: pointer; border: 1px solid var(--border);
  transition: all .15s;
}
.fav-tag-create-confirm {
  background: var(--accent); color: #fff; border-color: var(--accent) !important; font-weight: 600;
}
.fav-tag-create-confirm:hover { opacity: .88; }
.fav-tag-create-cancel { background: transparent; color: var(--text-secondary); }
.fav-tag-create-cancel:hover { background: rgba(255,255,255,.06); }

/* 论文卡片内的标签 chips */
.paper-tag-chips {
  display: flex; gap: 4px; flex-wrap: wrap; margin-top: .4rem; align-items: center;
}
.paper-tag-chip {
  display: inline-flex; align-items: center; gap: 3px;
  padding: 2px 8px 2px 7px; border-radius: 999px; font-size: .7rem; font-weight: 500;
  cursor: default;
}
.paper-tag-chip-del {
  cursor: pointer; font-size: .65rem; line-height: 1; opacity: .6; transition: opacity .15s;
  background: none; border: none; padding: 0; color: inherit;
}
.paper-tag-chip-del:hover { opacity: 1; }
.paper-tag-add-btn {
  display: inline-flex; align-items: center; gap: 2px;
  padding: 2px 7px; border-radius: 999px; font-size: .7rem;
  background: transparent; border: 1px dashed var(--border);
  color: var(--text-muted); cursor: pointer; transition: all .15s;
}
.paper-tag-add-btn:hover { border-color: var(--accent); color: var(--accent); }

/* 标签选择气泡 */
.tag-picker-popup {
  position: fixed; background: var(--card-bg); border: 1px solid var(--border);
  border-radius: 10px; box-shadow: 0 8px 40px rgba(0,0,0,.55); z-index: 3000;
  padding: .4rem; min-width: 155px;
}
.tag-picker-item {
  display: flex; align-items: center; gap: 7px; padding: .35rem .5rem;
  border-radius: 6px; cursor: pointer; font-size: .82rem; transition: background .12s;
  user-select: none;
}
.tag-picker-item:hover { background: rgba(255,255,255,.08); }
.tag-picker-check { margin-left: auto; font-size: .75rem; color: var(--accent); }
.tag-picker-empty { font-size: .8rem; color: var(--text-muted); padding: .5rem; text-align: center; }
.tag-picker-new {
  border-top: 1px solid var(--border); margin-top: .3rem; padding-top: .35rem;
  color: var(--accent); font-size: .8rem;
}

.paper-domains { display: flex; gap: .3rem; margin-bottom: .5rem; align-items: center; flex-wrap: wrap; }
.paper-domain-badge {
  font-size: .6rem; padding: .14rem .4rem; border-radius: 6px;
  font-weight: 700; text-transform: uppercase; letter-spacing: .05em;
  backdrop-filter: blur(4px);
}
.paper-domain-badge.world_model { background: rgba(99,102,241,.18);  color: #a5b4fc; border: 1px solid rgba(99,102,241,.25); }
.paper-domain-badge.physical_ai { background: rgba(16,185,129,.18);  color: #6ee7b7; border: 1px solid rgba(16,185,129,.25); }
.paper-domain-badge.medical_ai  { background: rgba(244,63,94,.18);   color: #fda4af; border: 1px solid rgba(244,63,94,.25); }
:root[data-theme="light"] .paper-domain-badge.world_model { color: #4f46e5; background: rgba(99,102,241,.12); border-color: rgba(99,102,241,.2); }
:root[data-theme="light"] .paper-domain-badge.physical_ai { color: #059669; background: rgba(16,185,129,.12); border-color: rgba(16,185,129,.2); }
:root[data-theme="light"] .paper-domain-badge.medical_ai  { color: #e11d48; background: rgba(244,63,94,.12);  border-color: rgba(244,63,94,.2); }

.paper-type {
  font-size: .55rem; padding: .12rem .35rem; border-radius: 6px;
  margin-left: auto; font-weight: 700; text-transform: uppercase; letter-spacing: .04em;
}
.paper-type.Method  { background: rgba(129,140,248,.15); color: #a5b4fc; }
.paper-type.Dataset { background: rgba(16,185,129,.15);  color: #6ee7b7; }
.paper-type.Survey  { background: rgba(244,63,94,.15);   color: #fda4af; }
:root[data-theme="light"] .paper-type.Method  { color: #4f46e5; }
:root[data-theme="light"] .paper-type.Dataset { color: #059669; }
:root[data-theme="light"] .paper-type.Survey  { color: #e11d48; }

.paper-title {
  font-size: .95rem; font-weight: 600; margin: 0 0 .45rem;
  line-height: 1.5; color: var(--text);
}
.paper-meta {
  display: flex; flex-wrap: wrap; gap: .4rem; font-size: .7rem;
  color: var(--text-muted); margin-bottom: .5rem; align-items: center;
}
.venue-badge {
  padding: 2px 8px; border-radius: 6px; font-weight: 700; font-size: .65rem;
  background: rgba(255,255,255,.05); color: var(--text-secondary);
  border: 1px solid var(--surface-border);
}
.venue-badge.tier-ccf-a       { background: rgba(248,113,113,.15);  color: var(--tier-ccf-a);  border-color: rgba(248,113,113,.25); }
.venue-badge.tier-t1          { background: rgba(196,181,253,.15);  color: var(--tier-t1);     border-color: rgba(196,181,253,.25); }
.venue-badge.tier-t2          { background: rgba(216,180,254,.15);  color: var(--tier-t2);     border-color: rgba(216,180,254,.25); }
.venue-badge.tier-视觉顶刊    { background: rgba(110,231,183,.15);  color: var(--tier-visual); border-color: rgba(110,231,183,.25); }
.venue-badge.tier-机器人顶会  { background: rgba(147,197,253,.15);  color: var(--tier-robot);  border-color: rgba(147,197,253,.25); }
.venue-badge.tier-医学顶会    { background: rgba(249,168,212,.15);  color: var(--tier-medical);border-color: rgba(249,168,212,.25); }
.venue-badge.tier-arxiv       { background: rgba(148,163,184,.12);  color: var(--tier-arxiv);  border-color: rgba(148,163,184,.22); }
:root[data-theme="light"] .venue-badge.tier-ccf-a    { color: #dc2626; }
:root[data-theme="light"] .venue-badge.tier-t1       { color: #7c3aed; }
:root[data-theme="light"] .venue-badge.tier-t2       { color: #9333ea; }
:root[data-theme="light"] .venue-badge.tier-视觉顶刊 { color: #059669; }
:root[data-theme="light"] .venue-badge.tier-机器人顶会 { color: #2563eb; }
:root[data-theme="light"] .venue-badge.tier-医学顶会 { color: #db2777; }

