:root {
  --bg: #111113;
  --panel: #141416;
  --card: #1c1c1f;
  --card-hover: #242428;
  --border: #2a2a2f;
  --border-strong: #3a3a41;
  --text: #ececef;
  --muted: #8d8d96;
  --faint: #5f5f68;
  --accent: #7f98f7;
  --accent-strong: #6a85f2;
  --accent-soft: rgba(127, 152, 247, .14);
  --good: #3fb97a;
  --good-soft: rgba(63, 185, 122, .13);
  --mid: #d9a93b;
  --weak: #e2574f;
  --weak-soft: rgba(226, 87, 79, .13);
  --review: #f08a3c;
  --review-soft: rgba(240, 138, 60, .14);
  --radius: 10px;
  --mono: ui-monospace, "JetBrains Mono", "Cascadia Code", Consolas, "Courier New", monospace;
  --on-accent: #fff;
  --input-bg: #111114;
  --code-bg: #121215;
  --topbar-bg: rgba(17, 17, 19, .92);
  --track: rgba(255, 255, 255, .07);
  --subtle: rgba(255, 255, 255, .03);
  --linked: #c4c4cc;
  --answer-bg: rgba(0, 0, 0, .25);
  --overlay: rgba(0, 0, 0, .6);
  --overlay-strong: rgba(8, 8, 10, .92);
  --shadow: 0 20px 60px rgba(0, 0, 0, .5);
  --focus: 0 0 0 3px var(--accent-soft), 0 0 0 1px var(--accent);
  color-scheme: dark;
}

/* светлая тема: по настройке системы или по кнопке в панели */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f6f7f9; --panel: #ffffff; --card: #ffffff; --card-hover: #f0f2f6;
    --border: #e3e5ea; --border-strong: #cfd3db;
    --text: #1b1d22; --muted: #646a76; --faint: #9aa0ab;
    --accent: #4b67e0; --accent-strong: #3b56cc; --accent-soft: rgba(75, 103, 224, .12);
    --good: #1f9a5c; --good-soft: rgba(31, 154, 92, .1);
    --mid: #b7861a; --weak: #d03f37; --weak-soft: rgba(208, 63, 55, .09);
    --review: #d96d1f; --review-soft: rgba(217, 109, 31, .1);
    --input-bg: #ffffff; --code-bg: #f4f5f8; --topbar-bg: rgba(246, 247, 249, .9);
    --track: rgba(0, 0, 0, .08); --subtle: rgba(0, 0, 0, .03); --linked: #4a4f5a;
    --answer-bg: rgba(0, 0, 0, .06); --overlay: rgba(20, 22, 28, .45); --overlay-strong: rgba(240, 242, 246, .94);
    --shadow: 0 20px 50px rgba(20, 22, 28, .18);
    color-scheme: light;
  }
}
:root[data-theme="light"] {
  --bg: #f6f7f9; --panel: #ffffff; --card: #ffffff; --card-hover: #f0f2f6;
  --border: #e3e5ea; --border-strong: #cfd3db;
  --text: #1b1d22; --muted: #646a76; --faint: #9aa0ab;
  --accent: #4b67e0; --accent-strong: #3b56cc; --accent-soft: rgba(75, 103, 224, .12);
  --good: #1f9a5c; --good-soft: rgba(31, 154, 92, .1);
  --mid: #b7861a; --weak: #d03f37; --weak-soft: rgba(208, 63, 55, .09);
  --review: #d96d1f; --review-soft: rgba(217, 109, 31, .1);
  --input-bg: #ffffff; --code-bg: #f4f5f8; --topbar-bg: rgba(246, 247, 249, .9);
  --track: rgba(0, 0, 0, .08); --subtle: rgba(0, 0, 0, .03); --linked: #4a4f5a;
  --answer-bg: rgba(0, 0, 0, .06); --overlay: rgba(20, 22, 28, .45); --overlay-strong: rgba(240, 242, 246, .94);
  --shadow: 0 20px 50px rgba(20, 22, 28, .18);
  color-scheme: light;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
button { font: inherit; color: inherit; }
a { color: var(--accent); }
:focus { outline: none; }
:focus-visible { outline: none; box-shadow: var(--focus); border-radius: 6px; }
.btn:focus-visible, .num-card:focus-visible, .all-card:focus-visible, .forecast:focus-visible { box-shadow: var(--focus); }
kbd {
  font: 11px var(--mono); padding: 1px 5px; border-radius: 4px;
  border: 1px solid var(--border-strong); background: var(--subtle); color: var(--muted);
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }

