@font-face{font-family:Svetze;src:url(/fonts/svetze/Svetze.otf) format("opentype");font-weight:400;font-style:normal;font-display:swap}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #ffffff;--bg-gradient: #ffffff;--surface: #f8fafc;--surface-2: #eff6ff;--surface-3: #e2e8f0;--border: #e2e8f0;--border-light: #f1f5f9;--accent: #2563eb;--accent-light: #3b82f6;--accent-dim: #1d4ed8;--accent-glow: rgba(37, 99, 235, .15);--text: #0f172a;--text-soft: #334155;--text-muted: #64748b;--user-bg: #f1f5f9;--bot-bg: transparent;--input-bg: #ffffff;--header-bg: rgba(255, 255, 255, .8);--btn-bg: #000000;--btn-text: #ffffff;--sidebar-w: 260px;--radius: 16px;--radius-lg: 24px;--font: "Inter", system-ui, -apple-system, sans-serif}[data-theme=dark]{--bg: #0f172a;--bg-gradient: #0f172a;--surface: #1e293b;--surface-2: #334155;--surface-3: #475569;--border: #334155;--border-light: #1e293b;--accent: #3b82f6;--accent-light: #60a5fa;--accent-dim: #2563eb;--accent-glow: rgba(59, 130, 246, .25);--text: #f8fafc;--text-soft: #cbd5e1;--text-muted: #94a3b8;--user-bg: #1e293b;--bot-bg: transparent;--input-bg: #1e293b;--header-bg: rgba(15, 23, 42, .8);--btn-bg: #ffffff;--btn-text: #000000}html,body{height:100%;background:var(--bg);color:var(--text);font-family:var(--font);font-size:14.5px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow:hidden}.layout{display:flex;height:100vh}.sidebar{width:var(--sidebar-w);min-width:var(--sidebar-w);display:flex;flex-direction:column;background:var(--surface);border-right:1px solid var(--border);transition:width .3s cubic-bezier(.4,0,.2,1),min-width .3s,transform .3s cubic-bezier(.4,0,.2,1);overflow:hidden;z-index:50}.sidebar.collapsed{width:0;min-width:0;border-right:none}.sidebar-top{padding:20px 16px 12px}.sidebar-brand{display:flex;align-items:center;gap:12px;padding:0 4px 16px}.sb-logo{width:32px;height:32px;flex-shrink:0;object-fit:contain}.sb-name{font-family:Svetze,serif;font-size:20px;font-weight:400;color:var(--text);letter-spacing:.5px}.new-chat-btn{width:100%;display:flex;align-items:center;gap:8px;padding:10px 14px;border-radius:12px;border:1px solid var(--border);background:var(--input-bg);color:var(--text);font-family:var(--font);font-size:13px;font-weight:500;cursor:pointer;transition:all .2s ease;box-shadow:0 2px 4px #00000005}.new-chat-btn:hover{border-color:var(--accent);box-shadow:0 4px 12px var(--accent-glow);color:var(--accent)}.new-chat-btn .plus{width:18px;height:18px;border-radius:6px;background:var(--surface-2);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600;color:var(--accent);flex-shrink:0;line-height:1;transition:all .2s}.new-chat-btn:hover .plus{background:var(--accent);color:#fff}.sessions-label{font-size:10.5px;font-weight:600;letter-spacing:1px;text-transform:uppercase;color:var(--text-muted);padding:16px 20px 6px}.sessions-list{flex:1;overflow-y:auto;padding:4px 12px 12px}.sessions-list::-webkit-scrollbar{width:3px}.sessions-list::-webkit-scrollbar-thumb{background:var(--border);border-radius:99px}.session-item{position:relative;display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;cursor:pointer;transition:all .2s ease;margin-bottom:4px;min-width:0;border:1px solid transparent}.session-item:hover{background:var(--surface-2);border-color:#3b82f633}.session-item.active{background:var(--input-bg);border-color:var(--border);box-shadow:0 2px 8px #0000000a}.session-item.active:before{content:"";position:absolute;left:-6px;top:12px;bottom:12px;width:3px;border-radius:99px;background:var(--accent)}.session-dot{width:8px;height:8px;border-radius:50%;background:var(--border);flex-shrink:0;transition:background .2s}.session-item.active .session-dot{background:var(--accent);box-shadow:0 0 8px