:root{--g:#163A32;--g2:#2F8F6B;--mint:#EAF5EF;--ink:#1F2A37;--mute:#5b6773;--line:#DDE5E1;--gold:#E9B44C;--red:#C2410C;--bg:#F7FAF8}
*{box-sizing:border-box}html{font-size:16px}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
a{color:var(--g2)}h1,h2,h3{font-family:Lora,Georgia,serif;color:var(--g);line-height:1.25}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;padding:8px;z-index:99}
:focus-visible{outline:3px solid var(--gold);outline-offset:2px}
button,.btn{font:inherit;cursor:pointer;border:0;border-radius:10px;padding:.65rem 1.1rem;background:var(--g);color:#fff;font-weight:600;text-decoration:none;display:inline-block}
.btn.alt,button.alt{background:#fff;color:var(--g);border:2px solid var(--g)}button:disabled{opacity:.5;cursor:not-allowed}
/* player layout */
.top{display:flex;align-items:center;gap:12px;background:var(--g);color:#fff;padding:.6rem 1rem;position:sticky;top:0;z-index:20}
.top .brand{font-weight:800;letter-spacing:.02em}.top .brand small{display:block;font-weight:400;font-size:.72rem;color:#9FE0C3}
.top .grow{flex:1}.top .pbar{width:160px;height:8px;background:#ffffff33;border-radius:9px;overflow:hidden}.top .pbar i{display:block;height:100%;background:var(--gold);width:0;transition:width .4s}
.top .ptxt{font-size:.8rem}.menu{display:none;background:#ffffff22}
.layout{display:grid;grid-template-columns:300px 1fr;min-height:calc(100vh - 52px)}
nav.side{background:#fff;border-right:1px solid var(--line);padding:1rem .75rem 3rem;overflow:auto;max-height:calc(100vh - 52px);position:sticky;top:52px}
.side h2{font-size:.72rem;text-transform:uppercase;letter-spacing:.12em;color:var(--mute);font-family:inherit;margin:1rem .5rem .3rem}
.side details{border-radius:10px;margin:.2rem 0}.side summary{cursor:pointer;padding:.5rem;font-weight:700;color:var(--g);font-size:.92rem;list-style:none;display:flex;gap:.5rem;align-items:flex-start}
.side summary::-webkit-details-marker{display:none}.side summary .mp{margin-left:auto;font-size:.72rem;color:var(--mute);font-weight:600;white-space:nowrap}
.side ol{list-style:none;margin:0 0 .4rem;padding:0}.side li a{display:flex;gap:.5rem;padding:.38rem .5rem .38rem 1.2rem;border-radius:8px;text-decoration:none;color:var(--ink);font-size:.88rem}
.side li a:hover,.side li a[aria-current=page]{background:var(--mint)}.side .ck{width:1.1rem;flex:none;color:var(--g2);font-weight:800}
.side .tag{font-size:.65rem;background:#FFF3D6;color:#7a5a00;border-radius:6px;padding:0 .35rem;margin-left:auto;align-self:center}
.side .hot{background:#FDE7DC;color:var(--red)}
main{padding:2rem clamp(1rem,4vw,3.5rem) 5rem;max-width:900px;width:100%}
.crumb{font-size:.8rem;color:var(--mute);text-transform:uppercase;letter-spacing:.1em}
.lesson h1{margin:.2rem 0 .3rem;font-size:clamp(1.5rem,3vw,2.1rem)}.meta{color:var(--mute);font-size:.9rem;margin-bottom:1rem}
.draft{background:#FFF8E6;border:1px dashed #E9B44C;padding:.5rem .8rem;border-radius:8px;font-size:.88rem}
table{border-collapse:collapse;width:100%;margin:1rem 0;font-size:.93rem;background:#fff}th{background:var(--g);color:#fff;text-align:left;padding:.5rem .6rem}td{border-bottom:1px solid var(--line);padding:.5rem .6rem;vertical-align:top}
blockquote{margin:1rem 0;padding:.7rem 1rem;background:var(--mint);border-left:4px solid var(--g2);border-radius:0 8px 8px 0}
.do{background:#fff;border:2px solid var(--g2);border-radius:14px;padding:1rem 1.2rem;margin:1.6rem 0;box-shadow:0 6px 18px #163a3214}
.do-h{font-weight:800;color:var(--g2);text-transform:uppercase;letter-spacing:.1em;font-size:.8rem}.do-h:before{content:"▶ "}
.dls{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:.5rem}.dl{background:var(--mint);border-radius:8px;padding:.35rem .7rem;font-size:.85rem;text-decoration:none;font-weight:600}
.navrow{display:flex;justify-content:space-between;gap:1rem;margin-top:2rem;flex-wrap:wrap}
/* animations */
.anim{background:#fff;border:1px solid var(--line);border-radius:14px;padding:1rem;margin:1.2rem 0}
.anim .ah{display:flex;justify-content:space-between;align-items:center;gap:1rem;margin-bottom:.5rem}.anim .ah b{color:var(--g)}
.anim .play{padding:.35rem .8rem;font-size:.85rem}
