:root {
  /* Brand Inti Buku (dokumen produk v2 bagian 5): cerdas · hangat · nggak menggurui — ungu nila + hijau tosca di atas putih lavender */
  --brand: #4330A8; --aksen: #1FB89A; --bg: #F6F4FD; --bg-gelap: #15122B; --teks: #1D1A33; --sukses: #22A06B; --peringatan: #E5484D;
  --font-judul: "Bricolage Grotesque", "Plus Jakarta Sans", ui-sans-serif, system-ui, sans-serif;
  --font-isi: "Plus Jakarta Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-baca: "Literata", Georgia, "Times New Roman", serif;
  --font-mono: "JetBrains Mono", ui-monospace, Menlo, monospace;
  --panel: #FFFFFF; --panel2: #EEEBFA; --line: #E1DCF3; --text: var(--teks); --muted: #6B6788;
  --brand2: #352485; --brandSoft: #E8E3FA; --on-brand: #FFFFFF; --aksenSoft: #DCF5EE; --aksenText: #157F6A; --warnSoft: #FBE4E5; --warnText: #A12E33; --okSoft: #DFF3E8;
  --shadow: 0 1px 2px rgba(50,35,110,.05), 0 8px 24px rgba(50,35,110,.07); --r: 14px; --huruf: 18px;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: var(--bg-gelap); --teks: #ECEAF6; --panel: #1E1A38; --panel2: #272246; --line: #342E58; --muted: #A49FC2;
  --brand: #A897F2; --brand2: #C2B6F7; --brandSoft: #2B2459; --on-brand: #15122B; --aksen: #3FD0B2; --aksenSoft: #163A33; --aksenText: #6FE3CB;
  --warnSoft: #41222A; --warnText: #FF9AA0; --okSoft: #17382A; --sukses: #4FD094; --peringatan: #FF7A80;
  --shadow: none; color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.55 var(--font-isi); -webkit-text-size-adjust: 100%; }
a { color: var(--brand); text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; font-family: var(--font-judul); letter-spacing: -.01em; }
h1 { font-size: 1.65rem; } h2 { font-size: 1.22rem; } h3 { font-size: 1.02rem; }
small, .muted { color: var(--muted); }
[hidden] { display: none !important; }
.mono { font-family: var(--font-mono); font-size: .9em; }
.num { font-family: var(--font-mono); font-weight: 600; }

.boot { min-height: 100vh; display: grid; place-content: center; text-align: center; gap: 12px; color: var(--muted); }
.logo-mark { width: 38px; height: 38px; border-radius: 10px; display: block; flex: none; }
.logo-mark.big { width: 72px; height: 72px; margin: 0 auto; }

.shell { display: grid; grid-template-columns: 256px 1fr; min-height: 100vh; }
.side { position: sticky; top: 0; height: 100vh; overflow-y: auto; background: var(--panel); border-right: 1px solid var(--line); padding: 16px 12px; display: flex; flex-direction: column; z-index: 20; }
.brand { display: flex; gap: 10px; align-items: center; padding: 4px 8px 14px; color: var(--text); }
.brand b { display: block; font-family: var(--font-judul); font-size: 19px; } .brand small { font-size: 12px; }
.nav-h { font-size: 11px; letter-spacing: .08em; font-weight: 700; color: var(--muted); margin: 14px 10px 6px; }
.nav-a { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 10px; color: var(--text); font-size: 14px; }
.nav-a:hover { background: var(--panel2); }
.nav-a.on { background: var(--brandSoft); color: var(--brand); font-weight: 600; }
.nav-a .n { margin-left: auto; font-size: 12px; color: var(--muted); font-family: var(--font-mono); }
.nav-a .tag { margin-left: auto; font-size: 10px; font-weight: 700; padding: 1px 6px; border-radius: 6px; background: var(--aksenSoft); color: var(--aksenText); }
.side-foot { margin-top: auto; padding: 12px 10px 0; font-size: 12px; color: var(--muted); }

