/* AME LAB 雨宮研究室 — 共通スタイル（全ページ共通） */

:root {
    --bg-primary: #0a0d14;
    --bg-secondary: #121824;
    --bg-card: rgba(18, 24, 36, 0.75);
    --bg-glass: rgba(255, 255, 255, 0.03);
    --header-bg: rgba(10, 13, 20, 0.8);
    --text-primary: #f0f4f8;
    --text-secondary: #94a3b8;
    --text-muted: #7d8ba1;
    --accent-cyan: #00f2fe;
    --accent-blue: #4facfe;
    --accent-purple: #7f00ff;
    --accent-purple-text: #c084fc;
    --on-accent: #000;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(0, 242, 254, 0.25);
    --shadow-hover: 0 12px 30px rgba(0, 0, 0, 0.3);
    --particle-rgb: 0, 242, 254;
    --radius-md: 12px;
    --radius-lg: 20px;
    --gutter: 2rem;
    --header-h: 70px;
    --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    color-scheme: dark;
}

/* ライトテーマ：文字色・アクセント色は背景に対してWCAG AA（4.5:1）以上 */
[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-glass: rgba(0, 0, 0, 0.02);
    --header-bg: rgba(248, 250, 252, 0.85);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --accent-cyan: #0369a1;
    --accent-blue: #2563eb;
    --accent-purple: #7c3aed;
    --accent-purple-text: #6d28d9;
    --on-accent: #fff;
    --border-color: rgba(0, 0, 0, 0.08);
    --border-glow: rgba(3, 105, 161, 0.25);
    --shadow-hover: 0 12px 30px rgba(15, 23, 42, 0.08);
    --particle-rgb: 3, 105, 161;
    color-scheme: light;
}

/* 日英切替：.ja / .en を付けた要素は表示中の言語だけを出す */
html[lang="ja"] .en,
html[lang="en"] .ja {
    display: none !important;
}

[hidden] {
    display: none !important;
}

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

html {
    scroll-padding-top: calc(var(--header-h) + 0.5rem);
}

@media (prefers-reduced-motion: no-preference) {
    html {
        scroll-behavior: smooth;
    }
}

body {
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.4s ease, color 0.4s ease;
}

a {
    color: inherit;
    text-decoration: none;
}

:focus-visible {
    outline: 2px solid var(--accent-cyan);
    outline-offset: 3px;
    border-radius: 4px;
}

.skip-link {
    position: absolute;
    left: 1rem;
    top: -100px;
    z-index: 2000;
    padding: 0.6rem 1rem;
    background: var(--accent-cyan);
    color: var(--on-accent);
    border-radius: 8px;
    font-weight: 700;
}

.skip-link:focus {
    top: 1rem;
}

/* Header Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem var(--gutter);
    background: var(--header-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.15rem;
    letter-spacing: -0.02em;
    flex-shrink: 0;
    white-space: nowrap;
}

.brand-logo img {
    height: 38px;
    width: auto;
    max-width: min(40vw, 200px);
    object-fit: contain;
}

.no-logo img[data-logo] {
    display: none;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    position: relative;
    padding: 0.25rem 0;
    white-space: nowrap;
}

.nav-link:hover, .nav-link.active {
    color: var(--accent-cyan);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
    transition: var(--transition);
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.theme-toggle, .lang-toggle {
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 0.8rem;
    border-radius: 8px;
    cursor: pointer;
    font: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-width: 2.6rem;
    transition: var(--transition);
}

.theme-toggle:hover, .lang-toggle:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

/* Hero Section（全幅） */
.hero {
    position: relative;
    max-width: none;
    margin: 0;
    min-height: 92vh;
    min-height: 92svh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8rem var(--gutter) 4rem;
    overflow: hidden;
}

#hero-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    opacity: 0.6;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 0.4rem 1rem;
    background: rgba(0, 242, 254, 0.1);
    border: 1px solid var(--border-glow);
    border-radius: 30px;
    font-size: 0.85rem;
    color: var(--accent-cyan);
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.hero-title {
    margin-bottom: 1.5rem;
    line-height: 1;
}

/* ロゴ画像が読み込めないときの文字ロゴ */
.logo-wordmark {
    display: none;
    font-weight: 800;
    letter-spacing: -0.04em;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.no-logo .logo-wordmark {
    display: inline-block;
}

.hero-wordmark {
    display: inline-block;
    font-size: clamp(3rem, 12vw, 5.5rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    padding: 0.1em 0;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    font-weight: 400;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 1.25rem;
    flex-wrap: wrap;
}

.btn {
    padding: 0.8rem 2rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    color: var(--on-accent);
    border: none;
    box-shadow: 0 4px 20px rgba(0, 242, 254, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 242, 254, 0.5);
}

.btn-secondary {
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateY(-2px);
}

/* Section Layout */
section {
    padding: 6rem var(--gutter);
    max-width: 1280px;
    margin: 0 auto;
}

.section-panel {
    width: calc(100% - 2 * var(--gutter));
    background: var(--bg-glass);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.section-header {
    margin-bottom: 3.5rem;
    text-align: center;
}

.section-tag {
    color: var(--accent-cyan);
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
    display: block;
}

.section-title {
    font-size: clamp(1.75rem, 5vw, 2.25rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.section-description {
    color: var(--text-secondary);
    max-width: 680px;
    margin: 0 auto;
    font-size: 1rem;
}

.keyword-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    list-style: none;
    margin-top: 1.5rem;
}

.keyword-list li {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 0.3rem 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 30px;
    background: var(--bg-glass);
}

/* Cards Grid（狭い画面でもはみ出さないよう min() で列幅を制限） */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr));
    gap: 2rem;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: var(--transition);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: relative;
    overflow: hidden;
}

.card:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.card h3 {
    font-size: 1.15rem;
    line-height: 1.4;
}

.card-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
    display: block;
}

.icon-cyan { color: var(--accent-cyan); }
.icon-blue { color: var(--accent-blue); }
.icon-purple { color: var(--accent-purple-text); }

