/* ---------- dock ---------- */
.dock:empty {
  display: none;
}
.dock {
  position: fixed;
  bottom: calc(14px + env(safe-area-inset-bottom, 0px));
  left: 50%;
  transform: translateX(-50%);
  z-index: 40;
  display: flex;
  gap: 4px;
  padding: 6px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: 22px;
  box-shadow: 0 4px 0 var(--line);
}
.dock button {
  appearance: none;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 2px solid transparent;
  border-radius: 16px;
  background: transparent;
  font: inherit;
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  cursor: pointer;
} /* transitions: css/motion.css */
.dock button svg {
  width: 22px;
  height: 22px;
}
.dock button:active {
  transform: scale(0.93);
}
.dock button.on {
  background: var(--blue-dim);
  border-color: var(--blue-edge);
  color: var(--blue-ink);
}
@media (max-width: 480px) {
  .dock button {
    padding: 10px 18px;
  }
} /* tab names stay visible: there are only two tabs */
body.in-lesson .dock,
body.in-lesson .topbar {
  visibility: hidden;
}
body.in-lesson {
  overflow: hidden;
}

/* ---------- path page ---------- */
.path-page {
  padding-top: 6px;
}
.u-green {
  --u: var(--teal);
  --u-lip: var(--teal-lip);
  --u-soft: var(--teal-dim);
  --u-ink: var(--teal-ink);
  --u-on: #fff;
}
.u-blue {
  --u: var(--blue);
  --u-lip: var(--blue-lip);
  --u-soft: var(--blue-dim);
  --u-ink: var(--blue-ink);
  --u-on: #fff;
}
.u-violet {
  --u: var(--violet);
  --u-lip: var(--violet-lip);
  --u-soft: var(--violet-dim);
  --u-ink: var(--violet-ink);
  --u-on: #fff;
}
.u-orange {
  --u: var(--amber);
  --u-lip: var(--amber-lip);
  --u-soft: var(--amber-dim);
  --u-ink: var(--amber-ink);
  --u-on: #fff;
}
.unit-sticky {
  position: sticky;
  top: 64px;
  z-index: 20;
  margin-bottom: 18px;
}
.us-in {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px 14px 20px;
  border-radius: 18px;
  background: var(--u);
  box-shadow: 0 var(--lip) 0 var(--u-lip);
  color: var(--u-on);
  transition: background-color var(--dur-3) var(--ease-out);
}
.unit-sticky .us-in {
  background: var(--u);
}
.us-t {
  flex: 1;
  min-width: 0;
}
.us-t small {
  display: block;
  font-size: 12.5px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.9;
}
.us-t h2 {
  color: var(--u-on);
  margin: 2px 0 0;
  font-size: 20px;
  line-height: 1.2;
}
.us-guide {
  appearance: none;
  min-width: 44px;
  min-height: 44px;
  justify-content: center;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: 2px solid color-mix(in srgb, var(--u-on) 40%, transparent);
  border-radius: 14px;
  background: transparent;
  color: var(--u-on);
  font: inherit;
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  cursor: pointer;
  box-shadow: 0 3px 0 var(--u-lip);
  transition:
    transform var(--dur-1) ease-out,
    box-shadow var(--dur-1) ease-out,
    background-color var(--dur-2) ease;
}
.us-guide svg {
  width: 20px;
  height: 20px;
}
.us-guide:hover {
  background: rgba(255, 255, 255, 0.14);
}
.us-guide:active {
  transform: translateY(3px);
  box-shadow: none;
}
@media (max-width: 480px) {
  .us-guide span {
    font-size: 11px;
    letter-spacing: 0.04em;
  }
  .us-guide {
    gap: 5px;
    padding: 6px 10px;
  }
}
@media (min-width: 1000px) {
  .dock {
    left: calc(50% - 150px);
  }
}
.dock::before {
  content: "";
  position: absolute;
  left: 50%;
  width: 200vw;
  transform: translateX(-50%);
  bottom: calc(-14px - env(safe-area-inset-bottom, 0px));
  height: calc(100px + env(safe-area-inset-bottom, 0px));
  background: linear-gradient(to bottom, transparent, var(--bg));
  pointer-events: none;
  z-index: -1;
}

.unit-divider {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 26px 0 24px;
  color: var(--text-faint);
  font-size: 14px;
  font-weight: 800;
  text-align: center;
}
.unit-divider::before,
.unit-divider::after {
  content: "";
  flex: 1;
  height: 2px;
  background: var(--line);
}
.unit-divider span {
  max-width: 70%;
}

