/* Certificates page */
.cert-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
@media (max-width: 880px) { .cert-grid { grid-template-columns: 1fr; } }
.cert-card {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.cert-preview {
  position: relative;
  aspect-ratio: 4/3;
  background:
    radial-gradient(circle at 20% 0%, rgba(82,224,255,0.12), transparent 60%),
    linear-gradient(135deg, #0e1426 0%, #0a0f1c 100%);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  cursor: pointer;
}
.cert-preview::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(82,224,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(82,224,255,0.04) 1px, transparent 1px);
  background-size: 18px 18px;
  pointer-events: none;
}
.cert-stamp {
  position: absolute;
  top: 16px; right: 16px;
  width: 78px; height: 78px;
  border: 2px solid var(--cyan);
  border-radius: 50%;
  display: grid; place-items: center;
  background: rgba(82,224,255,0.06);
  backdrop-filter: blur(2px);
  transform: rotate(-12deg);
  box-shadow: 0 0 24px rgba(82,224,255,0.25);
}
.cert-stamp .grade {
  font-family: var(--font-display);
  font-weight: 800;
  color: var(--cyan);
  font-size: 1.6rem;
  line-height: 1;
}
.cert-stamp .label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--cyan);
  letter-spacing: 0.16em;
  margin-top: 2px;
}
.cert-doc {
  position: absolute;
  inset: 28px;
  border: 1px solid rgba(82,224,255,0.2);
  border-radius: 6px;
  padding: 20px;
  background: rgba(255,255,255,0.02);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.cert-doc .title {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--ink-0);
  font-size: 0.95rem;
  line-height: 1.2;
}
.cert-doc .issuer {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: var(--cyan);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.cert-doc .row {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 4px 0;
  border-bottom: 1px dashed rgba(82,224,255,0.15);
}
.cert-doc .row .k { color: var(--ink-3); letter-spacing: 0.06em; }
.cert-doc .row .v { color: var(--ink-1); }

.cert-body { padding: 24px 26px 26px; }
.cert-body h3 { color: var(--ink-0); margin-bottom: 6px; }
.cert-body .issuer { color: var(--cyan); font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; }
.cert-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 16px; }
.cert-actions { display: flex; gap: 8px; margin-top: 18px; }
.cert-actions .btn { padding: 10px 14px; font-size: 0.85rem; }

/* Verify line */
.verify-strip {
  margin-top: 56px;
  padding: 24px 32px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 20px;
  align-items: center;
}
@media (max-width:680px){ .verify-strip{ grid-template-columns: 1fr; } }
.verify-icon {
  width: 44px; height: 44px; border-radius: 8px;
  background: rgba(82,224,255,0.08);
  border: 1px solid rgba(82,224,255,0.3);
  display: grid; place-items: center;
  color: var(--cyan);
}

/* Lightbox */
.cert-modal {
  position: fixed; inset: 0;
  background: rgba(5,8,17,0.88);
  backdrop-filter: blur(8px);
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 32px;
}
.cert-modal-card {
  width: 100%; max-width: 900px;
  max-height: 90vh;
  overflow: auto;
  background: var(--bg-2);
  border: 1px solid var(--line-2);
  border-radius: var(--r-xl);
  position: relative;
}
.cert-modal-close {
  position: absolute; top: 16px; right: 16px;
  width: 36px; height: 36px;
  background: var(--bg-3);
  border: 1px solid var(--line-2);
  border-radius: 8px;
  color: var(--ink-0);
  cursor: pointer;
  display: grid; place-items: center;
  z-index: 2;
}
.cert-modal-close:hover { border-color: var(--cyan); color: var(--cyan); }

.cert-large {
  background:
    radial-gradient(circle at 20% 0%, rgba(82,224,255,0.15), transparent 60%),
    linear-gradient(135deg, #0e1426 0%, #0a0f1c 100%);
  padding: 48px;
  position: relative;
  overflow: hidden;
}
.cert-large::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(82,224,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(82,224,255,0.05) 1px, transparent 1px);
  background-size: 20px 20px;
  pointer-events: none;
}
.cert-large-doc {
  position: relative;
  background: linear-gradient(180deg, #0c1322, #060a14);
  border: 1px solid rgba(82,224,255,0.3);
  border-radius: var(--r-lg);
  padding: 36px 40px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.6), 0 0 0 1px rgba(82,224,255,0.15);
}
.cert-large-doc h2 { color: var(--ink-0); }
.cert-large-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 24px;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px dashed rgba(82,224,255,0.2);
}
@media (max-width:600px){ .cert-large-meta{ grid-template-columns:1fr; } }
.cert-large-meta .row { display: flex; flex-direction: column; gap: 4px; }
.cert-large-meta .k { font-family: var(--font-mono); font-size: 0.7rem; color: var(--ink-3); letter-spacing: 0.12em; text-transform: uppercase; }
.cert-large-meta .v { font-family: var(--font-display); color: var(--ink-0); font-weight: 600; }

/* ============ Mobile (additive) ============ */
@media (max-width: 720px) {
  .cert-card { padding: 20px; }
  .cert-card .btn { min-height: 44px; }
}
@media (max-width: 480px) {
  .cert-card { padding: 16px; }
  .cert-card .btn { width: 100%; justify-content: center; }
}