/* «Могну» — онлайн-школа.
   Пять тем оформления: тетрадь, миллиметровка, мел, чертёж, ночь.
   Тема выбирается в профиле; «авто» следует настройке системы. */
:root, [data-theme="paper"] {
  --paper: #FBFCFE; --grid: #E4EBF5; --grid-major: transparent;
  --surface: #FFFFFF; --surface-2: #F3F6FB; --line: #D5DEEB;
  --ink: #1D3C8C; --ink-hover: #163071; --ink-soft: #E7EDFA; --on-ink: #FFFFFF;
  --text: #232733; --muted: #646B7A;
  --pen: #CC3340; --pen-soft: #FCEBEC; --margin: #CC3340;
  --ok: #24724A; --ok-soft: #E5F3EB; --warn: #9A6212; --warn-soft: #FBF1DE;
  --fig-accent: #D9822B; --cell: 22px;
  color-scheme: light;
}
[data-theme="graph"] {
  --paper: #FCFBF6; --grid: #F1E3CF; --grid-major: #E6C9A3;
  --surface: #FFFEFA; --surface-2: #F7F2E8; --line: #E4D8C4;
  --ink: #1F6B5C; --ink-hover: #17544A; --ink-soft: #E2F0EC; --on-ink: #FFFFFF;
  --text: #2A2620; --muted: #6E665A;
  --pen: #C2410C; --pen-soft: #FBEBDD; --margin: transparent;
  --ok: #2F7D32; --ok-soft: #E6F2E3; --warn: #8A5A00; --warn-soft: #FAF0D7;
  --fig-accent: #C2410C; --cell: 10px;
  color-scheme: light;
}
[data-theme="chalk"] {
  --paper: #1F2E28; --grid: rgba(255,255,255,.035); --grid-major: transparent;
  --surface: #263832; --surface-2: #2D423B; --line: #3B544B;
  --ink: #F2D66B; --ink-hover: #FFE58A; --ink-soft: #3A4A36; --on-ink: #1F2E28;
  --text: #EDF1EC; --muted: #A9B8B0;
  --pen: #FF9A8B; --pen-soft: #4A3330; --margin: transparent;
  --ok: #9BE0A8; --ok-soft: #2C4A36; --warn: #F2C46B; --warn-soft: #4A4128;
  --fig-accent: #F2D66B; --cell: 26px;
  color-scheme: dark;
}
[data-theme="blueprint"] {
  --paper: #123A63; --grid: rgba(190,220,255,.12); --grid-major: rgba(190,220,255,.22);
  --surface: #164675; --surface-2: #1B5285; --line: #2C639B;
  --ink: #FFFFFF; --ink-hover: #DCEBFF; --ink-soft: #24609A; --on-ink: #123A63;
  --text: #EAF3FF; --muted: #A9C6E8;
  --pen: #FFB86B; --pen-soft: #4A4140; --margin: transparent;
  --ok: #8CE3B5; --ok-soft: #1E5A55; --warn: #FFD27A; --warn-soft: #4A4A3A;
  --fig-accent: #FFB86B; --cell: 20px;
  color-scheme: dark;
}
[data-theme="night"] {
  --paper: #121620; --grid: #1A2030; --grid-major: transparent;
  --surface: #191F2C; --surface-2: #202838; --line: #2C3549;
  --ink: #9DB2FF; --ink-hover: #BCCBFF; --ink-soft: #232D4A; --on-ink: #10142A;
  --text: #E5E8EF; --muted: #9CA3B4;
  --pen: #FF7A84; --pen-soft: #3A2026; --margin: #FF7A84;
  --ok: #6CCB97; --ok-soft: #1B3328; --warn: #E8B45C; --warn-soft: #3A2E18;
  --fig-accent: #F0A24A; --cell: 22px;
  color-scheme: dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --paper: #121620; --grid: #1A2030; --grid-major: transparent;
    --surface: #191F2C; --surface-2: #202838; --line: #2C3549;
    --ink: #9DB2FF; --ink-hover: #BCCBFF; --ink-soft: #232D4A; --on-ink: #10142A;
    --text: #E5E8EF; --muted: #9CA3B4;
    --pen: #FF7A84; --pen-soft: #3A2026; --margin: #FF7A84;
    --ok: #6CCB97; --ok-soft: #1B3328; --warn: #E8B45C; --warn-soft: #3A2E18;
    --fig-accent: #F0A24A;
    color-scheme: dark;
  }
}
:root {
  --radius: 6px;
  --font: 'Golos Text', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'Cascadia Mono', monospace;
  --hand: 'Caveat', 'Segoe Print', cursive;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font: 16px/1.55 var(--font);
  color: var(--text);
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid-major) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-major) 1px, transparent 1px),
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: calc(var(--cell) * 5) calc(var(--cell) * 5), calc(var(--cell) * 5) calc(var(--cell) * 5), var(--cell) var(--cell), var(--cell) var(--cell);
}
a { color: var(--ink); text-underline-offset: 3px; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; font-weight: 600; }
h1 { font-size: 1.75rem; letter-spacing: -0.01em; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.05rem; }
p { margin: 0 0 .75em; }
code, pre, kbd { font-family: var(--mono); font-size: .9em; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; border-radius: 3px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- каркас ---------- */
.shell { display: grid; grid-template-columns: 236px 1fr; min-height: 100vh; }
.side {
  position: sticky; top: 0; height: 100vh;
  background: var(--surface);
  border-right: 1px solid var(--line);
  display: flex; flex-direction: column;
  padding: 20px 14px;
}
.brand { display: flex; align-items: center; gap: 10px; padding: 0 8px 20px; text-decoration: none; color: var(--text); }
.brand img { width: 30px; height: 30px; }
.brand b { font-size: 1.2rem; font-weight: 600; }
.nav { display: flex; flex-direction: column; gap: 2px; }
.nav a {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px; border-radius: var(--radius);
  color: var(--text); text-decoration: none; font-weight: 500;
}
.nav a:hover { background: var(--surface-2); }
.nav a[aria-current="page"] { background: var(--ink-soft); color: var(--ink); }
.nav svg { width: 18px; height: 18px; flex: none; }
.nav .count { margin-left: auto; background: var(--pen); color: #fff; border-radius: 10px; font-size: .75rem; padding: 0 7px; line-height: 18px; }
.side-foot { margin-top: auto; padding: 12px 8px 0; border-top: 1px solid var(--line); font-size: .9rem; }
.side-foot .who { font-weight: 600; }
.side-foot .role { color: var(--muted); }

