/*
Theme Name: 音MABUSHIテーマ
Author: Ohtoro Technology
Description: 音MABUSHIフェス公式サイトテーマ
Version: 4.0
*/

/* ===========================
   CSS変数 — ポスター準拠カラー
=========================== */
:root {
    --pink: #E91E8B;
    --pink-light: #FF5CB8;
    --pink-pale: #FFD6EC;
    --cyan: #00BCD4;
    --cyan-light: #4DD9E8;
    --cyan-pale: #D0F4F8;
    --purple: #7B2FBE;
    --purple-light: #A85FE0;
    --yellow: #FFE135;
    --yellow-light: #FFF176;
    --orange: #FF8C42;
    --bg-main: #E8F6FC;
    --bg-section-alt: #FFF0F7;
    --bg-white: #ffffff;
    --text: #2a2a3a;
    --text-muted: #6b6b80;
    --text-light: rgba(255,255,255,0.85);
    --border-radius: 12px;
    --border-radius-lg: 20px;
    --gradient-main: linear-gradient(135deg, #FF5CB8 0%, #00BCD4 50%, #7B2FBE 100%);
    --gradient-pink-cyan: linear-gradient(135deg, #E91E8B, #00BCD4);
    --gradient-hero: linear-gradient(180deg, #87CEEB 0%, #FFB6D9 40%, #FF8EC8 70%, #E91E8B 100%);
}

/* ===========================
   リセット & 基本
=========================== */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
    font-family: 'Zen Maru Gothic', 'Noto Sans JP', 'Inter', sans-serif;
    color: var(--text);
    background: var(--bg-main);
    line-height: 1.8;
    overflow-x: hidden;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

/* iOS Safari では background-attachment: fixed が効かないので
   固定背景は疑似要素 + position: fixed で実装 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    background-image: url('assets/bg.webp');
    background-position: center center;
    background-size: cover;
    background-repeat: no-repeat;
    pointer-events: none;
}

/* ===========================
   半透明セクション（背景画像を透かして見せる）
=========================== */
:root {
    --bg-white-alpha: rgba(255, 255, 255, 1);
    --bg-section-alt-alpha: rgba(255, 240, 247, 0.85);
    --bg-main-alpha: rgba(232, 246, 252, 0.85);
}
a { text-decoration: none; color: inherit; transition: 0.3s; }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }

/* ===========================
   共通
=========================== */
.container { max-width: 960px; margin: 0 auto; padding: 0 24px; }
.section-padding { padding: 70px 0; }

.section-title {
    font-size: 1.8rem;
    font-weight: 900;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    background: var(--gradient-pink-cyan);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

/* 装飾キラキラ */
.sparkle {
    position: relative;
}
.sparkle::before,
.sparkle::after {
    content: '✦';
    position: absolute;
    font-size: 0.6em;
    color: var(--yellow);
    -webkit-text-fill-color: var(--yellow);
}
.sparkle::before { top: -4px; left: -16px; }
.sparkle::after { top: -4px; right: -16px; }

/* ===========================
   ボタン共通
=========================== */
.btn-primary {
    display: inline-block;
    background: var(--gradient-pink-cyan);
    color: #fff;
    font-weight: 900;
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    padding: 14px 44px;
    border-radius: 50px;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 15px rgba(233,30,139,0.3);
}
.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(233,30,139,0.4);
    color: #fff;
}

.btn-outline {
    display: inline-block;
    border: 2px solid var(--pink);
    color: var(--pink);
    font-weight: 900;
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    padding: 12px 40px;
    border-radius: 50px;
    transition: all 0.2s;
}
.btn-outline:hover {
    background: var(--pink);
    color: #fff;
}

/* 旧ボタンクラス互換 */
.btn-gold {
    display: inline-block;
    background: var(--gradient-pink-cyan);
    color: #fff;
    font-weight: 900;
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    padding: 12px 40px;
    border-radius: 50px;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 15px rgba(233,30,139,0.3);
}
.btn-gold:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(233,30,139,0.4);
    color: #fff;
}

.btn-gold-outline {
    display: inline-block;
    background: var(--pink);
    border: 2px solid var(--pink);
    color: #fff;
    font-weight: 900;
    font-size: 0.9rem;
    letter-spacing: 0.15em;
    padding: 14px 48px;
    border-radius: 50px;
    transition: all 0.2s;
    box-shadow: 0 4px 15px rgba(233,30,139,0.3);
}
@media (hover: hover) {
    .btn-gold-outline:hover {
        background: var(--pink-light);
        border-color: var(--pink-light);
        color: #fff;
        box-shadow: 0 6px 20px rgba(255,92,184,0.45);
    }
}
.btn-gold-outline:active {
    background: var(--pink-light);
    border-color: var(--pink-light);
    color: #fff;
}

