/* ============================================================
   IVOTRA — Responsive Stylesheet
   ============================================================ */

/* --- Large Desktop (1400px+) --- */
@media (min-width: 1400px) {
  :root { --max-width: 1320px; }
}

/* --- Desktop (max 1200px) --- */
@media (max-width: 1200px) {
  .footer__top {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
  .footer__brand {
    grid-column: 1 / -1;
    display: flex;
    align-items: flex-start;
    gap: 48px;
  }
  .footer__tagline {
    max-width: 360px;
    margin-bottom: 0;
  }
}

/* --- Tablet (max 1024px) --- */
@media (max-width: 1024px) {
  :root {
    --space-10: 96px;
  }

  h1 { font-size: clamp(2.25rem, 4.5vw, 3.5rem); }

  .nav__links { display: none; }
  .nav__cta   { display: none; }
  .nav__menu-btn { display: flex; }

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

  .who {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .who__visual {
    order: -1;
  }

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

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

  .cta-banner {
    flex-direction: column;
    align-items: flex-start;
    gap: 32px;
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .mv-grid {
    grid-template-columns: 1fr;
  }

  .hero__stats {
    gap: 32px;
  }
}

/* --- Small Tablet / Large Mobile (max 768px) --- */
@media (max-width: 768px) {
  :root {
    --space-10: 72px;
    --space-9:  64px;
    --space-8:  48px;
    --space-7:  40px;
  }

  .container {
    padding-inline: var(--space-5);
  }

  h1 { font-size: clamp(2rem, 6vw, 3rem); }
  h2 { font-size: clamp(1.5rem, 4vw, 2rem); }

  .pillars {
    grid-template-columns: 1fr;
    background: transparent;
    border: none;
    border-radius: 0;
    gap: 1px;
  }

  .pillar {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

  .expertise-grid {
    grid-template-columns: 1fr;
  }

  .research-grid {
    grid-template-columns: 1fr;
  }

  .training-grid {
    grid-template-columns: 1fr;
  }

  .principles-grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .hero__stats {
    flex-wrap: wrap;
    gap: 24px 40px;
    padding-top: 32px;
    margin-top: 48px;
  }

  .footer__top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer__brand {
    flex-direction: column;
    gap: 16px;
  }

  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .cta-banner {
    padding: 40px 32px;
  }

  .cta-banner__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-banner__actions .btn {
    justify-content: center;
  }

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

  .contact-form {
    padding: 32px 24px;
  }

  .scroll-top {
    bottom: 20px;
    right: 20px;
  }

  .filter-bar {
    gap: 8px;
  }

  .filter-btn {
    font-size: 0.8125rem;
    padding: 6px 12px;
  }

  .who__meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
}

/* --- Mobile (max 480px) --- */
@media (max-width: 480px) {
  :root {
    --space-10: 56px;
    --space-9:  48px;
    --space-8:  40px;
  }

  .container {
    padding-inline: var(--space-4);
  }

  .btn {
    font-size: 0.875rem;
    padding: 10px 18px;
  }

  .contact-link {
    padding: 12px;
  }

  .hero__heading {
    font-size: clamp(1.875rem, 7vw, 2.5rem);
  }

  .pillar {
    padding: 32px 24px;
  }

  .training-card {
    padding: 24px;
  }

  .footer__social {
    gap: 8px;
  }

  .hero__stat-value {
    font-size: 1.625rem;
  }
}

/* --- Print --- */
@media print {
  .nav,
  .footer,
  .scroll-top,
  .hero__actions,
  .cta-banner__actions,
  .btn {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .section {
    padding-block: 40px;
  }
}

/* --- Reduced motion --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .fade-in,
  .stagger-children > * {
    opacity: 1 !important;
    transform: none !important;
  }

  .hero__eyebrow-dot {
    animation: none;
  }
}