/* Selected Works Slider - カードの高さを統一 */
.selected-works-container .work-card {
    width: 280px !important;
    margin: 0 15px;
    flex-shrink: 0;
    height: 400px; /* 固定の高さを設定 */
    display: flex;
    flex-direction: column;
}

.selected-works-container .work-card .work-image {
    height: 200px; /* 画像エリアの高さを固定 */
    flex-shrink: 0;
}

.selected-works-container .work-card .work-content {
    flex: 1; /* 残りのスペースを均等に使用 */
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 0.8rem;
}

.selected-works-container .work-card .work-description {
    flex: 1; /* 説明文エリアを可変にして余白を埋める */
    overflow: hidden;
}

.selected-works-container .work-card .work-tags,
.selected-works-container .work-card .work-links {
    margin-top: auto; /* タグとリンクを下部に配置 */
}

.selected-works-container .slick-track {
    display: flex;
    align-items: stretch; /* カードの高さを揃える */
    margin-top: 20pt;
    margin-bottom: 20pt;
    padding-top: 20pt;
    padding-bottom: 20pt;
    border-top: var(--color-accent) 2px solid;
    border-bottom: var(--color-accent) 2px solid;
}

.selected-works-container .slick-slide {
    width: 280px !important;
    height: auto;
}

.slick-dots li {
  display: inline-block;
  margin: 0 2px;
}

.slick-list {
  margin: 0 -15px;
}
.slick-slide {
  margin: 0 15px;
  max-width: 200px;
}

/* 通常のリンク */
a {
    color: var(--color-primary); /* お好みの色に変更可 */
    font-weight: bold;
    text-decoration: none;
}

/* ホバー時のリンク */
a:hover,
a:focus {
    text-decoration: underline;
}

/* パララックスヘッダー */
.parallax-header {
    position: relative;
    overflow: hidden;
    background-image: url('../assets/images/background.png');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center center;
    will-change: background-position;
}
/* 業績カテゴリ件数リスト */
.achievements-summary-list {
    list-style-type: disc;
    padding-left: 2rem;
    margin-top: 0.8em;
    margin-bottom: 0.8em;
    text-align: left;
    color: var(--color-text);
    display: flex;
    flex-direction: column;
    gap: 0.2em;
}
.achievements-summary-list li {
    /* display: flex; を削除し、インライン配置はspanで調整 */
    font-size: 1.08em;
    color: var(--color-text);
    margin-top: 0.1em;
    margin-bottom: 0.1em;
}
.achievements-summary-label {
    color: #222;
    min-width: 140px;
    font-weight: 600;
    display: inline-block;
    margin-right: 0.5em;
}
.achievements-summary-count {
    color: var(--color-primary);
    font-weight: bold;
    margin-left: 0.1em;
    display: inline-block;
}

.profile-names {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 0.5rem;
    font-weight: bold;
    text-align: left;
}
.profile-name-left {
    position: relative;
    transition: color 0.2s;
}

.profile-name-left.marker,
.profile-name-right.marker {
    background: var(--color-primary);
    color: #fff;
    border-radius: 0;
    box-shadow: 0 2px 16px rgba(60, 60, 180, 0.10);
    transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}


.profile-name-divider {
    margin: 0 0.5rem;
    color: var(--color-gray);
}
.profile-name-right {
    color: var(--color-primary);
    position: relative;
    transition: color 0.2s, background 0.2s;
}
.profile-icon-left:hover ~ .profile-names .profile-name-left,
.profile-icon-left:focus ~ .profile-names .profile-name-left {
    color: var(--color-accent);
}
/* JSでホバー時にクラスを付与するためのスクリプト例（index.htmlの下部に追加可能） */
/* ===========================
   PROFILE ICONS ROW
   =========================== */
.profile-icons-row {
    display: flex;
    gap: 3rem;
    justify-content: center;
    align-items: center;
    margin-bottom: 2.5rem;
}

