:root {
  --bg-dark: #0d1117;
  --bg-card: #161b22;
  --accent: #58a6ff;
  --text-main: #e6edf3;
  --text-muted: #8b949e;
  --radius: 1rem;
  --transition: 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  min-height: 100vh;
  font-family: "Inter", "Segoe UI", Roboto, sans-serif;
  background: var(--bg-dark);
  color: var(--text-main);
  overflow-x: hidden;
  overflow-y: auto;
}

html::-webkit-scrollbar,
body::-webkit-scrollbar {
  display: none;
}

html, body {
  scrollbar-width: none;
  -ms-overflow-style: none;
}

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

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

.container {
  width: 90%;
  max-width: 1200px;
  margin: auto;
  position: relative;
  z-index: 1;
}

header {
  position: relative;
  height: 50vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
}

header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(13, 17, 23, 0.35);
  z-index: 1;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 0;
  z-index: 2;
  position: relative;
}

.brand {
  display: flex;
  flex-direction: column;
}

.logo {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
}

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

.role-cycler {
  margin-top: 0.5rem;
  font-size: 1.2rem;
  font-weight: 500;
  color: #c9d1d9;
  min-height: 1.5em;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-weight: 500;
  transition: color var(--transition), text-shadow var(--transition);
}

.nav-links a:hover {
  text-shadow: 0 0 6px var(--accent);
  color: var(--accent);
}

#wavefield {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  display: block;
  pointer-events: none;
}

main section {
  padding: 5rem 0;
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

main section.visible {
  opacity: 1;
  transform: translateY(0);
}

h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--accent);
}

.t-t-grid,
.spoken-grid,
.programming-grid,
.project-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 1rem;
}

.spoken-grid {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.programming-grid {
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.t-t-grid,
.project-grid {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  transition: transform var(--transition);
  text-align: center;
  padding: 1.5rem;
}

.card:hover {
  transform: translateY(-6px) scale(1.02);
}

.card-top {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
}

.card-bottom {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.3;
}

.lang-logo {
  width: 48px;
  height: 48px;
  filter: invert(38%) sepia(85%) saturate(600%) hue-rotate(180deg);
}

.card-top a {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  text-decoration: none;
}

.card-top a:hover .lang-logo {
  transform: scale(1.1);
  transition: transform var(--transition);
}

.project-grid .card {
  padding: 2rem;
}

.project-grid .card h3 {
  margin-bottom: 1rem;
  color: #c9d1d9;
}

.project-grid .card a {
  display: inline-block;
  margin-top: 1rem;
  font-weight: 500;
  color: var(--accent);
  transition: text-shadow var(--transition);
}

.project-grid .card a:hover {
  text-shadow: 0 0 6px var(--accent);
}

.cv-container {
  text-align: center;
  margin: 3rem 0;
}

.cv-download {
  display: inline-block;
  padding: 1rem 2rem;
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 1.1rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid var(--accent);
  transition: background var(--transition), transform var(--transition);
}

.cv-download i {
  margin-right: 0.6rem;
  color: var(--accent);
}

.cv-download:hover {
  background: rgba(88, 166, 255, 0.1);
  transform: translateY(-4px);
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1.5rem;
}

.contact-links a {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 1.1rem;
  font-weight: 500;
  transition: color var(--transition), transform var(--transition);
}

.contact-links a:hover {
  color: var(--accent);
  transform: translateX(5px);
}

@media (max-width: 768px) {
  .nav-links {
      gap: 1rem;
      font-size: 0.9rem;
  }
}