:root {
    --admin-primary: #2c3e50;
    --admin-secondary: #34495e;
    --admin-accent: #3498db;
    --admin-success: #27ae60;
    --admin-warning: #f1c40f;
    --admin-error: #e74c3c;
    --admin-gray: #95a5a6;
    --admin-light: #ecf0f1;
    --admin-accent-dark: #143b0c;
}

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

.admin-sidebar { background-color: var(--admin-primary); color: white; padding: 2rem; }
.admin-sidebar .logo { margin: 1rem 0 2rem; text-align: center; }
.admin-sidebar .logo img { max-width: 150px; height: auto; border-radius: 0.3rem; }
.admin-nav { margin-top: 2rem; }
.admin-nav ul { list-style: none; padding: 0; }
.admin-nav li { margin-bottom: 0.5rem; }
.admin-nav a { color: white; text-decoration: none; padding: 0.75rem 1rem; display: block; border-radius: 4px; transition: background-color 0.3s; }
.admin-nav a:hover, .admin-nav a.active { background-color: var(--admin-secondary); }
.admin-nav .icon { margin-right: 0.5rem; width: 20px; text-align: center; }

.admin-main { padding: 2rem; background-color: var(--admin-light); }

.admin-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; }
.admin-title { font-size: 1.5rem; color: var(--admin-primary); }

.admin-login { background-color: var(--admin-light); min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.login-container { width: 100%; max-width: 400px; padding: 2rem; }
.login-box { background-color: white; padding: 2rem; border-radius: 8px; box-shadow: 0 2px 4px rgba(0,0,0,0.1); }
.login-box h1 { margin-bottom: 2rem; text-align: center; color: var(--admin-primary); }

.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; margin-bottom: 0.5rem; color: var(--admin-secondary); }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 0.75rem; border: 1px solid var(--admin-gray); border-radius: 4px; font-size: 1rem; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--admin-accent); outline: none; box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2); }

.btn { display: inline-block; padding: 0.75rem 1.5rem; border: none; border-radius: 4px; font-size: 1rem; cursor: pointer; text-decoration: none; text-align: center; transition: all 0.3s; }
.btn-primary { background-color: var(--admin-accent); color: white; }
.btn-primary:hover { background-color: var(--admin-primary); }
.btn-warning { background-color: var(--admin-warning); color: var(--admin-primary); }
.btn-danger { background-color: var(--admin-error); color: white; }
.btn-link { background: none; color: var(--admin-accent); }
.btn-link:hover { text-decoration: underline; }

.admin-table { width: 100%; background-color: white; border-radius: 8px; overflow: hidden; box-shadow: 0 2px 4px rgba(0,0,0,0.1); }
.admin-table th, .admin-table td { padding: 1rem; text-align: left; border-bottom: 1px solid var(--admin-light); }
.admin-table th { background-color: var(--admin-secondary); color: white; font-weight: 500; }
.admin-table tr:hover { background-color: var(--admin-light); }
.admin-table .actions { display: flex; gap: 0.5rem; }

.admin-card { background-color: white; border-radius: 8px; padding: 1.5rem; box-shadow: 0 2px 4px rgba(0,0,0,0.1); margin-bottom: 1.5rem; }
.admin-card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }

.image-upload { border: 2px dashed var(--admin-gray); padding: 2rem; text-align: center; border-radius: 8px; cursor: pointer; transition: border-color 0.3s; }
.image-upload:hover { border-color: var(--admin-accent); }
.image-preview { max-width: 200px; margin-top: 1rem; }

.dashboard-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.5rem; margin-bottom: 2rem; }
.stat-card { display: flex; align-items: center; gap: 1.5rem; }
.stat-icon { font-size: 2rem; color: var(--admin-accent); width: 60px; height: 60px; display: flex; align-items: center; justify-content: center; background-color: rgba(52, 152, 219, 0.1); border-radius: 50%; }
.stat-number { font-size: 1.5rem; font-weight: bold; color: var(--admin-primary); margin: 0; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(400px, 1fr)); gap: 1.5rem; margin-bottom: 2rem; }
.chart-container { position: relative; height: 300px; margin-top: 1rem; }

.filters-form { display: flex; gap: 1rem; align-items: flex-end; margin-bottom: 1.5rem; flex-wrap: wrap; }
.filters-form .form-group { margin-bottom: 0; }

@media (max-width: 768px) {
    .admin-layout { grid-template-columns: 1fr; }
    .admin-sidebar { position: fixed; left: -250px; top: 0; bottom: 0; z-index: 1000; transition: left 0.3s; }
    .admin-sidebar.active { left: 0; }
    .admin-main { padding: 1rem; }
    .stats-grid { grid-template-columns: 1fr; }
}