:root{--font-sans:ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans", Arial, sans-serif;font-family:var(--font-sans);--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:#ffffffde;font-synthesis:none;font-synthesis-weight:none;font-synthesis-style:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;--primary-color:#f26b5a;--primary-color-hover:#d9523f;--secondary-color:#118ab2;--success-color:#06d6a0;--danger-color:#ef476f;--bg-color:#121212;--surface-color:#1e1e1e;--surface-color-light:#2c2c2c;--text-main:#fff;--text-muted:#a0a0a0;--border-color:#333;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-full:9999px;--spacing-1:4px;--spacing-2:8px;--spacing-3:12px;--spacing-4:16px;--spacing-5:20px;--spacing-6:24px;--spacing-8:32px;--spacing-10:40px;--spacing-12:48px;--shadow-sm:0 1px 2px #0003;--shadow-md:0 4px 6px #0000004d;--shadow-lg:0 10px 15px #0006;--safe-area-top:env(safe-area-inset-top,0px);--safe-area-right:env(safe-area-inset-right,0px);--safe-area-bottom:env(safe-area-inset-bottom,0px);--safe-area-left:env(safe-area-inset-left,0px);--safe-area-bottom-effective:var(--safe-area-bottom);--bottom-nav-safe-area-bottom:var(--safe-area-bottom-effective);--app-viewport-width:100vw;--app-viewport-height:100dvh;--ui-scale:.92;--app-edge-gap:12px;--app-edge-left:calc(var(--safe-area-left) + var(--app-edge-gap));--app-edge-right:calc(var(--safe-area-right) + var(--app-edge-gap));--app-edge-top:calc(var(--safe-area-top) + var(--app-edge-gap));--app-edge-bottom:calc(var(--safe-area-bottom-effective) + var(--app-edge-gap));--bottom-nav-base-height:56px;--bottom-nav-height:calc(var(--bottom-nav-base-height) + var(--bottom-nav-safe-area-bottom));--bottom-nav-gap:8px;--app-viewport-offset-left:0px;--app-viewport-offset-top:0px;--lesson-selected-border:#1899d6;--lesson-selected-fill:#1899d626;--lesson-correct-fill:#06d6a01a;--lesson-error-border:#f25d5d;--lesson-error-fill:#f25d5d1a;--lesson-hearts:#ff4b4b;--lesson-check-disabled-bg:#333;--lesson-check-disabled-text:#777;--interstitial-bg:#131f24;--interstitial-text:#fff;--interstitial-border:#ffffff1a;--accent-green:#58cc02;--accent-green-shadow:#46a302;--accent-blue:#1cb0f6;--accent-blue-shadow:#1899d6;--accent-pink:#ff8bc1;--accent-gold:#ffd166;--accent-purple:#ce82ff;--accent-red:#ff4b4b;--error-shadow:#c43d3d;--accent-color:var(--primary-color);background-color:#242424;font-weight:400;line-height:1.5}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}@media (prefers-color-scheme:light){:root{color:#213547;--bg-color:#f8f9fa;--surface-color:#fff;--surface-color-light:#f0f2f5;--text-main:#1a1a1a;--text-muted:#666;--border-color:#e0e0e0;--shadow-sm:0 1px 2px #0000000d;--shadow-md:0 4px 6px #0000001a;--shadow-lg:0 10px 15px #00000026;--lesson-selected-fill:#1899d61a;--lesson-check-disabled-bg:#e5e5e5;--lesson-check-disabled-text:#afafaf;background-color:#fff}}html{zoom:var(--ui-scale);width:100%;height:100%;min-height:100dvh;overflow:hidden}body{font-family:var(--font-sans);font-synthesis:none;font-synthesis-weight:none;font-synthesis-style:none;background-color:var(--bg-color);min-width:0;height:100%;min-height:100dvh;color:var(--text-main);-webkit-overflow-scrolling:touch;width:100%;margin:0;display:flex;overflow:hidden}#root,.mobile-app-wrapper{background-color:var(--bg-color);flex-direction:column;width:100%;max-width:none;height:100%;min-height:100dvh;display:flex;position:relative;overflow:hidden}@media (width<=767px){:root{--safe-area-bottom-effective:max(var(--safe-area-bottom), 16px);--bottom-nav-safe-area-bottom:min(var(--safe-area-bottom), 8px)}html,body{width:var(--app-viewport-width);height:var(--app-viewport-height);min-height:var(--app-viewport-height);max-width:none;max-height:none}body{display:block}#root{left:var(--app-viewport-offset-left);top:var(--app-viewport-offset-top);width:var(--app-viewport-width);height:var(--app-viewport-height);min-height:var(--app-viewport-height);max-width:none;max-height:none;position:fixed}.mobile-app-wrapper{width:100%;max-width:none;height:100%;min-height:0;max-height:none;position:relative;inset:auto}}@media (width>=768px){html,body{position:static;overflow:auto}.mobile-app-wrapper{height:100%}}h1,h2,h3,h4,h5,h6{margin-top:0;margin-bottom:var(--spacing-4);font-weight:700}p{margin-top:0;margin-bottom:var(--spacing-4)}*{box-sizing:border-box}button{border-radius:var(--radius-lg);padding:14px var(--spacing-6);cursor:pointer;justify-content:center;align-items:center;gap:var(--spacing-2);border:none;font-family:inherit;font-size:16px;font-weight:700;transition:all .2s cubic-bezier(.4,0,.2,1);display:flex}button:active{transform:translateY(2px)}button:disabled{opacity:.5;cursor:not-allowed;transform:none}button.primary{background-color:var(--primary-color);color:#fff;box-shadow:0 4px #b03e2d}button.primary:active{transform:translateY(4px);box-shadow:0 0 #b03e2d}button.secondary{color:var(--text-main);border:2px solid var(--border-color);box-shadow:0 