.main { min-width: 0; display: flex; flex-direction: column; }
.top { position: sticky; top: 0; z-index: 10; display: flex; gap: 10px; align-items: center; padding: 12px 24px; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.search { position: relative; flex: 1; max-width: 560px; }
.search input { width: 100%; padding: 10px 40px 10px 14px; border-radius: 12px; border: 1px solid var(--line); background: var(--panel); outline: none; }
.search input:focus { border-color: var(--brand); }
.search kbd { position: absolute; right: 10px; top: 9px; font-size: 12px; border: 1px solid var(--line); border-radius: 6px; padding: 0 6px; color: var(--muted); }
.qres { position: absolute; left: 0; right: 0; top: 46px; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); max-height: 60vh; overflow: auto; padding: 6px; }
.qres a { display: block; padding: 8px 10px; border-radius: 8px; color: var(--text); font-size: 14px; }
.qres a:hover { background: var(--panel2); }
.qres .qh { font-size: 11px; font-weight: 700; color: var(--muted); padding: 8px 10px 2px; letter-spacing: .06em; }
.icon-btn { border: 1px solid var(--line); background: var(--panel); border-radius: 10px; width: 40px; height: 40px; cursor: pointer; flex: none; }
.view { padding: 24px; max-width: 1120px; width: 100%; }
.foot { margin-top: auto; padding: 18px 24px; color: var(--muted); font-size: 12px; border-top: 1px solid var(--line); }

.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--r); padding: 18px; box-shadow: var(--shadow); }
.grid { display: grid; gap: 14px; }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); } .g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); } .g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.stat b { display: block; font: 600 1.7rem/1.1 var(--font-mono); color: var(--brand); } .stat span { font-size: 13px; color: var(--muted); }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.between { justify-content: space-between; }
.hero { background: linear-gradient(135deg, var(--brandSoft), var(--panel) 70%); border: 1px solid var(--line); border-radius: 18px; padding: 22px; position: relative; overflow: hidden; }
.hero h1 { margin-bottom: 6px; }
.mt { margin-top: 18px; } .mb { margin-bottom: 14px; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 1px solid transparent; background: var(--brand); color: var(--on-brand); padding: 10px 16px; border-radius: 11px; cursor: pointer; font-weight: 600; font-size: 14px; text-decoration: none; min-height: 44px; }
.btn:hover { background: var(--brand2); }
.btn.ghost { background: var(--panel); color: var(--text); border-color: var(--line); }
.btn.ghost:hover { background: var(--panel2); }
.btn.aksen { background: var(--aksen); color: #0B2A24; }
.btn.sm { padding: 6px 12px; font-size: 13px; border-radius: 9px; min-height: 36px; }
.btn.big { font-size: 16px; padding: 14px 22px; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
.chip { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; padding: 2px 8px; border-radius: 999px; background: var(--panel2); color: var(--muted); border: 1px solid var(--line); }
.chip.ok { background: var(--okSoft); color: var(--sukses); border-color: transparent; }
.chip.aksen { background: var(--aksenSoft); color: var(--aksenText); border-color: transparent; }
.chip.warn { background: var(--warnSoft); color: var(--warnText); border-color: transparent; }
.chip.brand { background: var(--brandSoft); color: var(--brand); border-color: transparent; }

label.f { display: block; font-size: 13px; font-weight: 600; margin: 12px 0 6px; }
.inp, select.inp, textarea.inp { width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 11px; background: var(--panel); outline: none; min-height: 44px; }
.inp:focus { border-color: var(--brand); }
textarea.inp { min-height: 110px; resize: vertical; line-height: 1.5; }
.steps { display: flex; gap: 6px; margin: 4px 0 18px; }
.steps div { flex: 1; height: 6px; border-radius: 4px; background: var(--line); }
.steps div.on { background: var(--brand); }
.disclaimer { background: var(--warnSoft); color: var(--warnText); border-radius: 12px; padding: 10px 14px; font-size: 13px; margin-bottom: 14px; }
.info { background: var(--brandSoft); color: var(--brand); border-radius: 12px; padding: 10px 14px; font-size: 13px; margin-bottom: 14px; }
.progress { height: 8px; background: var(--line); border-radius: 6px; overflow: hidden; } .progress i { display: block; height: 100%; background: var(--aksen); transition: width .3s; }
.empty { text-align: center; padding: 30px 16px; color: var(--muted); border: 1px dashed var(--line); border-radius: 14px; }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin: 10px 0 14px; }
.tabs button { border: 1px solid var(--line); background: var(--panel); border-radius: 999px; padding: 6px 12px; cursor: pointer; font-size: 13px; min-height: 36px; }
.tabs button.on { background: var(--brand); color: var(--on-brand); border-color: var(--brand); }
.kat { display: flex; gap: 10px; align-items: center; padding: 14px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); color: var(--text); }
.kat:hover { border-color: var(--brand); } .kat b { display: block; font-size: 14px; } .kat span { font-size: 12px; color: var(--muted); }
.kat .ic { font-size: 22px; }

