:root {
  --bg: #ffffff;
  --text: #111111;
  --muted: #6b7280;
  --card: #f3f4f6;
  --line: #e5e7eb;
  --accent: #111111;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

a {
  color: inherit;
  text-decoration: none;
}

.auth-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.auth-card {
  width: 100%;
  max-width: 420px;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 24px;
  background: #fff;
}

.auth-card h1 {
  margin: 0 0 8px;
  font-size: 24px;
}

.auth-card p {
  margin: 0 0 16px;
  color: var(--muted);
}

label {
  display: block;
  font-size: 13px;
  margin-bottom: 6px;
}

input, select, button {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
}

button {
  background: var(--accent);
  color: #fff;
  border: none;
  cursor: pointer;
}

button:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.error {
  margin-top: 10px;
  color: #b91c1c;
  font-size: 13px;
}

.layout {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 250px 1fr;
}

.sidebar {
  border-right: 1px solid var(--line);
  padding: 20px 16px;
  background: #fff;
}

.brand {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 24px;
}

.nav a {
  display: block;
  padding: 10px 12px;
  border-radius: 8px;
  margin-bottom: 8px;
}

.nav a.active,
.nav a:hover {
  background: var(--card);
}

.main {
  padding: 20px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.admin-name {
  color: var(--muted);
  font-size: 14px;
}

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

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
}

.card .label {
  color: var(--muted);
  font-size: 12px;
}

.card .value {
  margin-top: 8px;
  font-size: 24px;
  font-weight: 700;
}

.filters {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
  margin-bottom: 12px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
}

.table-wrap {
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: auto;
  background: #fff;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}

th, td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  font-size: 13px;
}

th {
  background: #fafafa;
  color: #374151;
}

.pagination {
  margin-top: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.small-btn {
  width: auto;
  padding: 8px 12px;
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    border-right: none;
    border-bottom: 1px solid var(--line);
  }
}