:root {
        --amazon-orange: #ff9900;
        --amazon-dark-blue: #232f3e;
        --amazon-light-blue: #37475a;
        --amazon-teal: #00a8e1;
        --amazon-gray: #eaeded;
        --amazon-dark-gray: #444;
        --amazon-light-gray: #f5f5f5;
        --white: #ffffff;
        --shadow-light: 0 5px 15px rgba(0, 0, 0, 0.05);
        --shadow-medium: 0 8px 30px rgba(0, 0, 0, 0.12);
        --shadow-dark: 0 10px 40px rgba(0, 0, 0, 0.2);
        --border-radius: 8px;
        --transition-speed: 0.3s ease;
      }

      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }

      body {
        font-family: "Poppins", sans-serif;
        line-height: 1.6;
        color: var(--amazon-dark-gray);
        background-color: var(--white);
      }

      .container {
        margin: 0 auto;
        padding: 0 20px;
      }

      /* Algorithm Case Study Section */
      .algorithm-case-study {
        padding: 80px 0;
        background: linear-gradient(120deg, #f8f9fa, #f0f2f5);
      }

      .case-study-header {
        text-align: center;
        margin-bottom: 60px;
      }

      .case-study-subtitle {
        color: var(--amazon-orange);
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 1.5px;
        margin-bottom: 10px;
        font-size: 0.9rem;
      }

      .case-study-title {
        color: var(--amazon-dark-blue);
        font-size: 2.5rem;
        margin-bottom: 20px;
        position: relative;
        display: inline-block;
      }

      .case-study-title::after {
        content: "";
        position: absolute;
        bottom: -10px;
        left: 50%;
        transform: translateX(-50%);
        width: 80px;
        height: 3px;
        background: var(--amazon-orange);
        border-radius: 3px;
      }

      .case-study-intro {
        max-width: 700px;
        margin: 0 auto;
        font-size: 1.1rem;
        color: var(--amazon-light-blue);
      }

      .algorithm-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;
        margin-top: 50px;
      }

      .algorithm-explanation {
        background: var(--white);
        border-radius: var(--border-radius);
        padding: 40px;
        box-shadow: var(--shadow-medium);
        position: relative;
        overflow: hidden;
      }

      .algorithm-explanation h3 {
        color: var(--amazon-dark-blue);
        margin-bottom: 20px;
        font-size: 1.5rem;
      }

      .algorithm-explanation p {
        margin-bottom: 15px;
        font-size: 1rem;
      }

    

      .amazon-applications {
        background: var(--amazon-dark-blue);
        color: var(--white);
        border-radius: var(--border-radius);
        padding: 40px;
        box-shadow: var(--shadow-medium);
        display: flex;
        flex-direction: column;
      }

      .amazon-applications h3 {
        color: var(--amazon-orange);
        margin-bottom: 20px;
        font-size: 1.5rem;
      }

      .application-card {
        background: rgba(255, 255, 255, 0.1);
        border-radius: var(--border-radius);
        padding: 20px;
        margin-bottom: 20px;
        transition: all var(--transition-speed);
        border-left: 3px solid var(--amazon-orange);
      }

      .application-card:hover {
        transform: translateY(-5px);
        background: rgba(255, 255, 255, 0.15);
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
      }

      .application-card h4 {
        color: var(--amazon-orange);
        margin-bottom: 10px;
        display: flex;
        align-items: center;
      }

      .application-card h4 i {
        margin-right: 10px;
      }

      .application-card p {
        margin-bottom: 15px;
        font-size: 0.95rem;
        color: #e0e0e0;
      }

      .efficiency-metrics {
        margin-top: 30px;
        background: rgba(255, 153, 0, 0.1);
        padding: 20px;
        border-radius: var(--border-radius);
      }

      .efficiency-metrics h4 {
        color: var(--amazon-orange);
        margin-bottom: 15px;
        font-size: 1.2rem;
      }

      .metrics-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 15px;
      }

      .metric-card {
        background: var(--white);
        padding: 15px;
        border-radius: var(--border-radius);
        text-align: center;
        box-shadow: var(--shadow-light);
      }

      .metric-card h5 {
        color: var(--amazon-dark-blue);
        font-size: 1rem;
        margin-bottom: 5px;
      }

