*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #0f0f0f;--bg2: #1a1a1a;--bg3: #242424;--bg4: #2e2e2e;--border: #333;--text: #e8e8e8;--text2: #a0a0a0;--text3: #666;--accent: #4a9eff;--accent2: #1d6fd6;--green: #22c55e;--red: #ef4444;--amber: #f59e0b;--radius: 8px;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mono: "JetBrains Mono", "Fira Code", monospace;--sidebar-w: 260px}body{background:var(--bg);color:var(--text);font-family:var(--font);font-size:15px;line-height:1.6}button{cursor:pointer;font-family:inherit;font-size:inherit;border:none;background:none;color:inherit}input,textarea,select{font-family:inherit;font-size:inherit}a{color:var(--accent)}.loading-screen{display:flex;align-items:center;justify-content:center;height:100vh}.spinner{width:32px;height:32px;border:3px solid var(--bg4);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.btn-primary{background:var(--accent);color:#fff;border-radius:var(--radius);padding:10px 20px;font-weight:500;transition:background .15s;width:100%}.btn-primary:hover:not(:disabled){background:var(--accent2)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-icon{display:flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:6px;color:var(--text2);transition:background .15s,color .15s}.btn-icon:hover{background:var(--bg4);color:var(--text)}.btn-icon-sm{display:flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:4px;color:var(--text3);transition:background .1s}.btn-icon-sm:hover{background:var(--bg4);color:var(--text2)}.btn-icon-sm.danger:hover{color:var(--red)}.btn-danger-sm{font-size:12px;color:var(--red);padding:3px 8px;border-radius:4px;border:1px solid var(--red);opacity:.7}.btn-danger-sm:hover{opacity:1}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg)}.login-card{width:360px;background:var(--bg2);border:1px solid var(--border);border-radius:12px;padding:32px}.login-logo{text-align:center;margin-bottom:28px}.login-logo .logo-icon{margin-bottom:12px}.login-logo h1{font-size:22px;font-weight:600;margin-bottom:4px}.login-logo p{color:var(--text2);font-size:14px}.login-form{display:flex;flex-direction:column;gap:16px}.field{display:flex;flex-direction:column;gap:6px}.field label{font-size:13px;color:var(--text2);font-weight:500}.field small{font-size:12px;color:var(--text3)}.field input{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);padding:10px 12px;color:var(--text);outline:none;transition:border-color .15s}.field input:focus{border-color:var(--accent)}.error-msg{font-size:13px;color:var(--red);background:#ef444414;border:1px solid rgba(239,68,68,.2);border-radius:6px;padding:8px 12px}.success-msg{font-size:13px;color:var(--green);background:#22c55e14;border:1px solid rgba(34,197,94,.2);border-radius:6px;padding:8px 12px}.chat-layout{display:flex;height:100vh;overflow:hidden}.sidebar{width:var(--sidebar-w);background:var(--bg2);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0;transition:width .2s;overflow:hidden}.sidebar.closed{width:0}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:12px;border-bottom:1px solid var(--border);flex-shrink:0}.app-brand{display:flex;align-items:center;gap:8px;font-weight:600;font-size:15px}.sessions-list{flex:1;overflow-y:auto;padding:8px}.session-item{display:flex;align-items:center;justify-content:space-between;padding:8px 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var(--border);flex-shrink:0;background:var(--bg2)}.chat-title{flex:1;font-size:14px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.status-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}.messages-list{flex:1;overflow-y:auto;padding:24px 16px;display:flex;flex-direction:column;gap:16px;max-width:800px;width:100%;margin:0 auto}.messages-empty{flex:1;display:flex;align-items:center;justify-content:center;color:var(--text3);font-size:14px}.message{display:flex;gap:12px}.message.user{flex-direction:row-reverse}.message.user .msg-content{background:var(--accent);color:#fff;border-radius:18px 18px 4px;max-width:75%}.message.assistant .msg-content{background:var(--bg2);border:1px solid var(--border);border-radius:18px 18px 18px 4px;max-width:85%}.msg-avatar{width:28px;height:28px;border-radius:50%;background:var(--bg3);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:2px}.msg-content{padding:10px 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.15s}.chat-input-wrap:focus-within{border-color:var(--accent)}.chat-input-wrap.disabled{opacity:.6}.chat-textarea{flex:1;background:none;border:none;outline:none;color:var(--text);resize:none;max-height:200px;overflow-y:auto;line-height:1.5;font-size:15px;text-align:center}.send-btn{width:32px;height:32px;border-radius:8px;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:background .15s}.send-btn:hover:not(:disabled){background:var(--accent2)}.send-btn:disabled{opacity:.4;cursor:not-allowed}.input-hint{font-size:11px;color:var(--text3);text-align:center;margin-top:6px}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;color:var(--text2);text-align:center;padding:40px}.empty-icon{margin-bottom:8px;opacity:.7}.empty-state h2{font-size:20px;font-weight:600;color:var(--text)}.empty-state p{color:var(--text2);font-size:14px;max-width:320px}.empty-state 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.msg-content,.message.assistant .msg-content,.tool-call-card{max-width:92%}.messages-list{padding:16px 12px}.chat-input-bar{padding:10px 12px max(10px,env(safe-area-inset-bottom))}.input-hint{display:none}.add-user-form{grid-template-columns:1fr}.add-user-form .btn-primary{grid-column:1}}@supports (padding: max(0px)){.chat-header,.sidebar-header{padding-top:max(12px,env(safe-area-inset-top))}.login-page{padding-top:env(safe-area-inset-top)}}