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

:root {
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --secondary-color: #06b6d4;
  --accent-color: #f59e0b;
  --background-dark: #0f172a;
  --background-darker: #020617;
  --surface-dark: #1e293b;
  --surface-light: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --border-color: #475569;
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);

  --gradient-primary: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  --gradient-accent: linear-gradient(135deg, var(--accent-color), #ef4444);
  --gradient-bg: linear-gradient(
    135deg,
    var(--background-dark),
    var(--background-darker)
  );

  --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.15);
  --shadow-medium: 0 8px 30px rgba(0, 0, 0, 0.2);
  --shadow-strong: 0 15px 60px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);

  --font-primary: "Inter", sans-serif;
  --font-display: "Space Grotesk", sans-serif;

  --container-padding: 2rem;
  --section-padding: 6rem 0;
  --element-spacing: 2rem;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  background: var(--gradient-bg);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

.bg-animation {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(
      circle at 20% 30%,
      rgba(99, 102, 241, 0.1) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 80% 70%,
      rgba(6, 182, 212, 0.1) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 60% 20%,
      rgba(245, 158, 11, 0.05) 0%,
      transparent 50%
    );
  animation: backgroundMove 20s ease-in-out infinite;
  z-index: -2;
}

@keyframes backgroundMove {
  0%,
  100% {
    transform: translate(0, 0) rotate(0deg);
  }
  33% {
    transform: translate(-20px, -10px) rotate(1deg);
  }
  66% {
    transform: translate(20px, 10px) rotate(-1deg);
  }
}

/* Floating Elements */
.floating-elements {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
}

.floating-element {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--primary-color);
  border-radius: 50%;
  opacity: 0.6;
  animation: float 15s infinite linear;
}

.floating-element:nth-child(1) {
  left: 10%;
  animation-delay: 0s;
  animation-duration: 20s;
}

.floating-element:nth-child(2) {
  left: 30%;
  animation-delay: -5s;
  animation-duration: 25s;
}

.floating-element:nth-child(3) {
  left: 50%;
  animation-delay: -10s;
  animation-duration: 18s;
}

.floating-element:nth-child(4) {
  left: 70%;
  animation-delay: -15s;
  animation-duration: 22s;
}

.floating-element:nth-child(5) {
  left: 90%;
  animation-delay: -20s;
  animation-duration: 28s;
}

@keyframes float {
  0% {
    transform: translateY(100vh) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 0.6;
  }
  90% {
    opacity: 0.6;
  }
  100% {
    transform: translateY(-100px) rotate(360deg);
    opacity: 0;
  }
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Header */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 1000;
  transition: all 0.3s ease;
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo h1 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.logo-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-dot {
  color: var(--accent-color);
}

/* Navigation */
nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: all 0.3s ease;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background: var(--glass-bg);
  transform: translateY(-2px);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  background: var(--primary-color);
  border-radius: 50%;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  transition: all 0.3s ease;
}

/* Main Content */
main {
  margin-top: 80px;
}

/* Section Styling */
section {
  padding: var(--section-padding);
  max-width: 1200px;
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.section-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 4rem;
}

.section-number {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--primary-color);
  background: var(--glass-bg);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  border: 1px solid var(--glass-border);
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.section-line {
  flex: 1;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 1px;
}

/* Hero Section */
.hero-section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  width: 100%;
  max-width: 1200px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.hero-greeting {
  display: block;
  font-size: 1.2rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.hero-name {
  display: block;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.hero-profession {
  display: block;
  color: var(--accent-color);
  font-size: 1.8rem;
}

.hero-description {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 700px;
  text-align: center;
  margin-left: auto;
  margin-right: auto;
  padding: 0 1rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s ease;
  border: 2px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-medium);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-outline:hover {
  background: var(--glass-bg);
  border-color: var(--primary-color);
  transform: translateY(-3px);
}

/* Hero Visual */
.hero-visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 1.5rem;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Hero Visual */
.hero-visual {
  display: grid !important;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 1.5rem;
  align-items: center;
  padding: 0 20px;
  max-width: 1200px;
  margin: 0 auto;
}

/* Hero Card */
.hero-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 2rem;
  text-align: center;
  transition: all 0.3s ease;
  cursor: pointer;
  width: 100%;
}

