/* AILatest Journal · 牛皮纸学术风 (Claude-inspired kraft/paper palette) */
:root {
  --paper:          #f5f1ea;   /* Claude 牛皮纸底色 */
  --paper-soft:     #eee8dc;
  --paper-deeper:   #e5dece;
  --ink:            #2b2a27;
  --ink-soft:       #4a463f;
  --ink-faint:      #6b6559;
  --rule:           #d6cdb7;
  --rule-soft:      #e4dcc7;
  --accent:         #b4531f;   /* terracotta / 朱红 */
  --accent-soft:    #c66933;
  --deep:           #1f2c4c;   /* 学术深蓝 */
  --deep-soft:      #2c3d68;
  --sage:           #5b6a4d;
  --gold:           #a07a2a;
  --crimson:        #7a2020;
  --tag-scie:       #1f3a5f;
  --tag-ssci:       #5b3e1c;
  --tag-ahci:       #5a2b3b;
  --tag-esci:       #3b4f3b;

  --zone-1:         #7a2020;
  --zone-2:         #b4531f;
  --zone-3:         #a07a2a;
  --zone-4:         #6b6559;
  --zone-top:       #1f2c4c;

  --serif: 'Libre Caslon Text', 'EB Garamond', 'Source Serif Pro',
           'Noto Serif SC', 'Songti SC', 'STSong', Georgia, serif;
  --sans:  'Inter', 'PingFang SC', 'Hiragino Sans GB', -apple-system,
           system-ui, sans-serif;
  --mono:  'JetBrains Mono', 'SFMono-Regular', Menlo, monospace;

  --shadow-paper:   0 1px 0 rgba(43,42,39,.04),
                    0 4px 14px rgba(43,42,39,.06);
}

:root[data-theme="dark"] {
  --paper:          #1c1b18;
  --paper-soft:     #252320;
  --paper-deeper:   #2d2a25;
  --ink:            #ece5d3;
  --ink-soft:       #c7bfa9;
  --ink-faint:      #8f8876;
  --rule:           #3c3931;
  --rule-soft:      #2f2c26;
  --accent:         #d78551;
  --accent-soft:    #e49567;
  --deep:           #8fa4d0;
  --deep-soft:      #a9bbdf;
  --sage:           #9fad8c;
  --gold:           #d4a843;
  --crimson:        #cf6c6c;

  --zone-1:         #cf6c6c;
  --zone-2:         #d78551;
  --zone-3:         #d4a843;
  --zone-4:         #a19b89;
  --zone-top:       #a9bbdf;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

/* 纸张纹理：subtle noise + 纤维感 */
body {
  background-image:
    radial-gradient(circle at 20% 20%, rgba(180,83,31,0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(31,44,76,0.03) 0%, transparent 50%),
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.2 0 0 0 0 0.18 0 0 0 0 0.14 0 0 0 0.035 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  background-attachment: fixed;
}

a { color: var(--accent); text-decoration: none; border-bottom: 1px solid transparent; transition: border-color .15s; }
a:hover { border-bottom-color: var(--accent); }

/* ─────────── Layout ─────────── */
body {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

aside.sidebar {
  background: var(--paper-soft);
  border-right: 1px solid var(--rule);
  padding: 28px 22px 20px;
  position: sticky; top: 0;
  height: 100vh;
  overflow-y: auto;
  font-size: 13.5px;
}

main.main {
  min-width: 0;
  padding: 36px 52px 80px;
  max-width: 1280px;
}

/* ─────────── Brand ─────────── */
.brand {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 22px;
  letter-spacing: 0.01em;
  margin: 0 0 6px;
  line-height: 1.15;
  color: var(--ink);
}
.brand a { color: inherit; border: 0; }
.brand span {
  display: block;
  font-style: italic;
  font-weight: 400;
  font-size: 15px;
  color: var(--ink-faint);
  letter-spacing: 0.04em;
  margin-top: 2px;
}
.brand-sub {
  font-size: 11.5px;
  color: var(--ink-faint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--rule);
}

/* ─────────── Side sections ─────────── */
.side-section { margin-bottom: 22px; }
.side-label {
  font-family: var(--serif);
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-faint);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 8px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--rule-soft);
}

