@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap";:root{--bg-color: #0d0f12;--bg-color-secondary: #161b22;--bg-color-tertiary: #202630;--text-color: #e5e7eb;--text-color-secondary: #9ca3af;--accent-color: #3b82f6;--accent-color-hover: #2563eb;--accent-color-glow: rgba(59, 130, 246, .4);--border-color: #2e3540;--msg-user-bg: #1e293b;--msg-ai-bg: transparent;--sidebar-width: 260px;--font-base: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}.light-theme{--bg-color: #f9fafb;--bg-color-secondary: #ffffff;--bg-color-tertiary: #f3f4f6;--text-color: #111827;--text-color-secondary: #4b5563;--border-color: #e5e7eb;--msg-user-bg: #f3f4f6;--msg-ai-bg: transparent}.light-theme .brand-name{background:linear-gradient(90deg,#111827,#4b5563);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.light-theme .package-card,.light-theme .about-content,.light-theme .auth-box,.light-theme .settings-card{background-color:#fff;box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -1px #0000000f}.light-theme .view-title,.light-theme .package-card h3,.light-theme .pkg-price,.light-theme .markdown-body h1,.light-theme .markdown-body h2,.light-theme .markdown-body h3{color:#111827}.light-theme .markdown-body pre{background-color:#f3f4f6}.light-theme .google-btn{border:1px solid #e5e7eb}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-base);background-color:var(--bg-color);color:var(--text-color);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.6;overscroll-behavior-y:none}#root{display:flex;height:100vh;width:100vw;overflow:hidden}@keyframes slideUpFade{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}@keyframes pulseGlow{0%{box-shadow:0 0 10px var(--accent-color-glow)}50%{box-shadow:0 0 25px var(--accent-color-glow)}to{box-shadow:0 0 10px var(--accent-color-glow)}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}button{background:none;border:none;color:inherit;font:inherit;cursor:pointer}input,textarea{font-family:var(--font-base);background:none;border:none;color:inherit}input:focus,textarea:focus{outline:none}.markdown-body{font-size:.95rem;line-height:1.7}.markdown-body p{margin-bottom:1rem}.markdown-body p:last-child{margin-bottom:0}.markdown-body pre{background-color:#0d1117;padding:1rem;border-radius:8px;overflow-x:auto;border:1px solid var(--border-color);margin-bottom:1rem}.markdown-body code{font-family:SFMono-Regular,Consolas,Liberation Mono,Menlo,Courier,monospace;background-color:#1a1f28;padding:.2rem .4rem;border-radius:4px;font-size:.9em}.markdown-body pre code{background-color:transparent;padding:0}.markdown-body ul,.markdown-body ol{margin-left:1.5rem;margin-bottom:1rem}.markdown-body h1,.markdown-body h2,.markdown-body h3{margin-top:1.5rem;margin-bottom:.75rem;font-weight:600;color:#fff}.app-container{display:flex;width:100vw;height:100vh;background-color:var(--bg-color)}.sidebar{width:var(--sidebar-width);background-color:var(--bg-color-tertiary);display:flex;flex-direction:column;padding:12px;border-right:1px solid var(--border-color);transition:transform .3s ease}.sidebar-header{padding:8px;display:flex;align-items:center;gap:12px;margin-bottom:24px}.brand-name{font-weight:700;font-size:1.2rem;background:linear-gradient(90deg,#fff,#9ca3af);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.new-chat-btn{display:flex;align-items:center;justify-content:space-between;width:100%;padding:12px;background-color:var(--accent-color);border-radius:8px;color:#fff;font-weight:500;transition:background-color .2s,transform .1s}.new-chat-btn:hover{background-color:var(--accent-color-hover)}.new-chat-btn:active{transform:scale(.98)}.chat-history{flex:1;overflow-y:auto;margin-top:16px}.chat-area{flex:1;display:flex;flex-direction:column;position:relative}.chat-header{padding:16px 24px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:center;font-weight:500;color:var(--text-color-secondary)}.messages{flex:1;overflow-y:auto;padding:24px 0;display:flex;flex-direction:column}.message{display:flex;padding:24px;gap:16px;max-width:800px;margin:0 auto;width:100%;animation:slideUpFade .3s ease forwards}.message.user{background-color:var(--msg-user-bg);border-radius:8px}.message.ai{background-color:var(--msg-ai-bg)}.avatar{width:36px;height:36px;border-radius:8px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.avatar.user{background-color:var(--accent-color)}.avatar.ai{background-color:#10b981}.message-content{flex:1;color:var(--text-color)}.input-container{padding:24px;max-width:800px;margin:0 