/* ==========================================================================
   Rak-Kyeong Seong Research Group — site design layer
   Loaded after bootstrap.css; owns typography, spacing, buttons, archives.
   Palette is unchanged: primary #426d8c, secondary #0b2e3f.
   ========================================================================== */

:root {
    --brand-primary: #426d8c;
    --brand-primary-dark: #35586f;
    --brand-secondary: #0b2e3f;
    --brand-secondary-soft: #143d51;

    --ink: #15242e;
    --ink-soft: #3c4d59;
    --ink-muted: #6b7b86;
    --ink-faint: #93a1aa;

    --rule: #dfe5ea;
    --rule-strong: #c4cfd7;
    --surface: #ffffff;
    --surface-tint: #f4f7f9;
    --surface-tint-2: #eaeff3;

    --font-serif: "Source Serif 4", "Iowan Old Style", Georgia, "Times New Roman", serif;
    --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

    /* one vertical rhythm for every section on every page */
    --section-y: clamp(3.25rem, 5.5vw, 5.25rem);
    --gutter: clamp(1.25rem, 3vw, 2.5rem);
    --radius: 3px;
    --nav-h: 92px;
}

/* --------------------------------------------------------------- base ---- */

html {
    scroll-behavior: smooth;
}

body,
body.text-muted {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.65;
    color: var(--ink-soft);
    background: var(--surface);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    color: var(--ink);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.01em;
}

a {
    color: var(--brand-primary);
    text-decoration: none;
    text-underline-offset: 0.18em;
}

a:hover {
    color: var(--brand-primary-dark);
    text-decoration: underline;
}

img {
    max-width: 100%;
}

hr {
    border-color: var(--rule);
    opacity: 1;
}

::selection {
    background: rgba(66, 109, 140, 0.18);
}

/* ---------------------------------------------------------- typography ---- */

.u-kicker {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--brand-primary);
    margin: 0 0 0.75rem;
    line-height: 1.4;
}

.u-kicker--light {
    color: #9fc2d8;
}

.u-lead {
    font-size: clamp(1.05rem, 1.6vw, 1.2rem);
    line-height: 1.6;
    color: var(--ink-soft);
    max-width: 62ch;
}

.u-lead--light {
    color: rgba(255, 255, 255, 0.82);
}

.u-measure {
    max-width: 68ch;
}

.u-center {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.u-mono-num {
    font-variant-numeric: tabular-nums;
}

/* ------------------------------------------------------------- layout ---- */

.wrap {
    width: min(1180px, 100% - (2 * var(--gutter)));
    margin-inline: auto;
}

.wrap--narrow {
    width: min(920px, 100% - (2 * var(--gutter)));
}

.wrap--wide {
    width: min(1320px, 100% - (2 * var(--gutter)));
}

.section {
    padding-block: var(--section-y);
}

.section--tight {
    padding-block: calc(var(--section-y) * 0.62);
}

.section--tint {
    background: var(--surface-tint);
}

.section--deep {
    background: var(--brand-secondary);
    color: rgba(255, 255, 255, 0.82);
}

.section--brand {
    background: var(--brand-primary);
    color: rgba(255, 255, 255, 0.9);
}

.section--deep h1, .section--deep h2, .section--deep h3, .section--deep h4,
.section--brand h1, .section--brand h2, .section--brand h3, .section--brand h4 {
    color: #fff;
}

.section-head {
    margin-bottom: clamp(2rem, 3.5vw, 3rem);
}

.section-head--center {
    text-align: center;
    margin-inline: auto;
    max-width: 46rem;
}

.section-title {
    font-size: clamp(1.75rem, 3vw, 2.35rem);
    margin: 0;
}

.section-sub {
    margin: 0.85rem 0 0;
    color: var(--ink-muted);
    font-size: 1rem;
}

.section--deep .section-sub,
.section--brand .section-sub {
    color: rgba(255, 255, 255, 0.72);
}

.rule {
    height: 1px;
    background: var(--rule);
    border: 0;
    margin: 0;
}

[id] {
    scroll-margin-top: calc(var(--nav-h) + 1.5rem);
}

/* ---------------------------------------------------------- navigation --- */

.site-nav {
    position: sticky;
    top: 0;
    z-index: 1030;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: saturate(140%) blur(8px);
    border-bottom: 1px solid var(--rule);
    padding-block: 0.75rem;
}

.site-nav .navbar-brand {
    padding: 0;
    margin: 0;
    display: inline-flex;
    align-items: center;
}