.profile-icon-link {
    display: inline-block;
    border-radius: 50%;
    box-shadow: 0 4px 16px rgba(0,0,0,0.18);
    transition: box-shadow 0.6s cubic-bezier(.4,0,.2,1), transform 0.05s ease-in;
    overflow: hidden;
    width: 180px !important;
    height: 180px !important;
    aspect-ratio: 1 / 1 !important;
    min-width: 120px;
    min-height: 120px;
}
.profile-icon-link:hover {
    box-shadow: 0 8px 32px rgba(0,0,0,0.28);
    transform: translateY(-2px) scale(1.05);
}

.profile-icon {
    width: 100% !important;
    height: 100% !important;
    aspect-ratio: 1 / 1 !important;
    object-fit: cover;
    border-radius: 50%;
    background: #fff;
    display: block;
    transition: filter 0.3s;
}
@media (max-width: 768px) {
    .profile-icons-row {
        gap: 1.5rem;
    }
}
/* ===========================
   RESET & BASE STYLES
   =========================== */

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

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
    /* Hide scrollbars in Firefox/IE/Edge (legacy) while keeping scroll */
    -ms-overflow-style: none; /* IE and Edge */
    scrollbar-width: none; /* Firefox */
}

body {
    font-family: var(--font-primary);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-background);
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* サイト全体の右端に縦線を表示 */
body::after {
    content: '';
    position: fixed;
    top: 0;
    right: 0;
    width: 2px;
    height: 100vh;
    background: var(--color-primary);
    z-index: 1000;
    pointer-events: none;
}

/* Hide scrollbars for WebKit browsers */
html::-webkit-scrollbar,
body::-webkit-scrollbar {
    width: 0;
    height: 0;
}

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

ul {
    list-style: none;
}

/* ===========================
   TYPOGRAPHY
   =========================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

h1 { font-size: var(--font-size-h1); }
h2 { font-size: var(--font-size-h2); }
h3 { font-size: var(--font-size-h3); }
h4 { font-size: var(--font-size-h4); }
h5 { font-size: var(--font-size-h5); }
h6 { font-size: var(--font-size-h6); }

p {
    margin-bottom: var(--spacing-sm);
}

/* ===========================
   LAYOUT
   =========================== */

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Narrower reading width for text-heavy sections */
.about .container,
.achievements-section .container,
.contact-section .container {
    max-width: 800px;
}

/* Main content area */
main {
    flex: 1;
}

/* ===========================
   LANGUAGE TOGGLE
   =========================== */

.lang-toggle {
    /* JP only for now */
    display: none !important;
}

.lang-btn {
    background: transparent;
    border: 1px solid var(--color-gray);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-small);
    cursor: pointer;
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
}

.lang-btn:hover {
    background: var(--color-gray-light);
}

.lang-btn.active {
    background: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}

/* ===========================
   CUSTOM SCROLLBARS
   =========================== */

/* カスタムスクロールバーはモーダル内でのみ使用 */
.modal-body.custom-scrollbar {
    /* Firefox用のスクロールバー */
    scrollbar-width: thin;
    scrollbar-color: var(--color-primary) transparent;
    /* モバイルでのスムーズスクロール */
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
}

/* WebKit用のカスタムスクロールバー（モーダル内のみ） */
.modal-body.custom-scrollbar::-webkit-scrollbar {
    width: 3px;
}

.modal-body.custom-scrollbar::-webkit-scrollbar-track {
    background: transparent;
}

.modal-body.custom-scrollbar::-webkit-scrollbar-thumb {
    background-color: var(--color-primary);
    border-radius: 2px;
}

.modal-body.custom-scrollbar::-webkit-scrollbar-thumb:hover {
    background-color: var(--color-primary);
    opacity: 0.8;
}

/* 矢印ボタン（三角）を非表示 */
.modal-body.custom-scrollbar::-webkit-scrollbar-button {
    display: none;
}

/* モバイル用スクロールバー調整 */
@media (max-width: 768px) {
    .modal-body.custom-scrollbar::-webkit-scrollbar {
        width: 2px;
    }
}

