:root{
  --bg:#071426; --bg2:#12365B; --card:#10243F; --card2:#0C1D35; --line:rgba(148,182,226,.18);
  --fg:#F2F7FF; --muted:#A9BCD6; --gold:#E8B64C; --goldInk:#1B1203; --cyan:#38D6F5; --ok:#4ADE9B; --bad:#FF8A8A; --blue:#6FA8FF;
  --chip:rgba(56,214,245,.13); --goldchip:rgba(232,182,76,.14); --okchip:rgba(74,222,155,.14); --badchip:rgba(255,138,138,.14);
  --f-display:'Fraunces', Georgia, 'Times New Roman', serif;
  --f-body:'Nunito Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --f-mono:'JetBrains Mono', ui-monospace, Menlo, monospace;
  color-scheme:dark;
}
@media (prefers-color-scheme: light){:root:not([data-theme="dark"]){
  --bg:#F3F8FF; --bg2:#E3EFFD; --card:#FFFFFF; --card2:#F2F7FE; --line:rgba(11,35,64,.13);
  --fg:#0B2340; --muted:#4A5F7D; --gold:#9A6400; --goldInk:#FFFFFF; --cyan:#0A6FBF; --ok:#137A4B; --bad:#B42318; --blue:#1F5FBF;
  --chip:rgba(10,111,191,.10); --goldchip:rgba(154,100,0,.10); --okchip:rgba(19,122,75,.10); --badchip:rgba(180,35,24,.09); color-scheme:light}}
:root[data-theme="light"]{
  --bg:#F3F8FF; --bg2:#E3EFFD; --card:#FFFFFF; --card2:#F2F7FE; --line:rgba(11,35,64,.13);
  --fg:#0B2340; --muted:#4A5F7D; --gold:#9A6400; --goldInk:#FFFFFF; --cyan:#0A6FBF; --ok:#137A4B; --bad:#B42318; --blue:#1F5FBF;
  --chip:rgba(10,111,191,.10); --goldchip:rgba(154,100,0,.10); --okchip:rgba(19,122,75,.10); --badchip:rgba(180,35,24,.09); color-scheme:light}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:linear-gradient(165deg,var(--bg) 0%,var(--bg2) 100%) fixed,var(--bg);background-color:var(--bg);color:var(--fg);font-family:var(--f-body);font-size:18px;line-height:1.65}
body.big{font-size:21px}
a{color:var(--cyan)}
button{font-family:inherit;cursor:pointer;color:inherit}
:focus-visible{outline:3px solid var(--cyan);outline-offset:2px}
h1,h2,h3,h4{font-family:var(--f-display);text-wrap:balance;margin:0;font-weight:600;letter-spacing:-.01em}
img{max-width:100%}
[hidden]{display:none!important}
.eyebrow{font-size:.72rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px 90px}

/* topo */
.top{display:flex;align-items:center;gap:10px;padding-block:16px;flex-wrap:wrap}
.logo{width:42px;height:42px;border-radius:12px;background:linear-gradient(145deg,#F5D27A,#C8912B);color:#1B1203;display:grid;place-items:center;flex-shrink:0;text-decoration:none}
.logo svg{width:24px;height:24px}
.brand{text-decoration:none;color:inherit;min-width:0}
.brand b{display:block;font-family:var(--f-display);font-size:1.08rem;font-weight:800;line-height:1.2}
.brand span{font-size:.74rem;color:var(--muted);letter-spacing:.06em;text-transform:uppercase;font-weight:700}
.spacer{flex:1}
.pill{display:inline-flex;align-items:center;gap:6px;height:38px;padding:0 14px;border-radius:99px;border:1px solid var(--line);background:var(--card);color:var(--fg);font-weight:700;font-size:.82rem;text-decoration:none}
.langs{display:inline-flex;border:1px solid var(--line);border-radius:99px;overflow:hidden;background:var(--card)}
.langs button{border:0;background:transparent;padding:0 12px;height:36px;font-size:.78rem;font-weight:800;color:var(--muted)}
.langs button[aria-pressed="true"]{background:var(--gold);color:var(--goldInk)}