.citation { font-weight: 700; color: var(--text-secondary); }
.paper-authors { font-size: .72rem; color: var(--text-muted); margin-bottom: .5rem; }
.paper-abstract {
  font-size: .76rem; color: var(--text-secondary); margin-bottom: .35rem;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical;
  overflow: hidden; line-height: 1.55;
}
.paper-tasks { display: flex; flex-wrap: wrap; gap: .28rem; margin-top: auto; padding-top: .6rem; }
.task-tag {
  font-size: .6rem; padding: .12rem .38rem; border-radius: 6px;
  background: rgba(255,255,255,.04); color: var(--text-muted);
  border: 1px solid rgba(255,255,255,.08);
}
:root[data-theme="light"] .task-tag { background: rgba(0,0,0,.04); border-color: rgba(0,0,0,.08); }

/* curated-only 筛选区 */
.curated-only { display: none; }
.mode-curated .curated-only { display: block; }

/* ========== 右侧详情面板 ========== */
.detail-panel {
  position: sticky; top: 110px; max-height: calc(100vh - 130px); overflow-y: auto;
  background: var(--card-bg); border: 1px solid var(--border); border-radius: 16px;
  padding: 24px; align-self: start;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
/* Desktop close button — inside panel */
.detail-close-desktop {
  position: absolute; top: 12px; right: 12px;
  background: var(--surface-bg); border: 1px solid var(--surface-border);
  border-radius: 6px; width: 28px; height: 28px;
  font-size: 14px; color: var(--text-muted); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
}
.detail-close-desktop:hover { color: var(--text); border-color: var(--surface-hover-border); }
/* Mobile back button — outside panel, hidden by default, shown via JS */
.detail-close { display: none; }
.detail-close-back { display: none; }
.detail-close-x { display: inline; }
.detail-body h2 { margin: 0 0 12px; font-size: 1.1rem; line-height: 1.35; color: var(--text); }
.detail-body h4 {
  margin: 20px 0 8px; font-size: 11px; text-transform: uppercase;
  color: var(--text-muted); letter-spacing: .08em; font-weight: 700;
}
.detail-body p { margin: 0 0 12px; line-height: 1.65; font-size: .85rem; color: var(--text-secondary); }
.detail-body a { color: var(--accent); text-decoration: none; }
.detail-body a:hover { text-decoration: underline; }
.refs-list { list-style: none; padding: 0; margin: 0; }
.refs-list li {
  padding: 8px 0; border-bottom: 1px solid var(--surface-border);
  font-size: .78rem; color: var(--text-secondary);
}
.refs-list li:last-child { border-bottom: none; }

/* AI 中文解读 section */
.ai-explain {
  margin: 16px 0;
  padding: 12px 14px;
  background: linear-gradient(135deg, rgba(100, 108, 255, .08), rgba(159, 122, 234, .08));
  border-left: 3px solid var(--accent);
  border-radius: 6px;
}
.ai-explain h4 { margin: 0 0 10px !important; color: var(--accent) !important; }
.ai-summary { margin: 0 0 10px; font-size: .85rem; line-height: 1.65; color: var(--text); }
.ai-insights { margin: 0; padding-left: 18px; }
.ai-insights li {
  margin: 6px 0; font-size: .82rem; line-height: 1.55; color: var(--text-secondary);
}
.ai-empty { background: rgba(127, 127, 127, .06); border-left-color: var(--text-muted); }
.ai-empty .ai-placeholder { font-size: .8rem; color: var(--text-muted); margin: 0; }
.ai-fallback-hint { font-size: .7rem; color: var(--text-muted); font-weight: 400; margin-left: .4rem; }
.ai-ondemand-btn {
  margin-left: 8px; padding: 4px 10px; font-size: .75rem;
  background: var(--accent); color: white; border: none; border-radius: 4px;
  cursor: pointer; opacity: 0.5;
}
.ai-ondemand-btn:not(:disabled) { opacity: 1; cursor: pointer; }
.ai-ondemand-btn:not(:disabled):hover { background: var(--accent-hover, var(--accent)); }

@media (max-width: 1100px) {
  .layout, .layout.has-detail { grid-template-columns: 1fr; }
  .sidebar { position: static; max-height: none; }
  .detail-panel { position: static; max-height: none; }
  .paper-list, .layout.has-detail .paper-list { grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .charts-section { grid-template-columns: 1fr; }
  /* 折叠侧栏 — 内容默认隐藏，toggle 按钮可见 */
  .sidebar-toggle { display: flex; }
  .sidebar-content { display: none; }
  .sidebar-content.open { display: block; padding-top: 12px; border-top: 1px solid var(--border); }
}
@media (max-width: 600px) {
  .topbar { flex-wrap: wrap; gap: 8px 12px; padding: 10px 12px; }
  /* 行1: brand(左) + topbar-right(右) */
  .brand       { order: 1; }
  .topbar-right { order: 2; margin-left: auto; }
  /* 行2: 导航标签全宽 */
  .mode-tabs   { order: 3; width: 100%; gap: 6px; }
  .mode-tab    { flex: 1; text-align: center; padding: 6px 8px; font-size: 13px; }
  /* 行3: 搜索框全宽 */
  .search      { order: 4; width: 100%; max-width: none; }

  .domain-bar { padding: 10px 12px; overflow-x: auto; flex-wrap: nowrap; }
  .layout { padding: 12px; }
  .paper-list, .layout.has-detail .paper-list { grid-template-columns: 1fr; }
  .stat-value { font-size: 1.5rem; }
}

