/*
  Kawser Ahmed Portfolio — Enhanced CSS
  Modern design system with improved performance, accessibility, and visual polish
*/

/* ==================== CSS LAYERS ==================== */
@layer reset, tokens, base, components, utilities;

/* ==================== DESIGN TOKENS ==================== */
@layer tokens {
  :root {
    /* Colors - Light Mode */
    --bg: #f8f9fa;
    --card: #ffffff;
    --accent: #0f766e;
    --accent-2: #0891b2;
    --accent-hover: #0d5f58;
    --text: #0f172a;
    --text-secondary: #475569;
    --muted: #64748b;
    --border: #e2e8f0;

    /* Shadows - Enhanced system */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    --shadow-accent: 0 10px 30px rgba(15, 118, 110, 0.15);

    /* Glass effects */
    --glass: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.18);

    /* Spacing system */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Border radius */
    --radius-sm: 0.375rem;
    --radius: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms;
    --transition-base: 200ms;
    --transition-slow: 300ms;
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* Z-index scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-tooltip: 1070;
  }

  /* Dark Mode */
  :root[data-theme="dark"] {
    --bg: #0b0f12;
    --card: #121820;
    --accent: #14b8a6;
    --accent-2: #06b6d4;
    --accent-hover: #0d9488;
    --text: #f1f5f9;
    --text-secondary: #cbd5e1;
    --muted: #94a3b8;
    --border: #1e293b;

    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.5);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.5), 0 2px 4px -2px rgb(0 0 0 / 0.5);
    --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.5), 0 4px 6px -4px rgb(0 0 0 / 0.5);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.5), 0 8px 10px -6px rgb(0 0 0 / 0.5);
    --shadow-xl: 0 25px 50px -12px rgb(0 0 0 / 0.6);
    --shadow-accent: 0 10px 30px rgba(20, 184, 166, 0.25);

    --glass: rgba(18, 24, 32, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
  }
}

/* ==================== BASE STYLES ==================== */
@layer base {

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

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

  @media (prefers-reduced-motion: reduce) {
    html {
      scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 0.01ms !important;
    }
  }

  body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: var(--line-height-normal);
    color: var(--text);
    background: var(--bg);
    position: relative;
    transition: background-color var(--transition-slow) var(--ease-in-out),
      color var(--transition-slow) var(--ease-in-out);
  }

  /* Improved background gradients */
  body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
      radial-gradient(circle at 20% 20%, rgba(15, 118, 110, 0.05) 0%, transparent 50%),
      radial-gradient(circle at 80% 80%, rgba(8, 145, 178, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
  }

  :root[data-theme="dark"] body::before {
    background:
      radial-gradient(circle at 20% 20%, rgba(20, 184, 166, 0.08) 0%, transparent 50%),
      radial-gradient(circle at 80% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 50%);
  }

  /* All content above background */
  body>* {
    position: relative;
    z-index: 1;
  }

  img {
    max-width: 100%;
    height: auto;
    display: block;
  }

  /* Typography */
  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    line-height: var(--line-height-tight);
    margin: 0 0 var(--space-md);
    font-weight: 700;
  }

  h1 {
    font-size: clamp(2rem, 5vw, 2.5rem);
    font-weight: 800;
  }

  h2 {
    font-size: clamp(1.5rem, 4vw, 1.875rem);
  }

  h3 {
    font-size: clamp(1.25rem, 3vw, 1.5rem);
  }

  p {
    margin: 0 0 var(--space-md);
    color: var(--text);
  }

  a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition-base) var(--ease-in-out);
  }

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

/* ==================== COMPONENTS ==================== */
@layer components {

  /* Container */
  .container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
  }

  .section {
    padding: clamp(3rem, 10vw, 5rem) 0;
  }

  /* Accessibility */
  .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
  }

  .skip-link {
    position: absolute;
    left: -9999px;
    top: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    background: var(--accent);
    color: white;
    border-radius: var(--radius);
    z-index: var(--z-tooltip);
    font-weight: 600;
  }

  .skip-link:focus {
    left: var(--space-md);
  }

  :focus-visible {
    outline: 3px solid var(--accent-2);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
  }

  /* Header - Enhanced sticky behavior */
  .site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: var(--glass);
    backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid transparent;
    transition:
      box-shadow var(--transition-slow) var(--ease-in-out),
      border-color var(--transition-slow) var(--ease-in-out),
      background-color var(--transition-slow) var(--ease-in-out);
  }

