:root{--bg:#070e1b;--panel:#101b2c;--panel2:#111f32;--line:rgba(196,217,255,.13);--text:#f3f6ff;--muted:#b4c0d3;--gold:#f6cd80;--gold2:#b98c49;--blue:#91b8ff;--ok:#72edb8;--bad:#ff8e96}
*{box-sizing:border-box}html{min-height:100%;scroll-behavior:smooth}body{margin:0;min-height:100vh;color:var(--text);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:radial-gradient(circle at 15% 14%,rgba(32,75,140,.32),transparent 35%),radial-gradient(circle at 88% 70%,rgba(118,74,21,.14),transparent 45%),var(--bg);line-height:1.5;overflow-x:hidden}
body:before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.26;background-image:linear-gradient(to right,rgba(152,187,244,.09) 1px,transparent 1px),linear-gradient(to bottom,rgba(152,187,244,.09) 1px,transparent 1px);background-size:45px 45px;mask-image:linear-gradient(to bottom,black,transparent 90%)}
.orb{position:fixed;pointer-events:none;border:1px solid rgba(244,202,125,.23);border-radius:50%;width:440px;height:440px;top:-230px;right:-175px;box-shadow:0 0 0 75px rgba(244,202,125,.015),0 0 0 150px rgba(244,202,125,.012)}
.wrap{max-width:1060px;margin:auto;padding:26px 22px 65px;position:relative;z-index:1}.topline{position:relative;display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:27px;padding:18px 22px;border:1px solid rgba(196,217,255,.16);border-radius:24px;background:linear-gradient(135deg,rgba(18,30,52,.88),rgba(8,18,34,.9));box-shadow:0 22px 60px rgba(0,0,0,.24),inset 0 1px 0 rgba(255,255,255,.04);overflow:hidden;backdrop-filter:blur(12px)}.topline:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 12% 20%,rgba(246,205,128,.16),transparent 28%),radial-gradient(circle at 86% 22%,rgba(135,177,255,.18),transparent 30%),linear-gradient(to right,rgba(255,255,255,.035),transparent 38%,rgba(255,255,255,.025));pointer-events:none}.topline:after{content:"";position:absolute;left:22px;right:22px;bottom:0;height:1px;background:linear-gradient(90deg,transparent,rgba(246,205,128,.42),rgba(145,184,255,.34),transparent)}.brandWrap{display:flex;align-items:center;gap:16px;position:relative;z-index:1}.brand{display:flex;gap:14px;align-items:center;color:#f3f6ff}.logo{height:48px;width:48px;display:grid;place-items:center;color:var(--gold);border:1px solid rgba(246,205,128,.5);border-radius:16px;background:linear-gradient(160deg,rgba(246,205,128,.16),rgba(246,205,128,.05));font-family:Georgia,serif;font-size:28px;box-shadow:inset 0 1px 0 rgba(255,255,255,.06),0 10px 30px rgba(246,205,128,.08)}.brandText{display:flex;flex-direction:column;gap:2px}.brandKicker{font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:#8ea6cb;font-weight:800}.brandTitle{font-weight:800;letter-spacing:.1em;font-size:18px;text-transform:uppercase}.brandSub{font-size:12px;color:#c3d0e2;max-width:420px}.mini{position:relative;z-index:1;display:flex;flex-wrap:wrap;justify-content:flex-end;gap:9px}.miniBadge{display:inline-flex;align-items:center;gap:8px;padding:9px 12px;border-radius:999px;border:1px solid rgba(196,217,255,.15);background:rgba(255,255,255,.04);color:#dbe6f9;font-size:12px;font-weight:650;letter-spacing:.02em;box-shadow:inset 0 1px 0 rgba(255,255,255,.02)}.miniBadge strong{color:var(--gold);font-weight:800}.hidden{display:none!important}
.panel{border:1px solid var(--line);border-radius:27px;background:linear-gradient(130deg,rgba(23,35,54,.93),rgba(9,17,31,.94));box-shadow:0 24px 85px rgba(0,0,0,.24);overflow:hidden;backdrop-filter:blur(9px)}.intro{display:grid;grid-template-columns:1.06fr .94fr}.visual{background:#040a13;display:grid;place-items:center;min-height:440px;position:relative;padding:12px}.visual img{display:block;width:100%;height:auto;max-height:620px;object-fit:contain;border-radius:15px}.info{padding:49px 43px 45px;display:flex;flex-direction:column;justify-content:center}.eyebrow{font-size:12px;letter-spacing:.18em;font-weight:750;color:var(--gold);text-transform:uppercase}.info h1{font-family:Georgia,"Times New Roman",serif;font-weight:600;line-height:1.07;font-size:clamp(36px,4.4vw,58px);margin:18px 0 22px;letter-spacing:-.035em}.gradient{color:var(--gold)}.info p{color:var(--muted);font-size:16px;line-height:1.8;margin:0 0 27px}.chips{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 28px}.chip{border:1px solid var(--line);border-radius:40px;padding:8px 12px;color:#c9d6e9;font-size:12px}.primary{display:inline-flex;align-items:center;justify-content:center;gap:12px;cursor:pointer;appearance:none;border:1px solid #f7d9a2;color:#0c1423;font-weight:800;background:linear-gradient(130deg,#f9e6bd,#e6b86c);border-radius:14px;padding:16px 24px;font-size:15px;box-shadow:0 14px 36px rgba(231,174,90,.16);transition:transform .2s,filter .2s}.primary:hover:not(:disabled){filter:brightness(1.07);transform:translateY(-2px)}.primary:disabled{cursor:not-allowed;opacity:.43;filter:grayscale(.5);box-shadow:none}.secondary{cursor:pointer;border:1px solid rgba(200,219,255,.28);border-radius:14px;background:rgba(255,255,255,.045);padding:13px 18px;color:#d8e6ff;font:inherit;font-weight:650}.secondary:hover{background:rgba(255,255,255,.09)}button:focus-visible{outline:3px solid var(--blue);outline-offset:3px}
