/* Modern CSS Reset & Baseline Layering */
@layer reset, base, theme, layout, components, utilities;

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

  html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px; /* Offset for sticky header */
  }

  body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.6;
    overflow-x: hidden;
  }

  img, picture, svg, video {
    display: block;
    max-width: 100%;
  }

  input, button, textarea, select {
    font: inherit;
  }

  a {
    color: inherit;
    text-decoration: none;
  }

  ul, ol {
    list-style: none;
  }

  address {
    font-style: normal;
  }
}

@layer theme {
  :root {
    /* Fonts */
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

    /* Light Theme Palette (OKLCH) */
    --color-bg-light: oklch(98% 0.005 256);
    --color-bg-alt-light: oklch(95% 0.005 256);
    --color-text-primary-light: oklch(22% 0.015 256);
    --color-text-secondary-light: oklch(45% 0.02 256);
    --color-accent-light: oklch(62% 0.16 195);       /* Teal */
    --color-accent-glow-light: rgba(20, 160, 160, 0.15);
    --color-secondary-light: oklch(58% 0.18 290);    /* Violet */
    --color-border-light: rgba(0, 0, 0, 0.07);
    --color-card-bg-light: rgba(255, 255, 255, 0.55);
    --color-scrollbar-track-light: oklch(93% 0.005 256);
    --color-scrollbar-thumb-light: oklch(75% 0.01 256);

    /* Dark Theme Palette (OKLCH) */
    --color-bg-dark: oklch(14% 0.012 256);           /* Deep Slate */
    --color-bg-alt-dark: oklch(10% 0.01 256);         /* Slightly darker */
    --color-text-primary-dark: oklch(93% 0.005 256);
    --color-text-secondary-dark: oklch(70% 0.01 256);
    --color-accent-dark: oklch(75% 0.15 195);        /* Bright Teal */
    --color-accent-glow-dark: rgba(90, 230, 230, 0.2);
    --color-secondary-dark: oklch(72% 0.15 290);     /* Bright Violet */
    --color-border-dark: rgba(255, 255, 255, 0.06);
    --color-card-bg-dark: rgba(22, 22, 28, 0.55);
    --color-scrollbar-track-dark: oklch(10% 0.01 256);
    --color-scrollbar-thumb-dark: oklch(30% 0.01 256);

    /* Dynamic mappings using light-dark() */
    --color-bg: light-dark(var(--color-bg-light), var(--color-bg-dark));
    --color-bg-alt: light-dark(var(--color-bg-alt-light), var(--color-bg-alt-dark));
    --color-text-primary: light-dark(var(--color-text-primary-light), var(--color-text-primary-dark));
    --color-text-secondary: light-dark(var(--color-text-secondary-light), var(--color-text-secondary-dark));
    --color-accent: light-dark(var(--color-accent-light), var(--color-accent-dark));
    --color-accent-glow: light-dark(var(--color-accent-glow-light), var(--color-accent-glow-dark));
    --color-secondary: light-dark(var(--color-secondary-light), var(--color-secondary-dark));
    --color-border: light-dark(var(--color-border-light), var(--color-border-dark));
    --color-card-bg: light-dark(var(--color-card-bg-light), var(--color-card-bg-dark));
    
    --color-scrollbar-track: light-dark(var(--color-scrollbar-track-light), var(--color-scrollbar-track-dark));
    --color-scrollbar-thumb: light-dark(var(--color-scrollbar-thumb-light), var(--color-scrollbar-thumb-dark));

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.12), 0 0 30px var(--color-accent-glow);

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-xxl: 5rem;

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.16, 1, 0.3, 1);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-pill: 9999px;

    /* Global properties */
    color-scheme: light dark;
    scrollbar-color: var(--color-scrollbar-thumb) var(--color-scrollbar-track);
    scrollbar-width: thin;
  }

