/* ==========================================================================
   Components — header, menu, buttons, section heads, cards, logo strip, footer
   ========================================================================== */

/* Buttons --------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 4.375rem;
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-pill);
  background: var(--blue-87);
  color: var(--white);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--fs-button);
  line-height: 1.25rem;
  white-space: nowrap;
  transition: background-color 200ms ease, transform 200ms var(--ease-out);
}

.btn:hover {
  background: #2f78c2;
}

.btn:active {
  transform: scale(0.97);
}

@media (min-width: 900px) {
  .btn {
    height: 2.75rem;
    padding: 0.75rem 1.375rem;
  }
}

.cta {
  display: flex;
  justify-content: center;
}

/* Header ---------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--white);
  box-shadow: var(--shadow-header);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  padding-block: 0.375rem;
}

.site-header__logo {
  display: flex;
  align-items: center;
  padding-inline: 0.375rem;
}

.site-header__logo img {
  width: 2.9375rem;
  height: 3.125rem;
}

.site-nav {
  display: none;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 1.125rem;
  height: 100%;
}

.site-header__actions .btn {
  font-size: 0.875rem;
}

.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-width: 2.75rem;
  padding: 0.25rem 1rem;
}

.menu-toggle img {
  width: 0.7875rem;
  height: auto;
}

.menu-toggle .icon-close {
  display: none;
}

.menu-open .menu-toggle .icon-open {
  display: none;
}

.menu-open .menu-toggle .icon-close {
  display: block;
}

@media (max-width: 899.98px) {
  .site-header__inner {
    width: 100%;
  }
}

@media (min-width: 900px) {
  .site-header__inner {
    padding-block: 0.75rem;
  }

  .site-header__logo {
    width: 9.4375rem;
    padding-inline: 0;
  }

  .site-header__logo img {
    width: 3.8125rem;
    height: 4rem;
  }

  .site-nav {
    display: flex;
    align-self: stretch;
    gap: 0.5rem;
  }

  .site-nav a {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 0 1 9.375rem;
    min-width: 0;
    padding-inline: 0.5rem;
    font-family: var(--font-display);
    font-weight: 500;
    font-size: var(--fs-nav);
    line-height: 1.2;
    color: var(--black-87);
    opacity: 0.8;
    text-align: center;
    white-space: nowrap;
    transition: opacity 200ms ease;
  }

  .site-nav a:hover,
  .site-nav a[aria-current="page"] {
    opacity: 1;
  }

  .site-header__actions .btn {
    font-size: 1.125rem;
  }

  .menu-toggle,
  .mobile-menu {
    display: none !important;
  }
}

@media (min-width: 900px) and (max-width: 1099.98px) {
  .site-nav {
    gap: 0.25rem;
  }

  .site-nav a {
    flex: none;
    padding-inline: 0.75rem;
  }
}

@media (min-width: 1100px) {
  .site-nav a {
    width: 9.375rem;
  }
}

/* Mobile menu ----------------------------------------------------------- */

.mobile-menu {
  position: fixed;
  inset: var(--header-h) 0 0;
  z-index: 40;
  padding: 1.125rem 1.5rem;
  background: var(--white);
  overflow-y: auto;
}

.mobile-menu[hidden] {
  display: none;
}

.mobile-menu a {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  height: 3rem;
  font-weight: 600;
  font-size: var(--fs-menu);
  color: var(--black);
  text-align: right;
}

.mobile-menu a[aria-current="page"] {
  color: var(--black-87);
  opacity: 0.8;
}

@media (prefers-reduced-motion: no-preference) {
  .mobile-menu:not([hidden]) {
    animation: menu-in 300ms var(--ease-out);
  }
}

@keyframes menu-in {
  from {
    opacity: 0;
    transform: translateY(-0.5rem);
  }
}

.menu-open {
  overflow: hidden;
}

/* Section head (title + subtitle) -------------------------------------- */

.section-head {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  text-align: center;
}

@media (min-width: 900px) {
  .section-head {
    gap: 1.5rem;
  }
}

/* Certification card ---------------------------------------------------- */

.cards {
  display: grid;
  gap: 1.5rem;
  padding-inline: 1rem;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 2.1875rem 1.6875rem;
  border: 0.4px solid var(--border-card);
  border-radius: var(--radius-card);
  background: var(--white);
  box-shadow: var(--shadow-card-m);
  overflow: clip;
}