.hero-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-glow);
}

.hero-visual .hero-card:nth-child(1) {
  grid-column: 1;
  grid-row: 1;
}
.hero-visual .hero-card:nth-child(2) {
  grid-column: 2;
  grid-row: 1;
}
.hero-visual .hero-card:nth-child(3) {
  grid-column: 1 / -1;
  grid-row: 2;
}

.hero-card i {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.hero-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.hero-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
}

.scroll-arrow {
  animation: bounce 2s infinite;
  color: var(--primary-color);
  font-size: 1.5rem;
}

@keyframes bounce {
  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  60% {
    transform: translateY(-5px);
  }
}

/* About Section */
.about-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-intro {
  font-size: 1.3rem;
  line-height: 1.8;
  margin-bottom: 3rem;
  color: var(--text-secondary);
}

.highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 600;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.stat-item {
  text-align: center;
  padding: 1.5rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  transition: all 0.3s ease;
}

.stat-item:hover {
  transform: translateY(-5px);
  background: var(--surface-dark);
}

.stat-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.about-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.about-avatar {
  position: relative;
  width: 250px;
  height: 250px;
}

.avatar-ring {
  position: absolute;
  width: 100%;
  height: 100%;
  border: 3px solid var(--primary-color);
  border-radius: 50%;
  border-top-color: transparent;
  border-right-color: transparent;
  animation: rotate 3s linear infinite;
}

.avatar-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 200px;
  height: 200px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-shadow: var(--shadow-strong);
}

.avatar-content img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 10%;
  border-radius: 50%;
}
.avatar-content:hover img {
  transform: scale(0.9);
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* Gallery Styling */
.certificate-gallery,
.activity-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

/* Certificate Cards */
.certificate,
.activity {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.3s ease;
  position: relative;
}

.certificate:hover,
.activity:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-strong);
}

.certificate.featured,
.activity.featured {
  border: 2px solid var(--primary-color);
  box-shadow: var(--shadow-glow);
}

.certificate.special {
  border: 2px solid var(--accent-color);
  box-shadow: 0 0 40px rgba(245, 158, 11, 0.3);
}

.certificate-badge,
.activity-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--gradient-primary);
  color: white;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  font-size: 1rem;
}

.certificate.special .certificate-badge {
  background: var(--gradient-accent);
}

.certificate-image,
.activity-image {
  position: relative;
  height: 200px;
  background: var(--surface-dark);
  overflow: hidden;
}

.certificate-images {
  position: relative;
  height: 200px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  background: var(--surface-dark);
}

.certificate-image img,
.activity-image img,
.certificate-images img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: all 0.3s ease;
}

.certificate-overlay,
.activity-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(99, 102, 241, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all 0.3s ease;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
}

.certificate:hover .certificate-overlay,
.activity:hover .activity-overlay {
  opacity: 1;
}

.certificate-content,
.activity-content {
  padding: 1.5rem;
}

.certificate-content h3,
.activity-content h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.certificate-meta,
.activity-details {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.certificate-issuer,
.certificate-date,
.activity-location,
.activity-date {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.certificate-content p,
.activity-content p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.certificate-tags,
.activity-type {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tag {
  background: var(--surface-light);
  color: var(--text-secondary);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  border: 1px solid var(--border-color);
}

.activity-type {
  align-items: center;
  gap: 0.5rem;
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 1rem;
}

/* Contact Section */
.contact-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.contact-text {
  margin-bottom: 4rem;
}

.contact-text h3 {
  font-family: var(--font-display);
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.contact-text p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.contact-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 2rem;
  text-align: center;
  transition: all 0.3s ease;
}

.contact-item:hover {
  transform: translateY(-10px);
  background: var(--surface-dark);
  box-shadow: var(--shadow-medium);
}

.contact-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-size: 1.5rem;
  color: white;
}

.contact-info h4 {
  font-family: var(--font-display);
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