@media (max-width: 480px) {
    .modal-body.custom-scrollbar::-webkit-scrollbar {
        width: 2px;
    }
}

/* ===========================
   NAVIGATION
   =========================== */

.main-nav {
    background: var(--color-white);
    box-shadow: var(--shadow-small);
    position: sticky;
    top: 0;
    z-index: var(--z-nav);
    height: var(--nav-height);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 1.2rem;
    height: var(--nav-height);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.2rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
}

/* Prevent logo from pushing the hamburger on small screens */
.logo {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 80%;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-menu a {
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
    position: relative;
    padding: 0.5rem 0;
}

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

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
    text-decoration: none !important;
}

/* ロゴやナビゲーションの各リンクのホバー時もアンダーラインを消す */
.main-nav a:hover,
.nav-menu a:hover {
    text-decoration: none !important;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 0.25rem;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--color-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* Improved hamburger sizing and alignment for small screens */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
        width: 40px;
        height: 32px;
        padding: 6px;
        box-sizing: border-box;
        align-items: center;
        justify-content: center;
    }

    .hamburger span {
        width: 100%;
        height: 3px;
        border-radius: 3px;
        background: var(--color-primary);
    }

    /* Slightly increase hit area on very small screens */
    @media (max-width: 480px) {
        .hamburger { width: 44px; height: 36px; padding: 8px; }
    }
}

/* ===========================
   HERO SECTION
   =========================== */

.hero {
    /* Simplified hero for JP site */
    min-height: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) var(--container-padding);
    width: 100%;
    gap: 2rem;
    position: relative;
    overflow: hidden;
    background: url('../assets/images/background.png') center/cover no-repeat;
    will-change: background-position;
}

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

.hero-title {
    font-size: clamp(2rem, 5vw, 4rem);
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.hero-subtitle {
    font-size: var(--font-size-large);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-lg);
}

.cta-button {
    display: inline-block;
    background: var(--color-accent);
    color: var(--color-white);
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-medium);
    box-shadow: var(--shadow-medium);
}

.cta-button:hover {
    filter: brightness(0.9);
    box-shadow: var(--shadow-large);
    transform: translateY(-2px);
}

/* Decorative hero visuals removed */

/* ===========================
   SECTIONS
   =========================== */

.about,
.featured,
.page-header,
.achievements-section,
.works-section,
.news-section,
.contact-section,
.detail-section {
    padding: var(--spacing-xxl) 0;
}

/* Make works section wider to allow ~4 tiles by default on large screens */
.works-section .container {
    max-width: 1440px;
}

.section-title,
.page-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--color-primary);
}

/* Parallax-enabled page header */
.page-header {
    background-image: url('../assets/images/background.png');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center center;
    will-change: background-position;
    color: var(--color-white);
    text-align: center;
    /* Unify header height across pages */
    display: flex;
    align-items: center;
    justify-content: center;
    height: 320px; /* fixed height for consistency */
    padding: 0; /* avoid padding affecting total height */
}

.page-header .page-title {
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.page-subtitle {
    font-size: var(--font-size-large);
    color: rgba(255, 255, 255, 0.9);
}

/* ===========================
   ABOUT SECTION
   =========================== */

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

/* Grid layout for profile section */
.about-grid {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 2rem;
    align-items: start;
}

.profile-container {
    justify-self: center;
}

.about-text p {
    font-size: var(--font-size-large);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

/* Profile photo for a researcher-style About page (square with slight rounding) */
.about .profile-photo {
    width: 220px;
    height: 220px;
    border-radius: 8px; /* subtle rounding */
    overflow: hidden;
    box-shadow: var(--shadow-medium);
    background: #ddd;
    margin: 0;
}

.about .profile-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Responsive: stack on small screens */
@media (max-width: 768px) {
    .about-grid {
        grid-template-columns: 1fr; /* stack columns */
        gap: 1.5rem;
        text-align: center;
    }
    
    .profile-container {
        justify-self: center;
    }
    
    .about .profile-photo {
        width: 200px;
        height: 200px;
        margin: 0 auto;
    }
    
