/* ── Variables & Reset ── */

:root {
  --ink: #1d1d1f;
  --ink-2: #6e6e73;
  --ink-3: #8e8e93;
  --line: #e3e3e5;
  --line-soft: #f0f0f2;
  --bg: #ffffff;
  --bg-soft: #fafafa;
  --bg-side: #f7f7f8;
  --bg-hover: #efeff1;
  --bg-active: #e6e6e9;
  --accent: #0a5c9e;
  --accent-soft: #eef4fa;
  --open: #1d6b3f;
  --warn: #a8442a;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", Georgia, serif;
  --mono: "SF Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
  --side-w: 236px;
  --side-w-collapsed: 64px;
  --wrap: 880px;
  --bg-err: #fdf5f2;
  --border-err: #f0d8d0;
  --bg-ok: #f2f9f4;
  --border-ok: #bcd9c6;
  --bg-warn: #fef7e8;
  --border-warn: #f0e8d0;
  --warn-text: #8a6d00;
  --mark-bg: #dbe9f7;
  --mark-text: #0a4a7d;
  --accent-hover: #0a5188;
  --line-hover: #c9c9cc;
  --placeholder: #b8b8bd;
  --select-chevron: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%236e6e73' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 4.5 6 7.5 9 4.5'/%3E%3C/svg%3E");
  --shadow-seg: 0 1px 3px rgba(0, 0, 0, .08);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; color-scheme: light; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.65;
}

a { color: inherit; text-decoration: none; }

code { font-family: var(--mono); font-size: .92em; }

.field {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.field__label {
  font-size: 12.5px;
  color: var(--ink-2);
  font-weight: 500;
}

select {
  appearance: none;
  font: inherit;
  font-size: 13px;
  color: var(--ink);
  height: 34px;
  padding: 0 28px 0 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background-color: var(--bg);
  background-image: var(--select-chevron);
  background-repeat: no-repeat;
  background-position: right 8px center;
  background-size: 12px 12px;
  outline: none;
  cursor: pointer;
  transition: border-color .15s ease;
}

select:hover { border-color: var(--line-hover); }

select:focus { border-color: var(--accent); }

.field select { width: 100%; min-width: 140px; }

.ph-search,
.math-search input,
.errors-search input {
  width: 100%;
  height: 46px;
  padding: 0 16px;
  font: inherit;
  font-size: 15px;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  outline: none;
  transition: border-color .15s ease;
}

.ph-search:hover,
.math-search input:hover,
.errors-search input:hover,
.query input:hover { border-color: var(--line-hover); }

.ph-search:focus,
.math-search input:focus,
.errors-search input:focus { border-color: var(--accent); }

.ph-search::placeholder,
.math-search input::placeholder,
.errors-search input::placeholder { color: var(--placeholder); }

.bib-form textarea,
.mix-input,
.escape-input,
.table-input textarea,
.citecmd-input,
.refcheck-input {
  width: 100%;
  resize: vertical;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 16px;
  outline: none;
  transition: border-color .15s ease;
}

.bib-form textarea:hover,
.mix-input:hover,
.escape-input:hover,
.table-input textarea:hover,
.citecmd-input:hover,
.refcheck-input:hover { border-color: var(--line-hover); }

.bib-form textarea:focus,
.mix-input:focus,
.escape-input:focus,
.table-input textarea:focus,
.citecmd-input:focus,
.refcheck-input:focus { border-color: var(--accent); }

.bib-form textarea::placeholder,
.mix-input::placeholder,
.escape-input::placeholder,
.table-input textarea::placeholder,
.citecmd-input::placeholder,
.refcheck-input::placeholder { color: var(--placeholder); }

.bib-form textarea,
.escape-input,
.table-input textarea,
.citecmd-input,
.refcheck-input {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.75;
}


/* ── Layout ── */

.app { display: flex; min-height: 100vh; }

.sidebar {
  flex: 0 0 var(--side-w);
  width: var(--side-w);
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 16px 14px;
  background: var(--bg-side);
  border-right: 1px solid var(--line);
  overflow: hidden;
  transition: flex-basis .18s ease, width .18s ease;
}

.sidebar__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  height: 32px;
  flex: 0 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
}

.logo__mark {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--accent);
  color: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo__text {
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: .2px;
  white-space: nowrap;
  overflow: hidden;
}

.sidebar__collapse {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border: 0;
  border-radius: 7px;
  background: none;
  color: var(--ink-3);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: .32;
  transition: opacity .15s ease, background-color .15s ease, color .15s ease;
}

.sidebar:hover .sidebar__collapse { opacity: 1; }

.sidebar__collapse:hover { background: var(--bg-hover); color: var(--ink); }

.sidebar__rule {
  flex: 0 0 auto;
  height: 1px;
  background: var(--line);
}

.sidebar__nav {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 0 -4px;
  padding: 0 4px;
  scrollbar-width: thin;
}

.sidebar__nav::-webkit-scrollbar { width: 6px; }

.sidebar__nav::-webkit-scrollbar-track { background: transparent; }

.sidebar__nav::-webkit-scrollbar-thumb { background: var(--line-hover); border-radius: 3px; }

.nav-group {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-group__title {
  padding: 6px 8px 4px;
  font-size: 10.5px;
  letter-spacing: .06em;
  color: var(--ink-3);
  white-space: nowrap;
  overflow: hidden;
}

html[data-sidebar="collapsed"] .nav-group__title,
.sidebar.is-collapsed .nav-group__title { display: none; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 32px;
  padding: 0 8px 0 5px;
  border-radius: 8px;
  font-size: 12.5px;
  color: var(--ink-2);
  transition: background-color .12s ease, color .12s ease;
}

.nav-item__ico {
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-item__text {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-item__badge {
  margin-left: auto;
  flex: 0 0 auto;
  font-size: 10.5px;
  color: var(--ink-3);
}

a.nav-item:hover { background: var(--bg-hover); color: var(--ink); }

.nav-item.is-active {
  background: var(--bg-active);
  color: var(--ink);
  font-weight: 500;
}