/* Rak & kartu buku */
.rak { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 14px; }
.rak.row-scroll { display: flex; overflow-x: auto; padding-bottom: 6px; scroll-snap-type: x mandatory; }
.rak.row-scroll .bk { flex: 0 0 150px; scroll-snap-align: start; }
.bk { display: block; color: var(--text); background: var(--panel); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; transition: transform .15s; }
.bk:hover { transform: translateY(-2px); border-color: var(--brand); }
.cover { aspect-ratio: 2 / 3; padding: 14px 12px; display: flex; flex-direction: column; justify-content: space-between; color: #fff; position: relative; }
.cover .cj { font: 700 15px/1.15 var(--font-judul); letter-spacing: -.01em; text-wrap: balance; }
.cover .cp { font-size: 11px; opacity: .85; }
.cover .ck { position: absolute; top: 10px; right: 10px; font-size: 16px; }
.cover.lg { border-radius: 14px; max-width: 220px; }
.cover.lg .cj { font-size: 20px; }
.bk .bi { padding: 8px 10px 10px; font-size: 12px; color: var(--muted); display: flex; flex-direction: column; gap: 4px; }
.bk .bi b { color: var(--text); font-size: 13px; line-height: 1.2; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.meter { display: flex; align-items: center; gap: 6px; font-size: 11px; color: var(--muted); }
.meter i { flex: 1; height: 5px; border-radius: 4px; background: var(--line); overflow: hidden; display: block; }
.meter i b { display: block; height: 100%; background: var(--aksen); }
.list .item, .item { display: flex; gap: 12px; align-items: flex-start; padding: 12px 14px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); color: var(--text); margin-bottom: 8px; }
.item:hover { border-color: var(--brand); }
.item .t { font-weight: 600; } .item .s { font-size: 13px; color: var(--muted); }
.star { background: none; border: 0; font-size: 20px; cursor: pointer; color: var(--muted); padding: 0 4px; flex: none; margin-left: auto; min-width: 36px; min-height: 36px; }
.star.on { color: #E8B531; }
.mini-cover { width: 44px; height: 64px; border-radius: 6px; flex: none; display: flex; align-items: flex-end; padding: 5px; color: #fff; font: 700 9px/1.1 var(--font-judul); overflow: hidden; }

/* Detail buku */
.detail { display: grid; grid-template-columns: 220px 1fr; gap: 22px; }
.aksi-row { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0; }
.bab-list { list-style: none; padding: 0; margin: 0; }
.bab-list li a { display: flex; gap: 10px; align-items: center; padding: 10px 12px; border-radius: 10px; color: var(--text); border: 1px solid transparent; }
.bab-list li a:hover { background: var(--panel2); }
.bab-list li a.on { background: var(--brandSoft); border-color: var(--line); }
.bab-list .no { font-family: var(--font-mono); color: var(--brand); font-size: 12px; min-width: 24px; }
.bab-list .ok { margin-left: auto; color: var(--sukses); }
.skor { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; margin-top: 10px; }
.skor div { background: var(--panel2); border-radius: 10px; padding: 8px 10px; font-size: 12px; color: var(--muted); }
.skor div b { display: block; font: 600 15px var(--font-mono); color: var(--text); }
.ring { width: 92px; height: 92px; border-radius: 50%; display: grid; place-content: center; background: conic-gradient(var(--aksen) calc(var(--p) * 1%), var(--line) 0); position: relative; flex: none; }
.ring::before { content: ""; position: absolute; inset: 9px; border-radius: 50%; background: var(--panel); }
.ring b { position: relative; font: 600 20px var(--font-mono); color: var(--text); }
.ring small { position: relative; font-size: 10px; display: block; text-align: center; }

/* Reader */
.reader { max-width: 680px; margin: 0 auto; }
.reader .bar { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 14px; }
.reader .bar .sp { flex: 1; }
.teks { font-family: var(--font-baca); font-size: var(--huruf); line-height: 1.7; }
.teks h1 { font-family: var(--font-judul); font-size: 1.5rem; margin-bottom: 4px; }
.teks p { margin: 0 0 1.1em; }
.teks mark { background: color-mix(in srgb, var(--aksen) 35%, transparent); color: inherit; border-radius: 3px; padding: 0 2px; }
.intinya { border-left: 4px solid var(--aksen); background: var(--aksenSoft); color: var(--aksenText); padding: 10px 14px; border-radius: 0 12px 12px 0; font-family: var(--font-isi); font-size: 15px; margin: 18px 0; }
.intinya b { display: block; font-size: 11px; letter-spacing: .08em; margin-bottom: 2px; }
.tts { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 8px 10px; }
.tts select { padding: 6px 8px; border-radius: 8px; border: 1px solid var(--line); background: var(--panel); max-width: 160px; }
.hl-btn { position: fixed; z-index: 60; background: var(--brand); color: var(--on-brand); border: 0; border-radius: 999px; padding: 8px 14px; font-weight: 700; box-shadow: var(--shadow); cursor: pointer; }
.nav-bab { display: flex; gap: 10px; justify-content: space-between; margin-top: 24px; }
.catatan-box { margin-top: 22px; }

