:root {
  --navy: #1F3A5F;
  --emas: #C9971C;
  --krem: #FFF8E6;
  --biru-muda: #E8F0FB;
  --hijau: #2E7D4F;
  --hijau-muda: #E6F5EC;
  --merah: #C0533A;
  --merah-muda: #FDE8E4;
  --teks: #1B1B1B;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  font-size: 20px;
  line-height: 1.5;
  color: var(--teks);
  background: #F4F6FA;
}

.atas {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px;
  background: var(--navy); color: #fff;
}
.judul-app { font-weight: 700; font-size: 20px; }
.lencana-demo {
  font-size: 11px; font-weight: 700; letter-spacing: 1px;
  background: var(--emas); color: #fff; border-radius: 6px; padding: 2px 6px; vertical-align: middle;
}
.btn-ikon {
  background: rgba(255,255,255,.12); border: 0; color: #fff;
  font-size: 22px; width: 44px; height: 44px; border-radius: 12px; cursor: pointer;
}
.btn-ikon.mati { opacity: .45; }

main { max-width: 640px; margin: 0 auto; padding: 16px 14px 90px; }

.kartu {
  background: #fff; border-radius: 18px; padding: 20px;
  box-shadow: 0 2px 10px rgba(31,58,95,.08); margin-bottom: 14px;
}
.kartu h2 { margin: 0 0 10px; font-size: 24px; color: var(--navy); }
.kartu h3 { margin: 0 0 8px; font-size: 18px; color: var(--emas); text-transform: uppercase; letter-spacing: .5px; }
.kartu p { margin: 0 0 10px; }
.kalimat { font-size: 22px; margin: 0 0 12px; }
.kecil { font-size: 15px; color: #555; }

.btn {
  display: block; width: 100%; border: 0; border-radius: 14px;
  padding: 16px 18px; margin: 10px 0 0; font-size: 20px; font-weight: 600;
  cursor: pointer; text-align: center;
}
.btn-utama { background: var(--navy); color: #fff; }
.btn-kedua { background: var(--biru-muda); color: var(--navy); }
.btn-emas { background: var(--emas); color: #fff; }
.btn:disabled { opacity: .5; cursor: default; }
.baris-btn { display: flex; gap: 10px; }
.baris-btn .btn { flex: 1; font-size: 18px; white-space: nowrap; padding: 16px 10px; }
.baris-btn .btn { min-width: 0; }
.baris-btn .btn-kembali { flex: 0 0 auto; width: auto; padding: 16px 16px; }

.pilihan { background: #fff; color: var(--teks); border: 2px solid #C9D3E3; font-size: 24px; }
.pilihan.benar { background: var(--hijau-muda); border-color: var(--hijau); }
.pilihan.salah { background: var(--merah-muda); border-color: var(--merah); }

.masuk { width: 100%; font-size: 22px; padding: 14px; border-radius: 12px; border: 2px solid #C9D3E3; }

.daftar-subbab .btn { text-align: left; display: flex; align-items: center; gap: 12px; }
.daftar-subbab .ikon { font-size: 30px; }
.daftar-subbab .status { margin-left: auto; font-size: 15px; font-weight: 600; }

.kunci {
  background: var(--krem); border: 2px dashed var(--emas); border-radius: 16px;
  padding: 18px; font-size: 24px; font-weight: 700; color: var(--navy); text-align: center;
}

.umpan { border-radius: 14px; padding: 14px; margin-top: 12px; font-size: 20px; }
.umpan.benar { background: var(--hijau-muda); color: var(--hijau); }
.umpan.salah { background: var(--merah-muda); color: var(--merah); }
.umpan.info { background: var(--biru-muda); color: var(--navy); }

.kemajuan { height: 10px; background: #DCE3EE; border-radius: 6px; overflow: hidden; margin-bottom: 14px; }
.kemajuan > div { height: 100%; background: var(--emas); transition: width .3s; }

.garis-wrap { overflow-x: auto; margin: 6px 0 12px; }
.garis-wrap svg { width: 100%; height: auto; display: block; }
.lompat { opacity: 0; animation: muncul .45s forwards; }
@keyframes muncul { to { opacity: 1; } }

.visual { margin: 6px 0 14px; text-align: center; }
.baris-angka { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 6px; }
.kotak-angka {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: 10px;
  background: var(--biru-muda); border: 2px solid #5B7DB1; color: var(--navy);
  font-size: 24px; font-weight: 700; position: relative;
}
.kotak-angka.grup-b { background: var(--krem); border-color: var(--emas); }
.kali-x { font-size: 22px; color: #777; }
.baris-hasil { display: flex; flex-direction: column; gap: 2px; margin-top: 10px; font-size: 18px; color: #444; }
.hasil-akhir {
  display: inline-block; margin-top: 10px; padding: 8px 16px; border-radius: 12px;
  background: var(--krem); border: 2px solid var(--emas); font-size: 24px; font-weight: 700; color: var(--navy);
}
.ubin { display: grid; gap: 4px; margin: 0 auto; }
.ubin span { aspect-ratio: 1; border-radius: 4px; background: #9DB8E0; border: 1px solid #5B7DB1; }
.garis-bagi { height: 3px; background: var(--navy); margin: 8px auto; max-width: 320px; border-radius: 2px; }
.kotak-angka.dicoret::after {
  content: ''; position: absolute; left: -4px; right: -4px; top: 50%; height: 4px;
  background: var(--merah); transform: rotate(-35deg) scaleX(0); transform-origin: left;
  animation: coret .4s forwards; animation-delay: inherit;
}
.kotak-angka.dicoret { animation: redup .4s forwards; animation-delay: inherit; }
@keyframes coret { to { transform: rotate(-35deg) scaleX(1); } }
@keyframes redup { to { opacity: .45; } }

table.pola { margin: 0 auto; border-collapse: collapse; font-size: 24px; }
table.pola td { padding: 2px 10px; text-align: left; }
table.pola td.panah { font-size: 15px; color: #8A5A00; padding: 0 10px; }
table.pola td.sorot { color: var(--merah); font-weight: 700; }
.kunci.kunci-kecil { font-size: 20px; padding: 14px; }

.tanya-baris { display: flex; gap: 8px; }
.tanya-baris .masuk { flex: 1; }
.btn-mik {
  width: 60px; flex: 0 0 60px; border: 0; border-radius: 12px;
  background: var(--emas); color: #fff; font-size: 26px; cursor: pointer;
}
.btn-mik.dengar { background: var(--merah); animation: denyut 1s infinite; }
@keyframes denyut { 50% { opacity: .6; } }

.chip {
  display: inline-block; border: 1px solid #C9D3E3; background: #fff; border-radius: 20px;
  padding: 6px 12px; margin: 4px 4px 0 0; font-size: 15px; cursor: pointer;
}
.lapis { font-size: 13px; color: #777; margin-top: 8px; }

table.rapor { width: 100%; border-collapse: collapse; font-size: 17px; }
table.rapor td { padding: 8px 4px; border-bottom: 1px solid #E3E8F0; }

.bawah {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 5;
  display: flex; justify-content: center; gap: 8px;
  background: #fff; padding: 8px; box-shadow: 0 -2px 10px rgba(31,58,95,.1);
}
.bawah button {
  flex: 1; max-width: 200px; border: 0; background: var(--biru-muda); color: var(--navy);
  border-radius: 12px; padding: 10px; font-size: 16px; font-weight: 600; cursor: pointer;
}
.bawah button.aktif { background: var(--navy); color: #fff; }