/* ======================
   CSS Variables & Reset
   ====================== */
:root {
  /* Colors - Data Science Theme */
  --primary-color: #2563eb;
  --primary-light: #3b82f6;
  --primary-dark: #1d4ed8;
  --secondary-color: #7c3aed;
  --accent-color: #06b6d4;
  --accent-light: #22d3ee;

  /* 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%);
  --gradient-dark: linear-gradient(135deg, #0c0c0c 0%, #1a1a2e 100%);

  /* Dark Theme Colors */
  --bg-primary: #0f0f23;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #16213e;
  --bg-card: rgba(255, 255, 255, 0.05);
  --bg-glass: rgba(255, 255, 255, 0.1);

  /* Text Colors */
  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --text-accent: #22d3ee;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 4rem;
  --spacing-2xl: 6rem;

  /* Typography */
  --font-primary: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Effects */
  --border-radius: 12px;
  --border-radius-lg: 20px;
  --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --box-shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --box-shadow-glow: 0 0 20px rgba(34, 211, 238, 0.3);

  /* Animations */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  --animation-bounce: bounce 2s infinite;
}

/* Light Theme Colors */
body.light-mode {
  /* Light Theme Backgrounds */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-card: rgba(0, 0, 0, 0.03);
  --bg-glass: rgba(0, 0, 0, 0.05);

  /* Light Theme Text Colors */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-accent: #0891b2;

  /* Light Theme Gradients */
  --gradient-dark: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

  /* Light Theme Shadows */
  --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --box-shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --box-shadow-glow: 0 0 20px rgba(37, 99, 235, 0.2);
}

/* Reset & Base Styles */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  overflow-x: hidden;
  max-width: 100%;
}

body {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--gradient-dark);
  overflow-x: hidden;
  min-height: 100vh;
  max-width: 100vw;
  position: relative;
}

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

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

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

.loading-logo {
  font-size: 4rem;
  color: var(--accent-color);
  margin-bottom: var(--spacing-md);
  animation: pulse 2s infinite;
}

.loading-text {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.loading-bar {
  width: 200px;
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: 2px;
  overflow: hidden;
  margin: 0 auto;
}

.loading-progress {
  width: 0;
  height: 100%;
  background: var(--gradient-accent);
  border-radius: 2px;
  animation: loading-progress 2s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
}

@keyframes loading-progress {
  0% {
    width: 0;
  }
  50% {
    width: 70%;
  }
  100% {
    width: 100%;
  }
}

/* ======================
   Header & Navigation
   ====================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(15, 15, 35, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 1000;
  transition: var(--transition-normal);
}

.header.scrolled {
  background: rgba(15, 15, 35, 0.98);
  box-shadow: var(--box-shadow-lg);
}

.nav-container {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
  box-sizing: border-box;
}

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

.logo-text {
  font-size: 1.8rem;
  font-weight: var(--font-weight-bold);
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: var(--font-weight-medium);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  position: relative;
  transition: var(--transition-normal);
  padding: var(--spacing-xs) 0;
}

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

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

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

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

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

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

.nav-toggle.active .bar:nth-child(2) {
  opacity: 0;
}

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

/* Light Mode Navigation Styles */
body.light-mode .header {
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

body.light-mode .header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

body.light-mode .nav-link {
  color: var(--text-secondary);
}

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

body.light-mode .nav-toggle .bar {
  background: var(--text-primary);
}

body.light-mode .logo-subtitle {
  color: var(--text-muted);
}

/* ======================
   Common Components
   ====================== */
.container {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  box-sizing: border-box;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-title {
  font-size: 3rem;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-md);
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  text-align: center;
  gap: var(--spacing-xs);
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

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

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

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

.btn-secondary:hover {
  background: var(--accent-color);
  color: var(--text-primary);
  transform: translateY(-2px);
}

.btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.2);
  transition: left var(--transition-normal);
}

.btn:hover::before {
  left: 100%;
}

/* Filter Buttons */
.filter-btn {
  padding: 10px 20px;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition-normal);
  font-size: 0.9rem;
  font-weight: var(--font-weight-medium);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--gradient-accent);
  color: var(--text-primary);
  border-color: transparent;
  transform: translateY(-1px);
}

/* ======================
   Hero Section
   ====================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 100px 0 var(--spacing-2xl);
  background: var(--gradient-dark);
  overflow: hidden;
  width: 100%;
  max-width: 100vw;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><pattern id="grid" width="50" height="50" patternUnits="userSpaceOnUse"><path d="M 50 0 L 0 0 0 50" fill="none" stroke="rgba(34,211,238,0.1)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
  z-index: 1;
}