4px 0 var(--border-color);background-color:#0000}button.secondary:active{box-shadow:0 0 0 var(--border-color);transform:translateY(4px)}button.ghost{color:var(--primary-color);background-color:#0000;padding:10px}@media (prefers-color-scheme:light){button.ghost{color:#d9523f}}button.ghost:active{background-color:var(--surface-color-light)}.text-center{text-align:center}.w-full{width:100%}.flex{display:flex}.flex-col{flex-direction:column;display:flex}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.gap-2{gap:var(--spacing-2)}.gap-4{gap:var(--spacing-4)}.gap-6{gap:var(--spacing-6)}.p-4{padding:var(--spacing-4)}.p-6{padding:var(--spacing-6)}.mt-4{margin-top:var(--spacing-4)}.mb-4{margin-bottom:var(--spacing-4)}.mt-auto{margin-top:auto}.glass-panel{background:var(--surface-color);border-radius:var(--radius-lg);border:1px solid var(--border-color);padding:var(--spacing-4);box-shadow:var(--shadow-sm)}.modal-overlay{z-index:1000;background-color:#00000080;justify-content:center;align-items:flex-end;display:flex;position:fixed;inset:0}.modal-content{background-color:var(--bg-color);width:100%;max-width:480px;padding:var(--spacing-6);border-radius:24px 24px 0 0;padding-bottom:48px;box-shadow:0 -10px 40px #0000004d}.slide-up{animation:.3s cubic-bezier(.16,1,.3,1) slideUp}@keyframes slideUp{0%{opacity:0;transform:translateY(100px)}to{opacity:1;transform:translateY(0)}}@keyframes tonePulse{0%{box-shadow:0 0 #ef476f73}70%{box-shadow:0 0 0 16px #ef476f00}to{box-shadow:0 0 #ef476f00}}@keyframes tonePing{0%{opacity:.55;transform:scale(1)}to{opacity:0;transform:scale(1.7)}}.tappable-word{cursor:pointer;border-bottom:1px dotted var(--text-muted);-webkit-tap-highlight-color:transparent;border-radius:2px;padding-bottom:1px;transition:background-color .15s}.tappable-word:active{background-color:color-mix(in srgb, var(--primary-color) 18%, transparent)}.tappable-word--selected{background-color:color-mix(in srgb, var(--primary-color) 22%, transparent);border-bottom-color:var(--primary-color);border-bottom-style:solid}@font-face{font-family:Finesse;src:url(/fonts/Finesse-Roman.otf)format("opentype");font-weight:400;font-display:swap}:root[data-theme=tap-chi]{--tc-pink:#ee4a75;--tc-pink-dk:#c5305a;--tc-navy:#204081;--tc-navy-dk:#142c5c;--tc-teal:#38ba94;--tc-yellow:#fcbd1b;--tc-yellow-dk:#cc9610;--tc-plum:#7d3c6a;--tc-terracotta:#c8572b;--tc-cream:#faf8f3;--tc-ink:#1b1a3a;--tc-paper-line:#e7d9bb;--tc-finesse:"Finesse", "Be Vietnam Pro", Georgia, serif;--font-sans:"Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--primary-color:var(--tc-pink);--primary-color-hover:var(--tc-pink-dk);--secondary-color:var(--tc-navy);--success-color:var(--tc-teal);--danger-color:var(--tc-pink-dk);--bg-color:var(--tc-cream);--surface-color:#faf8f3;--surface-color-light:#fffdf8;--text-main:var(--tc-ink);--text-muted:#9a8f74;--border-color:var(--tc-paper-line);--shadow-sm:0 1px 2px #1b1a3a1f;--shadow-md:0 4px 10px #1b1a3a24;--shadow-lg:0 12px 24px #1b1a3a29;--lesson-selected-border:var(--tc-navy);--lesson-selected-fill:#2040811f;--lesson-correct-fill:#38ba9424;--lesson-error-border:var(--tc-pink);--lesson-error-fill:#ee4a751f;--interstitial-bg:var(--tc-navy);--interstitial-text:#fff;--interstitial-border:#ffffff24;--cta-edge:var(--tc-pink-dk)}:root[data-theme=tap-chi] .word-heading-card{background:var(--tc-navy);color:#fff;box-shadow:0 14px 0 -4px var(--tc-navy-dk);border:none;border-radius:20px;padding:20px 22px 18px;position:relative;overflow:hidden}:root[data-theme=tap-chi] .word-heading-card:before{content:"";z-index:0;opacity:.14;pointer-events:none;background-image:radial-gradient(#fff 1.3px,#0000 1.5px);background-size:12px 12px;position:absolute;inset:0}:root[data-theme=tap-chi] .word-heading-row,:root[data-theme=tap-chi] .word-metrics{z-index:1;position:relative}:root[data-theme=tap-chi] .word-heading{font-family:var(--tc-finesse);color:var(--tc-cream);font-size:clamp(52px,17vw,84px);font-weight:400;line-height:.92}:root[data-theme=tap-chi] .speak-btn{background:var(--tc-yellow);color:var(--tc-ink);box-shadow:0 4px 0 var(--tc-yellow-dk);padding:9px}:root[data-theme=tap-chi] .speak-btn:hover{background:var(--tc-yellow);color:var(--tc-ink)}:root[data-theme=tap-chi] .speak-btn:active{box-shadow:0 2px 0 var(--tc-yellow-dk);transform:translateY(2px)}:root[data-theme=tap-chi] .dict-save-btn{color:#ffffffd9}:root[data-theme=tap-chi] .dict-save-btn:hover,:root[data-theme=tap-chi] .dict-save-btn.saved{color:var(--tc-yellow)}:root[data-theme=tap-chi] .ipa-badge{font-family:var(--tc-finesse);color:var(--tc-cream);background:#ffffff29;font-size:16px}:root[data-theme=tap-chi] .source-name{color:var(--tc-pink);letter-spacing:.14em}:root[data-theme=tap-chi] .part-of-speech{color:var(--tc-teal);background:color-mix(in srgb, var(--tc-teal) 14%, transparent)}:root[data-theme=tap-chi] .meaning-text,:root[data-theme=tap-chi] .example-vi,:root[data-theme=tap-chi] .meaning-text