/* ========== Footer ========== */
.site-footer {
  margin-top: 40px;
  padding: 20px 24px;
  border-top: 1px solid var(--border);
  background: var(--header-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}
.footer-inner {
  max-width: 1600px; margin: 0 auto;
  display: flex; align-items: center; justify-content: center;
  flex-wrap: wrap; gap: 8px 28px;
}
.footer-stat {
  display: flex; align-items: center; gap: 5px;
  font-size: 13px; color: var(--text-muted);
}
.footer-icon { font-size: 14px; }
.footer-num {
  font-weight: 600; color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

/* ========== About Modal ========== */
.about-modal {
  position: fixed; inset: 0; z-index: 9000;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
}
.about-modal[hidden] { display: none !important; }
.about-backdrop {
  position: absolute; inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  animation: fadeIn .2s ease;
}
.about-content-wrapper {
  position: relative; z-index: 1;
  width: 100%; max-width: 560px;
  animation: slideUp .3s cubic-bezier(.22,.61,.36,1);
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { opacity: 0; transform: translateY(20px) scale(.98); } to { opacity: 1; transform: translateY(0) scale(1); } }

.about-modal-content {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 32px;
  position: relative;
  box-shadow: 0 25px 80px rgba(0,0,0,.4), 0 0 0 1px rgba(255,255,255,.05);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}

.about-header {
  text-align: center; margin-bottom: 28px; padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.about-logo {
  width: 64px; height: 64px; margin: 0 auto 16px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--accent), rgba(129,140,248,.3));
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 32px rgba(129,140,248,.3);
}
.about-logo svg {
  width: 28px; height: 28px;
  color: #fff;
}
.about-header h2 {
  margin: 0 0 8px;
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--logo-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.about-tagline {
  margin: 0;
  font-size: .95rem;
  color: var(--text-secondary);
}

.about-features-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 28px;
}
.feature-card {
  background: var(--surface-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  transition: all .2s ease;
}
.feature-card:hover {
  border-color: var(--border-hover);
  background: var(--card-bg-hover);
  transform: translateY(-2px);
}
.feature-icon {
  font-size: 1.5rem;
  margin-bottom: 10px;
}
.feature-card h3 {
  margin: 0 0 6px;
  font-size: .9rem;
  font-weight: 600;
  color: var(--text);
}
.feature-card p {
  margin: 0;
  font-size: .8rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.about-contact {
  background: linear-gradient(135deg, rgba(129,140,248,.08), rgba(16,185,129,.04));
  border: 1px solid rgba(129,140,248,.2);
  border-radius: 12px;
  padding: 18px 20px;
  text-align: center;
}
.about-contact h3 {
  margin: 0 0 12px;
  font-size: .95rem;
  font-weight: 600;
  color: var(--text);
}
.contact-email {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 10px 20px;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  color: #fff;
  text-decoration: none;
  border-radius: 999px;
  font-size: .9rem;
  font-weight: 500;
  transition: all .2s ease;
  box-shadow: 0 4px 16px rgba(129,140,248,.4);
}
.contact-email:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(129,140,248,.5);
}
.contact-email svg {
  width: 16px; height: 16px;
}

.about-close {
  position: absolute; top: 14px; right: 14px;
  width: 32px; height: 32px;
  border: none; border-radius: 8px;
  background: var(--surface-bg);
  color: var(--text-muted);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all .2s ease;
}
.about-close svg {
  width: 16px; height: 16px;
}
.about-close:hover {
  background: var(--card-bg-hover);
  color: var(--text);
}

/* ========== Auth Modal ========== */
.auth-modal {
  position: fixed; inset: 0; z-index: 9000;
  display: flex; align-items: center; justify-content: center;
}
.auth-modal[hidden] { display: none !important; }
.auth-backdrop {
  position: absolute; inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.auth-box {
  position: relative; z-index: 1;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 32px 36px;
  width: 100%; max-width: 400px;
  box-shadow: 0 24px 80px rgba(0,0,0,.6);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  animation: authSlideIn .22s cubic-bezier(.22,.61,.36,1);
}
@keyframes authSlideIn {
  from { opacity: 0; transform: translateY(-18px) scale(.97); }
  to   { opacity: 1; transform: none; }
}
.auth-close {
  position: absolute; top: 14px; right: 14px;
  background: none; border: none; cursor: pointer;
  color: var(--text-muted); font-size: 16px; padding: 4px 8px;
  border-radius: 6px; transition: color .15s, background .15s;
}
.auth-close:hover { color: var(--text); background: var(--surface-bg); }

/* Tabs */
.auth-tabs {
  display: flex; gap: 4px; margin-bottom: 24px;
  background: var(--surface-bg); border-radius: 10px; padding: 3px;
}
.auth-tab {
  flex: 1; padding: 8px; border: none; border-radius: 8px;
  background: none; color: var(--text-muted); cursor: pointer;
  font-size: 14px; font-weight: 500; transition: all .17s;
}
.auth-tab.active {
  background: var(--card-bg);
  color: var(--text);
  box-shadow: 0 1px 6px rgba(0,0,0,.25);
}

/* Form */
.auth-form { display: flex; flex-direction: column; gap: 14px; }
.auth-form.hidden { display: none; }
.auth-form label {
  display: flex; flex-direction: column; gap: 5px;
  font-size: 13px; font-weight: 500; color: var(--text-secondary);
}
.auth-form input {
  padding: 9px 12px;
  background: var(--surface-bg);
  border: 1px solid var(--surface-border);
  border-radius: 8px; color: var(--text);
  font-size: 14px; transition: border-color .18s;
  outline: none;
}
.auth-form input:focus { border-color: var(--accent); }
.auth-error {
  min-height: 18px;
  font-size: 13px; color: var(--medical-ai);
  font-weight: 500;
}
.auth-submit {
  padding: 10px; border: none; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  color: #fff; font-size: 15px; font-weight: 600;
  cursor: pointer; margin-top: 4px;
  box-shadow: 0 0 18px rgba(129,140,248,.35);
  transition: opacity .18s, box-shadow .18s;
}
.auth-submit:hover { opacity: .9; box-shadow: 0 0 28px rgba(129,140,248,.5); }
.auth-submit:disabled { opacity: .55; cursor: not-allowed; }