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

/* ---------------- sidebar ---------------- */
.sidebar {
  width: 262px;
  flex: 0 0 262px;
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 18px 14px 20px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.sidebar > * { flex-shrink: 0; }
.brand-row { display: flex; align-items: center; gap: 8px; }
.brand { display: flex; flex-direction: column; padding: 0 4px 2px; flex: 1; min-width: 0; }
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px; flex: 0 0 auto;
  height: 32px; min-width: 32px; padding: 0 8px; border-radius: 8px; cursor: pointer;
  background: transparent; border: 1px solid var(--border); color: var(--muted);
  transition: background .12s, color .12s, border-color .12s;
}
.icon-btn:hover { background: var(--card-hover); color: var(--text); }
.icon-btn svg { width: 16px; height: 16px; }
.theme-btn .i-sun { display: none; }
:root[data-theme="dark"] .theme-btn .i-sun { display: block; }
:root[data-theme="dark"] .theme-btn .i-moon { display: none; }
:root[data-theme="light"] .theme-btn .i-moon { display: block; }
@media (prefers-color-scheme: dark) { :root:not([data-theme]) .theme-btn .i-sun { display: block; } :root:not([data-theme]) .theme-btn .i-moon { display: none; } }
.side-toggle { display: none; font-size: 13px; color: var(--text); }
.side-toggle svg { transition: transform .15s; }
.sidebar.open .side-toggle svg { transform: rotate(180deg); }
.side-body { display: flex; flex-direction: column; gap: 12px; flex: 1; }
.side-body > * { flex-shrink: 0; }
.kbd-help { display: flex; flex-direction: column; gap: 4px; font-size: 11.5px; color: var(--faint); padding: 0 4px; }
.brand-title { font-weight: 650; letter-spacing: .01em; }
.brand-sub { color: var(--muted); font-size: 12px; }

.who {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  background: var(--card); border: 1px solid var(--border); border-radius: 9px; padding: 7px 10px;
}
.who[hidden] { display: none; }
.who-name { display: flex; flex-direction: column; min-width: 0; }
.who-label { font-size: 11px; color: var(--muted); }
.who-name b { font-weight: 600; font-size: 13.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.who .link-btn { font-size: 12px; flex: 0 0 auto; }

.modal.login-modal { align-items: center; background: var(--overlay-strong); backdrop-filter: blur(6px); }
.login-panel { max-width: 460px; }
.login-form { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 4px; }
.login-form .inp { flex: 1 1 240px; font-family: inherit; }
.login-stack { flex-direction: column; align-items: stretch; gap: 10px; }
.login-stack .btn { align-self: flex-start; }
.login-stack .btn-block { align-self: stretch; padding: 11px 16px; }
.login-field { display: flex; flex-direction: column; gap: 5px; font-size: 12.5px; color: var(--muted); }
.login-field .inp { flex: none; width: 100%; }
.login-err { color: var(--weak); font-size: 13.5px; min-height: 1.4em; margin-top: 8px; }

.banks { display: flex; flex-wrap: wrap; gap: 4px; background: var(--card); border: 1px solid var(--border); border-radius: 9px; padding: 3px; }
.banks button {
  flex: 1; border: 0; background: transparent; border-radius: 6px; padding: 5px 4px;
  font-size: 12px; color: var(--muted); cursor: pointer; white-space: nowrap;
}
.banks button.on { background: var(--card-hover); color: var(--text); }

.period { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--muted); padding: 0 2px; }
.period select {
  flex: 1; min-width: 0; background: var(--card); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 6px 8px; font: inherit; font-size: 12.5px; cursor: pointer;
}
.period select:focus { outline: none; border-color: var(--accent); }
.head-chips { margin-left: auto; display: inline-flex; gap: 6px; flex-wrap: wrap; }

.all-card, .num-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: background .12s, border-color .12s;
  overflow: hidden;
}
.all-card { padding: 11px 8px 13px; width: 100%; }
.all-title { font-size: 15px; }
.all-count { font-size: 11px; color: var(--muted); margin-top: 1px; }
.all-card:hover, .num-card:hover { background: var(--card-hover); }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.num-card { height: 58px; padding: 0; }
.num-card .n { font-size: 16px; line-height: 1.2; }
.num-card .c { font-size: 11px; color: var(--muted); line-height: 1.3; }
.num-card:disabled { opacity: .35; cursor: default; }
.num-card.wide { grid-column: span 3; }
.num-card.wide .n { letter-spacing: .02em; }
.num-card:disabled:hover { background: var(--card); }