.main { position: relative; min-width: 0; }
/* красная линия полей, как в тетради */
.main::before {
  content: ''; position: absolute; top: 0; bottom: 0; left: calc(var(--cell) * 2);
  border-left: 2px solid var(--margin); opacity: .55; pointer-events: none;
}
.page { max-width: 920px; padding: calc(var(--cell) * 2) 32px 64px calc(var(--cell) * 3); }
.page.wide { max-width: 1240px; }
.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.page-head h1 { margin: 0; }
.page-head .sub { color: var(--muted); margin: 4px 0 0; }

.topbar { display: none; }

@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; }
  .side {
    position: fixed; inset: 0 auto 0 0; width: 260px; z-index: 40;
    transform: translateX(-100%); transition: transform .2s ease;
  }
  .side.open { transform: none; box-shadow: 0 0 0 100vmax rgba(10, 15, 30, .35); }
  .topbar {
    display: flex; align-items: center; gap: 10px; position: sticky; top: 0; z-index: 30;
    background: var(--surface); border-bottom: 1px solid var(--line); padding: 8px 12px;
  }
  .topbar b { font-weight: 600; }
  .main::before { left: 20px; }
  .page { padding: 20px 16px 48px 34px; }
}

/* ---------- элементы ---------- */
.sheet {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
}
.sheet + .sheet { margin-top: 16px; }
.sheet-title { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.sheet-title h2 { margin: 0; }
.stack > * + * { margin-top: 16px; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }
.muted { color: var(--muted); }
.small { font-size: .875rem; }
.empty { color: var(--muted); padding: 18px 0 4px; }
.empty b { color: var(--text); display: block; margin-bottom: 4px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 38px; padding: 0 16px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); color: var(--text);
  font: inherit; font-weight: 500; cursor: pointer; text-decoration: none; white-space: nowrap;
}
.btn:hover { background: var(--surface-2); }
.btn.primary { background: var(--ink); border-color: var(--ink); color: var(--on-ink); }
.btn.primary:hover { background: var(--ink-hover); }
.btn.danger { color: var(--pen); }
.btn.danger:hover { background: var(--pen-soft); }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.small { min-height: 30px; padding: 0 10px; font-size: .875rem; }
.btn[disabled] { opacity: .55; cursor: default; }
.icon-btn { width: 38px; padding: 0; }

label.field { display: block; }
label.field > span { display: block; font-size: .875rem; font-weight: 500; margin-bottom: 4px; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=search],
input[type=datetime-local], input[type=date], select, textarea {
  width: 100%; font: inherit; color: var(--text);
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 8px 10px; min-height: 38px;
}
textarea { resize: vertical; min-height: 90px; }
textarea.mono, input.mono { font-family: var(--mono); font-size: .9rem; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--ink); outline-offset: -1px; border-color: transparent; }
.check { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; }
.check input { width: 18px; height: 18px; accent-color: var(--ink); }
.form { display: grid; gap: 14px; }
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }
.error-text { color: var(--pen); font-size: .9rem; }

.tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: .8rem; font-weight: 500; border-radius: 4px; padding: 1px 8px;
  background: var(--surface-2); color: var(--muted); white-space: nowrap;
}
.tag.math { background: var(--ink-soft); color: var(--ink); }
.tag.cs { background: var(--ok-soft); color: var(--ok); }
.tag.ok { background: var(--ok-soft); color: var(--ok); }
.tag.warn { background: var(--warn-soft); color: var(--warn); }
.tag.bad { background: var(--pen-soft); color: var(--pen); }

/* «красная ручка»: оценки и замечания репетитора */
.mark { font-family: var(--hand); color: var(--pen); font-size: 1.6rem; line-height: 1; font-weight: 600; white-space: nowrap; }
.mark.big { font-size: 2.6rem; }
.mark small { font-size: .65em; opacity: .8; }
.pen-note {
  font-family: var(--hand); font-size: 1.35rem; line-height: 1.2; color: var(--pen);
  border-left: 2px solid var(--pen); padding: 2px 0 2px 12px; margin-top: 10px; white-space: pre-wrap;
}

.bar { height: 6px; background: var(--surface-2); border-radius: 3px; overflow: hidden; }
.bar > i { display: block; height: 100%; background: var(--ink); border-radius: 3px; }

