:root {
  --primary: #0d6efd;
  --primary-hover: #0b5ed7;
  --secondary: #6c757d;
  --success: #198754;
  --danger: #dc3545;
  --warning: #ffc107;
  --info: #0dcaf0;
  --dark: #212529;
  --light: #f8f9fa;
  --border-color: #dee2e6;
  --sidebar-bg: #1e293b;
  --sidebar-text: #cbd5e1;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: #f1f5f9;
  color: #334155;
  line-height: 1.5;
}

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

/* Sidebar */
.sidebar {
  width: 250px;
  background-color: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-header {
  padding: 1.25rem 1.5rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  border-bottom: 1px solid #334155;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sidebar-nav {
  list-style: none;
  padding: 1rem 0;
  flex-grow: 1;
}

.sidebar-nav li a {
  display: flex;
  align-items: center;
  padding: 0.75rem 1.5rem;
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: 0.95rem;
  transition: all 0.15s ease;
}

.sidebar-nav li a:hover,
.sidebar-nav li a.active {
  background-color: #334155;
  color: #ffffff;
  border-left: 4px solid var(--primary);
}

.sidebar-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid #334155;
  font-size: 0.85rem;
}

.sidebar-user {
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: #ffffff;
}

/* Main Content */
.main-content {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.top-navbar {
  background-color: #ffffff;
  border-bottom: 1px solid var(--border-color);
  padding: 0.85rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.page-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--dark);
}

.content-body {
  padding: 2rem;
  flex-grow: 1;
}

/* Alerts */
.alert {
  padding: 0.85rem 1.25rem;
  margin-bottom: 1.5rem;
  border-radius: 6px;
  font-size: 0.95rem;
}

.alert-success { background-color: #d1e7dd; color: #0f5132; border: 1px solid #badbcc; }
.alert-danger { background-color: #f8d7da; color: #842029; border: 1px solid #f5c2c7; }
.alert-warning { background-color: #fff3cd; color: #664d03; border: 1px solid #ffecb5; }
.alert-info { background-color: #cff4fc; color: #055160; border: 1px solid #b6effb; }

/* Cards & Stats */
.card {
  background-color: #ffffff;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  margin-bottom: 1.5rem;
  overflow: hidden;
}

.card-header {
  padding: 1rem 1.25rem;
  background-color: #f8fafc;
  border-bottom: 1px solid var(--border-color);
  font-weight: 600;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-body {
  padding: 1.25rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.stat-card {
  background-color: #ffffff;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  padding: 1.25rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.stat-card-title {
  font-size: 0.85rem;
  color: var(--secondary);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.stat-card-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--dark);
}

/* Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th, td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th {
  background-color: #f8fafc;
  color: #475569;
  font-weight: 600;
  white-space: nowrap;
}

tr:hover {
  background-color: #f8fafc;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.25em 0.6em;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 4px;
  text-transform: uppercase;
}

.badge-success { background-color: #d1e7dd; color: #0f5132; }
.badge-danger { background-color: #f8d7da; color: #842029; }
.badge-warning { background-color: #fff3cd; color: #664d03; }
.badge-info { background-color: #cff4fc; color: #055160; }
.badge-secondary { background-color: #e2e8f0; color: #475569; }

/* Buttons */
.btn {
  display: inline-block;
  font-weight: 500;
  text-align: center;
  padding: 0.45rem 0.9rem;
  font-size: 0.875rem;
  border-radius: 5px;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  transition: all 0.15s ease-in-out;
}

.btn-primary { background-color: var(--primary); color: #ffffff; }
.btn-primary:hover { background-color: var(--primary-hover); }
.btn-secondary { background-color: var(--secondary); color: #ffffff; }
.btn-danger { background-color: var(--danger); color: #ffffff; }
.btn-outline { background-color: transparent; border-color: var(--border-color); color: #475569; }
.btn-outline:hover { background-color: #f8fafc; }
.btn-sm { padding: 0.25rem 0.5rem; font-size: 0.775rem; }

/* Forms */
.form-group {
  margin-bottom: 1.25rem;
}

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: #334155;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="file"],
select,
textarea {
  width: 100%;
  padding: 0.5rem 0.75rem;
  font-size: 0.9rem;
  border: 1px solid var(--border-color);
  border-radius: 5px;
  background-color: #ffffff;
  color: #334155;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.15);
}

.form-text {
  font-size: 0.8rem;
  color: var(--secondary);
  margin-top: 0.25rem;
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1rem;
}

/* Login Page Specifics */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #e2e8f0;
}

.login-card {
  width: 100%;
  max-width: 420px;
  background-color: #ffffff;
  border-radius: 10px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.08);
  padding: 2.25rem;
}

.login-title {
  font-size: 1.45rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--dark);
  text-align: center;
}

.login-subtitle {
  font-size: 0.85rem;
  color: var(--secondary);
  text-align: center;
  margin-bottom: 1.5rem;
}