:root{
  --navy:#0F1C3B;
  --blue:#102A83;
  --indigo:#3B3FCE;
  --orange:#EC610C;
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --text:#14203A;
  --muted:#68728A;
  --line:#E4E8F0;
  --shadow:0 18px 45px rgba(15,28,59,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,system-ui,sans-serif;background:var(--bg);color:var(--text)}
button,a{font:inherit}
a{text-decoration:none;color:inherit}
.app-shell{display:grid;grid-template-columns:280px 1fr;min-height:100vh}
.sidebar{position:sticky;top:0;height:100vh;background:var(--navy);color:white;padding:28px 22px;display:flex;flex-direction:column;z-index:20}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,var(--orange),#ff9a52);display:grid;place-items:center;font-family:Manrope;font-weight:800}
.brand strong,.brand span{display:block}
.brand span{font-size:12px;color:#AAB5CF;margin-top:2px}
.side-nav{display:grid;gap:7px;margin-top:42px}
.nav-item{padding:12px 14px;border-radius:12px;color:#B8C3DC;display:flex;gap:11px;align-items:center;font-size:14px}
.nav-item:hover,.nav-item.active{background:rgba(255,255,255,.09);color:white}
.module-card{margin-top:auto;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.10);border-radius:18px;padding:18px}
.eyebrow{font-size:11px;letter-spacing:.14em;font-weight:800;color:var(--indigo)}
.module-card .eyebrow{color:#9FAEFF}
.module-card strong{display:block;margin:7px 0 14px}
.progress{height:7px;background:rgba(255,255,255,.12);border-radius:99px;overflow:hidden}
.progress span{display:block;height:100%;background:var(--orange)}
.progress-row small{display:block;margin-top:8px;color:#AAB5CF}
.sidebar-footer{display:flex;justify-content:space-between;align-items:center;margin-top:18px;font-size:12px;color:#8F9AB5}
.theme-toggle,.menu-button{border:0;background:transparent;color:inherit;cursor:pointer}
.main{min-width:0}
.topbar{height:72px;display:flex;align-items:center;justify-content:space-between;padding:0 42px;background:rgba(255,255,255,.82);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.breadcrumbs{display:flex;gap:9px;color:var(--muted);font-size:14px}
.youtube-link{background:#111827;color:white;border-radius:12px;padding:10px 14px;font-weight:700;font-size:13px}
.menu-button{display:none;font-size:22px}
.hero{margin:28px 42px 0;background:linear-gradient(135deg,var(--navy) 0%,var(--blue) 58%,var(--indigo) 100%);border-radius:28px;min-height:480px;padding:58px;display:grid;grid-template-columns:1.15fr .85fr;overflow:hidden;color:white;box-shadow:var(--shadow)}
.hero h1{font-family:Manrope;font-size:54px;line-height:1.02;margin:20px 0 20px;letter-spacing:-.04em}
.hero h1 em{font-style:normal;color:#FF8C42}
.hero p{font-size:17px;line-height:1.7;color:#DCE4F6;max-width:680px}
.pill{display:inline-flex;padding:8px 11px;border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.08);border-radius:99px;font-size:11px;font-weight:800;letter-spacing:.12em}
.hero-actions{display:flex;gap:12px;margin:28px 0 20px}
.button{display:inline-flex;align-items:center;justify-content:center;border-radius:13px;padding:13px 18px;font-weight:800;border:1px solid transparent;cursor:pointer}
.button.primary{background:var(--orange);color:white}
.button.ghost{background:transparent;color:white;border-color:rgba(255,255,255,.22)}
.hero-meta{display:flex;gap:22px;color:#BFD0F6;font-size:13px}
.hero-visual{position:relative;min-height:360px}
.orbit{position:absolute;border:1px solid rgba(255,255,255,.18);border-radius:50%;inset:8%}
.orbit-b{inset:25%;transform:rotate(25deg)}
.core{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:88px;height:88px;border-radius:24px;background:white;color:var(--blue);display:grid;place-items:center;font-family:Manrope;font-size:32px;font-weight:800;box-shadow:0 25px 55px rgba(0,0,0,.22)}
.data-card{position:absolute;background:rgba(255,255,255,.96);color:var(--navy);padding:14px 16px;border-radius:16px;box-shadow:0 16px 40px rgba(0,0,0,.15);min-width:120px}
.data-card span,.data-card small{display:block}.data-card span{font-weight:800}.data-card small{font-size:9px;color:var(--muted);margin-top:3px;letter-spacing:.12em}
