.mrt-assembly-viewer{background:#fff!important;color:#243c46!important;border:1px solid #e0e9eb!important;border-radius:22px!important;padding:0!important;overflow:hidden;box-shadow:0 12px 35px #203b4808;font-family:Inter,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}.mrt-assembly-viewer *{box-sizing:border-box}.mrt-assembly-viewer button{font:inherit;cursor:pointer;border:1px solid #dce6e8;border-radius:10px;background:#fff;color:#365d58;padding:9px 12px;line-height:1.3;min-height:36px}.mrt-assembly-viewer button:hover:not(:disabled){background:#edf8f3;border-color:#8fc9b8}.mrt-assembly-viewer button:disabled{opacity:.3;cursor:default}.mrt-assembly-viewer button:focus-visible,.mrt-assembly-viewer:focus-visible{outline:3px solid #209b80;outline-offset:3px}.mrt-assembly-viewer .assembly-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:25px 26px;background:#f7faf9;border-bottom:1px solid #e7eeec}.mrt-assembly-viewer .assembly-heading small{color:#18826e;letter-spacing:2px;font-weight:700;font-size:11px}.mrt-assembly-viewer .assembly-heading h2{font-size:28px!important;line-height:1.3;margin:8px 0!important;color:#233d46!important}.mrt-assembly-viewer .assembly-heading p{margin:0;color:#7c8f96;font-size:12px}.mrt-assembly-viewer .assembly-tools{display:flex;gap:8px;font-size:12px}.mrt-assembly-viewer .assembly-meta{padding:18px 24px;display:flex;align-items:center;justify-content:space-between}.mrt-assembly-viewer .assembly-badge{font-size:12px;color:#14836c;background:#eaf7f0;padding:8px 12px;border-radius:8px}.mrt-assembly-viewer .assembly-count{font-size:13px;color:#6b838a}.mrt-assembly-viewer .assembly-stage{position:relative;height:490px;height:clamp(290px,53vh,560px);padding:0 68px}.mrt-assembly-viewer .assembly-scroll{height:100%;overflow:auto;display:flex;align-items:center;justify-content:center}.mrt-assembly-viewer .assembly-drawing{display:block;max-width:100%!important;max-height:100%;width:auto;height:auto;object-fit:contain;border-radius:18px}.mrt-assembly-viewer.assembly-zoomed .assembly-scroll{display:block}.mrt-assembly-viewer.assembly-zoomed .assembly-drawing{max-width:none!important;max-height:none;width:150%;height:auto}.mrt-assembly-viewer .assembly-prev,.mrt-assembly-viewer .assembly-next{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;border-radius:50%;padding:0;font-size:27px;box-shadow:0 4px 18px #23493c0b}.mrt-assembly-viewer .assembly-prev{left:14px}.mrt-assembly-viewer .assembly-next{right:14px}.mrt-assembly-viewer .assembly-note{display:flex;justify-content:space-between;gap:12px;padding:18px 24px;color:#82959b;font-size:11px}.mrt-assembly-viewer .assembly-status{margin:0 24px;color:#96783e;font-size:13px}.mrt-assembly-viewer .assembly-status:empty{display:none}.mrt-assembly-viewer [hidden]{display:none!important}.mrt-assembly-viewer .assembly-progress{height:3px;background:#edf3ef}.mrt-assembly-viewer .assembly-progress>div{height:100%;background:#219c80;transition:width .2s}.mrt-assembly-viewer .assembly-sequence{padding:20px 24px}.mrt-assembly-viewer .assembly-sequence-heading{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:15px;font-size:12px}.mrt-assembly-viewer .assembly-sequence-heading>div{display:flex;gap:6px}.mrt-assembly-viewer .assembly-sequence-heading button{font-size:12px;padding:6px 10px}.mrt-assembly-viewer .assembly-thumbnails{display:flex;position:relative;gap:10px;overflow-x:auto;scrollbar-width:thin;scrollbar-color:#bfded2 transparent;padding:4px 3px 12px}.mrt-assembly-viewer .assembly-thumbnail{flex:0 0 89px;min-width:0;padding:5px;border-radius:12px;border-color:#e1e9eb;font-size:10px}.mrt-assembly-viewer .assembly-thumbnail