  /* HTML Theme attributes mapping for JS support */
  html[data-theme="light"] {
    --color-bg: var(--color-bg-light);
    --color-bg-alt: var(--color-bg-alt-light);
    --color-text-primary: var(--color-text-primary-light);
    --color-text-secondary: var(--color-text-secondary-light);
    --color-accent: var(--color-accent-light);
    --color-accent-glow: var(--color-accent-glow-light);
    --color-secondary: var(--color-secondary-light);
    --color-border: var(--color-border-light);
    --color-card-bg: var(--color-card-bg-light);
    --color-scrollbar-track: var(--color-scrollbar-track-light);
    --color-scrollbar-thumb: var(--color-scrollbar-thumb-light);
    color-scheme: light;
  }

  html[data-theme="dark"] {
    --color-bg: var(--color-bg-dark);
    --color-bg-alt: var(--color-bg-alt-dark);
    --color-text-primary: var(--color-text-primary-dark);
    --color-text-secondary: var(--color-text-secondary-dark);
    --color-accent: var(--color-accent-dark);
    --color-accent-glow: var(--color-accent-glow-dark);
    --color-secondary: var(--color-secondary-dark);
    --color-border: var(--color-border-dark);
    --color-card-bg: var(--color-card-bg-dark);
    --color-scrollbar-track: var(--color-scrollbar-track-dark);
    --color-scrollbar-thumb: var(--color-scrollbar-thumb-dark);
    color-scheme: dark;
  }
}

@layer base {
  body {
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
    transition: background-color var(--transition-slow), color var(--transition-normal);
  }

  h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.25;
    color: var(--color-text-primary);
  }

  p {
    color: var(--color-text-secondary);
    text-wrap: pretty;
  }

  /* Accessibility focus styling */
  :focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
  }

  button {
    cursor: pointer;
    border: none;
    background: none;
  }
}

@layer layout {
  .container {
    width: 100%;
    max-width: 1200px;
    margin-inline: auto;
    padding-inline: var(--space-md);
  }

  .section-padding {
    padding-block: clamp(4rem, 2rem + 8vw, 8rem);
  }

  .full-viewport {
    min-block-size: 100dvh;
    display: flex;
    align-items: center;
  }

  .alt-bg {
    background-color: var(--color-bg-alt);
    transition: background-color var(--transition-slow);
  }
}

@layer components {
  /* Glassmorphism Panel style */
  .glass-panel {
    background: var(--color-card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal), transform var(--transition-normal);
  }

  /* Sticky Header */
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: rgba(var(--color-bg), 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: padding var(--transition-normal), background-color var(--transition-slow);
    padding-block: var(--space-md);
  }

  .site-header.scrolled {
    padding-block: var(--space-xs);
    background: var(--color-card-bg);
    box-shadow: var(--shadow-sm);
  }

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

  .logo-link {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
  }

  .logo-accent {
    color: var(--color-accent);
    transition: color var(--transition-normal);
  }

  .main-nav {
    display: none; /* Hidden on mobile by default */
  }

  .nav-list {
    display: flex;
    gap: var(--space-lg);
  }

  .nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    position: relative;
    padding-block: var(--space-xs);
    transition: color var(--transition-normal);
  }

  .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-accent);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-normal);
  }

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

  .nav-link:hover::after,
  .nav-link.active::after {
    transform: scaleX(1);
    transform-origin: left;
  }

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

  /* Theme Toggle Button */
  .theme-toggle-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-pill);
    display: grid;
    place-items: center;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    background: var(--color-card-bg);
    transition: color var(--transition-normal), border-color var(--transition-normal), background-color var(--transition-normal);
  }

  .theme-toggle-btn:hover {
    color: var(--color-text-primary);
    border-color: var(--color-accent);
  }

  .theme-toggle-btn svg {
    width: 20px;
    height: 20px;
    grid-area: 1 / 1;
    transition: transform var(--transition-slow), opacity var(--transition-normal);
  }

  /* Show/hide icon based on theme */
  html[data-theme="dark"] .sun-icon { opacity: 0; transform: rotate(90deg) scale(0.5); }
  html[data-theme="dark"] .moon-icon { opacity: 1; transform: rotate(0) scale(1); }
  
  html[data-theme="light"] .sun-icon { opacity: 1; transform: rotate(0) scale(1); }
  html[data-theme="light"] .moon-icon { opacity: 0; transform: rotate(-90deg) scale(0.5); }

  /* Mobile menu button */
  .mobile-menu-btn {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 20px;
    z-index: 110;
  }

  .hamburger-line {
    width: 100%;
    height: 2px;
    background-color: var(--color-text-primary);
    transition: transform var(--transition-normal), opacity var(--transition-normal);
  }

  .mobile-menu-btn[aria-expanded="true"] .hamburger-line:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }
  .mobile-menu-btn[aria-expanded="true"] .hamburger-line:nth-child(2) {
    opacity: 0;
  }
  .mobile-menu-btn[aria-expanded="true"] .hamburger-line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  /* Buttons */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.75rem;
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: transform var(--transition-fast), box-shadow var(--transition-normal), background-color var(--transition-normal), border-color var(--transition-normal), color var(--transition-normal);
    min-block-size: 48px; /* Touch target */
  }

