body {
    margin: 0;
    font-family: Arial;
}

/* Header */
.header {
    background: #333;
    color: white;
    text-align: center;
    padding: 15px;
}

/* Main layout */
.main {
    display: flex;
    min-height: 80vh;
}

/* Sidebar */
.sidebar {
    width: 200px;
    background: #555;
    padding-top: 20px;
}

.sidebar button {
    display: block;
    width: 100%;
    padding: 15px;
    border: none;
    background: none;
    color: white;
    text-align: left;
    cursor: pointer;
}

.sidebar button:hover {
    background: #777;
}

/* Content */
.content {
    flex: 1;
    padding: 20px;
    background: #f4f4f4;
}

/* Footer */
.footer {
    background: #222;
    color: white;
    text-align: center;
    padding: 15px;
}

/* Inputs */
input {
    padding: 8px;
    margin: 5px;
    width: 80px;
}

button.calc {
    margin-top: 10px;
    padding: 10px;
}

/* DARK MODE FULL PAGE */
.dark-mode {
    background-color: #121212;
    color: white;
}

/* Apply to layout parts */
.dark-mode .header {
    background: pink;
}

/* Buttons */
.dark-mode button {
    color: white;
    background-color: pink;
}

.content {
    background: darkgray;
}

.activity-image {
    width: 300px; /* Adjust this value as needed */
    height: auto;
    display: block; /* Optional: makes the image a block element, which can help with spacing */
    margin: 0 auto; /* Optional: centers the image if it's a block element */
}