.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.upload-pack,
.upload-inline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 18px;
  color: var(--navy);
  background: var(--white);
  font-weight: 850;
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.upload-pack:hover,
.upload-inline:hover {
  transform: translateY(-2px);
  border-color: var(--aqua);
  box-shadow: 0 10px 28px rgba(7, 29, 54, 0.1);
}

.upload-pack svg {
  width: 18px;
  height: 18px;
}

.source-panel {
  margin: 24px 0 0;
  padding: 28px;
  border: 1px solid rgba(149, 184, 204, 0.45);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 16px 44px rgba(7, 29, 54, 0.07);
}

.source-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
}

.source-heading .eyebrow {
  margin-bottom: 8px;
  color: var(--orange);
}

.source-heading h2 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(1.45rem, 2.5vw, 2.2rem);
  letter-spacing: -0.04em;
}

.source-heading p {
  margin: 8px 0 0;
  max-width: 700px;
  color: #607585;
  line-height: 1.5;
}

.upload-inline {
  flex: 0 0 auto;
  color: var(--white);
  border-color: var(--navy);
  background: var(--navy);
}

.source-list {
  display: grid;
  gap: 10px;
}

.source-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 14px;
  min-height: 76px;
  padding: 13px 15px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--cream);
}

.source-row.is-disabled {
  opacity: 0.62;
}

.source-toggle {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
}

.source-toggle input {
  width: 22px;
  height: 22px;
  accent-color: var(--aqua);
  cursor: pointer;
}

.source-name {
  min-width: 0;
}

.source-name strong {
  display: block;
  overflow: hidden;
  color: var(--navy);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.source-name span {
  display: block;
  margin-top: 4px;
  color: #607585;
  font-size: 0.82rem;
}

.source-count {
  border-radius: 999px;
  padding: 8px 11px;
  color: var(--navy);
  background: rgba(9, 212, 200, 0.22);
  font-size: 0.75rem;
  font-weight: 900;
  white-space: nowrap;
}

.source-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 13px;
  color: var(--navy);
  background: var(--white);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 850;
}

.drop-zone {
  display: grid;
  place-items: center;
  gap: 5px;
  min-height: 104px;
  margin-top: 14px;
  padding: 18px;
  border: 2px dashed var(--sky);
  border-radius: 18px;
  color: var(--navy);
  background: rgba(149, 184, 204, 0.1);
  text-align: center;
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.drop-zone:hover,
.drop-zone.is-over {
  border-color: var(--aqua);
  background: rgba(9, 212, 200, 0.12);
  transform: translateY(-1px);
}

.drop-zone span {
  color: #607585;
  font-size: 0.88rem;
}

.upload-status {
  min-height: 20px;
  margin: 10px 2px 0;
  color: #496272;
  font-size: 0.88rem;
  font-weight: 750;
}

.upload-status.is-error {
  color: #b23c22;
}

.content-card .source-chip {
  display: inline-flex;
  align-items: center;
  max-width: 230px;
  overflow: hidden;
  border-radius: 999px;
  padding: 7px 10px;
  color: #526a7b;
  background: var(--cream);
  font-size: 0.72rem;
  font-weight: 800;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.button[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.5;
  pointer-events: none;
}

@media (max-width: 760px) {
  .topbar-actions {
    gap: 7px;
  }

  .upload-pack span,
  .download-all span {
    display: none;
  }

  .upload-pack,
  .download-all {
    width: 46px;
    padding: 0;
  }

  .source-panel {
    padding: 22px 18px;
  }

  .source-heading {
    flex-direction: column;
  }

  .source-row {
    grid-template-columns: auto minmax(0, 1fr) auto;
  }

  .source-download {
    grid-column: 2 / -1;
    justify-self: start;
  }
}