/* Калькулятор стоимости */

.calculator {
  padding: 56px 0 72px;
  background: #ffffff;
  border-top: 1px solid rgba(148, 163, 184, 0.35);
}

@media (min-width: 900px) {
  .calculator {
    padding: 72px 0 88px;
  }
}

.calculator-header {
  max-width: 100%;
  margin: 0 0 32px 0;
  text-align: left;
}

.calculator-kicker {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted2, #6b7280);
}

.calculator-title {
  margin: 0 0 14px;
  font-size: 24px;
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text, #0f172a);
}

@media (min-width: 900px) {
  .calculator-title {
    font-size: 28px;
  }
}

.calculator-subtitle {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--muted, #4b5563);
}

/* ========================================
   СЕТКА КАЛЬКУЛЯТОРА
   ======================================== */

.calculator-grid {
  display: grid;
  gap: 18px;
  align-items: start;
}

@media (min-width: 900px) {
  .calculator-grid {
    grid-template-columns: 1.2fr 1fr;
    gap: 20px;
  }
}

/* ========================================
   ПАНЕЛИ
   ======================================== */

.calculator-panel {
  background: #ffffff;
  border-radius: 16px;
  padding: 20px;
  border: 1px solid rgba(148, 163, 184, 0.35);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
}

.calculator-form-panel {
  border-top: 3px solid #0ea5e9;
  background: linear-gradient(180deg, #f0f9ff 0%, #ffffff 40%);
}

.calculator-result-panel {
  border-top: 3px solid #22c55e;
  background: linear-gradient(180deg, #f0fdf4 0%, #ffffff 40%);
}

@media (min-width: 900px) {
  .calculator-result-panel {
    position: sticky;
    top: 80px;
  }
}

.calculator-panel-header {
  margin-bottom: 18px;
}

.calculator-panel-title {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--text, #0f172a);
}

.calculator-panel-subtitle {
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted, #4b5563);
}

/* ========================================
   ФОРМА
   ======================================== */

.calculator-form {
  display: grid;
  gap: 16px;
}

.calc-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.calc-field-row {
  display: grid;
  gap: 12px;
}

@media (min-width: 600px) {
  .calc-field-row {
    grid-template-columns: 1fr 1fr;
  }
}

.calc-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text, #0f172a);
}

.calc-select {
  padding: 10px 14px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  border-radius: 10px;
  font-size: 14px;
  color: var(--text, #0f172a);
  background: #ffffff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.calc-select:focus {
  outline: none;
  border-color: #0ea5e9;
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

/* ========================================
   ЧЕКБОКСЫ
   ======================================== */

.calc-checkboxes {
  display: grid;
  gap: 10px;
  margin-top: 4px;
}

.calc-checkbox-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  padding: 12px;
  border: 1px solid rgba(148, 163, 184, 0.3);
  border-radius: 10px;
  background: #ffffff;
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.calc-checkbox-item:hover {
  border-color: #0ea5e9;
  background: rgba(240, 249, 255, 0.5);
}

.calc-checkbox-input {
  width: 20px;
  height: 20px;
  margin-top: 2px;
  cursor: pointer;
  accent-color: #0ea5e9;
}

.calc-checkbox-content {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.calc-checkbox-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text, #0f172a);
}

.calc-checkbox-desc {
  font-size: 12px;
  line-height: 1.4;
  color: var(--muted, #4b5563);
}

/* ========================================
   КНОПКИ
   ======================================== */

.btn-calc-submit,
.btn-calc-order {
  width: 100%;
  justify-content: center;
  padding: 12px 20px;
  font-size: 15px;
  font-weight: 600;
}

.btn-calc-submit {
  margin-top: 4px;
}

/* ========================================
   ЗАМЕТКА
   ======================================== */

.calculator-note {
  margin: 12px 0 0;
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted2, #6b7280);
}

/* ========================================
   РЕЗУЛЬТАТ РАСЧЁТА
   ======================================== */

.calculator-result {
  padding: 18px;
  border-radius: 14px;
  border: 1px solid rgba(14, 165, 233, 0.25);
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.08), rgba(37, 99, 235, 0.05));
  margin-bottom: 16px;
}

.calc-price-section {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.calc-price-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted2, #6b7280);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.calc-price-old {
  font-size: 20px;
  font-weight: 800;
  color: rgba(71, 85, 105, 0.6);
  text-decoration: line-through;
  text-decoration-thickness: 2px;
}

