:root {
  color-scheme: light;
}

/* ============================================================
   СВЕТЛАЯ ТЕМА — ОСНОВНАЯ
   ============================================================ */
[data-theme="light"] {
  --bg: #f7f3ea;
  --bg-glow-1: rgba(212, 160, 23, 0.10);
  --bg-glow-2: rgba(230, 126, 34, 0.06);

  --panel: #ffffff;
  --panel-2: #fdfbf6;
  --panel-3: #f7f1e3;

  --line: #e6dfd0;
  --line-strong: #d6ccb5;

  --text: #1f1a12;
  --muted: #8a7d63;

  --yellow: #b8860b;
  --yellow-2: #96690a;
  --yellow-soft: rgba(184, 134, 11, 0.10);

  --neon: #d97706;
  --neon-2: #b45309;
  --neon-soft: rgba(217, 119, 6, 0.10);

  --red: #c0392b;
  --red-dark: #8b1a13;
  --red-soft: rgba(192, 57, 43, 0.09);

  --green: #1e8449;
  --green-soft: rgba(30, 132, 73, 0.10);

  --shadow: 0 20px 50px rgba(120, 90, 30, 0.10);
  --shadow-sm: 0 6px 18px rgba(120, 90, 30, 0.08);
}

/* ============================================================
   ТЁМНАЯ ТЕМА — ПЕРЕКЛЮЧАЕМАЯ
   ============================================================ */
[data-theme="dark"] {
  color-scheme: dark;
  --bg: #000000;
  --bg-glow-1: rgba(255, 199, 0, 0.08);
  --bg-glow-2: rgba(255, 107, 0, 0.08);
  --panel: #0a0a0a;
  --panel-2: #111111;
  --panel-3: #1a1a1a;
  --line: #2a2a2a;
  --line-strong: #3a3a3a;
  --text: #f2e8d5;
  --muted: #9a8f78;
  --yellow: #ffc700;
  --yellow-2: #e6a800;
  --yellow-soft: rgba(255, 199, 0, 0.12);
  --neon: #ff6b00;
  --neon-2: #e65c00;
  --neon-soft: rgba(255, 107, 0, 0.15);
  --red: #ff2e4d;
  --red-dark: #a01830;
  --red-soft: rgba(255, 46, 77, 0.14);
  --green: #22c55e;
  --green-soft: rgba(34, 197, 94, 0.14);
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
  --shadow-sm: 0 6px 18px rgba(0, 0, 0, 0.5);
}

:root { --radius: 16px; }

* { box-sizing: border-box; }
html, body { min-height: 100%; }

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 15% 0%, var(--bg-glow-1), transparent 45%),
    radial-gradient(circle at 90% 100%, var(--bg-glow-2), transparent 45%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s ease, color 0.3s ease;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(184, 134, 11, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(184, 134, 11, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.6), transparent 90%);
  opacity: 0.5;
}
[data-theme="dark"] body::before {
  background-image:
    linear-gradient(rgba(255, 199, 0, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 199, 0, 0.025) 1px, transparent 1px);
  opacity: 0.7;
}

.page-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px 14px;
}

.app-card {
  width: min(100%, 1150px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  position: relative;
  overflow: hidden;
  transition: background 0.3s ease, border-color 0.3s ease;
}

.app-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--yellow) 20%, var(--neon) 80%, transparent);
  opacity: 0.6;
}

/* ===================== ХЕДЕР ===================== */
.card-top {
  display: grid;
  gap: 16px;
  margin-bottom: 18px;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
}
.title-block { grid-column: 1; grid-row: 1; }

.top-actions {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  gap: 8px;
  align-items: flex-start;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.icon-btn {
  padding: 10px 12px;
  border: 1px solid var(--line-strong);
  background: var(--panel-2);
  color: var(--text);
  font: inherit;
  font-size: 1rem;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.18s ease;
  line-height: 1;
}
.icon-btn:hover {
  border-color: var(--yellow);
  color: var(--yellow);
  background: var(--yellow-soft);
  transform: translateY(-1px);
}

