/* Device-first overrides: phones, tablets, laptops and wide displays */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { min-width: 320px; overflow-x: hidden; }
img, svg { display: block; max-width: 100%; height: auto; }
.course-image { width: 100%; height: auto; aspect-ratio: 16 / 9; }
.hero-placeholder { width: 100%; }
.payment-qr { width: min(100%, 220px); height: auto; }
.legal-document { width: min(calc(100% - 2rem), 900px); }

@media (min-width: 1400px) {
  .hero-section .container, .mentor-section .container, .reviews-section .container { max-width: 1240px; }
  .hero-placeholder { min-height: 400px; }
  .display-4 { max-width: 15ch; }
}

@media (max-width: 1199.98px) {
  .hero-placeholder { min-height: 280px; }
}

@media (max-width: 991.98px) {
  .site-header .navbar { gap: .75rem; }
  .navbar-collapse { width: 100%; padding-top: .75rem; }
  .navbar-nav { align-items: flex-start !important; }
  .navbar .nav-link.active::after { display: none; }
  .navbar .nav-link.active { color: #5b4df5; }
  .navbar .btn { margin-left: 0 !important; }
  .hero-section .row { text-align: center; }
  .hero-section .btn { width: min(100%, 22rem); }
  .hero-placeholder { min-height: 240px; max-width: 420px; margin-inline: auto; }
  .hero-brand-mark { width: min(72vw, 260px); }
  .site-footer .text-md-end { text-align: left !important; }
}

@media (max-width: 767.98px) {
  .py-lg-6 { padding-top: 3.5rem; padding-bottom: 3.5rem; }
  .display-4 { font-size: clamp(2rem, 9vw, 3.15rem); }
  .h1, h1 { font-size: clamp(1.75rem, 7vw, 2.4rem); }
  .lead { font-size: 1.05rem; }
  .mentor-section { text-align: left; }
  .contact-graphs { padding: 1rem; }
  .topic-bars span { grid-template-columns: 5.25rem 1fr; font-size: .9rem; }
  .col-lg-5 > .card { height: auto; }
  .payment-details { padding: 1rem !important; }
  #course-description { max-width: none; }
  #payment-step .payment-details .d-flex { align-items: flex-start; }
}

@media (max-width: 575.98px) {
  .site-header .navbar { padding-top: .7rem !important; padding-bottom: .7rem !important; }
  .brand-lockup { max-width: calc(100% - 3.5rem); gap: .45rem; font-size: .94rem; }
  .brand-lockup img { width: 2.05rem; height: 2.05rem; border-radius: .55rem; }
  .navbar-toggler { flex: 0 0 auto; }
  .hero-placeholder { min-height: 200px; }
  .card-body, .card-footer { padding-left: 1rem !important; padding-right: 1rem !important; }
  .reviews-section .d-flex.justify-content-between { align-items: flex-start !important; flex-direction: column; }
  .review-controls { width: 100%; }
  .review-controls .btn { flex: 1; }
  .reviews-track { margin-right: -1rem; padding-right: 1rem; }
  .review-slide { flex-basis: min(86vw, 340px); min-height: 0; padding: 1.2rem; }
  .catalog-sales-bar { align-items: flex-start; flex-direction: column; padding: 1rem; }
  .catalog-trust { padding-top: .5rem; padding-left: 0; border-top: 1px solid rgba(91,77,245,.16); border-left: 0; }
  .site-footer .row { text-align: left; }
  .legal-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .65rem; }
  .legal-links a { overflow-wrap: anywhere; }
  .legal-document { width: calc(100% - 1.25rem); padding: 1.1rem; }
  .legal-document dt, .legal-document dd { width: 100%; }
  .cookie-notice { right: .75rem; bottom: .75rem; left: .75rem; max-width: none; max-height: calc(100dvh - 1.5rem); overflow-y: auto; }
  #payment-step .payment-details strong { max-width: 100%; margin-left: 0; text-align: left; }
}

/* Mobile navigation and footer */
.course-image { overflow: hidden; }
.course-image img { width: 100%; height: 100%; object-fit: cover; }
@media (max-width: 767.98px) {
  .site-header { position: sticky; top: 0; z-index: 1030; }
  #siteNav { margin-top: .5rem; border-top: 1px solid rgba(91,77,245,.12); }
  #siteNav.show { display: block !important; }
  #siteNav .navbar-nav { width: 100%; padding: .5rem 0; }
  #siteNav .nav-item, #siteNav .nav-link, #siteNav .btn { width: 100%; }
  #siteNav .nav-link { padding: .75rem .25rem; }
  #siteNav .btn { margin-top: .5rem; }
  .site-footer { margin-top: 2rem; }
  .site-footer .row { row-gap: 1.5rem; }
  .site-footer .col-md-3 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .5rem 1rem; }
  .site-footer .col-md-3 a { margin: 0; }
}
@media (max-width: 575.98px) {
  .site-header .container { padding-right: 1rem; padding-left: 1rem; }
  .site-header .navbar-brand span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .site-footer { margin-top: 1.5rem; }
  .site-footer .container { padding-top: 2rem !important; padding-bottom: 2rem !important; }
  .site-footer .col-md-3 { grid-template-columns: 1fr; }
  .site-footer .footer-email { overflow-wrap: anywhere; }
  #courses .course-image { min-height: 190px; background-image: none !important; }
  #courses .course-image img { min-height: 190px; }
}