:root {
    --background: #151515;
    --text-main: #F5F5F5;
    --text-body: #D0D0D0;
    --text-muted: #D0D0D0;
    --text-subtle: #888888;
    --accent-gold: #B89F5D;
    --brand-gold: #C5A059;
    --border-color: #333333;
    --surface-dark: rgba(9, 9, 9, 0.65);
    --surface-card: rgba(14, 14, 14, 0.6);
    --glow: rgba(184, 159, 93, 0.55);
    --glass-bg: rgba(8, 8, 8, 0.62);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 25px 65px rgba(0, 0, 0, 0.55);
    --glass-blur: 16px;
}

/* Brand Gold Utility Classes */
.text-brand-gold {
    color: var(--brand-gold);
}

.bg-brand-gold {
    background-color: var(--brand-gold);
}

.border-brand-gold {
    border-color: var(--brand-gold);
}
body {
    min-height: 100vh;
    margin: 0;
    background-color: #0d0d0d;
    background-image:
        radial-gradient(circle at 20% 20%, rgba(184, 159, 93, 0.12), transparent 45%),
        radial-gradient(circle at 80% 0%, rgba(255, 255, 255, 0.08), transparent 50%),
        linear-gradient(180deg, #070707 0%, #121212 35%, #0b0b0b 100%);
    color: var(--text-body);
    font-family: 'Noto Serif JP', serif;
    font-weight: 400;
    letter-spacing: 0.04em;
    position: relative;
    isolation: isolate;
    line-height: 1.85;
    /* スムーススクロール */
    scroll-behavior: smooth;
    /* スクロールバーのスタイリング */
    scrollbar-width: thin;
    scrollbar-color: rgba(184, 159, 93, 0.3) transparent;
}

/* Webkit系ブラウザのスクロールバー */
body::-webkit-scrollbar {
    width: 8px;
}

body::-webkit-scrollbar-track {
    background: transparent;
}

body::-webkit-scrollbar-thumb {
    background: rgba(184, 159, 93, 0.3);
    border-radius: 4px;
}

body::-webkit-scrollbar-thumb:hover {
    background: rgba(184, 159, 93, 0.5);
}

body::after {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(135deg, rgba(255,255,255,0.02) 25%, transparent 25%, transparent 50%, rgba(255,255,255,0.02) 50%, rgba(255,255,255,0.02) 75%, transparent 75%, transparent),
        linear-gradient(135deg, rgba(255,255,255,0.015) 25%, transparent 25%, transparent 50%, rgba(255,255,255,0.015) 50%, rgba(255,255,255,0.015) 75%, transparent 75%, transparent);
    background-size: 120px 120px, 60px 60px;
    opacity: 0.2;
    mix-blend-mode: screen;
    z-index: 0;
}

body.no-scroll,
body.is-loader-active {
    overflow: hidden;
}
h1, h2, h3, h4, h5, h6,
.font-serif-jp,
.font-serif-en {
    color: var(--text-main);
}

p,
li,
.text-muted {
    color: var(--text-body);
    line-height: 1.85;
}

.text-subtle {
    color: var(--text-subtle);
}

.meta-label,
.article-tag,
.journal-carousel-card__date,
.journal-carousel-title-label {
    color: var(--text-subtle);
}

.article-tags {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.article-tag {
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 999px;
    font-size: 0.65rem;
    letter-spacing: 0.25em;
    padding: 0.2rem 0.75rem;
    text-transform: uppercase;
}

.section {
    width: 100%;
    padding: clamp(4rem, 7vw, 7.5rem) 1.5rem;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    isolation: isolate;
}
@media (min-width: 768px) {
    .section {
        padding: clamp(5rem, 8vw, 8.5rem) 4rem;
    }
}
.section + .section {
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    margin-top: clamp(3rem, 6vw, 7.5rem);
}
.section-content {
    max-width: 1200px;
    width: 100%;
    z-index: 1;
    padding: clamp(2rem, 4vw, 4rem);
}

