/* IoT Kilat — gaya dasar. Palet: navy #0B1F3A; Sensor #00B3C6, Otak #6C3FC5, Internet #FF8A00, Aksi #1FA463; merah hanya alarm. */
:root {
  --navy: #0B1F3A; --navy2: #10294D; --garis: #27456F; --redup: #8FB3D9;
  --sensor: #00B3C6; --otak: #6C3FC5; --internet: #FF8A00; --aksi: #1FA463;
  --merah: #E53935; --kuning: #FFC107; --putih: #fff;
  --timA: #00E5FF; --timB: #FF8A00; --timC: #7CFF6B; --timD: #FF4FA3;
  --r: 14px;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--navy); color: var(--putih);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; font-size: 16px; line-height: 1.45; }
a { color: var(--sensor); }
h1, h2, h3 { line-height: 1.2; margin: .4em 0; }
.wadah { max-width: 640px; margin: 0 auto; padding: 14px 14px 90px; }
.wadah.lebar { max-width: 1280px; }
.redup { color: var(--redup); }
.kecil { font-size: .85rem; }
.tengah { text-align: center; }
.sembunyi { display: none !important; }
.baris { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.baris > .isi { flex: 1; }
.kisi2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.kisi3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }

/* ---------- kepala */
.kepala { display: flex; align-items: center; gap: 10px; padding: 10px 14px; background: var(--navy2);
  border-bottom: 1px solid var(--garis); position: sticky; top: 0; z-index: 20; }
.kepala .logo { font-weight: 800; letter-spacing: .5px; text-decoration: none; color: #fff; }
.kepala .logo b { color: var(--sensor); }
.kepala .isi { flex: 1; }
.kepala .kembali { text-decoration: none; font-size: 1.4rem; color: #fff; padding: 0 6px; }
.node { display: inline-flex; align-items: center; gap: 6px; font-size: .78rem; color: var(--redup);
  background: rgba(255,255,255,.06); padding: 4px 9px; border-radius: 99px; white-space: nowrap; }
.node i { width: 10px; height: 10px; border-radius: 50%; background: #666; display: inline-block; }
.node.hijau i { background: #2EE66B; box-shadow: 0 0 6px #2EE66B; }
.node.kuning i { background: var(--kuning); }
.node.merah i { background: var(--merah); }

/* ---------- kartu & form */
.kartu { background: var(--navy2); border: 1px solid var(--garis); border-radius: var(--r); padding: 16px; margin: 12px 0; }
.kartu h2, .kartu h3 { margin-top: 0; }
label { display: block; font-size: .9rem; color: var(--redup); margin: 10px 0 4px; }
input, select, textarea { width: 100%; padding: 12px; font-size: 1rem; border-radius: 10px; border: 1px solid var(--garis);
  background: #0D2445; color: #fff; font-family: inherit; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--sensor); }
input.pin { letter-spacing: .5em; font-size: 1.4rem; text-align: center; font-variant-numeric: tabular-nums; }
.tombol { display: inline-block; border: 0; border-radius: 12px; padding: 13px 18px; font-size: 1rem; font-weight: 700;
  background: var(--sensor); color: #00222A; cursor: pointer; text-decoration: none; text-align: center; font-family: inherit; }
.tombol.penuh { display: block; width: 100%; }
.tombol.besar { font-size: 1.2rem; padding: 18px; }
.tombol.ungu { background: var(--otak); color: #fff; }
.tombol.oranye { background: var(--internet); color: #2A1500; }
.tombol.hijau { background: var(--aksi); color: #fff; }
.tombol.merah { background: var(--merah); color: #fff; }
.tombol.garis { background: transparent; color: #fff; border: 1px solid var(--garis); }
.tombol.kecil { padding: 7px 11px; font-size: .85rem; border-radius: 9px; }
.tombol:disabled { opacity: .5; cursor: not-allowed; }
.pesan { padding: 10px 12px; border-radius: 10px; margin: 10px 0; font-size: .93rem; }
.pesan.galat { background: rgba(229,57,53,.18); border: 1px solid var(--merah); }
.pesan.oke { background: rgba(31,164,99,.18); border: 1px solid var(--aksi); }
.pesan.info { background: rgba(0,179,198,.12); border: 1px solid var(--sensor); }
.skala { display: flex; gap: 6px; }
.skala label { flex: 1; margin: 0; }
.skala input { display: none; }
.skala span { display: block; text-align: center; padding: 10px 0; border-radius: 9px; border: 1px solid var(--garis); cursor: pointer; color: #fff; }
.skala input:checked + span { background: var(--sensor); color: #00222A; font-weight: 800; }

