:root {
  --bg: #0f172a;
  --bg-soft: #172033;
  --card: rgba(255, 255, 255, 0.08);
  --card-strong: rgba(255, 255, 255, 0.12);
  --text: #f8fafc;
  --muted: #cbd5e1;
  --accent: #38bdf8;
  --accent-strong: #0ea5e9;
  --ring: rgba(56, 189, 248, 0.35);
  --border: rgba(255, 255, 255, 0.12);
  --shadow: 0 24px 70px rgba(2, 6, 23, 0.45);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.24), transparent 32rem),
    radial-gradient(circle at 80% 20%, rgba(129, 140, 248, 0.2), transparent 28rem),
    var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
}

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

code {
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background: rgba(15, 23, 42, 0.72);
  color: #bae6fd;
  padding: 0.1rem 0.35rem;
}

.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;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.82);
  backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1rem 0;
}

.logo {
  display: inline-grid;
  width: 2.75rem;
  height: 2.75rem;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: linear-gradient(135deg, var(--accent), #818cf8);
  color: #07111f;
  font-weight: 800;
  text-decoration: none;
  box-shadow: 0 10px 30px rgba(56, 189, 248, 0.25);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-links a {
  color: var(--muted);
  font-weight: 600;
  text-decoration: none;
  transition:
    color 160ms ease,
    transform 160ms ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--text);
}

.menu-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--border);
  border-radius: 0.9rem;
  background: var(--card);
  color: var(--text);
  cursor: pointer;
}

.menu-toggle span:not(.sr-only) {
  display: block;
  width: 1.25rem;
  height: 2px;
  margin: 0.22rem auto;
  border-radius: 99px;
  background: currentColor;
}

.section {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 5.5rem 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: center;
  min-height: calc(100vh - 5rem);
}

.hero-content {
  max-width: 64rem;
}

.eyebrow {
  margin: 0 0 0.8rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 13ch;
  margin-bottom: 1.2rem;
  font-size: clamp(3.5rem, 10vw, 6.8rem);
  line-height: 0.92;
  letter-spacing: -0.08em;
}

.typewriter-line {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  min-height: 3rem;
  margin: 0 0 0.55rem;
  border: 1px solid rgba(56, 189, 248, 0.55);
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.16), rgba(129, 140, 248, 0.12));
  color: var(--muted);
  font: inherit;
  font-size: clamp(1rem, 2vw, 1.18rem);
  font-weight: 700;
  padding: 0.65rem 1rem;
  cursor: pointer;
  transition:
    background 180ms ease,
    border-color 180ms ease,
    transform 180ms ease;
}

.typewriter-line strong {
  min-width: 13.5rem;
  color: #e0f2fe;
  font-weight: 800;
  text-align: left;
  text-shadow: 0 0 28px rgba(56, 189, 248, 0.35);
}

.typewriter-label {
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.52);
  color: #bae6fd;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 0.28rem 0.55rem;
  text-transform: uppercase;
}

.typewriter-line:hover,
.typewriter-line:focus-visible {
  border-color: var(--ring);
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.22), rgba(129, 140, 248, 0.18));
  transform: translateY(-2px);
}

.typewriter-cursor {
  width: 0.18rem;
  height: 1.55rem;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 18px rgba(56, 189, 248, 0.75);
  animation: blink 900ms steps(2, start) infinite;
}

.typewriter-hint {
  max-width: 32rem;
  margin-bottom: 1.35rem;
  color: var(--muted);
  font-size: 0.95rem;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

h2 {
  margin-bottom: 0.75rem;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1;
  letter-spacing: -0.05em;
}

h3 {
  margin-bottom: 0.55rem;
  font-size: 1.25rem;
  line-height: 1.2;
}

.hero-summary,
.section-heading p,
.section-copy,
.contact-section p,
.card p,
.detail-list,
.timeline-item p {
  color: var(--muted);
}

.hero-summary {
  max-width: 44rem;
  margin-bottom: 2rem;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.hero-actions,
.social-links,
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.button,
.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
  transition:
    background 180ms ease,
    border-color 180ms ease,
    transform 180ms ease;
}