    .profile-text {
        text-align: left; /* テキストは左揃え */
    }
}

/* ===========================
   FEATURED/WORKS GRID
   =========================== */

.featured-grid,
.works-grid {
    display: grid;
    /* Fixed card width: 250px columns that wrap and are centered. */
    grid-template-columns: repeat(auto-fit, 200px);
    justify-content: center; /* center the grid when there's extra space */
    gap: var(--spacing-lg);
}

.featured-card,
.work-card {
    background: var(--color-white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-medium);
    border: 1px solid #eaeaea; /* subtle frame */
    transition: all var(--transition-medium);
    /* ensure anchor-wrapped cards look like blocks and inherit text styles */
    display: block;
    color: inherit;
    text-decoration: none !important;
    cursor: pointer;
}

.featured-card:hover,
.work-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.card-image {
    aspect-ratio: 1 / 1; /* square */
    overflow: hidden;
    position: relative;
    background: #f5f5f5;
}

/* Blurred background layer */
.card-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: var(--bg-image);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    filter: blur(20px);
    transform: scale(1.1); /* prevent blur edge artifacts */
    z-index: 1;
}

.card-image img {
    position: relative;
        z-index: 10;
    width: 100%;
    height: 100%;
    object-fit: contain; /* fit entire image within square */
    display: block;
}

.placeholder-image {
    width: 100%;
    height: 100%;
    background: #e0e0e0; /* neutral gray */
    color: #7a7a7a;
    position: relative;
    display: block;
}

.placeholder-image::after {
    content: 'no image';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.95rem;
    letter-spacing: 0.06em;
    text-transform: lowercase;
    color: #7a7a7a;
}



.card-content {
    padding: 0.8rem;
    margin-bottom: auto;
}

.card-content h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
    /* Slightly smaller heading for card titles */
    font-size: var(--font-size-h4);
}

.card-content p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.card-link {
    color: var(--color-accent);
    font-weight: var(--font-weight-medium);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.card-link:hover { text-decoration: underline; }

/* Tags shown on cards */
.card-meta {
    margin-top: 0.75rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    align-items: center;
}

.card-date {
    color: var(--color-text-light);
    font-size: 0.9rem;
    font-weight: var(--font-weight-medium);
}

.card-tags {
    margin-top: 0.5rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tag-badge {
    background: var(--color-gray-light);
    color: var(--color-text);
    padding: 0.1rem 0.5rem;
    border-radius: 999px;
    font-size: 0.8rem;
}

/* Actions row under tags (e.g., Link button) */
.card-actions {
    margin-top: 0.5rem;
}

.card-actions .pub-link {
    margin-left: 0; /* align to left under tags */
}

/* Filter bar sits above works grid */
.works-filter-bar {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

/* ===========================
   FILTER BAR
   =========================== */

.filter-bar {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.filter-btn {
    background: var(--color-white);
    border: 2px solid var(--color-gray-light);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
}

.filter-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.filter-btn.active {
    background: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}

/* ===========================
   achievementS
   =========================== */

.achievements-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.achievement-item {
    background: transparent;
    padding: 0;
    border-radius: 0;
    box-shadow: none;
    transition: none;
    border-left: none;
    display: flex;
    align-items: baseline;
    gap: 0.1rem;
    line-height: 1.7;
}

.achievement-content {
    flex: 1
}

.achievement-links {
    display: flex;
    gap: 0.3rem;
    flex-wrap: wrap;
    justify-content: flex-start;
    align-items: baseline;
    text-align: left;
    min-width: 5rem; /* タグ3つ分程度の最小幅 */
}

.achievement-item:hover {
    box-shadow: none;
    transform: none;
}

.achievement-item h3 { margin: 0; }

.achievement-meta { display: none; }

.achievement-tag {
    background: var(--color-gray-light);
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius-small);
    font-size: var(--font-size-small);
}

/* Make content sections have white background */
.about,
.featured,
.achievements-section,
.works-section,
.news-section,
.contact-section,
.detail-section {
    background: var(--color-white);
}