img{width:100%;height:62px;object-fit:contain;border-radius:8px}.mrt-assembly-viewer .assembly-thumbnail span{display:block;margin:6px 0 2px}.mrt-assembly-viewer .assembly-thumbnail[aria-current=true]{border:2px solid #209c7e;background:#f1faf5;padding:4px;box-shadow:0 0 0 3px #e8f6ee}.mrt-assembly-viewer .assembly-exit{position:fixed;top:12px;right:15px;z-index:20}.mrt-assembly-viewer:fullscreen{overflow:auto;border-radius:0!important;padding-top:50px!important}.mrt-assembly-viewer:fullscreen .assembly-stage{height:60vh}.mrt-assembly-viewer:-webkit-full-screen{overflow:auto;padding-top:50px!important}@media(max-width:650px){.mrt-assembly-viewer .assembly-heading{padding:20px 16px;align-items:flex-start}.mrt-assembly-viewer .assembly-heading h2{font-size:23px!important}.mrt-assembly-viewer .assembly-tools{flex-direction:column;flex-shrink:0;font-size:11px}.mrt-assembly-viewer .assembly-heading p{font-size:11px}.mrt-assembly-viewer .assembly-stage{padding:0 39px;height:42vh;min-height:260px}.mrt-assembly-viewer .assembly-prev,.mrt-assembly-viewer .assembly-next{width:32px;height:38px}.mrt-assembly-viewer .assembly-prev{left:3px}.mrt-assembly-viewer .assembly-next{right:3px}.mrt-assembly-viewer .assembly-note{padding:16px;font-size:10px}.mrt-assembly-viewer .assembly-note>span:last-child{display:none}.mrt-assembly-viewer .assembly-sequence{padding:18px 12px}.mrt-assembly-viewer .assembly-thumbnail{flex-basis:77px}.mrt-assembly-viewer .assembly-sequence-heading{font-size:11px}.mrt-assembly-viewer .assembly-sequence-heading button{padding:6px 8px;font-size:11px}}@media(prefers-reduced-motion:reduce){.mrt-assembly-viewer .assembly-progress>div{transition:none}}

.mrt-assembly-viewer.assembly-expanded{position:fixed!important;inset:0!important;width:100vw!important;height:100dvh!important;max-width:none!important;margin:0!important;z-index:2147483646!important;background:#fff!important;border-radius:0!important;padding-top:56px!important;overflow:auto!important}.mrt-assembly-viewer.assembly-expanded .assembly-stage{height:60vh}.mrt-assembly-viewer.assembly-expanded .assembly-exit{z-index:2147483647}

/* Each viewer keeps its own continuous zoom level. */
.mrt-assembly-viewer.assembly-zoomed .assembly-drawing{max-width:none!important;max-height:none!important;object-fit:contain;flex-shrink:0}

/* Full-screen reading: flexible large stage above an always-visible filmstrip. */
.mrt-assembly-viewer.assembly-expanded,.mrt-assembly-viewer:fullscreen{display:flex!important;flex-direction:column!important;height:100dvh!important;overflow:hidden!important;padding:0!important;border:0!important;max-width:none!important}
.mrt-assembly-viewer.assembly-expanded .assembly-heading,.mrt-assembly-viewer:fullscreen .assembly-heading{flex:0 0 auto;padding:10px 18px;gap:12px;min-height:62px;padding-right:165px}
.mrt-assembly-viewer.assembly-expanded .assembly-heading h2,.mrt-assembly-viewer:fullscreen .assembly-heading h2{font-size:18px!important;margin:2px 0!important}
.mrt-assembly-viewer.assembly-expanded .assembly-heading p,.mrt-assembly-viewer:fullscreen .assembly-heading p{display:none}
.mrt-assembly-viewer.assembly-expanded .assembly-tools,.mrt-assembly-viewer:fullscreen .assembly-tools{flex-direction:row;flex-wrap:wrap;gap:5px}
.mrt-assembly-viewer.assembly-expanded .assembly-meta,.mrt-assembly-viewer:fullscreen .assembly-meta{flex:0 0 auto;padding:5px 18px}
.mrt-assembly-viewer.assembly-expanded .assembly-badge,.mrt-assembly-viewer:fullscreen .assembly-badge{padding:4px 9px}
.mrt-assembly-viewer.assembly-expanded .assembly-stage,.mrt-assembly-viewer:fullscreen .assembly-stage{flex:1 1 0!important;height:auto!important;min-height:0!important;padding:0 52px}
