@import "https://fonts.googleapis.com/css2?family=Zen+Kaku+Gothic+New:wght@400;500;700;900&display=swap";:root{--ink:#221d17;--ink-soft:#544a3c;--muted:#8a7b63;--paper:#e9dfc7;--card:#f4ecd8;--card-2:#efe4cb;--line:#c9b98e;--line-soft:#dccfa9;--accent:#b23a29;--accent-dark:#8c2b1d;--accent-ink:#fbf2e2;--indigo:#33465c;--good:#3c6e4a;--bad:#b23a29;--radius:6px;--radius-lg:10px;--shadow:0 1px 0 #221d170f, 0 8px 24px -12px #221d1740;--font-family:"Zen Kaku Gothic New", sans-serif}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--paper);color:var(--ink);font-family:var(--font-family);-webkit-font-smoothing:antialiased;min-height:100dvh}button{font-family:inherit}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.001ms!important;animation-duration:.001ms!important;animation-iteration-count:1!important}}.app-root{min-height:100dvh}.container{max-width:760px;padding:calc(28px + env(safe-area-inset-top)) calc(18px + env(safe-area-inset-right)) calc(64px + env(safe-area-inset-bottom)) calc(18px + env(safe-area-inset-left));margin:0 auto;position:relative}.hero{text-align:center;margin-bottom:26px}.eyebrow{letter-spacing:.22em;text-transform:uppercase;color:var(--accent);margin-bottom:10px;font-size:.72rem;font-weight:700}.title{letter-spacing:.04em;color:var(--ink);margin:0 0 6px;font-family:inherit;font-size:clamp(2.6rem,9vw,4rem);font-weight:900}.sub{color:var(--ink-soft);margin:0 0 4px;font-size:1rem;font-weight:700}.header-actions{top:calc(12px + env(safe-area-inset-top));right:calc(12px + env(safe-area-inset-right));align-items:center;gap:8px;display:flex;position:absolute}.btn-stop-drill{color:var(--accent);min-height:44px;padding:10px 12px;font-size:.8rem}.icon-btn{border-radius:var(--radius);min-width:44px;min-height:44px;color:var(--ink-soft);cursor:pointer;background:0 0;border:none;justify-content:center;align-items:center;font-size:1.15rem;display:inline-flex;position:relative}.icon-btn:hover,.icon-btn:focus-visible{background:var(--card-2);color:var(--ink)}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:22px 20px;position:relative}.card-center{text-align:center;background:var(--card)}.field-group{margin-bottom:20px}.field-group:last-child{margin-bottom:0}.field-group-row{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:20px;display:flex}.label{letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft);margin-bottom:8px;font-size:.72rem;font-weight:700;display:block}.label-inline{margin-bottom:0}.label-tight{margin-top:8px}.label-tight-lg{margin-top:16px}.input-number{text-align:center;border:1px solid var(--line);border-radius:var(--radius);background:var(--card);width:90px;color:var(--ink);min-height:44px;padding:10px;font-family:inherit;font-size:1.1rem;font-weight:700}.select{border-radius:var(--radius);border:1px solid var(--line);background-color:var(--card);appearance:none;width:100%;min-height:44px;color:var(--ink);background-image:url("data:image/svg+xml;utf8,<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"14\" height=\"14\" viewBox=\"0 0 24 24\"><path fill=\"%23544a3c\" d=\"M7 10l5 5 5-5z\"/></svg>");background-position:right 12px center;background-repeat:no-repeat;padding:12px;font-family:inherit;font-size:.95rem}.select:focus,.input-number:focus,.answer-input:focus{outline:2px solid var(--indigo);outline-offset:1px}.segmented{border:1px