/* home */
.hero{padding:34px 0 26px;display:grid;gap:14px}
.hero h1{font-size:clamp(2.1rem,5vw,3.6rem);line-height:1.04;font-weight:800}
.hero h1 em{font-style:italic;font-weight:500;color:var(--gold)}
.hero p{margin:0;color:var(--muted);max-width:62ch;font-size:1.05rem}
.motto{display:inline-flex;gap:.4em;font-family:var(--f-mono);font-weight:700;font-size:.85rem;letter-spacing:.06em;padding:8px 14px;border-radius:99px;background:var(--goldchip);border:1px solid color-mix(in srgb,var(--gold) 45%,transparent);width:max-content;max-width:100%;flex-wrap:wrap}
.motto b{color:var(--gold)}
.prog{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:6px}
.bar{flex:1 1 220px;max-width:420px;height:10px;border-radius:99px;background:var(--card);border:1px solid var(--line);overflow:hidden}
.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--gold),#F5D27A);border-radius:99px;transition:width .5s}
.cta{display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 22px;border-radius:99px;background:var(--gold);color:var(--goldInk);font-weight:800;text-decoration:none;border:0;font-size:.95rem}
.journey{display:flex;flex-wrap:wrap;gap:8px;margin:6px 0 4px}
.journey span{font-size:.8rem;font-weight:800;padding:6px 12px;border-radius:99px;background:var(--card);border:1px solid var(--line)}
.journey span:nth-child(1){color:var(--bad)} .journey span:nth-child(2){color:var(--cyan)} .journey span:nth-child(3){color:var(--ok)}

.mods{display:grid;gap:16px;margin-top:20px}
.mod{border-radius:22px;background:var(--card);border:1px solid var(--line);overflow:hidden}
.mod>button{all:unset;cursor:pointer;display:grid;grid-template-columns:56px minmax(0,1fr) auto;gap:14px;align-items:center;padding:16px 18px;width:100%;box-sizing:border-box}
.mod>button:focus-visible{outline:3px solid var(--cyan);outline-offset:-3px}
.mnum{width:56px;height:56px;border-radius:16px;display:grid;place-items:center;font-family:var(--f-display);font-weight:800;font-size:1.5rem;background:var(--goldchip);color:var(--gold)}
.mod h2{font-size:1.2rem;line-height:1.25}
.mod small{display:block;color:var(--muted);font-size:.82rem;margin-top:2px}
.mring{font-family:var(--f-mono);font-size:.8rem;font-weight:700;color:var(--muted);white-space:nowrap}
.mring.done{color:var(--ok)}
.lessons{list-style:none;margin:0;padding:0 10px 12px;display:grid;gap:4px}
.lessons a{display:grid;grid-template-columns:44px minmax(0,1fr) auto;gap:12px;align-items:center;padding:10px 10px;border-radius:14px;text-decoration:none;color:var(--fg)}
.lessons a:hover{background:var(--card2)}
.lessons i{font-style:normal;font-family:var(--f-mono);font-size:.8rem;font-weight:700;width:44px;height:30px;border-radius:99px;display:grid;place-items:center;background:var(--chip)}
.lessons a.done i{background:var(--okchip);color:var(--ok)}
.lessons em{font-style:normal;font-size:.78rem;color:var(--muted);white-space:nowrap}

/* aula */
.lhead{padding:20px 0 6px;display:grid;gap:10px}
.crumb{font-size:.8rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--gold)}
.lhead h1{font-size:clamp(1.9rem,4.4vw,3rem);line-height:1.08;font-weight:800}
.lhead .obj{color:var(--muted);max-width:68ch;margin:0}
.toc{display:flex;gap:6px;overflow-x:auto;padding:12px 0 4px;scrollbar-width:thin;position:sticky;top:0;z-index:5;background:linear-gradient(var(--bg),color-mix(in srgb,var(--bg) 85%,transparent));backdrop-filter:blur(8px)}
.toc a{flex-shrink:0;font-size:.78rem;font-weight:800;text-decoration:none;color:var(--muted);padding:7px 12px;border-radius:99px;border:1px solid var(--line);background:var(--card)}
.toc a:hover{color:var(--fg)}
.blocks{display:grid;gap:34px;margin-top:22px}
.sec{display:grid;gap:14px;scroll-margin-top:70px}
.sec>h2{font-size:clamp(1.35rem,2.6vw,1.8rem);line-height:1.2;display:flex;gap:12px;align-items:baseline}
.sec>h2 .n{font-family:var(--f-mono);font-size:.8rem;color:var(--gold);font-weight:700;flex-shrink:0;width:26px}
.prose{max-width:70ch}
.prose p{margin:0 0 1em}
.callout{max-width:70ch;border-left:4px solid var(--gold);background:var(--goldchip);padding:14px 20px;border-radius:0 16px 16px 0;font-family:var(--f-display);font-size:1.15rem;font-style:italic;line-height:1.45}

