/* NOK trainer — light exam-style UI, mobile-first */
:root {
  --bg-0: #f3f3f7;
  --bg-1: #ffffff;
  --bg-2: #f7f7fb;
  --bg-3: #ececf2;
  --border: #e2e4ec;
  --border-strong: #cfd3df;
  --text: #1f2330;
  --text-muted: #6b7285;
  --accent: #2f5bea;
  --accent-hover: #2448c9;
  --accent-soft: #e8eeff;
  --accent-strong: #1e44c9;
  --select: #e8943a;
  --select-soft: #fff4e8;
  --select-border: #f0b15a;
  --ok: #1a7a45;
  --ok-soft: #e6f6ea;
  --ok-border: #8fd4a8;
  --danger: #b42318;
  --danger-soft: #fde8eb;
  --danger-border: #f0a8b0;
  --warn: #9a6700;
  --warn-soft: #fff6e0;
  --info: #3b5bdb;
  --info-soft: #e8eeff;
  --lilac: #6b5ce7;
  --lilac-soft: #eee8ff;
  --shadow: 0 4px 16px rgba(31, 35, 48, 0.06), 0 1px 3px rgba(31, 35, 48, 0.04);
  --shadow-lg: 0 12px 32px rgba(31, 35, 48, 0.08);
  --radius: 14px;
  --radius-sm: 12px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

html, body {
  margin: 0;
  min-height: 100%;
  min-height: 100dvh;
  background: var(--bg-0);
  color: var(--text);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}

a { color: var(--accent-strong); text-decoration: none; }
a:hover { text-decoration: underline; }

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input, select, textarea { font: inherit; color: inherit; }

.app {
  width: min(920px, 100%);
  margin: 0 auto;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  padding:
    calc(0.35rem + var(--safe-top))
    max(var(--safe-right), 0.75rem)
    calc(0.75rem + var(--safe-bottom))
    max(var(--safe-left), 0.75rem);
}

/* Header */
.header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0 0.75rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  margin: 0 calc(-1 * max(var(--safe-left), 0.75rem));
  padding-left: max(var(--safe-left), 0.75rem);
  padding-right: max(var(--safe-right), 0.75rem);
  box-shadow: 0 1px 0 rgba(255,255,255,0.8);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: inherit;
  text-decoration: none;
  flex-shrink: 0;
}
.brand:hover { text-decoration: none; }
.brand h1 {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}
.tagline {
  margin: 0;
  font-size: 0.72rem;
  color: var(--text-muted);
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 11px;
  background: linear-gradient(145deg, #3b6cf5, #2448c9);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  box-shadow: 0 4px 12px rgba(47, 91, 234, 0.28);
}

.nav {
  display: flex;
  gap: 0.15rem;
  margin-left: auto;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.nav a {
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.4rem 0.6rem;
  border-radius: 9px;
  font-size: 0.85rem;
  font-weight: 500;
}
.nav a:hover {
  color: var(--text);
  background: var(--bg-2);
  text-decoration: none;
}
.nav a.active {
  color: var(--accent-strong);
  background: var(--accent-soft);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 0.45rem;
  margin-left: auto;
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
}

.main { flex: 1; padding: 1.15rem 0 1.5rem; }
.footer {
  border-top: 1px solid var(--border);
  padding: 0.85rem 0 0.25rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
}

/* Cards & UI */
.card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.25rem;
  box-shadow: var(--shadow);
}
.card + .card { margin-top: 0.85rem; }

.hero h2 {
  margin: 0 0 0.35rem;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}
.hero .qual {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin: 0 0 1rem;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.65rem;
  margin-bottom: 1.15rem;
}
.stat {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.6rem;
  text-align: center;
}
.stat-value {
  display: block;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--accent-strong);
  line-height: 1.2;
}
.stat-label {
  display: block;
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

.progress-bar {
  height: 8px;
  background: var(--bg-3);
  border-radius: 99px;
  overflow: hidden;
  margin: 0.5rem 0 1.1rem;
}
.progress-bar > span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #5b8cff);
  border-radius: 99px;
  transition: width 0.35s ease;
}

