:root {
  --paper: #FAF7F0; --paper-2: #F1ECE1; --card: #FFFDF8; --ink: #1E2A47; --ink-2: #46506A; --muted: #5F6678;
  --line: #E3DDD0; --accent: #B5520F; --accent-2: #F2A65A; --blue: #2F6FD1; --blue-soft: #EAF0FA;
  --ok: #1F7A4D; --ok-soft: #E3F4EA; --bad: #B3261E; --bad-soft: #FBE7E4; --warn: #8A5A00; --warn-soft: #FFF3D6;
  --code-bg: #1E2A47; --code-ink: #EAEFF7; --radius: 14px;
  --font: "Nunito", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  --font-head: "Rubik", var(--font); --mono: "JetBrains Mono", Consolas, "Courier New", monospace;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; }
body { background: var(--paper); color: var(--ink); font-family: var(--font); font-size: 17px; line-height: 1.5; }
a { color: var(--blue); }
h1, h2, h3 { font-family: var(--font-head); line-height: 1.2; margin: 0 0 .5em; }
h1 { font-size: 30px; } h2 { font-size: 23px; } h3 { font-size: 18px; }
code, pre { font-family: var(--mono); font-size: 14.5px; }
pre { background: var(--paper-2); padding: 10px 12px; border-radius: 10px; overflow: auto; margin: 0; white-space: pre-wrap; }
.muted { color: var(--muted); }
.wrap { max-width: 1180px; margin: 0 auto; padding: 24px 20px 60px; }
.wrap.wide { max-width: none; padding: 16px 20px 40px; }

/* шапка */
.top { display: flex; align-items: center; gap: 18px; padding: 10px 20px; background: var(--ink); color: var(--paper); }
.top a { color: var(--paper); text-decoration: none; }
.brand { font-family: var(--font-head); font-weight: 700; font-size: 20px; display: flex; align-items: center; gap: 10px; }
.brand-mark { width: 28px; height: 28px; border-radius: 8px; background: var(--accent-2); color: var(--ink); display: grid; place-items: center; font-family: var(--mono); font-size: 15px; font-weight: 700; }
.top nav { display: flex; gap: 16px; margin-left: auto; align-items: center; flex-wrap: wrap; }
.top nav a { opacity: .85; } .top nav a:hover { opacity: 1; }
.who { opacity: .7; font-size: 15px; }
.live-banner { background: var(--accent-2); color: var(--ink); padding: 8px 20px; display: flex; gap: 14px; align-items: center; font-weight: 700; }
.messages { list-style: none; padding: 0; margin: 0 0 16px; }
.messages li { background: var(--blue-soft); border-radius: 10px; padding: 10px 14px; margin-bottom: 6px; }
.messages li.success { background: var(--ok-soft); }

/* кнопки */
.btn { display: inline-flex; align-items: center; gap: 6px; border: 0; border-radius: 10px; padding: 10px 16px; background: var(--accent); color: #fff; font: 700 16px var(--font); cursor: pointer; text-decoration: none; white-space: nowrap; }
.btn:hover { filter: brightness(1.06); }
.btn:disabled { opacity: .6; cursor: default; }
.btn-blue { background: var(--blue); } .btn-dark { background: var(--ink); } .btn-ok { background: var(--ok); }
.btn-ghost { background: transparent; color: var(--ink); box-shadow: inset 0 0 0 2px var(--line); }
.btn-small { padding: 6px 10px; font-size: 14px; border-radius: 8px; }
.btn-big { padding: 14px 22px; font-size: 19px; }
.pulse { animation: pulse 1.4s ease-in-out infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 6px rgba(242,166,90,.45); } }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; }
.grid { display: grid; gap: 16px; }
.tag { display: inline-block; font-size: 12.5px; font-weight: 700; padding: 2px 8px; border-radius: 999px; background: var(--paper-2); color: var(--ink-2); }
.d1 { background: #E3F4EA; color: #1F6B45; } .d2 { background: #FFF0D9; color: #8A5A00; } .d3 { background: #FBE7E4; color: #A0281F; }

/* вход */
.login { max-width: 420px; margin: 60px auto; }
.login input { width: 100%; font-size: 18px; padding: 12px; border: 2px solid var(--line); border-radius: 10px; margin: 6px 0 14px; font-family: var(--mono); }
.login label { font-weight: 700; }
.form-error { background: var(--bad-soft); color: var(--bad); padding: 10px 14px; border-radius: 10px; margin-bottom: 12px; }