.card__picture {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 7.5rem;
  padding: 0.625rem;
}

.card__picture img {
  width: 4.25rem;
  height: auto;
}

.card__title {
  font-weight: 600;
  font-size: var(--fs-h3);
  color: var(--black-87);
}

.card__text {
  margin-top: 0.75rem;
  font-size: var(--fs-text-alt);
  color: var(--black-68);
}

@media (min-width: 900px) {
  .cards {
    grid-template-columns: repeat(2, minmax(0, 28.5rem));
    justify-content: center;
    gap: clamp(1.75rem, 7vw - 1.875rem, 4.375rem);
    padding-inline: 0;
  }

  .card {
    gap: 2.625rem;
    min-height: 34.4375rem;
    box-shadow: none;
    filter: drop-shadow(var(--shadow-card));
  }

  .card__picture {
    height: 15rem;
  }

  .card__picture img {
    width: 5.625rem;
  }

  .card__text {
    margin-top: 1.5rem;
  }
}

/* Logo strip (marquee with faded edges) -------------------------------- */

.logo-strip {
  --tile: clamp(3.5rem, 3.5rem + 44 * (100vw - 24.375rem) / 910, 6.25rem);
  --tile-gap: clamp(1rem, 1rem + 24 * (100vw - 24.375rem) / 910, 2.5rem);
  width: min(91.1875rem, 100vw);
  margin-inline: auto;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(to right, transparent 0, transparent 7%, #000 33%, #000 72%, transparent 94%, transparent 100%);
  mask-image: linear-gradient(to right, transparent 0, transparent 7%, #000 33%, #000 72%, transparent 94%, transparent 100%);
}

.logo-strip__track {
  display: flex;
  gap: var(--tile-gap);
  width: max-content;
  padding-block: calc(var(--tile) * 0.21);
}

.logo-strip__track img {
  width: var(--tile);
  height: var(--tile);
  flex: none;
}

@media (prefers-reduced-motion: no-preference) {
  .logo-strip.is-animated .logo-strip__track {
    animation: marquee 70s linear infinite;
  }

  .logo-strip.is-animated:hover .logo-strip__track {
    animation-play-state: paused;
  }
}

.logo-strip:not(.is-animated) .logo-strip__track {
  margin-inline: auto;
}

@keyframes marquee {
  to {
    transform: translateX(calc(-50% - var(--tile-gap) / 2));
  }
}

/* Footer ---------------------------------------------------------------- */

.site-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.375rem;
  padding-block: 0.125rem 0.5rem;
  background: var(--white);
}

.site-footer__logo img {
  width: 5.375rem;
  height: auto;
}

.site-footer__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  width: min(var(--footer-max), 100% - 2 * var(--gutter));
  font-size: var(--fs-footer);
}

.site-footer__copy {
  padding-block: 0.125rem;
  color: var(--black-87);
  text-align: center;
  white-space: pre-wrap;
}

.site-footer__links {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  margin: 0;
  padding: 0.125rem 0;
  list-style: none;
}

.site-footer__links li {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.site-footer__links li + li::before {
  content: "";
  width: 0.6px;
  height: 0.375rem;
  background: var(--black-54);
}

.site-footer__links a {
  color: var(--black-54);
  white-space: nowrap;
  transition: color 200ms ease;
}

.site-footer__links a:hover {
  color: var(--black-87);
}

@media (min-width: 900px) {
  .site-footer {
    gap: 1rem;
    padding-block: 0.75rem;
  }

  .site-footer__logo img {
    width: 12.5rem;
  }

  .site-footer__content {
    flex-direction: row-reverse;
    justify-content: space-between;
    align-items: flex-start;
    padding-top: 1.375rem;
    border-top: 1px solid var(--black-12);
    padding-block-end: 0.375rem;
  }

  .site-footer__links {
    gap: 0.75rem;
  }

  .site-footer__links li {
    gap: 0.75rem;
  }

  .site-footer__links li + li::before {
    height: 0.75rem;
  }
}