:root{
  --espresso:#2c1a10;
  --coffee:#3b2417;
  --caramel:#b5742e;
  --caramel-d:#9a5f22;
  --crema:#e8c79a;
  --cream:#f7f1e8;
  --cream-2:#fdf9f2;
  --ink:#2a2018;
  --muted:#8a7a68;
  --line:#e7dccb;
  --green:#3f7d52;
  --red:#c0492f;
  --amber:#c98a1b;
  --blue:#3a6ea5;
  --radius:16px;
  --shadow:0 6px 22px rgba(59,36,23,.10);
  --shadow-sm:0 2px 8px rgba(59,36,23,.08);
  --maxw:980px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:'Segoe UI',system-ui,-apple-system,Roboto,Arial,sans-serif;
  background:var(--cream);
  color:var(--ink);
  line-height:1.55;
  min-height:100vh;
  display:flex;flex-direction:column;
}
a{color:inherit;text-decoration:none}
[hidden]{display:none !important}
.muted{color:var(--muted)}
small{font-size:.78em}

/* ---------- topbar ---------- */
.topbar{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;gap:16px;
  padding:10px 18px;
  background:linear-gradient(120deg,var(--coffee),var(--espresso));
  color:var(--cream);
  box-shadow:0 4px 18px rgba(0,0,0,.18);
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-logo{font-size:26px;line-height:1}
.brand-text{display:flex;flex-direction:column;font-weight:800;letter-spacing:.5px;font-size:18px}
.brand-text small{font-weight:500;opacity:.7;letter-spacing:.2px}
.search{position:relative;flex:1 1 auto;max-width:520px;margin:0 auto}
.search input{
  width:100%;padding:9px 14px;border-radius:999px;border:none;
  background:rgba(255,255,255,.14);color:var(--cream);font-size:14px;outline:none;
}
.search input::placeholder{color:rgba(255,255,255,.6)}
.search input:focus{background:rgba(255,255,255,.22)}
.search-results{
  position:absolute;top:46px;left:0;right:0;background:var(--cream-2);
  border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);
  overflow:hidden;max-height:60vh;overflow-y:auto;color:var(--ink);
}
.search-results a{display:block;padding:10px 14px;border-bottom:1px solid var(--line)}
.search-results a:last-child{border-bottom:none}
.search-results a:hover{background:var(--cream)}
.search-results .sr-kind{font-size:11px;text-transform:uppercase;letter-spacing:.5px;color:var(--caramel-d);font-weight:700}
.topnav{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.nav-link{
  padding:8px 14px;border-radius:999px;font-weight:700;font-size:14px;white-space:nowrap;
  background:rgba(255,255,255,.12);color:var(--cream);transition:background .15s;
}
.nav-link:hover{background:rgba(255,255,255,.22)}
.exam-link{background:var(--caramel);color:#fff}
.exam-link:hover{background:var(--caramel-d)}

/* ---------- layout ---------- */
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:22px 18px 60px;flex:1 0 auto}
.loader{padding:60px 0;text-align:center;color:var(--muted)}
.footer{
  text-align:center;padding:18px;font-size:13px;color:var(--muted);
  display:flex;flex-direction:column;gap:2px;border-top:1px solid var(--line);background:var(--cream-2);
}

/* ---------- breadcrumb / back ---------- */
.crumbs{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--muted);margin-bottom:14px}
.crumbs a:hover{color:var(--caramel-d)}
.crumbs .sep{opacity:.5}

/* ---------- hero ---------- */
.hero{
  background:linear-gradient(125deg,var(--coffee),var(--caramel-d));
  color:var(--cream);border-radius:var(--radius);padding:26px 26px 24px;margin-bottom:22px;
  box-shadow:var(--shadow);position:relative;overflow:hidden;
}
.hero h1{margin:0 0 6px;font-size:26px}
.hero p{margin:0;opacity:.85;max-width:640px}
.hero-stats{display:flex;flex-wrap:wrap;gap:18px;margin-top:18px}
.hero-stat{display:flex;flex-direction:column}
.hero-stat b{font-size:22px}
.hero-stat span{font-size:12px;opacity:.8;text-transform:uppercase;letter-spacing:.4px}