.hq{margin:0;border-radius:22px;overflow:hidden;border:1px solid var(--line);background:var(--card)}
.hq img{display:block;width:100%;max-width:760px;margin:0 auto;height:auto}
.hq figcaption{padding:10px 16px;font-size:.85rem;color:var(--muted)}
.hq figcaption b{color:var(--fg)}

.vid{margin:0;border-radius:22px;overflow:hidden;background:#000;border:1px solid var(--line)}
.vid video{display:block;width:100%;aspect-ratio:16/9;background:#000}
.vid figcaption{background:var(--card);padding:10px 16px;font-size:.82rem;color:var(--muted)}
.soon{border-radius:22px;border:1px dashed var(--line);background:var(--card2);padding:28px;text-align:center;color:var(--muted)}

.case{border-radius:22px;background:var(--card);border:1px solid var(--line);overflow:hidden;display:grid;grid-template-columns:minmax(0,1fr)}
.case .cbody{padding:20px 22px;display:grid;gap:10px}
.case .tag{display:inline-flex;gap:8px;align-items:center;font-size:.74rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--bad)}
.case .tag::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--bad);box-shadow:0 0 0 4px var(--badchip)}
.case h3{font-size:1.35rem;line-height:1.25}
.case p{margin:0}
.case .src{font-size:.8rem;color:var(--muted);font-weight:700}
.case img{display:block;width:100%;border-top:1px solid var(--line);background:#fff}

.howto{list-style:none;margin:0;padding:0;display:grid;gap:14px;counter-reset:s}
.howto li{border-radius:18px;background:var(--card);border:1px solid var(--line);padding:16px 18px;display:grid;grid-template-columns:40px minmax(0,1fr);gap:14px;align-items:start;counter-increment:s}
.howto li::before{content:counter(s);width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:var(--gold);color:var(--goldInk);font-weight:800;font-family:var(--f-mono)}
.howto h3{font-family:var(--f-body);font-size:1.02rem;font-weight:800;margin-bottom:4px}
.howto p{margin:0;color:var(--muted)}
.howto img{display:block;margin-top:12px;border-radius:12px;border:1px solid var(--line);max-height:620px;width:auto;max-width:100%;cursor:zoom-in;background:#fff}

.chart{border-radius:22px;background:var(--card);border:1px solid var(--line);padding:20px 22px;display:grid;gap:14px}
.chart h3{font-size:1.1rem}
.brow{display:grid;grid-template-columns:minmax(110px,34%) minmax(0,1fr);gap:12px;align-items:center;font-size:.9rem}
.brow .tr{height:30px;border-radius:8px;background:var(--card2);overflow:hidden;position:relative}
.brow .fl{position:absolute;inset:0 auto 0 0;width:0;background:color-mix(in srgb,var(--blue) 70%,transparent);border-radius:8px;transition:width 1s cubic-bezier(.2,.8,.2,1)}
.brow.hl .fl{background:var(--gold)}
.brow .v{position:absolute;right:8px;top:50%;transform:translateY(-50%);font-family:var(--f-mono);font-weight:700;font-size:.82rem}
.chart .src{font-size:.78rem;color:var(--muted)}