strong,:root[data-theme=tap-chi] .example-vi b{font-family:var(--font-sans)}:root[data-theme=tap-chi] .examples-list{border-left:4px solid var(--tc-teal)}:root[data-theme=tap-chi] .example-item{background:0 0;padding:4px 0}:root[data-theme=tap-chi] .dictionary-container{--primary-color:var(--tc-navy);--primary-color-hover:var(--tc-navy-dk)}:root[data-theme=tap-chi] .dictionary-container .toggle-btn.active,:root[data-theme=tap-chi] .dictionary-container .lang-toggle-label.active,:root[data-theme=tap-chi] .dictionary-container .search-button{color:#fff}:root[data-theme=tap-chi] .dictionary-container .search-actions-group{background-color:color-mix(in srgb, var(--tc-navy) 14%, transparent)}:root[data-theme=tap-chi] .dictionary-container .mode-btn,:root[data-theme=tap-chi] .nav-item[data-tab=dictionary].active{color:var(--tc-navy)}:root[data-theme=tap-chi] .lib-grid-card,:root[data-theme=tap-chi] .lib-content-card,:root[data-theme=tap-chi] .rlib-article-card{box-shadow:0 4px 0 color-mix(in srgb, var(--tc-ink) 9%, transparent)}:root[data-theme=tap-chi] .rlib-article-title,:root[data-theme=tap-chi] .rlib-reader-title{font-family:var(--tc-finesse);font-size:18px;font-weight:400}:root[data-theme=tap-chi] .vocab-deck-icon.saved,:root[data-theme=tap-chi] .vq-option.correct,:root[data-theme=tap-chi] .vq-action-btn.success{--success-color:var(--tc-teal)}:root[data-theme=tap-chi] .vocab-deck-icon.saved{background:color-mix(in srgb, var(--tc-teal) 15%, transparent);color:var(--tc-teal)}:root[data-theme=tap-chi] .vq-option.correct{border-color:var(--tc-teal);background:color-mix(in srgb, var(--tc-teal) 15%, transparent)}:root[data-theme=tap-chi] .vq-action-btn.success{background:var(--tc-teal)}:root[data-theme=tap-chi] .vocab-study-chip.quiz{background:color-mix(in srgb, var(--tc-plum) 15%, transparent);color:var(--tc-plum)}:root[data-theme=tap-chi] .vocab-deck-delete:hover{color:var(--tc-pink-dk);background:color-mix(in srgb, var(--tc-pink-dk) 10%, transparent)}:root[data-theme=tap-chi] .feedback-reporter{background:var(--tc-pink);color:#fff;box-shadow:0 5px 0 var(--tc-pink-dk), 0 8px 18px #1b1a3a2e;border:none}:root[data-theme=tap-chi] .feedback-reporter:active{box-shadow:0 3px 0 var(--tc-pink-dk), 0 5px 12px #1b1a3a2e;transform:translateY(2px)scale(.98)}.app-container{flex-direction:column;width:100%;height:100%;display:flex;position:relative;overflow:hidden}.app-loading-screen{width:100%;height:100%;min-height:var(--app-viewport-height);padding:var(--app-edge-top) var(--app-edge-right) var(--app-edge-bottom) var(--app-edge-left);background:radial-gradient(circle at 50% 45%, #f26b5a24 0 18%, transparent 42%), var(--bg-color);color:var(--text-main);text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:18px;display:flex}.app-loading-mascot{place-items:center;width:120px;height:120px;display:grid;position:relative}.app-loading-star{transform-origin:bottom;filter:drop-shadow(0 10px 16px #00000047);animation:1.45s ease-in-out infinite app-loading-bob;display:block;overflow:visible}.app-loading-spark{background:var(--accent-gold);opacity:0;border-radius:3px;width:10px;height:10px;animation:1.45s ease-in-out infinite app-loading-spark;position:absolute;transform:rotate(45deg)scale(.65)}.app-loading-spark-one{top:14px;right:18px}.app-loading-spark-two{width:7px;height:7px;animation-delay:.18s;top:42px;left:12px}.app-loading-spark-three{width:6px;height:6px;animation-delay:.34s;bottom:28px;right:20px}.app-loading-text{color:var(--text-muted);letter-spacing:0;font-size:14px;font-weight:800}@keyframes app-loading-bob{0%,to{transform:translateY(0)rotate(-2deg)scale(1)}45%{transform:translateY(-10px)rotate(2deg)scale(1.04)}}@keyframes app-loading-spark{0%,to{opacity:0;transform:rotate(45deg)scale(.45)}42%{opacity:1;transform:rotate(45deg)scale(1)}}@media (prefers-reduced-motion:reduce){.app-loading-star,.app-loading-spark{animation:none}.app-loading-spark{opacity:.8}}.content-column{flex-direction:column;flex:1;min-height:0;display:flex;overflow:hidden}.main-content{-ms-overflow-style:none;scrollbar-width:none;flex:1;animation:.2s ease-out tabFadeIn;position:relative;overflow-y:auto}.main-content.no-topbar{padding-top:var(--safe-area-top)}@keyframes tabFadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.main-content::-webkit-scrollbar{display:none}.hide-scrollbar{scrollbar-width:none;-ms-overflow-style:none}.hide-scrollbar::-webkit-scrollbar{display:none}.roadmap-continue-wrapper{z-index:100;pointer-events:none;justify-content:center;margin-top:-80px;padding:0 24px;display:flex;position:sticky;bottom:24px;left:0;right:0}.roadmap-continue-wrapper>*{pointer-events:auto}.roadmap-bottom-spacer{height:calc(112px + var(--safe-area-bottom-effective))}.path-container{padding:var(--spacing-6) 0 120px;flex-direction:column;align-items:center;display:flex}.path-node{width:70px;height:70px;margin:var(--spacing-4) 0;z-index:2;cursor:pointer;border-radius:50%;justify-content:center;align-items:center;transition:transform .2s,box-shadow .2s;display:flex;position:relative}.path-node.active{background-color:var(--primary-color);color:#1a1a1a;box-shadow:0 6px 0 #b03e2d, 0 0 0 4px var(--bg-color), 0 0 0 8px var(--primary-color);border:4px solid #b03e2d}.path-node.active:active{box-shadow:0 2px 0 #b03e2d, 0 0 0 4px var(--bg-color), 0 0 0 8px var(--primary-color);transform:translateY(4px)scale(.95)}.path-node.completed{background-color:var(--primary-color);color:#1a1a1a;border:4px solid #b03e2d;box-shadow:0 6px #b03e2d}.path-node.completed:active{transform:translateY(4px)scale(.95);box-shadow:0 2px #b03e2d}.path-node.locked{background-color:var(--surface-color-light);border:4px solid var(--border-color);color:var(--text-muted);box-shadow:0 6px 0 var(--border-color)}.path-node.locked:active{box-shadow:0 2px 0 var(--border-color);transform:translateY(4px)scale(.95)}.path-node.skill-node.active{box-shadow:0 6px 0 #7c3aed, 0 0 0 4px var(--bg-color), 0 0 0 8px #a78bfa;background-color:#a78bfa;border-color:#7c3aed}.path-node.skill-node.active:active{box-shadow:0 2px 0 #7c3aed, 0 0 0 4px var(--bg-color), 0 0 0 8px #a78bfa}.path-node.skill-node.completed{background-color:#a78bfa;border-color:#7c3aed;box-shadow:0 6px #7c3aed}.path-node.skill-node.completed:active{box-shadow:0 2px #7c3aed}.path-node.test-node.active{box-shadow:0 6px 0 #c2410c, 0 0 0 4px var(--bg-color), 0 0 0 8px #f97316;background-color:#f97316;border-color:#c2410c}.path-node.test-node.active:active{box-shadow:0 2px 0 #c2410c, 0 0 0 4px var(--bg-color), 0 0 0 8px #f97316}.path-node.test-node.completed{background-color:#f97316;border-color:#c2410c;box-shadow:0 6px #c2410c}.path-node.test-node.completed:active{box-shadow:0 2px #c2410c}.path-node-icon{width:32px;height:32px}.practice-grid{gap:var(--spacing-4);padding:var(--spacing-4);grid-template-columns:repeat(2,1fr);display:grid}.practice-card{background-color:var(--surface-color);border:2px solid var(--border-color);border-radius:var(--radius-lg);padding:var(--spacing-4);text-align:center;align-items:center;gap:var(--spacing-2);box-shadow:0 4px 0 var(--border-color);cursor:pointer;flex-direction:column;transition:transform .2s,box-shadow .2s;display:flex}.practice-card:active{box-shadow:0 0 0 var(--border-color);transform:translateY(4px)}.practice-icon{width:48px;height:48px;color:var(--primary-color);margin-bottom:var(--spacing-2)}.sidebar-brand,.sidebar-footer{display:none}.bottom-nav{min-height:var(--bottom-nav-height);background-color:var(--surface-color);border-top:1px solid var(--border-color);padding-left:var(--safe-area-left);padding-right:var(--safe-area-right);padding-bottom:var(--bottom-nav-safe-area-bottom);margin-bottom:var(--bottom-nav-gap);flex-shrink:0;align-items:stretch;display:flex}.nav-item{color:var(--text-muted);box-shadow:none;background:0 0;border:none;border-radius:0;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:3px;min-width:0;padding:8px 0;display:flex}.nav-item:active{box-shadow:none;transform:scale(.95)}.nav-item.active{color:var(--primary-color)}.nav-item span{font-size:10px;font-weight:600;line-height:1}.bottom-nav{z-index:50;position:relative}.dict-popup-menu{background:var(--surface-color);border:1px solid var(--border-color);border-radius:14px;gap:4px;margin-bottom:8px;padding:6px;animation:.15s ease-out popup-in;display:flex;position:absolute;bottom:100%;left:50%;transform:translate(-50%);box-shadow:0 -8px 32px #0000004d}@keyframes popup-in{0%{opacity:0;transform:translate(-50%)translateY(8px)scale(.9)}to{opacity:1;transform:translate(-50%)translateY(0)scale(1)}}.dict-popup-item{color:var(--text-main);cursor:pointer;background:0 0;border:none;border-radius:10px;flex-direction:column;align-items:center;gap:4px;padding:12px 18px;font-family:inherit;font-size:11px;font-weight:600;transition:background .15s;display:flex}.dict-popup-item:active{background:#f26b5a26}.ocr-overlay{z-index:1000;background:#000000b3;justify-content:center;align-items:center;padding:24px;display:flex;position:fixed;inset:0}.ocr-overlay-card{background:var(--surface-color);border-radius:var(--radius-lg);flex-direction:column;align-items:center;gap:16px;min-width:260px;max-width:320px;padding:32px 24px;display:flex;box-shadow:0 16px 48px #0006}.ocr-overlay-text{color:var(--text-main);font-size:15px;font-weight:700}.ocr-progress-bar{background:var(--border-color);border-radius:3px;width:100%;height:6px;overflow:hidden}.ocr-progress-fill{background:var(--primary-color);border-radius:3px;height:100%;transition:width .3s}.ocr-cancel-btn{border:1px solid var(--border-color);color:var(--text-muted);border-radius:var(--radius-md);cursor:pointer;background:0 0;align-items:center;gap:6px;padding:8px 16px;font-family:inherit;font-size:13px;font-weight:600;transition:background .15s;display:flex}.ocr-cancel-btn:hover{background:#ffffff0d}.voice-pulse-ring{background:#f26b5a1a;border-radius:50%;justify-content:center;align-items:center;width:72px;height:72px;animation:1.5s