:root {
            --primary: #2c3e50;
            --secondary: #2b41c0;
            --accent: #3498db;
            --light: #f8f9fa;
            --dark: #2c3e50;
        }
        
        body {
            font-family: 'Poppins', sans-serif;
            overflow-x: hidden;
            color: #333;
            background-color: #f8f9fa;
        }
        
        .navbar {
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            padding: 15px 0;
            background-color: white !important;
        }
        
        .navbar-brand {
            font-weight: 700;
            color: var(--primary);
        }
        
        .navbar-brand span {
            color: var(--secondary);
        }
        
        .nav-link {
            font-weight: 500;
            margin: 0 10px;
            color: var(--dark);
        }
        
        .nav-link:hover {
            color: var(--secondary);
        }
        
        .btn-primary {
            background-color: var(--secondary);
            border-color: var(--secondary);
            padding: 10px 25px;
            border-radius: 30px;
            font-weight: 600;
        }
        
        .btn-primary:hover {
            background-color: #2b41c0;
            border-color: #2b41c0;
        }
        
        .page-header {
            padding: 120px 0 80px;
            background: linear-gradient(rgba(44, 62, 80, 0.8), rgba(44, 62, 80, 0.9)), url('https://images.unsplash.com/photo-1523240795612-9a054b0db644?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            text-align: center;
        }
        
        .section-title {
            position: relative;
            margin-bottom: 40px;
            font-weight: 700;
            color: var(--primary);
        }
        
        .section-title:after {
            content: '';
            display: block;
            width: 50px;
            height: 3px;
            background: var(--secondary);
            margin-top: 15px;
        }
        
        .section-title.text-center:after {
            margin-left: auto;
            margin-right: auto;
        }
        
        .certificate-card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            background: white;
        }
        
        .certificate-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
        }
        
        .certificate-img {
            width: 100%;
            height: 250px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        
        .certificate-card:hover .certificate-img {
            transform: scale(1.03);
        }
        
        .certificate-overlay {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.7);
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        
        .certificate-card:hover .certificate-overlay {
            opacity: 1;
        }
        
        .view-btn {
            background: var(--secondary);
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 30px;
            font-weight: 500;
            transition: all 0.3s ease;
        }
        
        .view-btn:hover {
            background: white;
            color: var(--secondary);
            transform: scale(1.05);
        }
        
        .modal-content {
            border-radius: 15px;
            overflow: hidden;
        }
        
        .modal-img {
            width: 100%;
            border-radius: 5px;
        }
        
        .category-filter {
            margin-bottom: 30px;
        }
        
        .filter-btn {
            background: white;
            border: 2px solid var(--primary);
            color: var(--primary);
            padding: 8px 20px;
            border-radius: 30px;
            margin: 0 5px 10px;
            font-weight: 500;
            transition: all 0.3s ease;
        }
        
        .filter-btn:hover, .filter-btn.active {
            background: var(--primary);
            color: white;
        }
        
        .certificate-category {
            font-size: 0.9rem;
            color: var(--secondary);
            font-weight: 600;
            margin-bottom: 10px;
        }
        
        .back-btn {
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s ease;
        }
        
        .back-btn:hover {
            color: var(--secondary);
        }
        
        .footer {
            background-color: var(--dark);
            color: white;
            padding: 60px 0 30px;
            margin-top: 80px;
        }
        
        .footer-title {
            font-weight: 600;
            margin-bottom: 25px;
            position: relative;
        }
        
        .footer-title:after {
            content: '';
            display: block;
            width: 30px;
            height: 2px;
            background: var(--secondary);
            margin-top: 10px;
        }
        
        .footer-links {
            list-style: none;
            padding: 0;
        }
        
        .footer-links li {
            margin-bottom: 10px;
        }
        
        .footer-links a {
            color: #adb5bd;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-links a:hover {
            color: white;
        }
        
        .social-icons a {
            display: inline-block;
            width: 40px;
            height: 40px;
            line-height: 40px;
            text-align: center;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            color: white;
            margin-right: 10px;
            transition: all 0.3s ease;
        }
        
        .social-icons a:hover {
            background: var(--secondary);
            transform: translateY(-3px);
        }
        
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            margin-top: 30px;
        }
        
        .logo-text {
            font-size: 28px;
            font-weight: 700;
        }
        
        .img-container {
            position: relative;
            overflow: hidden;
            border-radius: 10px 10px 0 0;
        }

        /* ==================== ANIMASI UMUM ==================== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Animasi untuk elemen yang muncul dari kiri */
.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Animasi untuk elemen yang muncul dari kanan */
.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Animasi untuk scaling */
.scale-in {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.scale-in.visible {
    opacity: 1;
    transform: scale(1);
}

/* Animasi untuk filter buttons */
.filter-btn {
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.filter-btn:after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%);
    transform-origin: 50% 50%;
}

.filter-btn:hover:after {
    animation: ripple 1s ease-out;
}

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 1;
    }
    20% {
        transform: scale(25, 25);
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: scale(40, 40);
    }
}

/* Animasi untuk navbar */
.navbar {
    transition: all 0.3s ease;
}

.navbar-brand {
    transition: all 0.3s ease;
}

.nav-link {
    position: relative;
}

.nav-link:after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--secondary);
    transition: width 0.3s ease;
}

.nav-link:hover:after {
    width: 100%;
}

/* Animasi untuk social icons */
.social-icons a {
    transition: all 0.3s ease;
}

.social-icons a:hover {
    transform: translateY(-5px);
}

/* Animasi untuk page header */
.page-header {
    position: relative;
    overflow: hidden;
}

.page-header:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, rgba(43, 65, 192, 0.7), rgba(52, 152, 219, 0.7));
    opacity: 0;
    transition: opacity 1s ease;
}

.page-header.loaded:before {
    opacity: 1;
}

.page-header h1, .page-header p {
    opacity: 0;
    transform: translateY(20px);
    transition: all 1s ease;
}

.page-header.loaded h1, .page-header.loaded p {
    opacity: 1;
    transform: translateY(0);
}

/* Animasi untuk breadcrumb */
.breadcrumb {
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.8s ease;
}

.breadcrumb.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Animasi untuk certificate cards */
.certificate-item {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.certificate-item.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Animasi untuk modal */
.modal-content {
    transform: scale(0.9);
    opacity: 0;
    transition: all 0.3s ease;
}

.modal.show .modal-content {
    transform: scale(1);
    opacity: 1;
}

/* Animasi untuk filter section */
.category-filter {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.8s ease;
}

.category-filter.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Animasi untuk section title */
.section-title {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.8s ease;
}

.section-title.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Animasi untuk certificate overlay */
.certificate-overlay {
    transition: opacity 0.5s ease;
}

/* Animasi untuk certificate image */
.certificate-img {
    transition: transform 0.5s ease;
}

/* Animasi untuk view button */
.view-btn {
    transition: all 0.3s ease;
    transform: translateY(20px);
    opacity: 0;
}

.certificate-card:hover .view-btn {
    transform: translateY(0);
    opacity: 1;
}

/* Animasi berurutan untuk certificate items */
.certificate-item:nth-child(1) { transition-delay: 0.1s; }
.certificate-item:nth-child(2) { transition-delay: 0.2s; }
.certificate-item:nth-child(3) { transition-delay: 0.3s; }
.certificate-item:nth-child(4) { transition-delay: 0.4s; }
.certificate-item:nth-child(5) { transition-delay: 0.5s; }
.certificate-item:nth-child(6) { transition-delay: 0.6s; }