:root {
  --bg: #0f1115;
  --bg-alt: #171a21;
  --text: #e8e9ec;
  --text-muted: #a3a7b0;
  --accent: #6ea8fe;
  --border: #2a2e37;
  --max-width: 960px;
}

* {
  box-sizing: border-box;
}

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

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

a:hover {
  text-decoration: underline;
}

.site-header {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
}

.nav-links a {
  margin-left: 1.5rem;
  color: var(--text-muted);
}

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

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

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.hero {
  padding: 5rem 0 3rem;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.hero p {
  color: var(--text-muted);
  font-size: 1.1rem;
}

.section {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
}

.section h2 {
  margin-bottom: 1rem;
}

.section-intro {
  color: var(--text-muted);
  margin-top: -0.5rem;
  margin-bottom: 2rem;
}

.meta {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: -0.25rem 0 0.75rem;
}

.hero-compact {
  padding: 3rem 0 2rem;
}

.hero-with-photo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  text-align: left;
}

.hero-with-photo .hero-text {
  max-width: 480px;
}

.hero-photo {
  flex: 0 0 auto;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: repeating-linear-gradient(
    135deg,
    var(--border),
    var(--border) 8px,
    var(--bg) 8px,
    var(--bg) 16px
  );
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  overflow: hidden;
  position: relative;
}

.hero-photo span {
  opacity: 0.7;
}

.hero-photo img {
  display: none;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: inherit;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
}

.card h3 {
  margin-top: 0;
}

.card a {
  display: block;
  margin-top: 0.5rem;
}

/* Achievements timeline */
.timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.timeline-item {
  display: flex;
  gap: 1.25rem;
  position: relative;
}

.timeline-marker {
  flex: 0 0 auto;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  position: relative;
  z-index: 1;
}

.timeline-item:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 1.5rem;
  top: 3rem;
  bottom: -2rem;
  width: 1px;
  background: var(--border);
}

.timeline-content {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

/* Alternate the photo side per entry: 1st photo-right, 2nd photo-left, ... */
.timeline-item:nth-child(odd) .timeline-content {
  flex-direction: row-reverse;
}

.timeline-text {
  flex: 1 1 auto;
  min-width: 0;
}

.timeline-text h3 {
  margin: 0 0 0.25rem;
}

.timeline-text p:last-child {
  margin-bottom: 0;
}

.timeline-photo-wrap {
  flex: 0 0 auto;
  width: 248px;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.timeline-photo {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 8px;
  background: repeating-linear-gradient(
    135deg,
    var(--border),
    var(--border) 8px,
    var(--bg) 8px,
    var(--bg) 16px
  );
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  overflow: hidden;
  position: relative;
}

.timeline-photo-caption {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
}

.timeline-photo span {
  opacity: 0.7;
}

.timeline-photo img {
  display: none;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: inherit;
}

/* Skills page */
.skill-group {
  margin-bottom: 1.75rem;
}

.skill-group h3 {
  margin-bottom: 0.75rem;
  font-size: 1rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.tag-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 0;
  padding: 0;
}

.tag-list li {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.4rem 0.9rem;
  font-size: 0.9rem;
}

.lang-table {
  width: 100%;
  max-width: 360px;
  border-collapse: collapse;
}

.lang-table th,
.lang-table td {
  text-align: left;
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

.lang-table th {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

@media (max-width: 480px) {
  .timeline-item {
    gap: 0.85rem;
  }
  .timeline-marker {
    width: 2.25rem;
    height: 2.25rem;
    font-size: 1rem;
  }
  .timeline-item:not(:last-child)::before {
    left: 1.125rem;
    top: 2.25rem;
  }
  .timeline-content {
    padding: 1rem;
    flex-direction: column !important;
  }
  .timeline-photo-wrap {
    width: 100%;
    max-width: 280px;
  }
}

.site-footer {
  text-align: center;
  padding: 2rem 1.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
  margin-top: 2rem;
}

@media (max-width: 480px) {
  .nav-links a {
    margin-left: 1rem;
  }
  .hero h1 {
    font-size: 2rem;
  }
  .hero-with-photo {
    flex-direction: column;
    text-align: center;
  }
}