.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0 clamp(1.25rem, 3vw, 2.5rem);
  border-bottom: 1px solid var(--border);
  background: rgba(10, 11, 13, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.03em;
}

.brand__mark {
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 0.55rem;
  object-fit: cover;
  flex-shrink: 0;
  background: #f1f2f4;
  border: 1px solid var(--border-strong);
}

.brand__text {
  display: none;
}

@media (min-width: 640px) {
  .brand__text {
    display: inline;
  }
}

.nav {
  display: none;
  align-items: center;
  gap: 0.25rem;
  margin-left: auto;
  margin-right: 1rem;
}

.nav a {
  text-decoration: none;
  color: var(--fg-muted);
  font-size: 0.95rem;
  font-weight: 550;
  padding: 0.55rem 0.95rem;
  border-radius: 0.55rem;
  transition:
    color var(--duration) var(--ease),
    background var(--duration) var(--ease);
}

.nav a:hover,
.nav a[aria-current="true"] {
  color: var(--fg);
  background: rgba(241, 242, 244, 0.08);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}

.header-cta {
  display: none;
  padding: 0.65rem 1.2rem;
  border: 1px solid var(--border-strong);
  border-radius: 0.65rem;
  background: transparent;
  color: var(--fg);
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
  transition:
    background var(--duration) var(--ease),
    border-color var(--duration) var(--ease),
    color var(--duration) var(--ease);
}

.header-cta:hover {
  background: var(--fg);
  border-color: var(--fg);
  color: var(--ink);
}

.menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.6rem;
  height: 2.6rem;
  border: 1px solid var(--border);
  border-radius: 0.65rem;
  background: var(--glass);
  color: var(--fg);
}

.menu-toggle svg {
  width: 1.2rem;
  height: 1.2rem;
}

.nav-drawer {
  display: none;
  position: fixed;
  inset: calc(var(--header-h) + 0.5rem) 1rem auto;
  z-index: 49;
  padding: 1.1rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: rgba(10, 11, 13, 0.96);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
}

.nav-drawer.is-open {
  display: grid;
  gap: 0.35rem;
}

.nav-drawer a {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 650;
  text-decoration: none;
  padding: 0.7rem 0.8rem;
  border-radius: 0.65rem;
}

.nav-drawer a:hover {
  background: rgba(241, 242, 244, 0.06);
}

@media (min-width: 960px) {
  .nav {
    display: flex;
  }

  .header-cta {
    display: inline-flex;
  }

  .menu-toggle {
    display: none;
  }

  .nav-drawer {
    display: none !important;
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.95rem 1.4rem;
  border: 1px solid transparent;
  border-radius: 0.7rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.98rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  transition:
    background var(--duration) var(--ease),
    border-color var(--duration) var(--ease),
    transform var(--duration) var(--ease),
    box-shadow var(--duration) var(--ease);
}

.btn--primary {
  background: var(--fg);
  color: var(--ink);
}

.btn--primary:hover {
  background: var(--accent);
  color: var(--ink);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35);
}

.btn--ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--fg);
}

.btn--ghost:hover {
  border-color: var(--border-strong);
  background: var(--glass);
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 5rem clamp(1.25rem, 3vw, 2.5rem);
}

.section__label {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
}

.section__title {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(1.95rem, 4vw, 2.75rem);
  letter-spacing: -0.04em;
  line-height: 1.08;
}

.section__text {
  margin: 0;
  max-width: 38rem;
  color: var(--fg-muted);
}

.timeline {
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.85rem;
}

.timeline__item {
  padding: 1.25rem 1.35rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--glass);
  transition: border-color var(--duration) var(--ease);
}

.timeline__item:hover {
  border-color: var(--border-strong);
}

.timeline__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 0.9rem;
  margin-bottom: 0.3rem;
  font-size: 0.88rem;
  color: var(--fg-muted);
}

.timeline__role {
  margin: 0 0 0.2rem;
  font-family: var(--font-display);
  font-size: 1.18rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.timeline__org {
  margin: 0 0 0.4rem;
  font-weight: 600;
  color: var(--accent);
}

.timeline__body {
  margin: 0;
  color: var(--fg-muted);
  font-size: 0.98rem;
}

.project-grid {
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1rem;
}

@media (min-width: 720px) {
  .project-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.project {
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background:
    linear-gradient(155deg, rgba(241, 242, 244, 0.05), transparent 42%),
    var(--glass);
  transition: transform var(--duration) var(--ease), border-color var(--duration) var(--ease);
}

.project:hover {
  transform: translateY(-3px);
  border-color: var(--border-strong);
}

.project__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 750;
  letter-spacing: -0.03em;
}

.project__tags {
  margin: 0.4rem 0 0.6rem;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--accent);
}

.project__body {
  margin: 0;
  color: var(--fg-muted);
  font-size: 0.98rem;
}

.skill-cloud {
  margin: 1.75rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.skill-chip {
  padding: 0.75rem 1.05rem;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  background: var(--glass);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 650;
}

.skill-chip span {
  display: block;
  margin-top: 0.15rem;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 450;
  color: var(--fg-muted);
}

.split {
  margin-top: 1.75rem;
  display: grid;
  gap: 0.9rem;
}

@media (min-width: 800px) {
  .split {
    grid-template-columns: 1fr 1fr;
  }
}

.edu,
.award {
  padding: 1.2rem 1.3rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--glass);
}

.split > div > h3 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
}

.edu__title,
.award__title {
  margin: 0 0 0.25rem;
  font-family: var(--font-display);
  font-weight: 700;
}

.edu__meta,
.award__meta {
  margin: 0 0 0.3rem;
  font-size: 0.88rem;
  color: var(--fg-muted);
}

.edu__body,
.award__body {
  margin: 0;
  color: var(--fg-muted);
}

.edu + .edu,
.award + .award {
  margin-top: 0.75rem;
}

.contact {
  margin-top: 1.5rem;
  padding: 1.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(241, 242, 244, 0.05), transparent 50%),
    var(--glass);
}

.contact__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.35rem;
  margin: 0 0 0.85rem;
  padding: 0;
  list-style: none;
}

.contact__links a {
  font-family: var(--font-display);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid rgba(241, 242, 244, 0.25);
}

.contact__links a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.contact__note {
  margin: 0 0 1.1rem;
  color: var(--fg-muted);
  font-size: 0.98rem;
  max-width: 32rem;
  line-height: 1.5;
}

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

.site-footer a {
  color: var(--fg);
  text-decoration: none;
  font-weight: 650;
}

@media (prefers-reduced-motion: reduce) {
  .project:hover {
    transform: none;
  }
}