/* ── Asphalt Calculator – Styles ─────────────────────────────────────────── */

.asphalt-calc-wrap {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  max-width: 720px;
  margin: 2rem auto;
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.07);
  color: #1e293b;
}

.asphalt-calc__title {
  font-size: 1.6rem;
  font-weight: 700;
  margin: 0 0 0.4rem;
  color: #0f172a;
}

.asphalt-calc__desc {
  font-size: 0.95rem;
  color: #64748b;
  margin: 0 0 1.5rem;
}

/* ── Toggle ─────────────────────────────────────────────────────────────── */

.asphalt-calc__toggle-wrap {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.asphalt-calc__toggle {
  padding: 0.45rem 1.1rem;
  border: 2px solid #334155;
  border-radius: 6px;
  background: transparent;
  color: #334155;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.asphalt-calc__toggle--active {
  background: #334155;
  color: #fff;
}

/* ── Fieldsets ───────────────────────────────────────────────────────────── */

.asphalt-calc__fieldset {
  border: none;
  padding: 0;
  margin: 0 0 1.4rem;
}

.asphalt-calc__fieldset legend {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: #64748b;
  margin-bottom: 0.75rem;
}

.asphalt-calc__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 500px) {
  .asphalt-calc__row {
    grid-template-columns: 1fr;
  }
}

.asphalt-calc__field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.asphalt-calc__field label {
  font-size: 0.88rem;
  font-weight: 600;
  color: #374151;
}

.asphalt-calc__field input[type="number"] {
  padding: 0.6rem 0.85rem;
  border: 1.5px solid #cbd5e1;
  border-radius: 8px;
  font-size: 1rem;
  color: #0f172a;
  background: #f8fafc;
  transition: border-color 0.2s, box-shadow 0.2s;
  width: 100%;
  box-sizing: border-box;
}

.asphalt-calc__field input[type="number"]:focus {
  outline: none;
  border-color: #f59e0b;
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.18);
  background: #fff;
}

.asphalt-calc__field--info {
  font-size: 0.8rem;
  color: #64748b;
  background: #f1f5f9;
  border-radius: 8px;
  padding: 0.7rem 1rem;
  justify-content: center;
  line-height: 1.7;
}

/* ── Buttons ─────────────────────────────────────────────────────────────── */

.asphalt-calc__btn-wrap {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.asphalt-calc__btn {
  padding: 0.7rem 2rem;
  border: none;
  border-radius: 8px;
  background: #f59e0b;
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

.asphalt-calc__btn:hover {
  background: #d97706;
}

.asphalt-calc__btn:active {
  transform: scale(0.97);
}

.asphalt-calc__btn--reset {
  background: #e2e8f0;
  color: #334155;
}

.asphalt-calc__btn--reset:hover {
  background: #cbd5e1;
}

/* ── Results ─────────────────────────────────────────────────────────────── */

.asphalt-calc__results {
  margin-top: 2rem;
  border-top: 2px solid #f1f5f9;
  padding-top: 1.5rem;
}

.asphalt-calc__results-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 1rem;
  color: #0f172a;
}

.asphalt-calc__results-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

@media (max-width: 500px) {
  .asphalt-calc__results-grid {
    grid-template-columns: 1fr;
  }
}

.asphalt-calc__result-card {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  padding: 1rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.asphalt-calc__result-card--highlight {
  background: #fefce8;
  border-color: #fde68a;
}

.asphalt-calc__result-label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: #64748b;
}

.asphalt-calc__result-value {
  font-size: 1.45rem;
  font-weight: 800;
  color: #0f172a;
}

.asphalt-calc__result-card--highlight .asphalt-calc__result-value {
  color: #b45309;
}

.asphalt-calc__disclaimer {
  font-size: 0.78rem;
  color: #94a3b8;
  margin-top: 1rem;
  line-height: 1.5;
}

/* ── Error ───────────────────────────────────────────────────────────────── */

.asphalt-calc__error {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  background: #fef2f2;
  border: 1px solid #fca5a5;
  border-radius: 8px;
  color: #b91c1c;
  font-size: 0.9rem;
  font-weight: 600;
}