.hero-container {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  position: relative;
  z-index: 2;
  box-sizing: border-box;
}

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

.hero-greeting {
  font-size: 1.2rem;
  color: var(--text-accent);
  margin-bottom: var(--spacing-xs);
  animation: fadeInUp 1s ease 0.2s both;
}

.hero-name {
  font-size: 4rem;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-sm);
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeInUp 1s ease 0.4s both;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
  animation: fadeInUp 1s ease 0.6s both;
}

.typing-text {
  position: relative;
  color: var(--primary-color);
}

.typing-text::after {
  content: "|";
  position: absolute;
  right: -5px;
  color: var(--accent-color);
  animation: blink 1s infinite;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--spacing-lg);
  animation: fadeInUp 1s ease 0.8s both;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  animation: fadeInUp 1s ease 1s both;
}

.hero-social {
  display: flex;
  gap: var(--spacing-md);
  animation: fadeInUp 1s ease 1.2s both;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background: var(--bg-glass);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 50%;
  transition: var(--transition-normal);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.social-link:hover {
  background: var(--gradient-accent);
  color: var(--text-primary);
  transform: translateY(-3px);
  box-shadow: var(--box-shadow-glow);
}

/* Hero Visual */
.hero-visual {
  animation: fadeInRight 1s ease 0.6s both;
}

.hero-card {
  background: var(--bg-glass);
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  position: relative;
  overflow: hidden;
}

.hero-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-accent);
}

.code-lines {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.8;
  margin-bottom: var(--spacing-lg);
}

.code-line {
  padding: 4px 0;
  animation: fadeIn 0.5s ease both;
}

.code-line:nth-child(1) {
  animation-delay: 1.4s;
}
.code-line:nth-child(2) {
  animation-delay: 1.6s;
}
.code-line:nth-child(3) {
  animation-delay: 1.8s;
}
.code-line:nth-child(4) {
  animation-delay: 2s;
}

.code-keyword {
  color: #ff79c6;
}
.code-module {
  color: #8be9fd;
}
.code-variable {
  color: #f8f8f2;
}
.code-comment {
  color: #6272a4;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
  text-align: center;
}

.stat-item {
  animation: fadeInUp 0.5s ease both;
}

.stat-item:nth-child(1) {
  animation-delay: 2.2s;
}
.stat-item:nth-child(2) {
  animation-delay: 2.4s;
}
.stat-item:nth-child(3) {
  animation-delay: 2.6s;
}

.stat-number {
  font-size: 2rem;
  font-weight: var(--font-weight-bold);
  color: var(--text-accent);
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Scroll Indicator */
.scroll-indicator {
  text-align: center;
  animation: fadeIn 1s ease 3s both;
}

.scroll-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

.scroll-arrow {
  color: var(--text-accent);
  animation: bounce 2s infinite;
}

/* ======================
   About Section
   ====================== */
.about {
  padding: var(--spacing-2xl) 0;
  background: var(--bg-secondary);
  position: relative;
}

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

.about-description {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: var(--spacing-lg);
}

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

.about-description strong {
  color: var(--text-accent);
}

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.highlight-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-glass);
  border-radius: var(--border-radius);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition-normal);
}

.highlight-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--box-shadow-lg);
}

.highlight-item i {
  font-size: 1.5rem;
  color: var(--text-accent);
  margin-top: 4px;
}

.highlight-content h4 {
  color: var(--text-primary);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-xs);
}

.highlight-content p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.about-roles h3 {
  color: var(--text-primary);
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

.roles-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.role-item {
  background: var(--bg-glass);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.role-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-accent);
}

.role-item:hover {
  transform: translateX(4px);
  box-shadow: var(--box-shadow);
}

/* ======================
   Skills Section
   ====================== */
.skills {
  padding: var(--spacing-2xl) 0;
  background: var(--bg-primary);
}

.skills-filter {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-2xl);
  flex-wrap: wrap;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
  gap: var(--spacing-lg);
}

.skill-category {
  background: var(--bg-glass);
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  transition: var(--transition-normal);
}

.skill-category:hover {
  transform: translateY(-4px);
  box-shadow: var(--box-shadow-lg);
}

.skill-category h3 {
  color: var(--text-accent);
  font-size: 1.2rem;
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.skill-item {
  margin-bottom: var(--spacing-md);
}

.skill-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xs);
}

.skill-name {
  color: var(--text-primary);
  font-weight: var(--font-weight-medium);
}

