/* =========================================================
   Аптека изнутри — стили интерактивного учебника
   ========================================================= */

:root {
  --green: #16a34a;
  --green-d: #15803d;
  --teal: #0d9488;
  --purple: #7c3aed;
  --amber: #d97706;
  --rose: #e11d48;
  --blue: #2563eb;

  --bg: #f4f7f9;
  --bg-soft: #eaf0f3;
  --card: #ffffff;
  --card-2: #f8fafc;
  --ink: #0f172a;
  --ink-soft: #475569;
  --muted: #94a3b8;
  --line: #e2e8f0;
  --code-bg: #0f172a;
  --code-ink: #e2e8f0;
  --shadow: 0 6px 24px rgba(15,23,42,.08);
  --shadow-lg: 0 18px 50px rgba(15,23,42,.16);
  --radius: 16px;
  --grad: linear-gradient(120deg, var(--green), var(--teal));
  --grad-soft: linear-gradient(120deg, #d1fae5, #ccfbf1);
}

[data-theme="dark"] {
  --bg: #0b1220;
  --bg-soft: #0f1a2e;
  --card: #131e33;
  --card-2: #0f1a2e;
  --ink: #e8eef7;
  --ink-soft: #aab7c9;
  --muted: #64748b;
  --line: #24324b;
  --code-bg: #0a1120;
  --code-ink: #d7e3f4;
  --shadow: 0 6px 24px rgba(0,0,0,.4);
  --shadow-lg: 0 18px 50px rgba(0,0,0,.55);
  --grad-soft: linear-gradient(120deg, #0c3b2e, #0b3b39);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- ШАПКА ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 14px;
  padding: 10px 18px;
  background: var(--card);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 2px 10px rgba(15,23,42,.04);
}
.brand { display: flex; align-items: center; gap: 10px; font-size: 1.15rem; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand-logo { font-size: 1.5rem; filter: drop-shadow(0 2px 4px rgba(0,0,0,.2)); }
.brand-text b { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.topbar-search { position: relative; flex: 1; max-width: 460px; }
.topbar-search input {
  width: 100%; padding: 9px 14px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--bg-soft); color: var(--ink);
  font-size: .95rem; outline: none; transition: .2s;
}
.topbar-search input:focus { border-color: var(--teal); background: var(--card); box-shadow: 0 0 0 4px rgba(13,148,136,.12); }
.search-results {
  position: absolute; top: 110%; left: 0; right: 0;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  box-shadow: var(--shadow-lg); overflow: hidden; max-height: 60vh; overflow-y: auto;
}
.search-results a { display: block; padding: 10px 14px; color: var(--ink); border-bottom: 1px solid var(--line); }
.search-results a:hover { background: var(--bg-soft); text-decoration: none; }
.search-results .sr-sec { font-size: .72rem; color: var(--muted); text-transform: uppercase; letter-spacing: .03em; }
.search-results .sr-empty { padding: 14px; color: var(--muted); }
.topbar-actions { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.icon-btn {
  background: var(--bg-soft); border: 1px solid var(--line); color: var(--ink);
  width: 40px; height: 40px; border-radius: 12px; font-size: 1.1rem; cursor: pointer;
  display: grid; place-items: center; transition: .2s;
}
.icon-btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.menu-toggle { display: none; }

.progress-mini { position: relative; width: 40px; height: 40px; display: grid; place-items: center; }
.progress-mini .ring { width: 40px; height: 40px; transform: rotate(-90deg); }
.ring-bg { fill: none; stroke: var(--line); stroke-width: 3; }
.ring-fg { fill: none; stroke: var(--green); stroke-width: 3; stroke-linecap: round;
  stroke-dasharray: 97.4; stroke-dashoffset: 97.4; transition: stroke-dashoffset .6s ease; }
.progress-mini span { position: absolute; font-size: .6rem; font-weight: 700; color: var(--green); }

/* ---------- РАСКЛАДКА ---------- */
.layout { display: flex; align-items: flex-start; max-width: 1400px; margin: 0 auto; }
.sidebar {
  position: sticky; top: 61px; align-self: flex-start;
  width: 312px; flex: none; height: calc(100vh - 61px);
  overflow-y: auto; padding: 18px 12px 40px;
  border-right: 1px solid var(--line); background: var(--card);
}
.sidebar-head { display: flex; align-items: center; justify-content: space-between;
  font-weight: 700; padding: 6px 10px 12px; color: var(--ink-soft); font-size: .92rem; }
.reset-btn { background: none; border: none; cursor: pointer; font-size: 1rem; color: var(--muted); }
.reset-btn:hover { color: var(--rose); transform: rotate(90deg); transition: .3s; }

