:root[data-theme=light]{--bg-primary: #f8f9fa;--bg-secondary: #ffffff;--bg-tertiary: #f1f3f5;--bg-sidebar: #f8f9fa;--bg-card: #ffffff;--bg-hover: #f1f3f5;--text-primary: #1a1a1a;--text-secondary: #6c757d;--text-tertiary: #adb5bd;--border-color: #e9ecef;--shadow: rgba(0,0,0,.05);--shadow-lg: rgba(0,0,0,.1);--accent: #84cc16;--accent-hover: #65a30d;--gradient-start: #fef9c3;--gradient-end: #d9f99d;--brand-primary: #10b981;--brand-secondary: #34d399}:root[data-theme=dark]{--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-tertiary: #334155;--bg-sidebar: #1e293b;--bg-card: #1e293b;--bg-hover: #334155;--text-primary: #f8fafc;--text-secondary: #cbd5e1;--text-tertiary: #64748b;--border-color: #334155;--shadow: rgba(0,0,0,.3);--shadow-lg: rgba(0,0,0,.5);--accent: #84cc16;--accent-hover: #a3e635;--gradient-start: #1e293b;--gradient-end: #334155;--brand-primary: #10b981;--brand-secondary: #34d399}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,sans-serif;background:var(--bg-primary);color:var(--text-primary);transition:background .3s ease,color .3s ease;overflow-x:hidden;font-variant-numeric:tabular-nums}.animated-bg{position:fixed;top:0;left:0;width:100%;height:100%;z-index:0;overflow:hidden;pointer-events:none}.gradient-orb{position:absolute;border-radius:50%;filter:blur(80px);opacity:.4;animation:float 20s infinite ease-in-out}.orb-1{width:500px;height:500px;background:linear-gradient(135deg,#10b981,#34d399);top:-10%;left:-10%;animation-delay:0s}.orb-2{width:400px;height:400px;background:linear-gradient(135deg,#84cc16,#a3e635);bottom:-10%;right:-10%;animation-delay:5s}.orb-3{width:300px;height:300px;background:linear-gradient(135deg,#06b6d4,#22d3ee);top:40%;right:10%;animation-delay:10s}@keyframes float{0%,to{transform:translate(0) scale(1)}33%{transform:translate(30px,-30px) scale(1.1)}66%{transform:translate(-20px,20px) scale(.9)}}.container{position:relative;z-index:1;max-width:1400px;margin:0 auto;padding:0 20px}header{background:var(--bg-secondary);border-bottom:1px solid var(--border-color);position:sticky;top:0;z-index:100;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:0 1px 3px var(--shadow)}.header-inner{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;max-width:1600px;margin:0 auto}.logo-section{display:flex;align-items:center;gap:16px}.logo{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--text-primary);font-weight:600;font-size:20px}.logo-icon{width:40px;height:40px;transition:transform .3s ease}.logo:hover .logo-icon{transform:rotate(90deg)}nav{display:flex;gap:8px}.nav-link{padding:10px 20px;border-radius:8px;text-decoration:none;color:var(--text-secondary);font-size:15px;font-weight:500;transition:all .2s ease;cursor:pointer;background:var(--bg-tertiary)}.nav-link:hover,.nav-link.active{background:var(--bg-hover);color:var(--text-primary);transform:translateY(-1px)}.header-actions{display:flex;align-items:center;gap:12px}.icon-btn{width:40px;height:40px;border-radius:50%;border:none;background:var(--bg-tertiary);color:var(--text-primary);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease}.icon-btn:hover{background:var(--bg-hover);transform:translateY(-2px)}.lang-selector{padding:8px 16px;border-radius:8px;border:1px solid var(--border-color);background:var(--bg-tertiary);color:var(--text-primary);cursor:pointer;font-size:14px;font-weight:500;transition:all .2s ease}.lang-selector:hover{border-color:var(--accent)}.avatar{width:40px;height:40px;border-radius:50%;cursor:pointer;transition:transform .2s ease}.avatar:hover{transform:scale(1.1)}.hamburger{display:none;flex-direction:column;gap:4px;background:none;border:none;cursor:pointer;padding:8px}.hamburger span{width:24px;height:2px;background:var(--text-primary);border-radius:2px;transition:all .3s ease}.hamburger.active span:nth-child(1){transform:rotate(45deg) translate(6px,6px)}.hamburger.active span:nth-child(2){opacity:0}.hamburger.active span:nth-child(3){transform:rotate(-45deg) translate(6px,-6px)}.main-layout{display:flex;background:var(--bg-primary);width:100%;max-width:1600px;margin:0 auto;height:calc(100vh - 73px);overflow:hidden}.main-layout>*{min-width:0}.main-content{height:100%}@media(min-width:769px){.sidebar{transform:none!important;position:static!important;height:100%}}@media(max-width:768px){.main-layout{height:auto;overflow:visible}.sidebar{background:var(--bg-secondary, #fff);border-right:1px