:root{
  --brand:#175FA5;
  --brand-2:#0B4C84;
  --accent:#E8F1FB;
  --text:#0f172a;
  --muted:#475569;
  --bg:#ffffff;
  --card:#ffffff;
  --ring:#cbd5e1;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,'Helvetica Neue',Arial,'Noto Sans',sans-serif;color:var(--text);background:var(--bg)}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1100px;margin:0 auto;padding:0 1rem}
header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,0.85);backdrop-filter:blur(6px);
  border-bottom:1px solid var(--ring);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.nav .brand{display:flex;gap:.5rem;align-items:center;font-weight:700}
.nav img{height:36px;width:36px;border-radius:999px}
.nav ul{display:flex;gap:1rem;list-style:none;margin:0;padding:0}
.nav a{padding:.4rem .6rem;border-radius:.6rem}
.nav a.active,.nav a:hover{background:var(--accent)}

.hero{background:url('../img/banner.png') center/cover no-repeat;min-height:420px;display:flex;align-items:center;justify-content:center}
.hero .overlay{background:rgba(0,0,0,.35);width:100%;height:100%;position:relative;display:flex;align-items:center;justify-content:center;padding:3rem 1rem}
.hero h1{color:#fff;font-size:2.4rem;margin:0;text-align:center;text-shadow:0 2px 18px rgba(0,0,0,.4)}
.hero p{color:#f1f5f9;text-align:center;max-width:840px;margin:.75rem auto 0}

.grid{display:grid;gap:1.25rem}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
@media (max-width:900px){
  .grid-3{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .grid-3,.grid-2{grid-template-columns:1fr}
  .nav ul{display:none}
}

.card{background:var(--card);border:1px solid var(--ring);border-radius:18px;overflow:hidden;box-shadow:0 1px 2px rgba(0,0,0,.03)}
.card .p{padding:1rem}
.badge{display:inline-block;padding:.25rem .55rem;background:var(--accent);border-radius:999px;font-size:.8rem;border:1px solid var(--ring);}
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.7rem 1rem;border:1px solid var(--ring);border-radius:12px;background:#fff;cursor:pointer;font-weight:600}
.btn.primary{background:var(--brand);color:#fff;border-color:transparent}
.btn:hover{filter:brightness(.98)}

section{padding:3rem 0}
section h2{margin:.2rem 0 1rem;font-size:1.75rem}
section .lead{color:var(--muted);margin-top:-.25rem}

.kolom{display:grid;grid-template-columns:280px 1fr;gap:1rem}
@media (max-width:900px){.kolom{grid-template-columns:1fr}}

.table{width:100%;border-collapse:collapse}
.table th,.table td{padding:.6rem .75rem;border-bottom:1px solid var(--ring);text-align:left}
.table th{background:var(--accent)}

.gallery{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.75rem}
@media (max-width:900px){.gallery{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.gallery{grid-template-columns:1fr}}
.gallery img{width:100%;height:220px;object-fit:cover;border-radius:14px;border:1px solid var(--ring)}

form .row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
@media (max-width:700px){form .row{grid-template-columns:1fr}}
label{display:block;font-weight:600;margin:.5rem 0 .35rem}
input,select,textarea{width:100%;padding:.7rem .8rem;border:1px solid var(--ring);border-radius:10px;outline:none}
input:focus,select:focus,textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(23,95,165,.15)}
.helper{font-size:.85rem;color:var(--muted)}

footer{padding:2rem 0;border-top:1px solid var(--ring);background:#fafafa}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:1rem}
@media (max-width:800px){.footer-grid{grid-template-columns:1fr}}

.notice{padding:1rem;border:1px dashed var(--ring);border-radius:12px;background:#f8fafc}