/* Bottom dock — 4 tabs. Shared by / and /live/. */
.edu-dock {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 80;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  padding: 0.35rem 0.4rem calc(0.4rem + env(safe-area-inset-bottom, 0px));
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  border-top: 1px solid #d5e3ea;
  box-shadow: 0 -10px 30px rgba(15, 36, 48, 0.06);
}
.edu-dock a {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.18rem;
  min-height: 52px;
  border-radius: 14px;
  color: #4a6270;
  font-family: "Sora", system-ui, sans-serif;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
}
.edu-dock a svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.edu-dock a.is-on {
  color: #0b4db8;
  background: linear-gradient(180deg, rgba(31, 111, 235, 0.12), rgba(26, 166, 160, 0.08));
}
.edu-dock a:hover { color: #0f2430; }
body.edu-has-dock {
  padding-bottom: calc(76px + env(safe-area-inset-bottom, 0px));
}
footer.note { padding-bottom: 1rem; }