:root {
    /* Foster School of Medicine official palette */
    --ttu-red: #CC0000;
    --ttu-red-dark: #99281E;
    --ttu-black: #000000;
    --ttu-cream: #EAE0C6;
    --ttu-tan: #C4A97C;
    --ttu-blue: #003A66;
    --ttu-blue-soft: #899FB4;
    --ttu-green-dark: #4D5B2A;
    --ttu-green: #B0B37B;
    --ttu-gray: #333333;
    --ttu-gray-light: #CCCCCC;

    /* Semantic mappings */
    --ink: #1a1a1a;
    --ink-soft: #595959;        /* WCAG AA 7:1 contrast on white */
    --paper: #FFFFFF;            /* pure white per IT spec */
    --paper-warm: #FFFFFF;       /* pure white per IT spec */
    --rule: #C4A97C;             /* official TTU tan as rule color */
    --rule-soft: #d9c9a6;
    --accent: #CC0000;           /* TTU Red — official primary */
    --accent-deep: #99281E;      /* TTU Dark Red */
    --gold: #8B6A2A;             /* darker bronze for in-progress (WCAG AA 4.5:1 on white) */
    --green: #4D5B2A;            /* TTU Dark Green for completed */
    --slate: #003A66;            /* TTU Dark Blue for planned */
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: #FFFFFF;
    color: var(--ink);
    line-height: 1.55;
    font-size: 15px;
    min-height: 100vh;
  }
  a { color: inherit; text-decoration: none; }
  button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

  /* WCAG 2.1 AA — visible focus indicators on all interactive elements.
     2px solid TTU red ring with 2px offset, meets 3:1 contrast against white. */
  *:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
    border-radius: 2px;
  }

  /* Skip-to-content link for keyboard / screen reader users (WCAG 2.4.1) */
  .sarp-skip-link {
    position: absolute;
    left: -9999px;
    top: auto;
    width: 1px;
    height: 1px;
    overflow: hidden;
    background: var(--accent);
    color: #FFFFFF;
    padding: 12px 20px;
    font-weight: 600;
    z-index: 1000;
    text-decoration: underline;
  }
  .sarp-skip-link:focus,
  .sarp-skip-link:focus-visible {
    position: fixed;
    left: 16px;
    top: 16px;
    width: auto;
    height: auto;
    overflow: visible;
    z-index: 10000;
  }

  /* Visually-hidden but available to screen readers (WCAG 1.3.1) */
  .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }

  /* Red bar at very top — TTUHSC signature */
  .top-band {
    background: var(--accent);
    height: 6px;
    width: 100%;
  }

  .masthead {
    border-bottom: 2px double var(--ttu-black);
    padding: 22px 40px 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    background: #FFFFFF;
    position: sticky; top: 0; z-index: 50;
  }
  .masthead-brand {
    display: flex;
    align-items: center;
    gap: 26px;
    flex: 1 1 auto;
    min-width: 0;
  }
  .masthead-text {
    min-width: 0;
  }
  .masthead-text .kicker {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.22em;
    color: var(--accent);
    font-weight: 700;
    margin-bottom: 4px;
  }
  .masthead-text h1 {
    font-family: 'Fraunces', serif;
    font-weight: 500;
    font-size: 28px;
    letter-spacing: -0.01em;
    color: var(--ttu-black);
    line-height: 1.05;
    font-variation-settings: "opsz" 144;
  }
  .masthead-text h1 em {
    font-style: italic;
    color: var(--accent);
  }
  .masthead-right {
    font-family: 'Fraunces', serif;
    font-style: italic;
    font-size: 13px;
    color: var(--ink-soft);
    text-align: right;
    flex-shrink: 0;
  }
  .masthead-right .vol {
    display: block;
    font-style: normal;
    font-variant-caps: small-caps;
    letter-spacing: 0.12em;
    font-size: 10px;
    color: var(--accent-deep);
    text-transform: lowercase;
    margin-top: 2px;
    font-weight: 700;
  }