.rules-btn {
  padding: 10px 18px;
  border: 1px solid var(--yellow);
  background: transparent;
  color: var(--yellow);
  font: inherit;
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.18s ease;
  white-space: nowrap;
}
.rules-btn:hover {
  background: var(--yellow);
  color: #fff;
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}
[data-theme="dark"] .rules-btn:hover { color: #000; }

.stats { grid-column: 1 / -1; grid-row: 2; }

.title-block h1 {
  margin: 4px 0 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.6rem, 2.3vw, 2.2rem);
  line-height: 1.1;
  color: var(--text);
  letter-spacing: -0.015em;
  font-weight: 700;
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--yellow);
  font-size: 0.74rem;
  font-weight: 700;
}

/* ===================== СТАТИСТИКА ===================== */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }

.stat {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 16px;
  display: grid;
  gap: 4px;
  min-height: 68px;
  transition: all 0.2s ease;
}
.stat:hover { border-color: var(--yellow); box-shadow: var(--shadow-sm); }
.stat-label {
  color: var(--muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}
.stat strong, .stat-value { font-size: 1.2rem; font-weight: 800; color: var(--text); }
.stat-value { color: var(--yellow); }

/* ===================== ВКЛАДКИ КЛАССОВ ===================== */
.grade-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}
.grade-tab {
  padding: 14px 16px;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.18s ease;
  display: grid;
  gap: 4px;
  text-align: left;
}
.grade-tab .grade-name { display: block; font-weight: 700; font-size: 0.98rem; }
.grade-tab .grade-progress {
  display: block;
  font-size: 0.78rem;
  color: var(--muted);
  font-weight: 500;
  letter-spacing: 0.02em;
}
.grade-tab:hover {
  border-color: var(--yellow);
  background: var(--panel-3);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}
.grade-tab.active {
  background: linear-gradient(180deg, var(--yellow), var(--yellow-2));
  border-color: var(--yellow);
  color: #fff;
  box-shadow: var(--shadow-sm);
  font-weight: 800;
}
.grade-tab.active .grade-progress { color: rgba(255, 255, 255, 0.85); }

/* ===================== ПРОГРЕСС ===================== */
.progress-wrap {
  height: 8px;
  background: var(--panel-3);
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 18px;
}
.progress-bar {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--neon-2), var(--neon), var(--yellow));
  transition: width 0.3s ease;
}

/* ===================== РАБОЧАЯ ОБЛАСТЬ ===================== */
.workspace {
  display: grid;
  grid-template-columns: 210px 1fr;
  gap: 18px;
  align-items: start;
}
.sidebar { position: sticky; top: 20px; }
.side-nav { display: grid; gap: 8px; }
.side-btn {
  text-align: left;
  padding: 12px 16px;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.18s ease;
}
.side-btn:hover {
  border-color: var(--neon);
  background: var(--panel-3);
  color: var(--neon);
  transform: translateX(3px);
}
.side-btn.active {
  background: linear-gradient(180deg, var(--neon), var(--neon-2));
  border-color: var(--neon);
  color: #fff;
  box-shadow: inset 4px 0 0 var(--yellow), var(--shadow-sm);
  font-weight: 800;
}

.content {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px 26px;
  min-height: 320px;
}

