/* リセット & ベーススタイル */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #000000;
    --secondary-color: #1a1a1a;
    --accent-color: #ff6b35;
    --text-color: #ffffff;
    --text-secondary: #cccccc;
    --border-color: #333333;
    --hover-color: #ff8c5a;
}

body {
    font-family: 'Helvetica Neue', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
    background-color: #ffffff;
    color: #000000;
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ヘッダー */
.header {
    background-color: #ffffff;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

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

.logo-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    text-decoration: none;
    color: inherit;
}

.logo-img {
    width: 50px;
    height: 50px;
    flex-shrink: 0;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: bold;
    color: #000000;
    margin: 0;
}

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

.nav-toggle span {
    width: 25px;
    height: 2px;
    background-color: #000000;
    margin: 3px 0;
    transition: 0.3s;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: #000000;
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s;
    position: relative;
}

.nav-menu a:hover {
    color: var(--accent-color);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: width 0.3s;
}

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

/* ヒーローセクション */
.hero {
    min-height: 80vh;
    padding: 4rem 0;
    background-color: #ffffff;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
}

.hero::before {
    display: none;
}

.hero .container {
    position: relative;
    z-index: 1;
    width: 100%;
}

.hero-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 3rem;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    color: var(--accent-color);
}

.hero-subtitle {
    font-size: 1.3rem;
    color: #000000;
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-image {
    flex: 1;
    max-width: 500px;
    margin-left: 2rem;
    background-color: #ffffff;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    background-color: #ffffff;
}

/* ボタン */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--accent-color);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: var(--hover-color);
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(255, 107, 53, 0.4);
}

.btn-secondary {
    background-color: transparent;
    color: #000000;
    border: 2px solid #000000;
}

.btn-secondary:hover {
    background-color: #000000;
    color: #ffffff;
}

/* セクション */
section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--accent-color);
    font-weight: bold;
}

.section-subtitle {
    text-align: center;
    color: #000000;
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

/* 業務内容セクション */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    background-color: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s;
    min-height: 400px;
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(255, 107, 53, 0.2);
    border-color: var(--accent-color);
}

.service-icon {
    width: 100%;
    height: 200px;
    margin-bottom: 1.5rem;
    border-radius: 8px;
    overflow: hidden;
    background-color: #ffffff;
}

.service-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.service-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.service-card p {
    color: #000000;
    line-height: 1.6;
    margin-top: auto;
}

/* CTAセクション */
.cta {
    background-color: #ffffff;
    text-align: center;
    padding: 4rem 0;
}

.cta h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.cta p {
    font-size: 1.2rem;
    color: #000000;
    margin-bottom: 2rem;
}

/* ページヘッダー */
.page-header {
    background-color: #ffffff;
    padding: 3rem 0;
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.page-header p {
    color: #000000;
    font-size: 1.1rem;
}

/* AI施工イメージ作成 */
.ai-image-section {
    padding: 4rem 0;
}

.ai-image-form-container {
    max-width: 800px;
    margin: 0 auto;
}

.ai-image-form {
    background-color: #ffffff;
    padding: 2.5rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.ai-image-form .btn {
    display: block;
    width: 100%;
    max-width: 400px;
    margin: 2rem auto 0;
    text-align: center;
}

.form-group {
    margin-bottom: 2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
    color: #000000;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    background-color: #ffffff;
    color: #000000;
    border: 1px solid #cccccc;
    border-radius: 5px;
    font-size: 1rem;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.file-upload-wrapper {
    position: relative;
}

.file-upload-wrapper input[type="file"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.file-upload-label {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: #ffffff;
    border: 2px dashed var(--border-color);
    border-radius: 5px;
    cursor: pointer;
    text-align: center;
    transition: all 0.3s;
}

.file-upload-label:hover {
    border-color: var(--accent-color);
    background-color: #f5f5f5;
}

.image-preview {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 1rem;
}

.image-preview img {
    width: 512px;
    height: 512px;
    object-fit: cover;
    border-radius: 5px;
    border: 1px solid var(--border-color);
    display: block;
    margin: 0 auto;
}

.result-section {
    margin-top: 3rem;
    background-color: #ffffff;
    padding: 2.5rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.result-section h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--accent-color);
    text-align: center;
}

.result-image-container {
    text-align: center;
}

.result-image {
    display: block;
    max-width: 100%;
    margin: 0 auto 1rem auto;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.result-note {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-style: italic;
}

/* マスク編集モーダル */
.mask-modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    overflow: auto;
}

.mask-modal-content {
    background-color: var(--secondary-color);
    margin: 2% auto;
    padding: 1.5rem;
    border-radius: 10px;
    max-width: min(90%, 1200px);
    max-height: 90vh;
    position: relative;
    display: flex;
    flex-direction: column;
}

.mask-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.mask-modal-header h3 {
    margin: 0;
    color: var(--text-color);
}

.mask-modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-color);
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    line-height: 30px;
}