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

.contact-info a:hover {
  color: var(--primary-color);
}

/* Footer */
footer {
  background: var(--background-darker);
  border-top: 1px solid var(--border-color);
  padding: 3rem 0;
  margin-top: 4rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-text p {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.footer-subtitle {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  gap: 2rem;
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-link:hover {
  color: var(--primary-color);
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  background: var(--gradient-primary);
  border: none;
  border-radius: 50%;
  color: white;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 1000;
  box-shadow: var(--shadow-medium);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-strong);
}

/* Tablet dan Desktop kecil */
@media (max-width: 1024px) {
  :root {
    --container-padding: 1.5rem;
    --section-padding: 4rem 0;
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }

  .hero-title {
    font-size: 2.8rem;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }

  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }

  .certificate-gallery,
  .activity-gallery {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
}

/* Tablet (max-width: 768px) */
@media (max-width: 768px) {
  :root {
    --container-padding: 1rem;
    --section-padding: 3rem 0;
  }

  /* Header Navigation */
  .header-content {
    height: 70px;
    padding: 0 1rem;
  }

  .menu-toggle {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
  }

  .menu-toggle:hover {
    background: var(--surface-dark);
    transform: scale(1.05);
  }

  .menu-toggle span {
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
  }

  .menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }

  nav {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(20px);
    transform: translateY(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-bottom: 1px solid var(--glass-border);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    max-height: calc(100vh - 70px);
    overflow-y: auto;
  }

  nav.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  nav ul {
    display: flex;
    flex-direction: column;
    list-style: none;
    padding: 1.5rem;
    gap: 0.5rem;
    margin: 0;
  }

  .nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 1rem 1.5rem;
    border-radius: 12px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    min-height: 56px;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s ease;
  }

  .nav-link:hover,
  .nav-link.active {
    background: var(--surface-dark);
    color: var(--text-primary);
    transform: translateX(8px);
    border-color: var(--primary-color);
  }

  .nav-link i {
    font-size: 1.2rem;
    width: 20px;
  }

  .certificate-date,
  .certificate-issuer {
    font-size: 0.6rem;
  }

  /* Main Content Adjustment */
  main {
    margin-top: 70px;
  }

  /* Hero Section */
  .hero-section {
    padding: 2rem 0;
    min-height: calc(100vh - 70px);
  }

  .hero-title {
    font-size: 2.2rem;
    line-height: 1.2;
  }

  .hero-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    text-align: center;
    padding: 0.1rem;
    margin-left: auto;
    margin-right: auto;
    max-width: 80%;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }

  .btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
    padding: 1rem 2rem;
    font-size: 1rem;
  }

  .hero-visual {
    display: flex;
    justify-content: center;
    gap: 1rem;
    padding: 0 1rem;
    flex-wrap: wrap;
  }

  .hero-card {
    flex: 1 1 calc(50% - 0.5rem);
    min-width: 200px;
    padding: 1.5rem;
  }

  .hero-card h3 {
    font-size: 1.1rem;
  }

  .hero-card p {
    font-size: 0.9rem;
  }

  /* Scroll Indicator */
  .scroll-indicator {
    display: flex;
    justify-content: center;
    padding: 1rem 0;
  }

  .scroll-arrow {
    font-size: 1.5rem;
    color: var(--text-secondary);
    animation: bounce 1.5s infinite;
  }

  @keyframes bounce {
    0%,
    20%,
    50%,
    80%,
    100% {
      transform: translateY(0);
    }
    40% {
      transform: translateY(-10px);
    }
    60% {
      transform: translateY(-5px);
    }
  }

  /* Section Headers */
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 2.5rem;
  }

  .section-number {
    font-size: 1.5rem;
    padding: 0.5rem 1rem;
  }

  .section-header h2 {
    font-size: 2rem;
  }

  .section-line {
    width: 100%;
    height: 2px;
  }

  /* About Section */
  .about-intro {
    font-size: 1.1rem;
    margin-bottom: 2rem;
  }
  .about-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    padding: 0 1rem;
  }
  .about-text {
    order: 2;
  }
  .about-visual {
    order: 1;
    text-align: center;
    margin-bottom: 1rem;
  }
  .highlight {
    background-color: rgba(0, 196, 255, 0.2);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
  }

  .stats-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
  }

  .stat-item {
    flex: 1 1 calc(33.33% - 0.5rem);
    min-width: 120px;
    padding: 1.5rem;
    text-align: center;
  }

