:root {
  --navy: #0b2341;
  --navy-light: #173a63;
  --yellow: #ffc91a;
  --yellow-dark: #d9a500;
  --ink: #17202a;
  --muted: #627080;
  --line: #dce2e7;
  --white: #fff;
  color: var(--ink);
  background: var(--white);
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background: var(--white);
}

a {
  color: inherit;
}

button {
  font: inherit;
  outline-offset: 3px;
}

:focus-visible {
  outline: 3px solid rgba(255, 201, 26, 0.75);
}

.skip-link {
  position: fixed;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 30;
  padding: 0.7rem 1rem;
  color: var(--navy);
  background: var(--yellow);
  font-weight: 800;
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  min-height: 82px;
  padding: 0.9rem max(1rem, calc((100% - 1240px) / 2));
  color: var(--white);
  background: rgba(11, 35, 65, 0.97);
  box-shadow: 0 8px 24px rgba(11, 35, 65, 0.16);
  backdrop-filter: blur(10px);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
}

.wordmark > span {
  display: grid;
  width: 44px;
  height: 44px;
  border: 4px solid var(--yellow);
  border-radius: 50%;
  color: transparent;
  place-items: center;
}

.wordmark strong {
  color: var(--white);
  font-size: 1.4rem;
  letter-spacing: 0.08em;
}

.site-header nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 1.2rem;
}

.site-header nav a {
  color: var(--white);
  font-size: 0.84rem;
  font-weight: 750;
  text-decoration: none;
}

.site-header nav a:hover,
.site-header nav a[aria-current="page"] {
  color: var(--yellow);
}

main {
  min-height: calc(100vh - 170px);
}

.eyebrow {
  margin: 0 0 0.55rem;
  color: var(--yellow-dark);
  font-size: 0.75rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.certificates-hero {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 3rem;
  padding:
    clamp(4rem, 9vw, 8rem)
    max(1rem, calc((100% - 1240px) / 2))
    clamp(3rem, 6vw, 5rem);
  color: var(--white);
  background:
    linear-gradient(118deg, rgba(11, 35, 65, 0.98), rgba(23, 58, 99, 0.91)),
    repeating-linear-gradient(
      -45deg,
      transparent 0,
      transparent 28px,
      rgba(255, 255, 255, 0.04) 28px,
      rgba(255, 255, 255, 0.04) 30px
    );
}

.certificates-hero > div {
  max-width: 760px;
}

.certificates-hero h1 {
  margin: 0;
  font-size: clamp(2.8rem, 7vw, 5.8rem);
  line-height: 0.95;
  letter-spacing: -0.055em;
}

.certificates-hero p:last-child {
  max-width: 690px;
  margin: 1.5rem 0 0;
  color: #d7e0e9;
  font-size: clamp(1rem, 2vw, 1.2rem);
  line-height: 1.7;
}

.certificates-hero > strong {
  flex: 0 0 auto;
  padding: 1rem 1.2rem;
  border-left: 5px solid var(--yellow);
  font-size: 1rem;
}

.certificates-list {
  width: min(calc(100% - 2rem), 1240px);
  margin: 0 auto;
  padding: clamp(3rem, 6vw, 5.5rem) 0;
}

.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2rem;
}

.section-heading h2 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(1.8rem, 4vw, 3.2rem);
  letter-spacing: -0.035em;
}

.section-heading > p {
  max-width: 440px;
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 700;
  line-height: 1.6;
}

.certificate-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: start;
  gap: clamp(1.2rem, 2.5vw, 2rem);
}

.certificate-card {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--white);
  box-shadow: 0 12px 36px rgba(11, 35, 65, 0.08);
  transition:
    box-shadow 160ms ease,
    transform 160ms ease;
}

.certificate-card:hover,
.certificate-card:focus-within {
  box-shadow: 0 18px 42px rgba(11, 35, 65, 0.15);
  transform: translateY(-4px);
}

.certificate-card__document {
  position: relative;
  display: grid;
  width: 100%;
  padding: 1rem;
  overflow: hidden;
  aspect-ratio: 1 / 1.4142;
  border: 0;
  color: var(--white);
  background: linear-gradient(145deg, #e9edf0, #f7f8f9);
  cursor: zoom-in;
  place-items: center;
}

.certificate-card__document img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 12px 18px rgba(11, 35, 65, 0.14));
  transition: transform 220ms ease;
}