/* ===========================
   ヘッダー
=========================== */
.site-header {
    position: -webkit-sticky;
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 200;
    background: rgba(255, 255, 255, 0.9);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-bottom: 2px solid var(--pink-pale);
    padding: 12px 0;
}
.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.site-logo {
    font-size: 1.1rem;
    font-weight: 900;
    letter-spacing: 0.08em;
}
.logo-img {
    height: 36px;
    width: auto;
    display: block;
}
.header-nav ul {
    display: flex;
    gap: 24px;
    align-items: center;
}
.header-nav a {
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text);
    position: relative;
}
.header-nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-pink-cyan);
    transition: width 0.3s;
}
.header-nav a:hover { color: var(--pink); }
.header-nav a:hover::after { width: 100%; }

/* ヘッダー SNSアイコン */
.header-sns {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: 16px;
}
.header-sns a {
    color: var(--text-muted);
    display: flex;
    align-items: center;
    transition: color 0.2s;
}
.header-sns a:hover { color: var(--pink); }

/* ヘッダー チケットボタン（モバイル専用） */
.header-ticket-btn {
    display: none;
    align-items: center;
    justify-content: center;
    padding: 8px 18px;
    border-radius: 50px;
    background: var(--gradient-pink-cyan);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 900;
    letter-spacing: 0.1em;
    line-height: 1;
    text-decoration: none;
    box-shadow: 0 4px 12px rgba(233,30,139,0.3);
    transition: transform 0.2s, box-shadow 0.2s;
    white-space: nowrap;
}
.header-ticket-btn:hover,
.header-ticket-btn:focus {
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(233,30,139,0.4);
}

/* ハンバーガー */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 44px;
    height: 44px;
    padding: 11px 8px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 300;
}
.hamburger span {
    width: 100%;
    height: 2.5px;
    background: var(--pink);
    border-radius: 2px;
    transition: all 0.3s;
    transform-origin: center;
}
.hamburger.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ===========================
   モバイルドロワー
=========================== */
.nav-drawer {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    height: 100dvh;
    background: linear-gradient(180deg, #FFF0F7 0%, #E8F6FC 100%);
    z-index: 250;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: right 0.3s ease;
    border-left: 2px solid var(--pink-pale);
}
.nav-drawer.active { right: 0; }
.nav-drawer ul {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    text-align: center;
}
.nav-drawer a {
    font-size: 1rem;
    font-weight: 900;
    letter-spacing: 0.12em;
    color: var(--text);
}
.nav-drawer a:hover { color: var(--pink); }

.nav-drawer-site-logo {
    display: contents;
}

.nav-drawer-logo-img {
    height: auto;
    width: 60%;
    display: block;
}

.nav-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(233,30,139,0.15);
    -webkit-backdrop-filter: blur(2px);
    backdrop-filter: blur(2px);
    z-index: 240;
}
.nav-overlay.active { display: block; }

.drawer-sns {
    display: flex;
    gap: 20px;
    padding-top: 2rem;
    border-top: 1px solid var(--pink-pale);
}
.drawer-sns a {
    color: var(--text-muted);
    display: flex;
    align-items: center;
    transition: color 0.2s;
}
.drawer-sns a:hover { color: var(--pink); }

@media (min-width: 769px) {
    .nav-drawer { display: none; }
    .nav-overlay { display: none !important; }
}

/* ===========================
   ヒーロースライダー
=========================== */
.hero-slider { margin-top: 0; position: relative; }
.hero-slides-wrapper {
    position: relative;
    overflow: hidden;
    height: 80vh;
    min-height: 420px;
    max-height: 720px;
}
.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0;
    transition: opacity 1s ease;
}
.hero-slide.active { opacity: 1; }

.hero-slide-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-size: cover;
    background-position: center;
    -webkit-transform: scale(1.04);
    transform: scale(1.04);
    transition: -webkit-transform 7s ease;
    transition: transform 7s ease;
    -webkit-filter: blur(1px);
    filter: blur(1px);
}
.hero-slide.active .hero-slide-bg {
    -webkit-transform: scale(1);
    transform: scale(1);
}

.hero-slide-bg:not([style*="url"]),
.hero-slide-bg[style*="url('')"] {
    background: var(--gradient-hero);
}