.all-card.on, .num-card.on {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
}
.num-card.has-review { border-color: rgba(240, 138, 60, .45); }
.all-card.on .all-count, .num-card.on .c { color: rgba(255, 255, 255, .85); }

/* полоска освоения внизу карточки */
.bar {
  position: absolute; left: 8px; right: 8px; bottom: 5px; height: 3px;
  border-radius: 2px; background: transparent; overflow: hidden;
}
.bar b { display: block; height: 100%; width: 0; border-radius: 2px; }
.has-progress .bar { background: var(--track); }
.lvl-weak .bar b { background: var(--weak); }
.lvl-mid .bar b { background: var(--mid); }
.lvl-good .bar b { background: var(--good); }
.on .bar { background: rgba(255, 255, 255, .25); }
.on .bar b { background: #fff; }

.dot {
  position: absolute; top: 6px; right: 6px; width: 7px; height: 7px; border-radius: 50%;
  background: var(--review); display: none;
}
.has-review .dot { display: block; }
.on .dot { background: #fff; }

.legend {
  display: grid; grid-template-columns: 1fr 1fr; gap: 4px 8px;
  font-size: 11.5px; color: var(--muted); padding: 2px 4px;
}
.legend span { display: flex; align-items: center; gap: 6px; }
.lg { display: inline-block; width: 12px; height: 3px; border-radius: 2px; }
.lg-weak { background: var(--weak); }
.lg-mid { background: var(--mid); }
.lg-good { background: var(--good); }
.lg-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--review); }

.side-actions { margin-top: auto; display: flex; flex-direction: column; align-items: flex-start; gap: 2px; padding: 8px 4px 0; border-top: 1px solid var(--border); }
.link-btn { background: none; border: 0; padding: 4px 0; color: var(--muted); font-size: 12.5px; cursor: pointer; }
.link-btn:hover { color: var(--text); }
.link-btn.danger:hover { color: var(--weak); }

/* ---------------- main ---------------- */
.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar {
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
  padding: 16px 32px; border-bottom: 1px solid var(--border);
  position: sticky; top: 0; background: var(--topbar-bg); backdrop-filter: blur(8px); z-index: 5;
}
.scope-info { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; flex: 1; min-width: 0; }

/* прогноз балла */
.forecast {
  display: grid; grid-template-columns: auto auto; grid-template-rows: auto auto; column-gap: 10px;
  align-items: center; text-align: left; cursor: pointer;
  background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 7px 14px 7px 12px;
  transition: border-color .12s, background .12s; --band: var(--muted);
}
.forecast:hover { background: var(--card-hover); border-color: var(--band); }
.forecast .fc-label { grid-column: 1 / 3; font-size: 11px; color: var(--muted); letter-spacing: .02em; }
.forecast .fc-main { display: flex; align-items: baseline; gap: 2px; }
.forecast .fc-value { font-size: 26px; font-weight: 700; line-height: 1.05; color: var(--band); font-variant-numeric: tabular-nums; }
.forecast .fc-max { font-size: 12px; color: var(--faint); }
.forecast .fc-range { font-size: 12px; color: var(--muted); align-self: end; padding-bottom: 3px; white-space: nowrap; }
.forecast.fc-empty .fc-value { color: var(--faint); }
.band-weak { --band: var(--weak); }
.band-mid { --band: var(--mid); }
.band-accent { --band: var(--accent); }
.band-good { --band: var(--good); }

