:root{color:#1b1f24;background:#eef1f4;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}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh}button,input{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}.appShell{--app-bg: #f3f5f6;--app-grid: rgba(33, 44, 56, .04);--bar-bg: rgba(255, 255, 255, .88);--panel-bg: rgba(249, 250, 251, .94);--surface-bg: #ffffff;--text: #1b1f24;--heading: #17212b;--muted: #59636e;--border: #d8dde2;--button-bg: #ffffff;--button-border: #cdd4db;--button-text: #1f2933;--selected-bg: #e7f7f9;--selected-border: #0b7285;--selected-text: #075d6b;--paper-shadow: 0 20px 46px rgba(32, 42, 54, .16);--paper-ring: rgba(51, 64, 77, .14);--pdf-filter: none;--light-core: rgba(255, 255, 245, .98);--light-mid: rgba(252, 210, 105, .58);--light-edge: rgba(11, 114, 133, .2);--light-glow-warm: rgba(214, 156, 38, .2);--light-glow-cool: rgba(11, 114, 133, .08);--word-lit-0: rgba(191, 122, 12, .72);--word-lit-1: rgba(122, 82, 13, .52);--word-lit-2: rgba(34, 59, 67, .3);--word-shadow: rgba(36, 48, 58, .13);--pronounce-text: #5d3b05;--pronounce-muted: rgba(86, 58, 15, .66);--pronounce-active-text: #6a4206;--pronounce-glow-core: rgba(255, 199, 64, .22);--pronounce-glow-edge: rgba(163, 93, 6, .08);--pronounce-shadow: rgba(132, 78, 9, .18);--flip-source-core: #6f4507;--flip-source-mid: #94650d;--flip-source-edge: #263238;--flip-translation-core: #6f4507;--flip-translation-mid: #8c5a05;--translation-text: #075d6b;--translation-bg: rgba(255, 255, 255, .86);--translation-shadow: rgba(36, 48, 58, .1);--translation-veil-solid: rgba(255, 255, 255, .96);--translation-veil-mid: rgba(255, 255, 255, .84);--translation-veil-edge: rgba(255, 255, 255, 0);--liquid-tint: rgba(255, 255, 255, .44);--liquid-edge: rgba(255, 255, 255, .86);--liquid-rim: rgba(77, 190, 211, .42);--liquid-shadow: rgba(31, 48, 60, .18);--liquid-caustic: rgba(255, 210, 95, .28);min-height:100vh;display:flex;flex-direction:column;background:linear-gradient(90deg,var(--app-grid) 1px,transparent 1px),linear-gradient(180deg,var(--app-grid) 1px,transparent 1px),var(--app-bg);background-size:28px 28px;color:var(--text);transition:background .18s ease,color .18s ease}.appShell[data-theme=night]{--app-bg: #080b0f;--app-grid: rgba(247, 214, 137, .035);--bar-bg: rgba(12, 17, 23, .9);--panel-bg: rgba(13, 18, 24, .94);--surface-bg: #050608;--text: #e6edf3;--heading: #f4efe3;--muted: #9aa8b3;--border: #26313b;--button-bg: #141b22;--button-border: #2a3540;--button-text: #e6edf3;--selected-bg: rgba(255, 206, 100, .14);--selected-border: rgba(255, 206, 100, .48);--selected-text: #ffd77a;--paper-shadow: 0 24px 60px rgba(0, 0, 0, .52);--paper-ring: rgba(255, 218, 128, .1);--pdf-filter: invert(1) hue-rotate(180deg) contrast(.93) brightness(.82) sepia(.08);--light-core: rgba(255, 250, 221, .98);--light-mid: rgba(255, 214, 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