/* =========================
       Techlark — Single Page SPA
       Mobile-first, performance-optimized, no external libraries
       ========================= */

    :root{
      --bg: #0B0D12;
      --bg2:#0E1119;
      --card:#0F1420;
      --text:#E9ECF3;
      --muted:#B7BECE;
      --faint:#7E879B;
      --line: rgba(233,236,243,.12);
      --line2: rgba(233,236,243,.18);
      --accent:#C6B48A; /* warm strategic-gold */
      --accent2:#9AD7FF; /* cool technical */
      --shadow: 0 14px 40px rgba(0,0,0,.45);
      --radius: 18px;
      --max: 1120px;

      --serif: ui-serif, "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
      --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
    }

    *{ box-sizing:border-box; }
    html{ scroll-behavior:smooth; }
    body{
      margin:0;
      font-family: var(--sans);
      background:
        radial-gradient(1200px 800px at 10% -20%, rgba(154,215,255,.10), transparent 55%),
        radial-gradient(900px 600px at 90% 0%, rgba(198,180,138,.10), transparent 55%),
        linear-gradient(180deg, var(--bg), var(--bg2) 60%, var(--bg));
      color: var(--text);
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

    a{ color:inherit; text-decoration:none; }

    /* Equal left/right spacing: padding so centering is consistent (avoids scrollbar asymmetry) */
    .container{
      max-width: var(--max);
      width: 100%;
      margin: 0 auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    @media (max-width: 600px){
      .container{
        padding-left: 16px;
        padding-right: 16px;
      }
    }

    /* Sticky nav */
    .nav{
      position: sticky;
      top:0;
      z-index: 50;
      backdrop-filter: blur(10px);
      background: linear-gradient(180deg, rgba(11,13,18,.78), rgba(11,13,18,.55));
      border-bottom: 1px solid var(--line);
    }
    .nav-inner{
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding: 14px 0;
      gap: 12px;
      min-height: 0;
    }

    /* Brand (inline SVG wordmark + mark) */
    .brand{
      display:flex;
      align-items:center;
      gap: 10px;
      min-width: 0;
      flex: 1 1 auto;
    }
    .brand .wordmark{
      display:flex;
      flex-direction:column;
      line-height: 1.2;
    }
    .brand .wordmark b{
      font-family: var(--serif);
      letter-spacing: .2px;
      font-size: 15.5px;
      font-weight: 650;
    }
    .brand .wordmark span{
      font-size: 12px;
      color: var(--muted);
      letter-spacing:.14em;
      text-transform: uppercase;
    }

    .nav-links{
      display:none;
      gap: 18px;
      align-items:center;
      color: var(--muted);
      font-size: 13.5px;
      letter-spacing:.02em;
    }
    .nav-links a{
      padding: 10px 10px;
      border-radius: 999px;
      border: 1px solid transparent;
      transition: all .18s ease;
    }
    .nav-links a:hover{
      color: var(--text);
      border-color: var(--line);
      background: rgba(233,236,243,.04);
    }
    .nav-links a.active{
      color: var(--text);
      border-color: rgba(198,180,138,.35);
      background: rgba(198,180,138,.08);
    }

    .nav-cta{
      display:flex;
      align-items:center;
      gap: 10px;
      flex-shrink: 0;
    }

    .pill{
      display:inline-flex;
      align-items:center;
      gap: 8px;
      padding: 10px 12px;
      border-radius: 999px;
      border: 1px solid var(--line);
      background: rgba(233,236,243,.03);
      color: var(--muted);
      font-size: 12.5px;
      white-space:nowrap;
    }
    .dot{
      width:8px;height:8px;border-radius:999px;
      background: var(--accent);
      box-shadow: 0 0 0 4px rgba(198,180,138,.14);
      flex: 0 0 auto;
    }

    /* Mobile menu */
    .menu-btn{
      width: 42px;
      height: 42px;
      border-radius: 12px;
      border: 1px solid var(--line);
      background: rgba(233,236,243,.03);
      display:inline-grid;
      place-items:center;
      cursor:pointer;
      transition: transform .12s ease, background .18s ease;
    }
    .menu-btn:hover{ background: rgba(233,236,243,.06); }
    .menu-btn:active{ transform: scale(.98); }

    .mobile-drawer{
      display:none;
      border-top: 1px solid var(--line);
      padding: 10px 0 16px;
    }
    .mobile-drawer a{
      display:flex;
      justify-content:space-between;
      align-items:center;
      padding: 12px 10px;
      border-radius: 12px;
      color: var(--muted);
      border: 1px solid transparent;
    }
    .mobile-drawer a:hover{
      border-color: var(--line);
      background: rgba(233,236,243,.03);
      color: var(--text);
    }
    .chev{ opacity:.6; }

    /* Sections */
    section{ padding: 76px 0; }
    .kicker{
      color: var(--muted);
      font-size: 12px;
      letter-spacing: .22em;
      text-transform: uppercase;
      margin: 0 0 12px 0;
    }
    h1,h2{
      font-family: var(--serif);
      font-weight: 650;
      margin: 0;
      letter-spacing: .2px;
    }
    h1{
      font-size: clamp(34px, 6.3vw, 58px);
      line-height: 1.02;
    }
    h2{
      font-size: clamp(26px, 4.5vw, 40px);
      line-height: 1.12;
    }
    .lead{
      color: var(--muted);
      font-size: 16.5px;
      line-height: 1.75;
      margin-top: 14px;
      max-width: 70ch;
    }