ease-in-out infinite voice-pulse;display:flex}@keyframes voice-pulse{0%,to{box-shadow:0 0 #f26b5a4d}50%{box-shadow:0 0 0 16px #f26b5a00}}.topbar-desktop-only{display:none}.top-bar{padding-bottom:var(--spacing-4);padding-top:calc(var(--safe-area-top) + var(--spacing-4));padding-left:var(--app-edge-left);padding-right:var(--app-edge-right);background-color:var(--surface-color);border-bottom:1px solid var(--border-color);z-index:10;justify-content:space-between;align-items:center;display:flex;position:sticky;top:0}.stat-badge{align-items:center;gap:var(--spacing-1);font-size:14px;font-weight:700;display:flex}.stat-badge.streak{color:#ff9f1c}.stat-badge.gems{color:var(--secondary-color)}.stat-badge.hearts{color:var(--danger-color)}.onboarding-screen{height:100%;padding-top:var(--app-edge-top);padding-right:var(--app-edge-right);padding-bottom:var(--app-edge-bottom);padding-left:var(--app-edge-left);flex-direction:column;animation:.3s ease-out slideIn;display:flex}@keyframes slideIn{0%{opacity:0;transform:translate(20px)}to{opacity:1;transform:translate(0)}}.onboarding-content{flex-direction:column;flex:1;justify-content:center;display:flex}.onboarding-title{text-align:center;margin-bottom:var(--spacing-8);font-size:24px}.option-btn{background-color:var(--surface-color);border:2px solid var(--border-color);color:var(--text-main);box-shadow:0 4px 0 var(--border-color);margin-bottom:var(--spacing-4);justify-content:space-between}.option-btn:active{box-shadow:0 0 0 var(--border-color)}.option-btn.selected{border-color:var(--primary-color);color:var(--primary-color);background-color:#f26b5a1a}.bottom-cta{padding:var(--spacing-4) 0;margin-top:auto}@keyframes settingsPanelIn{0%{opacity:.6;transform:translate(-100%)}to{opacity:1;transform:translate(0)}}@keyframes slideUpSheet{0%{opacity:.8;transform:translateY(100%)}to{opacity:1;transform:translateY(0)}}@media (width>=768px){.app-container{flex-direction:row;height:100dvh}.main-content.no-topbar{padding-top:0}.sidebar-brand{border-bottom:1px solid var(--border-color);align-items:center;gap:10px;margin-bottom:8px;padding:4px 16px 20px;display:flex}.sidebar-brand-icon{border-radius:8px;width:36px;height:36px}.sidebar-brand-name{color:var(--primary-color);font-size:18px;font-weight:800}.bottom-nav{border-top:none;border-right:1px solid var(--border-color);flex-direction:column;flex-shrink:0;order:-1;align-items:stretch;gap:4px;width:220px;min-height:100%;margin-bottom:0;padding:20px 8px}.nav-item{border-radius:12px;flex-direction:row;flex:0;justify-content:flex-start;gap:12px;padding:12px 16px;transition:background .15s}.nav-item:hover{background:var(--surface-color-light)}.nav-item:active{transform:none}.nav-item.active{background:#f26b5a1a}.nav-item span{font-size:14px;font-weight:600}.nav-item svg{flex-shrink:0}.main-content{width:100%;max-width:720px;margin:0 auto;padding:0 24px}.top-bar{display:none}.topbar-desktop-only{display:block}.study-tab-container .topbar-desktop-only{display:none!important}.sidebar-footer{border-top:1px solid var(--border-color);flex-direction:column;gap:4px;margin-top:auto;padding-top:12px;display:flex}.sidebar-profile{cursor:pointer;border-radius:12px;align-items:center;gap:10px;margin-top:4px;padding:12px 16px;transition:background .15s;display:flex}.sidebar-profile:hover{background:var(--surface-color-light)}.sidebar-avatar{background:var(--primary-color);color:#1a1a1a;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:34px;height:34px;display:flex}.sidebar-profile-info{flex-direction:column;min-width:0;display:flex}.sidebar-profile-name{color:var(--text-main);white-space:nowrap;text-overflow:ellipsis;font-size:14px;font-weight:700;overflow:hidden}.sidebar-profile-sub{color:var(--text-muted);font-size:11px}.sidebar-notif-badge{background:var(--danger-color);color:#fff;border-radius:10px;margin-left:auto;padding:1px 6px;font-size:11px;font-weight:700}.practice-grid{grid-template-columns:repeat(3,1fr)}.path-container{padding-bottom:60px}.roadmap-bottom-spacer{height:56px}.dict-popup-menu{margin-top:8px;margin-bottom:0;top:100%;bottom:auto;left:100%;transform:translate(-50%)}}.shell-switcher{justify-content:center;padding:8px 12px}.shell-switcher--mobile{top:calc(var(--safe-area-top) + 6px);z-index:60;padding:0;display:flex;position:fixed;right:8px}.shell-switcher--mobile>div{box-shadow:0 2px 8px #00000026}.shell-switcher--sidebar{display:none}@media (width<=767px){.home-tab-container .top-bar{padding-right:calc(var(--app-edge-right) + 150px)}}@media (width>=768px){.shell-switcher--mobile{display:none}.shell-switcher--sidebar{margin-bottom:4px;padding:0 8px 12px;display:flex}}.notif-stack{z-index:8000;pointer-events:none;flex-direction:column;gap:6px;width:min(100vw - 24px,366px);display:flex;position:fixed;top:58px;left:50%;transform:translate(-50%)}.notif-toast{pointer-events:all;-webkit-backdrop-filter:blur(16px);background-color:var(--surface-color);opacity:0;border:1px