*{margin:0;padding:0;box-sizing:border-box}body{font-family:Arial,sans-serif;background:linear-gradient(135deg,#8b4513,sienna);display:flex;justify-content:center;align-items:center;min-height:100vh;padding:20px}.auth-container{background:#fff;border-radius:12px;box-shadow:0 10px 40px #0000004d;width:100%;max-width:400px;overflow:hidden}.auth-header{background-color:#8b4513;color:#fff;padding:30px 20px;text-align:center}.auth-header h1{font-size:28px;margin-bottom:10px}.auth-header p{font-size:14px;opacity:.9}.beta-banner{background-color:#fff3cd;border-bottom:2px solid #ffc107;padding:15px 20px;text-align:center}.beta-banner p{margin:0;font-size:13px;color:#856404;line-height:1.5}.beta-banner a{color:#8b4513;text-decoration:none;font-weight:700}.beta-banner a:hover{text-decoration:underline}.auth-body{padding:30px}.auth-tabs{display:flex;margin-bottom:30px;border-bottom:2px solid #eee}.auth-tab{flex:1;padding:12px;text-align:center;background:none;border:none;cursor:pointer;font-size:16px;font-weight:700;color:#999;transition:all .3s ease;border-bottom:3px solid transparent;margin-bottom:-2px}.auth-tab.active{color:#8b4513;border-bottom-color:#8b4513}.auth-tab:hover{color:#8b4513}.auth-form{display:none}.auth-form.active{display:block}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:8px;font-weight:700;color:#333;font-size:14px}.form-group input{width:100%;padding:12px;border:1px solid #ddd;border-radius:6px;font-size:14px;transition:border-color .3s ease}.form-group input:focus{outline:none;border-color:#8b4513}.form-button{width:100%;padding:14px;background-color:#8b4513;color:#fff;border:none;border-radius:6px;font-size:16px;font-weight:700;cursor:pointer;transition:background-color .3s ease}.form-button:hover{background-color:sienna}.form-button:disabled{background-color:#ccc;cursor:not-allowed}.message{padding:12px;border-radius:6px;margin-bottom:20px;font-size:14px;display:none}.message.error{background-color:#f8d7da;color:#721c24;border:1px solid #f5c6cb}.message.success{background-color:#d4edda;color:#155724;border:1px solid #c3e6cb}.message.info{background-color:#d1ecf1;color:#0c5460;border:1px solid #bee5eb}.loading-spinner{display:inline-block;width:16px;height:16px;border:3px solid rgba(255,255,255,.3);border-radius:50%;border-top-color:#fff;animation:spin .8s linear infinite;margin-left:8px;vertical-align:middle}@keyframes spin{to{transform:rotate(360deg)}}.form-footer{margin-top:20px;text-align:center;font-size:13px;color:#666}.form-footer a{color:#8b4513;text-decoration:none;font-weight:700}.form-footer a:hover{text-decoration:underline}@media (max-width: 480px){.auth-container{max-width:100%}.auth-header h1{font-size:24px}.auth-body{padding:20px}}