/* リセットとベース設定 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Serif JP', '游明朝', 'Yu Mincho', YuMincho, 'Hiragino Mincho ProN', 'HG明朝E', serif;
    font-size: 15px;
    line-height: 2.0;
    color: #555;
    background-color: #fafafa;
    font-weight: 400;
    width: 100%;
    overflow-x: hidden;
}

/* SEO用：視覚的に非表示だが、スクリーンリーダーと検索エンジンには認識される */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* メインコンテナ - 全ページで統一された中央寄せ */
main,
.main-wrapper {
    width: 100%;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

/* 共通コンテナ - 全ページで統一された中央寄せ */
.container {
    width: 100%;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 4rem;
    padding-right: 4rem;
}

.page-container {
    width: 100%;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 4rem;
    padding-right: 4rem;
}

.content-container {
    width: 100%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.narrow-container {
    width: 100%;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* ブロック要素（画像・ボタン）の中央配置 */
.block-center {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.image-center {
    display: block;
    max-width: 100%;
    height: auto;
    margin-left: auto;
    margin-right: auto;
}

/* 文章は左揃えを維持 */
.text-content {
    text-align: left;
}

/* ヘッダー・ナビゲーション */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid #e8e8e8;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.nav-container {
    width: 100%;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
    padding: 1.5rem 4rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 18px;
    font-weight: 400;
    letter-spacing: 0.02em;
    color: #333;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 3rem;
}

.nav-menu a {
    text-decoration: none;
    color: #555;
    font-size: 14px;
    letter-spacing: 0;
    transition: color 0.3s ease;
    font-weight: 400;
}

.nav-menu a:hover {
    color: #333;
}

/* ヒーローセクション */
.hero {
    margin-top: 80px;
    padding: 10rem 4rem;
    background-color: #ffffff;
    text-align: center;
    width: 100%;
}

.hero-content {
    width: 100%;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    align-items: center;
}

.subtitle {
    font-family: 'Montserrat', sans-serif;
    font-size: 12px;
    letter-spacing: 0.25em;
    color: #777;
    margin-bottom: 2.5rem;
    font-weight: 300;
    text-transform: uppercase;
}

.main-title {
    font-size: 48px;
    font-weight: 400;
    letter-spacing: 0.03em;
    margin-bottom: 2.5rem;
    line-height: 1.8;
    color: #333;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    align-items: center;
}

.hero-description {
    font-size: 15px;
    color: #555;
    line-height: 2.0;
    font-weight: 400;
    margin-bottom: 3rem;
    letter-spacing: 0;
    text-align: center;
}

.btn-primary {
    padding: 1rem 3rem;
    background-color: #333;
    color: #ffffff;
    text-decoration: none;
    font-size: 14px;
    letter-spacing: 0;
    transition: all 0.3s ease;
    border: 1px solid #333;
    font-weight: 400;
}

.btn-primary:hover {
    background-color: #4a4a4a;
    border-color: #4a4a4a;
}

.btn-secondary {
    padding: 1rem 3rem;
    background-color: transparent;
    color: #333;
    text-decoration: none;
    font-size: 14px;
    letter-spacing: 0;
    transition: all 0.3s ease;
    border: 1px solid #333;
    font-weight: 400;
}

.btn-secondary:hover {
    background-color: #333;
    color: #ffffff;
}

/* セクション共通スタイル */
section {
    width: 100%;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
    padding: 8rem 4rem;
}

/* 画面幅100%で表示する要素用 */
.full-width {
    width: 100%;
    max-width: 100%;
    margin-left: 0;
    margin-right: 0;
    padding-left: 0 !important;
    padding-right: 0 !important;
}

/* 代表作セクション */
.featured-work {
    padding: 12rem 0;
    background-color: #fafafa;
    width: 100%;
    max-width: 100%;
}

.featured-work-container {
    width: 100%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 4rem;
    padding-right: 4rem;
}

.featured-work-image {
    width: 64%;
    max-width: 64%;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 2rem;
    display: block;
}

.featured-work-image img {
    width: 100%;
    max-width: 100%;
    height: auto;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.featured-work-caption {
    font-size: 13px;
    color: #777;
    text-align: center;
    letter-spacing: 0.2em;
    font-weight: 300;
    width: 100%;
}