  .control-bar {
    background: #FFFFFF;
    border-bottom: 1px solid var(--rule);
    padding: 18px 40px;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 20px;
    align-items: center;
    position: sticky; top: 116px; z-index: 49;
  }
  .search-wrap {
    position: relative;
  }
  .search-wrap::before {
    content: '\2315';
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--ink-soft);
    font-size: 18px;
    pointer-events: none;
  }
  #searchInput {
    width: 100%;
    padding: 12px 16px 12px 40px;
    border: 1px solid #767676;  /* WCAG 1.4.11 — 3:1 contrast against white for form controls */
    background: #FFFFFF;
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    color: var(--ink);
    border-radius: 0;
    transition: border-color 0.15s;
  }
  #searchInput:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
    border-color: var(--ink);
  }
  #searchInput::placeholder {
    color: #595959;  /* WCAG AA — 7:1 contrast on white */
    font-style: italic;
  }
  .nav-tabs {
    display: flex;
    gap: 4px;
  }
  .nav-tab {
    padding: 8px 16px;
    border: 1px solid transparent;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #595959;  /* WCAG AA 7:1 contrast on white */
    background: #FFFFFF;
    transition: all 0.15s;
    border-radius: 0;
  }
  .nav-tab:hover { color: var(--ink); border-color: var(--rule-soft); }
  .nav-tab.active {
    color: var(--ink);
    border-color: var(--ink);
    background: #FFFFFF;
  }
  .nav-tab[aria-current="page"] {
    color: var(--ink);
    border-color: var(--ink);
  }

  .main {
    max-width: 1320px;
    margin: 0 auto;
    padding: 40px 0;
  }

  .hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    margin-bottom: 48px;
    border-top: 1px solid var(--rule);
    border-bottom: 1px solid var(--rule);
  }
  .stat {
    padding: 24px 20px;
    text-align: center;
    border-right: 1px solid var(--rule);
  }
  .stat:last-child { border-right: none; }
  .stat-num {
    font-family: 'Fraunces', serif;
    font-weight: 400;
    font-size: 44px;
    color: var(--ink);
    line-height: 1;
    font-variation-settings: "opsz" 144;
  }
  .stat-label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--ink-soft);
    margin-top: 6px;
    font-weight: 500;
  }

  .section-head {
    border-bottom: 2px solid var(--accent);
    padding-bottom: 8px;
    margin-bottom: 24px;
    margin-top: 56px;
    display: flex;
    align-items: baseline;
    justify-content: space-between;
  }
  .section-head h2 {
    font-family: 'Fraunces', serif;
    font-weight: 500;
    font-size: 26px;
    color: var(--ttu-black);
    font-variation-settings: "opsz" 144;
  }
  .section-head .meta {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--ink-soft);
    font-weight: 500;
  }

  .topic-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 32px;
  }
  .topic-chip {
    font-size: 11px;
    padding: 5px 12px;
    border: 1px solid var(--rule);
    background: #FFFFFF;
    color: var(--ink-soft);
    transition: all 0.12s;
    border-radius: 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
  }
  .topic-chip:hover { color: var(--ink); border-color: var(--ink); background: #F7F2E5; }
  .topic-chip.active {
    background: var(--ink);
    color: #FFFFFF;
    border-color: var(--ink);
  }

  .dept-block { margin-bottom: 48px; }
  .dept-header {
    display: flex;
    align-items: baseline;
    gap: 16px;
    border-bottom: 1px solid var(--rule);
    padding-bottom: 6px;
    margin-bottom: 14px;
  }
  .dept-header h3 {
    font-family: 'Fraunces', serif;
    font-weight: 500;
    font-size: 20px;
    color: var(--ink);
    font-variation-settings: "opsz" 144;
  }
  .dept-header .count {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--ink-soft);
    font-weight: 500;
  }

