:root {
  --bg: #0f1419;
  --panel: #1a2332;
  --border: #2d3a4f;
  --text: #e8eef7;
  --muted: #8b9cb3;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --ok: #22c55e;
  --err: #ef4444;
  font-family: "Segoe UI", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 1.5rem;
  max-width: 1100px;
  margin-inline: auto;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

header h1 {
  margin: 0 0 0.25rem;
  font-size: 1.5rem;
  font-weight: 600;
}

.subtitle {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.panel h2 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.hint {
  margin: 0 0 1rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.hint code {
  background: var(--bg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  font-size: 0.8rem;
}

.config {
  margin-bottom: 1.5rem;
}

.grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 900px) {
  .grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.field {
  margin-bottom: 0.75rem;
}

.field label {
  display: block;
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.25rem;
}

input[type="text"],
input[type="password"],
input[type="file"],
select,
textarea {
  width: 100%;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
}

textarea {
  font-family: ui-monospace, monospace;
  font-size: 0.85rem;
  resize: vertical;
}

.row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.row label {
  font-size: 0.85rem;
  color: var(--muted);
}

.row select {
  width: auto;
  min-width: 6rem;
}

button {
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  font: inherit;
}

button:hover {
  border-color: var(--muted);
}

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

button.primary:hover {
  background: var(--accent-hover);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.status {
  margin: 0.5rem 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.status.ok {
  color: var(--ok);
}

.status.err {
  color: var(--err);
}

#log {
  margin: 0;
  padding: 0.75rem;
  background: var(--bg);
  border-radius: 6px;
  font-size: 0.8rem;
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 3rem;
  max-height: 12rem;
  overflow: auto;
}

.download {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.5rem 1rem;
  background: var(--ok);
  color: #fff;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 500;
}

.download.hidden {
  display: none;
}