body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    font-family: 'Helvetica Neue', 'Arial', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Meiryo', sans-serif;
    background-color: #f9f9f9;
}

.hero {
    position: relative;
    height: 100vh;
    overflow: hidden;
}

.background-stamps {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('/images/chao-lp05-backimg.jpg');
    background-size: cover;
    background-position: center;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #fff8fa;
    mask: url(#hole-mask);
    -webkit-mask: url(#hole-mask);
}

.content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    text-align: center;
    color: #333;
}

.title {
    margin: 0 0 15px;
    width: 100%;
    text-align: center;
}

.title img {
    width: 70%;
    max-width: 350px;
    height: auto;
}

.subtitle {
    font-size: 1.2rem;
    margin: 10px 0 30px;
}

.register-button {
    display: inline-block;
    padding: 15px 40px;
    background: linear-gradient(45deg, #ff69b4, #ff8c00);
    color: white;
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: bold;
    border-radius: 50px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    transition: transform 0.2s, box-shadow 0.2s;
}

.register-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

/* Announcements Section */
.announcements {
    padding: 25px 20px;
    background-color: #ffffff;
    border-bottom: 1px solid #eee;
    display: grid;
    grid-template-columns: 1fr; /* 1列のグリッドを作成 */
    gap: 15px; /* グリッドアイテム間のスペース */
    justify-items: center; /* アイテムを中央揃え */
}

.announcement-link {
    color: #333;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: bold;
    position: relative;
    padding-right: 20px; /* Space for arrow */
    display: inline-block;
    transition: color 0.2s;
    width: fit-content; /* コンテンツに合わせた幅 */
}

.announcement-link:hover {
    text-decoration: underline;
    color: #ff69b4;
}

.announcement-link::after {
    content: '';
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    border: 6px solid transparent;
    border-left-color: #ccc; /* Initial arrow color */
    transition: border-left-color 0.2s;
}

.announcement-link:hover::after {
    border-left-color: #ff69b4; /* Arrow color on hover */
}

/* Stamp Grid Section */
.stamp-grid-section {
    padding: 40px 10px;
    background-color: #f9f9f9;
}

.stamp-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    max-width: 800px;
    margin: 0 auto;
}

.stamp-grid a {
    display: block;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: transform 0.2s, box-shadow 0.2s;
}

.stamp-grid a:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

.stamp-grid img {
    width: 100%;
    height: auto;
    display: block;
}

.section-title {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: #333;
}

/* Pickup Section */
.pickup-section {
    padding: 40px 10px;
    background-color: #f9f9f9;
}

.pickup-section .register-button {
    padding: 0;
    background: none;
    box-shadow: none;
    border-radius: 8px;
}

/* Genre List Section */
.genre-list-section {
    padding: 20px 10px;
    background-color: #fff;
}

.genre-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    list-style: none;
    padding: 0;
    margin: 0;
}

.genre-list li {
    margin: 5px;
}

.genre-list a {
    display: block;
    padding: 8px 15px;
    background-color: #f0f0f0;
    color: #333;
    text-decoration: none;
    border-radius: 20px;
    font-size: 0.9rem;
    transition: background-color 0.2s, color 0.2s;
}

.genre-list a:hover {
    background-color: #ff69b4;
    color: #fff;
}

/* Full-width Menu */
.full-width-menu {
    display: flex;
    flex-direction: column;
    background-color: #fff;
    border-top: 1px solid #eee;
    border-bottom: 1px solid #eee;
}

.full-width-menu a {
    padding: 15px 20px;
    color: #333;
    text-decoration: none;
    border-bottom: 1px solid #f0f0f0;
    transition: background-color 0.2s;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.full-width-menu a:last-child {
    border-bottom: none;
}

.full-width-menu a:hover {
    background-color: #f9f9f9;
}


/* Footer Menu */
.user-menu {
    display: flex;
    justify-content: space-around;
    padding: 20px 0;
    background-color: #f0f0f0;
    border-top: 1px solid #ddd;
}

.user-menu a {
    color: #555;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.user-menu a:hover {
    color: #ff69b4;
}

/* Responsive */
@media (max-width: 768px) {
    .subtitle {
        font-size: 1rem;
    }
    .register-button {
        padding: 12px 30px;
        font-size: 1rem;
    }
    .user-menu {
        padding: 15px 0;
    }
    .user-menu a {
        font-size: 0.8rem;
    }
}