  .mentor-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 0;
    border-left: 1px solid var(--rule-soft);
    border-top: 1px solid var(--rule-soft);
  }
  .mentor-row {
    padding: 14px 18px;
    border-right: 1px solid var(--rule-soft);
    border-bottom: 1px solid var(--rule-soft);
    cursor: pointer;
    transition: background 0.12s;
    background: var(--paper);
  }
  .mentor-row:hover {
    background: var(--paper-warm);
  }
  .mentor-name {
    font-family: 'Fraunces', serif;
    font-weight: 500;
    font-size: 17px;
    color: var(--ink);
    margin-bottom: 4px;
    line-height: 1.2;
    font-variation-settings: "opsz" 24;
  }
  .mentor-row:hover .mentor-name {
    color: var(--accent-deep);
  }
  .mentor-meta {
    font-size: 11px;
    color: var(--ink-soft);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
  }
  .mentor-meta .pcount {
    font-family: 'Fraunces', serif;
    font-weight: 600;
    font-size: 12px;
    color: var(--ink);
    text-transform: none;
    letter-spacing: 0;
  }
  .mentor-meta .dot {
    width: 3px; height: 3px; border-radius: 50%;
    background: var(--rule);
  }
  .mentor-row .topics-mini {
    margin-top: 8px;
    font-size: 10px;
    color: var(--ink-soft);
    font-style: italic;
  }
  .verify-flag {
    display: inline-block;
    font-size: 9px;
    padding: 1px 5px;
    background: var(--ttu-blue);
    color: white;
    margin-left: 6px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 600;
    vertical-align: middle;
  }

  /* Availability badges on mentor cards (Browse, Topics, search results) */
  .avail-pill {
    display: inline-block;
    font-size: 9px;
    padding: 1px 6px;
    margin-left: 6px;
    text-transform: uppercase;
    letter-spacing: 0.10em;
    font-weight: 600;
    vertical-align: middle;
    border: 1px solid;
  }
  .avail-pill.yes {
    background: #E8EFD8;
    color: var(--ttu-green-dark);
    border-color: var(--ttu-green-dark);
  }
  .avail-pill.no {
    background: #F5E4E2;
    color: var(--ttu-red);
    border-color: var(--ttu-red);
  }

  /* Availability banner on the profile page */
  .avail-banner {
    margin: 20px 0 24px;
    padding: 14px 18px;
    font-family: 'Fraunces', serif;
    font-size: 14px;
    line-height: 1.5;
    border-left: 4px solid;
  }
  .avail-banner.yes {
    background: #F2F6EA;
    border-color: var(--ttu-green-dark);
    color: var(--ink);
  }
  .avail-banner.yes .avail-banner-label {
    color: var(--ttu-green-dark);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: 11px;
    font-family: 'Inter', sans-serif;
    font-style: normal;
    display: block;
    margin-bottom: 2px;
  }
  .avail-banner.no {
    background: #FBF1EF;
    border-color: var(--ttu-red);
    color: var(--ink);
  }
  .avail-banner.no .avail-banner-label {
    color: var(--ttu-red);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: 11px;
    font-family: 'Inter', sans-serif;
    font-style: normal;
    display: block;
    margin-bottom: 4px;
  }

  .profile {
    max-width: 920px;
    margin: 0 auto;
  }
  .profile-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--ink-soft);
    margin-bottom: 24px;
    padding: 6px 0;
    font-weight: 500;
  }
  .profile-back:hover { color: var(--accent-deep); }
  .profile-header {
    border-top: 3px double var(--accent);
    border-bottom: 1px solid var(--ttu-black);
    padding: 24px 0;
    margin-bottom: 32px;
  }
  .profile-kicker {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.22em;
    color: var(--accent);
    font-weight: 700;
    margin-bottom: 8px;
  }
  .profile-name {
    font-family: 'Fraunces', serif;
    font-weight: 400;
    font-size: 44px;
    line-height: 1.05;
    margin-bottom: 12px;
    color: var(--ttu-black);
    font-variation-settings: "opsz" 144;
    letter-spacing: -0.015em;
  }
  .profile-title {
    font-family: 'Fraunces', serif;
    font-style: italic;
    font-size: 17px;
    color: var(--ink-soft);
    margin-bottom: 16px;
    line-height: 1.4;
  }
  .profile-contact {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    font-size: 12px;
    color: var(--ink-soft);
  }
  .profile-contact .label {
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 10px;
    color: var(--ink-soft);
    margin-right: 6px;
    font-weight: 600;
  }
  .profile-contact a {
    color: var(--accent-deep);
    border-bottom: 1px solid var(--rule);
  }
  .profile-contact a:hover { border-color: var(--accent-deep); }

