/* ================================================
   Modern Resume CSS - Design System
   Version: 2.0
   Author: Modernized for Ignasius Wahyu Widodo
   ================================================ */

/* ================================================
   1. CSS CUSTOM PROPERTIES (Design Tokens)
   ================================================ */

:root {
  /* Color Palette - Teal Professional Theme */
  --color-primary: #00796b;
  --color-primary-dark: #004d40;
  --color-primary-light: #009688;
  --color-accent: #26a69a;
  --color-accent-light: #a7ffeb;

  /* Neutral Colors */
  --color-white: #ffffff;
  --color-bg-main: #ffffff;
  --color-bg-alt: #f5f5f5;
  --color-bg-section: #fafafa;
  --color-bg-dark: #263238;

  /* Text Colors */
  --color-text-primary: #333333;
  --color-text-secondary: #666666;
  --color-text-light: #999999;
  --color-text-inverse: #ffffff;

  /* Border & Divider Colors */
  --color-border: #e0e0e0;
  --color-border-light: #dddddd;
  --color-divider: #cccccc;

  /* Semantic Colors */
  --color-success: #4caf50;
  --color-info: #2196f3;
  --color-warning: #ff9800;
  --color-error: #f44336;

  /* Social Media Colors */
  --color-linkedin: #0077b5;
  --color-github: #000000;
  --color-twitter: #1da1f2;

  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-family-heading: "Segoe UI", Roboto, system-ui, sans-serif;
  --font-family-mono: "SF Mono", Monaco, "Cascadia Code", monospace;

  /* Font Sizes - Fluid Typography */
  --font-size-xs: 0.75rem;     /* 12px */
  --font-size-sm: 0.875rem;    /* 14px */
  --font-size-base: 1rem;      /* 16px */
  --font-size-md: 1.125rem;    /* 18px */
  --font-size-lg: 1.25rem;     /* 20px */
  --font-size-xl: 1.5rem;      /* 24px */
  --font-size-2xl: 2rem;       /* 32px */
  --font-size-3xl: 2.5rem;     /* 40px */
  --font-size-4xl: 3rem;       /* 48px */

  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  --line-height-loose: 2;

  /* Spacing Scale (8px base unit) */
  --space-xs: 0.25rem;    /* 4px */
  --space-sm: 0.5rem;     /* 8px */
  --space-md: 1rem;       /* 16px */
  --space-lg: 1.5rem;     /* 24px */
  --space-xl: 2rem;       /* 32px */
  --space-2xl: 3rem;      /* 48px */
  --space-3xl: 4rem;      /* 64px */
  --space-4xl: 6rem;      /* 96px */

  /* Border Radius */
  --radius-none: 0;
  --radius-sm: 0.25rem;   /* 4px */
  --radius-md: 0.5rem;    /* 8px */
  --radius-lg: 0.75rem;   /* 12px */
  --radius-xl: 1rem;      /* 16px */
  --radius-2xl: 1.5rem;   /* 24px */
  --radius-full: 9999px;

  /* 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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --container-max-width: 1200px;
  --sidebar-width: 280px;
  --sidebar-width-compact: 240px;
  --header-height: 64px;
  --content-padding: var(--space-lg);

  /* Z-index Scale */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
}

/* ================================================
   2. RESET & BASE STYLES
   ================================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* ================================================
   3. TYPOGRAPHY
   ================================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  margin: 0;
  color: var(--color-text-primary);
}

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

p {
  margin: 0;
  line-height: var(--line-height-relaxed);
}

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

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

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

ul, ol {
  margin: 0;
  padding: 0;
  list-style-position: inside;
}

blockquote {
  border-left: 4px solid var(--color-primary);
  padding-left: var(--space-lg);
  margin: var(--space-lg) 0;
  font-style: italic;
  color: var(--color-text-secondary);
}

/* ================================================
   4. LAYOUT COMPONENTS
   ================================================ */

/* Main Layout */
.main-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
  background: url(../img/bg.png) repeat;
  background-size: 400px;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-fluid {
  width: 100%;
  padding: 0 var(--space-lg);
}

/* Section */
.section {
  padding: var(--space-3xl) 0;
  position: relative;
}

.section-compact {
  padding: var(--space-2xl) 0;
}

.full-height {
  min-height: 100vh;
  display: flex;
  align-items: center;
}

/* Page Title */
.page-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-light);
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: var(--space-lg) var(--space-xl);
  margin: 0 0 var(--space-3xl) 0;
  color: var(--color-text-inverse);
  background-color: var(--color-primary);
}

/* ================================================
   5. NAVIGATION
   ================================================ */

/* Desktop Sidebar Navigation */
.nav-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--color-white);
  box-shadow: var(--shadow-md);
  z-index: var(--z-fixed);
  overflow-y: auto;
}

.nav-sidebar-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-logo {
  background-color: var(--color-bg-section);
  border-bottom: 1px solid var(--color-border-light);
  padding: var(--space-2xl);
  text-align: center;
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-logo-link {
  display: block;
  line-height: 1;
}

