/* --- 変数設定 --- */
:root {
    --black: #000000;
    --white: #ffffff;
    --accent-pink: #ff00ff;
    --accent-blue: #00d4ff;
    --gray-dark: #111111;
    --gray-light: #f4f4f4;
    --line-green: #06C755;
    --flyer-green: #a2ff00;
}

/* --- リセット & 基本設定 --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Helvetica Neue', Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", sans-serif;
    background-color: var(--white);
    color: var(--black);
    line-height: 1.6;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* --- 固定ヘッダー（修正版） --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0; /* 0に修正し画面端まで固定 */
    width: 100%;
    height: 50px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    padding: 0;
}

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

.header-logo img {
    height: 24px;
    width: auto;
    display: block;
    margin: 0;
}

/* --- ヒーローセクション演出 --- */
.hero {
    position: relative;
    margin-top: 50px;
    padding: 40px 20px 30px;
    background-color: var(--black);
    text-align: center;
    min-height: 50vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.speed-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent 0%, rgba(0, 212, 255, 0.1) 50%, transparent 100%);
    background-size: 200% 100%;
    animation: speedMove 1.5s linear infinite;
}

@keyframes speedMove {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.scanlines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(255,255,255,0.03) 50%, transparent 50%);
    background-size: 100% 4px;
    pointer-events: none;
    z-index: 2;
}

.hero-container {
    position: relative;
    z-index: 5;
    width: 100%;
}

/* --- ロゴパネル中央寄せ（修正版） --- */
.logo-panel {
    display: block;
    margin: 0 auto 20px; /* margin: auto で確実に中央配置 */
    background: #fff;
    padding: 8px;
    box-shadow: 0 0 20px var(--accent-pink), 0 0 40px var(--accent-blue);
    clip-path: polygon(3% 0, 100% 0, 97% 100%, 0 100%);
}

.hero-logo {
    max-width: 380px;
    margin: 0 auto;
}

.hero-text {
    color: var(--white);
    font-size: 0.9rem;
    letter-spacing: 0.1em;
}

.hero-text p {
    margin-bottom: 8px;
    opacity: 0;
    transform: translateY(10px);
    animation: fadeInUp 0.8s forwards;
}

.hero-text .accent-glow {
    color: var(--accent-blue);
    font-weight: bold;
    text-shadow: 0 0 8px var(--accent-blue);
    font-size: 1.1rem;
    margin: 10px 0;
}

@keyframes fadeInUp {
    to { opacity: 1; transform: translateY(0); }
}

/* --- フライヤーセクション --- */
.flyer-section {
    background-color: var(--black);
    padding: 20px 10px 40px;
    text-align: center;
}

.flyer-container {
    max-width: 600px;
    margin: 0 auto;
    border: 2px solid var(--accent-blue);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
    line-height: 0;
}

.main-flyer {
    width: 100%;
    height: auto;
}

.flyer-caption {
    color: var(--white);
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    margin-top: 15px;
    font-weight: bold;
    text-shadow: 0 0 5px var(--accent-pink);
}

/* --- CTA エリア --- */
.cta-area {
    padding: 40px 20px;
    background: linear-gradient(to bottom, var(--black), #222);
}

.cta-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
    max-width: 400px;
    margin: 0 auto;
}

.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    text-decoration: none;
    font-weight: 900;
    border-radius: 4px;
    font-size: 1rem;
    transition: 0.3s;
    letter-spacing: 0.1em;
}

.btn-ticket {
    background-color: var(--black);
    color: var(--white);
    border: 2px solid var(--accent-pink);
    box-shadow: 4px 4px 0 var(--accent-blue);
}

.btn-ticket:active {
    transform: translate(2px, 2px);
    box-shadow: none;
}

.btn-line {
    background-color: var(--line-green);
    color: var(--white);
}

/* 新規追加：Instagramボタンのスタイリング */
.btn-instagram {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(220, 39, 67, 0.4);
}

.btn-instagram:active {
    transform: scale(0.98);
    box-shadow: none;
}

.homepage {
    display: flex;
    justify-content: center;
    margin-top: 20px;
}

.btn-hp {
    background-color: var(--black);
    color: var(--white);
    border: 1px solid rgba(255,255,255,0.3);
    width: 100%;
    max-width: 400px;
}

