:root{font-family:Arial,Helvetica,sans-serif;color:#173238;background:#f5f7f4;font-size:18px;line-height:1.5}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,select:focus-visible{outline:4px solid #de8b39;outline-offset:3px}button:disabled{cursor:not-allowed;opacity:.55}.shell{min-height:100vh;display:flex;flex-direction:column}.topbar{background:#173f45;color:#fff;padding:15px max(24px,calc((100vw - 1160px)/2));display:flex;justify-content:space-between;align-items:center;gap:16px}.brand{display:flex;align-items:center;gap:12px;color:#fff;background:none;border:0;padding:0;text-align:left;line-height:1.1;font-size:15px}.brand strong{font-size:20px}.brand-mark{background:#d8e8cb;color:#173f45;border-radius:14px;width:48px;height:48px;display:grid;place-items:center;font-size:38px;line-height:1}.top-actions{display:flex;align-items:center;gap:10px}.top-actions 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/* Página inicial: apresentação clara para estudantes e professores. */
.landing{display:flex;flex-direction:column;gap:68px}
.landing-hero{display:grid;grid-template-columns:minmax(0,1.07fr) minmax(0,.93fr);gap:46px;align-items:center;position:relative;overflow:hidden;background:linear-gradient(125deg,#edf5ec 0%,#e7f2ec 55%,#d7eae3 100%);border:1px solid #d2e4d7;border-radius:30px;padding:clamp(32px,5vw,62px);min-height:570px}
.landing-hero::after{content:"";position:absolute;width:240px;height:240px;border:2px solid #c5dfd1;border-radius:50%;right:-80px;top:-105px;pointer-events:none}
.landing-copy,.landing-showcase{position:relative;z-index:1}
.landing-label{display:inline-block;border:1px solid #9ecbb7;background:#fff9;color:#245b52;border-radius:99px;padding:7px 13px;font-size:12px;font-weight:800;letter-spacing:.1em;margin-bottom:22px}
.landing-copy h1{font-size:clamp(42px,5.2vw,66px);letter-spacing:-.045em;line-height:1.07;max-width:620px;margin-bottom:22px}
.landing-copy h1 em{font-style:normal;color:#176b63;white-space:normal}
.landing-lead{font-size:20px;line-height:1.55;color:#365659;max-width:580px;margin-bottom:27px}
.landing-actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.landing-actions .btn{min-height:56px;padding:12px 20px}
.landing-primary{background:#173f45;border-color:#173f45;box-shadow:0 7px 0 #b9d7c6}
.landing-primary:hover{background:#102f34;border-color:#102f34}
.landing-primary span,.landing-teacher-button span{margin-left:12px;font-size:22px;line-height:0}
.landing-secondary{background:#fff;color:#173f45;border-color:#a6c9bb}
.landing-secondary:hover{background:#f7fbf8}
.landing-assurances{display:flex;gap:14px 20px;flex-wrap:wrap;margin-top:38px;color:#2b5551;font-size:14px;font-weight:700}
.landing-assurances span{white-space:nowrap}
.landing-assurances b{display:inline-grid;place-items:center;background:#d4e9d8;border-radius:50%;width:22px;height:22px;margin-right:5px;color:#176b63}
.landing-showcase{padding:26px 0 0}
.showcase-card{background:#fff;border:1px solid #c4d9ce;border-radius:24px;padding:20px 22px 18px;box-shadow:0 20px 46px #173f4520;max-width:440px;margin:auto}
.showcase-top{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13px;font-weight:800;color:#365f5b}
.showcase-brand{font-size:15px;color:#173f45}
.showcase-stage{background:#e9f3eb;border-radius:99px;padding:5px 10px}
.showcase-progress{display:flex;gap:5px;margin:20px 0}
.showcase-progress i{display:block;flex:1;height:7px;border-radius:99px;background:#dce9e2}
.showcase-progress i:first-child{background:#1c756a}
.showcase-small{color:#36766b;letter-spacing:.13em;font-size:11px;font-weight:800;margin-bottom:7px}
.showcase-card h2{font-size:clamp(24px,2.7vw,31px);margin-bottom:13px}
.showcase-figure{background:#f2f7f2;border:1px solid #cce0d2;border-radius:14px;padding:5px;min-height:128px;display:grid;place-items:center}
.showcase-figure svg{width:100%;height:126px}
