/* ============================================================
   VARIABLES
   ============================================================ */
:root {
  /* Colours */
  --clr-navy:         #1a1e3a;
  --clr-charcoal:     #2d2d3a;
  --clr-accent:       #d4613a;
  --clr-accent-light: #f5e1d3;
  --clr-bg:           #f8f7f4;
  --clr-bg-alt:       #f0ede7;
  --clr-white:        #ffffff;
  --clr-text:         #1a1e3a;
  --clr-text-muted:   #6b6a7a;
  --clr-border:       #e2dfd9;

  /* Typography */
  --ff-display: 'Fraunces', Georgia, serif;
  --ff-body:    'DM Sans', system-ui, -apple-system, sans-serif;

  --fw-thin:     200;
  --fw-light:    300;
  --fw-regular:  400;
  --fw-medium:   500;
  --fw-semibold: 600;
  --fw-bold:     700;

  --fs-xs:   0.75rem;
  --fs-sm:   0.875rem;
  --fs-base: 1rem;
  --fs-lg:   1.125rem;
  --fs-xl:   1.25rem;
  --fs-2xl:  1.5rem;
  --fs-3xl:  1.875rem;
  --fs-4xl:  2.25rem;
  --fs-5xl:  3rem;
  --fs-6xl:  4rem;
  --fs-hero: clamp(3.5rem, 10vw, 7rem);

  --lh-tight:   1.1;
  --lh-snug:    1.3;
  --lh-normal:  1.6;
  --lh-relaxed: 1.8;

  --ls-tight:  -0.025em;
  --ls-normal:  0;
  --ls-wide:    0.05em;
  --ls-wider:   0.1em;

  /* Spacing */
  --sp-1:  0.25rem;
  --sp-2:  0.5rem;
  --sp-3:  0.75rem;
  --sp-4:  1rem;
  --sp-5:  1.25rem;
  --sp-6:  1.5rem;
  --sp-8:  2rem;
  --sp-10: 2.5rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-20: 5rem;
  --sp-24: 6rem;

  /* Layout */
  --container-max: 1200px;
  --container-pad: clamp(1.25rem, 4vw, 2.5rem);
  --header-h:      4.5rem;

  /* Misc */
  --radius-sm: 3px;
  --radius-md: 6px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 4px rgba(26, 30, 58, 0.08);
  --shadow-md: 0 4px 20px rgba(26, 30, 58, 0.12);
  --transition:      200ms ease;
  --transition-slow: 400ms ease;
}

/* ============================================================
   RESET
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--ff-body);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--clr-text);
  background-color: var(--clr-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { display: block; max-width: 100%; }
a        { color: inherit; text-decoration: none; }
ul, ol   { list-style: none; }
button   { font: inherit; cursor: pointer; background: none; border: none; }

/* ============================================================
   BASE TYPOGRAPHY
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--ff-display);
  font-weight: var(--fw-regular);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  color: var(--clr-navy);
}

p {
  line-height: var(--lh-relaxed);
  color: var(--clr-charcoal);
}

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.site-main {
  padding-block-start: var(--header-h);
  min-height: calc(100vh - var(--header-h));
}

/* ============================================================
   HEADER & NAV
   ============================================================ */
.site-header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  height: var(--header-h);
  background: var(--clr-white);
  border-bottom: 1px solid var(--clr-border);
  z-index: 100;
  transition: box-shadow var(--transition);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-sm);
}

/* Container inside the header must fill the header height so that
   site-header__inner's height: 100% resolves correctly. */
.site-header .container {
  height: 100%;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.site-header__logo {
  font-family: var(--ff-display);
  font-size: var(--fs-xl);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-tight);
  color: var(--clr-navy);
  transition: opacity var(--transition);
}

.site-header__logo:hover {
  opacity: 0.65;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
}

.site-nav__link {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--clr-text-muted);
  position: relative;
  padding-block: var(--sp-1);
  transition: color var(--transition);
}

.site-nav__link::after {
  content: '';
  position: absolute;
  inset-block-end: -2px;
  inset-inline-start: 0;
  width: 0;
  height: 1.5px;
  background: var(--clr-accent);
  transition: width var(--transition);
}