:where(
    .section-content,
    .glass-panel,
    .flow-card,
    .process-card,
    .material-card,
    .signature-card,
    .stat-card,
    .lounge-card,
    .lounge-chip,
    .journal-feature
) {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--glass-radius, 28px);
    box-shadow: var(--glass-shadow);
    backdrop-filter: blur(var(--glass-blur));
    position: relative;
    overflow: hidden;
}
:where(
    .section-content,
    .glass-panel,
    .flow-card,
    .process-card,
    .material-card,
    .signature-card,
    .stat-card,
    .lounge-card,
    .lounge-chip,
    .journal-feature
)::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.08), transparent 55%);
    opacity: 0.25;
    pointer-events: none;
    mix-blend-mode: screen;
}
.section-content[data-surface="plain"],
.glass-panel[data-surface="plain"] {
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    backdrop-filter: none !important;
    padding: 0;
}
.section-content[data-surface="hero"] {
    background: rgba(5, 5, 5, 0.55);
    border: 1px solid rgba(255,255,255,0.15);
    box-shadow: 0 30px 80px rgba(0,0,0,0.65);
    backdrop-filter: none;
    --glass-radius: 34px;
}
.section-content[data-surface="hero"]::after {
    background: linear-gradient(120deg, rgba(255,255,255,0.18), transparent 60%);
    opacity: 0.35;
}
.section-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
    opacity: 0.12;
}
.gallery-container {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    gap: 1.5rem;
    padding: 2rem 0;
    -ms-overflow-style: none;
    scrollbar-width: none;
    cursor: grab;
}
.gallery-container:active { cursor: grabbing; }
.gallery-container::-webkit-scrollbar { display: none; }
.gallery-item {
    flex: 0 0 60%;
    scroll-snap-align: center;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
}
@media (min-width: 768px) { .gallery-item { flex-basis: 40%; } }
.gallery-item img,
.gallery-item picture {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Cursor + transition */
#page-transition {
    position: fixed;
    inset: 0;
    background: rgba(6, 6, 6, 0.75);
    border: 1px solid rgba(255,255,255,0.06);
    backdrop-filter: blur(18px);
    box-shadow: 0 25px 65px rgba(0,0,0,0.65);
    border-radius: 32px;
    z-index: 9000;
    pointer-events: none;
    opacity: 0;
    transform: scale(0.92);
    transition: opacity 0.55s ease, transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(1rem, 6vw, 3.5rem);
    overflow: hidden;
}
#page-transition::before,
#page-transition::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    pointer-events: none;
}
#page-transition::before {
    border: 1px solid rgba(255,255,255,0.12);
    opacity: 0.6;
}
#page-transition::after {
    background: radial-gradient(circle at 20% 20%, rgba(255,255,255,0.18), transparent 55%);
    opacity: 0.45;
}
#page-transition.is-active {
    opacity: 1;
    transform: scale(1);
    pointer-events: auto;
}
#page-transition .transition-panel {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
    z-index: 1;
}
#page-transition .transition-panel__glass,
#page-transition .transition-panel__glare {
    position: absolute;
    inset: -8%;
    border-radius: clamp(1.5rem, 5vw, 3.5rem);
    opacity: 0;
    transform: translateY(-110%);
}
#page-transition .transition-panel__glass {
    background:
        linear-gradient(135deg, rgba(255,255,255,0.16), rgba(255,255,255,0.02)) ,
        rgba(4,4,4,0.9);
    border: 1px solid rgba(255,255,255,0.08);
    box-shadow:
        0 35px 80px rgba(0,0,0,0.65),
        inset 0 0 30px rgba(255,255,255,0.04);
    backdrop-filter: blur(24px);
}
#page-transition .transition-panel__glare {
    background: radial-gradient(circle at 70% 20%, rgba(255,255,255,0.26), transparent 60%);
    filter: blur(12px);
    mix-blend-mode: screen;
    pointer-events: none;
}
#page-transition.is-covering .transition-panel__glass,
#page-transition.is-covering .transition-panel__glare,
#page-transition.is-revealing .transition-panel__glass,
#page-transition.is-revealing .transition-panel__glare,
html.route-transition-pending #page-transition .transition-panel__glass,
html.route-transition-pending #page-transition .transition-panel__glare {
    opacity: 1;
}
#page-transition.is-covering .transition-panel__glass {
    animation: routePanelCover 0.95s cubic-bezier(0.77, 0, 0.18, 1) forwards;
}
#page-transition.is-covering .transition-panel__glare {
    animation: routePanelCover 0.9s cubic-bezier(0.77, 0, 0.18, 1) forwards 0.05s;
}
#page-transition.is-revealing .transition-panel__glass {
    animation: routePanelReveal 1s cubic-bezier(0.77, 0, 0.18, 1) forwards;
}
#page-transition.is-revealing .transition-panel__glare {
    animation: routePanelReveal 0.95s cubic-bezier(0.77, 0, 0.18, 1) forwards;
}
html.route-transition-pending #page-transition {
    opacity: 1;
    pointer-events: auto;
    transform: none;
}
html.route-transition-pending body {
    overflow: hidden;
}
html.route-transition-pending #page-transition .transition-panel__glass,
html.route-transition-pending #page-transition .transition-panel__glare {
    transform: translateY(0);
}
@keyframes routePanelCover {
    0% {
        transform: translateY(-110%);
    }
    100% {
        transform: translateY(0%);
    }
}
@keyframes routePanelReveal {
    0% {
        transform: translateY(0%);
    }
    100% {
        transform: translateY(-110%);
    }
}
@media (prefers-reduced-motion: reduce) {
    #page-transition .transition-panel__glass,
    #page-transition .transition-panel__glare {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition: none !important;
    }
}

/* Global loader (disabled) */
.cursor-dot,
.cursor-ring {
    position: fixed;
    top: 0;
    left: 0;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    pointer-events: none;
    z-index: 9001;
    transform: translate(-50%, -50%);
    transition: background 0.3s ease, opacity 0.3s ease;
}
.cursor-dot {
    background: var(--accent-gold);
}
.cursor-ring {
    width: 42px;
    height: 42px;
    border: 1px solid rgba(255,255,255,0.35);
    background: rgba(184,159,93,0.08);
    transition: border 0.3s ease, width 0.2s ease, height 0.2s ease, opacity 0.3s ease;
}
body.is-touch .cursor-dot,
body.is-touch .cursor-ring {
    display: none;
}

/* Reveal animations */
[data-animate] {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
    /* パフォーマンス最適化 */
    will-change: opacity, transform;
}

[data-animate].is-visible {
    opacity: 1;
    transform: none;
    will-change: auto; /* アニメーション完了後はwill-changeを削除 */
}

/* モバイルでのアニメーション軽量化 */
@media (max-width: 768px) {
    [data-animate] {
        transform: translateY(16px); /* モバイルでは移動距離を減らす */
        transition: opacity 0.4s ease, transform 0.4s ease; /* アニメーション時間を短縮 */
    }
    
    /* タッチデバイスでのアニメーション最適化 */
    @media (hover: none) and (pointer: coarse) {
        [data-animate] {
            transition: opacity 0.3s ease, transform 0.3s ease; /* さらに短縮 */
        }
    }
}
.cursor-ring.is-link {
    width: 60px;
    height: 60px;
    border-color: var(--accent-gold);
    background: rgba(184,159,93,0.12);
}
/* Reveal animations */
[data-animate] {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-animate].is-visible {
    opacity: 1;
    transform: none;
}

.section-kicker {
    font-size: 0.85rem;
    letter-spacing: 0.35em;
    text-transform: uppercase;
    color: rgba(245, 245, 245, 0.85);
    font-weight: 600;
}
.section-header {
    margin-bottom: 2.5rem;
    text-align: left;
}
.section-header.text-center { text-align: center; }
.section-header h2 { margin-top: 0.5rem; }
.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.95rem 2.75rem;
    border-radius: 999px;
    letter-spacing: 0.3em;
    font-size: 0.8rem;
    text-transform: uppercase;
    font-weight: 600;
    min-height: 56px;
    border: 1px solid transparent;
    transition: transform 0.35s ease, box-shadow 0.35s ease, color 0.35s ease, border-color 0.35s ease;
    overflow: hidden;
}
.btn::after {
    content: '';
    position: absolute;
    inset: -30%;
    background: radial-gradient(circle at top, rgba(255,255,255,0.35), transparent 60%);
    opacity: 0;
    transform: scale(0.6);
    transition: opacity 0.4s ease, transform 0.4s ease;
    pointer-events: none;
}
.btn:hover::after {
    opacity: 0.35;
    transform: scale(1);
}
.btn:focus-visible {
    outline: 2px solid var(--accent-gold);
    outline-offset: 4px;
}
.btn-primary {
    background: linear-gradient(125deg, #f9dfa3, #cda45a);
    color: #000000;
    box-shadow: 0 22px 45px rgba(205, 164, 90, 0.45);
}
.btn-primary:hover {
    transform: translateY(-3px);
    background: linear-gradient(125deg, #f2ce7c, #d4b070);
    color: #000000;
}
.btn-secondary {
    border-color: rgba(255,255,255,0.35);
    color: var(--text-main);
    background: rgba(255,255,255,0.05);
}
.btn-secondary:hover {
    border-color: var(--accent-gold);
    color: var(--accent-gold);
    transform: translateY(-3px);
}
.btn-ghost {
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: var(--text-main);
    background: rgba(255,255,255,0.02);
}
.btn-compact {
    padding: 0.6rem 1.6rem;
    font-size: 0.7rem;
    letter-spacing: 0.25em;
}
.btn-ghost:hover {
    border-color: var(--accent-gold);
    color: var(--accent-gold);
    transform: translateY(-3px);
}
.link-pills {
    margin-top: 2rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}
.link-pills a {
    border: 1px solid rgba(255,255,255,0.25);
    padding: 0.9rem 2.2rem;
    border-radius: 999px;
    letter-spacing: 0.3em;
    font-size: 0.75rem;
    text-transform: uppercase;
    transition: all 0.3s ease;
}
.link-pills a:hover { border-color: var(--accent-gold); color: var(--accent-gold); }

