:root {
  --font-base: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --shadow-sm: 0 10px 30px rgba(15, 23, 42, 0.12);
  --shadow-lg: 0 35px 80px rgba(15, 23, 42, 0.22);
  --transition-base: 180ms ease;
  --max-width: min(1080px, 92vw);

  --bg: #0b172a;
  --bg-muted: rgba(15, 23, 42, 0.72);
  --bg-elevated: rgba(15, 23, 42, 0.88);
  --surface: rgba(15, 23, 42, 0.6);
  --surface-border: rgba(148, 163, 184, 0.25);
  --text: #e2e8f0;
  --text-strong: #f8fafc;
  --text-muted: #94a3b8;
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.2);
  --accent-strong: #0ea5e9;
  --gradient: linear-gradient(140deg, rgba(14, 165, 233, 0.55), rgba(129, 140, 248, 0.35));
}

[data-theme="light"] {
  --bg: #f8fafc;
  --bg-muted: rgba(226, 232, 240, 0.75);
  --bg-elevated: rgba(248, 250, 252, 0.92);
  --surface: rgba(255, 255, 255, 0.92);
  --surface-border: rgba(15, 23, 42, 0.08);
  --text: #1f2937;
  --text-strong: #111827;
  --text-muted: #4b5563;
  --accent: #0ea5e9;
  --accent-soft: rgba(14, 165, 233, 0.18);
  --accent-strong: #2563eb;
  --gradient: linear-gradient(140deg, rgba(14, 165, 233, 0.25), rgba(129, 140, 248, 0.2));
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-family: var(--font-base);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: radial-gradient(130% 140% at 50% 10%, rgba(56, 189, 248, 0.18), rgba(15, 23, 42, 0));
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover,
a:focus-visible {
  color: var(--accent);
}

.site {
  margin: 0 auto;
  max-width: var(--max-width);
  padding: clamp(1.5rem, 3vw, 3rem) 0 4rem;
  display: grid;
  gap: clamp(2.5rem, 4vw, 3.5rem);
}

.noscript {
  background: #fcd34d;
  color: #1f2937;
  padding: 0.75rem 1rem;
  text-align: center;
  font-weight: 600;
}

.site-header {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: clamp(1rem, 3vw, 2rem);
  background: var(--bg-muted);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: clamp(1rem, 3vw, 1.5rem) clamp(1.25rem, 3vw, 2.25rem);
  backdrop-filter: blur(12px);
  position: sticky;
  top: clamp(0.5rem, 2vw, 1.5rem);
  z-index: 10;
}

.brand {
  display: grid;
  gap: 0.25rem;
}

.brand__title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  font-weight: 600;
}

.brand__subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.site-nav {
  display: flex;
  gap: clamp(0.75rem, 2vw, 1.5rem);
  justify-content: center;
  font-size: 0.95rem;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.75rem;
  position: relative;
  padding-bottom: 0.2rem;
}

.site-nav a.is-active {
  color: var(--accent);
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0%;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition-base);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after,
.site-nav a.is-active::after {
  width: 100%;
}

.theme-toggle {
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 50%;
  border: 1px solid var(--surface-border);
  background: var(--surface);
  color: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  transition: transform var(--transition-base), border-color var(--transition-base);
}

.theme-toggle:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.theme-toggle__icon {
  position: absolute;
  width: 1.2rem;
  height: 1.2rem;
  background-size: cover;
  background-repeat: no-repeat;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.theme-toggle__icon--sun {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='%23f59e0b' viewBox='0 0 24 24'%3E%3Cpath d='M12 18a6 6 0 110-12 6 6 0 010 12zm0-16a1 1 0 011 1v1a1 1 0 01-2 0V3a1 1 0 011-1zm0 18a1 1 0 011 1v1a1 1 0 01-2 0v-1a1 1 0 011-1zM4.22 5.64a1 1 0 011.42-1.42l.7.7a1 1 0 01-1.42 1.42l-.7-.7zM17.66 19.08a1 1 0 011.42-1.42l.7.7a1 1 0 01-1.42 1.42l-.7-.7zM1 12a1 1 0 011-1h1a1 1 0 010 2H2a1 1 0 01-1-1zm18-1h1a1 1 0 010 2h-1a1 1 0 010-2zM5.64 19.78a1 1 0 011.42 0l.7.7a1 1 0 01-1.42 1.42l-.7-.7a1 1 0 010-1.42zM18.36 4.22a1 1 0 011.42 0l.7.7a1 1 0 01-1.42 1.42l-.7-.7a1 1 0 010-1.42z'/%3E%3C/svg%3E");
}

