:root{
      --bg:#fffbe6;
      --card:#ffffff;
      --ink:#163028;
      --muted:#53645f;
      --brand:#0f3d2e;
      --brand-2:#1f6d4f;
      --accent:#f3b63f;
      --accent-2:#e67e22;
      --danger:#b64141;
      --good:#237a3b;
      --soft:#eef5f1;
      --shadow:0 10px 30px rgba(15,61,46,.10);
      --radius:22px;
      --footer-green:#1b4332;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: Arial, Helvetica, sans-serif;
      background:linear-gradient(180deg,#fffbe6 0%, #f8f4df 100%);
      color:var(--ink);
      line-height:1.6;
    }

    .wrap{max-width:1160px;margin:0 auto;padding:18px}

    header{
      position:relative;
      overflow:hidden;
      background:linear-gradient(135deg,var(--brand) 0%, #174f3c 52%, #2c7a5d 100%);
      color:#fff;
      padding:28px 0 46px;
      box-shadow:0 8px 26px rgba(0,0,0,.15);
    }

    header::after{
      content:"";
      position:absolute;
      inset:auto -80px -120px auto;
      width:340px;height:340px;
      background:radial-gradient(circle, rgba(255,255,255,.22), transparent 65%);
      border-radius:50%;
    }

    .topbar{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:26px}
    .logo-box{
      width:72px;height:72px;border-radius:18px;flex:0 0 72px;
      background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.18);
      display:grid;place-items:center;overflow:hidden;backdrop-filter: blur(4px);
    }
    .logo-box img{max-width:100%;max-height:100%;display:block}
    .logo-fallback{font-size:28px}

    .eyebrow{
      display:inline-block;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.18);
      padding:7px 12px;border-radius:999px;font-weight:700;letter-spacing:.2px;margin-bottom:10px;font-size:.95rem;
    }

    h1{margin:0 0 12px;font-size:clamp(2rem, 4vw, 3.2rem);line-height:1.1}
    .lead{max-width:850px;font-size:1.08rem;color:#eef8f2;margin-bottom:18px}

    .hero-grid{display:grid;grid-template-columns:1.6fr .9fr;gap:18px;align-items:start}
    .hero-card,.panel,.exercise,.card,.tip,.mini,.quote-box,.table-box{
      background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid rgba(15,61,46,.08);
    }
    .hero-card{padding:22px;background:rgba(255,255,255,.10);border-color:rgba(255,255,255,.18);box-shadow:none}
    .hero-card h2{margin:0 0 8px;font-size:1.15rem}
    .hero-card p{margin:0;color:#eef8f2}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}

    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 18px;border-radius:14px;
      text-decoration:none;border:none;cursor:pointer;font-weight:700;font-size:1rem;
      transition:transform .18s ease, box-shadow .18s ease, filter .18s ease;
    }
    .btn:hover{transform:translateY(-2px);filter:brightness(1.02)}
    .btn-main{background:#fffbe6;color:var(--brand);box-shadow:0 8px 18px rgba(0,0,0,.12)}
    .btn-outline{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.35)}
    .btn-soft{background:var(--soft);color:var(--brand)}

    .hero-side{display:grid;gap:12px}
    .hero-side .mini{padding:16px;background:rgba(255,255,255,.10);color:#fff;border-color:rgba(255,255,255,.18);box-shadow:none}
    .hero-side strong{display:block;font-size:1.08rem}

    nav.quick-nav{margin-top:-24px;position:relative;z-index:2}
    .quick-nav .panel{padding:16px;display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
    .chip{padding:9px 12px;background:#f3f8f5;color:var(--brand);border-radius:999px;text-decoration:none;font-weight:700;font-size:.95rem;border:1px solid rgba(15,61,46,.08)}

    main{padding:28px 0 8px}
    section{margin:22px 0 30px}
    .section-head{margin-bottom:14px}
    .section-head h2{margin:0 0 6px;font-size:clamp(1.45rem, 2.2vw, 2rem);color:var(--brand)}
    .section-head p{margin:0;color:var(--muted)}