/* главная ребёнка: лесенка */
.hero { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; margin-bottom: 26px; }
.hero h1 { margin: 0; }
.ladder { display: grid; gap: 10px; }
.step { display: grid; grid-template-columns: 54px 1fr auto; gap: 16px; align-items: center; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 18px; text-decoration: none; color: inherit; }
.step-num { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; font: 700 20px var(--font-head); background: var(--paper-2); }
.step.current { border: 2px solid var(--accent); box-shadow: 0 6px 18px rgba(197,90,18,.12); }
.step.current .step-num { background: var(--accent); color: #fff; }
.step.done .step-num { background: var(--ok); color: #fff; }
.step.later { opacity: .55; }
.step-words { color: var(--ink-2); font-size: 15px; }
.bar { height: 8px; width: 140px; background: var(--paper-2); border-radius: 99px; overflow: hidden; }
.bar > i { display: block; height: 100%; background: var(--ok); }

/* ступень */
.theory { font-size: 17.5px; }
.theory pre { background: var(--code-bg); color: var(--code-ink); }
.theory code { background: var(--paper-2); padding: 1px 5px; border-radius: 5px; }
.theory pre code { background: none; padding: 0; }
.task-list { display: grid; gap: 8px; }
.task-row { display: flex; gap: 12px; align-items: center; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 10px 14px; text-decoration: none; color: inherit; }
.task-row .st { margin-left: auto; font-size: 14px; }
.st.ok { color: var(--ok); font-weight: 700; } .st.try { color: var(--warn); }

/* страница задачи */
.task-layout { display: grid; grid-template-columns: minmax(320px, 40%) 1fr; gap: 16px; height: calc(100vh - 60px); padding: 12px 16px; }
body.has-live .task-layout { height: calc(100vh - 100px); }
.task-left { overflow: auto; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; }
.task-left h1 { font-size: 25px; }
.task-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 10px; align-items: center; }
.statement h3 { margin-top: 14px; }
.sample { border: 1px solid var(--line); border-radius: 12px; padding: 10px; margin: 10px 0; }
.sample-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.lbl { font-size: 12.5px; font-weight: 700; text-transform: uppercase; letter-spacing: .5px; color: var(--muted); margin-bottom: 3px; }
.explain { color: var(--ink-2); font-size: 15px; margin: 8px 0 0; }
.hint-box { background: var(--warn-soft); border-radius: 10px; padding: 10px 14px; margin-top: 10px; }
.task-right { display: grid; grid-template-rows: auto minmax(200px, 1fr) minmax(220px, 42%); gap: 10px; min-height: 0; }
.toolbar { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.py-state { margin-left: auto; font-size: 13.5px; color: var(--muted); }
.py-state.ready { color: var(--ok); } .py-state.fatal { color: var(--bad); }
.editor-box { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: #fff; min-height: 0; }
.editor-box .CodeMirror { height: 100%; font-family: var(--mono); font-size: 16px; line-height: 1.55; }
.CodeMirror-gutters { background: #F7F4EC; border-right: 1px solid var(--line); }
.breakpoints { width: 18px; cursor: pointer; }
.CodeMirror-linenumber { cursor: pointer; }
.bp { color: #D93025; font-size: 14px; line-height: 1.6; padding-left: 3px; }
.cm-dbg-line { background: #FFF1B8 !important; }
.cm-error-line { background: #FDE2DF !important; }
.CodeMirror-activeline-background { background: #F6F8FD; }
.CodeMirror-hints { font-family: var(--mono); font-size: 14px; border-radius: 10px; padding: 4px; z-index: 50; }
.CodeMirror-hint { padding: 4px 8px; border-radius: 6px; display: flex; gap: 14px; justify-content: space-between; }
li.CodeMirror-hint-active { background: var(--blue); }
.hint-note { font-family: var(--font); color: var(--muted); font-size: 13px; }
li.CodeMirror-hint-active .hint-note { color: #DCE6FA; }