/* списки */
.list { list-style: none; margin: 0; padding: 0; }
.list > li { display: flex; align-items: center; gap: 14px; padding: 12px 0; border-top: 1px solid var(--line); }
.list > li:first-child { border-top: 0; }
.list .grow { flex: 1; min-width: 0; }
.list .title { font-weight: 600; color: var(--text); text-decoration: none; }
a.title:hover { color: var(--ink); text-decoration: underline; }
.list .meta { color: var(--muted); font-size: .875rem; }

/* таблицы */
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: .95rem; }
th, td { padding: 9px 10px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { font-weight: 600; font-size: .85rem; color: var(--muted); }
td.num, th.num { text-align: center; }
.gradebook th.lesson { min-width: 120px; max-width: 160px; font-weight: 500; color: var(--text); }
.gradebook td.cell { text-align: center; }
.gradebook td.cell a { text-decoration: none; }
.gradebook td.na { color: var(--line); }

/* ---------- урок ---------- */
.prose { max-width: 72ch; }
.prose h1, .prose h2, .prose h3 { margin-top: 1.2em; }
.prose > :first-child { margin-top: 0; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose blockquote { margin: 0 0 .75em; padding: 6px 14px; border-left: 3px solid var(--ink); background: var(--ink-soft); border-radius: 0 var(--radius) var(--radius) 0; }
.prose pre { background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; overflow-x: auto; }
.prose :not(pre) > code { background: var(--surface-2); padding: 1px 5px; border-radius: 4px; }
.prose table { width: auto; margin-bottom: .75em; }
.prose img { max-width: 100%; }
.katex-display { overflow-x: auto; overflow-y: hidden; padding: 4px 0; }

.task { position: relative; }
.task-head { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.task-num {
  width: 30px; height: 30px; flex: none; display: grid; place-items: center;
  border: 1.5px solid var(--ink); border-radius: 50%; color: var(--ink); font-weight: 600; font-size: .9rem;
}
.task-num.done { background: var(--ink); color: var(--on-ink); }
.task .mark { margin-left: auto; }
.answer-row { display: flex; gap: 10px; margin-top: 12px; }
.answer-row input { max-width: 320px; }
.verdict { margin-top: 10px; font-weight: 500; }
.verdict.ok { color: var(--ok); }
.verdict.bad { color: var(--pen); }

/* код */
.CodeMirror {
  height: auto; min-height: 140px; font-family: var(--mono); font-size: 14px; line-height: 1.5;
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface);
  color: var(--text);
}
.CodeMirror-scroll { min-height: 140px; max-height: 480px; }
.CodeMirror-gutters { background: var(--surface-2); border-right: 1px solid var(--line); }
.CodeMirror-linenumber { color: var(--muted); }
.CodeMirror-cursor { border-left-color: var(--text); }
.CodeMirror-selected { background: var(--ink-soft) !important; }
.cm-s-default .cm-keyword { color: #8a3ab9; }
.cm-s-default .cm-def, .cm-s-default .cm-variable-2 { color: var(--ink); }
.cm-s-default .cm-string { color: #24724A; }
.cm-s-default .cm-number { color: #b35400; }
.cm-s-default .cm-comment { color: var(--muted); font-style: italic; }
.cm-s-default .cm-builtin { color: #0b6e8a; }
/* тёмные темы: атрибут data-dark ставит app.js */
[data-dark] .cm-s-default .cm-keyword { color: #d39bff; }
[data-dark] .cm-s-default .cm-string { color: #8fd6a8; }
[data-dark] .cm-s-default .cm-number { color: #ffb36b; }
[data-dark] .cm-s-default .cm-builtin { color: #6fd0ea; }
[data-dark] .cm-s-default .cm-variable, [data-dark] .cm-s-default .cm-operator, [data-dark] .cm-s-default .cm-property { color: var(--text); }
[data-dark] .CodeMirror-matchingbracket { color: var(--ok) !important; }
.console {
  font-family: var(--mono); font-size: .85rem; white-space: pre-wrap; word-break: break-word;
  background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 10px 12px; min-height: 44px; max-height: 320px; overflow: auto; margin: 0;
}
.console .err { color: var(--pen); }
.tests { display: grid; gap: 8px; margin-top: 10px; }
.test {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 8px 12px; font-size: .9rem;
  display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; align-items: start;
}
.test .io { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 8px; }
.test pre { margin: 2px 0 0; font-size: .8rem; background: var(--surface-2); padding: 4px 8px; border-radius: 4px; white-space: pre-wrap; max-height: 140px; overflow: auto; }
.test.ok { border-color: var(--ok); }
.test.bad { border-color: var(--pen); }
.runner-status { font-size: .85rem; color: var(--muted); }

/* редактор урока */
.editor-tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 12px; }
.editor-tabs button { font: inherit; background: none; border: 0; padding: 8px 12px; cursor: pointer; color: var(--muted); border-bottom: 2px solid transparent; margin-bottom: -1px; }
.editor-tabs button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--ink); font-weight: 500; }
.task-editor { border: 1px dashed var(--line); border-radius: var(--radius); padding: 14px; background: var(--surface); }
.task-editor + .task-editor { margin-top: 12px; }
.test-edit { display: grid; grid-template-columns: 1fr 1fr auto; gap: 8px; align-items: start; margin-top: 8px; }
.test-edit textarea { min-height: 60px; }
.hint { font-size: .85rem; color: var(--muted); }

