:root{
    --navy:#001440;
    --blue:#0047AB;
    --teal:#00C9B1;
    --text:#fff;
    --text-2:rgba(255,255,255,.78);
    --border:rgba(255,255,255,.12);
    --surface:rgba(255,255,255,.06)
  }
  *{margin:0;padding:0;box-sizing:border-box}
  body{
    font-family:'DM Sans',sans-serif;
    background:var(--navy);
    color:var(--text);
    line-height:1.65;
    min-height:100vh
  }
  body::before{
    content:'';
    position:fixed;
    inset:0;
    z-index:-1;
    background:
      radial-gradient(ellipse at top,rgba(0,71,171,.55),transparent 60%),
      linear-gradient(180deg,#001440,#00091F)
  }

  /* ── Topbar ── */
  .topbar{
    position:sticky;
    top:0;
    background:rgba(0,15,45,.92);
    backdrop-filter:blur(20px);
    border-bottom:1px solid var(--border);
    padding:14px 20px;
    display:flex;
    align-items:center;
    gap:14px;
    z-index:10
  }
  .topbar a{color:#fff;text-decoration:none;font-weight:600}
  .topbar .back{
    width:36px;height:36px;border-radius:50%;
    background:var(--surface);
    display:flex;align-items:center;justify-content:center
  }

  /* Os ícones SVG são traçados a preto; invertemos para os
     tornar visíveis sobre o fundo escuro. */
  .back-icon{
    width:18px;height:18px;
    filter:brightness(0) invert(1)
  }

  /* ── Layout ── */
  main{max-width:780px;margin:0 auto;padding:32px 20px 80px}

  /* ── Hero ── */
  .hero{margin-bottom:32px}
  h1{
    font-family:'Syne',sans-serif;
    font-size:clamp(28px,5vw,42px);
    line-height:1.15;
    margin-bottom:6px
  }
  h1 span{color:var(--teal)}
  .meta{color:rgba(255,255,255,.42);font-size:13px;margin-bottom:0}

  /* ── Índice ── */
  .toc{
    background:var(--surface);
    border:1px solid var(--border);
    border-radius:18px;
    padding:20px 24px;
    margin:24px 0 32px
  }
  .toc-title{
    font-size:12px;
    font-weight:700;
    letter-spacing:.08em;
    text-transform:uppercase;
    color:var(--teal);
    margin-bottom:12px
  }
  .toc-grid{
    display:grid;
    grid-template-columns:repeat(auto-fill,minmax(200px,1fr));
    gap:4px 16px
  }
  .toc a{
    color:var(--text-2);
    text-decoration:none;
    font-size:14px;
    padding:5px 0;
    display:block;
    border-bottom:1px solid transparent;
    transition:color .2s,border-color .2s
  }
  .toc a:hover{color:var(--teal);border-color:rgba(0,201,177,.3)}

  /* ── Sections ── */
  section{margin-bottom:36px}
  h2{
    font-family:'Syne',sans-serif;
    font-size:20px;
    margin-bottom:14px;
    color:#fff;
    display:flex;
    align-items:center;
    gap:10px
  }
  h2::before{
    content:'';
    display:inline-block;
    width:3px;
    height:22px;
    background:var(--teal);
    border-radius:2px;
    flex-shrink:0
  }
  p{color:var(--text-2);font-size:15.5px;margin-bottom:10px}
  ul{margin:8px 0 0 0;list-style:none;display:flex;flex-direction:column;gap:8px}
  li{
    color:var(--text-2);
    font-size:15px;
    padding-left:20px;
    position:relative
  }
  li::before{
    content:'—';
    position:absolute;
    left:0;
    color:var(--teal);
    font-weight:700
  }

  /* ── Destaque de contacto ── */
  .contact-card{
    background:rgba(0,201,177,.08);
    border:1px solid rgba(0,201,177,.25);
    border-radius:16px;
    padding:20px 24px;
    margin-top:8px
  }
  .contact-card a{color:var(--teal);text-decoration:none;font-weight:600}
  .contact-card a:hover{text-decoration:underline}
  .contact-icon{
    width:16px;height:16px;
    display:inline-block;vertical-align:-3px;margin-right:6px;
    filter:brightness(0) saturate(100%) invert(72%) sepia(48%) saturate(1200%) hue-rotate(130deg) brightness(98%) contrast(92%)
  }

  footer{
    text-align:center;
    padding:30px 20px;
    color:rgba(255,255,255,.38);
    font-size:13px
  }
  footer a{color:inherit;text-decoration:none}
  footer a:hover{color:var(--teal)}