.site-nav .brand-logo {
    height: 60px;
    width: auto;
    display: block;
}

@media (max-width: 575.98px) {
    .site-nav .brand-logo {
        height: 42px;
    }
}

.site-nav .navbar-toggler {
    border: 1px solid var(--rule-strong);
    border-radius: var(--radius);
    padding: 0.4rem 0.6rem;
}

.site-nav .navbar-toggler:focus {
    box-shadow: none;
}

.site-nav .navbar-nav {
    gap: 0.25rem;
    align-items: center;
}

.site-nav .nav-link {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-muted);
    padding: 0.55rem 0.9rem;
    position: relative;
    transition: color 0.15s ease;
}

.site-nav .nav-link:hover {
    color: var(--brand-primary);
}

.site-nav .nav-link.active {
    color: var(--brand-secondary);
}

.site-nav .nav-link.active::after {
    content: "";
    position: absolute;
    left: 0.9rem;
    right: 0.9rem;
    bottom: 0.2rem;
    height: 2px;
    background: var(--brand-primary);
}

@media (max-width: 991.98px) {
    .site-nav .navbar-nav {
        align-items: flex-start;
        padding-top: 0.75rem;
        gap: 0;
    }

    .site-nav .nav-link {
        padding-inline: 0;
    }

    .site-nav .nav-link.active::after {
        left: 0;
        right: auto;
        width: 1.75rem;
    }
}

/* -------------------------------------------------------------- buttons --- */
/* One button geometry for the whole site: same height, radius, type ramp.   */

.btn,
.btn-lg,
.btn-sm {
    --btn-h: 3rem;
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    line-height: 1;
    min-height: var(--btn-h);
    padding: 0 1.6rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    border-radius: var(--radius);
    border: 1px solid transparent;
    text-align: center;
    white-space: nowrap;
    transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.btn:focus-visible {
    outline: 2px solid var(--brand-primary);
    outline-offset: 2px;
    box-shadow: none;
}

.btn:active {
    transform: translateY(1px);
}

.btn-primary,
.btn.btn-primary {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
    color: #fff;
}

.btn-primary:hover,
.btn-primary:focus {
    background: var(--brand-primary-dark);
    border-color: var(--brand-primary-dark);
    color: #fff;
}

.btn-outline {
    background: transparent;
    border-color: var(--rule-strong);
    color: var(--ink);
}

.btn-outline:hover {
    border-color: var(--brand-primary);
    color: var(--brand-primary);
    background: rgba(66, 109, 140, 0.06);
}

.btn-on-dark {
    background: transparent;
    border-color: rgba(255, 255, 255, 0.45);
    color: #fff;
}

.btn-on-dark:hover {
    background: #fff;
    border-color: #fff;
    color: var(--brand-secondary);
}

.btn-solid-light {
    background: #fff;
    border-color: #fff;
    color: var(--brand-secondary);
}

.btn-solid-light:hover {
    background: rgba(255, 255, 255, 0.88);
    color: var(--brand-secondary);
}

/* button rows — replaces the old   spacing hacks */
.btn-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.btn-row--center {
    justify-content: center;
}

/* every button in the row renders at the same width */
.btn-row--even .btn {
    flex: 0 1 auto;
    min-width: 9.5rem;
    padding-inline: 1.1rem;
}

@media (max-width: 575.98px) {
    .btn-row--even .btn {
        flex: 1 1 40%;
        min-width: 0;
    }
}

/* ---------------------------------------------------------------- hero --- */

.hero {
    background: var(--brand-secondary);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.hero::after {
    content: "";
    position: absolute;
    inset: auto 0 0 0;
    height: 3px;
    background: var(--brand-primary);
}

.hero-grid {
    --hero-pad: clamp(3.5rem, 7vw, 6rem);
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(2rem, 5vw, 4rem);
    align-items: center;
    padding-block: var(--hero-pad);
}

.hero-title {
    font-size: clamp(2.1rem, 4.4vw, 3.4rem);
    line-height: 1.1;
    color: #fff;
    margin: 0 0 1.25rem;
    letter-spacing: -0.02em;
}

/* the artwork bleeds to the top and bottom edges of the dark band */
.hero-art {
    align-self: stretch;
    margin-block: calc(-1 * var(--hero-pad));
    min-height: 22rem;
    border-left: 1px solid rgba(255, 255, 255, 0.18);
    border-right: 1px solid rgba(255, 255, 255, 0.18);
    overflow: hidden;
    background: rgba(255, 255, 255, 0.04);
}

