:root{--bg: #faf8f3;--ink: #1a1a1a;--muted: #6b6357;--line: #e7e2d6;--paper: #fffdf8;--accent: #c0392b;--good: #1e7d3a;--hard: #b8860b;--again: #d35400;--bad: #c0392b}*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body,#root{height:100%}body{background:var(--bg);color:var(--ink);font-family:-apple-system,system-ui,Hiragino Sans,Noto Sans JP,sans-serif;-webkit-user-select:none;user-select:none;overflow:hidden}.app{height:100%;display:flex;flex-direction:column}.app.center{align-items:center;justify-content:center;color:var(--muted);padding:24px;text-align:center}.appbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:8px 14px;border-bottom:1px solid var(--line);flex-wrap:wrap}.appbar .stats{display:flex;gap:8px}.pill{font:600 13px ui-monospace,monospace;padding:4px 10px;border-radius:999px;border:1px solid var(--line)}.pill.due{color:var(--good)}.pill.new{color:#2471a3}.appbar .controls{display:flex;align-items:center;gap:14px;font:13px system-ui;color:var(--muted)}.toggle,.numset{display:flex;align-items:center;gap:6px}.numset input{width:52px;font:14px system-ui;padding:4px 6px;border:1px solid var(--line);border-radius:6px}.ghost{font:600 13px system-ui;background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:6px 12px}.diagrams{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}.diagram{width:96px;height:96px;background:#fff;border:1px solid var(--line);border-radius:8px}.lvl{margin-left:auto;font:600 12px ui-monospace,monospace;color:var(--muted);border:1px solid var(--line);border-radius:6px;padding:2px 8px}.study{flex:1;min-height:0;display:flex;flex-direction:column;padding:4px 8px calc(12px + env(safe-area-inset-bottom));gap:10px;width:100%;overflow:hidden}.fab{width:44px;height:44px;border-radius:12px;font-size:20px;line-height:1;background:var(--paper);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;z-index:30}.fab:active{transform:scale(.95)}.fab:disabled{opacity:.3}.session{height:100%;display:flex;flex-direction:column}.session-bar{display:flex;align-items:center;gap:8px;padding:calc(8px + env(safe-area-inset-top)) 8px 4px}.icon-btn{width:34px;height:34px;border-radius:10px;font-size:17px;line-height:1;background:var(--paper);border:1px solid var(--line);color:var(--ink);display:flex;align-items:center;justify-content:center}.icon-btn:active{transform:scale(.95)}.icon-btn:disabled{opacity:.3}.counts{margin-left:auto;display:flex;gap:6px}.cnt{font:700 15px ui-monospace,monospace;min-width:34px;text-align:center;padding:4px 11px;border-radius:999px;color:#fff}.cnt.new{background:#2471a3}.cnt.learn{background:var(--again)}.cnt.review{background:var(--good)}.home{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:28px;position:relative;padding:24px}.home-title{font-size:clamp(28px,5vw,44px);font-weight:700;letter-spacing:.04em}.overview{display:flex;gap:48px}.ov-stat{display:flex;flex-direction:column;align-items:center;gap:4px}.ov-num{font-size:clamp(44px,9vw,72px);font-weight:800;line-height:1}.ov-num.newc{color:#2471a3}.ov-num.duec{color:var(--good)}.ov-label{font-size:14px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}.home-actions{display:flex;gap:14px;flex-wrap:wrap;justify-content:center}.home-actions button{font:700 17px system-ui;border:none;border-radius:14px;padding:16px 32px;min-width:180px}.home-actions button:active{transform:scale(.98)}.home-actions .primary{background:var(--ink);color:#fff}.home-actions .secondary{background:var(--paper);color:var(--ink);border:1px solid var(--line)}.home-actions button:disabled{opacity:.4}.home-foot{font-size:13px;color:var(--muted)}.gear{position:absolute;top:14px;right:16px;font-size:22px;background:none;border:none;color:var(--muted)}.sync-fab{position:absolute;top:10px;left:10px}.home-level{font-size:15px;color:var(--accent);font-weight:600}.settings{max-width:480px;margin:0 