/* Skip link (acessibilidade) */
        .skip-link { position: absolute; top: -40px; left: 0; background: #0A4D68; color: #fff; padding: 8px 16px; z-index: 9999; font-size: 14px; border-radius: 0 0 4px 0; transition: top .2s; text-decoration: none; }
        .skip-link:focus { top: 0; }
    :root {
      --primary: #0A4D68;
      --primary-dark: #06384d;
      --primary-light: #0e6b91;
      --accent: #047857;
      --accent-light: #059669;
      --secondary: #D97706;
      --bg-body: #F8FAFB;
      --bg-card: #FFFFFF;
      --bg-section: #F1F5F9;
      --text-main: #1C1917;
      --text-muted: #57534E;
      --text-light: #78716C;
      --border-subtle: #E2E8F0;
      --container-width: 1200px;
      --header-height: 90px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
      --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
      --shadow-lg: 0 16px 48px rgba(0,0,0,0.10);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
    }
    [data-theme="dark"] {
      --bg-body: #0C0A09;
      --bg-card: #1C1917;
      --bg-section: #151312;
      --text-main: #F5F5F4;
      --text-muted: #A8A29E;
      --text-light: #78716C;
      --primary: #38BDF8;
      --primary-light: #7DD3FC;
      --accent: #34D399;
      --accent-light: #6EE7B7;
      --border-subtle: #292524;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
      --shadow-md: 0 4px 16px rgba(0,0,0,0.3);
      --shadow-lg: 0 16px 48px rgba(0,0,0,0.4);
    }

    * { margin: 0; padding: 0; box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      font-family: 'Source Sans 3', system-ui, -apple-system, sans-serif;
      background-color: var(--bg-body);
      color: var(--text-main);
      line-height: 1.75;
      transition: background-color 0.4s ease, color 0.4s ease;
    }
    a { text-decoration: none; color: inherit; transition: 0.2s ease; }
    .container { max-width: var(--container-width); margin: 0 auto; padding: 0 24px; }
    .sr-only { position:absolute; left:-9999px; width:1px; height:1px; overflow:hidden; }

    /* --- TOPO E NAVEGAÇÃO --- */
    .top-bar { background-color: #0A4D68; color: #fff; padding: 8px 0; font-size: 0.85rem; }
    .top-bar .container { display: flex; justify-content: flex-end; gap: 20px; align-items: center; }
    
    .theme-toggle, .lang-selector select { 
      background: none; border: none; color: #fff; padding: 0; 
      cursor: pointer; display: flex; align-items: center; gap: 6px;
      font-family: inherit; font-size: 0.85rem;
    }
    .lang-selector select { padding-right: 15px; appearance: none; -webkit-appearance: none; }
    .lang-selector { display: flex; align-items: center; gap: 6px; }
    .lang-selector select option { background-color: #0A4D68; color: #fff; }

    .main-header {
      background-color: var(--bg-card); border-bottom: 1px solid var(--border-subtle);
      position: sticky; top: 0; z-index: 1000; height: var(--header-height);
      box-shadow: var(--shadow-sm);
    }
    .main-header .container { display: flex; justify-content: space-between; align-items: center; height: 100%; }
    
    .logo {
      font-family: 'Playfair Display', serif; font-size: 1.8rem; font-weight: 700;
      color: var(--primary); display: flex; align-items: center; gap: 12px;
    }
    
    .nav-menu { display: flex; gap: 28px; list-style: none; align-items: center; }
    .nav-link { font-weight: 700; color: var(--text-muted); text-transform: uppercase; font-size: 0.92rem; }
    .nav-link:hover, .nav-link.active { color: var(--primary); }
    
    .btn-outline {
      border: 2px solid var(--primary); color: var(--primary); padding: 8px 20px;
      border-radius: 999px; text-transform: uppercase; font-weight: 800; font-size: 0.85rem;
    }
    .btn-outline:hover { background: var(--primary); color: #fff; }

    /* Dropdown CSS */
    .nav-dropdown { position: relative; }
    .nav-dropdown-toggle {
        background: none; border: none; font-family: 'Source Sans 3', sans-serif;
        font-size: 0.92rem; font-weight: 700; color: var(--text-muted);
        cursor: pointer; display: inline-flex; align-items: center; gap: 4px;
        padding: 0; text-transform: uppercase;
    }
    .nav-dropdown-toggle:hover { color: var(--primary); }
    
    .dropdown-chevron { transition: transform 0.2s ease; }
    .nav-dropdown.open .dropdown-chevron { transform: rotate(180deg); }

    .nav-dropdown-menu {
        position: absolute; top: 100%; right: 0; min-width: 260px;
        background: var(--bg-card); border: 1px solid var(--border-subtle);
        border-radius: 12px; box-shadow: var(--shadow-md); padding: 10px 0;
        opacity: 0; visibility: hidden; transform: translateY(10px);
        transition: all 0.2s ease; z-index: 9000;
        margin-top: 10px;
    }
    .nav-dropdown.open .nav-dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }
    
    .dropdown-section-title {
        display: block; padding: 10px 20px 5px; font-size: 0.75rem;
        font-weight: 800; text-transform: uppercase; color: var(--text-light);
    }
    .dropdown-item {
        display: flex; align-items: center; gap: 10px; padding: 10px 20px;
        font-size: 0.9rem; color: var(--text-main); font-weight: 500;
    }
    .dropdown-item:hover { background: rgba(10, 77, 104, 0.05); color: var(--primary); }

