/* Design Tokens */
:root {
    --bg: #0a0e1a;
    --surface: #131827;
    --text: #e8eaf4;
    --muted: #9ca3af;
    --accent: #818cf8;
    --accent-2: #fbbf24;
    --link: #a78bfa;
    --stroke: #1e293b;
    --focus: #c4b5fd;
  }
  
  /* Light mode */
  @media (prefers-color-scheme: light) {
    :root {
      --bg: #f8fafc;
      --surface: #ffffff;
      --text: #1e293b;
      --muted: #64748b;
      --accent: #6366f1;
      --accent-2: #f59e0b;
      --link: #8b5cf6;
      --stroke: #e2e8f0;
      --focus: #a78bfa;
    }
  }
  
  /* Base Reset */
  * {
    box-sizing: border-box;
  }
  
  html {
    scroll-behavior: smooth;
  }
  
  body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }
  
  /* Typography */
  h1, h2, h3, h4, h5, h6 {
    font-family: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
    font-weight: 600;
    line-height: 1.2;
    margin: 0 0 1rem 0;
  }
  
  h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
  h2 { font-size: clamp(1.5rem, 4vw, 2.5rem); }
  h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
  
  p {
    margin: 0 0 1rem 0;
  }
  
  /* Links */
  a {
    color: var(--link);
    text-decoration: none;
    transition: color 0.2s ease;
  }
  
  a:hover {
    color: var(--accent);
  }
  
  /* Focus States */
  :focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 2px;
    border-radius: 4px;
  }
  
  /* Accessibility */
  @media (prefers-reduced-motion: reduce) {
    * {
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 0.01ms !important;
    }
    
    .cursor::after {
      animation: none !important;
    }
  }
  
  /* Utility Classes */
  .container {
    max-width: 880px;
    margin: 0 auto;
    padding: 0 1.5rem;
  }
  
  .section {
    padding: 4rem 0;
  }
  
  @media (max-width: 768px) {
    .section {
      padding: 2rem 0;
    }
  }
  
  /* Terminal Component Styles */
  .terminal {
    background: var(--surface);
    border: 1px solid var(--stroke);
    border-radius: 8px;
    padding: 1rem 1.5rem;
    font-family: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    position: relative;
    overflow: hidden;
  }
  
  .terminal::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0.3;
  }
  
  .cursor::after {
    content: '▊';
    color: var(--accent);
    animation: caret 1s steps(1, end) infinite;
  }
  
  @keyframes caret {
    0%, 49% { opacity: 1; }
    50%, 100% { opacity: 0; }
  }
  
  /* Card Styles */
  .card {
    background: var(--surface);
    border: 1px solid var(--stroke);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.2s ease;
  }
  
  .card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  }
  
  /* Button Styles */
  .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--accent);
    border-radius: 8px;
    background: transparent;
    color: var(--text);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
  }
  
  .btn:hover {
    background: var(--accent);
    color: var(--bg);
    transform: translateY(-1px);
  }
  
  .btn-secondary {
    border-color: var(--stroke);
    color: var(--muted);
  }
  
  .btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: transparent;
  }
  
  /* Badge Styles */
  .badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--surface);
    border: 1px solid var(--stroke);
    border-radius: 999px;
    font-size: 0.8rem;
    color: var(--muted);
    transition: all 0.2s ease;
  }
  
  .badge:hover {
    border-color: var(--accent);
    color: var(--accent);
  }
  
  /* Grid Layouts */
  .grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }
  
  @media (max-width: 768px) {
    .grid-2 {
      grid-template-columns: 1fr;
      gap: 1.5rem;
    }
  }
  
  .grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
  
  @media (max-width: 768px) {
    .grid-3 {
      grid-template-columns: 1fr;
      gap: 1rem;
    }
  }
  
  /* Header Styles */
  .header {
    position: sticky;
    top: 0;
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--stroke);
    z-index: 100;
    padding: 1rem 0;
  }
  
  @media (prefers-color-scheme: light) {
    .header {
      background: rgba(248, 250, 252, 0.95);
    }
  }
  
  /* Navigation Active States */
  .header nav a[aria-current="page"] {
    color: var(--accent) !important;
    font-weight: 500;
  }
  
  .header nav a[aria-current="page"]:hover {
    color: var(--accent) !important;
  }
  
  /* Mobile Menu Styles */
  .burger-menu-btn {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 30px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 10;
  }
  
  .burger-line {
    width: 100%;
    height: 3px;
    background: var(--text);
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
  }
  
  .burger-menu-btn.active .burger-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
  }
  
  .burger-menu-btn.active .burger-line:nth-child(2) {
    opacity: 0;
  }
  
  .burger-menu-btn.active .burger-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
  }
  
  .mobile-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--stroke);
    padding: 1rem 0;
    transform: translateY(-100%);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 99;
  }
  
  .mobile-menu:not(.hidden) {
    transform: translateY(0);
    opacity: 1;
  }
  
  .mobile-nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .mobile-nav-link {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--muted);
    text-decoration: none;
    transition: all 0.2s ease;
    border-radius: 0.375rem;
    margin: 0 1rem;
  }
  
  .mobile-nav-link:hover {
    color: var(--text);
    background: var(--surface);
  }
  
  .mobile-nav-link[aria-current="page"] {
    color: var(--accent);
    background: var(--surface);
    font-weight: 500;
  }
  
  @media (min-width: 768px) {
    .mobile-menu {
      display: none !important;
    }
  }
  
  /* Footer Styles */
  .footer {
    border-top: 1px solid var(--stroke);
    padding: 2rem 0;
    margin-top: 4rem;
    text-align: center;
    color: var(--muted);
  }
  
  /* Social Icons */
  .social-icon {
    display: inline-block;
    width: 20px;
    height: 20px;
    margin: 0 0.5rem;
    opacity: 0.7;
    transition: opacity 0.2s ease;
  }
  
  .social-icon:hover {
    opacity: 1;
  }
  
  /* Image Styles */
  .portrait {
    border-radius: 12px;
    border: 2px solid var(--stroke);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    transition: all 0.2s ease;
  }
  
  .portrait:hover {
    border-color: var(--accent);
    transform: scale(1.02);
  }
  
  /* Section Headings */
  .section-heading {
    margin-bottom: 3rem;
  }
  
  .eyebrow {
    color: var(--accent);
    font-family: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
  }
  
  /* Timeline */
  .timeline {
    position: relative;
    padding-left: 2rem;
  }
  
  .timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--stroke);
  }
  
  .timeline-item {
    position: relative;
    margin-bottom: 2rem;
  }
  
  .timeline-item::before {
    content: '';
    position: absolute;
    left: calc(-2rem + 1px - 6px);
    top: 0.5rem;
    width: 12px;
    height: 12px;
    background: var(--accent);
    border-radius: 50%;
    border: 2px solid var(--bg);
  }