:root {
  --ink: #1F2933;
  --warm-background: #F7F5F0;
  --accent-red: #B23A48;
  --research-blue: #2F5F8F;
  --technology-teal: #1F7A8C;
  --warm-orange: #E58F2A;
  --muted-green: #5E7D68;
  --light-gray: #D9DDE3;
  --paper: #FFFFFF;
  --muted-text: #5C6672;
  --line: rgba(31, 41, 51, 0.16);
  --shadow: 0 18px 44px rgba(31, 41, 51, 0.11);
  --radius: 8px;
  --max-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--warm-background);
  font-family: "Segoe UI", Arial, sans-serif;
  line-height: 1.6;
}

body.menu-open {
  overflow: hidden;
}

a {
  color: var(--research-blue);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid rgba(229, 143, 42, 0.72);
  outline-offset: 3px;
}

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

.container {
  width: min(var(--max-width), calc(100% - 40px));
  margin: 0 auto;
}

.narrow {
  width: min(860px, calc(100% - 40px));
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--line);
  background: rgba(247, 245, 240, 0.94);
  backdrop-filter: blur(14px);
}

.nav-wrap {
  width: min(var(--max-width), calc(100% - 32px));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: grid;
  gap: 2px;
  color: var(--ink);
  text-decoration: none;
}

.brand strong {
  font-size: 1rem;
}

.brand span {
  color: var(--muted-text);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.main-nav a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  border-radius: 6px;
  padding: 8px 11px;
  color: var(--muted-text);
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  background: rgba(47, 95, 143, 0.1);
  color: var(--research-blue);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
}

.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(247, 245, 240, 0.96), rgba(247, 245, 240, 0.78)),
    url("../images/profile-banner.svg") center right / cover no-repeat;
}

.hero-inner {
  min-height: min(720px, calc(100vh - 72px));
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.65fr);
  gap: 48px;
  align-items: center;
  padding: 76px 0 86px;
}

.hero-copy {
  max-width: 840px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-red);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.16;
}

h1 {
  max-width: 760px;
  color: var(--ink);
  font-size: clamp(2.6rem, 5.6vw, 5.4rem);
}

h2 {
  color: var(--research-blue);
  font-size: clamp(1.8rem, 3vw, 2.65rem);
}

h3 {
  color: var(--ink);
  font-size: 1.18rem;
}

.subtitle {
  margin: 16px 0 0;
  color: var(--research-blue);
  font-size: clamp(1.1rem, 2vw, 1.45rem);
  font-weight: 800;
}

.lead {
  margin: 22px 0 0;
  color: var(--muted-text);
  font-size: 1.08rem;
}

.hero-panel {
  display: grid;
  gap: 14px;
  align-self: stretch;
  align-content: center;
}

.signal {
  border-left: 4px solid var(--warm-orange);
  background: rgba(255, 255, 255, 0.76);
  padding: 16px 18px;
}

.signal strong {
  display: block;
  color: var(--ink);
  font-size: 1.05rem;
}

.signal span {
  color: var(--muted-text);
  font-size: 0.94rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.button {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 10px 16px;
  font-weight: 850;
  text-decoration: none;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  background: var(--accent-red);
  color: var(--paper);
}

.button.secondary {
  border-color: rgba(47, 95, 143, 0.35);
  background: rgba(255, 255, 255, 0.72);
  color: var(--research-blue);
}

.button.tertiary {
  border-color: rgba(31, 122, 140, 0.38);
  color: var(--technology-teal);
}

.button.small {
  min-height: 38px;
  padding: 8px 12px;
  font-size: 0.88rem;
}

.section {
  padding: 76px 0;
}

.section.white {
  background: var(--paper);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

.section-heading p,
.section .intro {
  max-width: 780px;
  color: var(--muted-text);
}

.grid {
  display: grid;
  gap: 18px;
}

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

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

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

.surface {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  padding: 22px;
}