/* расписание */
.week { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 8px; }
.day { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); min-height: 150px; padding: 8px; }
.day.today { border-color: var(--ink); box-shadow: inset 0 3px 0 var(--ink); }
.day-head { font-size: .85rem; color: var(--muted); margin-bottom: 6px; display: flex; justify-content: space-between; }
.day-head b { color: var(--text); font-weight: 600; }
.meet {
  display: block; width: 100%; text-align: left; font: inherit; font-size: .85rem; cursor: pointer;
  background: var(--ink-soft); color: var(--text); border: 0; border-left: 3px solid var(--ink);
  border-radius: 4px; padding: 6px 8px; margin-bottom: 6px;
}
.meet b { display: block; font-weight: 600; color: var(--ink); }
.meet.past { opacity: .6; }
@media (max-width: 860px) {
  .week { grid-template-columns: 1fr; }
  .day { min-height: 0; }
}
.next-meeting { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
.next-meeting .when { font-family: var(--hand); color: var(--ink); font-size: 2rem; line-height: 1; font-weight: 600; }

/* модальные окна и уведомления */
dialog {
  border: 1px solid var(--line); border-radius: 8px; padding: 0; width: min(560px, calc(100vw - 24px));
  background: var(--surface); color: var(--text); max-height: calc(100vh - 40px);
}
dialog::backdrop { background: rgba(10, 15, 30, .45); }
.dlg-body { padding: 20px 22px; overflow-y: auto; max-height: calc(100vh - 140px); }
.dlg-foot { display: flex; justify-content: flex-end; gap: 10px; padding: 12px 22px; border-top: 1px solid var(--line); background: var(--surface-2); }
.pick-list { max-height: 220px; overflow-y: auto; border: 1px solid var(--line); border-radius: var(--radius); padding: 6px 10px; display: grid; gap: 4px; }

#toasts { position: fixed; bottom: 16px; right: 16px; display: grid; gap: 8px; z-index: 100; }
.toast {
  background: var(--text); color: var(--paper); border-radius: var(--radius);
  padding: 10px 14px; max-width: 360px; font-size: .95rem;
  animation: toast-in .18s ease-out;
}
.toast.error { background: var(--pen); color: #fff; }
@keyframes toast-in { from { transform: translateY(8px); opacity: 0; } }

/* вход */
.auth { min-height: 100vh; display: grid; place-items: center; padding: 24px 16px; }
.auth-card { width: min(420px, 100%); }
.auth-card .brand { justify-content: center; padding-bottom: 8px; }
.auth-card h1 { text-align: center; font-size: 1.4rem; }
.auth-card .lead { text-align: center; color: var(--muted); margin-bottom: 20px; }
.invite-code { font-family: var(--mono); font-size: 1.4rem; letter-spacing: .12em; color: var(--ink); }

.loading { padding: 40px 0; color: var(--muted); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

tr.sel td { background: var(--ink-soft); }
@media (max-width: 860px) {
  .grid-2 { grid-template-columns: 1fr !important; }
  .form-row { grid-template-columns: 1fr !important; }
  .test-edit { grid-template-columns: 1fr; }
  .page-head .row { width: 100%; }
}
.grid-2 > .sheet + .sheet { margin-top: 0; }
.test-head { display: grid; grid-template-columns: 1fr 1fr 92px; gap: 8px; margin-top: 8px; font-size: .8rem; color: var(--muted); }
@media (max-width: 860px) { .test-head { display: none; } }

/* ---------- бренд ---------- */
.brand { gap: 12px; }
.brand .logo { width: 34px; height: 34px; flex: none; color: var(--ink); }
.brand .logo .accent { stroke: var(--pen); }
.brand b { font-size: 1.35rem; font-weight: 600; letter-spacing: -0.02em; }
.brand small { display: block; font-size: .72rem; color: var(--muted); font-weight: 400; line-height: 1.2; letter-spacing: 0; }
.auth-hero { text-align: center; margin-bottom: 18px; }
.auth-hero .logo { width: 64px; height: 64px; color: var(--ink); }
.auth-hero .logo .accent { stroke: var(--pen); }
.auth-hero .word { font-size: 2.6rem; font-weight: 600; letter-spacing: -0.04em; line-height: 1; margin: 8px 0 6px; }
.auth-hero .tagline { color: var(--muted); }

/* ---------- выбор темы ---------- */
.themes { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 10px; }
.theme-card {
  border: 2px solid var(--line); border-radius: 8px; padding: 0; overflow: hidden; cursor: pointer;
  background: var(--surface); color: var(--text); font: inherit; text-align: left;
}
.theme-card[aria-pressed="true"] { border-color: var(--ink); }
.theme-card .sw { height: 64px; position: relative; }
.theme-card .sw i { position: absolute; left: 12px; bottom: 10px; width: 44px; height: 8px; border-radius: 4px; }
.theme-card .sw b { position: absolute; right: 12px; top: 10px; font: 600 1.3rem var(--hand); }
.theme-card span { display: block; padding: 7px 10px; font-size: .9rem; font-weight: 500; }