.bars{display:grid;gap:.45rem}.bar{display:grid;grid-template-columns:150px 1fr 96px;align-items:center;gap:.6rem;font-size:.85rem}
.track{position:relative;height:26px;background:#F0F4F2;border-radius:6px;overflow:hidden}
.fill{position:absolute;top:0;bottom:0;border-radius:6px;transform-origin:left;transform:scaleX(0);transition:transform .7s cubic-bezier(.2,.8,.2,1)}
.anim.on .fill{transform:scaleX(1)}.bar .v{text-align:right;font-variant-numeric:tabular-nums;font-weight:600;opacity:0;transition:opacity .4s}.anim.on .bar .v{opacity:1}
.cap{font-size:.8rem;color:var(--mute);margin-top:.5rem}
svg.team .node{opacity:0;transform:scale(.6);transform-origin:center;transform-box:fill-box;transition:all .5s}svg.team .ln{stroke-dasharray:400;stroke-dashoffset:400;transition:stroke-dashoffset .8s}
.anim.on svg.team .node{opacity:1;transform:none}.anim.on svg.team .ln{stroke-dashoffset:0}
svg.money .dot{opacity:0}.anim.on svg.money .dot{opacity:1;animation:flow 2.4s linear infinite}
@keyframes flow{from{offset-distance:0%}to{offset-distance:100%}}
@media (prefers-reduced-motion:reduce){.fill,.bar .v,svg.team .node,svg.team .ln{transition:none!important}.anim .fill{transform:scaleX(1)}.anim .bar .v{opacity:1}svg.team .node{opacity:1;transform:none}svg.team .ln{stroke-dashoffset:0}.anim.on svg.money .dot{animation:none;opacity:0}}
/* quiz */
.q{background:#fff;border:1px solid var(--line);border-radius:14px;padding:1rem 1.2rem;margin:1rem 0}.q fieldset{border:0;padding:0;margin:0}.q legend{font-weight:700;margin-bottom:.5rem}
.opt{display:flex;gap:.6rem;align-items:flex-start;padding:.5rem .6rem;border:2px solid var(--line);border-radius:10px;margin:.35rem 0;cursor:pointer}
.opt:hover{border-color:var(--g2)}.opt.right{border-color:#16A34A;background:#ECFDF3}.opt.wrong{border-color:var(--red);background:#FFF1EA}
.fb{margin-top:.5rem;font-size:.92rem;padding:.5rem .7rem;border-radius:8px}.fb.ok{background:#ECFDF3}.fb.no{background:#FFF1EA}
.score{font-size:1.2rem;font-weight:800;color:var(--g)}
/* tools */
.tool{background:#fff;border:1px solid var(--line);border-radius:14px;padding:1rem 1.2rem;margin:1rem 0}
.tabs{display:flex;gap:.4rem;flex-wrap:wrap;margin-bottom:.8rem}.tabs button{background:#fff;color:var(--g);border:2px solid var(--line)}.tabs button[aria-selected=true]{background:var(--g);color:#fff;border-color:var(--g)}
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:.6rem 1rem}
label.f{display:flex;flex-direction:column;font-size:.83rem;font-weight:600;color:var(--mute)}label.f input,label.f select,.ns input,.ns select{font:inherit;padding:.45rem .55rem;border:1px solid #c9d4cf;border-radius:8px;margin-top:.2rem;color:var(--ink);background:#fff;width:100%}
.ex{font-size:.8rem;color:#7a5a00;background:#FFF8E6;border-radius:8px;padding:.4rem .7rem;margin:.5rem 0}
.out table td:last-child{text-align:right;font-variant-numeric:tabular-nums}.big{font-size:1.25rem;font-weight:800;color:var(--g)}.neg{color:var(--red)}
.ns{overflow-x:auto}.ns table{min-width:620px}.ns td{padding:.3rem .4rem}.ns th{white-space:nowrap}.ns td:first-child{font-size:.85rem;font-weight:600;color:var(--mute);width:34%}
.ns tr.tot td{background:var(--mint);font-weight:800;color:var(--g)}.toolbar{display:flex;gap:.5rem;flex-wrap:wrap;margin:.8rem 0}
.note{font-size:.82rem;color:var(--mute)}
/* cert */
.cert canvas{width:100%;max-width:880px;height:auto;border:1px solid var(--line);border-radius:8px;background:#fff}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:.8rem}.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:1rem;text-decoration:none;color:var(--ink)}.card b{color:var(--g)}
.hero-dash{background:linear-gradient(135deg,var(--g),#1f5b4c);color:#fff;border-radius:18px;padding:1.4rem 1.6rem}.hero-dash h1{color:#fff;margin:.2rem 0}
footer.legal{font-size:.78rem;color:var(--mute);border-top:1px solid var(--line);margin-top:3rem;padding-top:1rem}
@media (max-width:860px){.layout{grid-template-columns:1fr}nav.side{position:fixed;inset:52px 0 0 0;max-height:none;transform:translateX(-100%);transition:transform .25s;z-index:15}