.mode-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}
.mode-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.25rem;
  padding: 0.95rem 1rem;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-align: left;
  transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
  color: inherit;
  text-decoration: none;
  cursor: pointer;
}
.mode-btn:hover {
  border-color: #b8c7f5;
  background: #fff;
  box-shadow: var(--shadow);
  text-decoration: none;
}
.mode-btn strong { font-size: 0.95rem; color: var(--text); }
.mode-btn span { font-size: 0.78rem; color: var(--text-muted); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.55rem 1rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.9rem;
  border: 1px solid transparent;
  transition: background 0.15s, border-color 0.15s, opacity 0.15s, box-shadow 0.15s;
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(47, 91, 234, 0.25);
}
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); }
.btn-ghost {
  background: #fff;
  border-color: var(--border-strong);
  color: var(--text);
}
.btn-ghost:hover:not(:disabled) { background: var(--bg-2); }
.btn-danger {
  background: var(--danger-soft);
  color: var(--danger);
  border-color: var(--danger-border);
}
.btn-sm { padding: 0.35rem 0.7rem; font-size: 0.82rem; }
.btn-block { width: 100%; }

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.9rem;
}
.toolbar label {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.toolbar select,
.field-input {
  background: #fff;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  padding: 0.45rem 0.6rem;
  color: var(--text);
  min-width: 0;
}
.field-input { width: 100%; padding: 0.65rem 0.8rem; }
.field-input:focus, .toolbar select:focus {
  outline: 2px solid var(--accent-soft);
  border-color: var(--accent);
}

.seg {
  display: inline-flex;
  background: #fff;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  overflow: hidden;
}
.seg button {
  padding: 0.4rem 0.7rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.seg button.active {
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-weight: 600;
}

.q-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.75rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.65rem;
}
.badge {
  display: inline-block;
  padding: 0.18rem 0.55rem;
  border-radius: 99px;
  background: var(--bg-3);
  font-size: 0.72rem;
  font-weight: 600;
}
.badge-topic { background: var(--info-soft); color: var(--info); }
.badge-type { background: var(--lilac-soft); color: var(--lilac); }

.q-text {
  font-size: 1.02rem;
  font-weight: 600;
  margin: 0 0 1rem;
  line-height: 1.45;
  color: var(--text);
}

.options { display: flex; flex-direction: column; gap: 0.5rem; }

.option {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  padding: 0.85rem 0.95rem;
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
  text-align: left;
  width: 100%;
  box-shadow: 0 1px 2px rgba(31, 35, 48, 0.03);
}
.option:hover:not(.disabled) {
  border-color: #c5cce0;
  box-shadow: var(--shadow);
}
.option.selected:not(.correct):not(.wrong) {
  border-color: var(--select-border);
  background: var(--select-soft);
  box-shadow: 0 0 0 3px rgba(232, 148, 58, 0.12);
}
.option.correct {
  border-color: var(--ok-border);
  background: var(--ok-soft);
  color: var(--ok);
}
.option.correct:not(.selected) {
  border-style: dashed;
  border-width: 1.5px;
  border-color: var(--ok);
  background: #f3fbf6;
}
.option.wrong {
  border-color: var(--danger-border);
  background: var(--danger-soft);
  color: var(--danger);
}
.option.disabled { cursor: default; }
.option input {
  margin-top: 0.15rem;
  flex-shrink: 0;
  width: 1.15rem;
  height: 1.15rem;
  accent-color: var(--select);
}
.option.correct input { accent-color: var(--ok); }
.option.wrong input { accent-color: var(--danger); }
.option-letter {
  flex-shrink: 0;
  width: 1.55rem;
  height: 1.55rem;
  border-radius: 50%;
  background: var(--bg-2);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
}
.option.selected:not(.correct):not(.wrong) .option-letter {
  background: var(--select-soft);
  border-color: var(--select-border);
  color: #b86a12;
}
.option.correct .option-letter {
  background: var(--ok);
  border-color: var(--ok);
  color: #fff;
}
.option.wrong .option-letter {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}
.option-text { flex: 1; min-width: 0; word-break: break-word; color: var(--text); }
.option.correct .option-text,
.option.wrong .option-text { color: inherit; }

