/* ========================
   CSS CUSTOM PROPERTIES
======================== */
:root {
  /* Primary Colors */
  --primary-color: #149ddd;
  --primary-dark: #0f7bb5;
  --primary-light: #37b3ed;
  --gradient-primary: linear-gradient(135deg, #149ddd 0%, #37b3ed 100%);
  --gradient-secondary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-accent: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  
  /* Dark Theme Colors */
  --bg-dark: #0a0e27;
  --bg-dark-secondary: #151b3d;
  --bg-dark-tertiary: #1e2654;
  --text-dark: #ffffff;
  --text-dark-secondary: #b8c5d6;
  
  /* Light Theme Colors */
  --bg-light: #ffffff;
  --bg-light-secondary: #f8f9fa;
  --bg-light-tertiary: #e9ecef;
  --text-light: #272829;
  --text-light-secondary: #6c757d;
  
  /* Accent Colors */
  --accent-blue: #4285f4;
  --accent-green: #34a853;
  --accent-red: #ea4335;
  --accent-yellow: #fbbc04;
  --accent-purple: #9c27b0;
  --accent-orange: #ff9800;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Monaco', 'Cascadia Code', monospace;
  
  /* Spacing */
  --section-padding: 100px 0;
  --container-padding: 15px;
  --border-radius: 16px;
  --border-radius-small: 8px;
  --border-radius-large: 24px;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 20px rgba(20, 157, 221, 0.3);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* Default theme variables (always dark) */
:root {
  --bg-primary: var(--bg-dark);
  --bg-secondary: var(--bg-dark-secondary);
  --bg-tertiary: var(--bg-dark-tertiary);
  --text-primary: var(--text-dark);
  --text-secondary: var(--text-dark-secondary);
  --shadow-color: rgba(0, 0, 0, 0.3);
}

/* Ensure good contrast for all text elements */
.section-modern:not(.section-dark) {
  background: var(--bg-primary);
  color: var(--text-primary);
}

.section-modern:not(.section-dark) h1,
.section-modern:not(.section-dark) h2,
.section-modern:not(.section-dark) h3,
.section-modern:not(.section-dark) h4,
.section-modern:not(.section-dark) h5,
.section-modern:not(.section-dark) h6 {
  color: var(--text-primary);
}

.section-modern:not(.section-dark) p {
  color: var(--text-secondary);
}

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

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

body {
  font-family: var(--font-primary);
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow-x: hidden;
  line-height: 1.7;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Improve link accessibility */
a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-normal);
}

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

a:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
  border-radius: var(--border-radius-small);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-dark);
}

/* Selection */
::selection {
  background: var(--primary-color);
  color: white;
}

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

/* ========================
   TYPOGRAPHY
======================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2.5rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 2rem); }
h5 { font-size: clamp(1.125rem, 2vw, 1.5rem); }
h6 { font-size: clamp(1rem, 1.5vw, 1.25rem); }

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
  font-size: 1.1rem;
}

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

a:hover {
  color: var(--primary-light);
  text-decoration: none;
}

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

/* ========================
   UTILITY CLASSES
======================== */
.section-modern {
  padding: var(--section-padding);
  position: relative;
  overflow: hidden;
}

.section-dark {
  background: var(--bg-secondary);
}

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

/* ========================
   BUTTONS
======================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 12px 24px;
  border: 2px solid transparent;
  border-radius: var(--border-radius-small);
  font-weight: 600;
  font-size: 1rem;
  text-transform: none;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn-modern {
  border-radius: var(--border-radius);
  padding: 16px 32px;
  font-weight: 600;
  text-transform: none;
  box-shadow: var(--shadow-md);
}

.btn-large {
  padding: 20px 40px;
  font-size: 1.125rem;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  border-color: transparent;
}

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

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

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

/* Button ripple effect */
.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transition: width 0.6s, height 0.6s;
  transform: translate(-50%, -50%);
  z-index: 0;
}