/* Divider */
.auth-divider {
  display: flex; align-items: center; gap: 10px;
  color: var(--text-muted); font-size: 13px; margin: 18px 0;
}
.auth-divider::before, .auth-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}

/* GitHub button */
.auth-github {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  width: 100%; padding: 10px 16px;
  background: var(--surface-bg);
  border: 1px solid var(--border);
  border-radius: 10px; color: var(--text);
  font-size: 14px; font-weight: 500; cursor: pointer;
  transition: border-color .18s, background .18s;
}
.auth-github:hover {
  border-color: var(--border-hover);
  background: var(--card-bg-hover);
}

/* Logged-in state */
.auth-logged-in {
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  padding-top: 8px;
}
.auth-logged-in.hidden { display: none; }
.auth-avatar {
  width: 64px; height: 64px; border-radius: 50%;
  overflow: hidden; font-size: 36px; line-height: 64px;
  text-align: center;
  border: 2px solid var(--border);
  background: var(--surface-bg);
}
.auth-avatar img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }
.auth-user-email {
  font-size: 14px; color: var(--text-secondary); word-break: break-all; text-align: center;
}
.auth-signout {
  padding: 8px 20px; border-radius: 8px;
  background: none; border: 1px solid var(--border);
  color: var(--text-muted); cursor: pointer; font-size: 14px;
  transition: all .18s;
}
.auth-signout:hover { border-color: var(--medical-ai); color: var(--medical-ai); }

/* btn-auth — logged in state */
.btn-auth.logged-in {
  display: flex; align-items: center; gap: 7px;
  background: var(--surface-bg);
  border: 1px solid var(--border);
  color: var(--text); padding: 6px 12px;
  box-shadow: none;
}
.btn-auth.logged-in .btn-avatar {
  width: 22px; height: 22px; border-radius: 50%; overflow: hidden;
  font-size: 15px; line-height: 22px; text-align: center;
  background: var(--surface-bg);
}

/* ========== Responsive Design & Beautification ========== */

/* Tablet & Small Desktop */
@media (max-width: 1200px) {
  .layout {
    grid-template-columns: 200px 1fr 0;
    padding: 16px 20px;
  }
  .search {
    max-width: 300px;
  }
  .dashboard {
    gap: 16px;
    padding: 16px;
  }
}

/* Mobile & Tablet */
@media (max-width: 900px) {
  /* Topbar */
  .topbar {
    padding: 10px 16px;
    gap: 10px;
    flex-wrap: wrap;
  }
  .brand {
    font-size: 18px;
  }
  .mode-tabs {
    order: 3;
    width: 100%;
    justify-content: flex-start;
    padding-top: 8px;
    border-top: 1px solid var(--border);
    margin-top: 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    flex-wrap: nowrap;
  }
  .mode-tabs::-webkit-scrollbar { display: none; }
  .mode-tab {
    padding: 8px 16px;
    font-size: 13px;
    flex-shrink: 0;
  }
  .search {
    max-width: none;
    flex: 1;
    min-width: 120px;
  }
  .topbar-right {
    gap: 6px;
  }
  .theme-toggle, .lang-toggle {
    padding: 6px 8px;
    font-size: 13px;
  }
  .btn-about {
    width: 34px;
    height: 34px;
  }
  .btn-auth {
    padding: 7px 12px;
    font-size: 13px;
  }

  /* Domain Bar */
  .domain-bar {
    padding: 10px 16px;
    gap: 6px;
  }
  .domain-tab {
    padding: 6px 12px;
    font-size: 13px;
  }

  /* Topic cards & predictions — 2 columns on tablet */
  .topics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .predictions-container {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Layout */
  .layout {
    grid-template-columns: 1fr;
    padding: 12px 16px 40px;
    gap: 16px;
  }
  .sidebar {
    position: static;
    padding: 12px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-bottom: 12px;
  }
  .sidebar-toggle {
    display: flex;
  }
  .sidebar-content {
    display: none;
  }
  .sidebar-content.open {
    display: block;
    padding-top: 12px;
    border-top: 1px solid var(--border);
  }
  .detail-panel {
    position: fixed;
    inset: 0;
    z-index: 500;
    transform: translateX(100%);
    transition: transform .3s cubic-bezier(.4,0,.2,1);
    border-radius: 0;
    max-height: 100vh;
    overflow-y: auto;
    padding: 60px 20px 40px;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: var(--bg);
  }
  .detail-panel.active {
    transform: translateX(0);
  }
  .detail-close-desktop { display: none; }
  .detail-close-back { display: inline; }
  .detail-close-x { display: none; }
  /* Back button — fixed at viewport top, outside transformed detail-panel */
  .detail-close {
    display: none;
    align-items: center;
    gap: 6px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 600;
    width: 100%;
    height: 50px;
    padding: 0 16px;
    border-radius: 0;
    border: none;
    border-bottom: 1px solid var(--border);
    background: var(--header-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    font-size: 14px;
    font-weight: 500;
    color: var(--accent);
    cursor: pointer;
  }
  .detail-close::before {
    content: '←';
    font-size: 18px;
  }
}

/* Mobile Only */
@media (max-width: 640px) {
  /* Topbar */
  .topbar {
    padding: 8px 12px;
  }
  .brand {
    font-size: 16px;
  }
  .mode-tabs {
    gap: 6px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    flex-wrap: nowrap;
    justify-content: flex-start;
  }
  .mode-tabs::-webkit-scrollbar { display: none; }
  .mode-tab {
    padding: 7px 12px;
    font-size: 12px;
    flex-shrink: 0;
  }
  .search {
    padding: 7px 10px 7px 32px;
    background-position: 10px center;
    font-size: 14px;
  }
  .theme-toggle, .lang-toggle {
    padding: 5px 8px;
    font-size: 12px;
  }
  .btn-about {
    width: 32px;
    height: 32px;
  }
  .btn-about svg {
    width: 16px;
    height: 16px;
  }
  .btn-auth {
    padding: 6px 10px;
    font-size: 12px;
  }

