:root{--bg: #f4f6f8;--card: #ffffff;--ink: #22303c;--muted: #71808d;--accent: #2f5f8f;--accent-soft: #e1ebf4;--good: #3d8a5f;--good-soft: #e2f2e9;--bad: #c0392b;--bad-soft: #fbe4e0;--line: #dde4ea;--sign-bg: #14452f;--sign-ink: #ffffff}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif}.jp{font-family:Hiragino Sans,Hiragino Kaku Gothic ProN,Yu Gothic,Noto Sans JP,Meiryo,sans-serif}.accent{color:var(--accent)}header{display:flex;align-items:center;justify-content:space-between;padding:14px 18px 6px;max-width:640px;margin:0 auto}header h1{font-size:18px;margin:0;letter-spacing:.3px}.streak{font-size:13px;color:var(--muted);font-weight:600}nav{display:flex;gap:6px;padding:8px 14px 10px;max-width:640px;margin:0 auto;flex-wrap:wrap}nav button{flex:1;min-width:68px;padding:9px 0;border:1px solid var(--line);background:var(--card);border-radius:10px;font-size:13px;font-weight:600;color:var(--muted);cursor:pointer}nav button.on{background:var(--accent);border-color:var(--accent);color:#fff}main{max-width:640px;margin:0 auto;padding:4px 14px 60px}.panel{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;margin-bottom:12px}.panel h2{margin:0 0 6px;font-size:18px}.panel h3{margin:0 0 6px;font-size:15px}.hint{color:var(--muted);font-size:13px;line-height:1.5}.hint.center{text-align:center}.meta-row{display:flex;justify-content:space-between;align-items:center;font-size:12.5px;color:var(--muted);margin-bottom:6px}.drill-note{color:var(--good);font-weight:600}.btn{padding:10px 18px;border:none;border-radius:10px;background:var(--accent);color:#fff;font-size:15px;font-weight:700;cursor:pointer}.btn.ghost{background:transparent;color:var(--accent);border:1.5px solid var(--accent)}.btn.small{padding:6px 12px;font-size:13px}.btn.grow{flex:1}.btn.danger{background:var(--bad)}.btn:disabled{opacity:.45;cursor:default}.row-gap{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px;align-items:center}.trial-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;margin-bottom:12px}.trial-stimulus{font-size:96px;text-align:center;line-height:1.15;margin:8px 0 10px;-webkit-user-select:none;user-select:none}.trial-stimulus.en{font-family:inherit;font-size:24px;font-weight:700;line-height:1.4}.trial-stimulus.hear,.trial-stimulus.sign{font-size:16px}.trial-tag{display:block;font-size:12px;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:var(--muted);margin-bottom:10px}.sign-frame{display:inline-block;background:var(--sign-bg);color:var(--sign-ink);border-radius:10px;padding:18px 30px;font-size:52px;line-height:1.2;letter-spacing:2px}.hear-play{border:none;background:var(--accent-soft);color:var(--accent);border-radius:50%;width:96px;height:96px;font-size:42px;cursor:pointer}.hear-play:active{background:var(--accent);color:#fff}.hear-caption{font-size:12.5px;color:var(--muted);margin-top:8px}.trial-instruction{text-align:center;color:var(--muted);font-size:13px;margin:-4px 0 10px}.trial-hint{background:#fdf3d7;border-radius:10px;padding:10px 14px;font-size:13.5px;line-height:1.5;margin-bottom:10px}.trial-timer{height:3px;background:var(--line);border-radius:2px;margin-top:12px;overflow:hidden}.trial-timer-fill{height:100%;width:100%;background:var(--accent-soft);transition-property:width;transition-timing-function:linear}.trial-timer-fill.running{width:0;background:var(--accent);opacity:.5}.trial-actions{display:flex;justify-content:flex-end;align-items:center;gap:8px;margin-top:12px;flex-wrap:wrap}.trial-actions .trial-know{flex:1;min-width:150px;padding:12px 18px}.reveal{margin-top:4px;padding:14px 16px;border-radius:12px;font-size:16px;line-height:1.5}.reveal.good{background:var(--good-soft);color:var(--good)}.reveal.bad{background:var(--bad-soft);color:var(--bad)}.reveal-heading{font-weight:700;font-size:28px}.reveal-kana{font-size:17px;margin-top:2px}.reveal-romaji{color:var(--muted);font-size:14px;margin-top:2px}.reveal-en{color:var(--ink);font-size:15px;font-weight:600;margin-top:6px}.reveal-detail{color:var(--ink);font-size:14px;margin-top:4px}.reveal-note{display:block;margin-top:8px;color:var(--ink);font-size:13.5px;background:var(--bg);border-radius:8px;padding:8px 10px}.reveal-actions{display:flex;gap:8px;align-items:center;margin-top:12px;flex-wrap:wrap}.reveal-actions .btn:last-child{margin-left:auto}.rec-row{display:flex;gap:8px;align-items:center;margin-top:10px;flex-wrap:wrap}.rec-chip{padding:4px 12px;border-radius:20px;font-size:12.5px;font-weight:700;background:var(--bg);color:var(--ink)}.rec-chip.good{background:var(--good-soft);color:var(--good)}.rec-chip.bad{background:var(--bad-soft);color:var(--bad)}.intro-jp{font-size:44px;text-align:center;line-height:1.3;margin:8px 0 