  .btn-sm {
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
    min-block-size: 38px;
  }

  .btn-primary {
    background-color: var(--color-accent);
    color: oklch(14% 0.012 256); /* Always legible contrasting dark text on primary */
    box-shadow: 0 4px 14px var(--color-accent-glow);
  }

  /* Contradictory text readability when hovered */
  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--color-accent-glow);
    filter: brightness(1.1);
  }

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

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

  .btn-outline {
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
  }

  .btn-outline:hover {
    background-color: var(--color-accent);
    color: oklch(14% 0.012 256);
    transform: translateY(-2px);
  }

  .btn-block {
    display: flex;
    width: 100%;
  }

  /* Badge styling */
  .badge {
    background-color: var(--color-accent-glow);
    color: var(--color-accent);
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.35rem 1rem;
    border-radius: var(--radius-pill);
    border: 1px solid rgba(var(--color-accent), 0.1);
    display: inline-block;
  }

  /* Hero Section */
  .hero-section {
    position: relative;
    padding-top: 100px;
    overflow: hidden;
    /* Fancy subtle background mesh gradient */
    background-image: 
      radial-gradient(circle at 10% 20%, var(--color-accent-glow) 0%, transparent 40%),
      radial-gradient(circle at 90% 80%, rgba(130, 80, 220, 0.08) 0%, transparent 45%);
  }

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

  .hero-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-md);
  }

  .hero-title {
    font-size: var(--h1-size, clamp(2.2rem, 1.2rem + 4dvw, 4rem));
    letter-spacing: -1.5px;
    margin-block-end: var(--space-xs);
  }

  .text-gradient {
    background: linear-gradient(135deg, var(--color-accent) 20%, var(--color-secondary) 80%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  .hero-subtitle {
    font-size: clamp(1.1rem, 1rem + 0.5vw, 1.3rem);
    line-height: 1.5;
    margin-block-end: var(--space-md);
  }

  .name-highlight {
    color: var(--color-text-primary);
    border-bottom: 2px solid var(--color-accent);
  }

  .hero-ctas {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
  }

  .hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--space-md);
    width: 100%;
  }

  /* 404 Error Page */
  .error-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-sm);
  }

  .error-code {
    font-size: clamp(4rem, 3rem + 8vw, 9rem);
    line-height: 1;
    letter-spacing: -2px;
    margin-block: var(--space-xs);
  }

  .error-title {
    font-size: clamp(1.4rem, 1.2rem + 1vw, 2rem);
  }

  .error-subtitle {
    max-width: 480px;
    font-size: clamp(1rem, 0.95rem + 0.3vw, 1.1rem);
    line-height: 1.6;
    color: var(--color-text-secondary);
    margin-block-end: var(--space-sm);
  }

  .error-section .hero-ctas {
    justify-content: center;
  }

  .stats-card {
    padding: var(--space-md);
    text-align: center;
    border-radius: var(--radius-md);
  }

  .stat-number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-accent);
    line-height: 1.1;
    margin-block-end: var(--space-xs);
  }

  .stat-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-secondary);
  }

  /* Mouse Scroll Indicator */
  .scroll-indicator {
    position: absolute;
    bottom: var(--space-md);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    opacity: 0.7;
    transition: opacity var(--transition-normal);
  }

  .scroll-indicator:hover {
    opacity: 1;
  }

  .mouse-icon {
    width: 24px;
    height: 40px;
    border: 2px solid var(--color-text-secondary);
    border-radius: 12px;
    position: relative;
  }

  .mouse-wheel {
    width: 4px;
    height: 8px;
    background-color: var(--color-accent);
    border-radius: 2px;
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll-wheel-anim 1.5s infinite;
  }

  .arrow-down {
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--color-text-secondary);
    border-bottom: 2px solid var(--color-text-secondary);
    transform: rotate(45deg);
    animation: arrow-down-anim 1.5s infinite;
  }

  @keyframes scroll-wheel-anim {
    0% { opacity: 0; transform: translate(-50%, 0); }
    40% { opacity: 1; }
    80% { opacity: 0; transform: translate(-50%, 14px); }
    100% { opacity: 0; }
  }