/* ===================== ТЕОРИЯ ===================== */
.doc { line-height: 1.75; font-size: 0.97rem; }
.doc h3 {
  font-family: Georgia, serif;
  color: var(--text);
  margin: 28px 0 10px;
  font-size: 1.2rem;
  line-height: 1.3;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--yellow-soft);
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}
.doc h3::before { content: "▸"; color: var(--neon); font-size: 1rem; line-height: 1; }
.doc h3:first-child { margin-top: 0; }
.doc ul { padding-left: 0; margin: 10px 0; list-style: none; }
.doc ul li { position: relative; padding-left: 28px; margin-bottom: 8px; line-height: 1.7; }
.doc ul li::before {
  content: "◆"; position: absolute; left: 4px; top: 0;
  color: var(--yellow); font-size: 0.7rem; line-height: 1.9;
}
.doc ol { padding-left: 0; margin: 10px 0; list-style: none; counter-reset: doc-counter; }
.doc ol li {
  position: relative; padding-left: 40px; margin-bottom: 10px;
  line-height: 1.7; counter-increment: doc-counter;
}
.doc ol li::before {
  content: counter(doc-counter);
  position: absolute; left: 0; top: 2px;
  width: 28px; height: 28px;
  display: grid; place-items: center;
  background: linear-gradient(180deg, var(--neon), var(--neon-2));
  color: #fff; border-radius: 50%;
  font-size: 0.82rem; font-weight: 800;
  box-shadow: var(--shadow-sm);
}
.doc p { margin: 10px 0; }
.doc b { color: var(--yellow); font-weight: 700; }
.doc i { color: var(--neon); font-style: italic; font-weight: 500; }
.doc .tip {
  background: var(--yellow-soft);
  border-left: 3px solid var(--yellow);
  padding: 14px 18px 14px 46px;
  border-radius: 8px; margin: 20px 0;
  position: relative; line-height: 1.7;
}
.doc .tip::before { content: "💡"; position: absolute; left: 16px; top: 14px; font-size: 1.05rem; }
.doc .tip b { color: var(--yellow); }
.doc .warn {
  background: var(--red-soft);
  border-left: 3px solid var(--red);
  padding: 14px 18px 14px 46px;
  border-radius: 8px; margin: 20px 0;
  position: relative; line-height: 1.7;
}
.doc .warn::before {
  content: "⚠"; position: absolute; left: 16px; top: 14px;
  font-size: 1.05rem; color: var(--red);
}
.doc .warn b { color: var(--red); }
.doc .warn ul { margin: 6px 0; }

/* ===================== ЗАДАНИЕ ===================== */
.task { display: grid; gap: 20px; }
.task-pos {
  display: inline-block;
  color: var(--neon);
  background: var(--neon-soft);
  border: 1px solid var(--neon);
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 0.72rem;
  margin: 0;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.task-title {
  margin: 10px 0 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.55rem;
  line-height: 1.25;
  color: var(--text);
  font-weight: 700;
  letter-spacing: -0.01em;
}

/* ===================== ТЕКСТ ===================== */
.text-fragment {
  position: relative;
  padding: 30px 34px 28px 34px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 4px solid var(--yellow);
  border-radius: 12px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.04rem;
  line-height: 1.9;
  white-space: pre-line;
  color: var(--text);
  letter-spacing: 0.003em;
  box-shadow: var(--shadow-sm);
}
.text-fragment::before {
  content: "«"; position: absolute; top: -6px; left: 14px;
  font-family: Georgia, serif; font-size: 3rem;
  color: var(--yellow); opacity: 0.5; line-height: 1; pointer-events: none;
}
.text-fragment::after {
  content: "»"; position: absolute; bottom: -22px; right: 16px;
  font-family: Georgia, serif; font-size: 3rem;
  color: var(--yellow); opacity: 0.5; line-height: 1; pointer-events: none;
}
.text-fragment { text-indent: 1.6em; }
.text-fragment::first-line { text-indent: 0; }
.text-fragment::first-letter {
  font-family: Georgia, serif;
  font-size: 3.2em; font-weight: 700;
  color: var(--yellow);
  float: left; line-height: 0.82;
  margin: 6px 10px 0 0;
  padding-right: 2px;
}

.task-instruction {
  color: var(--neon);
  font-style: italic;
  margin: 0;
  font-weight: 600;
  font-size: 0.98rem;
  line-height: 1.6;
  padding-left: 16px;
  border-left: 3px solid var(--neon);
}

/* ===================== УТВЕРЖДЕНИЯ ===================== */
.statements { display: grid; gap: 10px; }
.statement {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 14px;
  padding: 16px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  font: inherit;
  font-size: 0.97rem;
  line-height: 1.65;
  text-align: left;
  cursor: pointer;
  transition: all 0.18s ease;
}
.statement:hover {
  border-color: var(--yellow);
  transform: translateX(3px);
  box-shadow: -4px 0 0 var(--neon), var(--shadow-sm);
}
.statement .stmt-num {
  display: grid; place-items: center;
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--panel-3);
  color: var(--yellow);
  font-weight: 800; font-size: 0.92rem;
  border: 1.5px solid var(--yellow);
  flex-shrink: 0;
}
.statement .stmt-text { padding-top: 3px; }

