:root {
  /* Light Theme Colors */
  --primary-color: #6366f1;
  --primary-hover: #4f46e5;
  --secondary-color: #f1f5f9;
  --accent-color: #06b6d4;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --border-color: #e2e8f0;
  --shadow-light: rgba(0, 0, 0, 0.1);
  --shadow-medium: rgba(0, 0, 0, 0.15);
  --shadow-heavy: rgba(0, 0, 0, 0.25);
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-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-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
}

/* Dark Theme Colors */
[data-theme="dark"] {
  --primary-color: #818cf8;
  --primary-hover: #6366f1;
  --secondary-color: #1e293b;
  --accent-color: #22d3ee;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --border-color: #334155;
  --shadow-light: rgba(0, 0, 0, 0.3);
  --shadow-medium: rgba(0, 0, 0, 0.4);
  --shadow-heavy: rgba(0, 0, 0, 0.6);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  /* line-height: 1.2; */
  margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}
.sub-container{
  margin-top: 50px;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Section Styles */
section {
  padding: var(--spacing-3xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-muted);
  font-weight: 400;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: all var(--transition-normal);
}

[data-theme="dark"] .navbar {
  background: rgba(15, 23, 42, 0.8);
}

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

.nav-logo .logo-text {
  font-size: var(--font-size-xl);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  gap: var(--spacing-xl);
}

.nav-link {
  font-weight: 500;
  color: var(--text-primary);
  transition: color var(--transition-fast);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-fast);
}

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

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

.theme-toggle {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--bg-tertiary);
  transform: scale(1.05);
}

.theme-toggle i {
  color: var(--text-primary);
  font-size: var(--font-size-lg);
}

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
}

.hamburger .bar {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
  border-radius: 2px;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 80% 20%, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  position: relative;
  z-index: 1;
  margin-top: 50px;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
}

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

.name-text {
  color: var(--text-primary);
  display: block;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  min-height: 2em; /* tambahkan ini */
  line-height: 2em; /* tambahkan ini */
  position: relative; /* tambahkan ini */
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  max-width: 500px;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.btn {
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: var(--font-size-base);
  transition: all var(--transition-fast);
  border: none;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 15px var(--shadow-light);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--shadow-medium);
  color: rgb(255, 255, 67);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

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

/* Hero visual now holds the profile image */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 420px;
  aspect-ratio: 1 / 1;
  margin: 0 auto;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 12px 36px rgba(0,0,0,0.16);
}

/* image container in hero */
.image-halim {
  width: 100%;
  height: 100%;
  border-radius: 12px;
  overflow: hidden;
}
.image-halim img {
  object-fit: cover;
  border-radius: 12px;
  width: 100%;
  height: 100%;
  display: block;
  transition: transform 0.6s ease, box-shadow 0.25s ease;
  /* drop shadow untuk foto */
  /* box-shadow: 0 18px 40px rgba(0,0,0,0.28); */
}
.image-halim img:hover {
  transform: scale(1.03);
  /* box-shadow: 0 28px 60px rgba(0,0,0,0.36); */
}

/*  now acts as visual area for floating cards */
.about-image {
  position: relative;
  height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  border-radius: 12px;
  /* background: linear-gradient(135deg, rgba(255,255,255,0.02), rgba(0,0,0,0.02)); */
  overflow: visible;
}

/* smaller floating cards for about area (tweak positions) */
.about-image .floating-card {
  position: absolute;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: calc(var(--spacing-md) + 4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  backdrop-filter: blur(6px);
  animation: float 6s ease-in-out infinite;
  min-width: 120px;
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* re-position to look balanced inside about-image */
.about-image .floating-card:nth-child(1) {
  top: 16%;
  left: 8%;
  transform-origin: center;
  animation-delay: 0s;
}
.about-image .floating-card:nth-child(2) {
  top: 28%;
  right: 8%;
  animation-delay: 1.6s;
}
.about-image .floating-card:nth-child(3) {
  bottom: 8%;
  left: 18%;
  animation-delay: 3.2s;
}

