:root {
            /* Warna utama yang disesuaikan dengan logo WP Instant */
            --primary: #0A192F;      /* Biru gelap dari latar belakang logo */
            --secondary: #4A90E2;    /* Biru terang dari tulisan logo */
            --accent: #10B981;       /* Hijau, berfungsi sebagai warna aksen yang kontras dan menarik perhatian (misal: tombol CTA) */

            /* Palet warna netral yang mendukung */
            --text: #1F2937;         /* Teks utama (abu-abu gelap) */
            --light-bg: #F3F4F6;     /* Latar belakang terang (abu-abu muda) */
            --white: #FFFFFF;

            /* Skala abu-abu (tetap bisa digunakan, tapi disarankan untuk menambahkan sedikit hint biru) */
            --gray-100: #F9FAFB;
            --gray-200: #E5E7EB;
            --gray-300: #D1D5DB;
            --gray-400: #9CA3AF;
            --gray-500: #6B7280;
            --gray-600: #4B5563;
            --gray-700: #374151;
            --gray-800: #1F2937;
            --gray-900: #111827;
            
            /* Status colors */
            --success: #10B981;
            --error: #EF4444;
            --warning: #F59E0B;
        }

        .auth-page-wrapper {
            display: flex;
            justify-content: center; /* center horizontal */
            align-items: center;     /* center vertical */
            min-height: calc(100vh - 80px); /* sesuaikan jika ada navbar tinggi 80px */
            padding: 20px;
            background: #f5f6fa; /* optional background */
        }


        #auth-container {
            background: var(--white);
            width: 100%;
            max-width: 440px;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        #auth-container:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
        }

        .auth-header {
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            color: var(--white);
            padding: 25px;
            text-align: center;
        }

        .auth-header h2 {
            font-size: 24px;
            font-weight: 600;
            margin-bottom: 5px;
        }

        .auth-header p {
            opacity: 0.9;
            font-size: 14px;
        }

        .auth-tabs {
            display: flex;
            background: var(--gray-100);
            border-bottom: 1px solid var(--gray-200);
        }

        .auth-tabs button {
            flex: 1;
            padding: 16px;
            background: none;
            border: none;
            cursor: pointer;
            font-size: 16px;
            font-weight: 500;
            color: var(--gray-600);
            transition: all 0.3s ease;
            position: relative;
        }

        .auth-tabs button.active {
            color: var(--secondary);
            font-weight: 600;
        }

        .auth-tabs button.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--secondary), var(--accent));
            border-radius: 3px 3px 0 0;
        }

        .auth-tabs button:hover {
            background: var(--gray-200);
        }

        .auth-form {
            padding: 25px;
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: var(--gray-700);
            font-size: 14px;
        }

        .input-with-icon {
            position: relative;
        }

        .input-icon {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--gray-400);
            font-size: 16px;
        }

        input[type="text"],
        input[type="email"],
        input[type="password"] {
            width: 100%;
            padding: 14px 14px 14px 45px;
            border: 1px solid var(--gray-300);
            border-radius: 8px;
            font-size: 15px;
            transition: all 0.3s ease;
            background: var(--gray-100);
        }

        input:focus {
            outline: none;
            border-color: var(--secondary);
            box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.15);
            background: var(--white);
        }

        .password-toggle {
            position: absolute;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--gray-400);
            cursor: pointer;
            font-size: 16px;
        }

        .password-toggle:hover {
            color: var(--secondary);
        }

        .form-options {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            font-size: 14px;
        }

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

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

        .forgot-password {
            color: var(--secondary);
            text-decoration: none;
            font-weight: 500;
        }

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

        .submit-btn {
            width: 100%;
            padding: 14px;
            background: linear-gradient(135deg, var(--secondary) 0%, var(--accent) 100%);
            color: var(--white);
            border: none;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 6px rgba(74, 144, 226, 0.2);
        }

        .submit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 7px 14px rgba(74, 144, 226, 0.3);
        }

        .submit-btn:active {
            transform: translateY(0);
        }

        .auth-divider {
            display: flex;
            align-items: center;
            margin: 25px 0;
            color: var(--gray-400);
        }

        .auth-divider::before,
        .auth-divider::after {
            content: '';
            flex: 1;
            height: 1px;
            background: var(--gray-300);
        }

        .auth-divider span {
            padding: 0 15px;
            font-size: 14px;
        }

        .social-auth {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            margin-bottom: 20px;
        }

        .social-btn {
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 12px;
            border: 1px solid var(--gray-300);
            border-radius: 8px;
            background: var(--white);
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .social-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }

        .social-btn.google {
            color: #DB4437;
        }

        .social-btn.facebook {
            color: #4267B2;
        }

        .social-btn.github {
            color: #333;
        }

        .auth-footer {
            text-align: center;
            margin-top: 20px;
            font-size: 14px;
            color: var(--gray-600);
        }

        .auth-footer a {
            color: var(--secondary);
            text-decoration: none;
            font-weight: 500;
        }

        .auth-footer a:hover {
            text-decoration: underline;
        }

        .message {
            padding: 12px;
            border-radius: 8px;
            margin-bottom: 20px;
            font-size: 14px;
            display: none;
        }

        .message.success {
            background: rgba(16, 185, 129, 0.1);
            color: var(--success);
            border: 1px solid rgba(16, 185, 129, 0.2);
        }

        .message.error {
            background: rgba(239, 68, 68, 0.1);
            color: var(--error);
            border: 1px solid rgba(239, 68, 68, 0.2);
        }

        /* Responsive styles */
        @media (max-width: 480px) {
            #auth-container {
                max-width: 100%;
            }
            
            .auth-form {
                padding: 20px;
            }
            
            .social-auth {
                grid-template-columns: 1fr;
            }
            
            .form-options {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
        }

        /* Animation for form switching */
        .auth-form {
            display: none;
            animation: fadeIn 0.5s ease forwards;
        }

        .auth-form.active {
            display: block;
        }

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