.hero-slide-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}
.hero-content { text-align: center; color: #fff; padding: 0 24px; width: 100%; }
.hero-logo-wrap {
    margin: 0;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: clamp(16px, 3vw, 48px);
    flex-wrap: wrap;
}
.hero-logo-mark {
    height: clamp(180px, 38vw, 460px);
    width: auto;
    display: block;
    filter: drop-shadow(0 6px 20px rgba(0,0,0,0.25));
}
.hero-event-detail {
    height: clamp(140px, 30vw, 360px);
    width: auto;
    display: block;
    filter: drop-shadow(0 6px 20px rgba(0,0,0,0.25));
}

/* ティッカー（ヒーローに重ねる透明オーバーレイ） */
.hero-ticker {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 5;
    background: transparent;
    color: transparent;
    overflow: hidden;
    white-space: nowrap;
    padding: 10px 0;
    pointer-events: none;
}
.hero-ticker-track {
    display: inline-flex;
    align-items: center;
    animation: ticker 90s linear infinite;
    gap: 24px;
}
.hero-ticker-img {
    height: clamp(40px, 6vw, 72px);
    width: auto;
    display: block;
    flex-shrink: 0;
    filter: drop-shadow(0 2px 10px rgba(0,0,0,0.25)) invert(1);
}
@keyframes ticker {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* プレースホルダー */
.img-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--pink-pale), var(--cyan-pale));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--pink);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
}

/* ===========================
   アーティストマーキー（トップ）
=========================== */
.artist-section {
    padding: 70px 0 0;
    background: var(--bg-section-alt-alpha);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
.artist-section .section-title {
    margin-bottom: 28px;
}

.artist-marquee {
    width: 100%;
    overflow: hidden;
    padding-bottom: 70px;
}
.artist-marquee-track {
    display: flex;
    gap: 16px;
    width: max-content;
    animation: artist-scroll 60s linear infinite;
}
.artist-marquee:hover .artist-marquee-track {
    animation-play-state: paused;
}

@keyframes artist-scroll {
    0%   { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.artist-marquee-item {
    display: block;
    text-decoration: none;
    color: inherit;
    flex-shrink: 0;
    width: clamp(220px, 28vw, 320px);
    border-radius: var(--border-radius);
    overflow: hidden;
    background: #fff;
    box-shadow: 0 4px 20px rgba(233,30,139,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
}
.artist-marquee-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 28px rgba(233,30,139,0.15);
}
.artist-marquee-img {
    aspect-ratio: 3/2;
    overflow: hidden;
    background: linear-gradient(var(--white));
}
.artist-marquee-img img { width: 100%; height: 100%; object-fit: contain; }

/* ===========================
   CONCEPT
=========================== */
.concept {
    background: var(--bg-white-alpha);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    text-align: center;
    padding: 80px 24px;
    position: relative;
}
.concept .section-title { margin-bottom: 16px; }
.concept-divider {
    width: 50px;
    height: 3px;
    background: var(--gradient-pink-cyan);
    margin: 0 auto 28px;
    border-radius: 2px;
}
.concept-lead {
    font-size: 1.2rem;
    font-weight: 900;
    color: var(--text);
    margin-bottom: 16px;
}
.concept-text {
    font-size: 0.95rem;
    color: var(--text-muted);
    max-width: 540px;
    margin: 0 auto;
    line-height: 2;
}

/* ===========================
   NEWS
=========================== */
.news-section {
    padding: 70px 0;
    background: var(--bg-main-alpha);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
.news-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    border-bottom: 2px solid var(--pink);
    padding-bottom: 12px;
    margin-bottom: 0;
}
.news-list {
    margin-bottom: 32px;
}
.news-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 16px 0;
    border-bottom: 1px solid var(--pink-pale);
}
.news-date {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--pink);
    white-space: nowrap;
    min-width: 90px;
}
.news-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1.6;
}
a.news-title:hover { color: var(--pink); }
.news-more {
    text-align: center;
    margin-top: 8px;
}

/* ===========================
   BLOG（トップ）
=========================== */
.blog-section {
    background: var(--bg-section-alt-alpha);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 32px;
    margin-bottom: 32px;
}
.blog-card {
    display: block;
    border-radius: var(--border-radius);
    overflow: hidden;
    background: #fff;
    box-shadow: 0 4px 20px rgba(233,30,139,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
}
a.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 28px rgba(233,30,139,0.15);
}
.blog-card-thumb {
    aspect-ratio: 3/2;
    overflow: hidden;
    background: linear-gradient(135deg, var(--pink-pale), var(--cyan-pale));
    display: flex;
    align-items: center;
    justify-content: center;
}
.blog-card-thumb img { width: 100%; height: 100%; object-fit: cover; }
.blog-card-thumb .blog-card-thumb-fallback {
    width: auto;
    height: 60%;
    max-width: 70%;
    object-fit: contain;
    padding: 0;
    filter: drop-shadow(0 4px 16px rgba(233,30,139,0.25));
}
.blog-card-body {
    padding: 14px 16px;
}
.blog-card-date {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--pink);
    letter-spacing: 0.05em;
}
.blog-card-title {
    font-size: 0.9rem;
    font-weight: 700;
    margin-top: 4px;
    line-height: 1.5;
    color: var(--text);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.blog-card-excerpt {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 6px;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.blog-grid--archive {
    grid-template-columns: repeat(3, 1fr);
}