  @keyframes arrow-down-anim {
    0% { opacity: 0; transform: rotate(45deg) translate(-2px, -2px); }
    50% { opacity: 1; }
    100% { opacity: 0; transform: rotate(45deg) translate(4px, 4px); }
  }

  /* About Section Layout */
  .section-title {
    font-size: var(--h2-size, clamp(1.8rem, 1.2rem + 2dvw, 2.8rem));
    letter-spacing: -1px;
    margin-block-end: var(--space-xl);
    position: relative;
    display: inline-block;
  }

  .section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 4px;
    background: var(--color-accent);
    border-radius: var(--radius-pill);
  }

  .about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .about-text-card {
    padding: var(--space-lg);
  }

  .lead-text {
    font-size: clamp(1.1rem, 1.05rem + 0.1vw, 1.25rem);
    font-weight: 500;
    color: var(--color-text-primary);
    margin-block-end: var(--space-md);
  }

  .about-text-card p:not(:last-child) {
    margin-block-end: var(--space-md);
  }

  .about-info-card {
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: var(--space-md);
  }

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

  .info-list li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
  }

  .info-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background-color: var(--color-bg-alt);
    color: var(--color-accent);
    display: grid;
    place-items: center;
    flex-shrink: 0;
  }

  .info-icon svg {
    width: 18px;
    height: 18px;
  }

  .info-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    min-inline-size: 90px;
  }

  .info-value {
    font-size: 0.95rem;
    color: var(--color-text-primary);
    word-break: break-all;
  }

  /* Timeline (Experience) */
  .timeline {
    position: relative;
    max-width: 900px;
    margin-inline: auto;
  }

  /* Timeline center line */
  .timeline::before {
    content: '';
    position: absolute;
    top: 10px;
    bottom: 10px;
    left: 20px;
    width: 2px;
    background-color: var(--color-border);
  }

  .timeline-item {
    position: relative;
    margin-block-end: var(--space-xl);
    padding-inline-start: 50px;
  }

  .timeline-dot {
    position: absolute;
    left: 14px;
    top: 24px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background-color: var(--color-bg);
    border: 3px solid var(--color-accent);
    z-index: 2;
    transition: transform var(--transition-fast), background-color var(--transition-normal);
  }

  .timeline-item:hover .timeline-dot {
    transform: scale(1.3);
    background-color: var(--color-accent);
  }

  .timeline-date {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-block-end: var(--space-xs);
  }

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

  .timeline-content:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
  }

  .job-header {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: var(--space-xs);
    border-bottom: 1px solid var(--color-border);
    padding-block-end: var(--space-sm);
    margin-block-end: var(--space-sm);
  }

  .job-title {
    font-size: clamp(1.2rem, 1.1rem + 0.25vw, 1.4rem);
  }

  .job-company {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-secondary);
  }

  .job-location {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    font-weight: 500;
  }

  .job-bullets {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    margin-block-end: var(--space-md);
  }

  .job-bullets li {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    position: relative;
    padding-inline-start: 18px;
    text-wrap: pretty;
  }

  .job-bullets li::before {
    content: '•';
    color: var(--color-accent);
    position: absolute;
    left: 0;
    font-weight: bold;
  }

  .job-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .tech-tag {
    font-size: 0.8rem;
    font-weight: 600;
    background-color: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    padding: 0.2rem 0.65rem;
    border-radius: var(--radius-sm);
    transition: color var(--transition-normal), border-color var(--transition-normal);
  }

  .timeline-item:hover .tech-tag {
    border-color: rgba(var(--color-accent), 0.2);
  }

  /* Skills Section Styling */
  .skills-filter {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    justify-content: center;
    margin-block-end: var(--space-xl);
  }

  .filter-btn {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-pill);
    border: 1px solid var(--color-border);
    background-color: var(--color-card-bg);
    transition: var(--transition-fast);
    min-block-size: 40px; /* Accessible pointer height */
  }

  .filter-btn:hover {
    color: var(--color-text-primary);
    border-color: var(--color-accent);
  }

  .filter-btn.active {
    background-color: var(--color-accent);
    color: oklch(14% 0.012 256);
    border-color: var(--color-accent);
    box-shadow: 0 4px 12px var(--color-accent-glow);
  }

  .skills-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .skill-card {
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
  }

  .skill-card.hidden {
    display: none;
  }

  .skill-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
  }

  .skill-icon-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    border-bottom: 1px solid var(--color-border);
    padding-block-end: var(--space-sm);
  }

