/**
 * IASClassroom.com - Responsive Stylesheet
 * Strict breakpoints: 320px, 360px, 480px, 768px, 1024px, 1440px
 */

/* Large Screens (Above 1440px) */
@media (min-width: 1440px) {
  .site-container {
    max-width: 1280px;
  }
}

/* Tablets and Below (Max 1024px) */
@media (max-width: 1024px) {
  :root {
    --header-height: 72px;
  }

  .desktop-nav {
    display: none;
  }

  .hamburger-btn {
    display: flex;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3.5rem;
    text-align: center;
  }

  .hero-content {
    align-items: center;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta-group {
    justify-content: center;
  }

  .hero-social-proof {
    justify-content: center;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }

  .about-portrait-wrap {
    max-width: 420px;
    margin: 0 auto;
  }

  .about-highlight-box {
    border-left: none;
    border-top: 3px solid var(--gold-primary);
    border-radius: var(--radius-sm);
  }

  .methodology-grid,
  .ecosystem-grid,
  .ca-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .testimonial-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .premium-spotlight-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
  }

  .cta-card {
    flex-direction: column;
    text-align: center;
    padding: 3rem 2rem;
    gap: 2.5rem;
  }

  .cta-actions {
    justify-content: center;
  }

  .stat-badge-float {
    padding: 1.5rem 2rem;
  }
}

/* Small Tablets and Large Phones (Max 768px) */
@media (max-width: 768px) {
  section {
    padding: 3.5rem 0;
  }

  .top-announcement-bar {
    font-size: 0.78rem;
  }

  .top-announcement-content {
    gap: 0.4rem;
  }

  .hero-social-proof {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    width: 100%;
  }

  .proof-number {
    font-size: 1.5rem;
  }

  .methodology-grid,
  .ecosystem-grid,
  .ca-cards-grid,
  .account-docs-grid {
    grid-template-columns: 1fr;
  }

  .about-pillars-grid {
    grid-template-columns: 1fr;
  }

  .testimonial-card-editorial {
    padding: 2rem 1.5rem;
  }

  .testimonial-text {
    font-size: 1.05rem;
  }

  .premium-card-spotlight {
    padding: 2rem 1.5rem;
  }

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

  .footer-bottom-inner {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }

  .account-header-card {
    padding: 1.75rem 1.25rem;
    flex-direction: column;
    align-items: flex-start;
  }

  .otp-digit-input {
    width: 44px;
    height: 50px;
    font-size: 1.25rem;
  }
}

/* Mobile Devices (Max 480px) */
@media (max-width: 480px) {
  :root {
    --header-height: 64px;
  }

  .site-container {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .brand-title {
    font-size: 1.15rem;
  }

  .brand-subtitle {
    font-size: 0.68rem;
  }

  .brand-emblem {
    width: 36px;
    height: 36px;
  }

  .btn {
    padding: 0.75rem 1.25rem;
    font-size: 0.9rem;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-group .btn {
    width: 100%;
  }

  .stats-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .stat-box {
    padding: 1rem;
  }

  .cta-actions {
    flex-direction: column;
    width: 100%;
  }

  .cta-actions .btn {
    width: 100%;
  }

  .otp-inputs-wrapper {
    gap: 0.35rem;
  }

  .otp-digit-input {
    width: 40px;
    height: 48px;
    font-size: 1.15rem;
  }

  .auth-card {
    padding: 2rem 1.25rem;
  }
}

/* Very Small Mobile (320px - 360px) */
@media (max-width: 360px) {
  .otp-inputs-wrapper {
    gap: 0.25rem;
  }

  .otp-digit-input {
    width: 36px;
    height: 44px;
    font-size: 1rem;
  }
}

/* Accessibility: 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;
  }
}