.theme-toggle__icon--moon {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='%2338bdf8' viewBox='0 0 24 24'%3E%3Cpath d='M21 12.79A9 9 0 0111.21 3a7 7 0 109.79 9.79z'/%3E%3C/svg%3E");
}

[data-theme="light"] .theme-toggle__icon--sun,
[data-theme="dark"] .theme-toggle__icon--moon {
  opacity: 1;
}

.site-main {
  display: grid;
  gap: clamp(2rem, 3vw, 3rem);
}

.hero {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--surface-border);
  background: var(--bg-elevated);
  min-height: clamp(360px, 55vh, 500px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.hero.hero--has-media {
  grid-template-columns: minmax(0, 1fr) minmax(220px, 320px);
  gap: clamp(1.5rem, 3vw, 2.5rem);
  align-items: center;
}

.hero__background {
  position: absolute;
  inset: 0;
  background: radial-gradient(60% 60% at 70% 25%, rgba(56, 189, 248, 0.28), transparent 60%), var(--gradient);
  mix-blend-mode: screen;
  opacity: 0.85;
}

.hero__content {
  position: relative;
  padding: clamp(2rem, 5vw, 3.5rem);
  display: grid;
  gap: clamp(1rem, 2vw, 1.5rem);
  max-width: 680px;
}

.hero.hero--has-media .hero__content {
  padding-right: clamp(1rem, 2vw, 2rem);
}

.hero__pretitle {
  letter-spacing: 0.24em;
  text-transform: uppercase;
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 600;
  margin: 0;
}

.hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.35rem, 5vw, 3.4rem);
  color: var(--text-strong);
  line-height: 1.1;
}

.hero__summary {
  margin: 0;
  font-size: clamp(1rem, 2.4vw, 1.15rem);
  color: var(--text);
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.25rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.hero__meta-item,
.hero__meta-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--surface-border);
  transition: transform var(--transition-base), border-color var(--transition-base);
}

.hero__meta-item {
  cursor: default;
}

.hero__meta-link {
  cursor: pointer;
}

.hero__meta-link:hover,
.hero__meta-link:focus-visible,
.hero__meta-item:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero__media {
  display: none;
  position: relative;
  padding: clamp(1.5rem, 3vw, 2.2rem);
  align-self: center;
  justify-self: center;
  z-index: 1;
}

.hero.hero--has-media .hero__media {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__media picture {
  display: block;
  width: 100%;
}

.hero__media img {
  width: clamp(200px, 32vw, 320px);
  max-width: 100%;
  height: auto;
  border-radius: calc(var(--radius-lg) - 8px);
  box-shadow: 0 25px 60px rgba(15, 23, 42, 0.28);
  border: 1px solid rgba(148, 163, 184, 0.35);
  object-fit: cover;
}

.page-hero {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--surface-border);
  background: var(--bg-elevated);
  padding: clamp(2rem, 4vw, 3.25rem);
  display: grid;
  gap: clamp(1rem, 2vw, 1.5rem);
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(60% 60% at 80% 15%, rgba(56, 189, 248, 0.24), transparent 60%), var(--gradient);
  opacity: 0.65;
  pointer-events: none;
}

.page-hero > * {
  position: relative;
}

.page-hero__pretitle {
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 600;
  margin: 0;
}

.page-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.6rem);
  color: var(--text-strong);
  line-height: 1.1;
}

.page-hero__summary {
  margin: 0;
  font-size: clamp(1rem, 2.2vw, 1.1rem);
  color: var(--text);
  max-width: 72ch;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  background: var(--accent);
  color: #0b1120;
  box-shadow: var(--shadow-sm);
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.button--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--surface-border);
  box-shadow: none;
}

.section {
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  border: 1px solid var(--surface-border);
  padding: clamp(1.8rem, 3vw, 2.6rem);
  display: grid;
  gap: clamp(1.5rem, 2vw, 2rem);
}

.section__header {
  display: grid;
  gap: 0.6rem;
}

.section h2 {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 1.9rem);
  font-family: var(--font-display);
}

.section__lede {
  margin: 0;
  color: var(--text-muted);
  max-width: 72ch;
}

.section__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.card-grid {
  display: grid;
  gap: clamp(1rem, 2vw, 1.8rem);
}