/* Bibliography style */
.refs-list {
    list-style-type: disc;
    padding-left: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.achievement-item {
    line-height: 1.7;
    display: list-item;
    list-style-type: disc;
    margin-bottom: 0.75rem;
}

.achievement-item-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
}

.achievement-content {
    flex: 1;
}

.achievement-links {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    flex-shrink: 0;
    text-align: left;
    width: 60px;
    margin-top: 0.4rem;
    padding-left: 0.5rem;
}

.pub-link {
    display: block;
    text-align: center;
    padding: 0.1rem 0.4rem;
    font-size: 0.65rem;
    border-radius: 999px;
    cursor: pointer;
    transition: all 0.6s ease-out; /* フェードアウトはゆっくり */
    text-decoration: none;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    border: 1px solid var(--color-primary);
    white-space: nowrap;
    width: 100%; /* 固定幅 */
    box-sizing: border-box;
}

.pub-link:hover {
    background-color: var(--color-white);
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    transition: all 0.05s ease-in; /* ホバー開始は爆速 */
}

/* 各ボタンタイプ別のホバー効果 */
.pub-link-paper:hover {
    background-color: var(--color-white);
    color: var(--color-button-paper);
    border: 1px solid var(--color-button-paper);
    transition: all 0.05s ease-in; /* ホバー開始は爆速 */
}

.pub-link-poster:hover {
    background-color: var(--color-white);
    color: var(--color-button-poster);
    border: 1px solid var(--color-button-poster);
    transition: all 0.05s ease-in; /* ホバー開始は爆速 */
}

.pub-link-slide:hover,
.pub-link-slides:hover {
    background-color: var(--color-white);
    color: var(--color-button-slide);
    border: 1px solid var(--color-button-slide);
    transition: all 0.05s ease-in; /* ホバー開始は爆速 */
}

.pub-link-github:hover {
    background-color: var(--color-white);
    color: var(--color-button-github);
    border: 1px solid var(--color-button-github);
    transition: all 0.05s ease-in; /* ホバー開始は爆速 */
}

.pub-link-code:hover {
    background-color: var(--color-white);
    color: var(--color-button-code);
    border: 1px solid var(--color-button-code);
    transition: all 0.05s ease-in; /* ホバー開始は爆速 */
}

/* 複数のリンクタイプ用のスタイル - 個別テキスト色対応 */
.pub-link-paper {
    background-color: var(--color-button-paper);
    color: var(--color-button-paper-text);
    border: 1px solid var(--color-button-paper);
}

.pub-link-poster {
    background-color: var(--color-button-poster);
    color: var(--color-button-poster-text);
    border: 1px solid var(--color-button-poster);
}

.pub-link-slide {
    background-color: var(--color-button-slide);
    color: var(--color-button-slide-text);
    border: 1px solid var(--color-button-slide);
}

.pub-link-slides {
    background-color: var(--color-button-slide);
    color: var(--color-button-slide-text);
    border: 1px solid var(--color-button-slide);
}

.pub-link-github {
    background-color: var(--color-button-github);
    color: var(--color-button-github-text);
    border: 1px solid var(--color-button-github);
}

.pub-link-code {
    background-color: var(--color-button-code);
    color: var(--color-button-code-text);
    border: 1px solid var(--color-button-code);
}

.pub-link-demo {
    background-color: var(--color-button-demo);
    color: var(--color-button-demo-text);
    border: 1px solid var(--color-button-demo);
}

.pub-link-demo {
    background-color: var(--color-button-demo);
    color: var(--color-button-demo-text);
    border: none;
}

.pub-link-demo:hover {
    background-color: var(--color-white);
    color: var(--color-button-demo);
    border: 1px solid var(--color-button-demo);
    transition: all 0.05s ease-in; /* ホバー開始は爆速 */
}

.ref-title { font-weight: var(--font-weight-medium); }
.ref-venue { color: var(--color-text-light); }