solid var(--border-color);box-shadow:0 12px 40px #0000002e;visibility:hidden;transition:transform .3s ease,visibility 0s linear .3s}.sidebar.active{visibility:visible;transition:transform .3s ease}}.sidebar{width:280px;background:var(--bg-sidebar);border-right:1px solid var(--border-color);padding:24px 16px;overflow-y:auto;transition:transform .3s ease}.new-chat-btn{width:100%;padding:12px 16px;border-radius:10px;border:1px solid var(--border-color);background:var(--bg-secondary);color:var(--text-primary);font-size:15px;font-weight:500;cursor:pointer;display:flex;align-items:center;gap:10px;transition:all .2s ease;margin-bottom:24px}.new-chat-btn:hover{border-color:var(--accent);transform:translateY(-1px);box-shadow:0 4px 12px var(--shadow)}.sidebar-section{margin-bottom:32px}.sidebar-section-title{font-size:12px;font-weight:600;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:12px;padding:0 12px}.sidebar-menu{list-style:none}.sidebar-menu-item{padding:10px 12px;border-radius:8px;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;gap:12px;color:var(--text-secondary);font-size:15px;margin-bottom:4px;position:relative}.sidebar-menu-item:hover,.sidebar-menu-item.active{background:var(--bg-hover);color:var(--text-primary)}.sidebar-menu-item .badge{margin-left:auto;padding:2px 8px;border-radius:4px;background:var(--accent);color:#000;font-size:11px;font-weight:600}.submenu{margin-left:28px;margin-top:8px;list-style:none}.submenu-item{border-radius:6px;cursor:pointer;transition:all .2s ease;color:var(--text-tertiary);font-size:14px;margin-bottom:2px;border-left:2px solid transparent;padding:8px 12px}.submenu-item:hover,.submenu-item.active{background:var(--bg-hover);color:var(--text-primary);border-left-color:var(--accent)}.user-profile{position:absolute;bottom:0;left:0;right:0;padding:16px;border-top:1px solid var(--border-color);background:var(--bg-sidebar);display:flex;align-items:center;gap:12px;cursor:pointer;transition:background .2s ease}.user-profile:hover{background:var(--bg-hover)}.user-avatar{width:36px;height:36px;border-radius:50%}.user-info{flex:1}.user-name{font-size:14px;font-weight:600;color:var(--text-primary)}.user-email{font-size:12px;color:var(--text-tertiary)}.main-content{flex:1;background:var(--bg-primary);overflow-y:auto;position:relative}.content-header{padding:24px 32px;border-bottom:1px solid var(--border-color);background:var(--bg-secondary);display:flex;align-items:center;justify-content:space-between}.version-selector{padding:10px 16px;border-radius:8px;border:1px solid var(--border-color);background:var(--bg-tertiary);color:var(--text-primary);cursor:pointer;font-size:14px;font-weight:500;display:flex;align-items:center;gap:8px}.upgrade-banner{background:linear-gradient(135deg,var(--gradient-start),var(--gradient-end));padding:12px 20px;border-radius:12px;display:flex;align-items:center;gap:10px;font-size:14px;font-weight:600;color:#000;cursor:pointer;transition:all .2s ease}.upgrade-banner:hover{transform:translateY(-2px);box-shadow:0 8px 20px var(--shadow-lg)}.hero-section{padding:80px 32px;text-align:center;max-width:900px;margin:0 auto}.logo-circle{width:120px;height:120px;margin:0 auto 32px;animation:pulse 3s ease-in-out infinite}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}.hero-title{font-size:48px;font-weight:700;margin-bottom:20px;background:linear-gradient(135deg,var(--brand-primary),var(--brand-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-subtitle{font-size:18px;color:var(--text-secondary);line-height:1.6;margin-bottom:16px}.feature-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;padding:32px;max-width:1200px;margin:0 auto}.feature-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:16px;padding:28px;cursor:pointer;transition:all .3s ease;position:relative;overflow:hidden}.feature-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--brand-primary),var(--brand-secondary));transform:scaleX(0);transition:transform .3s ease}.feature-card:hover:before{transform:scaleX(1)}.feature-card:hover{transform:translateY(-8px);box-shadow:0 12px 40px var(--shadow-lg);border-color:var(--brand-primary)}.feature-icon{width:48px;height:48px;background:var(--bg-tertiary);border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:20px}.feature-title{font-size:20px;font-weight:600;margin-bottom:12px;color:var(--text-primary)}.feature-description{font-size:15px;color:var(--text-secondary);line-height:1.6}.chat-input-container{padding:32px;max-width:900px;margin:0 auto}.chat-input-wrapper{background:var(--bg-card);border:1px solid var(--border-color);border-radius:16px;padding:16px;box-shadow:0 4px 20px var(--shadow)}.chat-input{width:100%;border:none;background:none;color:var(--text-primary);font-size:15px;font-family:Inter,sans-serif;resize:none;outline:none;min-height:60px}.chat-input::placeholder{color:var(--text-tertiary)}.chat-controls{display:flex;align-items:center;justify-content:space-between;margin-top:12px;padding-top:12px;border-top:1px solid var(--border-color)}.chat-tools{display:flex;gap:8px}.tool-btn{padding:8px 16px;border-radius:8px;border:1px solid var(--border-color);background:var(--bg-tertiary);color:var(--text-secondary);font-size:14px;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;gap:6px}.tool-btn:hover{border-color:var(--accent);color:var(--text-primary)}.submit-btn{width:44px;height:44px;border-radius:50%;border:none;background:var(--accent);color:#000;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease}.submit-btn:hover{background:var(--accent-hover);transform:scale(1.1)}.disclaimer{text-align:center;color:var(--text-tertiary);font-size:13px;margin-top:16px}.stats-section{padding:80px 32px;background:var(--bg-secondary);border-top:1px solid var(--border-color);border-bottom:1px solid var(--border-color)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:32px;max-width:1200px;margin:0 auto}.stat-card{text-align:center}.stat-number{font-size:56px;font-weight:700;background:linear-gradient(135deg,var(--brand-primary),var(--brand-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:12px}.stat-label{font-size:16px;color:var(--text-secondary);font-weight:500}.showcase-section{padding:80px 32px}.section-title{font-size:36px;font-weight:700;text-align:center;margin-bottom:16px;color:var(--text-primary)}.section-subtitle{font-size:18px;color:var(--text-secondary);text-align:center;margin-bottom:48px;max-width:600px;margin-left:auto;margin-right:auto}.showcase-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px;max-width:1200px;margin:0 auto}.showcase-card{border-radius:16px;overflow:hidden;background:var(--bg-card);border:1px solid var(--border-color);transition:all .3s ease;cursor:pointer}.showcase-card:hover{transform:translateY(-8px);box-shadow:0 12px 40px var(--shadow-lg)}.showcase-image{width:100%;height:200px;object-fit:cover}.showcase-content{padding:20px}.showcase-title{font-size:18px;font-weight:600;margin-bottom:8px;color:var(--text-primary)}.showcase-description{font-size:14px;color:var(--text-secondary);line-height:1.5}.testimonials-section{padding:80px 32px;background:var(--bg-secondary);border-top:1px solid var(--border-color)}.testimonials-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:24px;max-width:1200px;margin:0 auto}.testimonial-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:16px;padding:28px;transition:all .3s ease}.testimonial-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px var(--shadow-lg)}.testimonial-text{font-size:15px;color:var(--text-secondary);line-height:1.7;margin-bottom:20px}.testimonial-author{display:flex;align-items:center;gap:12px}.testimonial-avatar{width:48px;height:48px;border-radius:50%}.testimonial-info{flex:1}.testimonial-name{font-size:15px;font-weight:600;color:var(--text-primary)}.testimonial-role{font-size:13px;color:var(--text-tertiary)}.pricing-section{padding:80px 32px}.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;max-width:1000px;margin:0 auto}.pricing-card{background:var(--bg-card);border:2px solid var(--border-color);border-radius:20px;padding:36px;transition:all .3s ease;text-align:center;position:relative}.pricing-card.featured{border-color:var(--accent);transform:scale(1.05)}.pricing-card:hover{transform:translateY(-8px);box-shadow:0 16px 48px var(--shadow-lg)}.pricing-badge{position:absolute;top:-12px;left:50%;transform:translate(-50%);padding:4px 16px;background:var(--accent);color:#000;border-radius:20px;font-size:12px;font-weight:700;text-transform:uppercase}.pricing-name{font-size:24px;font-weight:700;margin-bottom:12px;color:var(--text-primary)}.pricing-price{font-size:48px;font-weight:700;color:var(--text-primary);margin-bottom:8px}.pricing-period{font-size:16px;color:var(--text-tertiary);margin-bottom:24px}.pricing-features{list-style:none;margin-bottom:32px;text-align:left}.pricing-feature{padding:12px 