  .site-header.is-sticky {
    box-shadow: var(--shadow-md);
    border-bottom-color: var(--border);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: var(--space-md);
  }

  /* Logo - Enhanced with gradient */
  .logo {
    display: inline-flex;
    place-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    color: white;
    font-weight: 800;
    font-size: 1.125rem;
    letter-spacing: 0.5px;
    font-style: italic;
    text-decoration: none;
    transition: transform var(--transition-base) var(--ease-bounce);
    box-shadow: var(--shadow-accent);
  }

  .logo:hover {
    transform: scale(1.05) rotate(-5deg);
  }

  /* Navigation */
  .nav {
    position: relative;
  }

  .nav-list {
    list-style: none;
    display: none;
    gap: var(--space-lg);
    margin: 0;
    padding: 0;
  }

  @media (min-width: 768px) {
    .nav-list {
      display: flex;
    }
  }

  .nav-link {
    position: relative;
    color: var(--text);
    text-decoration: none;
    font-weight: 600;
    padding: var(--space-xs) 0;
    transition: color var(--transition-base) var(--ease-in-out);
  }

  .nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -4px;
    height: 2px;
    width: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-slow) var(--ease-out);
    border-radius: var(--radius-full);
  }

  .nav-link:hover,
  .nav-link.active,
  .nav-link[aria-current="true"] {
    color: var(--accent);
  }

  .nav-link:hover::after,
  .nav-link.active::after,
  .nav-link[aria-current="true"]::after {
    transform: scaleX(1);
  }

  /* Mobile Navigation */
  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: 0;
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius);
    transition: background-color var(--transition-base) var(--ease-in-out);
  }

  .nav-toggle:hover {
    background: color-mix(in srgb, var(--accent) 10%, transparent);
  }

  .nav-toggle-bar {
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: var(--radius-full);
    display: block;
    transition: transform var(--transition-base) var(--ease-in-out),
      opacity var(--transition-base) var(--ease-in-out);
  }

  @media (min-width: 768px) {
    .nav-toggle {
      display: none;
    }
  }

  .nav.is-open .nav-list {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: calc(100% + var(--space-md));
    right: 0;
    background: var(--card);
    padding: var(--space-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    gap: var(--space-sm);
    min-width: 200px;
    border: 1px solid var(--border);
  }

  /* Download CV Button Animation on Mobile Menu Open */
  @media (max-width: 767px) {
    .download-btn {
      transition: all 0.3s ease;
      white-space: nowrap;
    }

    .nav.is-open ~ .download-btn span {
      display: none;
    }

    .nav.is-open ~ .download-btn::after {
      content: "CV";
      font-size: 16px;
      font-weight: 600;
      display: inline-block;
    }

    .nav.is-open ~ .download-btn {
      padding: 12px 20px;
      min-width: 60px;
    }
  }

  /* Theme Toggle - Enhanced */
  .theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: 0;
    border-radius: var(--radius-full);
    background: var(--card);
    cursor: pointer;
    font-size: 1.25rem;
    transition:
      background-color var(--transition-base) var(--ease-in-out),
      transform var(--transition-base) var(--ease-bounce),
      box-shadow var(--transition-base) var(--ease-in-out);
    box-shadow: var(--shadow);
  }

  .theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    background: color-mix(in srgb, var(--card) 90%, var(--accent));
    box-shadow: var(--shadow-md);
  }

  .theme-toggle:active {
    transform: scale(0.95);
  }

  /* Buttons - Enhanced with better states */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-lg);
    text-decoration: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    border: 0;
    transition:
      transform var(--transition-base) var(--ease-out),
      box-shadow var(--transition-base) var(--ease-out),
      background-color var(--transition-base) var(--ease-in-out);
    position: relative;
    overflow: hidden;
  }

  .btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width var(--transition-slow) var(--ease-out),
      height var(--transition-slow) var(--ease-out);
  }

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

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

  .btn:active {
    transform: translateY(0);
  }

  .btn-primary {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    color: white;
    box-shadow: var(--shadow-accent);
  }

  .btn-primary:hover {
    box-shadow: var(--shadow-lg), var(--shadow-accent);
  }

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

  .btn-secondary:hover {
    background: color-mix(in srgb, var(--accent) 10%, transparent);
  }

  /* Social Links - Universal */
  .social-list {
    display: flex;
    gap: var(--space-md);
    list-style: none;
    padding: 0;
    margin: var(--space-lg) 0 0;
    align-items: center;
  }

