/* ================= токены ================= */
:root {
  color-scheme: light;
  --ground: #FFFFFF;
  --surface: #FFFFFF;
  --surface-2: #F4F5F7;
  --ink: #16181D;
  --ink-2: #414753;
  --muted: #6B7280;
  --line: #E3E5EA;
  --line-strong: #C7CBD4;
  --accent: #2C5CE6;
  --accent-ink: #1B3FA8;
  --accent-soft: #E8EDFD;
  --signal: #9A5B00;
  --signal-soft: #FCEFD9;
  --wrong: #A32B1E;
  --wrong-soft: #F9E3E0;
  --on-accent: #FFFFFF;
  --shadow: 0 1px 2px rgba(22,24,29,.05), 0 10px 28px -18px rgba(22,24,29,.30);
  --font-display: "Bitter", Georgia, "Times New Roman", serif;
  --font-body: "Golos Text", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Consolas, monospace;
  --radius: 10px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}
body {
  margin: 0; background: var(--ground); color: var(--ink);
  font-family: var(--font-body); font-size: 16px; line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
a { color: var(--accent-ink); text-underline-offset: 3px; }
button { font-family: inherit; font-size: inherit; cursor: pointer; }

.wrap { max-width: 900px; margin: 0 auto; padding: 0 20px 90px; }
.wrap-wide { max-width: 1100px; }
.label {
  font-family: var(--font-mono); font-size: 11px; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase; color: var(--muted);
}
.num { font-variant-numeric: tabular-nums; }
.hidden { display: none !important; }

/* ================= шапка ================= */
.site {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--ground) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-in {
  max-width: 1100px; margin: 0 auto; padding: 10px 20px;
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
}
.site-name {
  font-family: var(--font-display); font-weight: 700; font-size: 17px;
  color: var(--ink); text-decoration: none; white-space: nowrap;
}
.site-nav { display: flex; gap: 4px; flex: 1; flex-wrap: wrap; }
.site-nav a {
  font-family: var(--font-mono); font-size: 12px; text-decoration: none;
  color: var(--muted); padding: 4px 9px; border-radius: 999px;
}
.site-nav a:hover { color: var(--accent-ink); background: var(--accent-soft); }
.site-nav a.on { color: var(--accent-ink); background: var(--accent-soft); }
.chip {
  display: flex; align-items: center; gap: 9px; font-size: 13px; color: var(--ink-2);
}
.avatar {
  width: 27px; height: 27px; border-radius: 50%; display: grid; place-items: center;
  background: var(--accent); color: var(--on-accent);
  font-family: var(--font-mono); font-size: 11.5px; font-weight: 600;
}
.btn-link {
  border: 0; background: none; color: var(--muted); font-size: 12.5px;
  padding: 2px 4px; text-decoration: underline; text-underline-offset: 3px;
}
.btn-link:hover { color: var(--accent-ink); }

/* ================= общие блоки ================= */
.panel {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px 24px;
}
h1 {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(30px, 5vw, 50px); line-height: 1.1;
  letter-spacing: -.015em; margin: 0 0 14px; text-wrap: balance;
}
.lede { color: var(--ink-2); font-size: 17.5px; line-height: 1.65; max-width: 62ch; margin: 0 0 24px; }
.eyelead {
  display: block; font-size: 13px; font-weight: 600; letter-spacing: .1em;
  text-transform: uppercase; color: var(--accent); margin: 0 0 16px;
}
.eyebrow {
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--accent-ink); margin: 34px 0 12px;
}
.btn {
  border: 1px solid var(--accent); background: var(--accent); color: var(--on-accent);
  border-radius: 8px; padding: 10px 18px; font-weight: 500; font-size: 15px;
  text-decoration: none; display: inline-block; transition: opacity .15s ease;
}
.btn:hover { opacity: .88; }
.btn:disabled { opacity: .4; cursor: not-allowed; }
.btn-ghost {
  border: 1px solid var(--line-strong); background: transparent; color: var(--ink-2);
  border-radius: 8px; padding: 9px 16px; font-size: 14px; text-decoration: none;
  display: inline-block;
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-ink); }
.actions { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

