/* ===== 基本設定 ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

/* ===== ライトテーマ（デフォルト） ===== */
body.light-theme {
    --bg-primary: #fefae0;
    --bg-secondary: #faedcd;
    --bg-card: rgba(255, 255, 255, 0.8);
    --text-primary: #4d413b;
    --text-secondary: #5c4d46;
    --heading-color: #8b4513;
    --accent-primary: #e67e22;
    --accent-secondary: #d35400;
    --border-color: rgba(164, 92, 58, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.1);
    --gradient-hero: linear-gradient(rgba(164, 92, 58, 0.85), rgba(200, 126, 79, 0.85));
    --player-bg: #fff;
}

/* ===== ダークテーマ ===== */
body.dark-theme {
    --bg-primary: #1a1410;
    --bg-secondary: #2d2419;
    --bg-card: rgba(45, 36, 25, 0.9);
    --text-primary: #f5e6d3;
    --text-secondary: #d4c5b9;
    --heading-color: #e09f7d;
    --accent-primary: #ff8c42;
    --accent-secondary: #ff6b35;
    --border-color: rgba(230, 126, 34, 0.2);
    --shadow-color: rgba(0, 0, 0, 0.3);
    --gradient-hero: linear-gradient(rgba(26, 20, 16, 0.85), rgba(45, 36, 25, 0.85));
    --player-bg: #2d2419;
}

body {
    font-family: 'Noto Sans JP', 'M PLUS Rounded 1c', sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease;
}

h1,
h2,
h3 {
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 700;
    color: var(--heading-color);
    margin-bottom: 0.8em;
    line-height: 1.4;
}

h2 {
    font-size: 2rem;
    text-align: center;
    font-weight: 900;
    margin-bottom: 1.2em;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5em;
}

p {
    margin-bottom: 1.5em;
    font-family: 'M PLUS Rounded 1c', sans-serif;
    font-weight: 500;
}

a {
    color: var(--accent-secondary);
    text-decoration: none;
    transition: color 0.3s ease, opacity 0.3s ease;
}

a:hover {
    color: var(--accent-primary);
    opacity: 0.8;
    text-decoration: underline;
}

a:focus,
a:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 4px;
    box-shadow: 0 0 0 4px rgba(230, 126, 34, 0.2);
    border-radius: 4px;
}

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

ul {
    list-style: none;
}

.sp-br {
    display: block;
}

@media (min-width: 769px) {
    .sp-br {
        display: none;
    }
}

/* ===== スクロール進捗バー ===== */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    z-index: 9999;
    transition: width 0.1s ease;
    box-shadow: 0 2px 4px rgba(230, 126, 34, 0.3);
}

/* ===== ダークモード切り替えボタン ===== */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    cursor: pointer;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px var(--shadow-color);
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 15px var(--shadow-color);
}

.theme-toggle:focus {
    outline: 3px solid var(--accent-primary);
    outline-offset: 2px;
}

.light-theme .theme-icon.sun {
    display: block;
}

.light-theme .theme-icon.moon {
    display: none;
}

.dark-theme .theme-icon.sun {
    display: none;
}

.dark-theme .theme-icon.moon {
    display: block;
}

/* ===== フローティングシェアボタン ===== */
.share-buttons-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 1000;
}

.share-toggle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--accent-primary);
    border: none;
    color: #fff;
    font-size: 1.8rem;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(230, 126, 34, 0.4);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.share-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(230, 126, 34, 0.6);
}

.share-toggle:focus {
    outline: 3px solid var(--accent-primary);
    outline-offset: 3px;
}

.share-menu {
    position: absolute;
    bottom: 75px;
    right: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
    opacity: 0;
    pointer-events: none;
    transform: translateY(20px);
    transition: all 0.3s ease;
}

.share-menu.active {
    opacity: 1;
    pointer-events: all;
    transform: translateY(0);
}

.share-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    text-decoration: none;
    border: none;
    cursor: pointer;
}

