* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: #f5f7fb;
  color: #1d2129;
}

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

.sidebar {
  width: 260px;
  background: #0f172a;
  color: #fff;
  padding: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}

.brand__logo {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, #165dff, #4080ff);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.brand h1,
.topbar h2,
.card h3,
.page-block h2,
.page-block h3,
.brand p,
.topbar p,
.card span,
.page-block p {
  margin: 0;
}

.brand h1 {
  font-size: 18px;
}

.brand p,
.topbar p,
.card span,
.page-block p {
  color: rgba(255, 255, 255, 0.72);
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.nav__item {
  padding: 12px 16px;
  border-radius: 12px;
  color: #cbd5e1;
  text-decoration: none;
  background: rgba(255, 255, 255, 0.04);
}

.nav__item--active {
  background: rgba(22, 93, 255, 0.24);
  color: #fff;
}

.main {
  flex: 1;
  padding: 32px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.topbar__meta {
  padding: 10px 16px;
  border-radius: 999px;
  background: #e8efff;
  color: #165dff;
}

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

.card,
.page-block {
  padding: 24px;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.08);
}

.card h3 {
  font-size: 16px;
  color: #4e5969;
  margin-bottom: 18px;
}

.card strong {
  display: block;
  font-size: 32px;
  color: #1d2129;
  margin-bottom: 10px;
}

.filter-form,
.stack-form {
  display: grid;
  gap: 12px;
}

.filter-form {
  grid-template-columns: 1fr auto auto;
  align-items: center;
}

.search-input,
.stack-form input {
  height: 42px;
  border: 1px solid #e5e6eb;
  border-radius: 12px;
  padding: 0 14px;
  outline: none;
}

.action-button,
.danger-button {
  height: 42px;
  border: 0;
  border-radius: 12px;
  padding: 0 16px;
  color: #fff;
  cursor: pointer;
}

.action-button {
  background: #165dff;
}

.danger-button {
  background: #f53f3f;
}

.action-link,
.text-link {
  color: #165dff;
  text-decoration: none;
}

.text-link.danger {
  color: #f53f3f;
}

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

.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th,
.data-table td {
  padding: 14px 12px;
  border-bottom: 1px solid #f0f2f5;
  text-align: left;
}

.page-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 20px;
}