* { box-sizing: border-box; }

    body {
        background: #f0f2f5;
        font-family: 'Segoe UI', 'Roboto', 'Arial', sans-serif;
        padding: 20px;
    }

    .container-main {
        /* 22.07.2026: keep About blocks aligned with the site-wide 1440 px width. */
        width: 100%;
        max-width: 1440px;
        margin: 0 auto;
        padding: 20px;
        background: #fff;
        border-radius: 16px;
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    }

    .about-container {
        width: 100%;
        max-width: 1440px;
        margin: 0 auto;
        padding: 30px;
        background: #fff;
        border-radius: 16px;
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    }

    .about-intro {
        /* 22.07.2026: use the full width of the About container. */
        width: 100%;
        max-width: none;
        color: #4a5568;
        font-size: 17px;
        line-height: 1.7;
    }

    .summary-grid {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 16px;
        margin: 26px 0;
    }

    .summary-card {
        padding: 20px;
        border: 1px solid #bee3f8;
        border-radius: 12px;
        background: #ebf8ff;
    }

    .summary-value {
        display: block;
        color: #1a365d;
        font-size: 30px;
        font-weight: 700;
    }

    .summary-label { color: #4a5568; }

    .charts-grid {
        display: grid;
        gap: 20px;
        margin-top: 28px;
    }

    .chart-card {
        min-width: 0;
        padding: 20px;
        border: 1px solid #e2e8f0;
        border-radius: 12px;
        background: #fff;
    }

    .chart-card h2 {
        margin: 0 0 5px;
        color: #2d3748;
        font-size: 21px;
    }

    .chart-description {
        min-height: 42px;
        margin-bottom: 16px;
        color: #718096;
        font-size: 14px;
    }

    .chart-wrapper {
        position: relative;
        height: 470px;
    }

    .empty-chart {
        display: flex;
        height: 100%;
        align-items: center;
        justify-content: center;
        color: #718096;
        background: #f8fafc;
        border-radius: 8px;
    }

    @media (max-width: 900px) {
        .summary-grid { grid-template-columns: 1fr; }
        .chart-description { min-height: 0; }
    }