/* ===== CSS RESET & BASE ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Colors */
  --primary: #00ff88;
  --primary-dark: #00cc6a;
  --secondary: #6366f1;
  --accent: #f59e0b;
  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --background: #000000;
  --surface: #111111;
  --surface-elevated: #1a1a1a;
  --border: #262626;
  --border-light: #404040;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #00ff88 0%, #00cc6a 100%);
  --gradient-secondary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --gradient-accent: linear-gradient(135deg, #f59e0b 0%, #f97316 100%);
  --gradient-hero: linear-gradient(135deg, #000000 0%, #111111 50%, #000000 100%);
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 20px rgba(0, 255, 136, 0.3);
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* Transitions */
  --transition-fast: 0.15s ease-out;
  --transition-normal: 0.3s ease-out;
  --transition-slow: 0.5s ease-out;
}

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

body {
  font-family: var(--font-primary);
  background: var(--background);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== LOADING SCREEN ===== */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--background);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease-out, visibility 0.5s ease-out;
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-content {
  text-align: center;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top: 3px solid var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--space-md);
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loading-text {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
}

/* ===== SCROLL PROGRESS ===== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--border);
  z-index: 1000;
}

.scroll-progress-bar {
  height: 100%;
  background: var(--gradient-primary);
  width: 0%;
  transition: width 0.1s ease-out;
}

/* ===== NAVIGATION ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(0, 0, 0, 0.95);
  box-shadow: var(--shadow-lg);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--primary);
}

.nav-info {
  display: flex;
  flex-direction: column;
}

.nav-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.nav-title {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.875rem;
  transition: all var(--transition-normal);
  position: relative;
  padding: var(--space-sm) 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  padding: var(--space-sm);
}

.hamburger-line {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-normal);
}

/* ===== HERO SECTION ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: var(--gradient-hero);
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 50%, rgba(0, 255, 136, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 80%, rgba(245, 158, 11, 0.1) 0%, transparent 50%);
}

.hero-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
  min-height: 100vh;
  padding-top: 100px; /* Add top padding to account for fixed navbar */
}

.hero-text {
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: rgba(0, 255, 136, 0.1);
  border: 1px solid rgba(0, 255, 136, 0.3);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-xl);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--primary);
  margin-bottom: var(--space-lg);
  animation: fadeInUp 0.8s ease-out;
}

.badge-icon {
  font-size: 1.25rem;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-lg);
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.title-line {
  display: block;
}

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

.hero-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-2xl);
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  animation: fadeInUp 0.8s ease-out 0.6s both;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeInUp 0.8s ease-out 0.8s both;
}

.floating-card {
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-xl);
  backdrop-filter: blur(20px);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.floating-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    45deg,
    rgba(0, 255, 136, 0.08) 0%,
    rgba(99, 102, 241, 0.08) 25%,
    rgba(0, 255, 136, 0.04) 50%,
    rgba(99, 102, 241, 0.08) 75%,
    rgba(0, 255, 136, 0.08) 100%
  );
  background-size: 400% 400%;
  animation: gradientMove 8s ease-in-out infinite;
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
}

@keyframes gradientMove {
  0% {
    background-position: 0% 0%;
    transform: scale(1);
  }
  25% {
    background-position: 100% 0%;
    transform: scale(1.02);
  }
  50% {
    background-position: 100% 100%;
    transform: scale(1);
  }
  75% {
    background-position: 0% 100%;
    transform: scale(1.01);
  }
  100% {
    background-position: 0% 0%;
    transform: scale(1);
  }
}

.floating-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.card-content {
  text-align: left;
}

.card-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.card-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  overflow: hidden;
  border: 1px solid var(--primary);
}

.card-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-info h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.card-info p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.card-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.scroll-indicator {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  animation: fadeInUp 0.8s ease-out 1s both;
}

.scroll-text {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.scroll-arrow {
  animation: bounce 2s infinite;
}

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

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  border: none;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.875rem;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--surface-elevated);
  border-color: var(--primary);
  color: var(--primary);
}

.btn-white {
  background: var(--text-primary);
  color: var(--background);
}

.btn-white:hover {
  background: var(--primary);
  color: var(--background);
}

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

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.section-badge {
  display: inline-block;
  background: rgba(0, 255, 136, 0.1);
  color: var(--primary);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-xl);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: var(--space-lg);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== SISASALDO SECTION ===== */
.sisasaldo-section {
  padding: var(--space-xs) 0;
  background: var(--surface);
}

.sisasaldo-card {
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--space-xl);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
  box-shadow: var(--shadow-xl);
  transition: all var(--transition-normal);
}

.sisasaldo-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.sisasaldo-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.sisasaldo-image img {
  width: 100%;
  height: auto;
  display: block;
}