.panel { border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); display: flex; flex-direction: column; min-height: 0; }
.panel-tabs { display: flex; gap: 2px; padding: 6px 6px 0; border-bottom: 1px solid var(--line); }
.panel-tab { border: 0; background: none; padding: 8px 14px; font: 700 15px var(--font); color: var(--ink-2); border-radius: 8px 8px 0 0; cursor: pointer; }
.panel-tab.active { background: var(--paper); color: var(--ink); box-shadow: inset 0 -3px 0 var(--accent); }
.panel-body { padding: 10px 12px; overflow: auto; flex: 1; }
.io-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; height: 100%; }
.io-grid textarea { width: 100%; height: calc(100% - 22px); min-height: 90px; font: 15px var(--mono); border: 1px solid var(--line); border-radius: 10px; padding: 8px; resize: none; background: #fff; }
.io-grid pre { height: calc(100% - 22px); min-height: 90px; background: var(--paper-2); }
.err { background: var(--bad-soft); border-radius: 10px; padding: 8px 12px; margin-top: 8px; color: #6A1610; }
.err p { margin: 4px 0; color: var(--ink); }
.err summary { cursor: pointer; font-size: 13.5px; color: var(--muted); }
.err pre { background: #fff; margin-top: 4px; font-size: 13px; }
.warn { color: var(--warn); }
.ok-text { color: var(--ok); font-weight: 700; }

.test-card { border: 1px solid var(--line); border-radius: 12px; padding: 10px; margin-bottom: 10px; background: #fff; }
.test-head { display: flex; gap: 10px; align-items: center; margin-bottom: 8px; flex-wrap: wrap; }
.test-actions { margin-left: auto; display: flex; gap: 6px; }
.test-res.ok { color: var(--ok); font-weight: 700; } .test-res.bad { color: var(--bad); font-weight: 700; }
.test-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 8px; margin: 8px 0; }
.hidden-note { background: var(--paper-2); border-radius: 10px; padding: 10px 12px; }

.verdict { border-radius: 12px; padding: 12px 14px; }
.verdict.running { background: var(--blue-soft); }
.verdict.ok { background: var(--ok-soft); color: var(--ok); }
.verdict.bad { background: var(--bad-soft); }
.verdict.bad > b { color: var(--bad); }
.verdict-next { display: flex; gap: 12px; align-items: center; margin-top: 10px; flex-wrap: wrap; }
.verdict .stuck { color: var(--warn); font-weight: 700; }

.dbg-controls { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; margin-bottom: 8px; }
.dbg-controls input[type=range] { flex: 1; min-width: 120px; }
.dbg-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 10px; }
.dbg-grid table { width: 100%; border-collapse: collapse; font-size: 15px; }
.dbg-grid th, .dbg-grid td { text-align: left; padding: 4px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
.dbg-grid td code { white-space: pre-wrap; word-break: break-word; }
tr.changed td { background: #FFF1B8; } tr.new td { background: #E7F3FF; }
#dbg-stack { color: var(--ink-2); font-size: 14.5px; margin: 0 0 6px; }

.toast { position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 140%); background: var(--ink); color: var(--paper); padding: 12px 16px; border-radius: 12px; display: flex; gap: 14px; align-items: center; transition: transform .25s; z-index: 100; box-shadow: 0 10px 30px rgba(0,0,0,.2); }
.toast.show { transform: translate(-50%, 0); }

/* презентация */
.stage { position: relative; width: 100%; aspect-ratio: 16 / 9; background: #fff; border-radius: 12px; overflow: hidden; box-shadow: 0 10px 30px rgba(30,42,71,.12); }
.stage-inner { position: absolute; left: 0; top: 0; width: 1920px; height: 1080px; transform-origin: 0 0; }
.stage-inner > section { position: absolute; inset: 0; width: 1920px; height: 1080px; }
.stage-inner > section * { margin: 0; }
.stage-inner > section ul, .stage-inner > section ol { padding-left: 1.2em; }
.stage-inner > section table { border-collapse: collapse; width: 100%; }
.stage-inner > section th, .stage-inner > section td { padding: 10px 14px; border-bottom: 2px solid rgba(30,42,71,.12); }
.live-wrap { max-width: 1400px; margin: 0 auto; padding: 16px; }
.live-bar { display: flex; gap: 10px; align-items: center; margin-top: 12px; flex-wrap: wrap; }
.live-wait { text-align: center; padding: 80px 20px; }