.hero-art img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.hero .btn-row {
    margin-top: 2rem;
}

@media (max-width: 767.98px) {
    .hero-grid {
        grid-template-columns: minmax(0, 1fr);
        gap: 2rem;
        padding-bottom: 0;
    }

    /* stacked: the artwork keeps its square crop and meets the bottom edge only */
    .hero-art {
        margin-top: 0;
        min-height: 0;
        aspect-ratio: 4 / 3;
        border-left: 0;
        border-right: 0;
        margin-inline: calc(-1 * var(--gutter));
    }
}

/* compact hero used by every interior page — identical metrics everywhere */
.page-hero {
    padding-block: clamp(2.75rem, 5vw, 4.25rem);
}

.page-hero .hero-title {
    margin-bottom: 0.75rem;
}

.page-hero__meta {
    margin: 1.5rem 0 0;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
    letter-spacing: 0.04em;
}

/* --------------------------------------------------------- filter bar ---- */

.filter-bar {
    background: var(--surface-tint);
    border-bottom: 1px solid var(--rule);
    padding-block: 1.1rem;
}

.filter-bar__inner {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    flex-wrap: wrap;
}

.filter-bar__label {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--ink-muted);
    flex: 0 0 auto;
}

.filter-bar .btn-row {
    flex: 1 1 auto;
}

/* ------------------------------------------------------------- archive --- */
/* Newspaper-style archive: dated rows, hairline rules, collapsible years.   */

.archive-year {
    border-top: 2px solid var(--brand-secondary);
    margin-top: 2.75rem;
}

.archive-year:first-of-type {
    margin-top: 0;
}

.archive-year__head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 0 1.15rem;
    cursor: pointer;
    list-style: none;
}

.archive-year__head::-webkit-details-marker {
    display: none;
}

.archive-year__num {
    font-family: var(--font-serif);
    font-size: clamp(1.6rem, 3vw, 2.1rem);
    font-weight: 600;
    color: var(--brand-secondary);
    letter-spacing: -0.01em;
    line-height: 1;
}

.archive-year__count {
    font-size: 0.78rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--ink-muted);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

details.archive-year .archive-year__toggle::after {
    content: "Show";
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--brand-primary);
    border: 1px solid var(--rule-strong);
    border-radius: var(--radius);
    padding: 0.4rem 0.75rem;
    white-space: nowrap;
}

details.archive-year[open] .archive-year__toggle::after {
    content: "Hide";
}

.archive-month {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--brand-primary);
    padding: 1.4rem 0 0.6rem;
    border-top: 1px solid var(--rule);
}

.archive-month:first-child {
    border-top: 0;
    padding-top: 0;
}

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

.archive-entry {
    display: grid;
    grid-template-columns: 8.5rem minmax(0, 1fr) 10.5rem;
    gap: clamp(1rem, 2.5vw, 2rem);
    padding: 1.35rem 0;
    border-top: 1px solid var(--rule);
    align-items: start;
}

.archive-entry:first-child {
    border-top: 0;
}

.archive-entry--nomedia {
    grid-template-columns: 8.5rem minmax(0, 1fr);
}

.archive-entry__date {
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--ink-muted);
    font-variant-numeric: tabular-nums;
    padding-top: 0.2rem;
}

.archive-entry__tag {
    display: inline-block;
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--brand-primary);
    margin-bottom: 0.4rem;
}

.archive-entry__title {
    overflow-wrap: anywhere;
    font-size: 1.1rem;
    line-height: 1.35;
    margin: 0 0 0.4rem;
    color: var(--ink);
}

.archive-entry__meta {
    margin: 0;
    overflow-wrap: anywhere;
    font-size: 0.925rem;
    color: var(--ink-muted);
    line-height: 1.6;
}

.archive-entry__meta span + span::before {
    content: " · ";
    color: var(--ink-faint);
}

.archive-entry__links {
    margin: 0.55rem 0 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem 1.1rem;
}

.link-ref {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--brand-primary);
    border-bottom: 1px solid rgba(66, 109, 140, 0.35);
    padding-bottom: 1px;
    word-break: break-word;
}

.link-ref:hover {
    text-decoration: none;
    border-bottom-color: var(--brand-primary);
}

.link-ref::after {
    content: " ↗";
    font-size: 0.72em;
    color: var(--ink-faint);
}

