/* ============================================
   波導調律器 LP - Style Sheet
   ============================================ */

/* === Reset & Base === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-bg: #0a0a0f;
    --color-bg-light: #121218;
    --color-bg-card: #1a1a24;
    --color-text: #e8e8ef;
    --color-text-muted: #9999aa;
    --color-accent: #b8a9d4;
    --color-accent-light: #d4c8ef;
    --color-gold: #c9b896;
    --color-gold-light: #e0d4b8;
    --color-border: rgba(255, 255, 255, 0.08);
    --color-glow: rgba(184, 169, 212, 0.15);
    --font-sans: 'Noto Sans JP', sans-serif;
    --font-serif: 'Noto Serif JP', serif;
    --transition: 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    --shadow-soft: 0 4px 30px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(184, 169, 212, 0.1);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.8;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 120px 0;
    position: relative;
}

.sp-only {
    display: none;
}

/* === Navigation === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--color-text);
}

.logo-mark {
    color: var(--color-accent);
    margin-right: 4px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    position: relative;
    padding-bottom: 4px;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--color-text);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 1.5px;
    background: var(--color-text);
    transition: var(--transition);
}

/* === Hero Section === */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: radial-gradient(ellipse at 30% 50%, rgba(184, 169, 212, 0.06) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(201, 184, 150, 0.04) 0%, transparent 60%),
                var(--color-bg);
}

.hero-bg-overlay {
    position: absolute;
    inset: 0;
    background: 
        linear-gradient(135deg, rgba(184, 169, 212, 0.03) 0%, transparent 50%),
        linear-gradient(225deg, rgba(201, 184, 150, 0.02) 0%, transparent 50%);
    pointer-events: none;
}

.hero-particles {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.hero-particles .particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--color-accent);
    border-radius: 50%;
    opacity: 0;
    animation: particleFloat 8s infinite ease-in-out;
}

@keyframes particleFloat {
    0%, 100% { opacity: 0; transform: translateY(100vh) scale(0); }
    10% { opacity: 0.6; }
    90% { opacity: 0.6; }
    50% { transform: translateY(-10vh) scale(1); }
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 80px;
    max-width: 1200px;
    padding: 0 24px;
    width: 100%;
    z-index: 2;
}

.hero-text {
    flex: 1;
    max-width: 540px;
}

.hero-subtitle {
    font-size: 0.85rem;
    letter-spacing: 0.3em;
    color: var(--color-accent);
    margin-bottom: 24px;
    font-weight: 400;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 32px;
    letter-spacing: 0.08em;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-accent-light) 50%, var(--color-gold-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.05rem;
    line-height: 2;
    color: var(--color-text-muted);
    margin-bottom: 48px;
    font-weight: 300;
}

.btn-primary {
    display: inline-block;
    padding: 16px 48px;
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
    font-size: 0.9rem;
    letter-spacing: 0.15em;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
    z-index: -1;
}

.btn-primary:hover {
    color: var(--color-bg);
}

.btn-primary:hover::before {
    transform: scaleX(1);
}

.hero-image {
    flex: 0 0 400px;
    position: relative;
}

.hero-image img {
    width: 100%;
    border-radius: 4px;
    position: relative;
    z-index: 2;
}

.hero-image-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    background: radial-gradient(circle, rgba(184, 169, 212, 0.12) 0%, transparent 70%);
    z-index: 1;
    animation: glowPulse 4s infinite ease-in-out;
}

@keyframes glowPulse {
    0%, 100% { opacity: 0.5; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 1; transform: translate(-50%, -50%) scale(1.05); }
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    z-index: 2;
}

.scroll-indicator span {
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    color: var(--color-text-muted);
    text-transform: uppercase;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: var(--color-accent);
    animation: scrollLine 2s infinite ease-in-out;
}

@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* === Section Labels & Titles === */
.section-label {
    font-size: 0.75rem;
    letter-spacing: 0.3em;
    color: var(--color-accent);
    text-transform: uppercase;
    display: block;
    margin-bottom: 16px;
    font-weight: 400;
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(1.8rem, 3.5vw, 2.5rem);
    font-weight: 500;
    line-height: 1.5;
    letter-spacing: 0.06em;
    margin-bottom: 20px;
}