.card-a{top:15%;left:3%}.card-b{right:0;top:30%}.card-c{left:20%;bottom:7%}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:20px 42px}
.stats-grid article{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:22px;display:flex;align-items:baseline;gap:10px}
.stats-grid strong{font-family:Manrope;font-size:28px;color:var(--blue)}
.stats-grid span{font-size:13px;color:var(--muted)}
.section{margin:74px 42px}
.section-heading{max-width:760px;margin-bottom:30px}
.section h2{font-family:Manrope;font-size:38px;line-height:1.15;margin:10px 0 12px;letter-spacing:-.03em}
.section-heading p,.lead{color:var(--muted);line-height:1.75}
.flow-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.flow-card{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:24px;min-height:295px}
.flow-card.accent{background:var(--navy);color:white;border-color:var(--navy)}
.flow-index{position:absolute;right:18px;top:16px;font-size:12px;color:#A0A8BA;font-weight:800}
.flow-icon{width:46px;height:46px;border-radius:14px;background:#EEF1FF;color:var(--indigo);display:grid;place-items:center;font-weight:800}
.flow-card h3{font-family:Manrope;font-size:22px;margin:22px 0 8px}
.flow-card p{font-size:14px;color:var(--muted);line-height:1.6}.flow-card.accent p{color:#C8D2EA}
.example{position:absolute;left:24px;right:24px;bottom:22px;border-top:1px solid var(--line);padding-top:15px}
.flow-card.accent .example{border-color:rgba(255,255,255,.18)}
.example small,.example strong{display:block}.example small{font-size:9px;letter-spacing:.14em;color:#8B94A8}.example strong{margin-top:5px;font-size:13px}
.split-section{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.callout{border-radius:16px;padding:18px;margin-top:24px}.callout.blue{background:#EEF3FF;border-left:4px solid var(--blue)}
.callout p{margin:6px 0 0;color:var(--muted);line-height:1.6}
.comparison-card{background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:26px;box-shadow:var(--shadow)}
.comparison-row,.comparison-result{display:flex;justify-content:space-between;align-items:center;padding:18px;border-radius:14px;background:#F7F8FC}
.comparison-row span{color:var(--muted)}.comparison-row strong{font-size:20px}
.divider,.equals{text-align:center;font-weight:800;color:var(--orange);padding:8px}
.comparison-result{background:var(--navy);color:white}.comparison-result small{letter-spacing:.14em;color:#AFC0E8}
.mindmap{background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:34px;display:grid;grid-template-columns:1fr auto 1fr auto 1fr auto 1fr;gap:14px;align-items:center}
.node{padding:22px 16px;border-radius:18px;background:#F4F6FC;text-align:center}
.node small,.node strong,.node span{display:block}.node small{font-size:9px;letter-spacing:.14em;color:#8D96A9}.node strong{font-family:Manrope;font-size:19px;margin:8px 0 4px}.node span{font-size:12px;color:var(--muted)}
.node.final{background:var(--orange);color:white}.node.final small,.node.final span{color:#FFE1CF}.arrow{font-size:24px;color:var(--indigo)}
.orange{color:var(--orange)}
.trap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.trap-grid article{background:var(--surface);border:1px solid var(--line);border-top:4px solid var(--orange);border-radius:18px;padding:24px}
.trap-grid article>span{font-size:12px;font-weight:800;color:var(--orange)}
.trap-grid h3{font-size:18px;margin:18px 0 10px}.trap-grid p{font-size:14px;color:var(--muted);line-height:1.65}
.quiz{background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:28px;margin-bottom:18px}
.question-number{font-size:10px;letter-spacing:.15em;font-weight:800;color:var(--indigo)}
.quiz h3{font-family:Manrope;font-size:20px;margin:9px 0 20px}
.option{width:100%;text-align:left;border:1px solid var(--line);background:white;padding:14px 16px;border-radius:12px;margin:6px 0;cursor:pointer;color:var(--text)}
.option:hover{border-color:#AAB5FF}.option.correct{border-color:#1A9C66;background:#EAF8F2}.option.wrong{border-color:#D94A4A;background:#FFF0F0}
