:root {
  --bg: #f3f5f7;
  --panel: #ffffff;
  --line: #d7dde4;
  --text: #213042;
  --muted: #637387;
  --primary: #1258dc;
  --danger: #b42318;
}

* {
  box-sizing: border-box;
}

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

.admin-shell {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}

.sidebar {
  padding: 24px 18px;
  border-right: 1px solid var(--line);
  background: #f9fbfd;
}

.sidebar h1 {
  margin-top: 0;
}

.sidebar nav {
  display: grid;
  gap: 8px;
  margin-bottom: 24px;
}

.sidebar a {
  color: var(--text);
  text-decoration: none;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid transparent;
}

.sidebar a:hover {
  background: #eef4ff;
  border-color: #c7d8ff;
}

.content {
  padding: 24px;
}

.page-head h2 {
  margin: 0;
}

.page-head p {
  color: var(--muted);
}

.panel {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  padding: 18px;
  margin-bottom: 18px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}

.stat-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  padding: 16px;
}

.stat-card span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.stat-card strong {
  display: block;
  margin-top: 8px;
  font-size: 28px;
}

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

.feed-form {
  border-top: 1px solid var(--line);
  padding-top: 16px;
  margin-top: 16px;
}

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

label span {
  font-size: 13px;
  color: var(--muted);
}

input,
select,
button {
  font: inherit;
}

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

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

.checkbox input {
  width: auto;
}

.primary-btn,
.danger-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 14px;
  border-radius: 10px;
  border: 0;
  cursor: pointer;
}

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

.danger-btn {
  background: #ffe5e1;
  color: var(--danger);
}

.row-actions {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

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

.table th,
.table td {
  border-bottom: 1px solid var(--line);
  padding: 10px 8px;
  text-align: left;
  vertical-align: top;
}

.table th {
  width: 220px;
  color: var(--muted);
  font-weight: 600;
}

.flash-stack {
  display: grid;
  gap: 10px;
  margin-bottom: 16px;
}

.flash {
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fff;
}

.flash-success {
  border-color: #b7e3c5;
  background: #ecfdf3;
}

.flash-error {
  border-color: #f3c3be;
  background: #fef3f2;
}

.simple-list {
  padding-left: 20px;
}

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

.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
}

.login-card {
  width: min(420px, 92vw);
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  padding: 24px;
}

@media (max-width: 900px) {
  .admin-shell {
    grid-template-columns: 1fr;
  }

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