auto;padding:24px;display:flex;flex-direction:column;gap:18px;align-items:flex-start}.settings .back{background:none;border:none;color:var(--muted);font:600 14px system-ui}.settings h2{font-size:22px}.settings .ghost{width:100%;text-align:left;padding:12px 14px}.set-section{width:100%;border-top:1px solid var(--line);padding-top:14px;display:flex;flex-direction:column;gap:10px}.set-section h3{font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}.dl-bar{width:100%;height:8px;background:var(--line);border-radius:4px;overflow:hidden}.dl-fill{height:100%;background:var(--good);transition:width .2s}.dl-note{font-size:12px;color:var(--muted)}.menu{position:fixed;top:10px;right:10px;z-index:30}.menu-scrim{position:fixed;top:0;right:0;bottom:0;left:0;z-index:25}.menu-panel{position:absolute;top:52px;right:0;width:250px;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:14px;display:flex;flex-direction:column;gap:14px;box-shadow:0 10px 34px #00000029}.menu-stats{display:flex;gap:8px}.menu-panel .ghost{width:100%}.menu-panel .numset input{width:60px}.col-left{flex:1;min-height:0;display:flex;flex-direction:column;gap:12px}.col-right,.answer-area{flex:1;min-height:0;display:flex;flex-direction:column}@media (orientation: landscape) and (min-width: 760px){.study{flex-direction:row;align-items:stretch;gap:20px}.col-left{flex:1}.col-right{flex:1.15}}.topbar{display:flex;justify-content:flex-end}.count{font:600 13px ui-monospace,monospace;color:var(--muted);background:var(--paper);border:1px solid var(--line);padding:4px 10px;border-radius:999px}.prompt{text-align:center}.sentence{font-size:clamp(20px,3.4vw,30px);line-height:1.7}.cloze{color:var(--accent);border-bottom:2px dashed var(--accent);padding:0 4px;font-weight:700}.instruction{margin-top:6px;font-size:13px;color:var(--muted)}.canvas-wrap{flex:1;position:relative;min-height:220px}.pad{width:100%;height:100%;display:block;touch-action:none;border-radius:14px;background:linear-gradient(var(--paper),var(--paper)) padding-box,repeating-linear-gradient(0deg,var(--line) 0 1px,transparent 1px 25%),repeating-linear-gradient(90deg,var(--line) 0 1px,transparent 1px 25%);border:1px solid var(--line)}.canvas-tools{position:absolute;top:10px;right:10px;display:flex;gap:8px}.canvas-tools button{font:600 13px system-ui;color:var(--ink);background:#fffdf8eb;border:1px solid var(--line);border-radius:8px;padding:9px 14px}.canvas-tools button:active{transform:scale(.96)}.canvas-tools .tool-erase.on{background:var(--accent);color:#fff;border-color:var(--accent)}.write-controls{height:62px;margin-bottom:10px}.write-controls .reveal-btn{margin:0;height:100%}.write-controls .grades{margin-top:0;height:100%;grid-template-columns:repeat(auto-fit,minmax(108px,1fr));grid-auto-rows:1fr}.write-controls .grade{height:100%;justify-content:center}.reveal-btn{font:600 16px system-ui;color:#fff;background:var(--ink);border:none;border-radius:12px;padding:16px;width:100%}.reveal-btn:active{transform:scale(.99)}.answer{flex:1;min-height:0;overflow-y:auto;background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:14px 16px}.answer-head{display:flex;align-items:center;gap:14px;justify-content:space-between}.kanji-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.kdiagram{width:clamp(76px,11vw,110px);height:clamp(76px,11vw,110px);padding:4px;border:3px solid var(--line);border-radius:12px;background:#fff;position:relative}.kdiagram img{width:100%;height:100%;display:block}.kdiagram:active{transform:scale(.97)}.kdiagram.open{outline:3px solid var(--ink);outline-offset:2px}.kdiagram.stroke{border-color:var(--hard)}.kdiagram.lookalike{border-color:#2471a3}.kdiagram.homophone{border-color:#6c3483}.kdiagram.blank{border-color:var(--bad)}.kdiagram.stroke:after,.kdiagram.lookalike:after,.kdiagram.homophone:after,.kdiagram.blank:after{position:absolute;top:-9px;right:-9px;min-width:20px;height:20px;padding:0 