/* Vintage Story tech tree — dark + bronze/brass accent */

#vstt, .vintagestory-techtree {
  --vstt-text: #f1f5f9;
  --vstt-text-strong: #fff;
  --vstt-muted: #94a3b8;
  --vstt-border: #334155;
  --vstt-bg: #1c1814;
  --vstt-bg-alt: #0f0c09;
  --vstt-accent: #c8a169;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--vstt-bg);
  color: var(--vstt-text);
  border: 1px solid var(--vstt-border);
  border-radius: 12px;
  padding: 24px 24px 20px;
  margin: 28px 0;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.45);
  width: 100%;
  display: block;
}

#vstt *, .vintagestory-techtree * { box-sizing: border-box; }

.vstt-head h3 { margin: 0 0 4px; color: var(--vstt-text-strong); font-size: 1.2rem; }
.vstt-head p { margin: 0 0 16px; color: var(--vstt-muted); font-size: 0.95rem; }

.vstt-ladder {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 8px;
  margin-bottom: 18px;
}

.vstt-tile {
  flex: 1 1 130px;
  background: var(--vstt-bg-alt);
  border: 2px solid var(--vstt-border);
  border-radius: 10px;
  padding: 12px 10px;
  cursor: pointer;
  font: inherit;
  color: var(--vstt-text);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  transition: border-color .15s, transform .15s, background .15s;
}

.vstt-tile:hover { border-color: var(--vstt-tier-color); transform: translateY(-1px); }
.vstt-tile--active {
  border-color: var(--vstt-tier-color);
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(0,0,0,0.3));
  box-shadow: 0 0 0 1px var(--vstt-tier-color), 0 6px 18px rgba(0,0,0,0.3);
}

.vstt-tile-icon { font-size: 1.6rem; line-height: 1; }
.vstt-tile-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--vstt-tier-color);
  text-align: center;
}
.vstt-tile-days {
  font-size: 0.75rem;
  color: var(--vstt-muted);
  font-family: 'Courier New', monospace;
}

.vstt-arrow {
  display: flex;
  align-items: center;
  color: var(--vstt-muted);
  font-size: 1.2rem;
  font-weight: 700;
}

@media (max-width: 540px) {
  .vstt-ladder { flex-direction: column; }
  .vstt-arrow { transform: rotate(90deg); justify-content: center; }
}

.vstt-detail-card {
  background: linear-gradient(135deg, rgba(255,255,255,0.04) 0%, rgba(0,0,0,0.2) 100%);
  border: 1px solid var(--vstt-tier-color, var(--vstt-accent));
  border-radius: 12px;
  padding: 20px 22px;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.02), 0 8px 24px rgba(0,0,0,0.3);
}

.vstt-detail-headline {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--vstt-border);
}

.vstt-detail-icon { font-size: 2.4rem; line-height: 1; }
.vstt-detail-title-wrap h3 {
  margin: 0 0 2px;
  color: var(--vstt-tier-color);
  font-size: 1.4rem;
  letter-spacing: 0.5px;
}
.vstt-detail-title-wrap p { margin: 0; color: var(--vstt-text); font-size: 0.95rem; }

.vstt-section { margin: 12px 0; }
.vstt-section h4 {
  margin: 0 0 6px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
  color: var(--vstt-muted);
}
.vstt-section p { margin: 0; color: var(--vstt-text); line-height: 1.55; font-size: 0.93rem; }
.vstt-section ul { margin: 0; padding-left: 20px; line-height: 1.8; font-size: 0.93rem; }

.vstt-section--gating {
  background: rgba(200, 161, 105, 0.06);
  border-left: 3px solid var(--vstt-tier-color);
  padding: 10px 14px;
  border-radius: 0 8px 8px 0;
}
.vstt-section--priority {
  background: rgba(255,255,255,0.03);
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--vstt-border);
}
.vstt-section strong { color: var(--vstt-muted); font-weight: 700; }

.vstt-gate-grid { display: grid; gap: 6px; }

.vstt-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin: 12px 0;
}
@media (max-width: 540px) { .vstt-cols { grid-template-columns: 1fr; } }

.vstt-helpers {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--vstt-border);
}

.vstt-action {
  background: var(--vstt-bg-alt);
  border: 1px solid var(--vstt-border);
  border-radius: 8px;
  padding: 8px 14px;
  font: inherit;
  font-size: 0.88rem;
  color: var(--vstt-text);
  cursor: pointer;
}
.vstt-action:hover { background: var(--vstt-accent); border-color: var(--vstt-accent); color: var(--vstt-bg); }

.vstt-helper-link {
  margin-left: auto;
  color: var(--vstt-accent);
  font-weight: 600;
  text-decoration: none;
  font-size: 0.92rem;
}
.vstt-helper-link:hover { text-decoration: underline; }

.vstt-cta {
  margin-top: 14px;
  background: linear-gradient(135deg, var(--vstt-accent) 0%, #8b6f3d 100%);
  color: #1c1814;
  border-radius: 10px;
  padding: 14px 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 6px 18px rgba(200, 161, 105, 0.25);
}

.vstt-cta-text { display: flex; flex-direction: column; gap: 2px; font-size: 0.92rem; color: #1c1814; }
.vstt-cta-text strong { font-size: 0.98rem; color: #1c1814; }
.vstt-cta-btn {
  background: var(--vstt-bg);
  color: var(--vstt-accent);
  font-weight: 700;
  text-decoration: none;
  padding: 9px 18px;
  border-radius: 8px;
  font-size: 0.92rem;
}
.vstt-cta-btn:hover { background: var(--vstt-bg-alt); }