:root {
    --primary-color: #a3c1ff;
    /* 大人っぽいダスティブルー */
    --accent-color: #ffb7c5;
    /* 落ち着いたサクラピンク */
    --card-bg: rgba(255, 255, 255, 0.06);
    --glass-border: rgba(255, 255, 255, 0.12);
    --text-main: #ffffff;
    --text-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    --glow-primary: 0 0 25px rgba(163, 193, 255, 0.5);
    --glow-accent: 0 0 25px rgba(255, 183, 197, 0.5);
    --bg-dark-subtle: rgba(5, 5, 16, 0.75);
    /* コントラストを上げて文字を読みやすく */
    --section-padding: 100px 0;
    --transition-speed: 0.3s;
    --font-display: 'Montserrat', sans-serif;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: 'Noto Sans JP', 'Montserrat', sans-serif;
    /* 夜から朝へのダイナミックグラデーション */
    background: linear-gradient(to bottom,
            #050510 0%,
            #0a0a20 15%,
            /* 深い夜 */
            #1f1f3a 35%,
            /* 静かな夜 */
            #2c3e50 55%,
            /* 夜明け前 */
            #5a83a6 75%,
            /* 明け方の空 */
            #82c4ff 90%,
            /* 澄んだ青空 */
            #bfe9ff 100%
            /* 眩しい朝 */
        );
    background-attachment: scroll;
    background-size: 100% 100%;
    min-height: 100vh;
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

/* メニューが開いている時に背面のスクロールを禁止 */
body.menu-open {
    overflow: hidden;
}

a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 4px;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Design */
.site-header {
    position: fixed;
    width: 100%;
    top: 20px;
    left: 0;
    z-index: 1000;
    pointer-events: none;
}

.header-flex {
    pointer-events: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    padding: 0 30px;
    height: 60px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.site-title {
    margin: 0;
    display: flex;
    align-items: center;
}

.logo-img {
    height: 80px;
    /* ヘッダーに合わせてサイズを最適化 */
    width: auto;
    object-fit: contain;
    transition: transform var(--transition-speed) ease;
    filter: drop-shadow(0 0 10px rgba(163, 193, 255, 0.3));
}

.logo-img:hover {
    transform: scale(1.05);
}

/* Navigation */
.main-nav ul {
    display: flex;
    list-style: none;
    gap: 20px;
    margin: 0;
    padding: 0;
}

.main-nav a {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.9rem;
    transition: opacity var(--transition-speed);
    letter-spacing: 0.05rem;
    text-transform: uppercase;
}

.main-nav a:hover {
    opacity: 0.7;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    width: 44px;
    height: 44px;
    z-index: 1001;
}

.menu-toggle .bar {
    width: 25px;
    height: 2px;
    background: var(--text-main);
    transition: var(--transition-speed);
}

/* Heading visibility */
.h2-mobile {
    display: none;
}

.h2-desktop {
    display: block;
}


/* Hero Section - Glassmorphism */
.hero-section {
    height: 100vh;
    padding-top: 70px;
    /* ヘッダーの高さ分を考慮して視覚的な中心を調整 */
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    background: transparent;
    /* bodyの背景を見せる */
    position: relative;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* 配信画面風のスキャンライン */
    background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.1) 50%),
        linear-gradient(90deg, rgba(255, 0, 0, 0.03), rgba(0, 255, 0, 0.01), rgba(0, 0, 255, 0.03));
    background-size: 100% 3px, 3px 100%;
    pointer-events: none;
    z-index: 2;
}

.hero-text-card {
    background: none;
    padding: 0;
    border: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    text-align: center;
    width: 100%;
    animation: heroFadeIn 1.2s cubic-bezier(0.22, 1, 0.36, 1);
    position: relative;
}

/* Background Effects (Stars & Clouds) */
.bg-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.stars-layer,
.clouds-layer {
    position: absolute;
    width: 100%;
    height: 100%;
    will-change: transform, opacity;
}

.star {
    position: absolute;
    width: 2px;
    height: 2px;
    background: white;
    border-radius: 50%;
    box-shadow: 0 0 8px 1px rgba(255, 255, 255, 0.6);
    animation: twinkle 4s infinite alternate;
}