/* учитель */
.teacher-head { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-bottom: 18px; }
.teacher-head h1 { margin: 0 auto 0 0; }
table.board { width: 100%; border-collapse: collapse; background: var(--card); border-radius: var(--radius); overflow: hidden; font-size: 15.5px; }
table.board th { text-align: left; background: var(--paper-2); font-size: 13px; text-transform: uppercase; letter-spacing: .4px; color: var(--ink-2); }
table.board th, table.board td { padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: middle; }
table.board tr.stuck td { background: var(--warn-soft); }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 6px; vertical-align: middle; background: #C4C8D2; }
.dot.on { background: var(--ok); } .dot.typing { background: var(--blue); box-shadow: 0 0 0 3px rgba(47,111,209,.25); } .dot.away { background: var(--accent-2); }
.v-OK { color: var(--ok); font-weight: 700; } .v-WA, .v-RE, .v-TL { color: var(--bad); font-weight: 700; }
.cells { display: flex; gap: 3px; flex-wrap: wrap; }
.cell { width: 14px; height: 14px; border-radius: 4px; background: #E8E4DA; display: inline-block; }
.cell.solved { background: var(--ok); } .cell.tried { background: var(--accent-2); } .cell.open { background: #C9D3E6; }
.cell-sep { width: 8px; }
.legend { display: flex; gap: 14px; font-size: 14px; color: var(--ink-2); margin: 8px 0; flex-wrap: wrap; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.login-card { background: #fff; border: 2px dashed #B9B3A5; border-radius: 12px; padding: 14px 16px; }
.login-card .nm { font-weight: 800; font-size: 18px; margin-bottom: 6px; }
.login-card .kv { font-family: var(--mono); font-size: 17px; }
.login-card .kv span { font-family: var(--font); color: var(--muted); font-size: 14px; margin-right: 6px; }
.copied { color: var(--ok) !important; }
textarea.names { width: 100%; min-height: 220px; font: 16px var(--font); padding: 10px; border-radius: 10px; border: 2px solid var(--line); }
.field { margin-bottom: 14px; } .field label { display: block; font-weight: 700; margin-bottom: 4px; }
.field input, .field select { font: 16px var(--font); padding: 8px 10px; border-radius: 10px; border: 2px solid var(--line); min-width: 260px; }
.live-teacher { display: grid; grid-template-columns: minmax(420px, 1.15fr) 1fr; gap: 16px; }
.notes { background: var(--warn-soft); border-radius: 12px; padding: 12px 16px; white-space: pre-wrap; font-size: 15.5px; max-height: 38vh; overflow: auto; }
.code-view .CodeMirror { height: 420px; font-family: var(--mono); font-size: 15px; border-radius: 12px; border: 1px solid var(--line); }

@media (max-width: 900px) {
  .task-layout { grid-template-columns: 1fr; height: auto; }
  .task-right { grid-template-rows: auto 380px auto; }
  .io-grid, .dbg-grid, .sample-grid, .live-teacher { grid-template-columns: 1fr; }
  .step { grid-template-columns: 44px 1fr; } .step .bar { display: none; }
}
@media print {
  .top, .no-print, .live-banner, .messages { display: none !important; }
  body { background: #fff; }
  .cards { grid-template-columns: 1fr 1fr; }
  .login-card { break-inside: avoid; }
}

/* короткий итог проверки в строке кнопок; подробности — на вкладке «Проверка» */
.verdict-pill { border: 0; border-radius: 999px; padding: 7px 14px; font: 700 14.5px var(--font); cursor: pointer; max-width: 360px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.verdict-pill.ok { background: var(--ok-soft); color: var(--ok); }
.verdict-pill.bad { background: var(--bad-soft); color: var(--bad); }
.verdict-pill.running { background: var(--blue-soft); color: var(--blue); }
.panel-tab.tab-bad { color: var(--bad); } .panel-tab.tab-ok { color: var(--ok); }
#hint-box { display: grid; gap: 8px; margin-top: 10px; }
#hint-box .hint-box { margin-top: 0; }
.verdict pre { max-height: 180px; }

