* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  color: #1d2329;
  background: #eef2f6;
  font: 14px/1.5 Arial, "Microsoft YaHei", sans-serif;
}

main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 22px;
}

.topbar,
.brand,
.section-head,
nav,
.grid,
.checks,
.actions {
  display: flex;
  gap: 10px;
}

.topbar,
.section-head {
  align-items: center;
  justify-content: space-between;
}

.topbar {
  margin-bottom: 16px;
}

.brand {
  align-items: center;
}

.brand img {
  width: 116px;
  height: 34px;
}

.brand strong {
  display: block;
  font-size: 20px;
  letter-spacing: 0;
}

.brand span,
.section-head p,
.hint {
  margin: 0;
  color: #66727f;
}

.login-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 390px;
  min-height: calc(100vh - 44px);
  align-items: center;
  gap: 28px;
}

.login-brand {
  display: grid;
  align-content: center;
  gap: 14px;
  min-height: 520px;
  padding: 36px;
  border-radius: 10px;
  background:
    linear-gradient(135deg, rgba(191, 0, 0, 0.12), transparent 32%),
    linear-gradient(160deg, #151a20, #2b333c);
  color: #fff;
}

.login-brand img {
  width: 240px;
  height: auto;
}

.login-brand h1 {
  margin: 0;
  font-size: 42px;
  letter-spacing: 0;
}

.login-brand p {
  max-width: 460px;
  margin: 0;
  color: #d9e0e7;
  font-size: 16px;
}

.login-panel,
.panel,
.form-card {
  display: grid;
  gap: 14px;
  padding: 18px;
  border: 1px solid #dde3ea;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 12px 30px rgba(22, 31, 44, 0.08);
}

.login-panel {
  padding: 24px;
}

nav {
  margin-bottom: 14px;
}

.tab {
  flex: 1;
  background: #e8edf2;
  color: #1d2329;
}

.tab.active {
  background: #1d2329;
  color: #fff;
}

.panel,
.form-card {
  margin-bottom: 14px;
  box-shadow: none;
}

h1,
h2 {
  margin: 0;
}

h2 {
  font-size: 17px;
}

.grid {
  flex-wrap: wrap;
}

label {
  display: grid;
  flex: 1 1 220px;
  gap: 5px;
  color: #4f5b67;
}

input,
select,
textarea {
  width: 100%;
  min-height: 38px;
  padding: 8px 10px;
  border: 1px solid #cbd2da;
  border-radius: 6px;
  background: #fff;
  color: #1d2329;
  font: inherit;
}

textarea {
  resize: vertical;
}

button {
  min-height: 38px;
  padding: 0 14px;
  border: 0;
  border-radius: 6px;
  background: #bf0000;
  color: #fff;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  background: #a50000;
}

button:disabled {
  background: #aab3bd;
  cursor: not-allowed;
}

button.secondary {
  background: #e8edf2;
  color: #1d2329;
}

button.secondary:hover {
  background: #d9e0e7;
}

button.danger {
  background: #7f1d1d;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
}

th,
td {
  padding: 9px 8px;
  border-top: 1px solid #edf0f4;
  text-align: left;
  vertical-align: top;
}

th {
  color: #66727f;
  font-size: 12px;
}

pre {
  margin: 0;
  white-space: pre-wrap;
}

.log-detail {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  max-width: 620px;
}

.log-detail span {
  white-space: nowrap;
}

.log-detail b {
  color: #66727f;
  font-weight: 700;
}

.badge {
  display: inline-block;
  margin: 0 4px 4px 0;
  padding: 2px 6px;
  border-radius: 999px;
  background: #eef2f6;
  color: #1d2329;
  font-size: 12px;
}

#message {
  min-height: 20px;
  color: #0f6b41;
}

#message.error {
  color: #bf0000;
}

@media (max-width: 820px) {
  .login-shell {
    grid-template-columns: 1fr;
  }

  .login-brand {
    min-height: 260px;
  }
}