.section-divider {
    width: 60px;
    height: 1px;
    background: linear-gradient(90deg, var(--color-accent), transparent);
    margin-bottom: 32px;
}

.section-divider.center {
    margin-left: auto;
    margin-right: auto;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
}

.section-header {
    text-align: center;
    margin-bottom: 72px;
}

/* === About Section === */
.about {
    background: var(--color-bg-light);
}

.about-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-image {
    border-radius: 4px;
    overflow: hidden;
}

.about-image img {
    width: 100%;
    height: 500px;
    object-fit: cover;
    transition: transform 0.8s ease;
}

.about-image:hover img {
    transform: scale(1.03);
}

.about-description {
    font-size: 1rem;
    line-height: 2.2;
    color: var(--color-text-muted);
    margin-bottom: 24px;
    font-weight: 300;
}

/* === Features Section === */
.features {
    background: var(--color-bg);
}

.features-hero {
    margin-bottom: 80px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
}

.features-hero img {
    width: 100%;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.feature-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    padding: 48px 32px;
    text-align: center;
    border-radius: 4px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    opacity: 0;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: rgba(184, 169, 212, 0.15);
    box-shadow: var(--shadow-glow);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    position: relative;
    width: 72px;
    height: 72px;
    margin: 0 auto 28px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon i {
    font-size: 1.6rem;
    color: var(--color-accent);
    position: relative;
    z-index: 2;
}

.icon-ring {
    position: absolute;
    inset: 0;
    border: 1px solid rgba(184, 169, 212, 0.2);
    border-radius: 50%;
    transition: var(--transition);
}

.feature-card:hover .icon-ring {
    border-color: rgba(184, 169, 212, 0.4);
    transform: scale(1.1);
}

.feature-card h3 {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    font-weight: 500;
    margin-bottom: 16px;
    letter-spacing: 0.04em;
}

.feature-card p {
    font-size: 0.88rem;
    line-height: 1.9;
    color: var(--color-text-muted);
    font-weight: 300;
}

/* === Gallery Section === */
.gallery {
    background: var(--color-bg-light);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 4px;
    cursor: pointer;
    aspect-ratio: 1;
}

.gallery-item.gallery-large {
    grid-column: span 1;
    grid-row: span 2;
    aspect-ratio: auto;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

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

.gallery-overlay {
    position: absolute;
    inset: 0;
    background: rgba(10, 10, 15, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-overlay span {
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    color: var(--color-text);
    border-bottom: 1px solid var(--color-accent);
    padding-bottom: 4px;
}

/* === Lightbox === */
.lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-content {
    max-width: 90vw;
    max-height: 90vh;
}

.lightbox-content img {
    max-width: 90vw;
    max-height: 85vh;
    object-fit: contain;
    border-radius: 4px;
}

.lightbox-close {
    position: absolute;
    top: 24px;
    right: 32px;
    font-size: 2rem;
    color: var(--color-text);
    background: none;
    border: none;
    cursor: pointer;
    z-index: 10;
    transition: var(--transition);
    line-height: 1;
}

.lightbox-close:hover {
    color: var(--color-accent);
}

.lightbox-prev,
.lightbox-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 16px;
    transition: var(--transition);
    z-index: 10;
}

.lightbox-prev { left: 24px; }
.lightbox-next { right: 24px; }

.lightbox-prev:hover,
.lightbox-next:hover {
    color: var(--color-accent);
}

/* === Recommend Section === */
.recommend {
    background: var(--color-bg);
}

.recommend-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 24px;
}

.recommend-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    padding: 40px 20px;
    text-align: center;
    border-radius: 4px;
    transition: var(--transition);
}

.recommend-card:hover {
    border-color: rgba(184, 169, 212, 0.2);
    transform: translateY(-4px);
}

.recommend-icon {
    margin-bottom: 20px;
}

.recommend-icon i {
    font-size: 1.8rem;
    color: var(--color-accent);
}

.recommend-card p {
    font-size: 0.9rem;
    line-height: 1.8;
    color: var(--color-text-muted);
    font-weight: 400;
}

/* === How To Section === */
.howto {
    background: var(--color-bg-light);
}

.howto-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.howto-image {
    border-radius: 4px;
    overflow: hidden;
}

.howto-image img {
    width: 100%;
    height: 480px;
    object-fit: cover;
}

.howto-steps {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.howto-step {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

