:root {
  --merah: #C8102E;
  --merah-dalam: #9B0C24;
  --merah-lembut: #F8D4DA;
  --emas: #A67C2D;
  --krem: #F7F1EA;
  --kertas: #FFFCF8;
  --tinta: #1A1512;
  --lembut: #6B625C;
  --garis: #E8DFD6;
  --hijau: #0F7A5A;
  --hijau-lembut: #D8F3EA;
  --salah: #C8102E;
  --salah-lembut: #F8D4DA;
  --laut: #0E5E75;
  --bayang: 0 8px 24px rgba(26, 21, 18, .06);
  --zh: "PingFang SC", "Hiragino Sans GB", "Heiti SC", "Noto Sans CJK SC", "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, var(--zh);
  --display: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Songti SC", "STSong", serif;
  --radius: 16px;
}
* { box-sizing: border-box }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 76px; scroll-padding-bottom: 96px }
body {
  margin: 0;
  font: 16px/1.55 var(--sans);
  color: var(--tinta);
  background: var(--krem);
  padding-bottom: calc(24px + env(safe-area-inset-bottom));
  min-height: 100dvh;
}
body.has-tabs { padding-bottom: calc(84px + env(safe-area-inset-bottom)) }
a { color: var(--merah) }
a:hover { color: var(--merah-dalam) }
.hidden { display: none !important }
.center { text-align: center }
.muted { color: var(--lembut) }
.small { font-size: 13px }
.lead { font-size: 17px; color: var(--lembut); margin: 0 0 18px }

.top {
  position: sticky; top: 0; z-index: 20;
  background: rgba(247, 241, 234, .92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--garis);
}
.bar {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: calc(10px + env(safe-area-inset-top)) 16px 10px;
}
.brand {
  font-weight: 750;
  font-size: 17px;
  text-decoration: none;
  color: var(--tinta);
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -.02em;
}
.logo {
  display: inline-block;
  width: 32px; height: 32px;
  border-radius: 8px;
  background: linear-gradient(to bottom, #C8102E 50%, #fff 50%);
  box-shadow: inset 0 0 0 1px rgba(142, 11, 32, .35);
  color: transparent;
  font-size: 0;
  flex: none;
}
.lang {
  display: flex;
  border: 1px solid var(--garis);
  border-radius: 999px;
  overflow: hidden;
  background: var(--kertas);
}
.lang button {
  appearance: none;
  border: 0;
  background: transparent;
  font: inherit;
  font-size: 13px;
  font-weight: 650;
  padding: 7px 12px;
  min-height: 36px;
  cursor: pointer;
  color: var(--lembut);
}
.lang button[aria-pressed="true"] {
  background: var(--merah);
  color: #fff;
}

main {
  max-width: 820px;
  margin: 0 auto;
  padding: 20px 16px 8px;
  outline: none;
}
h1 { font-size: 28px; line-height: 1.25; margin: 6px 0 10px; letter-spacing: -.03em }
h2 { font-size: 18px; margin: 22px 0 10px; letter-spacing: -.02em }
h3 { font-size: 16px; margin: 16px 0 8px }

.hero {
  position: relative;
  background: var(--kertas);
  border: 1px solid var(--garis);
  border-radius: 24px;
  padding: 26px 22px 22px;
  box-shadow: var(--bayang);
  overflow: hidden;
  margin-bottom: 18px;
}
.hero::before {
  content: "";
  position: absolute; left: 0; right: 0; top: 0; height: 6px;
  background: linear-gradient(to bottom, var(--merah) 50%, #fff 50%);
  border-bottom: 1px solid var(--garis);
}
.hero h1 { margin-top: 8px }
.hero .actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; align-items: center }

.card {
  background: var(--kertas);
  border: 1px solid var(--garis);
  border-radius: var(--radius);
  padding: 16px 16px 14px;
  margin: 12px 0;
  box-shadow: var(--bayang);
}
.card p:last-child { margin-bottom: 0 }
.card h2 { margin-top: 0 }

.about-grid {
  display: grid;
  gap: 12px;
}
@media (min-width: 680px) {
  .about-grid { grid-template-columns: 1fr 1fr }
}

.levels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}
@media (min-width: 560px) {
  .levels { grid-template-columns: 1fr 1fr }
}
a.level {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  text-decoration: none;
  color: inherit;
  background: var(--kertas);
  border: 1px solid var(--garis);
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: var(--bayang);
  min-height: 88px;
  transition: transform .12s ease, border-color .12s ease;
}
a.level:active { transform: scale(.99) }
a.level:hover { border-color: #d8b7bd }
.lnum {
  flex: none;
  width: 48px; height: 48px;
  border-radius: 14px;
  display: grid; place-items: center;
  font-weight: 800;
  font-size: 20px;
  color: #fff;
  background: var(--merah);
}
.lnum.l1 { background: #0F7A5A }
.lnum.l2 { background: #1A7A4C }
.lnum.l3 { background: #3B7A2A }
.lnum.l4 { background: #A67C2D }
.lnum.l5 { background: #C05621 }
.lnum.l6 { background: #C8102E }
.lnum.l7 { background: #7A1024 }
.linfo { flex: 1; min-width: 0 }
.linfo b { display: block; font-size: 15px; margin-bottom: 2px }
.linfo span { display: block; color: var(--lembut); font-size: 13px }

.btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  text-align: center;
  border: 1px solid var(--garis);
  background: var(--kertas);
  color: var(--tinta);
  padding: 11px 16px;
  border-radius: 12px;
  font: inherit;
  font-weight: 650;
  cursor: pointer;
  touch-action: manipulation;
  min-height: 44px;
}
.btn.primary { background: var(--merah); border-color: var(--merah); color: #fff }
.btn.primary:hover { background: var(--merah-dalam); border-color: var(--merah-dalam); color: #fff }
.btn.ghost { background: transparent }
.btn.ok { background: var(--hijau); border-color: var(--hijau); color: #fff }
.btn.block { display: flex; width: 100% }
.btn:disabled { opacity: .5; cursor: not-allowed }
.btn.icon {
  width: 44px; height: 44px; padding: 0;
  border-radius: 50%;
  flex: none;
  background: var(--merah-lembut);
  border-color: transparent;
  color: var(--merah-dalam);
  font-size: 18px;
}
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center }
.row > .btn { flex: 1 }

.chips {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 0 10px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.chips::-webkit-scrollbar { display: none }
.chip {
  flex: none;
  border: 1px solid var(--garis);
  background: var(--kertas);
  border-radius: 999px;
  padding: 7px 13px;
  font: inherit;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  min-height: 36px;
  color: var(--tinta);
}
.chip.on { background: var(--merah); border-color: var(--merah); color: #fff }

input[type=search] {
  width: 100%;
  font: inherit;
  font-size: 16px;
  padding: 12px 14px;
  border: 1px solid var(--garis);
  border-radius: 12px;
  background: var(--kertas);
  color: var(--tinta);
  margin-bottom: 8px;
}
input[type=search]:focus { outline: 2px solid var(--merah); outline-offset: 1px }

.list { list-style: none; margin: 0; padding: 0 }
.w {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 12px 4px;
  border-bottom: 1px solid var(--garis);
}
.w .word {
  font-weight: 750;
  font-size: 18px;
  letter-spacing: -.02em;
  min-width: 0;
}
.w .info { flex: 1; min-width: 0 }
.w .gloss { color: var(--lembut); font-size: 13.5px; margin-top: 1px }
.w .ex { font-size: 13.5px; margin-top: 6px; color: var(--tinta) }
.w .ex em { font-style: normal; color: var(--lembut); display: block }
.dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--garis);
  flex: none;
  margin-top: 10px;
}
.dot.on { background: var(--hijau) }

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 12px 0 6px;
}
.stat {
  background: var(--kertas);
  border: 1px solid var(--garis);
  border-radius: 14px;
  padding: 12px 8px;
  text-align: center;
}
.stat b { display: block; font-size: 22px; color: var(--merah); letter-spacing: -.03em }
.stat span { color: var(--lembut); font-size: 12px }

/* Flashcards */
.flip-wrap { perspective: 1200px; margin: 8px 0 14px }
.flip {
  position: relative;
  min-height: 300px;
  transform-style: preserve-3d;
  transition: transform .5s cubic-bezier(.2, .7, .2, 1);
  cursor: pointer;
  border: 0;
  background: none;
  width: 100%;
  padding: 0;
  font: inherit;
  color: inherit;
  text-align: center;
}
.flip.is-back { transform: rotateY(180deg) }
.face {
  position: absolute; inset: 0;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  background: var(--kertas);
  border: 1px solid var(--garis);
  border-radius: 22px;
  box-shadow: var(--bayang);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 28px 20px;
}
.face.back { transform: rotateY(180deg) }
.face .big {
  font-family: var(--display);
  font-size: clamp(32px, 8vw, 52px);
  line-height: 1.2;
  letter-spacing: -.03em;
  font-weight: 650;
}
.face .mean { font-size: 22px; margin-top: 8px }
.face .zhx { font-family: var(--zh); font-size: 22px; margin-top: 4px; color: var(--merah-dalam) }
.face .hint { margin-top: 18px; color: var(--lembut); font-size: 13px }
.face .exbox { margin-top: 16px; font-size: 15px; max-width: 36em }
.face .exbox em { font-style: normal; display: block; color: var(--lembut); font-size: 13.5px; margin-top: 4px }
.counter { text-align: center; color: var(--lembut); font-size: 13px; margin-bottom: 6px }