.showcase-answers{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin-top:13px}
.showcase-answers span{border:2px solid #b9d0c4;border-radius:11px;text-align:center;padding:6px;font-size:22px;font-weight:800;color:#173f45}
.showcase-answers .showcase-answer-highlight{border-color:#1e796e;background:#e8f5ed}
.showcase-help{display:flex;justify-content:space-between;margin-top:13px;color:#3e6863;font-size:12px;font-weight:700}
.showcase-caption{text-align:center;color:#35615b;font-size:14px;font-weight:700;margin-top:18px}
.landing-section-heading{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:23px}
.landing-section-heading h2{font-size:clamp(30px,3.2vw,42px);max-width:570px;letter-spacing:-.025em;margin:0}
.landing-section-heading>p{max-width:320px;color:#52686a;margin:0}
.landing-benefit-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.landing-benefit{background:#fff;border:1px solid #d7e4db;border-radius:22px;padding:26px 25px 28px;min-height:235px;box-shadow:0 8px 24px #173f4508}
.benefit-icon{display:inline-grid;place-items:center;width:48px;height:48px;border-radius:13px;background:#dfede5;color:#176b63;font-size:17px;font-weight:800;margin-bottom:25px}
.landing-benefit:nth-child(2) .benefit-icon{background:#fff0d9;color:#8a5924}
.landing-benefit:nth-child(3) .benefit-icon{background:#e3e9f5;color:#405c88}
.landing-benefit h3{font-size:22px;margin-bottom:8px}
.landing-benefit p{color:#52686a;font-size:16px;margin:0}
.landing-teacher{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.82fr);gap:50px;align-items:center;background:#173f45;color:#fff;border-radius:28px;padding:clamp(30px,5vw,58px)}
.landing-teacher-label{color:#b5dfca;letter-spacing:.15em;font-size:13px;font-weight:800;margin-bottom:11px}
.landing-teacher h2{font-size:clamp(30px,3.3vw,43px);letter-spacing:-.03em;max-width:520px}
.landing-teacher p:not(.landing-teacher-label){color:#dcebe5;max-width:530px}
.landing-teacher-button{background:#fff;color:#173f45;border-color:#fff;margin-top:7px}
.landing-teacher-button:hover{background:#e6f1e9;border-color:#e6f1e9}
.teacher-preview{background:#fff;color:#173238;border-radius:20px;padding:24px;box-shadow:0 15px 35px #102b2d44}
.teacher-preview-head{display:flex;justify-content:space-between;gap:10px;color:#176b63;font-size:15px;font-weight:800;border-bottom:1px solid #d8e7df;padding-bottom:16px}
.teacher-preview-head span:last-child{color:#b8cec0;letter-spacing:3px}
.teacher-preview-row{display:flex;justify-content:space-between;gap:12px;border-bottom:1px solid #edf2ee;padding:14px 0;font-size:15px}
.teacher-preview-row strong{color:#173f45}
.teacher-preview-foot{background:#e9f4ed;border-radius:10px;padding:10px 13px;font-size:13px;font-weight:700;color:#245b52;margin-top:17px}
.landing-footnote{text-align:center;color:#607371;font-size:13px;margin:-32px 0 0}
@media(max-width:950px){.landing-hero{grid-template-columns:1fr;gap:18px}.landing-copy h1{max-width:700px}.landing-showcase{max-width:550px;width:100%;margin:auto}.landing-teacher{gap:24px}}
@media(max-width:760px){.landing{gap:46px}.landing-hero{border-radius:23px;padding:30px 22px;min-height:0}.landing-copy h1{font-size:clamp(38px,9vw,52px)}.landing-lead{font-size:18px}.landing-assurances{margin-top:30px}.landing-section-heading{display:block}.landing-section-heading>p{margin-top:12px}.landing-benefit-grid,.landing-teacher{grid-template-columns:1fr}.landing-benefit{min-height:0}.landing-teacher{border-radius:23px}.landing-footnote{margin:-18px 0 0}.showcase-card{padding:18px}.showcase-caption{margin-top:12px}}
@media(max-width:470px){.landing-actions{display:grid;grid-template-columns:1fr}.landing-actions .btn{text-align:center;width:100%}.landing-label{font-size:10px}.landing-assurances{display:grid;gap:9px}.landing-showcase{padding-top:9px}.showcase-card h2{font-size:24px}.showcase-figure svg{height:105px}.teacher-preview{padding:17px}}