.skill-percentage {
  color: var(--text-accent);
  font-size: 0.9rem;
  font-weight: var(--font-weight-semibold);
}

.skill-bar {
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.skill-progress {
  height: 100%;
  background: var(--gradient-accent);
  border-radius: 4px;
  width: 0;
  transition: width 1.5s ease 0.5s;
  position: relative;
}

.skill-progress::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.2);
  transform: translateX(-100%);
  animation: shimmer 1.5s ease-in-out infinite;
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

/* ======================
   Projects Section
   ====================== */
.projects {
  padding: var(--spacing-2xl) 0;
  background: var(--bg-secondary);
}

.projects-filter {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-2xl);
  flex-wrap: wrap;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(400px, 100%), 1fr));
  gap: var(--spacing-lg);
}

.project-card {
  background: var(--bg-glass);
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: var(--transition-normal);
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--box-shadow-glow);
}

.project-card.featured {
  border: 2px solid var(--accent-color);
}

.project-card.featured::before {
  content: "UNGGULAN";
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: var(--gradient-accent);
  color: var(--text-primary);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: var(--font-weight-bold);
  z-index: 2;
}

.project-image {
  height: 200px;
  background: var(--gradient-primary);
  position: relative;
  overflow: hidden;
}

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

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

.project-content {
  padding: var(--spacing-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-title {
  color: var(--text-primary);
  font-size: 1.3rem;
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
}

.project-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
  flex: 1;
}

.project-technologies {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.tech-tag {
  background: var(--bg-tertiary);
  color: var(--text-accent);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: var(--font-weight-medium);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

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

.project-link {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 10px 16px;
  text-decoration: none;
  border-radius: var(--border-radius);
  font-size: 0.9rem;
  font-weight: var(--font-weight-medium);
  transition: var(--transition-normal);
}

.project-link.primary {
  background: var(--gradient-accent);
  color: var(--text-primary);
}

.project-link.secondary {
  background: transparent;
  color: var(--text-accent);
  border: 1px solid var(--accent-color);
}

.project-link:hover {
  transform: translateY(-2px);
}

.project-link.primary:hover {
  box-shadow: var(--box-shadow-glow);
}

.project-link.secondary:hover {
  background: var(--accent-color);
  color: var(--text-primary);
}

/* ======================
   Contact Section
   ====================== */
.contact {
  padding: var(--spacing-2xl) 0;
  background: var(--bg-primary);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
}

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

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--bg-glass);
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-lg);
  transition: var(--transition-normal);
}

.contact-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--box-shadow);
}

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

.contact-details h4 {
  color: var(--text-primary);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-xs);
}

.contact-details p {
  color: var(--text-secondary);
}

/* Contact Form */
.contact-form {
  background: var(--bg-glass);
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
}

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

.form-group label {
  display: block;
  color: var(--text-primary);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-xs);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-tertiary);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  font-family: var(--font-primary);
  transition: var(--transition-normal);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.1);
}

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

/* ======================
   Footer
   ====================== */
.footer {
  padding: var(--spacing-lg) 0;
  background: var(--bg-tertiary);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

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

.footer-social {
  display: flex;
  gap: var(--spacing-sm);
}

/* ======================
   Animations
   ====================== */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

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

@keyframes bounce {
  0%,
  20%,
  53%,
  80%,
  100% {
    transform: translate3d(0, 0, 0);
  }
  40%,
  43% {
    transform: translate3d(0, -10px, 0);
  }
  70% {
    transform: translate3d(0, -5px, 0);
  }
  90% {
    transform: translate3d(0, -2px, 0);
  }
}

@keyframes blink {
  0%,
  50% {
    opacity: 1;
  }
  51%,
  100% {
    opacity: 0;
  }
}

/* Scroll animations */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-left.animate {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-right.animate {
  opacity: 1;
  transform: translateX(0);
}

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

  .hero-name {
    font-size: 3rem;
  }

  .hero-title {
    font-size: 2rem;
  }

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

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

  .projects-grid {
    grid-template-columns: repeat(auto-fit, minmax(min(350px, 100%), 1fr));
  }
}

@media (max-width: 768px) {
  html,
  body {
    overflow-x: hidden;
    max-width: 100%;
  }

  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: rgba(15, 15, 35, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding: var(--spacing-2xl) 0;
    transition: left var(--transition-normal);
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: 120px 0 var(--spacing-xl);
    max-width: 100vw;
    overflow-x: hidden;
  }

  .hero-content {
    max-width: 100%;
    overflow-x: hidden;
  }

  .hero-name {
    font-size: 2.5rem;
    word-wrap: break-word;
  }

  .hero-title {
    font-size: 1.5rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
    width: 100%;
  }

