:root{--bg: #0d0e16;--bg-2: #12131f;--surface: #181a29;--surface-2: #1f2236;--border: #2a2e45;--border-strong: #3a3f5e;--text: #eef0fb;--muted: #9aa0c0;--faint: #6b7099;--accent: #7c83ff;--accent-2: #a779ff;--accent-soft: rgba(124, 131, 255, .16);--good: #46d39a;--warn: #f5b14c;--danger: #ff6b81;--g-again: #ff6b81;--g-hard: #f5b14c;--g-ok: #5bd0e6;--g-easy: #46d39a;--radius: 18px;--radius-sm: 12px;--shadow: 0 10px 30px rgba(0, 0, 0, .4);--jp: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", "Yu Gothic", "Meiryo", system-ui, sans-serif;--ui: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:radial-gradient(1200px 600px at 50% -10%,#1a1c2e 0%,var(--bg) 60%);color:var(--text);font-family:var(--ui);-webkit-font-smoothing:antialiased;overscroll-behavior:none}button{font-family:inherit;cursor:pointer}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.app{max-width:540px;margin:0 auto;min-height:100%;display:flex;flex-direction:column;padding:env(safe-area-inset-top) 16px env(safe-area-inset-bottom)}.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 4px 8px}.brand{font-weight:800;letter-spacing:.3px;font-size:18px}.brand .dot{color:var(--accent)}.topbar .right{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px}.progress-rail{height:4px;background:var(--surface);border-radius:99px;overflow:hidden;margin:4px 4px 0}.progress-rail>span{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--accent-2));transition:width .3s ease}.content{flex:1;display:flex;flex-direction:column}.card{background:linear-gradient(180deg,var(--surface) 0%,var(--bg-2) 100%);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}.center-col{flex:1;display:flex;flex-direction:column;justify-content:center;gap:18px}.prompt{text-align:center;padding:28px 18px;min-height:180px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px}.prompt .kanji{font-family:var(--jp);font-size:64px;font-weight:700;line-height:1.15}.prompt .en{font-size:30px;font-weight:650;line-height:1.3}.prompt .sub{color:var(--muted);font-size:14px}.prompt-sentence{font-family:var(--jp);font-size:30px;line-height:1.9}.pill{display:inline-block;padding:4px 11px;border-radius:99px;font-size:12px;font-weight:700;background:var(--accent-soft);color:var(--accent);letter-spacing:.3px}.pill.new{background:#46d39a26;color:var(--good)}.hint{color:var(--faint);font-size:13px;text-align:center}ruby{ruby-align:center}rt{font-size:.5em;color:var(--accent-2);font-weight:600;-webkit-user-select:none;user-select:none}.b{color:#fff}.prompt-sentence .b{background:var(--accent-soft);border-radius:6px;padding:0 2px}.btn{border:1px solid var(--border-strong);background:var(--surface-2);color:var(--text);border-radius:var(--radius-sm);padding:14px 18px;font-size:16px;font-weight:600;transition:transform .06s ease,background .15s ease,border-color .15s ease,opacity .15s;width:100%}.btn:active{transform:scale(.975)}.btn-primary{background:linear-gradient(180deg,var(--accent),#6a6fee);border-color:transparent;color:#fff}.btn-primary:disabled{opacity:.5}.btn-ghost{background:transparent;border-color:var(--border);color:var(--muted)}.btn-row{display:flex;gap:10px}.options{display:flex;flex-direction:column;gap:10px}.option{text-align:left;line-height:1.35;display:flex;align-items:center;gap:12px}.option .idx{color:var(--faint);font-weight:700;min-width:18px}.option.correct{background:#46d39a29;border-color:var(--good);color:#d7ffe9}.option.wrong{background:#ff6b8124;border-color:var(--danger);color:#ffd9df}.option.dim{opacity:.45}.type-input{width:100%;padding:15px 16px;font-size:18px;background:var(--surface-2);color:var(--text);border:1px solid var(--border-strong);border-radius:var(--radius-sm)}.suggests{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.suggest{width:auto;padding:10px 14px;font-size:15px;border-radius:99px;background:var(--surface-2);border:1px solid var(--border-strong)}.suggest .jp{font-family:var(--jp);color:var(--accent-2);margin-right:7px;font-weight:700}.kanji-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.kanji-btn{font-family:var(--jp);font-size:26px;font-weight:700;padding:16px 