.modal {
  position: fixed; inset: 0; background: var(--overlay); z-index: 40;
  display: flex; align-items: flex-start; justify-content: center; padding: 48px 16px; overflow-y: auto;
}
.modal[hidden] { display: none; }
.modal-panel {
  position: relative; width: 100%; max-width: 720px; background: var(--panel); border: 1px solid var(--border-strong);
  border-radius: 14px; padding: 24px 26px 22px; box-shadow: var(--shadow); animation: pop .16s ease-out;
}
.fm-close {
  position: absolute; top: 10px; right: 12px; width: 32px; height: 32px; border-radius: 8px;
  background: transparent; border: 0; color: var(--muted); font-size: 22px; line-height: 1; cursor: pointer;
}
.fm-close:hover { background: var(--card-hover); color: var(--text); }
.fm-title { margin: 0 0 8px; font-size: 20px; }
.fm-head { display: flex; gap: 24px; align-items: center; flex-wrap: wrap; margin-bottom: 14px; }
.fm-score { display: flex; align-items: center; gap: 12px; }
.fm-big { font-size: 56px; font-weight: 750; line-height: 1; color: var(--band); font-variant-numeric: tabular-nums; }
.fm-sub { font-size: 13px; color: var(--muted); line-height: 1.35; }
.fm-facts { display: flex; flex-direction: column; gap: 6px; font-size: 14px; }
.fm-facts b { font-weight: 650; }
.fm-chips { display: flex; gap: 6px; flex-wrap: wrap; }
.fm-note { color: var(--muted); font-size: 13.5px; margin: 0 0 14px; }
.fm-muted { color: var(--muted); }
.fm-where { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; margin-bottom: 14px; display: flex; flex-direction: column; gap: 8px; }
.fm-h { font-weight: 600; font-size: 14px; }
.fm-line { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; font-size: 13px; }
.num-chip { cursor: pointer; }
.num-chip:hover { border-color: var(--accent); color: var(--text); }
.num-chip:disabled { opacity: .4; cursor: default; }
.fm-table-wrap { overflow-x: auto; }
.fm-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.fm-table th { text-align: left; font-weight: 500; color: var(--muted); font-size: 12px; padding: 6px 8px; border-bottom: 1px solid var(--border); }
.fm-table td { padding: 5px 8px; border-bottom: 1px solid var(--border); white-space: nowrap; font-variant-numeric: tabular-nums; }
.fm-table .fm-n .link-btn { color: var(--text); font-weight: 600; font-size: 13.5px; padding: 0; }
.fm-table .fm-n .link-btn:hover { color: var(--accent); }
.fm-bar-cell { display: inline-flex; align-items: center; gap: 8px; vertical-align: middle; }
.fm-bar { display: inline-block; width: 120px; height: 6px; border-radius: 3px; background: var(--track); overflow: hidden; }
.fm-bar b { display: block; height: 100%; border-radius: 3px; background: var(--muted); }
.lv-weak .fm-bar b { background: var(--weak); }
.lv-mid .fm-bar b { background: var(--mid); }
.lv-good .fm-bar b { background: var(--good); }
.fm-how { margin-top: 14px; font-size: 13.5px; color: var(--muted); }
.fm-how summary { cursor: pointer; color: var(--text); }
.fm-how p { margin: 8px 0 0; line-height: 1.55; }
.scope-title { font-size: 18px; font-weight: 650; }
.scope-stats { color: var(--muted); font-size: 13px; }
.chip {
  display: inline-flex; align-items: center; gap: 5px; font-size: 12px; padding: 2px 9px;
  border-radius: 999px; background: var(--card); border: 1px solid var(--border); color: var(--muted);
  white-space: nowrap;
}
.chip.weak { color: var(--weak); border-color: rgba(226, 87, 79, .35); background: var(--weak-soft); }
.chip.mid { color: var(--mid); border-color: rgba(217, 169, 59, .35); background: rgba(217, 169, 59, .1); }
.chip.good { color: var(--good); border-color: rgba(63, 185, 122, .35); background: var(--good-soft); }
.chip.review { color: var(--review); border-color: rgba(240, 138, 60, .35); background: var(--review-soft); }
.chip.accent { color: var(--accent); border-color: rgba(127, 152, 247, .35); background: var(--accent-soft); }

.session-info { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 13px; }
.session-info b { color: var(--text); font-weight: 600; }
.dots { display: flex; gap: 3px; }
.dots i { width: 8px; height: 8px; border-radius: 2px; background: var(--border-strong); }
.dots i.s1 { background: var(--good); }
.dots i.s05 { background: var(--mid); }
.dots i.s0 { background: var(--weak); }

.trainer { width: 100%; max-width: 920px; margin: 0 auto; padding: 26px 32px 60px; }

.task-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 8px; }
.num-badge {
  display: inline-flex; align-items: center; justify-content: center; min-width: 34px; height: 34px;
  padding: 0 8px; border-radius: 9px; background: var(--accent); color: #fff; font-weight: 650; font-size: 16px;
}
.task-meta { color: var(--muted); font-size: 13px; display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.task-meta .sep { color: var(--faint); }

.reason { font-size: 13px; color: var(--muted); margin: 0 0 14px; }
.reason b { color: var(--text); font-weight: 600; }