/* ---------- банк заданий ---------- */
.bank-sections { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
.bank-sec {
  display: block; text-decoration: none; color: var(--text); background: var(--surface);
  border: 1px solid var(--line); border-radius: 8px; padding: 14px 16px; position: relative; overflow: hidden;
}
.bank-sec:hover { border-color: var(--ink); }
.bank-sec .big { font-size: 2.4rem; font-weight: 600; letter-spacing: -0.04em; line-height: 1; color: var(--ink); }
.bank-sec .t { font-weight: 600; margin-top: 8px; }
.bank-sec .m { color: var(--muted); font-size: .85rem; }
.bank-sec[aria-current="true"] { border-color: var(--ink); box-shadow: inset 0 -3px 0 var(--ink); }
.topic-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.topic-list a {
  display: flex; align-items: center; gap: 12px; padding: 9px 10px; border-radius: var(--radius);
  text-decoration: none; color: var(--text);
}
.topic-list a:hover { background: var(--surface-2); }
.topic-list .cnt { margin-left: auto; color: var(--muted); font-size: .85rem; white-space: nowrap; }
.topic-list .bar { width: 70px; flex: none; }
.diff { display: inline-flex; gap: 2px; vertical-align: middle; }
.diff i { width: 6px; height: 12px; border-radius: 2px; background: var(--line); }
.diff i.on { background: var(--pen); }
.hint-box {
  margin-top: 10px; padding: 8px 12px; border-left: 3px solid var(--warn); background: var(--warn-soft); border-radius: 0 var(--radius) var(--radius) 0;
}
.hint-box b { color: var(--warn); font-weight: 600; margin-right: 4px; }
.solution-box { margin-top: 12px; padding: 12px 14px; border: 1px dashed var(--ok); border-radius: var(--radius); background: var(--ok-soft); }
.solution-box > b { display: block; color: var(--ok); margin-bottom: 4px; }
.bank-task .pick { position: absolute; top: 18px; right: 18px; }
.bank-task .task-head { padding-right: 40px; }
.select-bar {
  position: sticky; bottom: 12px; z-index: 10; display: flex; gap: 10px; align-items: center; flex-wrap: wrap;
  background: var(--text); color: var(--paper); border-radius: 8px; padding: 10px 14px; margin-top: 16px;
}
.select-bar .btn { border-color: transparent; }
svg.task-fig { display: inline-block; max-width: 100%; height: auto; margin: 6px 8px 6px 0; color: var(--text); vertical-align: top; }
.prose svg.task-fig { --fig-accent: var(--fig-accent); }
.filters { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.filters select, .filters input { width: auto; min-width: 140px; }

/* ---------- доски ---------- */
.board-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; }
.board-card {
  display: flex; flex-direction: column; text-decoration: none; color: var(--text);
  background: var(--surface); border: 1px solid var(--line); border-radius: 8px; overflow: hidden;
}
.board-card:hover { border-color: var(--ink); }
.board-card .thumb {
  height: 110px; background-color: #fff;
  background-image: linear-gradient(#e9edf3 1px, transparent 1px), linear-gradient(90deg, #e9edf3 1px, transparent 1px);
  background-size: 14px 14px; position: relative;
}
.board-card .thumb svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.board-card .body { padding: 10px 12px; }
.board-card .body b { display: block; }
.board-card .body span { color: var(--muted); font-size: .85rem; }

.topbar .icon-btn { width: 44px; height: 44px; color: var(--text); }
.topbar .icon-btn svg { width: 24px; height: 24px; flex: none; }
.topbar .brand .logo { width: 28px; height: 28px; }

.tag.en { background: #fdecef; color: #b4234a; }
.tag.ph { background: #ecf0ff; color: #3b4fc4; }
.tag.ru { background: #fff2e0; color: #a35a00; }
.tag.ot { background: var(--surface-2); color: var(--muted); }
[data-dark] .tag.en { background: #3a2028; color: #ff9ab4; }
[data-dark] .tag.ph { background: #23284a; color: #a8b6ff; }
[data-dark] .tag.ru { background: #3a2c18; color: #ffc073; }

/* =================== публичный сайт =================== */
.pub { min-height: 100vh; display: flex; flex-direction: column; }
.pub-head {
  position: sticky; top: 0; z-index: 30; display: flex; align-items: center; gap: 20px;
  padding: 12px max(16px, calc((100vw - 1120px) / 2)); background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--line);
}
.pub-head .brand { padding: 0; }
.pub-nav { display: flex; gap: 22px; margin-left: auto; }
.pub-nav a { color: var(--text); text-decoration: none; font-weight: 500; }
.pub-nav a:hover { color: var(--ink); }
.pub-main { flex: 1; width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 16px 60px; }
.pub-section { margin-top: 64px; }
.pub-section > h2 { font-size: 1.7rem; letter-spacing: -0.02em; margin-bottom: 20px; }
.pub-section > h1 { font-size: clamp(2rem, 4vw, 2.8rem); letter-spacing: -0.03em; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 60ch; }
.btn.big { min-height: 50px; padding: 0 24px; font-size: 1.05rem; border-radius: 10px; }
.btn.tg { background: #2aa3dd; border-color: #2aa3dd; color: #fff; --tg-cut: #2aa3dd; }
.btn.tg:hover { background: #1f8fc6; }
.btn.tg svg { flex: none; }

