:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;font-synthesis:none;color:var(--text);background:var(--background);--background:#f5f6fa;--surface:#fff;--text:#202737;--muted:#566174;--line:#e5e8ef;--accent:#3863c5;--tint:#eaf0ff;--keyboard:#dfe3eb;--key:#fff;--key-shadow:#a8b0bd;--success:#17744f;--root-0:#c33f61;--root-1:#3565cf;--root-2:#19795b;--root-3:#8e4fbe;--root-4:#a16312;-webkit-text-size-adjust:100%;font-family:-apple-system,BlinkMacSystemFont,PingFang HK,Noto Sans CJK TC,sans-serif;line-height:1.5}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;--background:#14171e;--surface:#20242e;--text:#f1f3f9;--muted:#bac4d6;--line:#363c49;--accent:#9db9ff;--tint:#2c3c61;--keyboard:#232730;--key:#414855;--key-shadow:#10131a;--success:#77dab0;--root-0:#ff8ba5;--root-1:#91b3ff;--root-2:#7dd9b5;--root-3:#d4a3ff;--root-4:#f3c67b}}*{box-sizing:border-box}body{min-width:280px;margin:0}button,input{font:inherit}button{color:inherit;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent}button:disabled{cursor:default;opacity:.48}:focus-visible{outline:3px solid var(--accent);outline-offset:3px}button:not(:disabled):active{filter:brightness(.9)}h1,h2,h3,p{margin:0}.app-shell{flex-direction:column;max-width:560px;height:100dvh;margin:0 auto;display:flex}.app-header{padding:calc(16px + env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) 10px max(16px, env(safe-area-inset-left));flex:none}.page-switch{background:var(--line);border-radius:13px;grid-template-columns:1fr 1fr;padding:4px;display:grid}.page-switch button{min-height:44px;color:var(--muted);background:0 0;border:0;border-radius:9px;font-weight:600}.page-switch button[aria-current]{background:var(--surface);color:var(--text);box-shadow:0 2px 5px #0000000c}main{flex-direction:column;flex:1;min-height:0;display:flex}.dictionary{min-height:0;padding:0 max(16px, env(safe-area-inset-right)) env(safe-area-inset-bottom) max(16px, env(safe-area-inset-left));flex-direction:column;flex:1;display:flex;overflow-y:auto}.input-label{flex:none;margin:4px 0 8px;font-size:13px;font-weight:600;display:block}.search-field{background:var(--surface);border:1px solid var(--line);border-radius:14px;flex:none;align-items:center;gap:8px;margin-bottom:14px;padding:0 8px 0 14px;display:flex}.search-field:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--tint)}.search-icon{color:var(--muted);font-size:28px}.search-field input{width:100%;min-width:0;height:50px;color:var(--text);background:0 0;border:0;border-radius:10px;font-size:17px}.search-field input:focus{outline:none}.search-field input::placeholder{color:var(--muted)}.clear-input{width:44px;height:44px;color:var(--muted);background:0 0;border:0;border-radius:10px;flex-shrink:0;font-size:25px}.dictionary-card{border:1px solid var(--line);background:var(--surface);text-align:center;border-radius:24px;flex-direction:column;flex:1 0 auto;justify-content:center;padding:18px 20px;display:flex}.original-character{font-size:96px;font-weight:500;line-height:1.2}hr{background:var(--line);border:0;flex:none;width:100%;height:1px;margin:16px 0}.eyebrow{letter-spacing:.07em;color:var(--muted);font-size:13px;font-weight:500}.dictionary-code .root-sequence{margin-top:12px}.code-option+.code-option{border-top:1px solid var(--line);margin-top:12px;padding-top:10px}.code-label{color:var(--muted);margin-top:6px;font-size:11px}.licence-access{text-align:center;flex:none}.licence-button{min-height:44px;color:var(--muted);background:0 0;border:0;border-radius:10px;padding:8px 12px;font-size:12px}.licence-notice{width:min(480px,100% - 32px);max-height:calc(100dvh - 32px - env(safe-area-inset-top) - env(safe-area-inset-bottom));border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:20px;margin:auto;padding:20px;font-size:14px;line-height:1.8;overflow-y:auto}.licence-notice::backdrop{background:#0006}.licence-heading{justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px;display:flex}.licence-heading h2{font-size:18px}.close-licence{background:var(--tint);min-width:44px;min-height:44px;color:var(--accent);border:0;border-radius:10px}.licence-notice p+p{margin-top:12px}.licence-notice a{color:var(--accent);text-underline-offset:3px}.dictionary-load-message{color:var(--muted);flex:none;padding:8px 0;font-size:13px}.dictionary-load-message button{margin-top:8px}.root-sequence{vertical-align:middle;justify-content:center;gap:18px;display:inline-flex}.root-pair{flex-direction:column;align-items:center;min-width:28px;display:inline-flex}.root-symbol{font-size:30px;font-weight:600;line-height:1.3}.root-letter{margin-top:5px;font-size:14px;font-weight:600;line-height:1.3}.colour-0{color:var(--root-0)}.colour-1{color:var(--root-1)}.colour-2{color:var(--root-2)}.colour-3{color:var(--root-3)}.colour-4{color:var(--root-4)}.empty-state{flex-direction:column;justify-content:center;align-items:center;min-height:220px;display:flex}.empty-mark{color:var(--muted);opacity:.5;margin-bottom:12px;font-size:45px}.empty-state