*,*:before,*:after{box-sizing:border-box}:root{--bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);--text-primary: #f8fafc;--text-secondary: #94a3b8;--glass-bg: rgba(255, 255, 255, .05);--glass-border: rgba(255, 255, 255, .1);--glass-highlight: rgba(255, 255, 255, .2);--accent-blue: #3b82f6;--accent-purple: #8b5cf6;--accent-pink: #ec4899;--stroke-highlight: #f472b6;--stroke-normal: #94a3b8;--practice-bg-start: rgba(59, 130, 246, .1);--practice-bg-end: rgba(139, 92, 246, .1);--practice-border: rgba(139, 92, 246, .2);--card-shadow: 0 8px 32px 0 rgba(0, 0, 0, .37);font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:dark;color:var(--text-primary);background:var(--bg-gradient)}[data-theme=green]{--bg-gradient: linear-gradient(135deg, #053e26 0%, #0b1f17 100%);--accent-blue: #58cc02;--accent-purple: #10b981;--accent-pink: #fbbf24;--stroke-highlight: #58cc02;--practice-bg-start: rgba(88, 204, 2, .12);--practice-bg-end: rgba(16, 185, 129, .12);--practice-border: rgba(88, 204, 2, .3);--glass-bg: rgba(255, 255, 255, .04);--glass-border: rgba(88, 204, 2, .2);--glass-highlight: rgba(88, 204, 2, .35)}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh;background-attachment:fixed}#root{max-width:1280px;margin:0 auto;padding:2rem;width:100%}button{cursor:pointer}.glass-panel{background:var(--glass-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--glass-border);border-radius:16px;box-shadow:var(--card-shadow)}.btn-primary{background:linear-gradient(90deg,var(--accent-blue),var(--accent-purple));border:none;color:#fff;padding:12px 24px;border-radius:8px;font-weight:600;transition:transform .2s,box-shadow .2s}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 4px 12px #8b5cf666}@media(max-width:768px){body{place-items:flex-start;height:100vh;height:100dvh;overflow:hidden}#root{padding:.5rem;width:100%;height:100%;overflow:hidden}}.settings-container{position:relative;display:inline-block;z-index:150}.settings-toggle-btn{background:#ffffff1a;border:1px solid var(--glass-border);color:var(--text-primary);width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);outline:none;box-shadow:0 4px 12px #00000026}.settings-toggle-btn:hover{background:#fff3;transform:scale(1.05);border-color:var(--glass-highlight)}.settings-icon{transition:transform .6s cubic-bezier(.4,0,.2,1)}.settings-icon.rotate{transform:rotate(90deg)}.settings-dropdown{position:absolute;top:calc(100% + 8px);right:0;width:220px;padding:1.25rem;display:flex;flex-direction:column;gap:1rem;animation:slideDown .25s cubic-bezier(.4,0,.2,1) forwards;transform-origin:top right}@keyframes slideDown{0%{opacity:0;transform:scale(.95) translateY(-5px)}to{opacity:1;transform:scale(1) translateY(0)}}.settings-title{margin:0;font-size:1rem;font-weight:700;color:var(--text-primary);border-bottom:1px solid var(--glass-border);padding-bottom:.5rem;letter-spacing:.02em}.settings-section{display:flex;flex-direction:column;gap:.5rem}.settings-section label{font-size:.8rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em}.settings-options-group{display:flex;gap:.5rem;width:100%}.settings-option-btn{flex:1;background:#ffffff0d;border:1px solid var(--glass-border);color:var(--text-secondary);padding:.5rem;border-radius:8px;font-size:.85rem;font-weight:600;transition:all .2s;display:flex;align-items:center;justify-content:center;gap:.4rem}.settings-option-btn:hover{background:#ffffff1a;color:var(--text-primary);border-color:var(--glass-highlight)}.settings-option-btn.active{background:linear-gradient(135deg,var(--accent-blue) 0%,var(--accent-purple) 