:root {
  --bg: #eef2f6;
  --sidebar: #1f2a35;
  --sidebar-border: #2d3a46;
  --sidebar-text: #d8e3ee;
  --sidebar-muted: #8ea2b5;
  --topbar: #4d8dbc;
  --topbar-dark: #3d7ca9;
  --panel: #ffffff;
  --border: #d8e0e8;
  --text: #1f2a35;
  --muted: #637485;
  --blue: #46a8e0;
  --green: #3faa59;
  --orange: #e4a114;
  --cyan: #34c0d6;
  --danger: #d35b5b;
  --shadow: 0 1px 2px rgba(0,0,0,0.08);
  --radius: 4px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.45;
}

a {
  color: #2b6f9b;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 260px;
  background: var(--sidebar);
  color: var(--sidebar-text);
  border-right: 1px solid var(--sidebar-border);
  flex-shrink: 0;
}

.sidebar-brand {
  padding: 20px 18px;
  border-bottom: 1px solid var(--sidebar-border);
}

.sidebar-brand-title {
  font-size: 24px;
  font-weight: 700;
}

.sidebar-brand-subtitle {
  margin-top: 4px;
  font-size: 14px;
  color: var(--sidebar-muted);
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  padding: 10px 0;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--sidebar-text);
  padding: 12px 18px;
  border-left: 3px solid transparent;
}

.nav-item:hover {
  background: rgba(255,255,255,0.04);
  text-decoration: none;
}

.nav-item.active {
  background: rgba(255,255,255,0.05);
  border-left-color: var(--blue);
}

.nav-item.disabled {
  opacity: 0.8;
  cursor: default;
}

.nav-item small {
  margin-left: auto;
  color: var(--sidebar-muted);
}

.nav-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}

.nav-dot-blue { background: var(--blue); }
.nav-dot-cyan { background: var(--cyan); }
.nav-dot-orange { background: var(--orange); }

.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.topbar {
  background: linear-gradient(180deg, var(--topbar), var(--topbar-dark));
  color: #fff;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  box-shadow: var(--shadow);
}

.topbar-title {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.topbar-link {
  color: #fff;
  font-size: 14px;
  font-weight: 600;
}

.content-shell {
  padding: 20px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--panel);
  border: 1px solid var(--border);
  display: grid;
  grid-template-columns: 78px 1fr;
  min-height: 128px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.stat-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  color: #fff;
  font-weight: 700;
}

.stat-card-body {
  padding: 14px 16px;
}

.stat-card-body h2 {
  margin: 0 0 10px 0;
  font-size: 20px;
}

.stat-row {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 6px;
  color: var(--muted);
}

.stat-row strong {
  color: var(--text);
}

.stat-card-blue .stat-card-icon { background: var(--blue); }
.stat-card-green .stat-card-icon { background: var(--green); }
.stat-card-orange .stat-card-icon { background: var(--orange); }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
  margin-bottom: 20px;
}

.panel-tight {
  padding: 0;
}

.panel-accent-blue {
  background: #59b9ea;
  color: #fff;
  border-color: #46a8e0;
}

.panel-accent-blue .section-title,
.panel-accent-blue .simple-list,
.panel-accent-blue .lead {
  color: #fff;
}

.page-title {
  margin: 0 0 12px 0;
  font-size: 32px;
  line-height: 1.2;
}

.section-title {
  margin: 0 0 10px 0;
  font-size: 24px;
}

.lead {
  margin: 0;
  font-size: 17px;
  color: var(--muted);
  max-width: 900px;
}

.simple-list {
  margin: 10px 0 0 18px;
}

.simple-list li {
  margin-bottom: 8px;
}

.cta-row {
  display: flex;
  gap: 10px;
  margin-top: 18px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 16px;
  border-radius: 4px;
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover {
  text-decoration: none;
  opacity: 0.96;
}

.btn-primary {
  background: #3f8fc1;
  color: #fff;
  border-color: #377ead;
}

.btn-secondary {
  background: #f3f6f9;
  color: var(--text);
  border-color: var(--border);
}

.btn-small {
  min-height: 34px;
  padding: 0 12px;
  font-size: 13px;
}

.filters-form {
  margin-top: 14px;
}

.filters-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr auto;
  gap: 14px;
  align-items: end;
}

.filters-grid-wide {
  grid-template-columns: 2fr 1fr 1fr 1fr auto;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field label {
  font-size: 14px;
  font-weight: 700;
}

.field input,
.field select {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 4px;
  padding: 0 12px;
  font-size: 14px;
}

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

.results-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.results-title {
  font-size: 22px;
  font-weight: 700;
}

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

.table-wrap {
  width: 100%;
  overflow-x: auto;
}

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

.docs-table thead th {
  text-align: left;
  background: #f5f8fb;
  padding: 14px 16px;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
}

.docs-table tbody td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.docs-table tbody tr:hover {
  background: #fbfdff;
}

.doc-title-link {
  font-weight: 700;
  font-size: 15px;
}

.doc-meta-line {
  margin-top: 6px;
}

.doc-filename {
  font-size: 12px;
  color: var(--muted);
  word-break: break-word;
}

.doc-description {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.action-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 99px;
  font-size: 12px;
  font-weight: 700;
}

.tag-muted {
  background: #eef2f6;
  color: var(--muted);
  border: 1px solid var(--border);
}

.tag-type {
  background: #eef7fc;
  color: #2b6f9b;
  border: 1px solid #c8dfef;
}

.empty-state {
  padding: 24px 20px;
  color: var(--muted);
}

.pagination {
  display: flex;
  gap: 8px;
  padding: 16px 20px 20px;
  flex-wrap: wrap;
}

.page-link {
  min-width: 38px;
  height: 38px;
  border: 1px solid var(--border);
  background: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  color: var(--text);
  text-decoration: none;
}

.page-link.active {
  background: #3f8fc1;
  border-color: #377ead;
  color: #fff;
}

.breadcrumbs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 14px;
  font-size: 14px;
  color: var(--muted);
}

.detail-meta-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin: 18px 0 20px;
}

.detail-meta-item {
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 12px 14px;
  background: #f9fbfd;
}

.meta-label {
  display: block;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}

.detail-description {
  padding: 16px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 4px;
  color: var(--text);
}

.footer {
  margin-top: auto;
  padding: 16px 20px;
  color: var(--muted);
  font-size: 13px;
  border-top: 1px solid var(--border);
}

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

@media (max-width: 1200px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .filters-grid {
    grid-template-columns: 1fr 1fr;
  }

  .filters-grid-wide {
    grid-template-columns: 1fr 1fr;
  }

  .detail-meta-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 900px) {
  .layout {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
  }

  .topbar {
    gap: 12px;
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 20px;
  }

  .topbar-title {
    font-size: 22px;
  }

  .filters-grid,
  .filters-grid-wide,
  .detail-meta-grid {
    grid-template-columns: 1fr;
  }
}