:root {
  --bg: #0f1115;
  --panel: #171a21;
  --ink: #e8e6e3;
  --muted: #9a958c;
  --line: #2a2e38;
  --accent: #d4a017;
  --danger: #d96b6b;
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--bg); color: var(--ink); }
button, input, select, textarea {
  font: inherit;
  color: inherit;
  background: #11141a;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.55rem 0.75rem;
}
button { cursor: pointer; background: var(--accent); color: #16130b; border-color: transparent; font-weight: 600; }
button.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
button:disabled { opacity: 0.45; cursor: not-allowed; }
.eyebrow { letter-spacing: 0.12em; text-transform: uppercase; font-size: 0.72rem; color: var(--muted); margin: 0; }
.hint, .sub, .status { color: var(--muted); font-size: 0.92rem; }
.error { color: var(--danger); }

.login-body { display: grid; place-items: center; min-height: 100vh; }
.login-card { width: min(420px, 92vw); background: var(--panel); padding: 2rem; border-radius: 16px; border: 1px solid var(--line); }
.login-card h1 { margin: 0.4rem 0 0.6rem; }
.login-card form { display: grid; gap: 0.9rem; margin-top: 1.2rem; }
.login-card label { display: grid; gap: 0.35rem; color: var(--muted); }

.top { display: flex; justify-content: space-between; align-items: center; padding: 1rem 1.25rem; border-bottom: 1px solid var(--line); }
.top h1 { margin: 0.15rem 0 0; font-size: 1.35rem; }
.top-right { display: flex; gap: 0.75rem; align-items: center; color: var(--muted); }
.layout { display: grid; grid-template-columns: 220px 1fr 220px; min-height: calc(100vh - 76px); }
.rail, .versions { background: var(--panel); border-right: 1px solid var(--line); padding: 1rem; }
.versions { border-right: 0; border-left: 1px solid var(--line); }
.rail ul, .versions ol { list-style: none; padding: 0; margin: 1rem 0 0; }
.rail li, .versions li { padding: 0.45rem 0.3rem; border-bottom: 1px solid var(--line); cursor: pointer; }
.rail li.active, .versions li.active { color: var(--accent); }
.stage { padding: 1rem 1.25rem 2rem; display: grid; gap: 0.8rem; align-content: start; }
.controls { display: flex; flex-wrap: wrap; gap: 0.8rem; align-items: end; }
.controls label { display: grid; gap: 0.3rem; color: var(--muted); font-size: 0.9rem; }
.actions { display: flex; flex-wrap: wrap; gap: 0.6rem; align-items: center; }
.inline { display: flex; gap: 0.4rem; align-items: center; color: var(--muted); }
textarea { width: 100%; resize: vertical; }
.canvas-wrap { position: relative; width: min(100%, 1024px); background: #0b0d12; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.canvas-wrap canvas { max-width: 100%; display: block; }
#mask-canvas { position: absolute; inset: 0; width: 100%; height: 100%; cursor: crosshair; }
#model-hint { margin: 0; flex: 1 1 220px; }

@media (max-width: 960px) {
  .layout { grid-template-columns: 1fr; }
  .rail, .versions { border: 0; border-bottom: 1px solid var(--line); }
}