.step-number {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 300;
    color: var(--color-accent);
    opacity: 0.6;
    line-height: 1;
    flex-shrink: 0;
    padding-top: 4px;
}

.step-content h4 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 8px;
    letter-spacing: 0.04em;
}

.step-content p {
    font-size: 0.92rem;
    line-height: 1.9;
    color: var(--color-text-muted);
    font-weight: 300;
}

/* === Specs Section === */
.specs {
    background: var(--color-bg);
}

.specs-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.specs-image {
    border-radius: 4px;
    overflow: hidden;
    background: linear-gradient(135deg, #f8f8fa, #eeeef2);
    padding: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.specs-image img {
    max-height: 400px;
    object-fit: contain;
}

.specs-table table {
    width: 100%;
    border-collapse: collapse;
}

.specs-table tr {
    border-bottom: 1px solid var(--color-border);
}

.specs-table th {
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--color-text);
    padding: 20px 16px;
    text-align: left;
    width: 40%;
    white-space: nowrap;
}

.specs-table th i {
    color: var(--color-accent);
    margin-right: 10px;
    width: 18px;
    text-align: center;
}

.specs-table td {
    font-size: 0.92rem;
    color: var(--color-text-muted);
    padding: 20px 16px;
    font-weight: 300;
}

/* === Notes Section === */
.notes {
    background: var(--color-bg-light);
    padding: 80px 0;
}

.notes-box {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    padding: 48px;
    max-width: 800px;
    margin: 0 auto;
}

.notes-box h3 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 24px;
    color: var(--color-gold);
}

.notes-box h3 i {
    margin-right: 8px;
}

.notes-box ul {
    list-style: none;
}

.notes-box li {
    font-size: 0.88rem;
    line-height: 1.9;
    color: var(--color-text-muted);
    font-weight: 300;
    padding-left: 20px;
    position: relative;
    margin-bottom: 12px;
}

.notes-box li::before {
    content: '※';
    position: absolute;
    left: 0;
    color: var(--color-gold);
}

/* === Closing Section === */
.closing {
    padding: 160px 0;
    text-align: center;
    background: radial-gradient(ellipse at center, rgba(184, 169, 212, 0.05) 0%, transparent 70%),
                var(--color-bg);
    position: relative;
    overflow: hidden;
}

.closing-bg-overlay {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 30% 50%, rgba(184, 169, 212, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 70% 50%, rgba(201, 184, 150, 0.02) 0%, transparent 50%);
}

.closing-content {
    position: relative;
    z-index: 2;
}

.closing-message {
    font-family: var(--font-serif);
    font-size: clamp(1.3rem, 2.5vw, 1.8rem);
    font-weight: 400;
    line-height: 2.2;
    letter-spacing: 0.1em;
    color: var(--color-text);
}

.closing-symbol {
    font-size: 2rem;
    color: var(--color-accent);
    margin-top: 48px;
    opacity: 0.6;
    animation: symbolPulse 3s infinite ease-in-out;
}

@keyframes symbolPulse {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.1); }
}

/* === Buy Button (Primary CTA) === */
.btn-buy {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 18px 48px;
    background: linear-gradient(135deg, var(--color-accent) 0%, #9b8abf 100%);
    color: var(--color-bg);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    border-radius: 4px;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(184, 169, 212, 0.25);
}

.btn-buy::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-accent-light) 0%, var(--color-accent) 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.btn-buy:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(184, 169, 212, 0.4);
    color: var(--color-bg);
}

.btn-buy:hover::before {
    opacity: 1;
}

.btn-buy i,
.btn-buy span {
    position: relative;
    z-index: 2;
}

.btn-buy.btn-buy-large {
    padding: 22px 64px;
    font-size: 1.05rem;
    border-radius: 6px;
    box-shadow: 0 6px 30px rgba(184, 169, 212, 0.3);
}

.btn-buy.btn-buy-large:hover {
    box-shadow: 0 12px 48px rgba(184, 169, 212, 0.5);
}

/* Hero CTA layout */
.hero-cta {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* === Nav Buy Button === */
.nav-buy-btn {
    background: var(--color-accent) !important;
    color: var(--color-bg) !important;
    padding: 8px 20px !important;
    border-radius: 4px !important;
    font-weight: 500 !important;
    font-size: 0.82rem !important;
    display: inline-flex !important;
    align-items: center;
    gap: 6px;
    transition: all 0.3s ease !important;
}