.nav-item--soon { opacity: .52; cursor: default; }

.sidebar__foot {
  flex: 0 0 auto;
  margin-top: auto;
  padding-top: 4px;
}

.sidebar__note {
  margin: 0;
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--ink-3);
}

.sidebar__theme {
  display: flex;
  align-items: center;
  gap: 7px;
  width: 100%;
  padding: 7px 8px;
  margin-bottom: 8px;
  border: 0;
  border-radius: 7px;
  background: none;
  color: var(--ink-2);
  font: inherit;
  font-size: 12px;
  cursor: pointer;
  transition: background-color .12s ease, color .12s ease;
}

.sidebar__theme:hover { background: var(--bg-hover); color: var(--ink); }

.sidebar__theme svg { flex: 0 0 auto; }

.sidebar__theme-label { white-space: nowrap; }

html[data-sidebar="collapsed"] .sidebar__theme-label,
.sidebar.is-collapsed .sidebar__theme-label { display: none; }

html[data-sidebar="collapsed"] .sidebar__theme,
.sidebar.is-collapsed .sidebar__theme { justify-content: center; padding: 7px 0; }

html[data-sidebar="collapsed"] .sidebar,
.sidebar.is-collapsed {
  flex-basis: var(--side-w-collapsed);
  width: var(--side-w-collapsed);
  padding-left: 10px;
  padding-right: 10px;
}

/* 首屏只靠 html 属性折叠时关掉过渡，避免从展开宽度动画过来 */
html[data-sidebar="collapsed"] .sidebar:not(.is-collapsed) { transition: none; }

html[data-sidebar="collapsed"] .sidebar__head,
.sidebar.is-collapsed .sidebar__head { justify-content: center; }

html[data-sidebar="collapsed"] .logo,
.sidebar.is-collapsed .logo { display: none; }

html[data-sidebar="collapsed"] .sidebar__collapse,
.sidebar.is-collapsed .sidebar__collapse { opacity: 1; }

html[data-sidebar="collapsed"] .logo__text,
html[data-sidebar="collapsed"] .nav-item__text,
html[data-sidebar="collapsed"] .nav-item__badge,
html[data-sidebar="collapsed"] .sidebar__note,
.sidebar.is-collapsed .logo__text,
.sidebar.is-collapsed .nav-item__text,
.sidebar.is-collapsed .nav-item__badge,
.sidebar.is-collapsed .sidebar__note { display: none; }

html[data-sidebar="collapsed"] .nav-item,
.sidebar.is-collapsed .nav-item {
  justify-content: center;
  padding: 0;
}

html[data-sidebar="collapsed"] .sidebar__nav,
.sidebar.is-collapsed .sidebar__nav { margin: 0; padding: 0; }


/* ── Mobile drawer ── */

.scrim {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .26);
  z-index: 50;
}

.main { flex: 1 1 auto; min-width: 0; }


/* ── Mobile bar ── */

.mobile-bar { display: none; }

.content { padding-bottom: 20px; }

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 32px;
}

.hero { padding-top: 52px; padding-bottom: 30px; }

.hero h1 {
  margin: 0 0 14px;
  font-family: var(--serif);
  font-size: 32px;
  font-weight: 500;
  letter-spacing: -.2px;
  line-height: 1.3;
}

.hero p {
  margin: 0;
  max-width: 640px;
  color: var(--ink-2);
  font-size: 14px;
  line-height: 1.75;
}

.hero strong { font-weight: 500; color: var(--ink); }


/* ── Query form ── */

.query { display: flex; gap: 10px; }

.query input {
  flex: 1 1 auto;
  min-width: 0;
  font: inherit;
  font-size: 15px;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0 16px;
  height: 50px;
  outline: none;
  transition: border-color .15s ease;
}

.query input:focus { border-color: var(--accent); }

.query input::placeholder { color: var(--placeholder); }

.btn {
  appearance: none;
  font: inherit;
  font-size: 14px;
  height: 50px;
  padding: 0 24px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  cursor: pointer;
  white-space: nowrap;
  transition: background-color .15s ease, border-color .15s ease;
}

.btn:hover { border-color: var(--line-hover); }

.btn--accent { background: var(--accent); border-color: var(--accent); color: var(--bg); }

.btn--accent:hover { background: var(--accent-hover); border-color: var(--accent-hover); }

.btn--ghost { background: var(--bg); color: var(--ink-2); }

.btn[disabled] { opacity: .5; cursor: default; }

.query__note {
  margin: 12px 0 0;
  font-size: 12.5px;
  color: var(--ink-3);
}


/* ── Status & Candidates ── */

.status {
  margin-top: 26px;
  padding: 14px 16px;
  border-radius: 10px;
  font-size: 13.5px;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  color: var(--ink-2);
}

.status--error { border-color: var(--border-err); background: var(--bg-err); color: var(--warn); }

.candidates { margin-top: 26px; }

.candidates__title {
  font-size: 13px;
  color: var(--ink-3);
  margin-bottom: 10px;
}

.candidate {
  display: block;
  width: 100%;
  text-align: left;
  font: inherit;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
  cursor: pointer;
  margin-bottom: 8px;
  transition: border-color .15s ease, background-color .15s ease;
}

.candidate:hover { border-color: var(--accent); background: var(--accent-soft); }

.candidate__title { font-size: 14px; font-weight: 500; line-height: 1.5; }

.candidate__exact {
  font-size: 11px;
  font-weight: 400;
  color: var(--open);
  margin-left: 8px;
  white-space: nowrap;
}

.candidate__meta { font-size: 12px; color: var(--ink-3); margin-top: 5px; font-family: var(--mono); }


/* ── Record display ── */

.record {
  margin-top: 34px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.record h2 {
  margin: 0 0 12px;
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 500;
  line-height: 1.45;
}

.record__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  font-size: 13px;
  color: var(--ink-2);
}

.record__doi { font-family: var(--mono); font-size: 12.5px; color: var(--ink-3); }