.ref-links {
    margin-top: 0.25rem;
    padding-left: 1.5em; /* align with hanging indent */
}

.ref-links a {
    color: var(--color-accent);
    margin-right: 1rem;
}

/* ===========================
   WORKS
   =========================== */

.works-list {
    list-style-type: disc;
    padding-left: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.work-item {
    line-height: 1.7;
}

.work-title {
    font-weight: var(--font-weight-medium);
}

.work-description {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.work-link {
    display: inline-block;
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
    padding: 0rem 0.5rem;
    margin-left: 0.5rem;
    font-size: 0.85rem;
    border-radius: 3px;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.work-link:hover {
    background-color: var(--color-accent);
    color: white;
}

.category-section {
    margin-bottom: var(--spacing-xl);
}

.category-title {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-h3);
}

/* ===========================
   NEWS
   =========================== */

.news-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    max-width: 800px;
    margin: 0 auto;
}

.news-item {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
    transition: all var(--transition-medium);
}

.news-item:hover {
    box-shadow: var(--shadow-large);
}

.news-date {
    color: var(--color-text-light);
    font-size: var(--font-size-small);
    margin-bottom: var(--spacing-sm);
}

.news-item h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

/* ===========================
   CONTACT
   =========================== */

.contact-grid {
    /* Default: two-column contact grid with wider cards for readability */
    display: grid;
    grid-template-columns: repeat(2, minmax(320px, 1fr));
    gap: 1rem;
    align-items: start;
    max-width: 960px;
    margin: 0 auto;
}

@media (max-width: 900px) {
    /* fall back to single-column on narrower screens */
    .contact-grid { grid-template-columns: 1fr; max-width: 640px; }
}

/* Contact card styles (used on /contact) */
.contact-card {
    background: var(--color-white);
    padding: 1rem;
    border-radius: 8px;
    box-shadow: var(--shadow-medium);
}

.contact-link {
    display: block;
    color: inherit;
    text-decoration: none;
    transition: all 0.3s ease;
}

.contact-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-large, 0 8px 25px rgba(0, 0, 0, 0.15));
    color: inherit;
    text-decoration: none;
}

.contact-item {
    display: block;
    color: inherit;
    text-decoration: none;
    font-weight: normal;
}

.contact-meta {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.contact-meta svg {
    width: 36px;
    height: 36px;
    flex: 0 0 36px;
    color: var(--color-primary);
}

.contact-title { font-weight: 700; color: var(--color-primary); }
.contact-handle { color: var(--color-text); }
.contact-url { color: var(--color-text-light); font-size: 0.9rem; }

.contact-intro { margin-bottom: 1rem; color: var(--color-text-light); }

.contact-copy-btn { cursor: pointer; }

.contact-info {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
}

.info-item {
    margin-bottom: var(--spacing-lg);
}

.info-item h3 {
    color: var(--color-primary);
    font-size: var(--font-size-h5);
    margin-bottom: var(--spacing-sm);
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.social-link {
    color: var(--color-accent);
    transition: color var(--transition-fast);
}

.social-link:hover { text-decoration: underline; }

.contact-form-container {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
}

.form-group input,
.form-group textarea {
    padding: 0.75rem;
    border: 2px solid var(--color-gray-light);
    border-radius: var(--border-radius-small);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

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

.submit-btn {
    background: var(--color-accent);
    color: var(--color-white);
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--border-radius);
    font-weight: var(--font-weight-medium);
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-medium);
}

.submit-btn:hover { filter: brightness(0.9); box-shadow: var(--shadow-large); }

.form-message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-small);
    display: none;
}

.form-message.success {
    display: block;
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.form-message.error {
    display: block;
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* ===========================
   DETAIL PAGES
   =========================== */

.back-link {
    display: inline-flex;
    align-items: center;
    color: var(--color-accent);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-lg);
    transition: color var(--transition-fast);
}

.back-link:hover { text-decoration: underline; }

.detail-content {
    background: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
    max-width: 900px;
    margin: 0 auto;
}

