/* ecoϕlab skill tree — deep green trunk, ochre fruit, cream paper */
.skill-tree-page, #st-root {
  --st-green: #0c2220;
  --st-green-mid: #163832;
  --st-ochre: #c08a34;
  --st-ochre-hot: #d5b267;
  --st-cream: #f4eed8;
  --st-rust: #994215;
  --st-ink: #0c2220;
  font-family: "Calibri", "Segoe UI", sans-serif;
  color: var(--st-ink);
}

#st-root {
  max-width: 1100px;
  margin: 0 auto 3rem;
}

.st-gate, .st-app {
  background: var(--st-cream);
  border: 1px solid color-mix(in srgb, var(--st-green) 18%, transparent);
  border-radius: 18px;
  padding: 1.6rem 1.6rem 2rem;
  box-shadow: 0 18px 40px color-mix(in srgb, var(--st-green) 12%, transparent);
}

.st-kicker {
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.72rem;
  color: var(--st-ochre);
  margin: 0 0 0.35rem;
}

.st-gate h2, .st-head h2 {
  font-family: "Trebuchet MS", sans-serif;
  color: var(--st-green);
  margin: 0 0 0.5rem;
}

.st-gate p, .st-blurb, .st-note {
  margin: 0 0 1rem;
  line-height: 1.45;
}

.st-btn {
  appearance: none;
  border: 0;
  border-radius: 999px;
  padding: 0.55rem 1.15rem;
  background: var(--st-green);
  color: var(--st-cream);
  font-weight: 600;
  cursor: pointer;
}
.st-btn.ghost {
  background: transparent;
  color: var(--st-green);
  border: 1px solid color-mix(in srgb, var(--st-green) 35%, transparent);
}
.st-btn:disabled { opacity: 0.45; cursor: not-allowed; }

.st-head {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1.1rem;
}
.st-who {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  font-size: 0.92rem;
}
.st-who img {
  width: 32px; height: 32px; border-radius: 50%;
}

.st-roles {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0 0 1.15rem;
}
.st-role {
  border: 1px solid color-mix(in srgb, var(--st-green) 25%, transparent);
  background: white;
  color: var(--st-green);
  border-radius: 999px;
  padding: 0.35rem 0.85rem;
  cursor: pointer;
  font-weight: 600;
}
.st-role[aria-pressed="true"] {
  background: var(--st-green);
  color: var(--st-cream);
  border-color: var(--st-green);
}

.st-progress {
  height: 8px;
  background: color-mix(in srgb, var(--st-green) 12%, white);
  border-radius: 99px;
  overflow: hidden;
  margin: 0.4rem 0 1.2rem;
}
.st-progress > span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--st-ochre), var(--st-ochre-hot));
  width: 0%;
  transition: width 0.35s ease;
}

.st-tree {
  display: grid;
  gap: 1.1rem;
}
.st-branch {
  position: relative;
  padding: 0.85rem 0.9rem 0.95rem 1.15rem;
  background: white;
  border-radius: 14px;
  border-left: 6px solid var(--st-green);
}
.st-branch h3 {
  font-family: "Trebuchet MS", sans-serif;
  font-size: 1.05rem;
  margin: 0 0 0.7rem;
  color: var(--st-green);
}
.st-nodes {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}
.st-node {
  --fill: transparent;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  max-width: 100%;
  text-align: left;
  border: 1.5px solid color-mix(in srgb, var(--st-green) 22%, transparent);
  background: var(--st-cream);
  border-radius: 999px;
  padding: 0.38rem 0.75rem 0.38rem 0.4rem;
  cursor: pointer;
  color: var(--st-green);
}
.st-node .dot {
  width: 18px; height: 18px; flex: 0 0 18px;
  border-radius: 50%;
  border: 2px solid var(--st-ochre);
  background: var(--fill);
}
.st-node.done {
  --fill: var(--st-ochre);
  border-color: var(--st-ochre);
  background: color-mix(in srgb, var(--st-ochre) 14%, white);
}
.st-node.locked {
  opacity: 0.55;
}
.st-node.active {
  outline: 2px solid var(--st-green);
  outline-offset: 2px;
}

.st-detail {
  margin-top: 1.15rem;
  padding: 1rem 1.1rem;
  background: var(--st-green);
  color: var(--st-cream);
  border-radius: 14px;
}
.st-detail h3 {
  font-family: "Trebuchet MS", sans-serif;
  margin: 0 0 0.4rem;
  color: var(--st-ochre-hot);
}
.st-detail a { color: var(--st-ochre-hot); }
.st-detail .st-links { margin: 0.6rem 0 0.85rem; padding-left: 1.1rem; }
.st-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }

.st-note {
  font-size: 0.88rem;
  color: color-mix(in srgb, var(--st-green) 70%, gray);
  margin-top: 1.2rem;
}

.st-error { color: var(--st-rust); }