.share-btn:hover {
    transform: scale(1.15);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
    text-decoration: none;
}

.share-btn.twitter {
    background: #000;
}

.share-btn.facebook {
    background: #1877f2;
}

.share-btn.line {
    background: #00B900;
}

.share-btn.copy {
    background: #6c757d;
}

/* ===== トースト通知 ===== */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: rgba(0, 0, 0, 0.85);
    color: #fff;
    padding: 15px 30px;
    border-radius: 50px;
    font-weight: 700;
    z-index: 10000;
    opacity: 0;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ===== レイアウト・共通 ===== */
.container {
    max-width: 960px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 20px;
    padding-right: 20px;
}

.content-section {
    padding: 70px 0;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.content-section.visible {
    opacity: 1;
    transform: translateY(0);
}

.bg-light {
    background-color: var(--bg-secondary);
}

/* ===== ヒーローセクション ===== */
.hero {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 90vh;
    padding: 60px 20px;
    text-align: center;
    color: #fff;
    position: relative;
    overflow: hidden;
    background-image:
        var(--gradient-hero),
        url('../img/tonjiru-background.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(60, 30, 10, 0.3), rgba(60, 30, 10, 0.4));
    /* 薄くする */
    z-index: 0;
    /* 最背面に */
}

body.dark-theme .hero::before {
    background: linear-gradient(rgba(26, 20, 16, 0.5), rgba(45, 36, 25, 0.5));
}

.hero-content {
    position: relative;
    z-index: 5;
    /* 湯気より下 */
    max-width: 750px;
}

.social-proof {
    margin-bottom: 20px;
    padding: 12px 28px;
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(10px);
    border-radius: 50px;
    display: inline-block;
    color: #fff;
    font-weight: 700;
    font-size: 1.1rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    animation: fadeInDown 0.8s ease-out;
}

.proof-icon {
    margin-right: 8px;
    font-size: 1.3rem;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

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

.main-catchcopy {
    font-size: 3rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 0.3em;
    text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.5);
    line-height: 1.3;
    animation: fadeInUp 1s ease-out 0.2s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

.sub-catchcopy {
    font-size: 1.8rem;
    font-weight: 700;
    color: #fefae0;
    margin-bottom: 1em;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.4);
    animation: fadeInUp 1s ease-out 0.4s both;
}

.limited-offer {
    margin-bottom: 1.5em;
    padding: 10px 20px;
    background: linear-gradient(135deg, #ff6b6b, #ff8e53);
    border-radius: 30px;
    display: inline-block;
    color: #fff;
    font-size: 1rem;
    font-weight: 700;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
    animation: pulse 2s ease-in-out infinite, fadeInUp 1s ease-out 0.6s both;
}

@keyframes pulse {

    0%,
    100% {
        box-shadow: 0 0 10px rgba(255, 107, 107, 0.5);
    }

    50% {
        box-shadow: 0 0 20px rgba(255, 107, 107, 0.8);
    }
}

.hero-intro {
    font-size: 1.2rem;
    color: #fff;
    margin-bottom: 2em;
    font-weight: 500;
    animation: fadeInUp 1s ease-out 0.8s both;
}

.hero-cta {
    display: flex;
    flex-direction: column;
    gap: 15px;
    align-items: center;
    animation: fadeInUp 1s ease-out 1s both;
}

/* ===== 音楽プレーヤーセクション ===== */
.music-player-section {
    background: var(--bg-secondary);
}

.player-intro {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2.5em;
}

.music-player {
    max-width: 700px;
    margin: 0 auto;
    background: var(--player-bg);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 8px 30px var(--shadow-color);
    display: flex;
    flex-direction: column;
    gap: 25px;
    border: 1px solid var(--border-color);
}

.player-artwork {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.artwork-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.play-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.3s ease;
    cursor: pointer;
}

.play-overlay:hover {
    background: rgba(0, 0, 0, 0.7);
}

.play-btn-large {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.play-btn-large:hover {
    transform: scale(1.1);
}

