:root {
  color-scheme: light;
  --bg: #f6f5f2;
  --surface: #ffffff;
  --text: #1b1c1f;
  --muted: #5c616a;
  --border: #d7dbe0;
  --shadow: 0 12px 28px rgba(22, 24, 28, 0.08);
  --accent: #2d333b;
  --card-radius: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #f2f1ed 0%, #f6f5f2 40%, #f1f1f3 100%);
  color: var(--text);
  line-height: 1.6;
}

body.theme-dark {
  color-scheme: dark;
  --bg: #121316;
  --surface: #181a1f;
  --text: #f3f4f6;
  --muted: #a7adb6;
  --border: #2a2f37;
  --shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
  --accent: #f0f2f5;
  background: radial-gradient(circle at top, #1b1e24 0%, #121316 60%);
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.site-header {
  position: sticky;
  top: 0;
  background: rgba(246, 245, 242, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

body.theme-dark .site-header {
  background: rgba(18, 19, 22, 0.92);
}

.nav {
  max-width: 980px;
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  font-weight: 600;
  letter-spacing: 0.02em;
}

.nav-links {
  display: none;
  gap: 18px;
  font-size: 0.95rem;
}

.nav-links a {
  color: var(--muted);
  position: relative;
}

.nav-links a.active {
  color: var(--text);
}

.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 1px;
  background: var(--text);
}

.theme-toggle {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 14px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.theme-toggle:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

main,
.footer {
  background: transparent;
}

.section {
  padding: 64px 20px;
}

.hero {
  padding-top: 80px;
}

.hero-image img {
  width: 100%;
  max-width: 360px;
  display: block;
  border-radius: 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  object-fit: cover;
  margin-bottom: 18px;
}

.content {
  max-width: 900px;
  margin: 0 auto;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 10px;
}

h1 {
  font-size: clamp(2.4rem, 4vw, 3.4rem);
  margin: 0 0 16px;
}

.tagline {
  max-width: 620px;
  font-size: 1.1rem;
  color: var(--muted);
  margin-bottom: 24px;
}

.socials {
  display: flex;
  gap: 12px;
  margin: 12px 0 14px;
  align-items: center;
  flex-wrap: wrap;
}

.social-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.social-icon svg {
  width: 18px;
  height: 18px;
  fill: var(--text);
}

.social-icon:hover,
.social-icon:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 0 0 2px rgba(45, 51, 59, 0.08), 0 0 12px rgba(45, 51, 59, 0.25);
  border-color: var(--accent);
}

.social-icon:hover svg {
  animation: iconPulse 1.4s ease-in-out infinite;
}

.contact-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  min-height: 36px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.95rem;
  transition: transform 0.2s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.contact-button:hover,
.contact-button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(22, 24, 28, 0.12);
  border-color: var(--accent);
}

.contact-button span {
  font-size: 0.95rem;
}

.hero-meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  color: var(--muted);
}

.hero-meta a {
  color: var(--text);
}

.dot {
  margin: 0 8px;
}

.section-heading {
  max-width: 900px;
  margin: 0 auto 24px;
}

.section-heading h2 {
  margin: 0 0 12px;
  font-size: 1.6rem;
}

.divider {
  height: 1px;
  background: var(--border);
}

.project-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--card-radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.project-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.project-link:hover,
.project-link:focus-visible {
  text-decoration: none;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 34px rgba(22, 24, 28, 0.12);
}

.project-card img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  display: block;
}

.card-body {
  padding: 20px;
}

.card-body h3 {
  margin: 0 0 12px;
  font-size: 1.15rem;
}

.card-body p {
  margin: 0 0 14px;
  color: var(--muted);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.tags span {
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 0.78rem;
  color: var(--muted);
}

.card-links {
  display: flex;
  gap: 16px;
  font-size: 0.9rem;
  color: var(--muted);
}

.publication {
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.publication h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.publication p {
  margin: 0 0 10px;
  color: var(--muted);
}

.gallery-grid {
  column-count: 1;
  column-gap: 20px;
}

.gallery-grid figure {
  margin: 0;
  width: 100%;
  break-inside: avoid;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

.gallery-grid img {
  width: 100%;
  height: auto;
  object-fit: contain;
  display: block;
  background: #f2f2f2;
}

.gallery-grid figcaption {
  padding: 12px 14px;
  font-size: 0.9rem;
  color: var(--muted);
}

.timeline,
.awards {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}

.timeline li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
}

.timeline .role {
  font-weight: 600;
}

.timeline .org,
.timeline .date {
  color: var(--muted);
  font-size: 0.9rem;
}

.awards li {
  padding: 12px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
}

.award-item {
  display: grid;
  gap: 12px;
  align-items: center;
}

.award-item p {
  margin: 0 0 6px;
}

.award-item a {
  color: var(--muted);
}

.award-item img {
  width: 100%;
  max-width: 360px;
  border-radius: 12px;
  border: 1px solid var(--border);
  display: block;
}

.footer {
  padding-bottom: 80px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--muted);
}

.footer-note {
  margin-top: 20px;
  color: var(--muted);
}

@media (min-width: 860px) {
  .nav-links {
    display: flex;
  }

  .hero-meta {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 16px;
  }

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

  .gallery-grid {
    column-count: 2;
  }

  .timeline li {
    grid-template-columns: 2fr 1fr 1fr;
    align-items: center;
  }

  .award-item {
    grid-template-columns: 1.2fr 0.8fr;
    justify-content: space-between;
  }
}

.gallery-grid figure.narrow {
  width: 88%;
  margin-left: auto;
  margin-right: auto;
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto;
    transition: none !important;
  }
}

@keyframes iconPulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.08);
  }
}