.journal-carousel-header {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}
@media (min-width: 1024px) {
    .journal-carousel-header {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-end;
        gap: 2rem;
    }
}
.journal-carousel-header h2 {
    font-size: clamp(2.5rem, 4vw, 3.75rem);
    color: var(--text-main);
    margin-top: 0.3rem;
}
.journal-carousel-header p {
    max-width: 640px;
    color: var(--text-body);
    line-height: 1.8;
}
.journal-carousel-controls,
.journal-carousel-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
}
.journal-carousel-container {
    position: relative;
    margin-top: 2.5rem;
    padding: clamp(1.5rem, 4vw, 2.75rem);
    border-radius: 36px;
    background: rgba(8, 8, 8, 0.55);
    border: 1px solid rgba(255,255,255,0.08);
    box-shadow: 0 35px 85px rgba(0,0,0,0.55);
    backdrop-filter: blur(18px);
    overflow: hidden;
}
.journal-carousel-container::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    border: 1px solid rgba(255,255,255,0.08);
    opacity: 0.6;
    pointer-events: none;
}
.journal-carousel-container::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 120px;
    height: 100%;
    background: linear-gradient(270deg, rgba(7,7,7,0.88), rgba(7,7,7,0));
    pointer-events: none;
}
.journal-nav-btn {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.08);
    color: var(--text-main);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: transform 0.3s ease, border-color 0.3s ease, color 0.3s ease, background 0.3s ease;
    box-shadow: 0 18px 35px rgba(0,0,0,0.35);
}
.journal-nav-btn:hover {
    border-color: rgba(255,255,255,0.4);
    background: rgba(255,255,255,0.25);
    color: #050505;
    transform: translateY(-2px);
}
.journal-nav-btn:disabled {
    opacity: 0.35;
    pointer-events: none;
}
.journal-carousel {
    display: flex;
    gap: 1.5rem;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: 1rem;
    -ms-overflow-style: none;
    scrollbar-width: none;
}
.journal-carousel::-webkit-scrollbar { display: none; }
.journal-carousel-card {
    --glass-radius: 26px;
    flex: 0 0 85%;
    min-width: 260px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    scroll-snap-align: start;
    padding: clamp(1.5rem, 3vw, 2.5rem);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--glass-radius);
    box-shadow: var(--glass-shadow);
    backdrop-filter: blur(var(--glass-blur));
    min-height: 320px;
    position: relative;
    transition: transform 0.35s ease, box-shadow 0.35s ease;
}
.journal-carousel-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    border: 1px solid rgba(255,255,255,0.05);
    pointer-events: none;
}
.journal-carousel-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 20%, rgba(184,159,93,0.15), transparent 60%);
    opacity: 0;
    transition: opacity 0.35s ease;
    pointer-events: none;
}
.journal-carousel-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 30px 60px rgba(0,0,0,0.45), var(--glass-shadow);
}
.journal-carousel-card:hover::after {
    opacity: 1;
}
.journal-carousel-card__meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.75rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
}
.journal-carousel-card__title {
    font-size: 1.5rem;
    color: var(--text-main);
    margin: 0;
    line-height: 1.4;
}
.journal-carousel-card__excerpt {
    color: var(--text-body);
    line-height: 1.8;
    flex-grow: 1;
}
.journal-carousel-card__cta {
    font-size: 0.75rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--accent-gold);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}
.journal-carousel-card__label {
    font-size: 0.7rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--text-subtle);
}
@media (min-width: 1024px) {
    .journal-carousel-container::after {
        display: none;
    }
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    list-style: none;
    padding: 0;
    margin: 0;
}
.process-card {
    --glass-radius: 20px;
    padding: 1.5rem;
    min-height: 220px;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}
.process-step {
    font-size: 0.75rem;
    letter-spacing: 0.4em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.6);
}
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}
.faq-item {
    padding: 0;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    background: transparent;
}
.faq-item h3 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}
.faq-item p {
    margin: 0;
    color: var(--text-muted);
    line-height: 1.8;
}

.invitation-cta {
    position: relative;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
}
.invitation-options {
    display: none;
    flex-direction: column;
    gap: 1rem;
    width: min(400px, 90vw);
    padding: 1.5rem;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    background: rgba(8,8,8,0.8);
    box-shadow: 0 30px 60px rgba(0,0,0,0.55);
}
.invitation-options.is-visible {
    display: flex;
}
.invitation-option {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
.invitation-label {
    margin: 0;
    letter-spacing: 0.25em;
    font-size: 0.75rem;
    color: rgba(234,234,234,0.75);
    text-transform: uppercase;
}