.toc-sec { margin-bottom: 4px; }
.toc-sec-head {
  display: flex; align-items: center; gap: 8px; width: 100%;
  padding: 9px 10px; border: none; background: none; cursor: pointer;
  color: var(--ink); font-size: .9rem; font-weight: 600; text-align: left; border-radius: 10px;
}
.toc-sec-head:hover { background: var(--bg-soft); }
.toc-sec-head .chev { margin-left: auto; transition: .2s; color: var(--muted); font-size: .8rem; }
.toc-sec.open .chev { transform: rotate(90deg); }
.toc-sec-emoji { font-size: 1.05rem; }
.toc-sec-bar { height: 3px; border-radius: 2px; background: var(--line); margin: 2px 10px 0; overflow: hidden; }
.toc-sec-bar i { display: block; height: 100%; background: var(--grad); width: 0; transition: width .5s; }
.toc-lessons { display: none; padding: 4px 0 8px; }
.toc-sec.open .toc-lessons { display: block; }
.toc-lessons a {
  display: flex; align-items: center; gap: 8px; padding: 7px 10px 7px 30px;
  color: var(--ink-soft); font-size: .86rem; border-radius: 8px; position: relative;
}
.toc-lessons a:hover { background: var(--bg-soft); color: var(--ink); text-decoration: none; }
.toc-lessons a.active { background: var(--grad-soft); color: var(--ink); font-weight: 600; }
.toc-lessons a .dot { width: 16px; height: 16px; flex: none; border-radius: 50%;
  border: 2px solid var(--line); display: grid; place-items: center; font-size: .6rem; }
.toc-lessons a.done .dot { background: var(--green); border-color: var(--green); color: #fff; }
.exam-link { display: block; margin: 14px 10px 0; padding: 12px; text-align: center;
  border-radius: 12px; background: var(--grad); color: #fff; font-weight: 700; }
.exam-link:hover { text-decoration: none; opacity: .94; }

.scrim { display: none; }

/* ---------- КОНТЕНТ ---------- */
.content { flex: 1; min-width: 0; padding: 30px clamp(16px, 4vw, 54px) 80px; }

/* Главная */
.hero {
  background: var(--grad); color: #fff; border-radius: 24px;
  padding: clamp(26px, 5vw, 54px); box-shadow: var(--shadow-lg); position: relative; overflow: hidden;
}
.hero::after { content: "💊"; position: absolute; right: -10px; bottom: -30px; font-size: 200px; opacity: .12; transform: rotate(-15deg); }
.hero h1 { margin: 0 0 10px; font-size: clamp(1.7rem, 4vw, 2.7rem); line-height: 1.15; }
.hero p { margin: 0 0 8px; font-size: clamp(1rem, 2vw, 1.18rem); opacity: .95; max-width: 720px; }
.hero .hero-cta { margin-top: 22px; display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 12px;
  font-weight: 700; font-size: .98rem; cursor: pointer; border: none; transition: .2s; text-decoration: none;
}
.btn-light { background: #fff; color: var(--green-d); }
.btn-light:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); text-decoration: none; }
.btn-ghost { background: rgba(255,255,255,.18); color: #fff; border: 1px solid rgba(255,255,255,.35); }
.btn-ghost:hover { background: rgba(255,255,255,.28); text-decoration: none; }

.home-stats { display: flex; gap: 14px; flex-wrap: wrap; margin: 26px 0 8px; }
.stat { flex: 1; min-width: 150px; background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.stat .num { font-size: 1.8rem; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat .lbl { color: var(--ink-soft); font-size: .9rem; }

.home-h2 { margin: 36px 0 16px; font-size: 1.4rem; display: flex; align-items: center; gap: 10px; }
.roadmap { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.road-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px; box-shadow: var(--shadow); cursor: pointer; transition: .2s; position: relative; overflow: hidden;
}
.road-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--teal); }
.road-card .rc-top { display: flex; align-items: center; gap: 12px; }
.road-card .rc-emoji { font-size: 1.9rem; }
.road-card .rc-num { font-size: .72rem; font-weight: 700; color: var(--muted); letter-spacing: .04em; }
.road-card h3 { margin: 2px 0 0; font-size: 1.05rem; }
.road-card .rc-count { color: var(--ink-soft); font-size: .85rem; margin-top: 10px; }
.road-card .rc-bar { height: 6px; border-radius: 3px; background: var(--bg-soft); margin-top: 10px; overflow: hidden; }
.road-card .rc-bar i { display: block; height: 100%; background: var(--grad); width: 0; transition: width .6s; }