.card-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.card-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.card-link {
    color: var(--accent-cyan);
    font-weight: 700;
    word-break: break-all;
}

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

/* Campus / Prospective Guide Section */
.campus-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.campus-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    position: relative;
}

.campus-card.main-lab {
    border-color: var(--accent-cyan);
    background: linear-gradient(135deg, rgba(0, 242, 254, 0.05) 0%, var(--bg-card) 100%);
}

.campus-badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.badge-cyan { background: rgba(0, 242, 254, 0.15); color: var(--accent-cyan); }
.badge-purple { background: rgba(127, 0, 255, 0.15); color: var(--accent-purple-text); }
.badge-blue { background: rgba(79, 172, 254, 0.15); color: var(--accent-blue); }

.campus-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.campus-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Members Hierarchy */
.member-category {
    margin-bottom: 3rem;
}

.member-category-title {
    font-size: 1.3rem;
    font-weight: 700;
    border-left: 4px solid var(--accent-cyan);
    padding-left: 0.75rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.member-subtitle {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-secondary);
    margin: 1.5rem 0 0.75rem;
}

.member-card {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
}

/* 顔写真（読み込めない場合は頭文字・アイコンを表示） */
.avatar {
    position: relative;
    width: 72px;
    height: 72px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-glass);
    border: 2px solid var(--border-glow);
}

.avatar img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 25%;
}

.avatar.no-photo img {
    display: none;
}

.avatar-fallback {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-cyan);
}

.person-chip .avatar {
    margin-bottom: 0.6rem;
}

.member-avatar {
    width: 104px;
    height: 104px;
}

.member-avatar .avatar-fallback {
    font-size: 2.25rem;
}

.member-info h4 {
    font-size: 1.1rem;
    font-weight: 700;
}

.member-info h4 small {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-left: 0.4rem;
}

.member-role {
    font-size: 0.85rem;
    color: var(--accent-cyan);
    font-weight: 600;
    margin-bottom: 0.4rem;
}

.member-bio {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.4rem;
}

.person-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(180px, 100%), 1fr));
    gap: 1rem;
    list-style: none;
}

.person-chip {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.15rem;
}

.person-role {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--accent-cyan);
}

.person-name {
    font-size: 1rem;
    font-weight: 700;
}

.person-roman {
    font-size: 0.78rem;
    color: var(--text-muted);
    letter-spacing: 0.02em;
}

/* 個人サイトへのリンク（メンバーのカード） */
.person-link {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    margin-top: 0.45rem;
    padding: 0.2rem 0.7rem;
    border: 1px solid var(--border-color);
    border-radius: 30px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-cyan);
    transition: var(--transition);
}

.person-link:hover {
    border-color: var(--accent-cyan);
}

.person-chip .campus-badge {
    margin: 0.4rem 0 0;
}

/* Publications Subcategories */
.pub-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.pub-tab {
    padding: 0.5rem 1.25rem;
    border-radius: 30px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.pub-tab:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.pub-tab.active {
    background: var(--accent-cyan);
    color: var(--on-accent);
    border-color: var(--accent-cyan);
}

.pub-list {
    list-style: none;
}

.pub-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    margin-bottom: 1rem;
    transition: var(--transition);
}

.pub-item:hover {
    border-color: var(--accent-cyan);
}

.pub-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 10px;
    align-items: center;
    font-size: 0.8rem;
    margin-bottom: 0.4rem;
}

.pub-type {
    font-weight: 700;
    color: var(--accent-cyan);
}

.pub-year {
    color: var(--text-muted);
}

.pub-award {
    color: var(--accent-purple-text);
    font-weight: 700;
}

.pub-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
    line-height: 1.5;
}

.pub-authors {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.pub-venue {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* 論文の DOI リンク */
.pub-links {
    margin-top: 0.45rem;
}

.pub-doi {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    max-width: 100%;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-cyan);
    overflow-wrap: anywhere;
}

.pub-doi i {
    font-size: 0.7rem;
}

.pub-doi:hover {
    text-decoration: underline;
}

.pub-note {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: right;
}

.more-btn-container {
    text-align: center;
    margin-top: 2rem;
}

/* News Section */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    list-style: none;
}

.news-card {
    display: flex;
    gap: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
    align-items: center;
    transition: var(--transition);
}

.news-card:hover {
    border-color: var(--accent-cyan);
}

.news-date {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 600;
    min-width: 100px;
}

.news-badge {
    font-size: 0.75rem;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-weight: 700;
    min-width: 90px;
    text-align: center;
}

.news-content {
    font-size: 0.95rem;
    color: var(--text-primary);
    flex-grow: 1;
}

/* Map */
.map-card {
    margin-top: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.map-frame {
    display: block;
    width: 100%;
    height: 420px;
    border: 0;
    background: var(--bg-glass);
}

.map-footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem 1rem;
    padding: 1rem 1.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.btn-sm {
    padding: 0.55rem 1.1rem;
    font-size: 0.85rem;
}

/* Footer */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 4rem var(--gutter) 2rem;
    margin-top: 4rem;
}

.footer-container {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(250px, 100%), 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand img {
    display: block;
    height: 120px;
    width: auto;
    max-width: 100%;
    margin-bottom: 1rem;
}

.footer-brand .logo-wordmark {
    font-size: 1.75rem;
    margin-bottom: 0.75rem;
}

.footer-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.footer-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

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

.footer-bottom {
    max-width: 1280px;
    margin: 0 auto;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Responsive Mobile Drawer */
.mobile-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.4rem;
    cursor: pointer;
    border-radius: 8px;
}

/* 中間幅ではナビの間隔を詰める */
@media (max-width: 1280px) {
    .nav-links {
        gap: 1rem;
    }

    .nav-link {
        font-size: 0.85rem;
    }
}

/* 1100px以下はハンバーガーメニュー（7項目が1行に収まらないため） */
@media (max-width: 1100px) {
    .nav-container {
        gap: 0.5rem;
    }