/* Lounge */
.lounge-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
    background: rgba(7, 7, 7, 0.35);
    border-radius: 32px;
    padding: clamp(2rem, 4vw, 3.5rem);
}
@media (min-width: 1024px) {
    .lounge-grid {
        grid-template-columns: 1.05fr 0.95fr;
        align-items: stretch;
    }
}
.lounge-copy {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}
.lounge-facts {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}
.lounge-facts li {
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.lounge-facts strong {
    display: block;
    font-size: 1.05rem;
    letter-spacing: 0.08em;
    color: var(--text-main);
    margin-bottom: 0.4rem;
}
.lounge-facts span {
    color: var(--text-muted);
    line-height: 1.8;
}
.lounge-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}
.lounge-gallery {
    display: grid;
    gap: 1.5rem;
}
.lounge-card {
    --glass-radius: 24px;
}
.lounge-card.main img {
    width: 100%;
    height: 280px;
    object-fit: cover;
    display: block;
}
.lounge-card figcaption {
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}
.lounge-card figcaption .label {
    font-size: 0.75rem;
    letter-spacing: 0.4em;
    color: rgba(234,234,234,0.6);
    text-transform: uppercase;
}
.lounge-card h3 {
    font-size: 1.4rem;
    margin: 0;
    color: var(--text-main);
}
.lounge-card p {
    margin: 0;
    color: var(--text-muted);
    line-height: 1.7;
}
.lounge-stack {
    display: grid;
    gap: 1rem;
}
.lounge-chip {
    --glass-radius: 20px;
    padding: 1.5rem;
}
.lounge-chip.light {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(184, 159, 93, 0.25);
}
.lounge-chip .label {
    font-size: 0.75rem;
    letter-spacing: 0.35em;
    text-transform: uppercase;
    color: rgba(234,234,234,0.6);
}
.lounge-chip h4 {
    margin: 0.75rem 0 0.15rem;
    font-size: 1.1rem;
}
.lounge-chip span,
.lounge-chip ul {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0;
    padding-left: 1.2rem;
}
.lounge-chip ul { list-style: square; }

/* Hero */
.section--hero {
    position: relative;
    min-height: 100vh;
    padding: 0;
    overflow: hidden;
}
.hero-video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: saturate(0.85) brightness(0.85);
    z-index: 0;
    /* パフォーマンス最適化 */
    will-change: opacity;
    transform: translateZ(0); /* GPU アクセラレーション */
}

/* モバイルでの動画最適化 */
@media (max-width: 768px) {
    .hero-video {
        /* モバイルでは動画の品質を下げる（必要に応じて） */
        object-position: center;
    }
    
    /* モバイルでの動画読み込み最適化 */
    .hero-video[poster] {
        background-size: cover;
        background-position: center;
    }
}
.hero-frame {
    position: relative;
    z-index: 1;
    padding: min(15vh, 8rem) clamp(1.5rem, 5vw, 5rem);
    max-width: 900px;
}
.section--hero .section-content {
    background: none;
    border: none;
    box-shadow: none;
}
.hero-cta {
    margin-top: 2rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}
.hero-scroll {
    margin-top: 3rem;
    letter-spacing: 0.5em;
    font-size: 0.75rem;
    text-transform: uppercase;
    color: rgba(255,255,255,0.7);
    position: relative;
}
.hero-scroll::after {
    content: '';
    display: block;
    width: 1px;
    height: 60px;
    margin: 0.75rem auto 0;
    background: linear-gradient(180deg, transparent, rgba(255,255,255,0.8));
    animation: scrollHint 1.8s ease-in-out infinite;
}
@keyframes scrollHint {
    0% { transform: translateY(-6px); opacity: 0; }
    50% { opacity: 1; }
    100% { transform: translateY(8px); opacity: 0; }
}

/* Philosophy */
.philosophy-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}
@media (min-width: 900px) { .philosophy-grid { grid-template-columns: repeat(3, 1fr); } }
.philosophy-card {
    border-radius: 22px;
    padding: 1.8rem;
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.08);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
.philosophy-card h3 { margin: 0; font-size: 1.35rem; }
.philosophy-card p { margin: 0; color: var(--text-muted); line-height: 1.7; }
.philosophy-card a {
    margin-top: auto;
    font-size: 0.85rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--accent-gold);
}

/* Minimal sections */
.section--narrow .section-content {
    max-width: 940px;
    margin: 0 auto;
    text-align: left;
}
.section--contrast {
    background: linear-gradient(135deg, rgba(255,255,255,0.02), rgba(255,255,255,0));
}

.section--hero {
    position: relative;
    overflow: hidden;
    min-height: calc(100vh - 4rem);
    padding-top: clamp(4rem, 8vw, 8rem);
}
.section--hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(5,5,5,0.75) 0%, rgba(5,5,5,0.3) 40%, rgba(5,5,5,0.85) 100%);
    z-index: 0;
    pointer-events: none;
}
.section--hero .hero-video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
    filter: brightness(0.78) contrast(1.08) saturate(1.05);
}
.section--hero .section-content {
    position: relative;
    z-index: 2;
}
.section--hero h1 {
    text-shadow: 0 20px 45px rgba(0,0,0,0.65);
}
.section--hero p {
    color: rgba(255,255,255,0.9);
    text-shadow: 0 10px 30px rgba(0,0,0,0.55);
}
.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2rem;
}
.hero-scroll {
    margin-top: 2.5rem;
    letter-spacing: 0.5em;
    text-transform: uppercase;
    font-size: 0.75rem;
    color: rgba(255,255,255,0.65);
}

/* Flow */
.flow-shell { display: flex; flex-direction: column; gap: 1.75rem; }
.flow-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}
@media (min-width: 900px) { .flow-grid { grid-template-columns: repeat(4, minmax(0,1fr)); } }
.flow-card {
    --glass-radius: 18px;
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.flow-step {
    font-size: 0.8rem;
    letter-spacing: 0.35em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.5);
}
.flow-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: radial-gradient(circle at top right, rgba(184,159,93,0.15), transparent 60%);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35s ease;
}
.flow-card:hover::after { opacity: 1; }
.flow-card h3 { margin: 0; }
.flow-card p { margin: 0; color: var(--text-muted); line-height: 1.6; }

/* Timeline */
.section--timeline {
    background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(0,0,0,0));
}
.timeline-grid {
    margin-top: 2rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.75rem;
}
@media (min-width: 992px) { .timeline-grid { grid-template-columns: repeat(2, 1fr); } }
.timeline-grid article {
    border-left: 2px solid rgba(255,255,255,0.08);
    padding-left: 1.25rem;
    position: relative;
}
.timeline-grid article::before {
    content: '';
    position: absolute;
    left: -11px;
    top: 0.3rem;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent-gold);
    box-shadow: 0 0 12px rgba(184,159,93,0.6);
}
.timeline-year {
    font-size: 0.85rem;
    letter-spacing: 0.35em;
    text-transform: uppercase;
    color: var(--accent-gold);
}
.timeline-grid p {
    margin-top: 0.5rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* Craft */
.craft-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-top: 2.5rem;
}
@media (min-width: 900px) { .craft-grid { grid-template-columns: repeat(3, 1fr); } }
.craft-card {
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.08);
    background: rgba(255,255,255,0.02);
}
.craft-card img {
    width: 100%;
    height: 260px;
    object-fit: cover;
    display: block;
}
.craft-card figcaption {
    padding: 1.5rem;
}
.craft-card strong {
    letter-spacing: 0.2em;
    font-size: 0.75rem;
    text-transform: uppercase;
    color: rgba(255,255,255,0.7);
}
.craft-card p {
    margin-top: 0.75rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* Materials */
.materials-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
    margin-top: 2rem;
}
@media (min-width: 1024px) { .materials-grid { grid-template-columns: repeat(3, 1fr); } }
.material-card {
    --glass-radius: 18px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 100%;
}
.material-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    flex-shrink: 0;
}
.material-card div {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
.material-card h3 { margin: 0; }
.material-card p { margin: 0; color: var(--text-muted); line-height: 1.7; }