.play-icon-large {
    font-size: 2rem;
    color: var(--accent-secondary);
    margin-left: 5px;
}

.player-controls {
    flex: 1;
}

.track-info {
    text-align: center;
    margin-bottom: 20px;
}

.track-title {
    font-size: 1.5rem;
    color: var(--heading-color);
    margin-bottom: 0.3em;
}

.track-artist {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 0;
}

.progress-container {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.time-current,
.time-total {
    font-size: 0.9rem;
    color: var(--text-secondary);
    min-width: 35px;
}

.progress-bar {
    flex: 1;
    height: 6px;
    background: var(--bg-secondary);
    border-radius: 3px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 3px;
    transition: width 0.1s ease;
}

.control-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 15px;
}

.control-btn {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--accent-primary);
    border: none;
    color: #fff;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.control-btn:hover {
    background: var(--accent-secondary);
    transform: scale(1.1);
}

.control-btn:focus {
    outline: 3px solid var(--accent-primary);
    outline-offset: 3px;
}

.volume-slider {
    width: 100px;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-secondary);
    border-radius: 3px;
    outline: none;
}

.volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-primary);
    cursor: pointer;
}

.volume-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-primary);
    cursor: pointer;
    border: none;
}

.player-note {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 10px;
    margin-bottom: 0;
}

/* ===== イントロダクション ===== */
#intro .intro-container {
    max-width: 800px;
    text-align: center;
}

#intro h2 {
    font-size: 1.8rem;
    font-weight: 700;
}

#intro p {
    font-size: 1.1rem;
}

/* ===== 楽曲の魅力セクション ===== */
.features-list {
    margin-top: 50px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.feature-item {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 10px var(--shadow-color);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px var(--shadow-color);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.feature-item h3 {
    font-size: 1.4rem;
    margin-bottom: 0.8em;
}

.feature-item p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 0;
}

/* ===== リスナーの声セクション ===== */
.review-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.review-card {
    background: var(--bg-card);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 10px var(--shadow-color);
    border-left: 4px solid var(--accent-primary);
    transition: transform 0.3s ease;
}

.review-card:hover {
    transform: translateY(-3px);
}

.review-card p {
    font-size: 1rem;
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.review-card cite {
    font-style: normal;
    color: var(--heading-color);
    font-weight: 700;
    font-size: 0.9rem;
}

/* ===== MV紹介セクション ===== */
#mv .mv-container {
    text-align: center;
}

#mv h2 {
    margin-bottom: 0.8em;
}

#mv p {
    margin-bottom: 2em;
    font-size: 1.1rem;
}

.mv-embed {
    position: relative;
    width: 100%;
    max-width: 640px;
    margin: 30px auto 0;
    padding-top: 56.25%;
    overflow: hidden;
    border-radius: 12px;
    box-shadow: 0 8px 20px var(--shadow-color);
    background: linear-gradient(135deg, #a45c3a 0%, #d35400 100%);
}

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

.video-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(164, 92, 58, 0.9), rgba(211, 84, 0, 0.9));
    cursor: pointer;
    transition: background 0.3s ease;
}

.video-placeholder:hover {
    background: linear-gradient(135deg, rgba(164, 92, 58, 1), rgba(211, 84, 0, 1));
}

.play-button {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease, background 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.play-button:hover {
    transform: scale(1.1);
    background: #fff;
}

.play-button:focus {
    outline: 3px solid #fff;
    outline-offset: 5px;
}

.play-icon {
    font-size: 2rem;
    color: #d35400;
    margin-left: 5px;
}

.video-hint {
    margin-top: 20px;
    color: #fff;
    font-size: 1rem;
    font-weight: 700;
}

/* ===== FAQセクション ===== */
.faq-list {
    max-width: 700px;
    margin: 30px auto 0;
}

.faq-item {
    background: var(--bg-card);
    padding: 20px;
    margin-bottom: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 8px var(--shadow-color);
    border-left: 4px solid var(--accent-primary);
}

