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1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--radius-md: .5rem;--radius-lg: .75rem;--sidebar-width: 280px}:root.dark{--primary-color: #3b82f6;--primary-hover: #60a5fa;--bg-color: #0a1225;--text-main: #f8fafc;--text-muted: #94a3b8;--border-color: #1e293b;--card-bg: #10192c;--bg-hl-f1: rgba(236, 72, 153, .25);--text-hl-f1: #fbcfe8;--bg-hl-f2: rgba(234, 179, 8, .25);--text-hl-f2: #fef08a;--bg-hl-f3: rgba(168, 85, 247, .25);--text-hl-f3: #e9d5ff;--bg-hl-m1: rgba(59, 130, 246, .25);--text-hl-m1: #bfdbfe;--bg-hl-m2: rgba(34, 197, 94, .25);--text-hl-m2: #bbf7d0;--bg-hl-m3: rgba(249, 115, 22, .25);--text-hl-m3: #fed7aa;--bg-hl-n1: rgba(20, 184, 166, .25);--text-hl-n1: #99f6e4;--bg-hl-n2: rgba(6, 182, 212, .25);--text-hl-n2: #a5f3fc;--bg-hl-n3: rgba(99, 102, 241, .25);--text-hl-n3: #c7d2fe;--bg-hl-default: rgba(100, 116, 139, .25);--text-hl-default: #cbd5e1;--bg-hl-narrator: transparent;--text-hl-narrator: #94a3b8;--border-hl-narrator: #334155;color-scheme:dark}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:var(--bg-color);color:var(--text-main);display:flex;flex-direction:column;min-height:100vh;overflow-x:hidden}@media(max-width:899px){.hide-mobile{display:none!important}}.mobile-only{display:none!important}@media(max-width:899px){.mobile-only{display:flex!important}}rt,.sm-pinyin,.fc-pinyin,.fc-jyutping,.mfc-rom,.tt-rom{user-select:none;-webkit-user-select:none}.brand-text{font-family:UseYuBrand,sans-serif;font-size:1.6rem;font-weight:400;color:var(--primary-color);transition:color .3s,text-shadow .3s;letter-spacing:-.02em}:root.dark .brand-text{color:#60a5fa;text-shadow:0 0 12px rgba(96,165,250,.3)}.footer-brand-text{font-family:UseYuBrand,sans-serif;font-size:2.5rem;color:var(--text-muted);filter:grayscale(100%);opacity:.6;transition:opacity .3s,text-shadow .3s}:root.dark .footer-brand-text{color:#475569;text-shadow:0 0 10px rgba(255,255,255,.05);opacity:.8}.app-header{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-sm) var(--spacing-lg);background-color:var(--card-bg);border-bottom:1px solid var(--border-color);position:sticky;top:0;z-index:60;height:60px;box-shadow:0 1px 3px #00000005}.nav-toggle-btn{background:none;border:none;cursor:pointer;color:var(--text-muted);display:flex;align-items:center;justify-content:center;transition:color .2s}.nav-toggle-btn:hover{color:var(--primary-color)}.logo a{display:flex;align-items:center;gap:8px;text-decoration:none}.header-left{display:flex;align-items:center;gap:var(--spacing-sm);flex-shrink:0;padding-right:8px}.persistent-controls{display:flex;align-items:center;gap:4px;margin-left:auto}.xp-badge,.streak-badge{display:inline-flex;align-items:center;justify-content:center;height:32px;padding:0 6px;gap:4px;border-radius:16px;background:#ffffff0d;border:1px solid var(--border-color);cursor:pointer;transition:all .2s;font-family:system-ui,sans-serif}@media(min-width:600px){.header-left{gap:var(--spacing-md);padding-right:16px}.persistent-controls{gap:12px}.xp-badge,.streak-badge{padding:0 10px}}.app-layout{display:flex;flex:1;position:relative;width:100vw}.app-sidebar-wrapper{width:0;transition:width .3s ease;flex-shrink:0;position:relative}.pull-tab-wrapper{position:absolute;z-index:55;height:100%;pointer-events:none}.pull-tab{display:none;position:fixed;top:50%;left:var(--sidebar-width);transform:translateY(-50%);width:24px;height:48px;background:var(--card-bg);border:1px solid var(--border-color);border-left:none;border-radius:0 8px 8px 0;cursor:pointer;transition:left .3s ease;box-shadow:2px 0 4px #0000000d;color:var(--text-muted);pointer-events:auto}.pull-tab:hover{color:var(--primary-color)}body.sidebar-closed .pull-tab{left:0}body.sidebar-closed .pull-tab .pt-icon{transform:rotate(180deg)}.main-wrapper{flex:1;display:flex;flex-direction:column;min-height:calc(100vh - 60px);min-width:0}.app-content{flex:1 0 auto;padding:var(--spacing-md);width:100%;max-width:100%;min-height:100vh;margin:0 auto;transition:max-width .3s ease}.app-footer{flex-shrink:0;padding:40px 20px 20px;border-top:1px solid var(--border-color);background:var(--bg-color);width:100%}.footer-content{display:flex;flex-direction:column;gap:2rem;max-width:850px;margin:0 auto}@media(min-width:600px){.footer-content{flex-direction:row;justify-content:space-between}}.footer-brand{flex:1;max-width:400px}.footer-desc{font-size:.9rem;color:var(--text-muted);margin-top:1rem;line-height:1.6}.footer-links{display:flex;flex-direction:column;gap:.75rem}.footer-links