:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;--text-color: rgba(255, 255, 255, .87);--bg-color: #242424;--muted-color: #bfbfbf;--link-color: #646cff;--button-bg: #1a1a1a;--button-text: var(--text-color);--card-bg: #1e1e1e;--card-text: rgba(255, 255, 255, .87);--border-color: rgba(255, 255, 255, .1);--border-light: rgba(255, 255, 255, .05);--popup-bg: #2a2a2a;--popup-text: rgba(255, 255, 255, .87);--popup-muted: rgba(255, 255, 255, .6);--pinyin-color: rgba(255, 255, 255, .7);color:var(--text-color);background-color:var(--bg-color);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:var(--link-color);text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:var(--button-bg);color:var(--button-text);cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}.card{padding:16px;border-radius:8px;border:1px solid rgba(0,0,0,.08);box-shadow:0 1px 3px #0000000f;background-color:var(--card-bg);color:var(--card-text)}.muted{font-size:12px;color:var(--muted-color);margin-top:4px}[data-theme=light]{--text-color: #213547;--bg-color: #ffffff;--muted-color: #666666;--button-bg: #f9f9f9;--button-text: #213547;--link-color: #646cff;--card-bg: #ffffff;--card-text: #213547;--border-color: rgba(0, 0, 0, .1);--border-light: rgba(0, 0, 0, .05);--popup-bg: #ffffff;--popup-text: #111;--popup-muted: #666;--pinyin-color: #444}[data-theme=dark]{--text-color: rgba(255, 255, 255, .87);--bg-color: #242424;--muted-color: #bfbfbf;--button-bg: #1a1a1a;--button-text: var(--text-color);--link-color: #646cff;--card-bg: #1e1e1e;--card-text: rgba(255, 255, 255, .87);--border-color: rgba(255, 255, 255, .1);--border-light: rgba(255, 255, 255, .05);--popup-bg: #2a2a2a;--popup-text: rgba(255, 255, 255, .87);--popup-muted: rgba(255, 255, 255, .6);--pinyin-color: rgba(255, 255, 255, .7)}@media(prefers-color-scheme:light){:root{--text-color: #213547;--bg-color: #ffffff;--muted-color: #666666;--button-bg: #f9f9f9;--button-text: #213547;--link-color: #646cff;--card-bg: #ffffff;--card-text: #213547;--border-color: rgba(0, 0, 0, .1);--border-light: rgba(0, 0, 0, .05);--popup-bg: #ffffff;--popup-text: #111;--popup-muted: #666;--pinyin-color: #444}a:hover{color:#747bff}button{background-color:var(--button-bg);color:var(--button-text)}}#root{max-width:1280px;margin:0 auto;padding:2rem;text-align:center}.logo{height:6em;padding:1.5em;will-change:filter;transition:filter .3s}.logo:hover{filter:drop-shadow(0 0 2em #646cffaa)}.logo.react:hover{filter:drop-shadow(0 0 2em #61dafbaa)}@keyframes logo-spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media(prefers-reduced-motion:no-preference){a:nth-of-type(2) .logo{animation:logo-spin infinite 20s linear}}.card{padding:2em}.read-the-docs{color:#888}.word-token{cursor:help;transition:background .12s;position:relative;display:inline-block}.word-token:hover{background:#ffe66440}.word-token:after{content:none}.word-token:before{content:none}.word-token ruby{ruby-position:over;display:inline-flex;flex-direction:column-reverse;align-items:center;line-height:1;gap:.06rem;font-size:1.04em}.word-token ruby rt{font-size:.58em;color:var(--pinyin-color);line-height:1;display:block;transform:translateY(-.02em);font-weight:500}.token-popup{position:absolute;bottom:135%;left:50%;transform:translate(-50%) translateY(6px);display:flex;flex-direction:column;align-items:center;gap:6px;padding:8px 10px;border-radius:8px;background:var(--popup-bg);color:var(--popup-text);box-shadow:0 8px 24px #0000004d;min-width:120px;opacity:0;visibility:hidden;pointer-events:none;z-index:50;transition:opacity .12s ease,transform .12s ease,visibility .12s ease}.word-token:hover .token-popup,.word-token:focus .token-popup,.word-token:focus-within .token-popup{opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%) translateY(0)}.token-popup .popup-pinyin{font-weight:700;font-size:.92em}.token-popup .popup-english{font-size:.82em;color:var(--popup-muted)}.token-popup .popup-actions{display:flex;gap:8px;align-items:center;margin-top:4px}.token-popup:after{content:"";position:absolute;bottom:-8px;left:50%;transform:translate(-50%);border-width:8px 8px 0 8px;border-style:solid;border-color:var(--popup-bg) transparent transparent transparent;filter:drop-shadow(0 -2px 4px rgba(0,0,0,.06))}.word-token:focus:after,.word-token:focus:before{opacity:1}.word-token:focus{outline:none;box-shadow:0 0 0 3px #6495ff2e}.token-popup .speak-btn{display:inline-flex;align-items:center;justify-content:center;height:28px;min-width:36px;padding:4px 8px;font-size:16px;background:var(--popup-bg);border:1px solid var(--border-color);border-radius:6px;line-height:1;cursor:pointer;transition:transform .14s ease,opacity .12s ease;box-shadow:0 2px 6px #0000001a;z-index:55}.token-popup .speak-btn:hover{transform:translateY(-2px) scale(1.08)}.token-popup .save-btn{display:inline-flex;align-items:center;justify-content:center;height:28px;min-width:36px;padding:4px 8px;font-size:14px;color:#ffb400;background:var(--popup-bg);border:1px solid var(--border-color);border-radius:6px;line-height:1;cursor:pointer;transition:transform .14s ease,opacity .12s ease;box-shadow:0 2px 6px #0000001a;z-index:55}.token-popup .save-btn:hover{transform:translateY(-2px) scale(1.04)}.token-popup .save-btn[disabled]{opacity:.6;cursor:default}.word-token ruby rt{position:relative;z-index:30}.token-popup .saved-confirm{background:#2d8f2d;color:#fff;padding:4px 8px;border-radius:6px;font-weight:600;font-size:.82em;white-space:nowrap;box-shadow:0 2px 8px #00000014}.learn-toggle{padding:4px 8px;border-radius:6px;border:1px solid var(--border-color);background:var(--button-bg);color:var(--button-text);cursor:pointer;font-size:.85em}.learn-toggle[aria-pressed=true]{background:#2db92d26;border-color:#2db92d66;color:#2db92d;font-weight:600}.learn-toggle[disabled]{opacity:.5;cursor:default}