.site-nav__link:hover,
.site-nav__link.is-active {
  color: var(--clr-navy);
}

.site-nav__link:hover::after,
.site-nav__link.is-active::after {
  width: 100%;
}

/* Hamburger */
.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  padding: 0;
  z-index: 110;
}

.site-header__toggle span {
  display: block;
  height: 2px;
  background: var(--clr-navy);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
  transform-origin: center;
}

.site-header__toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.site-header__toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.site-header__toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ============================================================
   PAGE HERO (interior pages)
   ============================================================ */
.page-hero {
  padding-block: var(--sp-20) var(--sp-16);
  border-bottom: 1px solid var(--clr-border);
}

.page-hero__eyebrow {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-block-end: var(--sp-5);
}

.page-hero__eyebrow::before {
  content: '';
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--clr-accent);
  flex-shrink: 0;
}

.page-hero__title {
  font-size: clamp(var(--fs-4xl), 7vw, var(--fs-6xl));
  font-weight: var(--fw-light);
  letter-spacing: var(--ls-tight);
  line-height: var(--lh-tight);
  color: var(--clr-navy);
  max-width: 22ch;
}

.page-hero__desc {
  margin-block-start: var(--sp-6);
  font-size: var(--fs-lg);
  color: var(--clr-text-muted);
  max-width: 55ch;
  line-height: var(--lh-snug);
}

/* ============================================================
   SECTION ELEMENTS
   ============================================================ */
.section-label {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-block-end: var(--sp-4);
}

.section-label::before {
  content: '';
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--clr-accent);
  flex-shrink: 0;
}

.section-title {
  font-size: clamp(var(--fs-2xl), 4vw, var(--fs-4xl));
  font-weight: var(--fw-light);
  letter-spacing: var(--ls-tight);
  margin-block-end: var(--sp-8);
}

.section-divider {
  border: none;
  border-top: 1px solid var(--clr-border);
  margin-block: var(--sp-20);
}

/* ============================================================
   CARDS
   ============================================================ */
.card {
  background: var(--clr-white);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: var(--sp-6);
  transition: box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-6);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--clr-navy);
  color: var(--clr-white);
  border: 1.5px solid var(--clr-navy);
}

.btn--primary:hover {
  background: var(--clr-accent);
  border-color: var(--clr-accent);
}

.btn--outline {
  background: transparent;
  color: var(--clr-navy);
  border: 1.5px solid var(--clr-navy);
}

.btn--outline:hover {
  background: var(--clr-navy);
  color: var(--clr-white);
}

/* ============================================================
   PLACEHOLDER BLOCKS
   ============================================================ */
.ph-block {
  background: var(--clr-bg-alt);
  border: 1px dashed var(--clr-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-text-muted);
  font-size: var(--fs-sm);
  font-style: italic;
}

/* ============================================================
   HOME — HERO
   ============================================================ */
.home-hero {
  padding-block-start: clamp(var(--sp-16), 16vh, var(--sp-24));
  padding-block-end: clamp(var(--sp-12), 10vh, var(--sp-20));
  position: relative;
  overflow: hidden;
}

.home-hero__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--sp-16);
  align-items: center;
  width: 100%;
}

.home-hero__content {
  max-width: 700px;
}

.home-hero__eyebrow {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-block-end: var(--sp-6);
}

.home-hero__eyebrow::before {
  content: '';
  display: block;
  width: 32px;
  height: 1.5px;
  background: var(--clr-accent);
  flex-shrink: 0;
}

.home-hero__name {
  font-size: var(--fs-hero);
  font-weight: var(--fw-light);
  letter-spacing: -0.035em;
  line-height: 0.93;
  color: var(--clr-navy);
  margin-block-end: var(--sp-8);
}

.home-hero__tagline {
  font-size: var(--fs-xl);
  line-height: var(--lh-snug);
  color: var(--clr-text-muted);
  max-width: 44ch;
  margin-block-end: var(--sp-10);
  font-weight: var(--fw-regular);
}

