:root {
  --bg: #f4f6f9;
  --card: #ffffff;
  --card-2: #f1f4f8;
  --text: #1f2937;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-2: #3b82f6;
  --ok: #059669;
  --err: #dc2626;
  --border: #d7dde5;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 40px 16px;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial,
    "PingFang SC", "Microsoft YaHei", sans-serif;
}

.card {
  width: 100%;
  max-width: 620px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 28px 32px;
  box-shadow: 0 6px 24px rgba(15, 23, 42, 0.08);
}

h1 { margin: 0 0 4px; font-size: 1.5rem; }
.subtitle { margin: 0 0 20px; color: var(--muted); }
code { background: var(--card-2); padding: 1px 5px; border-radius: 4px; font-size: 0.9em; }

.step { margin-bottom: 18px; display: flex; flex-direction: column; gap: 8px; }
.field-label { font-weight: 600; font-size: 0.9rem; }
.hint { margin: 2px 0 0; color: var(--muted); font-size: 0.82rem; }

select, input[type="text"], input[type="password"] {
  width: 100%;
  padding: 10px 12px;
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.95rem;
}

input:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

#credentials.disabled .field-label,
#credentials.disabled .hint {
  opacity: 0.55;
}

.dropzone {
  border: 2px dashed var(--border);
  border-radius: 10px;
  padding: 28px 16px;
  text-align: center;
  color: var(--muted);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.dropzone:hover, .dropzone:focus { border-color: var(--accent); outline: none; }
.dropzone.dragover { border-color: var(--accent); background: rgba(79, 156, 249, 0.08); }
.dropzone.has-file { border-style: solid; border-color: var(--ok); color: var(--text); }

.actions { flex-direction: row; gap: 12px; }
button {
  flex: 1;
  padding: 11px 16px;
  border: none;
  border-radius: 8px;
  background: var(--accent-2);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
}
button:hover:not(:disabled) { background: var(--accent); }
button:disabled { opacity: 0.45; cursor: not-allowed; }

.status {
  padding: 12px 14px;
  border-radius: 8px;
  background: var(--card-2);
  border: 1px solid var(--border);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 10px;
}
.status.ok { border-color: var(--ok); }
.status.err { border-color: var(--err); color: var(--err); }

.spinner {
  width: 14px; height: 14px;
  border: 2px solid var(--muted);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex: none;
}
@keyframes spin { to { transform: rotate(360deg); } }

.result { margin-top: 18px; }
.result-actions { display: flex; gap: 12px; margin-bottom: 12px; }
.link-btn {
  padding: 8px 14px;
  border: 1px solid var(--accent-2);
  border-radius: 8px;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.88rem;
}
.link-btn:hover { background: rgba(79, 156, 249, 0.1); }
.link-btn.primary {
  background: var(--accent-2);
  border-color: var(--accent-2);
  color: #fff;
}
.link-btn.primary:hover { background: var(--accent); border-color: var(--accent); }
.result-actions { flex-wrap: wrap; }
.footer {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  text-align: center;
}
.footer a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.85rem;
}
.footer a:hover { color: var(--accent); }

.preview {
  max-height: 340px;
  overflow: auto;
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  font-size: 0.8rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}