/* converter.css — MEP Unit Converter page */

/* converter-hero replaced by tool-page-header — see tool-shared.css */

/* ── Category tabs ── */
.converter-categories {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  padding-block: var(--space-3);
  margin-bottom: var(--space-4);
  scrollbar-width: none;
  -ms-overflow-style: none;
  -webkit-overflow-scrolling: touch;
}

.converter-categories::-webkit-scrollbar {
  display: none;
}

.converter-cat-btn {
  flex-shrink: 0;
  padding: 0.4rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: transparent;
  color: var(--text-2);
  font-size: 0.875rem;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.converter-cat-btn:hover {
  color: var(--text-1);
  border-color: var(--text-3);
}

.converter-cat-btn.is-active {
  background: var(--accent);
  color: var(--accent-contrast);
  border-color: var(--accent);
  font-weight: 500;
}

.converter-cat-btn:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

/* ── Converter card ── */
.converter-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: var(--space-5) var(--space-5) var(--space-4);
  margin-bottom: var(--space-5);
}

/* ── Two-column converter layout ── */
.converter-layout {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-4);
  align-items: start;
}

@media (max-width: 40em) {
  .converter-layout {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
}

/* ── Input / Output side ── */
.converter-side {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.converter-side__label {
  font-size: 0.8rem;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
}

.converter-input {
  width: 100%;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  background: var(--bg-page);
  color: var(--text-1);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  -moz-appearance: textfield;
}

.converter-input::-webkit-outer-spin-button,
.converter-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.converter-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(126, 169, 164, 0.18);
  outline: none;
}

.converter-result {
  width: 100%;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  background: var(--bg-section);
  color: var(--accent);
  min-height: 3.2rem;
  display: flex;
  align-items: center;
  word-break: break-all;
  user-select: all;
  cursor: text;
}

.converter-select {
  width: 100%;
  padding: 0.5rem 0.75rem;
  font-size: 0.95rem;
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  background: var(--bg-page);
  color: var(--text-1);
  cursor: pointer;
  transition: border-color 0.15s ease;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' stroke='%23a7a39d' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2rem;
}

.converter-select:focus {
  border-color: var(--accent);
  outline: none;
  box-shadow: 0 0 0 3px rgba(126, 169, 164, 0.18);
}

/* ── Swap button ── */
.converter-swap-col {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 1.5rem;
}

@media (max-width: 40em) {
  .converter-swap-col {
    padding-top: 0;
    justify-content: center;
  }
}

.converter-swap {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border-subtle);
  background: var(--bg-section);
  color: var(--accent);
  font-size: 1.2rem;
  cursor: pointer;
  transition: transform 0.3s ease, background 0.15s ease, border-color 0.15s ease;
  flex-shrink: 0;
}

.converter-swap:hover {
  background: var(--accent);
  color: var(--accent-contrast);
  border-color: var(--accent);
  transform: rotate(180deg);
}

.converter-swap:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 3px;
}

/* ── Formula display ── */
.converter-formula {
  text-align: center;
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-subtle);
  color: var(--text-3);
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
}

.converter-formula strong {
  color: var(--text-2);
  font-weight: 500;
}

/* ── Quick reference table ── */
.converter-ref {
  margin-top: var(--space-5);
}

.converter-ref h2 {
  font-size: 1.15rem;
  margin-bottom: var(--space-3);
  color: var(--text-1);
}

.converter-ref-table {
  width: 100%;
  border-collapse: collapse;
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
}

.converter-ref-table th,
.converter-ref-table td {
  text-align: left;
  padding: 0.6rem 0.85rem;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.9rem;
}

.converter-ref-table th {
  font-weight: 600;
  color: var(--text-1);
  background: var(--bg-section);
}

.converter-ref-table td {
  color: var(--text-2);
  font-variant-numeric: tabular-nums;
}

.converter-ref-table tr:nth-child(even) td {
  background: rgba(255, 255, 255, 0.015);
}

.converter-ref-table tr:last-child td {
  border-bottom: none;
}

.converter-ref-table .ref-val {
  color: var(--accent);
  font-weight: 500;
}

/* ── Bottom CTA ── */
.converter-cta {
  text-align: center;
  padding: var(--space-6) var(--space-4);
  margin-top: var(--space-4);
  background: var(--bg-section);
  border-radius: 14px;
  border: 1px solid var(--border-subtle);
}

.converter-cta p {
  max-width: 42rem;
  margin: 0 auto var(--space-4);
  color: var(--text-2);
  font-size: 1.05rem;
  line-height: 1.55;
}

.converter-cta-buttons {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Responsive tweaks ── */
@media (max-width: 40em) {
  .converter-card {
    padding: var(--space-4) var(--space-3);
  }

  .converter-select {
    font-size: 1rem;
  }

  .converter-ref-table {
    font-size: 0.85rem;
  }

  .converter-ref-table th,
  .converter-ref-table td {
    padding: 0.5rem 0.65rem;
  }
}

/* ── Print ── */
@media print {
  .converter-categories,
  .converter-swap,
  .converter-cta {
    display: none;
  }
}