* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background: linear-gradient(135deg, #ffeff2 0%, #fff5f7 100%);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
        }

        .container {
            display: flex;
            width: 100%;
            max-width: 1000px;
            background: white;
            border-radius: 24px;
            overflow: hidden;
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }

        .left-panel {
            flex: 1;
            background: linear-gradient(135deg, #ff6b9d 0%, #ff8fab 100%);
            color: white;
            padding: 50px 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }

        .left-panel::before {
            content: '';
            position: absolute;
            top: -50px;
            right: -50px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
        }

        .left-panel::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -80px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
        }

        .logo {
            display: flex;
            align-items: center;
            margin-bottom: 30px;
        }

        .logo i {
            font-size: 32px;
            margin-right: 10px;
        }

        .logo h1 {
            font-size: 28px;
            font-weight: 700;
        }

        .left-panel h2 {
            font-size: 32px;
            margin-bottom: 20px;
            line-height: 1.3;
        }

        .left-panel p {
            font-size: 16px;
            line-height: 1.6;
            margin-bottom: 30px;
            opacity: 0.9;
        }

        .features {
            list-style: none;
            margin-top: 20px;
        }

        .features li {
            margin-bottom: 15px;
            display: flex;
            align-items: center;
        }

        .features i {
            margin-right: 10px;
            font-size: 18px;
        }

        .right-panel {
            flex: 1;
            padding: 50px 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .form-container {
            width: 100%;
            max-width: 400px;
            margin: 0 auto;
        }

        .tabs {
            display: flex;
            margin-bottom: 30px;
            border-bottom: 1px solid #eee;
        }

        .tab {
            padding: 12px 20px;
            cursor: pointer;
            font-weight: 600;
            color: #888;
            transition: all 0.3s ease;
            position: relative;
        }

        .tab.active {
            color: #ff6b9d;
        }

        .tab.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 0;
            width: 100%;
            height: 3px;
            background: #ff6b9d;
            border-radius: 3px 3px 0 0;
        }

        .form {
            display: none;
        }

        .form.active {
            display: block;
            animation: fadeIn 0.5s ease;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .form h3 {
            font-size: 24px;
            margin-bottom: 25px;
            color: #333;
        }

        .input-group {
            margin-bottom: 20px;
            position: relative;
        }

        .input-group i {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: #999;
        }

        .input-group input {
            width: 100%;
            padding: 15px 15px 15px 45px;
            border: 1px solid #e1e1e1;
            border-radius: 12px;
            font-size: 16px;
            transition: all 0.3s ease;
        }

        .input-group input:focus {
            outline: none;
            border-color: #ff6b9d;
            box-shadow: 0 0 0 3px rgba(255, 107, 157, 0.2);
        }

        .options {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 25px;
            font-size: 14px;
        }

        .remember {
            display: flex;
            align-items: center;
        }

        .remember input {
            margin-right: 8px;
        }

        .forgot {
            color: #ff6b9d;
            text-decoration: none;
            font-weight: 500;
        }

        .forgot:hover {
            text-decoration: underline;
        }

        .btn {
            width: 100%;
            padding: 15px;
            background: #ff6b9d;
            color: white;
            border: none;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-bottom: 20px;
        }

        .btn:hover {
            background: #ff4d87;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(255, 107, 157, 0.3);
        }

        .divider {
            text-align: center;
            margin: 25px 0;
            position: relative;
            color: #999;
        }

        .divider::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 0;
            width: 45%;
            height: 1px;
            background: #eee;
        }

        .divider::after {
            content: '';
            position: absolute;
            top: 50%;
            right: 0;
            width: 45%;
            height: 1px;
            background: #eee;
        }

        .social-login {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 25px;
        }

        .social-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            background: #f5f5f5;
            color: #555;
            font-size: 18px;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .social-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
        }

        .facebook { color: #3b5998; }
        .google { color: #db4437; }
        .twitter { color: #1da1f2; }

        .signup-text {
            text-align: center;
            font-size: 14px;
            color: #666;
        }

        .signup-text a {
            color: #ff6b9d;
            text-decoration: none;
            font-weight: 600;
        }

        .signup-text a:hover {
            text-decoration: underline;
        }

        
        @media (max-width: 768px) {
            .container {
                flex-direction: column;
            }
            
            .left-panel {
                padding: 30px 20px;
            }
            
            .right-panel {
                padding: 30px 20px;
            }
        }