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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f5f6fa;
    color: #2c3e50;
}

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

/* Sidebar */
.sidebar {
    width: 260px;
    background: linear-gradient(180deg, #2c3e50 0%, #34495e 100%);
    color: white;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    transition: all 0.3s;
    z-index: 1000;
}

.sidebar.collapsed {
    margin-left: -260px;
}

.sidebar-header {
    padding: 20px;
    background: rgba(0,0,0,0.2);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header h3 {
    font-size: 20px;
    font-weight: 600;
}

.sidebar-menu {
    list-style: none;
    padding: 10px 0;
}

.sidebar-menu li {
    margin: 2px 0;
}

.sidebar-menu li a {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: #ecf0f1;
    text-decoration: none;
    transition: all 0.3s;
}

.sidebar-menu li a:hover,
.sidebar-menu li a.active {
    background: rgba(255,255,255,0.1);
    border-left: 4px solid #3498db;
    padding-left: 16px;
}

.sidebar-menu li a i {
    margin-right: 10px;
    width: 20px;
}

.menu-section {
    padding: 15px 20px 5px;
    font-size: 11px;
    color: #95a5a6;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.sidebar-footer {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 15px;
    background: rgba(0,0,0,0.2);
    border-top: 1px solid rgba(255,255,255,0.1);
}

.user-info {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}

.user-info i {
    font-size: 35px;
    margin-right: 10px;
}

.user-info strong {
    display: block;
    font-size: 14px;
}

.user-info small {
    display: block;
    color: #95a5a6;
    font-size: 12px;
}

.btn-logout {
    display: block;
    width: 100%;
    padding: 8px;
    background: #e74c3c;
    color: white;
    text-align: center;
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.3s;
}

.btn-logout:hover {
    background: #c0392b;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    transition: all 0.3s;
}

.main-content.expanded {
    margin-left: 0;
}

.top-bar {
    background: white;
    padding: 15px 30px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar-left {
    display: flex;
    align-items: center;
}

.btn-menu-toggle {
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    margin-right: 15px;
    color: #2c3e50;
}

.page-title {
    font-size: 20px;
    font-weight: 600;
    color: #2c3e50;
}

.datetime {
    color: #7f8c8d;
    font-size: 14px;
}

.datetime i {
    margin-right: 5px;
}

.content-wrapper {
    padding: 30px;
}

/* Dashboard Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.stat-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.stat-card-title {
    font-size: 14px;
    color: #7f8c8d;
    text-transform: uppercase;
}

.stat-card-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.stat-card-value {
    font-size: 32px;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 5px;
}

.stat-card-desc {
    font-size: 13px;
    color: #95a5a6;
}

/* Renkli kartlar */
.stat-card.blue .stat-card-icon {
    background: #3498db22;
    color: #3498db;
}

.stat-card.green .stat-card-icon {
    background: #2ecc7122;
    color: #2ecc71;
}

.stat-card.orange .stat-card-icon {
    background: #f39c1222;
    color: #f39c12;
}

.stat-card.red .stat-card-icon {
    background: #e74c3c22;
    color: #e74c3c;
}

.stat-card.purple .stat-card-icon {
    background: #9b59b622;
    color: #9b59b6;
}

/* Tablo Stilleri */
.card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

.card-header {
    padding: 20px 25px;
    border-bottom: 1px solid #ecf0f1;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: #2c3e50;
}

.card-body {
    padding: 25px;
}

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

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

table thead {
    background: #f8f9fa;
}

table th {
    padding: 12px;
    text-align: left;
    font-weight: 600;
    color: #2c3e50;
    font-size: 14px;
    border-bottom: 2px solid #dee2e6;
}

table td {
    padding: 12px;
    border-bottom: 1px solid #ecf0f1;
    font-size: 14px;
}

table tbody tr:hover {
    background: #f8f9fa;
}

/* Butonlar */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s;
}

.btn-primary {
    background: #3498db;
    color: white;
}

.btn-primary:hover {
    background: #2980b9;
}

.btn-success {
    background: #2ecc71;
    color: white;
}

.btn-success:hover {
    background: #27ae60;
}

.btn-danger {
    background: #e74c3c;
    color: white;
}

.btn-danger:hover {
    background: #c0392b;
}

.btn-warning {
    background: #f39c12;
    color: white;
}

.btn-warning:hover {
    background: #e67e22;
}

.btn-info {
    background: #3498db;
    color: white;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

/* Form Stilleri */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: #2c3e50;
}

.form-control {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: #3498db;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

/* Badge */
.badge {
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background: #2ecc71;
    color: white;
}

.badge-danger {
    background: #e74c3c;
    color: white;
}

.badge-warning {
    background: #f39c12;
    color: white;
}

.badge-info {
    background: #3498db;
    color: white;
}

/* Alert */
.alert {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 5px;
    border-left: 4px solid;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border-color: #28a745;
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
    border-color: #dc3545;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border-color: #ffc107;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border-color: #17a2b8;
}

/* Login Sayfası */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-box {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 400px;
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h2 {
    color: #2c3e50;
    margin-bottom: 10px;
}

.login-header p {
    color: #7f8c8d;
    font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        margin-left: -260px;
    }
    
    .sidebar.show {
        margin-left: 0;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .content-wrapper {
        padding: 15px;
    }
}

/* Yükleme Animasyonu */
.loading {
    text-align: center;
    padding: 20px;
}

.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}