/* условие */
.cond {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  font-size: 16px;
  line-height: 1.65;
  overflow-wrap: anywhere;
}
.cond > :first-child, .cond > div > :first-child, .cond > div > div > :first-child { margin-top: 0; }
.cond p { margin: 0 0 .8em; }
.cond p:last-child { margin-bottom: 0; }
.cond img {
  max-width: 100%; height: auto; background: #fff; border-radius: 6px; padding: 4px;
  cursor: zoom-in; vertical-align: middle;
}
.cond .table-wrap { overflow-x: auto; margin: .6em 0 1em; max-width: 100%; }
.cond table { border-collapse: collapse; width: auto !important; max-width: none; font-size: 14.5px; }
.cond td, .cond th { border: 1px solid var(--border-strong); padding: 4px 9px; text-align: center; min-width: 28px; }
.cond th { background: var(--subtle); font-weight: 600; }
.cond pre, .cond code { font-family: var(--mono); font-size: 14px; }
.cond pre {
  background: var(--code-bg); border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px;
  overflow-x: auto; line-height: 1.5;
}
.cond ol, .cond ul { padding-left: 1.4em; margin: 0 0 .8em; }
.cond hr.subtask-sep { border: 0; border-top: 1px dashed var(--border-strong); margin: 1.2em 0; }
.cond .gq-title { font-size: 15px; font-weight: 650; margin: 1.3em 0 .45em; color: var(--accent); }
.cond > .gq-title:first-child, .cond > div > .gq-title:first-child { margin-top: 0; }
.cond .q-section { transition: opacity .15s; }
.cond .q-own { border-left: 3px solid var(--accent); padding: 2px 0 2px 14px; margin-left: -17px; }
.cond .q-other { opacity: .45; }
.cond .q-other:hover { opacity: .8; }
.cond .q-tag { font-size: 12px; font-weight: 600; color: var(--accent); margin-bottom: 4px; letter-spacing: .01em; }
.cond .linked-task { border-left: 3px solid var(--border-strong); padding-left: 14px; color: var(--linked); font-size: 15px; }
.cond .linked-task > p:first-child { color: var(--muted); font-size: 13px; margin-bottom: .5em; }
.cond .katex { font-size: 1.05em; }

.img-missing {
  display: inline-block; margin: 4px 0; padding: 8px 12px; border-radius: 8px; font-size: 13.5px; line-height: 1.45;
  color: var(--text); background: var(--review-soft); border: 1px dashed rgba(240, 138, 60, .5);
}
.img-missing b { color: var(--review); font-weight: 600; }
.files { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 12px; font-size: 13px; color: var(--muted); }
.file {
  display: inline-flex; align-items: center; gap: 7px; padding: 6px 12px; border-radius: 8px;
  background: var(--card); border: 1px solid var(--border); color: var(--text); text-decoration: none; font-size: 13.5px;
}
.file:hover { border-color: var(--accent); }
.file svg { width: 15px; height: 15px; color: var(--accent); flex: 0 0 auto; }

/* ответ */
.answer { margin-top: 18px; background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px 20px; }
.answer-label { font-size: 13px; color: var(--muted); margin-bottom: 8px; }
.answer-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-start; }
.inp {
  background: var(--input-bg); border: 1px solid var(--border-strong); border-radius: 8px; color: var(--text);
  font: 16px/1.2 var(--mono); padding: 10px 12px; outline: none; transition: border-color .12s, box-shadow .12s;
}
.inp:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.inp:disabled { opacity: .75; }
.inp-single { width: 260px; max-width: 100%; }
.grid-inp { display: inline-grid; gap: 4px; }
.grid-inp .inp { width: 120px; padding: 7px 9px; font-size: 15px; text-align: center; }
.grid-inp .rowlab { font-size: 12px; color: var(--faint); align-self: center; text-align: right; padding-right: 4px; }
.inp.ok { border-color: var(--good); background: var(--good-soft); }
.inp.bad { border-color: var(--weak); }
.inp.bad:not(:disabled) { animation: shake .28s; }
@keyframes shake { 25% { transform: translateX(-3px); } 75% { transform: translateX(3px); } }
@keyframes pop { from { opacity: 0; transform: translateY(6px) scale(.99); } }

.actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.btn {
  border: 1px solid var(--border-strong); background: transparent; border-radius: 8px; padding: 9px 16px;
  cursor: pointer; font-size: 14px; transition: background .12s, border-color .12s;
}
.btn:hover { background: var(--card-hover); }
.btn:disabled { opacity: .55; cursor: progress; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); font-weight: 600; }
.btn.primary:hover { background: var(--accent-strong); }
.btn.ghost { border-color: transparent; color: var(--muted); }
.btn.ghost:hover { color: var(--text); }
.btn kbd { font: 11px var(--mono); opacity: .75; margin-left: 8px; padding: 0 4px; border: 0; background: rgba(255, 255, 255, .18); color: inherit; }
.btn:not(.primary) kbd { background: var(--subtle); }

.num-badge.sm { min-width: 34px; height: 30px; font-size: 14px; border-radius: 8px; flex: 0 0 auto; }
/* 19–21: карточка вопроса, под ней ответ */
.gq-list { display: flex; flex-direction: column; }
.gq-card { transition: border-color .15s; }
.gq-num { margin-bottom: 10px; }
.gq-card.ok { border-color: rgba(63, 185, 122, .55); }
.gq-card.bad { border-color: rgba(226, 87, 79, .55); }
.gq-card.retry { border-color: rgba(240, 138, 60, .55); }
.gq-card.ok .gq-num .num-badge { background: var(--good); }
.gq-card.bad .gq-num .num-badge { background: var(--weak); }
.gq-card.retry .gq-num .num-badge { background: var(--review); }
.gpart { margin: 10px 0 22px; padding: 0 2px; }
.gq-list > .gpart:last-child { margin-bottom: 4px; }
.gpart-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.gpart-label { font-size: 13px; color: var(--muted); min-width: 64px; }
.gpart-inputs .inp-single { width: 200px; }
.gpart-hint { font-size: 12.5px; color: var(--faint); }
.gpart-fb { font-size: 14px; margin: 6px 0 0 0; }
.gpart-fb:empty { display: none; }
.gpart-fb .solution { margin-top: 6px; }
.gp-ok { color: var(--good); font-weight: 600; }
.gp-bad { color: var(--weak); font-weight: 600; }
.gp-retry { color: var(--review); }
.gpart.ok .num-badge { background: var(--good); }
.gpart.bad .num-badge { background: var(--weak); }
.gpart.retry .num-badge { background: var(--review); }
.answer-group { margin-top: 6px; }
.feedback { margin-top: 12px; border-radius: 10px; padding: 12px 14px; font-size: 14.5px; display: none; }
.feedback.show { display: block; animation: pop .18s ease-out; }
.feedback.ok { background: var(--good-soft); border: 1px solid rgba(63, 185, 122, .3); }
.feedback.retry { background: var(--review-soft); border: 1px solid rgba(240, 138, 60, .3); }
.feedback.bad { background: var(--weak-soft); border: 1px solid rgba(226, 87, 79, .3); }
.feedback .fb-title { font-weight: 650; margin-bottom: 2px; }
.feedback.ok .fb-title { color: var(--good); }
.feedback.retry .fb-title { color: var(--review); }
.feedback.bad .fb-title { color: var(--weak); }
.feedback .fb-note { color: var(--muted); font-size: 13.5px; }
.feedback .right-answer { font-family: var(--mono); background: var(--answer-bg); padding: 1px 7px; border-radius: 5px; color: var(--text); }
.feedback table.right-answer { padding: 0; border-collapse: collapse; margin: 6px 0; }
.feedback table.right-answer td { border: 1px solid var(--border-strong); padding: 3px 10px; }
.feedback .fb-links { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 8px; font-size: 13.5px; }
.solution { margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--border); }

.empty { text-align: center; color: var(--muted); padding: 60px 20px; }
.empty h2 { color: var(--text); font-weight: 600; font-size: 20px; }
.empty code { font-family: var(--mono); background: var(--card); border: 1px solid var(--border); padding: 2px 8px; border-radius: 6px; color: var(--text); }
.empty pre { display: inline-block; text-align: left; font-family: var(--mono); background: var(--card); border: 1px solid var(--border); padding: 12px 16px; border-radius: 8px; color: var(--text); }

.lightbox {
  position: fixed; inset: 0; background: rgba(0, 0, 0, .82); display: flex; align-items: center; justify-content: center;
  z-index: 50; cursor: zoom-out; padding: 24px;
}
.lightbox[hidden] { display: none; }
.lightbox img { max-width: 100%; max-height: 100%; background: #fff; border-radius: 8px; padding: 8px; }