.foot{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:20px;align-items:center;margin-top:26px;padding:22px 24px;border:1px solid rgba(196,217,255,.14);border-radius:24px;background:linear-gradient(135deg,rgba(15,27,47,.86),rgba(8,16,30,.94));box-shadow:0 22px 50px rgba(0,0,0,.2);overflow:hidden}.foot:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 10% 50%,rgba(246,205,128,.1),transparent 28%),radial-gradient(circle at 85% 35%,rgba(145,184,255,.12),transparent 30%);pointer-events:none}.foot:after{content:"";position:absolute;left:24px;right:24px;top:0;height:1px;background:linear-gradient(90deg,transparent,rgba(246,205,128,.42),rgba(145,184,255,.32),transparent)}.footLeft,.footRight{position:relative;z-index:1}.footKicker{display:inline-block;font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--gold);font-weight:800;margin-bottom:8px}.footTitle{font-family:Georgia,serif;font-size:22px;line-height:1.18;margin:0 0 8px;color:#f3f6ff}.footCopy{margin:0;color:#9fb0c9;font-size:13px;line-height:1.65}.footLegal{display:flex;justify-content:flex-end;align-items:flex-end;height:100%;text-align:right}.footLegalInner{padding:14px 16px;border-radius:18px;border:1px solid rgba(196,217,255,.12);background:rgba(255,255,255,.03)}.footLegalInner .yearline{margin:0 0 4px;color:#f4f7ff;font-size:15px;font-weight:700}.footLegalInner .rights{margin:0;color:#8fa5c5;font-size:12px;letter-spacing:.04em}.questionWrap{max-width:790px;margin:auto}.progress{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;color:#abbeda;font-size:13px}.bar{height:4px;background:#28394e;border-radius:12px;margin-bottom:21px;overflow:hidden}.bar span{display:block;width:100%;height:100%;background:linear-gradient(90deg,#9b7e4f,#ffe8bd)}.questionCard{padding:38px 39px 35px}.questionCard h2{font:500 clamp(30px,5.2vw,49px)/1.15 Georgia,serif;margin:10px 0 16px}.questionCard .sub{color:var(--muted);margin:0 0 25px}.equation{color:var(--gold);font-family:Georgia,serif}.choices{display:grid;gap:12px}.choice{border:1px solid rgba(166,197,241,.2);border-radius:15px;background:rgba(8,19,35,.77);display:flex;align-items:center;gap:17px;width:100%;min-height:72px;padding:12px 17px;color:var(--text);text-align:left;font:inherit;cursor:pointer;transition:.16s}.choice:hover:not(:disabled){border-color:#cda36d;background:rgba(237,195,127,.055)}.choice .letter{border:1px solid rgba(193,211,247,.28);height:38px;width:38px;display:grid;place-items:center;border-radius:10px;font-size:13px;font-weight:800;color:#bbcee7;flex:0 0 auto}.choice .formula{font-family:Georgia,serif;font-size:27px;letter-spacing:.01em}.choice.selected{border-color:var(--gold);background:rgba(246,205,128,.085);box-shadow:inset 0 0 0 1px rgba(246,205,128,.18)}.choice.selected .letter{background:var(--gold);border-color:var(--gold);color:#142034}.choice.correct{border-color:rgba(114,237,184,.9);background:rgba(50,160,124,.14)}.choice.correct .letter{background:var(--ok);color:#09251b;border-color:var(--ok)}.choice.incorrect{border-color:rgba(255,142,150,.7);background:rgba(231,73,87,.1)}.choice.incorrect .letter{background:var(--bad);color:#280d12;border-color:var(--bad)}.choice:disabled{cursor:default}.actions{margin-top:23px;display:flex;align-items:center;justify-content:space-between;gap:14px}.actions .primary{min-width:206px}.hint{font-size:13px;color:#8eabc8}
.result{margin-top:21px;animation:emerge .32s ease-out}.resultHeader{border-radius:17px;padding:21px 22px;border:1px solid rgba(114,237,184,.3);background:rgba(29,135,99,.12)}.resultHeader.wrong{border-color:rgba(255,142,150,.28);background:rgba(205,73,81,.1)}.resultHeader h3{font-size:19px;margin:0 0 5px}.resultHeader p{margin:0;color:#cedbeb;font-size:14px}.stepsTitle{font-family:Georgia,serif;font-size:30px;margin:30px 0 13px}.step{display:grid;grid-template-columns:37px 1fr;gap:12px;margin:11px 0;padding:16px 18px;border-radius:16px;background:rgba(14,28,47,.75);border:1px solid var(--line)}.stepNumber{height:28px;width:28px;border-radius:8px;background:rgba(246,205,128,.12);color:var(--gold);display:grid;place-items:center;font-size:12px;font-weight:800}.step h4{margin:0 0 7px;font-size:15px}.step p{margin:0 0 