.certificates-section {
  min-height: 320px;
}

.certificate-history-section {
  min-height: 220px;
}

.certificate-vault-toolbar {
  display: flex;
  gap: 14px;
  align-items: end;
  justify-content: space-between;
  margin: 18px 0 20px;
}

.certificate-vault-search,
.certificate-vault-filter {
  display: grid;
  gap: 7px;
}

.certificate-vault-search {
  flex: 1 1 360px;
}

.certificate-vault-filter {
  flex: 0 0 220px;
}

.certificate-vault-search span,
.certificate-vault-filter span {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  opacity: 0.82;
}

.certificate-vault-search input,
.certificate-vault-filter select {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 16px;
  padding: 12px 14px;
  background: rgba(8, 14, 31, 0.36);
  color: #fff;
  font: inherit;
}

.certificate-vault-summary {
  margin: 0 0 18px;
  font-size: 13px;
  font-weight: 700;
  opacity: 0.84;
}

.certificate-vault-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.certificate-vault-card {
  position: relative;
  overflow: hidden;
  border-radius: 22px;
  padding: 22px;
  background:
    radial-gradient(circle at top right, rgba(0, 229, 255, 0.12), transparent 32%),
    linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.04));
  border: 1px solid rgba(255,255,255,0.1);
  box-shadow: 0 14px 30px rgba(0,0,0,0.16);
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: transform 0.28s ease, box-shadow 0.3s ease, filter 0.25s ease;
}

.certificate-vault-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 36px rgba(0,0,0,0.2);
}

.certificate-vault-card.locked {
  opacity: 0.68;
  filter: saturate(0.85);
}

.certificate-vault-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.certificate-vault-badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.12);
}

.certificate-vault-badge.unlocked {
  color: #08111f;
  background: linear-gradient(135deg,#00e5ff,#32ffc7);
  border: none;
}

.certificate-vault-badge.locked {
  color: #f4dbe6;
  background: rgba(255, 94, 125, 0.14);
  border-color: rgba(255, 94, 125, 0.18);
}

.certificate-vault-progress-label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  font-weight: 700;
  opacity: 0.76;
}

.certificate-vault-mark {
  width: 54px;
  height: 54px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  background: rgba(255,255,255,0.08);
}

.certificate-vault-copy h4 {
  margin: 0 0 8px;
  font-size: 25px;
  line-height: 1.18;
}

.certificate-vault-copy p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  opacity: 0.86;
}

.certificate-progress {
  display: grid;
  gap: 10px;
}

.certificate-progress-track {
  height: 10px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255,255,255,0.08);
}

.certificate-progress-track span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(135deg, #00e5ff, #32ffc7, #ff4da6);
  box-shadow: 0 0 18px rgba(50,255,199,0.22);
}

.certificate-step-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.certificate-step {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 9px;
  border-radius: 999px;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.08);
  font-size: 11px;
  font-weight: 800;
  opacity: 0.78;
}

.certificate-step.done {
  color: #08111f;
  background: linear-gradient(135deg,#00e5ff,#32ffc7);
  border-color: transparent;
  opacity: 1;
}

.certificate-vault-meta {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.certificate-vault-meta-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  opacity: 0.92;
}

.certificate-vault-meta-row strong {
  text-align: right;
}

.certificate-vault-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: auto;
}

.certificate-vault-btn {
  border: none;
  border-radius: 12px;
  padding: 11px 14px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  background: rgba(255,255,255,0.08);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.1);
  transition: transform 0.2s ease, filter 0.2s ease, box-shadow 0.2s ease;
}

.certificate-vault-btn.primary {
  color: #08111f;
  background: linear-gradient(135deg,#00e5ff,#32ffc7);
  border: none;
}

.certificate-vault-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  filter: brightness(1.04);
}

.certificate-vault-btn:disabled {
  cursor: not-allowed;
  opacity: 0.5;
  transform: none;
}

.certificate-vault-empty {
  padding: 32px 24px;
  border-radius: 20px;
  text-align: center;
  background: rgba(255,255,255,0.05);
  border: 1px dashed rgba(255,255,255,0.14);
}