.certificate-card:hover .certificate-card__document img {
  transform: scale(1.018);
}

.certificate-card__document span {
  position: absolute;
  right: 0.7rem;
  bottom: 0.7rem;
  padding: 0.4rem 0.6rem;
  border-radius: 999px;
  background: rgba(11, 35, 65, 0.9);
  font-size: 0.68rem;
  font-weight: 800;
}

.certificate-card__content {
  min-height: 108px;
  padding: 1.1rem;
  border-top: 1px solid var(--line);
}

.certificate-card__content p {
  margin: 0 0 0.35rem;
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 750;
}

.certificate-card__content h2 {
  margin: 0;
  overflow-wrap: anywhere;
  color: var(--navy);
  font-size: 1.05rem;
  line-height: 1.35;
}

.certificate-dialog {
  width: min(calc(100% - 2rem), 1080px);
  height: min(calc(100vh - 2rem), 920px);
  padding: 0;
  border: 0;
  border-radius: 14px;
  color: var(--ink);
  background: transparent;
}

.certificate-dialog::backdrop {
  background: rgba(4, 13, 24, 0.84);
  backdrop-filter: blur(3px);
}

.certificate-dialog__panel {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  height: 100%;
  overflow: hidden;
  border-radius: 14px;
  background: var(--white);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.38);
}

.certificate-dialog__heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.2rem;
  color: var(--white);
  background: var(--navy);
}

.certificate-dialog__heading h2 {
  margin: 0;
  font-size: clamp(1.2rem, 3vw, 1.8rem);
}

.certificate-dialog__heading p:last-child {
  margin: 0.35rem 0 0;
  color: #d6e0e8;
  font-size: 0.8rem;
}

.certificate-dialog__heading button,
.certificate-dialog__nav {
  min-width: 48px;
  min-height: 48px;
  border: 1px solid var(--white);
  border-radius: 999px;
  color: var(--navy);
  background: var(--white);
  font-weight: 850;
  cursor: pointer;
}

.certificate-dialog__heading button {
  padding: 0.65rem 1rem;
  border-radius: 7px;
}

.certificate-dialog__heading button:hover,
.certificate-dialog__nav:hover {
  border-color: var(--yellow);
  background: var(--yellow);
}

.certificate-dialog__panel figure {
  position: relative;
  display: grid;
  min-height: 0;
  margin: 0;
  overflow: hidden;
  background: #e6eaed;
  place-items: center;
}

.certificate-dialog__panel figure > img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 0;
  padding: 1.2rem 5.5rem;
  object-fit: contain;
}

.certificate-dialog__nav {
  position: absolute;
  top: 50%;
  z-index: 2;
  display: grid;
  width: 54px;
  height: 54px;
  padding: 0;
  box-shadow: 0 5px 20px rgba(11, 35, 65, 0.25);
  transform: translateY(-50%);
  place-items: center;
}

.certificate-dialog__nav span {
  font-size: 2rem;
  line-height: 1;
  transform: translateY(-0.08em);
}

.certificate-dialog__nav--previous {
  left: 1rem;
}

.certificate-dialog__nav--next {
  right: 1rem;
}

.certificate-dialog__nav:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.6rem 1.4rem;
  min-height: 90px;
  padding: 1.5rem;
  color: #d4dee7;
  background: var(--navy);
  font-size: 0.8rem;
}

.site-footer strong {
  color: var(--white);
}

.site-footer a {
  color: var(--yellow);
  font-weight: 750;
}

@media (max-width: 960px) {
  .certificate-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    gap: 0.8rem;
  }

  .site-header nav {
    justify-content: flex-start;
  }

  .certificates-hero,
  .section-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .certificates-hero {
    gap: 2rem;
  }

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

  .certificate-dialog {
    width: 100%;
    height: 100%;
    max-width: none;
    max-height: none;
    border-radius: 0;
  }

  .certificate-dialog__panel {
    border-radius: 0;
  }

  .certificate-dialog__heading {
    align-items: flex-start;
  }

  .certificate-dialog__panel figure > img {
    padding: 0.8rem 3.6rem;
  }

  .certificate-dialog__nav {
    width: 46px;
    height: 46px;
  }

  .certificate-dialog__nav--previous {
    left: 0.45rem;
  }

  .certificate-dialog__nav--next {
    right: 0.45rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}