.btn:active::before {
  width: 300px;
  height: 300px;
}

.btn span, .btn i {
  position: relative;
  z-index: 1;
}

/* ========================
   SECTION TITLES
======================== */
.section-title {
  text-align: center;
  margin-bottom: 80px;
}

.section-heading {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 800;
  margin-bottom: 1rem;
  position: relative;
}

.section-heading::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.section-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ========================
   BACK TO TOP BUTTON
======================== */
.back-to-top {
  position: fixed;
  visibility: hidden;
  opacity: 0;
  right: 20px;
  bottom: 20px;
  z-index: var(--z-fixed);
  background: var(--gradient-primary);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-lg);
  border: none;
  cursor: pointer;
}

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

.back-to-top:hover {
  transform: translateY(-3px) scale(1.1);
  box-shadow: var(--shadow-glow);
}

.back-to-top i {
  font-size: 1.2rem;
  color: white;
}

/* ========================
   HEADER & NAVIGATION
======================== */
#header {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 300px;
  background: var(--bg-dark);
  overflow-y: auto;
  z-index: var(--z-fixed);
  transition: all var(--transition-normal);
  backdrop-filter: blur(20px);
  border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.header-modern {
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-dark-secondary) 100%);
  box-shadow: 4px 0 20px rgba(0, 0, 0, 0.2);
}

#header .profile {
  padding: 40px 30px;
  text-align: center;
  position: relative;
}

.profile-img-container {
  position: relative;
  display: inline-block;
  margin-bottom: 20px;
}

.profile-img {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border: 4px solid var(--primary-color);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-lg);
}

.profile-img:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-glow);
}

.status-indicator {
  position: absolute;
  bottom: 10px;
  right: 10px;
  width: 20px;
  height: 20px;
  border: 3px solid var(--bg-dark);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.status-indicator.online {
  background: var(--accent-green);
}

.status-indicator.busy {
  background: var(--accent-red);
}

.status-indicator.away {
  background: var(--accent-yellow);
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(52, 168, 83, 0.7); }
  70% { box-shadow: 0 0 0 10px rgba(52, 168, 83, 0); }
  100% { box-shadow: 0 0 0 0 rgba(52, 168, 83, 0); }
}

.profile-name {
  font-size: 1.8rem;
  font-weight: 700;
  margin: 15px 0 5px;
}

.profile-name a {
  color: inherit;
  text-decoration: none;
}

.profile-subtitle {
  color: var(--text-dark-secondary);
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 20px;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 45px;
  height: 45px;
  border-radius: 50%;
  color: white;
  font-size: 1.2rem;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.social-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: -1;
}

.social-link:hover::before {
  opacity: 1;
}

.social-link.instagram { background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%); }
.social-link.linkedin { background: #0077b5; }
.social-link.github { background: #333; }
.social-link.email { background: var(--accent-blue); }

.social-link:hover {
  transform: translateY(-3px) scale(1.1);
  box-shadow: var(--shadow-lg);
}

/* Navigation */
#navbar {
  padding: 0 30px 30px;
}

#navbar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

#navbar li {
  margin-bottom: 5px;
}

#navbar a {
  display: flex;
  align-items: center;
  padding: 15px 20px;
  color: var(--text-dark-secondary);
  text-decoration: none;
  border-radius: var(--border-radius-small);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

#navbar a::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--gradient-primary);
  transition: left var(--transition-normal);
  z-index: -1;
}

#navbar a:hover::before,
#navbar a.active::before {
  left: 0;
}

#navbar a:hover,
#navbar a.active {
  color: white;
  transform: translateX(5px);
}

#navbar a i {
  font-size: 1.2rem;
  margin-right: 15px;
  width: 20px;
  text-align: center;
}

#navbar a span {
  font-weight: 500;
}

/* Mobile Navigation */
.mobile-nav-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: var(--z-fixed);
  border: 0;
  background: var(--primary-color);
  color: white;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.5rem;
  display: none;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-lg);
}