      .metric-value {
        color: var(--amazon-orange);
        font-size: 1.8rem;
        font-weight: 700;
        margin-bottom: 5px;
      }

      .metric-description {
        font-size: 0.8rem;
        color: var(--amazon-dark-gray);
      }

      .code-snippet {
        margin: 0;
        background: #2d2d2d;
        border-radius: var(--border-radius);
        padding: 20px;
        overflow-x: auto;
      }

      .code-snippet pre {
        font-family: "Consolas", monospace;
        color: #e0e0e0;
        font-size: 0.9rem;
      }

      .code-snippet code .comment {
        color: #6a9955;
      }

      .code-snippet code .keyword {
        color: #569cd6;
      }

      .code-snippet code .function {
        color: #dcdcaa;
      }

      .code-snippet code .string {
        color: #ce9178;
      }

      .relationship-diagram {
        position: relative;
        margin-top: 40px;
      }

      .relationship-diagram h4 {
        color: var(--white);
        margin-bottom: 15px;
        font-size: 1.2rem;
        text-align: center;
      }

      .diagram-container {
        background: rgba(255, 255, 255, 0.1);
        border-radius: var(--border-radius);
        padding: 20px;
        display: flex;
        justify-content: center;
        position: relative;
        min-height: 200px;
      }

      .entity {
        position: absolute;
        width: 100px;
        height: 100px;
        background: var(--white);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: 600;
        box-shadow: var(--shadow-medium);
        z-index: 2;
      }

      .entity-a {
        top: 20px;
        left: 20%;
        background: rgba(255, 153, 0, 0.2);
        border: 2px solid var(--amazon-orange);
        color: var(--amazon-dark-blue);
      }

      .entity-b {
        top: 20px;
        right: 20%;
        background: rgba(35, 47, 62, 0.2);
        border: 2px solid var(--amazon-dark-blue);
        color: var(--amazon-dark-blue);
      }

      .entity-arrows {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        z-index: 1;
      }

      @media (max-width: 768px) {
        .algorithm-grid {
          grid-template-columns: 1fr;
        }

        .metrics-grid {
          grid-template-columns: 1fr;
        }

        .case-study-title {
          font-size: 2rem;
        }

        .case-study-intro {
          font-size: 1rem;
        }
    }
    .algorithm-steps {
        margin-top: 30px;
        background: rgba(255, 153, 0, 0.05);
        border-radius: var(--border-radius);
        padding: 25px;
    }

    .algorithm-steps h4 {
        color: var(--amazon-dark-blue);
        margin-bottom: 18px;
        font-size: 1.25rem;
        position: relative;
        display: inline-block;
        padding-bottom: 8px;
    }

    .algorithm-steps h4:after {
        content: "";
        position: absolute;
        bottom: 0;
        left: 0;
        width: 40px;
        height: 2px;
        background: var(--amazon-orange);
    }

    .algorithm-steps ol {
        padding-left: 25px;
        margin-bottom: 20px;
        counter-reset: algorithm-counter;
    }

    .algorithm-steps ul {
        padding-left: 20px;
        margin-bottom: 20px;
        list-style-type: none;
    }

    .algorithm-steps ul li {
        position: relative;
        padding-left: 18px;
        margin-bottom: 12px;
    }

    .algorithm-steps ul li:before {
        content: "";
        position: absolute;
        left: 0;
        top: 10px;
        width: 8px;
        height: 8px;
        background-color: var(--amazon-orange);
        border-radius: 50%;
    }

    .algorithm-steps li {
        margin-bottom: 12px;
        position: relative;
        padding-left: 5px;
        transition: transform var(--transition-speed);
    }

    .algorithm-steps li:hover {
        transform: translateX(3px);
    }


         .algorithm-comparison {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin: 30px 0;
        }

        .algorithm-card {
            background: #f8f9fa;
            border-radius: var(--border-radius);
            padding: 20px;
            border-top: 3px solid var(--amazon-orange);
            box-shadow: var(--shadow-light);
        }

        .algorithm-card h4 {
            color: var(--amazon-dark-blue);
            margin-bottom: 10px;
            font-size: 1.2rem;
        }

        .algorithm-card ul {
            padding-left: 20px;
            margin-top: 10px;
        }

        .algorithm-card li {
            margin-bottom: 8px;
            font-size: 0.95rem;
        }