.hero { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: center; margin-top: 48px; }
.hero h1 { font-size: clamp(2.2rem, 4.6vw, 3.4rem); line-height: 1.08; letter-spacing: -0.035em; margin-bottom: 18px; }
.hero .lead { margin-bottom: 26px; }
.hero-art { width: 100%; height: auto; --grid-strong: var(--grid); }
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; margin-top: 24px; }
  .hero-art { max-width: 420px; margin: 0 auto; }
  .pub-head { flex-wrap: wrap; row-gap: 8px; }
  .pub-nav { order: 3; width: 100%; margin-left: 0; gap: 18px; overflow-x: auto; padding-bottom: 4px; white-space: nowrap; font-size: .95rem; }
  .pub-head .btn { margin-left: auto; }
}

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.feature { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
.feature-ico { width: 44px; height: 44px; border-radius: 10px; display: grid; place-items: center; background: var(--ink-soft); color: var(--ink); margin-bottom: 12px; }
.feature h3 { margin-bottom: 6px; }
.feature p { color: var(--muted); margin: 0; }

.tests-cta { display: grid; gap: 20px; padding: 32px; border-radius: 16px; background: var(--ink); color: var(--on-ink); }
.tests-cta h2 { color: inherit; font-size: 1.8rem; margin-bottom: 8px; }
.tests-cta p { opacity: .85; max-width: 60ch; margin: 0; }
.tests-cta .test-card { color: var(--text); }
.test-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.test-card {
  display: flex; flex-direction: column; gap: 6px; padding: 18px; border-radius: 12px; text-decoration: none; color: var(--text);
  background: var(--surface); border: 1px solid var(--line); border-top: 4px solid var(--ink); transition: transform .15s ease, box-shadow .15s ease;
}
.test-card:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(20, 30, 60, .12); }
.test-card.cs { border-top-color: var(--ok); }
.test-card h3 { margin: 4px 0 0; }
.test-card p { color: var(--muted); font-size: .92rem; margin: 0; flex: 1; }
.test-card-top { display: flex; justify-content: space-between; align-items: center; color: var(--ink); font-weight: 600; font-size: .85rem; }
.test-card.cs .test-card-top { color: var(--ok); }
.test-meta { font-size: .85rem; color: var(--muted); font-weight: 500; }

.teachers { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.teacher-card { display: flex; gap: 16px; align-items: flex-start; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
.teacher-card h3 { margin-bottom: 6px; }
.teacher-card .tags { margin-bottom: 8px; gap: 6px; }
.avatar {
  width: 40px; height: 40px; flex: none; border-radius: 50%; display: grid; place-items: center;
  background: var(--ink-soft); color: var(--ink); font-weight: 600; font-size: .9rem;
}
.avatar.big { width: 64px; height: 64px; font-size: 1.3rem; background: var(--ink); color: var(--on-ink); }

.subjects { display: flex; flex-wrap: wrap; gap: 12px; }
.subject-chip { display: inline-flex; align-items: center; gap: 10px; padding: 12px 18px; border-radius: 12px; background: var(--surface); border: 1px solid var(--line); font-weight: 600; color: var(--ink); }
.subject-chip.cs { color: var(--ok); }
.subject-chip.en { color: #c0274f; }
.final-cta { text-align: center; padding: 40px 20px; border: 2px dashed var(--line); border-radius: 16px; }
.final-cta p { color: var(--muted); }
.pub-foot {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding: 24px max(16px, calc((100vw - 1120px) / 2));
  border-top: 1px solid var(--line); background: var(--surface); font-size: .9rem;
}
.pub-foot .row { gap: 18px; }
.tg-fab {
  position: fixed; right: 18px; bottom: 18px; z-index: 40; display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 18px; border-radius: 999px; background: #2aa3dd; color: #fff; text-decoration: none; font-weight: 600;
  box-shadow: 0 8px 24px rgba(42, 163, 221, .45); --tg-cut: #2aa3dd;
}
.tg-fab:hover { background: #1f8fc6; }
@media (max-width: 560px) { .tg-fab span { display: none; } .tg-fab { padding: 14px; } }

/* тест */
.test-run { max-width: 760px; }
.quiz-head { margin-bottom: 14px; }
.quiz-head h1 { font-size: 1.6rem; margin-top: 6px; }
.test-run .bar { margin-bottom: 12px; height: 8px; }
.test-dots { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.test-dots .dot {
  width: 32px; height: 32px; border-radius: 8px; border: 1px solid var(--line); background: var(--surface);
  font: 500 .85rem var(--font); color: var(--muted); cursor: pointer;
}
.test-dots .dot.done { background: var(--ink-soft); color: var(--ink); border-color: transparent; }
.test-dots .dot.cur { outline: 2px solid var(--ink); color: var(--ink); }
.test-run .task { margin-bottom: 14px; }
.result-card { display: flex; gap: 28px; align-items: center; border-left: 6px solid var(--ok); margin-bottom: 16px; }
.result-card.warn { border-left-color: var(--warn); }
.result-card.bad { border-left-color: var(--pen); }
.result-score { display: grid; justify-items: center; gap: 2px; min-width: 110px; }
.result-score .mark.big { font-size: 3.4rem; }
.result-card h2 { margin-bottom: 4px; }
@media (max-width: 560px) { .result-card { flex-direction: column; align-items: flex-start; } }
.review-item { padding: 0; }
.review-item summary { display: flex; align-items: center; gap: 10px; padding: 14px 18px; cursor: pointer; list-style: none; }
.review-item summary::-webkit-details-marker { display: none; }
.review-item .review-body { padding: 0 18px 16px; }
.review-item.ok .task-num { background: var(--ok); border-color: var(--ok); color: #fff; }
.review-item.bad .task-num { border-color: var(--pen); color: var(--pen); }
.review-item + .review-item { margin-top: 8px; }
.lead-form h2 { margin-bottom: 4px; }
.done-box { text-align: center; border-color: var(--ok); }
.prose-page { max-width: 760px; }