.button {
  padding: 0.8rem 1.2rem;
}

.button.primary {
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent), #818cf8);
  color: #07111f;
}

.button:hover,
.button:focus-visible,
.social-link:hover,
.social-link:focus-visible {
  border-color: var(--ring);
  background: var(--card-strong);
  transform: translateY(-2px);
}

.button.primary:hover,
.button.primary:focus-visible {
  background: linear-gradient(135deg, #7dd3fc, #a5b4fc);
}

.card,
.feature-panel,
.mini-card,
.timeline-item,
.contact-section {
  border: 1px solid var(--border);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.05));
  box-shadow: var(--shadow);
}

.social-link {
  width: 2.75rem;
  height: 2.75rem;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(12rem, 0.75fr) minmax(0, 1.25fr);
  gap: 2rem;
  align-items: start;
}

.section-copy {
  max-width: 44rem;
  font-size: 1.1rem;
}

.section-heading {
  max-width: 42rem;
  margin-bottom: 2rem;
}

.feature-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 1rem;
  border-radius: calc(var(--radius) + 8px);
  padding: 1rem;
}

.feature-main {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.18), transparent 16rem),
    rgba(15, 23, 42, 0.34);
  padding: 1.5rem;
}

.feature-main p:not(.card-meta),
.mini-card p {
  color: var(--muted);
}

.feature-main .button {
  margin-top: auto;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.mini-card {
  border-radius: var(--radius);
  padding: 1.1rem;
}

.mini-card p {
  margin-bottom: 0;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  border-radius: var(--radius);
  padding: 1.35rem;
}

.card p {
  margin-bottom: 1.25rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: auto;
  padding: 0;
  list-style: none;
}

.tag {
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.09);
  color: #bae6fd;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.25rem 0.55rem;
}

.timeline {
  display: grid;
  gap: 1rem;
}

.timeline-item {
  position: relative;
  border-radius: var(--radius);
  padding: 1.35rem 1.35rem 1.35rem 3.25rem;
}

.timeline-item::before {
  content: "";
  position: absolute;
  top: 1.5rem;
  left: 1.35rem;
  width: 0.75rem;
  height: 0.75rem;
  border: 3px solid var(--accent);
  border-radius: 999px;
  background: var(--bg);
  box-shadow: 0 0 0 0.4rem rgba(56, 189, 248, 0.12);
}

.timeline-meta {
  margin-bottom: 0.4rem;
  color: var(--accent);
  font-size: 0.88rem;
  font-weight: 800;
}

.card-meta {
  margin-bottom: 0.45rem;
  color: var(--accent);
  font-size: 0.86rem;
  font-weight: 800;
}

.detail-list {
  display: grid;
  gap: 0.55rem;
  margin: 0;
  padding-left: 1.1rem;
}

.detail-list li::marker {
  color: var(--accent);
}

.publication-card .button,
.project-card .button {
  align-self: flex-start;
  margin-top: auto;
}

.contact-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  border-radius: calc(var(--radius) + 8px);
  padding: 2rem;
}

.site-footer {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  border-top: 1px solid var(--border);
  color: var(--muted);
  padding: 2rem 0 3rem;
  text-align: center;
}

@media (max-width: 860px) {
  .menu-toggle {
    display: inline-block;
  }

  .nav-links {
    position: absolute;
    top: calc(100% + 1px);
    right: 1rem;
    left: 1rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    border: 1px solid var(--border);
    border-radius: 1rem;
    background: rgba(15, 23, 42, 0.96);
    padding: 0.8rem;
    box-shadow: var(--shadow);
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links a {
    display: block;
    padding: 0.75rem;
  }

  .hero,
  .split-section,
  .feature-panel,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 4rem;
  }

  .card-grid {
    grid-template-columns: 1fr 1fr;
  }

  .contact-section {
    display: grid;
  }

  .feature-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .section {
    padding: 4rem 0;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .contact-links .button,
  .hero-actions .button {
    width: 100%;
  }

  .typewriter-line {
    width: 100%;
    justify-content: center;
  }

  .typewriter-line strong {
    min-width: auto;
  }

  .typewriter-hint {
    text-align: center;
  }
}