:root {
  --bg: #fafafa;
  --fg: #1f2328;
  --muted: #57606a;
  --accent: #0969da;
  --accent-hover: #0860c7;
  --border: #d0d7de;
  --error-bg: #ffebe9;
  --error-fg: #82071e;
  --status-fg: #1f2328;
  --code-bg: #f6f8fa;
  --code-fg: #1f2328;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background-color: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

h1 {
  margin: 0 0 0.5rem;
  font-size: 2rem;
  font-weight: 600;
}

h2 {
  margin: 0 0 0.75rem;
  font-size: 1.25rem;
  font-weight: 600;
}

.lede {
  margin: 0 0 2rem;
  color: var(--muted);
}

.upload-form {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  background-color: #ffffff;
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-bottom: 1rem;
}

.file-label {
  font-weight: 500;
}

input[type="file"] {
  font: inherit;
  flex: 1 1 240px;
  min-width: 0;
}

button {
  font: inherit;
  font-weight: 500;
  padding: 0.5rem 1rem;
  background-color: var(--accent);
  color: #ffffff;
  border: 1px solid var(--accent);
  border-radius: 6px;
  cursor: pointer;
}

button:hover:not(:disabled) {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.status {
  margin: 0.5rem 0 0;
  color: var(--status-fg);
  min-height: 1.25rem;
  font-size: 0.95rem;
}

.error {
  margin: 0.5rem 0 1rem;
  padding: 0.75rem 1rem;
  background-color: var(--error-bg);
  color: var(--error-fg);
  border: 1px solid #ffcecb;
  border-radius: 6px;
  font-size: 0.95rem;
  display: none;
  white-space: pre-wrap;
}

.error:not(:empty) {
  display: block;
}

.result {
  margin-top: 1.5rem;
}

.result[hidden] {
  display: none;
}

.rows-info {
  margin: 0 0 0.75rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.table-output {
  margin: 0;
  padding: 1rem;
  background-color: var(--code-bg);
  color: var(--code-fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
  font-size: 0.85rem;
  line-height: 1.4;
  overflow-x: auto;
  overflow-y: visible;
  white-space: pre;
  max-width: 100%;
}

@media (max-width: 600px) {
  .container {
    padding: 1.25rem 1rem 3rem;
  }

  h1 {
    font-size: 1.5rem;
  }

  .upload-form {
    flex-direction: column;
    align-items: stretch;
  }

  button {
    width: 100%;
  }
}