.faq-item summary {
    font-weight: 700;
    color: var(--heading-color);
    cursor: pointer;
    font-size: 1.1rem;
    padding: 10px 0;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--accent-primary);
    transition: transform 0.3s ease;
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
}

.faq-item summary:hover {
    color: var(--accent-secondary);
}

.faq-item summary:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
    border-radius: 4px;
}

.faq-item p {
    margin-top: 15px;
    margin-bottom: 0;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== シェアセクション（インライン） ===== */
.share-container {
    text-align: center;
}

.share-intro {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2em;
}

.share-buttons-inline {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin-top: 30px;
}

.share-btn-inline {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    border-radius: 50px;
    color: #fff;
    font-weight: 700;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    text-decoration: none;
    border: none;
    cursor: pointer;
}

.share-btn-inline:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
    text-decoration: none;
}

.share-btn-inline.twitter {
    background: #000;
}

.share-btn-inline.facebook {
    background: #1877f2;
}

.share-btn-inline.line {
    background: #00B900;
}

.share-btn-inline.copy {
    background: #6c757d;
}

/* ===== CTAセクション ===== */
#cta .cta-container {
    text-align: center;
}

#cta h2 {
    margin-bottom: 0.5em;
}

.cta-description {
    font-size: 1.2rem;
    color: var(--heading-color);
    font-weight: 700;
    margin-bottom: 1.5em;
}

.cta-buttons {
    margin-top: 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.cta-button {
    display: inline-block;
    padding: 15px 40px;
    border-radius: 50px;
    font-size: 1.2rem;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    min-width: 320px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.cta-button:hover::before {
    width: 300px;
    height: 300px;
}

.cta-button:hover {
    transform: translateY(-3px) scale(1.02);
    text-decoration: none;
    opacity: 1;
}

.cta-button:active {
    transform: translateY(-1px) scale(0.98);
}

.cta-button:focus {
    outline: 3px solid var(--accent-primary);
    outline-offset: 4px;
}

.cta-button.primary {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: #fff;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1), 0 0 20px rgba(230, 126, 34, 0.3);
    animation: ctaPulse 2s ease-in-out infinite;
}

@keyframes ctaPulse {

    0%,
    100% {
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1), 0 0 20px rgba(230, 126, 34, 0.3);
    }

    50% {
        box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15), 0 0 30px rgba(230, 126, 34, 0.5);
    }
}

.cta-button.primary:hover {
    background: linear-gradient(135deg, var(--accent-secondary) 0%, #c44d00 100%);
    color: #fff;
}

.cta-button.secondary {
    background: var(--bg-card);
    color: var(--accent-primary);
    border: 2px solid var(--accent-primary);
    padding-top: 13px;
    padding-bottom: 13px;
    box-shadow: 0 4px 8px var(--shadow-color);
}

.cta-button.secondary:hover {
    background: var(--bg-secondary);
    color: var(--accent-secondary);
    border-color: var(--accent-secondary);
    box-shadow: 0 6px 12px var(--shadow-color);
}

.cta-button.large {
    padding: 18px 50px;
    font-size: 1.3rem;
    min-width: 350px;
}

.cta-button.secondary.large {
    padding-top: 16px;
    padding-bottom: 16px;
}

/* ===== フッター ===== */
.footer {
    background-color: #d4a373;
    color: #fff;
    padding: 60px 0 40px;
    text-align: center;
    font-size: 0.95rem;
}

.dark-theme .footer {
    background-color: #3d2f23;
}

.footer h2 {
    font-size: 1.8rem;
    color: #fff;
    margin-bottom: 1.5em;
    background: none;
    -webkit-text-fill-color: #fff;
}

.footer h3 {
    font-size: 1.3rem;
    color: #fefae0;
    margin-top: 2.5em;
    margin-bottom: 1em;
    font-weight: 700;
}

.artist-profile {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    margin-bottom: 2em;
    text-align: center;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
    color: #fefae0;
}

