body{margin:0}img{max-width:100%}[hidden]:not([hidden=until-found i]){display:none!important}
:root{
  --paper:#F6F7F9; --grid:#EDF0F4; --card:#FFFFFF; --line:#E3E7ED;
  --ink:#2B3242; --muted:#6C7586; --pen:#3E5AD0; --pen-soft:#EEF1FC;
  --red:#BF4B42; --red-soft:#FBEFED; --green:#2E8A60; --green-soft:#EAF5EF;
  --amber:#A26F1F; --amber-soft:#FAF3E6; --marker:#FFEB99; --face:#3E5AD0;
  --f-display:"Unbounded","Onest",system-ui,sans-serif;
  --f-body:"Onest",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --f-mono:ui-monospace,"SFMono-Regular",Consolas,monospace;
  --f-hand:"Segoe Print","Bradley Hand","Comic Sans MS",cursive;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --paper:#15191F; --grid:#1B2028; --card:#1C2129; --line:#2B313B;
  --ink:#D3D8E0; --muted:#8C95A5; --pen:#93A6EE; --pen-soft:#242B40;
  --red:#E08A80; --red-soft:#30221F; --green:#72C29C; --green-soft:#1B2C24;
  --amber:#D9AE66; --amber-soft:#2C251A; --marker:#7A6A2E; --face:#93A6EE; color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#15191F; --grid:#1B2028; --card:#1C2129; --line:#2B313B;
  --ink:#D3D8E0; --muted:#8C95A5; --pen:#93A6EE; --pen-soft:#242B40;
  --red:#E08A80; --red-soft:#30221F; --green:#72C29C; --green-soft:#1B2C24;
  --amber:#D9AE66; --amber-soft:#2C251A; --marker:#7A6A2E; --face:#93A6EE; color-scheme:dark}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}}
body{background:var(--paper);color:var(--ink);font-family:var(--f-body);font-size:17px;line-height:1.7;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:30;background:var(--paper)}
.wrap{max-width:1100px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
h1,h2,h3{font-family:var(--f-display);text-wrap:balance;margin:0;line-height:1.15;letter-spacing:-.01em}
h3{font-size:1.02rem;font-family:var(--f-body);font-weight:700;letter-spacing:0}
p{margin:0}
a{color:var(--pen)}
button,select,input{font:inherit;color:inherit}
:focus-visible{outline:2.5px solid var(--pen);outline-offset:2px;border-radius:6px}
.mono{font-family:var(--f-mono);font-size:.92em}
.muted{color:var(--muted)}
.hl{background:linear-gradient(transparent 58%,color-mix(in srgb,var(--marker) 70%,transparent) 58%);padding:0 .1em}
.fx{font-weight:600;font-variant-numeric:tabular-nums;white-space:nowrap}
.fr{display:inline-flex;flex-direction:column;vertical-align:middle;text-align:center;font-size:.86em;line-height:1.12;margin:0 .1em}
.fr>span:first-child{border-bottom:1.3px solid currentColor;padding:0 .2em}
.ov{border-top:1.3px solid currentColor;padding-top:.05em}
.hand{font-family:var(--f-hand);color:var(--pen);font-size:1.15rem;line-height:1.35}

/* top */
.hero{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.9fr);gap:28px;align-items:center;padding-block:36px 20px}
.eyebrow{font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);font-weight:600}
.hero h1{font-size:clamp(2rem,5.2vw,3.4rem);margin-top:8px}
.hero h1 span{color:var(--pen)}
.hero .lead{margin-top:16px;max-width:56ch;font-size:1.08rem;color:var(--muted)}
.stats{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:10px 14px;display:flex;flex-direction:column;min-width:0}
.stat b{font-family:var(--f-display);font-size:1.15rem;font-variant-numeric:tabular-nums}
.stat small{color:var(--muted);font-size:.78rem}
.herocv{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:8px;position:relative}
.herocv canvas{width:100%;height:280px;display:block}
.herocv .cap{position:absolute;left:14px;bottom:10px;font-size:.8rem;color:var(--muted)}

