.terrain-layout { grid-template-columns: 360px 1fr 330px; }
.topnav { margin-top: 10px; display: flex; gap: 12px; }
.topnav a { color: #cbd7ea; text-decoration: none; border: 1px solid #50607a; padding: 6px 10px; border-radius: 8px; }
.topnav a:hover { background: #1d2a3c; }
.terrain-main canvas { width: 100%; height: auto; border: 1px solid var(--border); border-radius: 8px; background: #f8fafc; cursor: crosshair; }
.info-box { border: 1px solid var(--border); border-radius: 8px; padding: 10px; background: #fafcff; font-size: 13px; color: var(--muted); }
.workflow { padding-left: 20px; color: var(--muted); font-size: 14px; line-height: 1.5; }
@media (max-width: 1500px) { .terrain-layout { grid-template-columns: 1fr; } }