body {
    font-family: Arial, sans-serif;
    font-size: 14px;
    margin: 0;
    padding: 0;
    background-color: #121212;
    color: #e0e0e0;
}

h1 {
    text-align: center;
    padding: 20px;
    background-color: #1f1f1f;
    color: #ffffff;
    margin: 0;
    font-size: 24px;
}

.tabs {
    display: flex;
    justify-content: center;
    margin-top: 20px;
    border-bottom: 2px solid #333;
}

.tab {
    padding: 12px 24px;
    cursor: pointer;
    background-color: #333;
    color: #bbb;
    border: 1px solid #444;
    border-radius: 5px 5px 0 0;
    margin: 0 5px;
    transition: background-color 0.3s ease;
}

.tab:hover {
    background-color: #444;
}

.active {
    background-color: #4CAF50;
    color: white;
    font-weight: bold;
}

.tab-content {
    display: none;
    padding: 20px;
    background-color: #1f1f1f;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    margin: 0 20px;
    border-radius: 5px;
}

.tab-content.active {
    display: block;
}

.card-container {
    display: flex;
    flex-direction: column; /* 縦並び */
    gap: 20px;
}

.card {
    background-color: #282828;
    border-radius: 5px;
    padding: 20px;
    width: 100%; /* 幅を100%にして縦に並べる */
    box-sizing: border-box;
}

.card h3 {
    margin-top: 0;
    color: #ffffff;
}

@media (max-width: 768px) {
    .card {
        width: 100%; /* モバイルでも縦並び */
    }
}

.bar-outer {
    width: 100%;
    height: 24px;
    background-color: #333;
    border-radius: 12px;
    overflow: hidden;
    margin-top: 10px;
}

.bar-inner {
    height: 100%;
    background-color: #4CAF50;
    width: 0%;
    transition: width 0.5s ease;
}