6px;color:#b5c6db;font-size:13.5px}.mathrow{display:flex;justify-content:flex-start;align-items:center;gap:10px;flex-wrap:wrap;font-family:Georgia,serif;font-size:24px;line-height:1.65;color:#f6f3ec}.mathrow.small{font-size:20px}.mathrow strong{color:var(--gold)}sup{font-size:.58em;line-height:0;vertical-align:super}.fraction{display:inline-flex;flex-direction:column;align-items:center;vertical-align:middle;line-height:1.15;font-family:Georgia,serif;font-size:.98em}.fraction .numerator{padding:0 12px 5px;border-bottom:1px solid #e6e5e2}.fraction .denominator{padding-top:6px}.finalbox{text-align:center;padding:20px;border-radius:17px;background:linear-gradient(130deg,rgba(246,205,128,.13),rgba(19,32,49,.4));border:1px solid rgba(246,205,128,.32);margin:18px 0}.finalbox .lab{font-size:12px;text-transform:uppercase;letter-spacing:.1em;color:var(--gold)}.finalbox .big{font-family:Georgia,serif;font-size:49px;margin:2px 0;color:#fce1a9}.finalbox p{font-size:13px;color:#cad5e3;margin:0}.resultActions{display:flex;justify-content:center;gap:11px;flex-wrap:wrap;margin-top:19px} .author{text-align:center;font-size:12px;color:#8a9fba;margin-top:24px}@keyframes emerge{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:790px){.wrap{padding:17px 13px 50px}.topline{margin-bottom:17px;padding:16px 15px;border-radius:20px;align-items:flex-start;flex-direction:column}.brandWrap{width:100%}.logo{height:42px;width:42px;font-size:25px}.brandTitle{font-size:16px}.brandSub{font-size:11.5px;max-width:none}.mini{display:flex;justify-content:flex-start;gap:8px;width:100%}.miniBadge{font-size:11px;padding:8px 10px}.intro{grid-template-columns:1fr}.visual{padding:6px;min-height:0}.visual img{max-height:none}.info{padding:27px 23px 28px}.info h1{font-size:37px;margin:12px 0 13px}.info p{font-size:14px;line-height:1.65;margin-bottom:17px}.chips{margin-bottom:19px}.primary{width:100%}.panel{border-radius:20px}.questionCard{padding:26px 19px 24px}.questionCard h2{font-size:36px}.choice{min-height:66px;padding:11px 13px}.choice .formula{font-size:25px}.actions{flex-direction:column-reverse;align-items:stretch}.actions .primary{min-width:0}.hint{text-align:center}.foot{grid-template-columns:1fr;margin-top:16px;padding:19px 16px;border-radius:20px}.footTitle{font-size:19px}.footLegal{justify-content:flex-start;text-align:left}.footLegalInner{width:100%}.stepsTitle{font-size:27px}.step{padding:15px 12px;grid-template-columns:27px 1fr;gap:9px}.mathrow{font-size:22px}.mathrow.small{font-size:18px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}

/* Refinamento visual: header, hero e footer */
:root { --gold:#f5cd84; --silver:#dce8ff; }
body { background:radial-gradient(ellipse 700px 520px at 7% 3%,rgba(38,85,157,.28),transparent 72%),radial-gradient(ellipse 850px 590px at 99% 67%,rgba(146,100,37,.105),transparent 75%),#070d18; }
.wrap { max-width:1150px; padding-top:28px; }
.topline {
  border-radius:23px; padding:22px 27px; margin-bottom:26px; min-height:110px;
  background:linear-gradient(114deg,rgba(23,41,69,.95),rgba(9,19,37,.98) 56%,rgba(21,28,42,.97));
  border:1px solid rgba(225,203,150,.2); box-shadow:0 24px 65px rgba(0,0,0,.23),inset 0 1px 0 rgba(255,255,255,.055);
}
.topline:before { background:radial-gradient(ellipse 210px 130px at 8% 20%,rgba(245,205,132,.13),transparent 100%),radial-gradient(ellipse 400px 130px at 93% 100%,rgba(105,148,223,.12),transparent 100%),repeating-linear-gradient(125deg,transparent 0 65px,rgba(255,255,255,.015) 66px,transparent 67px); }
.topline:after { background:linear-gradient(90deg,transparent,rgba(245,205,132,.62),rgba(130,160,216,.42),transparent); }
.logo { flex-shrink:0;width:60px;height:60px;border-radius:17px;font-size:36px;position:relative;transform:rotate(-5deg);background:linear-gradient(155deg,rgba(250,213,144,.22),rgba(246,205,128,.02));box-shadow:inset 0 1px 0 rgba(255,255,255,.15),0 10px 35px rgba(241,185,96,.09); }
.logo:before { content:"";position:absolute;inset:5px;border:1px solid rgba(250,221,164,.18);border-radius:12px; }
.logo>span { transform:rotate(5deg);position:relative;z-index:1; }
.brand{gap:19px}.brandText{gap:6px}.brandKicker{display:flex;align-items:center;gap:9px;color:#adc0dd;font-size:9px;letter-spacing:.185em}
.brandKickerDot,.statusDot{width:6px;height:6px;display:inline-block;border-radius:50%;background:#efd098;box-shadow:0 0 13px rgba(245,205,132,.65)}
.brandKickerSep{color:#a78b66}.brandTitle{font-family:Georgia,"Times New Roman",serif;font-size:clamp(23px,2.55vw,32px);text-transform:none;letter-spacing:-.025em;line-height:1.13;font-weight:600;color:#f9f6f0}.brandTitleAccent{background:linear-gradient(100deg,#fff0ce,#e8b967);-webkit-background-clip:text;background-clip:text;color:transparent}
