#app{width:100%;min-height:100vh}*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #07c160;--bg-color: #ededed;--chat-bg: #f5f5f5;--bubble-self: #95ec69;--bubble-other: #ffffff;--text-color: #333;--text-secondary: #999;--border-color: #ddd}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-color);min-height:100vh;-webkit-tap-highlight-color:transparent}input,button{font-family:inherit;font-size:inherit}button{cursor:pointer;border:none;background:var(--primary-color);color:#fff;padding:12px 24px;border-radius:8px;font-size:16px}button:active{opacity:.8}button:disabled{background:#ccc;cursor:not-allowed}input{width:100%;padding:12px 16px;border:1px solid var(--border-color);border-radius:8px;font-size:16px;outline:none}input:focus{border-color:var(--primary-color)}.container{max-width:500px;margin:0 auto;padding:20px}