  /* Domain Bar */
  .domain-bar {
    padding: 8px 12px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    flex-wrap: nowrap;
  }
  .domain-bar::-webkit-scrollbar {
    display: none;
  }
  .domain-tab {
    padding: 7px 14px;
    font-size: 12px;
    flex-shrink: 0;
  }

  /* Paper Cards */
  .paper-card {
    padding: 14px;
  }
  .paper-title {
    font-size: 15px;
    line-height: 1.5;
  }
  .paper-meta {
    flex-wrap: wrap;
    gap: 8px;
  }
  .paper-venue, .paper-date {
    font-size: 12px;
  }
  .paper-actions {
    gap: 6px;
  }
  .paper-fav-btn, .paper-link-btn {
    width: 34px;
    height: 34px;
  }

  /* Dashboard */
  .dashboard {
    grid-template-columns: 1fr;
    padding: 14px;
    gap: 12px;
  }
  .stat-card {
    padding: 14px;
  }
  .stat-value {
    font-size: 22px;
  }
  .stat-label {
    font-size: 13px;
  }

  /* Trending View */
  .trending-overview {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .trending-section {
    padding: 16px;
    margin-bottom: 12px;
  }
  .section-header h2 {
    font-size: 16px;
  }
  .section-header p {
    font-size: 13px;
  }
  .bar-chart-container {
    gap: 10px;
  }
  .bar-item {
    padding: 10px 12px;
  }
  .radar-container {
    padding: 8px 0;
  }
  .radar-chart svg {
    width: 100%;
    height: auto;
    max-width: 320px;
  }
  .hot-topic-grid {
    grid-template-columns: 1fr;
  }
  .hot-topic-card {
    padding: 14px;
  }
  .outlook-grid {
    grid-template-columns: 1fr;
  }
  .outlook-card {
    padding: 16px;
  }

  /* Topic cards & predictions — single column on mobile */
  .topics-grid {
    grid-template-columns: 1fr;
  }
  .predictions-container {
    grid-template-columns: 1fr;
  }
  .prediction-card {
    padding: 16px;
    gap: 12px;
  }
  .prediction-content h3 {
    font-size: .85rem;
  }
  .prediction-content p {
    font-size: .75rem;
    line-height: 1.6;
  }
  .prediction-tag {
    display: inline-block;
    margin-top: 4px;
  }

  /* About Modal — full-screen scrollable on mobile */
  .about-modal {
    align-items: flex-start;
    padding: 0;
    overflow-y: auto;
  }
  .about-content-wrapper {
    width: 100%;
    max-width: 100%;
    min-height: 100%;
    padding: 0;
    animation: none;
  }
  .about-modal-content {
    min-height: 100dvh;
    border-radius: 0;
    padding: 24px 20px 40px;
    max-width: 100%;
    box-shadow: none;
  }
  .about-header {
    margin-bottom: 20px;
    padding-bottom: 16px;
  }
  .about-header h2 {
    font-size: 1.3rem;
  }
  .about-features-grid {
    grid-template-columns: 1fr;
    gap: 10px;
    margin-bottom: 20px;
  }
  .feature-card {
    padding: 14px;
  }
  .about-close {
    top: 16px;
    right: 16px;
  }

  /* Detail Panel — mobile content */
  .detail-panel {
    box-sizing: border-box;
  }
  .detail-body {
    overflow-x: hidden;
    word-break: break-word;
    overflow-wrap: anywhere;
    max-width: 100%;
  }
  .detail-body h2 {
    font-size: 1rem;
    line-height: 1.4;
  }
  .detail-body h4 {
    font-size: .7rem;
    margin-top: 16px;
  }
  .detail-body p {
    font-size: .82rem;
    line-height: 1.65;
  }
  .detail-body a {
    display: inline-block;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .refs-list li {
    font-size: .78rem;
    word-break: break-word;
  }

  /* Empty State */
  .empty-state {
    padding: 60px 20px;
  }
  .empty-icon {
    font-size: 48px;
  }
  .empty-title {
    font-size: 16px;
  }
  .empty-text {
    font-size: 14px;
  }
}

/* Beautification Enhancements */

/* Smooth Scroll */
html {
  scroll-behavior: smooth;
}

/* Better Selection */
::selection {
  background: var(--accent);
  color: white;
}

::-moz-selection {
  background: var(--accent);
  color: white;
}

/* Enhanced Button Effects */
.mode-tab, .domain-tab, .theme-toggle, .lang-toggle, .btn-about, .btn-auth, .paper-fav-btn, .paper-link-btn {
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.mode-tab:active, .domain-tab:active, .btn-about:active, .btn-auth:active, .paper-fav-btn:active, .paper-link-btn:active {
  transform: scale(0.97);
}

/* Enhanced Hover Effects */
.paper-card {
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.paper-card:hover {
  transform: translateY(-2px);
}

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

/* Improved Typography */
body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Better Focus States */
.search:focus-visible,
.mode-tab:focus-visible,
.domain-tab:focus-visible,
.theme-toggle:focus-visible,
.lang-toggle:focus-visible,
.btn-about:focus-visible,
.btn-auth:focus-visible,
.paper-fav-btn:focus-visible,
.paper-link-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Animated Background Gradient */
@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.btn-auth {
  background-size: 200% 200%;
  animation: gradientShift 8s ease infinite;
}

/* Subtle Pulse Animation for Active State */
@keyframes subtlePulse {
  0%, 100% { box-shadow: 0 0 14px rgba(129,140,248,.4); }
  50% { box-shadow: 0 0 20px rgba(129,140,248,.6); }
}

.mode-tab.active {
  animation: subtlePulse 3s ease-in-out infinite;
}

/* Better Loading States */
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.loading-shimmer {
  background: linear-gradient(90deg, var(--surface-bg) 25%, var(--card-bg) 50%, var(--surface-bg) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

.btn-auth.logged-in .btn-avatar img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }

