:root {
            --bg-color: #f5f5f5;
            --second-bg-color: #ffffff;
            --main-color: #3f9968;
            --text-color: #333333;
            --shadow-color: rgba(0, 0, 0, .1);
            --white-color: #ffffff;
        }

        .dark-mode {
            --bg-color: #0b061f;
            --second-bg-color: #1a1532;
            --text-color: #fdfdfd;
            --shadow-color: rgba(0, 0, 0, .7);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            font-size: 62.5%;
            overflow-x: hidden;
        }

        body {
            background: var(--bg-color);
            color: var(--text-color);
            line-height: 1.6;
            font-family: 'Poppins', sans-serif;
            transition: background-color 0.3s ease, color 0.3s ease;
        }

        /* Header */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: var(--second-bg-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 2rem 5%;
            z-index: 1000;
            box-shadow: 0 2px 10px var(--shadow-color);
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }

        .header.sticky {
            background: var(--second-bg-color);
            box-shadow: 0 .1rem 1rem var(--shadow-color);
        }

        .header .logo {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--main-color);
            text-decoration: none;
        }

        /* Navbar - Desktop */
        .navbar {
            display: flex;
            align-items: center;
        }

        .navbar a {
            margin-left: 2rem;
            font-size: 1.6rem;
            color: var(--text-color);
            text-decoration: none;
            transition: 0.3s;
            font-weight: 500;
            position: relative;
        }

        .navbar a:hover,
        .navbar a.active {
            color: var(--main-color);
        }

        .navbar a.active::before {
            content: '';
            position: absolute;
            left: 0;
            bottom: -6px;
            width: 100%;
            height: .2rem;
            background: var(--main-color);
        }

        /* Header Icons */
        .header-icons {
            display: flex;
            align-items: center;
            gap: 1.5rem;
        }

        #menu-icon,
        #darkMode-icon {
            font-size: 2.5rem;
            color: var(--text-color);
            cursor: pointer;
            transition: color 0.3s ease;
        }

        #darkMode-icon:hover,
        #menu-icon:hover {
            color: var(--main-color);
        }

        /* Sembunyikan menu icon di desktop */
        #menu-icon {
            display: none;
        }

        /* Contact Hero Section */
        .contact-hero {
            margin-top: 120px;
            min-height: 30vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            background: var(--second-bg-color);
            padding: 8rem 5% 4rem;
            box-shadow: 0 2px 10px var(--shadow-color);
        }

        .contact-hero .heading {
            font-size: 4.5rem;
            margin-bottom: 1.5rem;
            color: var(--text-color);
        }

        .contact-hero .heading span {
            color: var(--main-color);
        }

        .contact-hero p {
            font-size: 1.8rem;
            color: var(--text-color);
            max-width: 700px;
            opacity: 0.9;
        }

        /* Contact Section */
        .contact-section {
            background: var(--bg-color);
            padding: 5rem 5% 8rem;
            min-height: calc(100vh - 120px - 80px);
        }

        .contact-section .heading {
            text-align: center;
            font-size: 4rem;
            margin-bottom: 3rem;
            color: var(--text-color);
            position: relative;
        }

        .contact-section .heading::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background: var(--main-color);
            border-radius: 2px;
        }

        .contact-section .heading span {
            color: var(--main-color);
        }

        .contact-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 3rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        /* Contact Cards */
        .contact-card {
            background: var(--second-bg-color);
            border-radius: 1.5rem;
            box-shadow: 0 5px 20px var(--shadow-color);
            padding: 3rem;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: 1px solid transparent;
            position: relative;
            overflow: hidden;
        }

        .contact-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--main-color), #3f9968);
        }

        .contact-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 35px var(--shadow-color);
            border-color: var(--main-color);
        }

        .contact-card h4 {
            font-size: 2.2rem;
            margin-bottom: 2rem;
            color: var(--text-color);
            text-align: center;
            font-weight: 600;
        }

        .contact-card h4 span {
            color: var(--main-color);
        }

        /* Info Cards */
        .info-card {
            background: var(--bg-color);
            border-radius: 1rem;
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            transition: transform 0.3s ease;
            border-left: 4px solid var(--main-color);
        }

        .info-card:hover {
            transform: translateX(5px);
        }

        .info-card i {
            font-size: 2.5rem;
            color: var(--main-color);
            margin-right: 1.5rem;
            min-width: 30px;
        }

        .info-card p {
            margin: 0;
            font-size: 1.4rem;
            color: var(--text-color);
        }

        .info-card a {
            color: var(--text-color);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .info-card a:hover {
            color: var(--main-color);
        }