/* ---------- tim */
.pilih-tim { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.pilih-tim button { padding: 16px 0; border-radius: 12px; border: 3px solid transparent; font-weight: 800; font-size: 1rem; cursor: pointer; color: #001; }
.pilih-tim button.aktif { border-color: #fff; transform: scale(1.05); }
.tA { color: var(--timA); } .tB { color: var(--timB); } .tC { color: var(--timC); } .tD { color: var(--timD); }
.bgA { background: var(--timA); } .bgB { background: var(--timB); } .bgC { background: var(--timC); } .bgD { background: var(--timD); }

/* ---------- pemindai sensor */
.kisi-sensor { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.ks { border-radius: 12px; padding: 12px 10px; background: var(--garis); color: var(--redup); font-weight: 700; font-size: .9rem;
  transition: background .4s, transform .3s; display: flex; align-items: center; gap: 8px; min-height: 52px; }
.ks .ik { font-size: 1.3rem; }
.ks small { display: block; font-weight: 400; font-size: .72rem; opacity: .85; }
.ks.ada { background: var(--sensor); color: #fff; transform: scale(1.02); }
.ks.cadangan { background: #2B4F7E; color: #fff; }
.ks.uji { animation: denyut 0.8s infinite; }
@keyframes denyut { 50% { opacity: .5; } }

/* ---------- galeri */
.galeri { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.app-kartu { background: var(--navy2); border: 1px solid var(--garis); border-radius: var(--r); padding: 12px; text-decoration: none; color: #fff;
  display: flex; flex-direction: column; gap: 4px; position: relative; min-height: 120px; }
.app-kartu .ik { font-size: 1.9rem; }
.app-kartu b { font-size: .98rem; }
.app-kartu small { color: var(--redup); font-size: .75rem; }
.app-kartu .bintang { position: absolute; top: 8px; right: 10px; color: var(--kuning); }
.app-kartu.tak-bisa { opacity: .45; }
.app-kartu.tak-bisa::after { content: "HP-mu tidak punya sensornya"; font-size: .7rem; color: #ffb4b4; }
.app-kartu.aktif-kelas { border: 2px solid var(--kuning); box-shadow: 0 0 14px rgba(255,193,7,.35); }

/* ---------- kerangka aplikasi sensor */
.instruksi { font-size: 1.05rem; background: rgba(0,179,198,.12); border-left: 4px solid var(--sensor); padding: 10px 12px; border-radius: 8px; }
.angka { text-align: center; margin: 8px 0 2px; }
.angka .besar { font-size: 3.6rem; font-weight: 800; line-height: 1; font-variant-numeric: tabular-nums; }
.angka .satuan { color: var(--redup); font-size: .95rem; }
.sub-angka { display: flex; justify-content: space-around; text-align: center; margin: 8px 0; }
.sub-angka b { display: block; font-size: 1.5rem; font-variant-numeric: tabular-nums; }
.sub-angka span { font-size: .75rem; color: var(--redup); }
canvas.grafik { width: 100%; height: 170px; display: block; background: var(--navy2); border-radius: 12px; border: 1px solid var(--garis); }
.strip-blok { display: grid; grid-template-columns: repeat(4, 1fr); gap: 5px; margin: 12px 0; }
.strip-blok div { text-align: center; padding: 8px 2px; border-radius: 9px; font-size: .72rem; font-weight: 800; opacity: .3; transition: opacity .25s; }
.strip-blok div.nyala { opacity: 1; }
.strip-blok .b-sensor { background: var(--sensor); } .strip-blok .b-otak { background: var(--otak); }
.strip-blok .b-internet { background: var(--internet); color: #2A1500; } .strip-blok .b-aksi { background: var(--aksi); }
.dunia { background: rgba(108,63,197,.15); border: 1px solid var(--otak); border-radius: 12px; padding: 12px; font-size: .92rem; }
.dunia b { color: #C9B5FF; }
.panel-app { margin: 10px 0; }
.label-zona { display: inline-block; padding: 3px 10px; border-radius: 99px; font-weight: 700; font-size: .85rem; background: var(--garis); }
.video-kecil { width: 100%; max-height: 240px; object-fit: cover; border-radius: 12px; background: #000; display: block; }
.kotak-video { position: relative; }
.kotak-video .bidik { position: absolute; left: 35%; top: 30%; width: 30%; height: 40%; border: 3px dashed #fff; border-radius: 10px; }