.archive-entry__media {
    display: grid;
    gap: 0.5rem;
}

.archive-thumb {
    display: block;
    width: 100%;
    aspect-ratio: 4 / 3;
    height: auto;
    object-fit: cover;
    object-position: center top;
    background: var(--surface-tint-2);
    border: 1px solid var(--rule);
    border-radius: var(--radius);
}

a.archive-thumb-link {
    display: block;
    overflow: hidden;
    border-radius: var(--radius);
}

a.archive-thumb-link:hover .archive-thumb {
    border-color: var(--brand-primary);
}

@media (max-width: 767.98px) {
    .archive-entry,
    .archive-entry--nomedia {
        grid-template-columns: minmax(0, 1fr);
        gap: 0.75rem;
    }

    .archive-entry__date {
        padding-top: 0;
    }

    .archive-entry__media {
        grid-template-columns: repeat(2, 1fr);
        max-width: 22rem;
    }
}

/* ------------------------------------------------------ compact digest --- */

.digest {
    margin: 0;
    padding: 0;
    list-style: none;
    border-top: 1px solid var(--rule);
}

.digest__item {
    display: grid;
    grid-template-columns: 7rem minmax(0, 1fr);
    gap: 1.25rem;
    padding: 0.9rem 0;
    border-bottom: 1px solid var(--rule);
    align-items: baseline;
}

.digest__date {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-muted);
    font-variant-numeric: tabular-nums;
}

.digest__title {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.45;
    color: var(--ink);
}

.digest__tag {
    font-family: var(--font-sans);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--brand-primary);
    display: block;
    margin-bottom: 0.15rem;
}

@media (max-width: 575.98px) {
    .digest__item {
        grid-template-columns: minmax(0, 1fr);
        gap: 0.35rem;
    }
}

/* ---------------------------------------------------------------- grid --- */

.grid {
    display: grid;
    gap: clamp(1.5rem, 2.5vw, 2.25rem);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (max-width: 991.98px) {
    .grid--3, .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 575.98px) {
    .grid--2, .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); }
}

/* ---------------------------------------------------------------- card --- */

.card-item {
    display: flex;
    flex-direction: column;
    height: 100%;
    background: var(--surface);
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.card-item:hover {
    border-color: var(--rule-strong);
    box-shadow: 0 10px 30px -18px rgba(11, 46, 63, 0.45);
}

.card-item__media {
    display: block;
    width: 100%;
    aspect-ratio: 3 / 2;
    height: auto;
    object-fit: cover;
    object-position: center top;
    background: var(--surface-tint-2);
    border-bottom: 1px solid var(--rule);
}

.card-item__body {
    padding: 1.35rem 1.4rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex: 1 1 auto;
}

.card-item__title {
    font-size: 1.08rem;
    line-height: 1.35;
    margin: 0;
}

.card-item__meta {
    margin: 0;
    font-size: 0.9rem;
    color: var(--ink-muted);
}

.card-item__foot {
    margin-top: auto;
    padding-top: 0.65rem;
}

/* research figure cards keep the full diagram visible (contain, not cover) */
.figure-card__media {
    width: 100%;
    aspect-ratio: 16 / 11;
    height: auto;
    object-fit: contain;
    background: var(--surface-tint);
    padding: 1rem;
    border-bottom: 1px solid var(--rule);
}

/* ------------------------------------------------------------- people ---- */

.person {
    text-align: center;
}

.person__photo {
    width: 100%;
    aspect-ratio: 4 / 5;
    height: auto;
    object-fit: cover;
    object-position: center 22%;
    background: var(--surface-tint-2);
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    display: block;
    margin-bottom: 1rem;
}

.person__name {
    font-size: 1.1rem;
    margin: 0 0 0.15rem;
}

.person__role {
    margin: 0;
    font-size: 0.9rem;
    color: var(--brand-primary);
    font-weight: 500;
}

.person__note {
    margin: 0.1rem 0 0;
    font-size: 0.85rem;
    color: var(--ink-muted);
}

.person__links {
    margin: 0.75rem 0 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem 0.9rem;
    justify-content: center;
}

/* principal-investigator feature card */
.pi {
    display: grid;
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    gap: clamp(1.75rem, 4vw, 3rem);
    align-items: start;
}

.pi__photo {
    width: 100%;
    aspect-ratio: 4 / 5;
    height: auto;
    object-fit: cover;
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    display: block;
}

