.r4-tube-specifications{min-width:0;max-width:100%;scroll-margin-top:90px}
.r4-tube-specifications [hidden]{display:none!important}
.tube-spec-disclosure>summary{min-height:44px;padding:10px 0;line-height:1.5;font-weight:600;cursor:pointer}
.tube-spec-disclosure>.r4-tube-specifications{margin-top:16px}
.r4-spec-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;margin-bottom:24px}
.r4-spec-heading h2{margin:0 0 10px;font-size:clamp(1.5rem,3vw,2rem)}
.r4-spec-heading p{max-width:64ch;margin:0;line-height:1.55}
.r4-spec-size-label{display:grid;gap:8px;min-width:150px;font-size:.9rem;font-weight:700}
.r4-spec-size-label select{min-height:44px;width:100%;border:1px solid currentColor;border-radius:8px;padding:8px 12px;background:#fff;color:inherit;font:inherit}
.r4-spec-layout{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:28px;align-items:start}
.r4-spec-visual,.r4-spec-data{min-width:0}
.r4-spec-view-controls{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.r4-spec-view-controls button{min-height:44px;padding:9px 14px;border:1px solid currentColor;border-radius:8px;background:transparent;color:inherit;font:inherit;cursor:pointer}
.r4-spec-view-controls button[aria-pressed=true]{background:var(--color-purple,#d6c4e8);font-weight:700}
.r4-tube-specifications figure{margin:0}
.r4-tube-specifications figure>a{display:block;border-radius:12px;overflow:hidden;background:#fff}
.r4-tube-specifications figure img{display:block;width:100%;height:auto;aspect-ratio:7/8;object-fit:contain}
.r4-tube-specifications figcaption{margin-top:8px;font-size:.85rem;line-height:1.45}
.r4-spec-actions{display:flex;align-items:center;flex-wrap:wrap;gap:10px 16px;margin-top:16px;font-size:.9rem}
.r4-spec-actions a{min-height:44px;display:inline-flex;align-items:center;overflow-wrap:anywhere}
.r4-spec-actions button{white-space:normal}
.r4-tube-specifications table{border-collapse:collapse;width:100%;font-size:.94rem}
.r4-tube-specifications th,.r4-tube-specifications td{padding:11px 8px;border-bottom:1px solid #ddd;text-align:left;vertical-align:top;overflow-wrap:anywhere}
.r4-spec-details th{width:60%;font-weight:600}
.r4-spec-details td{font-variant-numeric:tabular-nums}
.r4-spec-data>.small{line-height:1.5;margin:14px 0 0}
.r4-spec-comparison{margin-top:24px;border-top:1px solid #ddd;padding-top:16px}
.r4-spec-comparison>summary{min-height:44px;cursor:pointer;font-weight:700;padding:10px 0}
.r4-spec-comparison-image{display:block;max-width:800px;width:100%;height:auto;margin:14px auto}
.r4-spec-comparison-scroll{max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch}
.r4-spec-comparison-scroll table{min-width:600px}
.r4-spec-comparison-scroll th:first-child{min-width:210px}
.r4-tube-spec-summary{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 12px;max-width:100%;font-size:.83rem;line-height:1.5;overflow-wrap:anywhere;margin:8px 0}
.r4-tube-spec-summary strong{display:block;font-size:inherit;font-weight:600}
.r4-tube-spec-summary>a{display:inline-block;min-height:32px;padding:4px 0;text-decoration:underline}
.r4-tube-specifications :focus-visible,.r4-tube-spec-summary>a:focus-visible,.tube-spec-disclosure>summary:focus-visible{outline:2px solid currentColor;outline-offset:3px}
@media(max-width:800px){.r4-spec-heading{flex-direction:column;gap:16px;margin-bottom:18px}.r4-spec-size-label{width:100%;max-width:280px}.r4-spec-layout{grid-template-columns:minmax(0,1fr);gap:20px}.r4-tube-specifications{padding:20px}.r4-spec-details th{width:57%}}
@media(max-width:380px){.r4-tube-specifications{padding:16px}.r4-spec-view-controls{display:grid;grid-template-columns:1fr 1fr}.r4-spec-view-controls button{padding:8px;font-size:.85rem}.r4-tube-specifications th,.r4-tube-specifications td{padding:10px 6px;font-size:.86rem}.r4-spec-actions{gap:6px 12px}}