solid;border-radius:14px;align-items:center;gap:10px;padding:10px 36px 10px 10px;transition:opacity .28s cubic-bezier(.34,1.4,.64,1),transform .28s cubic-bezier(.34,1.4,.64,1);display:flex;position:relative;overflow:hidden;transform:translateY(-12px)scale(.97);box-shadow:0 4px 20px #00000038,0 1px 4px #00000024}.notif-toast--in{opacity:1;transform:translateY(0)scale(1)}.notif-toast--out{opacity:0;pointer-events:none;transition:opacity .22s,transform .22s;transform:translateY(-8px)scale(.96)}.notif-accent-bar{border-radius:14px 0 0 14px;width:3px;position:absolute;top:0;bottom:0;left:0}.notif-icon-blob{border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;width:36px;min-width:36px;height:36px;display:flex}.notif-content{flex-direction:column;flex:1;gap:1px;min-width:0;display:flex}.notif-title{color:var(--text-main);font-size:13px;font-weight:700;line-height:1.3}.notif-text{color:var(--text-muted);font-size:11.5px;line-height:1.4}.notif-dismiss{color:var(--text-muted);cursor:pointer;background:#ffffff1a;border:none;border-radius:50%;justify-content:center;align-items:center;width:20px;height:20px;padding:0;transition:background .15s;display:flex;position:absolute;top:8px;right:8px}.notif-dismiss:hover{background:#fff3}.notif-panel-backdrop{z-index:8500;background:#00000059;animation:.2s notifBackdropIn;position:fixed;inset:0}@keyframes notifBackdropIn{0%{opacity:0}to{opacity:1}}.notif-panel{background:var(--bg-color);border-left:1px solid var(--border-color);z-index:8600;flex-direction:column;width:min(92vw,360px);display:flex;position:fixed;top:0;bottom:0;right:0;box-shadow:-8px 0 32px #00000038}.notif-panel-header{border-bottom:1px solid var(--border-color);flex-shrink:0;justify-content:space-between;align-items:center;padding:16px 16px 12px;display:flex}.notif-panel-title{color:var(--text-main);font-size:16px;font-weight:800}.notif-panel-action-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:8px;align-items:center;padding:6px;transition:background .15s,color .15s;display:flex}.notif-panel-action-btn:hover{background:var(--surface-color);color:var(--text-main)}.notif-panel-tabs{border-bottom:1px solid var(--border-color);flex-shrink:0;gap:0;padding:8px 16px;display:flex}.notif-panel-tab{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-bottom:2px solid #0000;flex:1;padding:8px 0;font-family:inherit;font-size:13px;font-weight:700;transition:color .15s,border-color .15s}.notif-panel-tab.active{color:var(--text-main);border-bottom-color:var(--primary-color)}.notif-panel-body{-webkit-overflow-scrolling:touch;flex:1;padding:8px 0;overflow-y:auto}.notif-panel-empty{text-align:center;color:var(--text-muted);flex-direction:column;justify-content:center;align-items:center;gap:8px;padding:64px 24px;display:flex}.notif-panel-empty p{color:var(--text-muted);margin:0;font-size:15px;font-weight:700}.notif-panel-empty span{color:var(--text-muted);opacity:.7;font-size:13px}.notif-panel-item{border-bottom:1px solid var(--border-color);align-items:flex-start;gap:10px;padding:12px 16px;transition:background .15s;display:flex;position:relative}.notif-panel-item:last-child{border-bottom:none}.notif-panel-item:hover{background:var(--surface-color)}.notif-panel-item-icon{border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;width:34px;min-width:34px;height:34px;margin-top:1px;display:flex}.notif-panel-item-avatar{background:var(--primary-color);color:#1a1a1a;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:34px;min-width:34px;height:34px;margin-top:1px;font-size:14px;font-weight:800;display:flex}.notif-panel-item-content{flex-direction:column;flex:1;gap:2px;min-width:0;display:flex}.notif-panel-item-title{color:var(--text-main);font-size:13px;font-weight:700;line-height:1.3}.notif-panel-item-body{color:var(--text-muted);font-size:12px;line-height:1.4}.notif-panel-item-time{color:var(--text-muted);opacity:.65;margin-top:2px;font-size:11px}.notif-friend-name{color:var(--text-main);font-weight:800}.notif-panel-item-accent{opacity:.6;border-radius:0;width:2px;position:absolute;top:0;bottom:0;left:0}.notif-panel-item-icon-sm{opacity:.5;flex-shrink:0;margin-top:2px}.notif-bell-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:8px;justify-content:center;align-items:center;padding:6px;transition:background .15s,color .15s;display:flex;position:relative}.notif-bell-btn:hover{background:var(--surface-color);color:var(--text-main)}.notif-bell-badge{color:#fff;border:1.5px solid var(--bg-color);background:#ef4444;border-radius:8px;justify-content:center;align-items:center;min-width:16px;height:16px;padding:0 3px;font-family:inherit;font-size:10px;font-weight:800;line-height:1;animation:.3s cubic-bezier(.34,1.56,.64,1) badgePop;display:flex;position:absolute;top:2px;right:2px}@keyframes