    .nav-links {
        position: fixed;
        top: var(--header-h);
        right: 0;
        width: min(280px, 100vw);
        height: calc(100vh - var(--header-h));
        height: calc(100dvh - var(--header-h));
        overflow-y: auto;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        align-items: flex-start;
        border-left: 1px solid var(--border-color);
        transform: translateX(100%);
        visibility: hidden;
        transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), visibility 0s linear 0.3s;
    }

    .nav-links.open {
        transform: none;
        visibility: visible;
        transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .nav-link {
        font-size: 1rem;
    }

    .mobile-toggle {
        display: inline-flex;
    }
}

@media (max-width: 900px) {
    .news-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}

@media (max-width: 600px) {
    :root {
        --gutter: 1rem;
    }

    header {
        padding-top: 0.75rem;
        padding-bottom: 0.75rem;
    }

    .brand-logo {
        font-size: 1rem;
        gap: 8px;
    }

    .brand-logo img {
        height: 32px;
    }

    .nav-actions {
        gap: 0.4rem;
    }

    .theme-toggle, .lang-toggle {
        padding: 0.45rem 0.6rem;
    }

    section {
        padding-top: 4rem;
        padding-bottom: 4rem;
    }

    .section-panel {
        padding-left: 1.25rem;
        padding-right: 1.25rem;
    }

    .section-header {
        margin-bottom: 2.5rem;
    }

    .hero {
        padding-top: 7rem;
    }

    .hero-subtitle {
        font-size: 1.05rem;
    }

    .br-wide {
        display: none;
    }

    .card {
        padding: 1.5rem;
    }

    .member-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .map-frame {
        height: 320px;
    }

    .map-footer {
        padding: 1rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }
}

/* =====================================================================
   サブページ（研究紹介・メンバー・論文・ニュース）
   ===================================================================== */

/* ページ見出し（小さめのヒーロー） */
.page-hero {
    min-height: 0;
    padding: calc(var(--header-h) + 3.5rem) var(--gutter) 3.5rem;
}

.page-hero .hero-content {
    max-width: 820px;
}

.breadcrumb {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.breadcrumb a {
    color: var(--text-secondary);
}

.breadcrumb a:hover {
    color: var(--accent-cyan);
}

.page-title {
    margin: 0.35rem 0 1rem;
    font-size: clamp(2.1rem, 6vw, 3.2rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.25;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.page-hero .hero-subtitle {
    font-size: 1.05rem;
    margin-bottom: 0;
}

.page-hero + section {
    padding-top: 3rem;
}

/* 一覧の操作バー（絞り込み・検索） */
.list-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.filter-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.filter-tab {
    padding: 0.5rem 1.1rem;
    border-radius: 30px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

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

.filter-tab.active {
    background: var(--accent-cyan);
    color: var(--on-accent);
    border-color: var(--accent-cyan);
}

.filter-tab .count {
    margin-left: 0.3rem;
    font-weight: 500;
    opacity: 0.75;
}

.search-box {
    position: relative;
    flex: 0 1 300px;
}

.search-box input {
    width: 100%;
    padding: 0.6rem 1rem 0.6rem 2.4rem;
    border-radius: 30px;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-primary);
    font: inherit;
    font-size: 0.9rem;
}

.search-box input:focus {
    outline: none;
    border-color: var(--accent-cyan);
}

.search-box i {
    position: absolute;
    left: 0.95rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.85rem;
    pointer-events: none;
}

.result-count {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1.75rem;
}

.lang-note {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

/* 年ごとのまとまり */
.year-group {
    margin-bottom: 2.5rem;
}

.year-heading {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

.year-heading::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

.empty-state {
    text-align: center;
    color: var(--text-muted);
    padding: 3rem 1rem;
}

.pub-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.05rem 0.4rem;
}

.badge-gray {
    background: var(--bg-glass);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.page-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-top: 2.5rem;
}

/* メンバー：教授のプロフィール */
.pi-profile {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 2rem;
    align-items: start;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
}

.pi-profile .avatar {
    width: 220px;
    height: 220px;
}

.pi-profile .avatar-fallback {
    font-size: 3rem;
}

.pi-profile h3 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 0.25rem;
}

.pi-profile h3 small {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-left: 0.5rem;
}

.pi-affil {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

.sub-heading {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent-cyan);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin: 1.25rem 0 0.6rem;
}

.timeline {
    list-style: none;
    border-left: 2px solid var(--border-glow);
    padding-left: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}

.timeline li {
    position: relative;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.timeline li::before {
    content: '';
    position: absolute;
    left: calc(-1.25rem - 6px);
    top: 0.55em;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent-cyan);
}

.timeline time {
    display: inline-block;
    min-width: 6.5em;
    font-weight: 700;
    color: var(--text-primary);
}

.profile-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.member-info .profile-links {
    margin-top: 0.9rem;
}

/* 表（OB・OG） */
.table-wrap {
    overflow-x: auto;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.data-table th,
.data-table td {
    text-align: left;
    padding: 0.85rem 1.1rem;
    border-bottom: 1px solid var(--border-color);
    vertical-align: top;
}

.data-table tr:last-child td {
    border-bottom: 0;
}

.data-table th {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-muted);
    white-space: nowrap;
}

.data-table td small {
    display: block;
    color: var(--text-muted);
}

/* 研究紹介 */
.theme-group {
    margin-bottom: 4rem;
}

.theme-group:last-child {
    margin-bottom: 0;
}

.theme-group-head {
    margin-bottom: 1.75rem;
}

.theme-group-head p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    max-width: 760px;
}

.theme-card .card-text + .card-text {
    margin-top: 0.6rem;
}

.theme-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1.1rem;
}

.chip-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.3rem 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 30px;
    color: var(--accent-cyan);
}