/* ========== CCF Deadlines View ========== */

/* Full-width when deadlines mode active; hide unrelated UI */
body.mode-deadlines .sidebar { display: none !important; }
body.mode-deadlines .layout { grid-template-columns: 1fr !important; padding: 16px 24px 60px !important; }
body.mode-deadlines .domain-bar { display: none !important; }
body.mode-deadlines #dashboard { display: none !important; }
body.mode-deadlines #paper-list { display: none !important; }
body.mode-deadlines #trending-view { display: none !important; }

.deadlines-view { width: 100%; max-width: 1100px; margin: 0 auto; padding: 1.25rem 0 2rem; overflow-x: hidden; }

/* Page header */
.ddl-page-header {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 1rem; flex-wrap: wrap; margin-bottom: .75rem;
}
.ddl-page-title h2 { font-size: 1.3rem; font-weight: 700; color: var(--text); margin: 0 0 .2rem; }
.ddl-page-desc { font-size: .82rem; color: var(--text-muted); margin: 0; }
.ddl-source-link { color: var(--accent); text-decoration: none; }
.ddl-source-link:hover { text-decoration: underline; }

.ddl-page-controls {
  display: flex; align-items: center; gap: .6rem; flex-wrap: wrap;
}

/* Search */
.ddl-search {
  padding: .35rem .75rem; border-radius: 8px;
  border: 1px solid var(--border); background: var(--surface-bg);
  color: var(--text); font-size: .82rem; width: 180px;
  transition: border-color .2s;
}
.ddl-search:focus { outline: none; border-color: var(--accent); }
.ddl-search::placeholder { color: var(--text-muted); }

/* Rank filter */
.ddl-rank-filter { display: flex; gap: .3rem; }
.ddl-rank-btn {
  padding: .3rem .6rem; border-radius: 6px;
  border: 1px solid var(--border); background: transparent;
  color: var(--text-secondary); font-size: .78rem; font-weight: 500;
  cursor: pointer; transition: all .15s; white-space: nowrap;
}
.ddl-rank-btn:hover { border-color: var(--border-hover); color: var(--text); }
.ddl-rank-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.ddl-rank-btn.rank-a.active { background: #ef4444; border-color: #ef4444; }
.ddl-rank-btn.rank-b.active { background: #f59e0b; border-color: #f59e0b; }
.ddl-rank-btn.rank-c.active { background: #6b7280; border-color: #6b7280; }
.ddl-rank-btn.rank-none.active { background: #9ca3af; border-color: #9ca3af; }

.ddl-hide-expired {
  display: flex; align-items: center; gap: .35rem;
  font-size: .8rem; color: var(--text-secondary);
  cursor: pointer; user-select: none; white-space: nowrap;
}
.ddl-hide-expired input { cursor: pointer; accent-color: var(--accent); }

/* Sub checkbox filter */
.ddl-sub-filter { margin-bottom: 1.1rem; }
.ddl-check-all {
  display: flex; align-items: center; gap: .45rem;
  font-size: .82rem; font-weight: 600; color: var(--text);
  cursor: pointer; margin-bottom: .55rem; user-select: none;
}
.ddl-check-all input { accent-color: var(--accent); width: 15px; height: 15px; cursor: pointer; }
.ddl-sub-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: .35rem .75rem;
}
.ddl-check-label {
  display: flex; align-items: flex-start; gap: .4rem;
  font-size: .78rem; color: var(--text-secondary);
  cursor: pointer; user-select: none; line-height: 1.4;
}
.ddl-check-label input { accent-color: var(--accent); width: 14px; height: 14px; cursor: pointer; flex-shrink: 0; margin-top: 1px; }

/* Card list */
.deadlines-list { display: flex; flex-direction: column; gap: .75rem; }

.ddl-card {
  position: relative;
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: 14px; padding: 1.1rem 1.3rem;
  box-sizing: border-box; width: 100%; min-width: 0;
  box-shadow: 0 1px 2px rgba(0,0,0,.04);
  transition: transform .25s cubic-bezier(.4,0,.2,1),
              box-shadow .25s cubic-bezier(.4,0,.2,1),
              border-color .25s ease;
}
.ddl-card::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0;
  width: 3px; background: var(--accent); opacity: 0;
  border-radius: 14px 0 0 14px;
  transition: opacity .25s ease;
}
.ddl-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 12px 28px -8px rgba(99, 102, 241, .25),
              0 4px 10px -2px rgba(0, 0, 0, .08);
}
.ddl-card:hover::before { opacity: 1; }
.ddl-card:hover .ddl-name { color: var(--accent); }
.ddl-name { transition: color .2s ease; }

/* Urgency accent stripe */
.ddl-card.is-urgent::before { background: #f87171; opacity: .9; }
.ddl-card.is-soon::before   { background: #fbbf24; opacity: .9; }
.ddl-card.is-ok::before     { background: var(--accent); }

.ddl-card-expired { opacity: .55; filter: grayscale(.3); }
.ddl-card-expired::before { background: var(--text-muted) !important; }
.ddl-card-expired:hover { transform: translateY(-1px); border-color: var(--border-hover); }

