:root{--bg: #fff;--ink: #111;--mute: #6f6f6f;--line: #e8e8e8;--fill: #f7f7f7;--focus: #111;--max: 920px;--font: "Helvetica Neue", Helvetica, "PingFang SC", "Noto Sans SC", Arial, sans-serif}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100%;background:var(--bg);color:var(--ink);font-family:var(--font)}body{font-size:15px;line-height:1.45}button,textarea,input{font:inherit;color:inherit}a{color:inherit;text-decoration:none}.shell{max-width:var(--max);margin:0 auto;padding:20px 18px 64px}.topbar{display:flex;align-items:baseline;justify-content:space-between;border-bottom:1px solid var(--ink);padding-bottom:10px;margin-bottom:18px}.topbar h1{margin:0;font-size:20px;font-weight:560;letter-spacing:.04em}.ghost{border:0;background:none;padding:0;color:var(--mute);cursor:pointer}.ghost:hover,.topbar a:hover{color:var(--ink)}.board{display:flex;flex-direction:column;gap:1px;background:var(--line);border:1px solid var(--ink)}.row{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line)}.pane{background:var(--bg);display:flex;flex-direction:column;min-height:148px;padding:10px 12px 12px;position:relative}.pane-label{display:flex;align-items:baseline;gap:6px;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--mute)}.pane-hint{font-style:normal;font-size:11px;letter-spacing:0;text-transform:none;color:#aaa}textarea{border:0;resize:vertical;min-height:108px;outline:none;background:transparent;padding:8px 0 0}textarea::placeholder{color:#bbb}.pane-out textarea{color:var(--ink)}.pane-tools{display:flex;align-items:center;justify-content:flex-end;gap:12px;margin-top:auto;padding-top:6px;min-height:20px}.pane-tools .counter{margin-right:auto;font-size:11px;color:#bbb;letter-spacing:0}.link{border:0;background:none;padding:0;color:var(--mute);font-size:12px;cursor:pointer}.link:disabled{opacity:.35;cursor:default}.link:not(:disabled):hover{color:var(--ink);text-decoration:underline}.star{border:0;background:none;color:var(--mute);font-size:12px;cursor:pointer;padding:0}.star:disabled{opacity:.35;cursor:default}.star:not(:disabled):hover{color:var(--ink);text-decoration:underline}.bar{display:flex;align-items:center;justify-content:space-between;gap:12px;background:var(--bg);padding:10px 12px}.lang-radio{display:flex;gap:14px}.lang-radio label{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--mute);cursor:pointer}.lang-radio label.is-on{color:var(--ink)}.lang-radio input{accent-color:var(--ink);width:13px;height:13px;margin:0}.submit{border:1px solid var(--ink);background:var(--ink);color:#fff;padding:7px 16px;cursor:pointer;letter-spacing:.08em}.submit:disabled{opacity:.45;cursor:default}.note,.empty,.dict-empty{color:var(--mute);font-size:13px}.note{margin:12px 0 0}.dict{margin-top:22px;border-top:1px solid var(--line);padding-top:16px}.dict-entry+.dict-entry{margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}.dict-entry header{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px 10px;margin-bottom:8px}.dict-entry strong{font-size:22px;font-weight:560}.ipa,.kana{color:var(--mute)}.tag,.audio,.chip{border:1px solid var(--line);background:var(--bg);font-size:11px;padding:1px 6px;color:var(--mute)}.audio,.chip{cursor:pointer}.dict h4{margin:10px 0 4px;font-size:12px;font-weight:500;color:var(--mute);letter-spacing:.08em}.dict ol{margin:0;padding-left:18px}.dict li p{margin:0 0 4px}.ex{color:var(--mute);font-size:13px}.dict .src{margin:14px 0 0;font-size:11px;color:#aaa}.bar-vocab{border:1px solid var(--line);margin-bottom:18px;flex-wrap:wrap}.filters{display:flex;flex-wrap:wrap;gap:6px}.chip.is-on{border-color:var(--ink);color:var(--ink)}.review{display:flex;flex-direction:column;gap:12px}.meta{margin:0;color:var(--mute);font-size:12px;letter-spacing:.06em}.flash{text-align:left;border:1px solid var(--ink);background:var(--bg);padding:28px 18px;cursor:pointer;min-height:140px;display:flex;flex-direction:column;gap:12px}.flash b{font-size:26px;font-weight:560}.flash .hint{color:#bbb}.grades{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.grades button{border:1px solid var(--line);background:var(--bg);padding:10px 0;cursor:pointer}.grades button.is-on,.grades button:hover{border-color:var(--ink)}.review-nav{display:flex;justify-content:space-between}.danger:hover{color:#111;text-decoration:underline}.empty{margin-top:40px}.topnav{display:flex;align-items:center;gap:16px;font-size:13px}.topnav .ghost{display:inline-flex;align-items:center;gap:6px}.kbd{display:inline-block;min-width:16px;text-align:center;border:1px solid var(--line);border-bottom-width:2px;border-radius:3px;padding:0 5px;font-size:11px;line-height:16px;color:var(--mute);background:var(--fill);font-family:var(--font)}.row[data-active] .pane{background:#fcfcfc}.row[data-active] .pane textarea{color:var(--ink)}.row-dict{border-top:1px solid var(--line);background:var(--bg);padding:0 12px 10px}.row-dict .dict{margin-top:0;border-top:0;padding-top:6px}.dict-muted{color:#bbb;font-size:13px}.dict-compact .dict-entry strong{font-size:18px}.vocab-head{display:flex;flex-direction:column;gap:10px;margin-bottom:16px}.search{border:1px solid var(--line);background:var(--bg);padding:8px 10px;outline:none;width:100%}.search:focus{border-color:var(--ink)}.chip-n{margin-left:6px;color:#bbb;font-size:10px}.chip.is-on .chip-n{color:var(--ink)}.flash .dst{font-size:18px;line-height:1.5;color:var(--ink)}.flash .hint{font-size:12px;letter-spacing:.08em;text-transform:uppercase}.meta .tag{margin-left:8px}.empty-state{display:flex;flex-direction:column;align-items:flex-start;gap:12px}.note .link{margin-left:6px;text-decoration:underline}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:20;display:flex;align-items:center;justify-content:center;padding:20px;background:#11111161}.shortcuts{width:min(560px,100%);max-height:min(82vh,760px);overflow:auto;background:var(--bg);border:1px solid var(--ink);padding:18px 20px 22px}.shortcuts header{display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line);padding-bottom:10px;margin-bottom:12px}.shortcuts h2{margin:0;font-size:15px;font-weight:560;letter-spacing:.06em}.shortcuts h3{margin:16px 0 8px;font-size:11px;font-weight:500;text-transform:uppercase;letter-spacing:.14em;color:var(--mute)}.shortcut-row{display:flex;align-items:center;gap:12px;padding:3px 0;font-size:13px}.shortcut-row .kbd{flex:0 0 auto;min-width:92px}.shortcuts .hint{margin:16px 0 0;font-size:12px;color:#aaa}:focus-visible{outline:2px solid var(--ink);outline-offset:2px}textarea:focus-visible{outline-offset:-2px}.search input:focus-visible,input:focus-visible{outline-offset:0}@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}@media(max-width:720px){.row{grid-template-columns:1fr}.grades{grid-template-columns:1fr 1fr}.shell{padding:14px 12px 48px}.topnav{gap:10px}.shortcut-row .kbd{min-width:72px}.row-dict{padding:0 10px 8px}.review-nav{flex-wrap:wrap;gap:10px}textarea{resize:none;min-height:88px}}