*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

    :root {
      --bg: #F4F7FB;
      --surface: #FFFFFF;
      --ink: #0A0F1C;
      --ink-soft: #334155;
      --ink-muted: #94A3B8;
      --accent: #1E3A8A;
      --accent-light: #3B5BDB;
      --line: #E2E8F0;
      --warm: #EEF2FF;
      --gold: #C7A94F;
      --purple: #1E3A8A;
      --purple-bg: #E8EDFF;
      --teal: #1E3A8A;
      --teal-bg: #E8EDFF;
      --amber: #1E3A8A;
      --amber-bg: #E8EDFF;
      --green: #1E3A8A;
      --green-bg: #E8EDFF;
      --coral: #1E3A8A;
      --coral-bg: #E8EDFF;
      --blue: #1E3A8A;
      --blue-bg: #E8EDFF;
      --radius: 12px;
      --font-display: 'Playfair Display', Georgia, serif;
      --font-body: 'DM Sans', sans-serif;
    }

    body {
      background: var(--bg);
      color: var(--ink);
      font-family: var(--font-body);
      min-height: 100vh;
      padding: 0;
    }

    header {
      background: var(--accent);
      color: #fff;
      padding: 28px 48px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 3px solid var(--gold);
    }

    .logo { display: flex; align-items: baseline; gap: 10px; }
    .logo-mark { font-family: var(--font-display); font-size: 28px; font-weight: 700; letter-spacing: -0.5px; color: #fff; }
    .logo-tag { font-size: 11px; font-weight: 500; letter-spacing: 2px; text-transform: uppercase; color: rgba(255,255,255,0.55); }
    .header-meta { font-size: 13px; color: rgba(255,255,255,0.6); font-weight: 300; }

    .hero {
      background: var(--surface);
      border-bottom: 1px solid var(--line);
      padding: 40px 48px 36px;
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 24px;
    }
    .hero h1 { font-family: var(--font-display); font-size: 42px; font-weight: 700; color: var(--ink); line-height: 1.1; max-width: 480px; }
    .hero h1 span { color: var(--accent); }
    .hero-desc { max-width: 300px; font-size: 14px; color: var(--ink-soft); line-height: 1.7; font-weight: 300; }

    .stats { background: var(--accent); display: flex; gap: 0; overflow: hidden; }
    .stat { flex: 1; padding: 18px 28px; border-right: 1px solid rgba(255,255,255,0.1); text-align: center; }
    .stat:last-child { border-right: none; }
    .stat-num { font-family: var(--font-display); font-size: 28px; font-weight: 700; color: #fff; display: block; }
    .stat-label { font-size: 11px; color: rgba(255,255,255,0.5); font-weight: 400; letter-spacing: 0.5px; text-transform: uppercase; }

    main { padding: 40px 48px; max-width: 1200px; margin: 0 auto; }

    .section-header { display: flex; align-items: baseline; gap: 16px; margin-bottom: 24px; }
    .section-title { font-family: var(--font-display); font-size: 22px; font-weight: 700; color: var(--ink); }
    .section-line { flex: 1; height: 1px; background: var(--line); }

    .modules {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-bottom: 48px;
    }

    .module-card {
      background: var(--surface);
      border-radius: var(--radius);
      border: 1px solid var(--line);
      overflow: hidden;
      cursor: pointer;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      position: relative;
    }
    .module-card:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(0,0,0,0.08); }
    .module-card.active { border-color: transparent; box-shadow: 0 0 0 2px var(--accent), 0 12px 32px rgba(0,0,0,0.1); }

    .module-header { padding: 22px 24px 16px; display: flex; align-items: center; gap: 14px; }
    .module-icon { width: 42px; height: 42px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 20px; flex-shrink: 0; }
    .module-name { font-family: var(--font-display); font-size: 18px; font-weight: 700; line-height: 1.2; }
    .module-sub { font-size: 12px; font-weight: 400; margin-top: 2px; }
    .module-body { padding: 0 24px 20px; }
    .module-desc { font-size: 13px; color: var(--ink-soft); line-height: 1.6; font-weight: 300; margin-bottom: 14px; }
    .module-features { list-style: none; display: flex; flex-direction: column; gap: 6px; }
    .module-features li { font-size: 12px; color: var(--ink-soft); display: flex; align-items: center; gap: 8px; font-weight: 400; }
    .module-features li::before { content: ''; width: 4px; height: 4px; border-radius: 50%; background: var(--ink-muted); flex-shrink: 0; }
    .module-footer { padding: 12px 24px; border-top: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; }