8px}.blanks{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;min-height:56px;align-items:center}.blank{font-family:var(--jp);font-size:30px;font-weight:700;min-width:46px;height:56px;display:flex;align-items:center;justify-content:center;border-bottom:3px solid var(--border-strong);color:var(--text)}.blank.filled{border-bottom-color:var(--accent)}.blank.cursor{border-bottom-color:var(--accent-2);animation:blink 1s steps(2) infinite}@keyframes blink{50%{border-bottom-color:transparent}}.kana-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:16px}.kana-tile{font-family:var(--jp);font-size:24px;font-weight:700;padding:14px 4px}.grades{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.grade{padding:16px 6px;font-size:15px;font-weight:700;border:1px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--surface-2);color:var(--text)}.grade small{display:block;font-size:11px;font-weight:600;color:var(--faint);margin-top:3px}.grade.again{border-color:var(--g-again)}.grade.again:active{background:#ff6b812e}.grade.hard{border-color:var(--g-hard)}.grade.hard:active{background:#f5b14c2e}.grade.ok{border-color:var(--g-ok)}.grade.ok:active{background:#5bd0e62e}.grade.easy{border-color:var(--g-easy)}.grade.easy:active{background:#46d39a2e}.audio-btn{width:64px;height:64px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;background:var(--accent-soft);border:1px solid var(--border-strong);color:var(--accent)}.audio-btn svg{width:26px;height:26px}.audio-btn.playing{animation:pulse .6s ease}@keyframes pulse{0%{box-shadow:0 0 0 0 var(--accent-soft)}to{box-shadow:0 0 0 16px transparent}}.voice-row{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;max-width:440px}.voice-btn{display:inline-flex;align-items:center;gap:6px;width:auto;padding:8px 13px;border-radius:99px;font-size:13px;font-weight:600;background:var(--surface-2);border:1px solid var(--border);color:var(--muted);transition:transform .06s ease,background .15s,border-color .15s,color .15s}.voice-btn:active{transform:scale(.96)}.voice-btn svg{width:15px;height:15px;opacity:.85}.voice-btn.active{border-color:var(--accent);color:var(--text);background:var(--accent-soft)}.voice-btn.active svg{opacity:1;color:var(--accent)}.voice-btn.female.active{border-color:var(--accent-2)}.voice-btn.female.active svg{color:var(--accent-2)}.voice-btn.playing svg{animation:bob .5s ease}@keyframes bob{50%{transform:scale(1.25)}}.example{background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px 16px 14px;display:flex;flex-direction:column;gap:11px;align-items:center;text-align:center}.example-label{font-size:11px;text-transform:uppercase;letter-spacing:.09em;color:var(--faint);font-weight:700}.example-jp{font-family:var(--jp);font-size:21px;line-height:1.85}.example-jp .b{background:var(--accent-soft);border-radius:6px;padding:0 3px;color:#fff}.example-en{color:var(--muted);font-size:14px;line-height:1.4}.login-wrap{flex:1;display:flex;flex-direction:column;justify-content:center;gap:22px;padding:24px 4px}.login-hero{text-align:center}.login-hero h1{font-size:30px;margin:0 0 8px}.login-hero .jp{font-family:var(--jp);color:var(--accent-2);font-size:20px}.login-hero p{color:var(--muted);margin:6px 0 0;line-height:1.5}.error{color:var(--danger);font-size:14px;text-align:center;min-height:20px}.muted{color:var(--muted)}.actions{padding:14px 0 22px;display:flex;flex-direction:column;gap:10px}.fade-in{animation:fadein .28s ease}@keyframes fadein{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}.shake{animation:shake .34s}@keyframes shake{10%,90%{transform:translate(-2px)}30%,70%{transform:translate(5px)}50%{transform:translate(-7px)}}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.stat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px;text-align:center}.stat .n{font-size:28px;font-weight:800}.stat .l{color:var(--muted);font-size:12px;margin-top:4px}.stat.due .n{color:var(--accent)}.stat.new .n{color:var(--good)}.big-emoji{font-size:52px;text-align:center}.spinner{width:28px;height:28px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite;margin:30px auto}@keyframes spin{to{transform:rotate(360deg)}}