:root {
  color-scheme: light;
  --ink: #482e3d;
  --muted: #765969;
  --accent: #a3426c;
  --line: #ecd6df;
  --background: #fff6f8;
  --surface: #fffcfd;
  --soft: #fbe7ee;
  --focus: #84395e;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--background);
  color: var(--ink);
}
* { box-sizing: border-box; }
body { margin: 0; }
[hidden] { display: none !important; }
button, a { -webkit-tap-highlight-color: transparent; }
button, input, select { font: inherit; }
button { cursor: pointer; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid var(--focus); outline-offset: 4px; }
.site-header { max-width: 1180px; margin: auto; padding: 24px 32px; display: flex; justify-content: space-between; align-items: center; gap: 16px; border-bottom: 1px solid var(--line); }
.brand { color: var(--ink); font-weight: 750; text-decoration: none; display: flex; align-items: center; gap: 12px; }
.brand span { background: var(--accent); color: white; padding: 4px 12px; border-radius: 10px; font-size: 25px; }
.badge { border: 1px solid var(--line); border-radius: 20px; padding: 6px 12px; font-size: 13px; }
.header-navigation { display: flex; gap: 8px; }
.header-navigation button { border: 0; border-radius: 8px; padding: 10px 14px; background: transparent; color: var(--ink); }
.header-navigation button[aria-current="page"] { background: var(--accent); color: white; }
.header-navigation button:disabled { opacity: .5; cursor: wait; }
.practice-panel { padding: 28px; border: 1px solid var(--line); border-radius: 16px; background: var(--surface); }
.practice-panel h2 { font-size: 30px; margin-top: 8px; }
.practice-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; margin: 24px 0; }
.practice-fields label { display: block; font-weight: 650; font-size: 14px; margin-bottom: 8px; }
.practice-fields select, .practice-fields input { width: 100%; min-width: 0; padding: 12px; color: var(--ink); background: var(--background); border: 1px solid var(--line); border-radius: 8px; }
#practice-chapter { margin-top: 4px; }
#practice-chapter-count { margin-bottom: 0; font-size: 13px; }
#practice-chapter-field { position: relative; min-width: 0; }
.select2-container { max-width: 100%; }
.select2-container--default .select2-selection--single { height: auto; min-height: 46px; padding: 8px; border-color: var(--line); border-radius: 8px; background: var(--background); }
.select2-container--default .select2-selection--single .select2-selection__rendered { color: var(--ink); white-space: normal; overflow-wrap: anywhere; padding-right: 24px; }
.select2-container--default .select2-selection--single .select2-selection__arrow { top: 10px; right: 8px; }
.select2-dropdown { border-color: var(--accent); background: var(--surface); color: var(--ink); }
.select2-container--default .select2-results__option[aria-selected="true"] { background: var(--soft); }
.select2-container--default .select2-results__option--highlighted[aria-selected] { color: white; background: var(--accent); }
.select2-container--default .select2-search--dropdown .select2-search__field { border-color: var(--line); color: var(--ink); background: var(--background); }
.select2-container--default.select2-container--disabled .select2-selection--single { background: var(--soft); }
.select2-search__field:focus-visible { outline-offset: 0; }
.primary-button:disabled { opacity: .5; cursor: not-allowed; }
#practice-chapter-field { grid-column: 1 / -1; }
main { max-width: 1180px; margin: auto; padding: 40px 32px; }
.intro { max-width: 640px; margin-bottom: 40px; }
.eyebrow { color: var(--accent); font-size: 12px; font-weight: 750; text-transform: uppercase; letter-spacing: .12em; }
h1 { font-size: clamp(36px, 5vw, 58px); line-height: 1.1; letter-spacing: -.04em; margin: 14px 0 20px; }
p { line-height: 1.65; color: var(--muted); }
.layout { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 44px; }
.sidebar-title { font-size: 14px; margin: 0 0 14px; }
#chapters { display: grid; gap: 10px; max-height: 460px; overflow-y: auto; padding: 4px; }
aside label { display: block; font-size: 12px; font-weight: 650; margin: 16px 0 6px; }
aside input, aside select { width: 100%; min-width: 0; padding: 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); color: var(--ink); }
#chapter-count { font-size: 12px; }
.chapter-button { padding: 14px; border: 1px solid var(--line); border-radius: 12px; text-align: left; background: transparent; color: var(--ink); }
.chapter-button span { display: block; margin-top: 5px; font-size: 12px; }
