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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.6;
            color: #e0e0e0;
            background-color: #0f0f0f;
        }

        .article-hero {
            background: linear-gradient(135deg, #1a1a1a 0%, #252525 100%);
            position: relative;
            overflow: hidden;
            padding: 5rem 2rem;
            border-bottom: 1px solid #2a2a2a;
        }

        .article-hero-content {
            max-width: 1000px;
            margin: 0 auto;
            text-align: center;
        }

        .article-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            margin-bottom: 1.25rem;
            color: #ffffff;
            line-height: 1.2;
        }

        .article-hero p {
            font-size: 1.1rem;
            color: #b0b0b0;
            max-width: 760px;
            margin: 0 auto;
            line-height: 1.8;
        }

        .article-section {
            background: #0f0f0f;
            padding: 4rem 2rem;
        }

        .article-container {
            max-width: 900px;
            margin: 0 auto;
        }

        .article-card {
            background: #1a1a1a;
            border-radius: 12px;
            padding: 2.5rem;
            border: 1px solid #2a2a2a;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
        }

        .article-card p {
            font-size: 1.05rem;
            color: #b0b0b0;
            line-height: 1.9;
            margin-bottom: 1.25rem;
        }

        .article-card h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: #ffffff;
            margin: 2.5rem 0 1rem;
            line-height: 1.3;
        }

        .article-card ul {
            margin: 1rem 0 1.5rem 1.5rem;
        }

        .article-card li {
            color: #b0b0b0;
            font-size: 1rem;
            line-height: 1.8;
            margin-bottom: 0.5rem;
        }

        .article-image {
            margin: 2rem 0 2rem;
            border-radius: 10px;
            overflow: hidden;
            border: 1px solid #2a2a2a;
        }

        .article-image img {
            display: block;
            width: 100%;
            height: auto;
        }

        .info-box {
            background: #252525;
            border-left: 4px solid #06b6d4;
            border-radius: 8px;
            padding: 1.5rem;
            margin: 1.75rem 0;
        }

        .info-box p:last-child {
            margin-bottom: 0;
        }

        .table-wrap {
            overflow-x: auto;
            margin: 2rem 0;
            border-radius: 10px;
            border: 1px solid #2a2a2a;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            background: #1f1f1f;
        }

        th,
        td {
            padding: 14px 16px;
            text-align: left;
            vertical-align: top;
            border-bottom: 1px solid #2f2f2f;
            font-size: 0.95rem;
            line-height: 1.7;
        }

        th {
            background: #252525;
            color: #ffffff;
            font-weight: 700;
        }

        td {
            color: #b0b0b0;
        }

        tr:last-child td {
            border-bottom: none;
        }

        .highlight-box {
            background: #252525;
            padding: 1.5rem;
            border-radius: 8px;
            border-left: 4px solid #8b5cf6;
            margin-top: 1.5rem;
        }

        .highlight-box p:last-child {
            margin-bottom: 0;
        }

        .takeaways {
            margin-top: 2rem;
            padding: 2rem;
            background: #252525;
            border-radius: 10px;
            border-top: 4px solid #10b981;
        }

        .takeaways h2 {
            margin-top: 0;
        }

        .calculator-footer {
            background: transparent;
            color: #333;
            padding: 40px 20px 20px;
            font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
        }

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

        .footer-title {
            text-align: center;
            font-size: 28px;
            font-weight: bold;
            margin-bottom: 30px;
            color: white;
        }

        .calculator-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }

        .calculator-section {
            background: #1a1f2b;
            border-radius: 15px;
            padding: 20px;
            border: 1px solid rgba(255,255,255,0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .calculator-section:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
        }

        .section-title {
            font-size: 18px;
            font-weight: bold;
            margin-bottom: 15px;
            color: #ffffff;
            border-bottom: 2px solid rgba(255,255,255,0.08);
            padding-bottom: 8px;
        }

        .calculator-links {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 8px;
        }

        .calculator-link {
            color: #e5e7eb;
            text-decoration: none;
            padding: 6px 10px;
            border-radius: 6px;
            font-size: 13px;
            transition: all 0.3s ease;
            background: rgba(255,255,255,0.03);
            border: 1px solid rgba(255,255,255,0.08);
        }

        .calculator-link:hover {
            background: rgba(255,255,255,0.08);
            color: #ffffff;
            border-color: rgba(255,255,255,0.14);
            transform: scale(1.02);
        }

        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 14px;
            color: #9ca3af;
        }

        @media (max-width: 768px) {
            .article-hero {
                padding: 3rem 1.25rem;
            }

            .article-hero h1 {
                font-size: 2rem;
            }

            .article-hero p {
                font-size: 1rem;
            }

            .article-section {
                padding: 2.5rem 1rem;
            }

            .article-card {
                padding: 1.5rem;
            }

            .article-card h2 {
                font-size: 1.4rem;
            }

            .article-card p,
            .article-card li,
            th,
            td {
                font-size: 0.95rem;
            }

            .calculator-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .calculator-links {
                grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
            }

            .footer-title {
                font-size: 24px;
            }
        }

        @media (max-width: 520px) {
            .article-hero h1 {
                font-size: 1.7rem;
            }

            .calculator-links {
                grid-template-columns: 1fr;
            }
        }