.mobile-nav-toggle:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-glow);
}

/* ========================
   HERO SECTION
======================== */
#hero {
  width: 100%;
  height: 100vh;
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-dark-secondary) 50%, var(--bg-dark-tertiary) 100%);
  position: relative;
  overflow: hidden;
}

.hero-modern {
  background: linear-gradient(135deg, #0a0e27 0%, #151b3d 50%, #1e2654 100%);
  background-attachment: fixed;
}

.hero-bg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('/img/backgroundgerritjan.jpg') center/cover no-repeat;
  opacity: 0.1;
  z-index: 1;
}

.hero-container {
  position: relative;
  z-index: 3;
  text-align: center;
  color: white;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 30px;
  width: 100%;
}

.hero-content {
  animation: fadeInUp 1s ease-out;
}

.hero-greeting {
  font-size: clamp(1.2rem, 3vw, 1.5rem);
  font-weight: 400;
  color: var(--text-dark-secondary);
  margin-bottom: 10px;
  display: block;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 30px;
}

.hero-name {
  display: block;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-subtitle {
  font-size: clamp(1.25rem, 4vw, 2rem);
  font-weight: 500;
  margin-bottom: 30px;
  line-height: 1.4;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.typed-wrapper {
  color: var(--primary-light);
  font-weight: 600;
  display: inline-block;
  min-width: 280px;
}

.hero-description {
  font-size: clamp(1.1rem, 2.5vw, 1.3rem);
  color: var(--text-dark-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
}

.scroll-down {
  display: flex;
  flex-direction: column;
  align-items: center;
  color: var(--text-dark-secondary);
  text-decoration: none;
  transition: all var(--transition-normal);
}

.scroll-down:hover {
  color: var(--primary-color);
  transform: translateY(-5px);
}

.scroll-down span {
  font-size: 0.9rem;
  margin-bottom: 10px;
  font-weight: 500;
}

.scroll-arrow {
  width: 30px;
  height: 30px;
  border: 2px solid currentColor;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: bounce 2s infinite;
}

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

/* Floating Elements */
.floating-elements {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 2;
}

.floating-element {
  position: absolute;
  font-size: 3rem;
  color: rgba(20, 157, 221, 0.3);
  animation: float 6s ease-in-out infinite;
}

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

.floating-element:nth-child(2) {
  top: 60%;
  right: 10%;
  animation-delay: 2s;
}

.floating-element:nth-child(3) {
  bottom: 20%;
  left: 15%;
  animation-delay: 4s;
}

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(180deg); }
}

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

/* ========================
   ABOUT SECTION
======================== */
.about-img-container {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
}

.about-img {
  width: 100%;
  height: auto;
  transition: transform var(--transition-slow);
}

.about-img-container:hover .about-img {
  transform: scale(1.05);
}

.about-img-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
  padding: 30px;
  transform: translateY(100%);
  transition: transform var(--transition-normal);
}

.about-img-container:hover .about-img-overlay {
  transform: translateY(0);
}

.about-stats {
  display: flex;
  gap: 30px;
  justify-content: center;
}

.stat-item {
  text-align: center;
  color: white;
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 5px;
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.8;
}

.about-content {
  padding-left: 0;
}

.about-title {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  margin-bottom: 25px;
  line-height: 1.3;
}

.about-description {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 25px;
}

.about-details {
  margin: 40px 0;
}

.about-list {
  list-style: none;
  padding: 0;
}

.about-list li {
  display: flex;
  align-items: center;
  margin-bottom: 20px;
  font-size: 1rem;
  padding: 15px 20px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius-small);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-normal);
}

.about-list li:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateX(5px);
}

.about-list i {
  color: var(--primary-color);
  margin-right: 15px;
  font-size: 1.2rem;
  width: 25px;
  text-align: center;
}

