:root{--cb:#0b3d91;--cb-gelap:#082c69;--kertas:#f8fafc;--tinta:#0f172a;--pensil:#f59e0b;--abu:#475569;--garis:#cbd5e1;--muda:#e8eef8}
*,*::before,*::after{box-sizing:border-box;border-radius:0}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--kertas);color:var(--tinta);font-family:"Chivo",system-ui,sans-serif;font-size:17px;line-height:1.68}
img{max-width:100%;height:auto;display:block}
a{color:var(--cb);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:#b45309}
.mono{font-family:"Courier Prime",ui-monospace,monospace}

/* kepala: latar biru dengan grid putih */
.atap{background-color:var(--cb);background-image:linear-gradient(rgba(255,255,255,.13) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.13) 1px,transparent 1px);background-size:24px 24px;color:#fff;border-bottom:3px solid var(--pensil)}
.atap-baris{max-width:1160px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.cap{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:800;font-size:20px;letter-spacing:.02em;min-height:44px}
.cap img{width:36px;height:36px;border:1px solid rgba(255,255,255,.7)}
.cap small{display:block;font-family:"Courier Prime",monospace;font-weight:400;font-size:12.5px;letter-spacing:.06em;opacity:.9}
.jalur{display:flex;flex-wrap:wrap;gap:4px;margin:0;padding:0;list-style:none}
.jalur a{display:inline-flex;align-items:center;min-height:40px;padding:4px 10px;color:#fff;text-decoration:none;border:1px solid rgba(255,255,255,.35);font-family:"Courier Prime",monospace;font-size:15px}
.jalur a:hover,.jalur a[aria-current]{background:var(--pensil);color:var(--tinta);border-color:var(--pensil)}
.lipat{display:none}
@media (max-width:760px){
 .jalur{display:none}
 .lipat{display:block;width:100%}
 .lipat summary{cursor:pointer;list-style:none;display:inline-flex;align-items:center;min-height:44px;padding:4px 14px;background:var(--pensil);color:var(--tinta);font-weight:800;font-family:"Courier Prime",monospace}
 .lipat summary::-webkit-details-marker{display:none}
 .lipat ul{list-style:none;margin:8px 0 4px;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:6px}
 .lipat a{display:flex;align-items:center;min-height:44px;padding:4px 10px;border:1px solid rgba(255,255,255,.45);color:#fff;text-decoration:none;font-family:"Courier Prime",monospace}
}

/* bidang gambar: area biru di awal main */
.bidang{background-color:var(--cb);background-image:linear-gradient(rgba(255,255,255,.1) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.1) 1px,transparent 1px),linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:96px 96px,96px 96px,12px 12px,12px 12px;color:#fff}
.bidang-dalam{max-width:1160px;margin:0 auto;padding:22px 16px 30px}
.jejak{font-family:"Courier Prime",monospace;font-size:14px;margin:0 0 14px;padding:0;list-style:none;display:flex;flex-wrap:wrap;gap:4px 8px}
.jejak li+li::before{content:"/";margin-right:8px;opacity:.7}
.jejak a{color:#fde68a}
.bidang h1{font-size:clamp(27px,5.2vw,44px);line-height:1.15;margin:0 0 12px;font-weight:800;max-width:820px}
.pengantar{max-width:760px;margin:0;font-size:18px;color:#e2e8f0}
.ukur{display:flex;align-items:center;gap:8px;font-family:"Courier Prime",monospace;font-size:13px;color:#fde68a;margin:16px 0 6px}
.ukur::before,.ukur::after{content:"";flex:1;height:0;border-top:1px solid rgba(255,255,255,.6)}
.ukur span{white-space:nowrap}

/* kop gambar teknik (title block) */
.kop{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));border:1px solid rgba(255,255,255,.85);margin-top:20px;background:rgba(8,44,105,.55)}
.kop div{padding:8px 10px;border-right:1px solid rgba(255,255,255,.45);min-width:0}
.kop div:last-child{border-right:0}
.kop dt{font-family:"Courier Prime",monospace;font-size:12.5px;letter-spacing:.08em;text-transform:uppercase;color:#bfdbfe;margin:0}
.kop dd{margin:2px 0 0;font-weight:600;font-size:15.5px;overflow-wrap:anywhere}
.kop dl{margin:0}
@media (max-width:760px){.kop{grid-template-columns:1fr 1fr}.kop div{border-bottom:1px solid rgba(255,255,255,.35)}.kop div:nth-child(2n){border-right:0}.kop div:first-child{grid-column:1/-1;border-right:0}}