/* ================= выбор профиля ================= */
.gate { margin: 24px 0; }
.gate-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 14px; margin-top: 18px;
}
.slot {
  border: 1px solid var(--line); border-radius: var(--radius); color: var(--ink);
  background: var(--surface); padding: 18px; display: flex;
  flex-direction: column; gap: 11px; text-align: left; font-size: 15px;
}
.slot.taken:hover { border-color: var(--accent); }
.slot-name { font-family: var(--font-display); font-size: 17px; font-weight: 600; }
.slot-stat { font-family: var(--font-mono); font-size: 12px; color: var(--muted); }
.slot input {
  font-family: inherit; font-size: 15px; padding: 9px 12px; width: 100%;
  border: 1px solid var(--line-strong); border-radius: 8px;
  background: var(--ground); color: var(--ink);
}

/* ================= сравнение ================= */
.versus { display: grid; grid-template-columns: 1fr auto 1fr; gap: 14px; margin-bottom: 24px; }
.vs-side { padding: 16px 18px; }
.vs-side.me { border-color: var(--accent); }
.vs-name {
  font-family: var(--font-display); font-size: 16.5px; font-weight: 600;
  margin-bottom: 11px; display: flex; align-items: center; gap: 8px;
}
.vs-name em {
  font-style: normal; font-family: var(--font-mono); font-size: 10px;
  letter-spacing: .1em; text-transform: uppercase; color: var(--accent-ink);
  background: var(--accent-soft); border-radius: 999px; padding: 2px 7px;
}
.vs-rows { display: flex; flex-direction: column; gap: 6px; }
.vs-row { display: flex; justify-content: space-between; gap: 12px; font-size: 13.5px; color: var(--ink-2); }
.vs-row b { font-family: var(--font-mono); font-weight: 600; color: var(--ink); font-variant-numeric: tabular-nums; }
.vs-mid { display: grid; place-items: center; font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; color: var(--muted); }

/* ================= карточки модулей ================= */
.mods { display: flex; flex-direction: column; gap: 12px; }
.mod {
  background: var(--surface); border: 1px solid var(--line); border-radius: 12px;
  padding: 20px 22px; display: grid; grid-template-columns: 34px 1fr; gap: 16px;
  transition: border-color .2s;
}
.mod.started { border-color: var(--accent); background: var(--accent-soft); }
.mod-n {
  font-family: var(--font-display); font-size: 15px; font-weight: 600;
  color: var(--muted); padding-top: 5px;
}
.mod.done .mod-n { color: var(--accent); }
.mod.started .mod-n { color: var(--accent); }
.mod h3 { font-family: var(--font-display); font-size: 18.5px; font-weight: 600; margin: 3px 0 4px; }
.mod-sub { color: var(--muted); font-size: 14px; margin: 0 0 14px; }
.mod-stats { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-bottom: 14px; }
.stat { min-width: 132px; }
.stat-k { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.stat-v { font-family: var(--font-mono); font-size: 14px; color: var(--ink); font-variant-numeric: tabular-nums; margin-top: 2px; }
.bar { height: 5px; background: var(--surface-2); border-radius: 3px; overflow: hidden; margin-top: 6px; }
.bar i { display: block; height: 100%; background: var(--accent); border-radius: 3px; }
.bar.amber i { background: var(--signal); }

/* ================= страница теории ================= */
.reading { display: grid; grid-template-columns: 210px 1fr; gap: 44px; align-items: start; }
.toc { position: sticky; top: 78px; }
.toc ol { list-style: none; margin: 10px 0 0; padding: 0; display: flex; flex-direction: column; gap: 3px; }
.toc a {
  display: flex; gap: 8px; font-size: 13.5px; color: var(--ink-2);
  text-decoration: none; padding: 5px 8px; border-radius: 6px; line-height: 1.35;
}
.toc a:hover { background: var(--surface-2); }
.toc a.read { color: var(--muted); }
.toc a i { font-style: normal; font-family: var(--font-mono); font-size: 11px; color: var(--muted); padding-top: 1px; }
.toc a.read i::after { content: "✓"; color: var(--accent); margin-left: 3px; }