.nav-buy-btn::after {
    display: none !important;
}

.nav-buy-btn:hover {
    background: var(--color-accent-light) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(184, 169, 212, 0.3);
}

/* === CTA Banner === */
.cta-banner {
    padding: 60px 0;
    background: linear-gradient(135deg, rgba(184, 169, 212, 0.08) 0%, rgba(201, 184, 150, 0.05) 100%);
    border-top: 1px solid rgba(184, 169, 212, 0.1);
    border-bottom: 1px solid rgba(184, 169, 212, 0.1);
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(184, 169, 212, 0.06) 0%, transparent 70%);
    pointer-events: none;
}

.cta-banner-alt {
    background: linear-gradient(135deg, rgba(201, 184, 150, 0.06) 0%, rgba(184, 169, 212, 0.04) 100%);
}

.cta-banner-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    position: relative;
    z-index: 2;
}

.cta-banner-text {
    flex: 1;
}

.cta-banner-lead {
    font-family: var(--font-serif);
    font-size: clamp(1.2rem, 2vw, 1.5rem);
    font-weight: 500;
    letter-spacing: 0.08em;
    margin-bottom: 8px;
    color: var(--color-text);
}

.cta-banner-sub {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    letter-spacing: 0.05em;
    font-weight: 300;
}

/* === Closing CTA === */
.closing-cta {
    margin-top: 56px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.closing-cta-note {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    letter-spacing: 0.08em;
    font-weight: 300;
}

/* === Floating Buy Button === */
.floating-buy {
    position: fixed;
    bottom: 32px;
    right: 32px;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.floating-buy.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.floating-buy-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 28px;
    background: linear-gradient(135deg, var(--color-accent) 0%, #9b8abf 100%);
    color: var(--color-bg);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    border-radius: 50px;
    box-shadow: 0 8px 32px rgba(184, 169, 212, 0.35), 0 2px 8px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.floating-buy-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-accent-light) 0%, var(--color-accent) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: 50px;
}

.floating-buy-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(184, 169, 212, 0.5), 0 4px 12px rgba(0, 0, 0, 0.3);
    color: var(--color-bg);
}

.floating-buy-btn:hover::before {
    opacity: 1;
}

.floating-buy-btn i,
.floating-buy-btn span {
    position: relative;
    z-index: 2;
}

.floating-buy-btn i {
    font-size: 1rem;
}

/* Pulse animation on floating button */
.floating-buy-btn::after {
    content: '';
    position: absolute;
    inset: -3px;
    border-radius: 50px;
    border: 2px solid var(--color-accent);
    opacity: 0;
    animation: floatingPulse 2.5s infinite ease-out;
}

@keyframes floatingPulse {
    0% { opacity: 0.6; transform: scale(1); }
    100% { opacity: 0; transform: scale(1.15); }
}

/* === Breadcrumb (SEO - visually hidden) === */
.breadcrumb-nav {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Screen reader only utility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* === FAQ Section === */
.faq {
    background: var(--color-bg);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item[open] {
    border-color: rgba(184, 169, 212, 0.2);
}

.faq-question {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    cursor: pointer;
    list-style: none;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text);
    transition: var(--transition);
    user-select: none;
}

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

.faq-question:hover {
    color: var(--color-accent-light);
}

.faq-q-mark {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(184, 169, 212, 0.15);
    color: var(--color-accent);
    font-family: var(--font-serif);
    font-size: 0.9rem;
    font-weight: 600;
    flex-shrink: 0;
}

.faq-question span {
    flex: 1;
}

.faq-toggle-icon {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.faq-item[open] .faq-toggle-icon {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 24px 24px 72px;
}

.faq-answer p {
    font-size: 0.9rem;
    line-height: 2;
    color: var(--color-text-muted);
    font-weight: 300;
}

.faq-answer a {
    color: var(--color-accent);
    border-bottom: 1px solid rgba(184, 169, 212, 0.3);
}

.faq-answer a:hover {
    color: var(--color-accent-light);
    border-bottom-color: var(--color-accent-light);
}

