:root {
  --brand-color: #0d6efd;
  --surface: #ffffff;
  --bg: #f6f9fc;
}

body {
  background: var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", Roboto, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

.hero {
  background: linear-gradient(180deg, #ffffff 0%, transparent 100%);
  border-radius: 1rem;
}

.tool-card {
  transition: transform .15s ease, box-shadow .15s ease;
  background: var(--surface);
}
.tool-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 .5rem 1.25rem rgba(13, 110, 253, .12) !important;
}
.tool-card-link { color: inherit; }
.tool-card-link:hover { color: inherit; }

.tool-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: .6rem;
  font-size: 1.1rem;
}

.dropzone {
  background: #fafbff;
  transition: background .15s ease, border-color .15s ease;
}

.file-item .grip {
  cursor: grab;
  color: #adb5bd;
}

/* tool page right column spacing on small screens */
@media (max-width: 991.98px) {
  main .col-lg-4 { margin-top: 1rem; }
}