/* Collections List - Smart Minimal Design */
.collections-list {
    display: flex;
    flex-direction: column;
    gap: 4rem;
    margin-top: 4rem;
}

.collection-item {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: center;
    padding: 0;
    border: none;
    background: transparent;
    position: relative;
}

@media (min-width: 1024px) {
    .collection-item {
        grid-template-columns: 1.2fr 1fr;
        gap: 4rem;
    }
    .collection-item:nth-child(even) {
        grid-template-columns: 1fr 1.2fr;
    }
    .collection-item:nth-child(even) .collection-item__content {
        order: 2;
    }
    .collection-item:nth-child(even) .collection-item__image {
        order: 1;
    }
}

.collection-item--featured {
    padding: 3rem 0;
    border-top: 1px solid rgba(197, 160, 89, 0.2);
    border-bottom: 1px solid rgba(197, 160, 89, 0.2);
    margin: 2rem 0;
}

.collection-item__content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.collection-item__header {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

@media (min-width: 768px) {
    .collection-item__header {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
    }
}

.collection-item__label {
    font-family: 'Noto Serif JP', serif;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text-subtle);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    display: inline-block;
    margin-bottom: 0.5rem;
}

.collection-item__label--featured {
    color: var(--brand-gold);
}

.collection-item__title {
    font-family: 'Noto Serif JP', serif;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-main);
    margin: 0;
    line-height: 1.5;
    letter-spacing: 0.02em;
}

@media (min-width: 768px) {
    .collection-item__title {
        font-size: 2rem;
    }
}

.collection-item__price {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.25rem;
}

.price-value {
    font-family: 'Noto Serif JP', serif;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1;
}

.collection-item__price--featured .price-value {
    color: var(--brand-gold);
}

.price-note {
    font-size: 0.75rem;
    color: var(--text-subtle);
    letter-spacing: 0.05em;
}

.collection-item__desc {
    color: var(--text-body);
    line-height: 2;
    margin: 0;
    font-size: 1rem;
    letter-spacing: 0.03em;
}

.collection-item__specs {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

@media (min-width: 768px) {
    .collection-item__specs {
        grid-template-columns: repeat(3, 1fr);
    }
}

.spec-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.spec-label {
    font-size: 0.75rem;
    color: var(--text-subtle);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-weight: 500;
}

.spec-value {
    font-size: 0.9375rem;
    color: var(--text-body);
    line-height: 1.7;
    letter-spacing: 0.02em;
}

.collection-item__image {
    width: 100%;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    border-radius: 8px;
    position: relative;
}

.collection-item__image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.03), transparent 60%);
    pointer-events: none;
}

.collection-item__image picture,
.collection-item__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.collection-item:hover .collection-item__image img {
    transform: scale(1.03);
}

/* FAQ Section */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-top: 2rem;
}

.faq-item {
    padding: 2rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    font-family: 'Noto Serif JP', serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
    margin: 0 0 1rem 0;
    line-height: 1.6;
    letter-spacing: 0.02em;
}

.faq-answer {
    color: var(--text-body);
    line-height: 2;
    font-size: 1rem;
    letter-spacing: 0.03em;
}

.faq-answer p {
    margin: 0;
}

.faq-answer strong {
    color: var(--text-main);
    font-weight: 700;
}

/* Parallax Salon */
.section--parallax {
    background-image: linear-gradient(180deg, rgba(0,0,0,0.6), rgba(0,0,0,0.85)), url('../images/9.png');
    background-size: cover;
    background-position: center center;
    background-attachment: fixed;
    position: relative;
}
.section-content--glass {
    background: rgba(5,5,5,0.55);
    border: 1px solid rgba(255,255,255,0.08);
}

/* Journal feature */
.journal-feature {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    align-items: center;
}
@media (min-width: 1024px) { .journal-feature { grid-template-columns: 1.1fr 0.9fr; } }
.journal-copy { display: flex; flex-direction: column; gap: 1.5rem; }
.journal-meta {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    letter-spacing: 0.2em;
    font-size: 0.75rem;
    text-transform: uppercase;
    color: rgba(255,255,255,0.6);
}
.journal-image img {
    width: 100%;
    border-radius: 18px;
    object-fit: cover;
}
.journal-image__link {
    display: block;
    position: relative;
    border-radius: 18px;
    overflow: hidden;
}
.journal-image__link::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 60% 40%, rgba(0,0,0,0), rgba(0,0,0,0.55));
    opacity: 0;
    transition: opacity 0.35s ease;
}
.journal-image__link:hover::after { opacity: 1; }
.journal-chip {
    display: inline-flex;
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: 999px;
    padding: 0.2rem 0.85rem;
    letter-spacing: 0.25em;
    font-size: 0.75rem;
    text-transform: uppercase;
    color: rgba(255,255,255,0.7);
}
.journal-title-label {
    font-size: 0.6em;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.65);
    display: inline-block;
    margin-left: 0.4rem;
}

/* Signatures */
.signature-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
}
.signature-card {
    --glass-radius: 18px;
    padding: 1.75rem;
}
.signature-quote {
    font-size: 1.25rem;
    line-height: 1.8;
    font-family: 'Noto Serif JP', serif;
    margin: 0 0 1rem;
}
.signature-card::before {
    content: '“';
    position: absolute;
    top: -20px;
    right: 20px;
    font-size: 5rem;
    color: rgba(184,159,93,0.1);
    font-family: 'Noto Serif JP', serif;
}
.signature-meta {
    letter-spacing: 0.2em;
    font-size: 0.75rem;
    text-transform: uppercase;
    color: rgba(255,255,255,0.6);
    margin: 0;
}