  .hero-buttons .btn {
    width: 100%;
    max-width: 300px;
  }

  .skills-grid {
    grid-template-columns: 1fr;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .stats {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .footer-content {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }

  /* Prevent all sections from overflowing */
  section {
    max-width: 100vw;
    overflow-x: hidden;
  }

  .container {
    max-width: 100%;
    overflow-x: hidden;
  }
}

@media (max-width: 480px) {
  html,
  body {
    overflow-x: hidden !important;
    max-width: 100% !important;
  }

  * {
    max-width: 100%;
  }

  .container {
    padding: 0 var(--spacing-sm);
    width: 100%;
    box-sizing: border-box;
  }

  .nav-container {
    padding: 0 var(--spacing-sm);
    width: 100%;
    box-sizing: border-box;
  }

  .hero-container {
    padding: 0 var(--spacing-sm);
    width: 100%;
    box-sizing: border-box;
  }

  .hero-name {
    font-size: 2rem;
    word-wrap: break-word;
    overflow-wrap: break-word;
  }

  .section-title {
    font-size: 1.8rem;
    word-wrap: break-word;
  }

  .skills-filter,
  .projects-filter {
    gap: var(--spacing-xs);
    width: 100%;
    box-sizing: border-box;
  }

  .filter-btn {
    padding: 8px 16px;
    font-size: 0.8rem;
  }

  .hero-card {
    padding: var(--spacing-md);
    width: 100%;
    box-sizing: border-box;
  }

  .code-lines {
    font-size: 0.8rem;
    overflow-x: auto;
  }

  /* Ensure buttons don't overflow */
  .btn {
    width: 100%;
    box-sizing: border-box;
  }

  /* Ensure images don't overflow */
  img {
    max-width: 100%;
    height: auto;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --bg-primary: #000000;
    --bg-secondary: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Print styles */
@media print {
  .loading-screen,
  .header,
  .scroll-indicator,
  .hero-buttons,
  .hero-social,
  .contact-form,
  .theme-toggle {
    display: none !important;
  }

  body {
    background: white !important;
    color: black !important;
  }
}

/* ======================
   Theme Toggle Button
   ====================== */
.theme-toggle {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 55px;
  height: 55px;
  border-radius: 50%;
  background: var(--gradient-accent);
  border: none;
  color: white;
  font-size: 1.3rem;
  cursor: pointer;
  box-shadow: var(--box-shadow-lg);
  z-index: 1000;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.theme-toggle:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.theme-toggle:active {
  transform: translateY(-1px) scale(0.98);
}

.theme-toggle i {
  transition: all var(--transition-normal);
}

.theme-toggle:hover i {
  transform: rotate(20deg);
}

body.light-mode .theme-toggle {
  background: var(--gradient-primary);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

/* Light Mode - Cards & Components */
body.light-mode .project-card,
body.light-mode .skill-item,
body.light-mode .contact-info-card,
body.light-mode .hero-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(0, 0, 0, 0.1);
}

body.light-mode .project-card:hover,
body.light-mode .skill-item:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

body.light-mode .tech-tag,
body.light-mode .filter-btn {
  background: var(--bg-tertiary);
  color: var(--primary-color);
  border: 1px solid rgba(0, 0, 0, 0.08);
}

body.light-mode .filter-btn.active {
  background: var(--primary-color);
  color: white;
}

body.light-mode .project-links a,
body.light-mode .btn-secondary {
  background: var(--bg-tertiary);
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

body.light-mode .btn-primary {
  background: var(--primary-color);
  color: white;
}

/* Light Mode - Footer */
body.light-mode .footer {
  background: var(--bg-tertiary);
  border-top: 1px solid rgba(0, 0, 0, 0.1);
}

body.light-mode .footer-text p {
  color: var(--text-muted);
}

/* Light Mode - Form Elements */
body.light-mode .form-group input,
body.light-mode .form-group textarea {
  background: var(--bg-card);
  border: 1px solid rgba(0, 0, 0, 0.15);
  color: var(--text-primary);
}

body.light-mode .form-group input:focus,
body.light-mode .form-group textarea:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Light Mode - Loading Screen */
body.light-mode .loading-screen {
  background: linear-gradient(135deg, #ffffff 0%, #f0f9ff 100%);
}

body.light-mode .loading-text {
  color: var(--text-primary);
}

@media (max-width: 768px) {
  .theme-toggle {
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    font-size: 1.1rem;
  }
}