  .social-list a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    color: var(--muted);
    background: var(--card);
    border-radius: var(--radius-full);
    transition:
      color var(--transition-base) var(--ease-in-out),
      transform var(--transition-base) var(--ease-bounce),
      background-color var(--transition-base) var(--ease-in-out),
      box-shadow var(--transition-base) var(--ease-in-out);
    text-decoration: none;
    box-shadow: var(--shadow-sm);
  }

  .social-list a:hover,
  .social-list a:focus-visible {
    color: var(--accent);
    background: color-mix(in srgb, var(--accent) 10%, var(--card));
    transform: translateY(-4px) scale(1.05);
    box-shadow: var(--shadow-md);
  }

  .social-list svg {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
  }

  /* Hero Section - Enhanced */
  .hero {
    padding: clamp(4rem, 12vw, 8rem) 0;
  }

  .hero-inner {
    display: grid;
    gap: var(--space-3xl);
    align-items: center;
  }

  @media (min-width: 900px) {
    .hero-inner {
      grid-template-columns: 1.2fr 0.8fr;
    }
  }

  .hero-title {
    letter-spacing: -0.02em;
    margin-bottom: var(--space-sm);
    background: linear-gradient(135deg, var(--text) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  .hero-highlight {
    color: var(--accent);
    font-weight: 600;
    font-size: 1.05rem;
    margin-bottom: var(--space-xs);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
  }

  .hero-role {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 1.125rem;
    margin-bottom: var(--space-md);
  }

  .hero-tagline {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
    min-height: 48px;
  }

  .hero-ctas {
    display: flex;
    gap: var(--space-md);
    margin: var(--space-xl) 0 0;
    flex-wrap: wrap;
  }

  .hero-visual {
    position: relative;
    display: inline-block;
    border-radius: var(--radius-full);
    overflow: hidden;
  }

  .hero-visual::before {
    content: '';
    position: absolute;
    inset: -4px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    border-radius: var(--radius-full);
    z-index: -1;
    opacity: 0.5;
    filter: blur(20px);
    transition: opacity var(--transition-slow) var(--ease-in-out);
  }

  .hero-visual:hover::before {
    opacity: 0.8;
  }

  .hero-visual img {
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-xl);
    transition:
      transform var(--transition-slow) var(--ease-out),
      filter var(--transition-slow) var(--ease-in-out);
    cursor: zoom-in;
  }

  .hero-visual img:hover {
    transform: scale(1.05);
  }

  .hero-visual.is-zoomed img {
    transform: scale(1.15);
    cursor: zoom-out;
  }

  /* Badge Animations */
  .hackathon-badge-icon svg {
    animation: hackathonPulse 1.8s ease-in-out infinite;
    filter: drop-shadow(0 0 6px currentColor);
  }

  @keyframes hackathonPulse {

    0%,
    100% {
      transform: scale(1) translateY(0);
      filter: drop-shadow(0 0 6px currentColor);
    }

    50% {
      transform: scale(1.1) translateY(-2px);
      filter: drop-shadow(0 0 14px currentColor);
    }
  }

  .award-badge-icon svg {
    animation: awardGlow 2s ease-in-out infinite;
    filter: drop-shadow(0 0 8px currentColor);
  }

  @keyframes awardGlow {

    0%,
    100% {
      transform: scale(1);
      filter: drop-shadow(0 0 8px currentColor);
    }

    50% {
      transform: scale(1.08);
      filter: drop-shadow(0 0 16px currentColor);
    }
  }

  /* About Section */
  .about-grid {
    display: grid;
    gap: var(--space-3xl);
    align-items: center;
  }

  @media (min-width: 900px) {
    .about-grid {
      grid-template-columns: 0.9fr 1.1fr;
    }
  }

  .about-photo img {
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-xl);
  }

  .about-edu {
    color: var(--muted);
    font-weight: 600;
  }

  .about-facts {
    list-style: disc;
    margin: var(--space-md) 0 0 var(--space-xl);
    color: var(--muted);
  }

  .about-facts li {
    margin-bottom: var(--space-sm);
  }

  /* Skills - Enhanced Grid */
  .skills-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
    padding: 0;
    list-style: none;
  }
  
  @media (max-width: 768px) {
    .skills-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }
  
  @media (max-width: 480px) {
    .skills-grid {
      grid-template-columns: repeat(1, 1fr);
    }
  }