.article { min-width: 0; }
.topic { padding: 34px 0 30px; border-bottom: 1px solid var(--line); }
.topic:first-child { padding-top: 12px; }
.topic-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 10px; }
.topic-n {
  font-family: var(--font-mono); font-size: 12px; font-weight: 600;
  color: var(--accent-ink); font-variant-numeric: tabular-nums;
}
.topic h2 {
  font-family: var(--font-display); font-weight: 600; font-size: clamp(21px, 3vw, 27px);
  line-height: 1.2; margin: 0; letter-spacing: -.01em; text-wrap: balance;
}
.topic-lead {
  font-size: 17px; color: var(--ink-2); margin: 0 0 22px;
  max-width: 64ch; border-left: 2px solid var(--accent); padding-left: 14px;
}
.topic h3 {
  font-family: var(--font-display); font-size: 17px; font-weight: 600;
  margin: 28px 0 10px; color: var(--ink);
}
.topic p { max-width: 68ch; margin: 0 0 14px; font-size: 16.5px; line-height: 1.68; color: var(--ink); }
.topic ul, .topic ol { max-width: 68ch; margin: 0 0 16px; padding-left: 22px; font-size: 16.5px; line-height: 1.62; }
.topic li { margin-bottom: 7px; }
.topic code {
  font-family: var(--font-mono); font-size: .88em; background: var(--surface-2);
  padding: 1px 5px; border-radius: 4px;
}
.formula {
  font-family: var(--font-mono); font-size: 15px; line-height: 1.6;
  background: var(--surface); border: 1px solid var(--line); border-left: 3px solid var(--accent);
  border-radius: 6px; padding: 13px 16px; margin: 4px 0 20px;
  overflow-x: auto; white-space: pre-wrap; max-width: 68ch;
}
.example, .pitfall, .takeaway {
  border-radius: 8px; padding: 15px 18px; margin: 22px 0; max-width: 68ch;
}
.example { background: var(--surface); border: 1px solid var(--line); }
.pitfall { background: var(--wrong-soft); border: 1px solid color-mix(in srgb, var(--wrong) 30%, transparent); }
.takeaway { background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent); }
.example p:last-child, .pitfall p:last-child, .takeaway ul { margin-bottom: 0; }
.tag {
  display: inline-block; font-family: var(--font-mono); font-size: 10.5px; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase; margin-bottom: 8px; color: var(--muted);
}
.pitfall .tag { color: var(--wrong); }
.takeaway .tag { color: var(--accent-ink); }
.topic .tbl { border-collapse: collapse; margin: 0 0 20px; font-size: 15px; width: 100%; max-width: 68ch; }
.topic .tbl th, .topic .tbl td { border: 1px solid var(--line); padding: 7px 11px; text-align: left; }
.topic .tbl th { background: var(--surface-2); font-weight: 600; font-size: 13.5px; }
.topic .tbl td { font-variant-numeric: tabular-nums; }
.table-scroll { overflow-x: auto; max-width: 100%; }

.readmark {
  display: inline-flex; align-items: center; gap: 10px; margin-top: 10px;
  font-size: 14px; color: var(--ink-2); cursor: pointer;
  border: 1px solid var(--line-strong); border-radius: 999px; padding: 7px 15px 7px 12px;
}
.readmark:hover { border-color: var(--accent); }
.readmark input {
  appearance: none; -webkit-appearance: none; margin: 0;
  width: 17px; height: 17px; border: 1.5px solid var(--line-strong); border-radius: 5px;
  background: var(--ground); position: relative; cursor: pointer;
}
.readmark input:checked { background: var(--accent); border-color: var(--accent); }
.readmark input:checked::after {
  content: ""; position: absolute; left: 5px; top: 1.5px; width: 4px; height: 9px;
  border: solid var(--on-accent); border-width: 0 2px 2px 0; transform: rotate(43deg);
}
.readmark input:disabled { opacity: .45; cursor: not-allowed; }

.module-foot { margin-top: 40px; display: flex; flex-direction: column; gap: 18px; }
.pager { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