.sisasaldo-badge {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: rgba(0, 255, 136, 0.9);
  color: var(--background);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.sisasaldo-content {
  padding: var(--space-xs);
}

.sisasaldo-category {
  color: var(--primary);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.sisasaldo-title {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--space-lg);
}

.sisasaldo-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-xl);
}

/* ===== ACHIEVEMENT SECTION ===== */
.achievement-section {
  padding: var(--space-3xl) 0;
  background: var(--surface);
}

.achievement-card {
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--space-xl);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
  box-shadow: var(--shadow-xl);
  transition: all var(--transition-normal);
}

.achievement-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.achievement-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.achievement-image img {
  width: 100%;
  height: auto;
  display: block;
}

.achievement-badge {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: rgba(0, 255, 136, 0.9);
  color: var(--background);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.achievement-content {
  padding: var(--space-lg);
}

.achievement-category {
  color: var(--primary);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.achievement-title {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--space-lg);
}

.achievement-title .highlight {
  color: var(--primary);
}

.achievement-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-xl);
}

/* ===== PROJECTS SECTION ===== */
.projects-section {
  padding: var(--space-3xl) 0;
  background: var(--background);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.project-card {
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-normal);
  cursor: pointer;
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary);
}

.project-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
  transform: scale(1.05);
}

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-content {
  padding: var(--space-lg);
}

.project-category {
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.project-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.project-description {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: var(--space-md);
}

.project-tags {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.tag {
  background: var(--surface);
  color: var(--text-secondary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
}

/* ===== RESEARCH SECTION ===== */
.research-section {
  padding: var(--space-3xl) 0;
  background: var(--surface);
}

.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(520px, 1fr));
  gap: var(--space-2xl);
}

.research-card {
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--space-lg);
  transition: all var(--transition-normal);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.research-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
  border-color: var(--primary);
}

.research-card-content {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}

.research-icon {
  width: 48px;
  height: 48px;
  background: transparent;
  border: 1px solid var(--primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
  transition: all var(--transition-normal);
  box-shadow: 0 2px 8px rgba(0, 255, 136, 0.1);
}

.research-icon i {
  width: 24px;
  height: 24px;
  stroke-width: 2;
}

.research-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.research-category {
  color: var(--primary);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-xs);
}

.research-title {
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
  margin: 0 0 var(--space-xs) 0;
}

.research-description {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.5;
  margin: 0 0 var(--space-sm) 0;
}

.research-methods {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.method-tag {
  background: rgba(0, 255, 136, 0.08);
  color: var(--primary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-md);
  font-size: 0.7rem;
  font-weight: 600;
  border: 1px solid rgba(0, 255, 136, 0.2);
  transition: all var(--transition-normal);
}

.research-card:hover .method-tag {
  background: rgba(0, 255, 136, 0.15);
  border-color: var(--primary);
}

.research-action {
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  flex-shrink: 0;
}

.research-action i {
  width: 16px;
  height: 16px;
  stroke-width: 2;
}

.research-card:hover .research-action {
  background: var(--surface);
  color: var(--primary);
  border-color: var(--primary);
  transform: translateX(2px);
}


/* ===== PRODUCTS SECTION ===== */
.products-section {
  padding: var(--space-3xl) 0;
  background: var(--background);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
}

.product-card {
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-normal);
  cursor: pointer;
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary);
}

.product-image {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.product-card:hover .product-image img {
  transform: scale(1.05);
}

.product-badge {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: var(--primary);
  color: var(--background);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
}

.product-content {
  padding: var(--space-lg);
}

.product-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  line-height: 1.4;
}

.product-price {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--space-md);
}

.product-rating {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.stars {
  color: var(--accent);
  font-size: 0.875rem;
}

.rating-text {
  color: var(--text-secondary);
  font-size: 0.75rem;
}

/* ===== EXPERIENCE SECTION ===== */
.experience-section {
  padding: var(--space-3xl) 0;
  background: var(--surface);
}

.experience-timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.experience-timeline::before {
  content: '';
  position: absolute;
  left: 30px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gradient-primary);
}

@media (max-width: 768px) {
  .experience-timeline::before {
    left: 20px; /* Adjust for smaller marker size on mobile */
  }
}

.timeline-item {
  position: relative;
  padding-left: 80px;
  margin-bottom: var(--space-2xl);
}

.timeline-marker {
  position: absolute;
  left: 0;
  top: 0;
}

.marker-dot {
  width: 60px;
  height: 60px;
  background: var(--surface-elevated);
  border: 3px solid var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 2;
}


.timeline-content {
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.timeline-content:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.timeline-period {
  color: var(--primary);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.timeline-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.timeline-company {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: var(--space-md);
}