.about-list strong {
  margin-right: 10px;
  color: var(--text-primary);
  min-width: 80px;
  font-weight: 600;
}

.about-list span {
  color: var(--text-secondary);
  font-weight: 500;
}

.about-highlights {
  margin: 40px 0;
}

.highlight-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 25px;
  margin-top: 25px;
}

.highlight-item {
  text-align: center;
  padding: 25px;
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.highlight-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.highlight-item i {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 15px;
}

.highlight-item h5 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.highlight-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 0;
}

.about-cta {
  display: flex;
  gap: 20px;
  margin-top: 40px;
  flex-wrap: wrap;
}

/* ========================
   SKILLS SECTION
======================== */
.skills-category {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 30px;
  color: var(--text-primary);
}

.skill-item {
  margin-bottom: 30px;
}

.skill-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.skill-info h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0;
  color: var(--text-primary);
}

.skill-percentage {
  font-size: 1rem;
  font-weight: 600;
  color: var(--primary-color);
}

.skill-bar {
  height: 12px;
  background: rgba(0, 0, 0, 0.4);
  border-radius: 8px;
  overflow: hidden;
  position: relative;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.skill-progress {
  height: 100%;
  background: linear-gradient(90deg, #149ddd 0%, #37b3ed 100%);
  border-radius: 8px;
  width: 0;
  transition: width 2.5s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  box-shadow: 0 2px 6px rgba(20, 157, 221, 0.35);
  border-radius: 8px;
}

.tech-stack {
  margin-top: 60px;
  padding: 40px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--border-radius-large);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.tech-icons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.tech-icon {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 30px 20px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
  border-radius: var(--border-radius);
  transition: all var(--transition-normal);
  border: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  overflow: hidden;
}

.tech-icon:hover {
  transform: translateY(-8px) scale(1.05);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
  box-shadow: 0 15px 35px rgba(14, 165, 233, 0.2);
}

.tech-icon i {
  font-size: 3rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 15px;
  transition: all var(--transition-normal);
}

.tech-icon:hover i {
  transform: scale(1.1) rotate(5deg);
}

.tech-icon span {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: center;
  position: relative;
  z-index: 2;
}

/* ========================
   PORTFOLIO SECTION
======================== */
.portfolio-filters {
  display: flex;
  justify-content: center;
  margin-bottom: 50px;
}

.portfolio-filters ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.portfolio-filters li {
  padding: 12px 24px;
  background: transparent;
  border: 2px solid var(--primary-color);
  border-radius: var(--border-radius-small);
  color: var(--primary-color);
  cursor: pointer;
  transition: all var(--transition-normal);
  font-weight: 500;
}

.portfolio-filters li:hover,
.portfolio-filters li.filter-active {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

.portfolio-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
}

.portfolio-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-normal);
}

.portfolio-item:hover {
  transform: translateY(-5px);
}

.portfolio-wrap {
  position: relative;
  overflow: hidden;
}

.portfolio-wrap img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.portfolio-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    rgba(20, 157, 221, 0.9),
    rgba(55, 179, 237, 0.9)
  );
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.portfolio-item:hover .portfolio-overlay {
  opacity: 1;
}

.portfolio-item:hover .portfolio-wrap img {
  transform: scale(1.1);
}

.portfolio-info {
  text-align: center;
  color: white;
}

.portfolio-info h4 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.portfolio-info p {
  font-size: 1rem;
  margin-bottom: 20px;
  opacity: 0.9;
}

.portfolio-links {
  display: flex;
  gap: 15px;
  justify-content: center;
}

.portfolio-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 45px;
  height: 45px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  color: white;
  font-size: 1.2rem;
  transition: all var(--transition-normal);
}

.portfolio-links a:hover {
  background: white;
  color: var(--primary-color);
  transform: scale(1.1);
}

.portfolio-cta {
  text-align: center;
  margin-top: 60px;
}

.portfolio-cta p {
  font-size: 1.2rem;
  margin-bottom: 30px;
  color: var(--text-secondary);
}