/* ================= тренажёр ================= */
.dots { display: flex; gap: 5px; margin-bottom: 18px; }
.dots i { flex: 1; height: 4px; border-radius: 2px; background: var(--surface-2); }
.dots i.ok { background: var(--accent); }
.dots i.bad { background: var(--wrong); }
.dots i.now { background: var(--line-strong); }
.q-meta {
  display: flex; justify-content: space-between; gap: 12px; margin-bottom: 12px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--muted);
}
.q-text {
  font-family: var(--font-display); font-size: 19px; line-height: 1.4;
  font-weight: 500; margin: 0 0 20px;
}
.opts { display: flex; flex-direction: column; gap: 8px; }
.opt {
  text-align: left; background: var(--surface); border: 1px solid var(--line);
  border-radius: 8px; padding: 12px 15px; font-size: 15px; color: var(--ink);
  display: grid; grid-template-columns: 22px 1fr; gap: 12px; align-items: start;
}
.opt:hover:not(:disabled) { border-color: var(--accent); }
.opt em {
  font-style: normal; font-family: var(--font-mono); font-size: 11.5px; color: var(--muted);
  border: 1px solid var(--line-strong); border-radius: 5px;
  width: 21px; height: 21px; display: grid; place-items: center; margin-top: 1px;
}
.opt.right { border-color: var(--accent); background: var(--accent-soft); }
.opt.right em { border-color: var(--accent); color: var(--accent-ink); }
.opt.chosen-wrong { border-color: var(--wrong); background: var(--wrong-soft); }
.opt.chosen-wrong em { border-color: var(--wrong); color: var(--wrong); }
.opt:disabled { cursor: default; }
.numrow { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.numrow input {
  font-family: var(--font-mono); font-size: 17px; padding: 11px 14px; width: 160px;
  border: 1px solid var(--line-strong); border-radius: 8px;
  background: var(--ground); color: var(--ink);
}
.unit { font-family: var(--font-mono); font-size: 13px; color: var(--muted); }
.verdict { margin-top: 18px; border-left: 2px solid var(--accent); padding: 2px 0 2px 16px; }
.verdict.bad { border-left-color: var(--wrong); }
.verdict h4 {
  font-family: var(--font-mono); font-size: 11px; font-weight: 600; letter-spacing: .12em;
  text-transform: uppercase; margin: 0 0 6px; color: var(--accent-ink);
}
.verdict.bad h4 { color: var(--wrong); }
.verdict p { margin: 0; font-size: 15px; color: var(--ink-2); max-width: 62ch; }
.verdict .ref { margin-top: 8px; font-size: 13.5px; }
.score {
  font-family: var(--font-display); font-size: 42px; font-weight: 700; line-height: 1;
  color: var(--accent-ink); font-variant-numeric: tabular-nums;
}
.score span { font-size: 19px; color: var(--muted); font-weight: 500; }
.review { display: flex; flex-direction: column; gap: 10px; margin: 20px 0 0; }
.rev {
  display: grid; grid-template-columns: 18px 1fr; gap: 12px; font-size: 14.5px;
  color: var(--ink-2); padding-bottom: 10px; border-bottom: 1px solid var(--line);
}
.rev:last-child { border-bottom: 0; }
.rev i { font-style: normal; font-family: var(--font-mono); font-weight: 600; color: var(--accent); }
.rev.bad i { color: var(--wrong); }
.rev b { color: var(--ink); font-weight: 500; display: block; }
.tiles { display: flex; flex-direction: column; gap: 8px; }
.tile {
  width: 100%; text-align: left; background: var(--surface); color: var(--ink);
  border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 18px;
  display: grid; grid-template-columns: 30px 1fr auto; gap: 14px; align-items: center;
}
.tile:hover { border-color: var(--accent); }
.tile-n {
  font-family: var(--font-mono); font-size: 12px; font-weight: 600; color: var(--muted);
  width: 26px; height: 26px; border-radius: 50%; border: 1px solid var(--line-strong);
  display: grid; place-items: center;
}
.tile.solid .tile-n { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.tile-title { display: block; font-size: 15.5px; font-weight: 500; }
.tile-meta { display: block; font-family: var(--font-mono); font-size: 11px; color: var(--muted); margin-top: 3px; }
.tile-score {
  font-family: var(--font-mono); font-size: 13px; color: var(--ink-2);
  text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums;
}
.tile-score span { display: block; font-size: 10.5px; color: var(--muted); }

.foot {
  margin-top: 40px; font-family: var(--font-mono); font-size: 11px;
  color: var(--muted); line-height: 1.7;
}

/* ================= адаптив ================= */
@media (max-width: 860px) {
  .reading { grid-template-columns: 1fr; gap: 20px; }
  .toc { position: static; border-bottom: 1px solid var(--line); padding-bottom: 14px; }
  .versus { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .wrap { padding: 0 14px 70px; }
  .site-in { padding: 9px 14px; gap: 10px; }
  .site-nav { order: 3; width: 100%; }
  .topic p, .topic ul, .topic ol { font-size: 16px; }
  .tile { grid-template-columns: 26px 1fr; }
  .tile-score { grid-column: 2; text-align: left; }
}


/* логотип в шапке */
.site-logo{width:34px;height:34px;border-radius:50%;object-fit:cover;vertical-align:middle;margin-right:10px;border:1px solid var(--line)}
.site-name{display:inline-flex;align-items:center}