/* isi */
.lembar{max-width:1160px;margin:0 auto;padding:28px 16px 40px;display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:40px}
.lembar.penuh{grid-template-columns:minmax(0,1fr)}
@media (max-width:900px){.lembar{grid-template-columns:minmax(0,1fr)}}
.naskah{min-width:0}
.naskah h2{font-size:26px;line-height:1.25;margin:38px 0 12px;padding-top:12px;border-top:1px solid var(--garis);position:relative}
.naskah h2 .no{font-family:"Courier Prime",monospace;font-size:14px;color:#fff;background:var(--cb);padding:1px 7px;margin-right:8px;vertical-align:4px}
.naskah h3{font-size:20px;margin:26px 0 8px}
.naskah p,.naskah li{max-width:74ch}
.naskah ul,.naskah ol{padding-left:22px}
.naskah li{margin:4px 0}
.gbr{margin:24px 0;border:1px solid var(--cb);background:#fff;padding:8px}
.gbr figcaption{font-family:"Courier Prime",monospace;font-size:13.5px;color:var(--abu);padding:6px 2px 0}
.tabel-geser{overflow-x:auto;margin:18px 0;border:1px solid var(--cb)}
table{border-collapse:collapse;width:100%;font-size:15.5px;background:#fff}
th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--garis);vertical-align:top}
thead th{background:var(--cb);color:#fff;font-family:"Courier Prime",monospace;font-weight:700;font-size:14.5px}
td.angka,th.angka{text-align:right;font-variant-numeric:tabular-nums}
caption{caption-side:bottom;text-align:left;font-family:"Courier Prime",monospace;font-size:13px;color:var(--abu);padding:8px 10px}
.catatan-gambar{border-left:4px solid var(--pensil);background:#fffbeb;padding:12px 16px;margin:22px 0}
.catatan-gambar p{margin:6px 0}
.catatan-gambar strong{font-family:"Courier Prime",monospace}
.urut-kerja{counter-reset:k;list-style:none;padding-left:0 !important}
.urut-kerja li{counter-increment:k;position:relative;padding:10px 12px 10px 58px;border:1px dashed #94a3b8;margin:8px 0;background:#fff}
.urut-kerja li::before{content:"L-" counter(k);position:absolute;left:10px;top:10px;font-family:"Courier Prime",monospace;font-weight:700;color:var(--cb)}
.revisi{list-style:none;padding:0 !important;border-left:2px solid var(--cb);margin-left:6px}
.revisi li{padding:6px 0 6px 18px;position:relative}
.revisi li::before{content:"";position:absolute;left:-7px;top:14px;width:12px;height:12px;background:var(--pensil);border:1px solid var(--tinta)}
.revisi b{font-family:"Courier Prime",monospace}
.tanya dt{font-weight:800;margin-top:16px}
.tanya dd{margin:4px 0 0;padding-left:14px;border-left:2px solid var(--garis)}
.dua-kolom{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:640px){.dua-kolom{grid-template-columns:1fr}}
.petak{border:1px solid var(--cb);padding:12px 14px;background:#fff}
.petak p{margin:6px 0}
.label-petak{font-family:"Courier Prime",monospace;font-size:13px;color:#fff;background:var(--cb);display:inline-block;padding:1px 8px}

/* samping */
.samping{min-width:0}
.samping .kotak{border:1px solid var(--cb);background:#fff;margin-bottom:18px}
.samping .kotak p.judul{margin:0;background:var(--cb);color:#fff;font-family:"Courier Prime",monospace;font-size:14px;padding:6px 10px;letter-spacing:.05em}
.samping ul{list-style:none;margin:0;padding:6px 10px}
.samping li a{display:block;padding:8px 0;min-height:24px;border-bottom:1px dotted var(--garis);text-decoration:none}
.samping .risiko{padding:10px;font-size:15px;margin:0}

/* tombol kuning (hanya navigasi internal) */
.tombol{display:inline-flex;align-items:center;min-height:44px;padding:6px 16px;background:var(--pensil);color:var(--tinta);font-weight:800;text-decoration:none;border:1px solid var(--tinta)}
.tombol:hover{background:#fbbf24;color:var(--tinta)}