100%);border-color:transparent;color:#fff;box-shadow:0 4px 12px #58cc0233}.theme-dot{width:10px;height:10px;border-radius:50%;display:inline-block;border:1px solid rgba(255,255,255,.2)}.theme-indigo-dot{background:#3b82f6}.theme-green-dot{background:#58cc02}.search-bar-container{position:relative;width:140px;max-width:100%;z-index:120;transition:width .3s cubic-bezier(.4,0,.2,1)}.search-input-wrapper{position:relative;display:flex;align-items:center;width:100%}.search-input{width:100%;background:#ffffff14;border:1px solid var(--glass-border);border-radius:20px;padding:.5rem 1.8rem;font-size:16px;color:var(--text-primary);outline:none;transition:all .3s cubic-bezier(.4,0,.2,1);box-shadow:0 4px 12px #0000001a}.search-input:focus{background:#ffffff26;border-color:var(--accent-blue);box-shadow:0 4px 16px #58cc0226}.search-bar-container:focus-within{width:220px}.search-input::placeholder{color:var(--text-secondary);opacity:.7}.search-icon{position:absolute;left:12px;color:var(--text-secondary);pointer-events:none;transition:color .3s}.search-input:focus~.search-icon{color:var(--accent-blue)}.clear-search-btn{position:absolute;right:12px;background:none;border:none;color:var(--text-secondary);font-size:1.1rem;cursor:pointer;line-height:1;display:flex;align-items:center;justify-content:center;padding:0;width:18px;height:18px}.clear-search-btn:hover{color:var(--text-primary)}.search-results-dropdown{position:absolute;top:calc(100% + 8px);left:0;right:0;max-height:320px;overflow-y:auto;padding:.5rem;display:flex;flex-direction:column;gap:.25rem;animation:searchDropdownSlide .2s ease-out forwards;transform-origin:top center}@keyframes searchDropdownSlide{0%{opacity:0;transform:translateY(-8px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}.search-result-item{display:flex;align-items:center;gap:.75rem;padding:.6rem .8rem;border-radius:8px;cursor:pointer;transition:all .2s;border:1px solid transparent}.search-result-item:hover{background:#ffffff14;border-color:var(--glass-border);transform:translate(2px)}.result-char{font-size:1.3rem;font-weight:700;color:var(--text-primary);min-width:24px;text-align:center}.result-details{display:flex;flex-direction:column;overflow:hidden;flex:1}.result-pinyin{font-size:.8rem;font-weight:600;color:var(--accent-blue)}.result-english{font-size:.7rem;color:var(--text-secondary);white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.search-no-results{padding:1rem;text-align:center;color:var(--text-secondary);font-size:.8rem;font-style:italic}@media(max-width:600px){.search-bar-container,.search-bar-container:focus-within{width:110px}.search-input:focus{width:110px}.search-input{padding:.4rem 1.6rem;font-size:16px}.search-icon{left:6px}.clear-search-btn{right:6px}}.home-container{display:flex;flex-direction:column;align-items:center;padding-top:140px;min-height:100vh;gap:3rem;box-sizing:border-box}.home-header{text-align:center;position:relative;width:100%}.home-lang-toggle{position:fixed;top:1rem;right:1rem;z-index:100;display:flex;align-items:center;gap:.75rem}.title{font-size:3.5rem;font-weight:800;background:linear-gradient(135deg,var(--accent-blue) 0%,var(--accent-purple) 100%);background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin:0;letter-spacing:-.05em;margin-bottom:.5rem}.subtitle{font-size:1.25rem;color:var(--text-secondary);margin:0}.menu-grid{display:flex;flex-direction:column;gap:1rem;width:75%;max-width:480px}.menu-card{background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:16px;padding:1.5rem;color:var(--text-primary);text-align:left;position:relative;overflow:hidden;transition:all .3s cubic-bezier(.4,0,.2,1)}.menu-card:hover{background:#ffffff1a;transform:translateY(-2px);border-color:var(--glass-highlight);box-shadow:0 10px 30px -10px #00000080}.practice-card{text-align:center;padding:1.5rem;background:linear-gradient(135deg,var(--practice-bg-start) 0%,var(--practice-bg-end) 100%);border:1px solid var(--practice-border);height:80px;display:flex;flex-direction:column;justify-content:center;align-items:center;box-sizing:border-box;width:100%}.practice-card h2{font-size:1.25rem;margin:0}.practice-card p{display:none}.practice-card:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--level-color);opacity:.7}.levels-container{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.level-card{display:flex;align-items:center;justify-content:center;padding:1.5rem;width:100%;height:80px;box-sizing:border-box}.level-card:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--level-color);opacity:.7}.level-info h3{margin:0;font-size:1.25rem}.level-info .count{font-size:.875rem;color:var(--text-secondary);opacity:.8}@media(max-width:600px){.home-container{padding-top:80px;height:100dvh;overflow:hidden;justify-content:flex-start;gap:1.5rem}.levels-container{grid-template-columns:1fr}}#character-target{display:flex;justify-content:center;align-items:center}#character-target svg{width:100%;height:100%}.stroke-order-container{padding:1rem;margin-top:.5rem;width:100%;box-sizing:border-box}.stroke-meta-header{font-size:1rem;color:var(--text-secondary);margin-bottom:1rem;display:flex;align-items:center}.stroke-meta-header strong{color:var(--text-primary);margin-right:.3rem}.stroke-grid{display:flex;flex-wrap:wrap;gap:1rem;justify-content:center}.stroke-cell{width:80px;height:80px;background:#00000040;border-radius:8px;position:relative;border:1px solid var(--glass-border);display:flex;align-items:center;justify-content:center;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100'%3E%3Cline x1='0' y1='0' x2='100' y2='100' stroke='rgba(255,255,255,0.06)' stroke-dasharray='2,2'/%3E%3Cline x1='100' y1='0' x2='0' y2='100' stroke='rgba(255,255,255,0.06)' stroke-dasharray='2,2'/%3E%3Cline x1='50' y1='0' x2='50' y2='100' stroke='rgba(255,255,255,0.06)' stroke-dasharray='2,2'/%3E%3Cline x1='0' y1='50' x2='100' y2='50' stroke='rgba(255,255,255,0.06)' stroke-dasharray='2,2'/%3E%3Crect x='0' y='0' width='100' height='100' fill='none' stroke='rgba(255,255,255,0.12)' stroke-width='1'/%3E%3C/svg%3E");background-size:70px 70px;background-position:center;background-repeat:no-repeat}.stroke-svg{width:100%;height:100%;padding:5px;box-sizing:border-box}.stroke-num{position:absolute;bottom:2px;right:5px;font-size:.75rem;color:var(--text-secondary);opacity:.6}.stroke-grid-loading{padding:1rem;color:var(--text-secondary);font-style:italic}@media(max-width:768px){.stroke-order-container{padding:.2rem;margin-top:0;flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain}.stroke-meta-header{margin-bottom:.5rem;font-size:.9rem}}.radical-btn{background:#ffffff14;border:1px solid var(--glass-border);color:var(--accent-blue);padding:.15rem .5rem;border-radius:12px;font-size:.9rem;font-weight:700;cursor:pointer;transition:all .2s;margin-left:.2rem;line-height:1.2;display:inline-flex;align-items:center}.radical-btn:hover{background:#ffffff26;border-color:var(--glass-highlight);transform:scale(1.05)}.radical-explorer{background:#00000040;border:1px solid var(--glass-border);border-radius:12px;padding:.8rem;margin-bottom:1rem;animation:fadeIn .2s