:root {
  --bg: #f5f7fa;
  --surface: #ffffff;
  --border: #d7dde6;
  --text: #1c2733;
  --muted: #66748a;
  --primary: #1769aa;
  --danger: #b42318;
  --ok: #177245;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 28px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.brand {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
}

nav {
  display: flex;
  gap: 18px;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
}

nav a:hover {
  color: var(--primary);
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 28px 20px 60px;
}

h1 {
  margin: 0 0 8px;
  font-size: 28px;
}

h2 {
  margin: 0 0 12px;
  font-size: 18px;
}

.muted {
  color: var(--muted);
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.card,
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.panel {
  margin-top: 22px;
}

.disabled {
  opacity: 0.6;
}

label {
  display: block;
  margin: 10px 0 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
}

input,
select,
textarea {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font: inherit;
  background: #fff;
}

textarea {
  font-family: Consolas, monospace;
  resize: vertical;
}

button {
  margin-top: 12px;
  padding: 9px 16px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

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

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

button.ghost {
  background: transparent;
}

.actions,
.form-grid {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
}

.form-grid .wide {
  grid-column: 1 / -1;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th,
td {
  padding: 10px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

th {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
}

.result {
  margin: 16px 0 0;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #0f1720;
  color: #d7e5f3;
  font-family: Consolas, monospace;
  font-size: 13px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.downloads {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.download-link {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid var(--primary);
  border-radius: 6px;
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
}

.download-link:hover {
  background: #e8f1f9;
}

.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}

.badge.ok {
  background: #e2f4ea;
  color: var(--ok);
}

.badge.warn {
  background: #fff2d9;
  color: #8a5a00;
}

.badge.error {
  background: #fde8e6;
  color: var(--danger);
}

.danger {
  color: var(--danger);
}