  .skill-icon-header svg {
    width: 24px;
    height: 24px;
    color: var(--color-accent);
  }

  .skill-icon-header h3 {
    font-size: 1.2rem;
  }

  .skill-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }

  .skill-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    border-bottom: 1px dashed var(--color-border);
    padding-block-end: 4px;
  }

  .proficiency-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
  }

  .proficiency-dot.expert {
    background-color: var(--color-accent);
    box-shadow: 0 0 8px var(--color-accent-glow);
  }

  .proficiency-dot.advanced {
    background-color: var(--color-secondary);
    box-shadow: 0 0 8px rgba(130, 80, 220, 0.3);
  }

  .legend {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin-block-start: var(--space-lg);
    font-size: 0.85rem;
    color: var(--color-text-secondary);
  }

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

  /* Education Section Grid */
  .education-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    max-width: 900px;
    margin-inline: auto;
  }

  .education-card {
    padding: var(--space-lg);
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
  }

  .education-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
  }

  .edu-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background-color: var(--color-accent-glow);
    color: var(--color-accent);
    display: grid;
    place-items: center;
    flex-shrink: 0;
  }

  .edu-icon svg {
    width: 24px;
    height: 24px;
  }

  .edu-details {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }

  .edu-date {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-accent);
  }

  .edu-degree {
    font-size: 1.15rem;
  }

  .edu-school {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
  }

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

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

  .contact-info h3 {
    font-size: 1.6rem;
    letter-spacing: -0.5px;
  }

  .contact-intro {
    font-size: 1.05rem;
    margin-block-end: var(--space-xs);
  }

  .contact-cards-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
  }

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

  .contact-info-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background-color: var(--color-bg-alt);
    color: var(--color-accent);
    display: grid;
    place-items: center;
    flex-shrink: 0;
  }

  .contact-info-icon svg {
    width: 20px;
    height: 20px;
  }

  .contact-info-item h4 {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-block-end: 2px;
  }

  .contact-info-item p,
  .contact-info-item address {
    font-size: 0.95rem;
    color: var(--color-text-primary);
  }

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

  /* Social Icons */
  .social-links {
    display: flex;
    gap: var(--space-sm);
    margin-block-start: var(--space-sm);
  }

  .social-links a {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    display: grid;
    place-items: center;
    color: var(--color-text-secondary);
    background: var(--color-card-bg);
    transition: var(--transition-fast);
  }

  .social-links a:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-3px);
    box-shadow: 0 4px 12px var(--color-accent-glow);
  }

  .social-links a svg {
    width: 20px;
    height: 20px;
  }

  /* Forms styling */
  .contact-form-container {
    padding: var(--space-lg);
  }

  .contact-form-container h3 {
    font-size: 1.4rem;
    margin-block-end: var(--space-md);
  }

  .form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-block-end: var(--space-md);
  }

  .form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }

  .form-group input,
  .form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
  }

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

  .form-group input.invalid,
  .form-group textarea.invalid {
    border-color: oklch(60% 0.18 20); /* Reddish */
  }

  .error-msg {
    font-size: 0.8rem;
    color: oklch(60% 0.18 20);
    min-block-size: 1lh;
  }

  /* Loading Spinner for Form Submission */
  .loading-spinner {
    width: 20px;
    height: 20px;
    animation: rotate-spinner 2s linear infinite;
    margin-inline-start: var(--space-xs);
  }

  .loading-spinner .path {
    stroke: currentColor;
    stroke-linecap: round;
    animation: dash-spinner 1.5s ease-in-out infinite;
  }

  .hidden {
    display: none !important;
  }

  @keyframes rotate-spinner {
    100% { transform: rotate(360deg); }
  }

  @keyframes dash-spinner {
    0% { stroke-dasharray: 1, 150; stroke-dashoffset: 0; }
    50% { stroke-dasharray: 90, 150; stroke-dashoffset: -35; }
    100% { stroke-dasharray: 90, 150; stroke-dashoffset: -124; }
  }

  .form-feedback {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    margin-block-start: var(--space-md);
    animation: slide-down var(--transition-normal);
  }

  .success-feedback {
    background-color: rgba(40, 200, 120, 0.1);
    color: oklch(65% 0.18 150);
    border: 1px solid rgba(40, 200, 120, 0.2);
  }

