:root {
    --primary-color: #58a6ff;
    --secondary-color: #00eaff;
    --background-color: #0b1520;
    --card-background: #11202E;
    --text-color: #cfd9e8;
}

body {
    background: #0b1520;
    color: white;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

/* NAVBAR */
nav {
    width: 100%;
    height: 70px;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0 10px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(4, 21, 46, 0.95);
    backdrop-filter: blur(10px);
    z-index: 999;
}

nav a {
    color: #cfd9e8;
    text-decoration: none;
    margin-left: 20px;
    font-size: 16px;
    position: relative;
    transition: 0.3s;
}

/* Hover Neon */
nav a:hover {
    color: #58a6ff;
}

nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 0%;
    height: 2px;
    background: #58a6ff;
    transition: 0.3s;
    opacity: 0;
    visibility: hidden;
}

nav a:hover::after {
    width: 100%;
    opacity: 1;
    visibility: visible;
}

.lang-box {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255,255,255,0.15);
    padding: 12px 18px;
    border-radius: 14px;
    backdrop-filter: blur(10px);
    color: white;
    font-size: 16px;
    width: fit-content;
    transition: all 0.3s ease;
}

.lang-box:hover {
    background: rgba(255,255,255,0.25);
    box-shadow: 0 0 10px rgba(237, 233, 233, 0.829);
    transform: translateY(-5px);
}

.lang-box img {
    width: auto;
    height: 20px;
    object-fit: contain;
    border-radius: 3px; 
}

#langLabel {
    font-weight: 500;
}

/* Select disembunyikan, tapi tetap berfungsi */
#langSwitcher {
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

/* Panah dropdown */
.lang-box::after {
    content: "▼";
    position: static;
    right: 15px;
    color: white;
    font-size: 14px;
    pointer-events: none;
}

/* CONTENT */
.content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
  padding: 60px 8%;
  background-color: var(--background-color);
  font-family: 'Inter', -apple-system, sans-serif;
  margin-top: 3rem;
}

.cer-header {
  grid-column: 1 / -1;
  text-align: center;
  margin-bottom: 40px;
}

.cer-header h1 {
  color: var(--text-color);
  font-size: 2.5rem;
  letter-spacing: -1px;
}

.cer-header p {
  color: var(--text-color);
  font-size: 1.1rem;
}

.cert-card {
  background: var(--card-background);
  border: 1px solid #30363d;
  border-radius: 20px;
  padding: 24px;
  position: relative;
  transition: all 0.4s ease;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.cert-card:has(.badge-blue):hover {
    transform: translateY(-10px);
    border-color: rgba(0, 123, 255, 0.8);
    box-shadow: 
        0 0 10px rgba(0, 123, 255, 0.6), 
        0 0 25px rgba(0, 123, 255, 0.4), 
        0 0 45px rgba(0, 123, 255, 0.2),
        inset 0 0 15px rgba(0, 123, 255, 0.2);
}

.cert-card:has(.badge-green):hover {
    transform: translateY(-10px);
    border-color: rgba(40, 167, 69, 0.8);
    box-shadow: 
        0 0 10px rgba(40, 167, 69, 0.6), 
        0 0 25px rgba(40, 167, 69, 0.4), 
        0 0 45px rgba(40, 167, 69, 0.2),
        inset 0 0 15px rgba(40, 167, 69, 0.2);
}

.badge {
  position: absolute;
  top: 20px;
  left: 20px;
  padding: 5px 14px;
  border-radius: 30px;
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  z-index: 10;
}
.badge-blue { background: #1f6feb; color: #fff; }
.badge-green { background: #238636; color: #fff; }

.cert-img-container {
  width: 100%;
  height: 200px;
  margin: 25px 0;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  border-radius: 12px;
  background: var(--card-background);
}

.cert-img-container img {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
  transition: all 0.6s ease-in-out;
}

.img-back {
  position: absolute;
  opacity: 0; 
  transform: scale(0.9);
}

.img-front {
  opacity: 1;
}

.cert-card.has-back:hover .img-front {
  opacity: 0;
  transform: scale(1.1);
}

.cert-card.has-back:hover .img-back {
  opacity: 1;
  transform: scale(1);
}

.cert-info h3 {
  color: var(--text-color);
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.status-active {
  color: #3fb950;
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 15px;
}

.cert-info p {
  color: #8b949e;
  font-size: 14px;
  line-height: 1.6;
}

/* FOOTER */
.footer {
    text-align: center;
    padding: 60px 20px;
    background: #081c31;
    font-size: 14px;
    animation: fadeIn 1s ease 0.5s forwards;
    opacity: 0;
}

.container-footer {
    max-width: 1200px;
    margin: 0 auto;
}

.footer a {
    color: #58a6ff;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer a:hover {
    color: #00eaff;
    text-decoration: underline;
}