    .badge { font-size: 10px; font-weight: 500; letter-spacing: 0.5px; text-transform: uppercase; padding: 3px 10px; border-radius: 20px; }
    .btn-link { font-size: 12px; font-weight: 500; color: var(--accent); background: none; border: none; cursor: pointer; padding: 0; display: flex; align-items: center; gap: 4px; transition: gap 0.15s; }
    .btn-link:hover { gap: 8px; }

    /* Color variants */
    .mod-acervo .module-icon  { background: var(--teal-bg); }
    .mod-acervo .module-name  { color: var(--teal); }
    .mod-acervo .module-sub   { color: var(--accent-light); }
    .mod-acervo .badge        { background: var(--teal-bg); color: var(--teal); }

    .mod-conta .module-icon { background: var(--blue-bg); }
    .mod-conta .module-name { color: var(--blue); }
    .mod-conta .module-sub  { color: #3A6AB5; }
    .mod-conta .badge       { background: var(--blue-bg); color: var(--blue); }

    .mod-emprestimos .module-icon { background: var(--amber-bg); }
    .mod-emprestimos .module-name { color: var(--amber); }
    .mod-emprestimos .module-sub  { color: #A07030; }
    .mod-emprestimos .badge       { background: var(--amber-bg); color: var(--amber); }

    .mod-busca .module-icon { background: var(--purple-bg); }
    .mod-busca .module-name { color: var(--purple); }
    .mod-busca .module-sub  { color: #5C529A; }
    .mod-busca .badge       { background: var(--purple-bg); color: var(--purple); }

    /* Flow */
    .flow-section { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px 36px; margin-bottom: 48px; }
    .flow-title { font-family: var(--font-display); font-size: 16px; font-weight: 700; color: var(--ink); margin-bottom: 28px; }
    .flow-steps { display: flex; align-items: center; gap: 0; overflow-x: auto; padding-bottom: 4px; }
    .flow-step { display: flex; flex-direction: column; align-items: center; gap: 10px; min-width: 110px; text-align: center; position: relative; }
    .flow-circle { width: 52px; height: 52px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 700; font-family: var(--font-display); border: 2px solid currentColor; background: var(--surface); z-index: 1; }
    .flow-step-name { font-size: 12px; font-weight: 500; color: var(--ink-soft); line-height: 1.3; }
    .flow-arrow { flex: 1; height: 2px; background: var(--line); position: relative; top: -18px; min-width: 24px; }
    .flow-arrow::after { content: ''; position: absolute; right: -1px; top: -4px; width: 0; height: 0; border-top: 5px solid transparent; border-bottom: 5px solid transparent; border-left: 8px solid var(--line); }

    /* Bottom grid */
    .bottom-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 20px; }
    .info-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 32px; }
    .info-card-title { font-family: var(--font-display); font-size: 16px; font-weight: 700; color: var(--ink); margin-bottom: 18px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
    .tech-list { display: flex; flex-direction: column; gap: 10px; }
    .tech-row { display: flex; align-items: center; justify-content: space-between; font-size: 13px; }
    .tech-name { color: var(--ink-soft); font-weight: 400; }
    .tech-pill { background: var(--warm); color: var(--accent); font-size: 11px; font-weight: 500; padding: 3px 10px; border-radius: 20px; }
    .tip-list { display: flex; flex-direction: column; gap: 12px; }
    .tip { display: flex; gap: 12px; align-items: flex-start; }
    .tip-num { width: 22px; height: 22px; border-radius: 50%; background: var(--accent); color: #fff; font-size: 11px; font-weight: 500; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px; }
    .tip-text { font-size: 13px; color: var(--ink-soft); line-height: 1.5; font-weight: 300; }

    footer { margin-top: 48px; border-top: 1px solid var(--line); padding: 24px 48px; display: flex; justify-content: space-between; align-items: center; background: var(--surface); font-size: 12px; color: var(--ink-muted); }

    /* Animations */
    .module-card { animation: fadeUp 0.4s ease both; }
    .module-card:nth-child(1) { animation-delay: 0.05s; }
    .module-card:nth-child(2) { animation-delay: 0.10s; }
    .module-card:nth-child(3) { animation-delay: 0.15s; }
    .module-card:nth-child(4) { animation-delay: 0.20s; }

    @keyframes fadeUp {
      from { opacity: 0; transform: translateY(16px); }
      to   { opacity: 1; transform: translateY(0); }
    }

    @media (max-width: 900px) {
      header { padding: 20px 24px; }
      .hero  { padding: 28px 24px; flex-direction: column; align-items: flex-start; }
      main   { padding: 28px 24px; }
      .modules { grid-template-columns: 1fr 1fr; }
      .bottom-grid { grid-template-columns: 1fr; }
      .hero h1 { font-size: 30px; }
    }
    @media (max-width: 600px) {
      .modules { grid-template-columns: 1fr; }
      .stats   { flex-wrap: wrap; }
    }