:root {
      /* Default Dark Theme */
      --bg-primary: #0a192f;
      --bg-secondary: #112240;
      --bg-tertiary: #233554;
      --text-title: #ffffff;
      --text-primary: #ccd6f6;
      --text-secondary: #8892b0;
      --accent: #64ffda;
      --accent-dim: rgba(100, 255, 218, 0.1);
      --header-bg: rgba(10, 25, 47, 0.9);
      --shadow: rgba(2, 12, 27, 0.7);
    }

    [data-theme="light"] {
      /* Light Theme Overrides */
      --bg-primary: #ffffff;
      --bg-secondary: #f3f4f6;
      --bg-tertiary: #e5e7eb;
      --text-title: #111827;
      --text-primary: #374151;
      --text-secondary: #4b5563;
      --accent: #0d9488;
      /* Darker Teal for contrast on white */
      --accent-dim: rgba(13, 148, 136, 0.1);
      --header-bg: rgba(255, 255, 255, 0.9);
      --shadow: rgba(0, 0, 0, 0.1);
    }

    body {
      font-family: 'Inter', sans-serif;
      background-color: var(--bg-primary);
      color: var(--text-primary);
      transition: background-color 0.3s, color 0.3s;
    }

    .section-title {
      color: var(--accent);
    }

    .nav-link {
      transition: color 0.3s;
      position: relative;
      color: var(--text-primary);
    }

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

    .nav-link::after {
      content: '';
      position: absolute;
      width: 100%;
      height: 2px;
      bottom: -5px;
      left: 0;
      background-color: var(--accent);
      transform: scaleX(0);
      transition: transform 0.3s ease-in-out;
      transform-origin: bottom right;
    }

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

    .card {
      background-color: var(--bg-secondary);
      transition: transform 0.3s, box-shadow 0.3s, background-color 0.3s;
    }

    .card:hover {
      transform: translateY(-10px);
      box-shadow: 0 20px 30px -15px var(--shadow);
    }

    .skill-tag {
      background-color: var(--bg-secondary);
      border: 1px solid var(--accent);
      color: var(--accent);
      transition: all 0.3s;
    }

    .skill-tag:hover {
      background-color: var(--accent-dim);
    }

    .recipe-tag.active {
      background-color: var(--accent) !important;
      color: var(--bg-primary) !important;
      font-weight: bold;
    }

    .timeline-item:nth-child(odd) .timeline-content::after {
      content: '';
      position: absolute;
      top: 20px;
      right: -15px;
      border-width: 8px;
      border-style: solid;
      border-color: transparent transparent transparent var(--bg-secondary);
    }

    .timeline-item:nth-child(even) .timeline-content::after {
      content: '';
      position: absolute;
      top: 20px;
      left: -15px;
      border-width: 8px;
      border-style: solid;
      border-color: transparent var(--bg-secondary) transparent transparent;
    }

    /* Milestone Timeline Styles */
    .milestone-dot {
      transition: all 0.3s ease;
      box-shadow: 0 0 0 0 var(--accent);
      background-color: var(--bg-primary);
      border-color: var(--accent);
    }

    /* Desktop Hover Interaction */
    @media (hover: hover) {
      /* Removed expansion on hover */

      .milestone-item:hover h3 {
        color: var(--accent);
      }

      .milestone-item:hover .milestone-dot {
        background-color: var(--accent);
        box-shadow: 0 0 0 6px var(--accent-dim);
      }

      /* Keep "Hover to see details" text visible on hover since it doesn't auto-expand */
      /* .milestone-item:hover .text-sm.italic {
        display: none;
      } */
    }

    /* Mobile Active State */
    .milestone-item.active-mobile .milestone-details {
      max-height: 0;
      opacity: 0;
      overflow: hidden;
      transition: max-height 0.5s ease-in-out, opacity 0.5s ease-in-out, margin-top 0.3s ease;
      text-align: justify;
    }

    .milestone-item.active-mobile h3 {
      color: var(--accent);
    }

    .milestone-item.active-mobile .milestone-dot {
      background-color: var(--accent);
      box-shadow: 0 0 0 6px var(--accent-dim);
    }

    .milestone-item.active-mobile .text-sm.italic {
      display: none;
    }

    /* Scroll Animation */
    .reveal {
      position: relative;
      transform: translateY(100px);
      opacity: 0;
      transition: all 1s ease;
    }

    .reveal.active {
      transform: translateY(0px);
      opacity: 1;
    }

    .photo-block {
      background-color: var(--bg-secondary);
      transition: all 0.3s ease;
      cursor: pointer;
      overflow: hidden;
    }

    .photo-block:hover {
      background-color: var(--bg-tertiary);
      transform: translateY(-5px);
    }

    #particles-js {
      position: fixed;
      width: 100%;
      height: 100%;
      top: 0;
      left: 0;
      z-index: 0;
    }

    /* Toggle Switch */
    .theme-toggle {
      cursor: pointer;
      color: var(--accent);
      transition: transform 0.3s ease;
    }

    .theme-toggle:hover {
      transform: rotate(45deg);
    }