@keyframes twinkle {
    0% {
        opacity: 0.3;
        transform: scale(0.8);
    }

    100% {
        opacity: 1;
        transform: scale(1.2);
    }
}

.cloud {
    position: absolute;
    background: rgba(255, 255, 255, 0.25);
    filter: blur(50px);
    border-radius: 50%;
    opacity: 0;
    /* JSでコントロール */
}

.cloud-1 {
    width: 400px;
    aspect-ratio: 2/1;
    bottom: 20%;
    left: -100px;
}

.cloud-2 {
    width: 300px;
    height: 150px;
    bottom: 10%;
    right: -50px;
}

.cloud-3 {
    width: 500px;
    height: 250px;
    bottom: -50px;
    left: 30%;
}

.hero-text-card h2 {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: 0.3rem;
    text-indent: 0.3rem;
    /* 完璧な中央揃え */
    /* letter-spacingによる右側の余白分を押し戻して完璧な中央に */
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #fff 30%, var(--primary-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 20px rgba(163, 193, 255, 0.5));
}

.hero-subtext {
    font-size: 1.2rem;
    letter-spacing: 0.4rem;
    text-indent: 0.4rem;
    /* letter-spacingによる右側の余白分を押し戻して完璧な中央に */
    opacity: 0.8;
    font-weight: 400;
    margin-bottom: 3rem;
}

/* Scroll Indicator */
.hero-scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    margin-top: 20px;
}

.hero-scroll-indicator span {
    font-size: 0.7rem;
    letter-spacing: 0.2rem;
    opacity: 0.6;
}

.mouse {
    width: 24px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    position: relative;
}

.mouse::before {
    content: '';
    width: 4px;
    height: 8px;
    background: var(--primary-color);
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 8px;
    border-radius: 2px;
    animation: scrollWheel 2s infinite;
}

@keyframes scrollWheel {
    0% {
        opacity: 0;
        transform: translate(-50%, 0);
    }

    30% {
        opacity: 1;
    }

    100% {
        opacity: 0;
        transform: translate(-50%, 15px);
    }
}

/* Profile Grid */
.profile-section {
    padding: var(--section-padding);
}

.profile-grid {
    position: relative;
    display: grid;
    grid-template-columns: 1.2fr 1.8fr;
    gap: 80px;
    margin-top: 60px;
    padding: 0;
    align-items: center;
}

/* プロフィールセクションのユニークな背景装飾 */
.profile-section {
    position: relative;
    overflow: hidden;
}

.profile-section::after {
    content: 'BIOGRAPHY';
    position: absolute;
    left: -20px;
    top: 50%;
    transform: translateY(-50%) rotate(-90deg);
    font-size: 8rem;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.03);
    z-index: -1;
    font-family: var(--font-display);
    letter-spacing: 2rem;
}

.profile-img-container {
    position: relative;
    z-index: 1;
}

.profile-img-container::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    width: 100px;
    height: 100px;
    border-top: 5px solid var(--accent-color);
    border-left: 5px solid var(--accent-color);
    filter: drop-shadow(0 0 10px var(--accent-color));
    z-index: -1;
    animation: borderExpand 4s infinite alternate;
}

@keyframes borderExpand {
    0% {
        transform: translate(0, 0);
    }

    100% {
        transform: translate(-10px, -10px);
    }
}

.profile-img {
    width: 100%;
    max-width: 400px;
    display: block;
    margin: 0 auto;
    border-radius: 30px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.profile-content {
    text-align: left;
    /* 読みやすさのために左揃え */
    background: var(--bg-dark-subtle);
    padding: 40px;
    border-radius: 40px;
    backdrop-filter: blur(20px);
    /* 背景のボケを強くして視認性を向上 */
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: inset 0 0 20px rgba(255, 255, 255, 0.02);
}

.profile-qa-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
}

.qa-card {
    background: transparent;
    padding: 10px 0;
    border: none;
    display: flex;
    flex-direction: column;
}

.qa-label {
    font-size: 0.75rem;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.1rem;
    margin-bottom: 4px;
}