/* ===========================
   INFO（日程・会場）
=========================== */
.info-section {
    padding: 70px 0;
    background: var(--bg-section-alt-alpha);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
.info-boxes {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.info-box {
    border: 2px solid var(--pink);
    border-radius: var(--border-radius);
    padding: 28px 24px;
    background: #fff;
    position: relative;
    overflow: hidden;
}
.info-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-pink-cyan);
}
.info-box-label {
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--pink);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.info-box-label::before {
    content: '';
    display: inline-block;
    width: 16px;
    height: 2px;
    background: var(--pink);
}
.info-box h3 {
    font-size: 1.1rem;
    font-weight: 900;
    margin-bottom: 6px;
}
.info-box p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.8;
}

/* 会場リスト */
.venue-list {
    margin: 8px 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.venue-list li {
    font-size: 0.88rem;
    color: var(--text);
    padding-left: 16px;
    position: relative;
    display: flex;
    align-items: center;
    gap: 6px;
}
.venue-list li::before {
    content: '●';
    position: absolute;
    left: 0;
    color: var(--pink);
    font-size: 0.5rem;
    top: 0.55em;
}
.venue-map-link {
    display: inline-flex;
    align-items: center;
    color: var(--pink);
    transition: color 0.2s, transform 0.2s;
    flex-shrink: 0;
}
.venue-map-link:hover {
    color: var(--cyan);
    transform: scale(1.15);
}

/* 主催・協賛・企画 */
.info-sub-section {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--pink-pale);
}
.info-sub-label {
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.2em;
    color: var(--pink);
    margin-bottom: 6px;
}
.info-company-link {
    color: var(--text);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: var(--pink-pale);
    font-weight: 700;
    font-size: 0.95rem;
}
.info-company-link:hover {
    color: var(--pink);
    text-decoration-color: var(--pink);
}
.info-company-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.info-company-list li {
    font-size: 0.85rem;
}
.info-company-list a {
    color: var(--text);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: var(--pink-pale);
}
.info-company-list a:hover {
    color: var(--pink);
    text-decoration-color: var(--pink);
}

/* マップ */
.map-wrapper {
    margin-top: 16px;
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: 8px;
    border: 1px solid var(--pink-pale);
}
.map-wrapper iframe {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    border: 0;
}

/* ===========================
   TICKET
=========================== */
.ticket-section {
    background: var(--gradient-main);
    color: #fff;
    text-align: center;
    padding: 80px 24px;
    position: relative;
    overflow: hidden;
}
.ticket-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    background: rgba(255,255,255,0.06);
    border-radius: 50%;
}
.ticket-section::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 300px;
    height: 300px;
    background: rgba(255,255,255,0.04);
    border-radius: 50%;
}
.ticket-section .section-title {
    background: none;
    -webkit-background-clip: unset;
    -webkit-text-fill-color: #fff;
    background-clip: unset;
    margin-bottom: 8px;
}
.ticket-subtitle {
    font-size: 0.82rem;
    color: rgba(255,255,255,0.7);
    letter-spacing: 0.15em;
    margin-bottom: 40px;
}
.ticket-price {
    font-size: clamp(1.8rem, 6vw, 2.8rem);
    font-weight: 900;
    color: var(--yellow);
    margin-bottom: 8px;
    line-height: 1.4;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
    position: relative;
    z-index: 1;
}
.ticket-period {
    font-size: 0.82rem;
    color: rgba(255,255,255,0.7);
    margin-bottom: 32px;
    position: relative;
    z-index: 1;
}
.ticket-notes {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.6);
    margin-bottom: 32px;
    line-height: 1.8;
    position: relative;
    z-index: 1;
}
.ticket-notes p { margin-bottom: 2px; }

/* ===========================
   SPONSOR
=========================== */
.sponsor-section {
    padding: 80px 0;
    background: var(--bg-white-alpha);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.sponsor-tier {
    margin-bottom: 32px;
}
.sponsor-tier:last-child { margin-bottom: 0; }

