/* ==========================================================================
   Block 6 — Kalkulator
   ========================================================================== */

.calculator {
  background: var(--color-paper);
  border-top: 1px solid var(--color-border);
}

.calculator__layout {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: var(--space-lg);
  align-items: start;
}

.calculator__form {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.calc-field {
  margin-bottom: var(--space-md);
}
.calc-field label {
  display: block;
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: var(--space-2xs);
}
.calc-field input[type="number"],
.calc-field select {
  width: 100%;
  padding: 0.75rem 0.9rem;
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--fs-body);
  color: var(--color-text);
  transition: border-color var(--dur-fast) var(--ease-out);
}
.calc-field input[type="number"]:focus,
.calc-field select:focus { border-color: var(--color-accent); }

.calc-field select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  padding-right: 2.5rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23151513' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.85rem center;
  background-size: 16px;
}

.calc-fieldset {
  border: none;
  padding: 0;
  margin: var(--space-lg) 0 0;
}
.calc-fieldset legend {
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: var(--space-sm);
  padding: 0;
}

.calc-light-row {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  border-top: 1px solid var(--color-border);
}
.calc-light-row:first-of-type { border-top: none; }

.calc-light-row .calc-checkbox {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  flex: 1;
  font-size: var(--fs-small);
  color: var(--color-text);
  cursor: pointer;
}
.calc-light-row input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-accent);
}

.calc-light-row .calc-qty {
  display: flex;
  align-items: center;
  gap: var(--space-2xs);
}
.calc-light-row .calc-qty input {
  width: 72px;
  padding: 0.5rem 0.6rem;
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  text-align: center;
  transition: opacity var(--dur-fast) var(--ease-out);
}
.calc-light-row .calc-qty span {
  font-size: var(--fs-micro);
  color: var(--color-text-muted);
}
.calc-light-row .calc-qty input:disabled { opacity: 0.4; }

/* Result panel */
.calculator__result {
  position: sticky;
  top: 96px;
  background: var(--color-ink);
  color: var(--color-text-inverse);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.calculator__result-label {
  font-size: var(--fs-micro);
  letter-spacing: 0.04em;
  color: var(--color-text-inverse-muted);
}

.calculator__result-value {
  margin-top: var(--space-2xs);
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3vw, 2.6rem);
  color: var(--color-white);
  transition: opacity var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.calculator__result-value span { color: var(--color-accent); }
.calculator__result-value.is-updated { opacity: 0.55; transform: translateY(2px); }

.calculator__result-note {
  margin-top: var(--space-sm);
  font-size: var(--fs-small);
  color: var(--color-text-inverse-muted);
  line-height: var(--lh-body);
}

.calculator__result .btn {
  width: 100%;
  margin-top: var(--space-lg);
}

@media (max-width: 900px) {
  .calculator__layout { grid-template-columns: 1fr; }
  .calculator__result { position: static; }
}