:root{
  --bg:#f6f7fb;
  --card:#ffffff;
  --text:#111827;
  --muted:#4b5563;
  --border:rgba(17,24,39,.12);
  --accent:#2563eb;
  --accent2:#0ea5a8;
  --shadow:0 10px 30px rgba(17,24,39,.08);
  --radius:18px;
  --max:1100px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color:var(--text);
  background:var(--bg);
  line-height:1.55;
}
a{color:var(--accent); text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%; height:auto}
.container{max-width:var(--max); margin:0 auto; padding:0 18px}
.topbar{
  position:sticky; top:0; z-index:50;
  backdrop-filter:saturate(1.2) blur(10px);
  background:rgba(246,247,251,.75);
  border-bottom:1px solid var(--border);
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding:12px 0;
}
.brand{
  display:flex; gap:12px; align-items:center;
  font-weight:700; letter-spacing:.2px;
}
.brand-badge{
  width:36px; height:36px; border-radius:12px;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  box-shadow:var(--shadow);
}
.navlinks{display:flex; gap:14px; align-items:center; flex-wrap:wrap}
.navlinks a{
  padding:8px 10px;
  border-radius:12px;
  color:var(--text);
  font-weight:600;
  font-size:14px;
}
.navlinks a.active{
  background:rgba(37,99,235,.12);
  color:var(--accent);
}
.nav-toggle{
  display:none;
  border:1px solid var(--border);
  background:var(--card);
  border-radius:12px;
  padding:8px 10px;
  font-weight:700;
}
.hero{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--border);
  background:#0b1220;
}
.hero-bg{
  position:absolute; inset:0;
  background-image: url("../img/newheader.jpg");
  background-size:cover;
  background-position:center;
  opacity:.45;
  transform:scale(1.02);
}
.hero-overlay{
  position:absolute; inset:0;
  background:linear-gradient(180deg, rgba(11,18,32,.65), rgba(11,18,32,.82));
}
.hero-inner{
  position:relative;
  padding:54px 0 44px;
  color:#fff;
}
.hero h1{margin:0 0 8px; font-size:34px; line-height:1.15}
.hero p{margin:0; max-width:70ch; color:rgba(255,255,255,.85)}
.shell{padding:26px 0 60px}
.grid{
  display:grid;
  gap:18px;
  grid-template-columns: 320px 1fr;
  align-items:start;
}
.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.card.pad{padding:18px}
.sidebar .card.pad{position:sticky; top:88px}
.sidebar h3{margin:0 0 10px; font-size:16px}
.sidebar .side-content{color:var(--muted); font-size:14px}
.prose{
  font-size:16px;
}
.prose h1,.prose h2,.prose h3{line-height:1.2}
.prose h2{margin-top:22px}
.prose p{margin:10px 0}
.prose ul, .prose ol{padding-left:20px}
.prose blockquote{
  margin:16px 0;
  padding:14px 16px;
  border-left:4px solid rgba(14,165,168,.7);
  background:rgba(14,165,168,.06);
  border-radius:12px;
}
.prose table{
  width:100%;
  border-collapse:collapse;
  border:1px solid var(--border);
  border-radius:14px;
  overflow:hidden;
}
.prose th,.prose td{
  border-bottom:1px solid var(--border);
  padding:10px 12px;
  text-align:left;
  vertical-align:top;
}
.prose th{background:rgba(17,24,39,.04); font-size:14px}
.footer{
  padding:26px 0;
  border-top:1px solid var(--border);
  color:var(--muted);
  font-size:13px;
}
.texture{
  background-image:url("../img/dd1329_390c8ecb57424932bf17b0326414120e~mv2.avif");
  background-size:cover;
  background-position:center;
  border-radius:var(--radius);
  overflow:hidden;
}
.texture .inner{
  padding:18px;
  background:rgba(255,255,255,.82);
}
@media (max-width: 880px){
  .grid{grid-template-columns: 1fr}
  .sidebar .card.pad{position:relative; top:auto}
  .navlinks{display:none; width:100%; padding:10px 0}
  .navlinks.open{display:flex}
  .nav-toggle{display:inline-flex}
  .hero-inner{padding:40px 0 34px}
  .hero h1{font-size:28px}
}