/* ============================
   RESPONSIVE — mobile-first
============================ */

/* ≥ 480px (large phones) */
@media (min-width: 480px) {
  .services__grid { grid-template-columns: repeat(2, 1fr); }
  .benefits__grid { grid-template-columns: 1fr; }
  .trust__gallery { grid-template-columns: repeat(2, 1fr); }
  .trust__cases { grid-template-columns: repeat(2, 1fr); }
  .trust__reviews { grid-template-columns: 1fr; }
  .partners__grid { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: repeat(2, 1fr); }
}

/* ≥ 768px (tablets) */
@media (min-width: 768px) {
  :root { --header-h: 80px; }

  .nav { display: flex; }

  .header__brand-text { display: flex; }

  .burger { display: none; }

  .hero__inner {
    grid-template-columns: 1.4fr 1fr;
    gap: var(--space-8);
    align-items: center;
  }

  .hero__logo-card {
    aspect-ratio: 3/4;
    border: var(--border-thick);
    border-color: var(--color-accent);
    overflow: hidden;
    background: var(--color-bg);
    box-shadow: var(--shadow-flat-lg);
    position: relative;
  }

  .hero__logo-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .hero__logo-card::before {
    content: '';
    position: absolute;
    top: -1px; left: -1px;
    width: 24px; height: 24px;
    border-top: 4px solid var(--color-accent);
    border-left: 4px solid var(--color-accent);
    z-index: 3;
  }

  .hero__logo-card::after {
    content: '';
    position: absolute;
    bottom: -1px; right: -1px;
    width: 24px; height: 24px;
    border-bottom: 4px solid var(--color-accent);
    border-right: 4px solid var(--color-accent);
    z-index: 3;
  }

  .services__grid { grid-template-columns: repeat(2, 1fr); }
  .benefits__grid { grid-template-columns: repeat(3, 1fr); }
  .benefit { border-right: none; border-bottom: none; }
  .benefit:last-child { border-right: none; }

  .trust__gallery { grid-template-columns: repeat(4, 1fr); }
  .trust__cases { grid-template-columns: repeat(3, 1fr); }
  .trust__reviews { grid-template-columns: repeat(3, 1fr); }
  .partners__grid { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1.2fr 1fr 1.4fr; }

  .cta__inner {
    grid-template-columns: 0.8fr 1.2fr;
    gap: var(--space-8);
  }

  .form { padding: var(--space-7); }
}

/* ≥ 1024px (small desktop) */
@media (min-width: 1024px) {
  .services__grid { grid-template-columns: repeat(4, 1fr); }

  .hero__title { font-size: clamp(3rem, 6.5vw, 5.5rem); }

  .cta__inner {
    grid-template-columns: 0.6fr 1fr 1fr;
  }
}

/* ≥ 1280px (large desktop) */
@media (min-width: 1280px) {
  .container { padding-inline: 48px; }
  .services__grid { gap: var(--space-6); }
}

/* Mobile navigation — открытое меню */
@media (max-width: 767px) {
  .burger { display: flex; align-items: center; justify-content: center; }

  .nav {
    position: fixed;
    inset: var(--header-h) 0 0 0;
    background: var(--color-bg);
    border-top: var(--border-thick);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-6);
    gap: 0;
    transform: translateX(100%);
    transition: transform var(--transition);
    z-index: 99;
    overflow-y: auto;
  }

  .nav.is-open {
    transform: translateX(0);
  }

  .nav__link {
    padding: var(--space-4) 0;
    font-size: 1.1rem;
    border-bottom: var(--border-thin);
  }

  .header__actions .btn { display: none; }

  .hero { min-height: auto; padding-top: var(--space-7); padding-bottom: var(--space-7); }
  .hero__scroll { display: none; }
  .hero__meta { gap: var(--space-5); }
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .marquee__track { animation: none; }
}

/* Anchor offset for sticky header */
section[id] {
  scroll-margin-top: calc(var(--header-h) + 16px);
}