.home-hero__actions {
  display: flex;
  gap: var(--sp-4);
  flex-wrap: wrap;
}

.home-hero__photo {
  width: clamp(200px, 25vw, 360px);
  aspect-ratio: 3 / 4;
  border-radius: var(--radius-lg);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--clr-bg-alt);
}

.home-hero__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

/* ============================================================
   HOME — CONTENT SECTIONS
   ============================================================ */
.home-section {
  padding-block: var(--sp-20);
  border-top: 1px solid var(--clr-border);
}

.home-section__footer {
  margin-block-start: var(--sp-8);
}

/* ============================================================
   HOME — STATS STRIP
   ============================================================ */
.home-stats {
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
  padding-block: var(--sp-8);
}

.home-stats__inner {
  display: flex;
  gap: var(--sp-10);
  flex-wrap: wrap;
  align-items: center;
}

.home-stats__item {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.home-stats__number {
  font-family: var(--ff-display);
  font-size: var(--fs-3xl);
  font-weight: var(--fw-light);
  letter-spacing: var(--ls-tight);
  line-height: 1;
  color: var(--clr-navy);
}

.home-stats__item--venues .home-stats__number {
  font-family: var(--ff-body);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  color: var(--clr-text-muted);
}

.home-stats__label {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--clr-text-muted);
}

.home-stats__divider {
  width: 1px;
  height: 2.5rem;
  background: var(--clr-border);
  flex-shrink: 0;
}

/* ============================================================
   RESEARCH CARDS
   ============================================================ */

/* Image thumbnail variant — removes card padding so image bleeds to edges */
.card--image {
  padding: 0;
  overflow: hidden;
}

.card--image .research-card {
  padding: var(--sp-6);
}

.research-card__thumbnail {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  flex-shrink: 0;
}

.research-card__thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-slow);
}

.card--image:hover .research-card__thumbnail img {
  transform: scale(1.03);
}

.research-card {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.research-card__number {
  font-family: var(--ff-display);
  font-size: var(--fs-4xl);
  font-weight: var(--fw-thin);
  color: var(--clr-accent-light);
  line-height: 1;
  letter-spacing: var(--ls-tight);
}

.research-card__title {
  font-family: var(--ff-display);
  font-size: var(--fs-xl);
  font-weight: var(--fw-regular);
  color: var(--clr-navy);
  line-height: var(--lh-snug);
  letter-spacing: var(--ls-tight);
}

.research-card__desc {
  font-size: var(--fs-base);
  color: var(--clr-text-muted);
  line-height: var(--lh-relaxed);
  flex: 1;
}

.research-card__link {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--clr-accent);
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  margin-block-start: var(--sp-2);
  transition: gap var(--transition);
}

.research-card__link:hover {
  gap: var(--sp-4);
}

/* ============================================================
   PUBLICATION ITEMS
   ============================================================ */
.pub-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0 var(--sp-6);
  padding-block: var(--sp-5);
  border-bottom: 1px solid var(--clr-border);
}

.pub-item:last-child {
  border-bottom: none;
}

.pub-item__year {
  font-family: var(--ff-display);
  font-size: var(--fs-sm);
  font-weight: var(--fw-light);
  color: var(--clr-border);
  line-height: var(--lh-tight);
  padding-block-start: 0.2em;
  min-width: 3rem;
  letter-spacing: var(--ls-tight);
}

.pub-item__body {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.pub-item__venue {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--clr-accent);
}

.pub-item__title {
  font-family: var(--ff-display);
  font-size: var(--fs-lg);
  font-weight: var(--fw-regular);
  color: var(--clr-navy);
  line-height: var(--lh-snug);
  letter-spacing: var(--ls-tight);
  transition: color var(--transition);
}

.pub-item__title:hover {
  color: var(--clr-accent);
}

.pub-item__authors {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  line-height: var(--lh-normal);
}

/* ============================================================
   RESEARCH GRID
   ============================================================ */
.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  gap: var(--sp-5);
}

/* ============================================================
   PUBLICATIONS
   ============================================================ */