.headerRight{display:flex;align-items:center;gap:16px;position:relative;z-index:1;padding-left:18px;border-left:1px solid rgba(244,206,149,.14);flex-shrink:0}
.headerCounter{display:flex;align-items:baseline;line-height:1;font-family:Georgia,serif;color:#edd6ad;font-size:37px;white-space:nowrap}
.headerCounterDiv{color:#536681;font-size:19px;margin:0 4px}.headerCounterTotal{font-size:18px;color:#8fa5c8}
.headerCaption{display:flex;flex-direction:column;gap:6px}.headerCaptionEyebrow{font-size:9px;letter-spacing:.18em;color:#8ea4c4;font-weight:800}.headerCaptionMain{font-size:10px;letter-spacing:.14em;color:#e9d9bf;font-weight:800;white-space:nowrap;display:flex;align-items:center;gap:7px}
.panel.intro{border:1px solid rgba(231,203,156,.24);border-radius:28px;box-shadow:0 35px 85px rgba(0,0,0,.29),0 0 0 1px rgba(255,255,255,.025) inset;isolation:isolate;position:relative;background:linear-gradient(135deg,#142338,#091321)}
.panel.intro:before{content:"";z-index:2;pointer-events:none;position:absolute;inset:0;border-radius:28px;border:1px solid transparent;background:linear-gradient(125deg,rgba(255,218,160,.3),transparent 32%,rgba(119,174,255,.13) 70%,transparent) border-box;mask:linear-gradient(#fff 0 0) padding-box,linear-gradient(#fff 0 0);mask-composite:exclude}
.intro{grid-template-columns:1.02fr .98fr}
.visual{padding:13px;min-height:520px;background:linear-gradient(155deg,#050d19,#101c2b);position:relative}
.visual:before{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(ellipse 60% 44% at 50% 8%,rgba(233,198,128,.12),transparent 100%);z-index:1}
.visual img{border-radius:16px;box-shadow:0 12px 42px rgba(0,0,0,.3);position:relative;z-index:0}
.info{padding:58px clamp(25px,4.3vw,58px) 52px;position:relative;background:radial-gradient(ellipse 95% 60% at 90% 4%,rgba(53,88,145,.2),transparent 100%)}
.info:before{content:"2ⁿ";position:absolute;right:28px;top:35px;color:rgba(255,234,188,.045);font-size:112px;font-family:Georgia,serif;pointer-events:none;line-height:1}
.heroMeta{display:flex;align-items:center;gap:10px;font-size:10px;font-weight:800;letter-spacing:.13em;color:#e9d09e;position:relative}
.heroMetaStar{font-size:16px;color:#f7d995}.heroMetaDash{width:23px;height:1px;background:rgba(230,198,150,.45)}
.info h1{font-size:clamp(43px,4.9vw,66px);line-height:1.035;letter-spacing:-.055em;margin:28px 0 24px;max-width:430px;position:relative}
.gradient{background:linear-gradient(106deg,#ffe9bb,#edba71,#fff0c9);color:transparent;-webkit-background-clip:text;background-clip:text}
.info p.heroDescription{font-size:16px;line-height:1.84;color:#afc0d8;margin:0 0 29px;max-width:430px;position:relative}
.heroDescription strong{font-weight:700;color:#f7e7cb}
.statsGrid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-bottom:27px}
.statTile{padding:15px 12px;border:1px solid rgba(186,207,239,.14);border-radius:14px;background:linear-gradient(145deg,rgba(255,255,255,.055),rgba(255,255,255,.02));display:grid;grid-template-columns:auto 1fr;column-gap:6px;row-gap:5px;align-items:center}
.statIcon{color:var(--gold);font-size:15px}.statNumber{color:#f4f5f9;font-size:19px;font-weight:750;line-height:1}.statLabel{grid-column:1/-1;color:#a0b4d1;font-size:11px;letter-spacing:.03em}
.ctaBlock{display:flex;flex-direction:column;gap:14px}
.heroButton{width:100%;padding:10px 12px 10px 24px;min-height:66px;justify-content:space-between;border-radius:16px;background:linear-gradient(105deg,#ffebc4,#f0cc8a 57%,#dba85b);font-size:16px;box-shadow:0 20px 43px rgba(217,160,75,.22),inset 0 1px 0 rgba(255,255,255,.65)}
.heroArrow{display:grid;place-items:center;background:rgba(65,44,15,.12);border:1px solid rgba(67,48,21,.09);border-radius:11px;width:43px;height:43px;font-size:27px;font-weight:400;transition:transform .2s}
.heroButton:hover:not(:disabled) .heroArrow{transform:translate(2px,-2px)}
.heroNote{font-size:11px;letter-spacing:.045em;color:#93a9c5;text-align:center}.heroNote>span{color:#e9c885;font-size:17px;vertical-align:middle;margin-right:3px}
.foot{display:block;padding:0;margin-top:25px;border:1px solid rgba(235,208,160,.18);background:linear-gradient(120deg,rgba(18,32,54,.96),rgba(7,16,30,.97));border-radius:24px;isolation:isolate}
.foot:before{background:radial-gradient(ellipse 320px 180px at 12% 23%,rgba(232,193,119,.12),transparent 100%),radial-gradient(ellipse 290px 180px at 90% 75%,rgba(95,137,209,.14),transparent 100%)}
.foot:after{left:20px;right:20px;background:linear-gradient(90deg,transparent,rgba(245,205,132,.56),rgba(145,184,255,.38),transparent)}
.footerGlow{position:absolute;inset:0;pointer-events:none;background-image:radial-gradient(rgba(220,198,147,.22) .9px,transparent .9px);background-size:27px 27px;mask-image:linear-gradient(90deg,transparent 65%,black);opacity:.19}
