:root {
  --bg: #f8fafc;
  --panel: #ffffff;
  --line: #e5e7eb;
  --text: #111827;
  --muted: #6b7280;
  --soft: #f3f4f6;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --ok: #16a34a;
  --warn: #d97706;
  --error: #dc2626;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 13px;
}

.shell {
  min-height: 100svh;
  display: grid;
  grid-template-columns: 224px minmax(0, 1fr);
}

.sidebar {
  background: #fff;
  border-right: 1px solid var(--line);
  padding: 20px 14px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.brand {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 0 6px;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
}

.brand-name {
  font-weight: 700;
  font-size: 15px;
}

.brand-sub,
.page-header p,
.side-note,
label span,
.meta-grid span,
.meta-table span,
.rule-list span {
  color: var(--muted);
}

.brand-sub {
  font-size: 11px;
  margin-top: 2px;
}

.nav {
  display: grid;
  gap: 4px;
}

.nav-item {
  color: #374151;
  text-decoration: none;
  padding: 9px 10px;
  border-radius: 7px;
}

.nav-item.active,
.nav-item:hover {
  background: #eff6ff;
  color: var(--primary);
}

.side-note {
  margin-top: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  line-height: 1.55;
}

.side-label,
.section-title {
  font-size: 13px;
  color: #111827;
  font-weight: 700;
}

.main {
  padding: 28px;
  max-width: 1280px;
  width: 100%;
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

h1 {
  font-size: 20px;
  line-height: 1.25;
  margin: 0 0 6px;
}

p {
  margin: 0;
  line-height: 1.65;
}

.status-pill {
  border: 1px solid #bbf7d0;
  background: #f0fdf4;
  color: #166534;
  border-radius: 999px;
  padding: 6px 10px;
  white-space: nowrap;
}

.work-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 18px;
  align-items: start;
}

.work-grid.compact {
  grid-template-columns: minmax(0, 1fr) 340px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}

form {
  display: grid;
  gap: 14px;
}

label {
  display: grid;
  gap: 6px;
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid #d1d5db;
  border-radius: 7px;
  background: #fff;
  color: var(--text);
  padding: 9px 10px;
  font: inherit;
}

textarea {
  resize: vertical;
}

input:focus,
textarea:focus,
select:focus {
  outline: 2px solid #bfdbfe;
  border-color: var(--primary);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

button,
.secondary {
  min-height: 38px;
  border-radius: 7px;
  border: 1px solid transparent;
  font: inherit;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  padding: 0 14px;
}

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

.primary:hover {
  background: var(--primary-dark);
}

.primary:disabled {
  opacity: .45;
  cursor: not-allowed;
}

.secondary {
  background: #fff;
  border-color: var(--line);
  color: #374151;
}

pre {
  margin: 12px 0 16px;
  background: #0f172a;
  color: #e5e7eb;
  padding: 14px;
  border-radius: 8px;
  overflow: auto;
  font-size: 12px;
  line-height: 1.55;
}

.rule-list {
  display: grid;
  gap: 10px;
}

.rule-list div {
  display: grid;
  gap: 2px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
}

.alert {
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 14px;
}

.alert.error {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
}

.result-panel {
  display: grid;
  gap: 14px;
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.meta-grid div,
.meta-table div {
  border: 1px solid var(--line);
  background: #fafafa;
  border-radius: 7px;
  padding: 10px;
  display: grid;
  gap: 4px;
}

.meta-grid strong,
.meta-table strong {
  overflow-wrap: anywhere;
}

.copy-block input {
  background: #f9fafb;
}

.description {
  padding: 12px;
  background: #f9fafb;
  border: 1px solid var(--line);
  border-radius: 7px;
  margin: 10px 0 14px;
  white-space: pre-wrap;
}

.meta-table {
  display: grid;
  gap: 8px;
}

.error-page {
  max-width: 520px;
}

.error-page h1 {
  font-size: 44px;
  margin-top: 14px;
}

@media (max-width: 860px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .main {
    padding: 18px;
  }

  .work-grid,
  .work-grid.compact,
  .form-row,
  .meta-grid {
    grid-template-columns: 1fr;
  }

  .page-header {
    flex-direction: column;
  }
}