2px;-webkit-user-select:none;user-select:none}.intro-jp.sign-intro{margin-bottom:10px}.intro-kana{text-align:center;font-size:18px;color:var(--ink)}.intro-romaji{text-align:center;font-size:14px;color:var(--muted)}.intro-en{text-align:center;font-size:16px;font-weight:600;margin-top:8px}.intro-tag{display:inline-block;background:var(--accent-soft);color:var(--accent);padding:2px 10px;border-radius:20px;font-size:12px;font-weight:700}.mnemonic-box{background:var(--bg);border-radius:10px;padding:12px 14px;margin-top:12px;font-size:14.5px;line-height:1.5}.chips{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}.chip{padding:7px 12px;border-radius:20px;border:1px solid var(--line);background:var(--card);font-size:13px;font-weight:600;color:var(--muted);cursor:pointer}.chip.on{background:var(--accent);border-color:var(--accent);color:#fff}.cs-block{margin-bottom:14px}.cs-block.panic{border:2px solid var(--bad)}.cs-block.panic h3{color:var(--bad)}.cs-line{display:flex;align-items:center;gap:10px;padding:9px 0;border-bottom:1px solid var(--bg)}.cs-line:last-child{border-bottom:none}.cs-text{flex:1;min-width:0}.cs-en{font-size:13px;color:var(--muted)}.cs-jp{font-size:18px;line-height:1.4}.cs-romaji{font-size:12.5px;color:var(--muted)}.cs-play{border:1px solid var(--line);background:var(--card);border-radius:50%;width:38px;height:38px;font-size:16px;cursor:pointer;flex-shrink:0}.sc-turn{margin-bottom:10px}.sc-role{display:inline-block;font-size:11.5px;font-weight:700;letter-spacing:1px;text-transform:uppercase;padding:2px 10px;border-radius:20px;margin-bottom:6px}.sc-role.you{background:var(--accent-soft);color:var(--accent)}.sc-role.them{background:var(--good-soft);color:var(--good)}.sc-progress{font-size:12.5px;color:var(--muted)}.sc-done-list{font-size:14.5px;line-height:1.8}.statgrid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:12px}.statbox{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px;text-align:center}.statbox-n{font-size:26px;font-weight:800;color:var(--accent)}.statbox-l{font-size:12px;color:var(--muted);margin-top:2px}.mode-row{display:flex;gap:10px;margin-bottom:12px}.mode-box{flex:1;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px;text-align:center}.mode-box-h{font-size:13px;font-weight:700;color:var(--accent)}.mode-box-n{font-size:22px;font-weight:800;margin-top:2px}.mode-box-l{font-size:11.5px;color:var(--muted)}.done-banner{text-align:center;padding:30px 10px}.done-big{font-size:44px}.start-panel{text-align:center;padding:30px 16px}.start-big{font-size:44px}.start-stats{font-size:15px;font-weight:600;margin:6px 0}.start-btn{min-width:200px;padding:13px 24px;font-size:16px;margin-top:10px}.start-alt{margin-top:14px}.jy-hero{text-align:center;padding:22px 16px}.jy-hero-n{font-size:48px;font-weight:800;line-height:1.1;font-variant-numeric:tabular-nums}.jy-hero-total{color:var(--muted);font-size:26px;font-weight:700}.jy-hero-sub{font-size:13.5px;color:var(--muted);margin:2px 0 10px}.jy-h{margin:0 0 8px;font-size:13px;color:var(--muted);font-weight:600;letter-spacing:.2px}.jy-legend{display:flex;gap:14px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin-bottom:6px}.jy-legend-item{display:inline-flex;align-items:center;gap:5px}.jy-chip{width:10px;height:10px;border-radius:3px;display:inline-block}.jy-chart{width:100%;height:auto;display:block}.cal-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:5px;max-width:340px}.cal-cell{height:20px;border-radius:4px}.cal-cell.zero{background:var(--bg);border:1px solid var(--line)}.cal-cell.pre{border:1px dashed var(--line)}.cal-cell.today{outline:2px solid var(--accent);outline-offset:1px}.fc-row{display:flex;gap:8px;align-items:flex-end;max-width:420px}.fc-col{flex:1;text-align:center}.fc-bar{border-radius:4px 4px 0 0;background:var(--line)}.fc-v{font-size:11px;color:var(--muted);min-height:15px}.fc-l{font-size:11px;color:var(--muted);margin-top:3px}.ms-list{font-size:13.5px;line-height:1.6}.ms-row{display:flex;align-items:baseline;gap:6px;padding:5px 0;border-bottom:1px solid var(--bg)}.ms-row:last-child{border-bottom:none}.ms-label{flex:1}.ms-date{color:var(--muted);font-size:12px;white-space:nowrap}label.opt{display:flex;align-items:center;gap:10px;padding:9px 0;font-size:14.5px;border-bottom:1px solid var(--line);cursor:pointer;justify-content:flex-start}label.opt:last-child{border-bottom:none}@media(max-width:420px){.sign-frame{font-size:38px;padding:14px 20px}.trial-stimulus.en{font-size:20px}.intro-jp{font-size:34px}}.sync input.key{flex:1;min-width:160px;padding:6px 10px;font:inherit;font-size:13px;color:inherit;background:transparent;border:1.5px solid var(--line);border-radius:8px}.sync input.key:focus{outline:none;border-color:var(--accent)}.sync .sync-error{color:var(--bad)}.sync .sync-error:empty,.sync .sync-status:empty{display:none}