:root {
  --farm-nav-height: 98px;
  --farm-nav-z: 1000;
  --farm-nav-font: "Nunito", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --farm-nav-label: #fff8de;
  --farm-nav-label-active: #3c2516;
  --farm-nav-active-panel: url("../ui/nav-active-panel.svg");
}

.farm-nav {
  box-sizing: border-box;
  position: fixed;
  z-index: var(--farm-nav-z);
  inset-inline: 0;
  bottom: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  height: calc(var(--farm-nav-height) + env(safe-area-inset-bottom, 0px));
  padding: 0 max(4px, env(safe-area-inset-right, 0px)) env(safe-area-inset-bottom, 0px) max(4px, env(safe-area-inset-left, 0px));
  background: transparent;
  border-top: 0;
  box-shadow: none;
  font-family: var(--farm-nav-font);
  -webkit-tap-highlight-color: transparent;
  isolation: isolate;
}

.farm-nav *, .farm-nav *::before, .farm-nav *::after { box-sizing: border-box; }

.farm-nav__item {
  position: relative;
  min-width: 0;
  height: var(--farm-nav-height);
  margin: 0;
  padding: 3px 2px 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 0;
  overflow: visible;
  border: 0;
  background: transparent;
  color: var(--farm-nav-label);
  cursor: pointer;
  touch-action: manipulation;
}

.farm-nav__item::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: -4px -2px 0;
  background: var(--farm-nav-active-panel) center top / 100% 100% no-repeat;
  opacity: 0;
  transform: translateY(8px) scale(.94);
  transition: opacity 160ms ease, transform 180ms cubic-bezier(.2, .8, .2, 1);
}

.farm-nav__item.is-active::before { opacity: 1; transform: translateY(0) scale(1); }

.farm-nav__visual {
  position: relative;
  width: clamp(54px, 17.2vw, 80px);
  height: clamp(54px, 17.2vw, 80px);
  display: grid;
  place-items: center;
  margin-bottom: -1px;
  transition: transform 180ms cubic-bezier(.2, .8, .2, 1), filter 180ms ease;
}

.farm-nav__icon {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
  user-select: none;
  filter: saturate(.92) brightness(.93);
  transform: translateY(3px) scale(.92);
  transition: transform 180ms cubic-bezier(.2, .8, .2, 1), filter 180ms ease;
}

.farm-nav__item.is-active .farm-nav__icon {
  filter: saturate(1.08) brightness(1.05) drop-shadow(0 2px 1px rgba(74, 42, 12, .25));
  transform: translateY(-2px) scale(1.04);
}

.farm-nav__label {
  z-index: 1;
  max-width: 100%;
  min-height: 22px;
  padding-inline: 2px;
  overflow: hidden;
  color: inherit;
  font-size: clamp(11px, 3.7vw, 18px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -.02em;
  text-align: center;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-shadow:
    -1.5px -1.5px 0 #3c2a16,
    1.5px -1.5px 0 #3c2a16,
    -1.5px 1.5px 0 #3c2a16,
    1.5px 1.5px 0 #3c2a16,
    0 3px 2px rgba(0, 0, 0, .45);
  transition: color 160ms ease, text-shadow 160ms ease;
}

.farm-nav__item.is-active { color: var(--farm-nav-label-active); }
.farm-nav__item.is-active .farm-nav__label {
  text-shadow:
    -1px -1px 0 #fff6cc,
    1px -1px 0 #fff6cc,
    -1px 1px 0 #fff6cc,
    1px 1px 0 #fff6cc,
    0 2px 1px rgba(99, 56, 17, .26);
}

.farm-nav__badge {
  position: absolute;
  z-index: 3;
  top: 5px;
  inset-inline-end: 1px;
  display: grid;
  place-items: center;
  border: 2px solid #fff4cb;
  border-radius: 999px;
  background: linear-gradient(180deg, #ff6454, #d92722);
  box-shadow: 0 2px 0 #7b251b, 0 3px 5px rgba(49, 19, 9, .42);
  color: #fff;
  font: 900 12px/1 var(--farm-nav-font);
}

.farm-nav__badge--dot { width: 17px; height: 17px; }
.farm-nav__badge--count { min-width: 23px; height: 22px; padding-inline: 5px; }

.farm-nav__item:focus-visible {
  outline: 3px solid #fff4a7;
  outline-offset: -5px;
  border-radius: 12px 12px 0 0;
}

.farm-nav__item:active .farm-nav__visual { transform: scale(.93); }

@media (min-width: 640px) {
  :root { --farm-nav-height: 106px; }
  .farm-nav { left: 50%; right: auto; width: min(100%, 720px); transform: translateX(-50%); border-inline: 0; }
  .farm-nav__visual { width: 82px; height: 82px; }
  .farm-nav__label { font-size: 17px; }
}

@media (max-width: 350px) {
  :root { --farm-nav-height: 88px; }
  .farm-nav__visual { width: 58px; height: 58px; }
  .farm-nav__label { font-size: 11px; min-height: 18px; }
  .farm-nav__badge { top: 4px; transform: scale(.88); }
}

@media (prefers-reduced-motion: reduce) {
  .farm-nav__item::before, .farm-nav__visual, .farm-nav__icon { transition: none; }
}