:root {
  --bg: #12141a;
  --panel: rgba(22, 24, 31, 0.9);
  --text: #e8eaef;
  --muted: #9aa3b2;
  --accent: #7eb6ff;
  --ok: #8fdfa0;
  --err: #ff8f8f;
  --line: rgba(255, 255, 255, 0.1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  overflow: hidden;
}

#canvas-wrap { position: fixed; inset: 0; }
canvas { display: block; width: 100%; height: 100%; }

#drop-overlay {
  position: fixed;
  inset: 0;
  z-index: 5;
  background: rgba(10, 14, 24, 0.72);
  display: grid;
  place-items: center;
  border: 2px dashed var(--accent);
}

.drop-card {
  padding: 18px 22px;
  border-radius: 14px;
  background: var(--panel);
  border: 1px solid var(--line);
  font-size: 16px;
}

.hud {
  position: fixed;
  z-index: 2;
  left: 12px;
  right: 12px;
  top: 12px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  pointer-events: none;
}

.hud > * { pointer-events: auto; }

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  backdrop-filter: blur(10px);
  border-radius: 12px;
  padding: 12px;
  max-width: min(460px, 100%);
}

.title { font-weight: 600; margin: 0 0 4px; }
.muted { color: var(--muted); margin: 0; font-size: 12px; }

.row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 10px;
  align-items: center;
}

.row.tight { margin-top: 8px; }

button, .file-btn, input[type="text"], input[type="password"] {
  appearance: none;
  border: 1px solid var(--line);
  background: #1c2030;
  color: var(--text);
  border-radius: 8px;
  padding: 8px 10px;
  font: inherit;
}

button, .file-btn { cursor: pointer; }
button:hover, .file-btn:hover { border-color: var(--accent); }
button:disabled { opacity: 0.45; cursor: default; }
button.ghost { background: transparent; }
.file-btn { display: inline-block; }
.file-btn input { display: none; }

#upload-key { flex: 1; min-width: 160px; }

#share-box {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

#share-url { flex: 1; min-width: 0; }

#my-models {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  max-height: 40vh;
  overflow-y: auto;
}

.model-row {
  display: flex;
  gap: 6px;
  align-items: center;
  margin-top: 6px;
}

.model-row button { padding: 5px 8px; font-size: 12px; }

.model-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 12px;
}

[hidden] { display: none !important; }

#status, #viewer-status {
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
  min-height: 1.2em;
  word-break: break-word;
}

.loading-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.loading-row #viewer-status { margin-top: 0; }
.loading-row { margin-top: 8px; }

.spinner {
  width: 14px;
  height: 14px;
  flex: none;
  border-radius: 50%;
  border: 2px solid var(--line);
  border-top-color: var(--accent);
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

#status.ok, #viewer-status.ok { color: var(--ok); }
#status.error, #viewer-status.error { color: var(--err); }

.hint {
  position: fixed;
  z-index: 2;
  left: 12px;
  bottom: 12px;
  right: 12px;
  max-width: 520px;
  color: var(--muted);
  font-size: 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 10px;
  pointer-events: none;
}

@media (max-width: 640px) {
  .hint { display: none; }
}