.path {
  position: relative;
  margin: 44px auto 0;
  max-width: 560px;
}
.p-row {
  position: absolute;
  left: 50%;
  width: 0;
  height: 104px;
  transform: translateX(calc(var(--k) * 90px));
}
@media (max-width: 480px) {
  .p-row {
    transform: translateX(calc(var(--k) * 64px));
  }
}
.p-node {
  --nc: var(--line);
  --nl: var(--node-off-lip);
  --nf: var(--node-off-ic);
  appearance: none;
  position: absolute;
  left: -36px;
  top: 14px;
  width: 72px;
  height: 66px;
  border: 0;
  padding: 0;
  border-radius: 50%;
  background: var(--nc);
  box-shadow: 0 7px 0 var(--nl);
  color: var(--nf);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition:
    transform var(--dur-1) ease-out,
    box-shadow var(--dur-1) ease-out,
    filter var(--dur-2) ease;
  -webkit-tap-highlight-color: transparent;
}
.p-face {
  display: grid;
  place-items: center;
  transition: transform var(--dur-3) var(--ease-spring);
}
.p-face svg {
  width: 32px;
  height: 32px;
}
.p-row.st-started .p-node,
.p-row.st-done .p-node,
.p-row.cur .p-node {
  --nc: var(--u);
  --nl: var(--u-lip);
  --nf: var(--u-on);
}
.p-row.boss .p-node {
  width: 84px;
  height: 76px;
  left: -42px;
  top: 10px;
}
.p-row.boss.st-done .p-node {
  --nc: var(--gold);
  --nl: #e0a800;
  --nf: var(--gold-on);
}
.p-ring {
  position: absolute;
  left: -11px;
  top: -11px;
  width: calc(100% + 22px);
  height: calc(100% + 26px);
  pointer-events: none;
  overflow: visible;
}
.p-row.cur .p-node::after {
  content: "";
  position: absolute;
  inset: -12px -12px -18px;
  border-radius: 50%;
  border: 4px solid var(--u-soft);
  pointer-events: none;
} /* breathes: css/motion.css m-breathe */
@media (hover: hover) and (pointer: fine) {
  .p-node:hover {
    filter: brightness(1.06);
  }
  .p-node:hover .p-face {
    transform: scale(1.14) rotate(-8deg);
  }
}
.p-node:active {
  transform: translateY(7px);
  box-shadow: 0 0 0 var(--nl);
}
.p-bubble {
  position: absolute;
  left: 0;
  top: -38px;
  transform: translateX(-50%);
  z-index: 2;
  background: var(--panel);
  color: var(--u-ink, var(--u));
  border: 2px solid var(--line);
  border-radius: 12px;
  padding: 5px 12px;
  font-size: 14px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
  pointer-events: none;
  animation: bubbleBob 2.2s ease-in-out infinite;
} /* in step with m-breathe (motion.css) */
.p-bubble::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 100%;
  width: 12px;
  height: 12px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-top: 0;
  border-left: 0;
  transform: translate(-50%, -6px) rotate(45deg);
}
@keyframes bubbleBob {
  0%,
  100% {
    transform: translateX(-50%) translateY(0);
  }
  50% {
    transform: translateX(-50%) translateY(-5px);
  }
}
.p-cast {
  position: absolute;
  z-index: 1;
}
.p-cast.left {
  left: 2%;
}
.p-cast.right {
  right: 2%;
}
@media (max-width: 480px) {
  .p-cast .mascot {
    --ms: 76px !important;
  }
  .p-cast.left {
    left: -4px;
  }
  .p-cast.right {
    right: -4px;
  }
}

.p-row:has(.node-pop) {
  z-index: 30;
}
.node-pop {
  position: absolute;
  left: 0;
  top: 96px;
  transform: translateX(-50%);
  z-index: 30;
  width: 290px;
  padding: 16px;
  border-radius: 18px;
  background: var(--u);
  color: var(--u-on);
  box-shadow: 0 5px 0 var(--u-lip);
  transform-origin: 50% 0;
  scroll-margin-bottom: 96px;
}
.node-pop::before {
  content: "";
  position: absolute;
  top: -8px;
  left: calc(50% - 9px + var(--ax, 0px));
  width: 18px;
  height: 18px;
  background: var(--u);
  transform: rotate(45deg);
  border-radius: 3px;
}
.node-pop b {
  display: block;
  font-size: 18px;
  font-weight: 900;
  line-height: 1.25;
  color: var(--u-on);
}
.node-pop small {
  display: block;
  margin: 2px 0 8px;
  font-weight: 800;
  opacity: 0.9;
}
.node-pop p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.45;
  opacity: 0.95;
}
.node-pop .btn {
  width: 100%;
  background: #fff;
  color: var(--u-ink);
  --b: #fff;
  --lipc: rgba(0, 0, 0, 0.12);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.node-pop .btn:hover {
  background: #fff;
  filter: brightness(0.97);
}
.path-end {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  margin: 40px 0 10px;
  text-align: center;
}
.path-end b {
  font-size: 20px;
  font-weight: 900;
  color: var(--ink);
}
.path-end.won b {
  color: var(--teal-ink);
}