.statement.selected {
  border-color: var(--yellow);
  background: var(--yellow-soft);
  box-shadow: 0 0 0 1px var(--yellow), -4px 0 0 var(--neon), var(--shadow-sm);
}
.statement.selected .stmt-num { background: var(--yellow); color: #fff; }
[data-theme="dark"] .statement.selected .stmt-num { color: #000; }

.statement.correct {
  border-color: var(--green);
  background: var(--green-soft);
  box-shadow: -4px 0 0 var(--green);
}
.statement.correct .stmt-num {
  background: var(--green); color: #fff; border-color: var(--green);
}

.statement.wrong {
  border-color: var(--red);
  background: var(--red-soft);
  box-shadow: -4px 0 0 var(--red);
}
.statement.wrong .stmt-num {
  background: var(--red); color: #fff; border-color: var(--red);
}

.statement.missed {
  border-color: var(--green);
  border-style: dashed;
  background: transparent;
}
.statement:disabled { cursor: default; transform: none; }
.statement:disabled:hover { transform: none; box-shadow: none; }

/* ===================== РАЗБОР ===================== */
.breakdown {
  display: grid; gap: 10px;
  padding: 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
}
.breakdown h3 {
  margin: 0 0 6px;
  font-family: Georgia, serif;
  color: var(--text);
  font-size: 1.18rem;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line-strong);
  font-weight: 700;
}
.bd-item {
  padding: 14px 18px 14px 48px;
  border-radius: 8px;
  border-left: 4px solid var(--line);
  background: var(--panel-2);
  line-height: 1.65;
  position: relative;
}
.bd-item::before {
  position: absolute; left: 16px; top: 14px;
  font-size: 1rem; font-weight: 800; line-height: 1.2;
}
.bd-item.ok { border-left-color: var(--green); background: var(--green-soft); }
.bd-item.ok::before { content: "✔"; color: var(--green); }
.bd-item.no { border-left-color: var(--red); background: var(--red-soft); }
.bd-item.no::before { content: "✖"; color: var(--red); }
.bd-item b { color: var(--yellow); font-weight: 700; }
.bd-item.ok b { color: var(--green); }
.bd-item.no b { color: var(--red); }
.bd-item .why {
  color: var(--muted); font-size: 0.93rem;
  margin-top: 6px; line-height: 1.6; font-style: italic;
}
.bd-item .why::before {
  content: "→ "; color: var(--yellow); font-style: normal; font-weight: 700;
}

/* ===================== КНОПКИ ===================== */
.task-actions { display: flex; justify-content: flex-end; gap: 10px; }

.primary-btn {
  padding: 13px 28px;
  border-radius: 10px;
  border: 1px solid var(--neon);
  background: linear-gradient(180deg, var(--neon), var(--neon-2));
  color: #fff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.18s ease;
  letter-spacing: 0.02em;
  box-shadow: var(--shadow-sm);
}
.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(217, 119, 6, 0.25);
}

.primary-btn.gold {
  background: linear-gradient(180deg, var(--yellow), var(--yellow-2));
  border-color: var(--yellow);
  color: #fff;
}
[data-theme="dark"] .primary-btn.gold { color: #000; }
.primary-btn.gold:hover { box-shadow: 0 14px 28px rgba(184, 134, 11, 0.3); }

.primary-btn.danger {
  background: linear-gradient(180deg, var(--red), var(--red-dark));
  border-color: var(--red);
}
.primary-btn.danger:hover { box-shadow: 0 14px 28px rgba(192, 57, 43, 0.3); }

/* Отключённая кнопка (Проверить, пока ничего не выбрано) */
.primary-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
  filter: grayscale(0.5);
}