.certificate-vault-empty h4 {
  margin: 0 0 8px;
  font-size: 22px;
}

.certificate-vault-empty p {
  margin: 0;
  opacity: 0.82;
}

.certificate-history-list {
  display: grid;
  gap: 14px;
}

.certificate-history-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  border-radius: 20px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
}

.certificate-history-index {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 800;
  background: linear-gradient(135deg,#00e5ff,#32ffc7);
  color: #08111f;
}

.certificate-history-copy h4 {
  margin: 0 0 6px;
  font-size: 18px;
}

.certificate-history-copy p {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  opacity: 0.82;
}

.certificate-history-meta {
  display: grid;
  gap: 6px;
  justify-items: end;
  text-align: right;
  font-size: 12px;
  opacity: 0.9;
}

.certificate-history-meta strong {
  font-size: 13px;
}

.certificate-history-empty {
  padding: 28px 24px;
  border-radius: 20px;
  text-align: center;
  background: rgba(255,255,255,0.05);
  border: 1px dashed rgba(255,255,255,0.14);
}

.certificate-history-empty h4 {
  margin: 0 0 8px;
  font-size: 20px;
}

.certificate-history-empty p {
  margin: 0;
  opacity: 0.82;
}

body.light-mode .certificate-vault-card {
  background:
    radial-gradient(circle at top right, rgba(0, 229, 255, 0.08), transparent 32%),
    linear-gradient(180deg, rgba(255,255,255,0.92), rgba(255,255,255,0.88));
  border-color: rgba(17,24,39,0.06);
  color: #1a2146;
}

body.light-mode .certificate-vault-search input,
body.light-mode .certificate-vault-filter select {
  background: rgba(17,24,39,0.04);
  border-color: rgba(17,24,39,0.08);
  color: #1a2146;
}

body.light-mode .certificate-vault-copy p,
body.light-mode .certificate-vault-meta-row {
  color: rgba(26,33,70,0.82);
}

body.light-mode .certificate-vault-summary {
  color: rgba(26,33,70,0.82);
}

body.light-mode .certificate-vault-badge {
  background: rgba(17,24,39,0.06);
  border-color: rgba(17,24,39,0.08);
  color: #352e69;
}

body.light-mode .certificate-vault-badge.locked {
  background: rgba(255, 94, 125, 0.08);
  border-color: rgba(255, 94, 125, 0.14);
  color: #b23b62;
}

body.light-mode .certificate-progress-track,
body.light-mode .certificate-step {
  background: rgba(17,24,39,0.05);
  border-color: rgba(17,24,39,0.08);
}

body.light-mode .certificate-vault-btn {
  background: rgba(17,24,39,0.05);
  border-color: rgba(17,24,39,0.08);
  color: #261f56;
}

body.light-mode .certificate-vault-btn.primary {
  color: #08111f;
}

body.light-mode .certificate-vault-empty {
  background: rgba(255,255,255,0.7);
  border-color: rgba(17,24,39,0.1);
  color: #1a2146;
}

body.light-mode .certificate-history-card {
  background: rgba(255,255,255,0.72);
  border-color: rgba(17,24,39,0.06);
  color: #1a2146;
}

body.light-mode .certificate-history-copy p,
body.light-mode .certificate-history-meta {
  color: rgba(26,33,70,0.82);
}

body.light-mode .certificate-history-empty {
  background: rgba(255,255,255,0.7);
  border-color: rgba(17,24,39,0.1);
  color: #1a2146;
}

@media (max-width: 1080px) {
  .certificate-vault-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .certificate-vault-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .certificate-vault-filter {
    flex-basis: auto;
  }

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

  .certificate-vault-actions {
    flex-direction: column;
  }

  .certificate-history-card {
    grid-template-columns: 1fr;
    justify-items: start;
    text-align: left;
  }

  .certificate-history-meta {
    justify-items: start;
    text-align: left;
  }

  .certificate-vault-btn {
    width: 100%;
  }
}