/* Works Cards */
.works-section {
    padding: var(--section-padding);
}

.works-section .container {
    max-width: 1200px;
    /* カレンダーを大きく見せるために幅を拡張 */
}

.new-works-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(auto, 600px));
    /* 幅を固定しすぎず調整 */
    justify-content: center;
    /* グリッド全体を中央へ */
    gap: 40px;
    text-align: center;
}

.calendar-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 20px;
    justify-content: center;
    font-size: 0.95rem;
    opacity: 0.9;
    margin-bottom: 30px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
}

.dot.live {
    background: #ff4b2b;
    box-shadow: 0 0 8px rgba(255, 202, 40, 0.6);
}

.dot.video {
    background: #ffca28;
    box-shadow: 0 0 8px rgba(255, 202, 40, 0.6);
}

.dot.event {
    background: #42a5f5;
}

.dot.membership {
    background: #9575cd;
}

.dot.other {
    background: #eeeeee;
}

.work-card {
    flex: 1 1 500px;
    max-width: 600px;
    background: transparent;
    border: none;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), filter var(--transition-speed) ease;
    filter: drop-shadow(0 0 0 rgba(163, 193, 255, 0));
}

.work-card:hover {
    transform: translateY(-15px);
    filter: drop-shadow(0 10px 20px rgba(163, 193, 255, 0.2));
    background: rgba(255, 255, 255, 0.05);
}

.work-card h4 {
    margin-top: 0;
    color: var(--primary-color);
}

/* Attention List */
.attention-list {
    list-style: none;
    padding: 0;
}

.attention-list li {
    margin-bottom: 10px;
    font-size: 0.9rem;
}

.attention-list i {
    margin-right: 10px;
    color: var(--accent-color);
}

/* SNS & Live */
.sns-section {
    padding: var(--section-padding);
}

.sns-icons-large {
    display: flex;
    justify-content: center;
    gap: 40px;
    font-size: 3rem;
    margin-bottom: 50px;
}

.sns-link-item {
    color: var(--text-main);
    transition: transform var(--transition-speed);
}

.sns-link-item:hover {
    transform: scale(1.2);
    color: var(--primary-color);
}

.live-grid {
    display: grid;
    grid-template-columns: 1fr;
    /* メンバーシップを主役にするため、幅いっぱいに */
    gap: 40px;
}

.live-card {
    background: transparent;
    padding: 40px;
    border-radius: 30px;
    border: none;
    text-align: center;
    transition: background var(--transition-speed) ease, transform var(--transition-speed) ease;
    filter: drop-shadow(0 0 0 rgba(163, 193, 255, 0));
}

.live-card:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-5px);
}

.live-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.membership-card {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-around;
    padding: 60px 40px;
    margin: 40px 0;
    border-radius: 40px;
    /* オーロラのような動く背景 */
    background: linear-gradient(135deg, rgba(255, 183, 197, 0.1) 0%, rgba(163, 193, 255, 0.1) 100%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.membership-card:hover {
    transform: translateY(-8px);
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
}

.membership-card::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, rgba(255, 183, 197, 0.3), transparent 30%);
    animation: rotateGlow 10s linear infinite;
    z-index: -1;
}

.membership-info {
    flex: 1;
    min-width: 320px;
    text-align: left;
}

.membership-info h4 {
    font-size: 2.5rem;
    font-weight: 800;
    margin: 0 0 1rem 0;
    line-height: 1.2;
    background: linear-gradient(to right, #fff, #ff8fa3);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 15px rgba(255, 143, 163, 0.5));
}

.membership-perks {
    flex: 1;
    min-width: 300px;
    list-style: none;
    padding: 20px;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.membership-perks li {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 25px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 20px;
    border-left: 4px solid var(--accent-color);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform 0.3s ease, background 0.3s ease;
}

.membership-perks li:hover {
    transform: translateX(12px);
    background: rgba(255, 255, 255, 0.08);
    border-left-color: #fff;
}

.membership-perks li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1rem;
    padding: 12px 20px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 15px;
    border-left: 3px solid var(--accent-color);
    backdrop-filter: blur(5px);
    transition: transform 0.3s ease;
}