.mrt-assembly-viewer.assembly-expanded .assembly-note,.mrt-assembly-viewer:fullscreen .assembly-note{flex:0 0 auto;padding:5px 18px}
.mrt-assembly-viewer.assembly-expanded .assembly-progress,.mrt-assembly-viewer:fullscreen .assembly-progress{flex:0 0 3px}
.mrt-assembly-viewer.assembly-expanded .assembly-sequence,.mrt-assembly-viewer:fullscreen .assembly-sequence{flex:0 0 auto;padding:7px 16px 3px;border-top:1px solid #e0e9eb;background:#f7faf9}
.mrt-assembly-viewer.assembly-expanded .assembly-sequence-heading,.mrt-assembly-viewer:fullscreen .assembly-sequence-heading{margin-bottom:3px}
.mrt-assembly-viewer.assembly-expanded .assembly-thumbnail,.mrt-assembly-viewer:fullscreen .assembly-thumbnail{flex-basis:74px;padding:3px}
.mrt-assembly-viewer.assembly-expanded .assembly-thumbnail img,.mrt-assembly-viewer:fullscreen .assembly-thumbnail img{height:45px}
.mrt-assembly-viewer.assembly-expanded .assembly-thumbnail span,.mrt-assembly-viewer:fullscreen .assembly-thumbnail span{margin:2px 0}
.mrt-assembly-viewer.assembly-expanded .assembly-exit{position:absolute;top:12px;right:12px}
.mrt-assembly-viewer .assembly-drawing,.mrt-assembly-viewer.assembly-zoomed .assembly-drawing{max-width:none!important;max-height:none!important;width:auto;height:auto;flex:none;object-fit:contain;border-radius:0}
.mrt-assembly-viewer.assembly-zoomed .assembly-drawing{max-width:none!important;max-height:none!important}
/* JS sizes the drawing from both available dimensions, then multiplies by zoom. */
.mrt-assembly-viewer .assembly-scroll{align-items:center;justify-content:center;overscroll-behavior:contain;touch-action:pan-x pan-y}
.mrt-assembly-viewer.assembly-zoomed .assembly-scroll{cursor:grab}
.mrt-assembly-viewer.assembly-zoomed .assembly-scroll.is-panning{cursor:grabbing}
.mrt-assembly-viewer.assembly-zoomed .assembly-drawing{user-select:none}
@media(max-width:650px){.mrt-assembly-viewer.assembly-expanded .assembly-heading{padding:8px 125px 8px 10px;min-height:64px}.mrt-assembly-viewer.assembly-expanded .assembly-heading small{font-size:9px;letter-spacing:1px}.mrt-assembly-viewer.assembly-expanded .assembly-heading h2{font-size:14px!important}.mrt-assembly-viewer.assembly-expanded .assembly-tools button{font-size:11px;padding:5px 7px;min-height:30px}.mrt-assembly-viewer.assembly-expanded .assembly-exit{font-size:11px;padding:7px;right:7px;top:10px}.mrt-assembly-viewer.assembly-expanded .assembly-stage{padding:0 36px}.mrt-assembly-viewer.assembly-expanded .assembly-note{display:none}.mrt-assembly-viewer.assembly-expanded .assembly-sequence{padding:5px 8px 0}.mrt-assembly-viewer.assembly-expanded .assembly-thumbnail img{height:36px}.mrt-assembly-viewer.assembly-expanded .assembly-thumbnail{flex-basis:62px}}
.mrt-assembly-viewer.assembly-expanded [data-assembly="full"]{display:none}
/* Keep the image dominant even on a wide laptop with limited vertical space. */
.mrt-assembly-viewer.assembly-expanded .assembly-heading{padding-top:6px;padding-bottom:6px;min-height:48px}
.mrt-assembly-viewer.assembly-expanded .assembly-heading h2{margin:0!important;line-height:1.2}
.mrt-assembly-viewer.assembly-expanded .assembly-heading small{font-size:9px;line-height:1.2}
.mrt-assembly-viewer.assembly-expanded .assembly-tools button{min-height:30px;padding:6px 10px}
.mrt-assembly-viewer.assembly-expanded .assembly-meta{padding-top:3px;padding-bottom:3px}
.mrt-assembly-viewer.assembly-expanded .assembly-badge{padding:2px 7px}
.mrt-assembly-viewer.assembly-expanded .assembly-note{display:none}
.mrt-assembly-viewer.assembly-expanded .assembly-sequence-heading button{min-height:26px;padding:3px 8px}
.mrt-assembly-viewer.assembly-expanded .assembly-thumbnails{padding-top:2px;padding-bottom:5px}
