/* QUB ML Lab shared styles */
:root {
    --qub-red: #d6004f;
    --qub-red-dark: #a9003d;
    --ink: #2d2f33;
    --muted: #646b73;
    --line: #e3e7eb;
    --paper: #ffffff;
    --soft: #f5f7f9;
    --soft-red: #fff1f5;
    --blue: #315f8c;
    --green: #357766;
    --shadow: 0 18px 45px rgba(28, 35, 43, 0.08);
    --shadow-soft: 0 12px 28px rgba(28, 35, 43, 0.06);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--ink);
    background:
        linear-gradient(180deg, rgba(245, 247, 249, 0.62) 0, rgba(255, 255, 255, 0) 220px),
        var(--paper);
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 15.5px;
    line-height: 1.62;
}

a {
    color: var(--qub-red);
    text-decoration: none;
    transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

a:hover {
    color: var(--qub-red-dark);
}

a:focus-visible,
button:focus-visible {
    outline: 3px solid rgba(214, 0, 79, 0.28);
    outline-offset: 3px;
}

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 0 rgba(28, 35, 43, 0.02);
}

.nav-container {
    width: min(1120px, calc(100% - 48px));
    min-height: 72px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
}

.nav-toggle {
    display: none;
    position: relative;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    color: var(--ink);
    cursor: pointer;
    transition: border-color 0.18s ease, background-color 0.18s ease, box-shadow 0.18s ease;
}

.nav-toggle:hover {
    border-color: rgba(214, 0, 79, 0.35);
    box-shadow: var(--shadow-soft);
}

.nav-toggle span {
    position: absolute;
    display: block;
    width: 18px;
    height: 2px;
    border-radius: 999px;
    background: currentColor;
    transition: opacity 0.12s ease;
}

.nav-toggle span:nth-child(1) {
    transform: translateY(-7px);
}

.nav-toggle span:nth-child(3) {
    transform: translateY(7px);
}

.site-header.nav-open .nav-toggle {
    color: var(--qub-red);
}

.site-header.nav-open .nav-toggle span:nth-child(1) {
    transform: translateY(0) rotate(45deg);
}

.site-header.nav-open .nav-toggle span:nth-child(2) {
    opacity: 0;
}

.site-header.nav-open .nav-toggle span:nth-child(3) {
    transform: translateY(0) rotate(-45deg);
}

.logo {
    display: inline-flex;
    align-items: baseline;
    gap: 8px;
    color: var(--ink);
    font-size: 1.28rem;
    font-weight: 800;
    letter-spacing: 0;
    white-space: nowrap;
}

.logo span {
    color: var(--qub-red);
}

.logo small {
    color: var(--muted);
    font-size: 0.64rem;
    font-weight: 700;
    letter-spacing: 0;
}

.nav-links {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 24px;
    flex-wrap: wrap;
}

.nav-links a {
    color: var(--ink);
    font-size: 0.9rem;
    font-weight: 700;
    line-height: 1.2;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
    color: var(--qub-red);
}

.nav-links a[aria-current="page"] {
    text-underline-offset: 8px;
    text-decoration: underline;
    text-decoration-thickness: 2px;
}

main {
    min-height: calc(100vh - 156px);
}

.section {
    width: min(1120px, calc(100% - 48px));
    margin: 0 auto;
    padding: 68px 0;
}

.section.compact {
    padding-top: 44px;
}

.page-title {
    margin: 0 0 28px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--line);
    color: var(--ink);
    font-size: 2.42rem;
    line-height: 1.16;
    font-weight: 800;
    letter-spacing: 0;
}

.lead {
    max-width: 860px;
    margin: 0 0 32px;
    color: var(--muted);
    font-size: 1.04rem;
}

.eyebrow {
    margin: 0 0 14px;
    color: var(--qub-red);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.button-row {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
}

.button,
.button-secondary {
    display: inline-flex;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    border-radius: 7px;
    padding: 0 18px;
    font-weight: 800;
    line-height: 1;
}

.button {
    background: var(--qub-red);
    color: #fff;
    box-shadow: 0 10px 24px rgba(214, 0, 79, 0.18);
}

