:root {
  --bg: #f4f6f8;
  --card: #fff;
  --text: #14202b;
  --muted: #5a6b7a;
  --accent: #0d8f5b;
  --border: #d5dde5;
  font-family: "Segoe UI", system-ui, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); line-height: 1.5; }
a { color: var(--accent); }
.top {
  display: flex; justify-content: space-between; align-items: center;
  padding: 0.75rem 1rem; background: #fff; border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 20;
}
.logo { font-weight: 800; text-decoration: none; color: var(--text); }
.wrap { max-width: 960px; margin: 0 auto; padding: 1rem; }
h1 { font-size: 1.6rem; margin: 0.5rem 0; }
.lede { color: var(--muted); }
.panel {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 1rem; margin: 0.75rem 0;
}
.cloud-bar {
  display: flex; flex-wrap: wrap; gap: 0.4rem; align-items: center;
  padding: 0.5rem 0; font-size: 0.9rem;
}
.cloud-bar button {
  min-height: 40px; padding: 0.4rem 0.7rem; border-radius: 8px;
  border: 1px solid var(--border); background: #fff; cursor: pointer; font-weight: 600;
}
.cloud-bar button:hover { border-color: var(--accent); }
.cloud-bar .sep { color: var(--muted); }
.cloud-status { color: var(--muted); font-size: 0.85rem; margin-left: 0.25rem; }
label { display: block; margin: 0.5rem 0; font-weight: 600; }
input, select {
  width: 100%; max-width: 320px; min-height: 44px; margin-top: 0.25rem;
  padding: 0.5rem 0.65rem; border-radius: 8px; border: 1px solid var(--border);
}
.btn {
  display: inline-block; margin-top: 0.5rem; padding: 0.7rem 1rem; min-height: 44px;
  background: var(--accent); color: #fff; border: 0; border-radius: 8px; font-weight: 700; cursor: pointer;
}
.result {
  margin-top: 0.75rem; padding: 0.85rem; background: #e6f7ef; border-radius: 8px; font-weight: 700;
}
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 720px) { .grid2 { grid-template-columns: 1fr; } }
canvas.stage { width: 100%; max-width: 420px; background: #eee; border-radius: 8px; border: 1px solid var(--border); touch-action: none; }
#stl-host { width: 100%; height: 420px; background: #1a1a1a; border-radius: 12px; }
.tool-list { list-style: none; padding: 0; display: grid; gap: 0.5rem; }
.tool-list a {
  display: block; padding: 0.85rem 1rem; background: #fff; border: 1px solid var(--border);
  border-radius: 10px; text-decoration: none; color: var(--text); font-weight: 650;
}
.muted { color: var(--muted); font-size: 0.9rem; }