auto;width:100%;position:relative}.input-box{background-color:var(--bg-color-secondary);border:1px solid var(--border-color);border-radius:12px;padding:12px 16px;display:flex;align-items:flex-end;gap:12px;box-shadow:0 4px 6px -1px #0000001a;transition:border-color .2s}.input-box:focus-within{border-color:var(--accent-color)}textarea{flex:1;resize:none;min-height:24px;max-height:200px;padding:0;color:var(--text-color);font-size:1rem}.send-btn{background-color:var(--accent-color);width:32px;height:32px;border-radius:6px;display:flex;align-items:center;justify-content:center;color:#fff;transition:opacity .2s,background-color .2s}.send-btn:hover:not(:disabled){background-color:var(--accent-color-hover)}.send-btn:disabled{opacity:.5;cursor:not-allowed}.welcome-screen{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;text-align:center}.welcome-logo{width:80px;height:80px;background:linear-gradient(135deg,var(--accent-color),#8b5cf6);border-radius:20px;display:flex;align-items:center;justify-content:center;animation:pulseGlow 4s infinite;margin-bottom:24px}.welcome-title{font-size:2rem;font-weight:700}.welcome-subtitle{color:var(--text-color-secondary);font-size:1.1rem;max-width:500px}.sidebar-nav{margin-top:24px;display:flex;flex-direction:column;gap:8px;flex:1}.nav-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:8px;color:var(--text-color-secondary);transition:background-color .2s,color .2s;text-align:left}.nav-item:hover{background-color:var(--border-color);color:var(--text-color)}.nav-item.active{background-color:var(--msg-user-bg);color:var(--text-color);font-weight:500}.sidebar-footer{margin-top:auto;display:flex;flex-direction:column;gap:12px;border-top:1px solid var(--border-color);padding:16px 8px 40px}.lang-switcher-wrapper{display:flex;align-items:center;gap:10px;padding:10px 14px;background-color:var(--bg-color-secondary);border:1px solid var(--border-color);border-radius:10px;color:var(--text-color);transition:border-color .2s;position:relative}.lang-switcher-wrapper:focus-within{border-color:var(--accent-color)}.lang-select{background:none;border:none;color:inherit;font-size:.9rem;font-weight:600;flex:1;outline:none;cursor:pointer;appearance:none;padding-right:20px}.lang-switcher-wrapper:after{content:"";position:absolute;right:14px;top:50%;transform:translateY(-50%);width:10px;height:6px;background-color:var(--text-color-secondary);clip-path:polygon(0 0,100% 0,50% 100%);pointer-events:none}.auth-nav-btn{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:8px;color:var(--text-color);background-color:transparent;border:1px solid var(--border-color);transition:all .2s}.auth-nav-btn:hover{background-color:var(--msg-user-bg)}.page-view{flex:1;overflow-y:auto;padding:48px;max-width:1000px;margin:0 auto;width:100%;animation:slideUpFade .3s ease forwards}.view-title{font-size:2rem;font-weight:700;margin-bottom:32px;color:#fff}.packages-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}.package-card{background-color:var(--bg-color-secondary);border:1px solid var(--border-color);border-radius:16px;padding:40px 24px;text-align:center;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden;display:flex;flex-direction:column;align-items:center}.pricing-toggle-container{display:flex;flex-direction:column;align-items:center;gap:16px;margin-bottom:40px}.pricing-toggle{display:flex;background-color:var(--bg-color-secondary);border:1px solid var(--border-color);padding:4px;border-radius:12px;gap:4px;width:fit-content}.pricing-toggle button{padding:10px 24px;border-radius:8px;font-size:.9375rem;font-weight:600;transition:all .2s;white-space:nowrap;min-width:130px}.pricing-toggle button.active{background-color:var(--accent-color);color:#fff;box-shadow:0 4px 12px var(--accent-color-glow)}.promo-badge{background:linear-gradient(135deg,#10b981,#059669);color:#fff;padding:2px 8px;border-radius:6px;font-size:.7rem;font-weight:700;text-transform:uppercase;margin-left:8px;vertical-align:middle}.package-card:hover{transform:translateY(-4px);box-shadow:0 10px 25px #00000080;border-color:var(--accent-color)}.package-card.recommended{border-color:var(--accent-color);background:linear-gradient(180deg,var(--bg-color-tertiary),var(--bg-color-secondary))}.recommended-badge{position:absolute;top:0;left:50%;transform:translate(-50%);background-color:var(--accent-color);color:#fff;padding:4px 12px;font-size:.75rem;font-weight:700;border-bottom-left-radius:8px;border-bottom-right-radius:8px;letter-spacing:1px}.package-card.premium{border-color:#8b5cf6}.package-card