*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%}:root{--bg-color: #343541;--chat-bg: #343541;--input-bg: #40414f;--assistant-bubble: #444654;--text-primary: #ececf1;--text-secondary: #c5c5d2;--btn-primary: #10a37f}body{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background-color:var(--bg-color);color:var(--text-primary);overflow:hidden}.login-screen{flex:1;display:flex;align-items:center;justify-content:center}.login-box{background:#202123;padding:2rem;border-radius:8px;width:90%;max-width:320px;box-shadow:0 0 15px #00000080;text-align:center}.login-title{font-size:1.5rem;margin-bottom:1.5rem;font-weight:600}.login-input{width:100%;padding:12px;margin-bottom:1rem;background:var(--bg-color);border:1px solid rgba(255,255,255,.15);border-radius:4px;color:#fff;font-size:1rem}.login-btn{width:100%;padding:12px;background:var(--btn-primary);color:#fff;border:none;border-radius:4px;font-size:1rem;cursor:pointer;font-weight:500}.login-btn:disabled{opacity:.7;cursor:default}.login-error{margin-top:1rem;color:#ff6b6b;font-size:.9rem}.app{height:100%;display:flex;flex-direction:column}.header{position:relative;background:#202123;padding:10px 16px;border-bottom:1px solid rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center}.app-title{font-size:.95rem;font-weight:600}.logout-btn{position:absolute;right:16px;padding:6px 12px;border-radius:999px;border:1px solid rgba(148,163,184,.7);background:radial-gradient(circle at top,#0f172a,#020617);color:#e5e7eb;font-size:.78rem;cursor:pointer}.main{flex:1;display:flex;flex-direction:column;min-height:0}.main-initial{justify-content:center}.messages{padding:24px 0;flex:1;overflow-y:auto}.messages::-webkit-scrollbar{width:8px}.messages::-webkit-scrollbar-track{background:transparent}.messages::-webkit-scrollbar-thumb{background:#94a3b866;border-radius:999px}.messages::-webkit-scrollbar-thumb:hover{background:#94a3b8b3}.messages{scrollbar-width:thin;scrollbar-color:rgba(148,163,184,.6) transparent}.messages-initial{display:flex;flex-direction:column;justify-content:center}.initial-block{display:flex;justify-content:center;margin-bottom:12px}.initial-text{max-width:768px;padding:16px;background:var(--assistant-bubble);border-radius:8px;font-size:1rem;line-height:1.6;text-align:center}.message-row{max-width:768px;margin:0 auto;padding:22px 16px;border-bottom:1px solid rgba(0,0,0,.1);border-radius:12px}.message-row.assistant{background:var(--assistant-bubble)}.message-row.user{background:var(--chat-bg)}.message-content{display:flex;gap:16px;font-size:1rem;line-height:1.6}.avatar{width:30px;height:30px;border-radius:4px;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-weight:600;font-size:14px}.avatar.user{background:#5436da;color:#fff}.avatar.assistant{background:var(--btn-primary);color:#fff}.text{flex:1;white-space:pre-wrap;word-wrap:break-word}.typing-dots{display:inline-flex;gap:4px;align-items:center}.typing-dot{width:6px;height:6px;border-radius:999px;background:#38bdf8;animation:typing-bounce 1s infinite ease-in-out}.typing-dot:nth-child(2){animation-delay:.15s}.typing-dot:nth-child(3){animation-delay:.3s}@keyframes typing-bounce{0%,80%,to{transform:scale(.6);opacity:.4}40%{transform:scale(1);opacity:1}}.input-area{padding:8px 16px 20px;background:linear-gradient(180deg,rgba(53,53,65,0),var(--bg-color) 50%)}.app:not(.initial) .input-area{margin-bottom:16px}.input-container{max-width:768px;margin:0 auto;position:relative}.chat-input{width:100%;background:var(--input-bg);border:1px solid rgba(0,0,0,.2);color:#fff;border-radius:12px;padding:14px 48px 14px 16px;font-size:1rem;font-family:inherit;outline:none}.chat-input:focus{border-color:#ffffff4d}.send-btn{position:absolute;right:12px;top:50%;transform:translateY(-50%);background:transparent;border:none;color:var(--text-secondary);cursor:pointer;padding:4px;border-radius:4px}.send-btn:disabled{opacity:.4;cursor:default}.mode-toggle{margin-top:4px;display:flex;justify-content:center}.mode-button{border-radius:999px;border:1px solid rgba(148,163,184,.9);padding:6px 12px;font-size:.78rem;background:radial-gradient(circle at top left,#0f172a,#020617);color:#e5e7eb;cursor:pointer;display:inline-flex;align-items:center;gap:6px}.mode-button .badge{border-radius:999px;padding:2px 8px;font-size:.7rem;background:#0f766e;color:#ecfdf5}.mode-button.expanded .badge{background:#1d4ed8;color:#dbeafe}@media (max-width: 768px){.message-content{padding:0 12px}.input-area{padding:14px 12px 22px}}