/* Stats */
.section--stats {
    background: linear-gradient(180deg, rgba(10,10,10,0.95), rgba(5,5,5,0.95));
}
.section--stats .section-content {
    text-align: center;
}
.stats-cards {
    margin-top: 2.5rem;
    display: grid;
    grid-template-columns: repeat(2, minmax(0,1fr));
    gap: 1rem;
}
@media (min-width: 768px) { .stats-cards { grid-template-columns: repeat(4, minmax(0,1fr)); } }
.stat-card {
    --glass-radius: 18px;
    padding: 1.75rem 1rem;
}
.stat-number {
    font-size: 2.5rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    display: inline-flex;
    align-items: flex-end;
    gap: 0.15em;
}
.stat-unit {
    font-size: 0.85rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
}
.stat-card p {
    margin-top: 0.5rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    font-size: 0.8rem;
    text-transform: uppercase;
}
.stat-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 18px;
    background: radial-gradient(circle at bottom, rgba(184,159,93,0.12), transparent 70%);
    opacity: 0;
    transition: opacity 0.35s ease;
}
.stat-card:hover::after { opacity: 1; }

/* Invitation */
.section--invitation {
    background: linear-gradient(180deg, rgba(5,5,5,0.9), rgba(5,5,5,0.95));
}
.section--invitation .section-content {
    background: none;
    border: none;
    box-shadow: none;
}

/* FAQ */
.faq-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}
@media (min-width: 992px) { .faq-grid { grid-template-columns: 0.8fr 1fr; } }
.faq-intro { display: flex; flex-direction: column; gap: 1.5rem; }
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.faq-list details {
    padding: 1.25rem 1.5rem;
    border-radius: 18px;
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.08);
}
.faq-list summary {
    cursor: pointer;
    font-weight: 500;
}
.faq-list p {
    margin-top: 0.5rem;
    color: var(--text-muted);
    line-height: 1.75;
}
.font-serif-jp { font-family: 'Noto Serif JP', serif; }
.font-serif-en { font-family: 'Noto Serif JP', serif; }
.text-gold { color: var(--accent-gold); }

/* Header & Navigation */
#main-header { 
    z-index: 100; 
    background: linear-gradient(180deg, rgba(21, 21, 21, 0.55) 0%, rgba(21, 21, 21, 0.2) 100%);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.02);
}
#hamburger-button { 
    border: 1px solid rgba(184, 159, 93, 0.2); 
    border-radius: 12px; 
    background: linear-gradient(135deg, rgba(30, 30, 30, 0.8) 0%, rgba(40, 40, 40, 0.6) 100%); 
    backdrop-filter: blur(10px); 
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.1); 
    padding: 0.875rem; 
    min-width: 52px;
    min-height: 52px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1); 
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}
#hamburger-button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(184, 159, 93, 0.3) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}
#hamburger-button:hover::before {
    width: 120%;
    height: 120%;
}
#hamburger-button:hover { 
    transform: scale(1.08); 
    border-color: rgba(184, 159, 93, 0.4);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.5), 0 0 20px rgba(184, 159, 93, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.15);
}
#hamburger-button:active {
    transform: scale(0.95);
}
.hamburger { 
    width: 28px; 
    height: 20px; 
    display: flex; 
    flex-direction: column; 
    justify-content: space-between; 
    position: relative;
    z-index: 1;
}
.hamburger span { 
    background: linear-gradient(90deg, var(--text-main) 0%, var(--accent-gold) 100%); 
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1); 
    height: 3px; 
    display: block; 
    width: 100%;
    border-radius: 3px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}
.hamburger.open span {
    background: linear-gradient(90deg, var(--accent-gold) 0%, var(--text-main) 100%);
}
.hamburger.open span:nth-child(1) { 
    transform: translateY(8.5px) rotate(45deg); 
    box-shadow: 0 2px 5px rgba(184, 159, 93, 0.4);
}
.hamburger.open span:nth-child(2) { 
    opacity: 0; 
    transform: scaleX(0);
}
.hamburger.open span:nth-child(3) { 
    transform: translateY(-8.5px) rotate(-45deg); 
    box-shadow: 0 2px 5px rgba(184, 159, 93, 0.4);
}
#mobile-nav { 
    z-index: 98; 
    background: linear-gradient(135deg, rgba(21, 21, 21, 0.98) 0%, rgba(15, 15, 15, 0.98) 100%); 
    backdrop-filter: blur(20px); 
    transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.5s ease; 
    visibility: hidden;
    opacity: 0;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    pointer-events: none;
}
#mobile-nav::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(184, 159, 93, 0.05) 0%, transparent 70%);
    pointer-events: none;
}
#mobile-nav.is-open { 
    visibility: visible;
    opacity: 1; 
    pointer-events: auto;
}
#mobile-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    position: relative;
    z-index: 1;
    width: min(90%, 460px);
}
#mobile-nav ul li {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}
#mobile-nav.is-open ul li {
    opacity: 1;
    transform: translateY(0);
}
#mobile-nav.is-open ul li:nth-child(1) { transition-delay: 0.1s; }
#mobile-nav.is-open ul li:nth-child(2) { transition-delay: 0.15s; }
#mobile-nav.is-open ul li:nth-child(3) { transition-delay: 0.2s; }
#mobile-nav.is-open ul li:nth-child(4) { transition-delay: 0.25s; }
#mobile-nav.is-open ul li:nth-child(5) { transition-delay: 0.3s; }
#mobile-nav.is-open ul li:nth-child(6) { transition-delay: 0.35s; }
#mobile-nav.is-open ul li:nth-child(7) { transition-delay: 0.4s; }
.nav-item { 
    font-size: 1.6rem; 
    font-weight: 300; 
    letter-spacing: 0.12em; 
    position: relative; 
    text-decoration: none; 
    color: var(--text-muted); 
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1); 
    padding: 1rem 1.25rem;
    min-height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    margin: 0.15rem 0;
    line-height: 1.3;
}
.nav-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(184, 159, 93, 0.1) 0%, rgba(184, 159, 93, 0.05) 100%);
    border-radius: 8px;
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: -1;
}
.nav-item:hover::before,
.nav-item.active::before {
    opacity: 1;
}
.nav-item:hover, 
.nav-item.active { 
    color: var(--accent-gold); 
    transform: translateX(5px);
    text-shadow: 0 0 10px rgba(184, 159, 93, 0.3);
}
.nav-item::after { 
    content: ''; 
    position: absolute; 
    width: 0; 
    height: 2px; 
    display: block; 
    bottom: 0.5rem;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(90deg, transparent 0%, var(--accent-gold) 50%, transparent 100%); 
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 10px rgba(184, 159, 93, 0.5);
}
.nav-item:hover::after, 
.nav-item.active::after { 
    width: 60%; 
}