    .grid-2{display:grid;grid-template-columns:1.2fr .9fr;gap:18px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .panel,.exercise,.quote-box,.table-box{padding:22px}
    .panel h3,.exercise h3,.quote-box h3,.table-box h3{margin:0 0 12px;color:var(--brand);font-size:1.15rem}

    .formula-block{
      background:#f7fbf8;
      border:1px dashed rgba(15,61,46,.18);
      border-radius:18px;
      padding:18px;
      font-size:1.08rem;
      text-align:center;
      margin:12px 0;
      overflow-x:auto;
      overflow-y:visible;
    }
    .formula-big{font-size:1.4rem;font-weight:700;color:var(--brand)}
    .math{font-size:1.08em}
    .katex{font-size:1.05em;max-width:100%}
    .formula-big .katex{font-size:1.18em}
    .formula-block .katex-display,
    .result .katex-display,
    .step .katex-display,
    .proof-block .katex-display,
    .table-box .katex-display,
    .math-display .katex-display{
      margin:.45em 0;
      overflow-x:auto;
      overflow-y:hidden;
      padding:4px 2px;
    }
    .math-display{
      margin:10px 0;
      overflow-x:auto;
      overflow-y:visible;
      -webkit-overflow-scrolling:touch;
    }
    .math-inline .katex{font-size:1.02em;white-space:normal}
    .katex-display{display:block;max-width:100%}
    .katex-display > .katex{display:inline-block;max-width:none;white-space:normal}
    .katex-html{max-width:100%}

    .panel-highlight{
      background:linear-gradient(135deg, #fff4cf 0%, #fff9e8 100%);
      border-left:6px solid var(--accent);
      padding:20px 22px;border-radius:20px;box-shadow:var(--shadow);
      font-weight:700;font-size:1.16rem;color:var(--brand);
    }

    .input-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:14px 0}
    .input-grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:14px 0}
    label{display:block;font-weight:700;color:var(--brand);margin-bottom:6px}
    input, select{
      width:100%;padding:12px 13px;border-radius:12px;border:1px solid #cfe0d7;font-size:1rem;background:#fff;color:var(--ink);
    }
    input:focus, select:focus{outline:2px solid rgba(31,109,79,.18);border-color:var(--brand-2)}

    .result{
      margin-top:12px;padding:14px 16px;border-radius:16px;background:#f3f8f5;border-left:5px solid var(--brand-2);font-weight:700;
      overflow-x:auto;
    }
    .result.good{border-left-color:var(--good);background:#eef8f1}
    .result.bad{border-left-color:var(--danger);background:#fff1f1}
    .result.warn{border-left-color:var(--accent-2);background:#fff6ea}

    .steps{display:grid;gap:12px}
    .step{
      padding:14px 16px;border-radius:16px;background:#fafdfb;border:1px solid rgba(15,61,46,.08);
      overflow-x:auto;
    }
    .step strong{color:var(--brand)}
    .hidden{display:none}

    .two-col-steps{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .proof-block{
      padding:18px;border-radius:18px;background:#fafdfb;border:1px solid rgba(15,61,46,.08);
      overflow-x:auto;
      overflow-y:visible;
    }
    .proof-title{margin:0 0 10px;color:var(--brand);font-weight:700}

    .control-note{font-size:.95rem;color:var(--muted);margin-top:6px}
    .legend{display:flex;gap:14px;flex-wrap:wrap;font-size:.95rem;color:var(--muted);margin-top:12px}
    .legend span{display:inline-flex;align-items:center;gap:8px}
    .dot{width:12px;height:12px;border-radius:50%}
    .line{width:22px;height:0;border-top:3px solid}

    canvas.graph{
      display:block;
      width:100%;
      max-width:100%;
      min-height:260px;
      height:auto;
      background:linear-gradient(180deg,#ffffff 0%, #fbfcfb 100%);
      border-radius:18px;
      border:1px solid rgba(15,61,46,.10);
      box-shadow: inset 0 0 0 1px rgba(255,255,255,.5);
    }

