/* Cybersecurity & AI Trust · layers — concentric rings as a controllable legend + the layer's control sheet. */
.tsc-layers__ui{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:var(--bdh-gap-l);align-items:start}
.tsc-layers__left{display:flex;flex-direction:column;gap:clamp(24px,2.6vw,36px);min-width:0;position:sticky;top:var(--bdh-sticky)}

/* ---- diagram ---- */
.tsc-layers__diag{position:relative;width:100%;max-width:480px;margin-inline:auto;aspect-ratio:1}
.tsc-layers__svg{position:absolute;inset:0;width:100%;height:100%;overflow:visible}
.tsc-ring{cursor:pointer;transform-box:view-box;transform-origin:240px 240px;transition:transform .6s var(--e),opacity .5s var(--e)}
.tsc-ring__band{fill:var(--paper);stroke:var(--line-3);stroke-width:1;transition:fill .4s var(--e),stroke .4s var(--e)}
.tsc-ring--1 .tsc-ring__band,.tsc-ring--3 .tsc-ring__band{fill:var(--paper-2)}
.tsc-ring--5 .tsc-ring__band{stroke-dasharray:3 5}
.tsc-ring--4 .tsc-ring__band{fill:var(--blue-wash)}
.tsc-ring__t{font-family:var(--f);font-size:9.5px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;fill:var(--muted);transition:fill .4s var(--e)}
.tsc-ring__node{fill:var(--paper);stroke:var(--line-3);stroke-width:1;transition:fill .4s var(--e),stroke .4s var(--e)}
.tsc-layers__diag:has(.tsc-ring.is-on) .tsc-ring:not(.is-on){opacity:.42}
.tsc-ring:hover{opacity:1}
.tsc-ring.is-on{transform:scale(1.035)}
.tsc-ring.is-on .tsc-ring__band{fill:var(--blue-wash-2);stroke:var(--blue)}
.tsc-ring.is-on .tsc-ring__t{fill:var(--ink)}
.tsc-ring.is-on .tsc-ring__node{fill:var(--blue);stroke:var(--blue)}
.tsc-layers__core{fill:var(--ink)}
.tsc-layers__corelbl{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);max-width:70px;text-align:center;font-family:var(--f);font-size:9.5px;font-weight:500;letter-spacing:.12em;text-transform:uppercase;line-height:1.35;color:var(--on-ink);pointer-events:none}

/* probes: requests travelling inward, each stopped by a different ring */
.tsc-probe__path{stroke:var(--ink);stroke-width:1;stroke-dasharray:2 4;opacity:.35}
.tsc-probe{transform:translate(var(--x1),var(--y1));opacity:0}
.tsc-probe__dot{fill:var(--blue)}
.tsc-probe__stop circle{fill:var(--paper);stroke:var(--ink);stroke-width:1.2}
.tsc-probe__stop path{stroke:var(--ink);stroke-width:1.5;stroke-linecap:round}
.is-live .tsc-probe{animation:tsc-probe 4.5s var(--e-io) infinite;animation-delay:var(--dl)}
.is-live .tsc-probe__stop{animation:tsc-stop 4.5s var(--e) infinite;animation-delay:var(--dl)}
@keyframes tsc-probe{0%{transform:translate(var(--x0),var(--y0));opacity:0}8%{opacity:1}52%{transform:translate(var(--x1),var(--y1));opacity:1}62%,100%{transform:translate(var(--x1),var(--y1));opacity:0}}
@keyframes tsc-stop{0%,50%{opacity:.35}56%{opacity:1}80%{opacity:1}100%{opacity:.35}}

/* ---- legend tabs ---- */
.tsc-layers__tabs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.tsc-layers__tab{display:grid;grid-template-columns:30px minmax(0,1fr) auto;align-items:center;gap:10px;min-height:52px;padding:8px 12px 8px 8px;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--paper);
  text-align:left;color:var(--ink);transition:border-color var(--d1) var(--e-io),background var(--d1) var(--e-io),color var(--d1) var(--e-io)}
.tsc-layers__tab:hover{border-color:var(--line-3);background:var(--paper-2)}
.tsc-layers__ti{display:grid;place-items:center;width:30px;height:30px;border-radius:7px;background:var(--paper-3)}
.tsc-layers__tn{font-size:var(--t-sm);font-weight:500;line-height:1.25}
.tsc-layers__tk{font-family:var(--f);font-size:10px;font-weight:500;letter-spacing:.06em;color:var(--faint)}
.tsc-layers__tab[aria-selected="true"]{border-color:var(--ink);background:var(--ink);color:var(--on-ink)}
.tsc-layers__tab[aria-selected="true"] .tsc-layers__ti{background:var(--on-ink-card);color:var(--on-ink)}
.tsc-layers__tab[aria-selected="true"] .tsc-layers__tk{color:var(--on-ink-3)}