/* progress bar */
.progress-wrap{margin-top:18px}
.progress-bar{height:10px;border-radius:999px;background:rgba(255,255,255,.22);overflow:hidden}
.progress-bar > i{display:block;height:100%;background:var(--crema);border-radius:999px;transition:width .4s}
.progress-label{font-size:13px;margin-top:6px;opacity:.9}

/* ---------- section headings ---------- */
.section-title{font-size:15px;text-transform:uppercase;letter-spacing:1px;color:var(--caramel-d);margin:26px 2px 12px;font-weight:800}

/* ---------- category grid ---------- */
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}
.card{
  background:var(--cream-2);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px;box-shadow:var(--shadow-sm);transition:transform .15s,box-shadow .15s;
  display:flex;flex-direction:column;gap:8px;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.cat-card .cat-icon{font-size:30px}
.cat-card h3{margin:2px 0 0;font-size:18px}
.cat-card p{margin:0;font-size:13.5px;color:var(--muted);flex:1}
.cat-meta{display:flex;align-items:center;justify-content:space-between;margin-top:6px}
.pill{
  font-size:12px;font-weight:700;padding:3px 10px;border-radius:999px;
  background:var(--cream);border:1px solid var(--line);color:var(--coffee);
}
.pill.done{background:#e7f3ea;border-color:#bfe0c8;color:var(--green)}
.mini-progress{height:6px;border-radius:999px;background:var(--line);overflow:hidden;margin-top:4px}
.mini-progress > i{display:block;height:100%;background:var(--caramel);border-radius:999px}

/* ---------- lesson list ---------- */
.lesson-list{display:flex;flex-direction:column;gap:10px}
.lesson-row{
  display:flex;align-items:center;gap:14px;background:var(--cream-2);border:1px solid var(--line);
  border-radius:14px;padding:14px 16px;box-shadow:var(--shadow-sm);transition:transform .12s;
}
.lesson-row:hover{transform:translateX(3px)}
.lesson-row .lr-check{
  width:30px;height:30px;border-radius:50%;flex:0 0 auto;display:grid;place-items:center;
  border:2px solid var(--line);color:var(--muted);font-size:15px;font-weight:800;
}
.lesson-row.done .lr-check{background:var(--green);border-color:var(--green);color:#fff}
.lesson-row .lr-body{flex:1;min-width:0}
.lesson-row .lr-body h4{margin:0;font-size:16px}
.lesson-row .lr-body p{margin:2px 0 0;font-size:13px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lesson-row .lr-meta{font-size:12px;color:var(--muted);flex:0 0 auto;text-align:right}
.lesson-row .lr-arrow{color:var(--caramel);font-size:20px;flex:0 0 auto}

/* ---------- lesson content blocks ---------- */
.lesson-head h1{margin:.2em 0 .1em;font-size:26px}
.lesson-head .summary{color:var(--muted);margin:0 0 6px}
.content{margin-top:10px}
.content h2{font-size:19px;margin:24px 0 8px;color:var(--coffee);border-left:4px solid var(--caramel);padding-left:10px}
.content p{margin:8px 0}
.content ul.bullets{margin:8px 0;padding-left:4px;list-style:none;display:flex;flex-direction:column;gap:6px}
.content ul.bullets li{position:relative;padding-left:22px}
.content ul.bullets li::before{content:"•";position:absolute;left:6px;color:var(--caramel);font-weight:900}
.content ol.steps{margin:10px 0;padding:0;list-style:none;counter-reset:s;display:flex;flex-direction:column;gap:8px}
.content ol.steps li{position:relative;padding:8px 12px 8px 44px;background:var(--cream-2);border:1px solid var(--line);border-radius:10px;counter-increment:s}
.content ol.steps li::before{
  content:counter(s);position:absolute;left:10px;top:8px;width:24px;height:24px;border-radius:50%;
  background:var(--caramel);color:#fff;display:grid;place-items:center;font-weight:800;font-size:13px;
}
.kv{display:flex;flex-direction:column;gap:0;border:1px solid var(--line);border-radius:12px;overflow:hidden;margin:10px 0}
.kv .kv-row{display:flex;gap:12px;padding:9px 14px;border-bottom:1px solid var(--line);background:var(--cream-2)}
.kv .kv-row:last-child{border-bottom:none}
.kv .kv-k{flex:1;font-weight:600}
.kv .kv-v{flex:0 0 auto;color:var(--caramel-d);font-weight:700;text-align:right}
.callout{display:flex;gap:12px;padding:13px 16px;border-radius:12px;margin:12px 0;border:1px solid;align-items:flex-start}
.callout .ic{font-size:18px;line-height:1.3}
.callout .ct strong{display:block;margin-bottom:2px}
.callout.info{background:#eef4fb;border-color:#c8dcf0;color:#284b6e}
.callout.warning{background:#fef6e6;border-color:#f3dca6;color:#8a5e0c}
.callout.danger{background:#fdecea;border-color:#f3c2ba;color:#962a17}
.callout.success{background:#eaf6ee;border-color:#c0e3cb;color:#256138}