var(--accent-glow)}.session-info{flex:1;min-width:0}.session-title{font-size:13px;font-weight:500;color:var(--text-soft);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:color .2s}.session-item.active .session-title{color:var(--text);font-weight:600}.session-date{font-size:10.5px;color:var(--text-muted);margin-top:2px}.session-del{display:none;background:transparent;border:none;color:var(--text-muted);cursor:pointer;font-size:12px;padding:2px 6px;border-radius:6px;flex-shrink:0;font-family:var(--font);transition:all .2s}.session-item:hover .session-del{display:block}.session-del:hover{color:#ef4444;background:#ef44441a}.sidebar-footer{padding:12px 16px;border-top:1px solid var(--border);font-family:Svetze,serif;font-size:13px;color:var(--text-muted);text-align:center;letter-spacing:.5px}.main{flex:1;display:flex;flex-direction:column;min-width:0;overflow:hidden;position:relative;background:var(--bg)}header{display:flex;align-items:center;gap:12px;padding:12px 24px;border-bottom:1px solid var(--border);background:var(--header-bg);-webkit-backdrop-filter:blur(24px);backdrop-filter:blur(24px);flex-shrink:0;z-index:10}.menu-btn{width:32px;height:32px;border-radius:8px;border:1px solid var(--border);background:var(--surface);color:var(--text-soft);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s;flex-shrink:0}.menu-btn:hover{background:var(--surface-2);color:var(--accent);border-color:#3b82f64d}.h-logo{width:32px;height:32px;flex-shrink:0;object-fit:contain;cursor:pointer;transition:all 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#00000005}.status-led{width:6px;height:6px;border-radius:50%;background:#10b981;box-shadow:0 0 8px #10b98166;transition:all .3s}.status-led.thinking{background:var(--accent);box-shadow:0 0 10px var(--accent-glow);animation:blink 1.2s ease-in-out infinite}@keyframes blink{0%,to{opacity:1;transform:scale(1)}50%{opacity:.4;transform:scale(.8)}}.chat-area{flex:1;overflow-y:auto;padding:24px 24px 120px;display:flex;flex-direction:column;gap:20px;scroll-behavior:smooth}.chat-area::-webkit-scrollbar{width:6px}.chat-area::-webkit-scrollbar-thumb{background:var(--border);border-radius:99px;border:2px solid var(--bg)}.welcome{display:flex;flex-direction:column;align-items:center;padding:10vh 20px 20px;text-align:center;animation:fadeUp .6s cubic-bezier(.16,1,.3,1) both}.welcome 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auto}.input-box:focus-within{border-color:var(--accent-light);box-shadow:0 12px 40px #00000014,0 0 0 3px var(--accent-glow);transform:translateY(-2px)}textarea{flex:1;background:transparent;border:none;outline:none;padding:8px 0;margin-bottom:2px;resize:none;color:var(--text);font-family:var(--font);font-size:16px;line-height:1.5;max-height:160px;min-height:24px;overflow-y:auto;caret-color:var(--accent)}textarea::placeholder{color:var(--text-muted);font-weight:400}textarea::-webkit-scrollbar{width:4px}textarea::-webkit-scrollbar-thumb{background:var(--border);border-radius:99px}.attach-btn{width:36px;height:36px;border-radius:50%;background:var(--input-bg);border:1px solid var(--border);cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--text-soft);transition:all 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a:hover{text-decoration:underline}.sidebar-overlay{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a4d;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:40;transition:opacity .3s}@media (max-width:768px){.sidebar{position:fixed;top:0;left:0;bottom:0;transform:translate(-100%);min-width:var(--sidebar-w)!important;width:var(--sidebar-w)!important}.sidebar.mobile-open{transform:translate(0);box-shadow:20px 0 40px #0000001a}.sidebar-overlay.active{display:block}.bubble{max-width:92%;padding:12px 16px;font-size:15px}.input-wrapper{padding:0 16px 20px}.chat-area{padding:16px 16px 110px}}