body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 1em 0;
    position: relative;
}

footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 1em 0;
}

nav {
    background-color: #ddd;
    padding: 0.5em;
    text-align: center;
}

nav button {
    padding: 0.5em 1em;
    margin: 0 0.5em;
    border: none;
    background-color: #4CAF50;
    color: white;
    cursor: pointer;
    border-radius: 5px;
}

nav button:hover {
    background-color: #3e8e41;
}

main {
    padding: 1em;
    max-width: 960px; 
    margin: 0 auto; 
    padding-left: 20px; 
    padding-right: 20px; 
}

.page {
    display: none;
}

.page.active {
    display: block;
}

.button-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1em;
    margin-top: 1em;
}

.button-grid button {
    padding: 1em;
    border: none;
    background-color: #008CBA;
    color: white;
    cursor: pointer;
    border-radius: 5px;
    font-size: 1em;
}

.button-grid button:hover {
    background-color: #005f73;
}


.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.loading-spinner {
    border: 16px solid #f3f3f3; 
    border-top: 16px solid #3498db; 
    border-radius: 50%;
    width: 120px;
    height: 120px;
    animation: spin 2s linear infinite;
}

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

iframe {
    width: 100%;
    min-height: 500px; 
    border: none;
}

@media (max-width: 768px) {
  .button-grid {
    grid-template-columns: 1fr; 
  }

  iframe {
    min-height: 400px; 
  }

  main {
    padding-left: 10px; 
    padding-right: 10px;
  }
}

#home {
    display: block !important;
}

#mainNav {
    display: none;
}

.offcanvas {
    height: 100%;
    width: 0;
    position: fixed;
    z-index: 1;
    top: 0;
    left: 0;
    background-color: #111;
    overflow-x: hidden;
    transition: 0.5s;
    padding-top: 60px;
}

.offcanvas a {
    padding: 8px 8px 8px 32px;
    text-decoration: none;
    font-size: 25px;
    color: #818181;
    display: block;
    transition: 0.3s;
}

.offcanvas a:hover {
    color: #f1f1f1;
}

.offcanvas .closebtn {
    position: absolute;
    top: 0;
    right: 25px;
    font-size: 36px;
    margin-left: 50px;
}

.offcanvas button {
    padding: 8px 8px 8px 32px;
    border: none;
    background-color: transparent;
    color: #818181;
    display: block;
    transition: 0.3s;
    text-align: left;
    font-size: 20px;
    width: 100%;
}

.offcanvas button:hover {
    color: #f1f1f1;
    cursor: pointer;
}

.hamburger {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 2em;
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    padding: 5px;
}

@media screen and (max-height: 450px) {
  .offcanvas {padding-top: 15px;}
  .offcanvas a {font-size: 18px;}
}

.offcanvas button i {
    margin-right: 10px;
    width: 1em;
    display: inline-block;
    text-align: center;
}