h1 {
    text-align: center;
}

table {
    margin-left: auto;
    margin-right: auto;
    width: 80%;
}

header {
    text-align: center;
    font-size: 32px;
}

th {
    background-color: rgb(255, 255, 255);
    text-align: center;
}
tr:nth-child(even) {
    background-color: rgb(221, 247, 245);
}
tr:nth-child(odd) {
    background-color:rgb(253, 252, 209)
}
tr {
    text-align: center;    
}

.top-nav-bar {
    height: 10px;
    display: block;
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 4;
}

.nav-tabs {
    margin-top: 20px;
    display: flex;
    gap: 10px;
    padding: 0 20px;
}

.nav-tab {
    padding: 10px 20px;
    background-color: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 5px;
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-tab:hover {
    background-color: #e9ecef;
    border-color: #cbd3da;
    color: #000;
}

.top-nav-bar {
    background-color: white;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.top-nav-bar header {
    font-size: 24px;
    font-weight: bold;
    color: #333;
}