.news-feed {
  display: grid;
  gap: clamp(1rem, 2vw, 1.4rem);
}

.news-item {
  border-radius: var(--radius-md);
  border: 1px solid var(--surface-border);
  background: var(--surface);
  padding: clamp(1.1rem, 2.4vw, 1.6rem);
  display: grid;
  gap: 0.4rem;
  transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.news-item:hover,
.news-item:focus-within {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}

.news-item__date {
  margin: 0;
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.news-item__title {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-strong);
}

.news-item__description {
  margin: 0;
  color: var(--text);
  font-size: 0.95rem;
}

.news-item__link {
  font-size: 0.9rem;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.news-item__link::after {
  content: "↗";
}

.card-grid--two {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  background: var(--surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--surface-border);
  padding: clamp(1.25rem, 2.5vw, 1.7rem);
  display: grid;
  gap: 0.85rem;
  transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover,
.card:focus-within {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
}

.card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.card__title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-strong);
}

.card__subtitle {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
}

.card__list {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.5rem;
  color: var(--text);
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.project-grid {
  display: grid;
  gap: clamp(1.25rem, 2.5vw, 2rem);
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.project-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--surface-border);
  background: var(--surface);
  overflow: hidden;
  display: grid;
  transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.project-card:hover,
.project-card:focus-within {
  border-color: var(--accent);
  transform: translateY(-6px);
  box-shadow: var(--shadow-sm);
}

.project-card__media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.2), rgba(59, 130, 246, 0.18));
}

.project-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-base);
}

.project-card:hover .project-card__media img {
  transform: scale(1.03);
}

.project-card__body {
  padding: clamp(1.3rem, 2.6vw, 1.8rem);
  display: grid;
  gap: 0.9rem;
}

.project-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.project-card__title {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-strong);
}

.project-card__summary {
  margin: 0;
  font-size: 1rem;
  color: var(--text);
}

.project-card__highlights {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.5rem;
  color: var(--text);
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.project-card__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.card-list {
  display: grid;
  gap: 1.1rem;
}

.publication-card {
  padding: clamp(1.1rem, 2.5vw, 1.5rem);
  border-radius: var(--radius-md);
  border: 1px solid var(--surface-border);
  background: var(--surface);
  display: grid;
  gap: 0.4rem;
  transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.publication-card:hover,
.publication-card:focus-within {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}

.publication-card__title {
  margin: 0;
  font-weight: 600;
  font-size: 1.05rem;
}

.publication-card__meta {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.publication-card__link {
  font-size: 0.85rem;
  color: var(--accent);
}

.publication-card__authors {
  font-size: 0.95rem;
  color: var(--text);
}

.publication-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.publication-card__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.publication-groups {
  display: grid;
  gap: clamp(2rem, 4vw, 2.8rem);
}

.publication-group {
  display: grid;
  gap: 1.25rem;
}

.publication-group__title {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--accent-strong);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.publication-grid {
  display: grid;
  gap: clamp(1rem, 2vw, 1.5rem);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.skill-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.skill-card {
  border-radius: var(--radius-md);
  border: 1px solid var(--surface-border);
  background: var(--surface);
  padding: clamp(1.1rem, 2.5vw, 1.5rem);
  display: grid;
  gap: 0.6rem;
}

.skill-card__title {
  margin: 0;
  font-weight: 600;
  font-size: 1rem;
  color: var(--accent-strong);
}

.skill-card__items {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.35rem;
  color: var(--text);
  font-size: 0.95rem;
}

.site-footer {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  padding-bottom: 1rem;
}

.site-footer__links {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.bounce-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.bounce-link::after {
  content: "↗";
  font-size: 0.9em;
  transition: transform var(--transition-base);
}

.bounce-link:hover::after,
.bounce-link:focus-visible::after {
  transform: translate(2px, -3px);
}

@media (max-width: 960px) {
  .site-header {
    grid-template-columns: 1fr;
    gap: 1rem;
    align-items: start;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .site-footer {
    text-align: left;
  }
}

@media (max-width: 680px) {
  .site {
    gap: 2.25rem;
    padding: 1.5rem 0 3rem;
  }

  .site-header {
    position: static;
  }

  .hero {
    min-height: auto;
  }

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

  .hero.hero--has-media {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero.hero--has-media .hero__media {
    justify-content: center;
    padding-top: 0;
  }

  .hero__media img {
    width: clamp(200px, 70vw, 260px);
  }

  .hero__meta-link {
    width: 100%;
  }

  .card-grid {
    gap: 1rem;
  }
}