solid var(--line);border-radius:var(--radius);display:flex;overflow:hidden}.seg-btn{background:var(--card-2);min-height:44px;color:var(--ink-soft);cursor:pointer;border:none;border-right:1px solid var(--line);flex:1;padding:12px 8px;font-size:.85rem;font-weight:700}.seg-btn:last-child{border-right:none}.seg-active{background:var(--indigo);color:var(--accent-ink)}input[type=checkbox]{width:20px;height:20px;accent-color:var(--accent);cursor:pointer;flex-shrink:0}.divider{border:0;border-top:1px solid var(--line-soft);margin:20px 0}.btn-primary{border-radius:var(--radius);border:1px solid var(--accent);cursor:pointer;background:var(--accent);width:100%;min-height:48px;color:var(--accent-ink);padding:14px 16px;font-size:.92rem;font-weight:700}.btn-primary:hover{background:var(--accent-dark)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-start{margin-top:24px;padding:16px;font-size:1.2rem}.btn-main-menu{margin-top:20px}.btn-primary-compact{flex:none;width:auto}.btn-ghost{color:var(--ink-soft);border-radius:var(--radius);cursor:pointer;background:0 0;border:1px solid #0000;padding:10px 16px;font-weight:700}.btn-ghost:hover{background:var(--card-2)}.quiz-top{justify-content:space-between;align-items:baseline;margin-bottom:14px;padding:0 2px;display:flex}.streak-label{color:var(--accent);font-size:.85rem;font-weight:700}.progress-track{background:var(--card-2);border:1px solid var(--line);border-radius:999px;height:10px;margin-bottom:14px;overflow:hidden}.progress-fill{background:var(--good);border-radius:999px;height:100%;transition:width .25s}.stimulus{letter-spacing:.02em;word-break:keep-all;font-size:clamp(2rem,9vw,2.7rem);font-weight:700;line-height:1.5}.stimulus ruby rt{color:var(--ink-soft);font-size:.36em;font-weight:700}.stimulus-row{justify-content:center;align-items:flex-start;gap:6px;display:flex}.instruction{color:var(--indigo);margin-top:16px;font-size:1.4rem;font-weight:700}.answer-row{flex-wrap:wrap;gap:10px;margin-top:22px;display:flex}.answer-input{border-radius:var(--radius);border:1px solid var(--line);background:var(--card);min-width:0;min-height:48px;color:var(--ink);letter-spacing:.05em;flex:160px;padding:12px 14px;font-size:1.15rem;font-weight:500}.answer-input:disabled{background:var(--card-2);color:var(--muted)}.feedback{border-top:1px dashed var(--line);text-align:left;align-items:center;gap:16px;margin-top:20px;padding-top:18px;display:flex}.feedback-body{flex:1;min-width:0}.feedback-correct-label{color:var(--good);font-weight:700}.feedback-answer-block{margin-bottom:12px}.stamp{flex-shrink:0;justify-content:center;align-items:center;font-family:inherit;font-size:3.5rem;font-weight:800;line-height:1;animation:.28s ease-out stamp-in;display:flex;transform:rotate(-8deg)}.stamp-good{color:var(--good)}.stamp-bad{color:var(--bad);transform:rotate(6deg)}@keyframes stamp-in{0%{opacity:0;transform:scale(1.6)rotate(-8deg)}to{opacity:1;transform:scale(1)rotate(-8deg)}}.correct-kana{margin-top:2px;font-size:1.3rem;font-weight:700;display:block}.correct-romaji{color:var(--muted);font-size:.78rem;font-weight:400}.score-big{color:var(--accent);margin-bottom:6px;font-size:3rem;font-weight:800}.missed-block{text-align:left;margin-top:20px}.missed-list{padding-left:20px}.missed-item{margin-bottom:8px}.explanation-box{border-radius:var(--radius);border:1px solid