/* --- H-Lift Industrial Theme Variables --- */
    :root {
        --primary-color: #003366; /* Deep Navy Blue */
        --accent-color: #f39c12;  /* Safety Orange */
        --bg-light: #f4f7f6;
        --border-color: #e0e0e0;
        --text-dark: #333333;
        --text-light: #555555;
    }

    body {
        font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        color: var(--text-dark);
        line-height: 1.6;
        margin: 0;
        padding: 20px;
        background-color: #ffffff;
        font-size: 16px; /* Standardized 16px font */
    }

    .container {
        max-width: 1200px;
        margin: 0 auto;
    }

    /* --- Page Header --- */
    .page-header {
        border-bottom: 4px solid var(--primary-color);
        padding-bottom: 20px;
        margin-bottom: 40px;
        text-align: center;
    }

    .page-header h1 {
        color: var(--primary-color);
        font-size: 32px;
        margin: 0 0 10px 0;
        font-family: 'Cambria', serif;
    }

    .intro-box {
        background-color: var(--bg-light);
        padding: 25px;
        border-radius: 4px;
        border-left: 5px solid var(--accent-color);
        margin-bottom: 40px;
        font-size: 16px;
    }

    /* --- Selection Criteria Grid --- */
    .section-title {
        color: var(--primary-color);
        font-size: 24px;
        border-bottom: 2px solid #eee;
        padding-bottom: 10px;
        margin-bottom: 30px;
        font-family: 'Cambria', serif;
    }

    .criteria-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 25px;
        margin-bottom: 50px;
    }

    @media (min-width: 768px) {
        .criteria-grid {
            grid-template-columns: 1fr 1fr; /* 2 Columns */
        }
    }

    .criteria-card {
        border: 1px solid var(--border-color);
        border-radius: 6px;
        padding: 20px;
        background: #fff;
        box-shadow: 0 2px 5px rgba(0,0,0,0.05);
        transition: transform 0.2s;
    }

    .criteria-card:hover {
        transform: translateY(-3px);
        box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        border-top: 3px solid var(--accent-color);
    }

    .card-title {
        font-weight: bold;
        font-size: 18px;
        color: var(--primary-color);
        margin-bottom: 10px;
        display: block;
        border-bottom: 1px solid #eee;
        padding-bottom: 8px;
    }

    .card-title span {
        background: var(--primary-color);
        color: #fff;
        border-radius: 50%;
        width: 24px;
        height: 24px;
        display: inline-block;
        text-align: center;
        line-height: 24px;
        font-size: 14px;
        margin-right: 8px;
    }

    /* --- Technical Deep Dive Section --- */
    .deep-dive-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 30px;
        margin-top: 40px;
        background-color: #fafafa;
        padding: 30px;
        border-radius: 8px;
        border: 1px solid var(--border-color);
    }

    @media (min-width: 992px) {
        .deep-dive-grid {
            grid-template-columns: 1fr 1fr 1fr;
        }
    }

    .deep-dive-item {
        text-align: center;
    }

    .deep-dive-item img {
        max-width: 100%;
        height: auto;
        border: 1px solid #ddd;
        border-radius: 4px;
        margin-bottom: 15px;
        background: #fff;
    }

    .deep-dive-title {
        font-weight: bold;
        color: var(--primary-color);
        margin-bottom: 10px;
        display: block;
    }

    /* --- Checklist --- */
    .checklist-box {
        background-color: var(--primary-color);
        color: #fff;
        padding: 30px;
        border-radius: 8px;
        margin-top: 40px;
    }

    .checklist-box h3 {
        color: var(--accent-color);
        margin-top: 0;
        border-bottom: 1px solid rgba(255,255,255,0.2);
        padding-bottom: 10px;
        margin-bottom: 20px;
    }

    .checklist-box ul {
        list-style: none;
        padding: 0;
        columns: 2;
    }

    .checklist-box li {
        margin-bottom: 10px;
        padding-left: 25px;
        position: relative;
    }

    .checklist-box li::before {
        content: "✓";
        color: var(--accent-color);
        position: absolute;
        left: 0;
        font-weight: bold;
    }