.section-header {
    text-align: center;
    margin-bottom: 6rem;
}

.section-label {
    font-family: 'Montserrat', sans-serif;
    font-size: 12px;
    letter-spacing: 0.25em;
    color: #777;
    margin-bottom: 1rem;
    font-weight: 300;
    text-transform: uppercase;
}

.section-title {
    font-size: 24px;
    font-weight: 400;
    letter-spacing: 0.01em;
    margin-bottom: 2rem;
    color: #333;
}

.section-subtitle {
    font-family: 'Montserrat', sans-serif;
    font-size: 13px;
    color: #777;
    margin-bottom: 2rem;
    font-weight: 300;
    letter-spacing: 0.2em;
}

.section-description {
    font-size: 15px;
    color: #555;
    line-height: 2.0;
    font-weight: 400;
    letter-spacing: 0;
    text-align: center;
}

/* 作品セクション */
.works {
    background-color: #ffffff;
    padding: 8rem 6rem;
    width: 100%;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.works-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 5rem 4rem;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.work-item {
    display: flex;
    flex-direction: column;
}

.work-image {
    width: 100%;
    max-width: 100%;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background-color: #f5f5f5;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
    display: block;
}

.work-image img {
    width: 100%;
    max-width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
    display: block;
}

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

.work-info {
    padding: 0 0.5rem;
}

.work-title {
    font-size: 16px;
    font-weight: 400;
    letter-spacing: 0.01em;
    margin-bottom: 0.5rem;
    color: #333;
}

.work-detail {
    font-size: 13px;
    color: #777;
    letter-spacing: 0.2em;
    font-weight: 300;
}

/* プロフィールセクション */
.profile {
    background-color: #fafafa;
}

.profile-content {
    width: 100%;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.profile-text {
    font-size: 15px;
    line-height: 2.0;
    margin-bottom: 2rem;
    color: #555;
    font-weight: 400;
    letter-spacing: 0;
    text-align: left;
}

.profile-detail {
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 1px solid #e0e0e0;
}

.profile-detail h3 {
    font-size: 18px;
    font-weight: 400;
    letter-spacing: 0.01em;
    margin-bottom: 1.5rem;
    color: #333;
}

.profile-detail ul {
    list-style: none;
}

.profile-detail li {
    font-size: 15px;
    color: #555;
    margin-bottom: 0.8rem;
    padding-left: 1.2rem;
    position: relative;
    font-weight: 400;
    letter-spacing: 0;
    text-align: left;
}

.profile-detail li:before {
    content: '・';
    position: absolute;
    left: 0;
    top: 0;
    color: #999;
}

/* 絵画教室セクション */
.class {
    background-color: #ffffff;
}

.class-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 4rem;
    width: 100%;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.class-info-block {
    text-align: center;
    padding: 2rem;
}

.class-icon {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.class-info-block h3 {
    font-size: 18px;
    font-weight: 400;
    letter-spacing: 0.01em;
    margin-bottom: 1.5rem;
    color: #333;
}

.class-info-block p {
    font-size: 15px;
    color: #555;
    margin-bottom: 0.5rem;
    font-weight: 400;
    letter-spacing: 0;
}

.class-info-block .note {
    font-size: 13px;
    color: #777;
    margin-top: 1rem;
    letter-spacing: 0;
}

/* お問い合わせセクション */
.contact {
    background-color: #fafafa;
}

.contact-content {
    width: 100%;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.contact-block {
    background-color: #ffffff;
    border: 1px solid #e8e8e8;
    padding: 3rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 2rem;
    padding: 2rem 0;
}

.contact-item:first-child {
    padding-top: 0;
    border-bottom: 1px solid #f0f0f0;
}

.contact-item:last-child {
    padding-bottom: 0;
}

.contact-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.contact-detail {
    text-align: left;
    flex-grow: 1;
}

.contact-label {
    font-family: 'Montserrat', sans-serif;
    font-size: 12px;
    color: #777;
    margin-bottom: 0.5rem;
    letter-spacing: 0.25em;
    font-weight: 300;
    text-transform: uppercase;
}

.contact-link {
    font-family: 'Montserrat', sans-serif;
    font-size: 14px;
    color: #555;
    text-decoration: none;
    letter-spacing: 0;
    transition: color 0.3s ease;
    font-weight: 400;
}

