:root{
  --ink:#1f2a3d; --ink2:#4a5568; --muted:#7a8496; --bg:#f5f6f9; --card:#fff; --line:#e2e6ee;
  --green:#3f5782; --green2:#e8edf5; --ochre:#caa65a; --ochre2:#faf3e3; --red:#b23a2e; --red2:#fbe9e6;
  --blue:#2e86c8; --blue2:#e6f1fa; --radius:14px;
}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,system-ui,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;font-size:15.5px}
h1,h2,h3{font-family:Fraunces,Georgia,serif;line-height:1.25;color:#2b3e60}
.hero{background:linear-gradient(120deg,#3f5782,#2b3e60);color:#fff;border-radius:18px;padding:26px 30px;margin-bottom:8px;position:relative;overflow:hidden}.hero h1{color:#fff;margin:.1em 0 .3em}.hero .lead{color:#dfe6f2}.hero .crumb{color:var(--ochre)}.hero:after{content:'';position:absolute;right:-30px;bottom:-30px;width:160px;height:160px;border:22px solid rgba(202,166,90,.55);transform:rotate(30deg)}
h1{font-size:2rem;margin:.2em 0 .4em} h2{font-size:1.45rem;margin:1.6em 0 .5em} h3{font-size:1.12rem;margin:1.3em 0 .4em}
a{color:var(--green)}
.app{display:flex;min-height:100vh}
nav.side{width:280px;flex-shrink:0;background:#fff;border-right:1px solid var(--line);color:var(--ink);padding:22px 14px;position:sticky;top:0;height:100vh;overflow-y:auto}
.brand{padding:0 6px 10px;border-bottom:1px solid var(--line);margin-bottom:6px}.brand img{width:100%;display:block}
.brand small{display:block;font-size:.78rem;color:var(--ochre);font-weight:700;letter-spacing:.14em;text-transform:uppercase;margin:6px 0 0 4px}
.navgrp{font-size:.7rem;text-transform:uppercase;letter-spacing:.1em;color:var(--ochre);font-weight:700;margin:20px 10px 6px}
nav.side a{display:flex;align-items:center;gap:10px;color:var(--ink2);text-decoration:none;padding:8px 10px;border-radius:9px;font-size:.92rem}
nav.side a:hover{background:var(--green2)}
nav.side a.on{background:var(--green);color:#fff}
nav.side .dot{width:8px;height:8px;border-radius:50%;background:#cfd6e2;flex-shrink:0}
nav.side .dot.done{background:var(--ochre)}nav.side a.on .dot{background:#fff}
main{flex:1;min-width:0;padding:28px 40px 80px;max-width:1020px}
.topbar{display:flex;gap:10px;align-items:center;margin-bottom:18px}
.search{flex:1;position:relative}
.search input{width:100%;padding:11px 14px 11px 38px;border:1px solid var(--line);border-radius:10px;font:inherit;background:#fff}
.search svg{position:absolute;left:12px;top:12px}
.menu-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px 12px;font:inherit;cursor:pointer}
.crumb{font-size:.8rem;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}
.lead{font-size:1.06rem;color:var(--ink2);max-width:760px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:14px;margin-top:14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
a.card{text-decoration:none;color:inherit;display:block;transition:.15s}
a.card:hover{border-color:var(--green);transform:translateY(-2px)}
.card .tag{display:inline-block;font-size:.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;padding:3px 8px;border-radius:20px;background:var(--green2);color:var(--green)}
.card h3{margin:.5em 0 .3em}
.card p{margin:0;color:var(--ink2);font-size:.92rem}
.bar{height:6px;background:#e7ebf2;border-radius:4px;margin-top:12px;overflow:hidden}
.bar i{display:block;height:100%;background:var(--ochre)}
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin:16px 0;border-bottom:1px solid var(--line);padding-bottom:10px}
.tabs button{border:1px solid var(--line);background:#fff;padding:7px 13px;border-radius:20px;font:inherit;font-size:.88rem;cursor:pointer;color:var(--ink2)}
.tabs button.on{background:var(--green);border-color:var(--green);color:#fff}
.lesson{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:8px 30px 26px}
.lesson ul,.lesson ol{padding-left:22px} .lesson li{margin:4px 0}
