:root {
  --biru: #1747c4;
  --biru-tua: #0f2f86;
  --biru-muda: #eaf0fd;
  --garis: #d6deef;
  --teks: #142038;
  --abu: #5b6783;
  --merah: #b42318;
  --hijau: #16794c;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; color: var(--teks); background: #f6f8fd; }
h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 .5rem; }
h2 { font-size: 1.3rem; color: var(--biru-tua); }
a { color: var(--biru); }
:focus-visible { outline: 2px solid var(--biru); outline-offset: 2px; }

.atas { position: sticky; top: 0; z-index: 5; display: flex; justify-content: space-between; align-items: center; padding: .75rem clamp(1rem, 4vw, 2.5rem); background: #fff; border-bottom: 1px solid var(--garis); }
.merek { font-size: 1.3rem; font-weight: 700; letter-spacing: -.01em; color: var(--biru); text-decoration: none; }
.isi { display: grid; gap: 2.25rem; max-width: 960px; margin: 0 auto; padding: 1.5rem clamp(1rem, 4vw, 2rem) 4rem; }
.kartu { margin-bottom: 1rem; padding: 1rem 1.25rem; background: #fff; border: 1px solid var(--garis); border-radius: 8px; }
.cat, .kosong { margin: .25rem 0; font-size: .9rem; color: var(--abu); }

.tombol { display: inline-block; padding: .65rem 1.1rem; border: 1px solid var(--biru); border-radius: 6px; background: var(--biru); color: #fff; font: inherit; font-weight: 600; text-align: center; text-decoration: none; cursor: pointer; }
.tombol:hover { background: var(--biru-tua); }
.tombol.garis { background: #fff; color: var(--biru); }
.tombol.garis:hover { background: var(--biru-muda); }
.tombol.kecil { padding: .4rem .8rem; font-size: .9rem; }

input, select, textarea { width: 100%; padding: .6rem .75rem; border: 1px solid var(--garis); border-radius: 6px; background: #fff; font: inherit; }
label { display: grid; gap: .25rem; font-size: .9rem; font-weight: 600; }
.form { display: grid; gap: 1rem; }
.dua { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; }
.baris, .unggah { display: flex; flex-wrap: wrap; gap: .5rem; margin: .75rem 0 0; }
.baris input, .unggah input { flex: 1 1 200px; width: auto; }

.daftar { margin: .5rem 0 0; padding: 0; list-style: none; }
.daftar li { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .25rem 1rem; padding: .5rem 0; border-top: 1px solid var(--garis); }
.daftar span { color: var(--abu); }
.soal-daftar { display: grid; gap: .75rem; margin: 1rem 0 0; padding: 0; list-style: none; }
.soal { padding: .75rem 1rem; border: 1px solid var(--garis); border-left: 4px solid var(--garis); border-radius: 6px; }
.soal p { margin: .25rem 0; }
.soal.aktif { border-left-color: var(--biru); background: var(--biru-muda); }
.soal.selesai { border-left-color: var(--hijau); }
.soal.kunci { opacity: .65; }
.pesan { min-height: 1.5rem; margin: 0; font-weight: 600; }
.pesan.galat { color: var(--merah); }
.pesan.ok { color: var(--hijau); }

.profil { position: relative; }
.avatar { width: 42px; height: 42px; padding: 0; overflow: hidden; border: 2px solid var(--biru); border-radius: 50%; background: var(--biru-muda); color: var(--biru); font-weight: 700; cursor: pointer; }
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.menu { position: absolute; right: 0; top: calc(100% + .5rem); display: grid; gap: .5rem; width: min(280px, 86vw); padding: 1rem; background: #fff; border: 1px solid var(--garis); border-radius: 8px; box-shadow: 0 6px 20px rgba(15, 47, 134, .12); }
.menu p { margin: 0; word-break: break-word; }
.menu .nama { font-weight: 700; }

.masuk { max-width: 440px; margin: 2rem auto; padding: 0 1rem; }
.tab { display: grid; grid-template-columns: 1fr 1fr; margin-bottom: 1rem; overflow: hidden; border: 1px solid var(--garis); border-radius: 6px; }
.tab button { padding: .6rem; border: 0; background: #fff; color: var(--abu); font: inherit; font-weight: 600; cursor: pointer; }
.tab button[aria-selected="true"] { background: var(--biru); color: #fff; }
.hero { max-width: 720px; margin: 0 auto; padding: 4rem 1.25rem; }
.hero h1 { font-size: clamp(1.9rem, 5vw, 3rem); color: var(--biru-tua); }
.hero p { max-width: 55ch; color: var(--abu); }
.aksi { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.5rem; }