.sponsor-grid {
    --sponsor-gap: 16px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: stretch;
    gap: var(--sponsor-gap);
}
.sponsor-grid--platinum .sponsor-logo-card { flex: 0 0 100%; }
.sponsor-grid--gold     .sponsor-logo-card { flex: 0 0 calc((100% - var(--sponsor-gap) * 1) / 2); }
.sponsor-grid--silver   .sponsor-logo-card { flex: 0 0 calc((100% - var(--sponsor-gap) * 2) / 3); }
.sponsor-grid--bronze   .sponsor-logo-card { flex: 0 0 calc((100% - var(--sponsor-gap) * 3) / 4); }

.sponsor-logo-card {
    background: #fff;
    border: 1px solid transparent;
    border-radius: 0;
    /* aspect-ratio: 1 / 1; */
    display: flex;
    align-items: center;
    justify-content: center;
    transition: box-shadow 0.2s, transform 0.2s;
    overflow: hidden;
}
.sponsor-logo-card:hover {
    /* box-shadow: 0 4px 20px rgba(233,30,139,0.12); */
    transform: translateY(-3px);
}
.sponsor-logo-card a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}
.sponsor-grid--platinum .sponsor-logo-card a {
    width: 85%;
}
.sponsor-logo-card img {
    width: 100%;
    height: 100%;
    max-height: 100%;
    object-fit: contain;
    /* padding: 16px; */
}
.sponsor-name-text {
    font-size: 0.8rem;
    font-weight: 700;
    color: #999;
    letter-spacing: 0.1em;
    padding: 16px;
    text-align: center;
}

.tier-platinum .sponsor-logo-card img { width: 70%; }

/* ===========================
   ボトムバナー（スポンサー下・最大2枚）
=========================== */
.bottom-banners-section {
    padding: 40px 0 80px;
}
.bottom-banners-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    align-items: stretch;
}
.bottom-banners-grid:has(.bottom-banner:only-child) {
    grid-template-columns: 1fr;
    max-width: 540px;
    margin: 0 auto;
}
.bottom-banner {
    display: block;
    overflow: hidden;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(233,30,139,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
}
a.bottom-banner:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 28px rgba(233,30,139,0.18);
}
.bottom-banner img {
    width: 100%;
    height: auto;
    display: block;
}

/* ===========================
   フッター
=========================== */
.site-footer {
    background: linear-gradient(135deg, #1a1a2e 0%, #2d1b4e 100%);
    color: rgba(255,255,255,0.6);
    text-align: center;
    padding: 48px 24px 32px;
    font-size: 0.8rem;
}
.footer-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-logo-area { margin-bottom: 4px; }
.footer-logo-img {
    height: 32px;
    width: auto;
    filter: brightness(0) invert(1);
}
.footer-nav ul {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    justify-content: center;
}
.footer-nav a {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: rgba(255,255,255,0.6);
    transition: color 0.2s;
}
.footer-nav a:hover { color: var(--pink-light); }
.footer-sns {
    display: flex;
    gap: 16px;
}
.footer-sns a {
    color: rgba(255,255,255,0.5);
    display: flex;
    align-items: center;
    transition: color 0.2s;
}
.footer-sns a:hover { color: var(--pink-light); }
.footer-legal {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    padding: 16px 0 0;
}
.footer-legal a {
    font-size: 0.72rem;
    color: rgba(255,255,255,0.45);
    transition: color 0.2s;
}
.footer-legal a:hover { color: var(--pink-light); }
.footer-legal-sep {
    color: rgba(255,255,255,0.2);
    font-size: 0.7rem;
}

.footer-bottom {
    padding-top: 16px;
    text-align: center;
}
.footer-produced {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 8px;
    font-size: 0.72rem;
    color: rgba(255,255,255,0.4);
}
.footer-company-logo {
    height: 18px;
    width: auto;
    filter: brightness(0) invert(1);
    opacity: 0.5;
}
.footer-copy {
    font-size: 0.72rem;
    color: rgba(255,255,255,0.35);
}

/* ===========================
   下層ページ共通
=========================== */
.page-main {
    padding: 40px 0 80px;
    min-height: 60vh;
    background: var(--bg-main-alpha);
}

/* パンくずリスト */
.breadcrumb {
    margin-bottom: 32px;
}
.breadcrumb ol {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}
.breadcrumb li {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.breadcrumb li::after {
    content: '›';
    color: var(--pink-pale);
    font-size: 1rem;
    line-height: 1;
}
.breadcrumb li:last-child {
    color: var(--text);
    font-weight: 700;
}
.breadcrumb li:last-child::after { content: none; }
.breadcrumb a { color: var(--text-muted); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--pink); }