.feedback {
  margin-top: 0.9rem;
  padding: 0.8rem 0.95rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}
.feedback.ok {
  background: var(--ok-soft);
  border: 1px solid var(--ok-border);
  color: var(--ok);
}
.feedback.bad {
  background: var(--danger-soft);
  border: 1px solid var(--danger-border);
  color: var(--danger);
}
.feedback .source, .explanation {
  margin-top: 0.45rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.topic-link {
  display: inline-block;
  margin-top: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-strong);
}

.nav-row {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}
.nav-row .spacer { flex: 1; }

/* Match questions */
.match-list { display: flex; flex-direction: column; gap: 0.75rem; }
.match-row {
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.85rem;
  box-shadow: 0 1px 2px rgba(31, 35, 48, 0.03);
}
.match-row.correct {
  border-color: var(--ok-border);
  background: var(--ok-soft);
}
.match-row.wrong {
  border-color: var(--danger-border);
  background: var(--danger-soft);
}
.match-term {
  font-weight: 650;
  font-size: 0.92rem;
  margin-bottom: 0.5rem;
  color: var(--text);
}
.match-correct-hint {
  margin-top: 0.45rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Custom select */
.cselect { position: relative; }
.cselect-btn {
  width: 100%;
  text-align: left;
  padding: 0.7rem 2rem 0.7rem 0.8rem;
  background: #fff;
  border: 1.5px solid var(--border-strong);
  border-radius: 10px;
  position: relative;
  font-size: 0.88rem;
  line-height: 1.4;
  min-height: 2.6rem;
  white-space: normal;
  word-break: break-word;
  color: var(--text);
  box-shadow: 0 1px 2px rgba(31, 35, 48, 0.03);
}
.cselect-btn::after {
  content: "";
  position: absolute;
  right: 0.85rem;
  top: 50%;
  width: 0.45rem;
  height: 0.45rem;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: translateY(-60%) rotate(45deg);
}
.cselect-btn.placeholder { color: var(--text-muted); }
.cselect-btn:disabled { opacity: 0.75; cursor: default; background: var(--bg-2); }
.cselect-menu {
  position: absolute;
  z-index: 30;
  left: 0;
  right: 0;
  top: calc(100% + 4px);
  max-height: min(50vh, 320px);
  overflow-y: auto;
  background: #fff;
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  display: none;
}
.cselect.open .cselect-menu { display: block; }
.cselect-option {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.7rem 0.85rem;
  font-size: 0.85rem;
  line-height: 1.4;
  white-space: normal;
  word-break: break-word;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}
.cselect-option:last-child { border-bottom: none; }
.cselect-option:hover, .cselect-option.active {
  background: var(--accent-soft);
}
.cselect-option.picked {
  color: var(--accent-strong);
  font-weight: 600;
  background: var(--accent-soft);
}

/* Exam */
.exam-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.9rem;
  padding: 0.7rem 0.9rem;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
}
.timer {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 1.1rem;
  font-family: var(--mono);
  color: var(--text);
}
.timer.warn { color: var(--warn); }
.timer.danger { color: var(--danger); }

.exam-setup .field-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1rem 0;
}
.exam-setup .field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  flex: 1;
  min-width: 140px;
}
.exam-setup .field label { font-size: 0.82rem; color: var(--text-muted); }

.result-score {
  text-align: center;
  padding: 1rem 0;
}
.result-score .big {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--accent-strong);
  line-height: 1;
}
.result-score .sub { color: var(--text-muted); margin-top: 0.35rem; }

.review-item {
  border-left: 3px solid var(--border-strong);
  padding: 0.65rem 0 0.65rem 0.85rem;
  margin-top: 0.65rem;
}
.review-item.ok { border-left-color: var(--ok); }
.review-item.bad { border-left-color: var(--danger); }
.review-item h4 { margin: 0 0 0.35rem; font-size: 0.92rem; color: var(--text); }

.empty {
  text-align: center;
  padding: 2.2rem 1rem;
  color: var(--text-muted);
}
.empty strong {
  display: block;
  color: var(--text);
  margin-bottom: 0.35rem;
  font-size: 1.05rem;
}

