/* ==========================================================================
   Responsive — tablet ve mobil kırılımlar + off-canvas menü
   ========================================================================== */

/* --- Tablet --- */
@media (max-width: 1024px) {
  :root { --outer-pad: 24px; }

  .section { padding-block: var(--space-96); }
  .section--tight { padding-block: var(--space-80); }

  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }

  .stat-strip { grid-template-columns: repeat(2, 1fr); gap: var(--space-32) var(--space-24); }

  .intro-split { grid-template-columns: 1fr; gap: var(--space-48); }
  .contact-band { grid-template-columns: 1fr; gap: var(--space-48); }

  .footer__top { grid-template-columns: 1fr 1fr; gap: var(--space-32); }
  .footer__brand { grid-column: 1 / -1; }

  .cta-banner { grid-template-columns: 1fr; gap: var(--space-32); padding: var(--space-48); }
  .cta-banner__actions { justify-content: flex-start; }
}

/* --- Mobile: off-canvas menü --- */
@media (max-width: 860px) {
  .nav__toggle { display: block; }

  .nav__menu {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(360px, 86vw);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-left: 0;
    padding: calc(var(--header-h) + 16px) var(--space-24) var(--space-32);
    background: var(--color-white);
    box-shadow: var(--shadow-menu);
    transform: translateX(100%);
    transition: transform var(--dur-mid) var(--ease);
    overflow-y: auto;
    z-index: 90;
  }
  .nav__menu.is-open { transform: translateX(0); }

  .nav__item { width: 100%; border-bottom: 1px solid var(--border); }
  .nav__link {
    width: 100%;
    justify-content: space-between;
    padding: 16px 4px;
    font-size: 1.0625rem;
  }
  .nav__cta { margin: var(--space-24) 0 0; }
  .nav__cta .btn { width: 100%; justify-content: center; }

  /* Mega menü -> mobil akordeon */
  .megamenu {
    position: static;
    transform: none;
    width: 100%;
    grid-template-columns: 1fr;
    border: none;
    box-shadow: none;
    opacity: 1;
    visibility: hidden;
    pointer-events: none;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--dur-mid) var(--ease);
  }
  .nav__item.is-open .megamenu {
    visibility: visible;
    pointer-events: auto;
    transform: none;
    max-height: 1200px;
    padding-bottom: var(--space-16);
  }
  .megamenu__aside { display: none; }
  .megamenu__body { padding: 0 0 var(--space-8); }
  .megamenu__links { grid-template-columns: 1fr; }

  /* Menü arkası overlay */
  .nav-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(17, 19, 24, 0.45);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--dur-mid);
    z-index: 80;
  }
  .nav-backdrop.is-open { opacity: 1; visibility: visible; }

  body.menu-open { overflow: hidden; }
}

/* --- Mobile small --- */
@media (max-width: 640px) {
  :root { --outer-pad: 16px; }

  .brand__logo {
    width: 150px;
    height: 48px;
  }

  .section { padding-block: var(--space-64); }
  .section--tight { padding-block: var(--space-64); }

  .section-title { font-size: 1.875rem; }
  .section-head { margin-bottom: var(--space-32); }

  .grid--3,
  .grid--2,
  .timeline,
  .affiliate-grid { grid-template-columns: 1fr; }

  /* Daha derli toplu mobil grid'ler */
  .grid--4,
  .stat-strip { grid-template-columns: repeat(2, 1fr); }

  .company-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-12); }
  .company-tile { aspect-ratio: 1 / 1; }
  .company-tile__bar { padding: var(--space-16) var(--space-16) var(--space-12); }
  .company-tile__name { font-size: 0.9375rem; }
  .company-tile__sector { font-size: 0.75rem; }

  .affiliate-card { padding: var(--space-24); }
  .affiliate-card__icon { width: 48px; height: 48px; }

  .home-history .section-head {
    margin-bottom: var(--space-24);
  }
  .home-history .section-title {
    max-width: 10ch;
    font-size: 2rem;
    line-height: 1.08;
  }
  .home-history .section-intro {
    max-width: 28rem;
    font-size: 1.0625rem;
    line-height: 1.55;
  }
  .home-history .timeline {
    gap: var(--space-16);
    margin-top: var(--space-32);
  }
  .timeline::before { display: none; }
  .timeline__item {
    min-height: 0;
    padding: var(--space-24) var(--space-20, 20px) var(--space-24) 72px;
    background: #fff;
    border: 1px solid var(--border);
    border-left: 3px solid var(--action);
    box-shadow: 0 10px 26px rgba(17, 19, 24, 0.05);
  }
  .timeline__item::before {
    top: 26px;
    left: 24px;
    width: 12px;
    height: 12px;
    box-shadow: 0 0 0 7px rgba(var(--brand-rgb),0.13);
  }
  .timeline__year {
    font-size: 2.125rem;
    line-height: 1;
  }
  .timeline__item h3 {
    margin-top: var(--space-12);
    font-size: 1rem;
  }
  .timeline__item p {
    max-width: 34rem;
    font-size: 0.9375rem;
    line-height: 1.55;
  }
  .home-history__action {
    margin-top: var(--space-32);
  }
  .home-history__action .btn {
    width: 100%;
    justify-content: center;
  }

  .section-toolbar { flex-direction: column; align-items: flex-start; }

  .hero__content { padding-block: var(--space-64); }
  .hero__actions .btn { flex: 1; justify-content: center; }

  .footer__top { grid-template-columns: 1fr; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }

  .cta-banner { padding: var(--space-32); }
  .cta-banner h2 { font-size: 1.625rem; }
}