badgePop{0%{transform:scale(0)}to{transform:scale(1)}}.referral-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:2000;background-color:#0009;justify-content:center;align-items:center;display:flex}.referral-modal{border-radius:var(--radius-lg);background:var(--bg-color);-ms-overflow-style:none;scrollbar-width:none;width:90%;max-width:500px;max-height:90vh;padding:0;position:relative;overflow:hidden auto;box-shadow:0 10px 40px #0006}.referral-modal::-webkit-scrollbar{display:none}.referral-close{z-index:10;border-radius:50%;padding:8px;position:absolute;top:16px;right:16px;color:#fff!important;background:#0003!important}.referral-close:hover{background:#0006!important}.referral-header{background:linear-gradient(135deg, var(--primary-color), var(--primary-color-hover));text-align:center;color:#1a1a1a;border-radius:var(--radius-lg) var(--radius-lg) 0 0;padding:40px 24px 24px}.referral-hero-icon{background:#fff;border-radius:50%;justify-content:center;align-items:center;width:80px;height:80px;margin:0 auto 16px;display:flex;box-shadow:0 8px 16px #0000001a}.referral-headline{margin:0 0 12px;font-size:24px;font-weight:900;line-height:1.2}.referral-subhead{opacity:.9;margin:0;font-size:15px;line-height:1.4}.referral-link-section{padding:24px 24px 16px}.section-label{text-transform:uppercase;color:var(--text-muted);letter-spacing:.5px;margin:0 0 8px;font-size:12px;font-weight:800}.link-box{background:var(--surface-color);border:2px solid var(--border-color);border-radius:var(--radius-lg);align-items:center;padding:6px;display:flex;box-shadow:inset 0 2px 4px #0000001a}.link-text{color:var(--text-main);white-space:nowrap;text-overflow:ellipsis;flex:1;padding:0 12px;font-family:monospace;font-size:16px;font-weight:700;overflow:hidden}.copy-btn{border-radius:var(--radius-md);background:var(--primary-color);color:#1a1a1a;padding:10px 16px;font-size:13px;box-shadow:0 3px #b03e2d}.copy-btn.copied{background:var(--success-color);color:#fff;box-shadow:0 3px #05a67d}.share-methods{gap:12px;padding:0 24px 24px;display:flex}.share-method-btn{box-shadow:none;background:0 0;border:none;flex-direction:column;flex:1;align-items:center;gap:8px;padding:0;display:flex}.share-method-btn:active{box-shadow:none;transform:scale(.95)}.share-icon-wrapper{border-radius:16px;justify-content:center;align-items:center;width:56px;height:56px;display:flex;box-shadow:0 4px 10px #00000026}.share-label{color:var(--text-main);font-size:12px;font-weight:700}.milestone-tracker{background:var(--surface-color);border-top:1px solid var(--border-color);padding:24px}.milestone-title{margin:0 0 16px;font-size:16px;font-weight:800}.milestone-progress-bar{background:var(--bg-color);border:1px solid var(--border-color);border-radius:6px;height:12px;margin-bottom:24px;position:relative;overflow:hidden}.milestone-progress-fill{background:var(--primary-color);border-radius:6px;height:100%;transition:width .5s}.milestone-nodes{flex-direction:column;gap:12px;display:flex}.milestone-node{border-radius:var(--radius-md);background:var(--bg-color);border:1px solid var(--border-color);opacity:.6;align-items:center;gap:12px;padding:12px;transition:all .3s;display:flex}.milestone-node.reached{opacity:1;border-color:var(--active-color);background:#ffffff0d}.milestone-icon{background:var(--surface-color);width:40px;height:40px;color:var(--text-muted);border-radius:50%;justify-content:center;align-items:center;display:flex}.milestone-node.reached .milestone-icon{background:var(--active-color);color:#fff}.milestone-node.reached[style*=\#FFD166] .milestone-icon{color:#1a1a1a}.milestone-info{flex-direction:column;justify-content:center;display:flex}.milestone-count{color:var(--text-muted);text-transform:uppercase;font-size:12px;font-weight:800}.milestone-reward{color:var(--text-main);font-size:15px;font-weight:700}.milestone-node.reached .milestone-reward{color:var(--active-color)}.partner-banner{border-radius:var(--radius-lg);cursor:pointer;background:linear-gradient(135deg,#ce82ff1a,#ce82ff33);border:2px solid #ce82ff4d;align-items:center;gap:16px;margin:0 24px 24px;padding:16px;transition:all .2s;display:flex}.partner-banner:hover{background:linear-gradient(135deg,#ce82ff26,#ce82ff40);border-color:#ce82ff;transform:translateY(-2px);box-shadow:0 4px 12px #ce82ff26}.partner-banner-icon{background:#ce82ff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:44px;height:44px;display:flex}.partner-banner-text{flex-direction:column;display:flex}.partner-banner-title{color:var(--text-main);margin-bottom:2px;font-size:16px;font-weight:800}.partner-banner-subtitle{color:var(--text-muted);font-size:13px;font-weight:600}.partner-banner-subtitle .arrow{color:#ce82ff;margin-left:4px;font-weight:800;transition:transform .2s;display:inline-block}.partner-banner:hover .arrow{transform:translate(3px)}.install-prompt-overlay{z-index:10000;background:#00000080;justify-content:center;align-items:flex-end;padding:16px;animation:.3s fadeIn;display:flex;position:fixed;inset:0}.install-prompt{background:var(--surface-color,#1e1e1e);border-radius:16px;width:100%;max-width:400px;padding:20px;animation:.3s