/* ページヘッダー */
.page-header {
    text-align: center;
    margin-bottom: 48px;
}
.page-title {
    font-size: 2.2rem;
    font-weight: 900;
    letter-spacing: 0.12em;
    background: var(--gradient-pink-cyan);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.page-subtitle {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-top: 4px;
    letter-spacing: 0.1em;
}

.no-content {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    padding: 60px 0;
}
/* ===========================
   法務ページ（利用規約・プライバシーポリシー）
=========================== */
.legal-content {
    max-width: 700px;
    margin: 0 auto;
    font-size: 0.92rem;
    line-height: 2;
    color: var(--text);
}
.legal-updated {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 32px;
}
.legal-content h2 {
    font-size: 1.1rem;
    font-weight: 900;
    margin: 2em 0 0.8em;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--pink);
    color: var(--text);
}
.legal-content h3 {
    font-size: 0.95rem;
    font-weight: 900;
    margin: 1.5em 0 0.6em;
    color: var(--text);
}
.legal-content p {
    margin-bottom: 1.2em;
}
.legal-content ol,
.legal-content ul {
    padding-left: 1.5em;
    margin-bottom: 1.5em;
}
.legal-content ol { list-style: decimal; }
.legal-content ul { list-style: disc; }
.legal-content li {
    margin-bottom: 0.4em;
    line-height: 1.8;
}
.legal-content a {
    color: var(--pink);
    text-decoration: underline;
}
.legal-content a:hover {
    color: var(--pink-light);
}
.legal-contact {
    background: var(--bg-section-alt);
    border-radius: var(--border-radius);
    padding: 20px 24px;
    margin-top: 8px;
}
.legal-contact p {
    margin-bottom: 4px;
    font-size: 0.88rem;
}

.demo-notice {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.82rem;
    margin-top: 32px;
    padding: 12px;
    background: var(--pink-pale);
    border-radius: 8px;
}

/* ===========================
   アーティスト一覧グリッド
=========================== */
.artist-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.artist-grid-item {
    border-radius: var(--border-radius);
    overflow: hidden;
    background: #fff;
    box-shadow: 0 4px 20px rgba(233,30,139,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
}
.artist-grid-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 32px rgba(233,30,139,0.15);
}
.artist-grid-item a {
    display: block;
    color: inherit;
}
.artist-grid-img {
    aspect-ratio: 3/2;
    overflow: hidden;
    background: var(--white);
}
.artist-grid-img img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: transform 0.4s;
}
.artist-grid-item:hover .artist-grid-img img {
    transform: scale(1.06);
}
.artist-grid-info {
    padding: 16px;
}
.artist-grid-name {
    font-size: 1rem;
    font-weight: 900;
    margin-bottom: 4px;
}
.artist-grid-genre {
    font-size: 0.72rem;
    color: var(--pink);
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}
.artist-grid-notes {
    margin-top: 40px;
    font-size: 0.78rem;
    line-height: 2;
    color: var(--text-muted);
    text-align: center;
}

/* ===========================
   タイムテーブル（画像1枚表示）
=========================== */
.timetable-image-wrap {
    text-align: center;
    margin: 0 auto;
    padding: 12px 0 48px;
}
.timetable-image {
    max-width: 100%;
    height: auto;
    margin: 0 auto;
    border-radius: var(--border-radius);
    box-shadow: 0 6px 24px rgba(233,30,139,0.12);
}

/* ===========================
   タイムテーブル（旧・出演枠リスト：未使用）
=========================== */
.tt-day {
    margin-bottom: 48px;
}
.tt-day:last-child { margin-bottom: 0; }
.tt-day-title {
    font-size: 1.2rem;
    font-weight: 900;
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--pink);
}
.tt-day-badge {
    background: var(--gradient-pink-cyan);
    color: #fff;
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.15em;
    padding: 5px 16px;
    border-radius: 50px;
}
.tt-stage {
    margin-bottom: 28px;
}
.tt-stage-name {
    font-size: 0.85rem;
    font-weight: 900;
    letter-spacing: 0.15em;
    color: var(--pink);
    margin-bottom: 12px;
    padding-left: 12px;
    border-left: 3px solid var(--pink);
}
.tt-entries {
    display: flex;
    flex-direction: column;
}
.tt-entry {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 14px 16px;
    border-bottom: 1px solid var(--pink-pale);
    border-radius: 6px;
    transition: background 0.2s;
}
.tt-entry:hover {
    background: var(--bg-section-alt);
}
.tt-time {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--cyan);
    white-space: nowrap;
    min-width: 110px;
    font-variant-numeric: tabular-nums;
}
.tt-artist {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text);
}