.footTop,.footBottom{position:relative;z-index:1;display:flex;justify-content:space-between;align-items:center;gap:18px}
.footTop{padding:26px 28px 22px}.footSignature{display:flex;gap:15px;align-items:center}.footMark{display:grid;place-items:center;flex-shrink:0;width:47px;height:47px;border:1px solid rgba(245,205,132,.3);border-radius:14px;color:var(--gold);font:29px Georgia,serif;background:rgba(245,205,132,.07)}
.footKicker{display:block;color:#b59a74;font-size:9px;letter-spacing:.2em;font-weight:800;margin-bottom:5px}.footTitle{font-family:Georgia,serif;font-size:clamp(18px,2.1vw,23px);line-height:1.3;color:#f4f4f6;letter-spacing:-.025em;margin:0}.footTitle em{font-style:normal;color:#e6c082}
.socialLinks{display:flex;align-items:center;gap:10px;flex-shrink:0}.socialLink{position:relative;display:grid;place-items:center;width:49px;height:49px;border-radius:14px;color:#d9e4f5;border:1px solid rgba(190,208,238,.2);background:linear-gradient(145deg,rgba(255,255,255,.075),rgba(255,255,255,.025));text-decoration:none;transition:transform .2s,border-color .2s,background .2s,box-shadow .2s;box-shadow:inset 0 1px 0 rgba(255,255,255,.04)}
.socialLink svg{width:22px;height:22px}.socialLink:hover,.socialLink:focus-visible{color:#ffdd9f;transform:translateY(-3px);border-color:rgba(245,205,132,.6);background:rgba(245,205,132,.11);box-shadow:0 9px 22px rgba(0,0,0,.22)}
.socialLink:focus-visible{outline:2px solid #f6cd80;outline-offset:3px}.socialLink:after{position:absolute;content:attr(data-tooltip);white-space:nowrap;bottom:calc(100% + 11px);left:50%;transform:translate(-50%,4px);font-size:11px;font-weight:650;letter-spacing:.02em;color:#091321;background:#f7d9a2;border-radius:8px;padding:7px 10px;pointer-events:none;opacity:0;transition:opacity .18s,transform .18s;box-shadow:0 7px 24px rgba(0,0,0,.3)}.socialLink:hover:after,.socialLink:focus-visible:after{opacity:1;transform:translate(-50%,0)}
.footRule{height:1px;background:linear-gradient(90deg,transparent,rgba(199,215,245,.16),transparent);position:relative;z-index:1;margin:0 28px}
.footBottom{padding:18px 28px 19px;font-size:12px;letter-spacing:.025em;color:#a9bed7;flex-wrap:wrap}
.footBottomRight{font-size:9px;letter-spacing:.19em;color:#718cae;font-weight:800}.footBottomRight span{color:#efca89}
@media(max-width:900px){.headerCaption{display:none}.headerRight{padding-left:15px}.topline{padding:17px 19px}.logo{height:52px;width:52px;font-size:30px}.brandTitle{font-size:clamp(22px,3vw,29px)}}
@media(max-width:790px){.wrap{padding-top:14px}.intro{grid-template-columns:minmax(0,1fr)}.brandKickerDetail,.brandKickerSep{display:none}.topline{margin-bottom:17px;padding:18px 17px;min-height:0;flex-direction:row;align-items:center;gap:9px;border-radius:20px}.brandWrap{min-width:0}.brand{gap:11px}.logo{height:45px;width:45px;border-radius:13px;font-size:27px}.logo:before{inset:4px;border-radius:9px}.brandKicker{letter-spacing:.105em;font-size:8px;gap:6px}.brandKickerSep{display:none}.brandKickerSep~*{display:none}.brandTitle{font-size:clamp(18px,4.9vw,27px);letter-spacing:-.045em}.headerRight{padding-left:12px}.headerCounter{font-size:24px}.headerCounterDiv{font-size:13px;margin:0 2px}.headerCounterTotal{font-size:12px}.panel.intro{border-radius:22px}.panel.intro:before{border-radius:22px}.visual{padding:7px;min-height:0}.visual img{border-radius:16px}.info{padding:29px 23px 33px}.info:before{right:15px;top:17px;font-size:90px}.heroMeta{font-size:9px;letter-spacing:.12em}.info h1{font-size:clamp(40px,9vw,49px);margin:15px 0 15px;max-width:none}.info p.heroDescription{font-size:14px;line-height:1.78;margin:0 0 23px}.statsGrid{gap:8px;margin-bottom:22px}.statTile{padding:12px 8px;border-radius:12px}.statNumber{font-size:17px}.statLabel{font-size:10px}.heroButton{min-height:62px;border-radius:14px;padding:9px 10px 9px 21px}.heroArrow{height:41px;width:41px}.heroNote{font-size:10px}.foot{border-radius:20px;margin-top:18px}.footTop{padding:23px 19px 18px;gap:18px;align-items:flex-start;flex-wrap:wrap}.footSignature{gap:12px}.footMark{height:42px;width:42px;font-size:26px}.footTitle{font-size:19px}.socialLinks{margin-left:auto}.socialLink{height:45px;width:45px}.footRule{margin:0 19px}.footBottom{padding:17px 19px 19px;font-size:11px;gap:8px}.footBottomRight{font-size:8px}.socialLink:after{bottom:calc(100% + 7px)}}
@media(max-width:390px){.brandKicker{font-size:7.5px}.brandTitle{font-size:18px}.headerCounter{font-size:20px}.headerRight{padding-left:8px}.logo{width:39px;height:39px;font-size:24px}.brand{gap:8px}.footTop{flex-direction:column}.socialLinks{margin-left:0}}