.chip-link:hover {
    border-color: var(--accent-cyan);
}

@media (max-width: 600px) {
    .page-hero {
        padding-top: calc(var(--header-h) + 2.5rem);
        padding-bottom: 2.5rem;
    }

    .search-box {
        flex-basis: 100%;
    }

    .pi-profile {
        grid-template-columns: 1fr;
        padding: 1.5rem;
        gap: 1.25rem;
    }

    .pi-profile .avatar {
        width: 168px;
        height: 168px;
    }

    .timeline time {
        display: block;
        min-width: 0;
    }
}

/* =====================================================================
   トップページ：ニュースの横にショート動画（縦長 9:16）
   ===================================================================== */
.news-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 2rem;
    align-items: start;
}

.short-video {
    margin: 0;
}

.short-frame {
    position: relative;
    aspect-ratio: 9 / 16;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: #000;
    border: 1px solid var(--border-color);
}

.short-frame iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.short-video figcaption {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 0.25rem 0.75rem;
    margin-top: 0.75rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.short-video figcaption .fa-youtube {
    color: #ff3d3d;
}

.short-video figcaption a {
    color: var(--accent-cyan);
    font-weight: 600;
}

.short-video figcaption a:hover {
    text-decoration: underline;
}

/* 幅900px以下は、ニュースの下に中央寄せで表示 */
@media (max-width: 900px) {
    .news-layout {
        grid-template-columns: 1fr;
    }

    .news-shorts {
        width: 100%;
        max-width: 320px;
        margin: 0 auto;
    }
}

/* =====================================================================
   配属・連携案内のタブ
   ===================================================================== */
.tab-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.4rem;
    width: fit-content;
    max-width: 100%;
    margin: -1.5rem auto 2.25rem;
    padding: 0.35rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 14px;
}

.tab-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.7rem 1.4rem;
    border: 0;
    border-radius: 10px;
    background: transparent;
    color: var(--text-secondary);
    font: inherit;
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    color: var(--accent-cyan);
}

.tab-btn[aria-selected="true"] {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    color: var(--on-accent);
}

.tab-btn:focus-visible {
    outline: 2px solid var(--accent-cyan);
    outline-offset: 2px;
}

.tab-panel[hidden] {
    display: none;
}

.tab-lead {
    max-width: 780px;
    margin: 0 auto;
    text-align: center;
    color: var(--text-secondary);
}

/* 企業連携 */
.collab-cards {
    grid-template-columns: repeat(auto-fit, minmax(min(420px, 100%), 1fr));
}

.collab-card {
    display: block;
    color: inherit;
    transition: var(--transition);
}

.collab-card:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.collab-card .card-icon {
    font-size: 1.6rem;
    margin-bottom: 0.75rem;
}

.collab-partner {
    display: block;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--accent-cyan);
    margin-bottom: 0.35rem;
}

.partner-heading {
    margin: 2.5rem 0 1rem;
    font-size: 1.05rem;
    font-weight: 700;
    text-align: center;
}

.partner-chips {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
}

.partner-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 0.9rem;
    border: 1px solid var(--border-color);
    border-radius: 30px;
    background: var(--bg-glass);
    font-size: 0.85rem;
    color: var(--text-primary);
}

a.partner-chip {
    color: var(--accent-cyan);
    font-weight: 600;
    transition: var(--transition);
}

a.partner-chip:hover {
    border-color: var(--accent-cyan);
}

a.partner-chip i {
    font-size: 0.7rem;
}

.collab-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
}

/* 共同研究・産学連携ページ */
.collab-projects {
    display: grid;
    gap: 1.5rem;
}

.collab-project {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
}

.collab-project:target {
    border-color: var(--accent-cyan);
}

.collab-project-head {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
}

.collab-project-head .card-icon {
    margin: 0.15rem 0 0;
    font-size: 1.8rem;
}

.collab-project h3 {
    font-size: 1.2rem;
    line-height: 1.4;
}

.collab-project > .pub-links {
    margin-top: 0.6rem;
}

.collab-outputs {
    list-style: none;
    display: grid;
    gap: 0.75rem;
}

.collab-output {
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem 1.1rem;
}

.collab-kind {
    display: inline-block;
    margin-bottom: 0.3rem;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--accent-cyan);
}

.collab-output .pub-title {
    font-size: 0.95rem;
}

.collab-cta {
    margin-top: 3rem;
    text-align: center;
}

.collab-cta h2 {
    font-size: 1.35rem;
    margin-bottom: 0.5rem;
}

.collab-cta p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.collab-cta .hero-buttons {
    gap: 0.75rem;
}

@media (max-width: 600px) {
    .tab-list {
        width: 100%;
    }

    .tab-btn {
        flex: 1 1 auto;
        padding: 0.6rem 0.9rem;
        font-size: 0.85rem;
    }

    .collab-project {
        padding: 1.5rem;
    }
}

/* =====================================================================
   研究テーマのショート動画（クリックでポップアップ再生）
   ===================================================================== */
.has-short {
    cursor: pointer;
}

.play-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    margin-top: 1rem;
    padding: 0.45rem 0.95rem;
    border: 1px solid var(--border-glow);
    border-radius: 30px;
    background: var(--bg-glass);
    color: var(--accent-cyan);
    font: inherit;
    font-size: 0.8rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
}

.play-badge i {
    font-size: 1rem;
}

.has-short:hover .play-badge,
.play-badge:focus-visible {
    border-color: var(--accent-cyan);
    background: rgba(0, 242, 254, 0.08);
}

.play-badge:focus-visible {
    outline: 2px solid var(--accent-cyan);
    outline-offset: 2px;
}

.short-dialog {
    margin: auto;   /* 全体の margin: 0 を打ち消して画面中央に表示 */
    width: min(92vw, 380px);
    max-width: none;
    max-height: none;
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--text-primary);
    overflow: visible;
}

.short-dialog::backdrop {
    background: rgba(5, 8, 14, 0.82);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
}