body.nav-open nav.side{transform:none}.menu{display:inline-block}.top .pbar{width:80px}.bar{grid-template-columns:96px 1fr 80px}}
@media print{.top,nav.side,.navrow,.toolbar,.tabs,.noprint,.play,.do .dls{display:none!important}.layout{display:block}main{padding:0;max-width:none}body{background:#fff}
.tool,.q,.anim{border:0;box-shadow:none}.fill{transform:scaleX(1)!important}.bar .v{opacity:1!important}
body.printing-cert main>*:not(.cert){display:none}body.printing-cert .cert>*:not(canvas){display:none}}
.anim,.q,.do,.tool{scroll-margin-top:70px}
@media (max-width:860px){.top .brand small{display:none}.top .brand{font-size:.95rem}.top{gap:8px}.menu{padding:.4rem .7rem}.top .ptxt{font-size:.72rem}}
main:focus{outline:none}
/* ===== v2 visual system ===== */
:root{--g:#0F3D33;--g2:#10B981;--g3:#34D399;--ink:#0B1F1A;--mute:#5B6B66;--line:#E3EAE7;--gold:#FBBF24;--bg:#F6F8F7;--mint:#E8F8F1;--rad:18px;--sh:0 10px 30px -12px rgba(15,61,51,.25)}
body{font-family:'Plus Jakarta Sans',Inter,system-ui,sans-serif;-webkit-font-smoothing:antialiased}
h1,h2,h3{font-family:'Plus Jakarta Sans',Inter,system-ui,sans-serif;letter-spacing:-.02em;font-weight:800}
a{color:#059669}
button,.btn{border-radius:999px;padding:.7rem 1.3rem;background:linear-gradient(135deg,#0F3D33,#065F46);box-shadow:0 6px 16px -6px rgba(6,95,70,.5);transition:transform .15s,box-shadow .15s}
button:hover,.btn:hover{transform:translateY(-1px);box-shadow:0 10px 22px -8px rgba(6,95,70,.6)}
.btn.alt,button.alt{background:#fff;box-shadow:none;border:1.5px solid var(--line);color:var(--g)}
.btn.cta{background:linear-gradient(135deg,#FBBF24,#F59E0B);color:#1a1300;box-shadow:0 10px 28px -10px rgba(245,158,11,.8)}
.top{background:rgba(9,40,33,.85);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid rgba(255,255,255,.08)}
.top .brand{display:flex;align-items:center;gap:.55rem}.top .brand small{color:#6EE7B7}
.logo{width:30px;height:30px;flex:none}
nav.side{background:#fff}.side li a:hover,.side li a[aria-current=page]{background:var(--mint)}
.card,.tool,.q,.anim,.do{border-radius:var(--rad);border:1px solid var(--line);box-shadow:var(--sh)}
.do{border:1px solid #A7F3D0;background:linear-gradient(180deg,#fff,#F0FDF7)}
.card{transition:transform .2s,box-shadow .2s}a.card:hover{transform:translateY(-3px)}
.hero-dash{background:radial-gradient(120% 140% at 100% 0%,#10B98155,transparent 50%),linear-gradient(135deg,#0B2E27,#0F3D33);border-radius:24px;padding:2rem}
.hero-dash p{color:#CFE9DF;max-width:52ch}
th{background:var(--g)}.tabs button{border-radius:999px;box-shadow:none}
.tabs button[aria-selected=true]{background:var(--g)}
label.f input,label.f select{border-radius:10px}
.page-hero{background:radial-gradient(100% 120% at 90% 0%,#10B98140,transparent 55%),linear-gradient(135deg,#0B2E27,#0F3D33);color:#fff;border-radius:24px;padding:2rem 1.6rem;margin-bottom:1.2rem}
.page-hero h1{color:#fff;margin:.3rem 0;font-size:clamp(1.7rem,4vw,2.5rem)}.page-hero p{color:#CFE9DF;margin:.3rem 0 1rem}
.pill{display:inline-flex;gap:.4rem;align-items:center;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);color:#A7F3D0;border-radius:999px;padding:.25rem .75rem;font-size:.78rem;font-weight:700}
.chips{display:flex;flex-wrap:wrap;gap:.5rem}.chips span{background:rgba(255,255,255,.08);border-radius:999px;padding:.3rem .8rem;font-size:.82rem}
.cards a.card .note:first-of-type{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.cards{gap:1rem}.card{padding:1.1rem 1.2rem}
.menu{white-space:nowrap}.top .brand span{white-space:nowrap}
@media(max-width:480px){.top .logo{display:none}.top .pbar{display:none}}

/* v3 fixes */
html,body{overflow-x:clip}
.logo{width:32px;height:32px;flex:none}
.btn.cta{background-color:#FBBF24;color:#1a1300}
.top .brand{min-width:0}.top .brand span{overflow:hidden;text-overflow:ellipsis}
input[type=range]{accent-color:#10B981;max-width:100%}
img,svg,canvas,table{max-width:100%}
.cards>.card{height:100%}
@media(max-width:480px){.top .btn.cta{padding:.4rem .8rem!important;font-size:.85rem}.top .brand{font-size:.9rem}main{padding-left:1rem;padding-right:1rem}.page-hero{padding:1.5rem 1.1rem}}
.layout>*,main{min-width:0}