.membership-perks li:hover {
    transform: translateX(10px);
    background: rgba(255, 255, 255, 0.08);
}

.membership-badge {
    display: inline-block;
    background: var(--accent-color);
    color: #331a1e;
    /* 読みやすさ重視の濃い色 */
    padding: 6px 20px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 900;
    margin-bottom: 20px;
    box-shadow: 0 4px 15px rgba(255, 183, 197, 0.4);
    letter-spacing: 0.1rem;
}

.membership-btn {
    display: inline-block;
    padding: 16px 48px;
    margin-top: 25px;
    background: linear-gradient(135deg, var(--accent-color) 0%, #ff8fa3 50%, var(--accent-color) 100%);
    background-size: 200% 100%;
    color: #331a1e !important;
    border-radius: 50px;
    font-weight: 800;
    font-size: 1.05rem;
    letter-spacing: 0.2rem;
    text-indent: 0.2rem;
    /* 中央揃えの補正 */
    text-decoration: none;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.4);
    cursor: pointer;
    box-shadow: 0 10px 30px -5px rgba(255, 183, 197, 0.5), inset 0 0 10px rgba(255, 255, 255, 0.2);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.3s ease;
    animation: shimmerMove 3s linear infinite, glowPulse 2s infinite alternate;
}

.membership-btn:hover {
    transform: scale(1.03) translateY(-3px);
    box-shadow: 0 15px 35px -5px rgba(255, 183, 197, 0.7), inset 0 0 15px rgba(255, 255, 255, 0.4);
}

/* 流れる光の筋 */
.membership-btn::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -100%;
    width: 80px;
    height: 200%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5), transparent);
    transform: rotate(30deg);
    animation: flareSweep 3.5s infinite ease-in-out;
}

@keyframes shimmerMove {
    0% {
        background-position: 0% center;
    }

    100% {
        background-position: 200% center;
    }
}

@keyframes flareSweep {
    0% {
        left: -100%;
    }

    20% {
        left: 150%;
    }

    100% {
        left: 150%;
    }
}

@keyframes glowPulse {
    0% {
        box-shadow: 0 4px 15px rgba(255, 183, 197, 0.4);
    }

    100% {
        box-shadow: 0 4px 25px rgba(255, 183, 197, 0.8), 0 0 10px rgba(255, 255, 255, 0.3);
    }
}

.live-badge {
    background: linear-gradient(135deg, #ff4b2b, #ff416c);
    padding: 6px 18px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.05rem;
    box-shadow: 0 4px 10px rgba(255, 75, 43, 0.3);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.live-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    background: #fff;
    border-radius: 50%;
    box-shadow: 0 0 10px #fff;
    animation: livePulse 0.8s infinite alternate;
}

.live-badge::after {
    content: 'LIVE';
}

@keyframes livePulse {
    from {
        opacity: 0.4;
        transform: scale(0.8);
    }

    to {
        opacity: 1;
        transform: scale(1.2);
    }
}

.iframe-container {
    position: relative;
    padding-top: 56.25%;
    margin-top: 20px;
    border-radius: 15px;
    overflow: hidden;
}

.iframe-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Contact Form */
.contact-card {
    background: transparent;
    padding: 40px;
    border: none;
    max-width: 800px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.05);
    color: white;
    backdrop-filter: blur(5px);
    transition: border-color var(--transition-speed), background var(--transition-speed);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    outline: none;
}

.submit-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 30px;
    font-weight: bold;
    cursor: pointer;
    width: 100%;
    transition: background var(--transition-speed);
}

.submit-btn:hover {
    background: #5a8ee6;
}

/* Global Section Title */
.section-title {
    position: relative;
    text-align: center;
    font-size: 2.8rem;
    margin-bottom: 80px;
    letter-spacing: 0.4rem;
    font-weight: 800;
    text-shadow: var(--text-shadow);
    z-index: 1;
}

