:root {
    --primary-color: #007bff;
    --t-color: #28a745; /* Yeşil */
    --n-color: #ffc107; /* Sarı */
    --m-color: #dc3545; /* Kırmızı */
    --stage-color: #17a2b8; /* Mavi-yeşil */
    --light-gray: #f8f9fa;
    --dark-gray: #343a40;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    margin: 0;
    background-color: #eef2f5;
    color: var(--dark-gray);
}

header {
    background-color: var(--dark-gray);
    color: white;
    padding: 15px 30px;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.container {
    display: flex;
    max-width: 1400px;
    margin: 20px auto;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    overflow: hidden;
}

.sidebar {
    width: 240px;
    background-color: var(--light-gray);
    border-right: 1px solid #ddd;
    flex-shrink: 0;
}

.sidebar nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar nav .nav-link {
    display: block;
    padding: 15px 20px;
    color: #333;
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px solid #ddd;
    transition: all 0.3s ease;
}

.sidebar nav .nav-link:hover {
    background-color: #e9ecef;
}

.sidebar nav .nav-link.active {
    background-color: var(--primary-color);
    color: white;
    border-left: 5px solid #0056b3;
    padding-left: 15px;
}

.content {
    padding: 30px;
    width: 100%;
    overflow-y: auto;
}

.tnm-section {
    display: none;
    animation: fadeIn 0.5s;
}

.tnm-section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.info-box {
    background-color: #e9f7fd;
    border-left: 5px solid #17a2b8;
    padding: 15px;
    margin-top: 20px;
    border-radius: 5px;
}

/* Tablo Stilleri */
.table-container {
    margin-bottom: 30px;
}

.tnm-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 15px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.tnm-table th, .tnm-table td {
    border: 1px solid #dee2e6;
    padding: 12px 15px;
    text-align: left;
}

.tnm-table thead th {
    color: white;
    font-weight: bold;
}

.tnm-table tbody tr:nth-child(even) {
    background-color: var(--light-gray);
}

/* Renkli Başlıklar */
.t-table thead th { background-color: var(--t-color); }
.n-table thead th { background-color: var(--n-color); }
.m-table thead th { background-color: var(--m-color); }
.stage-table thead th { background-color: var(--stage-color); }