ease-in-out}.radical-explorer-header{display:flex;justify-content:space-between;align-items:center;font-size:.85rem;color:var(--text-secondary);margin-bottom:.6rem}.radical-explorer-header .close-btn{background:none;border:none;color:var(--text-secondary);font-size:1.2rem;cursor:pointer;line-height:1;padding:0 .2rem}.radical-explorer-header .close-btn:hover{color:var(--text-primary)}.radical-chars-grid{display:flex;flex-wrap:wrap;gap:.4rem;max-height:120px;overflow-y:auto;padding-right:.2rem}.radical-chars-grid::-webkit-scrollbar{width:4px}.radical-chars-grid::-webkit-scrollbar-thumb{background:#ffffff26;border-radius:2px}.radical-char-btn{background:var(--glass-bg);border:1px solid var(--glass-border);color:var(--text-primary);width:32px;height:32px;border-radius:8px;font-size:.95rem;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s}.radical-char-btn:hover{background:var(--glass-highlight);border-color:var(--accent-blue);transform:translateY(-1px)}@keyframes fadeIn{0%{opacity:0;transform:translateY(-5px)}to{opacity:1;transform:translateY(0)}}.char-page-container{display:flex;flex-direction:column;gap:1.5rem;max-width:1000px;margin:0 auto;width:100%}.page-header{display:flex;justify-content:space-between;align-items:center;width:100%}.back-btn{background:none;border:none;color:var(--text-secondary);font-size:1.1rem;padding:.5rem 0;cursor:pointer}.back-btn:hover{color:var(--text-primary)}.lang-toggle{background:#ffffff1a;border:1px solid var(--glass-border);color:var(--text-primary);padding:.5rem 1rem;border-radius:20px;cursor:pointer;font-size:.9rem;transition:all .2s}.lang-toggle:hover{background:#fff3;transform:translateY(-1px)}.top-section{display:grid;grid-template-columns:1fr 1fr;gap:2rem;min-height:350px}.left-panel{display:flex;flex-direction:column;align-items:center;gap:1rem}.canvas-container{padding:2rem;background:#00000040;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100'%3E%3Cline x1='0' y1='0' x2='100' y2='100' stroke='rgba(255,255,255,0.06)' stroke-dasharray='2,2'/%3E%3Cline x1='100' y1='0' x2='0' y2='100' stroke='rgba(255,255,255,0.06)' stroke-dasharray='2,2'/%3E%3Cline x1='50' y1='0' x2='50' y2='100' stroke='rgba(255,255,255,0.06)' stroke-dasharray='2,2'/%3E%3Cline x1='0' y1='50' x2='100' y2='50' stroke='rgba(255,255,255,0.06)' stroke-dasharray='2,2'/%3E%3Crect x='0' y='0' width='100' height='100' fill='none' stroke='rgba(255,255,255,0.12)' stroke-width='1'/%3E%3C/svg%3E");background-size:260px 260px;background-position:center;background-repeat:no-repeat}.feedback-text{min-height:1.5rem;color:var(--accent-pink);font-weight:500}.right-panel{padding:2rem 1rem 2rem 2rem;display:flex;flex-direction:column;gap:1rem;max-height:600px;overflow-y:auto}.right-panel::-webkit-scrollbar{width:6px}.right-panel::-webkit-scrollbar-track{background:transparent}.right-panel::-webkit-scrollbar-thumb{background:#fff3;border-radius:3px}.right-panel::-webkit-scrollbar-thumb:hover{background:#fff6}.header-info{display:flex;align-items:baseline;gap:1.5rem;border-bottom:1px solid var(--glass-border);padding-bottom:.5rem;margin-bottom:0}.definition h3,.words-section h3{margin-top:0;margin-bottom:.5rem}.def-text{margin-top:0;margin-bottom:.5rem;line-height:1.6}.meta-info{color:var(--text-secondary);font-size:.9rem;margin-top:.5rem}.meta-info strong{color:var(--text-primary)}.header-info h1{font-size:3rem;margin:0;line-height:1}.pinyin{font-size:1.5rem;color:var(--accent-blue);font-weight:300}.bottom-section{display:none}.words-section ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:1rem}.words-section