*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:#f2f2f5;font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Yu Gothic,sans-serif}.chat-container{background:#fff;flex-direction:column;max-width:600px;height:100vh;margin:0 auto;display:flex;box-shadow:0 0 12px #00000014}.chat-header{background:#fff;border-bottom:1px solid #eee;justify-content:space-between;align-items:center;padding:16px;font-size:1.1rem;font-weight:700;display:flex}.chat-header button{color:#555;cursor:pointer;background:#fff;border:1px solid #ddd;border-radius:8px;padding:6px 10px}.chat-header button:disabled{color:#bbb;cursor:not-allowed}.chat-messages{flex-direction:column;flex:1;gap:10px;padding:16px;display:flex;overflow-y:auto}.message{display:flex}.message.user{justify-content:flex-end}.message.assistant{justify-content:flex-start}.bubble{white-space:pre-wrap;word-break:break-word;border-radius:16px;max-width:75%;padding:10px 14px;line-height:1.5}.message.user .bubble{color:#fff;background:#4f7cff;border-bottom-right-radius:4px}.message.assistant .bubble{color:#222;background:#eee;border-bottom-left-radius:4px}.bubble.typing{color:#999}.chat-input-area{background:#fff;border-top:1px solid #eee;gap:8px;padding:12px;display:flex}.chat-input-area textarea{resize:none;border:1px solid #ddd;border-radius:10px;flex:1;padding:10px;font-family:inherit;font-size:1rem}.chat-input-area button{color:#fff;cursor:pointer;background:#4f7cff;border:none;border-radius:10px;padding:0 18px;font-weight:700}.chat-input-area button:disabled{cursor:not-allowed;background:#ccc}.passcode-gate{background:#f2f2f5;justify-content:center;align-items:center;height:100vh;display:flex}.passcode-box{background:#fff;border-radius:14px;flex-direction:column;gap:12px;width:260px;padding:28px;display:flex;box-shadow:0 2px 16px #00000014}.passcode-title{text-align:center;margin-bottom:4px;font-weight:700}.passcode-box input{border:1px solid #ddd;border-radius:8px;padding:10px;font-size:1rem}.passcode-box button{color:#fff;cursor:pointer;background:#4f7cff;border:none;border-radius:8px;padding:10px;font-weight:700}.passcode-box button:disabled{cursor:not-allowed;background:#ccc}.passcode-error{color:#e05252;text-align:center;font-size:.85rem}