var(--line-soft);background:#fff6;margin-top:16px;padding:12px 16px}.explanation-title{text-transform:uppercase;margin-bottom:4px;font-size:.8rem;font-weight:700}.explanation-list{color:var(--ink);margin:0;padding-left:20px;font-size:.9rem;line-height:1.5}.explanation-list li{margin-bottom:6px}.ruby-hover rt{opacity:0;transition:opacity .2s}.ruby-hover:hover rt,.ruby-hover:active rt{opacity:1}.translation,.translation-hover{color:var(--muted);text-align:center;margin-top:4px;font-size:.9rem;font-weight:500}.translation-hover{opacity:0;transition:opacity .2s}.card-center:hover .translation-hover,.card-center:active .translation-hover{opacity:1}.hint-wrap{flex-shrink:0;margin-top:6px;position:relative}.hint-btn{border:1px solid var(--muted);width:22px;height:22px;color:var(--muted);cursor:pointer;opacity:.6;background:0 0;border-radius:50%;justify-content:center;align-items:center;padding:0;font-size:.7rem;font-weight:700;line-height:1;display:flex;position:relative}.hint-btn:after{content:"";position:absolute;inset:-11px}.hint-btn:hover,.hint-btn:focus-visible{opacity:1;border-color:var(--indigo);color:var(--indigo);outline:none}.hint-tooltip{background:var(--ink);color:var(--card);border-radius:var(--radius);white-space:nowrap;z-index:10;box-shadow:var(--shadow);padding:6px 10px;font-size:.75rem;font-weight:600;position:absolute;top:26px;right:0}.checkbox-grid{grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:14px 12px;display:grid}.checkbox-label{cursor:pointer;align-items:center;gap:8px;min-height:28px;font-size:.95rem;font-weight:500;display:flex}.form-warning-tooltip{background:var(--accent);color:var(--accent-ink);border-radius:var(--radius);margin-top:8px;padding:10px 12px;font-size:.85rem;font-weight:500;animation:.15s ease-out warning-fade-in}@keyframes warning-fade-in{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.settings-columns{grid-template-columns:1fr;gap:24px;display:grid}@media (width>=680px){.settings-columns{grid-template-columns:1fr 1fr}}.category-header{margin-bottom:8px}.category-toggle{gap:10px}.category-title{font-size:1.05rem;font-weight:700}.section-muted{opacity:.45}.theme-selector{grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:10px;display:grid}.theme-swatch{border-radius:var(--radius);border:1px solid var(--line);background:var(--card-2);cursor:pointer;min-height:48px;color:var(--ink-soft);text-align:left;align-items:center;gap:10px;padding:10px 12px;font-size:.85rem;font-weight:600;display:flex}.theme-swatch-active{border-color:var(--indigo);color:var(--ink);box-shadow:0 0 0 2px var(--indigo) inset}.theme-swatch-preview{border:1px solid var(--line);border-radius:50%;flex-shrink:0;width:22px;height:22px;display:inline-flex;overflow:hidden}.theme-swatch-dot{width:50%;height:100%}.theme-swatch-dot-1{background:var(--swatch-a,var(--accent))}.theme-swatch-dot-2{background:var(--swatch-b,var(--indigo))}[data-swatch=a] .theme-swatch-dot-1,.theme-swatch-preview[data-swatch=a] .theme-swatch-dot-1{background:#b23a29}.theme-swatch-preview[data-swatch=a] .theme-swatch-dot-2{background:#33465c}.theme-swatch-preview[data-swatch=b] .theme-swatch-dot-1{background:#14171c}.theme-swatch-preview[data-swatch=b] .theme-swatch-dot-2{background:#5b8def}.theme-swatch-preview[data-swatch=c] .theme-swatch-dot-1{background:#16141f}.theme-swatch-preview[data-swatch=c] .theme-swatch-dot-2{background:#9d7cf5}.theme-swatch-preview[data-swatch=d] .theme-swatch-dot-1{background:#58cc02}.theme-swatch-preview[data-swatch=d] .theme-swatch-dot-2{background:#1cb0f6}.sheet-overlay{z-index:1000;background:#00000080;justify-content:center;align-items:center;padding:24px;display:flex;position:fixed;inset:0}.sheet-content{background:var(--card);width:100%;max-width:760px;max-height:88dvh;padding-bottom:env(safe-area-inset-bottom);border-radius:18px;flex-direction:column;display:flex;box-shadow:0 20px 50px -12px #00000059}.sheet-drag-zone{touch-action:none;flex-shrink:0}.sheet-grabber{background:var(--line);border-radius:999px;width:40px;height:4px;margin:10px auto 4px}.sheet-header{border-bottom:1px solid var(--line-soft);justify-content:space-between;align-items:center;padding:4px 16px 12px;display:flex}.sheet-header h3{margin:0;font-size:1.1rem}.sheet-body{-webkit-overflow-scrolling:touch;padding:16px;overflow-y:auto}.sheet-footer{padding:12px 16px calc(12px + env(safe-area-inset-bottom));border-top:1px solid var(--line-soft);flex-shrink:0}.fullpage{background:var(--paper);z-index:1000;flex-direction:column;display:flex;position:fixed;inset:0}.fullpage-header{padding:calc(10px + env(safe-area-inset-top)) calc(10px + env(safe-area-inset-right)) 10px calc(10px + env(safe-area-inset-left));border-bottom:1px solid var(--line-soft);flex-shrink:0;align-items:center;gap:8px;display:flex}.fullpage-header h3{text-align:center;flex:1;margin:0;font-size:1.1rem}.fullpage-header-spacer{flex-shrink:0;width:44px}.fullpage-body{-webkit-overflow-scrolling:touch;padding:16px calc(16px + env(safe-area-inset-right)) 16px calc(16px + env(safe-area-inset-left));flex:1;width:100%;max-width:760px;margin:0 auto;overflow-y:auto}.fullpage-footer{padding:12px 16px calc(12px + env(safe-area-inset-bottom));border-top:1px solid var(--line-soft);flex-shrink:0}.settings-modal-actions{gap:12px;display:flex}.settings-modal-btn{flex:1}.app-root-fullbleed{height:100dvh;overflow:hidden}.flashcard-screen{background:var(--paper);height:100dvh;color:var(--ink);flex-direction:column;display:flex}.flashcard-topbar{padding:calc(10px + env(safe-area-inset-top)) calc(14px + env(safe-area-inset-right)) 10px calc(14px + env(safe-area-inset-left));flex-shrink:0;align-items:center;gap:12px;display:flex}.flashcard-progress{color:var(--ink);font-size:.85rem;font-weight:700}.flashcard-streak{color:var(--accent);text-align:right;flex:1;font-size:.85rem;font-weight:700}.flashcard-topbar-actions{align-items:center;gap:4px;display:flex}.flashcard-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);text-align:center;-webkit-overflow-scrolling:touch;touch-action:pan-y;flex-direction:column;flex:1;justify-content:center;align-items:center;min-height:0;margin:0 14px;padding:24px 20px;display:flex;overflow-y:auto}.flashcard-stimulus{margin-top:10px;font-size:clamp(2.2rem,11vw,3.4rem);font-weight:700}.flashcard-instruction{color:var(--indigo);margin-top:18px;font-size:1.3rem;font-weight:700}.flashcard-result{width:100%;margin-top:20px}.flashcard-answer{margin:10px 0}.flashcard-swipe-hint{color:var(--muted);text-transform:uppercase;letter-spacing:.08em;margin-top:14px;font-size:.75rem}.flashcard-swipe-hint-touch{display:none}.flashcard-swipe-hint-pointer{display:block}@media (pointer:coarse){.flashcard-swipe-hint-touch{display:block}.flashcard-swipe-hint-pointer{display:none}}.theme-quickswitch-wrap{position:relative}.theme-popover{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);z-index:50;flex-direction:column;gap:8px;min-width:200px;padding:10px;display:flex;position:absolute;top:calc(100% + 8px);right:0}.flashcard-input-row{padding:14px calc(14px + env(safe-area-inset-right)) calc(14px + env(safe-area-inset-bottom)) calc(14px + env(safe-area-inset-left));flex-shrink:0;gap:10px;display:flex}[data-theme=c] .flashcard-screen .answer-input{background:var(--card-2)}[data-theme=c] .flashcard-screen .explanation-box{background:#ffffff0f}[data-theme=a]{--ink:#221d17;--ink-soft:#544a3c;--muted:#8a7b63;--paper:#e9dfc7;--card:#f4ecd8;--card-2:#efe4cb;--line:#c9b98e;--line-soft:#dccfa9;--accent:#b23a29;--accent-dark:#8c2b1d;--accent-ink:#fbf2e2;--indigo:#33465c;--good:#3c6e4a;--bad:#b23a29;--radius:6px;--radius-lg:10px;--shadow:0 1px 0 #221d170f, 0 8px 24px -12px #221d1740}[data-theme=a] .card-center,[data-theme=a] .flashcard-card{background:repeating-linear-gradient(90deg, transparent, transparent 39px, var(--line-soft) 39px, var(--line-soft) 40px), var(--card)}[data-theme=b]{--ink:#e8eaf0;--ink-soft:#b4bac7;--muted:#7b8496;--paper:#14171c;--card:#1c2027;--card-2:#242832;--line:#2e333d;--line-soft:#262a33;--accent:#5b8def;--accent-dark:#3f6fd1;--accent-ink:#fff;--indigo:#b4bac7;--good:#34d399;--bad:#f87171;--radius:10px;--radius-lg:14px;--shadow:0 1px 0 #0006, 0 12px 30px -14px #0009}[data-theme=b] .stamp{animation:none;transform:none}[data-theme=b] .select{background-image:url("data:image/svg+xml;utf8,<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"14\" height=\"14\" viewBox=\"0 0 24 24\"><path fill=\"%23b4bac7\" d=\"M7 10l5 5 5-5z\"/></svg>")}[data-theme=b] .explanation-box{background:#ffffff0f}[data-theme=c]{--ink:#ece9f7;--ink-soft:#bcb6d6;--muted:#8b84a8;--paper:#241f36;--card:#2f2a45;--card-2:#3a3350;--line:#453d5e;--line-soft:#362f4d;--accent:#8a68f2;--accent-dark:#6a49dc;--accent-ink:#fff;--indigo:#bcb6d6;--good:#34d399;--bad:#f87171;--radius:14px;--radius-lg:20px;--shadow:0 10px 30px -12px #00000080}[data-theme=c] .select{background-image:url("data:image/svg+xml;utf8,<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"14\" height=\"14\" viewBox=\"0 0 24 24\"><path fill=\"%23bcb6d6\" d=\"M7 10l5 5 5-5z\"/></svg>")}[data-theme=c] .flashcard-card{border-top:4px solid var(--accent)}[data-theme=c] .flashcard-screen{--ink:#e9e6f5;--ink-soft:#b6b0cf;--muted:#7d7799;--paper:#16141f;--card:#201d2e;--card-2:#2a2640;--line:#362f4d;--line-soft:#2c2740;--accent:#9d7cf5;--accent-dark:#7c5cf0;--accent-ink:#fff;--indigo:#b6b0cf;--good:#34d399;--bad:#f87171}[data-theme=d]{--ink:#1f2933;--ink-soft:#3c4753;--muted:#8b95a1;--paper:#dbeeff;--card:#fff;--card-2:#c8e6ff;--line:#a8d4f5;--line-soft:#c3e2f5;--accent:#ff9600;--accent-dark:#e08600;--accent-ink:#fff;--indigo:#1cb0f6;--good:#58cc02;--bad:#ff4b4b;--radius:16px;--radius-lg:20px;--shadow:0 4px 0 var(--line), 0 10px 24px -8px #1cb0f659}[data-theme=d] .btn-primary{box-shadow:0 4px 0 var(--accent-dark);border-width:0;transition:transform 80ms,box-shadow 80ms;transform:translateY(0)}[data-theme=d] .btn-primary:active{box-shadow:0 1px 0 var(--accent-dark);transform:translateY(3px)}[data-theme=d] .seg-active{background:var(--indigo)}