.note,.warn,.tip,.law{border-radius:10px;padding:12px 16px;margin:14px 0;font-size:.94rem}
.note{background:var(--blue2);border-left:4px solid var(--blue)}
.warn{background:var(--red2);border-left:4px solid var(--red)}
.tip{background:var(--ochre2);border-left:4px solid var(--ochre)}
.law{background:var(--green2);border-left:4px solid var(--green)}
.note b:first-child,.warn b:first-child,.tip b:first-child,.law b:first-child{display:block;margin-bottom:2px}
table{border-collapse:collapse;width:100%;margin:12px 0;font-size:.9rem;background:#fff}
th,td{border:1px solid var(--line);padding:7px 10px;text-align:left;vertical-align:top}
th{background:#eef1f7;font-weight:600}
.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
.tblwrap{overflow-x:auto}
.entry{border:1px solid var(--line);border-radius:10px;margin:14px 0;overflow:hidden;background:#fff}
.entry .eh{background:#eef1f7;padding:8px 12px;font-weight:600;font-size:.92rem}
.entry table{margin:0} .entry td,.entry th{border-left:0;border-right:0}
.entry .lib{font-size:.85rem;color:var(--ink2);padding:8px 12px;font-style:italic}
.cr{padding-left:28px!important}
.btn{background:var(--green);color:#fff;border:0;padding:10px 18px;border-radius:9px;font:inherit;font-weight:600;cursor:pointer}
.btn.ghost{background:#fff;color:var(--green);border:1px solid var(--green)}
.btn:disabled{opacity:.5;cursor:default}
.quiz .q{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin:12px 0}
.quiz .q p{margin:0 0 10px;font-weight:600}
.quiz label{display:block;padding:8px 12px;border:1px solid var(--line);border-radius:8px;margin:6px 0;cursor:pointer;font-size:.93rem}
.quiz label:hover{background:#faf8f3}
.quiz label.ok{background:#e3f3ea;border-color:#3d9a6b}
.quiz label.ko{background:var(--red2);border-color:var(--red)}
.quiz .expl{display:none;font-size:.88rem;color:var(--ink2);margin-top:8px;padding:8px 12px;background:#faf8f3;border-radius:8px}
.quiz .q.answered .expl{display:block}
.score{font-family:Fraunces,serif;font-size:1.3rem;margin:12px 0}
.form{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px;margin:12px 0}
.form label{font-size:.82rem;color:var(--ink2);font-weight:500}
.form input,.form select{width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:8px;font:inherit;margin-top:4px;background:#fff}
.result{background:var(--green2);border-radius:10px;padding:14px 18px;margin-top:10px}
.result .big{font-family:Fraunces,serif;font-size:1.5rem;color:var(--green)}
.kpis{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:10px}
.kpi{background:#fff;border-radius:10px;padding:10px 14px;border:1px solid var(--line)}
.kpi span{display:block;font-size:.75rem;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.kpi b{font-size:1.15rem;font-variant-numeric:tabular-nums}
.chk{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border:1px solid var(--line);border-radius:9px;margin:6px 0;background:#fff}
.chk input{margin-top:5px}
.chk small{display:block;color:var(--muted)}
.pill{display:inline-block;font-size:.72rem;padding:2px 8px;border-radius:12px;background:#ece8de;margin:2px 3px 0 0}
.hl{background:#fff1c9}
.sr-res{display:block;padding:12px 14px;background:#fff;border:1px solid var(--line);border-radius:10px;margin:8px 0;text-decoration:none;color:inherit}
.sr-res:hover{border-color:var(--green)}
.sr-res small{color:var(--muted)}
.footer-note{font-size:.8rem;color:var(--muted);margin-top:40px;border-top:1px solid var(--line);padding-top:14px}
.navbtns{display:flex;justify-content:space-between;margin-top:22px;gap:10px}
.done-btn{margin-top:16px}
@media (max-width:860px){
  nav.side{position:fixed;left:-290px;z-index:20;transition:.2s;width:280px}
  nav.side.open{left:0;box-shadow:0 0 40px rgba(0,0,0,.4)}
  .menu-btn{display:block}
  main{padding:18px 16px 60px}
  .lesson{padding:4px 16px 20px}
}