  .profile-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    margin-bottom: 40px;
    border-top: 1px solid var(--rule);
    border-bottom: 1px solid var(--rule);
  }
  .profile-grid > div {
    padding: 18px 20px;
    border-right: 1px solid var(--rule);
  }
  .profile-grid > div:last-child { border-right: none; }
  .profile-grid h4 {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--ink-soft);
    margin-bottom: 8px;
    font-weight: 600;
  }
  .profile-grid .stat-line {
    font-family: 'Fraunces', serif;
    font-weight: 400;
    font-size: 22px;
    color: var(--ink);
  }
  .tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: 6px;
  }
  .tag {
    font-size: 10px;
    padding: 3px 8px;
    background: #F7F2E5;
    border: 1px solid var(--rule);
    color: var(--ink);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.12s;
  }
  .tag:hover, .tag:focus-visible {
    background: var(--ink);
    color: #FFFFFF;
    border-color: var(--ink);
  }
  .tag.research-type {
    background: var(--ink);
    color: #FFFFFF;
    border-color: var(--ink);
  }

  .projects-section h3 {
    font-family: 'Fraunces', serif;
    font-weight: 400;
    font-size: 22px;
    margin-bottom: 16px;
    color: var(--ink);
    border-bottom: 1px solid var(--ink);
    padding-bottom: 6px;
  }
  .year-block { margin-bottom: 32px; }
  .year-label {
    font-family: 'Fraunces', serif;
    font-style: italic;
    font-weight: 500;
    font-size: 14px;
    color: var(--accent-deep);
    margin-bottom: 10px;
    text-transform: lowercase;
    letter-spacing: 0.05em;
  }
  .project {
    padding: 14px 0;
    border-bottom: 1px dotted var(--rule);
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 16px;
  }
  .project:last-child { border-bottom: none; }
  .status-badge {
    font-size: 9px;
    padding: 3px 6px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 700;
    color: white;
    text-align: center;
    height: fit-content;
    align-self: start;
    width: 100%;
  }
  .status-Completed { background: var(--ttu-green-dark); }
  .status-In-Progress { background: #8B6A2A; }    /* deeper bronze for contrast */
  .status-Planned { background: var(--ttu-blue); }
  .project-content {
    font-size: 13px;
    color: var(--ink);
  }
  .project-title {
    font-family: 'Fraunces', serif;
    font-weight: 500;
    font-size: 15px;
    margin-bottom: 4px;
    line-height: 1.3;
    color: var(--ink);
  }
  .project-meta {
    font-size: 11px;
    color: var(--ink-soft);
    margin-top: 4px;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    text-transform: uppercase;
    letter-spacing: 0.05em;
  }
  .project-meta .student {
    font-style: italic;
    text-transform: none;
    letter-spacing: 0;
  }
  .project-topics {
    margin-top: 6px;
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
  }

  .empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--ink-soft);
    font-style: italic;
    font-family: 'Fraunces', serif;
    font-size: 17px;
  }

  .bio-note {
    background: #F7F2E5;
    border-left: 3px solid var(--accent);
    padding: 14px 18px;
    margin-bottom: 24px;
    font-style: italic;
    font-family: 'Fraunces', serif;
    font-size: 14px;
    color: var(--ink-soft);
  }

  .intro-blurb {
    font-family: 'Fraunces', serif;
    font-style: italic;
    color: var(--ink-soft);
    margin-bottom: 24px;
    font-size: 15px;
    line-height: 1.6;
  }

  /* SITE FOOTER */
  .site-footer {
    border-top: 2px double var(--ttu-black);
    margin-top: 80px;
    padding: 28px 40px 40px;
    background: #F7F2E5;
    text-align: center;
  }
  .site-footer .footer-divider {
    width: 60px;
    height: 1px;
    background: var(--accent);
    margin: 0 auto 18px;
  }
  .site-footer .footer-credit {
    font-family: 'Fraunces', serif;
    font-size: 14px;
    color: var(--ink);
    line-height: 1.5;
  }
  .site-footer .footer-credit .name {
    font-weight: 600;
    color: var(--ttu-black);
  }
  .site-footer .footer-credit .title {
    font-style: italic;
    color: var(--ink-soft);
    font-size: 13px;
    display: block;
    margin-top: 2px;
  }
  .site-footer .footer-meta {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--ink-soft);
    margin-top: 14px;
    font-weight: 500;
  }