/* Two-column layout: sidebar + publication list */
.pub-layout {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 0 var(--sp-12);
  align-items: start;
  padding-block-start: var(--sp-10);
}

.pub-sidebar {
  position: sticky;
  top: calc(var(--header-h) + var(--sp-8));
}

.pub-filters {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.pub-filter-label {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--clr-text-muted);
  margin-block-end: var(--sp-3);
}

.pub-filter-btn {
  font-size: var(--fs-sm);
  font-weight: var(--fw-regular);
  text-align: left;
  padding: var(--sp-2) var(--sp-3);
  border: none;
  border-radius: var(--radius-sm);
  color: var(--clr-text-muted);
  background: transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.pub-filter-btn:hover {
  background: var(--clr-bg-alt);
  color: var(--clr-text);
}

.pub-filter-btn.is-active {
  background: var(--clr-navy);
  color: var(--clr-white);
}

@media (max-width: 700px) {
  .pub-layout {
    grid-template-columns: 1fr;
    padding-block-start: var(--sp-6);
  }
  .pub-sidebar {
    position: static;
  }
  .pub-filters {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--sp-2);
    padding-block-end: var(--sp-6);
    border-bottom: 1px solid var(--clr-border);
  }
  .pub-filter-btn {
    padding: var(--sp-2) var(--sp-4);
    border: 1px solid var(--clr-border);
    border-radius: 100px;
    background: var(--clr-white);
  }
  .pub-filter-btn:hover {
    background: var(--clr-bg-alt);
    border-color: var(--clr-text-muted);
  }
  .pub-filter-btn.is-active {
    background: var(--clr-navy);
    border-color: var(--clr-navy);
    color: var(--clr-white);
  }
}

.pub-year-group {
  padding-block: var(--sp-8);
  border-bottom: 1px solid var(--clr-border);
}

.pub-year-group:last-child {
  border-bottom: none;
}

.pub-year-heading {
  font-family: var(--ff-display);
  font-size: var(--fs-3xl);
  font-weight: var(--fw-thin);
  letter-spacing: var(--ls-tight);
  color: var(--clr-border);
  margin-block-end: var(--sp-6);
  line-height: 1;
}

.pub-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

/* ── Publication item — meta row (venue + type + award badge) */
.pub-item__meta {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-wrap: wrap;
}

/* "Journal" type indicator */
.pub-item__type-badge {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--clr-text-muted);
  padding: 0.1em var(--sp-2);
  border: 1px solid var(--clr-border);
  border-radius: 2px;
}

/* Award badges */
.pub-item__badge {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  padding: 0.1em var(--sp-2);
  border-radius: 2px;
  white-space: nowrap;
}

.pub-item__badge--best {
  background: #fef3c7;
  color: #92400e;
}

.pub-item__badge--hm {
  background: #dbeafe;
  color: #1e40af;
}

/* In grouped year lists the year column is redundant — collapse it */
.pub-year-group .pub-item {
  grid-template-columns: 1fr;
}


/* ============================================================
   SUPERVISION / CONTACT
   ============================================================ */
.supervision-text {
  max-width: 640px;
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.supervision-text p {
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  color: var(--clr-text);
}

.supervision-subheading {
  font-family: var(--ff-body);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--clr-text-muted);
  padding-block-start: var(--sp-4);
}

.supervision-list {
  padding-inline-start: var(--sp-5);
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.supervision-list li {
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--clr-text);
}

/* Utility — used by JS filter logic */
.is-hidden {
  display: none !important;
}

/* ============================================================
   RESEARCH PAGE — PROJECTS
   ============================================================ */
.project-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
  max-width: 860px;
}

.project-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--sp-3) var(--sp-10);
  align-items: start;
  padding: var(--sp-6) var(--sp-6) var(--sp-6) var(--sp-8);
  background: var(--clr-white);
  border: 1px solid var(--clr-border);
  border-left: 3px solid var(--clr-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.project-item__title {
  font-family: var(--ff-display);
  font-size: var(--fs-xl);
  font-weight: var(--fw-regular);
  color: var(--clr-navy);
  letter-spacing: var(--ls-tight);
  line-height: var(--lh-snug);
  margin-block-end: var(--sp-3);
}