    .mode-buttons{display:flex;gap:10px;flex-wrap:wrap}
    .mode-btn{
      border:none;cursor:pointer;padding:10px 14px;border-radius:12px;font-weight:700;
      background:#edf5f1;color:var(--brand);transition:all .2s ease;
    }
    .mode-btn.active{background:var(--brand);color:#fff}

    table{width:100%;border-collapse:collapse;border-radius:16px;overflow:hidden;background:#fff}
    th, td{padding:12px 10px;border-bottom:1px solid #ecf0ee;text-align:center}
    th{background:#f3f8f5;color:var(--brand)}
    tr:last-child td{border-bottom:none}

    .badge-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
    .badge{background:#eff7f2;color:var(--brand);padding:8px 11px;border-radius:999px;font-weight:700;font-size:.92rem}

    details.tip{padding:16px 18px;margin-bottom:12px;background:#fff}
    details.tip summary{cursor:pointer;font-weight:700;color:var(--brand);list-style:none}
    details.tip summary::-webkit-details-marker{display:none}
    details.tip[open]{background:#fcfefc}

    .exercise .answer-line{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-top:12px}
    .small{font-size:.95rem;color:var(--muted)}

    .footer-action{text-align:center;margin-top:22px;padding:0 16px}
    .btn-voltar-aplicacoes{
      display:inline-block;padding:13px 24px;border-radius:10px;text-decoration:none;font-weight:700;transition:all .25s ease;
      box-shadow:0 2px 8px rgba(0,0,0,.06);background:#ffffff;color:var(--footer-green);border:2px solid var(--footer-green);margin-bottom:20px;
    }
    .btn-voltar-aplicacoes:hover{background:var(--footer-green);color:#ffffff;transform:translateY(-2px)}
    .rodape-oficial{background:var(--footer-green);color:#ffffff;text-align:center;padding:22px 16px;margin-top:0;border-top:1px solid #163828}
    .rodape-conteudo{max-width:980px;margin:0 auto}
    .rodape-conteudo p{margin:6px 0;font-size:.95rem;line-height:1.55}

    @media (max-width: 920px){
      .hero-grid,.grid-2,.two-col-steps{grid-template-columns:1fr}
      .grid-3{grid-template-columns:1fr}
      .grid-4{grid-template-columns:repeat(2,1fr)}
      .input-grid-3{grid-template-columns:1fr}
    }

    @media (max-width: 640px){
      .wrap{padding:14px}
      .input-grid,.grid-4{grid-template-columns:1fr}
      .panel,.exercise,.quote-box,.table-box{padding:18px}
      .hero-card{padding:18px}
      .btn{width:100%}
      .hero-actions .btn{justify-content:center}
      .btn-voltar-aplicacoes{width:100%;max-width:360px}
      .katex{font-size:0.98em}
      .formula-big .katex{font-size:1.08em}
      canvas.graph{min-height:220px}
    }
  

/* Ajustes MathJax */
.formula-block mjx-container[display="true"],
.result mjx-container[display="true"],
.step mjx-container[display="true"],
.proof-block mjx-container[display="true"],
.table-box mjx-container[display="true"],
.math-display mjx-container[display="true"]{
  display:block !important;
  overflow-x:auto;
  overflow-y:hidden;
  max-width:100%;
  padding:4px 2px;
  margin:.45em 0;
}
.formula-block mjx-container,
.result mjx-container,
.step mjx-container,
.proof-block mjx-container,
.table-box mjx-container,
.math-display mjx-container{
  max-width:100%;
}
.math-display{
  margin:10px 0;
  overflow-x:auto;
  overflow-y:visible;
  -webkit-overflow-scrolling:touch;
}
.math-inline mjx-container{
  display:inline-block !important;
}