/* =================== кабинеты =================== */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
.stat { display: grid; gap: 2px; padding: 16px; border-radius: 10px; background: var(--surface); border: 1px solid var(--line); text-decoration: none; color: var(--text); }
a.stat:hover { border-color: var(--ink); }
.stat b { font-size: 2rem; letter-spacing: -0.03em; color: var(--ink); line-height: 1.1; }
.stat span { color: var(--muted); font-size: .85rem; }
.school-banner {
  display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; padding: 12px 18px;
  border-radius: 10px; background: var(--ink-soft); color: var(--ink); text-decoration: none;
}
.perm-list { gap: 2px; }
.perm-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 4px 0; }
.perm-row select { min-height: 32px; padding: 4px 8px; font-size: .9rem; }
.topic-map { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.topic-map a { display: flex; align-items: center; gap: 10px; padding: 8px 6px; border-radius: 6px; text-decoration: none; color: var(--text); }
.topic-map a:hover { background: var(--surface-2); }
.dot-lv { width: 10px; height: 10px; border-radius: 50%; flex: none; background: var(--ok); }
.dot-lv.warn { background: var(--warn); }
.dot-lv.bad { background: var(--pen); }
.side-tg { display: inline-flex; align-items: center; gap: 6px; margin-top: 8px; color: #2aa3dd; text-decoration: none; font-weight: 500; font-size: .9rem; --tg-cut: var(--surface); }

/* ================= Волна 2: отделы, иллюстрации, новые блоки ================= */
.art { display: block; width: 100%; height: auto; overflow: visible; }
.eyebrow { display: inline-block; font-size: .78rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--pen); margin-bottom: 10px; }
.hero-text .eyebrow { display: block; }
.marker { background: linear-gradient(transparent 58%, color-mix(in srgb, #FFD34D 70%, transparent) 58%, color-mix(in srgb, #FFD34D 70%, transparent) 92%, transparent 92%); padding: 0 .08em; }
[data-theme="chalk"] .marker, [data-theme="night"] .marker { background: linear-gradient(transparent 60%, color-mix(in srgb, var(--pen) 45%, transparent) 60%, color-mix(in srgb, var(--pen) 45%, transparent) 92%, transparent 92%); }
.hero-facts { list-style: none; padding: 0; margin: 28px 0 0; display: flex; gap: 28px; flex-wrap: wrap; }
.hero-facts li { display: flex; flex-direction: column; color: var(--muted); font-size: .9rem; }
.hero-facts b { font-size: 1.6rem; color: var(--text); letter-spacing: -.02em; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.section-head h2 { margin: 0; font-size: 1.7rem; letter-spacing: -.02em; }
.section-head p { margin: 0; }

/* анимации иллюстраций */
.art .draw { stroke-dasharray: 900; stroke-dashoffset: 900; animation: art-draw 2.2s .3s ease-out forwards; }
.art .float-a { animation: art-float 6s ease-in-out infinite; }
.art .float-b { animation: art-float 7s 1s ease-in-out infinite reverse; }
.art .chip { animation: art-float 5s .5s ease-in-out infinite; transform-box: fill-box; }
.art .cursor-a { animation: cur-a 7s ease-in-out infinite; }
.art .cursor-b { animation: cur-b 9s ease-in-out infinite; }
@keyframes art-draw { to { stroke-dashoffset: 0; } }
@keyframes art-float { 50% { translate: 0 -6px; } }
@keyframes cur-a { 0%, 100% { translate: 0 0; } 40% { translate: -60px 6px; } 70% { translate: 30px -8px; } }
@keyframes cur-b { 0%, 100% { translate: 0 0; } 50% { translate: 20px 60px; } }
@media (prefers-reduced-motion: reduce) {
  .art .draw { animation: none; stroke-dashoffset: 0; }
  .art .float-a, .art .float-b, .art .chip, .art .cursor-a, .art .cursor-b { animation: none; }
}

/* отделы */
.depts { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 20px; }
.dept-card { display: grid; grid-template-rows: auto 1fr; border-radius: 20px; overflow: hidden; text-decoration: none; color: var(--text);
  background: var(--surface); border: 1px solid var(--line); transition: transform .2s, box-shadow .2s; }
.dept-card:hover { transform: translateY(-4px); box-shadow: 0 18px 40px rgba(20, 30, 60, .14); }
.dept-art { padding: 22px 26px 6px; background: var(--ink-soft); }
.dept-english .dept-art { background: var(--pen-soft); }
.dept-art .art { max-height: 230px; }
.dept-body { padding: 20px 24px 22px; display: flex; flex-direction: column; }
.dept-body h3 { font-size: 1.4rem; letter-spacing: -.02em; margin: 0 0 6px; }
.dept-body p { color: var(--muted); margin: 0 0 16px; flex: 1; }
.dept-meta { display: flex; gap: 14px; flex-wrap: wrap; font-size: .88rem; color: var(--muted); align-items: center; }
.dept-meta .go { margin-left: auto; color: var(--ink); font-weight: 600; }
.dept-english .dept-meta .go { color: var(--pen); }
.dept-hero .hero-text > a.small { display: inline-block; margin-bottom: 14px; }
.dept-hero-art { background: var(--ink-soft); border-radius: 28px; padding: 26px; }
.dept-hero.dept-english .dept-hero-art { background: var(--pen-soft); }
.programs { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; }
.program { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px; position: relative; }
.program-n { font-family: var(--hand); font-size: 2rem; color: var(--pen); line-height: 1; display: block; margin-bottom: 6px; }
.program h3 { margin: 0 0 6px; font-size: 1.08rem; }
.program p { margin: 0; font-size: .93rem; }