h3,.missing-state h3{font-size:16px;font-weight:600}.empty-state p,.missing-state p{color:var(--muted);max-width:240px;margin:8px auto 0;font-size:13px}.practice-loading{text-align:center;padding:24px 16px;overflow-y:auto}.practice-loading h2{margin-bottom:12px;font-size:20px}.practice-loading p{color:var(--muted);font-size:14px}.practice-loading button{margin:18px auto}.practice{flex-direction:column;flex:1;min-height:0;display:flex}.practice-content{min-height:0;padding:0 max(16px, env(safe-area-inset-right)) 0 max(16px, env(safe-area-inset-left));flex-direction:column;flex:1;scroll-padding-block:8px;display:flex;overflow-y:auto}.practice-question{text-align:center;flex-direction:column;flex:1 0 auto;justify-content:center;padding:8px 0;display:flex}.practice .original-character{margin:8px 0 12px;font-size:88px;line-height:1.2}.answer-display{border:1px solid var(--line);background:var(--surface);border-radius:18px;justify-content:center;align-items:center;min-height:68px;padding:8px;display:flex}.answer-display .root-sequence{gap:clamp(12px,4vw,22px)}.answer-display .root-symbol{font-size:25px}.answer-placeholder{color:var(--muted);font-size:14px}.feedback{padding-top:10px}.helper-message{color:var(--muted);font-size:12px}.success-message{color:var(--success);font-size:16px;font-weight:600}.correction-message{font-size:13px}.feedback .root-symbol{font-size:25px}.feedback-controls{flex-wrap:wrap;justify-content:center;align-items:center;gap:8px 20px;margin-top:8px;display:flex}.correct-answers{flex-direction:column;gap:8px;display:flex}.correct-answer .code-label{margin:0 0 4px}.next-button{background:var(--tint);min-width:135px;min-height:44px;color:var(--accent);border:0;border-radius:13px;padding:9px 18px;font-weight:600;display:block}.next-button span{margin-left:15px}.keyboard-dock{z-index:2;background:var(--keyboard);border-top:1px solid var(--line);border-radius:20px 20px 0 0;flex:none;width:100%;position:sticky;bottom:0}.keyboard{padding:35px max(6px, env(safe-area-inset-right)) calc(10px + env(safe-area-inset-bottom)) max(6px, env(safe-area-inset-left))}.keyboard-row{gap:5px;margin:0 auto 8px;display:flex}.row-1{width:90%}.row-2{width:70%}.root-key{background:var(--key);min-width:0;height:54px;box-shadow:0 1px 0 var(--key-shadow);border:0;border-radius:7px;flex-direction:column;flex:1;justify-content:center;align-items:center;padding:3px 0;display:flex}.root-key>span{font-size:20px;line-height:1.2}.root-key small{color:var(--muted);margin-top:3px;font-size:10px;line-height:1.1}.keyboard-actions{grid-template-columns:1fr 2fr;gap:8px;padding-top:1px;display:grid}.keyboard-actions button{border:0;border-radius:9px;min-height:46px;font-size:15px;font-weight:600}.delete-key{background:var(--key);box-shadow:0 1px 0 var(--key-shadow)}.delete-key span{margin-right:5px;font-size:19px}.confirm-key{background:var(--accent);color:var(--background)}.offline-status{color:var(--muted);text-align:center;flex:none;padding:6px 16px;font-size:12px}.offline-status button{border:1px solid var(--line);background:var(--surface);min-height:44px;color:var(--accent);border-radius:10px;margin:4px auto 0;padding:8px 12px;display:block}@media (height<=740px){.dictionary .original-character{font-size:76px}.dictionary-card{padding-block:14px}.practice-question{padding-block:4px}.practice .original-character{margin:4px 0 8px;font-size:60px}.answer-display{min-height:54px}.answer-display .root-symbol,.feedback .root-symbol{font-size:22px}.feedback .root-letter{margin-top:3px;font-size:12px}.feedback{padding-top:6px}.feedback-controls{margin-top:6px}.root-key{height:52px}}@media (height<=640px){.dictionary .original-character{font-size:64px}.dictionary-card{padding-block:10px}.dictionary hr{margin-block:10px}.dictionary-code .root-symbol{font-size:26px}.code-option+.code-option{margin-top:8px;padding-top:6px}.practice .original-character{font-size:52px}.practice-question{padding-block:0}.root-key{height:44px}.keyboard{padding-top:29px}.keyboard-row{margin-bottom:6px}}@media (width<=350px){.root-sequence{gap:12px}.dictionary-card{padding-inline:12px}}@media (orientation:landscape) and (height<=500px){.app-header{padding-top:calc(16px + env(safe-area-inset-top));padding-bottom:4px}.keyboard{padding-top:27px}.root-key{height:44px}.keyboard-row{margin-bottom:6px}}