:root{--bg:#f5f3ee;--card:#ffffff;--ink:#26242b;--muted:#83808f;--accent:#3d4f9e;--accent-soft:#e9edfb;--border:#e3e1da;--gold:#b98a2e;--ok:#2e8b57;--bad:#c43d3d;--shadow:0 2px 12px rgba(38,36,43,0.08)}@media (prefers-color-scheme:dark){:root{--bg:#17181d;--card:#22242c;--ink:#e8e7ef;--muted:#9a97a8;--accent:#7d8fe0;--accent-soft:#2b3050;--border:#363843;--gold:#d4a94c;--bad:#e06060;--shadow:0 2px 12px rgba(0,0,0,0.35)}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-ui),-apple-system,"Segoe UI",Roboto,"Hiragino Sans","Yu Gothic UI","Meiryo",sans-serif;line-height:1.6;display:flex;flex-direction:column;min-height:100vh}.jp{font-family:var(--font-jp),"Yu Gothic UI","Hiragino Sans","Meiryo","MS Gothic",sans-serif}html[data-jpfont=sharp] .jp{font-family:var(--font-jp-sharp),"Yu Mincho","Hiragino Mincho ProN",serif}html[data-jpfont=play] .jp{font-family:var(--font-jp-play),var(--font-jp),"Yu Gothic 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rise{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}@keyframes pop{0%{opacity:0;transform:scale(.65)}to{opacity:1;transform:scale(1)}}.card{animation:rise .35s ease both}.big-char{animation:pop .25s ease both}h1{animation:rise .3s ease both}.subtitle{animation:rise .35s ease both}.kanji-map{animation:rise .4s ease both}.kcell{transition:transform .08s ease,background .3s ease,box-shadow .3s ease}.btn{transition:transform .12s ease,box-shadow .12s ease,opacity .15s}.btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(0,0,0,.15)}.btn:active{transform:translateY(0)}.quiz-option{transition:transform .1s ease,background .15s,border-color .15s}.quiz-option:not(:disabled):hover{transform:translateY(-1px)}.ktest-card{max-width:520px;margin:0 auto}.ktest-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}.ktest-form{justify-content:center}.ktest-prompt{text-align:center;font-size:1.5rem;font-weight:700;margin:18px 0 10px}.ktest-choices{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:10px;gap:10px;margin:8px 0}.ktest-choice{font-size:2rem;padding:14px 6px;border:1.5px solid var(--border);border-radius:14px;background:var(--card);color:var(--ink);cursor:pointer;font-family:inherit;transition:all .12s}.ktest-choice:not(:disabled):hover{border-color:var(--accent);transform:translateY(-2px)}.ktest-choice.correct{background:var(--ok);border-color:var(--ok);color:#fff}.ktest-choice.wrong{background:var(--bad);border-color:var(--bad);color:#fff}@media (max-width:640px){.ktest-choices{grid-template-columns:repeat(2,1fr)}}.ktest-word{font-size:2.6rem;cursor:pointer}.ktest-ok{color:var(--ok);font-weight:700;margin:10px 0 0}.ktest-answer,.ktest-no,.ktest-ok{text-align:center}.ktest-answer{display:flex;flex-direction:column;gap:4px;margin-top:8px;padding:10px;border:1px solid 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