.formats { margin-top: 6px; }

.fmt { margin-top: 26px; }

.fmt__head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 9px;
}

.fmt__label { font-size: 14px; font-weight: 500; }

.fmt__hint { font-size: 12px; color: var(--ink-3); flex: 1 1 auto; }

.copy {
  appearance: none;
  font: inherit;
  font-size: 12px;
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--ink-2);
  cursor: pointer;
  transition: border-color .15s ease, color .15s ease, background-color .15s ease;
}

.copy:hover { border-color: var(--ink-3); color: var(--ink); }

.copy--done { border-color: var(--border-ok); background: var(--bg-ok); color: var(--open); }

.fmt__code {
  margin: 0;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.8;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 15px 17px;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
}


/* ── Notes & Footer ── */

.notes { margin-top: 56px; }

.notes h2 {
  margin: 0 0 14px;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 500;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.notes ul {
  margin: 0;
  padding-left: 20px;
  font-size: 13.5px;
  color: var(--ink-2);
  line-height: 1.85;
}

.notes li { margin-bottom: 7px; }

.site-foot {
  margin-top: 48px;
  border-top: 1px solid var(--line);
  padding-top: 26px;
  padding-bottom: 48px;
  font-size: 12px;
  color: var(--ink-3);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.foot-nav { display: flex; gap: 16px; flex-wrap: wrap; }

.foot-nav a:hover { color: var(--ink-2); }


/* ── BibTeX form ── */

.bib-form { display: flex; flex-direction: column; gap: 12px; }

.bib-form textarea { min-height: 280px; }

.bib-form__bar {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  flex-wrap: wrap;
}

.bib-form__spacer { flex: 1 1 auto; }

.bib-form .btn { height: 34px; padding: 0 16px; font-size: 13px; }


/* ── Field inputs ── */

.field input[type="number"] {
  appearance: textfield;
  font: inherit;
  font-size: 13px;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 7px 10px;
  height: 34px;
  width: 72px;
  outline: none;
  transition: border-color .15s ease;
}

.field input[type="number"]:hover { border-color: var(--line-hover); }
.field input[type="number"]:focus { border-color: var(--accent); }


/* ── BibTeX result ── */

.bib-result__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 30px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink-2);
}

.bib-result__head strong { font-weight: 500; color: var(--ink); }


/* ── BibTeX warnings ── */

.bib-warn {
  margin: 14px 0 0;
  padding: 12px 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--warn);
  background: var(--bg-err);
  border: 1px solid var(--border-err);
  border-radius: 9px;
}


/* ── BibTeX items ── */

.bib-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
}

.bib-item:last-child { border-bottom: none; }

.bib-item__body { flex: 1 1 auto; min-width: 0; }

.bib-item__text {
  font-size: 14px;
  line-height: 1.75;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.bib-item__key {
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
}

.bib-item .copy { flex: 0 0 auto; margin-top: 2px; }


/* ── Options grid ── */

.opts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px 32px;
  margin-bottom: 18px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
}


/* ── Option items ── */

.opt {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  padding: 7px 0;
  cursor: pointer;
}

.opt input[type="checkbox"] {
  flex: 0 0 auto;
  margin: 4px 0 0;
  accent-color: var(--accent);
  cursor: pointer;
}

.opt__body {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.opt__label { font-size: 13.5px; color: var(--ink); }

.opt__hint {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-3);
  line-height: 1.5;
}


/* ── Mixed text input ── */

.mix-input {
  min-height: 190px;
  font-family: var(--sans);
  font-size: 14.5px;
  line-height: 1.8;
}


/* ── Mixed text result ── */

.mix-result__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 28px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink-2);
}

.mix-result__head strong { font-weight: 500; color: var(--ink); }

.mix-result__body {
  margin-top: 16px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
  font-size: 14.5px;
  line-height: 1.9;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.mix-result__body mark {
  background: var(--mark-bg);
  color: var(--mark-text);
  border-radius: 3px;
  padding: 0 1px;
}

.mix-empty {
  margin: 28px 0 0;
  padding: 36px 0;
  text-align: center;
  color: var(--ink-3);
  font-size: 13.5px;
}

.copy[disabled] { opacity: .4; cursor: default; }

.copy[disabled]:hover { border-color: var(--line); color: var(--ink-2); }


/* ── Responsive: tablet ── */

@media (max-width: 1024px) {
  .wrap { padding: 0 28px; }
}


/* ── Responsive: mobile ── */

@media (max-width: 900px) {
  .app { display: block; }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 60;
    width: var(--side-w);
    flex-basis: var(--side-w);
    transform: translateX(-100%);
    transition: transform .2s ease, box-shadow .2s ease;
    padding: 16px 14px;
  }

  .sidebar.is-open {
    transform: none;
    box-shadow: 0 0 48px rgba(0, 0, 0, .12);
  }

  html[data-sidebar="collapsed"] .sidebar,
  .sidebar.is-collapsed {
    width: var(--side-w);
    flex-basis: var(--side-w);
    padding: 16px 14px;
  }

  html[data-sidebar="collapsed"] .logo,
  .sidebar.is-collapsed .logo { display: flex; }

  html[data-sidebar="collapsed"] .logo__text,
  html[data-sidebar="collapsed"] .nav-item__text,
  html[data-sidebar="collapsed"] .nav-item__badge,
  html[data-sidebar="collapsed"] .sidebar__note,
  html[data-sidebar="collapsed"] .nav-group__title,
  .sidebar.is-collapsed .logo__text,
  .sidebar.is-collapsed .nav-item__text,
  .sidebar.is-collapsed .nav-item__badge,
  .sidebar.is-collapsed .sidebar__note,
  .sidebar.is-collapsed .nav-group__title { display: revert; }

  html[data-sidebar="collapsed"] .sidebar__head,
  .sidebar.is-collapsed .sidebar__head { justify-content: space-between; }

  html[data-sidebar="collapsed"] .nav-item,
  .sidebar.is-collapsed .nav-item { justify-content: flex-start; padding: 0 8px 0 5px; }

  html[data-sidebar="collapsed"] .sidebar__theme,
  .sidebar.is-collapsed .sidebar__theme { justify-content: flex-start; padding: 7px 8px; }

  html[data-sidebar="collapsed"] .sidebar__theme-label { display: unset; }

  .sidebar__collapse { display: none; }

  .mobile-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    height: 54px;
    padding: 0 20px;
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
    z-index: 40;
    background: var(--bg-side);
    backdrop-filter: saturate(180%) blur(12px);
  }