/* --- コンセプト --- */
.concept {
    padding: 80px 20px;
    text-align: center;
    background: var(--white);
}

.section-title {
    font-size: 1.4rem;
    line-height: 1.5;
    margin-bottom: 25px;
    font-weight: 800;
}

.text-accent {
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.concept-text {
    font-size: 0.9rem;
    color: #555;
}

/* --- アーティスト --- */
.lineup {
    padding: 60px 20px;
    background-color: var(--gray-light);
}

.lineup-title {
    font-size: 2.8rem;
    text-align: center;
    font-weight: 900;
    margin-bottom: 40px;
    font-style: italic;
    letter-spacing: -0.05em;
}

.artist-card {
    display: flex;
    gap: 15px;
    margin-bottom: 40px;
    align-items: flex-start;
}

.artist-image {
    flex: 0 0 40%;
}

.artist-image img {
    width: 100%;
    aspect-ratio: 1/1;
    object-fit: cover;
    border: 1px solid var(--black);
}

.artist-name {
    font-size: 1.2rem;
    font-weight: 900;
    margin-bottom: 5px;
    border-left: 4px solid var(--accent-pink);
    padding-left: 10px;
}

.artist-bio {
    font-size: 0.75rem;
    color: #444;
    text-align: justify;
}

/* --- イベント情報 & 地図 --- */
.info {
    padding: 60px 20px;
    background-color: var(--black);
    color: var(--white);
}

.info-title {
    text-align: center;
    margin-bottom: 30px;
    letter-spacing: 0.2em;
    font-weight: 900;
}

.info-list {
    max-width: 500px;
    margin: 0 auto;
}

.info-item {
    display: flex;
    flex-direction: column;
    border-bottom: 1px solid #333;
    padding: 20px 0;
}

.info-item dt {
    font-weight: bold;
    color: var(--accent-blue);
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.info-item dd {
    font-size: 0.9rem;
    font-weight: 500;
}

.venue-name {
    font-weight: bold;
    color: var(--white);
    font-size: 1.1rem;
}

.address-link {
    color: var(--accent-blue);
    text-decoration: underline;
    font-size: 0.85rem;
    display: inline-block;
    margin-bottom: 15px;
}

.map-wrapper {
    margin-top: 10px;
    width: 100%;
    border: 1px solid #333;
    line-height: 0;
    filter: grayscale(0.5) contrast(1.1);
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.2);
}

/* --- FAQセクション --- */
.faq {
    padding: 80px 20px;
    background-color: var(--gray-light);
}

.faq-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 40px;
    letter-spacing: 0.1em;
    font-style: italic;
    color: var(--black);
}

.faq-container {
    max-width: 700px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 25px;
    background: var(--white);
    padding: 25px;
    border-radius: 4px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    border-left: 6px solid var(--accent-blue);
}

.faq-item:nth-child(even) {
    border-left-color: var(--accent-pink);
}

.faq-question {
    font-weight: 900;
    font-size: 1.1rem;
    margin-bottom: 12px;
    color: var(--black);
    display: flex;
    gap: 10px;
}

.faq-question span {
    color: var(--accent-blue);
}

.faq-item:nth-child(even) .faq-question span {
    color: var(--accent-pink);
}

.faq-answer {
    font-size: 0.95rem;
    color: #444;
    line-height: 1.7;
    display: flex;
    gap: 10px;
    padding-left: 5px;
}

.faq-answer span {
    font-weight: bold;
    color: #888;
}

/* --- 最終CTA & フッター --- */
.final-cta {
    padding: 80px 20px;
    background-color: var(--white);
}

.footer {
    padding: 40px 20px;
    text-align: center;
    font-size: 0.7rem;
    color: #aaa;
    background: var(--gray-dark);
}

/* --- レスポンシブ（デスクトップ：3カラム対応） --- */
@media (min-width: 768px) {
    .artist-list {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 50px;
        max-width: 1000px;
        margin: 0 auto;
    }
    .hero-logo { max-width: 600px; }
    .cta-container { 
        flex-direction: row; 
        max-width: 900px; /* 3ボタン用に少し広げました */
    }
    .btn { flex: 1; }
    .info-item { flex-direction: row; }
    .info-item dt { width: 30%; }
    .info-item dd { width: 70%; }
}