.short-dialog-inner {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}

.short-dialog-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.short-dialog-title {
    font-size: 1rem;
    font-weight: 700;
    line-height: 1.4;
    padding-top: 0.3rem;
}

.short-dialog-close {
    flex: none;
    width: 2.25rem;
    height: 2.25rem;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    background: var(--bg-glass);
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.short-dialog-close:hover,
.short-dialog-close:focus-visible {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.short-dialog .short-frame {
    width: min(100%, calc((100vh - 9.5rem) * 9 / 16));
    width: min(100%, calc((100dvh - 9.5rem) * 9 / 16));
    margin: 0 auto;
}

/* 動画の題名（data-short-titles）と、複数の動画の切り替え */
.short-dialog-sub {
    margin: -0.25rem 0 0.75rem;
    font-size: 0.78rem;
    line-height: 1.5;
    color: var(--text-secondary);
}

.short-dialog.has-sub .short-frame {
    width: min(100%, calc((100vh - 13.5rem) * 9 / 16));
    width: min(100%, calc((100dvh - 13.5rem) * 9 / 16));
}

.short-dialog.is-multi .short-frame {
    width: min(100%, calc((100vh - 16.5rem) * 9 / 16));
    width: min(100%, calc((100dvh - 16.5rem) * 9 / 16));
}

.short-dialog-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 0.75rem;
}

.short-dialog-nav[hidden] {
    display: none;
}

.short-nav-btn {
    width: 2.25rem;
    height: 2.25rem;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    background: var(--bg-glass);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.short-nav-btn:hover,
.short-nav-btn:focus-visible {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.short-nav-count {
    min-width: 3.5em;
    text-align: center;
    font-size: 0.85rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: var(--text-secondary);
}

.short-dialog-foot {
    margin-top: 0.75rem;
    text-align: center;
    font-size: 0.85rem;
}

.short-dialog-foot a {
    color: var(--accent-cyan);
    font-weight: 600;
}

.short-dialog-foot .fa-youtube {
    color: #ff3d3d;
}

/* =====================================================================
   About：研究紹介動画（横長 16:9 / 縦長 9:16）
   ===================================================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.about-intro {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
    gap: 3rem;
    align-items: center;
    margin-bottom: 3.5rem;
}

.about-intro.is-portrait {
    grid-template-columns: minmax(0, 1fr) 320px;
}

.about-intro .section-header {
    margin-bottom: 0;
    text-align: left;
}

.about-intro .section-description {
    max-width: none;
    margin: 0;
}

.about-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.75rem;
}

/* 動画が無いときは、これまでどおり中央そろえの見出し */
.about-intro.no-video {
    display: block;
}

.about-intro.no-video .section-header {
    text-align: center;
}

.about-intro.no-video .section-description {
    max-width: 680px;
    margin: 0 auto;
}

.about-intro.no-video .about-actions {
    justify-content: center;
}

.about-video {
    margin: 0;
}

.video-frame {
    position: relative;
    aspect-ratio: 16 / 9;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: #000;
    border: 1px solid var(--border-color);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(0, 242, 254, 0.06);
}

.about-video.is-portrait .video-frame {
    aspect-ratio: 9 / 16;
}

.video-frame iframe,
.video-facade {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.video-facade {
    display: block;
    background: radial-gradient(circle at 30% 20%, rgba(0, 242, 254, 0.18), transparent 60%), #05080e;
    cursor: pointer;
}

.video-facade img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    opacity: 0.88;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s;
}

.video-facade:hover img {
    transform: scale(1.03);
    opacity: 1;
}

.video-play {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 4.5rem;
    height: 4.5rem;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    color: var(--on-accent);
    font-size: 1.4rem;
    box-shadow: 0 8px 30px rgba(0, 242, 254, 0.45);
    transform: translate(-50%, -50%);
    transition: transform 0.3s;
}

.video-play i {
    margin-left: 0.2rem;
}

.video-facade:hover .video-play {
    transform: translate(-50%, -50%) scale(1.08);
}

.video-facade:focus-visible {
    outline: 3px solid var(--accent-cyan);
    outline-offset: -3px;
}

.about-video figcaption {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 0.25rem 0.75rem;
    margin-top: 0.75rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.about-video figcaption .fa-youtube {
    color: #ff3d3d;
}

.about-video figcaption a {
    color: var(--accent-cyan);
    font-weight: 600;
}

.about-video figcaption a:hover {
    text-decoration: underline;
}

@media (max-width: 900px) {
    .about-intro,
    .about-intro.is-portrait {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-intro .section-header {
        text-align: center;
    }

    .about-intro .section-description {
        max-width: 680px;
        margin: 0 auto;
    }

    .about-actions {
        justify-content: center;
    }

    .about-video.is-portrait {
        width: 100%;
        max-width: 320px;
        margin: 0 auto;
    }
}

/* =====================================================================
   研究紹介カードの図・写真（すべて同じ大きさ 16:9）
   ===================================================================== */
.card-media {
    position: relative;
    aspect-ratio: 16 / 9;
    margin: -2rem -2rem 1.5rem;
    border-radius: calc(var(--radius-lg) - 1px) calc(var(--radius-lg) - 1px) 0 0;
    overflow: hidden;
    background:
        radial-gradient(circle at 25% 20%, rgba(0, 242, 254, 0.16), transparent 60%),
        radial-gradient(circle at 80% 90%, rgba(127, 0, 255, 0.16), transparent 55%),
        var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.card-media img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 図（グラフや模式図）など、切り取らずに全体を見せたいとき：<figure class="card-media fit-contain"> */
.card-media.fit-contain img {
    object-fit: contain;
    background: #fff;
}

.theme-card:hover .card-media img {
    transform: scale(1.04);
}

.card-media.fit-contain img,
.theme-card:hover .card-media.fit-contain img {
    transform: none;
}

/* 画像が無いときのアイコン */
.card-media-icon {
    position: absolute;
    left: 50%;
    top: 50%;
    font-size: 3.25rem;
    opacity: 0.6;
    transform: translate(-50%, -50%);
}