.search-results { display: flex; flex-direction: column; gap: 0.5rem; margin-top: 0.85rem; }
.search-hit {
  display: block;
  padding: 0.8rem 0.9rem;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: inherit;
  text-decoration: none;
  box-shadow: 0 1px 2px rgba(31, 35, 48, 0.03);
}
.search-hit:hover {
  border-color: #b8c7f5;
  box-shadow: var(--shadow);
  text-decoration: none;
}
.search-hit .hit-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}
.search-hit mark {
  background: #ffe8b8;
  color: inherit;
  border-radius: 2px;
  padding: 0 2px;
}

.article-list { display: flex; flex-direction: column; gap: 0.65rem; }
.article-card {
  display: block;
  padding: 0.95rem 1rem;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: inherit;
  text-decoration: none;
  box-shadow: 0 1px 2px rgba(31, 35, 48, 0.03);
}
.article-card:hover {
  border-color: #b8c7f5;
  box-shadow: var(--shadow);
  text-decoration: none;
}
.article-card h3 { margin: 0 0 0.3rem; font-size: 1rem; color: var(--text); }
.article-card p { margin: 0; font-size: 0.85rem; color: var(--text-muted); }
.article-body {
  margin-top: 1rem;
  line-height: 1.6;
  font-size: 0.95rem;
  color: var(--text);
}
.article-body h2, .article-body h3 { margin-top: 1.2rem; color: var(--text); }
.article-body p { margin: 0.6rem 0; }
.article-body ul, .article-body ol { padding-left: 1.25rem; }
.article-body code {
  font-family: var(--mono);
  background: var(--bg-2);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.88em;
  border: 1px solid var(--border);
}

.loading {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}

.muted { color: var(--text-muted); }
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  border: 0;
}

/* ===== All questions catalogue ===== */
.all-page { display: flex; flex-direction: column; gap: 0.85rem; }
.all-head h2 { margin: 0 0 0.25rem; color: var(--text); }
.all-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 0.85rem;
  align-items: flex-end;
  margin-top: 0.85rem;
}
.all-field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  min-width: 160px;
}
.all-field-grow { flex: 1 1 220px; }
.all-field select,
.all-field .field-input {
  background: #fff;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  padding: 0.5rem 0.65rem;
  color: var(--text);
}
.all-check {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.88rem;
  color: var(--text);
  padding-bottom: 0.35rem;
  cursor: pointer;
  user-select: none;
}
.all-check input { accent-color: var(--accent); width: 1.05rem; height: 1.05rem; }
.all-count {
  margin-left: auto;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent-strong);
  padding-bottom: 0.4rem;
}

.all-list { display: flex; flex-direction: column; gap: 0.75rem; }
.all-q { break-inside: avoid; page-break-inside: avoid; }
.all-num {
  font-weight: 700;
  color: var(--accent-strong);
  font-variant-numeric: tabular-nums;
}
.all-id { font-size: 0.72rem; }

.all-options { display: flex; flex-direction: column; gap: 0.4rem; margin: 0.25rem 0 0.5rem; }
.all-opt {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  padding: 0.7rem 0.8rem;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: #fff;
}
.all-opt.is-correct {
  border-color: var(--ok-border);
  background: var(--ok-soft);
  color: var(--ok);
}
.all-opt.is-wrong {
  opacity: 0.55;
  background: var(--bg-2);
  color: var(--text-muted);
}
.all-opt .option-text { flex: 1; min-width: 0; word-break: break-word; }
.all-opt.is-correct .option-text { color: var(--ok); }
.all-check-mark {
  flex-shrink: 0;
  color: var(--ok);
  font-weight: 800;
  font-size: 1.05rem;
  line-height: 1.3;
}

.all-pairs { display: flex; flex-direction: column; gap: 0.5rem; margin: 0.25rem 0 0.5rem; }
.all-pair {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.4fr);
  gap: 0.55rem;
  padding: 0.75rem 0.85rem;
  background: var(--ok-soft);
  border: 1px solid var(--ok-border);
  border-radius: var(--radius-sm);
}
.all-pair-term { font-weight: 650; word-break: break-word; color: var(--ok); }
.all-pair-def { color: var(--text); word-break: break-word; font-size: 0.92rem; line-height: 1.4; }