  .stat-number {
    font-size: 2rem;
  }

  .stat-label {
    font-size: 0.9rem;
  }

  .about-avatar {
    width: 200px;
    height: 200px;
    margin: 0 auto;
  }

  .avatar-content {
    width: 160px;
    height: 160px;
    font-size: 3rem;
  }

  /* Gallery */
  .certificate-gallery {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    padding: 0 1rem;
  }

  .activity-gallery {
    grid-template-columns: repeat(2, 1fr);
  }

  .certificate {
    display: flex;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s ease;
  }
  .activity {
    margin-bottom: 0;
  }
  .certificate-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: #ffd700;
    color: #000;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.9rem;
  }

  .certificate:hover {
    transform: translateY(-5px);
  }
  .certificate-image {
    position: relative;
    overflow: hidden;
    height: 150px;
  }

  .certificate-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
  }

  .certificate-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s ease;
  }

  .certificate-image:hover .certificate-overlay {
    opacity: 1;
  }

  .certificate-overlay i {
    font-size: 2rem;
    color: #fff;
    cursor: pointer;
  }

  .certificate-content {
    padding: 1.25rem;
    flex-grow: 1;
  }

  .certificate-content h3 {
    font-size: 0.8rem;
    margin-bottom: 0.5rem;
    color: #e0e0e0;
  }

  .certificate-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
    color: #a3a3a3;
  }

  .certificate-meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
  }

  .certificate-content p {
    font-size: 0.7rem;
    margin-bottom: 1rem;
    line-height: 1.5;
    color: #d1d5db;
  }

  .certificate-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
  }

  .certificate-image {
    position: relative;
    overflow: hidden;
  }

  .certificate-image img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
  }

  .certificate-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s ease;
  }

  .certificate-image:hover .certificate-overlay {
    opacity: 1;
  }

  .certificate-overlay i {
    font-size: 2rem;
    color: #fff;
    cursor: pointer;
  }

  .activity-content p {
    font-size: 0.7rem;
  }
  .activity-content h3 {
    font-size: 0.8rem;
  }
  .activity-location,
  .activity-date {
    font-size: 0.8rem;
  }

  .certificate-content {
    padding: 1.25rem;
    flex-grow: 1;
  }

  .certificate-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
    color: #a3a3a3;
  }

  .certificate-meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
  }

  .certificate-content p {
    text-align: left;
    hyphens: auto;
  }

  .certificate-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
  }

  .tag {
    background: rgba(0, 196, 255, 0.2);
    color: #00c4ff;
    padding: 0.25rem 0.75rem;
    border-radius: 9px;
    font-size: 0.55rem;
  }
  .certificate-content {
    padding: 1.25rem;
  }
  .activity-content {
    padding: 1.25rem;
  }

  /* Contact Section */
  .contact-text h3 {
    font-size: 1.8rem;
  }

  .contact-text p {
    font-size: 1.1rem;
  }

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

  .contact-item {
    padding: 1.5rem;
  }

  /* Footer */
  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: 1.5rem;
  }

  .footer-links {
    justify-content: center;
    gap: 1.5rem;
  }

  /* Back to Top */
  .back-to-top {
    bottom: 1.5rem;
    right: 1.5rem;
    width: 45px;
    height: 45px;
  }
}

/* Ponsel (max-width: 480px) */
@media (max-width: 480px) {
  :root {
    --container-padding: 0.75rem;
    --section-padding: 2rem 0;
  }

  /* Header */
  .header-content {
    height: 60px;
    padding: 0 0.75rem;
  }

  .logo h1 {
    font-size: 1.3rem;
  }

  .menu-toggle {
    width: 40px;
    height: 40px;
  }

  .menu-toggle span {
    width: 18px;
  }

  /* Navigation */
  nav {
    top: 60px;
    max-height: calc(100vh - 60px);
  }

  nav ul {
    padding: 1rem;
    gap: 0.5rem;
  }

  .nav-link {
    padding: 0.75rem 1rem;
    min-height: 48px;
    font-size: 0.9rem;
  }

  /* Main Content */
  main {
    margin-top: 60px;
  }

  /* Hero Section */
  .hero-section {
    min-height: calc(100vh - 60px);
    padding: 1.5rem 0;
  }

