/* =============================================================
   СТРАНИЦА: КАЛЬКУЛЯТОР СТОИМОСТИ
   ============================================================= */
.calc {
  display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: start;
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius-xl); padding: clamp(28px, 4vw, 44px); box-shadow: var(--shadow-sm);
}
.calc__field { margin-bottom: 22px; }
.calc__label { display: block; font-weight: 700; font-family: var(--font-display); margin-bottom: 12px; font-size: 1.02rem; }

.calc__options { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.calc__option { position: relative; }
.calc__option input { position: absolute; opacity: 0; }
.calc__option label {
  display: block; padding: 13px 16px; border: 1.5px solid var(--border);
  border-radius: var(--radius-sm); cursor: pointer; font-weight: 600; font-size: .94rem;
  color: var(--text-soft); transition: var(--transition); background: var(--bg-soft);
}
.calc__option input:checked + label { border-color: var(--color-primary); background: rgba(243,74,74,.06); color: var(--color-primary); }
.calc__option label:hover { border-color: var(--color-primary); }

.calc__qty { display: flex; align-items: center; gap: 0; max-width: 220px; }
.calc__qty button { width: 48px; height: 50px; background: var(--bg-muted); font-size: 1.4rem; font-weight: 700; color: var(--text); border: 1.5px solid var(--border); transition: var(--transition); }
.calc__qty button:first-child { border-radius: var(--radius-sm) 0 0 var(--radius-sm); }
.calc__qty button:last-child { border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.calc__qty button:hover { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.calc__qty input { width: 90px; height: 50px; text-align: center; border: 1.5px solid var(--border); border-left: none; border-right: none; font-weight: 700; font-size: 1.1rem; }

/* Результат */
.calc__result { background: var(--grad-dark); color: #fff; border-radius: var(--radius-lg); padding: 32px; position: sticky; top: calc(var(--header-h) + 24px); }
.calc__result h3 { color: #fff; margin-bottom: 22px; }
.calc__result-row { display: flex; justify-content: space-between; padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.12); color: rgba(255,255,255,.78); }
.calc__result-row b { color: #fff; font-family: var(--font-display); }
.calc__result-total { display: flex; justify-content: space-between; align-items: baseline; margin: 22px 0; }
.calc__result-total span { color: rgba(255,255,255,.7); }
.calc__result-total b { font-family: var(--font-display); font-size: 2.4rem; color: #fff; }
.calc__discount { display: inline-block; background: var(--grad-red); padding: 5px 14px; border-radius: var(--radius-pill); font-size: .85rem; font-weight: 700; margin-bottom: 18px; }
.calc__note { font-size: .82rem; color: rgba(255,255,255,.55); margin-top: 16px; line-height: 1.5; }

@media (max-width: 900px) {
  .calc { grid-template-columns: 1fr; gap: 28px; }
  .calc__result { position: static; }
}
@media (max-width: 480px) { .calc__options { grid-template-columns: 1fr; } }