        /* Service Cards */
        .service-card {
            background: var(--bg-color);
            border-radius: 1rem;
            padding: 2rem;
            margin-bottom: 1.5rem;
            text-align: center;
            transition: transform 0.3s ease;
            border: 2px solid transparent;
        }

        .service-card:hover {
            transform: translateY(-5px);
            border-color: var(--main-color);
        }

        .service-card h5 {
            font-size: 1.8rem;
            margin-bottom: 1rem;
            color: var(--text-color);
            font-weight: 600;
        }

        .service-card p {
            font-size: 1.6rem;
            color: var(--main-color);
            font-weight: 600;
            margin: 0;
        }

        /* Contact Form */
        .contact-form {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .form-group {
            display: flex;
            flex-direction: column;
        }

        .contact-form input,
        .contact-form textarea {
            padding: 1.5rem;
            border: 2px solid var(--shadow-color);
            border-radius: 0.8rem;
            font-size: 1.4rem;
            background: var(--bg-color);
            color: var(--text-color);
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
            font-family: 'Poppins', sans-serif;
        }

        .contact-form input:focus,
        .contact-form textarea:focus {
            outline: none;
            border-color: var(--main-color);
            box-shadow: 0 0 0 3px rgba(63, 99, 153, 0.1);
        }

        .contact-form textarea {
            resize: vertical;
            min-height: 120px;
        }

        .submit-btn {
            padding: 1.5rem 2rem;
            background: var(--main-color);
            color: var(--white-color);
            border: none;
            border-radius: 0.8rem;
            font-size: 1.6rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            border: 2px solid transparent;
            margin-top: 1rem;
        }

        .submit-btn:hover {
            background: transparent;
            color: var(--main-color);
            border-color: var(--main-color);
            transform: translateY(-2px);
        }

        /* Social Links */
        .social-links {
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            margin-top: 2rem;
            flex-wrap: wrap;
        }

        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 4.5rem;
            height: 4.5rem;
            background: var(--main-color);
            color: var(--white-color);
            border-radius: 50%;
            font-size: 2rem;
            transition: all 0.3s ease;
            text-decoration: none;
        }

        .social-links a:hover {
            background: var(--text-color);
            color: var(--main-color);
            transform: translateY(-3px);
        }

        /* Footer */
        .footer {
            background: var(--main-color);
            color: var(--white-color);
            padding: 2rem 5%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            box-shadow: 0 -2px 8px var(--shadow-color);
            min-height: 80px;
        }

        .footer-text p {
            font-size: 1.6rem;
            color: var(--white-color);
        }

        .footer-iconTop a {
            display: inline-flex;
            justify-content: center;
            align-items: center;
            padding: .8rem;
            background: var(--white-color);
            border-radius: .8rem;
            border: .2rem solid var(--white-color);
            outline: .2rem solid transparent;
            transition: .5s ease;
            width: 4.5rem;
            height: 4.5rem;
        }

        .footer-iconTop a i {
            font-size: 2.4rem;
            color: var(--main-color);
        }

        .footer-iconTop a:hover {
            outline-color: var(--white-color);
            transform: translateY(-2px);
            background: var(--main-color);
        }
        .footer-iconTop a:hover i {
            color: var(--white-color);
        }

        /* Floating Back Button */
        .floating-back-btn {
            position: fixed;
            bottom: 25px;
            right: 25px;
            width: 55px;
            height: 55px;
            background: var(--main-color);
            color: white;
            border-radius: 50%;
            display: none;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            box-shadow: 0 6px 20px var(--shadow-color);
            text-decoration: none;
            z-index: 1000;
            transition: all 0.3s ease;
            opacity: 0;
            transform: translateY(20px);
            border: 2px solid var(--white-color);
        }

        .floating-back-btn.show {
            display: flex;
            opacity: 1;
            transform: translateY(0);
        }

        .floating-back-btn:hover {
            background: #3f9968;
            transform: translateY(-3px) scale(1.05);
        }

        
        @media (max-width: 991px) {
            .header {
                padding: 1.5rem 4%;
            }

            .contact-hero {
                margin-top: 80px;
                padding: 6rem 4% 3rem;
            }

            .contact-hero .heading {
                font-size: 4rem;
            }

            .contact-section {
                padding: 4rem 4% 6rem;
            }

            .contact-section .heading {
                font-size: 3.5rem;
            }
        }

        /* Mobile Devices (max-width: 768px) */
        @media (max-width: 768px) {
            /* Tampilkan menu icon di mobile */
            #menu-icon {
                display: block;
                font-size: 3rem;
            }

            /* Sembunyikan navbar default di mobile */
            .navbar {
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                padding: 1rem 3%;
                background: var(--second-bg-color);
                border-top: .1rem solid rgba(0, 0, 0, 0.1);
                box-shadow: 0 .5rem 1rem var(--shadow-color);
                display: none;
                flex-direction: column;
                transition: all 0.3s ease;
            }