/* ── удобство: по итогам разбора интерфейса ── */
/* видимый фокус для клавиатуры */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, .step:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; }
.btn kbd { font: 600 11.5px var(--mono); background: rgba(255,255,255,.18); border-radius: 5px; padding: 1px 5px; margin-left: 2px; }
/* вывод и ошибка в одной колонке: ошибку видно сразу под выводом */
.out-col { display: flex; flex-direction: column; min-height: 0; overflow: auto; }
.out-col pre { height: auto !important; min-height: 48px; flex: 0 0 auto; }
.out-col .err { margin-top: 8px; }
.err-where { font-weight: 800; color: var(--bad); }
.err-where code { background: #fff; padding: 1px 6px; border-radius: 5px; color: var(--ink); font-weight: 600; }
.err-ru { font-size: 16px; }
.err-raw { font-size: 13.5px; color: var(--ink-2); margin-top: 4px; }
.err-raw span { color: var(--muted); }
.err-raw code { background: #fff; padding: 1px 6px; border-radius: 5px; word-break: break-word; white-space: pre-wrap; }
/* подсказки во вкладке рядом с кодом */
.hint-box.new { box-shadow: inset 4px 0 0 var(--accent-2); }
.hint-wait { font-size: 14.5px; margin: 10px 0 0; }
#btn-hint:disabled { opacity: .75; }
.verdict .stuck p { margin: 8px 0 6px; }
/* ступень: код не прилипает к заголовкам */
.theory pre { margin: 8px 0 16px; }
.theory h3, .theory p + h3 { margin-top: 18px; }
@media (max-width: 900px) {
  .btn kbd { display: none; }
  .top { padding: 8px 12px; gap: 10px; }
  .brand { font-size: 18px; white-space: nowrap; }
  .top nav { gap: 10px; font-size: 15px; }
  .who { display: none; }
}
@media (max-width: 520px) {
  .brand-text { display: none; }
  .top nav { flex-wrap: nowrap; font-size: 14px; gap: 8px; }
  .top nav a { white-space: nowrap; }
}

/* олимпиадный режим */
.submit-group { display: inline-flex; align-items: stretch; }
.submit-group .judge-mode:not([hidden]) { margin-left: -4px; }
.submit-group:has(.judge-mode:not([hidden])) #btn-submit { border-radius: 10px 0 0 10px; }
.judge-mode { font: 700 14.5px var(--font); color: #fff; background: #93420B; border: 0; border-radius: 0 10px 10px 0; padding: 0 10px; cursor: pointer; max-width: 270px; }
.judge-mode option { color: var(--ink); background: #fff; }
.judge-head { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 8px; font-size: 14.5px; }
table.judge-table { border-collapse: collapse; margin: 10px 0 4px; font-size: 15px; background: #fff; border-radius: 10px; overflow: hidden; min-width: 340px; }
table.judge-table th, table.judge-table td { padding: 5px 12px; border-bottom: 1px solid var(--line); text-align: left; color: var(--ink); }
table.judge-table th { font-size: 12.5px; text-transform: uppercase; letter-spacing: .4px; color: var(--muted); background: var(--paper-2); }
table.judge-table tr.ok td:nth-child(2) { color: var(--ok); font-weight: 700; }
table.judge-table tr.bad td { background: var(--bad-soft); }
table.judge-table tr.bad td:nth-child(2) { color: var(--bad); }
.btn.loading { pointer-events: none; opacity: .8; }
.btn.loading::after { content: ""; width: 14px; height: 14px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── по UX-отчёту: состояния кнопок, крупные зоны нажатия, читаемый код ── */
.btn { transition: filter .1s, transform .05s; }
.btn:active:not(:disabled) { transform: translateY(1px) scale(.98); }
.btn-small { min-height: 34px; }
#btn-hint:disabled { background: var(--paper-2); box-shadow: inset 0 0 0 2px var(--line); color: var(--ink-2); }
@media (pointer: coarse) {
  .btn, .btn-small, .panel-tab, .judge-mode, .task-row, .top nav a { min-height: 44px; }
  .panel-tab { padding: 10px 14px; }
  .top nav a { display: inline-flex; align-items: center; }
}
/* в коде каждый символ как есть: «!=» не превращается в «≠» — детям нужно видеть, что печатать */
code, pre, .CodeMirror { font-variant-ligatures: none; font-feature-settings: "liga" 0, "calt" 0; }