/* tables */
.table-wrap{overflow-x:auto;margin:12px 0}
table.data{width:100%;border-collapse:collapse;font-size:14px;background:var(--cream-2);border-radius:12px;overflow:hidden}
table.data th,table.data td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line);vertical-align:top}
table.data th{background:var(--coffee);color:var(--cream);font-weight:700;font-size:13px}
table.data tr:last-child td{border-bottom:none}
table.data tr:nth-child(even) td{background:var(--cream)}

/* recipe cards */
.recipes{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));margin:12px 0}
.recipe{background:var(--cream-2);border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:var(--shadow-sm);display:flex;flex-direction:column}
.recipe .r-head{background:linear-gradient(120deg,var(--coffee),var(--caramel-d));color:var(--cream);padding:12px 15px}
.recipe .r-head h3{margin:0;font-size:17px}
.recipe .r-head .r-sub{font-size:12px;opacity:.8}
.recipe .r-body{padding:13px 15px;display:flex;flex-direction:column;gap:10px}
.recipe .r-serving{font-size:12.5px;color:var(--muted)}
table.ing{width:100%;border-collapse:collapse;font-size:13.5px}
table.ing th,table.ing td{padding:5px 7px;border-bottom:1px solid var(--line);text-align:right}
table.ing th:first-child,table.ing td:first-child{text-align:left}
table.ing thead th{color:var(--caramel-d);font-size:12px;border-bottom:2px solid var(--line)}
table.ing tr.out td{font-weight:800;border-top:2px solid var(--line);background:var(--cream)}
.r-steps h5{margin:4px 0;font-size:13px;color:var(--caramel-d);text-transform:uppercase;letter-spacing:.4px}
.r-steps ol{margin:4px 0;padding-left:20px;font-size:13.5px;display:flex;flex-direction:column;gap:3px}

/* recipe tips */
.r-tips{background:var(--cream);border-radius:8px;padding:8px 10px;border-left:3px solid var(--green)}
.r-tips h5{margin:0 0 4px;font-size:12px;color:var(--green);text-transform:uppercase;letter-spacing:.4px}
.r-tips ul{margin:0;padding-left:18px;font-size:13px;display:flex;flex-direction:column;gap:3px}

