/* ============================================================
   HUB — bubble navigator
   ============================================================ */
.hub-shell { background: var(--hub-bg); }
.hub-head {
  text-align: center; padding: 28px 24px 4px;
}
.hub-head h1 {
  font-size: clamp(32px, 4.2vw, 56px);
  line-height: 1; letter-spacing: -0.035em;
  font-weight: 600; margin: 12px 0 10px;
}
.hub-head h1 em {
  font-style: normal;
  background: var(--brand-grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hub-head p {
  font-size: 15px; line-height: 1.6;
  color: var(--ink-2);
  max-width: 620px; margin: 0 auto;
}

.hub-stage-wrap { position: relative; width: 100%; overflow: hidden; }
.hub-stage {
  position: relative;
  width: 1240px; height: 760px;
  margin: 0 auto;
  transform-origin: top left;
}

.bubble {
  position: absolute;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 1.5px solid var(--bub-color, var(--ink));
  background: radial-gradient(circle at 30% 25%,
                color-mix(in oklab, var(--bub-color) 18%, white) 0%,
                color-mix(in oklab, var(--bub-color) 8%,  white) 70%,
                white 100%);
  color: var(--bub-color, var(--ink));
  display: grid; grid-template-rows: auto 1fr;
  padding: 22px 24px;
  text-align: center;
  cursor: pointer;
  transition: transform .35s cubic-bezier(.2,.8,.2,1),
              box-shadow .35s, border-color .25s;
  box-shadow: 0 1px 0 rgba(0,0,0,0.04),
              0 18px 36px -22px color-mix(in oklab, var(--bub-color) 60%, transparent);
}
.bubble:hover {
  transform: translate(-50%, -50%) translateY(-4px) scale(1.03);
  box-shadow: 0 1px 0 rgba(0,0,0,0.04),
              0 28px 50px -20px color-mix(in oklab, var(--bub-color) 60%, transparent);
}
.bubble .ico {
  height: 32px; margin-bottom: 6px;
  display: grid; place-items: center;
}
.bubble .ico svg { width: 28px; height: 28px; }
.bubble .name {
  font-weight: 700; font-size: 17px;
  letter-spacing: -0.01em; line-height: 1.05;
  color: var(--bub-color);
}
.bubble .desc {
  margin-top: 8px;
  font-weight: 400; font-size: 12px; line-height: 1.4;
  color: var(--ink-2);
  max-width: 200px; margin-left: auto; margin-right: auto;
}
.bubble .model {
  margin-top: 10px;
  display: inline-block;
  font-family: "Geist Mono", monospace;
  font-size: 10px; letter-spacing: 0.08em;
  padding: 3px 8px; border-radius: 999px;
  background: color-mix(in oklab, var(--bub-color) 15%, white);
  color: var(--bub-color);
  border: 1px solid color-mix(in oklab, var(--bub-color) 30%, transparent);
}

/* Variant: pill (top + bottom) */
.pill {
  position: absolute;
  transform: translate(-50%, -50%);
  border-radius: 18px;
  border: 1.5px solid var(--bub-color, var(--ink));
  background: color-mix(in oklab, var(--bub-color) 8%, white);
  color: var(--bub-color);
  padding: 18px 26px;
  cursor: pointer;
  text-align: left;
  display: grid; grid-template-columns: auto 1fr; gap: 14px;
  align-items: center;
  transition: transform .3s, box-shadow .3s, border-color .25s;
  box-shadow: 0 14px 30px -22px color-mix(in oklab, var(--bub-color) 50%, transparent);
  width: 360px;
}
.pill:hover {
  transform: translate(-50%, -50%) translateY(-3px);
  box-shadow: 0 22px 40px -20px color-mix(in oklab, var(--bub-color) 60%, transparent);
}
.pill .ico { width: 36px; height: 36px;
  border-radius: 10px; display: grid; place-items: center;
  background: color-mix(in oklab, var(--bub-color) 18%, white);
}
.pill .ico svg { width: 22px; height: 22px; color: var(--bub-color); }
.pill .meta { display: flex; flex-direction: column; }
.pill .meta .name { font-weight: 700; font-size: 16px; line-height: 1.1; color: var(--bub-color); }
.pill .meta .desc { font-size: 12.5px; color: var(--ink-2); line-height: 1.35; margin-top: 2px; }

/* Center hub */
.center-hub {
  position: absolute;
  transform: translate(-50%, -50%);
  width: 180px; height: 180px;
  border-radius: 50%;
  background: color-mix(in oklab, var(--c-people) 12%, var(--paper));
  border: 1.5px dashed var(--rule-strong);
  display: grid; place-items: center;
  text-align: center;
  padding: 18px;
}
.center-hub .label {
  font-family: "Geist Mono", monospace;
  font-size: 10px; letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
  display: block;
}
.center-hub .name { font-weight: 600; font-size: 14px; line-height: 1.15; color: var(--ink); }
.center-hub .name em { font-style: normal; color: var(--c-people); }
.center-hub .desc { font-size: 11px; color: var(--ink-2); margin-top: 6px; line-height: 1.35; }

/* Connection wires */
.hub-stage svg.wires {
  position: absolute; inset: 0; width: 100%; height: 100%;
  pointer-events: none;
}
.hub-stage svg.wires path {
  fill: none;
  stroke: var(--rule-strong);
  stroke-width: 1.2;
  stroke-dasharray: 3 5;
  opacity: 0.5;
}