/* Acessibilidade, navegação entre temas e autoria */
.brand{text-decoration:none;cursor:pointer}.brand:hover .brandTitleAccent{color:#fff3da}
.skip-link{position:absolute;z-index:1000;left:10px;top:-100px;background:#f5d69b;color:#071221;border-radius:8px;padding:9px 12px;font-weight:700}.skip-link:focus{top:8px}
.topicShelf{margin:33px 0 18px}.topicHead{display:flex;justify-content:space-between;align-items:end;gap:16px;margin:0 4px 16px}.topicHead h2{font-family:Georgia,serif;font-size:clamp(27px,3vw,36px);margin:3px 0;color:#f6f2e9}.topicHead p{font-size:13px;color:#b6c5d8;margin:0}.topicAll{color:#f6d495;font-weight:700;font-size:12px;text-decoration:none;white-space:nowrap}.topicAll:hover{text-decoration:underline}
.topicTrack{display:flex;overflow-x:auto;gap:13px;scroll-snap-type:x mandatory;overscroll-behavior-inline:contain;padding:3px 3px 12px;scrollbar-color:#6c7895 #101c30}
.topicItem{scroll-snap-align:start;display:flex;flex-direction:column;overflow:hidden;flex:0 0 min(275px,80%);color:#f5f4ed;text-decoration:none;border:1px solid rgba(182,204,241,.18);border-radius:18px;background:#14243a;transition:transform .18s,border-color .18s}.topicItem:hover{border-color:#e5c186;transform:translateY(-3px)}.topicItem[aria-current=page]{border-color:#dfbb7f;box-shadow:inset 0 0 0 1px rgba(223,187,127,.25)}.topicItem img{width:100%;height:136px;object-fit:cover}.topicCardInfo{padding:13px 15px 16px;display:grid;gap:5px}.topicCardInfo small{color:#f4d297;font-size:10px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.topicCardInfo strong{font:700 20px/1.3 Georgia,serif}.topicCardInfo span{font-size:12px;color:#b4c6dc}
.foot{background:linear-gradient(155deg,rgba(10,18,32,.97),rgba(8,13,25,.99));border:1px solid rgba(188,207,237,.17);padding:26px 28px 18px;border-radius:23px;display:block}
.foot:after{display:none}.footTop{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:18px;padding:0 0 22px}.footSignature{display:flex;gap:0}.footKicker{color:#aabace;font-size:11px;letter-spacing:.15em;font-weight:750}.footTitle{font-family:system-ui,-apple-system,sans-serif;font-size:22px;font-weight:800;margin:6px 0 5px;line-height:1.15}.footTitle a{color:#f5f6fc;text-decoration:none}.footTitle a:hover{color:#f8dbaa}.footRole{margin:0;color:#adbbce;font-size:12px}.socialLinks{display:flex;gap:8px}.socialLink{width:45px;height:45px;display:grid;place-items:center;border-radius:12px;background:rgba(255,255,255,.04);border:1px solid rgba(192,218,251,.17);color:#f1f4fb;position:relative;transition:background .18s,transform .18s}.socialLink:hover,.socialLink:focus-visible{color:#f7d396;background:rgba(236,193,119,.13);transform:translateY(-2px)}.socialLink svg{width:22px;height:22px}.socialLink:after{content:attr(data-tooltip);position:absolute;bottom:calc(100% + 10px);left:50%;transform:translate(-50%,5px);opacity:0;pointer-events:none;white-space:nowrap;background:#f7dfb1;color:#132033;padding:6px 10px;border-radius:7px;font-size:12px;font-weight:700;transition:opacity .15s,transform .15s}.socialLink:is(:hover,:focus-visible):after{opacity:1;transform:translate(-50%,0)}
.footRule{margin:0;border-top:1px solid rgba(185,210,242,.16)}.footBottom{display:flex;justify-content:center;text-align:center;padding:18px 0 0;color:#aabace;font-size:12px}.footBottomRight,.footerGlow{display:none}
.resultHeader{transition:background .4s,border-color .4s}.result:not(.hidden) .resultHeader{animation:emerge .4s ease-out}.choice.correct{box-shadow:0 0 0 1px rgba(112,237,185,.15),0 4px 22px rgba(30,166,105,.1)}.choice.incorrect{box-shadow:0 0 0 1px rgba(255,142,150,.18)}
.noteGallery{font-size:12px;color:#8ea8cb;margin-top:7px}
@media(max-width:790px){.topicShelf{margin-top:24px}.topicHead h2{font-size:26px}.topicAll{font-size:11px}.topicItem{flex-basis:220px}.topicItem img{height:115px}.foot{padding:23px 19px 20px}.footTop{padding-bottom:17px;align-items:flex-start}.footTitle{font-size:20px}.socialLink{height:44px;width:44px}.footBottom{padding-top:16px}}
@media(max-width:370px){.topicHead{align-items:flex-start;flex-direction:column;gap:8px}}
@media(prefers-reduced-motion:reduce){.topicItem,.socialLink{transition:none!important}}

/* Universo Matemático: trilha de 3 capítulos, avaliação individual e resumo */
.quizNav{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:0 0 19px}.backLink{display:inline-flex;align-items:center;justify-content:center;min-height:41px;padding:10px 15px;border:1px solid rgba(226,204,158,.3);border-radius:999px;background:rgba(246,205,128,.065);color:#f7d8a4;text-decoration:none;font-size:12px;font-weight:750;transition:background .2s,transform .2s}.backLink:hover{background:rgba(246,205,128,.17);transform:translateX(-2px)}.quizNavTag{font-size:10px;letter-spacing:.15em;font-weight:800;color:#8eabc8}.quizNavTag span{color:#eaca91}