.pi__name {
    font-size: clamp(1.5rem, 2.6vw, 2rem);
    margin: 0 0 0.35rem;
}

.pi__affil {
    margin: 0;
    color: var(--ink-soft);
}

@media (max-width: 767.98px) {
    .pi {
        grid-template-columns: minmax(0, 1fr);
    }

    .pi__photo {
        max-width: 18rem;
    }
}

/* CV / timeline list */
.timeline {
    margin: 0;
    padding: 0;
    list-style: none;
    border-top: 1px solid var(--rule);
}

.timeline li {
    display: grid;
    grid-template-columns: 9.5rem minmax(0, 1fr);
    gap: 1rem;
    padding: 0.55rem 0;
    border-bottom: 1px solid var(--rule);
    font-size: 0.925rem;
}

.timeline span:first-child {
    font-weight: 600;
    color: var(--ink);
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.02em;
}

@media (max-width: 575.98px) {
    .timeline li {
        grid-template-columns: minmax(0, 1fr);
        gap: 0.1rem;
    }
}

/* alumni / plain roster */
.roster {
    margin: 0;
    padding: 0;
    list-style: none;
}

.roster li {
    padding: 0.9rem 0;
    border-top: 1px solid var(--rule);
}

.roster--grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr));
    gap: 0 clamp(1.5rem, 3vw, 2.5rem);
}

.roster-group + .roster-group {
    margin-top: 2.75rem;
}

.roster strong {
    display: block;
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 600;
    color: var(--ink);
}

.roster span {
    font-size: 0.9rem;
    color: var(--ink-muted);
}

/* ------------------------------------------------------- publications ---- */

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

.pub {
    display: grid;
    grid-template-columns: 3.25rem minmax(0, 1fr);
    gap: 1.25rem;
    padding: 1.25rem 0;
    border-top: 1px solid var(--rule);
}

.pub__num {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 600;
    color: var(--ink-faint);
    font-variant-numeric: tabular-nums;
    padding-top: 0.1rem;
}

.pub__title {
    font-size: 1.1rem;
    line-height: 1.35;
    margin: 0 0 0.35rem;
}

.pub__authors {
    margin: 0;
    font-size: 0.925rem;
    color: var(--ink-soft);
}

.pub__authors em {
    font-style: normal;
    font-weight: 600;
    color: var(--ink);
}

.pub__venue {
    margin: 0.3rem 0 0;
    font-size: 0.925rem;
    color: var(--ink-muted);
}

.pub__foot {
    margin-top: 0.55rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 1.1rem;
}

.badge-status {
    display: inline-block;
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 0.3rem 0.55rem;
    border-radius: 2px;
    border: 1px solid var(--rule-strong);
    color: var(--ink-muted);
    background: var(--surface-tint);
}

.badge-status--published {
    color: var(--brand-secondary);
    border-color: rgba(11, 46, 63, 0.25);
    background: rgba(11, 46, 63, 0.06);
}

.badge-status--accepted {
    color: var(--brand-primary);
    border-color: rgba(66, 109, 140, 0.35);
    background: rgba(66, 109, 140, 0.08);
}

.pub-year {
    font-family: var(--font-sans);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--brand-primary);
    padding: 2rem 0 0.35rem;
    border-bottom: 2px solid var(--brand-secondary);
    margin-bottom: 0;
}

.pub-year:first-child {
    padding-top: 0;
}

@media (max-width: 575.98px) {
    .pub {
        grid-template-columns: 2.25rem minmax(0, 1fr);
        gap: 0.75rem;
    }
}

/* --------------------------------------------------------------- stats --- */

.stat-row {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1px;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius);
    overflow: hidden;
}

.stat {
    background: var(--brand-primary);
    padding: 1.5rem 1.25rem;
    text-align: center;
}

.stat__num {
    font-family: var(--font-serif);
    font-size: clamp(1.6rem, 3vw, 2.1rem);
    font-weight: 600;
    color: #fff;
    line-height: 1.1;
    display: block;
}

.stat__label {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.75);
    display: block;
    margin-top: 0.5rem;
}

@media (max-width: 767.98px) {
    .stat-row {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* ------------------------------------------------------- profile links --- */

.profile-links {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1px;
    background: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: var(--radius);
    overflow: hidden;
}

.profile-link {
    background: var(--brand-secondary);
    padding: 1.5rem 1.35rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    min-height: 7.5rem;
    justify-content: center;
    transition: background 0.15s ease;
}