.feedback{margin-top:14px;font-size:14px;line-height:1.6;color:var(--muted)}
.flash-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.flashcard{min-height:210px;border:0;border-radius:22px;background:var(--navy);color:white;padding:28px;text-align:left;cursor:pointer;position:relative;overflow:hidden}
.flashcard small,.flashcard strong{display:block}.flashcard small{font-size:10px;letter-spacing:.15em;color:#A9B6D3}.flashcard strong{font-family:Manrope;font-size:22px;line-height:1.35;margin-top:18px}
.flashcard .back{display:none}.flashcard.flipped{background:var(--orange)}.flashcard.flipped .front{display:none}.flashcard.flipped .back{display:block}.flashcard.flipped small{color:#FFE3D2}
.cta-section{margin:70px 42px 30px;background:linear-gradient(135deg,var(--indigo),var(--blue));border-radius:24px;color:white;padding:36px 40px;display:flex;justify-content:space-between;align-items:center}
.cta-section h2{font-family:Manrope;font-size:28px;margin:9px 0}.cta-section p{color:#CFD8F2}.button.light{background:white;color:var(--blue)}
.page-footer{margin:0 42px 28px;padding:26px 0;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:12px}
.compact .brand-mark{width:34px;height:34px;border-radius:10px}.compact strong{color:var(--text)}
body.dark{--bg:#0B1224;--surface:#111A30;--text:#ECF1FF;--muted:#9AA7C0;--line:#25314C;--shadow:0 18px 45px rgba(0,0,0,.25)}
body.dark .topbar{background:rgba(11,18,36,.82)}body.dark .flow-icon,body.dark .callout.blue,body.dark .comparison-row,body.dark .node{background:#18233F}
body.dark .option{background:#111A30;color:var(--text)}
@media(max-width:1050px){
  .app-shell{grid-template-columns:1fr}.sidebar{position:fixed;left:-290px;width:280px;transition:.25s}.sidebar.open{left:0}.menu-button{display:block}.hero{grid-template-columns:1fr}.hero-visual{min-height:300px}.flow-grid{grid-template-columns:repeat(2,1fr)}.stats-grid{grid-template-columns:repeat(2,1fr)}.mindmap{grid-template-columns:1fr}.arrow{transform:rotate(90deg)}
}
@media(max-width:700px){
  .topbar{padding:0 18px}.breadcrumbs{display:none}.hero,.section,.stats-grid,.cta-section,.page-footer{margin-left:16px;margin-right:16px}.hero{padding:32px 24px}.hero h1{font-size:38px}.hero-meta{flex-direction:column;gap:8px}.stats-grid,.flow-grid,.trap-grid,.flash-grid,.split-section{grid-template-columns:1fr}.cta-section{align-items:flex-start;flex-direction:column;gap:20px}.section h2{font-size:31px}.hero-visual{min-height:260px}.card-b{right:3%}
}

/* Seletor de aulas */
.lesson-selector{position:relative;margin-bottom:20px}
.lesson-selector-button{width:100%;border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.07);color:white;border-radius:14px;padding:13px 14px;display:flex;align-items:center;justify-content:space-between;text-align:left;cursor:pointer}
.lesson-selector-label small,.lesson-selector-label strong{display:block}.lesson-selector-label small{font-size:9px;letter-spacing:.14em;color:#96A4C5;margin-bottom:5px}.lesson-selector-label strong{font-size:13px}.lesson-chevron{font-size:18px;transition:.2s}
.lesson-selector.open .lesson-chevron{transform:rotate(180deg)}
.lesson-dropdown{display:none;margin-top:8px;background:#172544;border:1px solid rgba(255,255,255,.12);border-radius:14px;padding:7px;box-shadow:0 18px 35px rgba(0,0,0,.25)}
.lesson-selector.open .lesson-dropdown{display:grid;gap:5px}
.lesson-option{display:grid;grid-template-columns:32px 1fr;gap:10px;padding:10px;border-radius:10px;color:#B8C3DC;align-items:center}
.lesson-option:hover,.lesson-option.active{background:rgba(255,255,255,.09);color:white}
.lesson-option>span{width:30px;height:30px;border-radius:9px;background:rgba(255,255,255,.08);display:grid;place-items:center;font-size:11px;font-weight:800}
.lesson-option.active>span{background:var(--orange);color:white}
.lesson-option strong,.lesson-option small{display:block}.lesson-option strong{font-size:11px;line-height:1.35}.lesson-option small{font-size:9px;color:#8F9AB5;margin-top:3px}
.nav-section-label{font-size:9px;letter-spacing:.14em;color:#7886A8;font-weight:800;margin:5px 14px 8px}