  .mobile-bar__toggle {
    width: 32px;
    height: 32px;
    margin-left: -6px;
    border: 0;
    border-radius: 8px;
    background: none;
    color: var(--ink);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .mobile-bar__toggle:hover { background: var(--bg-hover); }

  .mobile-bar__title { font-family: var(--serif); font-size: 15px; font-weight: 500; }
}


/* ── Responsive: small ── */

@media (max-width: 640px) {
  .wrap { padding: 0 20px; }
  .hero { padding-top: 34px; padding-bottom: 24px; }
  .hero h1 { font-size: 25px; }
  .query { flex-direction: column; }
  .query input, .btn { width: 100%; height: 46px; }
  .fmt__head { flex-wrap: wrap; }
  .fmt__hint { flex: 1 1 100%; order: 3; }
  .site-foot { flex-direction: column; gap: 8px; }
  .bib-form textarea { min-height: 200px; }
  .bib-form__bar { gap: 10px; }
  .bib-form__bar .field { flex: 1 1 calc(50% - 5px); min-width: 0; }
  .bib-form__bar .field select { width: 100%; }
  .bib-form__spacer { display: none; }
  #clear, #submit { flex: 1 1 calc(50% - 5px); width: auto; height: 42px; }
  .bib-item { gap: 12px; }
  .opts { grid-template-columns: minmax(0, 1fr); gap: 0 0; padding: 12px 14px; }
}


/* ── Word count ── */

.wc-input { min-height: 250px; }

.wc-params {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  padding: 12px 0 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 24px;
}

.wc-param {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  color: var(--ink-2);
}

.wc-param__k { color: var(--ink-3); }

.wc-param__u { color: var(--ink-3); }

.wc-inp {
  width: 76px;
  height: 34px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--ink);
  font: inherit;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  outline: none;
  transition: border-color .15s ease;
}

.wc-inp:hover { border-color: var(--line-hover); }
.wc-inp:focus { border-color: var(--accent); }

.wc-inp--w { width: 64px; }

.wc-main { padding: 2px 0 16px; }

.wc-main__figure { display: flex; align-items: baseline; gap: 8px; }

.wc-main__num {
  font-family: var(--serif);
  font-size: 52px;
  line-height: 1.05;
  letter-spacing: -1.5px;
  font-variant-numeric: tabular-nums;
}

.wc-main__unit { font-size: 15px; color: var(--ink-3); }

.wc-main__sub { margin: 8px 0 0; font-size: 12.5px; color: var(--ink-3); }

.wc-target { margin-top: 15px; max-width: 460px; }

.wc-bar {
  height: 5px;
  border-radius: 3px;
  background: var(--line-soft);
  overflow: hidden;
}

.wc-bar span {
  display: block;
  height: 100%;
  border-radius: 3px;
  background: var(--accent);
  transition: width .2s ease;
}

.wc-bar.is-over span { background: var(--warn); }

.wc-target__text {
  margin-top: 7px;
  font-size: 12px;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}

.wc-target__text strong { color: var(--warn); font-weight: 500; }

.wc-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
}

.wc-metric {
  padding: 12px 13px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
  color: var(--ink);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: border-color .15s ease, background-color .15s ease;
}

.wc-metric:hover { border-color: var(--line-hover); }

.wc-metric.is-on { border-color: var(--accent); background: var(--accent-soft); }

.wc-metric__v {
  display: block;
  font-size: 19px;
  letter-spacing: -.4px;
  font-variant-numeric: tabular-nums;
}

.wc-metric.is-on .wc-metric__v { color: var(--accent); }

.wc-metric__k {
  display: block;
  margin-top: 3px;
  font-size: 11.5px;
  line-height: 1.35;
  color: var(--ink-3);
}

.wc-h2 {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
  margin: 36px 0 2px;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 500;
}

.wc-h2__note {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 400;
  color: var(--ink-3);
}

.wc-scroll { overflow-x: auto; }

.wc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}

.wc-table th {
  padding: 10px 8px;
  border-bottom: 1px solid var(--line);
  font-size: 11.5px;
  font-weight: 400;
  color: var(--ink-3);
  text-align: left;
  white-space: nowrap;
}

.wc-table td {
  padding: 12px 8px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: middle;
}

.wc-table tr.is-off { color: var(--ink-3); }

.wc-table__name { min-width: 150px; }

.wc-table__meta {
  display: block;
  margin-top: 2px;
  font-size: 11.5px;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}

.wc-table input[type="checkbox"] {
  width: 15px;
  height: 15px;
  accent-color: var(--accent);
  cursor: pointer;
}

.wc-num {
  text-align: right;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.wc-dim { color: var(--ink-3); }

.wc-ctr { width: 56px; text-align: center; }

.wc-note {
  margin: 10px 0 0;
  font-size: 12px;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}

.wc-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 12px;
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  background: var(--line-soft);
  overflow: hidden;
}

.wc-cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 13px 14px;
  background: var(--bg);
}

.wc-cell__k { font-size: 11.5px; color: var(--ink-3); }

.wc-cell__v {
  font-size: 17px;
  letter-spacing: -.3px;
  font-variant-numeric: tabular-nums;
}

.wc-actions { margin-top: 26px; }

@media (max-width: 900px) {
  .wc-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .wc-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .wc-input { min-height: 180px; }
  .wc-main__num { font-size: 42px; letter-spacing: -1px; }
  .wc-params { gap: 10px 14px; }
  .wc-param { flex: 1 1 auto; }
  .wc-inp { width: 66px; }
  .wc-table__name { min-width: 0; }
  .wc-table th, .wc-table td { padding-left: 4px; padding-right: 4px; }
  .wc-ctr { width: 44px; }
}

/* ── 特殊字符转义 ── */

.escape-dir {
  display: flex;
  gap: 24px;
  margin-bottom: 18px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
}

