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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background: linear-gradient(135deg, #1b8bb4 0%, #0f5f7a 100%);
    border-radius: 15px;
    color: white;
    box-shadow: 0 10px 30px rgba(27, 139, 180, 0.3);
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.header-top h1 {
    font-size: 2.2rem;
    font-weight: 300;
    margin: 0;
}

.btn-add {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    transition: all 0.3s ease;
}

.btn-add:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 25px rgba(34, 197, 94, 0.4);
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 25px;
}

/* Header Arama Bölümü */
.header-search {
    background: rgba(255, 255, 255, 0.1);
    padding: 15px;
    border-radius: 10px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.header-search .search-controls {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.header-search .search-row {
    display: grid;
    grid-template-columns: 2fr 1fr auto;
    gap: 12px;
    align-items: end;
}

.header-search .search-group input,
.header-search .search-group select {
    width: 100%;
    padding: 10px 12px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 6px;
    font-size: 0.95rem;
    background: rgba(255, 255, 255, 0.9);
    color: #333;
    transition: all 0.3s ease;
}

.header-search .search-group input:focus,
.header-search .search-group select:focus {
    outline: none;
    border-color: #22c55e;
    background: white;
    box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.2);
}

.header-search .btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: 8px 12px;
    font-size: 0.9rem;
    border-radius: 6px;
}

.header-search .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
}

/* Ana İçerik */
.main-content {
    display: grid;
    gap: 25px;
}

/* Form Bölümü */
.form-section {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    border-top: 4px solid #1b8bb4;
    animation: slideDown 0.4s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-section h2 {
    color: #1b8bb4;
    margin-bottom: 20px;
    font-size: 1.4rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 15px;
}

.form-row.three-columns {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 12px;
}

.form-row.single-row {
    grid-template-columns: repeat(7, 1fr);
    gap: 10px;
    margin-bottom: 20px;
    align-items: end;
}

.form-row.single-row .form-group {
    display: flex;
    flex-direction: column;
}

.form-row:last-child {
    margin-bottom: 0;
}

.form-row:last-child .form-group:first-child {
    grid-column: span 1;
}

.form-row:last-child .form-group:last-child {
    grid-column: span 1;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-weight: 600;
    margin-bottom: 6px;
    color: #555;
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 10px 12px;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    background: #fff;
    height: 45px;
    box-sizing: border-box;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #1b8bb4;
    box-shadow: 0 0 0 3px rgba(27, 139, 180, 0.1);
    background: #fff;
}

.form-group textarea {
    resize: vertical;
    min-height: 60px;
    font-family: inherit;
}

.form-row.single-row .form-group textarea {
    min-height: 45px;
    height: 45px;
    resize: none;
    grid-column: span 2;
}



.form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-start;
    margin-top: 25px;
    padding-top: 18px;
    border-top: 1px solid #e1e5e9;
}

/* Butonlar */
.btn-primary,
.btn-secondary,
.btn-success,
.btn-info,
.btn-danger {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.btn-primary {
    background: #1b8bb4;
    color: white;
}

.btn-primary:hover {
    background: #22c55e;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(34, 197, 94, 0.3);
}

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

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

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

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

.btn-info {
    background: #17a2b8;
    color: white;
}

.btn-info:hover {
    background: #138496;
}

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

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

/* İstatistikler */
.stats-section {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    border-top: 4px solid #1b8bb4;
}

.stats-section h2 {
    color: #1b8bb4;
    margin-bottom: 20px;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 15px;
}

.stat-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 18px;
    border-radius: 10px;
    text-align: center;
    border: 2px solid #e9ecef;
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    border-color: #1b8bb4;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: #1b8bb4;
    margin-bottom: 6px;
}

.stat-label {
    font-size: 0.9rem;
    color: #666;
    font-weight: 500;
}

/* Liste Bölümü */
.list-section {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    border-top: 4px solid #1b8bb4;
}

.list-section h2 {
    color: #1b8bb4;
    margin-bottom: 20px;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.list-controls {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.list-controls .btn-success,
.list-controls .btn-info {
    padding: 8px 16px;
    font-size: 0.9rem;
    border-radius: 6px;
}

/* Tablo */
.table-container {
    overflow-x: auto;
    border-radius: 8px;
    border: 1px solid #e1e5e9;
}

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

th, td {
    padding: 15px 12px;
    text-align: left;
    border-bottom: 1px solid #e1e5e9;
}

th {
    background: #f8f9fa;
    font-weight: 600;
    color: #495057;
    position: sticky;
    top: 0;
    z-index: 10;
}

/* Zebra deseni - çift satırlara farklı renk */
tbody tr:nth-child(even) {
    background-color: #f8f9fa;
}

tbody tr:nth-child(odd) {
    background-color: #ffffff;
}

tr:hover {
    background: #e3f2fd !important;
    transition: background-color 0.2s ease;
}

/* 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: 15px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    background: linear-gradient(135deg, #1b8bb4 0%, #0f5f7a 100%);
    color: white;
    padding: 20px 30px;
    border-radius: 15px 15px 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.3rem;
}

.close {
    color: white;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

.close:hover {
    color: #22c55e;
}

#editForm {
    padding: 30px;
}

.modal-actions {
    display: flex;
    gap: 15px;
    justify-content: flex-end;
    margin-top: 25px;
}

/* Responsive Tasarım */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    header {
        padding: 20px;
    }
    
    .header-top h1 {
        font-size: 1.8rem;
    }
    
    .btn-add {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
    
    .header-search .search-row {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .form-row.three-columns {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .form-row.single-row {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .form-row.single-row .form-group textarea {
        grid-column: span 1;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        height: 40px;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 8px 10px;
        font-size: 0.9rem;
    }
    
    .form-actions {
        margin-top: 20px;
        padding-top: 15px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .stat-card {
        padding: 15px;
    }
    
    .stat-number {
        font-size: 1.8rem;
    }
    
    .stat-label {
        font-size: 0.85rem;
    }
    
    .list-controls {
        flex-direction: column;
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
    
    #editForm {
        padding: 20px;
    }
    
    .modal-actions {
        flex-direction: column;
    }
    
    .form-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .header-top {
        flex-direction: column;
        gap: 15px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    
    .stat-card {
        padding: 12px;
    }
    
    .stat-number {
        font-size: 1.6rem;
    }
    
    .stat-label {
        font-size: 0.8rem;
    }
    
    th, td {
        padding: 10px 8px;
        font-size: 0.9rem;
    }
}

/* Özel Animasyonlar */
.form-section,
.stats-section,
.list-section {
    animation: fadeInUp 0.6s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Loading Spinner */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #1b8bb4;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Başarı ve Hata Mesajları */
.message {
    padding: 15px;
    border-radius: 8px;
    margin: 15px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.message.info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}