    /* Breadcrumb */
    .breadcrumb-bar { background: var(--bg-section); border-bottom: 1px solid var(--border-subtle); padding: 12px 0; }
    .breadcrumb-list { list-style: none; display: flex; gap: 8px; font-size: 0.85rem; color: var(--text-light); }
    .breadcrumb-list a { color: var(--primary); font-weight: 600; }
    .breadcrumb-sep { opacity: 0.5; }

    /* --- PAGE HEADER --- */
    .page-header {
      padding: 48px 0 24px; text-align: center;
      background: linear-gradient(180deg, var(--bg-section) 0%, var(--bg-body) 100%);
    }
    .page-header h1 {
      font-family: 'Playfair Display', serif; font-weight: 800;
      font-size: clamp(2rem, 4vw, 3rem); color: var(--primary); margin-bottom: 16px;
    }
    .page-header .subtitle {
      font-size: 1.15rem; color: var(--text-muted); max-width: 750px; margin: 0 auto;
    }
    .trust-row {
      display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; margin-top: 24px;
    }
    .trust-pill {
      display: inline-flex; align-items: center; gap: 6px; padding: 6px 14px;
      border: 1px solid var(--border-subtle); border-radius: 999px;
      background: var(--bg-card); font-size: 0.85rem; font-weight: 700; color: var(--text-muted);
    }

    /* --- QR TOOL UI --- */
    .qr-container {
      display: flex; gap: 30px; max-width: 1000px; margin: 0 auto;
      flex-direction: row; align-items: stretch;
    }
    
    .qr-input-panel, .qr-preview-panel {
      background: var(--bg-card); border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg); box-shadow: var(--shadow-md);
      padding: 30px; flex: 1; display: flex; flex-direction: column;
    }

    .tool-label {
      font-size: 0.85rem; font-weight: 700; color: var(--text-muted);
      margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.05em; display: block;
    }

    .qr-text-input {
      width: 100%; padding: 14px; border: 2px solid var(--border-subtle);
      border-radius: var(--radius-sm); font-size: 1rem; color: var(--text-main);
      background: var(--bg-body); transition: border-color 0.2s;
      font-family: inherit; resize: vertical; min-height: 100px;
    }
    .qr-text-input:focus { border-color: var(--primary); outline: none; }

    .color-options {
      display: flex; gap: 12px; margin-top: 15px; align-items: center;
    }
    .color-input {
      border: none; padding: 0; width: 40px; height: 40px; 
      border-radius: 50%; cursor: pointer; background: none;
    }
    .color-input::-webkit-color-swatch-wrapper { padding: 0; }
    .color-input::-webkit-color-swatch { border: 2px solid var(--border-subtle); border-radius: 50%; }

    .action-btn {
      margin-top: 20px; width: 100%; background: var(--primary); color: #fff;
      border: none; padding: 14px; border-radius: 999px; font-weight: 800;
      font-size: 1rem; cursor: pointer; display: flex; justify-content: center;
      align-items: center; gap: 8px; transition: background 0.2s;
    }
    .action-btn:hover { background: var(--primary-dark); }
    
    .download-btn {
      margin-top: 15px; background: var(--bg-body); color: var(--text-main);
      border: 2px solid var(--border-subtle);
    }
    .download-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--bg-card); }
    .download-btn[disabled] { opacity: 0.5; cursor: not-allowed; }

    .qr-display-area {
      flex-grow: 1; display: flex; align-items: center; justify-content: center;
      background: var(--bg-section); border-radius: var(--radius-sm);
      min-height: 300px; border: 1px dashed var(--border-subtle);
      position: relative; overflow: hidden;
    }
    #qrcode img { max-width: 100%; height: auto; }
    
    .qr-placeholder {
      text-align: center; color: var(--text-light); font-size: 0.9rem;
    }

    /* --- CONTEÚDO EDUCATIVO --- */
    .content-area { max-width: 800px; margin: 50px auto; padding: 0 20px; }
    .content-block h2 {
      font-family: 'Playfair Display', serif; font-size: 1.8rem; margin-bottom: 16px;
      color: var(--text-main); border-bottom: 2px solid var(--secondary); display: inline-block;
      padding-bottom: 4px;
    }
    .content-block p { color: var(--text-muted); font-size: 1.05rem; margin-bottom: 20px; }
    .content-block ul { margin-left: 20px; margin-bottom: 20px; color: var(--text-muted); }
    .content-block li { margin-bottom: 8px; }
    
    .info-box {
        background: var(--bg-section); border-left: 4px solid var(--accent);
        padding: 20px; border-radius: 0 8px 8px 0; margin: 30px 0;
    }

    /* --- FOOTER --- */
    footer { background: #1C1917; color: #A8A29E; padding: 60px 0 20px; margin-top: 60px; font-size: 0.95rem; }
    .footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 40px; margin-bottom: 40px; }
    .footer h4 { color: #fff; font-family: 'Playfair Display', serif; margin-bottom: 20px; }
    .footer ul { list-style: none; }
    .footer ul li { margin-bottom: 10px; }
    .footer ul li a:hover { color: #fff; }
    .footer-bottom { border-top: 1px solid #333; padding-top: 20px; text-align: center; font-size: 0.85rem; }

    @media (max-width: 800px) {
      .nav-menu { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
      .qr-container { flex-direction: column; }
      .page-header h1 { font-size: 2rem; }
    }