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

:root {
    --bg: #0a0a0a;
    --text: #ffffff;
    --text-dim: #888888;
    --border: #1a1a1a;
    --accent: #ffffff;
}

[data-theme="light"] {
    --bg: #ffffff;
    --text: #0a0a0a;
    --text-dim: #666666;
    --border: #f0f0f0;
    --accent: #0a0a0a;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: 200;
    background: var(--border);
    border: 1px solid var(--text-dim);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    color: var(--text);
}

.theme-toggle:hover {
    transform: scale(1.1);
    border-color: var(--text);
}

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

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

[data-theme="light"] .theme-toggle .sun-icon {
    display: block;
}

[data-theme="light"] .theme-toggle .moon-icon {
    display: none;
}

@media (max-width: 768px) {
    .theme-toggle {
        top: 1rem;
        right: 1rem;
        width: 44px;
        height: 44px;
    }
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 2rem;
}

@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
}

/* Header */
header {
    padding: 4rem 0 3rem;
    text-align: center;
    position: relative;
}

@media (max-width: 768px) {
    header {
        padding: 3rem 0 2rem;
    }
}

h1 {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.03em;
}

.tagline {
    color: var(--text-dim);
    font-size: 1rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

/* Side Navigation */
.side-nav {
    position: fixed;
    left: 2rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.side-nav a {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: color 0.3s;
    writing-mode: vertical-rl;
    text-orientation: mixed;
}

.side-nav a:hover,
.side-nav a.active {
    color: var(--text);
}

/* Sections */
section {
    padding: 2rem 0 6rem;
    display: none;
}

section.active {
    display: block;
}

@media (max-width: 768px) {
    section {
        padding: 1rem 0 5rem;
    }
}

/* Masonry Grid */
.masonry-grid {
    column-count: 3;
    column-gap: 1.5rem;
    padding-top: 2rem;
}

@media (max-width: 1200px) {
    .masonry-grid { column-count: 2; }
}

@media (max-width: 768px) {
    .masonry-grid { column-count: 1; }
    .side-nav { display: none; }
}

.grid-item {
    break-inside: avoid;
    margin-bottom: 1.5rem;
    position: relative;
    cursor: pointer;
    overflow: hidden;
    border-radius: 4px;
}

.grid-item img {
    width: 100%;
    display: block;
    transition: transform 0.6s cubic-bezier(0.23, 1, 0.32, 1);
}

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

.item-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    padding: 1.5rem;
    background: linear-gradient(180deg, rgba(0,0,0,0.7) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.3s;
}

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

.item-number {
    font-size: 0.75rem;
    color: var(--text-dim);
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}

.item-id {
    font-size: 0.75rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.item-title {
    font-size: 1rem;
    font-weight: 500;
    margin-top: 0.25rem;
}

/* Shop Grid */
.shop-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: 2rem;
    padding-top: 2rem;
}

@media (max-width: 768px) {
    .shop-grid {
        grid-template-columns: 1fr;
    }
}

.shop-card {
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s;
}

.shop-card:hover {
    transform: translateY(-4px);
}

.shop-card img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
}

.shop-info {
    padding: 1.5rem;
}

.shop-number {
    font-size: 0.75rem;
    color: var(--text-dim);
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}

.shop-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.shop-desc {
    color: var(--text-dim);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.shop-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.price {
    font-size: 1.5rem;
    font-weight: 700;
}

.btn {
    background: var(--text);
    color: var(--bg);
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 2px;
    cursor: pointer;
    font-weight: 600;
    transition: opacity 0.2s;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.btn:hover {
    opacity: 0.8;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.95);
    z-index: 1000;
    padding: 2rem;
    overflow-y: auto;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--border);
    max-width: 1400px;
    width: 100%;
    border-radius: 4px;
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 0;
    max-height: 90vh;
    overflow: hidden;
}

@media (max-width: 1024px) {
    .modal-content {
        grid-template-columns: 1fr;
        max-height: none;
    }
}

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

.modal-info {
    padding: 3rem;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

@media (max-width: 768px) {
    .modal-info {
        padding: 2rem 1.5rem;
    }

    .modal {
        padding: 1rem;
    }
}

.modal-close {
    position: fixed;
    top: 2rem;
    right: 2rem;
    background: var(--text);
    color: var(--bg);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1001;
    transition: opacity 0.2s;
}

.modal-close:hover {
    opacity: 0.8;
}

.modal-number {
    font-size: 0.75rem;
    color: var(--text-dim);
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.modal-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

@media (max-width: 768px) {
    .modal-title {
        font-size: 1.75rem;
    }

    .modal-price {
        font-size: 1.5rem;
    }
}

.modal-price {
    font-size: 2rem;
    margin-bottom: 2rem;
}

.modal-desc {
    color: var(--text-dim);
    margin-bottom: 2rem;
    line-height: 1.8;
}

/* About Section */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    padding-top: 2rem;
}

.about-content p {
    font-size: 1.2rem;
    color: var(--text-dim);
    margin-bottom: 2rem;
    line-height: 1.8;
}

@media (max-width: 768px) {
    .about-content p {
        font-size: 1rem;
    }
}

/* Contact Section */
.contact-content {
    max-width: 600px;
    margin: 0 auto;
    padding-top: 2rem;
}

.contact-item {
    margin-bottom: 2rem;
    padding: 2rem;
    background: var(--border);
    border-radius: 4px;
}

.contact-item strong {
    display: block;
    margin-bottom: 0.75rem;
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-dim);
}

.contact-item a {
    color: var(--text);
    text-decoration: none;
    font-size: 1.2rem;
    transition: opacity 0.2s;
}

.contact-item a:hover {
    opacity: 0.7;
}

.contact-item p {
    color: var(--text-dim);
    font-size: 1.1rem;
}

@media (max-width: 768px) {
    .contact-item {
        padding: 1.5rem;
    }

    .contact-item a {
        font-size: 1rem;
    }

    .contact-item p {
        font-size: 0.95rem;
    }
}

/* Mobile Nav */
.mobile-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--border);
    padding: 1rem;
    z-index: 100;
    border-top: 1px solid var(--bg);
}

@media (max-width: 768px) {
    .mobile-nav {
        display: flex;
        justify-content: space-around;
    }
}

.mobile-nav a {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: color 0.3s;
}

.mobile-nav a.active {
    color: var(--text);
}

/* Footer */
footer {
    text-align: center;
    padding: 4rem 0;
    color: var(--text-dim);
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

@media (max-width: 768px) {
    footer {
        padding: 3rem 0 6rem;
        font-size: 0.75rem;
    }
}