.artist-image-wrapper {
    flex-shrink: 0;
}

.artist-image {
    width: 130px;
    height: 130px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid #fff;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.artist-details p {
    margin-bottom: 0.8em;
    line-height: 1.6;
    font-weight: 500;
}

.artist-details p strong {
    color: #fff;
    font-weight: 700;
}

.artist-details a {
    color: #fff;
    font-weight: 700;
    text-decoration: underline;
}

.artist-details a:hover {
    color: #fefae0;
    opacity: 1;
}

.footer-links {
    margin-bottom: 30px;
}

.footer-links li {
    display: inline-block;
    margin: 0 15px 10px;
}

.footer-links a {
    color: #fff;
    font-weight: 700;
    font-size: 1.05rem;
}

.footer-links a:hover {
    color: #fefae0;
    text-decoration: underline;
    opacity: 1;
}

.artist-message {
    max-width: 700px;
    margin: 40px auto;
    padding: 30px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.artist-message h3 {
    margin-top: 0;
    color: #fff;
}

.artist-message p {
    color: #fefae0;
    line-height: 1.8;
    margin-bottom: 0;
}

.footer-notes {
    margin-top: 40px;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.8);
}

.footer-notes p {
    margin-bottom: 0.5em;
    font-family: sans-serif;
    font-weight: 400;
}

.copyright {
    margin-top: 1em;
}

/* ===== レスポンシブ対応 ===== */
@media (max-width: 768px) {
    h1.main-catchcopy {
        font-size: 2.2rem;
    }

    .sub-catchcopy {
        font-size: 1.4rem;
    }

    h2 {
        font-size: 1.8rem;
    }

    h3 {
        font-size: 1.3rem;
    }

    .content-section {
        padding: 50px 0;
    }

    .hero-cta {
        gap: 15px;
    }

    .cta-button {
        padding: 12px 30px;
        font-size: 1.1rem;
        min-width: 280px;
    }

    .cta-button.large {
        padding: 15px 40px;
        font-size: 1.2rem;
        min-width: 300px;
    }

    .cta-button.secondary {
        padding-top: 10px;
        padding-bottom: 10px;
    }

    .cta-button.secondary.large {
        padding-top: 13px;
        padding-bottom: 13px;
    }

    .mv-embed {
        max-width: 90%;
    }

    .footer h2 {
        font-size: 1.6rem;
    }

    .footer h3 {
        font-size: 1.2rem;
    }

    .footer-links li {
        display: block;
        margin: 0 0 12px;
    }

    .steam01,
    .steam02,
    .steam03 {
        width: 60%;
    }

    .steam02 {
        width: 50%;
    }

    .steam03 {
        width: 65%;
    }

    .social-proof {
        font-size: 1rem;
        padding: 10px 24px;
    }

    .limited-offer {
        font-size: 0.9rem;
    }

    .hero {
        background-attachment: scroll;
    }

    .theme-toggle {
        width: 45px;
        height: 45px;
        top: 15px;
        right: 15px;
        font-size: 1.3rem;
    }

    .share-buttons-float {
        bottom: 20px;
        right: 20px;
    }

    .share-toggle {
        width: 55px;
        height: 55px;
        font-size: 1.6rem;
    }

    .music-player {
        padding: 20px;
    }

    .player-artwork {
        width: 150px;
        height: 150px;
    }

    .share-buttons-inline {
        flex-direction: column;
        align-items: stretch;
    }

    .share-btn-inline {
        justify-content: center;
    }
}

@media (min-width: 769px) {
    .hero-cta {
        flex-direction: row;
        justify-content: center;
        gap: 25px;
    }

    .cta-buttons {
        flex-direction: row;
        justify-content: center;
        gap: 30px;
    }

    .artist-profile {
        flex-direction: row;
        text-align: left;
        gap: 40px;
        align-items: flex-start;
    }

