.additional-intro-links { display: flex; flex-wrap: wrap; gap: 10px 24px; }
.additional-explorer { padding-bottom: 52px; scroll-margin-top: 25px; }
.additional-explorer .kit-explorer-heading { padding-bottom: 26px; }
.additional-explorer-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(290px, .8fr); gap: clamp(30px, 5vw, 72px); align-items: start; }
.additional-figure { min-width: 0; margin: 0; }
.additional-diagram { display: block; width: 100%; height: auto; aspect-ratio: 1122 / 510; border-radius: 7px; overflow: hidden; }
.additional-diagram image, .additional-preview image { pointer-events: none; }
.additional-region { cursor: pointer; }
.additional-region rect { fill: #6e845708; stroke: #697f5100; stroke-width: 2; transition: fill 180ms ease, stroke 180ms ease; }
.additional-region[data-active="true"] rect { fill: #71895915; stroke: #6b8155; }
.additional-region circle { fill: #f7f8f2; stroke: #98a68a; stroke-width: 2; transition: fill 180ms ease; }
.additional-region text { fill: #4b6038; font: 600 21px var(--font); text-anchor: middle; dominant-baseline: central; pointer-events: none; }
.additional-region[data-active="true"] circle { fill: #344b2a; stroke: #344b2a; }
.additional-region[data-active="true"] text { fill: white; }
.additional-options-intro { margin-top: 22px; color: #526346; font-size: 12px; }
.additional-part-buttons { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 7px; margin-top: 12px; scroll-margin-top: 25px; }
.additional-part-button { display: flex; align-items: center; gap: 8px; min-height: 51px; padding: 11px 10px; border: 1px solid #d6decc; border-radius: 5px; background: transparent; color: #526346; text-align: left; font-size: 11px; line-height: 1.35; transition: background 180ms ease, color 180ms ease; }
.additional-part-button > span:first-child { font-size: 9px; font-variant-numeric: tabular-nums; opacity: .8; }
.additional-part-button[aria-pressed="true"] { background: #344b2a; border-color: #344b2a; color: #fff; }
.additional-part-button:hover { border-color: #6b8155; }
.additional-part-button[data-preview="true"]:not([aria-pressed="true"]) { border-color: #6b8155; background: #e9efdf; }
.additional-part-button:focus-visible { outline: 3px solid #627c46; outline-offset: 3px; }
.additional-figure figcaption { margin-top: 14px; color: #75806b; font-size: 10px; line-height: 1.7; }
.additional-detail { min-width: 0; scroll-margin-block: 24px; }
.additional-preview { display: block; width: 100%; height: 184px; margin: 15px 0 13px; border-radius: 5px; overflow: hidden; background: #e4e8df; }
.additional-detail .kit-preview-caption { margin-top: 0; margin-bottom: 15px; }
.additional-overview { position: relative; display: flex; flex-direction: column; justify-content: center; gap: 18px; min-height: 184px; margin: 15px 0 23px; padding: 27px 24px; overflow: hidden; border: 1px solid #d6decc; border-radius: 5px; background: #edf0e6; }
.additional-overview-category { position: relative; z-index: 1; color: #667657; font-size: 10px; letter-spacing: .08em; text-transform: uppercase; }
.additional-overview p { position: relative; z-index: 1; max-width: 230px; padding-right: 18px; color: #344b2a; font-size: 22px; line-height: 1.3; }
.additional-overview-number { position: absolute; right: -4px; bottom: -35px; color: #344b2a0a; font-size: 160px; line-height: 1.3; font-weight: 500; }
.additional-back-options { display: none; }
.additional-detail .kit-detail-body h3 { font-size: clamp(29px, 3vw, 39px); }
.additional-detail .kit-detail-body h4 { margin-top: 18px; }
.additional-base-heading { padding-top: 29px; }
.additional-base-copy { max-width: 630px; padding-bottom: 22px; color: #637057; font-size: 13px; line-height: 1.75; }
.additional-base-copy .text-link { margin-top: 7px; font-size: 12px; }
@media (max-width: 1050px) {
  .additional-explorer-grid { grid-template-columns: minmax(0, 1.2fr) minmax(270px, .9fr); gap: 30px; }
  .additional-part-buttons { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 801px) {
  .additional-explorer-grid[data-window-detail="true"] { grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(24px, 3vw, 48px); }
  .additional-explorer-grid[data-window-detail="true"] .additional-part-buttons { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 800px) {
  .additional-explorer-grid { grid-template-columns: 1fr; gap: 28px; }
  .additional-detail { max-width: 100%; }
  .additional-back-options { display: inline-flex; margin-top: 24px; font-size: 12px; }
  .additional-preview { height: 220px; }
  .additional-part-buttons { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (max-width: 600px) {
  .additional-explorer { padding-bottom: 33px; }
  .additional-explorer .kit-explorer-heading { padding-bottom: 16px; }
  .additional-part-buttons { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 15px; }
  .additional-part-button { min-height: 48px; padding-inline: 12px; font-size: 12px; }
  .additional-preview { height: 188px; }
  .additional-detail .kit-detail-body h3 { font-size: 30px; }
  .additional-base-heading { padding-top: 23px; }
  .additional-base-copy { font-size: 12px; padding-bottom: 15px; }
}
@media (prefers-reduced-motion: reduce) {
  .additional-region rect, .additional-region circle, .additional-part-button { transition: none; }
}