/* 768px ve altı: tablet / mobil */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    justify-content: flex-start;
    padding: 1.5rem;
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.25s ease, opacity 0.25s ease, visibility 0.25s;
  }
  .main-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav-list, .nav-user {
    flex-direction: column;
    width: 100%;
    gap: 0.5rem;
  }
  .nav-list a, .nav-user a {
    display: block;
    padding: 0.75rem;
    text-align: center;
  }
  .nav-toggle[aria-expanded="true"]::before {
    box-shadow: none;
    transform: rotate(45deg);
    position: relative;
    top: 2px;
  }
  .nav-toggle[aria-expanded="true"]::after {
    content: '';
    position: absolute;
    width: 22px;
    height: 2px;
    background: currentColor;
    transform: rotate(-90deg);
  }
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
  .form-control { max-width: none; }
}

/* 480px ve altı: küçük mobil */
@media (max-width: 480px) {
  .main-content { padding-left: 0.75rem; padding-right: 0.75rem; }
  .container { padding-left: 0.75rem; padding-right: 0.75rem; }
  .footer-links { gap: 0.75rem; }
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.25rem; }
}

/* 1024px: grid ayarları */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}