.chapter-button[aria-current="true"] { background: var(--accent); color: white; border-color: var(--accent); }
.reading-guide { margin-top: 28px; padding: 18px; background: var(--soft); border-radius: 12px; }
.reading-guide h2 { font-size: 14px; margin-top: 0; }
.reading-guide p { font-size: 13px; margin-bottom: 0; }
.chapter-header h2 { font-size: 30px; margin: 6px 0; letter-spacing: -.025em; }
.chapter-header p:first-child { margin-top: 0; }
.chapter-header > p:last-child { margin-bottom: 24px; }
.cards { display: grid; gap: 16px; }
.kanji-card { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 24px; display: grid; grid-template-columns: 104px minmax(0, 1fr); gap: 24px; }
.character { display: grid; place-items: center; align-self: start; min-height: 104px; background: #fff; color: #000; border-radius: 12px; font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif; font-size: 64px; }
.kanji-card h3 { margin: 0 0 10px; font-size: 22px; overflow-wrap: anywhere; }
.kanji-meta, .missing-reading { font-size: 12px; margin: 0 0 14px; }
.readings { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.readings h4 { margin: 0 0 8px; font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.readings ul { list-style: none; margin: 0; padding: 0; }
.readings li { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px; margin: 6px 0; overflow-wrap: anywhere; }
.readings > div { min-width: 0; }
.kana { font-size: 19px; }
.romaji { color: var(--muted); font-size: 14px; }
.chapter-navigation { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: 24px; }
.chapter-navigation button, #retry { border: 1px solid var(--accent); background: var(--surface); color: var(--accent); border-radius: 8px; padding: 10px 14px; }
.chapter-navigation button:disabled { opacity: .45; cursor: default; }
#page-count { font-size: 13px; white-space: nowrap; }
.catalog-note { margin-top: 40px; font-size: 12px; border-top: 1px solid var(--line); padding-top: 20px; }
.catalog-note a { color: var(--accent); }
.quiz-invitation { margin-top: 24px; padding: 24px; border-radius: 16px; background: var(--soft); }
.quiz-invitation h3 { margin-top: 0; }
.primary-button { background: var(--accent); color: white; border: 1px solid var(--accent); padding: 12px 20px; border-radius: 8px; }
.quiz-panel { padding: 24px; border: 1px solid var(--line); border-radius: 16px; background: var(--surface); }
.quiz-topline { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px; }
.quiz-topline h3 { margin: 0; }
.quiz-topline button { background: none; border: 1px solid var(--line); border-radius: 8px; padding: 8px; color: var(--ink); }
.quiz-character { text-align: center; font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif; font-size: 90px; padding: 16px; }
.quiz-meaning { text-align: center; font-size: 28px; font-weight: 650; padding: 28px 0; overflow-wrap: anywhere; }
.quiz-option.kanji-option { text-align: center; font-size: 42px; }
.quiz-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.quiz-option { padding: 16px; background: var(--background); color: var(--ink); border: 2px solid var(--line); border-radius: 10px; text-align: left; overflow-wrap: anywhere; }
.quiz-option:hover:not(:disabled) { border-color: var(--accent); }
.quiz-option:disabled { cursor: default; opacity: 1; }
.quiz-option.correct { border-color: #27633d; background: #e4f2e4; }
.quiz-option.incorrect { border-color: #a43e35; background: #fbe9e5; }
#quiz-feedback { min-height: 28px; font-weight: 650; color: var(--ink); }
#quiz-meter { width: 100%; accent-color: var(--accent); }
#quiz-score { font-size: 24px; }
#quiz-review { padding-left: 20px; line-height: 1.7; overflow-wrap: anywhere; }
#quiz-review li { margin-bottom: 12px; }
@media (max-width: 760px) {
  .site-header { padding: 20px; flex-wrap: wrap; }
  main { padding: 28px 20px; }
  .layout { grid-template-columns: 1fr; gap: 28px; }
  #chapters { grid-template-columns: repeat(2, minmax(0, 1fr)); max-height: 240px; }
  .chapter-button { font-size: 13px; padding: 10px; }
  .reading-guide { margin-top: 16px; }
  .intro { margin-bottom: 28px; }
}
@media (max-width: 440px) {
  .badge { display: none; }
  .kanji-card { padding: 18px; gap: 16px; grid-template-columns: 64px minmax(0, 1fr); }
  .character { min-height: 72px; font-size: 46px; }
  .readings { grid-template-columns: 1fr; gap: 12px; }
  .chapter-navigation button { padding: 10px; font-size: 12px; }
  .quiz-panel { padding: 18px; }
  .quiz-options { grid-template-columns: 1fr; }
  .practice-fields { grid-template-columns: 1fr; }
  .practice-panel { padding: 18px; }
}