.escape-dir .opt { padding: 4px 0; }

.escape-dir input[type="radio"] {
  flex: 0 0 auto;
  margin: 4px 0 0;
  accent-color: var(--accent);
  cursor: pointer;
}

.escape-input { min-height: 180px; }

.escape-result__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 28px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink-2);
}

.escape-result__head strong { font-weight: 500; color: var(--ink); }

.escape-result__body {
  margin-top: 16px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.8;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.escape-empty {
  margin: 28px 0 0;
  padding: 36px 0;
  text-align: center;
  color: var(--ink-3);
  font-size: 13.5px;
}

/* ── 表格生成器 ── */

.table-input {
  position: relative;
}

.table-input textarea { min-height: 200px; }

.table-input__drop {
  margin-top: 10px;
  padding: 16px;
  border: 2px dashed var(--line);
  border-radius: 10px;
  text-align: center;
  color: var(--ink-3);
  font-size: 13px;
  transition: border-color .15s ease, background-color .15s ease;
}

.table-input__drop.is-dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.table-opts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  margin-top: 16px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
}

.table-opts .field { flex: 1 1 200px; min-width: 0; }

.table-opts .field input[type="text"] {
  width: 100%;
  height: 34px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--ink);
  font: inherit;
  font-size: 13px;
  outline: none;
  transition: border-color .15s ease;
}

.table-opts .field input[type="text"]:hover { border-color: var(--line-hover); }
.table-opts .field input[type="text"]:focus { border-color: var(--accent); }

.table-empty {
  margin: 28px 0 0;
  padding: 36px 0;
  text-align: center;
  color: var(--ink-3);
  font-size: 13.5px;
}

.table-result__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 28px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink-2);
}

.table-result__split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 16px;
}

.table-result__split h3 {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-2);
}

.table-preview {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.table-preview th,
.table-preview td {
  padding: 8px 10px;
  border: 1px solid var(--line);
  text-align: left;
}

.table-preview th {
  background: var(--bg-soft);
  font-weight: 500;
}

.table-result__code pre {
  margin: 0;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.75;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
  max-height: 400px;
  overflow-y: auto;
}

/* ── 参考文献去重 ── */

.dedup-empty {
  margin: 28px 0 0;
  padding: 36px 0;
  text-align: center;
  color: var(--ink-3);
  font-size: 13.5px;
}

.dedup-result__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  margin-top: 20px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
  font-size: 12.5px;
  color: var(--ink-2);
}

.dedup-result__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink-2);
}

.dedup-result__actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.btn--sm {
  height: 32px;
  padding: 0 14px;
  font-size: 12.5px;
  border-radius: 8px;
}

.dedup-result__body {
  margin-top: 16px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.75;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
  max-height: 500px;
  overflow-y: auto;
}

.status__ok { color: var(--open); }
.status__err { color: var(--warn); }

/* ── LaTeX 引用转换 ── */

.citecmd-dir {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
}

.citecmd-dir .field { flex: 1 1 0; min-width: 0; }

.citecmd-arrow {
  flex: 0 0 auto;
  font-size: 18px;
  color: var(--ink-3);
  padding-top: 18px;
}

.citecmd-input { min-height: 200px; }

.citecmd-result__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 28px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink-2);
}

.citecmd-result__head strong { font-weight: 500; color: var(--ink); }

.citecmd-result__body {
  margin-top: 16px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.8;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.citecmd-empty {
  margin: 28px 0 0;
  padding: 36px 0;
  text-align: center;
  color: var(--ink-3);
  font-size: 13.5px;
}

@media (max-width: 900px) {
  .table-result__split { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .escape-dir { flex-direction: column; gap: 8px; }
  .citecmd-dir { flex-direction: column; gap: 10px; }
  .citecmd-arrow { padding-top: 0; transform: rotate(90deg); }
  .table-opts { gap: 10px 14px; }
  .table-opts .field { flex: 1 1 100%; }
}

/* ── 期刊与会议查证 ── */

.journal-empty {
  margin: 28px 0 0;
  padding: 36px 0;
  text-align: center;
  color: var(--ink-3);
  font-size: 13.5px;
}


/* ── Journal lookup ── */

.journal-card {
  margin-top: 26px;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 24px;
}

.journal-card__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.journal-card__title {
  margin: 0;
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 500;
  line-height: 1.4;
}

.journal-risk {
  flex: 0 0 auto;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
}

.journal-risk--low { background: var(--bg-ok); color: var(--open); }
.journal-risk--medium { background: var(--bg-warn); color: var(--warn-text); }
.journal-risk--high { background: var(--bg-err); color: var(--warn); }

.journal-risk__reasons {
  margin: 0 0 16px;
  padding: 12px 14px;
  background: var(--bg-err);
  border: 1px solid var(--border-err);
  border-radius: 8px;
  font-size: 13px;
  color: var(--warn);
  list-style: none;
}

.journal-risk__reasons li { margin-bottom: 4px; }
.journal-risk__reasons li:last-child { margin-bottom: 0; }

.journal-card__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px 24px;
}

.journal-field {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.journal-field__k {
  font-size: 11.5px;
  color: var(--ink-3);
}

.journal-field__v {
  font-size: 14px;
  color: var(--ink);
}

.journal-card__links {
  margin-top: 20px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* ── DOI 批量解析 ── */

.batch-empty {
  margin: 28px 0 0;
  padding: 36px 0;
  text-align: center;
  color: var(--ink-3);
  font-size: 13.5px;
}

.batch-progress {
  margin-top: 20px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
}

.batch-bar {
  height: 6px;
  border-radius: 3px;
  background: var(--line-soft);
  overflow: hidden;
}

.batch-bar__fill {
  height: 100%;
  border-radius: 3px;
  background: var(--accent);
  transition: width .3s ease;
}

.batch-bar__text {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  color: var(--ink-2);
  text-align: center;
}

.batch-result__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 26px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink-2);
}

.batch-item {
  display: flex;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}

.batch-item:last-child { border-bottom: none; }

.batch-item__num {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: var(--bg-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--ink-3);
}