/* Урок */
.lesson { max-width: 860px; margin: 0 auto; animation: fade .35s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.crumbs { color: var(--muted); font-size: .85rem; margin-bottom: 10px; }
.crumbs a { color: var(--muted); }
.lesson-head { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 6px; }
.lesson-head .l-emoji { font-size: 2.6rem; line-height: 1; }
.lesson-head h1 { margin: 0; font-size: clamp(1.5rem, 3.4vw, 2.1rem); line-height: 1.2; }
.badges { display: flex; gap: 8px; flex-wrap: wrap; margin: 10px 0 22px; }
.badge { font-size: .76rem; font-weight: 700; padding: 4px 12px; border-radius: 999px; letter-spacing: .02em; }
.badge.lvl-база { background: #dcfce7; color: #166534; }
.badge.lvl-средний { background: #fef3c7; color: #92400e; }
.badge.lvl-глубокий { background: #fae8ff; color: #86198f; }
[data-theme="dark"] .badge.lvl-база { background: #0c3b2e; color: #6ee7b7; }
[data-theme="dark"] .badge.lvl-средний { background: #3b2e0c; color: #fcd34d; }
[data-theme="dark"] .badge.lvl-глубокий { background: #3b0c3a; color: #f0abfc; }
.badge.sec { background: var(--bg-soft); color: var(--ink-soft); }

/* блоки урока */
.block { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 22px; margin: 16px 0; box-shadow: var(--shadow); }
.block-label { display: inline-flex; align-items: center; gap: 8px; font-size: .78rem; font-weight: 800;
  text-transform: uppercase; letter-spacing: .05em; margin-bottom: 8px; }
.hook { background: var(--grad-soft); border: none; font-size: 1.12rem; }
[data-theme="dark"] .hook { color: var(--ink); }
.block.history { border-left: 4px solid var(--purple); }
.block.history .block-label { color: var(--purple); }
.block.how .block-label { color: var(--teal); }
.block .md p { margin: 0 0 10px; }
.block .md p:last-child { margin-bottom: 0; }
.block .md ul, .block .md ol { margin: 6px 0 10px; padding-left: 22px; }
.block .md li { margin: 4px 0; }
.block .md code { background: var(--bg-soft); padding: 2px 6px; border-radius: 6px; font-size: .9em;
  font-family: "JetBrains Mono", "Consolas", monospace; color: var(--rose); }
[data-theme="dark"] .block .md code { color: #fca5a5; }
.block .md h3 { margin: 14px 0 6px; font-size: 1.08rem; }
.block .md strong { color: var(--ink); }

/* код-рефы */
.coderef { margin: 16px 0; border-radius: 14px; overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow); }
.coderef-head { display: flex; align-items: center; gap: 8px; padding: 9px 14px; background: var(--card-2);
  font-family: "Consolas", monospace; font-size: .82rem; color: var(--ink-soft); border-bottom: 1px solid var(--line); }
.coderef-head .file { color: var(--teal); font-weight: 700; }
.coderef-head .lines { margin-left: auto; color: var(--muted); }
.coderef pre { margin: 0; padding: 16px; background: var(--code-bg); color: var(--code-ink);
  overflow-x: auto; font-family: "JetBrains Mono", "Consolas", monospace; font-size: .84rem; line-height: 1.55; }
.coderef-note { padding: 10px 14px; background: var(--card-2); font-size: .86rem; color: var(--ink-soft); border-top: 1px solid var(--line); }
.coderef-note::before { content: "💡 "; }
/* подсветка синтаксиса */
.tok-kw { color: #f472b6; }
.tok-str { color: #86efac; }
.tok-com { color: #64748b; font-style: italic; }
.tok-num { color: #fbbf24; }
.tok-var { color: #7dd3fc; }
.tok-fn { color: #c4b5fd; }

/* диаграмма */
.diagram { background: var(--code-bg); color: var(--code-ink); border-radius: 14px; padding: 18px;
  overflow-x: auto; font-family: "JetBrains Mono", "Consolas", monospace; font-size: .82rem; line-height: 1.5;
  box-shadow: var(--shadow); white-space: pre; }

/* справка + мем */
.cards-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 16px 0; }
.ref-card { background: linear-gradient(160deg, var(--card), var(--card-2)); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.ref-card .rc-term { font-weight: 800; font-size: 1.05rem; display: flex; align-items: center; gap: 8px; }
.ref-card .rc-what { margin: 8px 0; color: var(--ink); }
.ref-card .rc-for { font-size: .9rem; color: var(--ink-soft); }
.ref-card .rc-for b { color: var(--teal); }
.meme-card { border: 2px dashed var(--amber); border-radius: var(--radius); padding: 18px;
  background: repeating-linear-gradient(45deg, transparent, transparent 12px, rgba(217,119,6,.04) 12px, rgba(217,119,6,.04) 24px);
  display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; gap: 10px; }
.meme-card .m-emoji { font-size: 3.2rem; }
.meme-card .m-cap { font-weight: 700; font-style: italic; }