/* перетаскиваемая граница между условием и редактором */
@media (min-width: 901px) {
  .task-layout { grid-template-columns: minmax(300px, var(--left, 40%)) 10px minmax(420px, 1fr); gap: 6px; }
  .splitter { cursor: col-resize; border-radius: 6px; position: relative; }
  .splitter::after { content: ""; position: absolute; left: 3px; top: 50%; width: 4px; height: 48px; margin-top: -24px; border-radius: 4px; background: var(--line); }
  .splitter:hover::after, .splitter.drag::after { background: var(--accent-2); }
  body.resizing { cursor: col-resize; user-select: none; }
}
@media (max-width: 900px) { .splitter { display: none; } }

/* тёмный редактор */
.editor-box { position: relative; }
.theme-toggle { position: absolute; right: 8px; top: 6px; z-index: 5; font: 700 13px var(--font); border: 0; border-radius: 8px; padding: 5px 10px; background: rgba(30,42,71,.06); color: var(--ink-2); cursor: pointer; }
.theme-toggle:hover { background: rgba(30,42,71,.12); }
.editor-box.dark { background: #1B2130; border-color: #2B3346; }
.editor-box.dark .theme-toggle { background: rgba(255,255,255,.08); color: #C9D1E3; }
.editor-box.dark .CodeMirror { background: #1B2130; color: #E6E9F0; }
.editor-box.dark .CodeMirror-gutters { background: #161B27; border-right-color: #2B3346; }
.editor-box.dark .CodeMirror-linenumber { color: #6F7A93; }
.editor-box.dark .CodeMirror-cursor { border-left-color: #F2F4F8; }
.editor-box.dark .CodeMirror-activeline-background { background: #232B3D; }
.editor-box.dark .CodeMirror-selected, .editor-box.dark .CodeMirror-focused .CodeMirror-selected { background: #34405C; }
.editor-box.dark .cm-keyword { color: #FF9F6E; } .editor-box.dark .cm-builtin { color: #7CC4FF; }
.editor-box.dark .cm-def { color: #7CC4FF; } .editor-box.dark .cm-string { color: #A9DC8E; }
.editor-box.dark .cm-number { color: #F4C66E; } .editor-box.dark .cm-comment { color: #8B95AC; font-style: italic; }
.editor-box.dark .cm-variable, .editor-box.dark .cm-variable-2, .editor-box.dark .cm-property { color: #E6E9F0; }
.editor-box.dark .cm-operator { color: #D7DCE8; } .editor-box.dark .cm-atom { color: #E89BE0; }
.editor-box.dark .CodeMirror-matchingbracket { color: #fff !important; background: #3D4A66; }
.editor-box.dark .cm-dbg-line { background: #5A4A12 !important; }
.editor-box.dark .cm-error-line { background: #5C2323 !important; }
.editor-box.dark .bp { color: #FF6B5E; }
@media (max-width: 900px) {
  .task-layout { grid-template-columns: minmax(0, 1fr); }
  .task-right { grid-template-columns: minmax(0, 1fr); }
  .submit-group { flex-wrap: wrap; width: 100%; }
  .submit-group #btn-submit { flex: 1 1 auto; justify-content: center; }
  .judge-mode { max-width: none; min-width: 0; flex: 1 1 140px; }
  table.judge-table { min-width: 0; width: 100%; }
}
.panel-tabs { overflow-x: auto; scrollbar-width: none; }
.panel-tab { white-space: nowrap; flex: 0 0 auto; }
.panel { min-width: 0; }

/* Курсы и модули */
.course { margin: 18px 0 26px; }
.course > summary { list-style: none; cursor: pointer; display: flex; align-items: center; gap: 12px; }
.course > summary::-webkit-details-marker { display: none; }
.course > summary h2 { margin: 0; }
.course > summary::before { content: "▸"; color: var(--muted); font-size: 18px; transition: transform .15s; }
.course[open] > summary::before { transform: rotate(90deg); }
.course-desc { margin: 6px 0 14px; }
.modules { display: grid; gap: 16px; }
.module { border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px 16px; background: var(--paper); }
.module-current { border-color: var(--accent); }
.module-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.module-head h3 { margin: 0; font-size: 18px; }
.module-count { margin-left: auto; font-size: 14px; }
.module-desc { margin: 4px 0 12px; font-size: 15px; }
.module-soon { background: transparent; border-style: dashed; color: var(--muted); filter: grayscale(1); }
.module-soon h3 { color: var(--muted); }
.module-soon .module-desc { margin-bottom: 0; }
.soon-tag { background: var(--paper-2); color: var(--muted); }
.tag.exam { background: var(--blue-soft); color: var(--blue); font-weight: 600; }
.source-line a { color: inherit; }

