:root {
      --accent: #1f4fd8;
      --text: #222;
      --muted: #666;
      --bg: #fafafa;
      --border: #e5e5e5;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
                   Roboto, Helvetica, Arial, sans-serif;
      line-height: 1.6;
      color: var(--text);
      background: var(--bg);
    }

    /* Hero */

    .hero {
      background: linear-gradient(120deg, #1f4fd8, #3b6df0);
      color: white;
      padding: 5rem 1.5rem 4rem;
    }
    
    .hero-content {
      max-width: 900px;
      margin: 0 auto;
      position: relative; 
    }

    .hero-image {
      position: absolute;
      right: 0;
      bottom: 0;
      max-width: 250px;
      height: auto;
      opacity: 1;    
    }

    .hero h1 {
      font-size: 2.8rem;
      margin: 0 0 0.5rem 0;
      position: relative; /* Ensure it stays above the image */
      z-index: 2;        
      text-shadow: 0 2px 4px rgba(0,0,0,0.3); /* Adds a subtle shadow for legibility */
    }

    .hero-subtitle {
      font-size: 1.2rem;
      opacity: 0.9;
      max-width: 500px; /* Narrower width prevents text from running into the image */
      position: relative;
      z-index: 2;
    }

    .hero-meta {
      margin-top: 1.5rem;
      display: flex;
      gap: 1.5rem;
      flex-wrap: wrap;
      font-weight: 500;
    }

    .hero-button {
      display: inline-block;
      margin-top: 2rem;
      background: white;
      color: #1f4fd8;
      padding: 0.7rem 1.4rem;
      border-radius: 6px;
      text-decoration: none;
      font-weight: 600;
    }

    .hero-button:hover {
      opacity: 0.9;
    }

    /* Main layout */

    .container {
      max-width: 900px;
      margin: 0 auto;
      padding: 3rem 1.5rem 4rem;
    }

    section {
      margin-top: 3rem;
      padding-top: 2rem;
      border-top: 1px solid var(--border);
    }
    
    .first {
      margin-top: 0rem;
      padding-top: 0rem;
      border-top: 0px solid var(--border);
    }

    h2 {
      font-size: 1.5rem;
      margin-bottom: 0.75rem;
      color: var(--accent);
    }

    p {
      margin-top: 0;
      max-width: 700px;
    }

    /* Cards */

    .cards {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 1.5rem;
      margin-top: 1.5rem;
      max-width: 700px;
    }

    .card {
      background: white;
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 1.2rem;
    }

    .card h3 {
      margin: 0 0 0.5rem 0;
      color: var(--accent);
      font-size: 1.1rem;
    }

    /* Registration */

    .registration {
      display: inline-block;
      margin-top: 0.8rem;
      padding: 0.6rem 1.2rem;
      background: var(--accent);
      color: white;
      text-decoration: none;
      border-radius: 4px;
      font-weight: 500;
    }

    .registration:hover {
      opacity: 0.9;
    }

    /* Organizers */

    ul.organizers {
      list-style: none;
      padding-left: 0;
      max-width: 700px;
    }

    ul.organizers li {
      padding: 0.4rem 0;
    }

    footer {
      margin-top: 4rem;
      font-size: 0.9rem;
      color: var(--muted);
    }

    /* --- Desktop: Prevent text/image overlap --- */
    @media (min-width: 900px) {
      .hero-content {
        /* Creates a 320px wide 'buffer' on the right so text doesn't hit the image */
        padding-right: 320px; 
      }
    }

    /* --- Tablet: Shrink the image as the screen narrows --- */
    @media (max-width: 768px) {
      .hero-image {
        max-width: 180px;
        opacity: 0.5; /* More transparency helps text readability if they do touch */
      }
      
      .hero h1 {
        font-size: 2.2rem; /* Slightly smaller font for better fit */
      }
    }

    /* --- Mobile: Hide image and adjust typography --- */
    @media (max-width: 600px) {
      .hero-image {
        display: none; /* Hide image to prioritize text on small phones */
      }

      .hero h1 {
        font-size: 2rem;
      }

      .hero-meta {
        flex-direction: column; /* Stack date and location vertically */
        gap: 0.5rem;
      }
    }