4px;border-radius:10px;color:#fff;font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center}.kdiagram.stroke:after{content:"✎";background:var(--hard)}.kdiagram.lookalike:after{content:"形";background:#2471a3}.kdiagram.homophone:after{content:"音";background:#6c3483}.kdiagram.blank:after{content:"✗";background:var(--bad)}.kfallback{font-size:40px;font-weight:700}.picker{margin-top:10px;border:1px solid var(--line);border-radius:12px;padding:10px;background:#fbf7ee}.picker-head{display:flex;align-items:center;gap:10px;margin-bottom:8px}.picker-kanji{font-size:28px;font-weight:700}.opts{display:grid;grid-template-columns:repeat(2,1fr);gap:6px}.opt{font:600 13px system-ui;border:1px solid var(--line);border-radius:8px;padding:9px 10px;background:#fff;color:var(--ink);text-align:left}.opt .opt-jp{color:var(--muted);font-size:11px}.opt.sel{outline:2px solid var(--ink)}.opt.ok{margin-left:auto;background:#e6f1e8}.opt.stroke.sel{background:#fdf2d8}.opt.lookalike.sel{background:#d6e6f2}.opt.homophone.sel{background:#e8dcf0}.opt.blank.sel{background:#f6dcd8}.cand-label{margin-top:8px;font-size:12px;color:var(--muted)}.cand{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}.candchip{font-size:22px;font-weight:700;background:#fff;border:1px solid var(--line);border-radius:8px;padding:4px 12px;min-width:44px}.candchip.sel{background:var(--ink);color:#fff}.wrote{margin-top:8px;width:100%;font:16px system-ui;padding:8px 10px;border:1px solid var(--line);border-radius:8px}.okuri{margin-top:10px;font:600 13px system-ui;border:1px dashed var(--muted);border-radius:8px;padding:8px 12px;background:transparent;color:var(--muted)}.okuri.on{background:var(--hard);border-style:solid;border-color:var(--hard);color:#fff}.kana{font-size:clamp(30px,6vw,44px);color:var(--muted)}.meta-row{display:flex;align-items:baseline;gap:12px;margin-top:8px}.reading{font-size:18px;color:var(--accent);font-weight:600}.meaning{font-size:15px;color:var(--muted)}.legend{margin-top:8px;font-size:12px;color:var(--muted)}.kanji-info{margin-top:10px;display:flex;flex-direction:column;gap:6px}.ki{display:flex;align-items:center;gap:10px;width:100%;text-align:left;background:#fff;border:1px solid var(--line);border-radius:10px;padding:7px 11px;font-size:14px}.ki:active{background:#f4efe4}.ki-rad{display:inline-flex;align-items:center;gap:4px;background:#faf6ee;border:1px solid var(--line);border-radius:6px;padding:2px 6px;font-weight:600}.ki-rad img{width:18px;height:18px}.ki-ch{font-size:20px;font-weight:700}.ki-yomi b{color:var(--accent);font-weight:700;margin-right:2px}.ki-more{margin-left:auto;color:var(--muted);font-size:12px;white-space:nowrap}.dialog-scrim{position:fixed;top:0;right:0;bottom:0;left:0;z-index:50;background:#14120e73;display:flex;align-items:center;justify-content:center;padding:20px;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.dialog{position:relative;width:100%;max-width:820px;max-height:88vh;overflow-y:auto;background:var(--paper);border-radius:16px;padding:20px 24px;box-shadow:0 16px 50px #0000004d}.dlg-cols{margin-top:14px;columns:2;column-gap:28px}.dlg-cols>*{break-inside:avoid;margin:0 0 18px}@media (max-width: 620px){.dlg-cols{columns:1}}.dialog-close{position:absolute;top:12px;right:12px;width:34px;height:34px;border-radius:9px;border:1px solid var(--line);background:#fff;font-size:16px}.dlg-head{display:flex;gap:16px;align-items:center}.dlg-diagram{width:104px;height:104px;border:1px solid var(--line);border-radius:10px;background:#fff;flex-shrink:0}.dlg-char-big{font-size:72px;font-weight:700;line-height:1}.dlg-char{font-size:30px;font-weight:700}.dlg-sub{color:var(--muted);font:600 