.contact-link:hover {
    color: #333;
}

.contact-text {
    font-size: 14px;
    color: #555;
    font-weight: 400;
    letter-spacing: 0;
}

/* フッター */
footer {
    background-color: #ffffff;
    border-top: 1px solid #e8e8e8;
    padding: 3rem 4rem;
    text-align: center;
}

.social-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    margin-bottom: 2.5rem;
}

.social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #999;
    transition: color 0.3s ease, opacity 0.3s ease;
    text-decoration: none;
}

.social-icon:hover {
    color: #555;
    opacity: 0.8;
}

.social-icon svg {
    width: 24px;
    height: 24px;
    display: block;
}

footer p {
    font-family: 'Montserrat', sans-serif;
    font-size: 12px;
    color: #777;
    letter-spacing: 0.2em;
    font-weight: 300;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    body {
        width: 100%;
        overflow-x: hidden;
    }
    
    /* セクション共通 - モバイル（見た目の中央補正） */
    section {
        width: 100%;
        max-width: 100%;
        padding-left: 19px;
        padding-right: 25px;
    }
    
    /* コンテナ - モバイル（見た目の中央補正） */
    .container,
    .page-container,
    .profile-content,
    .class-content,
    .contact-content,
    .works {
        width: 100%;
        max-width: 1000px;
        margin-left: auto;
        margin-right: auto;
        padding-left: 19px;
        padding-right: 25px;
    }
    
    /* 画像の中央配置 */
    .image-center,
    .featured-work-image,
    .work-image,
    .featured-work-image img,
    .work-image img {
        display: block;
        width: 100%;
        max-width: 100%;
        height: auto;
        margin-left: auto;
        margin-right: auto;
    }
    
    .nav-container {
        width: 100%;
        padding: 1.2rem 25px 1.2rem 19px;
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .nav-menu {
        gap: 1.5rem;
    }
    
    .nav-menu a {
        font-size: 13px;
    }
    
    /* ヒーローセクション - 中央揃え統一 */
    .hero {
        width: 100%;
        padding: 6rem 25px 1.5rem 19px;
        text-align: center;
    }
    
    .hero-content {
        width: 100%;
        max-width: 100%;
        padding: 0;
        margin-left: auto;
        margin-right: auto;
    }
    
    .subtitle {
        font-size: 11px;
        margin-bottom: 1.8rem;
    }
    
    .main-title {
        font-size: 30px;
        font-weight: 500;
        letter-spacing: 0.08em;
        line-height: 1.8;
        margin-bottom: 1.8rem;
        margin-left: auto;
        margin-right: auto;
    }
    
    /* ヒーロー説明文は中央揃え */
    .hero-description {
        font-size: 14px;
        line-height: 2.0;
        margin-bottom: 3rem;
        margin-left: auto;
        margin-right: auto;
        text-align: center;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
        max-width: 260px;
        margin-left: auto;
        margin-right: auto;
        gap: 1rem;
        display: flex;
        justify-content: center;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        max-width: 100%;
        padding: 0.85rem 2.5rem;
        font-size: 13px;
    }
    
    /* 代表作セクション - 中央揃え統一 */
    .featured-work {
        width: 100%;
        padding: 3rem 0 10rem;
        max-width: 100%;
        text-align: center;
    }
    
    .featured-work-container {
        width: 100%;
        max-width: 100%;
        padding: 0;
        margin-left: auto;
        margin-right: auto;
    }
    
    /* 代表作画像 - 中央配置を維持 */
    .featured-work-image {
        width: 100%;
        max-width: 100%;
        margin-left: auto;
        margin-right: auto;
        margin-bottom: 2rem;
        display: block;
        padding: 0;
    }
    
    .featured-work-image img {
        width: 100%;
        max-width: 100%;
        height: auto;
        display: block;
        margin-left: auto;
        margin-right: auto;
    }
    
    .featured-work-caption {
        font-size: 12px;
        padding: 0 25px 0 19px;
        letter-spacing: 0.25em;
        margin-left: auto;
        margin-right: auto;
        text-align: center;
        width: 100%;
    }
    
    /* WORKSセクション */
    .works {
        padding: 9rem 25px 6rem 19px;
    }
    
    .works-grid {
        width: 100%;
        padding: 0;
        grid-template-columns: 1fr;
        gap: 4rem;
    }
    