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

.mask-modal-body {
    text-align: center;
    overflow: auto;
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.mask-tools {
    margin-bottom: 1rem;
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.mask-tools .btn {
    padding: 0.5rem 1.5rem;
    font-size: 0.9rem;
}

#maskCanvas {
    width: 512px;
    height: 512px;
    max-width: 100%;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    cursor: crosshair;
    background-color: var(--primary-color);
    object-fit: contain;
    display: block;
    margin: 0 auto;
}

.loading-message {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--accent-color);
    font-size: 1.2rem;
}

.loading-message p {
    margin-top: 1rem;
    margin-bottom: 0;
}

/* スピナー（ぐるぐる） */
.spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-left-color: var(--accent-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* 施工までの流れ */
.flow-section {
    padding: 4rem 0;
}

.flow-steps {
    max-width: 900px;
    margin: 0 auto;
}

.flow-step {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
    align-items: flex-start;
    max-width: 100%;
    overflow: hidden;
}

.flow-step:nth-child(even) {
    flex-direction: row-reverse;
}

.flow-number {
    font-size: 3rem;
    font-weight: bold;
    color: var(--accent-color);
    min-width: 80px;
    text-align: center;
}

.flow-content {
    flex: 1;
}

.flow-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.flow-content p {
    color: #000000;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.flow-image {
    width: 100%;
    max-width: 100%;
    aspect-ratio: 1 / 1;
    border-radius: 8px;
    overflow: hidden;
    background-color: #ffffff;
}

/* PC表示時は画像を1/4程度のサイズに */
@media (min-width: 769px) {
    .flow-image {
        max-width: 35%;
        margin: 0 auto;
    }
}

.flow-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.flow-cta {
    text-align: center;
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 1px solid var(--border-color);
}

.flow-cta h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--accent-color);
}

/* よくあるご質問 */
.faq-section {
    padding: 4rem 0;
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background-color: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 1rem;
    overflow: hidden;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    cursor: pointer;
    transition: background-color 0.3s;
}

.faq-question:hover {
    background-color: #f5f5f5;
}

.faq-question h3 {
    font-size: 1.2rem;
    font-weight: normal;
    color: #000000;
}

.faq-toggle {
    font-size: 1.5rem;
    color: var(--accent-color);
    transition: transform 0.3s;
}

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

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

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 1.5rem 1.5rem;
    color: #000000;
    line-height: 1.8;
}

.faq-cta {
    text-align: center;
    margin-top: 3rem;
    padding-top: 3rem;
    border-top: 1px solid var(--border-color);
}

/* 会社概要 */
.company-section {
    padding: 4rem 0;
}

.company-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 4rem;
}

.company-detail h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--accent-color);
}

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

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

.company-table th {
    width: 30%;
    color: var(--accent-color);
    font-weight: bold;
}

.company-table td {
    color: #000000;
}

.company-table a {
    color: var(--accent-color);
    text-decoration: none;
}

.company-table a:hover {
    text-decoration: underline;
}

.company-image {
    width: 100%;
    height: 400px;
    border-radius: 10px;
    overflow: hidden;
    background-color: #ffffff;
}

.company-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.business-content {
    margin-bottom: 4rem;
}

.business-content h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--accent-color);
}

.business-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.business-list li {
    padding: 1rem;
    background-color: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    color: #000000;
}

.company-message h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--accent-color);
}

.message-content p {
    color: #000000;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

/* 価格表 */
.price-section {
    padding: 4rem 0;
}

.price-notice {
    background-color: #fff9e6;
    border: 1px solid var(--accent-color);
    border-radius: 5px;
    padding: 1rem;
    margin-bottom: 2rem;
}

.price-notice p {
    color: #000000;
    margin: 0;
    font-size: 0.9rem;
}

.price-table-wrapper {
    margin-bottom: 4rem;
}

.price-table-wrapper h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--accent-color);
}

.price-table {
    width: 100%;
    border-collapse: collapse;
    background-color: #ffffff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.price-table thead {
    background-color: var(--accent-color);
}

.price-table th {
    padding: 1rem;
    text-align: left;
    color: #ffffff;
    font-weight: bold;
    border-bottom: 2px solid rgba(255, 255, 255, 0.3);
}

.price-table th:first-child {
    border-top-left-radius: 5px;
}

.price-table th:last-child {
    border-top-right-radius: 5px;
}

.price-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    color: #000000;
}

.price-table tbody tr:hover {
    background-color: #fff9e6;
}

.price-table tbody tr:last-child td {
    border-bottom: none;
}

.price-contact {
    background-color: #ffffff;
    padding: 2rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.price-contact h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--accent-color);
}

.price-contact p {
    color: #000000;
    line-height: 1.8;
    margin-bottom: 1rem;
}

.price-contact a {
    color: var(--accent-color);
    text-decoration: none;
}

.price-contact a:hover {
    text-decoration: underline;
}

/* お問い合わせ */
.contact-section {
    padding: 4rem 0;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
}

.contact-info h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--accent-color);
}

.contact-detail {
    margin-bottom: 2.5rem;
}

.contact-detail h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.contact-phone {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.contact-phone a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: bold;
}