.nav-item--journal {
    flex-direction: column;
    gap: 0.35rem;
}
.nav-item-main {
    font-size: inherit;
    letter-spacing: inherit;
}
.nav-item-sub {
    font-size: 0.6rem;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: var(--text-subtle);
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    /* タイポグラフィの最適化 */
    body {
        font-size: 16px; /* 最小16pxで可読性を確保 */
        line-height: 1.75; /* 行間を適切に設定 */
        letter-spacing: 0.02em; /* 文字間隔を調整 */
    }
    
    /* 見出しサイズの最適化 */
    h1 {
        font-size: clamp(2rem, 8vw, 3rem); /* 2rem-3remの範囲で可変 */
        line-height: 1.3;
        margin-bottom: 1.5rem;
    }
    
    h2 {
        font-size: clamp(1.75rem, 6vw, 2.5rem);
        line-height: 1.4;
        margin-bottom: 1.25rem;
    }
    
    h3 {
        font-size: clamp(1.5rem, 5vw, 2rem);
        line-height: 1.5;
        margin-bottom: 1rem;
    }
    
    /* 本文の最適化 */
    p {
        font-size: 1rem;
        line-height: 1.8;
        margin-bottom: 1.25rem;
    }
    
    /* セクションキッカーの最適化 */
    .section-kicker {
        font-size: 0.75rem;
        letter-spacing: 0.15em;
        margin-bottom: 0.75rem;
    }
    
    /* セクションの余白調整 */
    .section {
        padding: clamp(3rem, 8vw, 4rem) 1.25rem;
    }
    
    .section--narrow {
        padding: clamp(2.5rem, 6vw, 3.5rem) 1.25rem;
    }
    
    .section-content {
        max-width: 100%;
        padding: 0;
    }
    
    /* ヘッダーの最適化 */
    #main-header {
        padding: 1rem;
        background: linear-gradient(180deg, rgba(21, 21, 21, 0.98) 0%, rgba(21, 21, 21, 0.9) 100%);
    }
    
    #main-header img {
        height: 3rem !important;
    }
    
    /* ハンバーガーメニューの最適化 */
    #hamburger-button {
        display: flex !important;
        min-width: 56px;
        min-height: 56px;
        padding: 1rem;
        touch-action: manipulation; /* ダブルタップズームを防止 */
    }
    
    .hamburger {
        width: 32px;
        height: 24px;
    }
    
    .hamburger span {
        height: 3.5px;
    }
    
    .hamburger.open span:nth-child(1) { 
        transform: translateY(10.25px) rotate(45deg); 
        box-shadow: 0 2px 6px rgba(184, 159, 93, 0.5);
    }
    .hamburger.open span:nth-child(3) { 
        transform: translateY(-10.25px) rotate(-45deg); 
        box-shadow: 0 2px 6px rgba(184, 159, 93, 0.5);
    }
    
    .nav-item {
        font-size: 1.5rem;
        padding: 1rem 1.25rem;
        min-height: 56px;
        margin: 0.2rem 0;
    }
    
    #mobile-nav ul {
        width: 90%;
        max-width: 100%;
        padding: 1.75rem 0;
    }
    
    /* ボタンの最適化（タッチターゲット） */
    .btn,
    .btn-primary,
    .btn-ghost,
    .btn-secondary {
        min-width: 44px;
        min-height: 44px;
        padding: 0.875rem 1.75rem;
        font-size: 0.9375rem;
        line-height: 1.5;
        touch-action: manipulation; /* ダブルタップズームを防止 */
    }
    
    /* リンクのタッチ領域拡大 */
    a:not(.btn):not(.nav-item) {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        padding: 0.5rem 0.75rem;
        margin: -0.5rem -0.75rem; /* タッチ領域を拡大 */
    }
    
    /* フォーム要素の最適化 */
    input,
    textarea,
    select {
        min-height: 44px;
        font-size: 16px; /* iOSでのズームを防止 */
        padding: 0.75rem 1rem;
        border-radius: 8px;
    }
    
    /* ヒーローセクションの最適化 */
    .section--hero {
        min-height: 70vh;
        padding: 2rem 1.25rem;
    }
    
    .hero-frame {
        padding: 2rem 1.5rem;
        max-width: 100%;
    }
    
    .hero-frame h1 {
        font-size: clamp(2rem, 10vw, 3rem);
        line-height: 1.2;
        margin-bottom: 1.5rem;
    }
    
    .hero-frame p {
        font-size: 0.9375rem;
        line-height: 1.75;
        margin-bottom: 2rem;
    }
    
    .hero-cta {
        flex-direction: column;
        gap: 1rem;
        width: 100%;
    }
    
    .hero-cta .btn {
        width: 100%;
        justify-content: center;
    }
    
    /* コレクションリストの最適化 */
    .collections-list {
        gap: 3rem;
        margin-top: 2.5rem;
    }
    
    .collection-item {
        gap: 2rem;
        padding: 0;
    }
    
    .collection-item__content {
        gap: 1.25rem;
    }
    
    .collection-item__header {
        flex-direction: column;
        gap: 1rem;
        padding-bottom: 1.25rem;
    }
    
    .collection-item__title {
        font-size: clamp(1.5rem, 5vw, 1.75rem);
        line-height: 1.4;
    }
    
    .collection-item__price {
        align-items: flex-start;
        margin-top: 0.5rem;
    }
    
    .price-value {
        font-size: 1.5rem;
    }
    
    .collection-item__desc {
        font-size: 0.9375rem;
        line-height: 1.85;
    }
    
    .collection-item__specs {
        grid-template-columns: 1fr;
        gap: 1.25rem;
        padding-top: 1.25rem;
    }
    
    .collection-item__image {
        aspect-ratio: 16 / 9;
        border-radius: 12px;
    }
    
    /* フローグリッドの最適化 */
    .flow-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .flow-card {
        padding: 1.5rem;
        min-height: auto;
    }
    
    /* クラフトグリッドの最適化 */
    .craft-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .craft-card {
        padding: 1.25rem;
    }
    
    /* FAQリストの最適化 */
    .faq-list {
        gap: 1.5rem;
    }
    
    .faq-item {
        padding: 1.5rem 0;
    }
    
    .faq-question {
        font-size: 1.125rem;
        margin-bottom: 0.75rem;
    }
    
    .faq-answer {
        font-size: 0.9375rem;
        line-height: 1.85;
    }
    
    /* ジャーナルカルーセルの最適化 */
    .journal-carousel-header {
        flex-direction: column;
        gap: 1.25rem;
    }
    