.card-media.has-image .card-media-icon {
    display: none;
}

/* 動画があるカードは、画像の右下に再生マーク */
.has-short .card-media::after {
    content: "\f04b";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    position: absolute;
    right: 0.9rem;
    bottom: 0.9rem;
    width: 2.6rem;
    height: 2.6rem;
    display: grid;
    place-items: center;
    padding-left: 0.15rem;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    color: var(--on-accent);
    font-size: 0.95rem;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
}

/* 「動画を見る」ボタンを各カードの下端にそろえる */
.theme-card {
    display: flex;
    flex-direction: column;
}

.theme-card > .play-badge {
    align-self: flex-start;
    margin-top: auto;
}

.theme-card > :has(+ .play-badge) {
    margin-bottom: 1rem;
}

@media (max-width: 600px) {
    .card-media {
        margin: -1.5rem -1.5rem 1.25rem;
    }
}

/* =====================================================================
   研究紹介：これまでの研究（小さめのカード）
   ===================================================================== */
.past-jump {
    margin-top: 1.25rem;
}

.past-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(260px, 100%), 1fr));
    gap: 1.5rem;
}

.past-card {
    padding: 1.5rem;
}

.past-card .card-media {
    margin: -1.5rem -1.5rem 1.1rem;
}

.past-card .card-media-icon {
    font-size: 2.6rem;
}

.past-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.3rem 0.75rem;
    margin-bottom: 0.4rem;
}

.past-period {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    color: var(--accent-cyan);
}

.past-award {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--accent-purple-text);
}


.past-card h4 {
    font-size: 1.02rem;
    line-height: 1.45;
    margin-bottom: 0.5rem;
}

.past-card .card-text {
    font-size: 0.85rem;
}

.past-card .theme-links {
    margin-top: auto;
    padding-top: 1rem;
}

.past-card .chip-link {
    font-size: 0.74rem;
    padding: 0.25rem 0.65rem;
}

/* 「これまでの研究」の中のまとまり（ぶるなび など） */
.past-series + .past-series {
    margin-top: 2.75rem;
}

.past-series-head {
    margin-bottom: 1.1rem;
}

.past-series-title {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    font-size: 1.02rem;
    font-weight: 700;
    color: var(--text-primary);
}

.past-series-desc {
    max-width: 760px;
    margin-top: 0.4rem;
    font-size: 0.88rem;
    line-height: 1.75;
    color: var(--text-secondary);
}

.past-series-desc a {
    color: var(--accent-cyan);
    font-weight: 600;
}

.past-series-desc a:hover {
    text-decoration: underline;
}

#past .theme-group-head .member-category-title {
    font-size: 1.15rem;
}

/* =====================================================================
   研究紹介：研究のつながり（ネットワーク図）
   ===================================================================== */
#network {
    padding-bottom: 0;
}

.net-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem 1rem;
    margin-bottom: 0.75rem;
}

.net-legend {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem 1.1rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.net-dot {
    display: inline-block;
    width: 0.75rem;
    height: 0.75rem;
    margin-right: 0.4rem;
    border-radius: 50%;
    vertical-align: -0.08em;
}

.net-dot.k-domain { background: var(--accent-purple-text); }
.net-dot.k-topic { background: var(--accent-blue); }
.net-dot.k-current { background: var(--text-primary); }
.net-dot.k-past { border: 2px solid var(--text-secondary); }

.net-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.net-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    min-width: 2.25rem;
    height: 2.25rem;
    padding: 0 0.6rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-glass);
    color: var(--text-primary);
    font: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.net-btn:hover,
.net-btn:focus-visible,
.net-btn[aria-pressed="true"] {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.net-box {
    position: relative;
    height: 560px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    background:
        radial-gradient(circle at 20% 15%, rgba(0, 242, 254, 0.08), transparent 55%),
        radial-gradient(circle at 85% 90%, rgba(127, 0, 255, 0.08), transparent 50%),
        var(--bg-card);
    overflow: hidden;
}

.net-status {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 1rem;
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.net-error,
.net-box.is-ready .net-status,
.net-box.is-error .net-status:not(.net-error) {
    display: none;
}

.net-box.is-error .net-error {
    display: grid;
}

.net-svg {
    display: block;
    width: 100%;
    height: 100%;
    cursor: grab;
}

.net-svg:active {
    cursor: grabbing;
}

.net-link {
    stroke: var(--text-muted);
    stroke-opacity: 0.32;
    stroke-width: 1.2;
    transition: opacity 0.2s, stroke 0.2s;
}

.net-link.k-domain {
    stroke-dasharray: 2 5;
    stroke-opacity: 0.12;
}

.net-node {
    cursor: grab;
    touch-action: none;   /* 点の上では指でなぞると点を動かす（ページはスクロールしない） */
    transition: opacity 0.2s;
}

.net-node.is-dragging {
    cursor: grabbing;
}

/* 動かして固定した点は、外側に細い輪を表示 */
.net-node.is-pinned circle {
    stroke: var(--accent-cyan);
    stroke-dasharray: 2 2;
}

.net-node circle {
    stroke: var(--bg-primary);
    stroke-width: 2;
}

.net-node.k-domain circle { fill: var(--accent-purple-text); }
.net-node.k-topic circle { fill: var(--accent-blue); }
.net-node.k-current circle { fill: var(--text-primary); }

.net-node.k-past circle {
    fill: var(--bg-secondary);
    stroke: var(--text-secondary);
}

.net-label {
    font-size: calc(10.5px * var(--net-font, 1));
    fill: var(--text-secondary);
    paint-order: stroke;
    stroke: var(--bg-primary);
    stroke-width: 3px;
    stroke-linejoin: round;
    pointer-events: none;
}

.net-node.k-domain .net-label {
    font-size: calc(12.5px * var(--net-font, 1));
    font-weight: 700;
    fill: var(--text-primary);
}