.timeline-description {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== FREELANCE SECTION ===== */
.freelance-section {
  padding: var(--space-4xl) 0;
  background: var(--background);
}

.freelance-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-4xl);
}

.freelance-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.freelance-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.freelance-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.freelance-skills {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.skills-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-align: center;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.skill-card {
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  text-align: center;
  transition: all var(--transition-normal);
}

.skill-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
  border-color: var(--primary);
}

.skill-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-md);
  color: white;
}

.skill-icon i {
  font-size: 2rem;
}

.skill-card h4 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.skill-card p {
  color: var(--text-secondary);
  line-height: 1.5;
}


/* Portfolio Showcase */
.portfolio-showcase {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.showcase-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-align: center;
}

.showcase-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

.portfolio-item {
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
}

.portfolio-item-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
  text-align: center;
}

/* Mobile Only - SisaSaldo */
.mobile-only {
  display: block;
}

.iframe-container-mobile {
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.portfolio-iframe-mobile {
  width: 100%;
  height: 600px;
  border: none;
  display: block;
}

/* Desktop Only - Emtek Script Generation */
.desktop-only {
  display: none;
}

.iframe-container-desktop {
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.portfolio-iframe-desktop {
  width: 100%;
  height: 600px;
  border: none;
  display: block;
}

/* Responsive Design */
@media (min-width: 1024px) {
  .mobile-only {
    display: none;
  }
  
  .desktop-only {
    display: block;
  }
}

@media (max-width: 1023px) {
  .desktop-only {
    display: none;
  }
  
  .mobile-only {
    display: block;
  }
}

.freelance-cta {
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--space-4xl);
  text-align: center;
}

.cta-content {
  max-width: 600px;
  margin: 0 auto;
}

.cta-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
}

.cta-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-2xl);
}

.cta-actions {
  display: flex;
  gap: var(--space-lg);
  justify-content: center;
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .freelance-title {
    font-size: 2rem;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
  }
  
  .cta-actions {
    flex-direction: column;
    align-items: center;
  }
}

/* ===== CONTACT SECTION ===== */
.contact-section {
  padding: var(--space-3xl) 0;
  background: var(--background);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.contact-title {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: var(--space-lg);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.contact-description {
  color: var(--text-secondary);
  font-size: 1.125rem;
  line-height: 1.7;
  margin-bottom: var(--space-2xl);
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.contact-method {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-lg);
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  text-decoration: none;
  transition: all var(--transition-normal);
}

.contact-method:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.method-icon {
  width: 50px;
  height: 50px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--background);
  font-size: 1.25rem;
}

.method-info h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
  color: var(--text-primary);
}

.method-info p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.contact-social h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-lg);
}

.social-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.social-link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition-normal);
}

.social-link:hover {
  background: var(--primary);
  color: var(--background);
  transform: translateX(5px);
}

/* ===== FOOTER ===== */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: var(--space-2xl) 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
}

.footer-info h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.footer-info p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.footer-links {
  display: flex;
  gap: var(--space-lg);
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color var(--transition-normal);
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.75rem;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-2xl);
    padding-top: 120px; /* Extra padding for mobile */
  }
  
  .achievement-card {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .sisasaldo-card {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background: var(--surface);
    border-top: 1px solid var(--border);
    flex-direction: column;
    padding: var(--space-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .nav-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .nav-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
  
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }
  
  .projects-grid,
  .research-grid,
  .products-grid {
    grid-template-columns: 1fr;
  }
  
  .timeline-item {
    padding-left: 50px; /* Reduced padding for mobile */
  }
  
  .marker-dot {
    width: 40px;
    height: 40px;
  }
  
  /* Ensure timeline line aligns with marker centers on mobile */
  .experience-timeline::before {
    left: 20px; /* Center of 40px marker */
  }
  
  .footer-content {
    flex-direction: column;
    gap: var(--space-lg);
    text-align: center;
  }
  
  .footer-links {
    justify-content: center;
  }
  
  /* Hide scroll indicator on mobile to avoid layout interference */
  .scroll-indicator {
    display: none;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }
  
  .hero-content {
    padding: 0 var(--space-md);
    padding-top: 140px; /* Extra padding for very small screens */
  }
  
  .hero-title {
    font-size: clamp(1.8rem, 4.5vw, 2.8rem);
  }
  
  .hero-description {
    font-size: 0.9rem;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .achievement-card,
  .timeline-content {
    padding: var(--space-lg);
  }
  
  .btn {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.8rem;
  }
}

/* ===== UTILITY CLASSES ===== */
.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ===== SCROLL BEHAVIOR ===== */
html {
  scroll-behavior: smooth;
}

/* ===== SELECTION STYLES ===== */
::selection {
  background: var(--primary);
  color: var(--background);
}

::-moz-selection {
  background: var(--primary);
  color: var(--background);
}