.calculator {
  padding: var(--space-after-hero) 0 var(--space-section);
  background: var(--bg-page);
  border-radius: 50%;
}

.calculator__surface {
  padding: 40px 36px 36px;
  border-radius: 24px;
  border: 1px solid var(--border-soft);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(255, 96, 0, 0.14) 0%, rgba(255, 96, 0, 0) 52%),
    linear-gradient(180deg, var(--surface-tint-strong) 0%, rgba(17, 22, 28, 0) 100%),
    var(--bg-panel-soft);
}

.calculator__intro {
  max-width: 780px;
  margin-bottom: 24px;
}

.calculator__title {
  margin: 0 0 var(--space-h2-after);
  font-size: var(--typo-h2-size);
  line-height: var(--typo-h2-line-height);
  font-weight: var(--typo-h2-weight);
  letter-spacing: -0.02em;
}

.calculator__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text-muted);
}

.calculator__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 342px);
  grid-template-areas:
    "form result"
    "actions result";
  gap: 20px;
  align-items: start;
}

.calculator-form {
  grid-area: form;
  min-width: 0;
}

.calculator-form__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.calculator-field {
  display: grid;
  gap: 8px;
  position: relative;
}

.calculator-field.is-open {
  z-index: 5;
}

.calculator-field--address {
  grid-column: 1 / -1;
}

.calculator-field__label {
  font-size: 14px;
  line-height: 1.2;
  font-weight: 600;
  color: var(--text-primary);
}

.calculator-field__input,
.calculator-select__trigger {
  width: 100%;
  min-height: 56px;
  border-radius: 14px;
  border: 1px solid transparent;
  background: var(--bg-input);
  color: var(--text-primary);
  outline: none;
  transition:
    border-color var(--transition-base),
    box-shadow var(--transition-base),
    background-color var(--transition-base);
}

.calculator-field__input {
  padding: 0 18px;
}

.calculator-field__input::placeholder {
  color: var(--text-dim);
}

.calculator-field__input:focus-visible,
.calculator-select__trigger:focus-visible {
  border-color: rgba(255, 96, 0, 0.52);
  box-shadow: 0 0 0 3px rgba(255, 96, 0, 0.2);
}

.calculator-select {
  position: relative;
}

.calculator-select__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 16px;
  text-align: left;
}

.calculator-select__label {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-dim);
}

.calculator-select.has-value .calculator-select__label {
  color: var(--text-primary);
}

.calculator-select__caret {
  width: 8px;
  height: 8px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-1px);
  transition: transform var(--transition-fast);
  color: var(--text-dim);
  flex-shrink: 0;
}

.calculator-select.is-open .calculator-select__trigger {
  border-color: rgba(255, 96, 0, 0.6);
  box-shadow: 0 0 0 3px rgba(255, 96, 0, 0.16);
}

.calculator-select.is-open .calculator-select__caret {
  transform: rotate(225deg) translateY(1px);
}

.calculator-select__dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: var(--bg-dropdown);
  border: 1px solid var(--border-soft);
  border-radius: 14px;
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.34);
  overflow: hidden;
}

.calculator-select__search-wrap {
  padding: 10px;
  border-bottom: 1px solid var(--border-soft);
}

.calculator-select__search {
  width: 100%;
  min-height: 40px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: var(--bg-input);
  color: var(--text-primary);
  padding: 0 12px;
  outline: none;
}

.calculator-select__search::placeholder {
  color: var(--text-dim);
}

.calculator-select__search:focus-visible {
  border-color: rgba(255, 96, 0, 0.52);
  box-shadow: 0 0 0 3px rgba(255, 96, 0, 0.2);
}

.calculator-select__options {
  max-height: 246px;
  overflow-y: auto;
  padding: 8px;
  display: grid;
  gap: 4px;
}

.calculator-select__manual {
  padding: 10px;
  border-top: 1px solid var(--border-soft);
}

.calculator-select__manual-input {
  width: 100%;
  min-height: 40px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: var(--bg-input);
  color: var(--text-primary);
  padding: 0 12px;
  outline: none;
  transition:
    border-color var(--transition-base),
    box-shadow var(--transition-base);
}

.calculator-select__manual-input::placeholder {
  color: var(--text-dim);
}

.calculator-select__manual-input:focus-visible {
  border-color: rgba(255, 96, 0, 0.52);
  box-shadow: 0 0 0 3px rgba(255, 96, 0, 0.2);
}