/* скрыть / показать условие */
.left-rail { display: none; }
.collapse-left { float: right; margin: -6px -8px 0 8px; border: 0; background: transparent; color: var(--muted); font: 700 20px var(--font); width: 34px; height: 34px; border-radius: 8px; cursor: pointer; }
.collapse-left:hover { background: var(--paper-2); color: var(--ink); }
.task-layout.left-collapsed .task-left, .task-layout.left-collapsed .splitter { display: none; }
.task-layout.left-collapsed .left-rail { display: flex; align-items: center; justify-content: center; border: 1px solid var(--line); background: var(--card); border-radius: var(--radius); cursor: pointer; color: var(--ink-2); font: 700 14px var(--font); padding: 0; }
.task-layout.left-collapsed .left-rail span { writing-mode: vertical-rl; transform: rotate(180deg); letter-spacing: .5px; }
.task-layout.left-collapsed .left-rail:hover { color: var(--accent); border-color: var(--accent-2); }
@media (min-width: 901px) { .task-layout.left-collapsed { grid-template-columns: 40px minmax(420px, 1fr); } }
@media (max-width: 900px) {
  .task-layout.left-collapsed .left-rail { min-height: 44px; }
  .task-layout.left-collapsed .left-rail span { writing-mode: horizontal-tb; transform: none; }
}

/* отзыв о задаче — тихо, внизу условия */
.feedback { margin-top: 18px; padding-top: 12px; border-top: 1px dashed var(--line); display: flex; flex-wrap: wrap; align-items: center; gap: 6px; font-size: 14px; color: var(--muted); }
.fb-q { margin-right: 4px; }
.fb-btn, .fb-chip { border: 1px solid var(--line); background: transparent; border-radius: 999px; cursor: pointer; font: 600 13px var(--font); color: var(--ink-2); min-height: 32px; padding: 2px 10px; }
.fb-btn { font-size: 15px; filter: grayscale(1); opacity: .7; }
.fb-btn.on { filter: none; opacity: 1; border-color: var(--accent-2); background: var(--paper-2); }
.fb-chip.on { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.fb-sep { width: 8px; }
.fb-more { flex-basis: 100%; }
.fb-more summary { cursor: pointer; }
.fb-more textarea { width: 100%; min-height: 70px; margin: 8px 0 6px; font: 15px var(--font); padding: 8px 10px; border: 1px solid var(--line); border-radius: 10px; background: var(--paper); color: var(--ink); }
.fb-appear { animation: fbIn .5s ease-out; }
@keyframes fbIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
@media (pointer: coarse) { .fb-btn, .fb-chip { min-height: 44px; } }
@media (prefers-reduced-motion: reduce) { .fb-appear { animation: none; } }

/* статистика задач */
.flag { display: inline-block; font-size: 12px; font-weight: 700; padding: 1px 7px; border-radius: 999px; margin: 1px 2px; }
.flag-hard, .flag-slow { background: #FBE3D6; color: #8A3B0F; }
.flag-easy { background: #E1F2E7; color: #1F6B42; }
.flag-hints, .flag-unclear, .flag-disliked { background: #EAF0FA; color: #24539E; }
table.stats td, table.stats th { font-size: 14px; }
.stuck-names { font-size: 13px; color: var(--muted); }