/* ---- the control sheet ---- */
.tsc-layers__panes{min-width:0}
.tsc-layers__pane{padding:clamp(26px,3vw,44px);border:1px solid var(--line);border-radius:var(--r-xl);background:var(--paper);box-shadow:var(--sh-1)}
.tsc-layers__ph{display:flex;align-items:center;gap:18px}
.tsc-layers__pico{display:grid;place-items:center;width:56px;height:56px;flex:none;border-radius:var(--r);background:var(--blue-wash);color:var(--ink)}
.tsc-layers__pk{font-family:var(--f);font-size:var(--t-lbl);font-weight:500;letter-spacing:.12em;text-transform:uppercase;color:var(--blue);line-height:1.3}
.tsc-layers__pk i{font-style:normal;color:var(--ghost)}
.tsc-layers__pt{margin-top:8px;font-family:var(--f-h);font-size:clamp(1.5rem,2.2vw,2rem);font-weight:500;letter-spacing:-.022em;line-height:1.1;color:var(--ink)}
.tsc-layers__pd{margin-top:18px;max-width:58ch;font-size:var(--t-body);line-height:1.65;color:var(--muted)}

.tsc-layers__ctl{margin-top:26px;border-top:1px solid var(--line-2)}
.tsc-layers__ctl li{display:grid;grid-template-columns:16px minmax(0,1fr) auto;align-items:start;gap:14px;padding-block:14px;border-bottom:1px solid var(--line-2)}
.tsc-layers__ctl .tsc-tick{margin-top:2px}
.tsc-layers__cn{font-size:var(--t-sm);line-height:1.55;color:var(--txt)}
.tsc-layers__ctl .tsc-kbd{margin-top:1px}
.tsc-layers__pane.is-on .tsc-layers__ctl li{animation:tsc-ctl-in .5s var(--e) both;animation-delay:calc(var(--i,0) * 60ms + 80ms)}
@keyframes tsc-ctl-in{from{opacity:0;transform:translateX(-8px)}to{opacity:1;transform:none}}

.tsc-layers__foot{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px var(--bdh-gap);margin-top:26px}
.tsc-layers__foot dt{font-family:var(--f);font-size:var(--t-lbl);font-weight:500;letter-spacing:.12em;text-transform:uppercase;color:var(--faint);line-height:1.3}
.tsc-layers__foot dd{margin-top:10px;font-size:var(--t-sm);line-height:1.55;color:var(--ink)}
.tsc-layers__maps{display:flex;flex-wrap:wrap;gap:6px}
.tsc-layers__maps span{display:inline-flex;align-items:center;min-height:26px;padding:3px 9px;border-radius:var(--r-xs);box-shadow:inset 0 0 0 1px var(--line-3);font-family:var(--f);font-size:10.5px;font-weight:500;line-height:1.35;color:var(--ink)}
.tsc-layers__tools{grid-column:1 / -1;padding-top:20px;border-top:1px solid var(--line-2)}
.tsc-layers__tl{display:flex;flex-wrap:wrap;gap:8px}
.tsc-layers__tl li{display:inline-flex;align-items:center;gap:9px;min-height:40px;padding:6px 14px 6px 10px;border:1px solid var(--line);border-radius:var(--r-pill);background:var(--paper);font-size:var(--t-sm);font-weight:500;color:var(--ink);white-space:nowrap}
.tsc-layers__tl .xt-logo--word{--xt-word:.625rem;padding:.2em .45em}
.tsc-layers__tl li:has(.xt-logo--word) span{display:none}

@media (max-width:1023px){
  .tsc-layers__ui{grid-template-columns:minmax(0,1fr)}
  .tsc-layers__left{position:static}
  .tsc-layers__diag{max-width:420px}
}
@media (max-width:600px){
  .tsc-layers__tabs{grid-template-columns:minmax(0,1fr)}
  .tsc-layers__foot{grid-template-columns:minmax(0,1fr)}
  .tsc-ring__t{display:none}
  .tsc-layers__ctl li{grid-template-columns:16px minmax(0,1fr)}
  .tsc-layers__ctl .tsc-kbd{grid-column:2;justify-self:start;margin-top:-6px}
}
@media (prefers-reduced-motion:reduce){
  .tsc-ring{transition:none}
  .tsc-layers__pane.is-on .tsc-layers__ctl li{animation:none}
}