.seriesRoadmap{margin:32px 0 12px}.seriesRailTitle{display:flex;align-items:end;justify-content:space-between;gap:15px;margin-bottom:16px}.seriesRailTitle h2{font:600 clamp(24px,3vw,34px)/1.2 Georgia,serif;margin:7px 0 0;color:#f4f2f0}.railHint{font-size:11px;letter-spacing:.02em;color:#98acc8}.seriesRail{display:flex;gap:13px;scroll-snap-type:x mandatory;overflow-x:auto;overscroll-behavior-inline:contain;padding:2px 2px 16px;scrollbar-color:#6a7690 #101b2b}.seriesTile{position:relative;isolation:isolate;display:flex;flex-direction:column;align-items:stretch;min-height:223px;text-align:left;scroll-snap-align:start;flex:1 0 min(260px,81%);padding:22px;border:1px solid rgba(200,217,242,.19);border-radius:21px;color:#f2f5fa;background:linear-gradient(145deg,rgba(27,45,69,.96),rgba(10,19,35,.96));cursor:pointer;box-shadow:0 14px 42px rgba(0,0,0,.13);transition:border-color .2s,transform .2s,box-shadow .2s;overflow:hidden}.seriesTile:before{content:"";position:absolute;right:-56px;top:-65px;height:200px;width:200px;border-radius:50%;border:1px solid rgba(243,202,125,.17);box-shadow:0 0 0 30px rgba(243,202,125,.016),0 0 0 70px rgba(145,184,255,.015);pointer-events:none}.seriesTile:hover{transform:translateY(-4px);border-color:rgba(243,202,125,.58);box-shadow:0 17px 45px rgba(0,0,0,.25)}.seriesTile:focus-visible,.backLink:focus-visible,.difficultyDetails summary:focus-visible{outline:3px solid var(--gold);outline-offset:3px}.seriesTileTop{display:flex;justify-content:space-between;color:#f6d398;letter-spacing:.18em;font-size:10px;font-weight:800}.seriesTileTop span{font-size:17px;letter-spacing:0}.seriesTileMath{font:600 43px/1.3 Georgia,serif;letter-spacing:-.035em;margin:13px 0 6px;color:#f9e3bb}.seriesTileMath small{font-size:23px;color:#d9e6fa;margin-left:8px}.seriesTile strong{font:600 19px Georgia,serif;margin-bottom:4px}.seriesTile>span:nth-last-child(2){font-size:12px;color:#a8bdd6}.seriesTileFoot{display:flex;gap:9px;align-items:center;justify-content:space-between;border-top:1px solid rgba(189,205,232,.15);padding-top:11px;margin-top:auto;font-size:9px;color:#c7dbf5;font-weight:800;letter-spacing:.12em}.seriesDone{color:#76e7b0;letter-spacing:.03em}.seriesTile.isCompleted{border-color:rgba(118,231,176,.38)}
.difficultyCard{margin:20px 0 9px;padding:23px;border:1px solid rgba(246,205,128,.34);border-radius:20px;background:radial-gradient(circle at 100% 0%,rgba(232,179,84,.14),transparent 50%),linear-gradient(135deg,rgba(27,40,60,.97),rgba(12,24,42,.97));box-shadow:inset 0 1px rgba(255,255,255,.055);animation:emerge .45s ease-out both}
.difficultyHeader{display:flex;justify-content:space-between;align-items:center;gap:17px}.difficultyKicker{font-size:10px;font-weight:800;letter-spacing:.18em;color:#e9c486}.difficultyHeader h3{font:600 clamp(20px,3vw,25px)/1.22 Georgia,serif;margin:6px 0 6px;color:#faf6ed}.difficultyHeader p{font-size:12px;color:#b5c6de;line-height:1.55;margin:0;max-width:390px}.difficultyScore{display:flex;align-items:baseline;justify-content:center;min-width:92px;padding:13px 10px 10px;gap:3px;border-radius:17px;background:linear-gradient(160deg,rgba(255,225,175,.1),rgba(246,205,128,.025));border:1px solid rgba(246,205,128,.25)}.difficultyScore strong{font:700 38px/1 Georgia,serif;color:#f7d290}.difficultyScore small{font:700 13px Georgia,serif;color:#c0af91}.difficultyMeter{height:9px;background:rgba(195,217,247,.14);border-radius:12px;overflow:hidden;margin:21px 0 10px;box-shadow:inset 0 2px 4px rgba(0,0,0,.15)}.difficultyMeter span{display:block;height:100%;width:0;background:linear-gradient(90deg,#87b4e5 0%,#c5b17b 45%,#e9bd70 100%);border-radius:12px;transition:width .85s cubic-bezier(.2,.8,.2,1);box-shadow:0 0 16px rgba(246,205,128,.3)}.difficultyScale{display:flex;justify-content:space-between;gap:10px;color:#dfc49d;font-size:11px;font-weight:750}.difficultyScale span{display:flex;flex-direction:column}.difficultyScale span:nth-child(2){text-align:center}.difficultyScale span:last-child{text-align:right}.difficultyScale small{font-size:10px;color:#91a8c7;font-weight:500;margin-top:2px}.difficultyVerdict{margin-top:17px;display:flex;align-items:flex-start;gap:12px}.difficultyLevel{flex:0 0 auto;font-size:11px;text-transform:uppercase;letter-spacing:.05em;font-weight:800;color:#101d32;background:#f2d29a;padding:7px 11px;border-radius:999px}.difficultyVerdict p{margin:2px 0 0;color:#c0d0e6;font-size:12px;line-height:1.65}.difficultyDetails{border-top:1px solid