.deadlines-grid { display: flex; flex-direction: column; gap: .85rem; }
.deadlines-grid > .ddl-card {
  animation: ddl-fade-in .35s cubic-bezier(.4,0,.2,1) backwards;
}
.deadlines-grid > .ddl-card:nth-child(1)  { animation-delay: 0ms; }
.deadlines-grid > .ddl-card:nth-child(2)  { animation-delay: 40ms; }
.deadlines-grid > .ddl-card:nth-child(3)  { animation-delay: 80ms; }
.deadlines-grid > .ddl-card:nth-child(4)  { animation-delay: 120ms; }
.deadlines-grid > .ddl-card:nth-child(5)  { animation-delay: 160ms; }
.deadlines-grid > .ddl-card:nth-child(6)  { animation-delay: 200ms; }
.deadlines-grid > .ddl-card:nth-child(7)  { animation-delay: 240ms; }
.deadlines-grid > .ddl-card:nth-child(8)  { animation-delay: 280ms; }
.deadlines-grid > .ddl-card:nth-child(9)  { animation-delay: 320ms; }
.deadlines-grid > .ddl-card:nth-child(10) { animation-delay: 360ms; }
@keyframes ddl-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Main row: info left + timing right */
.ddl-card-main {
  display: flex; gap: 1.5rem; align-items: flex-start; margin-bottom: .85rem;
}
.ddl-card-info { flex: 1; min-width: 0; }
.ddl-name { font-size: 1.05rem; font-weight: 700; color: var(--text); margin-bottom: .18rem; }
.ddl-year { font-weight: 400; color: var(--text-secondary); }
.ddl-meta { font-size: .78rem; color: var(--text-muted); margin-bottom: .2rem; }
.ddl-fullname { font-size: .82rem; color: var(--text-secondary); margin-bottom: .45rem; }
.ddl-badges { display: flex; gap: .35rem; flex-wrap: wrap; align-items: center; margin-bottom: .3rem; }
.ddl-rank {
  font-size: .72rem; font-weight: 600; padding: .14rem .5rem;
  border-radius: 5px; letter-spacing: .02em;
  background: transparent;
  transition: transform .15s ease, box-shadow .15s ease;
}
.ddl-rank:hover { transform: translateY(-1px); }
.ccf-rank-a { color: #ef4444; border: 1px solid #ef4444; background: rgba(239, 68, 68, .06); }
.ccf-rank-b { color: #3b82f6; border: 1px solid #3b82f6; background: rgba(59, 130, 246, .06); }
.ccf-rank-c { color: #6b7280; border: 1px solid #6b7280; background: rgba(107, 114, 128, .06); }
.ccf-rank-none { color: #9ca3af; border: 1px solid #d1d5db; }
.ddl-sub-tag {
  font-size: .72rem; font-weight: 600; padding: .14rem .5rem;
  border-radius: 5px; background: transparent;
  border: 1px solid var(--border); color: var(--text-muted);
  transition: transform .15s ease;
}
.ddl-sub-tag:hover { transform: translateY(-1px); }
.ddl-sub-plain { font-size: .78rem; color: var(--text-secondary); margin-top: .25rem; }
.ddl-note { font-size: .76rem; color: var(--text-secondary); }
.ddl-note-prefix { color: #3b82f6; font-weight: 700; }

/* Timing panel */
.ddl-card-timing { flex-shrink: 0; text-align: right; min-width: 200px; }
.ddl-countdown {
  font-size: 1.35rem; font-weight: 800; letter-spacing: .03em;
  margin-bottom: .4rem; font-variant-numeric: tabular-nums;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
.ddl-card.is-urgent .ddl-countdown { animation: ddl-pulse 1.6s ease-in-out infinite; }
@keyframes ddl-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .65; }
}
.ddl-ok     { color: #818cf8; }
.ddl-soon   { color: #fbbf24; }
.ddl-urgent { color: #f87171; }
.ddl-expired { color: var(--text-muted); font-size: 1rem; }
.ddl-timing-row {
  font-size: .75rem; color: var(--text-secondary); margin-bottom: .2rem;
  display: flex; gap: .35rem; justify-content: flex-end; align-items: baseline; flex-wrap: wrap;
}
.ddl-label { color: var(--text-muted); font-size: .7rem; white-space: nowrap; }
.ddl-tz { color: var(--text-muted); font-size: .68rem; }
.ddl-site-link { color: var(--accent); text-decoration: none; font-size: .72rem; word-break: break-all; }
.ddl-site-link:hover { text-decoration: underline; }

/* Progress bar */
.ddl-progress { padding-top: .3rem; }
.ddl-pb-track {
  position: relative; height: 4px; border-radius: 4px;
  background: var(--surface-bg); margin-bottom: .4rem; overflow: visible;
}
.ddl-pb-past { position: absolute; left: 0; top: 0; height: 100%; background: var(--text-muted); border-radius: 4px; opacity: .35; }
.ddl-pb-future { position: absolute; top: 0; height: 100%; background: var(--accent); border-radius: 4px; opacity: .65; }

/* Dots with CSS tooltip */
.ddl-pb-dot {
  position: absolute; top: 50%; transform: translate(-50%, -50%);
  width: 11px; height: 11px; border-radius: 50%; border: 2px solid var(--card-bg);
  cursor: pointer;
  box-shadow: 0 0 0 2px rgba(0,0,0,.04);
  transition: transform .15s ease, box-shadow .15s ease;
}
.ddl-pb-dot:hover { transform: translate(-50%, -50%) scale(1.4); box-shadow: 0 0 0 3px rgba(99,102,241,.2); }
.ddl-pb-abstract { background: #f59e0b; }
.ddl-pb-now { background: #818cf8; box-shadow: 0 0 0 4px rgba(129, 140, 248, .25); }
.ddl-pb-end { background: var(--accent) !important; }

/* CSS tooltip via data-tip */
.ddl-pb-dot[data-tip] { position: absolute; }
.ddl-pb-dot[data-tip]::after {
  content: attr(data-tip);
  position: absolute; bottom: calc(100% + 8px); left: 50%; transform: translateX(-50%);
  background: var(--text); color: var(--bg);
  font-size: .65rem; white-space: nowrap;
  padding: .25rem .5rem; border-radius: 5px;
  pointer-events: none; opacity: 0; transition: opacity .15s;
  z-index: 10;
}
.ddl-pb-dot[data-tip]::before {
  content: "";
  position: absolute; bottom: calc(100% + 3px); left: 50%; transform: translateX(-50%);
  border: 4px solid transparent; border-top-color: var(--text);
  pointer-events: none; opacity: 0; transition: opacity .15s;
}
.ddl-pb-dot[data-tip]:hover::after,
.ddl-pb-dot[data-tip]:hover::before,
.ddl-pb-dot[data-tip].tip-active::after,
.ddl-pb-dot[data-tip].tip-active::before { opacity: 1; }

/* Tooltip alignment helpers — prevent overflow at left/right edges */
.ddl-pb-dot.tip-left[data-tip]::after  { left: 0; transform: none; }
.ddl-pb-dot.tip-left[data-tip]::before { left: 4px; transform: none; }
.ddl-pb-dot.tip-right[data-tip]::after  { left: auto; right: 0; transform: none; }
.ddl-pb-dot.tip-right[data-tip]::before { left: auto; right: 4px; transform: none; }

