:root {
  --bg: #12151a;
  --panel: #1b1e24;
  --panel-2: #22262e;
  --border: #333945;
  --text: #e6e9ef;
  --muted: #9aa3b2;
  --accent: #4c9aff;
  --accent-hover: #6aadff;
  --danger: #ff6b6b;
  --ok: #55d187;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  font-family: system-ui, "Segoe UI", Roboto, "Noto Sans", sans-serif;
  background: var(--bg);
  color: var(--text);
}

body { display: flex; flex-direction: column; }

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.title { font-size: 17px; font-weight: 600; }

.tools { display: flex; align-items: center; gap: 12px; }

.lang { display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: 13px; }

select, input, textarea {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 7px 9px;
  font-size: 14px;
  font-family: inherit;
}
select:focus, input:focus, textarea:focus { outline: 1px solid var(--accent); }

button {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 14px;
  font-size: 14px;
  cursor: pointer;
}
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); color: #0d1117; border-color: var(--accent); font-weight: 600; }
button.primary:hover { background: var(--accent-hover); }
button.busy { opacity: .7; pointer-events: none; }
button.primary.busy,
button.primary:disabled {
  background: var(--panel-2);
  color: var(--muted);
  border-color: var(--border);
  cursor: default;
  opacity: 1;
}
button.ghost { background: transparent; display: inline-flex; align-items: center; justify-content: center; padding: 8px; }
button.ghost svg { display: block; }

main {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(280px, 380px) 1fr;
  gap: 12px;
  padding: 12px 16px;
  min-height: 0;
}

#prompt-panel {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 0;
}

#prompt {
  min-height: 140px;
  resize: vertical;
}

.actions { display: flex; }

.actions button { flex: 1; }

.status { font-size: 13px; min-height: 18px; color: var(--muted); }
.status.idle { color: var(--muted); }
.status.error { color: var(--danger); }

.attach { display: flex; gap: 8px; flex-wrap: wrap; }
.tag {
  text-decoration: none;
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 13px;
}
.tag:hover { border-color: var(--accent); }

details#log { margin-top: auto; }
details summary { cursor: pointer; color: var(--muted); font-size: 13px; }
#log-text {
  max-height: 220px;
  overflow: auto;
  background: #0d0f13;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px;
  font-size: 12px;
  white-space: pre-wrap;
  word-break: break-word;
}

#viewer-panel {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--panel);
  min-height: 400px;
}

#viewer { position: absolute; inset: 0; width: 100%; height: 100%; }

.dialog {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}
.dialog.hidden { display: none; }

.dialog-box {
  width: min(420px, 92vw);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.dialog-box h2 { margin: 0 0 4px; font-size: 16px; }

.dialog-box label { display: flex; flex-direction: column; gap: 5px; font-size: 13px; color: var(--muted); }

.dialog-box input, .dialog-box select { width: 100%; }

.hint { font-size: 12px; color: var(--ok); min-height: 15px; }
.hint.warn { color: var(--danger); }

.dialog-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 6px; }

@media (max-width: 800px) {
  main { grid-template-columns: 1fr; }
  #viewer-panel { min-height: 320px; }
}