nav.toc{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:color-mix(in srgb,var(--paper) 94%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
nav.toc .wrap{display:flex;gap:6px;overflow-x:auto;padding-block:8px;scrollbar-width:thin}
nav.toc a{flex:none;text-decoration:none;color:var(--ink);font-size:.86rem;font-weight:500;padding:6px 12px;border-radius:999px;border:1px solid transparent;background:transparent;display:flex;gap:6px;align-items:center}
nav.toc a:hover{background:var(--card);border-color:var(--line)}
nav.toc a .n{font-family:var(--f-mono);color:var(--muted);font-size:.78rem}
nav.toc a.done{border-color:var(--green);color:var(--green)}
nav.toc a.done .n{color:var(--green)}
nav.toc .bar{flex:none;align-self:center;width:90px;height:6px;border-radius:9px;background:var(--grid);overflow:hidden;margin-left:4px}
nav.toc .bar i{display:block;height:100%;background:var(--green);width:0;transition:width .3s}

section.block{padding-block:72px 8px}
section.block+section.block{border-top:1px solid var(--line);margin-top:24px}
.shead{display:flex;gap:18px;align-items:flex-end;flex-wrap:wrap;margin-bottom:24px}
.num{font-family:var(--f-display);font-weight:700;font-size:3.2rem;line-height:.85;color:var(--pen-soft);-webkit-text-stroke:1.2px var(--pen)}
.shead h2{font-size:clamp(1.35rem,3vw,1.9rem)}
.meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}
.pill{font-size:.78rem;font-weight:500;padding:3px 10px;border-radius:999px;border:1px solid var(--line);background:transparent;color:var(--muted)}
.pill.hot{background:var(--pen-soft);border-color:transparent;color:var(--pen)}
.pill.mid{background:var(--amber-soft);border-color:transparent;color:var(--amber)}
.donebox{margin-left:auto;display:flex;align-items:center;gap:8px;font-weight:500;font-size:.9rem;background:var(--card);border:1px solid var(--line);padding:7px 14px;border-radius:999px;cursor:pointer;user-select:none}
.donebox input{width:18px;height:18px;accent-color:var(--green)}

.intuit{font-size:1.12rem;max-width:62ch;margin-bottom:26px;line-height:1.75}
.intuit b{color:var(--pen)}
.cols{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:24px;align-items:start}
.cols>*{min-width:0}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px 22px}
.card h3{margin-bottom:14px}
.stack{display:flex;flex-direction:column;gap:20px}
.rules{display:flex;flex-direction:column;gap:14px;margin:0;padding:0;list-style:none}
.rules li{display:grid;grid-template-columns:auto minmax(0,1fr);gap:10px;align-items:baseline}
.rules li .k{font-size:.78rem;font-weight:600;color:var(--pen);background:var(--pen-soft);border-radius:6px;padding:2px 8px;white-space:nowrap}
.rules li .why{display:block;color:var(--muted);font-size:.92rem;margin-top:2px}

.viz{background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden}
.viz canvas{display:block;width:100%;height:340px;touch-action:pan-y;cursor:grab}
.viz canvas:active{cursor:grabbing}
.ctrl{display:flex;flex-wrap:wrap;gap:8px;padding:12px 14px;border-top:1px solid var(--line);align-items:center}
.ctrl .lbl{font-size:.8rem;color:var(--muted);margin-right:2px}
.seg{display:inline-flex;flex-wrap:wrap;gap:4px}
.btn{border:1px solid var(--line);background:var(--card);border-radius:9px;padding:7px 12px;font-size:.88rem;font-weight:500;cursor:pointer;color:var(--ink)}
.btn:hover{border-color:var(--pen)}
.btn.on{background:var(--pen);border-color:var(--pen);color:var(--card)}
.btn.prim{background:var(--pen);color:var(--card);border-color:var(--pen)}
.btn.ghost{background:transparent}
.vizcap{padding:14px 16px;font-size:.95rem;border-top:1px solid var(--line);min-height:48px;line-height:1.6}
.vizcap b{color:var(--pen)}
.legend{display:flex;flex-wrap:wrap;gap:12px;font-size:.82rem;color:var(--muted)}
.legend i{display:inline-block;width:18px;height:4px;border-radius:2px;vertical-align:middle;margin-right:5px}
input[type=range]{accent-color:var(--pen);flex:1;min-width:120px}

table.t{width:100%;border-collapse:collapse;font-size:.95rem}
table.t th,table.t td{text-align:left;padding:10px 10px;border-bottom:1px solid var(--line);vertical-align:top}
table.t tr:last-child td{border-bottom:0}
table.t th{font-size:.75rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:600}
table.t td.c,table.t th.c{text-align:center;font-variant-numeric:tabular-nums}
.tscroll{overflow-x:auto}