rgba(194,217,245,.13);margin-top:18px;padding-top:14px;color:#bed1e8}.difficultyDetails summary{cursor:pointer;list-style:none;font-size:12px;font-weight:750;color:#f3d6a1;display:flex;align-items:center;justify-content:space-between;gap:12px}.difficultyDetails summary:after{content:'+';font-size:19px;line-height:1}.difficultyDetails[open] summary:after{content:'−'}.difficultyDetails summary::-webkit-details-marker{display:none}.difficultyDetails summary:focus-visible{outline:2px solid #8eb8ff;outline-offset:5px}.difficultyBreakdown{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin:15px 0 10px}.difficultyBreakdown>div{padding:12px;border:1px solid rgba(194,217,245,.12);border-radius:11px;background:rgba(7,17,34,.36);display:grid;gap:6px}.difficultyBreakdown span{font-size:11px;color:#b5c8e0}.difficultyBreakdown strong{color:#f6d29a;font:700 17px Georgia,serif}.difficultyDetails>p{font-size:11px;line-height:1.65;margin:12px 0 0;color:#91a8c7}
.nextButton{min-width:210px}.menuInline{text-decoration:none;text-align:center;display:inline-flex;align-items:center;justify-content:center}
.finishPanel{position:relative;max-width:790px;margin:auto;isolation:isolate;padding:33px;border:1px solid rgba(246,205,128,.31);border-radius:28px;background:linear-gradient(145deg,#182b45,#0b1426 70%);overflow:hidden;box-shadow:0 25px 75px rgba(0,0,0,.25)}.finishHalo{position:absolute;right:-24px;top:-48px;color:rgba(243,202,125,.11);font:300 280px Georgia,serif;pointer-events:none}.finishInside{position:relative;z-index:1}.finishPanel h2{font:600 clamp(31px,5vw,50px)/1.1 Georgia,serif;margin:14px 0;color:#f4f4f8;max-width:520px}.finishPanel h2 em{font-style:normal;color:#f5cb82}.finishPanel p{color:#bbc9da;line-height:1.7;max-width:590px}.finishStats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:23px 0}.finishStats>div{border:1px solid rgba(192,214,247,.16);border-radius:16px;padding:15px 14px;background:rgba(255,255,255,.025);display:grid;gap:5px}.finishStats strong{font:700 28px Georgia,serif;color:#ffddaa}.finishStats span{font-size:11px;color:#9cb5d0}.finishList{display:grid;gap:9px;margin:17px 0 25px}.finishItem{display:flex;gap:12px;align-items:center;padding:13px 14px;border:1px solid rgba(192,214,247,.13);border-radius:13px;background:rgba(4,13,24,.28)}.finishIcon{width:28px;height:28px;border-radius:9px;display:grid;place-items:center;border:1px solid #677b95;color:#91a6c1;flex:0 0 auto}.finishIcon.good{color:#76ecc0;border-color:#429e7e;background:rgba(78,209,151,.1)}.finishIcon.bad{color:#f19ca5;border-color:#ae5660;background:rgba(218,93,110,.08)}.finishItemName{display:grid;gap:3px;min-width:0;flex:1}.finishItemName strong{font-size:13px;color:#f4f6fb}.finishItemName span{font-size:11px;color:#97aec9}.finishItemRating{color:#f3ce8e;font-size:12px;white-space:nowrap}.finishActions{display:flex;gap:10px;align-items:stretch;flex-wrap:wrap}.finishActions .primary,.finishActions .secondary{min-height:48px;flex:1;min-width:210px;text-decoration:none}.finishActions .secondary{display:inline-flex;align-items:center;justify-content:center}
@media(max-width:790px){.seriesRoadmap{margin:26px 0 5px}.seriesRailTitle h2{font-size:26px}.railHint{font-size:10px}.seriesTile{flex-basis:230px;min-height:218px;padding:18px}.seriesTileMath{font-size:41px}.quizNavTag{font-size:9px}.difficultyCard{padding:17px 15px}.difficultyHeader{align-items:flex-start}.difficultyHeader h3{font-size:20px}.difficultyScore{min-width:62px}.difficultyScore strong{font-size:32px}.difficultyVerdict{flex-direction:column;gap:9px}.finishPanel{padding:25px 18px;border-radius:21px}.finishStats{gap:7px}.finishStats>div{padding:12px 8px}.finishStats strong{font-size:22px}.finishStats span{font-size:10px}.finishActions .primary,.finishActions .secondary{width:100%}}
@media(max-width:400px){.seriesRailTitle{align-items:flex-start;flex-direction:column}.difficultyScale{font-size:10px}.difficultyScale small{font-size:9px}.difficultyBreakdown{grid-template-columns:1fr 1fr}.finishItem{padding:12px 9px;gap:9px}.finishItemName strong{font-size:12px}.finishItemRating{font-size:11px}.quizNavTag{display:none}}
@media(prefers-reduced-motion:reduce){.seriesTile,.backLink,.difficultyMeter span{transition:none!important}}

/* Contador exclusivo do catálogo */
.headerCounter:has(.catalogNumber){align-items:center;gap:6px}.catalogNumber{font:650 29px/1 Georgia,serif;color:#f0d19b}.catalogUnit{font:800 10px/1.1 system-ui,sans-serif;letter-spacing:.12em;color:#aebfd7}@media(max-width:790px){.catalogNumber{font-size:22px}.catalogUnit{font-size:9px;letter-spacing:.06em}.headerCounter:has(.catalogNumber){gap:4px}}@media(max-width:360px){.catalogNumber{font-size:19px}.catalogUnit{font-size:8px}}