            /* Tampilkan navbar ketika active */
            .navbar.active {
                display: flex;
            }

            /* Style untuk link navbar di mobile */
            .navbar a {
                display: block;
                font-size: 2rem;
                margin: 1.5rem 0;
                text-align: center;
                padding: 1rem;
                border-radius: 0.5rem;
                transition: all 0.3s ease;
                color: var(--text-color);
                border-bottom: 1px solid rgba(0, 0, 0, 0.1);
            }

            /* Hilangkan border bottom untuk item terakhir */
            .navbar a:last-child {
                border-bottom: none;
            }

            /* Hover effect untuk mobile */
            .navbar a:hover {
                background: var(--main-color);
                color: var(--white-color);
                transform: translateX(5px);
            }

            /* Active state untuk mobile */
            .navbar a.active {
                background: var(--main-color);
                color: var(--white-color);
            }

            /* Hilangkan pseudo-element active di mobile */
            .navbar a.active::before {
                display: none;
            }

            .contact-hero {
                margin-top: 70px;
                padding: 5rem 4% 2rem;
                min-height: 25vh;
            }

            .contact-hero .heading {
                font-size: 3.5rem;
            }

            .contact-hero p {
                font-size: 1.5rem;
            }

            .contact-section {
                padding: 3rem 4% 5rem;
            }

            .contact-section .heading {
                font-size: 3rem;
                margin-bottom: 2rem;
            }

            .contact-container {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .contact-card {
                padding: 2.5rem;
            }

            .footer {
                flex-direction: column;
                text-align: center;
                gap: 1.5rem;
                padding: 2rem 4%;
            }

            .footer-text {
                order: 2;
            }

            .footer-iconTop {
                order: 1;
                width: 100%;
                justify-content: center;
            }
        }

        /* Small Mobile Devices (max-width: 450px) */
        @media (max-width: 450px) {
            html {
                font-size: 55%;
            }

            .header {
                padding: 1.2rem 3%;
            }

            .contact-hero {
                margin-top: 60px;
                padding: 4rem 3% 2rem;
            }

            .contact-hero .heading {
                font-size: 3rem;
            }

            .contact-hero p {
                font-size: 1.4rem;
            }

            .contact-section {
                padding: 2rem 3% 4rem;
            }

            .contact-section .heading {
                font-size: 2.5rem;
            }

            .contact-container {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

            .contact-card {
                padding: 2rem;
                margin: 0 0.5rem;
            }

            .navbar {
                padding: 1rem 3%;
            }

            .navbar a {
                font-size: 1.8rem;
                margin: 1rem 0;
                padding: 1.5rem;
            }

            .footer {
                padding: 1.5rem 3%;
            }

            .footer-text p {
                font-size: 1.4rem;
            }

            .floating-back-btn {
                bottom: 20px;
                right: 20px;
                width: 50px;
                height: 50px;
                font-size: 22px;
            }
        }

        .login-button {
            display: inline-block;
            background-color: #998d4b;
            color: white;
            padding: 1rem 2rem;
            border-radius: 0.8rem;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.4rem;
            transition: 0.3s;
        }

        .login-button:hover {
            background-color: #754c1e;
            transform: translateY(-2px);
        }

    /*dark mode untuk bintang */
    .dark-mode body,
    .dark-mode .contact-section {
    background-color: var(--bg-color); 
    background-image: 
        radial-gradient(1px 1px at 10% 30%, white, transparent),
        radial-gradient(1px 1px at 80% 70%, white, transparent),
        radial-gradient(2px 2px at 30% 80%, white, transparent),
        radial-gradient(2px 2px at 50% 10%, white, transparent),
        radial-gradient(3px 3px at 70% 40%, white, transparent),
        radial-gradient(3px 3px at 20% 50%, white, transparent);
    background-size: 
        600px 600px, 
        600px 600px,
        400px 400px, 
        400px 400px,
        200px 200px, 
        200px 200px;
    background-repeat: repeat;
    animation: moveStars 120s linear infinite;

    }

    .dark-mode .header,
    .dark-mode .contact-hero,
    .dark-mode .contact-card,
    .dark-mode .navbar {
    background: var(--second-bg-color); 
    animation: none; 

    }

    @keyframes moveStars {

    from {

        background-position: 0 0, 0 0, 0 0, 0 0, 0 0, 0 0;

    } 

    to {
        background-position: 
            -10000px 2000px,  /* Lapisan 1 */
            -10000px 2000px,
            -15000px 3000px,  /* Lapisan 2 */
            -15000px 3000px,
            -25000px 5000px,  /* Lapisan 3 */
            -25000px 5000px;
        }

    }