.toasts {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); z-index: 60;
  display: flex; flex-direction: column; align-items: center; gap: 8px; pointer-events: none; width: max-content; max-width: calc(100vw - 32px);
}
.toast {
  background: var(--card); color: var(--text); border: 1px solid var(--border-strong); padding: 10px 16px;
  border-radius: 10px; font-size: 14px; box-shadow: var(--shadow); animation: pop .18s ease-out; transition: opacity .25s;
}
.toast.out { opacity: 0; }

/* ---------------- избранное, вариант, поиск ---------------- */
.mode-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.mode-card {
  display: flex; flex-direction: column; align-items: flex-start; gap: 1px; padding: 8px 10px; min-width: 0;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); cursor: pointer; text-align: left;
  transition: background .12s, border-color .12s;
}
.mode-card:hover { background: var(--card-hover); }
.mode-title { font-size: 13px; font-weight: 600; white-space: nowrap; }
.mode-sub { font-size: 11px; color: var(--muted); white-space: nowrap; font-variant-numeric: tabular-nums; }
.mode-card.on { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.mode-card.on .mode-sub { color: rgba(255, 255, 255, .85); }
.exam-card { border-color: rgba(127, 152, 247, .45); }
.search { display: flex; gap: 6px; }
.search .inp { flex: 1; min-width: 0; font: 13px/1.2 inherit; font-family: inherit; padding: 7px 10px; }
.search .icon-btn { height: auto; }

.task-tools { display: inline-flex; gap: 6px; }
.head-chips + .task-tools { margin-left: 0; }
.task-head .head-chips { margin-left: auto; }
.fav-btn { font-size: 16px; line-height: 1; }
.fav-btn.on { color: var(--mid); border-color: rgba(217, 169, 59, .5); }
.note-btn { font-size: 13px; }
.note-btn span { font-size: 12.5px; }
.note-btn.on { color: var(--accent); border-color: rgba(127, 152, 247, .5); }
.note-box { margin-top: 14px; display: flex; flex-direction: column; gap: 6px; }
.note-box[hidden] { display: none; }
.note-box label { font-size: 13px; color: var(--muted); }
.note-box label span { color: var(--faint); font-size: 12px; margin-left: 6px; }
.note-box textarea { width: 100%; resize: vertical; min-height: 70px; font: 14.5px/1.5 inherit; font-family: inherit; }

/* ответ скрыт: время на раздумье или лимит */
.hidden-ans { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin: 4px 0 2px; }
.hidden-ans .ha-text { flex: 1 1 260px; font-size: 13.5px; color: var(--text); }
.hidden-ans .btn { padding: 6px 12px; font-size: 13px; }

/* цель на день */
.goal {
  display: inline-flex; flex-direction: column; gap: 4px; align-items: stretch; cursor: pointer;
  background: transparent; border: 1px solid transparent; border-radius: 8px; padding: 3px 6px; color: var(--muted); font-size: 13px;
}
.goal:hover { border-color: var(--border); background: var(--card); }
.goal b { color: var(--text); font-weight: 600; }
.goal-of { color: var(--faint); }
.goal-bar { display: block; height: 4px; border-radius: 2px; background: var(--track); overflow: hidden; }
.goal-bar b { display: block; height: 100%; border-radius: 2px; background: var(--accent); }
.goal.done .goal-bar b { background: var(--good); }
.session-info { position: relative; }
.chip.streak { color: var(--review); border-color: rgba(240, 138, 60, .35); background: var(--review-soft); }
.goal-menu {
  position: absolute; top: calc(100% + 6px); right: 0; z-index: 20; min-width: 170px; padding: 6px;
  display: flex; flex-direction: column; background: var(--panel); border: 1px solid var(--border-strong); border-radius: 10px; box-shadow: var(--shadow);
}
.goal-menu[hidden] { display: none; }
.goal-menu-h { font-size: 11.5px; color: var(--muted); padding: 4px 8px 6px; }
.goal-menu button { text-align: left; background: none; border: 0; border-radius: 6px; padding: 7px 8px; cursor: pointer; font-size: 13.5px; }
.goal-menu button:hover { background: var(--card-hover); }
.goal-menu button.on { color: var(--accent); font-weight: 600; }