/* End dot tooltip: anchor to the right so it stays inside the viewport */
.ddl-pb-end[data-tip]::after { left: auto; right: 0; transform: none; }
.ddl-pb-end[data-tip]::before { left: auto; right: 4px; transform: none; }

/* End dot label */
.ddl-pb-end-label {
  position: absolute; left: 50%; transform: translateX(-50%);
  top: calc(100% + 5px);
  font-size: .65rem; color: var(--text-muted); white-space: nowrap;
  pointer-events: none;
}


/* Deadlines pagination */
.ddl-pagination,
.paper-pagination {
  display: flex; align-items: center; justify-content: center;
  gap: 1rem; padding: 1.25rem 0 1.5rem;
}
.paper-pagination:empty { display: none; }
/* paper-list 隐藏时（trending / deadlines），分页也跟着隐 */
.paper-list[hidden] + .paper-pagination { display: none; }
.ddl-pg-btn,
.paper-pg-btn {
  padding: .4rem 1rem; border-radius: 6px; font-size: .85rem; font-weight: 500;
  border: 1px solid var(--border); background: var(--card-bg); color: var(--text);
  cursor: pointer; transition: background .15s, border-color .15s;
}
.ddl-pg-btn:hover:not(:disabled),
.paper-pg-btn:hover:not(:disabled) { background: var(--accent); color: #fff; border-color: var(--accent); }
.ddl-pg-btn:disabled,
.paper-pg-btn:disabled { opacity: .35; cursor: default; }
.ddl-pg-btn.active,
.paper-pg-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.ddl-pg-ellipsis,
.paper-pg-ellipsis { font-size: .85rem; color: var(--text-muted); padding: 0 .2rem; line-height: 2; }
.ddl-pg-total,
.paper-pg-total { font-size: .8rem; color: var(--text-muted); margin-left: .5rem; line-height: 2; white-space: nowrap; align-self: center; }

/* 直接跳转输入框 */
.paper-pg-jump { display: inline-flex; align-items: center; gap: .4rem; margin-left: .25rem; }
.paper-pg-jump-label { font-size: .8rem; color: var(--text-muted); }
.paper-pg-input {
  width: 56px; padding: .35rem .5rem; border-radius: 6px; font-size: .85rem;
  border: 1px solid var(--border); background: var(--card-bg); color: var(--text);
  text-align: center; transition: border-color .15s, box-shadow .15s;
  -moz-appearance: textfield; appearance: textfield;
}
.paper-pg-input::-webkit-outer-spin-button,
.paper-pg-input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.paper-pg-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 2px var(--glow-a); }
.paper-pg-input::placeholder { color: var(--text-muted); opacity: .6; }
.paper-pg-go { padding: .35rem .8rem; }

/* About ack */
.about-ack-inline { font-size: .8rem; color: var(--text-muted); margin-top: .5rem; line-height: 1.6; }
.ack-link { color: var(--accent); text-decoration: none; }
.ack-link:hover { text-decoration: underline; }
.deadline-icon { color: #818cf8; }

/* Responsive */
@media (max-width: 900px) {
  .ddl-card-main { flex-direction: column; gap: .75rem; }
  .ddl-card-timing { text-align: left; min-width: 0; }
  .ddl-timing-row { justify-content: flex-start; }
}
@media (max-width: 640px) {
  body.mode-deadlines .layout { padding: 10px 12px 50px !important; }
  .deadlines-view { padding: .75rem 0 1.5rem; }
  .ddl-page-header { flex-direction: column; gap: .75rem; }
  .ddl-page-controls { width: 100%; flex-wrap: wrap; }
  .ddl-search { width: 100%; box-sizing: border-box; }
  .ddl-sub-grid { grid-template-columns: repeat(2, 1fr); }
  .ddl-card { padding: .75rem .875rem; }
  .ddl-card-info { overflow: hidden; }
  .ddl-name { font-size: .95rem; word-break: break-word; }
  .ddl-fullname { word-break: break-word; }
  .ddl-countdown { font-size: 1.05rem; }
  .ddl-timing-row { font-size: .74rem; flex-wrap: wrap; word-break: break-all; }
  .ddl-site-link { word-break: break-all; }
  .ddl-pb-track { overflow: visible; }
  .ddl-pb-dot[data-tip]:hover::after { font-size: .6rem; }
  .ddl-pagination,
  .paper-pagination { gap: .4rem; flex-wrap: wrap; }
  .ddl-pg-btn,
  .paper-pg-btn { padding: .35rem .6rem; font-size: .78rem; min-width: 32px; }
  .paper-pg-jump { gap: .3rem; margin-left: 0; }
  .paper-pg-input { width: 48px; padding: .3rem .4rem; font-size: .78rem; }
  .paper-pg-go { padding: .3rem .6rem; }
}

/* ========== Global theme transition + scrollbar polish ========== */
/* 切换昼夜时，颜色相关的属性平滑过渡，避免硬切闪烁 */
html.theme-switching,
html.theme-switching * {
  transition: background-color .35s ease, color .35s ease,
              border-color .35s ease, box-shadow .35s ease,
              fill .35s ease, stroke .35s ease !important;
}

/* 自定义滚动条 — 与玻璃风格统一 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: content-box;
  transition: background .2s;
}
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.18); background-clip: content-box; }
:root[data-theme="light"] ::-webkit-scrollbar-thumb { background: rgba(0,0,0,.12); background-clip: content-box; }
:root[data-theme="light"] ::-webkit-scrollbar-thumb:hover { background: rgba(0,0,0,.22); background-clip: content-box; }
* { scrollbar-width: thin; scrollbar-color: rgba(255,255,255,0.12) transparent; }
:root[data-theme="light"] * { scrollbar-color: rgba(0,0,0,0.18) transparent; }

/* search 框 focus 高亮升级 */
.search:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(129, 140, 248, 0.15);
}

/* stat-card 数字微动效（数字加载时柔和上浮） */
@keyframes statValueIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.stat-value { animation: statValueIn .5s cubic-bezier(.4,0,.2,1) both; }