.calc-price-divider {
  height: 1px;
  background: rgba(148, 163, 184, 0.25);
  margin: 12px 0;
}

.calc-price-main {
  font-size: 36px;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--text, #0f172a);
}

.calc-price-note {
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted, #4b5563);
}

/* ========================================
   ПОДСКАЗКА
   ======================================== */

.calculator-hint {
  padding: 14px;
  border-radius: 10px;
  background: rgba(249, 250, 251, 0.8);
  border: 1px solid rgba(148, 163, 184, 0.2);
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted, #4b5563);
  margin-bottom: 14px;
}

/* ========================================
   МОБИЛЬНАЯ ВЕРСИЯ
   ======================================== */

@media (max-width: 900px) {
  .calculator {
    padding: 40px 0 80px;
  }

  .calculator-header {
    margin-bottom: 24px;
  }

  .calculator-title {
    font-size: 22px;
    margin-bottom: 10px;
  }

  .calculator-subtitle {
    font-size: 14px;
  }

  .calculator-grid {
    gap: 14px;
  }

  .calculator-panel {
    padding: 16px;
  }

  .calculator-panel-title {
    font-size: 16px;
  }

  .calculator-panel-subtitle {
    font-size: 12px;
  }

  .calculator-form {
    gap: 14px;
  }

  .calc-label {
    font-size: 12px;
  }

  .calc-select {
    padding: 9px 12px;
    font-size: 13px;
  }

  .calc-checkbox-item {
    padding: 10px;
    gap: 10px;
  }

  .calc-checkbox-input {
    width: 18px;
    height: 18px;
  }

  .calc-checkbox-title {
    font-size: 13px;
  }

  .calc-checkbox-desc {
    font-size: 11px;
  }

  .calculator-result {
    padding: 16px;
  }

  .calc-price-old {
    font-size: 18px;
  }

  .calc-price-main {
    font-size: 32px;
  }

  .calc-price-note {
    font-size: 12px;
  }

  .calculator-hint {
    padding: 12px;
    font-size: 12px;
    margin-bottom: 12px;
  }

  .btn-calc-submit,
  .btn-calc-order {
    font-size: 14px;
    padding: 11px 16px;
  }
}

/* Очень маленькие экраны */
@media (max-width: 400px) {
  .calculator-title {
    font-size: 20px;
  }

  .calculator-panel {
    padding: 14px;
  }

  .calc-price-main {
    font-size: 28px;
  }
}

/* ========================================
   СКРЫТИЕ РЕЗУЛЬТАТА ДО РАСЧЁТА (МОБИЛКА)
   ======================================== */

@media (max-width: 900px) {
  .calculator-result-panel {
    display: none;
    opacity: 0;
    transform: translateY(20px);
    position: static;
  }

  .calculator-result-panel.is-visible {
    display: block;
    animation: slideInResult 0.5s ease forwards;
  }

  @keyframes slideInResult {
    from {
      opacity: 0;
      transform: translateY(20px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}

/* Поле ввода площади */
.calc-input {
  padding: 10px 14px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  border-radius: 10px;
  font-size: 14px;
  color: var(--text, #0f172a);
  background: #ffffff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  width: 100%;
}

.calc-input:focus {
  outline: none;
  border-color: #0ea5e9;
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.calc-field-hint {
  margin: 4px 0 0;
  font-size: 12px;
  color: var(--muted2, #6b7280);
  line-height: 1.4;
}

@media (max-width: 900px) {
  .calc-input {
    padding: 9px 12px;
    font-size: 13px;
  }
  
  .calc-field-hint {
    font-size: 11px;
  }
}

/* Поле ввода площади */
.calc-input {
  padding: 10px 14px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  border-radius: 10px;
  font-size: 16px; /* Увеличено с 14px до 16px - предотвращает автозум на iOS */
  color: var(--text, #0f172a);
  background: #ffffff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  width: 100%;
}

.calc-input:focus {
  outline: none;
  border-color: #0ea5e9;
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.calc-field-hint {
  margin: 4px 0 0;
  font-size: 12px;
  color: var(--muted2, #6b7280);
  line-height: 1.4;
}

@media (max-width: 900px) {
  .calc-input {
    padding: 9px 12px;
    font-size: 16px; /* Оставляем 16px даже на мобилке */
  }
  
  .calc-field-hint {
    font-size: 11px;
  }
}