*{box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;margin:0;padding:0;background-color:#f5f5f5}.container{max-width:800px;margin:0 auto;padding:20px;background-color:#fff;min-height:100vh}h1{color:#333;text-align:center;margin-bottom:30px}h2{color:#555;margin-bottom:20px}.signin-section{text-align:center;padding:40px 20px}.signin-button,.refresh-button{background-color:#4285f4;color:#fff;border:none;padding:12px 24px;font-size:16px;border-radius:4px;cursor:pointer;transition:background-color .3s}.signin-button:hover,.refresh-button:hover{background-color:#3367d6}.signin-button:disabled,.refresh-button:disabled{background-color:#ccc;cursor:not-allowed}.emails-section{margin-top:30px}.refresh-button{margin-bottom:20px}.email-list{list-style:none;padding:0;margin:0}.email-item{background-color:#f9f9f9;padding:15px;margin-bottom:10px;border-radius:4px;border-left:4px solid #4285f4}.error{background-color:#ffebee;color:#c62828;padding:12px;border-radius:4px;margin-top:20px;border:1px solid #ffcdd2}