/* ==========================================================================
   🧹 グローバルリセット（すべての要素のサイズ計算を「コミコミ」にしてはみ出し防止）
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
}

/* サイト全体のベース設定（ライブハウス風ダークモード） */
body {
    margin: 0;
    padding: 0;
    font-family: 'Helvetica Neue', Arial, sans-serif;
    background-color: #121212;
    color: #f5f5f5;
}

/* ヘッダーのデザイン（Flexboxで配置） */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #1f1f1f;
    padding: 15px 15px;
    border-bottom: 2px solid #ff0055;
}

.logo {
    font-size: 18px;
    font-weight: bold;
    letter-spacing: 1px;
    color: #ff0055;
}

/* 🔑 ログイン・ログアウトボタンのデザイン */
.auth-container {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: auto; /* ロゴの右側に寄せる */
    margin-right: 15px;
}

.auth-btn {
    background-color: #2c2c2c;
    color: #ffffff;
    border: 1px solid #ff0055;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    display: flex;
    align-items: center;
    gap: 5px;
}

.auth-btn:hover {
    background-color: #ff0055;
}

.auth-btn:active {
    transform: scale(0.95);
}

#userInfo {
    font-size: 12px;
    font-weight: bold;
    color: #00ffcc;
}


/* ==========================================================================
   ☰ ハンバーガーメニュー ＆ スライドメニューのデザイン
   ========================================================================== */
.menu-btn {
    background: none;
    border: none;
    color: #ffffff;
    font-size: 22px;
    cursor: pointer;
    transition: color 0.2s;
}

.menu-btn:hover {
    color: #ff0055;
}

/* スライドメニュー本体 */
.slide-menu {
    position: fixed;
    top: 0;
    right: -300px;
    width: 280px;
    height: 100vh;
    background-color: #1f1f1f;
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.5);
    z-index: 1000;
    padding: 30px 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    transition: right 0.3s ease-in-out;
}

.slide-menu.open {
    right: 0;
}

/* 閉じる「×」ボタン */
.close-btn {
    background: none;
    border: none;
    color: #888888;
    font-size: 24px;
    cursor: pointer;
    align-self: flex-end;
    transition: color 0.2s;
}

.close-btn:hover {
    color: #ff0055;
}

.slide-menu h3 {
    color: #ff0055;
    margin: 0;
    font-size: 18px;
    border-bottom: 2px solid #ff0055;
    padding-bottom: 10px;
}

/* メニュー内のチケットリンク */
.menu-nav {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.menu-nav a {
    color: #ffffff;
    text-decoration: none;
    font-weight: bold;
    background-color: #2c2c2c;
    padding: 12px 15px;
    border-radius: 5px;
    font-size: 16px;
    transition: background 0.2s;
}

.menu-nav a:hover {
    background-color: #ff0055;
}

/* メニューが開いている時の暗い背景カバー */
.menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 999;
    display: none;
}

.menu-overlay.open {
    display: block;
}


/* ==========================================================================
   🐦 Twitter風 タブ切り替えUI
   ========================================================================== */
.tab-container {
    display: flex;
    justify-content: center;
    border-bottom: 1px solid #333;
    margin-bottom: 25px;
    background-color: #1a1a1a;
}

.tab-btn {
    flex: 1;
    max-width: 200px;
    background: none;
    border: none;
    color: #888888;
    font-size: 16px;
    font-weight: bold;
    padding: 15px 0;
    cursor: pointer;
    text-align: center;
    position: relative;
    transition: color 0.3s;
}

.tab-btn:hover {
    color: #ffffff;
}

.tab-btn.active {
    color: #ff0055;
}

.tab-btn.active::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 20%;
    width: 60%;
    height: 3px;
    background-color: #ff0055;
    border-radius: 3px 3px 0 0;
}


/* ==========================================================================
   🔍 検索窓のデザイン
   ========================================================================== */
.search-container {
    text-align: center;
    margin-bottom: 40px;
    padding: 0 15px;
}

#searchInput {
    width: 100%;
    max-width: 400px;
    padding: 12px 20px;
    font-size: 16px;
    border: 2px solid #333;
    border-radius: 30px;
    background-color: #1e1e1e;
    color: #ffffff;
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
}

#searchInput:focus {
    border-color: #ff0055;
    box-shadow: 0 0 10px rgba(255, 0, 85, 0.5);
}


/* ==========================================================================
   🧱 CSS Gridによるカード配置
   ========================================================================== */
main {
    padding: 20px 15px 40px 15px;
    max-width: 1200px;
    margin: 0 auto;
}

h2 {
    text-align: center;
    font-size: 28px;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.band-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

/* バンド1組ごとのカードデザイン */
.band-card {
    background-color: #1e1e1e;
    border: 1px solid #333;
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    transition: transform 0.2s, border-color 0.2s;
}

.band-card:hover {
    transform: translateY(-5px);
    border-color: #ff0055;
}


/* ==========================================================================
   ⭐ お気に入りボタン ＆ 各SNSブランドカラー設定
   ========================================================================== */
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #333;
    padding-bottom: 10px;
    margin-bottom: 15px;
}

.band-card h3 {
    margin: 0;
    font-size: 18px;
    color: #00ffcc;
    border-bottom: none;
    padding-bottom: 0;
    text-align: left;
}

.sns-group {
    display: flex;
    gap: 12px;
    align-items: center;
}

/* 星ボタン */
.fav-btn {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    padding: 0;
    color: #888888;
    transition: color 0.2s, transform 0.2s;
}

.fav-btn.active {
    color: #ffcc00;
}

.fav-btn:hover {
    transform: scale(1.25);
}

/* YouTube & Apple Musicリンク */
.sns-link {
    text-decoration: none;
    font-size: 20px;
    transition: transform 0.2s, filter 0.2s;
}

.fa-youtube {
    color: #ff0000;
}

.fa-itunes-note {
    color: #ff2d55;
}

.sns-link:hover {
    transform: scale(1.25);
    filter: brightness(1.2);
}


/* ==========================================================================
   🔘 アクションボタンの設定
   ========================================================================== */
.btn-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 15px;
}

.btn {
    display: block;
    text-decoration: none;
    color: #fff;
    padding: 8px 12px;
    border-radius: 5px;
    font-size: 13px;
    font-weight: bold;
    transition: background 0.2s;
}

.btn-site { background-color: #444; }
.btn-site:hover { background-color: #555; }

.btn-pia { background-color: #005bac; }
.btn-pia:hover { background-color: #0073d6; }

.btn-eplus { background-color: #13a538; }
.btn-eplus:hover { background-color: #19c344; }