:root {
    --bg: #003452;
    --text: #ffffff;
    --accent: #5838a9;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Serif JP', sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.5;
}
a {
    text-decoration: none;
    color: inherit;
}
img {
    max-width: 100%;
    display: block;
}

p, li, .section-title, .sub-title {
    white-space: normal;
    overflow-wrap: break-word;
    word-wrap: break-word;
    word-break: break-word;
    hyphens: auto;
}

/*-----------------------------------
    ヘッダー
-----------------------------------*/
header {
    height: 100vh;
    position: relative;
    background: url('../img/classroom_top.png?v=0.1') no-repeat center center/cover;
    display: flex;
    justify-content: right;
    text-align: center;
    overflow: hidden;
    padding-top: 20vh;
    padding-right: 10%;
}
.hero-inner {
    max-width: 900px;
    text-align: left;
}
@media (max-width: 768px) {
    header {
    }
}

/*-----------------------------------
    アニメーション定義
-----------------------------------*/
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/*-----------------------------------
    TOPへ戻るボタン
-----------------------------------*/
.back-to-top {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 1000;
    background: linear-gradient(45deg, #57b3c7, #165b7f);
    color: #fff;
    padding: 12px 20px;
    font-size: 1.2rem;
    font-weight: bold;
    border-radius: 4px;
    text-decoration: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    transition: opacity 0.3s ease;
    display: none; /* 初期は非表示 */
    text-align: center;
}
.back-to-top:hover {
    opacity: 0.9;
}
/* モバイル（768px以下）用にサイズを縮小 */
@media (max-width: 768px) {
    .back-to-top {
        right: 10px;
        bottom: 10px;
        padding: 8px 14px;
        font-size: 1rem;
    }
}

/*-----------------------------------
    共通
-----------------------------------*/
.content {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
}
section {
    padding-top: 140px;
    padding-bottom: 60px;
}
.section-title {
    font-size: 2.0rem;
    margin-bottom: 40px;
    font-weight: 700;
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1.5s ease-out, transform 1.5s ease-out;
}
.section-title.fade-in {
    opacity: 1;
    transform: translateY(0);
}

.section-content {
    font-size: 1.1rem;
    line-height: 1.6;
    text-align: center;
    margin-top: 60px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1.5s ease-out, transform 1.5s ease-out;
}
.section-content.fade-in {
    opacity: 1;
    transform: translateY(0);
}
.ticket-button {
    display: inline-block;
    padding: 12px 30px;
    font-size: 1.6rem;
    font-weight: bold;
    color: #fff;
    text-decoration: none;
    background: linear-gradient(45deg, #57b3c7, #165b7f);
    border: none;
    border-radius: 10px;
    transition: background 0.3s ease;
    margin-top: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}
.ticket-button:hover {
    opacity: 0.9;
}

@media (max-width: 768px) {
    .section-title {
    }
    .section-content {
        font-size: 1rem;
    }
}

/*-----------------------------------
    情報
-----------------------------------*/
#infomation .section-content {
}
#infomation .info-date {
    font-size: 2.6rem;
}
#infomation .info-time {
    font-size: 1.8rem;
    margin-bottom: 24px;    
}
#infomation .info-place {
    font-size: 2.4rem;
}
#infomation .info-price {
    font-size: 1.6rem;
    margin-bottom: 32px;
}
@media (max-width: 768px) {
    #infomation .info-date {
        font-size: 2.0rem;
    }
    #infomation .info-time {
        font-size: 1.2rem;
    }
    #infomation .info-place {
        font-size: 1.8rem;
    }
    #infomation .info-price {
        font-size: 1.0rem;
    }
}

/*-----------------------------------
    アーティスト
-----------------------------------*/
#artist {

}
#artist .act-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    list-style: none;
    padding: 0 20px;
}
#artist .act-list .act-item {
    width: calc(33% - 11px);
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 34px;
}
#artist .act-list .act-item .act-image img {
    aspect-ratio: 4 / 3;
    object-fit: contain;
}
#artist .act-list .act-item .act-name {
    margin-top: 8px;
    font-size: 1.8rem;
}
#artist .act-list .act-item .act-sns {
    margin-top: 8px;
    width: 25%;
}
@media (max-width: 768px) {
    #artist .act-list .act-item {
        width: 100%;
    }
    #artist .act-list .act-item .act-name {
        font-size: 1.2rem;
    }
    #artist .act-list .act-item .act-sns {
        width: 20%;
    }
}

/*-----------------------------------
    メッセージ
-----------------------------------*/
#message {

}
#message .message-image img {
    margin: 0 auto;    
}
#message .message-sns {
    margin-top: 24px;
}
#message .message-sns .sns-icon {
    display: flex;
    align-items: center;
    justify-content: center;    
}
#message .message-sns .sns-icon img {
    width: 48px;
    margin-left: 24px;
}

/*-----------------------------------
    アクセス
-----------------------------------*/
#access {

}
#access .section-content {
    display: flex;
    flex-wrap: wrap;
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}
#access .access-map {
    flex: 1;
    min-width: 300px;
    height: 300px;
}
#access .access-map iframe {
    width: 100%;
    height: 100%;
}
#access .access-infomation {
    flex: 1;
    padding: 10px;
    box-sizing: border-box;
}
#access .access-infomation .access-address {
    font-size: 1.2em;
    margin-bottom: 20px;
}
#access .access-infomation .go-button {
    display: inline-block;
    padding: 10px 20px;
    background-color: #0078D4;
    color: white;
    text-decoration: none;
    border-radius: 6px;
}

/*-----------------------------------
    コード
-----------------------------------*/
#code .github-card {
    border: 1px solid #e1e4e8;
    border-radius: 6px;
    padding: 16px;
    max-width: 600px;
    background-color: #f9f9f9;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    margin: 20px auto;
    box-shadow: 0 1px 3px rgba(27,31,35,0.12);
}
#code .github-card-header {
    display: flex;
    align-items: center;
}
#code .avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    margin-right: 16px;
}
#code .repo-info {
    flex: 1;
}
#code .repo-name {
    font-size: 18px;
    font-weight: bold;
    color: #0366d6;
    text-decoration: none;
}
#code .repo-name:hover {
    text-decoration: underline;
}
#code .repo-description {
    margin: 4px 0 0;
    color: #586069;
    font-size: 14px;
}
#code .github-card-footer {
    display: flex;
    justify-content: space-between;
    margin-top: 16px;
    font-size: 14px;
    color: #586069;
}

/*-----------------------------------
    フッター
-----------------------------------*/
footer {
    text-align: center;
    padding: 30px 20px;
}
.footer-logo {
    display: block;
    margin: 80px auto 20px;
    max-width: 300px;
}
.copyright {
    font-size: 0.9rem;
    margin-bottom: 10px;
}
  
@media (max-width: 768px) {
    .footer-catch {
        font-size: 1.0rem;
    }
    
    .footer-logo {
        max-width: 200px;
    }
    .copyright {
        font-size: 0.7rem;
    }
}