.fiber-atlas { --fiber-accent: #78dfd2; position: relative; isolation: isolate; padding-top: 18px; }
.fiber-masthead { display: flex; align-items: center; justify-content: space-between; gap: 15px; padding-bottom: 16px; border-bottom: 1px solid #2a4756; color: #9fc0cd; font: 10px/1.8 Consolas, monospace; letter-spacing: .055em; }
.fiber-masthead::before { content: ""; position: absolute; top: 0; left: 0; width: 50px; height: 2px; background: #70ddcf; }
.fiber-masthead > span:last-child { color: #859fb1; font-size: 9px; text-align: right; }
.fiber-art { margin: 7px -20px -7px; }
.fiber-drawing { display: block; width: 100%; height: auto; overflow: visible; }
.fiber-buildings, .fiber-main-cable, .fiber-alternative-cable, .fiber-alternative-label, .fiber-splice-detail, .fiber-verification, .fiber-receiver, .fiber-event-markers { transition: opacity .4s ease, translate .6s cubic-bezier(.2,.7,.2,1); }
.fiber-alternative-cable, .fiber-alternative-label, .fiber-splice-detail, .fiber-verification, .fiber-receiver { opacity: 0; }
.fiber-splice-detail { translate: 0 12px; }
.fiber-atlas[data-alternative="true"] .fiber-alternative-cable, .fiber-atlas[data-alternative="true"] .fiber-alternative-label { opacity: 1; }
.fiber-atlas[data-alternative="true"] .fiber-main-cable { opacity: .45; }
.fiber-atlas[data-view="splice"] .fiber-buildings { opacity: .38; }
.fiber-atlas[data-view="splice"] .fiber-main-cable { opacity: .6; }
.fiber-atlas[data-view="splice"] .fiber-splice-detail { opacity: 1; translate: 0 0; }
.fiber-atlas[data-view="verify"] { --fiber-accent: #93e1bb; }
.fiber-atlas[data-view="verify"] .fiber-buildings { opacity: .63; }
.fiber-atlas[data-view="verify"] .fiber-verification { opacity: 1; }
.fiber-atlas[data-view="verify"][data-test="loss"] .fiber-receiver { opacity: 1; }
.fiber-atlas[data-view="verify"][data-test="loss"] .fiber-event-markers { opacity: 0; }
.fiber-tabs { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 5px; padding-block: 5px; border-block: 1px solid #2c4857; }
.fiber-tabs > button { min-width: 0; display: flex; align-items: center; justify-content: center; gap: 10px; min-height: 47px; padding: 9px 5px; border: 0; border-radius: 3px; background: transparent; color: #a8bece; font-size: 14px; }
.fiber-tabs > button > span { font: 10px Consolas, monospace; color: #809faf; }
.fiber-tabs > button[aria-selected="true"] { color: var(--fiber-accent); background: color-mix(in srgb,var(--fiber-accent) 7%,transparent); box-shadow: inset 0 -2px 0 var(--fiber-accent); }
.fiber-tabs > button[aria-selected="true"] > span { color: inherit; }
.fiber-tabs > button:hover { color: #e2f6f3; }
.fiber-tabs > button:focus-visible { outline-offset: 1px; }
.fiber-panel { min-height: 276px; padding-top: 25px; }
.fiber-panel-label { color: var(--fiber-accent); font: 11px/1.7 Consolas, monospace; letter-spacing: .06em; }
.fiber-panel > h2 { margin: 12px 0 14px; color: #e1eef5; font-size: 30px; line-height: 1.17; font-weight: 450; letter-spacing: -.04em; white-space: pre-line; }
.fiber-panel-description { color: #aac1d0; font-size: 15px; line-height: 1.85; max-width: 570px; }
.fiber-action { display: inline-flex; align-items: center; gap: 23px; min-height: 44px; margin-top: 18px; padding: 11px 15px; border: 1px solid #458c88; border-radius: 5px; background: #14302f; color: #a4e7d8; font-size: 13px; }
.fiber-action > span:last-child { font-size: 20px; line-height: 1; }
.fiber-action:hover { background: #1b4140; border-color: #84dbc9; }
.fiber-disclaimer { margin-top: 23px; padding-top: 17px; border-top: 1px solid #294351; color: #97b0bf; font-size: 11px; line-height: 1.8; }
.fiber-sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
@media (min-width: 801px) {
    body:has(.fiber-atlas) .detail-hero-grid { grid-template-columns: 1fr 1.06fr; gap: 63px; }
    body:has(.fiber-atlas) .detail-title { font-size: clamp(40px,4.5vw,65px); }
}
@media (max-width: 1100px) and (min-width: 801px) {
    body:has(.fiber-atlas) .detail-hero-grid { gap: 39px; }
    .fiber-tabs > button { font-size: 12px; gap: 6px; }
    .fiber-panel { min-height: 305px; }
    .fiber-panel > h2 { font-size: 27px; }
}
@media (max-width: 640px) {
    .fiber-masthead { font-size: 9px; gap: 12px; }
    .fiber-masthead > span:last-child { font-size: 8px; max-width: 100px; }
    .fiber-art { margin-inline: -17px; margin-bottom: -3px; }
    .fiber-graphic-labels { display: none; }
    .fiber-tabs > button { flex-direction: column; gap: 5px; min-height: 54px; font-size: 12px; }
    .fiber-panel { min-height: 320px; padding-top: 22px; }
    .fiber-panel > h2 { font-size: 28px; }
    .fiber-panel-label { font-size: 10px; }
    .fiber-action { width: 100%; justify-content: space-between; gap: 15px; }
}
@media (prefers-reduced-motion: reduce) {
    .fiber-atlas *, .fiber-atlas *::before, .fiber-atlas *::after { transition: none !important; animation: none !important; }
}