/* ---------- reference (справочник) ---------- */
.ref-hero{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px}
.ref-quick{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.ref-quick a{
  font-size:13px;font-weight:600;padding:7px 12px;border-radius:999px;
  background:rgba(255,255,255,.14);color:var(--cream);border:1px solid rgba(255,255,255,.18);
}
.ref-quick a:hover{background:rgba(255,255,255,.26)}
.ref-toolbar{
  position:sticky;top:60px;z-index:30;background:var(--cream);
  padding:12px 0 10px;margin-bottom:6px;border-bottom:1px solid var(--line);
}
.ref-search{width:100%;padding:11px 16px;border-radius:12px;border:2px solid var(--line);
  background:var(--cream-2);font-size:15px;outline:none}
.ref-search:focus{border-color:var(--caramel)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.chip{
  cursor:pointer;font-size:13px;font-weight:700;padding:6px 13px;border-radius:999px;
  background:var(--cream-2);border:1px solid var(--line);color:var(--coffee);transition:all .12s;
}
.chip:hover{border-color:var(--crema)}
.chip.active{background:var(--coffee);color:var(--cream);border-color:var(--coffee)}
.chip .c-count{opacity:.6;font-weight:600}
.ref-group{margin-top:18px}
.ref-group-title{display:flex;align-items:center;gap:8px;font-size:18px;font-weight:800;color:var(--coffee);margin:6px 2px 10px}
.ref-empty{padding:40px;text-align:center;color:var(--muted)}
.recipe.flash{animation:flash 1.4s ease-out}
@keyframes flash{0%{box-shadow:0 0 0 3px var(--caramel)}100%{box-shadow:var(--shadow-sm)}}
.recipe{scroll-margin-top:140px}

/* ---------- drill (тренажёр) ---------- */
.drill-scopes{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));margin-top:6px}
.scope-card{
  cursor:pointer;text-align:left;background:var(--cream-2);border:1px solid var(--line);
  border-radius:14px;padding:16px;box-shadow:var(--shadow-sm);transition:transform .12s,box-shadow .12s;
  display:flex;flex-direction:column;gap:6px;
}
.scope-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.scope-card .s-icon{font-size:26px}
.scope-card h3{margin:0;font-size:17px}
.scope-card .s-count{font-size:13px;color:var(--muted)}
.scope-card.all{background:linear-gradient(120deg,var(--coffee),var(--caramel-d));color:var(--cream);border:none}
.scope-card.all .s-count{color:rgba(255,255,255,.8)}

.drill-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:6px}
.drill-top .d-count{font-weight:700}
.drill-top .d-score{font-weight:800;color:var(--green)}
.drill-progress{height:8px;border-radius:999px;background:var(--line);overflow:hidden;margin-bottom:16px}
.drill-progress > i{display:block;height:100%;background:var(--caramel);border-radius:999px;transition:width .3s}
.drill-card{background:var(--cream-2);border:1px solid var(--line);border-radius:16px;padding:20px;box-shadow:var(--shadow-sm)}
.kind-badge{
  display:inline-block;font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.6px;
  padding:4px 10px;border-radius:999px;margin-bottom:10px;
}
.kind-badge.composition{background:#eef4fb;color:#2a5b8a}
.kind-badge.odd{background:#fdecea;color:#a23320}
.kind-badge.proportion{background:#fff2dd;color:#9a5f22}
.kind-badge.sequence{background:#eaf6ee;color:#2c6b41}
.drill-card .d-recipe{font-size:13px;color:var(--muted);font-weight:600}
.drill-card .d-prompt{font-size:19px;font-weight:700;margin:4px 0 14px}
.drill-opts{display:flex;flex-direction:column;gap:10px}
.drill-opt{
  display:flex;align-items:center;gap:12px;padding:13px 15px;border:2px solid var(--line);
  border-radius:12px;cursor:pointer;background:#fff;font-size:15px;text-align:left;transition:border-color .1s,background .1s;
}
.drill-opt:hover{border-color:var(--crema)}
.drill-opt .d-key{
  flex:0 0 auto;width:24px;height:24px;border-radius:7px;display:grid;place-items:center;
  font-size:13px;font-weight:800;background:var(--cream);border:1px solid var(--line);color:var(--muted);
}
.drill-opt.sel{border-color:var(--caramel);background:#fff7ec}
.drill-opt.sel .d-key{background:var(--caramel);color:#fff;border-color:var(--caramel)}
.drill-opt.correct{border-color:var(--green);background:#eaf6ee}
.drill-opt.correct .d-key{background:var(--green);color:#fff;border-color:var(--green)}
.drill-opt.wrong{border-color:var(--red);background:#fdecea}
.drill-opt.wrong .d-key{background:var(--red);color:#fff;border-color:var(--red)}
.drill-opt.locked{cursor:default}
.drill-actions{display:flex;gap:10px;margin-top:16px;align-items:center;flex-wrap:wrap}
.drill-actions .hintkeys{font-size:12px;color:var(--muted);margin-left:auto}
.verdict-line{font-weight:800;font-size:14px}
.verdict-line.ok{color:var(--green)}
.verdict-line.no{color:var(--red)}