.hidden { display: none !important; }

/* ===================== ФИНАЛ ===================== */
.final { text-align: center; display: grid; gap: 20px; padding: 16px; }
.final h2 {
  font-family: Georgia, serif;
  color: var(--text);
  margin: 0;
  font-size: 1.9rem;
  font-weight: 700;
}
.final-score {
  font-size: 1.15rem;
  line-height: 1.9;
  color: var(--text);
  margin: 0;
}
.final-score b {
  color: var(--yellow);
  font-size: 1.25em;
  font-weight: 800;
}
.final .task-actions { justify-content: center; flex-wrap: wrap; }

/* ===================== ТАБЛИЦА СТАТИСТИКИ ===================== */
.stats-block-title {
  font-family: Georgia, serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  text-align: left;
  margin: 8px 0 0;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--yellow-soft);
}

.topic-stats {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  text-align: left;
  margin-top: 8px;
  font-size: 0.95rem;
}
.topic-stats th {
  background: var(--panel-3);
  color: var(--muted);
  padding: 12px 16px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
  text-align: left;
  border-bottom: 1px solid var(--line);
}
.topic-stats td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
}
.topic-stats tr:last-child td { border-bottom: none; }
.topic-stats .tag-name { font-weight: 600; }
.topic-stats .tag-bar-cell { width: 40%; }
.topic-stats .tag-bar {
  height: 8px;
  background: var(--line);
  border-radius: 999px;
  overflow: hidden;
}
.topic-stats .tag-bar-inner {
  height: 100%;
  background: linear-gradient(90deg, var(--neon-2), var(--neon), var(--yellow));
  border-radius: 999px;
  transition: width 0.6s ease;
}
.topic-stats .tag-good { color: var(--green); font-weight: 800; }
.topic-stats .tag-mid { color: var(--neon); font-weight: 800; }
.topic-stats .tag-bad { color: var(--red); font-weight: 800; }
.topic-stats .tag-note {
  color: var(--muted);
  font-size: 0.82rem;
  font-style: italic;
}

/* ===================== МОДАЛКА ===================== */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(30, 20, 5, 0.55);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: grid; place-items: center;
  z-index: 100; padding: 20px;
  animation: fadeIn 0.2s ease;
}
[data-theme="dark"] .modal-overlay { background: rgba(0, 0, 0, 0.85); }

.modal {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  width: min(100%, 720px);
  max-height: 88vh;
  display: flex; flex-direction: column;
  box-shadow: var(--shadow);
  animation: modalIn 0.25s ease;
  overflow: hidden;
}
.modal::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--yellow), var(--neon), transparent);
}
.modal-header {
  padding: 22px 26px;
  border-bottom: 1px solid var(--line);
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.modal-header h2 {
  margin: 0;
  font-family: Georgia, serif;
  color: var(--text);
  font-size: 1.45rem;
  font-weight: 700;
}
.modal-close {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text);
  width: 40px; height: 40px;
  border-radius: 10px; cursor: pointer;
  font-size: 1.1rem; line-height: 1;
  transition: all 0.15s;
  display: grid; place-items: center;
}
.modal-close:hover {
  border-color: var(--neon);
  color: var(--neon);
  background: var(--neon-soft);
}
.modal-body { padding: 26px; overflow-y: auto; line-height: 1.75; }
.modal-body h3 {
  color: var(--neon);
  margin: 22px 0 8px;
  font-size: 1.03rem;
  display: flex; align-items: center; gap: 10px;
  font-weight: 700;
}
.modal-body h3::before { content: "▸"; color: var(--yellow); font-size: 0.95rem; }
.modal-body h3:first-child { margin-top: 0; }
.modal-body p { margin: 8px 0; }
.modal-body b { color: var(--yellow); font-weight: 700; }
.modal-body ul { padding-left: 0; list-style: none; margin: 8px 0; }
.modal-body ul li { position: relative; padding-left: 26px; margin-bottom: 6px; }
.modal-body ul li::before {
  content: "◆"; position: absolute; left: 4px; top: 0;
  color: var(--yellow); font-size: 0.7rem; line-height: 1.9;
}
.modal-body .tip {
  background: var(--yellow-soft);
  border-left: 3px solid var(--yellow);
  padding: 14px 18px 14px 46px;
  border-radius: 8px;
  margin-top: 22px;
  position: relative;
}
.modal-body .tip::before { content: "💡"; position: absolute; left: 16px; top: 14px; font-size: 1.05rem; }
.modal-body .tip b { color: var(--yellow); }
.modal-body .modal-actions {
  display: flex; justify-content: flex-end; gap: 10px;
  margin-top: 24px; flex-wrap: wrap;
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes modalIn {
  from { opacity: 0; transform: translateY(14px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--yellow);
  outline-offset: 3px;
}