/* beranda: denah grup */
.denah-wadah{max-width:1160px;margin:0 auto;padding:10px 16px 34px}
.denah{display:grid;grid-template-columns:1.25fr 1fr;grid-template-rows:auto auto;gap:34px 38px;position:relative}
.zona{border:1px solid rgba(255,255,255,.85);padding:14px;position:relative;background:rgba(8,44,105,.45)}
.zona-kode{font-family:"Courier Prime",monospace;font-size:13px;color:#fde68a;letter-spacing:.08em}
.zona h2{margin:2px 0 10px;font-size:21px;line-height:1.25}
.zona p{margin:6px 0;color:#e2e8f0;font-size:15.5px}
.zona-sig{grid-row:1/3}
.ruang{display:block;border:1px dashed rgba(255,255,255,.75);padding:10px 12px;margin:10px 0 0;color:#fff;text-decoration:none;min-height:44px}
.ruang:hover{border-style:solid;border-color:var(--pensil);background:rgba(245,158,11,.12);color:#fff}
.ruang b{font-family:"Courier Prime",monospace;font-size:18px;color:var(--pensil);margin-right:6px}
.ruang span{font-size:15px}
.ruang.induk{border-style:solid;border-width:2px}
.anak{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:4px}
.dimensi{position:relative;margin:14px 0 2px;height:22px;font-family:"Courier Prime",monospace;font-size:12.5px;color:#fde68a;text-align:center}
.dimensi::before{content:"";position:absolute;left:0;right:0;top:11px;border-top:1px solid rgba(255,255,255,.7)}
.dimensi::after{content:"";position:absolute;left:0;right:0;top:5px;height:12px;border-left:1px solid #fff;border-right:1px solid #fff}
.dimensi span{position:relative;background:var(--cb);padding:0 6px;z-index:1}
.sambung{position:absolute;font-family:"Courier Prime",monospace;font-size:12.5px;color:#fde68a}
.sambung-h{left:calc(55.5% - 38px);width:38px;top:50%;border-top:1px dashed #fff}
@media (max-width:820px){.denah{grid-template-columns:1fr}.zona-sig{grid-row:auto}.sambung{display:none}.anak{grid-template-columns:1fr}}
.skala{display:flex;gap:0;margin-top:14px;font-family:"Courier Prime",monospace;font-size:12.5px;color:#e2e8f0}
.skala i{display:block;width:40px;height:8px;border:1px solid #fff}
.skala i:nth-child(odd){background:#fff}
.skala span{margin-left:10px}

.register{max-width:1160px;margin:0 auto;padding:30px 16px}
.legenda{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:14px 0}
.legenda div{border:1px solid var(--cb);padding:10px;background:#fff;font-size:15px}
.legenda .simbol{font-family:"Courier Prime",monospace;font-weight:700;color:var(--cb);display:block;font-size:14px}
@media (max-width:820px){.legenda{grid-template-columns:1fr 1fr}}
@media (max-width:420px){.legenda{grid-template-columns:1fr}}
.pita{background:var(--tinta);color:#e2e8f0}
.pita .register{padding-top:24px;padding-bottom:24px}
.pita a{color:#fde68a}
.pita h2{color:#fff}

/* kaki */
.kaki{background:var(--cb-gelap);color:#dbeafe;border-top:3px solid var(--pensil);font-size:15px}
.kaki-dalam{max-width:1160px;margin:0 auto;padding:24px 16px;display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px}
@media (max-width:760px){.kaki-dalam{grid-template-columns:1fr}}
.kaki p{margin:6px 0}
.kaki .kepala-kaki{font-family:"Courier Prime",monospace;color:#fde68a;letter-spacing:.06em;margin-bottom:6px}
.kaki ul{list-style:none;margin:0;padding:0}
.kaki li a{display:inline-block;padding:5px 0;min-height:24px;color:#fff}
.kaki-bawah{border-top:1px solid rgba(255,255,255,.25);text-align:center;padding:12px 16px;font-family:"Courier Prime",monospace;font-size:13px}

.zona a:not(.ruang){color:#fde68a}
.zona a:not(.ruang):hover{color:#fff}