.mrt-assembly-viewer.assembly-expanded .assembly-thumbnail img{height:36px}

/* 401 source-reviewed assembly: actionable guide without changing original artwork. */
.mrt-assembly-viewer .assembly-phase-label{display:flex;align-items:center;gap:8px;font-size:11px;color:#58736f;min-width:0;margin:0 12px}
.mrt-assembly-viewer .assembly-phase-select{font:inherit;border:1px solid #d4e5df;border-radius:8px;padding:7px 26px 7px 9px;background:#fff;color:#24483e;max-width:270px}
.mrt-assembly-viewer .assembly-step-guide{margin:12px 24px 0;display:grid;grid-template-columns:1fr 1fr;gap:18px;padding:16px 18px;border:1px solid #dfeae7;border-radius:14px;background:#fbfdfc;line-height:1.55}
.mrt-assembly-viewer .assembly-guide-kicker{font-size:10px;letter-spacing:1.5px;font-weight:800;color:#16846b}
.mrt-assembly-viewer .assembly-step-guide h3{font-size:16px!important;line-height:1.35!important;margin:5px 0!important;color:#253f47!important}
.mrt-assembly-viewer .assembly-step-guide p{font-size:12px;margin:5px 0;color:#405b63;line-height:1.6}
.mrt-assembly-viewer .assembly-step-guide .assembly-guide-hint{font-size:11px;color:#617d81}
.mrt-assembly-viewer .assembly-check{border-left:1px solid #dce9e4;padding-left:18px}
.mrt-assembly-viewer .assembly-guide-source{display:block;font-size:10px;color:#7d9294;margin-top:8px}
.mrt-assembly-viewer .assembly-calibration{text-align:center;max-width:520px;padding:20px;line-height:1.6}
.mrt-assembly-viewer .assembly-calibration h3{font-size:22px!important;line-height:1.35!important;color:#2d4b53!important}
.mrt-assembly-viewer .assembly-calibration p{font-size:14px;color:#516c73}
.mrt-assembly-viewer .assembly-centre-symbol{display:inline-grid;place-items:center;border:3px solid #16846b;border-radius:50%;width:100px;height:100px;color:#16846b;background:#edf9f4;font-size:36px}
.mrt-assembly-viewer .assembly-centre-thumbnail{display:grid;place-items:center;height:62px;font-size:24px;color:#16846b;background:#eef8f3;border-radius:8px}
.mrt-build-optional{margin:18px 0;border:1px solid #d8e6e2;border-radius:14px;padding:16px;background:#f7faf9}
.mrt-build-optional>summary{cursor:pointer;font-weight:700;color:#2e6555;font-size:14px}
.mrt-build-optional>p{font-size:13px;line-height:1.6}
.mrt-assembly-viewer.assembly-expanded .assembly-step-guide{flex:0 0 auto;margin:3px 16px 6px;padding:7px 12px;max-height:27vh;overflow:auto;gap:12px}
.mrt-assembly-viewer.assembly-expanded .assembly-step-guide h3{font-size:13px!important;margin:2px 0!important}
.mrt-assembly-viewer.assembly-expanded .assembly-step-guide p{font-size:11px;margin:2px 0}
.mrt-assembly-viewer.assembly-expanded .assembly-guide-source{font-size:9px;margin-top:2px}
.mrt-assembly-viewer.assembly-expanded .assembly-centre-thumbnail{height:36px;font-size:20px}
@media(max-width:650px){.mrt-assembly-viewer .assembly-meta{flex-wrap:wrap;gap:8px;padding:12px 16px}.mrt-assembly-viewer .assembly-phase-label{order:3;flex-basis:100%;margin:0;justify-content:space-between}.mrt-assembly-viewer .assembly-phase-select{max-width:75%;width:auto}.mrt-assembly-viewer .assembly-step-guide{grid-template-columns:1fr;margin:8px 12px 0;padding:12px;gap:10px}.mrt-assembly-viewer .assembly-check{border-left:0;border-top:1px solid #dce9e4;padding:10px 0 0}.mrt-assembly-viewer.assembly-expanded .assembly-step-guide{max-height:24vh;margin:3px 8px;display:block}.mrt-assembly-viewer.assembly-expanded .assembly-check{margin-top:6px;padding-top:5px}.mrt-assembly-viewer.assembly-expanded .assembly-phase-label{flex-basis:auto;order:0}.mrt-assembly-viewer.assembly-expanded .assembly-phase-label{font-size:0}.mrt-assembly-viewer.assembly-expanded .assembly-phase-select{font-size:10px;max-width:180px;padding:3px 18px 3px 5px}}