/* ===================== МОБИЛЬНЫЙ ===================== */
@media (max-width: 760px) {
  .app-card { padding: 18px; }
  .workspace { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .side-nav { grid-template-columns: repeat(3, 1fr); }
  .side-btn { text-align: center; padding: 10px 8px; font-size: 0.88rem; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stat.wide { grid-column: 1 / -1; }
  .grade-tabs { grid-template-columns: 1fr; }
  .card-top { grid-template-columns: 1fr; }
  .top-actions { grid-column: 1; grid-row: 2; justify-content: flex-start; }
  .stats { grid-row: 3; }
  .text-fragment { padding: 24px 22px 24px 22px; font-size: 0.98rem; }
  .text-fragment::first-letter { font-size: 2.6em; }
  .statement { grid-template-columns: 34px 1fr; padding: 14px 16px; gap: 10px; }
  .statement .stmt-num { width: 28px; height: 28px; font-size: 0.82rem; }
  .content { padding: 20px 18px; }
  .topic-stats { font-size: 0.85rem; }
  .topic-stats th, .topic-stats td { padding: 10px 12px; }
}
/* ============================================================
   ДОПОЛНЕНИЯ: ДНЕВНИК, ТРЕНАЖЁР, ПОДСКАЗКИ, РАСКРЫТИЕ
   ============================================================ */

/* ===== Тренажёр слабых тем на экране выбора ===== */
.weak-trainer-block {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  padding: 20px;
  margin: 18px 0;
  background: linear-gradient(180deg, var(--yellow-soft), transparent 80%);
  border: 1px solid var(--yellow);
  border-radius: 14px;
  align-items: start;
}
.weak-trainer-icon {
  font-size: 2.4rem;
  line-height: 1;
}
.weak-trainer-content h4 {
  margin: 0 0 6px;
  font-family: Georgia, serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
}
.weak-trainer-content p { margin: 6px 0; }
.weak-trainer-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 10px 0;
}
.weak-tag {
  padding: 4px 10px;
  background: var(--panel);
  border: 1px solid var(--yellow);
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--yellow);
}
.weak-trainer-content .primary-btn {
  margin-top: 8px;
}

/* ===== Кнопка «Выйти из тренажёра» ===== */
.side-btn.trainer-exit {
  border-color: var(--red);
  color: var(--red);
  margin-top: 10px;
}
.side-btn.trainer-exit:hover {
  background: var(--red-soft);
  color: var(--red);
}

/* ===== Горячие клавиши ===== */
kbd {
  display: inline-block;
  padding: 1px 7px;
  font-family: "SF Mono", Consolas, monospace;
  font-size: 0.85em;
  font-weight: 700;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 5px;
  line-height: 1.4;
}
.hotkeys-hint {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  margin-top: 18px;
  padding: 12px 16px;
  background: var(--panel-3);
  border-radius: 10px;
  font-size: 0.9rem;
  color: var(--muted);
}
.hotkeys-hint b { color: var(--text); }
.hotkey-inline-hint {
  margin: -4px 0 0;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: right;
}

/* ===== Умная подсказка (инлайн) ===== */
.smart-hint-inline {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 14px 18px;
  background: var(--yellow-soft);
  border-left: 4px solid var(--yellow);
  border-radius: 10px;
  font-size: 0.95rem;
}
.smart-hint-icon {
  font-size: 1.4rem;
  line-height: 1;
}
.smart-hint-text { flex: 1; min-width: 180px; }
.smart-hint-inline .primary-btn {
  padding: 8px 16px;
  font-size: 0.88rem;
}