/* квиз */
.quiz { border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; margin: 16px 0;
  background: var(--card); box-shadow: var(--shadow); }
.quiz-label { font-size: .78rem; font-weight: 800; text-transform: uppercase; letter-spacing: .05em; color: var(--amber); margin-bottom: 6px; }
.quiz-q { font-weight: 700; font-size: 1.08rem; margin: 6px 0 14px; }
.quiz-opts { display: flex; flex-direction: column; gap: 10px; }
.quiz-opt { display: flex; align-items: center; gap: 12px; padding: 13px 16px; border-radius: 12px;
  border: 1.5px solid var(--line); background: var(--card-2); cursor: pointer; transition: .15s; font-size: .97rem; }
.quiz-opt:hover:not(.locked) { border-color: var(--teal); transform: translateX(3px); }
.quiz-opt .opt-letter { width: 26px; height: 26px; flex: none; border-radius: 8px; background: var(--bg-soft);
  display: grid; place-items: center; font-weight: 700; font-size: .85rem; }
.quiz-opt.correct { border-color: var(--green); background: rgba(22,163,74,.10); }
.quiz-opt.correct .opt-letter { background: var(--green); color: #fff; }
.quiz-opt.wrong { border-color: var(--rose); background: rgba(225,29,72,.08); }
.quiz-opt.wrong .opt-letter { background: var(--rose); color: #fff; }
.quiz-opt.locked { cursor: default; }
.quiz-explain { margin-top: 14px; padding: 13px 16px; border-radius: 12px; background: var(--bg-soft);
  font-size: .92rem; display: none; border-left: 3px solid var(--teal); }
.quiz-explain.show { display: block; animation: fade .3s; }
.quiz-explain.ok { border-left-color: var(--green); }
.quiz-explain.no { border-left-color: var(--rose); }
.quiz-progress { font-size: .8rem; color: var(--muted); margin-bottom: 8px; }

/* takeaway */
.takeaway { display: flex; gap: 14px; align-items: center; background: var(--grad); color: #fff;
  border-radius: var(--radius); padding: 18px 22px; margin: 22px 0; box-shadow: var(--shadow-lg); }
.takeaway .t-emoji { font-size: 1.8rem; }
.takeaway b { display: block; font-size: .76rem; text-transform: uppercase; letter-spacing: .05em; opacity: .85; }

/* навигация урока */
.lesson-nav { display: flex; gap: 12px; margin-top: 30px; }
.nav-card { flex: 1; display: flex; flex-direction: column; gap: 2px; padding: 14px 18px; border-radius: 14px;
  border: 1px solid var(--line); background: var(--card); box-shadow: var(--shadow); transition: .2s; }
.nav-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); border-color: var(--teal); text-decoration: none; }
.nav-card.next { text-align: right; }
.nav-card .nc-dir { font-size: .76rem; color: var(--muted); }
.nav-card .nc-title { font-weight: 700; color: var(--ink); }
.nav-card.disabled { opacity: .35; pointer-events: none; }
.complete-bar { display: flex; align-items: center; justify-content: center; margin: 24px 0 6px; }
.complete-btn { background: var(--card); border: 2px solid var(--green); color: var(--green-d);
  padding: 12px 26px; border-radius: 999px; font-weight: 700; cursor: pointer; transition: .2s; font-size: .96rem; }
.complete-btn:hover { background: var(--green); color: #fff; }
.complete-btn.done { background: var(--green); color: #fff; }
[data-theme="dark"] .complete-btn { color: #6ee7b7; }

/* экзамен */
.exam-intro { text-align: center; padding: 30px 0; }
.exam-result { text-align: center; padding: 30px; border-radius: var(--radius); background: var(--card);
  border: 1px solid var(--line); box-shadow: var(--shadow-lg); }
.exam-result .score { font-size: 3rem; font-weight: 800; }
.exam-q { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; margin: 14px 0; box-shadow: var(--shadow); }
.exam-q .eq-src { font-size: .78rem; color: var(--muted); margin-top: 10px; }

/* footer note */
.foot-note { text-align: center; color: var(--muted); font-size: .85rem; margin: 50px auto 0; max-width: 860px; }

/* мобилки */
@media (max-width: 920px) {
  .menu-toggle { display: grid; }
  .sidebar { position: fixed; left: 0; top: 61px; z-index: 40; transform: translateX(-100%);
    transition: transform .25s ease; width: 290px; box-shadow: var(--shadow-lg); }
  .sidebar.open { transform: none; }
  .scrim.show { display: block; position: fixed; inset: 61px 0 0 0; background: rgba(0,0,0,.4); z-index: 35; }
  .cards-2 { grid-template-columns: 1fr; }
  .topbar-search { max-width: none; }
  .brand-text { display: none; }
}
@media (max-width: 560px) {
  .lesson-nav { flex-direction: column; }
  .home-stats .stat { min-width: 120px; }
}