.project-item__desc {
  font-size: var(--fs-base);
  color: var(--clr-text-muted);
  line-height: var(--lh-relaxed);
  max-width: 60ch;
}

.project-item__meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--sp-1);
  flex-shrink: 0;
  padding-block-start: 0.15em;
}

.project-item__funder {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--clr-accent);
}

.project-item__amount {
  font-family: var(--ff-display);
  font-size: var(--fs-2xl);
  font-weight: var(--fw-light);
  color: var(--clr-navy);
  letter-spacing: var(--ls-tight);
  line-height: 1;
}

.project-item__year {
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-wide);
  color: var(--clr-text-muted);
}

@media (max-width: 600px) {
  .project-item {
    grid-template-columns: 1fr;
  }

  .project-item__meta {
    align-items: flex-start;
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--sp-3);
    padding-block-start: 0;
    border-top: 1px solid var(--clr-border);
    padding-block-start: var(--sp-4);
    margin-block-start: var(--sp-2);
  }
}

/* ============================================================
   RESEARCH PAGE — PHD STUDENTS
   ============================================================ */
.student-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 220px), 1fr));
  gap: var(--sp-4);
}

.student-card {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  padding: var(--sp-5);
  background: var(--clr-white);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
}

.student-card__name {
  font-family: var(--ff-display);
  font-size: var(--fs-lg);
  font-weight: var(--fw-regular);
  color: var(--clr-navy);
  letter-spacing: var(--ls-tight);
  line-height: var(--lh-snug);
}

.student-card__area {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  line-height: var(--lh-normal);
}

.student-card__badge {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  padding: 0.15em var(--sp-2);
  border-radius: 2px;
  background: var(--clr-bg-alt);
  color: var(--clr-text-muted);
  border: 1px solid var(--clr-border);
  align-self: flex-start;
}

.student-group-heading {
  font-family: var(--ff-body);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--clr-text-muted);
  margin-block: var(--sp-10) var(--sp-4);
  display: flex;
  align-items: center;
  gap: var(--sp-4);
}

.student-group-heading::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--clr-border);
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr));
  gap: var(--sp-5);
}

.contact-card {
  background: var(--clr-white);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: var(--sp-6);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  transition: box-shadow var(--transition), border-color var(--transition);
}

.contact-card:hover {
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.contact-card__label {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--clr-accent);
}

.contact-card__value {
  font-size: var(--fs-lg);
  font-weight: var(--fw-regular);
  color: var(--clr-navy);
  word-break: break-word;
}

.contact-card__link {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  transition: color var(--transition);
}

.contact-card__link:hover {
  color: var(--clr-accent);
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--clr-navy);
  color: rgba(255, 255, 255, 0.55);
  padding-block: var(--sp-12) var(--sp-8);
  margin-block-start: var(--sp-24);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--sp-8);
  align-items: start;
}

.site-footer__name {
  font-family: var(--ff-display);
  font-size: var(--fs-xl);
  font-weight: var(--fw-semibold);
  color: var(--clr-white);
  letter-spacing: var(--ls-tight);
  line-height: var(--lh-tight);
  margin-block-end: var(--sp-2);
}

.site-footer__role {
  font-size: var(--fs-sm);
  opacity: 0.7;
}

.site-footer__nav {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  align-items: flex-end;
}

.site-footer__nav a {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  opacity: 0.55;
  transition: opacity var(--transition);
}

.site-footer__nav a:hover {
  opacity: 1;
}

.site-footer__bottom {
  grid-column: 1 / -1;
  margin-block-start: var(--sp-8);
  padding-block-start: var(--sp-6);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: var(--fs-xs);
  display: flex;
  justify-content: space-between;
  gap: var(--sp-4);
  flex-wrap: wrap;
  opacity: 0.5;
}

/* ============================================================
   BIO PAGE — LAYOUT
   ============================================================ */
.bio-lead {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: var(--sp-16);
  align-items: start;
}