.detail-content h1 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.detail-content img {
    width: 100%;
    border-radius: var(--border-radius);
    margin: var(--spacing-lg) 0;
}

/* ===========================
   FOOTER
   =========================== */

.footer {
    background: var(--color-primary);
    color: var(--color-white);
    /* Reduced vertical padding to make footer more compact */
    padding: var(--spacing-md) 0;
    margin-top: auto; /* stick to bottom on tall screens */
}

/* Center footer text/content */
.footer .container {
    text-align: center;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    /* Use smaller gaps so footer is tighter */
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-section h3 {
    margin-bottom: var(--spacing-md);
}

.footer-section ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

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

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

/* ===========================
   RESPONSIVE
   =========================== */

@media (max-width: 768px) {
    .lang-toggle {
        top: 10px;
        right: 10px;
    }

    .hamburger {
        display: flex;
    }

    .nav-container {
        height: var(--nav-height-mobile, 56px);
    }

    .main-nav {
        height: var(--nav-height-mobile, 56px);
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        gap: 0;
        padding: 1rem 0;
        box-shadow: var(--shadow-large);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-medium);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-menu li {
    padding: 0.75rem var(--container-padding);
    list-style: none !important;
    }

    .hero {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-lg) var(--container-padding);
    }

    .hero-visual {
        height: 300px;
    }

    .visual-element:nth-child(1) {
        width: 200px;
        height: 200px;
    }

    .visual-element:nth-child(2) {
        width: 150px;
        height: 150px;
    }

    .visual-element:nth-child(3) {
        width: 100px;
        height: 100px;
    }

    .featured-grid,
    .works-grid {
        /* On small screens, force exactly 2 columns of the fixed 150px card width and center them */
        grid-template-columns: repeat(2, 150px);
        justify-content: center;
    }

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

    /* shorter header on smaller screens */
    .page-header { height: 240px; }
}

@media (max-width: 480px) {
    :root {
        --font-size-h1: 2rem;
        --font-size-h2: 1.75rem;
        --font-size-h3: 1.5rem;
    }

    .container {
        padding: 0 1rem;
    }
}

/* ===========================
   UTILITIES
   =========================== */

.hidden {
    display: none !important;
}

.fade-in {
    animation: fadeIn var(--transition-slow);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===========================
   MODAL
   =========================== */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
}

.modal.active {
    display: block;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    max-width: 600px;
    max-height: 95vh;
    margin: 2.5vh auto;
    background: var(--color-white);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border, #e0e0e0);
    z-index: 10000;
    animation: modalSlideIn 0.3s ease-out;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.modal-content::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Opera */
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Modal header with title and close button - 固定ヘッダー */
.modal-header {
    position: sticky;
    top: 0;
    z-index: 10001;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--color-primary);
    flex-shrink: 0;
    background: var(--color-white);
    border-radius: 0;
}

.modal-header h2 {
    margin: 0;
    color: var(--color-primary);
    flex: 1;
    line-height: 1.3;
}

.modal-close {
    background: transparent;
    border: none;
    width: 24px;
    height: 24px;
    color: var(--color-text-light);
    cursor: pointer;
    padding: 0;
    margin: 0;
    flex-shrink: 0;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close::before,
.modal-close::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 2px;
    background-color: var(--color-text-light);
    border-radius: 1px;
}

.modal-close::before {
    transform: rotate(45deg);
}

.modal-close::after {
    transform: rotate(-45deg);
}

.modal-body {
    padding: 0 2rem 2rem 2rem;
    overflow-y: auto;
    flex: 1;
}

/* Remove old h2 first-child styling since header is now separate */
.modal-body h2 {
    margin-top: 0;
    margin-bottom: 0;
}

/* Modal meta row (date + tags, matching card style) - ヘッダー直下に配置 */
.modal-meta {
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    align-items: center;
    background: var(--color-white);
}

/* Modal actions (Link button) */
.modal-actions {
    margin-bottom: var(--spacing-md);
}

/* Modal image */
.modal-image {
    margin-bottom: 1rem;
    border-radius: var(--border-radius);
    overflow: hidden;
    width: 100%;
}