/* ========================
   SERVICES SECTION
======================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 40px;
}

.service-item {
  background: rgba(255, 255, 255, 0.05);
  padding: 40px 30px;
  border-radius: var(--border-radius);
  text-align: center;
  transition: all var(--transition-normal);
  border: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  overflow: hidden;
}

.service-item:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
  background: rgba(255, 255, 255, 0.08);
}

.service-icon {
  width: 80px;
  height: 80px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 25px;
  transition: transform var(--transition-normal);
}

.service-item:hover .service-icon {
  transform: scale(1.1) rotate(360deg);
}

.service-icon i {
  font-size: 2rem;
  color: white;
}

.service-item h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.service-item p {
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 25px;
  color: var(--text-secondary);
}

.service-features {
  list-style: none;
  padding: 0;
  margin: 0;
}

.service-features li {
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.service-features li:last-child {
  border-bottom: none;
}

.service-features li::before {
  content: '✓';
  color: var(--primary-color);
  font-weight: bold;
  margin-right: 10px;
}

.services-cta {
  text-align: center;
  margin-top: 80px;
  padding: 60px 40px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius-large);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.services-cta h3 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 15px;
  color: var(--text-primary);
}

.services-cta p {
  font-size: 1.1rem;
  margin-bottom: 30px;
  color: var(--text-secondary);
}

/* ========================
   TESTIMONIALS SECTION
======================== */
.testimonials-slider {
  margin-bottom: 60px;
}

.testimonial-item {
  background: var(--bg-primary);
  padding: 40px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  margin: 20px;
  position: relative;
  border: 1px solid rgba(0, 0, 0, 0.1);
}

.testimonial-content {
  margin-bottom: 30px;
  position: relative;
}

.quote-icon {
  font-size: 2rem;
  color: var(--primary-color);
  opacity: 0.3;
  position: absolute;
  top: -10px;
  left: -10px;
}

.testimonial-content p {
  font-size: 1.1rem;
  line-height: 1.7;
  font-style: italic;
  color: var(--text-secondary);
  margin: 0;
  padding-left: 30px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 20px;
}

.testimonial-img {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--primary-color);
}

.testimonial-info h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 5px;
  color: var(--text-primary);
}

.testimonial-info span {
  font-size: 0.95rem;
  color: var(--text-secondary);
  display: block;
  margin-bottom: 10px;
}

.testimonial-rating {
  display: flex;
  gap: 2px;
}

.testimonial-rating i {
  color: var(--accent-yellow);
  font-size: 0.9rem;
}

.testimonials-stats {
  background: var(--bg-primary);
  padding: 60px 0;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
}

.testimonials-stats .stat-item {
  text-align: center;
  padding: 20px;
}

.testimonials-stats .stat-item i {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 15px;
}

.testimonials-stats .stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-primary);
  display: block;
  margin-bottom: 10px;
}

.testimonials-stats .stat-label {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Swiper Pagination */
.swiper-pagination {
  margin-top: 30px;
}

.swiper-pagination-bullet {
  background: var(--primary-color);
  opacity: 0.3;
}

.swiper-pagination-bullet-active {
  opacity: 1;
}

/* ========================
   CONTACT SECTION
======================== */
.contact-info-centered {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.contact-info-centered h3 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.contact-info-centered > p {
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 60px;
  color: var(--text-secondary);
}

.contact-methods-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-bottom: 40px;
}

.contact-method {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding: 40px 25px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius);
  transition: all var(--transition-normal);
  border: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.contact-method:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(20, 157, 221, 0.2);
}

.contact-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-icon i {
  font-size: 1.5rem;
  color: white;
}

.contact-details h4 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.contact-details p {
  font-size: 1rem;
  margin-bottom: 5px;
  color: var(--text-secondary);
  font-weight: 500;
}

