:root {
    --sidebar-width: 250px;
    --primary-color: #0d6efd;
    --secondary-color: #6f42c1;
    --success-color: #28a745;
    --warning-color: #fd7e14;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: #f5f7fa;
    color: #4b5e6f;
    margin: 0;
    padding: 0;
}

.navbar {
    background-color: #ffffff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.navbar-brand, .nav-link {
    color: var(--primary-color) !important;
}

.nav-link:hover {
    color: #0056b3 !important;
}

.sidebar {
    width: var(--sidebar-width);
    background-color: #ffffff;
    height: 100vh;
    position: fixed;
    top: 56px;
    left: 0;
    padding: 20px;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.sidebar-header {
    padding-bottom: 20px;
    border-bottom: 1px solid #e9ecef;
}

.nav-link {
    color: #4b5e6f;
    padding: 10px 15px;
    transition: all 0.3s ease;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-color);
    background-color: #f8f9fa;
    border-radius: 5px;
}

.nav-link i {
    margin-right: 10px;
}

.content {
    margin-left: var(--sidebar-width);
    padding: 20px;
    min-height: calc(100vh - 56px);
}

.card {
    background-color: #ffffff;
    border: none;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

/* Fade-in animasyonu */
.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    0% { opacity: 0; transform: translateY(20px); }
    100% { opacity: 1; transform: translateY(0); }
}

/* Tablolar */
.table {
    background-color: #ffffff;
    color: #4b5e6f;
    border-radius: 10px;
    overflow: hidden;
}

.table thead th {
    background-color: #f8f9fa;
    color: #4b5e6f;
    border-bottom: 2px solid #e9ecef;
}

.table tbody tr {
    transition: background-color 0.3s ease;
}

.table tbody tr:hover {
    background-color: #f8f9fa;
}

.table tbody td {
    border-top: 1px solid #e9ecef;
}

.btn {
    border-radius: 5px;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}

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

.btn-success:hover {
    background-color: #218838;
    border-color: #218838;
}

.btn-warning {
    background-color: var(--warning-color);
    border-color: var(--warning-color);
}

.btn-warning:hover {
    background-color: #e06b0d;
    border-color: #e06b0d;
}

.btn-danger {
    background-color: #dc3545;
    border-color: #dc3545;
}

.btn-danger:hover {
    background-color: #c82333;
    border-color: #c82333;
}

.modal-content {
    background-color: #ffffff;
    color: #4b5e6f;
    border: none;
    border-radius: 10px;
}

.alert {
    border-radius: 5px;
}

/* Responsive Tasarım */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        top: 0;
    }

    .content {
        margin-left: 0;
    }

    .navbar-toggler {
        display: block !important;
    }
}

.logout-link {
    color: #dc3545 !important;
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.logout-link::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 2px;
    background-color: #dc3545;
    bottom: 0;
    left: -100%;
    transition: left 0.3s ease;
}

.logout-link:hover::after {
    left: 0;
}

.card {
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.card-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid #e9ecef;
}

.form-label {
    font-weight: 500;
    color: #4b5e6f;
}

.table th,
.table td {
    vertical-align: middle;
}

.btn-primary {
    background-color: #0d6efd;
    border-color: #0d6efd;
}

.btn-primary:hover {
    background-color: #0b5ed7;
    border-color: #0a58ca;
}

.btn-secondary {
    background-color: #6c757d;
    border-color: #6c757d;
}

.btn-secondary:hover {
    background-color: #5c636a;
    border-color: #565e64;
}