  .skill-badge {
    background: var(--card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg) var(--space-md);
    box-shadow: var(--shadow);
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    text-align: center;
    transform: translateY(20px);
    opacity: 0;
    transition:
      transform var(--transition-slow) var(--ease-out),
      opacity var(--transition-slow) var(--ease-out),
      box-shadow var(--transition-base) var(--ease-in-out);
    border: 1px solid var(--border);
  }

  .skill-badge:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
  }

  .skill-badge.is-visible {
    transform: translateY(0);
    opacity: 1;
  }

  /* Projects - Enhanced Cards */
  .projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-xl);
    align-items: start;
  }

  .project-card {
    background: var(--card);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition:
      transform var(--transition-slow) var(--ease-out),
      box-shadow var(--transition-slow) var(--ease-out);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    height: 100%;
    border: 1px solid var(--border);
  }

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

  .project-media {
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    overflow: hidden;
    position: relative;
  }

  :root[data-theme="dark"] .project-media {
    background: linear-gradient(135deg, #082f49 0%, #0c4a6e 100%);
  }

  .project-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--transition-slow) var(--ease-out);
  }

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

  .project-body {
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    flex: 1;
  }

  .project-title {
    font-size: 1.125rem;
    margin: 0;
    color: var(--text);
  }

  .project-summary {
    color: var(--muted);
    margin: 0;
    line-height: var(--line-height-relaxed);
    flex: 1;
  }

  .project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs) var(--space-sm);
    align-items: center;
  }

  .tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    background: color-mix(in srgb, var(--accent-2) 15%, transparent);
    color: var(--accent-2);
    border-radius: var(--radius-full);
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
    font-weight: 600;
    line-height: 1;
    white-space: nowrap;
    transition:
      transform var(--transition-base) var(--ease-out),
      background-color var(--transition-base) var(--ease-in-out);
  }

  :root[data-theme="dark"] .tag {
    background: color-mix(in srgb, var(--accent) 20%, transparent);
    color: var(--accent);
  }

  .tag:hover {
    transform: translateY(-2px);
    background: color-mix(in srgb, var(--accent-2) 25%, transparent);
  }

  .project-actions {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-md);
  }

  /* Education */
  .education-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: var(--space-lg);
  }

  .education-card {
    background: var(--card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: var(--space-xl);
    display: flex;
    gap: var(--space-lg);
    align-items: flex-start;
    transition:
      transform var(--transition-base) var(--ease-out),
      box-shadow var(--transition-base) var(--ease-out);
    border: 1px solid var(--border);
  }

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

  .education-icon {
    flex-shrink: 0;
    color: var(--accent);
    opacity: 0.85;
  }

  .education-content {
    flex: 1;
    display: grid;
    gap: var(--space-sm);
  }

  .education-degree {
    margin: 0;
    font-size: 1.125rem;
    font-weight: 700;
  }

  .education-school {
    margin: 0;
    color: var(--muted);
    font-weight: 600;
  }

  .education-date {
    margin: 0;
    color: var(--accent);
    font-size: 0.9375rem;
    font-weight: 600;
  }

  .education-notes {
    margin: 0;
    color: var(--muted);
    line-height: var(--line-height-relaxed);
  }

  .experience-details {
    margin: var(--space-md) 0 0 0;
    padding-left: var(--space-xl);
    list-style: disc;
    color: var(--text);
  }

  .experience-details li {
    margin-bottom: var(--space-sm);
    line-height: var(--line-height-relaxed);
  }

  /* Modal - Enhanced */
  .modal {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    overflow-y: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
  }

  .modal.hidden {
    display: none;
  }

  .modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    opacity: 0;
    transition: opacity var(--transition-slow) var(--ease-in-out);
    z-index: var(--z-modal-backdrop);
  }

  .modal.open .modal-overlay {
    opacity: 1;
  }

  .modal-content {
    position: relative;
    background: var(--card);
    width: 100%;
    max-width: 900px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    transform: scale(0.95) translateY(20px);
    opacity: 0;
    transition:
      transform var(--transition-slow) var(--ease-out),
      opacity var(--transition-slow) var(--ease-out);
    z-index: var(--z-modal);
    border: 1px solid var(--border);
  }

  .modal.open .modal-content {
    transform: scale(1) translateY(0);
    opacity: 1;
  }

