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

        body {
            background: #f4f7fb;
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            line-height: 1.45;
            color: #1f2f3e;
            padding: 2rem 1.5rem;
        }

        .spec-container {
            max-width: 1280px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        /* card style – minimal, clean */
        .card {
            background: #ffffff;
            border-radius: 20px;
            box-shadow: 0 6px 16px -8px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
            overflow: hidden;
        }

        .card-header {
            padding: 1.2rem 2rem 0.6rem 2rem;
            border-bottom: 1px solid #eef2f6;
            display: flex;
            align-items: baseline;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .card-header h2 {
            font-size: 1.25rem;
            font-weight: 600;
            letter-spacing: -0.2px;
            color: #142b38;
        }

        .card-header .badge {
            font-size: 0.7rem;
            font-weight: 500;
            background: #eef2f6;
            color: #2c5a78;
            padding: 0.2rem 0.6rem;
            border-radius: 30px;
            letter-spacing: normal;
        }

        .subnote {
            font-size: 0.75rem;
            color: #7e8e9e;
            background: transparent;
            padding: 0;
        }

        /* main table */
        .spec-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.9rem;
        }

        .spec-table tr {
            border-bottom: 1px solid #eff3f8;
        }

        .spec-table tr:last-child {
            border-bottom: none;
        }

        .spec-table th,
        .spec-table td {
            padding: 1rem 2rem;
            vertical-align: top;
            background-color: #ffffff;
        }

        .spec-table th {
            width: 32%;
            font-weight: 600;
            color: #2a4858;
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 0.3px;
        }

        .spec-table td {
            color: #254e6b;
            font-weight: 450;
        }

        .multi-line {
            display: flex;
            flex-direction: column;
            gap: 0.4rem;
        }

        .chip-group {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 0.2rem;
        }

        .chip {
            background: #f0f4fa;
            padding: 0.2rem 0.7rem;
            border-radius: 30px;
            font-size: 0.75rem;
            color: #1f4b68;
            font-weight: 500;
        }

        /* two column sub-cards for chainrings */
        .row-duo {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
        }

        .sub-card {
            background: #ffffff;
            border-radius: 20px;
            border: 1px solid #edf2f8;
            overflow: hidden;
        }

        .sub-card-header {
            background: #ffffff;
            padding: 1rem 1.5rem;
            border-bottom: 1px solid #eff3f8;
        }

        .sub-card-header h3 {
            font-size: 1rem;
            font-weight: 600;
            color: #1f597b;
            letter-spacing: -0.2px;
        }

        .compact-table {
            width: 100%;
            border-collapse: collapse;
        }

        .compact-table tr {
            border-bottom: 1px solid #f0f4fa;
        }

        .compact-table td {
            padding: 0.8rem 1.5rem;
            font-size: 0.85rem;
            vertical-align: top;
        }

        .compact-table td:first-child {
            width: 38%;
            font-weight: 600;
            color: #2f5a78;
            background-color: #fefefe;
        }

        .compact-table td:last-child {
            color: #264f6e;
        }

        /* feature list – no icons */
        .feature-list {
            padding: 1.4rem 2rem 1.8rem 2rem;
        }

        .feature-item {
            margin-bottom: 0.85rem;
        }

        .feature-text {
            color: #2c4a66;
            line-height: 1.5;
            font-size: 0.9rem;
        }

        .packing-row {
            background: #fbfdfe;
            padding: 1rem 2rem;
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            align-items: baseline;
            border-top: 1px solid #eef2f8;
        }

        .packing-item strong {
            font-weight: 600;
            color: #1b4c6e;
            margin-right: 0.5rem;
        }

        hr {
            margin: 0;
            border: none;
            border-top: 1px solid #eef2f8;
        }

        .plain-note {
            padding: 0.6rem 2rem 1.5rem 2rem;
            font-size: 0.75rem;
            color: #6a859e;
            border-top: 1px solid #eff3f8;
            margin-top: 0;
        }

        @media (max-width: 780px) {
            body {
                padding: 1rem;
            }
            .spec-table th,
            .spec-table td {
                padding: 0.75rem 1rem;
                display: block;
                width: 100%;
            }
            .spec-table th {
                padding-bottom: 0.2rem;
            }
            .spec-table td {
                padding-top: 0.2rem;
                padding-bottom: 0.9rem;
            }
            .spec-table tr {
                display: block;
                margin-bottom: 0.5rem;
                border-bottom: 1px solid #eef2f8;
            }
            .row-duo {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
            .card-header {
                flex-direction: column;
                align-items: flex-start;
            }
            .feature-list {
                padding: 1.2rem;
            }
            .packing-row {
                padding: 1rem;
                gap: 1rem;
            }
        }

        @media (min-width: 780px) and (max-width: 1024px) {
            .spec-table th {
                width: 40%;
            }
        }