:root{color:#24201c;background:#f6f1e8;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;--paper: #fffaf1;--ink: #24201c;--muted: #766d62;--line: #ded6ca;--accent: #2f7d70;--accent-strong: #1f5f56;--warm: #c75b39;--shadow: 0 18px 42px rgba(54, 45, 35, .12)}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background:linear-gradient(#efe5d7 1px,transparent 1px),linear-gradient(90deg,#efe5d7 1px,transparent 1px),#f6f1e8;background-size:28px 28px}button,input{font:inherit}button{color:inherit}.app-shell{width:min(100%,980px);min-height:100vh;margin:0 auto;padding:22px 16px 28px}.app-header{display:grid;gap:10px;margin-bottom:18px}.practice-layout{display:grid;gap:18px}.lookup-panel,.practice-panel{min-width:0}.eyebrow{margin:0 0 4px;color:var(--accent-strong);font-size:.74rem;font-weight:800;letter-spacing:0;text-transform:uppercase}h1{margin:0;font-family:Songti SC,"Noto Serif CJK SC","Source Han Serif SC",ui-serif,Georgia,serif;font-size:clamp(2rem,8vw,4.4rem);font-weight:800;line-height:.95;letter-spacing:0}.header-copy{max-width:30rem;margin:0;color:var(--muted);line-height:1.65}.search-section{display:grid;gap:14px}.section-label{margin:0 0 2px;color:var(--muted);font-size:.85rem;font-weight:800}.search-box{display:flex;align-items:center;gap:10px;min-height:54px;padding:0 16px;border:1px solid var(--line);border-radius:8px;background:#fffaf1eb;box-shadow:0 8px 24px #362d2314}.search-box svg{flex:0 0 auto;color:var(--accent-strong)}.search-box input{width:100%;min-width:0;border:0;outline:0;background:transparent;color:var(--ink);font-size:1rem}.search-box:focus-within{border-color:var(--accent);box-shadow:0 0 0 4px #2f7d7024}.result-strip{display:grid;gap:8px}.result-strip p{margin:0;color:var(--muted);font-size:.9rem;font-weight:700}.result-strip ul{display:flex;gap:8px;margin:0;padding:0 2px 4px;overflow-x:auto;list-style:none;scrollbar-width:thin}.char-chip{display:grid;place-items:center;gap:2px;width:70px;min-height:76px;border:1px solid var(--line);border-radius:8px;background:#fffaf1f0;cursor:pointer}.char-chip span{font-family:Kaiti SC,STKaiti,Songti SC,"Noto Serif CJK SC",ui-serif,serif;font-size:2rem;line-height:1}.char-chip small{max-width:58px;color:var(--muted);font-size:.74rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.char-chip.active{border-color:var(--accent);background:#e5f0ec;color:var(--accent-strong)}.notebook-section{display:grid;gap:12px;margin-top:18px;padding:14px;border:1px solid var(--line);border-radius:8px;background:#fffaf1c2}.notebook-header{display:flex;align-items:center;justify-content:space-between;gap:10px}.notebook-header strong{font-size:1.08rem}.icon-button,.remove-note{display:inline-grid;place-items:center;width:34px;height:34px;border:1px solid var(--line);border-radius:8px;background:var(--paper);color:var(--muted);cursor:pointer}.icon-button:disabled{cursor:not-allowed;opacity:.42}.notebook-list{display:grid;gap:8px;margin:0;padding:0;list-style:none}.notebook-list li{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px;align-items:center}.note-char{display:flex;min-height:46px;align-items:center;gap:10px;border:1px solid var(--line);border-radius:8px;background:var(--paper);cursor:pointer}.note-char span{display:inline-grid;place-items:center;width:24px;height:24px;border-radius:999px;background:#eee5d7;color:var(--muted);font-size:.78rem;font-weight:800}.note-char strong{font-family:Kaiti SC,STKaiti,Songti SC,"Noto Serif CJK SC",ui-serif,serif;font-size:1.55rem;line-height:1}.note-char.active{border-color:var(--accent);background:#e5f0ec;color:var(--accent-strong)}.notebook-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.notebook-nav button{display:inline-flex;min-height:42px;align-items:center;justify-content:center;gap:4px;border:1px solid