.chip-row { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 9px;
  font-size: 11.5px; font-weight: 600;
  letter-spacing: 0.04em;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 2px;
  color: var(--ink-soft);
  cursor: pointer;
  transition: all .15s;
  user-select: none;
}
.chip input { position: absolute; opacity: 0; pointer-events: none; }
.chip:has(input:checked) {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.chip.tag-scie:has(input:checked) { background: var(--tag-scie); border-color: var(--tag-scie); }
.chip.tag-ssci:has(input:checked) { background: var(--tag-ssci); border-color: var(--tag-ssci); }
.chip.tag-ahci:has(input:checked) { background: var(--tag-ahci); border-color: var(--tag-ahci); }
.chip.tag-esci:has(input:checked) { background: var(--tag-esci); border-color: var(--tag-esci); }
.chip.zone-1:has(input:checked) { background: var(--zone-1); border-color: var(--zone-1); color: #fff; }
.chip.zone-2:has(input:checked) { background: var(--zone-2); border-color: var(--zone-2); color: #fff; }
.chip.zone-3:has(input:checked) { background: var(--zone-3); border-color: var(--zone-3); color: #fff; }
.chip.zone-4:has(input:checked) { background: var(--zone-4); border-color: var(--zone-4); color: #fff; }
.chip.zone-top:has(input:checked) { background: var(--zone-top); border-color: var(--zone-top); color: #fff; }

/* cat 列表：书页目录感 */
.nav { display: flex; flex-direction: column; gap: 1px; }
.nav-item {
  font: inherit;
  font-family: var(--serif);
  text-align: left;
  background: transparent;
  border: 0;
  padding: 5px 4px;
  color: var(--ink-soft);
  cursor: pointer;
  font-size: 13px;
  display: flex; justify-content: space-between; align-items: baseline;
  border-bottom: 1px dotted transparent;
  transition: all .12s;
}
.nav-item:hover { color: var(--accent); border-bottom-color: var(--rule-soft); }
.nav-item.active { color: var(--accent); font-weight: 600; }
.nav-item .count {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-faint);
  font-weight: 400;
}

.aside-foot {
  margin-top: 28px; padding-top: 14px;
  border-top: 1px solid var(--rule);
  font-size: 11.5px;
  color: var(--ink-faint);
  letter-spacing: 0.04em;
}
.aside-foot a { color: var(--ink-faint); }

/* ─────────── Top bar & tabs ─────────── */
.tabs {
  display: flex; gap: 0;
  margin: -8px -52px 28px;
  padding: 0 52px;
  border-bottom: 2px solid var(--rule);
}
.tab {
  font-family: var(--serif);
  font-size: 14.5px;
  padding: 10px 18px;
  background: transparent;
  border: 0;
  color: var(--ink-faint);
  cursor: pointer;
  letter-spacing: 0.03em;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all .15s;
}
.tab:hover { color: var(--accent); }
.tab.active {
  color: var(--ink);
  font-weight: 600;
  border-bottom-color: var(--accent);
}

.topbar {
  display: flex; align-items: center; gap: 16px;
  margin-bottom: 22px;
}
.search-wrap { flex: 1; position: relative; }
.search-wrap input {
  width: 100%;
  background: var(--paper-soft);
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 11px 14px;
  font-family: var(--serif);
  font-size: 15px;
  color: var(--ink);
  outline: 0;
  transition: all .15s;
}
.search-wrap input:focus {
  border-color: var(--accent);
  background: var(--paper);
  box-shadow: 0 0 0 3px rgba(180,83,31,0.08);
}
.hint {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-faint);
  margin-left: 4px;
  letter-spacing: 0.04em;
}
.topbar-actions {
  display: flex; align-items: center; gap: 8px;
}
.lang-toggle,
.auth-btn,
.fav-tab {
  font-family: var(--serif); font-size: 13px;
  background: transparent; border: 1px solid var(--rule);
  padding: 6px 12px; border-radius: 2px;
  cursor: pointer; color: var(--ink-soft);
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.lang-toggle:hover,
.auth-btn:hover,
.fav-tab:hover { border-color: var(--accent); color: var(--accent); }
.fav-tab {
  color: var(--accent);
  border-color: var(--rule);
}
.fav-tab #fav-count {
  display: inline-block;
  min-width: 18px;
  padding: 1px 5px;
  font-family: var(--mono);
  font-size: 10px;
  margin-left: 2px;
  background: var(--accent);
  color: var(--paper);
  border-radius: 9px;
  line-height: 1.2;
}