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

.contact-details p a:hover {
  color: var(--primary-light);
}

.contact-details span {
  font-size: 0.9rem;
  color: var(--text-secondary);
  opacity: 0.8;
}

/* Legacy contact styling */
.contact-info {
  padding-right: 40px;
}

.contact-info h3 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.contact-info > p {
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 40px;
  color: var(--text-secondary);
}

.contact-methods {
  margin-bottom: 40px;
}

.contact-method {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding: 40px 25px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius);
  transition: all var(--transition-normal);
  border: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.contact-method:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(20, 157, 221, 0.2);
}

.contact-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-icon i {
  font-size: 1.5rem;
  color: white;
}

.contact-details h4 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 5px;
  color: var(--text-primary);
}

.contact-details p {
  font-size: 1rem;
  margin-bottom: 5px;
  color: var(--text-secondary);
}

.contact-details span {
  font-size: 0.9rem;
  color: var(--text-secondary);
  opacity: 0.8;
}

.contact-social h4 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.contact-social .social-links {
  justify-content: flex-start;
}

.contact-form-container {
  background: rgba(255, 255, 255, 0.05);
  padding: 40px;
  border-radius: var(--border-radius);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-form .form-group {
  margin-bottom: 25px;
  position: relative;
}

.contact-form label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.contact-form .form-control {
  width: 100%;
  padding: 15px 50px 15px 15px;
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-small);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all var(--transition-normal);
}

.contact-form .form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 0 3px rgba(20, 157, 221, 0.1);
}

.contact-form .form-control::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.form-icon {
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--primary-color);
  opacity: 0.6;
}

.form-group:has(label) .form-icon {
  top: calc(50% + 15px);
}

.form-check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.form-check-input {
  margin-top: 4px;
}

.form-check-label {
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

.form-check-label a {
  color: var(--primary-color);
}

.form-messages {
  margin-top: 20px;
}

.alert {
  padding: 15px 20px;
  border-radius: var(--border-radius-small);
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.alert-success {
  background: rgba(52, 168, 83, 0.1);
  border: 1px solid rgba(52, 168, 83, 0.3);
  color: var(--accent-green);
}

.alert-danger {
  background: rgba(234, 67, 53, 0.1);
  border: 1px solid rgba(234, 67, 53, 0.3);
  color: var(--accent-red);
}

.contact-cta {
  margin-top: 60px;
  text-align: center;
  padding: 40px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-cta h3 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 15px;
  color: var(--text-primary);
}

.contact-cta p {
  font-size: 1.1rem;
  margin-bottom: 30px;
  color: var(--text-secondary);
}

.cta-features {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}

.cta-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-dark-secondary);
  font-size: 0.95rem;
}

.cta-feature i {
  color: var(--primary-color);
  font-size: 1.1rem;
}

/* ========================
   FOOTER
======================== */
.footer-modern {
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-dark-secondary) 100%);
  color: var(--text-dark);
  padding: 80px 0 30px;
  position: relative;
  overflow: hidden;
  margin-left: 300px; /* Add margin for sidebar */
  transition: margin-left 0.3s ease;
}

.footer-modern::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gradient-primary);
}

.footer-content {
  margin-bottom: 50px;
}

.footer-info h3 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 20px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-description {
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 25px;
  color: var(--text-dark-secondary);
}

.footer-social {
  display: flex;
  gap: 15px;
}

.footer-links h4,
.footer-services h4,
.footer-contact h4 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text-dark);
}

.footer-contact-title {
  margin-top: 28px;
}

.footer-links ul,
.footer-services ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li,
.footer-services li {
  margin-bottom: 10px;
}

.footer-links a,
.footer-services a {
  color: var(--text-dark-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  font-size: 0.95rem;
}

.footer-links a:hover,
.footer-services a:hover {
  color: var(--primary-color);
  transform: translateX(5px);
}

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 15px;
  color: var(--text-dark-secondary);
  font-size: 0.95rem;
}