.contact-phone a:hover {
    text-decoration: underline;
}

.contact-hours {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.contact-detail p {
    color: #000000;
    line-height: 1.8;
}

.contact-form-wrapper {
    background-color: #ffffff;
    padding: 2.5rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.alert {
    padding: 1rem;
    border-radius: 5px;
    margin-bottom: 1.5rem;
}

.alert-success {
    background-color: rgba(76, 175, 80, 0.2);
    border: 1px solid #4caf50;
    color: #4caf50;
}

.alert-error {
    background-color: rgba(244, 67, 54, 0.2);
    border: 1px solid #f44336;
    color: #f44336;
}

.required {
    color: var(--accent-color);
}

/* フッター */
.footer {
    background-color: #ffffff;
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 1rem;
    margin-top: 5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.footer-logo-img {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
}

.footer-section h3,
.footer-section h4 {
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.footer-logo h3 {
    margin: 0;
}

.footer-section p {
    color: #000000;
    line-height: 1.8;
}

.footer-section a {
    color: #000000;
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-menu {
    list-style: none;
}

.footer-menu li {
    margin-bottom: 0.5rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: #000000;
}

/* 画像のスタイル */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* レスポンシブデザイン */
@media (max-width: 1024px) {
    .hero-wrapper {
        flex-direction: column;
        text-align: center;
    }

    .hero-content {
        max-width: 100%;
        margin-bottom: 2rem;
    }

    .hero-image {
        max-width: 100%;
        width: 100%;
        margin-left: 0;
        margin-right: 0;
    }
    
    .hero-image img {
        margin: 0 auto;
    }

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

    .company-info {
        grid-template-columns: 1fr;
    }
    
    .company-image {
        margin: 0 auto;
        max-width: calc(100% - 2rem);
    }

    .contact-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: #ffffff;
        flex-direction: column;
        padding: 2rem;
        transition: left 0.3s;
        border-top: 1px solid var(--border-color);
    }

    .nav-menu.active {
        left: 0;
    }

    .logo-img {
        width: 40px;
        height: 40px;
    }

    .logo h1 {
        font-size: 1.2rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 2rem;
    }

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

    .flow-step {
        flex-direction: column !important;
    }

    .flow-number {
        min-width: auto;
    }

    .flow-image {
        aspect-ratio: 1 / 1;
    }

    .company-table th,
    .company-table td {
        display: block;
        width: 100%;
        border-bottom: none;
    }

    .company-table th {
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 0.5rem;
    }

    .business-list {
        grid-template-columns: 1fr;
    }

    .price-table-wrapper {
        overflow-x: auto;
    }

    .price-table {
        min-width: 600px;
    }

    .price-table th,
    .price-table td {
        padding: 0.75rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

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

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

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

    .ai-image-form,
    .contact-form-wrapper {
        padding: 1.5rem;
    }
}

/* マスク編集モーダル */
.mask-edit-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    z-index: 10000;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.mask-edit-container {
    background-color: var(--secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
}

.mask-edit-header {
    margin-bottom: 20px;
    text-align: center;
}

.mask-edit-header h2 {
    color: var(--text-color);
    margin-bottom: 10px;
    font-size: 1.5rem;
}

.mask-edit-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin: 0;
}

.mask-edit-canvas-wrapper {
    display: flex;
    justify-content: center;
    margin: 20px 0;
    background-color: #000;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 10px;
}

#maskCanvas {
    max-width: 100%;
    height: auto;
    cursor: crosshair;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    touch-action: none;
}

.mask-edit-controls {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.mask-edit-controls .btn {
    min-width: 100px;
    padding: 10px 20px;
}

.mask-edit-controls .btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* ギャラリーページ */
.gallery-section {
    padding: 4rem 0;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    background-color: #ffffff;
    border: 1px solid var(--border-color);
    aspect-ratio: 4 / 3;
}

.gallery-link {
    display: block;
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.gallery-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.gallery-icon {
    font-size: 2rem;
    color: var(--text-color);
}

.gallery-empty {
    text-align: center;
    padding: 4rem 0;
    color: var(--text-secondary);
}

/* ライトボックス */
.lightbox-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.95);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.lightbox-image {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 30px;
    color: var(--text-color);
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    z-index: 10001;
    transition: color 0.3s;
}

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

.lightbox-prev,
.lightbox-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-color);
    font-size: 50px;
    font-weight: bold;
    cursor: pointer;
    z-index: 10001;
    padding: 0 20px;
    transition: color 0.3s;
    user-select: none;
}

.lightbox-prev {
    left: 20px;
}

.lightbox-next {
    right: 20px;
}

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

.lightbox-caption {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--text-color);
    background-color: rgba(0, 0, 0, 0.7);
    padding: 10px 20px;
    border-radius: 4px;
    text-align: center;
}

@media (max-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 1rem;
    }

    .lightbox-prev,
    .lightbox-next {
        font-size: 30px;
        padding: 0 10px;
    }

    .lightbox-close {
        top: 10px;
        right: 15px;
        font-size: 30px;
    }
}