/* === Footer === */
.footer {
    background: var(--color-bg);
    padding: 48px 0 32px;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    text-align: center;
}

.footer-brand {
    font-family: var(--font-serif);
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: 20px;
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px 24px;
    margin-bottom: 20px;
}

.footer-links a {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    letter-spacing: 0.04em;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--color-accent);
}

.footer-copy {
    font-size: 0.75rem;
    color: rgba(153, 153, 170, 0.5);
    letter-spacing: 0.05em;
}

/* === Animations === */
.animate-fade-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

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

/* Scroll Reveal */
.reveal-up,
.reveal-left,
.reveal-right {
    opacity: 0;
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-up { transform: translateY(40px); }
.reveal-left { transform: translateX(-40px); }
.reveal-right { transform: translateX(40px); }

.reveal-up.revealed,
.reveal-left.revealed,
.reveal-right.revealed {
    opacity: 1;
    transform: translate(0, 0);
}

.reveal-up.delay-1, .reveal-left.delay-1, .reveal-right.delay-1 { transition-delay: 0.15s; }
.reveal-up.delay-2, .reveal-left.delay-2, .reveal-right.delay-2 { transition-delay: 0.3s; }
.reveal-up.delay-3, .reveal-left.delay-3, .reveal-right.delay-3 { transition-delay: 0.45s; }

/* === Responsive === */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .recommend-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .hero-content {
        gap: 48px;
    }

    .hero-image {
        flex: 0 0 320px;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 80px 0;
    }

    .sp-only {
        display: inline;
    }

    /* Nav */
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(10, 10, 15, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 80px 40px;
        gap: 24px;
        transition: right 0.4s ease;
        border-left: 1px solid var(--color-border);
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        font-size: 1rem;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(4px, 4px);
    }
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(4px, -4px);
    }

    /* Hero */
    .hero-content {
        flex-direction: column-reverse;
        gap: 40px;
        padding-top: 100px;
        text-align: center;
    }

    .hero-image {
        flex: none;
        max-width: 280px;
    }

    .hero-text {
        max-width: 100%;
    }

    .hero-description {
        font-size: 0.95rem;
    }

    /* About */
    .about-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-image img {
        height: 300px;
    }

    /* Features */
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .feature-card {
        padding: 36px 24px;
    }

    /* Gallery */
    .gallery-grid {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }

    .gallery-item.gallery-large {
        grid-column: span 2;
        grid-row: span 1;
        aspect-ratio: 16/9;
    }

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

    .recommend-card {
        padding: 28px 16px;
    }

    /* How To */
    .howto-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .howto-image img {
        height: 280px;
    }

    /* Specs */
    .specs-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .specs-image {
        padding: 24px;
    }

    /* Notes */
    .notes-box {
        padding: 32px 24px;
    }

    /* Closing */
    .closing {
        padding: 100px 0;
    }

    .closing-message {
        font-size: 1.2rem;
        line-height: 2;
    }

    /* Hero CTA */
    .hero-cta {
        justify-content: center;
    }

    .btn-buy {
        padding: 16px 36px;
        font-size: 0.9rem;
    }

    .btn-buy.btn-buy-large {
        padding: 18px 48px;
        font-size: 0.95rem;
    }

    /* CTA Banner */
    .cta-banner {
        padding: 48px 0;
    }

    .cta-banner-inner {
        flex-direction: column;
        text-align: center;
        gap: 24px;
    }

    /* Nav buy button in mobile menu */
    .nav-buy-btn {
        text-align: center;
        justify-content: center;
        padding: 12px 24px !important;
        margin-top: 8px;
    }

    /* Floating button */
    .floating-buy {
        bottom: 20px;
        right: 20px;
    }

    .floating-buy-btn {
        padding: 14px 24px;
        font-size: 0.85rem;
    }

    /* Lightbox */
    .lightbox-prev { left: 8px; }
    .lightbox-next { right: 8px; }

    /* FAQ */
    .faq-answer {
        padding: 0 20px 20px 20px;
    }

    .faq-question {
        padding: 16px 20px;
        gap: 12px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .recommend-grid {
        grid-template-columns: 1fr;
    }

    .gallery-grid {
        grid-template-columns: 1fr;
    }

    .gallery-item.gallery-large {
        grid-column: span 1;
    }
}