:root {
  --bg: #0f1115;
  --panel: #181b22;
  --border: #2a2f3a;
  --text: #e6e8ee;
  --muted: #8a93a6;
  --accent: #4f8cff;
  --accent-fg: #fff;
  --danger: #ff6b6b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Hiragino Sans", "Yu Gothic", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
}

.app-header h1 { font-size: 18px; margin: 0; }

.env-status {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--panel);
  color: var(--muted);
}

.env-status.ok { color: #6ee7b7; }
.env-status.warn { color: #fbbf24; }
.env-status.err { color: var(--danger); }

.app-main {
  display: grid;
  grid-template-columns: minmax(320px, 480px) 1fr;
  gap: 16px;
  padding: 16px;
}

@media (max-width: 900px) {
  .app-main { grid-template-columns: 1fr; }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}

.panel h2 {
  font-size: 14px;
  margin: 0 0 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 10px;
}

.field > span {
  font-size: 12px;
  color: var(--muted);
}

.field input, .field textarea, .field select {
  background: #0c0e13;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  font: inherit;
}

.field input[type="color"] {
  padding: 2px 4px;
  height: 34px;
  cursor: pointer;
}

.field textarea { resize: vertical; }

.row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: 8px;
}

.field.small input { padding: 6px 8px; }

#ref-preview {
  max-width: 100%;
  max-height: 160px;
  margin-top: 6px;
  border-radius: 8px;
  display: none;
}

#ref-preview[src] { display: block; }

.actions {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

button {
  background: var(--accent);
  color: var(--accent-fg);
  border: none;
  border-radius: 8px;
  padding: 8px 14px;
  font: inherit;
  cursor: pointer;
}

button:disabled {
  background: #3a3f4b;
  color: var(--muted);
  cursor: not-allowed;
}

button.secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

progress {
  width: 100%;
  height: 8px;
}

#model-status, #gen-status {
  font-size: 13px;
  margin-bottom: 8px;
}

.muted { color: var(--muted); }

small.warn { color: #fbbf24; font-size: 11px; font-weight: normal; }

.preset-prompts {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 4px 0 10px;
}
.preset-label { font-size: 12px; color: var(--muted); }
button.preset {
  padding: 3px 10px;
  font-size: 12px;
  background: #252a36;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
}
button.preset:hover { background: #2e3546; border-color: var(--accent); }

#result {
  width: 100%;
  max-width: 512px;
  aspect-ratio: 1;
  background: #0c0e13;
  border: 1px dashed var(--border);
  border-radius: 8px;
  display: block;
}

.history {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 8px;
}

.history img {
  width: 100%;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid var(--border);
}

.app-footer {
  text-align: center;
  padding: 16px;
  color: var(--muted);
  border-top: 1px solid var(--border);
}