a{color:var(--text-muted);text-decoration:none;font-size:.95rem;font-weight:500;transition:color .2s}.footer-links a:hover{color:var(--primary-color)}.footer-bottom{text-align:center;font-size:.8rem;color:var(--text-muted);margin-top:3rem;padding-top:1rem;border-top:1px dashed var(--border-color)}@media(min-width:900px){.app-sidebar-wrapper{width:var(--sidebar-width)}.pull-tab{display:flex;align-items:center;justify-content:center}.nav-toggle-btn{display:none!important}.app-content{max-width:850px;padding-top:var(--spacing-xl)}body.sidebar-closed .app-sidebar-wrapper{width:0;overflow:visible}body.sidebar-closed #sidebar-container{transform:translate(-100%)}}.tts-btn{position:relative;display:inline-flex;align-items:center;justify-content:center;background:var(--bg-color);border:1px solid var(--border-color);color:var(--text-muted);cursor:pointer;border-radius:50%;transition:all .2s;width:36px;height:36px;padding:7px}.tts-btn.btn-md{width:40px;height:40px;padding:8px}.tts-btn.btn-sm{width:30px;height:30px;padding:6px}.tts-btn:hover{background:var(--border-color);color:var(--text-main)}.tts-btn:active{transform:scale(.95)}.tts-btn svg{width:100%;height:100%;transition:opacity .2s}.tts-btn.playing{background:#2563eb1a;color:var(--primary-color);border-color:#2563eb4d;animation:pulse-ring 2s infinite}.tts-btn.loading svg{opacity:0}.tts-btn.loading:after{content:"";position:absolute;width:20px;height:20px;border:2px solid var(--primary-color);border-top-color:transparent;border-radius:50%;animation:spin .8s linear infinite}.hw-spinner{position:absolute;top:50%;left:50%;margin-top:-12px;margin-left:-12px;width:24px;height:24px;border:3px solid var(--border-color);border-top-color:var(--primary-color);border-radius:50%;animation:spin .8s linear infinite;z-index:5}@keyframes spin{to{transform:rotate(360deg)}}@keyframes pulse-ring{0%{box-shadow:0 0 #2563eb66}70%{box-shadow:0 0 0 6px #2563eb00}to{box-shadow:0 0 #2563eb00}}.hidden{display:none!important}#mobile-console-wrapper{position:fixed;bottom:20px;right:20px;z-index:999999}.mc-toggle{width:48px;height:48px;border-radius:50%;background:#0f172a;color:#fff;font-size:1.5rem;border:2px solid rgba(255,255,255,.2);cursor:pointer;box-shadow:0 4px 12px #0000004d;display:flex;align-items:center;justify-content:center}.mc-panel{position:absolute;bottom:60px;right:0;width:90vw;max-width:400px;height:50vh;background:#0f172a;border:1px solid #334155;border-radius:8px;box-shadow:0 10px 25px #00000080;display:flex;flex-direction:column;overflow:hidden}.mc-header{background:#1e293b;padding:8px 12px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #334155;color:#f8fafc;font-size:.85rem;font-weight:700}.mc-btn{background:#334155;border:none;color:#fff;padding:4px 8px;border-radius:4px;font-size:.75rem;cursor:pointer;margin-left:6px}.mc-logs{flex:1;overflow:scroll;padding:8px;font-family:monospace;font-size:.8rem;color:#e2e8f0;display:flex;flex-direction:column;gap:4px}.mc-log-entry{padding:4px;border-bottom:1px solid rgba(255,255,255,.05);word-break:break-all}.mc-warn{color:#fcd34d}.mc-error{color:#fca5a5}.persistent-loading-toast{position:fixed;bottom:80px;left:50%;transform:translate(-50%) translateY(20px) scale(.95);background:var(--primary-color);color:#fff;padding:12px 24px;border-radius:999px;font-weight:600;font-size:.95rem;box-shadow:0 10px 25px #2563eb66;display:flex;align-items:center;gap:12px;z-index:2147483647;opacity:0;pointer-events:none;transition:all .3s cubic-bezier(.4,0,.2,1)}.persistent-loading-toast.show{opacity:1;transform:translate(-50%) translateY(0) scale(1)}.plt-spinner{width:18px;height:18px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite}@keyframes astroFadeInOut{0%{opacity:1}to{opacity:0}}@keyframes astroFadeIn{0%{opacity:0;mix-blend-mode:plus-lighter}to{opacity:1;mix-blend-mode:plus-lighter}}@keyframes astroFadeOut{0%{opacity:1;mix-blend-mode:plus-lighter}to{opacity:0;mix-blend-mode:plus-lighter}}@keyframes astroSlideFromRight{0%{transform:translate(100%)}}@keyframes astroSlideFromLeft{0%{transform:translate(-100%)}}@keyframes astroSlideToRight{to{transform:translate(100%)}}@keyframes astroSlideToLeft{to{transform:translate(-100%)}}@media(prefers-reduced-motion){::view-transition-group(*),::view-transition-old(*),::view-transition-new(*){animation:none!important}[data-astro-transition-scope]{animation:none!important}}