.batch-item__body { flex: 1 1 auto; min-width: 0; }

.batch-item__text {
  font-size: 14px;
  line-height: 1.75;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.batch-item__doi {
  margin-top: 5px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-3);
}

.batch-failed {
  margin-top: 24px;
  padding: 14px 16px;
  border: 1px solid var(--border-err);
  border-radius: 10px;
  background: var(--bg-err);
}

.batch-failed h3 {
  margin: 0 0 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--warn);
}

.batch-failed ul {
  margin: 0;
  padding-left: 18px;
  font-size: 13px;
  color: var(--warn);
}

.batch-failed li { margin-bottom: 4px; }

/* ── 引文格式校验 ── */

.refcheck-label {
  display: block;
  margin: 18px 0 8px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--ink-2);
}

.refcheck-label:first-child { margin-top: 0; }

.refcheck-label span {
  font-weight: 400;
  color: var(--ink-3);
}

.refcheck-cite {
  margin: 16px 0 0;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-2);
}

.refcheck-cite h3 {
  margin: 0 0 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
}

.refcheck-cite ul { margin: 0; padding-left: 18px; }
.refcheck-cite--ok { border-color: var(--border-ok); background: var(--bg-ok); color: var(--open); }
.refcheck-cite--warn { border-color: var(--border-warn); background: var(--bg-warn); }

.refcheck-input { min-height: 250px; }

.refcheck-input--sm { min-height: 140px; }

.refcheck-empty {
  margin: 28px 0 0;
  padding: 36px 0;
  text-align: center;
  color: var(--ink-3);
  font-size: 13.5px;
}


/* ── Ref check ── */

.refcheck-summary {
  margin-top: 24px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 14px;
}

.refcheck-summary strong { font-weight: 500; color: var(--ink); }

.refcheck-seq {
  margin-top: 16px;
  padding: 12px 16px;
  border: 1px solid var(--border-err);
  border-radius: 10px;
  background: var(--bg-err);
}

.refcheck-seq h3 {
  margin: 0 0 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--warn);
}

.refcheck-seq ul {
  margin: 0;
  padding-left: 18px;
  font-size: 13px;
  color: var(--warn);
}

.refcheck-list {
  margin-top: 20px;
}

.refcheck-item {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  margin-bottom: 10px;
}

.refcheck-item--err { border-color: var(--border-err); background: var(--bg-err); }
.refcheck-item--warn { border-color: var(--border-warn); background: var(--bg-warn); }
.refcheck-item--ok { border-color: var(--border-ok); background: var(--bg-ok); }

.refcheck-item__head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 12px;
}

.refcheck-item__num {
  font-family: var(--mono);
  font-weight: 500;
  color: var(--ink-2);
}

.refcheck-item__type {
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--bg-soft);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-2);
}

.refcheck-item__typelabel {
  font-size: 11.5px;
  color: var(--ink-3);
}

.refcheck-item__badge {
  margin-left: auto;
  font-size: 12px;
  font-weight: 500;
}

.refcheck-item--ok .refcheck-item__badge { color: var(--open); }
.refcheck-item--warn .refcheck-item__badge { color: var(--warn-text); }
.refcheck-item--err .refcheck-item__badge { color: var(--warn); }

.refcheck-item__text {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-2);
  word-break: break-word;
  overflow-wrap: anywhere;
}

.refcheck-item__issues {
  margin: 8px 0 0;
  padding-left: 18px;
  font-size: 12.5px;
  list-style: none;
}

.refcheck-issue--err { color: var(--warn); }
.refcheck-issue--err::before { content: '✗ '; }
.refcheck-issue--warn { color: var(--warn-text); }
.refcheck-issue--warn::before { content: '⚡ '; }

/* ── 数学符号速查 ── */




/* ── Math symbols ── */

.math-cat { margin-top: 30px; }

.math-cat__title {
  margin: 0 0 12px;
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 500;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.math-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 8px;
}

.math-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 12px 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  cursor: pointer;
  transition: border-color .12s ease, background-color .12s ease;
  font: inherit;
  text-align: center;
}

.math-card:hover { border-color: var(--accent); background: var(--accent-soft); }

.math-card--copied {
  border-color: var(--open);
  background: var(--bg-ok);
}

.math-card__sym {
  font-size: 22px;
  line-height: 1.2;
}

.math-card__cmd {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-3);
  word-break: break-all;
}

.math-card__label {
  font-size: 11px;
  color: var(--ink-2);
  line-height: 1.3;
}

.math-empty {
  margin: 28px 0 0;
  padding: 36px 0;
  text-align: center;
  color: var(--ink-3);
  font-size: 13.5px;
}

/* ── LaTeX 报错解读 ── */




/* ── LaTeX errors ── */

.error-card {
  margin-top: 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}

.error-card__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--line);
}

.error-card__code {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--warn);
  padding: 2px 8px;
  background: var(--bg-err);
  border-radius: 5px;
  border: 1px solid var(--border-err);
  white-space: nowrap;
}

.error-card__title {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
}

.error-card__body {
  padding: 14px 16px;
}

.error-card__section {
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-2);
  margin-bottom: 10px;
}

.error-card__section:last-child { margin-bottom: 0; }

.error-card__section strong { color: var(--ink); font-weight: 500; }

.error-card__example {
  margin-top: 10px;
  padding: 10px 12px;
  background: var(--bg-soft);
  border-radius: 8px;
  font-size: 12.5px;
}

.error-card__example code {
  color: var(--ink-2);
}

.errors-empty {
  margin: 28px 0 0;
  padding: 36px 0;
  text-align: center;
  color: var(--ink-3);
  font-size: 13.5px;
}

@media (max-width: 640px) {
  .journal-card__head { flex-direction: column; gap: 10px; }
  .journal-card__grid { grid-template-columns: 1fr; }
  .batch-item { gap: 10px; }
  .math-grid { grid-template-columns: repeat(auto-fill, minmax(85px, 1fr)); }
  .math-card { padding: 10px 6px; }
  .math-card__sym { font-size: 18px; }
  .error-card__head { flex-direction: column; align-items: flex-start; gap: 6px; }
}


