html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

html {
  position: relative;
  min-height: 100%;
}

body {
  margin-bottom: 60px;
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
  color: var(--bs-secondary-color);
  text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
  text-align: start;
}

/* ── Converter page ──────────────────────────────────────────────────────── */

.converter-header {
  padding: 2rem 0 1rem;
}

.converter-card {
  border: none;
  border-radius: 0.75rem;
  overflow: hidden;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.converter-card:hover {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.12) !important;
  transform: translateY(-2px);
}

.converter-card .card-header {
  padding: 0.75rem 1.25rem;
  border-bottom: 0;
}

.converter-card .card-header h5 {
  font-size: 1rem;
  font-weight: 600;
}

/* Tab navigation */
#converterTabs .nav-link {
  font-weight: 500;
  color: var(--bs-secondary);
  border-radius: 0.5rem 0.5rem 0 0;
  padding: 0.6rem 1rem;
}

#converterTabs .nav-link.active {
  color: var(--bs-primary);
  font-weight: 600;
}

#converterTabs .tab-icon {
  margin-right: 0.25rem;
}

/* File drop zone */
.conv-file {
  cursor: pointer;
}

.conv-file:hover {
  border-color: var(--bs-primary);
  background-color: #f0f7ff;
}

/* Accordion options */
.accordion-button:not(.collapsed) {
  background-color: #f8f9fa;
  color: var(--bs-dark);
  box-shadow: none;
}

/* Convert button */
.conv-btn {
  font-weight: 600;
  letter-spacing: 0.02em;
  min-height: 2.5rem;
}

/* Home page category cards */
.feature-card {
  border-radius: 0.75rem;
  overflow: hidden;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
  text-decoration: none;
  color: inherit;
  display: block;
}

.feature-card:hover {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.12) !important;
  transform: translateY(-3px);
  color: inherit;
}

.feature-card .feature-icon {
  font-size: 2.5rem;
  line-height: 1;
}