h3{font-size:1.5rem;margin-top:12px;margin-bottom:8px;color:#fff}.pkg-quota{color:var(--text-color-secondary);margin-bottom:24px}.pkg-price-display{display:flex;align-items:baseline;justify-content:center;flex-wrap:wrap;gap:4px;margin-bottom:8px}.pkg-main-price{font-size:2.2rem;font-weight:700;color:#fff;white-space:nowrap}.pkg-price-period{color:var(--text-color-secondary);font-size:.9rem}.total-yearly-label{font-size:.875rem;color:#10b981;margin-bottom:24px;font-weight:500;text-align:center}.pkg-btn{width:100%;padding:12px;border-radius:8px;background-color:var(--msg-user-bg);color:#fff;font-weight:600;transition:background-color .2s;margin-top:auto}.package-card.recommended .pkg-btn{background-color:var(--accent-color)}.package-card.premium .pkg-btn{background-color:#8b5cf6}.about-content{font-size:1.2rem;line-height:1.8;color:var(--text-color-secondary);max-width:800px}.about-content p{margin-bottom:24px}.auth-view{display:flex;align-items:center;justify-content:center}.auth-box{background-color:var(--bg-color-secondary);border:1px solid var(--border-color);border-radius:16px;padding:40px;width:100%;max-width:400px;text-align:center}.auth-box .view-title{font-size:1.5rem;margin-bottom:24px}.auth-form{display:flex;flex-direction:column;gap:16px}.input-group{display:flex;flex-direction:column;text-align:left;gap:6px}.input-group label{font-size:.9rem;color:var(--text-color-secondary)}.input-group input{background-color:var(--bg-color);border:1px solid var(--border-color);border-radius:8px;padding:10px 12px;color:#fff}.input-group input:focus{border-color:var(--accent-color)}.primary-btn{background-color:var(--accent-color);color:#fff;padding:12px;border-radius:8px;font-weight:600;margin-top:8px;transition:background-color .2s}.primary-btn:hover{background-color:var(--accent-color-hover)}.auth-divider{margin:24px 0;position:relative;border-top:1px solid var(--border-color)}.auth-divider span{position:absolute;top:-10px;left:50%;transform:translate(-50%);background-color:var(--bg-color-secondary);padding:0 12px;font-size:.8rem;color:var(--text-color-secondary)}.google-btn{display:flex;align-items:center;justify-content:center;gap:12px;width:100%;padding:12px;background-color:#fff;color:#000;border-radius:8px;font-weight:500;transition:background-color .2s}.google-btn:hover{background-color:#f1f5f9}.auth-switch{margin-top:24px;font-size:.9rem;color:var(--text-color-secondary)}.auth-switch button{color:var(--accent-color);text-decoration:underline;margin-left:8px}.settings-grid{display:flex;flex-direction:column;gap:24px}.settings-card{background-color:var(--bg-color-secondary);border:1px solid var(--border-color);border-radius:16px;padding:32px}.settings-card h3{margin-bottom:24px;font-size:1.25rem;color:#fff}.light-theme .settings-card h3{color:#111827}.settings-item{display:flex;justify-content:space-between;align-items:center;padding:16px 0;border-bottom:1px solid var(--border-color)}.settings-item:last-child{border-bottom:none}.settings-label{display:flex;flex-direction:column;gap:4px}.settings-label span:first-child{font-weight:500;color:var(--text-color)}.settings-label span:last-child{font-size:.875rem;color:var(--text-color-secondary)}.settings-value{font-weight:600;color:var(--accent-color)}.theme-toggle{display:flex;background-color:var(--bg-color-tertiary);padding:4px;border-radius:8px;gap:4px}.theme-toggle button{padding:6px 12px;border-radius:6px;font-size:.875rem;transition:all .2s}.theme-toggle button.active{background-color:var(--accent-color);color:#fff}.cancel-btn{color:#ef4444;font-weight:500;padding:8px 16px;border:1px solid #ef4444;border-radius:8px;transition:all .2s}.cancel-btn:hover{background-color:#ef4444;color:#fff}.mobile-header{display:none;padding:12px 16px;background-color:var(--bg-color-tertiary);border-bottom:1px solid var(--border-color);align-items:center;gap:12px}@media(max-width:768px){.sidebar{position:fixed;top:0;left:0;height:100%;z-index:100;transform:translate(-100%)}.sidebar.open{transform:translate(0)}.mobile-header{display:flex}.app-container{flex-direction:column}.page-view{padding:24px 16px}.message{padding:16px}}.sidebar-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background-color:#00000080;z-index:90}.sidebar-overlay.visible{display:block}@media(max-width:768px){.mobile-close{display:flex!important;background:none;border:none;color:var(--text-color);padding:8px}.sidebar-header{padding-right:8px}}