*{ box-sizing:border-box; }

html,body{
  margin:0;
  padding:0;
}

body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.65;
  color:var(--text);
  background:var(--bg);
}

h1,h2,h3,h4{
  font-family:var(--font-heading);
  margin:0 0 0.5em 0;
  line-height:1.25;
}

h1{ font-size:2.6rem; }
h2{ font-size:1.9rem; }
h3{ font-size:1.3rem; }
h4{ font-size:1.05rem; }

p{ margin:0 0 1em 0; }

a{
  color:var(--std-blue);
  text-decoration:none;
}

a:hover{ text-decoration:underline; }

img, svg{ max-width:100%; }

ul, ol{ padding-left:1.4em; }
li{ margin-bottom:6px; }

code{
  background:#EFEFF1;
  border:1px solid var(--border);
  border-radius:4px;
  padding:1px 6px;
  font-family: Consolas, "Courier New", monospace;
  font-size:0.92em;
  color:#3a3a3d;
}

.container{
  max-width:var(--max-width);
  margin:0 auto;
  padding:0 24px;
}

.section{
  padding:64px 0;
}

.section-alt{
  /* Soft brand tint so alternating sections read as distinct bands (the plain .section shows the
     near-white body bg, so a pure-white alt was effectively invisible). Cards stay white on top of this. */
  background:#EAF2FA;
}

.text-center{ text-align:center; }
.text-muted{ color:var(--text-muted); }

.visually-hidden{
  position:absolute;
  left:-9999px;
}

/* ---------- Site header ---------- */
.site-header{
  background:var(--card-bg);
  border-bottom:1px solid var(--border);
  position:sticky;
  top:0;
  z-index:100;
}

.site-header .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:72px;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:var(--text);
}

.brand:hover{ text-decoration:none; }

.brand-logo{
  width:40px;
  height:40px;
  flex-shrink:0;
}

.brand-text h1{
  font-size:1.25rem;
  margin:0;
  color:var(--std-navy);
}

.brand-text .tagline{
  font-size:0.7rem;
  color:var(--text-muted);
  letter-spacing:0.3px;
}

.main-nav{
  display:flex;
  align-items:center;
  gap:28px;
}

.main-nav a{
  color:var(--text);
  font-size:0.95rem;
  font-weight:500;
}

.main-nav a.active{
  color:var(--std-navy);
  font-weight:700;
}

.nav-toggle{
  display:none;
  background:none;
  border:1px solid var(--border);
  border-radius:6px;
  padding:8px 12px;
  font-size:0.9rem;
  cursor:pointer;
}

/* ---------- Site footer ---------- */
.site-footer{
  background:var(--std-navy);
  color:#D7E4EE;
  padding:48px 0 28px 0;
  margin-top:64px;
}

.site-footer a{
  color:#D7E4EE;
}

.footer-grid{
  display:grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap:32px;
  margin-bottom:32px;
}

.footer-grid h4{
  color:#FFFFFF;
  margin-bottom:0.8em;
}

.footer-grid ul{
  list-style:none;
  padding-left:0;
}

.footer-grid li{
  margin-bottom:6px;
  font-size:0.92rem;
}

.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.15);
  padding-top:18px;
  font-size:0.82rem;
  color:#AFC4D4;
  text-align:center;
}

/* ---------- Responsive ---------- */
@media (max-width: 800px){
  h1{ font-size:2rem; }
  h2{ font-size:1.5rem; }

  .main-nav{
    position:absolute;
    top:72px;
    left:0;
    right:0;
    background:var(--card-bg);
    border-bottom:1px solid var(--border);
    flex-direction:column;
    align-items:flex-start;
    gap:0;
    padding:8px 24px 16px 24px;
    display:none;
  }

  .main-nav.open{
    display:flex;
  }

  .main-nav a{
    padding:10px 0;
    width:100%;
  }

  .nav-toggle{
    display:inline-block;
  }

  .footer-grid{
    grid-template-columns:1fr;
    gap:24px;
  }
}