var(--line);border-radius:8px;background:var(--ink);color:#fffaf1;font-weight:800;cursor:pointer}.empty-note{display:flex;align-items:center;gap:8px;margin:0;color:var(--muted);line-height:1.45}.writer-panel{display:grid;justify-items:center;gap:12px;margin:0 0 16px}.writer-meta{display:flex;width:min(100%,360px);align-items:center;justify-content:space-between;gap:10px}.current-character{font-family:Kaiti SC,STKaiti,Songti SC,"Noto Serif CJK SC",ui-serif,serif;font-size:2rem;font-weight:800}.mode-pill{display:inline-flex;align-items:center;min-height:30px;padding:0 10px;border:1px solid var(--line);border-radius:999px;background:var(--paper);color:var(--muted);font-size:.86rem;font-weight:700}.mode-quiz{border-color:#2f7d705c;background:#e5f0ec;color:var(--accent-strong)}.mode-animating{border-color:#c75b3961;background:#fae7df;color:#8e3f29}.writer-grid{position:relative;width:min(100%,360px);aspect-ratio:1;display:grid;place-items:center;border:1px solid #cfc3b4;border-radius:8px;background:linear-gradient(45deg,transparent 49.6%,rgba(199,91,57,.25) 50%,transparent 50.4%),linear-gradient(-45deg,transparent 49.6%,rgba(199,91,57,.25) 50%,transparent 50.4%),linear-gradient(90deg,transparent 49.6%,rgba(47,125,112,.18) 50%,transparent 50.4%),linear-gradient(transparent 49.6%,rgba(47,125,112,.18) 50%,transparent 50.4%),var(--paper);box-shadow:var(--shadow);overflow:hidden}.writer-grid svg,.writer-grid canvas{width:100%!important;height:100%!important;max-width:320px;max-height:320px}.control-bar{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.control-bar button{display:inline-flex;min-height:50px;align-items:center;justify-content:center;gap:8px;border:1px solid var(--line);border-radius:8px;background:var(--ink);color:#fffaf1;font-weight:800;cursor:pointer}.control-bar button:nth-of-type(n+4){background:var(--paper);color:var(--ink)}.control-bar button:focus-visible,.char-chip:focus-visible,.note-char:focus-visible,.notebook-nav button:focus-visible,.icon-button:focus-visible,.remove-note:focus-visible{outline:3px solid rgba(47,125,112,.32);outline-offset:2px}.control-status{display:inline-flex;min-height:50px;align-items:center;justify-content:center;border:1px solid rgba(47,125,112,.28);border-radius:8px;background:#e5f0ec;color:var(--accent-strong);font-weight:800}.error-message{margin:0 0 14px;padding:12px 14px;border:1px solid rgba(199,91,57,.35);border-radius:8px;background:#fae7df;color:#7b3523}.practice-note{display:flex;align-items:flex-start;gap:8px;margin-top:16px;color:var(--muted);line-height:1.5}.practice-note svg{flex:0 0 auto;margin-top:2px;color:var(--warm)}@media (min-width: 760px){.app-shell{width:min(100%,1120px);padding:42px 28px 40px}.app-header{grid-template-columns:minmax(0,1fr) minmax(240px,360px);align-items:end;margin-bottom:28px}h1{font-size:clamp(3.1rem,5.8vw,4.9rem)}.practice-layout{grid-template-columns:minmax(280px,340px) minmax(0,1fr);align-items:start;gap:28px}.lookup-panel{position:sticky;top:28px}.search-section{gap:16px}.notebook-section{margin-top:16px}.result-strip ul{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;overflow:visible;padding:0}.char-chip{width:100%;min-height:86px}.char-chip span{font-size:2.25rem}.char-chip small{max-width:78px}.practice-panel{display:grid;justify-items:center;min-height:620px;padding:26px;border:1px solid var(--line);border-radius:8px;background:#fffaf1b8;box-shadow:0 18px 42px #362d2317}.writer-panel{width:100%}.writer-meta,.writer-grid{width:min(100%,430px)}.writer-grid svg,.writer-grid canvas{max-width:390px;max-height:390px}.control-bar{width:min(100%,620px);grid-template-columns:repeat(3,minmax(0,1fr))}.practice-note{width:min(100%,620px)}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{scroll-behavior:auto!important}}