/* Kuis & kartu */
.opsi { display: grid; gap: 8px; margin: 10px 0 14px; }
.opsi button { text-align: left; padding: 12px 14px; border: 1px solid var(--line); background: var(--panel); border-radius: 12px; cursor: pointer; min-height: 44px; line-height: 1.4; }
.opsi button.on { border-color: var(--brand); background: var(--brandSoft); }
.opsi button.benar { border-color: var(--sukses); background: var(--okSoft); }
.opsi button.salah { border-color: var(--peringatan); background: var(--warnSoft); }
.bahas { background: var(--panel2); border-radius: 12px; padding: 12px 14px; font-size: 14px; }
.flash { perspective: 1000px; cursor: pointer; }
.flash .in { position: relative; min-height: 220px; transition: transform .45s; transform-style: preserve-3d; }
.flash.flip .in { transform: rotateY(180deg); }
.flash .sisi { position: absolute; inset: 0; backface-visibility: hidden; display: grid; place-content: center; text-align: center; padding: 22px; border-radius: 16px; border: 1px solid var(--line); background: var(--panel); font-size: 17px; line-height: 1.5; }
.flash .sisi.b { transform: rotateY(180deg); background: var(--brandSoft); }
.flash .sisi small { display: block; margin-bottom: 8px; letter-spacing: .08em; font-size: 11px; }
.chk { width: 22px; height: 22px; accent-color: var(--aksen); cursor: pointer; flex: none; }
.tantangan li { display: flex; gap: 10px; align-items: flex-start; padding: 10px 0; border-bottom: 1px solid var(--line); }
.tantangan li.done span { text-decoration: line-through; color: var(--muted); }
.tujuan-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 8px; }
.tujuan-grid button { text-align: left; padding: 12px; border: 1px solid var(--line); background: var(--panel); border-radius: 12px; cursor: pointer; min-height: 44px; font-size: 14px; }
.tujuan-grid button.on { border-color: var(--brand); background: var(--brandSoft); font-weight: 600; }
pre.prompt { white-space: pre-wrap; background: var(--panel2); border: 1px solid var(--line); border-radius: 10px; padding: 12px; font: 12.5px/1.5 var(--font-mono); max-height: 300px; overflow: auto; }
.plan-hari { display: flex; gap: 10px; align-items: center; padding: 8px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
.plan-hari .h { font-family: var(--font-mono); color: var(--brand); min-width: 48px; font-size: 12px; }
.plan-hari.now { background: var(--brandSoft); margin: 0 -10px; padding: 8px 10px; border-radius: 10px; }

.modal { position: fixed; inset: 0; background: rgba(21,18,43,.55); z-index: 50; display: grid; place-items: center; padding: 16px; }
.modal-box { background: var(--panel); border-radius: 18px; padding: 22px; max-width: 560px; width: 100%; max-height: 92vh; overflow: auto; box-shadow: var(--shadow); }
.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 12px; font-size: 14px; z-index: 70; max-width: 92vw; }
.scrim { position: fixed; inset: 0; background: rgba(21,18,43,.45); z-index: 19; }
.bottom { position: fixed; bottom: 0; left: 0; right: 0; background: var(--panel); border-top: 1px solid var(--line); display: flex; z-index: 15; padding-bottom: env(safe-area-inset-bottom); }
.bottom a { flex: 1; text-align: center; font-size: 11px; padding: 8px 2px 6px; color: var(--muted); min-height: 52px; }
.bottom a span { display: block; font-size: 20px; }
.bottom a.on { color: var(--brand); font-weight: 600; }
.only-m { display: none; }

@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .side { position: fixed; left: 0; top: 0; width: 280px; transform: translateX(-100%); transition: transform .2s; }
  .side.open { transform: none; }
  .only-m { display: inline-flex; } .only-d { display: none; }
  .top { padding: 10px 14px; } .view { padding: 16px 14px 90px; } .foot { padding-bottom: 80px; }
  .g4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } .g3 { grid-template-columns: 1fr; } .g2 { grid-template-columns: 1fr; }
  .detail { grid-template-columns: 1fr; } .cover.lg { max-width: 160px; }
  .rak { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
  h1 { font-size: 1.4rem; }
}