.button:hover {
    background: var(--qub-red-dark);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 14px 30px rgba(214, 0, 79, 0.22);
}

.button-secondary {
    border: 1px solid var(--line);
    color: var(--ink);
    background: #fff;
}

.button-secondary:hover {
    border-color: var(--qub-red);
    color: var(--qub-red);
    transform: translateY(-1px);
    box-shadow: var(--shadow-soft);
}

.hero {
    width: min(1120px, calc(100% - 48px));
    min-height: 500px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(340px, 0.92fr);
    gap: 40px;
    align-items: center;
    padding: 50px 0 42px;
}

.hero h1 {
    max-width: 780px;
    margin: 0 0 16px;
    color: var(--ink);
    font-size: 3.28rem;
    line-height: 1.05;
    font-weight: 800;
    letter-spacing: 0;
}

.hero-copy {
    max-width: 720px;
}

.hero-copy .lead {
    margin-bottom: 24px;
    font-size: 1.02rem;
}

.hero-visual {
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--soft);
    box-shadow: var(--shadow);
    transform: translateZ(0);
}

.hero-visual img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
}

.news-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.news-list li {
    display: grid;
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 20px;
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
}

.news-date {
    color: var(--qub-red);
    font-weight: 800;
}

.focus-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
}

.focus-item {
    padding: 0 0 0 18px;
    border-left: 4px solid var(--qub-red);
}

.focus-item:nth-child(2) {
    border-left-color: var(--blue);
}

.focus-item:nth-child(3) {
    border-left-color: var(--green);
}

.focus-item h3 {
    margin: 0 0 8px;
    font-size: 1.08rem;
    line-height: 1.25;
}

.focus-item p {
    margin: 0;
    color: var(--muted);
}

.cards-grid,
.research-grid,
.member-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
}

.card,
.research-card,
.join-box,
.member-card {
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 1px 0 rgba(28, 35, 43, 0.02);
}

.card,
.research-card,
.member-card {
    padding: 24px;
}

.card h2,
.card h3,
.research-card h2,
.join-box h2,
.member-card h3 {
    margin: 0 0 12px;
    line-height: 1.25;
    font-size: 1.16rem;
}

.card p,
.research-card p,
.join-box p,
.member-card p {
    margin: 0;
    color: var(--muted);
}

.research-card {
    border-top: 4px solid var(--qub-red);
}

.research-card:nth-child(2) {
    border-top-color: var(--blue);
}

.research-card:nth-child(3) {
    border-top-color: var(--green);
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 18px 0;
}

.tag-list span {
    display: inline-flex;
    min-height: 30px;
    align-items: center;
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 0 12px;
    background: var(--soft);
    color: var(--muted);
    font-size: 0.82rem;
    line-height: 1;
}

.profile {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 34px;
    align-items: start;
    margin-bottom: 48px;
}

.profile-photo {
    width: 220px;
    height: 220px;
    border: 1px solid var(--line);
    border-radius: 8px;
    object-fit: cover;
    object-position: 50% 32%;
    box-shadow: var(--shadow);
}

.profile h2 {
    margin: 0 0 6px;
    font-size: 1.88rem;
    line-height: 1.2;
}

.profile-role {
    margin: 0 0 18px;
    color: var(--qub-red);
    font-size: 1.02rem;
    font-weight: 700;
}

.profile p {
    margin: 0 0 14px;
}

.member-card {
    background: var(--soft);
}

.member-card p + p {
    margin-top: 4px;
}

.member-status {
    margin-bottom: 8px;
    color: var(--qub-red);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.link-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 18px;
    margin-top: 20px;
}

.timeline,
.pub-list,
.plain-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.timeline li {
    display: grid;
    grid-template-columns: 135px minmax(0, 1fr);
    gap: 20px;
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
}

.timeline time,
.pub-venue {
    color: var(--qub-red);
    font-weight: 700;
}

.pub-year {
    margin: 48px 0 18px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--line);
    font-size: 1.45rem;
}

.pub-item {
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
}

.pub-title {
    margin-bottom: 6px;
    color: var(--ink);
    font-weight: 800;
}

