:root {
    --bg-color: #fcfaf7;
    /* Warm off-white */
    --text-color: #4a3b32;
    /* Deep brown */
    --accent-color: #8c7b70;
    /* Muted taupe */
    --gold-color: #c5a059;
    /* Muted gold */
    --font-main: 'Shippori Mincho', 'Noto Serif JP', 'Yu Mincho', serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 2.0;
    font-feature-settings: "palt";
    overflow-x: hidden;
}

/* Typography */
h1,
h2,
h3 {
    font-weight: 400;
    letter-spacing: 0.1em;
}

p {
    margin-bottom: 1em;
    letter-spacing: 0.05em;
}

/* Header */
.site-header {
    padding: 3rem 1rem;
    text-align: center;
}

.logo-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.header-logo {
    width: 140px;
    height: auto;
}

.site-title {
    font-size: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    white-space: nowrap;
    /* Prevent wrapping */
}

.site-subtitle {
    font-size: 0.9rem;
    color: var(--accent-color);
    margin-top: 0.5rem;
}

.site-category {
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    margin-bottom: 0.2rem;
    display: block;
    font-weight: normal;
    color: var(--text-color);
}

/* Concept Section */
.concept-section {
    position: relative;
    padding: 4rem 1rem 6rem;
    text-align: center;
    overflow: hidden;
}

.concept-image-wrapper {
    margin-bottom: 3rem;
    display: flex;
    justify-content: center;
}

.concept-bg {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    max-height: 60vh;
    object-fit: cover;
    filter: brightness(0.95) contrast(1.1);
    /* Enhance atmosphere */
}

.concept-content h2 {
    font-size: 2rem;
    color: var(--gold-color);
    margin-bottom: 3rem;
    font-family: 'Times New Roman', serif;
    /* English Serif for headers */
    font-style: italic;
}

.concept-text {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Product Section: Troika */
.product-level-1 {
    background-color: #f7f3ee;
    /* Slightly darker warm gray */
    padding: 6rem 1rem;
    text-align: center;
}

.section-title {
    margin-bottom: 4rem;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--gold-color);
    font-family: 'Times New Roman', serif;
    font-style: italic;
}

.section-logo {
    display: block;
    margin: 0 auto 0.5rem;
    max-width: 200px;
    height: auto;
}

.section-subtitle {
    display: block;
    margin-top: 1rem;
    font-size: 1.2rem;
}

.russian-title {
    display: block;
    font-size: 1rem;
    color: var(--accent-color);
    margin-top: 0.5rem;
}

.site-category {
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    margin-bottom: 0.2rem;
    display: block;
    font-weight: normal;
    color: var(--text-color);
}

.troika-showcase {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.troika-description {
    font-size: 1.05rem;
}

.troika-hero-img {
    width: 100%;
    max-width: 500px;
    height: auto;
    border-radius: 50% 50% 0 0;
    /* Arch shape */
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    filter: contrast(1.05) sepia(0.05);
    /* Slight pop and warmth */
}

/* Details Grid */
.product-details {
    padding: 6rem 1rem;
    background-color: var(--bg-color);
}

.detail-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4rem;
    max-width: 1000px;
    margin: 0 auto;
}

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

.img-frame {
    width: 200px;
    height: 200px;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    overflow: hidden;
    position: relative;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.img-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.img-frame:hover img {
    transform: scale(1.1);
}

.detail-item h3 {
    font-family: 'Times New Roman', serif;
    font-size: 1.2rem;
    color: var(--gold-color);
    margin-bottom: 0.2rem;
}

.detail-item .jp-name {
    font-size: 1rem;
    color: var(--text-color);
}

/* Visual Break */
.visual-break {
    padding: 4rem 1rem;
    text-align: center;
}

.break-img {
    max-width: 100%;
    max-height: 400px;
    object-fit: contain;
}

/* Footer */
.site-footer {
    background-color: #3e322b;
    color: #ae9d93;
    padding: 3rem 1rem;
    text-align: center;
}

.footer-logo {
    width: 50px;
    opacity: 0.8;
    margin-bottom: 1rem;
    filter: invert(1) brightness(0.8);
}

.footer-content p {
    font-size: 0.8rem;
    letter-spacing: 0.1em;
}

/* Utilities */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1s ease, transform 1s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (min-width: 768px) {
    .troika-showcase {
        flex-direction: row;
        justify-content: center;
        text-align: left;
    }

    .troika-description {
        flex: 1;
        max-width: 400px;
    }

    .troika-images {
        flex: 1;
        display: flex;
        justify-content: center;
    }

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