/* --- Basic Styles --- */
    :root {
        /* H-Lift Technical Theme */
        --primary-color: #003366; /* Navy Blue */
        --accent-color: #5dade2; /* Lighter Blue for highlights */
        --bg-light: #f4f6f9;
        --border-color: #d1d5db;
        --text-dark: #333;
        --text-light: #555;
        --note-bg: #fff3cd;
        --note-border: #ffeeba;
        --note-text: #856404;
    }

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

    .container {
        max-width: 1000px; /* Slightly narrower for document readability */
        margin: 0 auto;
    }

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

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

    .page-header .subtitle {
        font-size: 16px;
        color: var(--text-light);
        font-weight: 500;
    }

    /* --- Content Layout --- */
    .content-section {
        margin-bottom: 40px;
    }

    .section-title {
        font-size: 22px;
        color: var(--primary-color);
        border-bottom: 1px solid #eee;
        padding-bottom: 10px;
        margin-bottom: 20px;
        font-weight: 700;
    }

    /* --- Abstract Box --- */
    .abstract-box {
        background: var(--bg-light);
        padding: 25px;
        border-left: 5px solid var(--primary-color);
        border-radius: 4px;
        margin-bottom: 30px;
        font-size: 16px;
    }

    /* --- Scope List --- */
    .scope-list {
        list-style: none;
        padding: 0;
    }

    .scope-item {
        margin-bottom: 20px;
        padding-left: 20px;
    }

    .scope-number {
        font-weight: bold;
        color: var(--primary-color);
        margin-right: 10px;
    }

    /* --- Grade List --- */
    .grade-list {
        margin-left: 40px;
        margin-top: 10px;
        list-style: disc;
    }

    .grade-list li {
        margin-bottom: 5px;
    }

    /* --- Formula Box --- */
    .formula-box {
        background: #fff;
        border: 1px solid var(--border-color);
        padding: 15px;
        margin: 15px 0 15px 40px;
        font-family: 'Courier New', Courier, monospace;
        font-size: 14px;
        color: #444;
        border-radius: 4px;
    }

    /* --- Note Styling --- */
    .note-box {
        background-color: var(--note-bg);
        border: 1px solid var(--note-border);
        color: var(--note-text);
        padding: 10px 15px;
        border-radius: 4px;
        font-size: 14px;
        margin-top: 10px;
        display: inline-block;
    }

    .note-label {
        font-weight: bold;
        text-transform: uppercase;
        font-size: 12px;
        margin-right: 5px;
    }