:root {
      --pad: 1.5rem;
      --bg: #f5f5f5;
      --text: #222;
      --accent: #b30000;
    }

    body {
      margin: 0;
      font-family: Arial, sans-serif;
      background: var(--bg);
      color: var(--text);
    }

    /* HEADER */
    header {
      background: var(--accent);
      color: #fff;
      padding: var(--pad);
    }

    .nav {
      display: flex;
      justify-content: space-between;
      align-items: center;
      position: relative;
    }

    .nav-links {
      list-style: none;
      display: flex;
      gap: 2rem;
      margin: 0;
      padding: 0;
    }

    .nav-links a {
      color: #fff;
      text-decoration: none;
      font-weight: bold;
    }

    /* HAMBURGER */
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 6px;
      background: none;
      border: none;
      cursor: pointer;
    }

    .bar {
      width: 28px;
      height: 3px;
      background: #fff;
    }

    /* LAYOUT */
    .container {
      padding: var(--pad);
    }

    .layout {
      display: block;
    }

    section {
      background: #fff;
      padding: var(--pad);
      margin-bottom: var(--pad);
      border-radius: 8px;
    }

    aside {
      background: #fff;
      padding: var(--pad);
      border-radius: 8px;
    }

    /* MEDIUM */
    @media (min-width: 768px) {
      .layout {
        display: grid;
        grid-template-columns: 2fr 1fr;
        gap: var(--pad);
      }
    }

    /* LARGE */
    @media (min-width: 1200px) {
      .layout {
        grid-template-columns: 3fr 1fr;
      }
    }

    /* MOBILE NAV */
    @media (max-width: 767px) {
      .hamburger {
        display: flex;
      }

      .nav-links {
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: rgba(0,0,0,0.8);
        flex-direction: column;
        padding: 1rem;
        text-align: center;
        display: none;
      }

      body.nav-open .nav-links {
        display: flex;
      }
    }

    footer {
      background: #333;
      color: #fff;
      padding: var(--pad);
      text-align: center;
      margin-top: 2rem;
    }
      /* Sticky Navigation */
    header {
      position: sticky;
      top: 0;
      z-index: 1000;
    }

    /* Hero Section */
    .hero {
      background: url('https://images.unsplash.com/photo-1513639725746-c5d3e861f32a') center/cover no-repeat;
      padding: 6rem 1.5rem;
      text-align: center;
      color: #fff;
    }
    .hero-content {
      text-shadow: 1px 1px 4px rgba(0,0,0,0.7);
    }