    .artist-details {
        text-align: left;
    }

    .music-player {
        flex-direction: row;
        align-items: center;
    }

    .player-artwork {
        flex-shrink: 0;
    }
}

/* ===== アクセシビリティ強化 ===== */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* フォーカス表示の強化 */
button:focus-visible,
a:focus-visible,
summary:focus-visible,
input:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 3px;
}

/* ダークモードでのコントラスト調整 */
.dark-theme .review-card,
.dark-theme .feature-item,
.dark-theme .faq-item {
    background: rgba(61, 47, 35, 0.9);
    border-color: rgba(230, 126, 34, 0.3);
}

.dark-theme .music-player {
    background: rgba(45, 36, 25, 0.95);
}

.dark-theme .progress-bar,
.dark-theme .volume-slider {
    background: rgba(254, 250, 224, 0.1);
}

/* スクロールバーのカスタマイズ（オプション） */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-secondary);
}

/* ===== 湯気アニメーション（完成版） ===== */

/* アニメーション定義 */
@keyframes steam01 {
    0% {
        bottom: -80%;
        filter: blur(16px);
        transform: rotateY(0deg) scale(0.6, 1);
        opacity: 0;
    }

    11% {
        opacity: 0.15;
        /* 改善済み */
    }

    33% {
        transform: rotateY(40deg) scale(1, 1.4);
        opacity: 0.5;
        /* 改善済み */
    }

    66% {
        transform: rotateY(10deg) scale(1.8, 1);
        opacity: 0.4;
        /* 改善済み */
    }

    100% {
        bottom: 10%;
        filter: blur(20px);
        transform: rotateY(60deg) scale(2, 1.8);
        opacity: 0;
    }
}

@keyframes steam02 {
    0% {
        bottom: -60%;
        filter: blur(16px);
        transform: rotateY(0deg) scale(0.6, 0.6);
        opacity: 0;
    }

    11% {
        opacity: 0.15;
        /* 改善済み */
    }

    33% {
        transform: rotateY(40deg) scale(0.8, 1);
        opacity: 0.45;
        /* 改善済み */
    }

    66% {
        transform: rotateY(2deg) scale(1, 1.2);
        opacity: 0.35;
    }

    100% {
        bottom: 5%;
        filter: blur(20px);
        transform: rotateY(50deg) scale(1.2, 1.4);
        opacity: 0;
    }
}

/* 湯気コンテナ */
.steamBox {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    /* 最前面に */
    pointer-events: none;
}

/* 湯気要素の配置 */
.steam01,
.steam02,
.steam03 {
    position: absolute;
    opacity: 0;
    bottom: 0;
    width: 40%;
    max-width: 532px;
}

.steam01 {
    right: 5%;
    animation: steam01 10s infinite linear;
}

.steam02 {
    left: 5%;
    width: 30%;
    max-width: 399px;
    animation: steam02 14s infinite linear;
}

.steam03 {
    left: 50%;
    transform: translateX(-50%);
    width: 45%;
    max-width: 532px;
    animation: steam02 12s infinite linear;
    animation-delay: 6s;
}

/* ===== テーマ別スタイル ===== */

/* ライトテーマ用 */
.light-theme .steam01 img,
.light-theme .steam02 img,
.light-theme .steam03 img {
    width: 100%;
    height: auto;
    display: block;
    filter: brightness(1.2) contrast(1.1);
    opacity: 0.6;
}

/* ダークテーマ用（視認性強化） */
.dark-theme .steam01 img,
.dark-theme .steam02 img,
.dark-theme .steam03 img {
    width: 100%;
    height: auto;
    display: block;
    /* 明るさ3倍 + コントラスト強化 + 発光効果 */
    filter: brightness(3) contrast(1.5) drop-shadow(0 0 20px rgba(255, 255, 255, 0.8));
    opacity: 0.85;
    /* スクリーンモードで発光させる */
    mix-blend-mode: screen;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {

    .steam01,
    .steam02,
    .steam03 {
        width: 60%;
    }

    .steam02 {
        width: 50%;
    }

    .steam03 {
        width: 65%;
    }
}