:root {
    --bg: #0a0a0a;
    --panel: #121212;
    --text: #eaeaea;
    --muted: #a7a7a7;
    --accent: #00c7d9;
    --line: #2a2a2a;
}

.intro {
    max-width: 1100px;
    margin: 140px auto 44px;
    padding: 0 20px;
    text-align: center;
}

.intro h2 {
    margin: 0 0 14px;
    font-size: 2rem;
}

.intro p {
    color: #ccc;
    margin: 0;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px 80px;
}

.breadcrumb {
    color: var(--muted);
    font-size: 0.92rem;
    margin-bottom: 18px;
}

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

.breadcrumb a:hover {
    text-decoration: underline;
}

.hero {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 18px;
    margin-bottom: 22px;
}

.card,
.panel {
    background: linear-gradient(180deg, #121212, #0f0f0f);
    border: 1px solid #1f1f1f;
    border-radius: 14px;
    box-shadow: 0 8px 26px rgba(0, 0, 0, 0.35);
}

.card {
    padding: 18px;
}

.photo {
    width: 100%;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid #2a2a2a;
    margin-bottom: 14px;
}

.photo img {
    width: 100%;
    height: auto;
    display: block;
}

.profile-name-ja {
    margin: 0;
    font-size: 1.5rem;
}

.profile-name-en {
    margin: 4px 0 10px;
    color: var(--muted);
    font-size: 0.95rem;
}

.affiliation {
    color: #cfcfcf;
    font-size: 0.92rem;
    line-height: 1.65;
    border-top: 1px solid #2a2a2a;
    padding-top: 10px;
}

.link-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-top: 12px;
}

.link-grid a {
    border: 1px solid #2a2a2a;
    border-radius: 999px;
    text-align: center;
    padding: 8px 10px;
    color: var(--accent);
    font-size: 0.78rem;
    text-decoration: none;
    background: rgba(0, 199, 217, 0.08);
}

.link-grid a:hover {
    background: rgba(0, 199, 217, 0.2);
}

.panel {
    padding: 24px;
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--accent);
    font-size: 0.8rem;
    letter-spacing: 0.08em;
}

.panel h1 {
    margin: 0 0 10px;
    font-size: clamp(1.8rem, 4.8vw, 3.2rem);
    line-height: 1.2;
}

.panel p {
    margin: 0;
    color: #cfcfcf;
}

.keyword-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
}

.keyword {
    border: 1px solid #2a2a2a;
    border-radius: 999px;
    color: #bfeaf0;
    font-size: 0.78rem;
    padding: 4px 10px;
}

.layout {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 16px;
    align-items: start;
}

.toc {
    position: sticky;
    top: 84px;
    border: 1px solid #1f1f1f;
    border-radius: 14px;
    background: #101010;
    padding: 14px;
}

.toc-title {
    color: var(--muted);
    font-size: 0.78rem;
    margin-bottom: 10px;
}

.toc a {
    display: block;
    color: var(--muted);
    text-decoration: none;
    border-bottom: 1px solid #1f1f1f;
    padding: 8px 0;
    font-size: 0.9rem;
}

.toc a:last-child {
    border-bottom: 0;
}

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

.content {
    display: grid;
    gap: 14px;
}

.sec {
    border: 1px solid #1f1f1f;
    border-radius: 14px;
    background: linear-gradient(180deg, #121212, #0f0f0f);
    padding: 22px;
}

.sec-head {
    border-bottom: 1px solid #1f1f1f;
    padding-bottom: 12px;
    margin-bottom: 14px;
}

.sec h2 {
    margin: 0;
    font-size: 1.5rem;
}

.sec-sub {
    color: var(--muted);
    font-size: 0.85rem;
}

.group {
    margin-top: 16px;
}

.group h3 {
    margin: 0 0 10px;
    color: var(--accent);
    font-size: 1rem;
}

.item {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 16px;
    padding: 10px 0;
    border-bottom: 1px solid #1f1f1f;
}

.item:last-child {
    border-bottom: 0;
}

.year {
    color: var(--muted);
    font-size: 0.82rem;
}

.item-title {
    margin: 0 0 4px;
    font-weight: 700;
}

.item-desc {
    margin: 0;
    color: #cfcfcf;
    font-size: 0.9rem;
}

.cards {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.mini-card {
    border: 1px solid #2a2a2a;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.03);
    padding: 12px;
    color: #d8d8d8;
    text-decoration: none;
}

.mini-card strong {
    color: var(--accent);
    display: block;
    margin-bottom: 5px;
}

.mini-card span {
    font-size: 0.82rem;
    color: #c5c5c5;
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    border: 1px solid #2a2a2a;
    border-radius: 999px;
    padding: 4px 9px;
    color: #d0f2f6;
    font-size: 0.82rem;
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.course {
    border: 1px solid #2a2a2a;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.03);
    padding: 12px;
}

.course strong {
    display: block;
    margin-bottom: 5px;
}

.course p {
    margin: 0;
    color: #c5c5c5;
    font-size: 0.85rem;
}

.footer-note {
    text-align: center;
    color: var(--muted);
    margin-top: 18px;
    font-size: 0.82rem;
}

@media (max-width: 900px) {
    .hero,
    .layout {
        grid-template-columns: 1fr;
    }

    .toc {
        position: static;
    }

    .cards,
    .course-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 560px) {
    .intro {
        margin-top: 100px;
    }

    .container {
        padding-left: 14px;
        padding-right: 14px;
    }

    .item {
        grid-template-columns: 1fr;
        gap: 4px;
    }
}