/* ── Dark Mode ── */

[data-theme="dark"] {
  color-scheme: dark;
  --ink: #e5e5e7;
  --ink-2: #a1a1a6;
  --ink-3: #76767b;
  --line: #38383a;
  --line-soft: #2c2c2e;
  --bg: #1c1c1e;
  --bg-soft: #242426;
  --bg-side: #202022;
  --bg-hover: #333336;
  --bg-active: #3a3a3c;
  --accent: #4da6e8;
  --accent-soft: #1a2e40;
  --open: #4caf7a;
  --warn: #e07050;
  --bg-err: #2e1a14;
  --border-err: #5a3020;
  --bg-ok: #142e1a;
  --border-ok: #2a5a34;
  --bg-warn: #2e2410;
  --border-warn: #5a4a20;
  --warn-text: #d4a840;
  --mark-bg: #1a2e40;
  --mark-text: #80bce0;
  --accent-hover: #5cb0f0;
  --line-hover: #4a4a4e;
  --placeholder: #636366;
  --select-chevron: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23a1a1a6' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 4.5 6 7.5 9 4.5'/%3E%3C/svg%3E");
  --shadow-seg: 0 1px 3px rgba(0, 0, 0, .45);
}

[data-theme="dark"] .scrim { background: rgba(0, 0, 0, .5); }

[data-theme="dark"] .sidebar.is-open {
  box-shadow: 0 0 48px rgba(0, 0, 0, .4);
}

[data-theme="dark"] .mobile-bar {
  background: rgba(32, 32, 34, .93);
}

[data-theme="dark"] .mix-result__body mark {
  background: var(--mark-bg);
  color: var(--mark-text);
}

[data-theme="dark"] .candidate__exact { color: var(--open); }

/* ── Cover Letter / CRediT ── */

.cl-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 24px;
  padding: 4px;
  background: var(--bg-soft);
  border-radius: 10px;
  border: 1px solid var(--line);
}

.cl-tab {
  flex: 1 1 0;
  padding: 8px 0;
  border: 0;
  border-radius: 7px;
  background: none;
  font: inherit;
  font-size: 13.5px;
  color: var(--ink-2);
  cursor: pointer;
  transition: background-color .12s ease, color .12s ease;
}

.cl-tab.is-on { background: var(--bg); color: var(--ink); font-weight: 500; box-shadow: var(--shadow-seg); }
.cl-tab:hover:not(.is-on) { color: var(--ink); }

.cl-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 20px;
}

.cl-field { display: flex; flex-direction: column; gap: 5px; }
.cl-field--full { grid-column: 1 / -1; }

.cl-field__label {
  font-size: 12.5px;
  color: var(--ink-2);
  font-weight: 500;
}

.cl-optional { font-weight: 400; color: var(--ink-3); }

.cl-field input,
.cl-field textarea,
.cl-field select {
  width: 100%;
  font: inherit;
  font-size: 14px;
  color: var(--ink);
  background-color: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 12px;
  outline: none;
  transition: border-color .15s ease;
}

.cl-field select {
  height: 42px;
  padding: 0 32px 0 12px;
  background-image: var(--select-chevron);
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 12px 12px;
}

.cl-field input:hover,
.cl-field textarea:hover { border-color: var(--line-hover); }

.cl-field input:focus,
.cl-field textarea:focus,
.cl-field select:focus { border-color: var(--accent); }

.cl-field input::placeholder,
.cl-field textarea::placeholder { color: var(--placeholder); }

.cl-field textarea { resize: vertical; line-height: 1.7; }

.cl-output { margin-top: 28px; }

.cl-output__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink-2);
}

.cl-output__body {
  margin: 16px 0 0;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.8;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.cl-warn {
  margin: 20px 0 0;
  padding: 12px 14px;
  font-size: 13px;
  color: var(--warn);
  background: var(--bg-err);
  border: 1px solid var(--border-err);
  border-radius: 9px;
}

.cl-hint {
  margin: 0 0 16px;
  font-size: 13px;
  color: var(--ink-3);
  line-height: 1.7;
}

.cl-credit-grid {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}

.cl-credit-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 14px;
  background: var(--bg);
  border-bottom: 1px solid var(--line-soft);
}

.cl-credit-row:last-child { border-bottom: none; }

.cl-credit-role {
  flex: 0 0 220px;
  font-size: 12.5px;
  color: var(--ink-2);
}

.cl-credit-zh { color: var(--ink-3); font-size: 11.5px; }

.cl-credit-checks {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
}

.cl-credit-check {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--ink-2);
  cursor: pointer;
}

.cl-credit-check input[type="checkbox"] {
  width: 14px;
  height: 14px;
  accent-color: var(--accent);
  cursor: pointer;
}

.cl-credit-actions { margin-top: 6px; }

@media (max-width: 640px) {
  .cl-form { grid-template-columns: 1fr; }
  .cl-field--full { grid-column: 1; }
  .cl-credit-role { flex: 0 0 140px; font-size: 11.5px; }
  .cl-credit-zh { display: none; }
}

/* ── Academic Phrase Bank ── */

.ph-search { margin-bottom: 16px; }

.ph-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 20px;
}

.ph-tab {
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--bg);
  font: inherit;
  font-size: 12px;
  color: var(--ink-2);
  cursor: pointer;
  transition: background-color .12s ease, color .12s ease, border-color .12s ease;
}

.ph-tab:hover { border-color: var(--line-hover); color: var(--ink); }
.ph-tab.is-on { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); font-weight: 500; }

.ph-count {
  margin: 0 0 10px;
  font-size: 12.5px;
  color: var(--ink-3);
}

.ph-card mark {
  background: var(--mark-bg);
  color: var(--mark-text);
  padding: 0 1px;
  border-radius: 2px;
}

.ph-card__zh { cursor: pointer; }

.ph-grid {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.ph-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--bg);
  transition: border-color .12s ease, background-color .12s ease;
  position: relative;
}