slideUp;position:relative}.install-prompt-close{color:var(--text-secondary,#999);cursor:pointer;background:0 0;border:none;justify-content:center;align-items:center;padding:4px;display:flex;position:absolute;top:12px;right:12px}.install-prompt-header{align-items:center;gap:14px;margin-bottom:16px;padding-right:24px;display:flex}.install-prompt-icon{border-radius:12px;width:52px;height:52px}.install-prompt-header h3{color:var(--text-primary,#fff);margin:0 0 4px;font-size:17px}.install-prompt-header p{color:var(--text-secondary,#999);margin:0;font-size:13px;line-height:1.3}.install-prompt-steps{flex-direction:column;gap:12px;display:flex}.install-step{background:var(--surface-color-light,#2c2c2c);color:var(--text-primary,#fff);border-radius:10px;align-items:center;gap:12px;padding:10px 12px;font-size:14px;display:flex}.install-step svg{color:var(--primary-color,#ffb703);flex-shrink:0}.install-note{color:var(--text-secondary,#999);text-align:center;margin:0;padding:8px 0;font-size:14px}.install-btn{background:var(--primary-color,#ffb703);color:#000;cursor:pointer;border:none;border-radius:12px;justify-content:center;align-items:center;gap:8px;width:100%;padding:14px;font-size:16px;font-weight:600;display:flex}.install-btn:active{opacity:.9}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.feedback-reporter{z-index:850;box-sizing:border-box;background:color-mix(in srgb, var(--surface-color-light) 88%, var(--primary-color));width:44px;height:44px;color:var(--text-main);cursor:pointer;touch-action:none;-webkit-user-select:none;user-select:none;appearance:none;border:1px solid #ffffff29;border-radius:50%;place-items:center;padding:0;line-height:0;transition:left .18s,top .18s,transform .12s,box-shadow .12s;display:grid;position:fixed;box-shadow:0 10px 26px #00000052}.feedback-reporter:active{transform:translateY(1px)scale(.97)}.feedback-reporter-dragging{cursor:grabbing;transition:transform .12s,box-shadow .12s;box-shadow:0 14px 34px #0000006b}.feedback-reporter svg,.feedback-icon-button svg{flex:none;display:block}.feedback-modal-shell{inset:var(--app-viewport-offset-top) 0 0 var(--app-viewport-offset-left);width:var(--app-viewport-width);height:var(--app-viewport-height);z-index:1300;color:var(--text-main);place-items:end center;display:grid;position:fixed}.feedback-modal-backdrop{background:#00000094;position:absolute;inset:0}.feedback-modal{width:min(100%,520px);max-height:calc(var(--app-viewport-height) - var(--app-edge-top) - 10px);padding:16px;padding-bottom:calc(16px + var(--safe-area-bottom-effective));border:1px solid var(--border-color);background:var(--surface-color);border-radius:18px 18px 0 0;flex-direction:column;gap:14px;display:flex;position:relative;overflow-y:auto;box-shadow:0 -14px 40px #0006}.feedback-modal-header,.feedback-actions{justify-content:space-between;align-items:center;gap:12px;display:flex}.feedback-modal-header>div{flex:auto;min-width:0}.feedback-modal-header h2{margin:0;font-size:20px;line-height:1.2}.feedback-modal-header p{color:var(--text-muted);overflow-wrap:anywhere;margin:4px 0 0;font-size:13px}.feedback-icon-button{box-sizing:border-box;border:1px solid var(--border-color);background:var(--surface-color-light);width:38px;height:38px;color:var(--text-main);cursor:pointer;appearance:none;border-radius:50%;flex:none;place-items:center;padding:0;line-height:0;display:grid}.feedback-field{flex-direction:column;gap:8px;display:flex}.feedback-field span{font-size:14px;font-weight:800}.feedback-field textarea{resize:vertical;box-sizing:border-box;border:1px solid var(--border-color);background:var(--bg-color);width:100%;min-height:118px;max-height:220px;color:var(--text-main);font:inherit;border-radius:10px;outline:none;padding:12px;line-height:1.45}.feedback-field textarea:focus{border-color:var(--primary-color);box-shadow:0 0 0 3px color-mix(in srgb, var(--primary-color) 24%, transparent)}.feedback-message{background:var(--surface-color-light);color:var(--text-main);border-radius:10px;padding:10px 12px;font-size:13px;font-weight:700;line-height:1.35}.feedback-message-error{color:var(--danger-color)}.feedback-message-sent{color:var(--success-color)}.feedback-primary,.feedback-secondary{cursor:pointer;border-radius:10px;justify-content:center;align-items:center;gap:8px;min-height:42px;padding:0 16px;font-size:15px;font-weight:900;display:inline-flex}.feedback-primary{background:var(--primary-color);color:#fff;border:0}.feedback-primary:disabled{opacity:.5;cursor:not-allowed}.feedback-secondary{border:1px solid var(--border-color);color:var(--text-main);background:0 0}.feedback-spin{animation:.8s linear infinite feedback-spin}@keyframes feedback-spin{to{transform:rotate(360deg)}}@media (width>=700px){.feedback-modal-shell{place-items:center}.feedback-modal{border-radius:14px;padding-bottom:16px}}@media (prefers-reduced-motion:reduce){.feedback-spin{animation:none}}