  .hero-title {
    font-size: 1.8rem;
    line-height: 1.3;
  }

  .hero-description {
    font-size: 1rem;
    margin-bottom: 1.5rem;
    text-align: center;
  }

  .hero-buttons {
    gap: 0.75rem;
  }

  .btn {
    padding: 0.875rem 1.5rem;
    font-size: 0.9rem;
    max-width: 250px;
  }

  .hero-visual {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    padding: 0 0.75rem;
    flex-wrap: wrap;
  }

  .hero-card {
    flex: 1 1 100%;
    min-width: 180px;
    padding: 1.25rem;
  }

  .hero-card i {
    font-size: 2rem;
  }

  .hero-card h3 {
    font-size: 1rem;
  }

  .hero-card p {
    font-size: 0.85rem;
  }

  /* Scroll Indicator */
  .scroll-indicator {
    bottom: 1rem;
  }

  .scroll-arrow {
    font-size: 1.2rem;
  }

  /* Section Headers */
  .section-header {
    margin-bottom: 2rem;
  }

  .section-header h2 {
    font-size: 1.6rem;
  }

  /* About Section */
  .about-intro {
    font-size: 1rem;
    line-height: 1.6;
  }

  .stat-item {
    padding: 1.25rem;
  }

  .stat-number {
    font-size: 1.8rem;
  }

  .stat-label {
    font-size: 0.8rem;
  }

  .about-avatar {
    width: 180px;
    height: 180px;
  }

  .avatar-content {
    width: 140px;
    height: 140px;
    font-size: 2.5rem;
  }

  /* Gallery */
  .certificate-gallery,
  .activity-gallery {
    gap: 1rem;
  }

  .certificate-content,
  .activity-content {
    padding: 1rem;
  }

  .certificate-content h3,
  .activity-content h3 {
    font-size: 1.1rem;
  }

  .certificate-meta,
  .activity-details {
    gap: 0.5rem;
    margin-bottom: 0.75rem;
  }

  .certificate-issuer,
  .certificate-date,
  .activity-location,
  .activity-date {
    font-size: 0.8rem;
  }

  .certificate-content p,
  .activity-content p {
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
  }

  .tag {
    font-size: 0.7rem;
    padding: 0.2rem 0.6rem;
  }

  /* Contact Section */
  .contact-text h3 {
    font-size: 1.5rem;
  }

  .contact-text p {
    font-size: 1rem;
  }

  .contact-grid {
    gap: 1rem;
  }

  .contact-item {
    padding: 1.25rem;
  }

  .contact-icon {
    width: 50px;
    height: 50px;
    font-size: 1.3rem;
  }

  .contact-info h4 {
    font-size: 1rem;
  }

  .contact-info a {
    font-size: 0.9rem;
  }

  /* Footer */
  .footer-content {
    padding: 0 0.75rem;
  }

  .footer-links {
    gap: 1rem;
  }

  .footer-link {
    font-size: 0.9rem;
  }

  /* Back to Top */
  .back-to-top {
    bottom: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
}

/* Desktop dan Tablet besar */
@media (min-width: 769px) {
  .menu-toggle {
    display: none;
  }

  nav {
    position: static;
    transform: none;
    background: transparent;
    backdrop-filter: none;
    border: none;
    opacity: 1;
    visibility: visible;
    max-height: none;
    overflow: visible;
  }

  nav ul {
    flex-direction: row;
    padding: 0;
    gap: 2rem;
  }

  .nav-link {
    justify-content: flex-start;
    padding: 0.5rem 1rem;
    background: transparent;
    border: none;
    min-height: auto;
    font-size: 0.95rem;
  }

  .nav-link:hover,
  .nav-link.active {
    transform: translateY(-2px);
    background: var(--glass-bg);
    border: none;
  }

  .nav-link i {
    font-size: 1rem;
  }

  .hero-visual {
    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 0 20px;
  }

  .hero-card {
    width: 250px;
  }
}

/* Loading Animation */
@keyframes pulse {
  0% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
  100% {
    opacity: 1;
  }
}

.loading {
  animation: pulse 2s infinite;
}