/* Tier path: five graded Crates on pedestals, joined by a cable (after nullmask.io's roadmap art). */

.tiers { padding-top: 0; }
.tiers .container { padding-top: var(--section-y); border-top: 1px solid var(--nm-line); }

.tier-path {
  --active: 0;
  --progress: 0;
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: clamp(8px, 1.4vw, 20px);
  align-items: stretch;
}

.tier { position: relative; z-index: 1; display: flex; }

.tier__btn {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  width: 100%;
  height: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
}
.tier__crate {
  display: block;
  padding-inline: 4%;
  transition: transform 500ms var(--ease-out);
}
.tier__crate .crate { width: 100%; height: auto; }
.tier.is-active .tier__crate { transform: translateY(-10px); }
.tier.is-active .crate-lid { transform: translateY(-20px); }
.tier.is-active .crate-leak { opacity: 1; }

.tier__meta {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 10px;
  padding: 14px 14px 16px;
  border: 1px solid var(--nm-black);
  border-radius: var(--r);
  background: var(--nm-bg);
  transition: background-color 300ms, box-shadow 300ms var(--ease), transform 300ms var(--ease);
}
.tier__grade {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--nm-muted);
}
.tier__grade::before {
  content: '';
  width: 12px;
  height: 12px;
  border: 1px solid var(--nm-black);
  border-radius: 3px;
  background: var(--c);
}
.tier__name { font-size: clamp(20px, 1.8vw, 26px); font-weight: 600; letter-spacing: -0.01em; line-height: 1.15; }
.tier__line { font-size: 13.5px; line-height: 1.45; color: var(--nm-muted); }

.tier.is-active .tier__meta { transform: translate(-3px, -3px); box-shadow: 6px 6px 0 var(--nm-black); }
.tier.is-passed .tier__meta,
.tier.is-active .tier__meta { background: color-mix(in srgb, var(--c) 30%, var(--nm-bg)); }
.tier:last-of-type .tier__name { letter-spacing: 0; }
.tier__btn:focus-visible { outline-offset: 6px; border-radius: var(--r); }

/* Cable running behind the pedestals. */
.tier-path__cable {
  position: absolute;
  z-index: 0;
  left: 6%;
  right: 6%;
  top: calc(var(--cable-top, 38%));
  height: 16px;
  border: 1.5px solid var(--nm-black);
  border-radius: 99px;
  background: var(--nm-bg);
  box-shadow: 0 4px 0 var(--nm-black);
  pointer-events: none;
}
.tier-path__fill {
  position: absolute;
  left: 3px;
  top: 3px;
  bottom: 3px;
  width: calc(var(--progress) * (100% - 6px));
  min-width: 8px;
  border-radius: 99px;
  background: var(--nm-lime);
  transition: width 600ms var(--ease-out);
}

@media (max-width: 1100px) {
  .tier__line { font-size: 12.5px; }
}

@media (max-width: 900px) {
  .tier-path { --tc: clamp(104px, 22vw, 172px); grid-template-columns: 1fr; gap: 14px; }
  .tier__btn { flex-direction: row; align-items: center; gap: 14px; }
  .tier__crate { flex: 0 0 var(--tc); padding: 0; }
  .tier__meta { flex: 1; min-height: 0; margin-top: 0; }
  .tier.is-active .tier__crate { transform: translateY(-4px); }
  .tier-path__cable {
    left: calc(var(--tc) / 2 - 8px);
    right: auto;
    top: 40px;
    bottom: 40px;
    width: 16px;
    height: auto;
    box-shadow: 4px 0 0 var(--nm-black);
  }
  .tier-path__fill {
    width: auto;
    right: 3px;
    height: calc(var(--progress) * (100% - 6px));
    bottom: auto;
    min-height: 8px;
    transition: height 600ms var(--ease-out);
  }
}