/* питомцы, профиль, родители, документы */
.who-link { display: inline-flex; align-items: center; gap: 6px; opacity: .85; }
.who-link:hover { opacity: 1; }
.pet-mini { width: 26px; height: 26px; }
.pet-head { width: 44px; height: 44px; vertical-align: middle; margin-right: 10px; }
.profile-head { display: flex; gap: 16px; align-items: center; margin-bottom: 16px; }
.profile-head h1, .profile-head h2 { margin: 0; }
.profile-head p { margin: 2px 0 0; }
.pet-big { width: 84px; height: 84px; flex: none; }
.pet-empty { border-radius: 50%; background: var(--paper-2); display: grid; place-items: center; font: 700 34px var(--font-head); color: var(--muted); }
.pet-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(104px, 1fr)); gap: 10px; margin: 8px 0 16px; }
.pet-option { display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 10px 6px; border-radius: 14px; border: 2px solid var(--line); background: #fff; cursor: pointer; font-weight: 700; font-size: 15px; transition: transform .12s, border-color .12s; }
.pet-option img { width: 64px; height: 64px; }
.pet-option input { position: absolute; opacity: 0; pointer-events: none; }
.pet-option:hover { transform: translateY(-2px); }
.pet-option:has(input:checked) { border-color: var(--accent); background: #FFF4E6; box-shadow: 0 0 0 3px rgba(242,166,90,.35); }
.pet-option:has(input:focus-visible) { outline: 3px solid var(--blue); outline-offset: 2px; }
.pet-name-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.pet-name-row label { font-weight: 700; }
.pet-name-row input { font: 16px var(--font); padding: 9px 12px; border-radius: 10px; border: 2px solid var(--line); min-width: 220px; }
.small { font-size: 14px; }
.invite-box { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; background: var(--blue-soft); border-radius: 12px; padding: 14px 16px; }
.invite-code { font: 700 30px var(--mono); letter-spacing: 3px; background: #fff; border-radius: 10px; padding: 8px 14px; border: 2px dashed var(--blue); }
.invite-url { word-break: break-all; }
.parent-row { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 8px 0; border-top: 1px solid var(--line); flex-wrap: wrap; }
.join label.check { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; font-size: 15px; margin: 6px 0 14px; }
.join label.check input { width: auto; margin: 4px 0 0; flex: none; }
.child-card { margin-bottom: 16px; }
.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; margin-bottom: 14px; }
.stat { background: var(--paper-2); border-radius: 12px; padding: 10px 12px; display: flex; flex-direction: column; }
.stat b { font: 700 28px var(--font-head); }
.stat span { font-size: 14px; color: var(--muted); }
.parent-modules td { vertical-align: middle; }
.recent { list-style: none; padding: 0; margin: 0; }
.recent li { padding: 5px 0; border-top: 1px solid var(--line); }
.tip { background: var(--ok-soft); border-color: transparent; }
.site-foot { max-width: 1180px; margin: 0 auto; padding: 0 20px 30px; display: flex; gap: 18px; flex-wrap: wrap; font-size: 14px; }
.site-foot a { color: var(--muted); }
.doc-list { display: grid; gap: 10px; }
.doc-item { display: block; text-decoration: none; color: inherit; }
.doc-item:hover { border-color: var(--accent-2); }
.doc-item h3 { margin: 0 0 4px; } .doc-item p { margin: 0; }
.tag.draft { background: var(--warn-soft); color: var(--warn); }
.draft-banner { background: var(--warn-soft); color: var(--warn); border-radius: 12px; padding: 10px 14px; margin-bottom: 12px; display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.review-notes { background: var(--blue-soft); border-radius: 12px; padding: 10px 16px; margin-bottom: 12px; }
.review-notes summary { font-weight: 700; cursor: pointer; }
.doc-body { max-width: 860px; line-height: 1.6; }
.doc-body h2 { margin-top: 1.4em; font-size: 20px; }
.doc-body table { border-collapse: collapse; } .doc-body td, .doc-body th { border: 1px solid var(--line); padding: 6px 10px; }
@media print { .doc-body { border: 0; max-width: none; } }
.join input#name { font-family: var(--font); }
.blank { display: inline-block; border-bottom: 1.5px solid var(--ink); min-width: 9em; height: 1.2em; vertical-align: bottom; }
.blank.s { min-width: 3.5em; } .blank.m { min-width: 9em; } .blank.wide { min-width: 22em; max-width: 100%; }
.form-lines p { margin: 0 0 14px; } .form-lines small { color: var(--muted); }
.form-lines.sign { margin-top: 28px; }
@media (max-width: 640px) {
  .pet-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
  .pet-option { padding: 8px 4px; font-size: 13px; }
  .pet-option img { width: 52px; height: 52px; }
  .pet-name-row input { min-width: 0; flex: 1 1 160px; }
  .invite-code { font-size: 24px; }
}
@media (max-width: 900px) {
  .who.who-link { display: inline-flex; }
  .who-link .who-name { display: none; }
}
.pet-mini.pet-none { border-radius: 50%; background: var(--ink-2); display: inline-grid; place-items: center; font-size: 15px; }