  .modal-body {
    padding: var(--space-2xl);
  }

  .modal-close {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    line-height: 1;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    cursor: pointer;
    color: var(--muted);
    transition:
      background-color var(--transition-base) var(--ease-in-out),
      color var(--transition-base) var(--ease-in-out),
      transform var(--transition-base) var(--ease-out);
    box-shadow: var(--shadow);
  }

  .modal-close:hover {
    background: color-mix(in srgb, var(--accent) 10%, var(--card));
    color: var(--accent);
    transform: scale(1.1) rotate(90deg);
  }

  .modal-media img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-top: var(--space-lg);
  }

  .modal-links {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-lg);
    flex-wrap: wrap;
  }

  .modal-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs) var(--space-sm);
    align-items: center;
    margin: var(--space-lg) 0;
  }

  /* Contact Section - Enhanced */
  .contact-inner {
    display: grid;
    gap: var(--space-3xl);
    align-items: start;
  }

  @media (min-width: 900px) {
    .contact-inner {
      grid-template-columns: 1fr 1fr;
    }
  }

  .contact-email {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: 1.125rem;
    font-weight: 700;
    margin: var(--space-lg) 0;
  }

  .contact-email svg {
    width: 28px;
    height: 28px;
    color: var(--accent);
    flex-shrink: 0;
  }

  .contact-email a {
    color: var(--text);
    text-decoration: none;
    transition: color var(--transition-base) var(--ease-in-out);
  }

  .contact-email a:hover {
    color: var(--accent);
  }

  .contact-actions {
    display: flex;
    gap: var(--space-md);
    align-items: center;
    flex-wrap: wrap;
  }

  .contact-form {
    background: var(--card);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
  }

  .form-field {
    display: grid;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
  }

  .form-field label {
    font-weight: 600;
    color: var(--text);
  }

  input,
  textarea {
    padding: var(--space-md);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    font: inherit;
    background: var(--card);
    color: var(--text);
    transition:
      border-color var(--transition-base) var(--ease-in-out),
      box-shadow var(--transition-base) var(--ease-in-out);
  }

  input:focus,
  textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent);
    outline: none;
  }

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

  .form-status {
    margin-top: var(--space-md);
    color: var(--muted);
    min-height: 24px;
    font-size: 0.9375rem;
  }

  /* Footer */
  .site-footer {
    padding: var(--space-3xl) 0;
    color: var(--muted);
    font-size: 0.9375rem;
    text-align: center;
    border-top: 1px solid var(--border);
    margin-top: var(--space-3xl);
  }

  .site-footer .footer-social {
    justify-content: center;
    margin: var(--space-lg) 0;
  }

  .site-footer nav {
    display: flex;
    gap: var(--space-xl);
    align-items: center;
    justify-content: center;
    margin-top: var(--space-md);
    flex-wrap: wrap;
  }

  .site-footer a {
    color: var(--muted);
    text-decoration: none;
    transition: color var(--transition-base) var(--ease-in-out);
  }

  .site-footer a:hover {
    color: var(--accent);
  }

  .back-to-top {
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-slow) var(--ease-in-out);
  }

  .back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
  }

  /* Reveal Animations */
  .reveal {
    transform: translateY(30px);
    opacity: 0;
    transition:
      transform var(--transition-slow) var(--ease-out),
      opacity var(--transition-slow) var(--ease-out);
  }

  .reveal.is-visible {
    transform: translateY(0);
    opacity: 1;
  }

  .hero.reveal {
    animation: fadeUpHero 0.8s var(--ease-out) forwards;
  }

  @keyframes fadeUpHero {
    from {
      opacity: 0;
      transform: translateY(30px);
    }

    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}

/* ==================== UTILITIES ==================== */
@layer utilities {
  .no-scroll {
    overflow: hidden;
  }

  .muted,
  .text-muted {
    color: var(--muted);
  }
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 767px) {
  .hero-text {
    text-align: center;
  }

  .hero-highlight {
    justify-content: center;
  }

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

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

  .section {
    padding: var(--space-3xl) 0;
  }

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

  .about-grid {
    text-align: center;
  }

  .about-photo {
    display: flex;
    justify-content: center;
  }

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

  .contact-email {
    justify-content: center;
    flex-wrap: wrap;
  }

  .contact-actions {
    justify-content: center;
  }

  .modal-body {
    padding: var(--space-xl);
  }
}

/* ==================== PRINT STYLES ==================== */
@media print {

  .site-header,
  .theme-toggle,
  .nav-toggle,
  .back-to-top,
  .modal {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

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