    .section-header {
        margin-bottom: 5rem;
    }
    
    /* その他のセクション */
    section {
        padding: 6rem 25px 6rem 19px;
    }
    
    .class-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .contact-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 1rem;
    }
    
    .contact-detail {
        text-align: center;
    }
    
    /* フッター - モバイル */
    footer {
        padding: 3rem 25px 3rem 19px;
    }
    
    .social-links {
        gap: 2.5rem;
        margin-bottom: 2rem;
    }
    
    .social-icon svg {
        width: 22px;
        height: 22px;
    }
}

@media (max-width: 480px) {
    body {
        width: 100%;
        overflow-x: hidden;
    }
    
    /* セクション共通 - 小画面（見た目の中央補正） */
    section {
        width: 100%;
        max-width: 100%;
        padding-left: 15px;
        padding-right: 21px;
    }
    
    /* コンテナ - 小画面（見た目の中央補正） */
    .container,
    .page-container,
    .profile-content,
    .class-content,
    .contact-content,
    .works {
        width: 100%;
        max-width: 1000px;
        margin-left: auto;
        margin-right: auto;
        padding-left: 15px;
        padding-right: 21px;
    }
    
    /* 画像の中央配置 */
    .image-center,
    .featured-work-image,
    .work-image,
    .featured-work-image img,
    .work-image img {
        display: block;
        width: 100%;
        max-width: 100%;
        height: auto;
        margin-left: auto;
        margin-right: auto;
    }
    
    /* ヒーローセクション - 中央揃え統一（小画面） */
    .hero {
        width: 100%;
        padding: 5rem 21px 1rem 15px;
        text-align: center;
    }
    
    .hero-content {
        width: 100%;
        max-width: 100%;
        padding: 0;
        margin-left: auto;
        margin-right: auto;
    }
    
    .subtitle {
        font-size: 10px;
        letter-spacing: 0.2em;
        margin-bottom: 1.5rem;
    }
    
    .main-title {
        font-size: 26px;
        font-weight: 500;
        letter-spacing: 0.06em;
        margin-bottom: 1.5rem;
        margin-left: auto;
        margin-right: auto;
    }
    
    /* ヒーロー説明文は中央揃え（小画面） */
    .hero-description {
        font-size: 14px;
        line-height: 1.95;
        margin-bottom: 2.8rem;
        margin-left: auto;
        margin-right: auto;
        text-align: center;
    }
    
    .hero-buttons {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        width: 100%;
        max-width: 240px;
        gap: 0.8rem;
        margin-left: auto;
        margin-right: auto;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        padding: 0.8rem 2rem;
        font-size: 12px;
        opacity: 0.9;
    }
    
    /* 代表作セクション - 小画面 */
    .featured-work {
        width: 100%;
        padding: 2.5rem 0 12rem;
        text-align: center;
    }
    
    .featured-work-container {
        width: 100%;
        padding: 0;
        margin-left: auto;
        margin-right: auto;
    }
    
    .featured-work-image {
        width: 100%;
        max-width: 100%;
        margin-left: auto;
        margin-right: auto;
        margin-bottom: 2rem;
        display: block;
        padding: 0;
    }
    
    .featured-work-image img {
        width: 100%;
        max-width: 100%;
        height: auto;
        display: block;
        margin-left: auto;
        margin-right: auto;
    }
    
    .featured-work-caption {
        font-size: 11px;
        padding: 0 21px 0 15px;
        letter-spacing: 0.2em;
        opacity: 0.85;
        text-align: center;
        width: 100%;
    }
    
    /* WORKSセクション - 小画面 */
    .works {
        padding: 9rem 21px 5rem 15px;
    }
    
    .works-grid {
        width: 100%;
        padding: 0;
        grid-template-columns: 1fr;
    }
    
    .section-header {
        margin-bottom: 4.5rem;
    }
    
    .section-title {
        font-size: 22px;
    }
    
    .section-label {
        font-size: 11px;
    }
    
    .section-description {
        font-size: 14px;
    }
    
    /* フッター - 小画面 */
    footer {
        padding: 2.5rem 21px 2.5rem 15px;
    }
    
    .social-links {
        gap: 2rem;
        margin-bottom: 1.8rem;
    }
    
    .social-icon svg {
        width: 20px;
        height: 20px;
    }
    
    footer p {
        font-size: 11px;
    }
}