/* ===== Раскрывающийся разбор ===== */
.bd-hint {
  display: block;
  margin-top: 6px;
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--muted);
  font-style: italic;
  letter-spacing: 0.01em;
}
.bd-item.collapsed .bd-why { display: none; }
.bd-item[data-bdnum] {
  cursor: pointer;
  transition: background 0.15s ease;
}
.bd-item[data-bdnum]:hover {
  background: var(--panel-3);
}
.bd-item-head {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.bd-item-text { flex: 1; }
.bd-icon {
  font-size: 1rem;
  line-height: 1.2;
}
.bd-toggle {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--muted);
  transition: transform 0.2s ease;
  line-height: 1;
  margin-left: auto;
  padding-left: 8px;
}
.bd-item:not(.collapsed) .bd-toggle { transform: rotate(45deg); }

/* Отменяем старый ::before — теперь иконка через span */
.bd-item.ok::before,
.bd-item.no::before { content: none; }
.bd-item.ok { border-left-color: var(--green); background: var(--green-soft); }
.bd-item.no { border-left-color: var(--red); background: var(--red-soft); }
.bd-item.ok .bd-icon { color: var(--green); }
.bd-item.no .bd-icon { color: var(--red); }
.bd-item.ok b { color: var(--green); }
.bd-item.no b { color: var(--red); }
.bd-item .bd-why {
  margin-top: 8px;
  padding-left: 26px;
  color: var(--muted);
  font-size: 0.93rem;
  font-style: italic;
  line-height: 1.6;
}
.bd-item .bd-why::before {
  content: "→ ";
  color: var(--yellow);
  font-style: normal;
  font-weight: 700;
}
.bd-summary {
  cursor: default;
  background: var(--green-soft);
  border-left-color: var(--green);
}

/* ===== Дневник ошибок ===== */
.error-diary-intro {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 0.95rem;
}
.error-diary-grade {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 22px 0 10px;
  font-family: Georgia, serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  padding-bottom: 6px;
  border-bottom: 2px solid var(--yellow-soft);
}
.error-diary-count {
  display: inline-block;
  padding: 1px 9px;
  background: var(--yellow-soft);
  color: var(--yellow);
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  font-family: Inter, sans-serif;
}
.error-list { display: grid; gap: 8px; }
.error-item {
  padding: 12px 16px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.error-item:hover {
  border-color: var(--yellow);
  background: var(--panel-3);
}
.error-item-head {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.error-item-task {
  font-weight: 700;
  font-size: 0.94rem;
  color: var(--text);
}
.error-item-num {
  padding: 2px 8px;
  background: var(--yellow-soft);
  color: var(--yellow);
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
}
.error-item-toggle {
  margin-left: auto;
  color: var(--muted);
  font-weight: 800;
  font-size: 1.1rem;
  transition: transform 0.2s ease;
}
.error-item:not(.collapsed) .error-item-toggle {
  transform: rotate(45deg);
}
.error-item-stmt {
  margin-top: 8px;
  color: var(--text);
  font-size: 0.92rem;
  line-height: 1.55;
}
.error-item-why {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--line-strong);
  color: var(--muted);
  font-size: 0.9rem;
  font-style: italic;
  line-height: 1.6;
}
.error-item-why::before {
  content: "→ ";
  color: var(--yellow);
  font-style: normal;
  font-weight: 700;
}
.error-item.collapsed .error-item-why { display: none; }

.error-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--muted);
}
.error-empty-icon {
  font-size: 3.5rem;
  margin-bottom: 12px;
}
.error-empty p {
  font-size: 1.05rem;
  margin: 0;
}

/* ===== Мобильный ===== */
@media (max-width: 760px) {
  .weak-trainer-block {
    grid-template-columns: 1fr;
    text-align: left;
  }
  .weak-trainer-icon { font-size: 2rem; }
  .hotkeys-hint {
    font-size: 0.82rem;
    gap: 10px;
  }
  .hotkey-inline-hint { text-align: left; }
  .smart-hint-inline { padding: 12px 14px; }
  .smart-hint-inline .primary-btn {
    width: 100%;
    padding: 10px 16px;
  }
}