.calculator-select__option {
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--text-primary);
  font-size: 14px;
  line-height: 1.35;
  text-align: left;
  padding: 10px 12px;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.calculator-select__option:hover {
  background: var(--hover-bg);
}

.calculator-select__option.is-selected {
  background: rgba(255, 96, 0, 0.2);
  color: var(--text-primary);
}

.calculator-select__option.is-empty {
  pointer-events: none;
  color: var(--text-dim);
}

.calculator-field.is-invalid .calculator-field__input,
.calculator-field.is-invalid .calculator-select__trigger {
  border-color: rgba(217, 82, 82, 0.9);
  box-shadow: 0 0 0 3px rgba(217, 82, 82, 0.2);
}

.calculator-field.is-invalid .calculator-select__manual-input {
  border-color: rgba(217, 82, 82, 0.9);
  box-shadow: 0 0 0 3px rgba(217, 82, 82, 0.2);
}

.calculator-field.is-disabled-by-item {
  opacity: 0.6;
}

.calculator-select.is-disabled-by-item .calculator-select__trigger {
  cursor: not-allowed;
}

.calculator-field__error {
  margin: 0;
  min-height: 16px;
  font-size: 12px;
  line-height: 1.3;
  color: #ff8a8a;
}

.calculator-form__actions {
  grid-area: actions;
  margin-top: 14px;
  display: flex;
  align-items: center;
}

.calculator-form__submit {
  min-width: 240px;
}

.calculator-form__submit:disabled {
  opacity: 0.56;
  cursor: not-allowed;
  box-shadow: none;
}

.calculator-form__submit.is-pending {
  opacity: 0.82;
  pointer-events: none;
}

.calculator-result {
  grid-area: result;
  border-radius: 18px;
  border: 1px solid var(--border-soft);
  background: var(--hover-bg);
  padding: 22px 20px;
  transition:
    border-color var(--transition-base),
    box-shadow var(--transition-base),
    background-color var(--transition-base);
}

.calculator.is-calculated .calculator-result {
  border-color: rgba(255, 96, 0, 0.62);
  background: rgba(255, 96, 0, 0.08);
  box-shadow: 0 10px 24px rgba(255, 96, 0, 0.16);
}

.calculator-result__label {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.2;
  color: var(--text-dim);
}

.calculator-result__value {
  margin: 0 0 12px;
  font-size: 42px;
  line-height: 1;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.calculator-result__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.45;
  color: var(--text-dim);
}

@media (min-width: 1200px) {
  .product-detail-calculator-modal .calculator__layout {
    grid-template-areas:
      "form form"
      "result result"
      "actions actions";
  }

  .product-detail-calculator-modal .calculator-field--address {
    grid-column: 1 / -1;
  }
}

@media (max-width: 1199px) {
  .calculator__surface {
    padding: 32px 28px;
  }

  .calculator__intro {
    margin-bottom: 22px;
  }

  .calculator__layout {
    grid-template-columns: 1fr;
    grid-template-areas:
      "form"
      "result"
      "actions";
  }

  .calculator-result {
    max-width: 100%;
  }
}

@media (max-width: 767px) {
  .calculator__surface {
    padding: 24px 18px;
    border-radius: 18px;
  }

  .calculator__intro {
    margin-bottom: 18px;
  }

  .calculator__text {
    font-size: 15px;
  }

  .calculator-form__grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .calculator-field--address {
    grid-column: auto;
  }

  .calculator-field__input,
  .calculator-select__trigger {
    min-height: 52px;
    border-radius: 12px;
  }

  .calculator-form__submit {
    width: 100%;
  }

  .calculator-result {
    margin-top: 2px;
    padding: 20px 16px;
  }

  .calculator-form__actions {
    margin-top: 10px;
  }

  .calculator-result__value {
    font-size: 36px;
  }
}

html[data-theme="light"] .calculator__surface {
  background:
    linear-gradient(180deg, rgba(17, 22, 28, 0.03) 0%, rgba(17, 22, 28, 0) 100%),
    #f7f9fc;
  border-color: rgba(16, 20, 24, 0.12);
  box-shadow: 0 6px 18px rgba(16, 20, 24, 0.06);
}

.modal__dialog--calculator .calculator {
  padding: 0;
}