:root{
  --bg:#f7f9fc;
  --surface:#ffffff;
  --surface-alt:#eff3f9;
  --border:#e1e7f0;
  --ink:#0f1e3d;
  --ink-muted:#5c6b85;
  --ink-dim:#616e89;
  --accent:#0ca8be;
  --accent-deep:#076b7d;
  --accent-soft:#e1f7fa;
  --shadow-sm:0 1px 2px rgba(16,24,64,.05);
  --shadow-md:0 10px 30px -8px rgba(16,30,64,.14);
  --shadow-lg:0 24px 60px -16px rgba(16,30,64,.22);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg);color:var(--ink-muted);
  font-family:'IBM Plex Sans',-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
  line-height:1.65;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;}
::selection{background:var(--accent);color:#fff;}
.mono{font-family:'IBM Plex Mono',ui-monospace,"SF Mono","Cascadia Code","Roboto Mono",Menlo,Consolas,monospace;font-variant-numeric:tabular-nums;}
h1,h2,h3{color:var(--ink);margin:0;text-wrap:balance;font-weight:700;letter-spacing:-.015em;}
p{margin:0;}
:focus-visible{outline:2px solid var(--accent-deep);outline-offset:3px;border-radius:4px;}
@media (prefers-reduced-motion: reduce){ *{animation-duration:.01ms !important;transition-duration:.01ms !important;} html{scroll-behavior:auto;} }

.container{max-width:1160px;margin:0 auto;padding:0 2rem;}
section{padding:6rem 0;}

.btn{
  display:inline-flex;align-items:center;gap:.5rem;padding:.85rem 1.6rem;
  font-size:.94rem;font-weight:600;border-radius:10px;transition:all .2s;cursor:pointer;
}
.btn-solid{background:var(--ink);color:#fff;box-shadow:var(--shadow-sm);}
.btn-solid:hover{background:var(--accent-deep);transform:translateY(-1px);box-shadow:var(--shadow-md);}
.btn-ghost{background:var(--surface);color:var(--ink);border:1px solid var(--border);}
.btn-ghost:hover{border-color:var(--ink);}

/* ================= NAV ================= */
.navbar{position:sticky;top:0;z-index:100;background:rgba(247,249,252,.85);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);}
.navbar .container{display:flex;align-items:center;justify-content:space-between;padding:.9rem 2rem;}
.brand{display:flex;align-items:center;gap:.7rem;}
.brand-mark{width:38px;height:38px;object-fit:contain;}
.brand-name{color:var(--ink);font-weight:800;font-size:1.2rem;letter-spacing:-.01em;}
.nav-links{list-style:none;display:flex;gap:2.2rem;align-items:center;margin:0;padding:0;}
.nav-links a:not(.btn){font-size:.9rem;color:var(--ink-muted);font-weight:500;transition:color .2s;}
.nav-links a:not(.btn):hover{color:var(--ink);}
.hamburger{display:none;flex-direction:column;align-items:center;justify-content:center;gap:5px;width:44px;height:44px;background:none;border:0;cursor:pointer;padding:0;}
.hamburger span{width:20px;height:2px;background:var(--ink);border-radius:2px;transition:transform .25s,opacity .25s;}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.hamburger.open span:nth-child(2){opacity:0;}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ================= BREADCRUMB ================= */
.breadcrumb{padding:1.2rem 2rem 0;font-size:.85rem;color:var(--ink-dim);}
.breadcrumb a{color:var(--ink-dim);}
.breadcrumb a:hover{color:var(--accent-deep);}
.breadcrumb span{margin:0 .4rem;}
.breadcrumb .current{color:var(--ink-muted);}

.footer{border-top:1px solid var(--border);padding:3.2rem 0 1.8rem;}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:2rem;margin-bottom:2.2rem;}
.footer h4{color:var(--ink);font-size:.85rem;margin-bottom:.9rem;}
.footer p,.footer a{color:var(--ink-dim);font-size:.87rem;margin-bottom:.4rem;}
.footer a:hover{color:var(--accent-deep);}
.footer-bottom{border-top:1px solid var(--border);padding-top:1.6rem;font-size:.8rem;color:var(--ink-dim);display:flex;justify-content:space-between;flex-wrap:wrap;gap:.6rem;}

@media (max-width:860px){
  .nav-links{display:none;}
  .hamburger{display:flex;}
  section{padding:4rem 0;}
  .nav-links.mobile-open{
    display:flex;flex-direction:column;position:absolute;top:60px;left:0;right:0;
    background:var(--surface);border-bottom:1px solid var(--border);
    padding:1.4rem 2rem;gap:1.2rem;box-shadow:var(--shadow-lg);
  }
}

.skip-link{
  position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;
  padding:.75rem 1.25rem;font-weight:700;z-index:1000;border-radius:0 0 8px 0;
}
.skip-link:focus{left:0;}

<?php include __DIR__ . '/../../partials/guide.css.php'; ?>