/* ===========================
   一覧ページ（ニュース・ブログ共通）
=========================== */
.archive-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}
.archive-item {
    border-bottom: 1px solid var(--pink-pale);
}
.archive-item:first-child {
    border-top: 1px solid var(--pink-pale);
}
.archive-item-link {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 20px 0;
    transition: opacity 0.2s;
}
.archive-item-link:hover { opacity: 0.7; }
.archive-item-thumb {
    width: 120px;
    flex-shrink: 0;
    border-radius: 8px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--pink-pale), var(--cyan-pale));
}
.archive-item-thumb img {
    width: 100%;
    aspect-ratio: 16/10;
    object-fit: cover;
}
.archive-item-body { flex: 1; min-width: 0; }
.archive-item-date {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--pink);
    letter-spacing: 0.05em;
}
.archive-item-title {
    font-size: 1rem;
    font-weight: 700;
    margin-top: 4px;
    line-height: 1.6;
    color: var(--text);
}
.archive-item-excerpt {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-top: 6px;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ページネーション */
.pagination {
    margin-top: 40px;
    text-align: center;
}
.pagination .nav-links {
    display: flex;
    justify-content: center;
    gap: 6px;
}
.pagination .page-numbers {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    font-size: 0.85rem;
    font-weight: 700;
    border: 1px solid var(--pink-pale);
    border-radius: 50%;
    color: var(--text);
    transition: all 0.2s;
}
.pagination .page-numbers.current {
    background: var(--gradient-pink-cyan);
    color: #fff;
    border-color: transparent;
}
.pagination .page-numbers:hover:not(.current) {
    border-color: var(--pink);
    color: var(--pink);
}

/* ===========================
   詳細ページ（ニュース・ブログ共通）
=========================== */
.single-article {
    max-width: 700px;
    margin: 0 auto;
}
.single-header {
    margin-bottom: 36px;
    padding-bottom: 24px;
    border-bottom: 2px solid var(--pink);
}
.single-date {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--pink);
    letter-spacing: 0.05em;
}
.single-title {
    font-size: 1.5rem;
    font-weight: 900;
    line-height: 1.5;
    margin-top: 8px;
    color: var(--text);
}
.single-content {
    font-size: 0.95rem;
    line-height: 2;
    color: var(--text);
    margin-bottom: 40px;
}
.single-content p { margin-bottom: 1.5em; }
.single-content img {
    border-radius: 8px;
    margin: 1.5em 0;
}
.single-content h2 {
    font-size: 1.2rem;
    font-weight: 900;
    margin: 2em 0 0.8em;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--pink);
}
.single-content h3 {
    font-size: 1.05rem;
    font-weight: 900;
    margin: 1.5em 0 0.6em;
}
.single-content ul, .single-content ol {
    padding-left: 1.5em;
    margin-bottom: 1.5em;
    list-style: disc;
}
.single-content ol { list-style: decimal; }
.single-content blockquote {
    border-left: 3px solid var(--pink);
    padding: 12px 20px;
    margin: 1.5em 0;
    background: var(--bg-section-alt);
    font-style: italic;
    color: var(--text-muted);
    border-radius: 0 8px 8px 0;
}

/* SNSシェアボタン */
.share-buttons {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 0;
    margin-bottom: 32px;
    border-top: 1px solid var(--pink-pale);
    border-bottom: 1px solid var(--pink-pale);
}
.share-label {
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    margin-right: 4px;
}
.share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid var(--pink-pale);
    color: var(--text-muted);
    background: transparent;
    cursor: pointer;
    padding: 0;
    transition: all 0.2s;
}
.share-btn:hover {
    border-color: var(--pink);
    color: var(--pink);
    box-shadow: 0 2px 8px rgba(233,30,139,0.15);
}
.share-btn--x:hover { color: #000; border-color: #000; }
.share-btn--line:hover { border-color: #06C755; }
.share-btn--line img { width: 22px; height: 22px; display: block; }
.share-btn--copy { position: relative; }
.share-btn--copy:hover { color: var(--pink); border-color: var(--pink); }
.share-copy-toast {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    background: #111;
    color: #fff;
    font-size: 0.7rem;
    letter-spacing: 0.05em;
    padding: 4px 10px;
    border-radius: 4px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s, transform 0.2s;
    white-space: nowrap;
}
.share-btn--copy.is-copied .share-copy-toast {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* 前後記事ナビ */
.post-nav {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 40px;
}
.post-nav-item { flex: 1; min-width: 0; }
.post-nav-next { text-align: right; }
.post-nav-item a {
    display: block;
    padding: 16px;
    border: 1px solid var(--pink-pale);
    border-radius: var(--border-radius);
    transition: border-color 0.2s, box-shadow 0.2s;
}
.post-nav-item a:hover {
    border-color: var(--pink);
    box-shadow: 0 4px 12px rgba(233,30,139,0.1);
}
.post-nav-label {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--pink);
    letter-spacing: 0.1em;
}
.post-nav-title {
    display: block;
    font-size: 0.85rem;
    font-weight: 700;
    margin-top: 4px;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.back-to-archive {
    text-align: center;
}