.footer-contact-item i {
  color: var(--primary-color);
  width: 20px;
  text-align: center;
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.footer-made-with-love {
  color: var(--text-dark-secondary);
  font-size: 0.9rem;
  text-align: center;
}

.footer-made-with-love a {
  color: var(--primary-color);
  text-decoration: none;
}

.footer-made-with-love a:hover {
  color: var(--primary-light);
}

.footer-bottom-links {
  display: flex;
  gap: 30px;
  justify-content: flex-end;
}

.footer-bottom-links a {
  color: var(--text-dark-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

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

/* ========================
   RESPONSIVE DESIGN
======================== */
@media (max-width: 1199px) {
  #header {
    left: -300px;
  }
  
  #header.header-show {
    left: 0;
  }
  
  #main,
  #hero,
  .footer-modern {
    margin-left: 0;
  }
  
  .mobile-nav-toggle {
    display: flex;
  }
  
  .theme-toggle {
    right: 80px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 60px 0;
    --container-padding: 20px;
  }
  
  .hero-container {
    padding: 0 20px;
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  
  .about-content {
    padding-left: 0;
    margin-top: 40px;
  }
  
  .highlight-grid {
    grid-template-columns: 1fr;
  }
  
  .about-cta {
    flex-direction: column;
    align-items: stretch;
  }
  
  .tech-icons {
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 15px;
  }
  
  .portfolio-container {
    grid-template-columns: 1fr;
  }
  
  .services-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-info {
    padding-right: 0;
    margin-bottom: 40px;
  }
  
  .contact-form-container {
    padding: 30px 20px;
  }
  
  .cta-features {
    flex-direction: column;
    gap: 20px;
  }
  
  .footer-bottom-links {
    justify-content: center;
    margin-top: 20px;
  }

  .copyright,
  .footer-made-with-love {
    text-align: center;
    margin-top: 12px;
  }
}

@media (max-width: 575px) {
  .section-heading {
    font-size: 2rem;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .btn-modern {
    padding: 12px 24px;
    font-size: 0.95rem;
  }
  
  .portfolio-filters ul {
    justify-content: center;
  }
  
  .portfolio-filters li {
    padding: 8px 16px;
    font-size: 0.9rem;
  }
}

/* ========================
   VISUELE OPSCHONING
======================== */
.hero-name,
.status-indicator,
.skill-progress::after,
.scroll-arrow {
  animation: none !important;
}

.social-link:hover,
.service-item:hover,
.portfolio-item:hover,
.highlight-item:hover,
.contact-method:hover,
.btn-primary:hover,
.btn-outline:hover {
  transform: translateY(-2px);
}

.service-item:hover .service-icon {
  transform: scale(1.04);
}

.hero-subtitle {
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.footer-content {
  margin-bottom: 30px;
}

.footer-links ul {
  columns: 2;
  column-gap: 24px;
}

@media (max-width: 991px) {
  .footer-links ul {
    columns: 1;
  }

  .footer-contact-title {
    margin-top: 20px;
  }
}

/* ========================
   MAIN CONTENT ADJUSTMENT
======================== */
#main {
  margin-left: 300px;
}

@media (max-width: 1199px) {
  #main {
    margin-left: 0;
  }
}

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

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

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

/* ========================
   UTILITY ANIMATIONS
======================== */
.animate-fadeIn {
  animation: fadeIn 0.6s ease-out;
}

.animate-slideInLeft {
  animation: slideInLeft 0.6s ease-out;
}

.animate-slideInRight {
  animation: slideInRight 0.6s ease-out;
}

/* ========================
   PRINT STYLES
======================== */
@media print {
  #header,
  .mobile-nav-toggle,
  .back-to-top {
    display: none !important;
  }
  
  #main {
    margin-left: 0 !important;
  }
  
  .section-modern {
    padding: 40px 0;
  }
  
  body {
    background: var(--bg-primary) !important;
    color: var(--text-primary) !important;
  }
}