:root {
    --color-bg: #111111;
    --color-bg-alt: #1a1a1a;
    --color-text: #ffffff;
    --color-text-muted: #cccccc;
    --color-gold: #D4AF37;
    --color-gold-hover: #b5952f;
    --color-border: #333333;

    --font-jp: 'Noto Sans JP', sans-serif;
    --font-en: 'Montserrat', sans-serif;

    --container-width: 1200px;
    --section-padding: 100px;
    --section-padding-mobile: 60px;
}

/* Reset & Base Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    font-family: var(--font-jp);
    background-color: var(--color-bg);
    color: var(--color-text);
    margin: 0;
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    margin: 0;
    line-height: 1.4;
}

p {
    margin: 0 0 1.5em;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

/* Utility Classes */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

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

.section-padding {
    padding: var(--section-padding) 0;
}

.bg-dark-gray {
    background-color: var(--color-bg-alt);
}

.bg-light-gray {
    background-color: #f5f5f5;
}

.text-dark {
    color: #333;
}

.mb-large {
    margin-bottom: 60px;
}

.mb-medium {
    margin-bottom: 40px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 15px 40px;
    font-family: var(--font-en);
    font-weight: 700;
    border-radius: 50px;
    transition: all 0.3s ease;
    cursor: pointer;
    text-align: center;
}

.btn-primary {
    background-color: var(--color-gold);
    color: #000;
}

.btn-primary:hover {
    background-color: var(--color-gold-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(212, 175, 55, 0.3);
}

.btn-large {
    padding: 20px 60px;
    font-size: 1.2rem;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(17, 17, 17, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--color-border);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 15px 20px;
}

.logo {
    font-family: var(--font-en);
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: 2px;
}

.cart-btn {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.cart-btn:hover {
    color: var(--color-gold);
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    min-height: 700px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    /* Overlay for text readability */
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    padding: 0 20px;
}

.hero-headline {
    font-size: 4rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    margin-bottom: 30px;
    text-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
    line-height: 1.2;
}

.hero-subline {
    font-size: 1.2rem;
    margin-bottom: 40px;
    color: #eee;
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.5);
}

.hero-guarantee {
    margin-top: 15px;
    font-size: 0.9rem;
    color: #ddd;
}

/* Three Reasons */
.section-title {
    font-family: var(--font-jp);
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 60px;
    position: relative;
    padding-bottom: 20px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--color-gold);
}

.reasons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.reason-card {
    background: var(--color-bg-alt);
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s ease;
    border: 1px solid var(--color-border);
}

.text-dark-grid .reason-card {
    background: #fff;
    border: none;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.reason-card:hover {
    transform: translateY(-10px);
    border-color: var(--color-gold);
}

.icon-box {
    font-size: 3rem;
    color: var(--color-gold);
    margin-bottom: 20px;
}

.reason-card h4 {
    font-size: 1.4rem;
    margin-bottom: 15px;
}

.reason-card p {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin-bottom: 0;
}

.text-dark-grid .reason-card p {
    color: #666;
}

/* Features (ANC & Sound) */
.feature-layout {
    display: flex;
    align-items: center;
    gap: 60px;
}

.feature-layout.reverse {
    flex-direction: row-reverse;
}

.feature-text {
    flex: 1;
}

.feature-image {
    flex: 1;
}

.feature-image img {
    border-radius: 10px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.feature-title {
    font-size: 2rem;
    margin-bottom: 30px;
    color: var(--color-gold);
}

.feature-list {
    margin-top: 30px;
}

.feature-list li {
    margin-bottom: 15px;
    padding-left: 20px;
    position: relative;
}

.feature-list li::before {
    content: '•';
    color: var(--color-gold);
    position: absolute;
    left: 0;
    font-weight: bold;
}

.feature-list strong {
    color: var(--color-text);
}

/* Lifestyle Grid */
.lifestyle-grid-section {
    width: 100%;
    overflow: hidden;
}

.lifestyle-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    width: 100%;
}

.lifestyle-item {
    position: relative;
    height: 600px;
    /* Tall vertical images */
    overflow: hidden;
}

.lifestyle-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

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

.lifestyle-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.3) 50%, rgba(0, 0, 0, 0) 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 40px;
    color: #fff;
    opacity: 0.9;
    transition: opacity 0.3s ease;
}

.lifestyle-overlay h4 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    font-weight: 700;
    color: var(--color-gold);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.lifestyle-overlay p {
    font-size: 1.1rem;
    margin-bottom: 0;
    line-height: 1.6;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    max-width: 90%;
}

/* Response for Grid */
@media (max-width: 900px) {
    .lifestyle-grid {
        grid-template-columns: 1fr;
    }

    .lifestyle-item {
        height: 400px;
    }
}


/* Tech Specs */
.specs-table-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

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

.specs-table th,
.specs-table td {
    padding: 15px;
    border-bottom: 1px solid var(--color-border);
    text-align: left;
}

.specs-table th {
    width: 30%;
    color: var(--color-text-muted);
    font-weight: 500;
}

/* FAQ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--color-border);
}

.faq-question {
    width: 100%;
    padding: 20px;
    background: none;
    border: none;
    color: var(--color-text);
    text-align: left;
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: color 0.3s;
}

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

.faq-question .icon {
    font-size: 1.5rem;
    color: var(--color-gold);
    transition: transform 0.3s;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    padding: 0 20px;
}

.faq-answer p {
    color: var(--color-text-muted);
    margin: 20px 0;
}

.faq-item.active .faq-answer {
    max-height: 300px;
    /* Approximate max height */
}

.faq-item.active .icon {
    transform: rotate(45deg);
}

/* Closing */
.closing {
    position: relative;
    text-align: center;
    padding: 120px 0;
    color: #fff;
    overflow: hidden;
}

.closing-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.closing-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.4);
}

.closing-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
}

.closing-headline {
    font-size: 3rem;
    margin-bottom: 20px;
}

.closing-subline {
    font-size: 1.2rem;
    margin-bottom: 40px;
    color: #ddd;
}

.price-tag {
    margin-bottom: 40px;
    font-family: var(--font-en);
}

.price-tag .label {
    font-size: 1rem;
    margin-right: 10px;
}

.price-tag .price {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-gold);
}

.price-tag .tax {
    font-size: 1rem;
}

/* Color Variations */
.colors {
    width: 100%;
}

.color-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.color-card {
    background: #fff;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
    text-align: center;
}

.color-card:hover {
    transform: translateY(-10px);
}

.color-img-box {
    background: #f9f9f9;
    padding: 20px;
    text-align: center;
    cursor: pointer;
    overflow: hidden;
    /* Contain the zoomed image */
}

.color-img-box img {
    max-width: 80%;
    margin: 0 auto;
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.1));
    transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1);
    transform-origin: center center;
}

.color-img-box:hover img,
.color-img-box.zoomed img {
    transform: scale(1.3);
}

.color-info {
    padding: 25px;
}

.color-name {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: #111;
}

.color-desc {
    font-size: 0.95rem;
    color: #666;
    margin-bottom: 0;
}

/* Footer */
.footer {
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.9rem;
}


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

    .hero-headline {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .feature-layout,
    .feature-layout.reverse {
        flex-direction: column;
        gap: 30px;
    }

    .closing-headline {
        font-size: 2rem;
    }

    .price-tag .price {
        font-size: 2.2rem;
    }

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