.bio-text {
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
}

.bio-text p {
  font-size: var(--fs-lg);
  line-height: var(--lh-relaxed);
}

.bio-text p:first-child {
  font-size: var(--fs-xl);
  line-height: 1.7;
  color: var(--clr-navy);
  font-weight: var(--fw-regular);
}

.bio-photo {
  width: 100%;
  aspect-ratio: 3 / 4;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--clr-bg-alt);
}

.bio-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

/* ── Credential cards ─────────────────────────── */
.credential-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
}

.credential-card {
  border-left: 2px solid var(--clr-accent);
  padding-inline-start: var(--sp-5);
  padding-block: var(--sp-2);
}

.credential-card__institution {
  font-family: var(--ff-display);
  font-size: var(--fs-xl);
  font-weight: var(--fw-regular);
  color: var(--clr-navy);
  letter-spacing: var(--ls-tight);
  line-height: var(--lh-snug);
  margin-block-end: var(--sp-1);
}

.credential-card__role {
  font-size: var(--fs-base);
  font-weight: var(--fw-medium);
  color: var(--clr-charcoal);
  margin-block-end: var(--sp-1);
}

.credential-card__detail {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  line-height: var(--lh-normal);
}

/* ── Awards list ──────────────────────────────── */
.awards-list {
  display: flex;
  flex-direction: column;
  max-width: 720px;
}

.award-item {
  display: grid;
  grid-template-columns: 6rem 1fr;
  gap: 0 var(--sp-6);
  padding-block: var(--sp-4);
  border-bottom: 1px solid var(--clr-border);
}

.award-item:last-child {
  border-bottom: none;
}

.award-item__venue {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--clr-accent);
  padding-block-start: 0.2em;
}

.award-item__body {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.award-item__title {
  font-family: var(--ff-display);
  font-size: var(--fs-lg);
  font-weight: var(--fw-regular);
  color: var(--clr-navy);
  letter-spacing: var(--ls-tight);
  line-height: var(--lh-snug);
}

.award-item__detail {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
}

/* ── Media cards ──────────────────────────────── */
.media-card {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.media-card__outlet {
  font-family: var(--ff-display);
  font-size: var(--fs-2xl);
  font-weight: var(--fw-light);
  color: var(--clr-navy);
  letter-spacing: var(--ls-tight);
  line-height: var(--lh-tight);
}

.media-card__desc {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  line-height: var(--lh-relaxed);
  flex: 1;
}

/* ── Bio responsive ───────────────────────────── */
@media (max-width: 860px) {
  .bio-lead {
    grid-template-columns: 1fr;
  }

  .bio-photo {
    width: min(280px, 60vw);
    aspect-ratio: 1 / 1;
    border-radius: 50%;
  }
}

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

.anim-fade-up {
  animation: fadeUp 0.55s ease forwards;
  opacity: 0;
}

.anim-fade-up:nth-child(1) { animation-delay: 0.05s; }
.anim-fade-up:nth-child(2) { animation-delay: 0.15s; }
.anim-fade-up:nth-child(3) { animation-delay: 0.25s; }
.anim-fade-up:nth-child(4) { animation-delay: 0.35s; }
.anim-fade-up:nth-child(5) { animation-delay: 0.45s; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .home-hero__inner {
    grid-template-columns: 1fr;
  }

  .home-hero__photo {
    display: none;
  }
}

@media (max-width: 768px) {
  .site-header__toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    inset-block-start: var(--header-h);
    inset-inline: 0;
    inset-block-end: 0;
    background: var(--clr-white);
    padding: var(--sp-10) var(--container-pad);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    overflow-y: auto;
    z-index: 99;
  }

  .site-nav.is-open {
    transform: translateX(0);
  }

  .site-nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-6);
  }

  .site-nav__link {
    font-family: var(--ff-display);
    font-size: var(--fs-3xl);
    font-weight: var(--fw-light);
    letter-spacing: var(--ls-tight);
    text-transform: none;
    color: var(--clr-navy);
  }

  .site-nav__link::after {
    display: none;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
  }

  .site-footer__nav {
    align-items: flex-start;
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--sp-4);
  }
}

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