.ph-card:hover { border-color: var(--line); background: var(--bg-soft); }

.ph-card__en {
  flex: 1 1 auto;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink);
}

.ph-card__zh {
  flex: 0 0 auto;
  max-width: 280px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--ink-3);
  text-align: right;
}

.ph-card__meta {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
  min-width: 0;
}

.ph-card__cat {
  font-size: 10px;
  color: var(--ink-3);
  white-space: nowrap;
}

.ph-card__sub {
  font-size: 10px;
  color: var(--accent);
  white-space: nowrap;
}

.ph-card__copy {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border: 0;
  border-radius: 6px;
  background: none;
  color: var(--ink-3);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity .12s ease, background-color .12s ease;
}

.ph-card:hover .ph-card__copy { opacity: 1; }
.ph-card__copy:hover { background: var(--bg-hover); color: var(--ink); }

.ph-card--copied { border-color: var(--border-ok); background: var(--bg-ok); }

.ph-empty {
  margin: 40px 0;
  text-align: center;
  color: var(--ink-3);
  font-size: 13.5px;
}

@media (max-width: 640px) {
  .ph-tabs { gap: 3px; }
  .ph-tab { padding: 5px 8px; font-size: 11px; }
  .ph-card { flex-wrap: wrap; gap: 6px; }
  .ph-card__zh { max-width: 100%; text-align: left; }
  .ph-card__meta { flex-direction: row; gap: 6px; }
  .ph-card__copy { opacity: 1; }
}

/* ── Preamble Generator ── */

.pm-h2 {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 30px 0 12px;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 500;
}

.pm-h2__sub {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 400;
  color: var(--ink-3);
}

.pm-doctypes {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 4px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
}

.pm-radio {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 6px 0;
  cursor: pointer;
}

.pm-radio input[type="radio"] {
  margin: 3px 0 0;
  accent-color: var(--accent);
  cursor: pointer;
}

.pm-radio__body { display: flex; flex-direction: column; gap: 1px; }

.pm-radio__key { font-family: var(--mono); font-size: 13px; color: var(--ink); }
.pm-radio__desc { font-size: 11.5px; color: var(--ink-3); }

.pm-pkg-group { margin-bottom: 16px; }

.pm-pkg-group__title {
  margin: 0 0 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-2);
}

.pm-pkg-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 2px;
}

.pm-pkg {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color .1s ease;
}

.pm-pkg:hover { background: var(--bg-hover); }

.pm-pkg input[type="checkbox"] {
  margin: 3px 0 0;
  accent-color: var(--accent);
  cursor: pointer;
}

.pm-pkg__body { display: flex; flex-direction: column; gap: 1px; }
.pm-pkg__name { font-family: var(--mono); font-size: 12.5px; color: var(--ink); }
.pm-pkg__desc { font-size: 11.5px; color: var(--ink-3); }

.pm-settings {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
}

.pm-setting {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-2);
}

.pm-setting__label { white-space: nowrap; }

.pm-setting select { min-width: 110px; }

.pm-setting input[type="checkbox"] {
  width: 15px; height: 15px;
  accent-color: var(--accent);
  cursor: pointer;
}

.pm-output { margin-top: 28px; }

.pm-output__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink-2);
}

.pm-output__body {
  margin: 16px 0 0;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.8;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.cl-lang {
  display: inline-flex;
  gap: 4px;
  margin: 0 0 18px;
  padding: 3px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.cl-lang__btn {
  appearance: none;
  border: 0;
  background: none;
  font: inherit;
  font-size: 12.5px;
  color: var(--ink-2);
  padding: 5px 12px;
  border-radius: 7px;
  cursor: pointer;
}

.cl-lang__btn.is-on { background: var(--bg); color: var(--ink); font-weight: 500; box-shadow: var(--shadow-seg); }

.cl-sub {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 28px 0 12px;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 500;
}

.cl-repeat { display: flex; flex-direction: column; gap: 8px; margin-bottom: 10px; }

.cl-repeat__row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 32px;
  gap: 8px;
  align-items: center;
}

.cl-repeat__row input {
  font: inherit;
  font-size: 14px;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 12px;
  outline: none;
  transition: border-color .15s ease;
}

.cl-repeat__row input:hover { border-color: var(--line-hover); }
.cl-repeat__row input:focus { border-color: var(--accent); }

.cl-repeat__row input::placeholder { color: var(--placeholder); }

.cl-repeat__del {
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 8px;
  background: none;
  color: var(--ink-3);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
}

.cl-repeat__del:hover { background: var(--bg-err); color: var(--warn); }

.cl-rev {
  margin: 0 0 16px;
  padding: 14px 16px 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
}

.cl-rev__head {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 12px;
}

.cl-rev__label {
  flex: 1;
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 12px;
  outline: none;
  transition: border-color .15s ease;
}

.cl-rev__label:hover { border-color: var(--line-hover); }
.cl-rev__label:focus { border-color: var(--accent); }

.cl-comment {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0 0 14px;
  padding: 12px;
  background: var(--bg);
  border: 1px solid var(--line-soft);
  border-radius: 9px;
}

.cl-comment__foot {
  display: flex;
  gap: 12px;
  align-items: flex-end;
  justify-content: space-between;
}

.cl-comment__foot .cl-field { flex: 1; }

.cl-hl-count {
  font-weight: 400;
  color: var(--ink-3);
  margin-left: 8px;
}

.cl-hl-count.is-over { color: var(--warn); }

.cl-hl-issues {
  margin: 12px 0 0;
  padding: 10px 14px;
  background: var(--bg-err);
  border: 1px solid var(--border-err);
  border-radius: 8px;
  color: var(--warn);
  font-size: 12.5px;
  line-height: 1.6;
}

.cl-tabs { flex-wrap: wrap; }
.cl-tab { flex: 1 1 140px; }

@media (max-width: 640px) {
  .cl-repeat__row { grid-template-columns: 1fr 32px; }
  .cl-repeat__row input:nth-child(2),
  .cl-repeat__row input:nth-child(3) { grid-column: 1; }
  .cl-comment__foot { flex-direction: column; align-items: stretch; }
}