@font-face {
    font-family: 'Anton';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url('fonts/anton.woff2') format('woff2');
  }
  @font-face {
    font-family: 'Archivo';
    font-style: normal;
    font-weight: 100 900;
    font-display: swap;
    src: url('fonts/archivo.woff2') format('woff2');
  }

  :root{
    color-scheme: dark;
    --bg:        #0a0b0e;
    --bg-alt:    #111318;
    --surface:   #16191f;
    --surface-2: #1c2028;
    --border:    rgba(255,255,255,.08);
    --ink:       #FFFFFF;
    --ink-soft:  #9CA3AF;
    --ink-faint: #6B7280;
    --accent:    #8B3FE8;
    --accent-2:  #A66BF0;
    --accent-ink:#0a0b0e;
    --good:      #10E07A;
    --shadow:    0 20px 50px rgba(0,0,0,.45);

    --font-display: 'Anton', 'Arial Narrow', sans-serif;
    --font-body: 'Archivo', 'Helvetica Neue', Arial, sans-serif;
  }

  *,*::before,*::after{ box-sizing:border-box; }
  html{ scroll-behavior:smooth; }
  @media (prefers-reduced-motion: reduce){ html{ scroll-behavior:auto; } }

  body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:var(--font-body);
    font-size:16px;
    line-height:1.65;
    -webkit-font-smoothing:antialiased;
  }
  a{ color:var(--accent); }
  ::selection{ background:var(--accent); color:var(--accent-ink); }

  h1,h2,h3{
    font-family:var(--font-display);
    font-weight:400;
    text-transform:uppercase;
    letter-spacing:.01em;
    line-height:1.02;
    text-wrap:balance;
    margin:0;
  }

  /* ── Header ── */
  header.top{
    position:sticky; top:0; z-index:40;
    backdrop-filter:blur(14px) saturate(140%);
    background:rgba(10,11,14,.85);
    border-bottom:1px solid var(--border);
  }
  .top-inner{
    max-width:1180px; margin:0 auto; padding:16px 24px;
    display:flex; align-items:center; justify-content:space-between; gap:20px;
  }
  .logo{
    font-family:var(--font-display); font-size:20px; letter-spacing:.03em;
    color:var(--ink); text-decoration:none; display:flex; align-items:center; gap:8px;
  }
  .logo .dot{ width:8px; height:8px; border-radius:50%; background:var(--accent); }
  .top-right{ display:flex; align-items:center; gap:18px; }
  .top-right a{ font-size:13px; font-weight:700; text-decoration:none; color:var(--ink-soft); }
  .top-right a:hover{ color:var(--accent); }
  .btn-mini{
    font-family:var(--font-body); font-weight:800; font-size:13px;
    background:linear-gradient(180deg,var(--accent),var(--accent-2)); color:var(--accent-ink) !important;
    padding:9px 16px; border-radius:7px; text-decoration:none !important;
  }
  .btn-mini.lg{ padding:12px 22px; font-size:14px; }

  /* ── Intro ── */
  .intro{ max-width:1180px; margin:0 auto; padding:56px 24px 40px; }
  .eyebrow{
    font-weight:800; font-size:12px; letter-spacing:.16em; text-transform:uppercase;
    color:var(--accent); margin:0 0 14px; display:flex; align-items:center; gap:10px;
  }
  .eyebrow::before{ content:""; width:22px; height:2px; background:var(--accent); }
  .intro h1{ font-size:clamp(32px,5vw,52px); margin-bottom:18px; max-width:16ch; }
  .intro p{ color:var(--ink-soft); font-size:17px; max-width:62ch; margin:0; }

  /* ── Layout: sidebar + content ── */
  .layout{
    max-width:1180px; margin:0 auto; padding:0 24px 100px;
    display:grid; grid-template-columns:220px 1fr; gap:56px;
    align-items:start;
  }
  @media (max-width:860px){ .layout{ grid-template-columns:1fr; } .toc{ position:static !important; } }

  .toc{
    position:sticky; top:88px;
    display:flex; flex-direction:column; gap:4px;
    border-left:1px solid var(--border);
    padding-left:18px;
  }
  .toc a{
    font-size:13px; font-weight:700; color:var(--ink-faint); text-decoration:none;
    padding:7px 0; transition:color .15s;
  }
  .toc a:hover, .toc a.active{ color:var(--accent); }

  .content{ min-width:0; }

  .cat{ margin-bottom:64px; scroll-margin-top:90px; }
  .cat-head{ display:flex; align-items:baseline; gap:14px; margin-bottom:8px; padding-bottom:14px; border-bottom:1px solid var(--border); }
  .cat-head .ic{ font-size:22px; }
  .cat-head h2{ font-size:clamp(22px,3vw,32px); }
  .cat-sub{ color:var(--ink-faint); font-size:14px; margin:0 0 28px; max-width:60ch; }

  .feat{ padding:26px 0; border-bottom:1px solid var(--border); }
  .feat:last-child{ border-bottom:none; }
  .feat h3{
    font-family:var(--font-body); font-weight:800; text-transform:none;
    font-size:17px; letter-spacing:0; margin-bottom:8px; color:var(--ink);
  }
  .feat p{ margin:0; color:var(--ink-soft); font-size:14.5px; max-width:68ch; }
  .feat .tag{
    display:inline-block; font-size:10.5px; font-weight:800; letter-spacing:.06em; text-transform:uppercase;
    color:var(--accent); background:rgba(139,63,232,.12); border-radius:100px; padding:3px 10px; margin-bottom:10px;
  }

  .final{
    margin-top:40px; padding:36px; border-radius:14px;
    background:linear-gradient(180deg, rgba(139,63,232,.08), transparent 60%), var(--surface);
    border:1px solid var(--border); box-shadow:var(--shadow); text-align:center;
  }
  .final h2{ font-size:26px; margin-bottom:10px; }
  .final p{ color:var(--ink-soft); margin:0 0 20px; }

  footer{ padding:32px 0; text-align:center; color:var(--ink-faint); font-size:12.5px; border-top:1px solid var(--border); }