/* favorite star button on row */
.fav-star {
  background: transparent;
  border: 0;
  font-size: 18px;
  line-height: 1;
  padding: 2px 6px;
  color: var(--ink-faint);
  cursor: pointer;
  transition: color .12s;
}
.fav-star:hover { color: var(--accent); }
.fav-star.on { color: var(--gold); }

.col-fav { width: 36px; text-align: center; }


/* ─────────── Hero ─────────── */
.hero {
  background: var(--paper-soft);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  padding: 22px 28px;
  margin-bottom: 28px;
  border-radius: 0;
  position: relative;
}
.hero::before {
  content: "";
  position: absolute;
  top: 8px; right: 8px; bottom: 8px; left: 8px;
  border: 1px solid var(--rule-soft);
  pointer-events: none;
  z-index: 0;
}
.hero > * { position: relative; z-index: 1; }
.hero h2 {
  font-family: var(--serif);
  font-size: 22px; font-weight: 600;
  margin: 0 0 10px;
  color: var(--ink);
  letter-spacing: 0.01em;
}
.hero h2::after {
  content: ""; display: block;
  width: 36px; height: 1px;
  background: var(--accent);
  margin-top: 8px;
}
.hero p {
  margin: 0;
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.65;
}
.hero b { font-weight: 600; color: var(--ink); }
.hero .muted { font-size: 12.5px; color: var(--ink-faint); font-style: italic; }

/* ─────────── Results ─────────── */
.results-head {
  display: flex; align-items: baseline; gap: 12px;
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--rule);
}
.results-head h3 {
  font-family: var(--serif);
  font-size: 16px; font-weight: 600;
  margin: 0;
  letter-spacing: 0.02em;
}
.results-count {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-faint);
}

.table-wrap {
  overflow-x: auto;
  background: var(--paper-soft);
  border: 1px solid var(--rule);
}

table.journals {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}
table.journals th {
  font-family: var(--serif);
  font-weight: 600;
  text-align: left;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  padding: 10px 12px;
  background: var(--paper-deeper);
  border-bottom: 1px solid var(--rule);
  white-space: nowrap;
}
table.journals td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--rule-soft);
  vertical-align: top;
}
table.journals tr:hover td { background: var(--paper); }
table.journals tr:last-child td { border-bottom: 0; }

.jname {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 14.5px;
  color: var(--ink);
  line-height: 1.35;
}
.jname-cn {
  display: block;
  font-weight: 400;
  font-size: 12.5px;
  color: var(--ink-faint);
  margin-top: 2px;
  font-style: italic;
}
.jabbr {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-faint);
  letter-spacing: 0.02em;
}
.jissn {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-soft);
  white-space: nowrap;
}
.jissn .eissn { color: var(--ink-faint); }

/* 徽章 */
.badges { display: flex; flex-wrap: wrap; gap: 4px; }
.badge {
  display: inline-flex; align-items: center;
  padding: 2px 7px;
  font-family: var(--sans);
  font-size: 10.5px; font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: 2px;
  border: 1px solid;
  white-space: nowrap;
}
.badge.b-scie { color: var(--tag-scie); border-color: var(--tag-scie); background: rgba(31,58,95,0.05); }
.badge.b-ssci { color: var(--tag-ssci); border-color: var(--tag-ssci); background: rgba(91,62,28,0.05); }
.badge.b-ahci { color: var(--tag-ahci); border-color: var(--tag-ahci); background: rgba(90,43,59,0.05); }
.badge.b-esci { color: var(--tag-esci); border-color: var(--tag-esci); background: rgba(59,79,59,0.05); }

.zone {
  display: inline-flex; align-items: baseline; gap: 2px;
  padding: 2px 6px;
  font-family: var(--serif);
  font-size: 11.5px; font-weight: 700;
  border-radius: 2px;
  color: #fff;
}
.zone.z1 { background: var(--zone-1); }
.zone.z2 { background: var(--zone-2); }
.zone.z3 { background: var(--zone-3); }
.zone.z4 { background: var(--zone-4); }
.zone.ztop { background: var(--zone-top); font-size: 10.5px; letter-spacing: 0.06em; }
.zone sup { font-size: 8px; font-weight: 400; opacity: 0.8; }