.net-node.k-topic .net-label {
    font-size: calc(11.5px * var(--net-font, 1));
    font-weight: 700;
    fill: var(--accent-blue);
}

/* 研究の名前は、関連する点を選んだときと「名前をすべて表示」のときだけ出す */
.net-node.k-current .net-label,
.net-node.k-past .net-label {
    display: none;
}

.net-box.labels-all .net-node .net-label,
.net-node.is-on .net-label {
    display: inline;
}

.net-box.has-focus .net-node:not(.is-on) {
    opacity: 0.15;
}

.net-box.has-focus .net-link:not(.is-on) {
    opacity: 0.06;
}

.net-link.is-on {
    stroke: var(--accent-cyan);
    stroke-opacity: 0.85;
}

.net-node:focus {
    outline: none;
}

.net-node:focus-visible circle,
.net-node.is-selected circle {
    stroke: var(--accent-cyan);
    stroke-width: 3;
}

.net-hint {
    margin-top: 0.6rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* クリックしたときの説明パネル */
.net-panel {
    position: absolute;
    right: 1rem;
    bottom: 1rem;
    width: 330px;
    max-height: calc(100% - 2rem);
    overflow-y: auto;
    padding: 1.25rem;
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
}

.net-panel[hidden] {
    display: none;
}

.net-panel-close {
    position: absolute;
    top: 0.6rem;
    right: 0.6rem;
    width: 2rem;
    height: 2rem;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    background: var(--bg-glass);
    color: var(--text-primary);
    cursor: pointer;
}

.net-panel-close:hover,
.net-panel-close:focus-visible {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.net-badge {
    display: inline-block;
    margin-bottom: 0.4rem;
    padding: 0.15rem 0.55rem;
    border-radius: 4px;
    font-size: 0.72rem;
    font-weight: 700;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.net-badge.k-domain { color: var(--accent-purple-text); }
.net-badge.k-topic { color: var(--accent-blue); }

.net-title {
    padding-right: 2rem;
    margin-bottom: 0.4rem;
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1.45;
}

.net-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.net-sub {
    margin: 0.9rem 0 0.4rem;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
}

.net-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 0.9rem;
}

.net-actions .chip-link,
.net-related button {
    font-size: 0.75rem;
}

.net-related {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.net-related button {
    padding: 0.25rem 0.65rem;
    border: 1px solid var(--border-color);
    border-radius: 30px;
    background: var(--bg-glass);
    color: var(--text-primary);
    font-family: inherit;
    text-align: left;
    cursor: pointer;
}

.net-related button:hover,
.net-related button:focus-visible {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.net-related .is-past {
    color: var(--text-secondary);
}

/* 図から移動したカードを一瞬強調 */
.theme-card.is-flash {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(0, 242, 254, 0.35), var(--shadow-hover);
}

@media (max-width: 600px) {
    .net-box {
        height: 560px;
    }

    .net-panel {
        left: 0.75rem;
        right: 0.75rem;
        bottom: 0.75rem;
        width: auto;
        max-height: 60%;
    }
}

/* =====================================================================
   ニュース：詳しい記事（ポップアップ）
   ===================================================================== */
.news-card.has-article {
    cursor: pointer;
}

.news-more {
    flex: none;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--accent-cyan);
    white-space: nowrap;
    transition: var(--transition);
}

.news-card:hover .news-more,
.news-more:hover,
.news-more:focus-visible {
    border-color: var(--accent-cyan);
    background: var(--bg-glass);
}

.news-more i {
    font-size: 0.72rem;
    transition: transform 0.2s;
}

.news-card:hover .news-more i {
    transform: translateX(2px);
}

.news-card:hover .news-more.is-external i {
    transform: translate(1px, -1px);
}

.article-dialog {
    margin: auto;   /* 全体の margin: 0 を打ち消して画面中央に表示 */
    width: min(92vw, 720px);
    max-width: none;
    max-height: none;
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--text-primary);
    overflow: visible;
}

.article-dialog::backdrop {
    background: rgba(5, 8, 14, 0.82);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
}

.article-dialog-inner {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
    overflow: hidden;
}

.article-dialog-body {
    max-height: calc(100vh - 3rem);
    max-height: calc(100dvh - 3rem);
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 2rem 2.25rem 2rem;
}

.article-dialog-close {
    position: absolute;
    top: 0.9rem;
    right: 0.9rem;
    z-index: 1;
    width: 2.25rem;
    height: 2.25rem;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.article-dialog-close:hover,
.article-dialog-close:focus-visible {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.news-article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 0.85rem;
    margin-bottom: 0.7rem;
    padding-right: 2.75rem;
}

.news-article-meta time {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}

.news-article-meta .news-badge {
    min-width: 0;
}

.news-article-title {
    font-size: 1.35rem;
    line-height: 1.5;
    margin-bottom: 1.25rem;
    padding-right: 2.75rem;
}

.news-article-photo {
    margin: 0 0 1.4rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bg-card);
}

.news-article-photo img {
    display: block;
    width: 100%;
    height: auto;
    max-height: 420px;
    object-fit: contain;
}

.news-article > p {
    font-size: 0.95rem;
    line-height: 1.9;
    color: var(--text-secondary);
    margin-bottom: 0.9rem;
}

.news-article-facts {
    display: grid;
    grid-template-columns: max-content minmax(0, 1fr);
    gap: 0.55rem 1.1rem;
    margin: 1.4rem 0 1.6rem;
    padding: 1.1rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.88rem;
    line-height: 1.7;
}

.news-article-facts dt {
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
}

.news-article-facts dd {
    margin: 0;
    color: var(--text-secondary);
    overflow-wrap: anywhere;
}

.news-article-works {
    display: grid;
    gap: 0.6rem;
    margin: 0 0 1.6rem;
    padding-left: 1.4rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.news-article-works li::marker {
    color: var(--accent-cyan);
    font-weight: 700;
}

