:root {
        --primary-color: #003366; /* Deep Blue */
        --secondary-color: #cc0000; /* Red */
        --accent-color: #f4f4f4; /* Light Grey */
        --text-color: #333;
        --heading-color: #111;
        --bg-color: #fff;
        --nav-bg: #002244;
        --container-width: 1100px;
        --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }

    * {
        box-sizing: border-box;
    }

    body {
        font-family: var(--font-main);
        line-height: 1.6;
        color: var(--text-color);
        margin: 0;
        padding: 0;
        background-color: var(--bg-color);
        -webkit-font-smoothing: antialiased;
    }

    .container {
        width: 90%;
        max-width: var(--container-width);
        margin: 0 auto;
        padding: 0 20px;
    }

    /* Header & Navigation */
    header {
        background: var(--primary-color);
        color: #fff;
        padding: 1rem 0;
        box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        position: sticky;
        top: 0;
        z-index: 1000;
    }

    header .container {
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
    }

    header h1.logo {
        margin: 0;
        font-size: 1.5rem;
        font-weight: 700;
        letter-spacing: -0.5px;
    }

    header h1.logo a {
        color: #fff;
        text-decoration: none;
        transition: opacity 0.2s;
    }

    header h1.logo a:hover {
        opacity: 0.9;
        text-decoration: none;
    }

    nav ul {
        list-style: none;
        padding: 0;
        margin: 0;
        display: flex;
    }

    nav ul li {
        margin-left: 20px;
    }

    nav ul li a {
        color: rgba(255,255,255,0.85);
        text-decoration: none;
        font-weight: 500;
        font-size: 1rem;
        padding: 5px 0;
        transition: color 0.2s;
        position: relative;
    }

    nav ul li a:hover {
        color: #fff;
        text-decoration: none;
    }

    nav ul li a::after {
        content: '';
        position: absolute;
        width: 0;
        height: 2px;
        bottom: 0;
        left: 0;
        background-color: var(--secondary-color);
        transition: width 0.3s;
    }

    nav ul li a:hover::after {
        width: 100%;
    }

    /* Main Content */
    main {
        padding: 40px 0;
        min-height: 60vh;
    }

    article {
        max-width: 800px;
        margin: 0 auto;
    }

    h1, h2, h3 {
        color: var(--heading-color);
        margin-top: 1.5em;
        margin-bottom: 0.5em;
        line-height: 1.2;
    }

    h1 {
        font-size: 2.5rem;
        margin-top: 0;
        border-bottom: 3px solid var(--secondary-color);
        padding-bottom: 10px;
        display: inline-block;
    }

    h2 {
        font-size: 1.8rem;
        border-bottom: 1px solid #eee;
        padding-bottom: 5px;
    }

    h3 {
        font-size: 1.4rem;
        color: var(--primary-color);
    }

    p {
        margin-bottom: 1.2em;
        font-size: 1.1rem;
    }

    ul {
        margin-bottom: 1.5em;
        padding-left: 20px;
    }

    li {
        margin-bottom: 0.5em;
    }

    a {
        color: var(--primary-color);
        text-decoration: none;
        font-weight: 500;
        border-bottom: 1px solid transparent;
        transition: border-color 0.2s;
    }

    a:hover {
        border-bottom-color: var(--primary-color);
    }

    /* Contact Info Box */
    .contact-info {
        background: var(--accent-color);
        padding: 20px;
        border-left: 5px solid var(--primary-color);
        margin: 20px 0;
        border-radius: 4px;
    }

    /* Footer */
    footer {
        background: #f8f9fa;
        padding: 40px 0;
        border-top: 1px solid #e9ecef;
        text-align: center;
        color: #6c757d;
    }

    footer p {
        font-size: 0.9rem;
        margin-bottom: 10px;
    }

    footer nav ul {
        justify-content: center;
        margin-bottom: 20px;
    }

    footer nav ul li a {
        color: #6c757d;
        font-size: 0.9rem;
    }

    footer nav ul li a:hover {
        color: var(--primary-color);
    }

    /* AdSense CLS Armor - Critical Requirement */
    .ad-container-leaderboard {
      min-height: 90px;
      display: flex;
      justify-content: center;
      align-items: center;
      margin: 40px 0;
      background-color: #f1f3f5;
      border: 1px dashed #ced4da;
      color: #adb5bd;
      font-size: 0.8rem;
      border-radius: 4px;
    }
    @media (max-width: 768px) {
      .ad-container-leaderboard {
        min-height: 250px;
      }
      header .container {
          flex-direction: column;
          align-items: flex-start;
      }
      nav ul {
          margin-top: 15px;
      }
      nav ul li {
          margin-left: 0;
          margin-right: 15px;
      }
      h1 {
          font-size: 2rem;
      }
    }