:root {
  --primary: #123c5d;
  --primary-dark: #092437;
  --secondary: #0ea5a3;
  --bg: #eef4f8;
  --white: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #dbe5ec;
  --danger: #dc2626;
  --success: #15803d;
  --warning: #b45309;
  --radius: 16px;
  --shadow: 0 14px 35px rgba(15, 23, 42, 0.09);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text);
}

a {
  text-decoration: none;
}

.admin-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: linear-gradient(180deg, var(--primary), var(--primary-dark));
  color: var(--white);
  padding: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 34px;
}

.brand-logo {
  width: 46px;
  height: 46px;
  background: var(--white);
  color: var(--primary);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
}

.brand h2 {
  font-size: 20px;
}

.brand p {
  font-size: 12px;
  opacity: 0.8;
}

.nav {
  display: grid;
  gap: 10px;
}

.nav a {
  color: rgba(255, 255, 255, 0.9);
  padding: 12px 14px;
  border-radius: 12px;
  font-size: 14px;
}

.nav a:hover,
.nav a.active {
  background: rgba(255, 255, 255, 0.14);
}

.main {
  padding: 24px;
}

.top-header {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 20px;
}

.top-header h1 {
  font-size: 24px;
  color: var(--primary);
  margin-bottom: 4px;
}

.top-header p {
  color: var(--muted);
  font-size: 14px;
}

.user-chip {
  background: #eef6f8;
  color: var(--primary);
  padding: 10px 14px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 13px;
  white-space: nowrap;
}

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

.card h2 {
  color: var(--primary);
  font-size: 20px;
  margin-bottom: 14px;
}

.card h3 {
  color: var(--primary);
  font-size: 16px;
  margin-bottom: 10px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.stat {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

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

.stat strong {
  display: block;
  margin-top: 6px;
  font-size: 34px;
  color: var(--primary);
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: var(--primary);
  color: var(--white);
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 13px;
  cursor: pointer;
  font-weight: 700;
}

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

.btn.secondary {
  background: #e2e8f0;
  color: var(--text);
}

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

.btn.success {
  background: var(--success);
}

.btn.small {
  padding: 7px 10px;
  font-size: 12px;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
}

th,
td {
  text-align: left;
  padding: 13px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  vertical-align: top;
}

th {
  color: var(--primary);
  background: #f8fafc;
  font-size: 13px;
}

td {
  color: #334155;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.form-group {
  margin-bottom: 14px;
}

.form-group.full {
  grid-column: 1 / -1;
}

label {
  display: block;
  font-size: 13px;
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 6px;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 11px 12px;
  font-size: 14px;
  outline: none;
  background: var(--white);
}

textarea {
  min-height: 120px;
  resize: vertical;
  font-family: Arial, Helvetica, sans-serif;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--secondary);
  box-shadow: 0 0 0 3px rgba(14, 165, 163, 0.12);
}

.help {
  color: var(--muted);
  font-size: 12px;
  margin-top: 5px;
  line-height: 1.45;
}

.alert {
  padding: 12px 14px;
  border-radius: 12px;
  margin-bottom: 14px;
  font-size: 14px;
}

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

.alert.success {
  background: #f0fdf4;
  color: #166534;
  border: 1px solid #bbf7d0;
}

.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
  background:
    radial-gradient(circle at top right, rgba(14, 165, 163, 0.18), transparent 30%),
    linear-gradient(135deg, #eaf1f5, #ffffff);
}

.login-card {
  width: 100%;
  max-width: 430px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.login-card .brand {
  color: var(--text);
  margin-bottom: 24px;
}

.login-card .brand-logo {
  background: var(--primary);
  color: var(--white);
}

.login-card h1 {
  color: var(--primary);
  font-size: 26px;
  margin-bottom: 6px;
}

.login-card p {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 18px;
}

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

  .sidebar {
    position: static;
  }

  .grid-3,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .top-header {
    flex-direction: column;
    align-items: flex-start;
  }
}