li{display:flex;justify-content:flex-start;align-items:flex-start;padding:.5rem;background:#ffffff08;border-radius:8px;gap:1.5rem}.zh{font-weight:600;color:var(--text-primary);white-space:nowrap;flex-shrink:0}.en{color:var(--text-secondary)}.control-bar{position:fixed;bottom:2rem;left:50%;transform:translate(-50%);display:flex;gap:1rem;padding:1rem;z-index:100}.control-bar button{background:transparent;border:none;color:var(--text-primary);padding:.75rem 1.5rem;border-radius:8px;font-size:1.1rem;display:flex;align-items:center;gap:.5rem;transition:background .2s}.control-bar button:hover{background:#ffffff1a}.control-bar button.active{background:var(--accent-blue);color:#fff}.control-bar button:disabled{opacity:.4;cursor:not-allowed}.control-bar button:disabled:hover{background:transparent}.write-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:#0009;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:200;animation:fadeIn .2s ease}.write-popup{display:flex;flex-direction:column;align-items:center;gap:.75rem;padding:1.5rem;animation:popIn .2s ease}.write-popup .canvas-container{background:#0000004d;border-radius:12px;padding:10px;width:270px;height:270px;display:flex;align-items:center;justify-content:center;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100'%3E%3Cline x1='0' y1='0' x2='100' y2='100' stroke='rgba(255,255,255,0.06)' stroke-dasharray='2,2'/%3E%3Cline x1='100' y1='0' x2='0' y2='100' stroke='rgba(255,255,255,0.06)' stroke-dasharray='2,2'/%3E%3Cline x1='50' y1='0' x2='50' y2='100' stroke='rgba(255,255,255,0.06)' stroke-dasharray='2,2'/%3E%3Cline x1='0' y1='50' x2='100' y2='50' stroke='rgba(255,255,255,0.06)' stroke-dasharray='2,2'/%3E%3Crect x='0' y='0' width='100' height='100' fill='none' stroke='rgba(255,255,255,0.12)' stroke-width='1'/%3E%3C/svg%3E");background-size:240px 240px;background-position:center;background-repeat:no-repeat}.write-popup .canvas-container svg{max-width:none!important}.write-popup .feedback-text{color:var(--accent-pink);font-weight:500;font-size:.9rem;min-height:1.5rem;text-align:center}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes popIn{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}@media(max-width:768px){.char-page-container{padding:.5rem;height:100vh;height:100dvh;width:auto;max-width:100%;padding-bottom:90px;overflow:hidden;box-sizing:border-box;gap:1rem}.top-section{grid-template-columns:1fr 1fr;gap:.5rem;flex:1;height:auto;min-height:0;align-items:stretch}.left-panel{order:unset;width:100%;overflow:hidden;gap:10px;height:100%;max-height:unset;padding-bottom:0;display:flex;flex-direction:column}.scroll-area{flex:1;min-height:0;overflow:hidden;display:flex;flex-direction:column;width:100%}.scroll-area::-webkit-scrollbar{display:none}.feedback-text{min-height:0;margin:0}.canvas-container{padding:.1rem;width:100%;display:flex;justify-content:center;align-items:center;border-radius:12px;align-self:center;flex-shrink:0;background-size:146px 146px}.canvas-container svg{width:100%;height:auto;max-width:180px}.right-panel{height:100%;max-height:unset;overflow-y:auto;overscroll-behavior:contain;padding:.5rem;padding-bottom:0;gap:4px}.header-info{gap:.5rem;flex-direction:row;align-items:baseline;margin-bottom:.5rem;padding-bottom:.25rem}.header-info h1{font-size:24px}.pinyin{font-size:1rem}.definition h3,.words-section h3{font-size:1rem;margin-bottom:.25rem}.def-text,.zh,.en{font-size:.8rem}.words-section li{padding:.25rem;gap:.5rem}.control-bar{width:95%;justify-content:space-around;bottom:1rem;padding:.5rem;gap:.25rem}.control-bar button{padding:.5rem;font-size:.85rem;flex:1;justify-content:center}}