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

body {
    font-family: 'Noto Sans JP', 'Noto Sans', sans-serif;
    background-color: #1a1a1a;
    color: #ffffff;
}

.container {
    display: flex;
    min-height: 100vh;
}

/* ナビゲーション */
.nav-menu {
    width: 200px;
    background-color: #000000;
    padding: 40px 0;
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
    transition: transform 0.3s ease;
}

/* モバイル用トグルは現在外部ボタンのみを使用 */
/* 内部モバイル-toggle要素は削除したためスタイル不要 */

/* ハンバーガーメニュー */
.menu-toggle {
    display: none;
    position: fixed;
    top: 20px;
    left: 20px;
    background: transparent;
    border: none;
    color: #ffffff;
    font-size: 24px;
    z-index: 1001;
    transition: left 0.3s ease;
}

/* スマホ向けスタイル */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .nav-menu {
        transform: translateX(-100%);
    }

    .nav-menu.open {
        transform: translateX(0);
    }

    /* when menu is open button stays on left */
    .menu-toggle.open {
        /* no position change needed, always left-aligned */
    }

    .content {
        margin-left: 0;
        padding-top: 60px;
        padding-left: 20px; /* ボタンとかぶらないよう余白 */
    }

    /* ページ見出しの左オフセット
       TOP文字がメニューボタンに被らないよう追加 */
    .page-content h1 {
        padding-left: 40px;
    }
}

/* center nav links */
.nav-menu a {
    text-align: center;
}

.nav-menu ul {
    list-style: none;
}

.nav-menu li {
    margin: 0;
}

.nav-menu a {
    display: block;
    padding: 15px 20px;
    color: #cccccc;
    text-decoration: none;
    font-size: 14px;
    font-weight: bold;
    letter-spacing: 2px;
    transition: all 0.3s ease;
    border-left: 4px solid transparent;
}

/* feature-item link styling – remove underline */
.top-features a {
    text-decoration: none;
    color: inherit;
}

.top-features a:hover {
    text-decoration: none;
}

.nav-menu a:hover {
    color: #ffffff;
    background-color: #333333;
}

/* アクティブナビゲーション */
.nav-menu a.active {
    background-color: #ffffff;
    color: #000000;
    border-left: 4px solid #000000;
}

/* コンテンツエリア */
.content {
    margin-left: 200px;
    flex: 1;
    padding: 40px;
    background-color: #1a1a1a;
}

.page-content {
    display: block;
}

.page-content.hidden {
    display: none;
}

.page-content h1 {
    font-size: 32px;
    margin-bottom: 30px;
    border-bottom: 3px solid #cccccc;
    padding-bottom: 15px;
}

/* TOPページ */
.top-section {
    margin-top: 20px;
}

.top-hero {
    text-align: center;
    padding: 60px 20px;
    background: url('https://pbs.twimg.com/profile_banners/1019839177561534465/1670336929/600x200') center/cover no-repeat;
    border: 2px solid #333333;
    margin-bottom: 40px;
    color: #ffffff;
}

.top-hero h2 {
    font-size: 48px;
    margin-bottom: 15px;
    color: #ffffff;
    letter-spacing: 3px;
}

.top-hero p {
    font-size: 16px;
    color: #cccccc;
    letter-spacing: 1px;
}

.top-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.feature-item {
    padding: 30px;
    background-color: #2a2a2a;
    border-left: 4px solid #cccccc;
    transition: all 0.3s ease;
}

.feature-item:hover {
    background-color: #333333;
    border-left-color: #ffffff;
    transform: translateY(-5px);
}

.feature-item h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #ffffff;
    letter-spacing: 2px;
}

.feature-item p {
    font-size: 14px;
    color: #999999;
    line-height: 1.6;
}

/* NEWSページ */
.news-item {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #333333;
}

.news-item h2 {
    font-size: 16px;
    color: #999999;
    margin-bottom: 10px;
}

.news-item p {
    font-size: 14px;
    line-height: 1.6;
    color: #cccccc;
}

/* ABOUTページ */
.about-section {
    margin-top: 20x;
}

.about-section h2 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #ffffff;
}

.about-icon {
    width: 33%;
    max-width: 150px;
    display: block;
    margin-bottom: 20px;
}

.about-section p {
    font-size: 14px;
    line-height: 1.8;
    color: #cccccc;
    margin-bottom: 15px;
}

/* DISCOGRAPHYページ */
.discography-section {
    margin-top: 20px;
}

.discography-section h2 {
    font-size: 20px;
    margin-bottom: 20px;
    color: #ffffff;
}

.album {
    margin-bottom: 25px;
    padding: 20px;
    background-color: #2a2a2a;
    border-left: 4px solid #cccccc;
}

.album h3 {
    font-size: 16px;
    margin-bottom: 8px;
    color: #ffffff;
}

.album p {
    font-size: 14px;
    color: #999999;
}

/* CONTACTページ */
.contact-section {
    margin-top: 20px;
}

.contact-section h2 {
    font-size: 20px;
    margin-bottom: 20px;
    color: #ffffff;
}

.contact-section p {
    font-size: 14px;
    color: #cccccc;
    margin-bottom: 20px;
}

form {
    margin-top: 20px;
}

label {
    display: block;
    margin-top: 15px;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: bold;
    color: #ffffff;
}

input[type="text"],
input[type="email"],
textarea {
    width: 100%;
    max-width: 500px;
    padding: 10px;
    background-color: #2a2a2a;
    border: 1px solid #444444;
    color: #ffffff;
    font-family: Arial, sans-serif;
    font-size: 14px;
}

input[type="text"]:focus,
input[type="email"]:focus,
textarea:focus {
    outline: none;
    border-color: #cccccc;
    background-color: #333333;
}

button[type="submit"] {
    margin-top: 20px;
    padding: 12px 40px;
    background-color: #ffffff;
    color: #000000;
    border: none;
    font-weight: bold;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 1px;
}

button[type="submit"]:hover {
    background-color: #cccccc;
    transform: scale(1.05);
}

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

    /* ハンバーガーボタンを表示 */
    #menu-toggle {
        display: block;
        position: fixed;
        top: 15px;
        left: 15px;
        z-index: 1100;
        background: none;
        border: none;
        color: #cccccc;
        font-size: 24px;
        cursor: pointer;
    }

    /* ナビメニューを画面外に隠す初期状態 */
    .nav-menu {
        width: 200px;
        position: fixed;
        top: 0;
        left: -220px; /* 隠す */
        height: 100vh;
        transition: left 0.3s ease;
        z-index: 1000;
    }

    /* 開いたとき */
    .nav-menu.open {
        left: 0;
    }

    .nav-menu .mobile-toggle {
        display: flex;
        justify-content: flex-end;
        padding: 10px 20px;
        background-color: #000;
    }

    .nav-menu .mobile-toggle .open-btn,
    .nav-menu .mobile-toggle .close-btn {
        font-size: 24px;
        color: #cccccc;
        cursor: pointer;
        display: none;
    }

    /* 初期はハンバーガー表示 */
    .nav-menu .mobile-toggle .open-btn {
        display: block;
    }

    .nav-menu.open .mobile-toggle .open-btn {
        display: none;
    }
    .nav-menu.open .mobile-toggle .close-btn {
        display: block;
    }

    .nav-menu ul {
        display: block;
        padding-top: 20px;
    }

    .nav-menu li {
        margin: 0;
    }

    .nav-menu a {
        padding: 15px 20px;
    }

    .content {
        margin-left: 0;
        padding: 20px;
    }
}