.profile-link:hover {
    background: var(--brand-secondary-soft);
    text-decoration: none;
}

.profile-link__name {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 600;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.profile-link__name svg {
    width: 20px;
    height: 20px;
    flex: 0 0 auto;
}

.profile-link__meta {
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.6);
    word-break: break-word;
}

@media (max-width: 991.98px) {
    .profile-links {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 479.98px) {
    .profile-links {
        grid-template-columns: minmax(0, 1fr);
    }
}

/* --------------------------------------------------------- logo strip ---- */

.logo-strip {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: clamp(2rem, 5vw, 4rem);
}

.logo-strip img {
    height: 58px;
    width: auto;
    object-fit: contain;
    opacity: 0.85;
}

/* the principal funder sits on its own row, at a larger size */
.logo-strip--lead {
    margin-bottom: clamp(2rem, 4vw, 3rem);
}

.logo-strip--lead img {
    height: 104px;
    opacity: 1;
}

@media (max-width: 575.98px) {
    .logo-strip img {
        height: 42px;
    }

    .logo-strip--lead img {
        height: 68px;
    }
}

/* ------------------------------------------------------------ callout ---- */

.callout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: center;
}

.callout__title {
    font-size: clamp(1.5rem, 2.6vw, 2rem);
    margin: 0 0 0.75rem;
    color: #fff;
}

.callout__text {
    margin: 0;
    color: rgba(255, 255, 255, 0.85);
    max-width: 60ch;
}

.callout__text a {
    color: #fff;
    border-bottom: 1px solid rgba(255, 255, 255, 0.5);
}

.callout__text a:hover {
    text-decoration: none;
    border-bottom-color: #fff;
}

.status-pill {
    display: inline-block;
    margin-top: 1rem;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 0.4rem 0.7rem;
    border-radius: 2px;
    background: rgba(255, 255, 255, 0.16);
    color: #fff;
}

@media (max-width: 767.98px) {
    .callout {
        grid-template-columns: minmax(0, 1fr);
    }
}

/* ---------------------------------------------------------- collab list -- */

.collab-list {
    columns: 3;
    column-gap: clamp(1.5rem, 3vw, 2.5rem);
    margin: 0;
    padding: 0;
    list-style: none;
}

.collab-list li {
    break-inside: avoid;
    padding: 0.45rem 0;
    font-size: 0.925rem;
    color: rgba(255, 255, 255, 0.75);
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.collab-list strong {
    display: block;
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 600;
    color: #fff;
}

@media (max-width: 991.98px) { .collab-list { columns: 2; } }
@media (max-width: 575.98px) { .collab-list { columns: 1; } }

/* --------------------------------------------------------------- prose --- */

.prose p {
    font-size: clamp(1.02rem, 1.5vw, 1.15rem);
    line-height: 1.7;
    margin: 0 0 1.15rem;
}

.prose strong {
    color: var(--brand-primary);
    font-weight: 600;
}

/* -------------------------------------------------------------- footer --- */

.site-footer {
    background: var(--brand-secondary);
    color: rgba(255, 255, 255, 0.7);
    padding-top: var(--section-y);
    font-size: 0.925rem;
}

.site-footer a {
    color: rgba(255, 255, 255, 0.85);
}

.site-footer a:hover {
    color: #fff;
    text-decoration: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.6);
}

.footer-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.5rem);
    padding-bottom: var(--section-y);
}

.footer-logo {
    width: 100%;
    max-width: 30rem;
    height: auto;
    margin-bottom: 1.75rem;
}

.footer-title {
    font-family: var(--font-sans);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.5);
    margin: 0 0 1rem;
}

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

.footer-list li {
    padding: 0.28rem 0;
}

.footer-social {
    display: flex;
    gap: 0.5rem;
    margin-top: 1.25rem;
}

.footer-social a {
    width: 38px;
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: var(--radius);
    color: #fff;
}

.footer-social a:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.5);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.14);
    padding: 1.35rem 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
    justify-content: space-between;
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.55);
}

@media (max-width: 767.98px) {
    .footer-grid {
        grid-template-columns: minmax(0, 1fr);
    }
}

/* --------------------------------------------------------------- misc ---- */

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: #fff;
    color: var(--brand-secondary);
    padding: 0.75rem 1rem;
    z-index: 2000;
}

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

@media print {
    .site-nav, .filter-bar, .site-footer { display: none; }
}