body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #121212;
    color: #f5f5f5;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    flex-direction: column;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.footer {
    background-color: #f5f5f5;
    padding: 15px 0;
    text-align: center;
    border-top: 1px solid #e0e0e0;
    width: 100%;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.footer p {
    margin: 0;
    font-size: 14px;
    color: #666;
}

.footer-link {
    color: #333;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: #007bff;
    text-decoration: underline;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        gap: 10px;
    }
}

a {
    color: #1e88e5;
    text-decoration: none;
    transition: color 0.3s;
}

a:hover {
    color: #1565c0;
}

.navbar {
    width: 100%;
    background-color: #1e1e1e;
    box-shadow: 0 0.5vh 0.5vw rgba(0, 0, 0, 0.5);
    position: fixed;
    top: 0;
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1vh 0;
}

.header-icon {
    width: 5vw;
    height: auto;
    margin-right: 2vw;
}

.nav-list {
    list-style: none;
    display: flex;
    justify-content: center;
    padding: 0;
    margin: 0;
}

.nav-item {
    margin: 0 2vw;
}

.nav-button {
    background: none;
    border: none;
    color: #f5f5f5;
    font-size: 1.5vw;
    cursor: pointer;
    transition: color 0.3s;
}

.nav-button:hover {
    color: #1e88e5;
}

.container {
    max-width: 80vw;
    margin: 10vh auto 0;
    padding: 2vh 2vw;
    text-align: left; /* Set text alignment to left */
    background-color: rgba(255, 255, 255, 0.15);
    border-radius: 8px;
    box-shadow: 0 0.5vh 0.5vw rgba(0, 0, 0, 0.5);
    flex: 1;
}

h1, h2, h3, h4, h5 {
    color: #ffffff;
    text-align: center;
    margin: 2vh 0;
}

p {
    color: #e0e0e0;
    text-align: left; /* Set text alignment to left */
    margin: 1vh 0;
}

.flex {
    display: flex;
    justify-content: center;
    align-items: center;
}

.flex-col {
    flex-direction: column;
}

.gap-4 {
    gap: 1vw;
}

.gap-6 {
    gap: 1.5vw;
}

.gap-12 {
    gap: 3vw;
}

.pb-8 {
    padding-bottom: 2vh;
}

.mt-6 {
    margin-top: 1.5vh;
}

.mt-8 {
    margin-top: 2vh;
}

.text-center {
    text-align: center;
}

.font-bold {
    font-weight: bold;
}

.text-3xl {
    font-size: 2.5vw;
}

.sm\:text-5xl {
    font-size: 3.5vw;
}

.md\:text-6xl {
    font-size: 4vw;
}

.lg\:text-7xl {
    font-size: 5vw;
}

.btn, .btn-outline, .btn-icon {
    display: inline-block;
    padding: 1vh 2vw;
    margin: 1vh 1vw;
    text-decoration: none;
    border-radius: 0.5vw;
    transition: background-color 0.3s, transform 0.3s;
    box-shadow: 0 0.5vh 0.5vw rgba(0, 0, 0, 0.1);
    cursor: pointer;
}

.btn {
    background-color: #1e88e5;
    color: #fff;
}

.btn-outline {
    border: 0.2vw solid #1e88e5;
    color: #1e88e5;
    background-color: transparent;
}

.btn-icon img {
    vertical-align: middle;
    width: 2vw;
    height: 2vw;
}

.btn:hover, .btn-outline:hover {
    background-color: #1565c0;
    color: #fff;
    transform: translateY(-0.5vh);
}

.card {
    border: 0.1vw solid #333;
    border-radius: 0.5vw;
    overflow: hidden;
    box-shadow: 0 0.5vh 0.5vw rgba(0, 0, 0, 0.5);
    background-color: #1e1e1e;
    margin: 0 auto;
    width: 80%;
}

.card-header, .card-footer {
    padding: 1vh 2vw;
    background-color: #1e1e1e;
    text-align: center;
}

.card-content {
    padding: 1vh 2vw;
    background-color: #2e2e2e;
    text-align: center;
}

.grid {
    display: grid;
    justify-content: center;
    align-items: center;
    gap: 1.5vw;
    width: 100%;
}

.grid-cols-1 {
    grid-template-columns: repeat(1, minmax(0, 1fr));
}

.md\:grid-cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.lg\:grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.leading-normal {
    line-height: 1.5;
}

.sm\:text-xl {
    font-size: 1.5vw;
}

.sm\:leading-8 {
    line-height: 2rem;
}

.max-w-\[58rem\] {
    max-width: 58rem;
}

.max-w-\[42rem\] {
    max-width: 42rem;
}

.max-w-\[85\%\] {
    max-width: 85%;
}

.text-muted-foreground {
    color: #9e9e9e;
}

.bg-muted\/50 {
    background-color: rgba(158, 158, 158, 0.5);
}

.relative {
    position: relative;
}

.aspect-video {
    aspect-ratio: 16 / 9;
}

.overflow-hidden {
    overflow: hidden;
}

.object-cover {
    object-fit: cover;
}

.transition-all {
    transition: all 0.3s;
}

.hover\:scale-105:hover {
    transform: scale(1.05);
}