/* как проходит занятие */
.how { display: grid; grid-template-columns: 1fr 1.05fr; gap: 36px; align-items: center; }
.how .features { grid-template-columns: 1fr 1fr; margin-top: 20px; }
.how .feature { padding: 16px; }
.how-art { background: var(--surface-2); border-radius: 24px; padding: 22px; }
@media (max-width: 860px) { .how { grid-template-columns: 1fr; } .how .features { grid-template-columns: 1fr; } }

/* шаги */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; counter-reset: s; position: relative; }
.steps::before { content: ''; position: absolute; top: 46px; left: 12%; right: 12%; border-top: 2px dashed var(--line); z-index: 0; }
.step { position: relative; z-index: 1; text-align: center; padding: 0 8px; }
.step-pic { width: 92px; height: 92px; margin: 0 auto 14px; border-radius: 50%; background: var(--surface); border: 2px solid var(--line); display: grid; place-items: center; position: relative; }
.step-pic .art { width: 60px; }
.step-n { position: absolute; top: -6px; right: -6px; width: 30px; height: 30px; border-radius: 50%; background: var(--pen); color: #fff; font-weight: 700; display: grid; place-items: center; font-size: .95rem; }
.step h3 { margin: 0 0 6px; }
.step p { margin: 0 auto; max-width: 30ch; }
@media (max-width: 760px) { .steps { grid-template-columns: 1fr; } .steps::before { display: none; } }

/* частые вопросы */
.faq { max-width: 820px; }
.faq-item { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 0 20px; margin-bottom: 10px; }
.faq-item summary { cursor: pointer; padding: 16px 0; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; font-size: 1.4rem; line-height: 1; color: var(--ink); transition: transform .2s; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { margin: 0 0 16px; color: var(--muted); }

/* варианты ответа в тесте */
.choices { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 10px; margin: 14px 0 6px; }
.choice { display: flex; align-items: center; gap: 12px; text-align: left; padding: 12px 14px; border-radius: 12px; border: 2px solid var(--line);
  background: var(--surface); color: var(--text); font: inherit; cursor: pointer; transition: border-color .15s, background .15s; }
.choice:hover { border-color: var(--ink); }
.choice[aria-checked="true"] { border-color: var(--ink); background: var(--ink-soft); }
.choice-key { flex: none; width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center; font-weight: 700; background: var(--surface-2); color: var(--ink); }
.choice[aria-checked="true"] .choice-key { background: var(--ink); color: var(--on-ink); }
.choice-row { justify-content: flex-end; }
.test-card.en { border-top-color: var(--pen); }
.test-card.en .test-card-top { color: var(--pen); }

/* рисунки в задачах: графы */
.graph-fig { max-width: 100%; }

/* вход */
.auth.with-art { grid-template-columns: minmax(0, 420px) minmax(0, 380px); gap: 56px; justify-content: center; }
.auth-side { text-align: center; }
.auth-side .art { max-width: 340px; margin: 0 auto 16px; }
.auth-side h2 { font-size: 1.5rem; letter-spacing: -.02em; margin-bottom: 8px; }
.auth-side p { color: var(--muted); max-width: 34ch; margin: 0 auto; }
@media (max-width: 860px) { .auth.with-art { grid-template-columns: 1fr; } .auth-side { display: none; } }
.field .hint { display: block; margin-top: 4px; }

/* приглашение ученика */
.invite-sheet { display: flex; gap: 24px; align-items: center; }
.invite-art { flex: none; width: 120px; }
.invite-big { display: flex; align-items: baseline; gap: 12px; margin: 6px 0 14px; }
.invite-big .invite-code { font-size: 2.2rem; font-weight: 700; letter-spacing: .12em; color: var(--ink); font-family: var(--mono); }
@media (max-width: 640px) { .invite-art { display: none; } }

/* кабинет: приветствие и пустые состояния */
.greet { display: flex; align-items: center; gap: 20px; background: linear-gradient(120deg, var(--ink-soft), var(--surface) 70%); border: 1px solid var(--line);
  border-radius: 18px; padding: 20px 24px; }
.greet .greet-art { width: 130px; flex: none; }
.greet h1 { margin: 0 0 4px; }
.greet p { margin: 0; color: var(--muted); }
@media (max-width: 640px) { .greet .greet-art { display: none; } }
.empty-art { width: 140px; margin: 0 auto 10px; }
.empty.with-art { text-align: center; }

/* отделы в разделе «Школа» */
.dept-group + .dept-group { margin-top: 22px; }
.dept-group h3 { display: flex; align-items: center; gap: 10px; }
.dept-group h3 .count { font-weight: 500; color: var(--muted); font-size: .9rem; }
.backup-list { list-style: none; padding: 0; margin: 10px 0 0; font-family: var(--mono); font-size: .88rem; }
.backup-list li { padding: 6px 0; border-bottom: 1px dashed var(--line); display: flex; justify-content: space-between; gap: 12px; }