/* ===== Tablet ===== */
@media (max-width: 992px) {
  .interviews-grid,
  .conferences-grid,
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .contact-inner {
    grid-template-columns: 1fr;
  }

  .contact-info {
    border-right: none;
    padding-right: 0;
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: var(--space-md);
  }
}

/* ===== Mobile ===== */
@media (max-width: 640px) {
  :root {
    --section-padding: 3.5rem;
  }

  .header-nav,
  .header-social {
    display: none;
  }

  .header-burger {
    display: flex;
  }

  .header-logo {
    transform: translateX(15px);
  }

  .header-mobile-title {
    display: block;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    font-family: 'Karantina', sans-serif;
    font-weight: 700;
    font-size: 2.2rem;
    letter-spacing: 1px;
    color: #000;
  }

  .interviews-grid,
  .conferences-grid,
  .articles-grid,
  .videos-row {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 50vh;
  }

  .hero-bg-image {
    object-position: center top;
    transform: scale(1.25);
    transform-origin: 50% 0%;
  }

  .hero-content {
    margin-top: 0;
  }

  #interviews {
    padding-top: 20px;
  }

  #interviews .section-title,
  #conferences .section-title,
  #articles .section-title {
    font-size: 3rem;
  }

  .section-stat-line {
    font-size: 1.2rem;
  }

  .hero-content h1 {
    display: none;
  }

  .reveal {
    transition-duration: 0.5s;
  }

  .interview-card:first-child .interview-body h3,
  .interview-card:nth-child(2) .interview-body h3 {
    margin-top: 5px;
  }

  .logo-marquee-track {
    gap: 24px;
    animation-duration: 8s;
  }

  .contact-social {
    max-width: 230px;
    margin-left: auto;
    margin-right: auto;
  }

  .contact-social a {
    width: 64px;
    height: 64px;
  }

  .contact-social svg {
    width: 28px;
    height: 28px;
  }

  .featured-video-wrap {
    max-width: 280px;
  }

  .featured-video-wrap video {
    aspect-ratio: 9 / 13;
    object-position: center top;
  }
}

/* Mobile nav open state (JS toggles .is-open on .mobile-menu) */
@media (max-width: 640px) {
  .mobile-menu {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 84px;
    right: 0;
    left: 0;
    background-color: #fff;
    box-shadow: var(--shadow-soft);
    padding: var(--space-md);
    gap: var(--space-md);
    opacity: 0;
    transform: translateY(-12px);
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0s linear 0.3s;
  }

  .mobile-menu.is-open {
    opacity: 1;
    transform: translateY(0);
    visibility: visible;
    pointer-events: auto;
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0s linear 0s;
  }

  .mobile-menu .header-nav {
    display: block;
    text-align: center;
  }

  .mobile-menu .header-nav ul {
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
  }

  .mobile-menu .header-social {
    display: flex;
    justify-content: flex-start;
  }
}