:root{--bg: #f6f7f5;--surface: #ffffff;--text: #1c2321;--muted: #5d6b66;--line: #dfe5e2;--accent: #0f766e;--accent-ink: #ffffff;--ok: #15803d;--ok-bg: #dcfce7;--ng: #b91c1c;--ng-bg: #fee2e2;--amber: #f59e0b;--none: #e5e9e7}@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg: #111615;--surface: #1b2220;--text: #e8eeec;--muted: #9aa8a3;--line: #2c3633;--accent: #2dd4bf;--accent-ink: #052e29;--ok: #4ade80;--ok-bg: #123524;--ng: #f87171;--ng-bg: #3b1a1a;--none: #2a3331}}:root[data-theme=dark]{--bg: #111615;--surface: #1b2220;--text: #e8eeec;--muted: #9aa8a3;--line: #2c3633;--accent: #2dd4bf;--accent-ink: #052e29;--ok: #4ade80;--ok-bg: #123524;--ng: #f87171;--ng-bg: #3b1a1a;--none: #2a3331}*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--text)}body{font:16px/1.6 system-ui,-apple-system,Hiragino Sans,Noto Sans JP,Noto Sans KR,sans-serif;-webkit-text-size-adjust:100%}.app{max-width:560px;margin:0 auto;padding:16px 16px calc(88px + env(safe-area-inset-bottom))}h1{font-size:1.35rem;margin:0}h2{font-size:1.05rem;margin:0 0 6px}p{margin:6px 0}.muted{color:var(--muted)}.small{font-size:.85rem}.center{text-align:center}.hidden{display:none}.top{display:flex;align-items:center;justify-content:space-between;padding:4px 0 12px}.card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:16px;margin-bottom:12px}.card.locked{opacity:.55}.hero .stats{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;text-align:center;margin-bottom:14px}.stats b{display:block;font-size:1.5rem;line-height:1.2}.stats span{font-size:.75rem;color:var(--muted)}.tip{background:var(--bg);border-radius:10px;padding:10px 12px;font-size:.9rem}.notice{background:var(--ok-bg);color:var(--ok);padding:10px 12px;border-radius:10px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:8px 16px;border-radius:12px;border:1px solid var(--line);background:var(--surface);color:var(--text);font:inherit;text-decoration:none;cursor:pointer}.btn.primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent);font-weight:600}.btn.danger{color:var(--ng)}.btn.big{width:100%;min-height:56px;font-size:1.1rem}.btn.icon{min-width:44px;padding:8px}.btn:focus-visible,.choice:focus-visible,a:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.link{color:var(--accent);text-decoration:none}.row{display:flex;align-items:center}.gap{gap:10px}.wrap{flex-wrap:wrap}.bar{height:10px;border-radius:99px;background:var(--none);overflow:hidden;margin:8px 0 4px}.bar.thin{height:6px;margin:0 0 16px}.bar-fill{height:100%;background:var(--accent);border-radius:99px;transition:width .3s}.ask{text-align:center;color:var(--muted);margin:0}.prompt{text-align:center;padding:16px 0 20px}.glyph{font-size:6.5rem;line-height:1.15;font-weight:500}.reading-prompt{font-size:2.4rem;font-weight:600;padding:28px 0}.choices{display:grid;grid-template-columns:1fr 1fr;gap:10px}.choice{position:relative;min-height:72px;border-radius:14px;border:2px solid var(--line);background:var(--surface);color:var(--text);font:inherit;font-size:1.35rem;cursor:pointer;padding:10px}.choice.glyph{font-size:2.4rem}.choice .num{position:absolute;top:4px;left:8px;font-size:.7rem;color:var(--muted)}.choice.correct{border-color:var(--ok);background:var(--ok-bg)}.choice.wrong{border-color:var(--ng);background:var(--ng-bg)}.choice:disabled{cursor:default}.feedback{margin-top:16px;display:grid;gap:12px}.explain{border-radius:14px;padding:12px 14px;border:1px solid var(--line);background:var(--surface)}.explain.ok .verdict{color:var(--ok)}.explain.ng .verdict{color:var(--ng)}.verdict{font-weight:700}.ex-row{display:flex;align-items:center;gap:12px;margin-top:6px}.ex-row>div{flex:1}.ex-glyph{font-size:2.6rem;line-height:1}.ex-glyph.sm{font-size:1.8rem}.ex-read{font-size:1.15rem;font-weight:600}.ipa{color:var(--muted);font-weight:400}.score{font-size:3rem;font-weight:700}.unlock{font-weight:700;color:var(--accent)}.wrong-list{list-style:none;padding:0;margin:8px 0 0;display:grid;gap:8px}.wrong-list li{display:flex;align-items:center;gap:12px}.tabs{position:fixed;left:0;right:0;bottom:0;display:flex;justify-content:center;gap:4px;background:var(--surface);border-top:1px solid var(--line);padding:8px 12px calc(8px + env(safe-area-inset-bottom))}.tabs a{flex:1;max-width:180px;text-align:center;padding:10px;border-radius:10px;color:var(--muted);text-decoration:none}.tabs a.on{background:var(--bg);color:var(--accent);font-weight:700}.tiles{display:flex;flex-wrap:wrap;gap:4px;margin-top:8px}.tile{display:inline-flex;align-items:center;justify-content:center;min-width:34px;height:34px;padding:0 4px;border-radius:8px;font-size:1rem;background:var(--none);color:var(--text)}.tile.missed{background:var(--ng-bg);color:var(--ng)}.tile.learning{background:#fde68a;color:#422006}.tile.mastered{background:#86efac;color:#052e16}.tile.strong{background:#16a34a;color:#fff}.legend{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:.8rem;color:var(--muted);margin-top:8px}.legend .tile{min-width:18px;height:18px}.chart{display:flex;align-items:flex-end;gap:4px;height:110px;margin-top:8px}.col{flex:1;display:flex;flex-direction:column;align-items:center;height:100%;justify-content:flex-end}.col-bar{width:100%;background:var(--none);border-radius:4px 4px 0 0;display:flex;align-items:flex-end;min-height:2px}.col-ok{width:100%;background:var(--accent);border-radius:4px 4px 0 0}.col-label{font-size:.6rem;color:var(--muted);margin-top:2px}.opt{display:inline-flex;align-items:center;gap:8px;min-height:44px}.opt.block{display:flex;align-items:flex-start;padding:6px 0}.opt small{display:block}.field{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:44px}select,input[type=text]{font:inherit;padding:8px 10px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--text);min-height:44px}input[type=radio],input[type=checkbox]{width:22px;height:22px;accent-color:var(--accent)}.code{font:600 1.05rem/1.4 ui-monospace,Menlo,Consolas,monospace;letter-spacing:.04em;padding:10px;background:var(--bg);border-radius:10px;margin:8px 0;word-break:break-all}.code-input{flex:1;min-width:0}@media(prefers-reduced-motion:reduce){.bar-fill{transition:none}}@media(max-width:380px){.glyph{font-size:5rem}}.small-btn{min-height:38px;padding:4px 14px;margin-top:8px;font-size:.9rem}h3{font-size:.95rem;margin:14px 0 4px}.steps{padding-left:1.3em;margin:6px 0}.steps li{margin:6px 0}.notice.ng{background:var(--ng-bg);color:var(--ng)}