/* ===== Calculators hub & tools ===== */

.calc-hub { padding-bottom: 2rem; }

.calc-search-wrap {
  max-width: 420px;
  margin: 0 auto 1.25rem;
}

.calc-search {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font);
  font-size: 1rem;
}

.calc-search:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(201, 162, 39, 0.15);
}

.calc-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  justify-content: center;
  margin-bottom: 2rem;
}

.calc-filter {
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  border: 1px solid var(--border);
  background: var(--bg-card);
  transition: all var(--transition);
}

.calc-filter:hover,
.calc-filter.active {
  color: var(--gold-light);
  border-color: rgba(201, 162, 39, 0.4);
  background: rgba(201, 162, 39, 0.08);
}

.calc-section { margin-bottom: 2.5rem; }

.calc-section-head {
  text-align: center;
  margin-bottom: 1.25rem;
}

.calc-section-head h2 {
  font-size: 1.35rem;
  margin-bottom: 0.35rem;
}

.calc-section-head p {
  color: var(--text-dim);
  font-size: 0.9rem;
}

.calc-section-head a {
  color: var(--gold);
}

.calc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

.calc-card {
  display: flex;
  flex-direction: column;
  background: linear-gradient(160deg, #221c15, #16120e);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem;
  text-decoration: none;
  color: inherit;
  position: relative;
  transition: all var(--transition);
  min-height: 100%;
}

.calc-card:hover {
  border-color: var(--border-light);
  transform: translateY(-3px);
  box-shadow: var(--shadow-gold);
}

.calc-card--local { border-top: 3px solid var(--gold); }
.calc-card--external { border-top: 3px solid var(--blue); }

.calc-card-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  line-height: 1;
}

.calc-badge {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  font-family: var(--font-heading);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.2rem 0.45rem;
  border-radius: var(--radius-sm);
  background: rgba(201, 162, 39, 0.2);
  color: var(--gold-light);
  border: 1px solid rgba(201, 162, 39, 0.35);
}

.calc-card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
}

.calc-card p {
  color: var(--text-dim);
  font-size: 0.88rem;
  line-height: 1.55;
  flex: 1;
  margin-bottom: 0.85rem;
}

.calc-card-cta {
  font-family: var(--font-heading);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold-light);
}

.calc-card--external .calc-card-cta { color: var(--blue-light); }

.calc-card.is-hidden { display: none; }

.calc-credit {
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-top: 1rem;
}

/* —— Single calculator page —— */
.calc-page { max-width: 720px; margin: 0 auto; }

.calc-tool {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.calc-panel {
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem;
}

.calc-panel h3 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.calc-intro {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  line-height: 1.6;
}

.calc-field {
  margin-bottom: 1rem;
}

.calc-field label {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.35rem;
}

.calc-field input,
.calc-field select {
  width: 100%;
  padding: 0.65rem 0.85rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 1rem;
}

.calc-field input:focus,
.calc-field select:focus {
  outline: none;
  border-color: var(--gold);
}

.calc-row-2 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.calc-presets { margin-bottom: 1rem; }

.calc-presets-label {
  display: block;
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
}

.calc-preset-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.calc-preset-btns .btn {
  font-size: 0.62rem;
  padding: 0.4rem 0.65rem;
}

.calc-sliders { display: flex; flex-direction: column; gap: 0.85rem; }

.calc-slider-row label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  margin-bottom: 0.3rem;
}

.calc-slider-row output {
  color: var(--gold-light);
  font-weight: 700;
}

.calc-slider-row input[type="range"] {
  width: 100%;
  accent-color: var(--gold);
}

.calc-hint {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin: 0;
}

.calc-hint.is-warn { color: var(--warning); }

.calc-results {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.calc-result-card {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
}

.calc-result-card--inf { border-color: rgba(122, 92, 200, 0.4); }
.calc-result-card--cav { border-color: rgba(74, 124, 155, 0.4); }
.calc-result-card--arch { border-color: rgba(201, 162, 39, 0.4); }

.calc-result-icon { font-size: 1.5rem; display: block; margin-bottom: 0.25rem; }

.calc-result-num {
  display: block;
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--gold-light);
  margin-bottom: 0.2rem;
}

.calc-result-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
}

.calc-tip { margin-top: 0.25rem; }

.calc-lanes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.calc-lane {
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
}

.calc-lane h4 {
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
  color: var(--text-dim);
}

.calc-lane-count {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--gold-light);
}

.calc-lane-tag {
  display: inline-block;
  margin-top: 0.35rem;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  background: rgba(201, 162, 39, 0.12);
  color: var(--gold-light);
}

.calc-lane--left { border-top: 3px solid #7c5cfc; }
.calc-lane--mid { border-top: 3px solid var(--gold); }
.calc-lane--right { border-top: 3px solid var(--blue); }

.calc-speedup-list {
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
}

.calc-speedup-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.55rem 0;
  border-bottom: 1px solid rgba(92, 74, 50, 0.3);
}

.calc-speedup-row:last-child { border-bottom: none; }

.calc-speedup-name { font-weight: 600; }
.calc-speedup-count {
  font-family: var(--font-display);
  color: var(--gold-light);
  font-size: 1.1rem;
}

.calc-speedup-total {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 2px solid var(--border);
  text-align: center;
  color: var(--text-dim);
  font-size: 0.9rem;
}

@media (max-width: 600px) {
  .calc-results,
  .calc-lanes,
  .calc-row-2 {
    grid-template-columns: 1fr;
  }

  .calc-preset-btns .btn {
    flex: 1 1 calc(50% - 0.4rem);
  }
}