:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --card: #ffffff;
  --primary: #3b82f6;
  --primary-dark: #1d4ed8;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --success: #16a34a;
  --warning: #f59e0b;
  --danger: #ef4444;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text);
}

header {
  background: var(--card);
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

header h1 {
  font-size: 20px;
  margin: 0;
}

main {
  padding: 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.card {
  background: var(--card);
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  border: 1px solid var(--border);
  margin-bottom: 20px;
}

.grid {
  display: grid;
  gap: 16px;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

label {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
  display: block;
}

input,
textarea,
select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  font-size: 14px;
  background: #fff;
}

textarea {
  min-height: 96px;
  resize: vertical;
}

button {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
}

button.secondary {
  background: #e2e8f0;
  color: #1e293b;
}

button.danger {
  background: var(--danger);
}

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

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.table th,
.table td {
  border-bottom: 1px solid var(--border);
  padding: 8px;
  text-align: left;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  background: #e0f2fe;
  color: #0369a1;
}

.notice {
  padding: 10px 12px;
  border-radius: 8px;
  background: #f1f5f9;
  color: var(--muted);
  font-size: 13px;
}

.status {
  font-size: 13px;
  margin-top: 8px;
}

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

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

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

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.section-title h2 {
  margin: 0;
  font-size: 18px;
}

.qr-box {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-start;
}

.qr-box canvas,
.qr-box img {
  border: 1px solid var(--border);
  padding: 6px;
  border-radius: 8px;
  background: #fff;
}

.top-actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

.link-button {
  color: var(--primary-dark);
  text-decoration: none;
  font-size: 14px;
}

.login-wrapper {
  max-width: 420px;
  margin: 60px auto;
}

footer {
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  padding: 18px 0 40px;
}

.tag {
  display: inline-block;
  padding: 2px 8px;
  background: #eef2ff;
  color: #4338ca;
  border-radius: 8px;
  font-size: 12px;
}

.inline {
  display: inline-flex;
  gap: 8px;
  align-items: center;
}

.empty {
  color: var(--muted);
  font-size: 13px;
}

.markdown p {
  margin: 0 0 8px;
}

.markdown ul {
  margin: 0 0 8px 18px;
  padding: 0;
}