  /* TOPICS INDEX (wiki-style A-Z) */
  .topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 0;
    border-left: 1px solid var(--rule-soft);
    border-top: 1px solid var(--rule-soft);
  }
  .topic-card {
    padding: 16px 18px;
    border-right: 1px solid var(--rule-soft);
    border-bottom: 1px solid var(--rule-soft);
    cursor: pointer;
    transition: background 0.12s;
    background: var(--paper);
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
  }
  .topic-card:hover, .topic-card:focus-visible {
    background: #F7F2E5;
  }
  .topic-card .topic-name {
    font-family: 'Fraunces', serif;
    font-weight: 500;
    font-size: 16px;
    color: var(--ttu-black);
    line-height: 1.25;
    font-variation-settings: "opsz" 24;
  }
  .topic-card:hover .topic-name {
    color: var(--accent-deep);
  }
  .topic-card .topic-counts {
    font-size: 11px;
    color: var(--ink-soft);
    text-align: right;
    flex-shrink: 0;
  }
  .topic-card .topic-counts .num {
    font-family: 'Fraunces', serif;
    font-size: 18px;
    color: var(--ttu-black);
    font-weight: 500;
    display: block;
    line-height: 1;
  }
  .topic-card .topic-counts .lbl {
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--ink-soft);
  }

  /* TOPIC DETAIL PAGE (wiki-like article) */
  .topic-page {
/*     max-width: 1080px; */
/*     margin: 0 auto; */
  }
  .topic-page-header {
    border-top: 3px double var(--accent);
    border-bottom: 1px solid var(--ttu-black);
    padding: 24px 0;
    margin-bottom: 32px;
  }
  .topic-page-kicker {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.22em;
    color: var(--accent);
    font-weight: 700;
    margin-bottom: 8px;
  }
  .topic-page-name {
    font-family: 'Fraunces', serif;
    font-weight: 400;
    font-size: 44px;
    line-height: 1.05;
    color: var(--ttu-black);
    font-variation-settings: "opsz" 144;
    letter-spacing: -0.015em;
    margin-bottom: 12px;
  }
  .topic-page-summary {
    font-family: 'Fraunces', serif;
    font-style: italic;
    font-size: 16px;
    color: var(--ink-soft);
    line-height: 1.5;
  }

  /* Subgroup heading for Internal / External / etc within a topic */
  .topic-subgroup {
    margin-bottom: 40px;
  }
  .topic-subgroup-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    border-bottom: 1px solid var(--rule);
    padding-bottom: 6px;
    margin-bottom: 14px;
  }
  .topic-subgroup-head h3 {
    font-family: 'Fraunces', serif;
    font-weight: 500;
    font-size: 19px;
    color: var(--ttu-black);
    font-variation-settings: "opsz" 144;
  }
  .topic-subgroup-head .count {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--ink-soft);
    font-weight: 500;
  }

  /* Recent projects list inside topic page */
  .topic-projects-section {
    margin-top: 48px;
  }
  .topic-projects-section h3 {
    font-family: 'Fraunces', serif;
    font-weight: 400;
    font-size: 22px;
    margin-bottom: 16px;
    color: var(--ttu-black);
    border-bottom: 1px solid var(--ttu-black);
    padding-bottom: 6px;
  }
  .topic-project {
    padding: 14px 0;
    border-bottom: 1px dotted var(--rule);
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 16px;
  }
  .topic-project .by-mentor {
    font-size: 11px;
    color: var(--accent-deep);
    margin-top: 4px;
    font-weight: 500;
    cursor: pointer;
  }
  .topic-project .by-mentor:hover {
    text-decoration: underline;
  }