.about-image .card-content i {
  font-size: 1.4rem;
  color: var(--primary-color);
}
.about-image .card-content span {
  display: block;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 6px;
  font-size: 0.95rem;
}

/* keep floating animation keyframes (existing) */
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-14px); }
}

/* About Section */
.about {
  background: var(--bg-secondary);
}

.about-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.about-text p {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-lg);
  text-align: justify;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.stat-item {
  text-align: center;
  padding: var(--spacing-lg);
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.stat-number {
  display: block;
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  font-weight: 500;
}

.image-placeholder {
  width: 100%;
  height: 100%;
  background: var(--gradient-primary);
  /* border-radius: 50%; */
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden; 
}

/* Skills Section */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.skill-category {
  background: var(--bg-primary);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 20px var(--shadow-light);
}

.skill-category h3 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-xl);
}

.skill-items {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.skill-item {
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.skill-item:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

/* Projects Section */
.projects {
  background: var(--bg-secondary);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

.project-card {
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 20px var(--shadow-light);
  transition: all 0.3s ease-in-out;
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px var(--shadow-medium);
}

.project-image {
  height: 200px;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-image .image-placeholder {
  width: 80px;
  height: 80px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--font-size-2xl);
}

.project-content {
  padding: var(--spacing-xl);
}

.project-content h3 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.project-content p {
  text-align: justify;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.project-tech span {
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 500;
  border: 1px solid var(--border-color);
}

.project-links {
  display: flex;
  gap: var(--spacing-md);
}

.project-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--primary-color);
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

/* Contact Section */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.contact-item i {
  font-size: var(--font-size-xl);
  color: var(--primary-color);
  width: 40px;
  text-align: center;
}

.contact-item h4 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.contact-item p {
  color: var(--text-secondary);
  margin: 0;
}

.contact-form {
  background: var(--bg-secondary);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-family);
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
}

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

/* Footer */
.footer {
  background: var(--bg-tertiary);
  padding: var(--spacing-xl) 0;
  border-top: 1px solid var(--border-color);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-text p {
  color: var(--text-muted);
  margin: 0;
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
}

.social-link {
  width: 40px;
  height: 40px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  /* hero image size on tablet */
  .hero-visual {
    max-width: 440px;
    aspect-ratio: 1 / 1;
    margin: 24px auto 0;
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  }

  .about-image {
    height: 360px;
    margin-top: 24px;
  }

  .about-image .floating-card:nth-child(1) { top: 8%; left: 6%; }
  .about-image .floating-card:nth-child(2) { top: 34%; right: 6%; }
  .about-image .floating-card:nth-child(3) { bottom: 10%; left: 20%; }
}

@media (max-width: 768px) {
  .about-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .contact-content {
    grid-template-columns: 1fr;
  }

  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: var(--bg-primary);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding-top: var(--spacing-xl);
    transition: left var(--transition-normal);
    border-top: 1px solid var(--border-color);
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .hamburger {
    display: flex;
  }
  
  .hamburger.active .bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .hamburger.active .bar:nth-child(2) {
    opacity: 0;
  }
  
  .hamburger.active .bar:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
  
  .hero-title {
    font-size: var(--font-size-4xl);
  }
  
  .hero-buttons {
    justify-content: center;
  }

  .hero-visual {
    max-width: 360px;
    aspect-ratio: 1 / 1;
  }
  
  .stats {
    grid-template-columns: 1fr;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    flex-direction: column;
    gap: var(--spacing-lg);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .hero-visual {
    max-width: 85vw;
    aspect-ratio: 1 / 1;
  }
  
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .section-title {
    font-size: var(--font-size-3xl);
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }
  
  .floating-card {
    padding: var(--spacing-md);
  }
  
  .card-content i {
    font-size: var(--font-size-lg);
  }
  
  .card-content span {
    font-size: var(--font-size-sm);
  }
}

/* Smooth scrolling for older browsers */
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

/* Print styles */
@media print {
  .navbar,
  .hero-visual,
  .floating-card,
  .theme-toggle,
  .hamburger {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .hero {
    min-height: auto;
    padding: var(--spacing-xl) 0;
  }
}