details.prob{background:var(--card);border:1px solid var(--line);border-radius:14px}
details.prob+details.prob{margin-top:10px}
details.prob summary:hover{background:color-mix(in srgb,var(--pen-soft) 45%,transparent);border-radius:14px}
details.prob summary{cursor:pointer;list-style:none;padding:15px 18px;display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:14px;align-items:baseline;line-height:1.55}
details.prob summary::-webkit-details-marker{display:none}
details.prob summary .no{font-size:.78rem;font-weight:600;color:var(--muted);background:var(--paper);padding:2px 8px;border-radius:6px;white-space:nowrap}
details.prob summary .ans{font-size:.88rem;font-weight:600;color:var(--green);max-width:15em;text-align:right;overflow-wrap:anywhere}
details.prob[open] summary{border-bottom:1px solid var(--line);border-radius:14px 14px 0 0}
.sol{padding:16px 20px 18px;display:flex;flex-direction:column;gap:10px}
.sol .idea{font-size:.92rem;color:var(--pen);font-weight:600}
.sol ol{margin:0;padding-left:1.3em;display:flex;flex-direction:column;gap:8px}
.sol .res{font-weight:700;color:var(--green)}
.subhead{font-size:.8rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:600;margin:40px 0 14px}

.vids{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px}
.vid{display:grid;grid-template-columns:auto minmax(0,1fr);gap:12px;align-items:center;text-decoration:none;color:var(--ink);background:var(--card);border:1px solid var(--line);border-radius:14px;padding:12px 14px}
.vid:hover{border-color:var(--pen)}
.vid .pl{width:32px;height:32px;border-radius:50%;background:var(--pen-soft);position:relative;flex:none}
.vid .pl::after{content:"";position:absolute;left:13px;top:10px;border-left:9px solid var(--pen);border-top:6px solid transparent;border-bottom:6px solid transparent}
.vid span{font-size:.9rem;font-weight:500;line-height:1.35}
.vid small{display:block;color:var(--muted);font-weight:500;font-size:.76rem}

.lesson{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden}
.lesson canvas{width:100%;height:360px;display:block;touch-action:pan-y;cursor:grab;min-width:0}
.lside{display:flex;flex-direction:column;gap:14px;padding:22px 24px;border-left:1px solid var(--line);min-width:0}
.ltitle{font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:600}
.lcap{font-size:1.14rem;line-height:1.65;flex:1;min-height:7.5em}
.lcap b{color:var(--pen)}
.lctrl{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.lcount{font-size:.85rem;color:var(--muted);margin-left:auto;font-variant-numeric:tabular-nums}
.ldots{display:flex;gap:4px}
.ldots i{flex:1;height:5px;border-radius:3px;background:var(--line);overflow:hidden;display:block;cursor:pointer}
.ldots i b{display:block;height:100%;width:0;background:var(--pen)}
.warn{background:var(--red-soft);border-radius:14px;padding:16px 18px;font-size:.95rem}
.warn b{color:var(--red)}
.tip{background:var(--amber-soft);border-radius:14px;padding:16px 18px;font-size:.95rem}
.tip b{color:var(--amber)}

/* plan */
.days{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.day{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px;display:flex;flex-direction:column;gap:10px}
.day h3{font-family:var(--f-display);font-size:1rem;font-weight:700}
.day .when{font-size:.82rem;color:var(--muted);margin-top:-6px}
.task{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:10px;align-items:start;font-size:.95rem;padding:10px 0;border-top:1px solid var(--line)}
.task input{width:18px;height:18px;margin-top:2px;accent-color:var(--green)}
.task a{color:var(--ink);text-decoration:none;font-weight:500}
.task a:hover{color:var(--pen)}
.task .min{font-size:.8rem;color:var(--muted);white-space:nowrap;font-variant-numeric:tabular-nums}
.task.ok a{text-decoration:line-through;color:var(--muted)}

/* practice + quiz */
.pgrid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:24px;align-items:start}
.qcard{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px;display:flex;flex-direction:column;gap:14px}
.qcard .topic{font-size:.75rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:700}
.qcard .q{font-size:1.08rem;font-weight:500}
.ansrow{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.ansrow input{flex:1;min-width:140px;border:1.5px solid var(--line);background:var(--paper);border-radius:10px;padding:10px 14px}
.fb{font-weight:600;min-height:1.4em}
.fb.ok{color:var(--green)}
.fb.no{color:var(--red)}
.steps{margin:0;padding-left:1.3em;display:flex;flex-direction:column;gap:8px;font-size:.97rem}
.score{font-size:.9rem;color:var(--muted);font-variant-numeric:tabular-nums}
.flash{min-height:230px;justify-content:space-between}
.flash .a{border-top:1px dashed var(--line);padding-top:10px}
.flash .a b{color:var(--red);font-size:1.1rem}