.work-title {
    display: block;
    font-weight: 700;
    color: var(--text-primary);
}

.work-authors {
    display: block;
    font-size: 0.82rem;
}

.news-article-sub {
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    margin-bottom: 0.6rem;
}

.news-article-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    list-style: none;
}

.news-article-links .chip-link {
    font-size: 0.8rem;
}

@media (max-width: 600px) {
    .article-dialog-body {
        padding: 1.5rem 1.25rem 1.5rem;
    }

    .news-article-title {
        font-size: 1.15rem;
    }

    .news-article-facts {
        grid-template-columns: minmax(0, 1fr);
        gap: 0.1rem;
    }

    .news-article-facts dd + dt {
        margin-top: 0.55rem;
    }
}

/* =====================================================================
   旧サイトの記事へのリンクで来た人への案内
   ===================================================================== */
.old-site-bar {
    position: fixed;
    left: 50%;
    bottom: 1.25rem;
    z-index: 1000;
    transform: translateX(-50%);
    width: max-content;
    max-width: calc(100vw - 2rem);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 0.9rem;
    padding: 0.75rem 0.75rem 0.75rem 1.1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.old-site-bar a {
    color: var(--accent-cyan);
    font-weight: 700;
}

.old-site-bar a:hover {
    text-decoration: underline;
}

.old-site-bar button {
    width: 2rem;
    height: 2rem;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
}

.old-site-bar button:hover,
.old-site-bar button:focus-visible {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

/* =====================================================================
   トップページ：進学を希望する方への募集のお知らせ
   ===================================================================== */
.admit-box {
    position: relative;
    overflow: hidden;
    margin: 0 0 2.5rem;
    padding: 1.9rem 2rem 1.8rem 2.25rem;
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-lg);
    background: var(--bg-card);
}

.admit-box::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 4px;
    background: linear-gradient(var(--accent-cyan), var(--accent-purple));
}

.admit-head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 0.8rem;
    margin-bottom: 0.6rem;
}

.admit-head h3 {
    font-size: 1.3rem;
    line-height: 1.45;
}

.admit-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    background: rgba(0, 242, 254, 0.14);
    color: var(--accent-cyan);
    font-size: 0.8rem;
    font-weight: 700;
}

.admit-lead {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.admit-steps {
    list-style: none;
    counter-reset: admit;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    margin-bottom: 1.1rem;
}

.admit-steps li {
    counter-increment: admit;
    position: relative;
    padding: 1rem 1.1rem 1.05rem 3.2rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    font-size: 0.88rem;
    line-height: 1.75;
    color: var(--text-secondary);
}

.admit-steps li::before {
    content: counter(admit);
    position: absolute;
    left: 1rem;
    top: 0.95rem;
    width: 1.7rem;
    height: 1.7rem;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--accent-cyan);
    color: var(--on-accent);
    font-weight: 800;
    font-size: 0.82rem;
}

.admit-steps strong {
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.admit-steps em {
    font-style: normal;
    font-weight: 700;
    color: var(--text-primary);
}

.admit-note {
    display: flex;
    gap: 0.5rem;
    align-items: baseline;
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin-bottom: 1.2rem;
}

.admit-note i {
    color: var(--accent-cyan);
}

.admit-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

/* お問い合わせ欄：見学についての FAQ へのリンク */
.contact-faq {
    margin-top: 0.9rem;
    text-align: center;
}

/* 企業の方：相談の始め方 */
.collab-howto {
    display: flex;
    gap: 0.6rem;
    align-items: baseline;
    max-width: 760px;
    margin: 1.75rem auto 0;
    font-size: 0.9rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.collab-howto i {
    color: var(--accent-cyan);
}

.collab-howto strong {
    color: var(--text-primary);
}

.collab-checklist {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.8rem;
    max-width: 860px;
    margin: 1.25rem auto 1.4rem;
    text-align: left;
}

.collab-checklist li {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
    padding: 0.95rem 1.05rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    font-size: 0.84rem;
    line-height: 1.65;
    color: var(--text-secondary);
}

.collab-checklist i {
    flex: none;
    margin-top: 0.2rem;
    color: var(--accent-cyan);
}

.collab-checklist strong {
    display: block;
    font-size: 0.92rem;
    color: var(--text-primary);
}

@media (max-width: 900px) {
    .admit-steps,
    .collab-checklist {
        grid-template-columns: minmax(0, 1fr);
    }
}

@media (max-width: 600px) {
    .admit-box {
        padding: 1.4rem 1.2rem 1.3rem 1.4rem;
    }

    .admit-head h3 {
        font-size: 1.12rem;
    }
}

/* 文中のリンク（例：研究生の制度へのリンク） */
.inline-link {
    color: var(--accent-cyan);
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.inline-link:hover {
    text-decoration-thickness: 2px;
}

/* 論文・発表の件数（トップページの主要論文。数字は main.js が publications.html から数え直す） */
.pub-stats {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
    margin-bottom: 0.6rem;
}

.pub-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 1.4rem 1rem;
    text-align: center;
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(var(--particle-rgb), 0.05) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

.pub-stat:hover,
.pub-stat:focus-visible {
    border-color: var(--accent-cyan);
    transform: translateY(-3px);
}

.pub-stat-num {
    font-size: 2.6rem;
    font-weight: 800;
    line-height: 1.1;
    color: var(--accent-cyan);
    font-variant-numeric: tabular-nums;
}

.pub-stat-plus {
    font-size: 0.75em;
    margin-left: 0.05em;
}

.pub-stat-label {
    font-size: 0.85rem;
    font-weight: 600;
    line-height: 1.4;
    color: var(--text-secondary);
}

.pub-stats-note {
    text-align: right;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

@media (max-width: 760px) {
    .pub-stats {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .pub-stat {
        padding: 1.1rem 0.75rem;
    }

    .pub-stat-num {
        font-size: 2.1rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .pub-stat:hover,
    .pub-stat:focus-visible {
        transform: none;
    }
}