@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500&display=swap";:root{--bg: #0f0f13;--bg-surface: #18181f;--bg-surface-2: #1f1f28;--bg-surface-3: #26262f;--border: rgba(255, 255, 255, .06);--border-strong: rgba(255, 255, 255, .12);--accent: #5B8DEF;--accent-hover: #4a7ae0;--accent-2: #8B5CF6;--accent-glow: rgba(91, 141, 239, .15);--text-primary: #f0f0f4;--text-secondary: #8c8c99;--text-muted: #5a5a68;--user-msg-bg: #1e2a42;--ai-msg-bg: transparent;--success: #34d399;--warning: #fbbf24;--error: #f87171;--sidebar-width: 260px;--header-height: 60px;--input-height: 72px;--radius: 12px;--radius-sm: 8px;--shadow: 0 4px 24px rgba(0, 0, 0, .4);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--header-bg: rgba(15, 15, 19, .85);--neon-blue: #00f0ff;--neon-purple: #9d4edd;--neon-pink: #ff007a;--neon-glow-blue: 0 0 15px rgba(0, 240, 255, .45), 0 0 3px rgba(0, 240, 255, .2);--neon-glow-purple: 0 0 15px rgba(157, 78, 221, .4), 0 0 3px rgba(157, 78, 221, .15);--neon-glow-pink: 0 0 15px rgba(255, 0, 122, .4), 0 0 3px rgba(255, 0, 122, .15)}body.light{--bg: #f8f9fa;--bg-surface: #ffffff;--bg-surface-2: #f1f3f4;--bg-surface-3: #e8eaed;--border: rgba(0, 0, 0, .08);--border-strong: rgba(0, 0, 0, .16);--text-primary: #202124;--text-secondary: #5f6368;--text-muted: #80868b;--user-msg-bg: #e8f0fe;--accent-glow: rgba(91, 141, 239, .08);--header-bg: rgba(248, 249, 250, .85);--neon-blue: #008cff;--neon-purple: #7b2cbf;--neon-glow-blue: 0 0 8px rgba(0, 140, 255, .25);--neon-glow-purple: 0 0 8px rgba(123, 44, 191, .2)}.glow-text{text-shadow:var(--neon-glow-blue)}.glow-text-purple{text-shadow:var(--neon-glow-purple)}.glow-border{border-color:var(--neon-blue)!important;box-shadow:var(--neon-glow-blue)}.glow-border-purple{border-color:var(--neon-purple)!important;box-shadow:var(--neon-glow-purple)}.glow-card{position:relative;overflow:hidden}.glow-card:after{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--neon-blue),var(--neon-purple),var(--neon-pink))}.glow-button{background:linear-gradient(135deg,var(--neon-blue),var(--neon-purple))!important;box-shadow:var(--neon-glow-blue);color:#fff!important;font-weight:600!important;transition:all .25s ease-in-out!important}.glow-button:hover{filter:brightness(1.2);box-shadow:0 0 20px #00f0ff99,0 0 6px #9d4edd66;transform:translateY(-1px)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{min-height:100vh;overflow-y:auto;background-color:var(--bg);color:var(--text-primary);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--bg-surface-3);border-radius:999px}::-webkit-scrollbar-thumb:hover{background:var(--border-strong)}::selection{background:var(--accent-glow);color:var(--text-primary)}.header{height:var(--header-height);display:flex;align-items:center;justify-content:space-between;padding:0 20px;background:var(--header-bg);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;flex-shrink:0;-webkit-transform:translateZ(0)}@supports not 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var(--border-strong);color:var(--text-secondary);display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:var(--shadow);z-index:100;transition:all .22s cubic-bezier(.4,0,.2,1);animation:fadeInButton .2s ease-out}.scroll-bottom-btn:hover{background:var(--accent);color:#fff;border-color:transparent;transform:translateY(-2px);box-shadow:0 4px 12px var(--accent-glow)}@keyframes fadeInButton{0%{opacity:0;transform:scale(.9) translateY(4px)}to{opacity:1;transform:scale(1) translateY(0)}}.chat-messages{flex:1;overflow-y:auto;padding:24px 0;display:flex;flex-direction:column;gap:0}.chat-empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:32px;padding:40px 24px}.chat-empty-icon{width:64px;height:64px;background:linear-gradient(135deg,var(--accent),var(--accent-2));border-radius:18px;display:flex;align-items:center;justify-content:center;font-size:28px;box-shadow:0 8px 32px 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.25s}.home-feature-card:hover{border-color:var(--border-strong);transform:translateY(-3px);box-shadow:var(--shadow)}.home-feature-icon{width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:16px}.home-feature-icon-1{background:rgba(91,141,239,.12)}.home-feature-icon-2{background:rgba(139,92,246,.12)}.home-feature-icon-3{background:rgba(52,211,153,.12)}.home-feature-icon-4{background:rgba(251,191,36,.12)}.home-feature-title{font-size:16px;font-weight:700;color:var(--text-primary);margin-bottom:8px}.home-feature-desc{font-size:14px;color:var(--text-secondary);line-height:1.6}.footer{border-top:1px solid var(--border);background:var(--bg-surface);padding:20px 32px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;flex-shrink:0}.footer-left,.footer-right{font-size:13px;color:var(--text-muted)}.footer-right a{color:var(--accent);text-decoration:none;font-weight:500}.footer-right a:hover{text-decoration:underline}.nav-links-center{display:flex;align-items:center;gap:28px;position:absolute;left:50%;transform:translate(-50%);pointer-events:auto}.nav-links{display:flex;align-items:center;gap:24px}.nav-link-item{color:var(--text-secondary);font-size:14px;font-weight:500;text-decoration:none;transition:color .18s;cursor:pointer}.nav-link-item:hover{color:var(--text-primary)}.nav-menu-btn{display:none}@media (max-width: 768px){.sidebar{position:fixed;top:var(--header-height);left:-100%;height:calc(100vh - var(--header-height));z-index:999;transition:left .3s ease-in-out;box-shadow:10px 0 30px #00000080}.sidebar.open{left:0}.mobile-header-toggle{display:flex!important}.nav-links,.nav-links-center,.nav-auth-btns{display:none}.header{background:var(--bg-surface)!important;backdrop-filter:none!important;-webkit-backdrop-filter:none!important}.nav-menu-btn{display:flex!important;align-items:center;justify-content:center;background:transparent;border:none;color:var(--text-primary);cursor:pointer;font-size:20px;padding:6px;margin-right:8px}.mobile-nav-overlay{position:fixed;top:var(--header-height);left:0;right:0;bottom:0;background:var(--bg-surface);display:flex;flex-direction:column;padding:28px 24px;gap:16px;z-index:1000;border-top:1px solid var(--border);animation:slideDown .2s ease-out}@keyframes slideDown{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.mobile-nav-link{background:transparent;border:none;text-align:left;padding:10px 0;cursor:pointer;width:100%;font-size:16px;font-weight:600}.mobile-nav-divider{border-bottom:1px solid var(--border);margin:4px 0}.chat-suggestion-card:nth-child(3),.chat-suggestion-card:nth-child(4){display:none}.chat-suggestions{grid-template-columns:1fr}.auth-card{padding:28px 20px}.home-features{grid-template-columns:1fr}.footer{flex-direction:column;text-align:center}}#root{min-height:100vh;display:flex;flex-direction:column}@keyframes spin{to{transform:rotate(360deg)}}