  /* Letter divider for A-Z index */
  .letter-divider {
    font-family: 'Fraunces', serif;
    font-weight: 500;
    font-size: 13px;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    border-bottom: 1px solid var(--rule);
    padding-bottom: 4px;
    margin: 28px 0 10px;
  }
  .letter-divider:first-child { margin-top: 0; }

  /* MOBILE & TABLET */
  @media (max-width: 768px) {
    /* Disable sticky positioning entirely on mobile to prevent overlap issues.
       The page is short enough that scrolling to nav/search isn't a problem. */
    .masthead {
      position: static;
      padding: 14px 16px 12px;
      flex-direction: column;
      align-items: flex-start;
      gap: 10px;
    }
    .masthead-brand {
      gap: 14px;
      width: 100%;
    }
    .masthead-text h1 {
      font-size: 22px;
    }
    .masthead-text .kicker {
      font-size: 9px;
      letter-spacing: 0.18em;
    }
    .masthead-right {
      text-align: left;
      font-size: 11px;
    }
    .masthead-right .vol {
      font-size: 9px;
    }

    .control-bar {
      position: static;
      padding: 12px 16px;
      grid-template-columns: 1fr;
      gap: 10px;
    }

    /* Nav tabs scroll horizontally as a single row on mobile */
    .nav-tabs {
      display: flex;
      overflow-x: auto;
      padding-bottom: 4px;
      gap: 2px;
      -webkit-overflow-scrolling: touch;
    }
    .nav-tab {
      flex-shrink: 0;
      padding: 8px 12px;
      font-size: 11px;
    }

    #searchInput {
      font-size: 16px; /* prevents iOS zoom on focus */
    }

    .main {
      padding: 20px 16px;
    }

    .section-head {
      flex-direction: column;
      align-items: flex-start;
      gap: 4px;
      margin-top: 36px;
    }
    .section-head h2 {
      font-size: 22px;
    }

    .hero-stats {
      grid-template-columns: repeat(2, 1fr);
    }
    .stat {
      padding: 18px 14px;
      border-bottom: 1px solid var(--rule);
    }
    .stat-num { font-size: 32px; }
    .stat:nth-child(odd) { border-right: 1px solid var(--rule); }
    .stat:nth-child(even) { border-right: none; }
    .stat:nth-child(3), .stat:nth-child(4) { border-bottom: none; }

    .topic-filters {
      gap: 4px;
    }
    .topic-chip {
      font-size: 10px;
      padding: 4px 9px;
    }

    .mentor-list,
    .topics-grid {
      grid-template-columns: 1fr;
    }

    .dept-header {
      flex-direction: column;
      align-items: flex-start;
      gap: 2px;
    }
    .dept-header h3 {
      font-size: 17px;
    }

    .topic-card {
      flex-wrap: wrap;
    }

    .profile {
      max-width: 100%;
    }
    .profile-name { font-size: 28px; }
    .profile-title { font-size: 15px; }
    .profile-grid { grid-template-columns: 1fr; }
    .profile-grid > div { border-right: none; border-bottom: 1px solid var(--rule); padding: 14px 16px; }
    .profile-grid > div:last-child { border-bottom: none; }

    .project,
    .topic-project {
      grid-template-columns: 60px 1fr;
      gap: 10px;
    }
    .project-title { font-size: 14px; }
    .status-badge { font-size: 8px; padding: 2px 4px; }

    .topic-page-name {
      font-size: 28px;
    }

    .topic-subgroup-head {
      flex-direction: column;
      align-items: flex-start;
      gap: 2px;
    }

    .site-footer {
      padding: 24px 20px 32px;
      margin-top: 48px;
    }
    .site-footer .footer-credit { font-size: 13px; }
    .site-footer .footer-credit .title { font-size: 11px; }
  }

  /* SMALL MOBILE (phones in portrait, < 480px) */
  @media (max-width: 480px) {
    .masthead-text h1 { font-size: 19px; }
    .stat-num { font-size: 26px; }
    .stat-label { font-size: 9px; letter-spacing: 0.14em; }
    .profile-name { font-size: 24px; }
    .topic-page-name { font-size: 24px; }
  }