.errs{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.errs li{display:grid;grid-template-columns:30px minmax(0,1fr);gap:12px;align-items:start;padding:12px 16px;border-radius:14px;background:var(--badchip);border:1px solid color-mix(in srgb,var(--bad) 30%,transparent)}
.errs li::before{content:"✕";width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:var(--bad);color:#fff;font-weight:800;font-size:.85rem}
.chk{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.chk label{display:grid;grid-template-columns:30px minmax(0,1fr);gap:12px;align-items:start;padding:12px 16px;border-radius:14px;background:var(--card);border:1px solid var(--line);cursor:pointer}
.chk input{appearance:none;width:30px;height:30px;border-radius:9px;border:2px solid var(--line);margin:0;display:grid;place-items:center;cursor:pointer;background:var(--card2)}
.chk input:checked{background:var(--ok);border-color:var(--ok)}
.chk input:checked::after{content:"✓";color:#fff;font-weight:900}
.chk input:checked+span{color:var(--muted);text-decoration:line-through}

.quiz{display:grid;gap:16px}
.q{border-radius:18px;background:var(--card);border:1px solid var(--line);padding:18px 20px;display:grid;gap:12px}
.q h3{font-family:var(--f-body);font-size:1.02rem;font-weight:800}
.q .ops{display:grid;gap:8px}
.q button{text-align:left;padding:12px 14px;border-radius:12px;border:1.5px solid var(--line);background:var(--card2);font-size:.95rem;line-height:1.4}
.q button:hover:not(:disabled){border-color:var(--cyan)}
.q button.right{border-color:var(--ok);background:var(--okchip)}
.q button.wrong{border-color:var(--bad);background:var(--badchip)}
.q button:disabled{cursor:default}
.q .ex{font-size:.92rem;padding:10px 14px;border-radius:12px;background:var(--chip)}
.score{font-weight:800}

.sum{border-radius:22px;padding:22px;background:var(--goldchip);border:1px solid color-mix(in srgb,var(--gold) 40%,transparent);display:grid;gap:10px}
.sum ol{margin:0;padding-left:1.3em;display:grid;gap:6px;font-weight:700}
.sum p{margin:0;color:var(--muted)}

.nav{display:flex;gap:10px;justify-content:space-between;flex-wrap:wrap;margin-top:40px;padding-top:24px;border-top:1px solid var(--line)}
.nav a,.nav button{display:inline-flex;align-items:center;gap:8px;min-height:48px;padding:0 18px;border-radius:99px;border:1px solid var(--line);background:var(--card);color:var(--fg);font-weight:800;text-decoration:none;font-size:.9rem}
.nav .done{background:var(--ok);border-color:var(--ok);color:#06210F}
.foot{margin-top:50px;text-align:center;font-family:var(--f-mono);font-size:.78rem;letter-spacing:.08em;color:var(--muted)}
.foot b{color:var(--gold)}

.zoom{position:fixed;inset:0;z-index:80;background:rgba(3,8,16,.92);display:grid;place-items:center;padding:16px;cursor:zoom-out}
.zoom img{max-width:100%;max-height:100%;border-radius:10px;background:#fff}

@media (max-width:620px){
  body{font-size:17px}
  .wrap{padding-inline:16px}
  .brand span{display:none}
  .mod>button{grid-template-columns:46px minmax(0,1fr);padding:14px}
  .mnum{width:46px;height:46px;font-size:1.25rem}
  .mring{grid-column:2}
  .lessons a{grid-template-columns:40px minmax(0,1fr)}
  .lessons em{display:none}
  .brow{grid-template-columns:1fr}
  .howto li{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
@media print{.toc,.nav,.top .pill,.langs{display:none}}

