:root {
  --bg: #121212;
  --fg: #ffffff;
  --muted: rgba(255, 255, 255, 0.7);
  --line: rgba(255, 255, 255, 0.12);
  --accent: #ffffff;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               Helvetica, Arial, sans-serif;
  line-height: 1.6;
  font-size: 16px;
}

/* Language dropdown, fixed to the corner so it is reachable from any section.
   A <details> for the same reason the project panel is one: it opens without
   JavaScript, and it takes a third language as one more list item. */
.lang {
  position: fixed;
  top: 1rem;
  right: 1.25rem;
  z-index: 1;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
}

.lang summary {
  cursor: pointer;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.6rem;
  border-radius: 4px;
  color: var(--muted);
  transition: color 0.2s, background-color 0.2s;
}

.lang summary::-webkit-details-marker { display: none; }

.lang summary:hover,
.lang summary:focus-visible {
  color: var(--accent);
  background: rgba(255, 255, 255, 0.08);
}

/* The same chevron the project panel uses. */
.lang summary::after {
  content: "";
  width: 0.4rem;
  height: 0.4rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform 0.2s;
  flex: none;
}

.lang details[open] summary::after { transform: rotate(-135deg); }

/* Anchored to .lang, which is the positioned ancestor. */
.lang ul {
  position: absolute;
  right: 0;
  min-width: 8.5rem;
  margin: 0.35rem 0 0;
  padding: 0.25rem;
  list-style: none;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--bg);
}

.lang li a,
.lang li span {
  display: block;
  padding: 0.4rem 0.6rem;
  border-radius: 3px;
  text-decoration: none;
  color: var(--muted);
}

.lang li a:hover,
.lang li a:focus-visible {
  color: var(--accent);
  background: rgba(255, 255, 255, 0.08);
}

/* The language already being shown is plain text, not a link to itself. */
.lang li [aria-current] { color: var(--fg); }

/* Each section fills the viewport but grows if the content is taller. */
.screen {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 1.25rem;
  gap: 1.5rem;
}

.avatar {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
}

h1 {
  font-size: 1.25rem;
  font-weight: 500;
  margin: 0;
  text-align: center;
}

h2 {
  font-size: 1.25rem;
  font-weight: 500;
  margin: 0 0 1.5rem;
  text-align: center;
}

.bio {
  max-width: 700px;
  margin: 0;
  padding: 1rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--muted);
  text-align: left;
}

/* Profile links */
.social {
  display: flex;
  gap: 2.5rem;
}

.social a {
  display: inline-flex;
  padding: 0.5rem;
  color: var(--muted);
  border-radius: 50%;
  transition: color 0.2s, background-color 0.2s;
}

.social a:hover,
.social a:focus-visible {
  color: var(--accent);
  background: rgba(255, 255, 255, 0.08);
}

.social svg {
  width: 36px;
  height: 36px;
  fill: currentColor;
}

/* Projects accordion */
.projects { justify-content: flex-start; }

.panel {
  width: 100%;
  max-width: 900px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.04);
}

.panel summary {
  cursor: pointer;
  padding: 1rem 1.25rem;
  font-weight: 700;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.panel summary::-webkit-details-marker { display: none; }

/* Chevron that flips when the panel opens. */
.panel summary::after {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  margin-left: 1rem;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(45deg);
  transform-origin: center;
  transition: transform 0.2s;
  flex: none;
}

.panel[open] summary::after { transform: rotate(-135deg); }

.panel summary:hover { background: rgba(255, 255, 255, 0.04); }

.panel-body {
  padding: 0 1.25rem 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.panel-body p { margin: 1rem 0; }

.panel-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.panel-actions a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  color: var(--fg);
  text-decoration: none;
  text-transform: uppercase;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  transition: background-color 0.2s;
}

.panel-actions a:hover,
.panel-actions a:focus-visible { background: rgba(255, 255, 255, 0.08); }

.panel-actions svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

/* Push the demo link to the far side, as in the original layout. */
.panel-actions .demo { margin-left: auto; }

/* 404 */
.notfound {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 1.25rem;
}

.notfound p { margin: 0; }

.notfound a { color: var(--fg); }

@media (max-width: 480px) {
  .social { gap: 1.5rem; }
  .panel-actions .demo { margin-left: 0; }
}