@media (max-width: 900px) {
  .hero {
    gap: 30px;
    grid-template-columns: 1.1fr 0.9fr;
  }
  .project-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .about-layout,
  .contact-layout {
    gap: 35px;
  }
  .site-footer {
    grid-template-columns: 1fr 1fr;
  }
  .footer-links {
    grid-column: 1;
  }
  .copyright {
    grid-column: 2;
    grid-row: 2;
    text-align: right;
  }
  .main-nav {
    gap: 17px;
  }
  .service-item {
    padding-inline: 12px;
  }
}
@media (max-width: 680px) {
  .site-shell {
    width: min(calc(100% - 32px), var(--max));
  }
  .site-header {
    height: 70px;
  }
  .mobile-menu-button {
    display: flex;
    flex-direction: column;
    gap: 5px;
  }
  .mobile-menu-button span {
    display: block;
    width: 15px;
    height: 1px;
    background: var(--text);
  }
  .main-nav {
    display: none;
    position: absolute;
    top: 69px;
    left: -16px;
    right: -16px;
    padding: 18px 20px 22px;
    border-bottom: 1px solid var(--line);
    background: var(--bg);
    align-items: stretch;
    gap: 0;
    flex-direction: column;
  }
  .main-nav.open {
    display: flex;
  }
  .main-nav > a {
    padding: 13px 0;
    border-bottom: 1px solid var(--line);
  }
  .main-nav .nav-contact {
    margin-top: 12px;
    padding: 12px 14px;
    text-align: center;
    border: 0;
  }
  .theme-toggle {
    margin-top: 12px;
    align-self: flex-start;
  }
  .hero {
    padding: 55px 0 48px;
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .hero h1 {
    font-size: clamp(2.8rem, 13vw, 4.6rem);
  }
  .hero-copy {
    font-size: 14px;
  }
  .hero-visual {
    min-height: 310px;
  }
  .orbit-card {
    width: min(100%, 330px);
  }
  .floating-label {
    right: 0;
    top: 25px;
  }
  .service-strip {
    grid-template-columns: 1fr 1fr;
  }
  .service-item {
    padding: 15px 10px;
    border-bottom: 1px solid var(--line);
  }
  .service-item:nth-child(2) {
    border-right: 0;
  }
  .service-item:nth-child(3),
  .service-item:nth-child(4) {
    border-bottom: 0;
  }
  .service-item:first-child {
    padding-left: 10px;
  }
  .section {
    padding: 52px 0;
  }
  .section-head {
    align-items: start;
    flex-direction: column;
    gap: 12px;
  }
  .project-grid,
  .journal-grid {
    grid-template-columns: 1fr;
  }
  .project-card-body {
    padding: 16px;
  }
  .project-thumb {
    aspect-ratio: 1.7;
  }
  .page-intro {
    padding: 45px 0 10px;
  }
  .portfolio-toolbar {
    align-items: stretch;
  }
  .toolbar-controls {
    width: 100%;
  }
  .toolbar-controls .field {
    flex: 1;
    min-width: 0;
  }
  .about-layout,
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 26px;
  }
  .about-aside {
    position: static;
  }
  .timeline-item {
    grid-template-columns: 105px 1fr;
    gap: 12px;
  }
  .skill-groups {
    grid-template-columns: 1fr;
  }
  .contact-form {
    padding: 18px;
  }
  .form-grid,
  .detail-grid {
    grid-template-columns: 1fr;
  }
  .site-footer {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .footer-links,
  .copyright {
    grid-column: auto;
    grid-row: auto;
    text-align: left;
  }
  .project-dialog {
    padding: 20px;
  }
  .stat-row {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 7px;
  }
  .stat {
    padding: 12px;
  }
  .stat strong {
    font-size: 22px;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }
}