/* ---------- lapisan aktuator (layar berkedip, alarm) */
#lapisan-layar { position: fixed; inset: 0; pointer-events: none; z-index: 90; opacity: 0; transition: opacity .15s; }
#alarm { position: fixed; inset: 0; z-index: 100; background: #B71C1C; display: flex; flex-direction: column; align-items: center;
  justify-content: center; text-align: center; padding: 20px; animation: kedip .5s infinite alternate; }
#alarm h1 { font-size: 3rem; color: #FFEB3B; margin: .1em 0; }
#alarm p { font-size: 1.15rem; }
@keyframes kedip { from { background: #B71C1C; } to { background: #E53935; } }
@media (prefers-reduced-motion: reduce) { #alarm, .ks.uji { animation: none; } }
#spanduk { position: fixed; left: 10px; right: 10px; bottom: 12px; z-index: 80; background: var(--kuning); color: #221800;
  border-radius: 14px; padding: 12px 14px; display: flex; gap: 10px; align-items: center; box-shadow: 0 6px 24px rgba(0,0,0,.4); font-weight: 700; }
#spanduk .isi { flex: 1; }
#spanduk .tombol { background: var(--navy); color: #fff; }

/* ---------- lab */
.blok-aturan { background: var(--navy2); border: 1px solid var(--garis); border-radius: 12px; padding: 10px; margin: 8px 0; }
.blok-aturan .baris select, .blok-aturan .baris input { width: auto; flex: 1; min-width: 70px; padding: 9px; }
.blok-aturan .kata { font-weight: 800; color: var(--kuning); }
textarea.kode { font-family: Consolas, "Courier New", monospace; font-size: .9rem; min-height: 300px; line-height: 1.5;
  background: #1E1E2E; color: #E6E6E6; white-space: pre; tab-size: 2; }
.konsol { background: #000; color: #7CFF6B; font-family: Consolas, monospace; font-size: .82rem; padding: 10px; border-radius: 10px;
  height: 140px; overflow: auto; white-space: pre-wrap; }
.konsol .galat { color: #FF8A80; }
.tab { display: flex; gap: 6px; margin: 10px 0; }
.tab button { flex: 1; padding: 10px; border-radius: 10px; border: 1px solid var(--garis); background: transparent; color: #fff; font-weight: 700; cursor: pointer; }
.tab button.aktif { background: var(--otak); border-color: var(--otak); }

/* ---------- tantangan */
.pilihan-besar { display: grid; gap: 10px; }
.pilihan-besar button { padding: 18px; font-size: 1.15rem; font-weight: 800; border-radius: 14px; border: 0; cursor: pointer; }
.hitung-mundur { font-size: 5rem; font-weight: 900; text-align: center; font-variant-numeric: tabular-nums; }
.blok-susun { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.blok-susun button { padding: 16px 8px; border-radius: 12px; border: 0; font-weight: 800; color: #fff; cursor: pointer; font-size: .95rem; }
.slot-susun { display: grid; grid-template-columns: repeat(4, 1fr); gap: 5px; margin: 12px 0; }
.slot-susun div { min-height: 64px; border: 2px dashed var(--garis); border-radius: 10px; font-size: .75rem; display: flex; align-items: center;
  justify-content: center; text-align: center; padding: 4px; font-weight: 700; }

/* ---------- profil & koleksi */
.koleksi { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.koleksi div { background: var(--garis); border-radius: 10px; padding: 10px 6px; text-align: center; font-size: .78rem; color: var(--redup); }
.koleksi div.dapat { background: linear-gradient(135deg, var(--sensor), var(--otak)); color: #fff; font-weight: 700; }
.koleksi .ik { font-size: 1.5rem; display: block; }
.username-besar { font-size: 2rem; font-weight: 900; color: var(--kuning); text-align: center; letter-spacing: 1px; word-break: break-all; }

