/* Reset ve Temel Stiller */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.header h1 {
    font-size: 2rem;
    font-weight: 300;
}

.nav {
    background: white;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.nav ul {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.nav a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.nav a:hover, .nav a.active {
    background: #667eea;
    color: white;
}

/* Ana İçerik */
.main-content {
    padding: 2rem 0;
    min-height: calc(100vh - 200px);
}

/* Kartlar */
.card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.card-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1.5rem;
    font-size: 1.2rem;
    font-weight: 500;
}

.card-body {
    padding: 1.5rem;
}

/* Butonlar */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: #667eea;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    margin: 0.25rem;
}

.btn:hover {
    background: #5a6fd8;
    transform: translateY(-2px);
}

.btn-success {
    background: #28a745;
}

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

.btn-danger {
    background: #dc3545;
}

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

.btn-warning {
    background: #ffc107;
    color: #333;
}

.btn-warning:hover {
    background: #e0a800;
}

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

.btn-secondary:hover {
    background: #5a6268;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
}

/* Formlar */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #555;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e9ecef;
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-row {
    display: flex;
    gap: 1rem;
}

.form-row .form-group {
    flex: 1;
}

/* Tablolar */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.table th,
.table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #e9ecef;
}

.table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #555;
}

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

/* Grid Sistemi */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: -0.5rem;
}

.col {
    flex: 1;
    padding: 0.5rem;
}

.col-2 {
    flex: 0 0 16.666667%;
}

.col-3 {
    flex: 0 0 25%;
}

.col-4 {
    flex: 0 0 33.333333%;
}

.col-6 {
    flex: 0 0 50%;
}

.col-8 {
    flex: 0 0 66.666667%;
}

.col-12 {
    flex: 0 0 100%;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 0;
    border-radius: 10px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.modal-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1.5rem;
    border-radius: 10px 10px 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid #e9ecef;
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

.close {
    color: white;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover {
    opacity: 0.7;
}

/* Firma Kartları */
.firma-card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    margin-bottom: 1rem;
    overflow: hidden;
    transition: all 0.3s ease;
    cursor: pointer;
}

.firma-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.firma-card-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem;
}

.firma-card-body {
    padding: 1rem;
}

.firma-card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

.firma-card p {
    margin-bottom: 0.5rem;
    color: #666;
}

/* İstatistikler */
.stats {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    flex: 1;
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: bold;
    color: #667eea;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: #666;
    font-size: 0.9rem;
}

/* Uyarılar */
.alert {
    padding: 1rem;
    border-radius: 5px;
    margin-bottom: 1rem;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

/* Responsive Tasarım */
@media (max-width: 768px) {
    .container {
        padding: 0 10px;
    }
    
    .nav ul {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .form-row {
        flex-direction: column;
    }
    
    .stats {
        flex-direction: column;
    }
    
    .row {
        flex-direction: column;
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
    
    .table {
        font-size: 0.8rem;
    }
    
    .table th,
    .table td {
        padding: 0.5rem;
    }
}

/* Animasyonlar */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease;
}

/* Yardımcı Sınıflar */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mb-0 {
    margin-bottom: 0;
}

.mb-1 {
    margin-bottom: 0.5rem;
}

.mb-2 {
    margin-bottom: 1rem;
}

.mb-3 {
    margin-bottom: 1.5rem;
}

.mt-0 {
    margin-top: 0;
}

.mt-1 {
    margin-top: 0.5rem;
}

.mt-2 {
    margin-top: 1rem;
}

.mt-3 {
    margin-top: 1.5rem;
}

.d-none {
    display: none;
}

.d-block {
    display: block;
}

.d-flex {
    display: flex;
}

.justify-content-between {
    justify-content: space-between;
}

.align-items-center {
    align-items: center;
}

/* Badge Stilleri */
.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: 0.25rem;
}

.badge-success {
    color: #fff;
    background-color: #28a745;
}

.badge-warning {
    color: #212529;
    background-color: #ffc107;
}

.badge-secondary {
    color: #fff;
    background-color: #6c757d;
}

.badge-danger {
    color: #fff;
    background-color: #dc3545;
}

/* Footer */
.footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 1rem 0;
    margin-top: 2rem;
}