/* cheat */
.cheat{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:18px}
.cheat .card{padding:14px 16px}
.cheat .card h3{font-size:.82rem;text-transform:uppercase;letter-spacing:.08em;color:var(--pen);font-weight:600}
.cheat dl{display:grid;grid-template-columns:auto minmax(0,1fr);gap:8px 14px;margin:0;font-size:.94rem}
.cheat dt{color:var(--muted)}
.cheat dd{margin:0;font-weight:600}

footer{padding-block:40px 60px;color:var(--muted);font-size:.85rem}

.mono{font-family:var(--f-body);font-size:1em}
@media (max-width:860px){
  body{font-size:16.5px}
  section.block{padding-block:52px 4px}
  .hero{grid-template-columns:minmax(0,1fr);padding-block:24px 10px}
  .cols,.pgrid{grid-template-columns:minmax(0,1fr)}
  .days{grid-template-columns:minmax(0,1fr)}
  .viz canvas{height:300px}
  .num{font-size:2.6rem}
  .lesson{grid-template-columns:minmax(0,1fr)}
  .lside{border-left:0;border-top:1px solid var(--line)}
  .lesson canvas{height:300px}
  .lcap{min-height:6em}
  .donebox{margin-left:0}
}
@media (max-width:560px){details.prob summary{grid-template-columns:auto minmax(0,1fr)}details.prob summary .ans{grid-column:2;text-align:left;max-width:none}}

.no.inl{display:inline-block;font-size:.8rem;font-weight:600;padding:0 7px;border-radius:6px;background:var(--paper);color:var(--muted);line-height:1.6;vertical-align:1px}
.no.nb,details.prob summary .no.nb{color:var(--pen);background:var(--pen-soft)}
.pill.nbp{background:var(--pen);border-color:var(--pen);color:var(--card)}
.nets{display:flex;flex-wrap:wrap;gap:18px 26px;align-items:flex-end}
.nets figure{margin:0;display:flex;flex-direction:column;align-items:center;gap:6px}
.nets figcaption{font-size:.8rem;color:var(--muted);font-variant-numeric:tabular-nums}
.nets figcaption.ok{color:var(--green);font-weight:600}
.nets figcaption.no{color:var(--red);font-weight:600}
.nets .cell{fill:var(--pen-soft);stroke:var(--pen);stroke-width:1.4}
.nets .cell.bad{fill:var(--red-soft);stroke:var(--red)}
.vgrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.vcard{margin:0;background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden;display:flex;flex-direction:column}
.vcard video{display:block;width:100%;aspect-ratio:16/9;background:#11151c}
.vcard figcaption{padding:14px 18px 16px;display:flex;flex-direction:column;gap:4px}
.vcard figcaption span{color:var(--muted);font-size:.93rem}
.vcard figcaption small{color:var(--muted);font-size:.8rem;font-variant-numeric:tabular-nums}
@media (max-width:860px){.vgrid{grid-template-columns:minmax(0,1fr)}}

/* site bar (matura.mk) */
.sitebar{background:var(--card);border-bottom:1px solid var(--line);font-size:.9rem}
.sitebar .wrap{display:flex;flex-wrap:wrap;align-items:center;gap:6px 14px;min-height:52px}
.sitebar .home{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--ink);text-decoration:none}
.sitebar .home img{width:28px;height:28px;flex:none}
.sitebar .crumb{color:var(--muted)}
.sitebar .crumb a{color:var(--muted)}
.sitebar .langs{margin-left:auto;display:flex;gap:4px;list-style:none;padding:0;margin-block:0}
.sitebar .langs a{display:inline-block;padding:4px 8px;border-radius:8px;color:var(--ink);text-decoration:none;font-weight:600;font-size:.82rem}
.sitebar .langs a[aria-current]{background:var(--pen-soft);color:var(--pen)}
.sitebar .langs a:hover{text-decoration:underline}
nav.toc{top:0;background:var(--paper)}
footer a{color:var(--muted)}