/* ===========================
   スマホ対応（〜768px）
=========================== */
@media (max-width: 768px) {
    /* 共通 */
    .section-padding { padding: 48px 0; }

    /* ヘッダー */
    .header-nav { display: none; }
    .header-sns { display: none; }
    .hamburger { display: flex; }
    .header-ticket-btn {
        display: inline-flex;
        margin-left: auto;
        margin-right: 8px;
        padding: 7px 14px;
        font-size: 0.7rem;
        letter-spacing: 0.08em;
    }
    .logo-img { height: 28px; }
    .nav-drawer { display: flex; gap: 3%;}

    /* ヒーロー */
    .hero-slider { margin-top: 0; }
    .hero-slides-wrapper {
        height: 90svh;
        min-height: 480px;
        max-height: none;
    }
    .hero-logo-wrap {
        flex-direction: column;
        gap: clamp(16px, 5vw, 32px);
    }
    .hero-logo-mark { height: clamp(180px, 62vw, 320px); }
    .hero-event-detail { height: clamp(120px, 50vw, 260px); }
    .hero-ticker { padding: 8px 0; }
    .hero-ticker-track { gap: 16px; }
    .hero-ticker-img { height: clamp(28px, 7vw, 48px); }

    /* CONCEPT */
    .concept { padding: 48px 20px; }
    .concept-text { font-size: 0.9rem; }
    /* .concept-text br { display: none; } */

    /* NEWS */
    .news-item { gap: 10px; }
    .news-date { min-width: 76px; font-size: 0.76rem; }
    .news-title { font-size: 0.85rem; }

    /* BLOG */
    .blog-grid { grid-template-columns: 1fr; gap: 16px; }
    .blog-grid--archive { grid-template-columns: repeat(2, 1fr); }

    /* INFO */
    .info-section { padding: 48px 0; }
    .info-box h3 {
        font-size: 0.95rem;
        word-break: break-all;
        line-height: 1.6;
    }
    .info-box { padding: 22px 18px; }

    /* TICKET */
    .ticket-section { padding: 56px 20px; }
    .btn-gold-outline {
        padding: 14px 32px;
        font-size: 0.85rem;
        letter-spacing: 0.08em;
    }

    /* アーティストマーキー */
    .artist-section { padding: 48px 0 0; }
    .artist-marquee { padding-bottom: 48px; }
    .artist-marquee-item { width: clamp(200px, 65vw, 280px); }
    .artist-marquee-track { animation-duration: 40s; }

    /* スポンサー */
    .sponsor-section { padding: 56px 0; }
    .tier-platinum .sponsor-logo-card img { padding: 16px 24px; width: 100%;}

    /* ボトムバナー（スマホは縦並び） */
    .bottom-banners-section { padding: 32px 0 56px; }
    .bottom-banners-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .sponsor-grid--platinum .sponsor-logo-card a {
        width: 100%;
    }

    .footer-nav ul {
        flex-direction: column;
        gap: 5px;
    }

    /* 下層ページ */
    .page-main { padding: 28px 0 60px; }
    .page-title { font-size: 1.6rem; }

    /* アーティストグリッド */
    .artist-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    .artist-grid-info { padding: 12px; }
    .artist-grid-name { font-size: 0.88rem; }

    /* タイムテーブル */
    .tt-entry { gap: 12px; padding: 12px; }
    .tt-time { min-width: 90px; font-size: 0.78rem; }
    .tt-artist { font-size: 0.88rem; }

    /* アーカイブ */
    .archive-item-thumb { width: 80px; }
    .archive-item-title { font-size: 0.9rem; }

    /* 詳細 */
    .single-title { font-size: 1.2rem; }
    .post-nav { flex-direction: column; gap: 10px; }
    .post-nav-next { text-align: left; }
}