.profile-pic {
  width: 130px;
  height: 130px;
  border-radius: var(--radius-full);
  border: 6px solid rgba(0, 77, 64, 0.4);
  object-fit: cover;
  display: block;
}

.nav-item {
  border-left: 3px solid transparent;
  transition: all var(--transition-fast);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-xl);
  color: var(--color-text-primary);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus {
  background-color: var(--color-bg-section);
  color: var(--color-primary);
}

.nav-item.active {
  border-left-color: var(--color-primary);
  background-color: var(--color-bg-section);
}

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

.nav-icon {
  font-size: var(--font-size-lg);
  width: 24px;
  text-align: center;
}

/* Mobile Navigation */
.nav-mobile {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--color-white);
  box-shadow: var(--shadow-md);
  z-index: var(--z-fixed);
  align-items: center;
  padding: 0 var(--space-lg);
}

.mobile-menu-toggle {
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  cursor: pointer;
  padding: var(--space-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-menu-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.name-title {
  flex: 1;
  text-align: center;
  line-height: 1.2;
}

.name-title a {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  display: block;
}

.name-title span {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  display: block;
}

/* Mobile Sidebar */
.nav-mobile-sidebar {
  position: fixed;
  top: var(--header-height);
  left: -100%;
  width: 280px;
  height: calc(100vh - var(--header-height));
  background: var(--color-white);
  box-shadow: var(--shadow-xl);
  transition: left var(--transition-base);
  overflow-y: auto;
  z-index: var(--z-fixed);
}

.nav-mobile-sidebar.active {
  left: 0;
}

.nav-mobile-overlay {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
  z-index: calc(var(--z-fixed) - 1);
}

.nav-mobile-overlay.active {
  opacity: 1;
  pointer-events: all;
}

/* Adjust main content for sidebar */
@media (min-width: 1024px) {
  main {
    margin-left: var(--sidebar-width);
  }
}

/* ================================================
   6. HERO SECTION
   ================================================ */

#intro {
  background: var(--color-accent-light);
  position: relative;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(0, 121, 107, 0.3) 0%, rgba(0, 77, 64, 0.5) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  color: var(--color-white);
  padding: var(--space-4xl) var(--space-lg);
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: var(--font-weight-light);
  margin-bottom: var(--space-md);
  text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
}

.hero-title .highlight {
  color: var(--color-accent-light);
  font-weight: var(--font-weight-semibold);
}

.hero-subtitle {
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  font-weight: var(--font-weight-light);
  margin-bottom: var(--space-lg);
  text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.3);
}

.hero-description {
  font-size: var(--font-size-md);
  line-height: var(--line-height-relaxed);
  max-width: 700px;
  margin-bottom: var(--space-2xl);
  text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.3);
}

/* Typing Animation */
.typing {
  font-weight: var(--font-weight-light);
  color: var(--color-primary-dark);
}

/* ================================================
   7. BUTTONS
   ================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  text-align: center;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  letter-spacing: 0.5px;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

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

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

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

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

.btn-group {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* Social Icon Buttons */
.social-links {
  display: flex;
  gap: var(--space-md);
  margin: var(--space-xl) 0;
}

.icon-btn {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.3);
  transition: all var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
}

.icon-btn:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-lg);
}

.icon-btn.linkedin {
  color: var(--color-linkedin);
  background: var(--color-white);
}

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

.icon-btn.github {
  color: var(--color-github);
  background: var(--color-white);
}

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

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

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

/* Floating Action Button */
.btn-floating {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-fast);
  border: none;
  cursor: pointer;
}

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

.btn-floating.btn-large {
  width: 64px;
  height: 64px;
  font-size: var(--font-size-xl);
}

/* ================================================
   8. CARDS
   ================================================ */

.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  margin-bottom: var(--space-2xl);
  transition: all var(--transition-base);
}

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

.card-content {
  padding: var(--space-xl);
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-md);
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
}

.card-subtitle {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  font-weight: var(--font-weight-normal);
}

.card-text {
  color: var(--color-text-primary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-md);
}

.card-action {
  padding: var(--space-md) var(--space-xl);
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.card-image {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.card.large .card-image {
  height: 280px;
}

/* Card with Logo */
.card-with-logo {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
  margin-bottom: var(--space-lg);
}

.card-logo {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
  object-fit: contain;
}

.card-body {
  flex: 1;
}

/* Card Lists */
.card ul {
  list-style-type: disc;
  padding-left: var(--space-xl);
  margin: var(--space-md) 0;
}

.card ul li {
  margin-bottom: var(--space-sm);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-primary);
}

.card ul li ul {
  margin-top: var(--space-sm);
  margin-bottom: 0;
}

.card ul li ul li {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

/* ================================================
   9. GRID SYSTEM
   ================================================ */

.grid {
  display: grid;
  gap: var(--space-xl);
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

