@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600&display=swap');

        body {
            margin: 0;
            padding: 0;
            font-family: 'Poppins', sans-serif;
            background: #f4f7f6;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
        }

        .login-card {
            background: white;
            padding: 60px 40px 40px 40px; /* Padding atas ditambah untuk tombol kembali */
            border-radius: 20px;
            box-shadow: 0 15px 35px rgba(0,0,0,0.1);
            width: 100%;
            max-width: 400px;
            text-align: center;
            position: relative; /* Penting untuk posisi tombol kembali */
        }

        .btn-back {
            position: absolute;
            top: 20px;
            left: 20px;
            text-decoration: none;
            color: #888;
            font-size: 0.85rem;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 5px;
            transition: all 0.3s ease;
        }

        .btn-back:hover {
            color: #fc0000;
            transform: translateX(-5px); /* Animasi geser ke kiri */
        }

        .login-card h2 {
            margin-bottom: 30px;
            color: #333;
            font-weight: 600;
        }

        .form-group {
            margin-bottom: 20px;
            text-align: left;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: #666;
            font-size: 0.9rem;
        }

        /* Wrapper untuk input password dan icon mata */
        .password-wrapper {
            position: relative;
            display: flex;
            align-items: center;
        }

        .form-group input {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: 10px;
            box-sizing: border-box;
            outline: none;
            transition: 0.3s;
        }

        .form-group input:focus {
            border-color: #5F9AEA;
            box-shadow: 0 0 0 3px rgba(95, 154, 234, 0.1);
        }

        .toggle-password {
            position: absolute;
            right: 15px;
            cursor: pointer;
            color: #aaa;
            transition: 0.3s;
        }

        .toggle-password:hover {
            color: #5F9AEA;
        }

        /* --- TOMBOL DENGAN WARNA BERGERAK --- */
        .btn-login {
            width: 100%;
            padding: 12px;
            border: none;
            border-radius: 10px;
            color: white;
            font-weight: bold;
            font-size: 1rem;
            cursor: pointer;
            background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
            background-size: 400% 400%;
            animation: gradientMove 5s ease infinite;
            transition: 0.3s;
        }

        .btn-login:hover {
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        }

        @keyframes gradientMove {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }

        .error-msg {
            color: #e74c3c;
            font-size: 0.85rem;
            margin-bottom: 15px;
        }