/* prep cards */
.prep{display:flex;flex-direction:column;gap:12px;margin:12px 0}
.prep .p-item{background:var(--cream-2);border:1px solid var(--line);border-radius:12px;padding:14px}
.prep .p-item h4{margin:0 0 6px}
.prep .req{font-size:11px;font-weight:800;color:var(--red);text-transform:uppercase;letter-spacing:.5px}

/* notes terms */
.terms{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));margin:10px 0}
.terms .t-group{background:var(--cream-2);border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.terms .t-group h4{margin:0 0 8px;font-size:14px;color:var(--caramel-d)}
.terms .t-row{display:flex;justify-content:space-between;gap:10px;font-size:13.5px;padding:3px 0;border-bottom:1px dashed var(--line)}
.terms .t-row:last-child{border-bottom:none}
.terms .t-row b{color:var(--coffee)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;justify-content:center;cursor:pointer;
  padding:11px 20px;border-radius:12px;font-weight:700;font-size:15px;border:none;
  background:var(--caramel);color:#fff;transition:background .15s,transform .1s;
}
.btn:hover{background:var(--caramel-d)}
.btn:active{transform:translateY(1px)}
.btn.ghost{background:transparent;color:var(--coffee);border:2px solid var(--line)}
.btn.ghost:hover{border-color:var(--caramel);color:var(--caramel-d)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}

/* ---------- quiz ---------- */
.quiz{margin-top:26px;border-top:2px dashed var(--line);padding-top:20px}
.quiz h2{font-size:21px;margin:0 0 4px}
.q{background:var(--cream-2);border:1px solid var(--line);border-radius:14px;padding:16px;margin:14px 0}
.q .q-prompt{font-weight:700;margin-bottom:4px}
.q .q-hint{font-size:12px;color:var(--muted);margin-bottom:10px}
.opts{display:flex;flex-direction:column;gap:8px}
.opt{
  display:flex;align-items:center;gap:10px;padding:10px 13px;border:2px solid var(--line);
  border-radius:10px;cursor:pointer;background:#fff;transition:border-color .12s,background .12s;
}
.opt:hover{border-color:var(--crema)}
.opt input{accent-color:var(--caramel);width:18px;height:18px;flex:0 0 auto}
.opt.correct{border-color:var(--green);background:#eaf6ee}
.opt.wrong{border-color:var(--red);background:#fdecea}
.opt.miss{border-color:var(--green);background:#f3faf5;border-style:dashed}
.q.graded .opt{cursor:default}
.q-explain{margin-top:10px;font-size:13.5px;padding:9px 12px;border-radius:8px;background:var(--cream);border-left:3px solid var(--caramel)}
.q-verdict{font-weight:800;font-size:13px;margin-top:8px}
.q-verdict.ok{color:var(--green)}
.q-verdict.no{color:var(--red)}

/* result banner */
.result{border-radius:16px;padding:22px;margin:18px 0;text-align:center;box-shadow:var(--shadow-sm);border:1px solid var(--line)}
.result.pass{background:#eaf6ee;border-color:#bfe0c8}
.result.fail{background:#fdecea;border-color:#f3c2ba}
.result .r-score{font-size:42px;font-weight:900;line-height:1}
.result .r-sub{margin-top:6px;font-weight:600}
.result.pass .r-score{color:var(--green)}
.result.fail .r-score{color:var(--red)}

/* empty / 404 */
.notice{text-align:center;padding:50px 20px;color:var(--muted)}

@media (max-width:640px){
  .topbar{flex-wrap:wrap;gap:10px;padding:10px 12px}
  .search{order:3;flex-basis:100%;max-width:none}
  .brand-text small{display:none}
  .hero h1{font-size:22px}
  .container{padding:16px 12px 50px}
}