.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-pill, 999px);
  background: var(--accent-500);
  color: var(--text-inverse);
  z-index: 999;
  transition: transform var(--transition-base), left var(--transition-base);
}

.skip-link:focus-visible {
  left: 1.5rem;
  transform: translateY(1.5rem);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(11, 18, 32, 0.78);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-soft);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.site-header.is-scrolled {
  background: rgba(11, 18, 32, 0.92);
  box-shadow: 0 18px 45px rgba(8, 15, 35, 0.35);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.85rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  color: inherit;
  text-decoration: none;
}

.brand__mark {
  width: 44px;
  height: 44px;
  filter: drop-shadow(0 12px 24px rgba(40, 110, 210, 0.25));
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.brand__name {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

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

.nav-toggle {
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid var(--border-soft);
  background: rgba(15, 25, 40, 0.75);
  display: none;
}

.nav-toggle__bar,
.nav-toggle__bar::before,
.nav-toggle__bar::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 18px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 999px;
  transform: translateX(-50%);
  transition: transform 0.35s cubic-bezier(0.25, 0.8, 0.25, 1), opacity 0.2s linear;
}

.nav-toggle__bar::before {
  top: -6px;
}

.nav-toggle__bar::after {
  top: 6px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar {
  transform: translate(-50%, 0) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar::before {
  transform: translateX(-50%) rotate(-90deg);
  top: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar::after {
  opacity: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-nav__link {
  position: relative;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 0.4rem 0;
  transition: color var(--transition-base);
}

.site-nav__link[data-active="true"],
.site-nav__link:hover {
  color: var(--text-primary);
}

.site-nav__link[data-active="true"]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.5rem;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-400), var(--accent-500));
  border-radius: 999px;
}

.lang-switcher {
  display: inline-flex;
  padding: 0.25rem;
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  background: rgba(20, 31, 51, 0.65);
  gap: 0.25rem;
}

.lang-switcher__btn {
  min-width: 44px;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-weight: 600;
}

.lang-switcher__btn.is-active {
  background: linear-gradient(135deg, var(--accent-400), var(--accent-500));
  color: var(--text-on-accent, #06102a);
  box-shadow: 0 10px 24px rgba(93, 164, 255, 0.35);
}

.section {
  padding: var(--space-8) 0;
}

.section--muted {
  background: var(--surface-800);
}

.section__intro {
  max-width: 640px;
  margin: 0 0 var(--space-6);
}

.section__intro h2 {
  margin-bottom: var(--space-3);
}

.section__intro p {
  color: var(--text-muted);
}

.hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(5rem, 9vw, 7.5rem);
}

.hero__background {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.hero__gradient {
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
}

.hero__texture {
  position: absolute;
  inset: -20%;
  background-image: radial-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 0);
  background-size: 18px 18px;
  opacity: 0.25;
  mix-blend-mode: screen;
}

.hero__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(2.5rem, 5vw, 4rem);
  align-items: center;
}

.hero__copy p {
  color: var(--text-muted);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.3em;
  font-size: var(--step--1);
  color: var(--accent-300);
  margin-bottom: var(--space-3);
}

.hero__headline {
  margin-bottom: var(--space-4);
}

.hero__lead {
  font-size: var(--step-1);
  margin-bottom: var(--space-5);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.hero__bullet-list {
  display: grid;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  color: var(--text-muted);
}

.hero__meta-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.hero__meta dt {
  font-size: 0.8rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-300);
}

.hero__meta dd {
  margin: 0.35rem 0 0;
  font-weight: 600;
}

.hero__portrait {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.skills-grid,
.projects-grid {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.timeline {
  border-left: 1px solid var(--border-soft);
  display: grid;
  gap: 2.5rem;
}

.timeline__item {
  position: relative;
  padding-left: 2.5rem;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -0.55rem;
  top: 0.2rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-400), var(--accent-500));
  box-shadow: 0 0 0 6px rgba(92, 165, 255, 0.15);
}

.timeline__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 0.65rem;
}

.timeline__body ul {
  display: grid;
  gap: 0.6rem;
  color: var(--text-muted);
}

.about__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(2.5rem, 5vw, 4rem);
  align-items: center;
}

.about__tagline {
  font-size: var(--step-1);
  margin: var(--space-3) 0;
  color: var(--accent-300);
}

.stat-list {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: var(--space-4);
}

.stat__value {
  font-size: var(--step-2);
  font-weight: 600;
  color: var(--accent-300);
  display: block;
}

.downloads {
  display: grid;
  gap: var(--space-4);
  align-items: start;
}

.downloads__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.contact {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(2rem, 4vw, 4rem);
}

.contact__channels {
  display: grid;
  gap: 0.75rem;
  margin-top: var(--space-4);
}

.channel__label {
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-300);
  margin-bottom: 0.25rem;
}

.contact__form form {
  display: grid;
  gap: 1rem;
  margin-top: var(--space-3);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-field span {
  font-weight: 500;
}

.form-field input,
.form-field textarea {
  padding: 0.75rem 1rem;
  border-radius: 14px;
  border: 1px solid var(--border-soft);
  background: rgba(20, 30, 50, 0.6);
  color: inherit;
}

.form-field textarea {
  min-height: 140px;
}

.form-privacy {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.site-footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border-soft);
  background: rgba(9, 14, 24, 0.85);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
}

.projects-index .filters {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-3);
}

.projects-index label {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-weight: 500;
  color: var(--text-muted);
}

.projects-index select {
  min-width: 180px;
  padding: 0.65rem 1rem;
  border-radius: 14px;
  border: 1px solid var(--border-soft);
  background: rgba(18, 26, 42, 0.75);
  color: inherit;
}

.projects-status {
  color: var(--text-muted);
  margin-bottom: var(--space-4);
}

.project-detail .card {
  background: rgba(18, 26, 42, 0.78);
}

.project-hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: clamp(2rem, 4vw, 3.5rem);
  margin-bottom: var(--space-6);
}

.project-hero__meta {
  display: grid;
  gap: 1rem;
  margin-top: var(--space-4);
}

.project-hero__meta dl {
  display: grid;
  gap: 0.65rem;
}

.project-hero__meta dl div {
  display: grid;
  gap: 0.25rem;
}

.project-hero__meta dt {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent-300);
}

.project-hero__meta dd {
  margin: 0;
  font-weight: 600;
}

.project-hero__actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.project-detail__grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin-bottom: var(--space-5);
}

.gallery {
  display: grid;
  gap: var(--space-4);
}

.gallery__item {
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

@media (max-width: 1024px) {
  .hero__grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .hero__portrait {
    max-width: 340px;
    margin: 0 auto;
  }
  .about__grid,
  .contact {
    grid-template-columns: minmax(0, 1fr);
  }
  .site-nav {
    position: fixed;
    inset: 0 0 auto;
    top: var(--header-height, 4rem);
    flex-direction: column;
    align-items: stretch;
    padding: 1.5rem;
    background: rgba(11, 18, 32, 0.96);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.35s ease, opacity 0.35s ease;
  }
  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .site-nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
  .nav-toggle {
    display: inline-flex;
    justify-content: center;
    align-items: center;
  }
}

@media (max-width: 720px) {
  .section {
    padding: var(--space-6) 0;
  }
  .site-header__inner {
    padding: 0.75rem 0;
  }
  .brand__mark {
    width: 40px;
    height: 40px;
  }
  .downloads__actions,
  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }
  .timeline {
    border-left: none;
  }
  .timeline__item {
    padding-left: 0;
  }
  .timeline__item::before {
    display: none;
  }
}