:root {
  color-scheme: dark;
  --bg: #07111f;
  --surface: rgba(255, 255, 255, 0.06);
  --surface-strong: rgba(255, 255, 255, 0.1);
  --text: #f5f7fb;
  --muted: #93a1b7;
  --accent: #6ee7b7;
  --accent-strong: #4ade80;
  --border: rgba(255, 255, 255, 0.12);
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  background:
    radial-gradient(circle at top left, rgba(110, 231, 183, 0.18), transparent 32%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
}

img {
  max-width: 100%;
}

.site-shell {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1rem 0 2rem;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0 1.5rem;
}

.brand {
  text-decoration: none;
  color: var(--text);
  font-weight: 800;
  letter-spacing: 0.2em;
  font-size: 1.1rem;
}

.nav-links {
  display: flex;
  gap: 1.25rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  transition: color 180ms ease;
}

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

.menu-toggle {
  display: none;
  background: transparent;
  border: 0;
  padding: 0.25rem;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  margin: 4px 0;
  background: var(--text);
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: center;
  padding: 3.5rem 0 2rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.25em;
  font-size: 0.78rem;
  color: var(--accent);
  font-weight: 700;
  margin: 0 0 0.6rem;
}

h1,
h2,
h3 {
  line-height: 1.1;
  margin: 0;
}

h1 {
  font-size: clamp(2.2rem, 3.5vw, 3.8rem);
  margin-bottom: 1rem;
}

.lead {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 650px;
  margin-bottom: 1.5rem;
}

.hero-actions {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.8rem 1.15rem;
  text-decoration: none;
  font-weight: 600;
  transition: transform 180ms ease, background 180ms ease;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #02110b;
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

.hero-panel {
  display: flex;
  justify-content: flex-end;
}

.panel-card,
.card,
.project-card,
.contact-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.panel-card {
  padding: 1.4rem;
  width: min(100%, 360px);
}

.panel-label {
  margin: 0 0 0.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.panel-card ul {
  margin: 0.8rem 0 0;
  padding-left: 1rem;
  color: var(--muted);
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.5rem 0 2rem;
}

.stats article {
  padding: 1rem 1.2rem;
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
}

.stats strong {
  display: block;
  font-size: 1.35rem;
  margin-bottom: 0.2rem;
}

.stats span {
  color: var(--muted);
  font-size: 0.95rem;
}

.section {
  padding: 2rem 0;
}

.section-heading {
  margin-bottom: 1rem;
}

.section-heading h2 {
  font-size: clamp(1.5rem, 2.1vw, 2rem);
}

.about-grid {
  display: grid;
  gap: 1.5rem;
  align-items: start;
  margin-bottom: 1.75rem;
}

.about-grid p {
  color: var(--muted);
  margin: 0;
  max-width: 760px;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.skill-category h4 {
  margin: 0 0 0.6rem;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent);
  font-weight: 700;
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.pill-list span {
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 0.55rem 0.75rem;
  border-radius: 999px;
  color: var(--text);
  font-size: 0.92rem;
}

.card-list,
.project-grid {
  display: grid;
  gap: 1.25rem;
}

.card-list {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: start;
}

.project-grid {
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  align-items: start;
}

.card,
.project-card {
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
}

.card-meta {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 0.45rem;
}

.card-company {
  margin: 0.15rem 0 0 !important;
  color: var(--text) !important;
  font-weight: 600;
}

.card p,
.project-card p,
.contact-card p {
  margin: 0.6rem 0 0;
  color: var(--muted);
}

.card ul,
.project-card ul {
  margin: 0.75rem 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.card ul li,
.project-card ul li {
  font-size: 0.95rem;
}

.project-card .pill-list {
  margin-top: 1rem;
}

.project-card .pill-list span {
  font-size: 0.82rem;
  padding: 0.4rem 0.65rem;
}

.research-grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.project-card a,
.contact-links a {
  display: inline-block;
  margin-top: 0.8rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.contact-section {
  padding-bottom: 0.5rem;
}

.contact-card {
  padding: 1.35rem;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer {
  padding: 2rem 0 1rem;
  color: var(--muted);
  font-size: 0.95rem;
  text-align: center;
}

@media (max-width: 860px) {
  .hero,
  .about-grid,
  .card-list,
  .project-grid {
    grid-template-columns: 1fr;
  }

  .hero-panel {
    justify-content: flex-start;
  }

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

@media (max-width: 640px) {
  .topbar {
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .menu-toggle {
    display: block;
    margin-left: auto;
  }

  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    padding-top: 0.3rem;
  }

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

  .hero {
    padding-top: 2rem;
  }
}