13px ui-monospace,monospace;margin:2px 0 8px}.dlg-rad{display:flex;align-items:center;gap:6px;font-size:15px}.dlg-rad img{width:22px;height:22px}.dlg-rad-label{font-size:11px;color:var(--muted);background:#f0ebe0;border-radius:5px;padding:2px 6px}.dlg-rad-char{color:var(--muted)}.dlg-readings{margin-top:14px;display:flex;flex-direction:column;gap:6px}.dlg-row{display:flex;align-items:baseline;gap:10px;font-size:17px}.dlg-label{flex-shrink:0;width:26px;height:26px;display:inline-flex;align-items:center;justify-content:center;border-radius:7px;font-size:13px;font-weight:700;color:#fff}.dlg-label.on{background:var(--accent)}.dlg-label.kun{background:var(--good)}.dlg-mean{margin-top:14px;font-size:15px;line-height:1.7;color:#2e2a22}.dlg-section{margin-top:16px}.dlg-section-title{font-size:12px;font-weight:700;color:var(--muted);letter-spacing:.06em;border-bottom:1px solid var(--line);padding-bottom:5px;margin-bottom:8px}.dlg-words{list-style:none;display:flex;flex-direction:column;gap:7px}.dlg-word{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}.dw-word{font-size:17px;font-weight:600}.dw-reading{font-size:13px;color:var(--accent)}.dw-gloss{font-size:13px;color:var(--muted)}.dlg-kchips{display:flex;flex-wrap:wrap;gap:8px}.dlg-kchip{display:flex;flex-direction:column;align-items:center;gap:1px;background:#fff;border:1px solid var(--line);border-radius:8px;padding:5px 9px;min-width:46px}.dlg-kchip.nav{border-color:#b9cfe0;background:#f4f9fd}.dlg-kchip:disabled{opacity:.85}.dk-char{font-size:20px;font-weight:700}.dk-gloss{font-size:9px;color:var(--muted);max-width:64px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.legend .forgot{color:var(--again)}.legend .confused{color:#6c3483}.audio{font-size:22px;background:none;border:1px solid var(--line);border-radius:10px;padding:8px 12px}.full-sentence{margin-top:10px;font-size:20px}.spk{font-size:15px;opacity:.6}.en{font-size:14px;color:var(--muted);margin-top:2px}.grades{margin-top:14px;display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:8px}.grade{display:flex;flex-direction:column;align-items:center;gap:2px;border:none;border-radius:12px;padding:12px 8px;color:#fff}.grade:active{transform:scale(.97)}.g-label{font:700 14px system-ui}.g-sub{font-size:11px;opacity:.85}.g-due{font:600 12px ui-monospace,monospace;margin-top:2px;opacity:.9}.grade.easy{background:#2471a3}.grade.good{background:var(--good)}.grade.hard{background:var(--hard)}.grade.again{background:var(--again)}.grade.bad{background:var(--bad)}.done{margin:auto;text-align:center;display:flex;flex-direction:column;gap:10px;align-items:center}.done h1{font-size:40px;color:var(--good)}.done .reviews{color:var(--muted);font-size:14px}.done button{margin-top:8px;font:600 14px system-ui;background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:10px 18px}.game-link{margin:14px auto 0;display:flex;align-items:baseline;gap:8px;font:700 17px system-ui;color:var(--ink);background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:12px 20px}.game-link .gl-sub{font:500 12px system-ui;color:var(--muted)}.game-link:active{transform:scale(.99)}.game{flex:1;min-height:0;display:flex;flex-direction:column;align-items:center;gap:12px;padding:12px 14px calc(16px + env(safe-area-inset-bottom));max-width:560px;margin:0 auto;width:100%;overflow-y:auto}.game .back{align-self:flex-start;background:none;border:none;color:var(--muted);font:600 14px system-ui}.game-head{width:100%;display:flex;align-items:center;justify-content:space-between}.game-head h2{margin:0}.conn-mistakes{display:flex;gap:6px}.conn-mistakes .dot{width:11px;height:11px;border-radius:50%;background:var(--line);transition:background .2s,transform .2s}.conn-mistakes .dot.used{background:var(--bad);animation:dot-pop .3s ease}@keyframes dot-pop{0%{transform:scale(1)}50%{transform:scale(1.5)}to{transform:scale(1)}}.conn-solved{width:100%;display:flex;flex-direction:column;gap:8px}.conn-group{border-radius:12px;padding:10px 14px;text-align:center;color:#2a2410}.conn-group .cg-label{display:block;font:700 14px system-ui}.conn-group .cg-members{display:block;font-size:24px;letter-spacing:6px;margin-top:2px}.conn-group.miss{opacity:.72}.conn-group.pop-in{animation:group-in .42s cubic-bezier(.2,.8,.25,1.25) backwards}@keyframes group-in{0%{opacity:0;transform:scale(.8) translateY(-8px)}to{opacity:1;transform:none}}.conn-group.c0{background:#f2d65e}.conn-group.c1{background:#9ec96f}.conn-group.c2{background:#7fb4e6}.conn-group.c3{background:#c39bd8}.conn-grid{width:100%;display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.conn-tile{aspect-ratio:1 / 1;display:flex;align-items:center;justify-content:center;font-size:clamp(28px,9vw,40px);color:var(--ink);background:var(--paper);border:1px solid var(--line);border-radius:12px;transition:transform .1s ease,background .12s,color .12s,box-shadow .12s;animation:tile-in .34s cubic-bezier(.2,.7,.3,1) backwards}.conn-tile:active{transform:scale(.92)}.conn-tile.on{background:var(--ink);color:#fff;border-color:var(--ink);transform:scale(.95);box-shadow:0 6px 16px #0000002e}.conn-tile.wrong{animation:conn-shake .4s both}.conn-tile.pop{animation:tile-pop .45s ease both}@keyframes tile-in{0%{opacity:0;transform:translateY(12px) scale(.85)}to{opacity:1;transform:none}}@keyframes tile-pop{0%{transform:scale(.95)}35%{transform:translateY(-16px) scale(1.08)}70%{transform:translateY(0) scale(1)}to{transform:scale(.95)}}@keyframes conn-shake{0%,to{transform:translate(0)}20%,60%{transform:translate(-5px)}40%,80%{transform:translate(5px)}}.conn-flash{min-height:22px;margin:2px 0;font:600 15px system-ui;color:var(--accent);animation:flash-in .25s ease}@keyframes flash-in{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}.conn-actions{width:100%;display:flex;align-items:center;gap:10px;margin-top:auto}.conn-actions .ghost{flex:0 0 auto;border-radius:999px;padding:13px 18px;font:600 14px system-ui}.conn-actions .ghost:disabled{opacity:.4}.conn-actions .primary{flex:1;min-height:54px;border:none;border-radius:999px;background:var(--ink);color:#fff;font:700 18px system-ui;letter-spacing:.06em;transition:transform .08s,opacity .2s}.conn-actions .primary:disabled{opacity:.32}.conn-actions .primary:not(:disabled){animation:cta-ready 1.9s ease-out infinite}.conn-actions .primary:not(:disabled):active{transform:scale(.97)}@keyframes cta-ready{0%{box-shadow:0 0 #1a1a1a47}70%,to{box-shadow:0 0 0 10px #1a1a1a00}}.conn-result{display:flex;flex-direction:column;align-items:center;gap:14px;margin:auto 0}.conn-result.pop-in{animation:group-in .4s cubic-bezier(.2,.8,.25,1.25) backwards}.conn-result .cr-msg{font:700 24px system-ui;animation:cr-bounce .6s cubic-bezier(.2,.8,.25,1.3) both}@keyframes cr-bounce{0%{transform:scale(.6);opacity:0}60%{transform:scale(1.12);opacity:1}to{transform:scale(1)}}.conn-result .secondary{border:1px solid var(--line);background:var(--paper);color:var(--ink);border-radius:999px;padding:13px 30px;font:700 16px system-ui}.game-empty .primary{align-self:center;border:none;border-radius:14px;background:var(--ink);color:#fff;padding:14px 30px;font:700 16px system-ui}@media (prefers-reduced-motion: reduce){.conn-tile,.conn-tile.pop,.conn-group.pop-in,.conn-result.pop-in,.conn-result .cr-msg,.conn-actions .primary:not(:disabled),.conn-flash,.conn-mistakes .dot.used{animation:none}}.game-empty{margin:auto;text-align:center;display:flex;flex-direction:column;gap:10px;max-width:360px}.game-empty .ge-jp{font:700 20px system-ui}.game-empty .ge-en{color:var(--muted);font-size:14px;line-height:1.5}