/* ---------- host / proyektor */
body.host { font-size: 17px; }
.host-kepala { display: flex; align-items: center; gap: 16px; padding: 10px 18px; background: var(--navy2); border-bottom: 1px solid var(--garis); flex-wrap: wrap; }
.host-kepala h1 { font-size: 1.4rem; margin: 0; }
.host-kepala .stat { color: var(--redup); font-size: .95rem; }
.host-kepala .stat b { color: #fff; }
.host-tata { display: grid; grid-template-columns: 260px 1fr; min-height: calc(100vh - 60px); }
.host-samping { background: #0A1A31; border-right: 1px solid var(--garis); padding: 12px; overflow: auto; max-height: calc(100vh - 60px); position: sticky; top: 0; }
.host-samping h3 { font-size: .8rem; text-transform: uppercase; letter-spacing: 1px; color: var(--redup); margin: 14px 0 6px; }
.host-samping button.st { display: block; width: 100%; text-align: left; padding: 8px 10px; margin: 3px 0; border-radius: 9px;
  background: transparent; border: 1px solid transparent; color: #fff; cursor: pointer; font-size: .92rem; }
.host-samping button.st:hover { background: var(--navy2); }
.host-samping button.st.aktif { background: var(--otak); }
.host-utama { padding: 16px 20px; overflow: auto; }
.panel-host { background: var(--navy2); border: 1px solid var(--garis); border-radius: 16px; padding: 14px 16px; }
.panel-host h2 { font-size: 1.1rem; margin: 0 0 8px; }
.kisi-host { display: grid; grid-template-columns: 2fr 1fr; gap: 16px; margin-bottom: 16px; }
.kisi-host.tiga { grid-template-columns: 1fr 1fr 1fr; }
.kisi-host.satu { grid-template-columns: 1fr; }
.angka-host { font-size: 6rem; font-weight: 900; line-height: 1; font-variant-numeric: tabular-nums; }
canvas.besar { width: 100%; height: 360px; display: block; }
canvas.sedang { width: 100%; height: 240px; display: block; }
.dinding { display: flex; flex-wrap: wrap; gap: 6px; }
.dinding span { padding: 5px 10px; border-radius: 8px; font-weight: 700; font-size: .9rem; color: #001; animation: masuk .5s; }
.dinding span.mati { opacity: .35; }
@keyframes masuk { from { transform: scale(.3); opacity: 0; } }
.qr-besar { background: #fff; padding: 12px; border-radius: 14px; display: inline-block; }
.qr-besar canvas { display: block; width: 260px; height: 260px; image-rendering: pixelated; }
.kode-sesi { font-size: 4.5rem; font-weight: 900; letter-spacing: 10px; color: var(--kuning); }
.tabel { width: 100%; border-collapse: collapse; font-size: .92rem; }
.tabel th, .tabel td { padding: 6px 8px; border-bottom: 1px solid var(--garis); text-align: left; }
.tabel th { color: var(--redup); font-weight: 600; }
pre.kode-pamer { background: #1E1E2E; padding: 12px; border-radius: 10px; font-size: .95rem; overflow: auto; max-height: 420px; }
.empat-blok { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.empat-blok div { border-radius: 16px; padding: 22px 12px; text-align: center; font-weight: 800; font-size: 1.3rem; transition: transform .3s, box-shadow .3s; }
.empat-blok div small { display: block; font-size: .85rem; font-weight: 400; margin-top: 6px; }
.empat-blok div.nyala { transform: scale(1.06); box-shadow: 0 0 30px rgba(255,255,255,.35); }
.alarm-host { background: var(--merah); border-radius: 14px; padding: 14px 18px; font-size: 1.3rem; font-weight: 800; margin-bottom: 14px; animation: kedip .5s infinite alternate; }

@media (max-width: 900px) {
  .host-tata { grid-template-columns: 1fr; }
  .host-samping { position: static; max-height: none; }
  .kisi-host, .kisi-host.tiga { grid-template-columns: 1fr; }
  .empat-blok { grid-template-columns: 1fr 1fr; }
}
@media print { .kepala, #spanduk { display: none; } }