.pub-authors,
.pub-note {
    color: var(--muted);
    font-size: 0.92rem;
}

.pub-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 10px;
}

.pub-links a {
    display: inline-flex;
    min-height: 32px;
    align-items: center;
    border: 1px solid var(--qub-red);
    border-radius: 6px;
    padding: 0 10px;
    font-size: 0.82rem;
    font-weight: 800;
}

.pub-empty {
    margin: 34px 0 0;
    color: var(--muted);
}

.join-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
}

.join-box {
    padding: 28px;
    border-left: 5px solid var(--qub-red);
    background: var(--soft);
}

.join-box ul,
.plain-list {
    margin: 14px 0 0;
    padding-left: 20px;
}

.plain-list li,
.join-box li {
    margin: 8px 0;
}

.notice {
    margin: 34px 0;
    padding: 22px 24px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--soft-red);
}

.notice p {
    margin: 0;
}

.site-footer {
    border-top: 1px solid var(--line);
    padding: 28px 24px;
    color: var(--muted);
    text-align: center;
    font-size: 0.88rem;
}

@media (hover: hover) {
    .card:hover,
    .research-card:hover,
    .join-box:hover,
    .member-card:hover {
        transform: translateY(-2px);
        box-shadow: var(--shadow-soft);
    }
}

.card,
.research-card,
.join-box,
.member-card {
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

@media (max-width: 900px) {
    .nav-container {
        min-height: auto;
        padding: 16px 0;
        align-items: flex-start;
        flex-direction: column;
        gap: 12px;
    }

    .nav-links {
        justify-content: flex-start;
        gap: 10px 18px;
    }

    .hero {
        min-height: 0;
        grid-template-columns: 1fr;
        gap: 28px;
        padding: 38px 0;
    }

    .hero h1 {
        font-size: 2.56rem;
    }

    .cards-grid,
    .focus-grid,
    .research-grid,
    .member-grid,
    .join-grid {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 760px) {
    .nav-container {
        position: relative;
        min-height: 64px;
        align-items: center;
        flex-direction: row;
        gap: 14px;
    }

    .nav-toggle {
        display: inline-flex;
        margin-left: auto;
    }

    .nav-links {
        position: absolute;
        z-index: 30;
        top: calc(100% + 8px);
        right: 0;
        left: 0;
        display: grid;
        grid-template-columns: 1fr;
        gap: 2px;
        padding: 8px;
        border: 1px solid var(--line);
        border-radius: 8px;
        background: #fff;
        box-shadow: var(--shadow);
        visibility: hidden;
        pointer-events: none;
        transform: translateY(-8px);
        transition: transform 0.18s ease, visibility 0s linear 0.18s;
    }

    .site-header.nav-open .nav-links {
        visibility: visible;
        pointer-events: auto;
        transform: translateY(0);
        transition: transform 0.18s ease;
    }

    .nav-links a {
        display: flex;
        min-height: 42px;
        align-items: center;
        border-radius: 6px;
        padding: 0 12px;
    }

    .nav-links a:hover,
    .nav-links a[aria-current="page"] {
        background: var(--soft-red);
        text-decoration: none;
    }
}

@media (max-width: 560px) {
    body {
        font-size: 14.75px;
    }

    .nav-container,
    .section,
    .hero {
        width: min(100% - 32px, 1120px);
    }

    .logo {
        font-size: 1.14rem;
        flex-wrap: wrap;
        gap: 4px 7px;
    }

    .logo small {
        font-size: 0.6rem;
    }

    .nav-links a {
        font-size: 0.86rem;
    }

    .hero h1,
    .page-title {
        font-size: 2.08rem;
    }

    .hero-copy .lead,
    .lead {
        font-size: 0.96rem;
    }

    .section {
        padding: 42px 0;
    }

    .news-list li,
    .timeline li {
        grid-template-columns: 1fr;
        gap: 6px;
    }

    .profile-photo {
        width: 160px;
        height: 160px;
    }

    .join-box,
    .card,
    .research-card,
    .member-card {
        padding: 20px;
    }

    .focus-item {
        padding-left: 14px;
    }
}