.lhead .sub{margin:0;font-family:var(--f-display);font-size:1.25rem;font-style:italic;color:var(--gold);max-width:60ch}
.example{max-width:70ch;border:1px dashed var(--line);background:var(--card2);border-radius:16px;padding:14px 18px;font-size:.96rem}
.example b{display:block;font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--cyan);margin-bottom:4px}
.simg{margin:0;border-radius:20px;overflow:hidden;border:1px solid var(--line);background:var(--card2);max-width:900px}
.simg img{display:block;width:100%;height:auto;cursor:zoom-in}
.simg figcaption{padding:10px 16px;font-size:.86rem;color:var(--muted)}
.gl{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:10px}
.gl div{border:1px solid var(--line);border-radius:14px;padding:12px 14px;background:var(--card);font-size:.92rem}
.gl b{display:block;color:var(--gold);font-family:var(--f-display);font-size:1.05rem;margin-bottom:2px}
details.fold{border-radius:22px;background:var(--card);border:1px solid var(--line);padding:0;margin:0;min-width:0}
details.fold>summary{display:flex;align-items:center;gap:14px;padding:18px 22px;list-style:none;cursor:pointer}
details.fold>summary::-webkit-details-marker{display:none}
details.fold>summary .fi{flex:0 0 auto;width:46px;height:46px;border-radius:13px;display:grid;place-items:center;background:var(--goldchip);color:var(--gold);font-weight:900;font-size:1.3rem}
details.fold>summary .ft{flex:1 1 auto;min-width:0;display:flex;flex-direction:column;gap:2px}
details.fold>summary .ft b{font-family:var(--f-display);font-size:1.2rem;font-weight:700;line-height:1.2}
details.fold>summary .ft span{color:var(--muted);font-size:.88rem;font-weight:600}
details.fold>summary .fa{flex:0 0 auto;font-size:.82rem;font-weight:800;color:var(--gold);border:1.5px solid var(--gold);border-radius:99px;padding:5px 12px}
details.fold[open]>summary .fa::after{content:" ▲"}
details.fold:not([open])>summary .fa::after{content:" ▼"}
details.fold>.fb{padding:18px 22px 22px;border-top:1px solid var(--line)}
/* ULI */
.ulifab{position:fixed;right:18px;bottom:calc(18px + env(safe-area-inset-bottom,0px));z-index:70;width:64px;height:64px;border-radius:50%;border:0;background:radial-gradient(circle at 35% 30%,#7EE8FF,#1B8FB8);color:#04202D;font:900 .95rem/1 var(--f-mono);box-shadow:0 10px 30px -8px rgba(56,214,245,.7),0 0 0 4px rgba(56,214,245,.18)}
.ulifab:hover{box-shadow:0 0 0 2px #38D6F5,0 0 26px 6px rgba(56,214,245,.55)}
.ulibox{position:fixed;right:18px;bottom:96px;z-index:71;width:min(420px,calc(100vw - 32px));height:min(560px,calc(100vh - 130px));display:flex;flex-direction:column;border-radius:22px;background:var(--card);border:1px solid #38D6F5;box-shadow:0 0 30px -6px rgba(56,214,245,.6),0 30px 80px -30px rgba(0,0,0,.6);overflow:hidden}
.ulibox header{display:flex;align-items:center;gap:10px;padding:14px 16px;border-bottom:1px solid var(--line)}
.ulibox header b{font-family:var(--f-mono);color:var(--cyan);font-size:1.05rem}
.ulibox header span{flex:1;color:var(--muted);font-size:.85rem;font-weight:700}
.ulibox .ux{border:0;background:transparent;font-size:1.1rem}
.ulog{flex:1;overflow:auto;padding:14px;display:flex;flex-direction:column;gap:10px}
.um{max-width:88%;padding:10px 13px;border-radius:14px;font-size:.93rem;line-height:1.5}
.um.bot{background:var(--card2);border:1px solid var(--line);align-self:flex-start}
.um.me{background:var(--chip);border:1px solid color-mix(in srgb,var(--cyan) 40%,transparent);align-self:flex-end}
.um.dots{display:flex;gap:5px}.um.dots i{width:7px;height:7px;border-radius:50%;background:var(--cyan);animation:blink 1s infinite}.um.dots i:nth-child(2){animation-delay:.2s}.um.dots i:nth-child(3){animation-delay:.4s}
@keyframes blink{50%{opacity:.25}}
.ulibox form{display:flex;gap:8px;padding:12px;border-top:1px solid var(--line)}
.ulibox textarea{flex:1;resize:none;font:inherit;font-size:.93rem;padding:10px 12px;border-radius:12px;border:1.5px solid var(--line);background:var(--card2);color:var(--fg)}
.ulibox form button{border:0;border-radius:12px;padding:0 16px;background:var(--cyan);color:#04202D;font-weight:900}
@media (max-width:620px){.ulibox{right:8px;left:8px;width:auto;bottom:90px}}