/* タイトルの背景に浮かぶ巨大な英字装飾 */
.section-title::before {
    content: attr(data-en);
    font-family: var(--font-display);
    position: absolute;
    top: 40%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 6rem;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.05);
    letter-spacing: 1.5rem;
    z-index: -1;
    white-space: nowrap;
    pointer-events: none;
    text-transform: uppercase;
}

@keyframes rotateGlow {
    from {
        transform: translate(-50%, -50%) rotate(0deg);
    }

    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--accent-color);
    margin: 20px auto 0;
    border-radius: 2px;
}

/* Footer */
.site-footer {
    padding: 40px 0;
    text-align: center;
    background: rgba(0, 0, 0, 0.2);
    font-size: 0.8rem;
}

/* Loader */
#loader-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #050510;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: opacity 0.5s;
}

#loader-wrapper.hidden {
    opacity: 0;
    pointer-events: none;
}

.loader {
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Responsive */
@media (max-width: 768px) {
    :root {
        --section-padding: 60px 0;
    }

    .h2-desktop {
        display: none;
    }

    .h2-mobile {
        display: block;
        font-size: 1.8rem;
    }

    .menu-toggle {
        display: flex;
    }

    .main-nav {
        position: fixed;
        top: 80px;
        /* ヘッダー(20px+60px)の直下から開始 */
        left: 0;
        width: 100%;
        /* エモいボケ感：ブルーとピンクが混ざり合うグラデーション */
        background: radial-gradient(circle at 10% 20%, rgba(163, 193, 255, 0.15), transparent 40%),
            radial-gradient(circle at 90% 80%, rgba(255, 183, 197, 0.15), transparent 40%),
            rgba(5, 5, 16, 0.85);
        backdrop-filter: blur(25px) saturate(150%);
        -webkit-backdrop-filter: blur(25px) saturate(150%);
        height: 0;
        overflow: hidden;
        transition: height 0.6s cubic-bezier(0.22, 1, 0.36, 1);
        border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    .main-nav.is-open {
        height: calc(100vh - 80px);
        padding: 40px 0;
        box-shadow: inset 0 20px 40px rgba(0, 0, 0, 0.3);
    }

    .main-nav ul {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 30px;
    }

    .main-nav ul li {
        opacity: 0;
        transform: translateY(20px);
        transition: opacity 0.5s cubic-bezier(0.22, 1, 0.36, 1),
            transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    }

    .main-nav.is-open ul li {
        opacity: 1;
        transform: translateY(0);
    }

    /* メニュー項目を順番に遅らせて表示 */
    .main-nav.is-open ul li:nth-child(1) {
        transition-delay: 0.15s;
    }

    .main-nav.is-open ul li:nth-child(2) {
        transition-delay: 0.25s;
    }

    .main-nav.is-open ul li:nth-child(3) {
        transition-delay: 0.35s;
    }

    .main-nav.is-open ul li:nth-child(4) {
        transition-delay: 0.45s;
    }

    .main-nav.is-open ul li:nth-child(5) {
        transition-delay: 0.55s;
    }
}

.profile-grid,
.live-grid {
    grid-template-columns: 1fr;
}

.hero-text-card {
    padding: 1.5rem;
}

.section-title {
    font-size: 2rem;
}

.hero-text-card h2 {
    font-size: 2rem;
    line-height: 1.4;
}

.profile-grid {
    padding: 20px;
    gap: 30px;
}

.sns-icons-large {
    font-size: 2.5rem;
    gap: 20px;
}

.live-grid {
    gap: 20px;
}

.contact-card {
    padding: 20px;
}

/* Scroll Reveal - スクロールでふわっと出すための設定 */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 1.2s cubic-bezier(0.22, 1, 0.36, 1),
        transform 1.2s cubic-bezier(0.22, 1, 0.36, 1);
    will-change: transform, opacity;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* 要素ごとにタイミングをずらすためのユーティリティ */
.delay-1 {
    transition-delay: 0.1s;
}

.delay-2 {
    transition-delay: 0.2s;
}

.delay-3 {
    transition-delay: 0.3s;
}

/* Heroセクション専用の登場アニメーション */
@keyframes heroFadeIn {
    0% {
        opacity: 0;
        transform: translateY(40px) scale(0.98);
    }

    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}