0;color:var(--text-secondary);font-size:15px;display:flex;align-items:center;gap:12px}.pricing-feature:before{content:"✓";color:var(--accent);font-weight:700;font-size:18px}.pricing-btn{width:100%;padding:14px;border-radius:10px;border:none;background:var(--accent);color:#000;font-size:16px;font-weight:600;cursor:pointer;transition:all .2s ease}.pricing-btn:hover{background:var(--accent-hover);transform:translateY(-2px)}.cta-section{padding:100px 32px;text-align:center;background:linear-gradient(135deg,var(--brand-primary),var(--brand-secondary));position:relative;overflow:hidden}.cta-title{font-size:48px;font-weight:700;color:#fff;margin-bottom:20px}.cta-description{font-size:20px;color:#ffffffe6;margin-bottom:32px;max-width:600px;margin-left:auto;margin-right:auto}.cta-btn{padding:16px 48px;border-radius:12px;border:none;background:#fff;color:#000;font-size:18px;font-weight:700;cursor:pointer;transition:all .2s ease}.cta-btn:hover{transform:translateY(-4px);box-shadow:0 12px 40px #0000004d}footer{background:var(--bg-secondary);border-top:1px solid var(--border-color);padding:60px 32px 32px}.footer-content{max-width:1200px;margin:0 auto 48px;display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:48px}.footer-section h3{font-size:16px;font-weight:700;margin-bottom:20px;color:var(--text-primary)}.footer-links{list-style:none}.footer-links li{margin-bottom:12px}.footer-links a{color:var(--text-secondary);text-decoration:none;font-size:14px;transition:color .2s ease}.footer-links a:hover{color:var(--accent)}.footer-bottom{max-width:1200px;margin:0 auto;padding-top:32px;border-top:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}.footer-copyright{color:var(--text-tertiary);font-size:14px}.footer-credits a{color:var(--text-secondary);text-decoration:none;font-size:14px}.footer-credits a:hover{color:var(--accent)}.toast{position:fixed;bottom:32px;right:32px;background:var(--bg-card);border:1px solid var(--border-color);padding:16px 24px;border-radius:12px;box-shadow:0 8px 32px var(--shadow-lg);display:flex;align-items:center;gap:12px;z-index:1000;transform:translateY(150%);transition:transform .3s ease}.toast.show{transform:translateY(0)}.toast-icon{width:24px;height:24px;border-radius:50%;background:var(--accent);display:flex;align-items:center;justify-content:center;color:#000;font-weight:700}.toast-message{color:var(--text-primary);font-size:14px}.mobile-menu{display:none;position:fixed;top:73px;left:0;right:0;bottom:0;background:var(--bg-sidebar);z-index:99;padding:24px;overflow-y:auto;transform:translate(-100%);transition:transform .3s ease}.mobile-menu.active{transform:translate(0)}.reveal{opacity:0;transform:translateY(30px)}.revealed{opacity:1;transform:translateY(0);transition:all .6s ease}@media(max-width:768px){.hamburger{display:flex}nav{display:none}.header-actions .lang-selector{display:none}.sidebar{position:fixed;left:0;top:73px;bottom:0;transform:translate(-100%);z-index:98}.sidebar.active{transform:translate(0)}.main-layout{display:block}.hero-title{font-size:32px}.section-title{font-size:28px}.cta-title{font-size:32px}.feature-cards,.stats-grid,.showcase-grid,.testimonials-grid,.pricing-grid{grid-template-columns:1fr}.pricing-card.featured{transform:scale(1)}.footer-content{grid-template-columns:1fr}.footer-bottom{flex-direction:column;text-align:center}.mobile-menu{display:block}}@keyframes tideShimmer{0%{background-position:-400px 0}to{background-position:400px 0}}.skel{border-radius:10px;background:linear-gradient(90deg,var(--bg-tertiary) 25%,var(--bg-hover) 50%,var(--bg-tertiary) 75%);background-size:800px 100%;animation:tideShimmer 1.1s linear infinite}@keyframes tidePageIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}.page-in{animation:tidePageIn .18s ease both}@media(prefers-reduced-motion:reduce){.page-in,.skel{animation:none}}.tide-toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%);background:var(--text-primary);color:var(--bg-primary);padding:10px 18px;border-radius:12px;font-size:14px;z-index:500;box-shadow:0 10px 30px #00000040;animation:tidePageIn .2s ease both}@media(max-width:860px){.chat-list-pane{display:none!important}}