/* Quiz */
.q .prompt { font-size: 15px; color: var(--lembut); text-align: center; margin: 4px 0 }
.q .stem {
  font-family: var(--display);
  font-size: clamp(24px, 6vw, 36px);
  text-align: center;
  margin: 8px 0 18px;
  line-height: 1.3;
  font-weight: 650;
}
.opts { display: grid; gap: 10px }
.opt { text-align: left; font-size: 16px; width: 100% }
.opt.right { background: var(--hijau-lembut); border-color: var(--hijau); color: var(--tinta) }
.opt.wrong { background: var(--salah-lembut); border-color: var(--salah) }
.explain { margin-top: 12px; font-size: 14px; color: var(--lembut) }
.res { font-size: 48px; font-weight: 800; text-align: center; color: var(--merah); letter-spacing: -.04em; margin: 8px 0 }
.res-note { text-align: center; font-size: 16px; margin: 0 0 16px }

progress {
  width: 100%; height: 8px;
  border-radius: 6px; overflow: hidden;
  -webkit-appearance: none; appearance: none;
  border: 0; background: var(--garis);
  display: block; margin: 8px 0 14px;
}
progress::-webkit-progress-bar { background: var(--garis) }
progress::-webkit-progress-value { background: var(--merah) }
progress::-moz-progress-bar { background: var(--merah) }

.grammar { margin: 0 0 16px }
.grammar h3 { margin-bottom: 6px }
.grammar .exg {
  margin: 8px 0 0;
  padding: 10px 12px;
  background: #F3EBE3;
  border-radius: 12px;
  font-size: 14.5px;
}
.grammar .exg em { font-style: normal; display: block; color: var(--lembut); font-size: 13px }
.ph {
  display: flex; gap: 10px; align-items: flex-start;
  padding: 12px 0; border-bottom: 1px solid var(--garis);
}
.ph .tx { flex: 1; min-width: 0 }
.ph .id { font-weight: 700; font-size: 16.5px }
.ph .gl { color: var(--lembut); font-size: 13.5px; margin-top: 2px }
.ph .note { font-size: 13px; margin-top: 6px; color: var(--tinta) }

.warn {
  background: #F8E7C7;
  color: #6B4E16;
  padding: 10px 16px;
  font-size: 14px;
  text-align: center;
}
.toast {
  pointer-events: none;
  position: fixed;
  left: 50%;
  top: calc(68px + env(safe-area-inset-top));
  transform: translateX(-50%);
  background: #1A1512;
  color: #fff;
  padding: 10px 16px;
  border-radius: 12px;
  font-size: 14px;
  max-width: 90vw;
  z-index: 30;
}
.tabs {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  background: rgba(255, 252, 248, .96);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid var(--garis);
  padding-bottom: env(safe-area-inset-bottom);
  z-index: 20;
}
.tabs a {
  display: flex;
  flex-direction: column;
  align-items: center;
  font-size: 11px;
  color: var(--lembut);
  text-decoration: none;
  padding: 8px 0 8px;
  font-weight: 600;
}
.tabs a .ic { font-size: 18px; line-height: 1.25 }
.tabs a.on { color: var(--merah); font-weight: 750 }

.crumb { font-size: 13px; color: var(--lembut); margin-bottom: 8px }
.crumb a { color: var(--lembut); text-decoration: none }
.crumb a:hover { color: var(--merah) }

.site-foot {
  max-width: 820px;
  margin: 28px auto 0;
  padding: 18px 16px 8px;
  text-align: center;
  color: var(--lembut);
  font-size: 13px;
  border-top: 1px solid var(--garis);
}
.site-foot .brand-f {
  font-weight: 750;
  color: var(--tinta);
  letter-spacing: -.02em;
  display: block;
  margin-bottom: 4px;
  font-size: 14px;
}
.noscript { padding: 24px; background: #F8E7C7 }

.miss { margin-top: 16px }
.miss li { margin: 8px 0; font-size: 14.5px }
.kicker {
  font-size: 12px;
  font-weight: 750;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--merah);
  margin: 0 0 4px;
}
.official { font-size: 12.5px; color: var(--lembut); margin-top: 20px; text-align: center }
.level-head .actions { margin-top: 14px }
.linkish { background: none; border: 0; color: var(--merah); font: inherit; font-weight: 650; cursor: pointer; padding: 8px 0; min-height: 44px }

.exg { display: flex; flex-wrap: wrap; align-items: flex-start; gap: 8px; }
.exg .btn.icon { margin-left: auto; }
.ph { align-items: center; }
.logo { text-indent: -999px; overflow: hidden; }

.site-foot .copy {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  color: var(--lembut);
}