    /* Hero layout */
    .hero{
      padding-top: 44px;
    }
    .hero-grid{
      display:grid;
      gap: 22px;
      align-items: start;
    }

    .hero-card{
      border-radius: var(--radius);
      border: 1px solid var(--line);
      background: linear-gradient(180deg, rgba(15,20,32,.72), rgba(15,20,32,.36));
      box-shadow: var(--shadow);
      overflow:hidden;
    }
    .hero-card .pad{ padding: 18px 18px 16px; }
    .hero-card .meta{
      display:flex;
      flex-wrap:wrap;
      gap: 10px;
      margin-top: 14px;
    }

    .mini{
      padding: 10px 12px;
      border-radius: 14px;
      border: 1px solid var(--line);
      background: rgba(233,236,243,.03);
      color: var(--muted);
      font-size: 12.5px;
      line-height:1.35;
      min-width: 140px;
    }
    .mini b{ color: var(--text); font-weight: 600; }
    .hero-diagram{
      border-top: 1px solid var(--line);
      background:
        radial-gradient(650px 260px at 30% 40%, rgba(154,215,255,.12), transparent 60%),
        radial-gradient(500px 300px at 75% 55%, rgba(198,180,138,.10), transparent 60%),
        linear-gradient(180deg, rgba(11,13,18,.1), rgba(11,13,18,.35));
      padding: 16px;
    }

    /* Content grid cards */
    .grid{
      display:grid;
      gap: 14px;
      margin-top: 20px;
    }
    .card{
      border-radius: var(--radius);
      border: 1px solid var(--line);
      background: rgba(15,20,32,.40);
      padding: 18px;
    }
    .card p{
      margin: 10px 0 0;
      color: var(--muted);
      line-height: 1.75;
      font-size: 15.5px;
    }
    .card h3{
      font-family: var(--serif);
      margin: 0;
      font-size: 18px;
      font-weight: 650;
      letter-spacing:.2px;
    }
    .split{
      display:grid;
      gap: 14px;
      margin-top: 20px;
    }

    /* Lists */
    ul.clean{
      list-style:none;
      padding:0;
      margin: 12px 0 0;
      display:grid;
      gap: 10px;
    }
    .bullet{
      display:flex;
      gap: 10px;
      align-items:flex-start;
      color: var(--muted);
      line-height:1.65;
      font-size: 15.5px;
    }
    .bullet .mark{
      width: 10px; height:10px; margin-top: 7px;
      border-radius: 999px;
      background: linear-gradient(180deg, var(--accent), rgba(198,180,138,.45));
      box-shadow: 0 0 0 4px rgba(198,180,138,.12);
      flex: 0 0 auto;
    }

    /* Diagram placeholder frame */
    .diagram-frame{
      border-radius: 16px;
      border: 1px dashed rgba(233,236,243,.22);
      background: rgba(233,236,243,.02);
      padding: 14px;
      overflow:hidden;
    }
    .shot{
      width: 100%;
      height: auto;
      display: block;
      border-radius: 12px;
      border: 1px solid rgba(233,236,243,.14);
      background: rgba(0,0,0,.18);
    }
    .diagram-caption{
      display:flex;
      justify-content:space-between;
      align-items:center;
      gap: 10px;
      margin-top: 10px;
      color: var(--faint);
      font-size: 12.5px;
    }
    code.tag{
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono","Courier New", monospace;
      font-size: 12px;
      padding: 4px 8px;
      border-radius: 999px;
      border: 1px solid var(--line);
      background: rgba(233,236,243,.03);
      color: var(--muted);
      white-space:nowrap;
    }

    /* Footer */
    footer{
      padding: 34px 0 48px;
      border-top: 1px solid var(--line);
      background: rgba(11,13,18,.42);
    }
    .footer-grid{
      display:grid;
      gap: 16px;
      align-items:start;
    }
    .legal{
      color: var(--faint);
      font-size: 12.5px;
      line-height: 1.6;
    }

    /* Small mobile: simplify header to prevent cramping */
    @media (max-width: 480px){
      .nav-cta .pill{ display: none; }
      .brand .wordmark b{ font-size: 14px; }
      .brand .wordmark span{ font-size: 11px; }
      .brand svg{ width: 28px; height: 28px; }
      section{ padding: 52px 0; }
      .hero{ padding-top: 32px; }
    }

    /* Responsive */
    @media (min-width: 880px){
      .nav-links{ display:flex; }
      .menu-btn, .mobile-drawer{ display:none !important; }
      .hero-grid{
        grid-template-columns: 1.22fr .78fr;
        gap: 18px;
        align-items: stretch;
      }
      .split{
        grid-template-columns: 1fr 1fr;
      }
      .grid{
        grid-template-columns: 1fr 1fr;
      }
      section{ padding: 96px 0; }
      .hero{ padding-top: 54px; }
    }

    /* Reduce motion */
    @media (prefers-reduced-motion: reduce){
      html{ scroll-behavior:auto; }
      *{ transition:none !important; animation:none !important; }
    }

    /* Small utilities (kept minimal to remove inline styles) */
    .kicker--tight{ margin: 0 0 10px 0; }
    .u-m0{ margin: 0; }
    .u-mt10{ margin-top: 10px; }
    .u-mt14{ margin-top: 14px; }
    .u-mt20{ margin-top: 20px; }