.surface.accent {
  border-top: 4px solid var(--accent-red);
}

.surface.blue {
  border-top: 4px solid var(--research-blue);
}

.surface.teal {
  border-top: 4px solid var(--technology-teal);
}

.surface.green {
  border-top: 4px solid var(--muted-green);
}

.surface.orange {
  border-top: 4px solid var(--warm-orange);
}

.surface p,
.surface li,
.timeline p,
.publication p,
.project-card p {
  color: var(--muted-text);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.metric {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  padding: 18px;
}

.metric strong {
  display: block;
  color: var(--research-blue);
  font-size: 1.65rem;
}

.metric span {
  color: var(--muted-text);
  font-size: 0.9rem;
  font-weight: 700;
}

.lab-card {
  display: grid;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  padding: 22px;
}

.lab-card .lab-code {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 6px;
  background: rgba(31, 122, 140, 0.12);
  color: var(--technology-teal);
  font-weight: 900;
}

.project-card {
  display: flex;
  min-height: 100%;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.project-card:hover {
  box-shadow: var(--shadow);
}

.project-media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: #EDF0F3;
}

.project-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 14px;
  padding: 20px;
}

.project-meta,
.status-note {
  color: var(--muted-text);
  font-size: 0.84rem;
  font-weight: 750;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.tags span {
  border-radius: 999px;
  background: rgba(47, 95, 143, 0.09);
  padding: 5px 9px;
  color: var(--research-blue);
  font-size: 0.78rem;
  font-weight: 800;
}

.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}

.filters {
  display: grid;
  grid-template-columns: minmax(220px, 1.2fr) repeat(4, minmax(150px, 1fr));
  gap: 10px;
  margin: 22px 0 28px;
}

.filters input,
.filters select {
  min-height: 42px;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  padding: 8px 10px;
  color: var(--ink);
  font: inherit;
}

.empty-state {
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  padding: 18px;
  color: var(--muted-text);
  text-align: center;
}

.timeline {
  display: grid;
  gap: 16px;
}

.timeline article {
  border-left: 4px solid var(--light-gray);
  background: var(--paper);
  padding: 16px 18px;
}

.timeline article:nth-child(3n + 1) {
  border-color: var(--accent-red);
}

.timeline article:nth-child(3n + 2) {
  border-color: var(--technology-teal);
}

.timeline article:nth-child(3n + 3) {
  border-color: var(--warm-orange);
}

.publication-list {
  display: grid;
  gap: 14px;
}

.publication {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  padding: 18px;
}

.publication h3 {
  font-size: 1.05rem;
}

.list-clean {
  margin: 12px 0 0;
  padding-left: 18px;
}

.list-clean li {
  margin-bottom: 7px;
}

.cv-section {
  display: grid;
  gap: 18px;
}

.cv-row {
  display: grid;
  grid-template-columns: minmax(160px, 0.28fr) minmax(0, 1fr);
  gap: 18px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.contact-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.contact-list a {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  padding: 8px 12px;
  font-weight: 800;
  text-decoration: none;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--ink);
  color: var(--paper);
}

.footer-inner {
  min-height: 86px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-inner a {
  color: var(--paper);
  font-weight: 800;
  text-decoration: none;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 100;
  background: var(--ink);
  color: var(--paper);
  padding: 10px 14px;
}

.skip-link:focus {
  top: 14px;
}

@media (max-width: 1040px) {
  .hero-inner,
  .two,
  .three,
  .four,
  .metric-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 760px) {
  .nav-toggle {
    display: block;
  }

  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    border-bottom: 1px solid var(--line);
    background: var(--warm-background);
    padding: 12px 20px 18px;
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav a {
    min-height: 44px;
  }

  .hero-inner,
  .two,
  .three,
  .four,
  .metric-grid,
  .filters,
  .cv-row {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 56px 0;
  }

  .hero-inner {
    min-height: auto;
    padding: 60px 0 68px;
  }

  .section-heading {
    display: block;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    padding: 20px 0;
  }
}