    .journal-carousel-header h2 {
        font-size: clamp(2rem, 6vw, 2.5rem);
    }
    
    .journal-carousel-card {
        padding: clamp(1.25rem, 3vw, 2rem);
        min-height: auto;
    }
    
    .journal-carousel-card__title {
        font-size: 1.25rem;
    }
    
    .journal-carousel-card__excerpt {
        font-size: 0.9375rem;
    }
}

/* 小型スマートフォン対応（480px以下） */
@media (max-width: 480px) {
    body {
        font-size: 15px;
    }
    
    .section {
        padding: 2.5rem 1rem;
    }
    
    .section-content {
        padding: 0;
    }
    
    h1 {
        font-size: clamp(1.75rem, 9vw, 2.5rem);
    }
    
    h2 {
        font-size: clamp(1.5rem, 7vw, 2rem);
    }
    
    .collection-item__title {
        font-size: 1.375rem;
    }
    
    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.9375rem;
    }
    
    .nav-item {
        font-size: 1.375rem;
        padding: 0.875rem 1rem;
    }
    
    .hero-frame {
        padding: 1.5rem 1rem;
    }
    
    .hero-frame h1 {
        font-size: clamp(1.75rem, 9vw, 2.5rem);
    }
    
    .hero-frame p {
        font-size: 0.875rem;
    }
}

/* --- Footer --- */
#main-footer { background-color: #111; padding: 4rem 2rem; color: var(--text-muted); }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; }
@media (min-width: 768px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; } }
.footer-grid .col-span-full {
    grid-column: 1 / -1;
}
.footer-grid ul li { margin-bottom: 0.75rem; }
.footer-logo-link img {
    transition: transform 0.4s ease, filter 0.4s ease;
}
.footer-logo-link:hover img,
.footer-logo-link:focus-visible img {
    transform: scale(1.05);
    filter: drop-shadow(0 0 14px rgba(184, 159, 93, 0.35));
}
.footer-link { 
    color: var(--text-muted); 
    text-decoration: none; 
    position: relative; 
    padding: 0.65rem 0.75rem; 
    min-height: 44px; 
    display: flex; 
    align-items: center; 
    gap: 0.35rem;
    letter-spacing: 0.08em;
    transition: color 0.35s ease, transform 0.35s ease;
}
.footer-link::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(184, 159, 93, 0.08), rgba(184, 159, 93, 0.02));
    border-radius: 6px;
    opacity: 0;
    transform: scaleX(0.94);
    transition: opacity 0.35s ease, transform 0.35s ease;
    z-index: -1;
}
.footer-link::after { 
    content: ''; 
    position: absolute; 
    bottom: 0.35rem;
    left: 0.75rem;
    width: 0; 
    height: 2px; 
    background: linear-gradient(90deg, transparent, rgba(184, 159, 93, 0.8), transparent); 
    transition: width 0.35s ease;
}
.footer-link:hover { 
    color: var(--accent-gold); 
    transform: translateX(6px);
}
.footer-link:hover::before {
    opacity: 1;
    transform: scaleX(1);
}
.footer-link:hover::after { 
    width: calc(100% - 1.5rem);
}

/* Mobile Footer */
@media (max-width: 768px) {
    #main-footer {
        padding: 3rem 1.5rem;
        font-size: 16px;
    }
    
    .footer-link {
        font-size: 16px;
        min-height: 48px;
    }
}

/* New Sections: Tech & Logic, Transparency, Community */
#logic .section-content,
#transparency-section .section-content,
#community-section .section-content {
    max-width: 1200px;
}

/* Tech & Logic Section - MBTI CTA */
#logic .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

/* Tech & Logic Section */
#logic .grid {
    display: grid;
    gap: clamp(2rem, 4vw, 4rem);
    align-items: center;
}
@media (min-width: 768px) {
    #logic .grid {
        grid-template-columns: 1fr 1fr;
    }
}

#logic .aspect-video {
    aspect-ratio: 16 / 9;
    width: 100%;
}

#logic .border-gray-800 {
    border-color: var(--border-color);
}

#logic .bg-black\/40 {
    background-color: rgba(0, 0, 0, 0.4);
}

/* Transparency Section */
#transparency-section .grid {
    display: grid;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}
@media (min-width: 768px) {
    #transparency-section .grid {
        grid-template-columns: 1fr 1fr;
    }
}

#transparency-section article {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}
#transparency-section article:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

#transparency-section .border-gray-800 {
    border-color: var(--border-color);
}

#transparency-section .bg-black\/20 {
    background-color: rgba(0, 0, 0, 0.2);
}

#transparency-section .bg-black\/40 {
    background-color: rgba(0, 0, 0, 0.4);
}

/* Community Section */
#community-section .grid {
    display: grid;
    gap: clamp(2rem, 4vw, 4rem);
    align-items: center;
}
@media (min-width: 768px) {
    #community-section .grid {
        grid-template-columns: 1fr 1fr;
    }
}

#community-section .relative.h-96 {
    min-height: 300px;
    border-radius: 20px;
    background: linear-gradient(135deg, rgba(184, 159, 93, 0.1), rgba(0, 0, 0, 0.8));
    border: 1px solid rgba(255, 255, 255, 0.08);
}

#community-section .bg-gray-900 {
    background-color: rgba(17, 17, 17, 0.9);
}

#community-section a {
    transition: color 0.3s ease, border-color 0.3s ease;
}

#community-section a:hover {
    color: var(--brand-gold);
    border-color: var(--brand-gold);
}

/* Responsive adjustments for new sections */
@media (max-width: 767px) {
    #logic .order-2,
    #logic .order-1 {
        order: 0;
    }
    
    #transparency-section .grid {
        grid-template-columns: 1fr;
    }
    
    #transparency-section article {
        margin-bottom: 1.5rem;
    }
    
    #community-section .grid {
        grid-template-columns: 1fr;
    }
    
    #community-section .relative.h-96 {
        min-height: 250px;
        margin-top: 2rem;
    }
    
    #logic h2,
    #transparency-section h2,
    #community-section h2 {
        font-size: clamp(2rem, 5vw, 2.5rem);
    }
}

/* Ensure brand-gold color works with Tailwind classes */
.text-brand-gold {
    color: var(--brand-gold) !important;
}
.bg-brand-gold {
    background-color: var(--brand-gold) !important;
}
.border-brand-gold {
    border-color: var(--brand-gold) !important;
}

/* Glass morphism consistency for new sections */
#logic .rounded-2xl,
#transparency-section .rounded-2xl,
#community-section .rounded-2xl {
    border-radius: 20px;
}

#logic .backdrop-blur-sm,
#transparency-section .backdrop-blur-sm {
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}