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

/* Clickable modal image */
.modal-image.clickable-image {
    cursor: pointer;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.modal-image.clickable-image:hover {
    /* ホバー時の拡大・透過を無効化 */
    transform: none;
    opacity: 1;
}

.modal-image.clickable-image a {
    display: block;
    text-decoration: none;
}

/* YouTube embed container */
.youtube-embed-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    margin-bottom: 0;
    border-radius: var(--border-radius);
    overflow: hidden;
    background: #000;
}

.youtube-embed-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* Modal external URL */
.modal-external-url {
    text-align: center;
    font-size: 0.95rem;
    color: var(--color-text-light);
    padding: var(--spacing-sm);
    background-color: var(--color-surface);
    border-radius: var(--border-radius);
}

.modal-external-url a:hover {
    text-decoration: underline;
}

/* Modal content text area */
.modal-content-text {
    line-height: 1.8;
}

.modal-body h2 {
    color: var(--color-primary);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.modal-body h3 {
    color: var(--color-text);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.modal-body p {
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.modal-body ul,
.modal-body ol {
    margin-bottom: var(--spacing-md);
    padding-left: 2rem;
}

.modal-body li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}


.modal-body .loading,
.modal-body .error {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-light);
}

.modal-body .error {
    color: #d32f2f;
}

@media (max-width: 768px) {
    .modal-content {
        max-width: 95%;
        margin: 1vh auto;
        max-height: 98vh;
        border-radius: var(--border-radius);
    }
    
    .modal-header {
        position: sticky;
        top: 0;
        z-index: 10001;
        padding: 1rem 0;
        background: var(--color-white);
        border-bottom: 1px solid var(--color-border, #e0e0e0);
        align-items: flex-start;
    }
    
    .modal-body {
        padding: 0 1.5rem 1.5rem 1.5rem;
    }
    
    .modal-meta {
        padding: 0.75rem 1.5rem 0 1.5rem;
    }
    
    .modal-header h2 {
        font-size: 1.2rem;
        line-height: 1.2;
    }
    
    .modal-close {
        font-size: 1.4rem;
        min-width: 32px;
        min-height: 32px;
    }
}

/* 非常に小さな画面用 */
@media (max-width: 480px) {
    .modal-content {
        max-width: 98%;
        margin: 0.5vh auto;
        max-height: 99vh;
        border-radius: 8px;
    }
    
    .modal-header {
        position: sticky;
        top: 0;
        z-index: 10001;
        padding: 1rem 0;
        background: var(--color-white);
        border-bottom: 1px solid var(--color-border, #e0e0e0);
        align-items: flex-start;
    }
    
    .modal-body {
        padding: 0 1rem 1rem 1rem;
    }
    
    .modal-meta {
        padding: 0.5rem 1rem 0 1rem;
    }
    
    .modal-header h2 {
        font-size: 1.1rem;
    }
    
    .modal-close {
        font-size: 1.3rem;
        min-width: 32px;
        min-height: 32px;
    }
}

/* ===========================
   INTERACTIVE BACKGROUND STYLES
   =========================== */

/* Prevent horizontal scrolling for interactive background */
body {
    overflow-x: hidden;
}

/* Full-screen canvas positioned behind all content */
#p5-canvas {
    position: fixed;
    top: 0;
    left: 0;
    z-index: -1;
    width: 100vw;
    height: 100vh;
}

/* Ensure content layers are above the interactive background */
.page-header,
main,
nav {
    position: relative;
    z-index: 1;
}

/* Make main content background transparent to show interactive background */
main {
    background: transparent;
}

/* Make all content sections transparent */
.about,
.featured,
.achievements-section,
.works-section,
.news-section,
.contact-section,
.detail-section {
    background: transparent !important;
}

/* Customize text selection colors */
::selection {
    background-color: var(--color-primary);
    color: var(--color-white);
}

::-moz-selection {
    background-color: var(--color-primary);
    color: var(--color-white);
}