  .error-feedback {
    background-color: rgba(220, 60, 60, 0.1);
    color: oklch(60% 0.2 25);
    border: 1px solid rgba(220, 60, 60, 0.2);
  }

  @keyframes slide-down {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
  }

  /* Footer styling */
  .site-footer {
    padding-block: var(--space-xl);
    border-top: 1px solid var(--color-border);
    background-color: var(--color-bg-alt);
    transition: background-color var(--transition-slow), border-color var(--transition-normal);
    text-align: center;
  }

  .footer-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
  }

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

  .footer-meta {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    opacity: 0.7;
    display: flex;
    gap: var(--space-xs);
  }

  .separator {
    opacity: 0.5;
  }
}

@layer utilities {
  /* Scroll Reveal animation setups */
  .scroll-reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
  }

  .scroll-reveal-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
  }

  .scroll-reveal.active,
  .scroll-reveal-up.active {
    opacity: 1;
    transform: translateY(0);
  }

  /* Delay utilities */
  .scroll-reveal-up:nth-child(1) { transition-delay: 0.1s; }
  .scroll-reveal-up:nth-child(2) { transition-delay: 0.25s; }
  .scroll-reveal-up:nth-child(3) { transition-delay: 0.4s; }
  .scroll-reveal-up:nth-child(4) { transition-delay: 0.55s; }
}

/* RESPONSIVE MEDIA QUERIES */

/* Small Devices (Mobile landscape / Tablet portrait) */
@media (min-width: 600px) {
  .hero-stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .about-grid {
    grid-template-columns: 1.8fr 1.2fr;
  }

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

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

  .skill-list {
    grid-template-columns: repeat(2, 1fr);
    column-gap: var(--space-md);
  }
}

/* Medium Devices (Tablets landscape / Small Desktop) */
@media (min-width: 768px) {
  .site-header {
    padding-block: var(--space-md);
  }

  .main-nav {
    display: block;
  }

  .mobile-menu-btn {
    display: none;
  }

  .hero-grid {
    grid-template-columns: 1.3fr 0.7fr;
    gap: var(--space-xxl);
  }

  .hero-section {
    padding-top: 120px;
  }

  .hero-stats {
    grid-template-columns: 1fr;
    gap: var(--space-md);
    justify-self: end;
    width: 200px;
  }

  .timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .timeline-item {
    width: 50%;
    padding-inline: var(--space-lg);
  }

  .timeline-item:nth-child(odd) {
    left: 0;
    text-align: right;
  }

  .timeline-item:nth-child(even) {
    left: 50%;
  }

  .timeline-dot {
    left: 50%;
    transform: translateX(-50%);
    top: 28px;
  }

  .timeline-item:nth-child(odd) .timeline-dot {
    left: auto;
    right: -7px;
    transform: none;
  }

  .timeline-item:nth-child(even) .timeline-dot {
    left: -7px;
    transform: none;
  }

  .timeline-item:nth-child(odd):hover .timeline-dot,
  .timeline-item:nth-child(even):hover .timeline-dot {
    transform: scale(1.3);
  }

  .timeline-item:nth-child(odd) .job-header {
    flex-direction: column;
    align-items: flex-end;
  }

  .timeline-item:nth-child(odd) .job-bullets li {
    padding-inline-start: 0;
    padding-inline-end: 18px;
  }

  .timeline-item:nth-child(odd) .job-bullets li::before {
    left: auto;
    right: 0;
  }

  .timeline-item:nth-child(odd) .job-tags {
    justify-content: flex-end;
  }

  .contact-grid {
    grid-template-columns: 1.1fr 0.9fr;
  }
}

/* Large Devices (Desktops) */
@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1.5fr 0.5fr;
  }

  .hero-stats {
    width: 240px;
  }

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

  .skill-list {
    grid-template-columns: 1fr;
  }
}

/* Accessibility: Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-delay: 0s !important;
    animation-duration: 0s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0s !important;
    scroll-behavior: auto !important;
  }
  
  .scroll-reveal,
  .scroll-reveal-up {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* Mobile Nav Overlay styling when active */
@media (max-width: 767px) {
  .main-nav {
    position: fixed;
    top: 76px;
    left: 0;
    width: 100%;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md) var(--space-md) var(--space-xl);
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    transition: transform var(--transition-normal);
    display: block;
    z-index: 99;
  }

  .main-nav.mobile-active {
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
  }

  .nav-link {
    font-size: 1.2rem;
  }
}