/* график прогноза */
.fm-chart-wrap { margin: 4px 0 14px; display: flex; flex-direction: column; gap: 6px; }
.fc-chart { position: relative; }
.fc-chart svg { display: block; width: 100%; height: 170px; overflow: visible; touch-action: pan-y; }
.fc-grid { stroke: var(--border); stroke-width: 1; vector-effect: non-scaling-stroke; }
.fc-thr { stroke: var(--muted); stroke-width: 1; stroke-dasharray: 4 4; vector-effect: non-scaling-stroke; }
.fc-ax { fill: var(--muted); font-size: 11px; }
.fc-line { fill: none; stroke: var(--accent); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; vector-effect: non-scaling-stroke; }
.fc-area { fill: var(--accent-soft); stroke: none; }
.fc-dot, .fc-hover { fill: var(--accent); stroke: var(--panel); stroke-width: 2; vector-effect: non-scaling-stroke; }
.fc-cross { stroke: var(--border-strong); stroke-width: 1; vector-effect: non-scaling-stroke; }
.fc-tip {
  position: absolute; transform: translate(-50%, calc(-100% - 12px)); pointer-events: none; white-space: nowrap;
  background: var(--card); border: 1px solid var(--border-strong); border-radius: 8px; padding: 4px 9px; font-size: 12.5px; box-shadow: var(--shadow);
  display: flex; gap: 6px; align-items: baseline;
}
.fc-tip[hidden] { display: none; }
.fc-tip span { color: var(--muted); }
.fc-chart-empty { margin: 0; }

/* вариант ЕГЭ */
.ex-nav { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 16px; }
.ex-nav-btn {
  min-width: 34px; height: 30px; padding: 0 6px; border-radius: 7px; cursor: pointer; font-size: 13px; font-variant-numeric: tabular-nums;
  background: var(--card); border: 1px solid var(--border); color: var(--muted);
}
.ex-nav-btn.wide { min-width: 52px; }
.ex-nav-btn.done { color: var(--text); border-color: var(--accent); background: var(--accent-soft); }
.ex-nav-btn.on { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.ex-clock { font: 600 18px/1 var(--mono); font-variant-numeric: tabular-nums; color: var(--text); }
.ex-clock.warn { color: var(--weak); }
.ex-rules { margin: 4px 0 18px; padding-left: 1.2em; display: flex; flex-direction: column; gap: 6px; font-size: 14.5px; }
.ex-result .fm-title { margin-bottom: 14px; }
.ex-table .ans { font-family: var(--mono); font-size: 13.5px; white-space: normal; }
.ex-pts { font-variant-numeric: tabular-nums; font-weight: 600; }
.ex-table .lv-good .ex-pts { color: var(--good); }
.ex-table .lv-mid .ex-pts { color: var(--mid); }
.ex-table .lv-weak .ex-pts { color: var(--weak); }

/* ---------------- mobile ---------------- */
@media (max-width: 860px) {
  html { scroll-padding-top: 64px; }
  .app { flex-direction: column; }
  .sidebar {
    width: 100%; flex: none; height: auto; max-height: 100vh; position: sticky; top: 0; z-index: 20;
    border-right: 0; border-bottom: 1px solid var(--border); padding: 10px 14px; gap: 10px;
  }
  .brand-title { font-size: 14.5px; }
  .brand-sub { display: none; }
  .side-toggle { display: inline-flex; }
  .side-body { display: none; padding-bottom: 6px; }
  .sidebar.open .side-body { display: flex; }
  .sidebar:not(.open) .who { display: none; }
  .kbd-help { display: none; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(52px, 1fr)); gap: 6px; }
  .num-card { height: 50px; }
  .side-actions { flex-direction: row; flex-wrap: wrap; gap: 4px 14px; }
  .topbar { padding: 12px 16px; position: static; gap: 10px; }
  .session-info { width: 100%; justify-content: space-between; }
  .actions .btn { flex: 1 1 auto; }
  .actions .btn.ghost { flex: 0 0 auto; }
  .btn kbd { display: none; }
  .note-btn span { display: none; }
  .task-head .head-chips { margin-left: 0; }
  .task-tools { margin-left: auto; }
  .goal-menu { right: auto; left: 0; }
  .scope-title { font-size: 16px; }
  .forecast { padding: 6px 10px; }
  .modal { padding: 12px 8px; }
  .modal-panel { padding: 20px 16px; }
  .fm-bar { width: 70px; }
  .trainer { padding: 18px 16px 48px; }
  .cond { padding: 16px; font-size: 15.5px; }
  .grid-inp .inp { width: 96px; }
}