.credentials-page {
  background:
    radial-gradient(circle at 8% 5%, rgba(201, 255, 69, 0.06), transparent 24rem),
    radial-gradient(circle at 92% 25%, rgba(106, 228, 218, 0.05), transparent 26rem),
    var(--bg);
}

.credentials-main {
  min-height: 100vh;
  padding-top: 78px;
}

.credentials-hero {
  position: relative;
  overflow: hidden;
  padding: 8rem 0 5rem;
  border-bottom: 1px solid var(--line-strong);
}

.credentials-hero::before {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  content: "";
  opacity: 0.32;
  pointer-events: none;
}

.credentials-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.65fr);
  align-items: end;
  gap: 4rem;
}

.credentials-hero h1 {
  max-width: 900px;
  margin: 0;
  color: var(--text);
  font-family: var(--font-display);
  font-size: clamp(3.2rem, 7vw, 7rem);
  letter-spacing: -0.065em;
  line-height: 0.95;
}

.credentials-hero h1 span {
  display: block;
  color: var(--acid);
}

.credentials-lead {
  max-width: 720px;
  margin: 2rem 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.5vw, 1.18rem);
  line-height: 1.8;
}

.credentials-summary {
  border-top: 1px solid var(--line-strong);
}

.credentials-summary div {
  display: grid;
  grid-template-columns: 78px 1fr;
  align-items: center;
  min-height: 82px;
  border-bottom: 1px solid var(--line-strong);
}

.credentials-summary span {
  color: var(--acid);
  font-family: var(--font-mono);
  font-size: 1rem;
}

.credentials-summary strong {
  color: var(--text);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 500;
}

.credentials-section {
  padding: 6.5rem 0;
  border-bottom: 1px solid var(--line-strong);
}

.credentials-section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.55fr);
  gap: 4rem;
  margin-bottom: 3rem;
}

.credentials-section-heading h2 {
  max-width: 780px;
  margin: 0;
  color: var(--text);
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 4rem);
  letter-spacing: -0.05em;
  line-height: 1.05;
}

.credentials-section-heading > p {
  align-self: end;
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.credential-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.4rem;
}

.credential-card {
  display: flex;
  min-width: 0;
  overflow: hidden;
  flex-direction: column;
  border: 1px solid var(--line-strong);
  background: rgba(12, 16, 12, 0.82);
  transition:
    border-color 180ms ease,
    box-shadow 220ms ease,
    transform 220ms var(--ease);
}

.credential-card:hover {
  border-color: rgba(201, 255, 69, 0.52);
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.26);
  transform: translateY(-4px);
}

.credential-preview-link {
  display: flex;
  width: 100%;
  min-height: 330px;
  align-items: center;
  justify-content: center;
  padding: 12px;
  overflow: hidden;
  border-bottom: 1px solid var(--line-strong);
  background: #f4f4f3;
  text-decoration: none;
}

.certificate-image {
  display: block;
  width: 100%;
  height: 100%;
  max-height: 390px;
  object-fit: contain;
  object-position: center;
  background: #fff;
  transition: transform 300ms var(--ease);
}

.credential-card:hover .certificate-image {
  transform: scale(1.012);
}

.credential-content {
  display: flex;
  min-height: 320px;
  flex: 1;
  flex-direction: column;
  padding: clamp(1.5rem, 3vw, 2.15rem);
}

.credential-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.credential-meta span {
  padding: 0.42rem 0.62rem;
  border: 1px solid var(--line-strong);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.credential-content h3 {
  margin: 0;
  color: var(--text);
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 2.6vw, 2.45rem);
  letter-spacing: -0.04em;
  line-height: 1.08;
}

.credential-issuer {
  margin: 0.75rem 0 0;
  color: var(--acid);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.credential-date {
  margin: 0.55rem 0 0;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

.credential-description {
  margin: 1.35rem 0 1.8rem;
  color: var(--muted);
  line-height: 1.75;
}

.credential-link {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-decoration: none;
  text-transform: uppercase;
}

.credential-link span:last-child {
  color: var(--acid);
  font-size: 1rem;
  transition: transform 180ms ease;
}

.credential-link:hover span:last-child {
  transform: translate(3px, -3px);
}

.academic-note {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  align-items: center;
  gap: 2rem;
  padding: 2rem;
  border: 1px solid var(--line-strong);
  background: rgba(12, 16, 12, 0.82);
}

.academic-note-index {
  color: var(--acid);
  font-family: var(--font-mono);
  font-size: 1.2rem;
}

.academic-note h2 {
  margin: 0;
  color: var(--text);
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.5rem);
}

.academic-note p {
  margin: 0.65rem 0 0;
  color: var(--muted);
}

.back-link {
  color: var(--acid);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.credentials-footer {
  padding: 2rem 0;
}

.credentials-footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
}

.credentials-footer a {
  color: var(--acid);
  text-decoration: none;
}

@media (max-width: 900px) {
  .credentials-hero-inner,
  .credentials-section-heading {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .credentials-summary {
    max-width: 520px;
  }

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

  .credential-preview-link {
    min-height: 360px;
  }

  .certificate-image {
    max-height: 430px;
  }
}

@media (max-width: 620px) {
  .credentials-main {
    padding-top: 66px;
  }

  .credentials-hero {
    padding: 5.5rem 0 3.5rem;
  }

  .credentials-section {
    padding: 4.5rem 0;
  }

  .credential-preview-link {
    min-height: 230px;
    padding: 7px;
  }

  .certificate-image {
    max-height: 300px;
  }

  .credential-content {
    min-height: 0;
    padding: 1.35rem;
  }

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

  .credentials-footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}