.row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.col {
  flex: 1;
  min-width: 0;
}

/* ================================================
   10. SKILLS SECTION
   ================================================ */

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

.skill-category {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
}

.skill-category h4 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--color-border);
  color: var(--color-primary);
}

.skill-item {
  margin-bottom: var(--space-lg);
}

.skill-name {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-sm);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-base);
}

.skill-bar {
  height: 8px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary-light), var(--color-primary));
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

.skill-icon {
  width: 60px;
  height: 60px;
  object-fit: contain;
  margin: 0 auto var(--space-md);
  display: block;
}

/* ================================================
   11. PROJECTS SECTION
   ================================================ */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-xl);
}

.project-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
}

.project-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

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

.project-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-md);
  color: var(--color-text-primary);
}

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

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

.tag {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: var(--color-bg-alt);
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-medium);
}

/* ================================================
   12. CONTACT SECTION
   ================================================ */

.contact-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  max-width: 600px;
  margin: 0 auto;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.contact-icon {
  width: 56px;
  height: 56px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
  flex-shrink: 0;
}

.contact-info a {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
}

.contact-info a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

/* ================================================
   13. UTILITIES
   ================================================ */

/* Text Alignment */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* Text Colors */
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-light { color: var(--color-text-light); }
.text-white { color: var(--color-white); }

/* Background Colors */
.bg-primary { background-color: var(--color-primary); }
.bg-white { background-color: var(--color-white); }
.bg-alt { background-color: var(--color-bg-alt); }

/* Spacing Utilities */
.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.p-0 { padding: 0; }
.p-sm { padding: var(--space-sm); }
.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }
.p-xl { padding: var(--space-xl); }

/* Display Utilities */
.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }

/* Flex Utilities */
.flex-row { flex-direction: row; }
.flex-column { flex-direction: column; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* Hover Effect */
.hoverline {
  border-bottom: 3px solid transparent;
  padding-bottom: 2px;
  transition: border-color var(--transition-fast);
}

.hoverline:hover {
  border-bottom-color: var(--color-primary-dark);
}

/* Responsive Images */
.responsive-img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ================================================
   14. RESPONSIVE DESIGN
   ================================================ */

/* Tablet (640px - 1023px) */
@media (max-width: 1023px) {
  :root {
    --font-size-4xl: 2.5rem;
    --font-size-3xl: 2rem;
    --font-size-2xl: 1.75rem;
  }

  .nav-sidebar {
    display: none;
  }

  .nav-mobile {
    display: flex;
  }

  main {
    margin-left: 0;
    padding-top: var(--header-height);
  }

  .section {
    padding: var(--space-2xl) 0;
  }

  .page-title {
    font-size: var(--font-size-xl);
    padding: var(--space-md) var(--space-lg);
    margin-bottom: var(--space-2xl);
  }

  .grid-cols-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .projects-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

/* Mobile (0 - 639px) */
@media (max-width: 639px) {
  :root {
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.75rem;
    --font-size-2xl: 1.5rem;
    --space-3xl: 3rem;
    --space-4xl: 4rem;
  }

  .container {
    padding: 0 var(--space-md);
  }

  .section {
    padding: var(--space-xl) 0;
  }

  .hero-content {
    padding: var(--space-2xl) var(--space-md);
  }

  .hero-title {
    font-size: clamp(1.5rem, 7vw, 2rem);
  }

  .hero-subtitle {
    font-size: clamp(1rem, 5vw, 1.25rem);
  }

  .hero-description {
    font-size: var(--font-size-base);
  }

  .btn-group {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
  }

  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }

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

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

  .card-with-logo {
    flex-direction: column;
    text-align: center;
  }

  .card-logo {
    margin: 0 auto;
  }

  .page-title {
    font-size: var(--font-size-lg);
    padding: var(--space-md);
    margin-bottom: var(--space-xl);
  }

  .name-title a {
    font-size: var(--font-size-base);
  }

  .name-title span {
    font-size: var(--font-size-xs);
  }

  .social-links {
    justify-content: center;
  }

  .contact-item {
    flex-direction: column;
    text-align: center;
  }
}

/* Desktop Large (1200px+) */
@media (min-width: 1200px) {
  .container {
    padding: 0 var(--space-2xl);
  }
}

/* ================================================
   15. ACCESSIBILITY
   ================================================ */

/* Skip to main content link */
.skip-to-main {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-md) var(--space-lg);
  text-decoration: none;
  z-index: 9999;
  transition: top var(--transition-fast);
}

.skip-to-main:focus {
  top: 0;
}

/* Focus visible styles */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

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

/* High contrast mode */
@media (prefers-contrast: high) {
  :root {
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
  }
}

/* Print Styles */
@media print {
  .nav-sidebar,
  .nav-mobile,
  .skip-to-main {
    display: none;
  }

  main {
    margin-left: 0;
  }

  .card {
    page-break-inside: avoid;
  }
}