:root {
  --bg: #f5f6f8;
  --card: #fff;
  --text: #1f2328;
  --muted: #656d76;
  --border: #d0d7de;
  --primary: #2563eb;
  --primary-text: #fff;
  --warn-bg: #fff8e1;
  --warn-text: #7a5a00;
  --code-bg: #f6f8fa;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --card: #161b22;
    --text: #e6edf3;
    --muted: #8d96a0;
    --border: #30363d;
    --primary: #3b82f6;
    --warn-bg: #3a2f0b;
    --warn-text: #f2cc60;
    --code-bg: #0d1117;
  }
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.6 -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.header h1 {
  margin: 0;
  font-size: 22px;
}

.badge {
  padding: 2px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
}

.badge.ok {
  border-color: #2da44e;
  color: #2da44e;
}

.badge.error {
  border-color: #cf222e;
  color: #cf222e;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 16px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0 16px;
}

.field {
  display: block;
  margin-bottom: 14px;
}

.label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
}

input,
select,
textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--card);
  color: var(--text);
  font: inherit;
}

textarea {
  resize: vertical;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--primary);
  outline-offset: -1px;
}

.advanced,
.parse {
  margin-bottom: 14px;
}

summary {
  cursor: pointer;
  font-weight: 600;
  margin-bottom: 10px;
}

.checks {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-bottom: 14px;
}

.checks label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}

.checks input {
  width: auto;
}

.hint {
  margin: -6px 0 14px;
  color: var(--muted);
  font-size: 12px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

button,
.button {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--card);
  color: var(--text);
  font: inherit;
  cursor: pointer;
  text-decoration: none;
}

button:hover,
.button:hover {
  border-color: var(--primary);
}

button.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--primary-text);
}

button:disabled {
  opacity: 0.6;
  cursor: progress;
}

.row {
  display: flex;
  gap: 10px;
}

.parse summary {
  margin-bottom: 0;
}

.parse[open] summary {
  margin-bottom: 10px;
}

#preview {
  margin-top: 16px;
}

.meta {
  margin: 0 0 8px;
  color: var(--muted);
}

.warnings {
  margin: 0 0 8px;
  padding: 8px 12px 8px 28px;
  background: var(--warn-bg);
  color: var(--warn-text);
  border-radius: 6px;
}

.warnings:empty {
  display: none;
}

pre {
  max-height: 480px;
  overflow: auto;
  margin: 0;
  padding: 12px;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 12px;
  white-space: pre;
}

.footer {
  color: var(--muted);
  font-size: 12px;
}

code {
  padding: 1px 4px;
  background: var(--code-bg);
  border-radius: 4px;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  transform: translateX(-50%);
  padding: 8px 16px;
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  border-radius: 6px;
  z-index: 10;
}