.if-pill {
  display: inline-block;
  padding: 2px 7px;
  font-family: var(--mono);
  font-size: 11.5px; font-weight: 700;
  background: var(--gold);
  color: #fff;
  border-radius: 2px;
  letter-spacing: 0.02em;
}
.if-pill.iq-Q1 { background: var(--zone-1); }
.if-pill.iq-Q2 { background: var(--zone-2); }
.if-pill.iq-Q3 { background: var(--zone-3); }
.if-pill.iq-Q4 { background: var(--zone-4); }

.ccf-pill {
  display: inline-block;
  padding: 2px 6px;
  font-family: var(--serif);
  font-size: 11px; font-weight: 700;
  background: var(--deep);
  color: #fff;
  border-radius: 2px;
  letter-spacing: 0.06em;
}
.ccf-pill.ccf-A { background: var(--crimson); }
.ccf-pill.ccf-B { background: var(--accent); }
.ccf-pill.ccf-C { background: var(--sage); }

.tier-pill {
  display: inline-block;
  padding: 2px 6px;
  font-family: var(--serif);
  font-size: 11px; font-weight: 700;
  background: var(--deep);
  color: #fff;
  border-radius: 2px;
  letter-spacing: 0.06em;
}
.tier-pill.t1 { background: var(--crimson); }
.tier-pill.t2 { background: var(--accent); }
.tier-pill.t3 { background: var(--sage); }

.warn-pill {
  display: inline-block;
  padding: 2px 7px;
  font-family: var(--serif);
  font-size: 11px; font-weight: 700;
  background: var(--crimson);
  color: #fff;
  border-radius: 2px;
}

.muted-cell {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-faint);
}

/* pager */
.pager {
  margin-top: 18px;
  text-align: center;
}
.pager button {
  font-family: var(--serif);
  font-size: 13.5px;
  background: var(--paper-soft);
  border: 1px solid var(--rule);
  padding: 8px 18px;
  color: var(--ink-soft);
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: all .15s;
}
.pager button:hover { background: var(--paper); color: var(--accent); border-color: var(--accent); }

/* site-foot */
.site-foot {
  margin-top: 40px; padding-top: 18px;
  border-top: 1px solid var(--rule);
  font-size: 12px; color: var(--ink-faint);
  font-style: italic;
  letter-spacing: 0.02em;
}

/* theme toggle */
.theme-toggle {
  position: fixed; right: 18px; bottom: 18px;
  width: 40px; height: 40px;
  border: 1px solid var(--rule);
  background: var(--paper-soft);
  border-radius: 50%;
  cursor: pointer;
  font-size: 16px;
  box-shadow: var(--shadow-paper);
  z-index: 99;
}
.theme-toggle:hover { border-color: var(--accent); }

/* empty state */
.empty {
  padding: 50px 20px;
  text-align: center;
  font-family: var(--serif);
  font-style: italic;
  color: var(--ink-faint);
  font-size: 14px;
}

/* Domestic tab sections */
.section-block { margin-bottom: 34px; }
.section-title {
  font-family: var(--serif);
  font-size: 17px; font-weight: 600;
  margin: 0 0 4px;
  letter-spacing: 0.02em;
}
.section-title::after {
  content: ""; display: block;
  width: 28px; height: 1px;
  background: var(--accent);
  margin-top: 6px;
}
.section-subtitle {
  font-family: var(--serif);
  font-style: italic;
  font-size: 13px;
  color: var(--ink-faint);
  margin: 8px 0 14px;
}

.domain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 8px;
  margin-top: 14px;
}
.domain-card {
  padding: 12px 14px;
  background: var(--paper-soft);
  border: 1px solid var(--rule);
  cursor: pointer;
  transition: all .15s;
}
.domain-card:hover {
  background: var(--paper);
  border-color: var(--accent);
}
.domain-card .d-name {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 14px;
  color: var(--ink);
}
.domain-card .d-count {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: 0.04em;
  margin-top: 4px;
}

/* responsive */
@media (max-width: 900px) {
  body { grid-template-columns: 1fr; }
  aside.sidebar {
    position: static; height: auto;
    border-right: 0; border-bottom: 1px solid var(--rule);
  }
  main.main { padding: 24px 20px 60px; }
  .tabs { margin: -8px -20px 20px; padding: 0 20px; }
}