.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  border-bottom: 1px solid transparent;
  transition: background 180ms ease, border-color 180ms ease, backdrop-filter 180ms ease;
}

.site-header.is-scrolled {
  border-color: var(--color-border-soft);
  background: rgba(0, 0, 0, 0.78);
  backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 88px;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-24);
  min-width: 0;
}

.hero {
  min-height: calc(100svh - 88px);
  display: grid;
  align-items: center;
  padding-top: var(--spacing-48);
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 0.72fr);
  gap: var(--spacing-80);
  align-items: center;
}

.hero__grid > *,
.section__grid > *,
.contact__grid > *,
.bento-grid > *,
.skill-matrix > * {
  min-width: 0;
}

.hero__content {
  display: grid;
  gap: var(--spacing-24);
  min-width: 0;
  max-width: 100%;
}

.hero__role {
  min-height: 40px;
  color: var(--color-halo-pale);
  font-family: var(--font-inter);
  font-size: var(--text-xl);
  font-weight: var(--font-weight-regular);
  line-height: var(--leading-xl);
}

.hero__copy {
  max-width: 58ch;
  color: var(--color-halo-pale);
  font-size: var(--text-xl);
  line-height: var(--leading-xl);
  overflow-wrap: anywhere;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-16);
  margin-top: var(--spacing-8);
  max-width: 100%;
}

.section__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: var(--spacing-80);
  align-items: start;
}

.section__grid--about {
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.2fr);
}

.section__content {
  display: grid;
  gap: var(--spacing-24);
}

.skill-matrix {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--spacing-16);
}

.bento-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(280px, 0.92fr);
  grid-auto-rows: minmax(240px, auto);
  gap: var(--spacing-16);
}

.project-card--featured {
  grid-row: span 2;
}

.contact__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: var(--spacing-80);
}

.footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: var(--spacing-24);
  align-items: center;
}

.error-page {
  min-height: 100svh;
}

.error-shell {
  width: min(720px, calc(100% - 40px));
  min-height: 100svh;
  margin-inline: auto;
  display: grid;
  align-content: center;
  gap: var(--spacing-32);
}

@media (max-width: 980px) {
  .nav__menu {
    position: fixed;
    inset: 88px 16px auto 16px;
    display: grid;
    gap: var(--spacing-8);
    padding: var(--spacing-16);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-default);
    background: rgba(2, 2, 2, 0.96);
    box-shadow: var(--shadow-subtle);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-12px);
    transition: opacity 180ms ease, transform 180ms ease;
  }

  .nav__menu.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .hero__grid,
  .section__grid,
  .section__grid--about,
  .contact__grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .terminal-card {
    max-width: 620px;
    justify-self: start;
  }
}

@media (max-width: 720px) {
  .nav {
    min-height: 72px;
  }

  .nav__menu {
    inset: 72px 16px auto 16px;
  }

  .brand__text small {
    display: none;
  }

  .hero__grid {
    gap: var(--spacing-48);
  }

  .skill-matrix,
  .bento-grid,
  .footer__grid {
    grid-template-columns: 1fr;
  }

  .project-card--featured {
    grid-row: auto;
  }

  .footer__grid {
    justify-items: start;
  }
}

@media (max-width: 520px) {
  .hero {
    padding-top: var(--spacing-32);
  }

  .hero__content,
  .terminal-card {
    width: 100%;
    max-width: 100%;
  }

  .hero__actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .hero__actions .btn {
    width: 100%;
  }
}