.socialmedia {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 25px 0;
}

.socialmedia a {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(88, 166, 255, 0.1);
    transition: all 0.3s ease;
}

.socialmedia a:hover {
    background: rgba(79, 161, 255, 0.584);
    transform: translateY(-5px) scale(1.1);
}

.socialmedia svg {
    width: 20px;
    height: 20px;
    fill: #58a6ff;
    transition: fill 0.3s ease;
}

.socialmedia a:hover svg {
    fill: #00eaff;
}

.copyright {
    margin-top: 20px;
    opacity: 0.7;
    font-size: 14px;
    text-align: center
}

/* ====== Hamburger Menu ====== */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    position: absolute;
    right: 30px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1001;
    background: none;
    border: none;
    padding: 10px;
}

.hamburger span {
    width: 30px;
    height: 3.5px;
    background: white;
    border-radius: 2px;
    transition: 0.3s ease;
    transform-origin: center;
}

/* Loding Scren */
.loading-screen {
   position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 9999;
            transition: opacity 3s ease, visibility 2s ease;
}

.loading-content {
text-align: center;
color: white;
}
        
        .loader {
            width: 50px;
            height: 50px;
            border: 5px solid rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            border-top-color: white;
            animation: spin 2s ease-in-out infinite;
            margin: 0 auto 20px;
        }
        
        .loading-text {
            font-size: 1.5rem;
            opacity: 0.8;
            animation: pulse 1.5s ease-in-out infinite;
        }

.animate-on-scroll {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s ease;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

.scroll-indicator {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    z-index: 1000;
}

.scroll-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    width: 0%;
    transition: width 0.3s ease;
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 24px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    z-index: 999;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* amimasi */
@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 1; }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

@keyframes glow {
    0% { opacity: 0.5; }
    100% { opacity: 1; }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* Hp */
@media (max-width: 768px) {
    .hamburger {
    display: flex;
    position: absolute;
    right: 34px;
    top: 50%;
    transform: translateY(-50%);
  }

    .menu {
        position: fixed;
        top: 70px; 
        right: 20px;
        width: 100%;
        background: rgba(17, 17, 17, 0.95);


    .menu a.highlight {
      background: rgba(88, 166, 255, 0.12);
      color: var(--secondary-color);
      border-radius: 8px;
      outline: none;
    }

    .menu a:focus {
      outline: none;
    }
        backdrop-filter: blur(10px);
        flex-direction: column;
        text-align: center;
        padding: 0;
        gap: 18px;
        box-sizing: border-box;
        z-index: 998;
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        transition: all 0.5s ease;
        display: flex; 
    }
    
 
    .menu.active {
        max-height: 500px;
        padding: 20px 0;
        opacity: 1;
        text-align: center;
    }
    

    .menu a {
        font-size: 16px;
        padding: 12px 0;
        display: block;
        width: 100%;
        text-align: center;
        color: #cfd9e8;
    }
    
    .menu a:hover {
        background: rgba(88, 166, 255, 0.1);
    }
    

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 6px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -6px);
    }
    
    .menu-overlay {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        height: calc(100% - 70px);
        background: rgba(0, 0, 0, 0.5);
        z-index: 997;
    }
    
    .menu-overlay.active {
        display: block;
    }

      .content { 
        padding: 40px 5%; 
      }
      .cer-header h1 { 
        font-size: 1.8rem; 
      }
    
    
    /* Footer */
    .footer {
        padding: 30px 15px;
    }
    
    .socialmedia {
        gap: 15px;
    }
    
    .copyright {
        font-size: 12px;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
        font-size: 20px;
    }

    .copyright {
        margin-top: 10px;
        opacity: 0.7;
        font-size: 12px;
        text-align: center;
    }


}

@media (max-width: 512px) {

  /* ===== BODY ===== */
  body {
    overflow-x: hidden;
  }

  section {
    padding: 60px 14px;
  }

  /* ===== NAVBAR ===== */
  nav {
    height: 64px;
    padding: 0 12px;
  }

  nav a {
    margin-left: 0;
    font-size: 15px;
  }

  /* ===== LANGUAGE SWITCH ===== */
  .lang-box {
    padding: 8px 12px;
    gap: 8px;
    font-size: 13px;
  }

  .lang-box img {
    height: 16px;
  }


  /* ===== FOOTER ===== */
  .footer {
    padding: 40px 15px;
  }

  .socialmedia a {
    width: 40px;
    height: 40px;
  }

  .socialmedia svg {
    width: 18px;
    height: 18px;
  }

  /* ===== BACK TO TOP ===== */
  .back-to-top {
    width: 42px;
    height: 42px;
    font-size: 20px;
    bottom: 20px;
    right: 20px;
  }

}