.all-distractors {
  margin-top: 0.55rem;
  padding: 0.65rem 0.75rem;
  background: var(--bg-2);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
}
.all-distractors-title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}
.all-distractor {
  font-size: 0.88rem;
  color: var(--text-muted);
  padding: 0.35rem 0;
  border-top: 1px solid var(--border);
  word-break: break-word;
}
.all-distractor:first-of-type { border-top: none; padding-top: 0; }

.all-source, .all-explanation {
  margin-top: 0.55rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.45;
}
.all-explanation { color: var(--text); }

.all-pager {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.55rem 0.85rem;
  padding: 0.55rem 0.75rem;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
}
.all-pager[hidden] { display: none !important; }
.all-pager-range {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}
.all-pager-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.3rem;
}
.all-pager-pages {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.2rem;
}
.all-pager-num {
  min-width: 2rem;
  padding: 0.3rem 0.45rem;
  background: #fff;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  color: var(--text);
  font-weight: 600;
}
.all-pager-num.active,
.all-pager-num[aria-current="page"] {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent-strong);
}
.all-pager-num:disabled:not(.active) { opacity: 0.45; }
.all-pager-ellipsis {
  padding: 0 0.2rem;
  color: var(--text-muted);
  font-weight: 700;
}
.all-pager-btn { white-space: nowrap; }
.all-toolbar #allPrintBtn { margin-bottom: 0.15rem; }

@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    flex-direction: column;
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 0.5rem;
    gap: 0.15rem;
    box-shadow: var(--shadow-lg);
  }
  .nav.open { display: flex; }
  .nav a { padding: 0.65rem 0.85rem; }
  .stats { grid-template-columns: 1fr 1fr 1fr; gap: 0.4rem; }
  .stat-value { font-size: 1.15rem; }
  .mode-grid { grid-template-columns: 1fr; }
  .hero h2 { font-size: 1.15rem; }
  .all-toolbar { flex-direction: column; align-items: stretch; }
  .all-count { margin-left: 0; padding-bottom: 0; }
  .all-pair {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
  .all-pair-term {
    font-size: 0.9rem;
    padding-bottom: 0.25rem;
    border-bottom: 1px solid var(--ok-border);
  }
  .all-pager {
    flex-direction: column;
    align-items: stretch;
    gap: 0.45rem;
    padding: 0.5rem 0.6rem;
  }
  .all-pager-range { font-size: 0.8rem; text-align: center; }
  .all-pager-nav { justify-content: center; }
  .all-pager-btn { padding: 0.3rem 0.55rem; font-size: 0.78rem; }
  .all-pager-num { min-width: 1.75rem; padding: 0.28rem 0.35rem; font-size: 0.78rem; }
  .all-pager-pages { justify-content: center; }
}

@media (max-width: 400px) {
  .stats { grid-template-columns: 1fr; }
}

/* ===== Print ===== */
@media print {
  :root {
    --bg-0: #fff;
    --bg-1: #fff;
    --bg-2: #f4f6f8;
    --bg-3: #e8ecf0;
    --border: #cfd6dd;
    --text: #111;
    --text-muted: #445;
    --accent: #1e44c9;
    --accent-soft: #e8eeff;
    --accent-strong: #1e44c9;
    --ok: #14633e;
    --ok-soft: #e6f5ee;
    --shadow: none;
  }
  html, body {
    background: #fff !important;
    color: #111 !important;
  }
  .header, .footer, .nav-toggle, .all-toolbar, .all-pager, #allPrintBtn {
    display: none !important;
  }
  .app {
    width: 100%;
    padding: 0;
    min-height: 0;
  }
  .main { padding: 0; }
  .card {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
    page-break-inside: avoid;
  }
  .all-opt.is-wrong { opacity: 0.4; }
  .all-check-mark { color: #14633e; }
  a { color: inherit; text-decoration: none; }
}