:root {
    --bg: #f4f6f8;
    --text: #1f2937;
    --card-bg: #ffffff;
    --header-bg: #1f2937;
    --footer-bg: #1f2937;
    --status-color: #6b7280;
    --tooltip-bg: #374151;
    --muted-text: #4b5563;
  }
  
  .dark-mode {
    --bg: #1a1c1f;
    --text: #f3f4f6;
    --card-bg: #2a2d31;
    --header-bg: #111827;
    --footer-bg: #111827;
    --status-color: #9ca3af;
    --tooltip-bg: #4b5563;
    --muted-text: #d1d5db;
  }
  
  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
  }
  
  header {
    background: var(--header-bg);
    color: white;
    padding: 30px 20px;
    text-align: center;
    position: relative;
  }
  
  header h1 {
    font-size: 2rem;
    font-weight: 700;
  }
  
  #toggle-theme {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 6px 12px;
    background-color: #e5e7eb;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: background 0.3s;
  }
  
  section {
    max-width: 800px;
    margin: 40px auto;
    padding: 30px;
    background: var(--card-bg);
    color: var(--text);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    border-radius: 10px;
    transition: background 0.3s, color 0.3s;
  }
  
  section h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--text);
  }
  
  footer {
    background: var(--footer-bg);
    color: white;
    padding: 15px 20px;
    text-align: center;
    font-size: 0.9rem;
    position: fixed;
    bottom: 0;
    width: 100%;
  }
  
  .certification {
    margin-bottom: 30px;
  }
  
  .certification p {
    font-weight: 600;
    margin-bottom: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .status {
    font-weight: 600;
    color: var(--status-color);
    font-size: 0.95rem;
  }
  
  .bar-wrapper {
    position: relative;
    width: 100%;
    height: 22px;
    background-color: #e5e7eb;
    border-radius: 6px;
    overflow: hidden;
    transition: background 0.3s ease;
  }
  
  .bar-wrapper:hover {
    background-color: #d1d5db;
  }
  
  .progress {
    height: 100%;
    transition: width 0.5s ease;
    position: relative;
    z-index: 1;
  }
  
  .complete {
    background-color: #10b981;
    width: 100%;
  }
  
  .in-progress {
    background-color: #f59e0b;
    width: 30%;
  }
  
  .future {
    background-color: #9ca3af;
    width: 5%;
  }
  
  .bar-wrapper .tooltip {
    visibility: hidden;
    opacity: 0;
    background-color: var(--tooltip-bg);
    color: #fff;
    text-align: center;
    padding: 6px 10px;
    border-radius: 6px;
    position: absolute;
    top: -38px;
    left: 50%;
    transform: translateX(-50%);
    white-space: nowrap;
    font-size: 0.85rem;
    transition: opacity 0.3s ease, top 0.3s ease;
    z-index: 2;
  }
  
  .bar-wrapper:hover .tooltip {
    visibility: visible;
    opacity: 1;
    top: -45px;
  }
  
  .project {
    margin-bottom: 20px;
    text-align: left;
  }
  
  .project h3 {
    font-size: 1.1rem;
    color: var(--text);
    margin-bottom: 6px;
  }
  
  .project p {
    font-size: 0.95rem;
    color: var(--muted-text);
    transition: color 0.3s ease;
  }
  
  .contact-info {
    font-size: 1rem;
    color: var(--muted-text);
    transition: color 0.3s ease;
  }