.kw-calculator {
  --kw-border: #d6d3d1;
  --kw-text: #1c1917;
  --kw-muted: #57534e;
  --kw-bg: #ffffff;
  --kw-accent: #0f766e;
  --kw-danger: #b91c1c;
  --kw-soft: #f5f5f4;
  box-sizing: border-box;
  max-width: 28rem;
  margin: 0 auto;
  padding: 1.35rem;
  color: var(--kw-text);
  background: var(--kw-bg);
  border: 1px solid var(--kw-border);
  border-radius: 10px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 1rem;
  line-height: 1.45;
}
.kw-calculator *,
.kw-calculator *::before,
.kw-calculator *::after {
  box-sizing: border-box;
}
.kw-calculator__intro {
  margin: 0 0 1rem;
  color: var(--kw-muted);
  font-size: 0.95rem;
}
.kw-calc-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin-bottom: 0.25rem;
}
.kw-field {
  margin-bottom: 0.85rem;
}
.kw-field label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.3rem;
}
.kw-calculator input[type="text"],
.kw-calculator input[type="number"],
.kw-calculator select {
  width: 100%;
  min-height: 2.85rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--kw-border);
  border-radius: 8px;
  font-size: 1.05rem;
  background: #fff;
  color: var(--kw-text);
}
.kw-calculator input:focus,
.kw-calculator select:focus,
.kw-calculator summary:focus,
.kw-calculator button:focus {
  outline: 2px solid var(--kw-accent);
  outline-offset: 2px;
}
.kw-input-unit {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.kw-input-unit input {
  flex: 1;
}
.kw-unit-label {
  min-width: 2rem;
  color: var(--kw-muted);
  font-size: 0.9rem;
  font-weight: 600;
}
.kw-calc-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin: 0.5rem 0 0.75rem;
}
.kw-calc-dims {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin-bottom: 0.25rem;
}
.kw-field--qty {
  grid-column: 1 / -1;
}
.kw-qty {
  display: grid;
  grid-template-columns: 2.75rem 1fr 2.75rem;
  gap: 0.4rem;
}
.kw-qty input {
  text-align: center;
}
.kw-qty__btn {
  min-height: 2.75rem;
  border: 1px solid var(--kw-border);
  border-radius: 8px;
  background: #fff;
  font-size: 1.2rem;
  cursor: pointer;
}
.kw-calc-more {
  margin: 0.5rem 0;
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--kw-border);
  border-radius: 8px;
  background: var(--kw-soft);
}
.kw-calc-more summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
}
.kw-field-error {
  margin: 0.3rem 0 0;
  color: var(--kw-danger);
  font-size: 0.85rem;
}
.kw-field.is-invalid input,
.kw-field.is-invalid select {
  border-color: #fca5a5;
}
.kw-calculator .kw-btn--ghost {
  background: transparent;
  border: 1px solid var(--kw-border);
  color: var(--kw-muted);
}
.kw-calculator .kw-btn--new {
  margin-top: 0.75rem;
  width: 100%;
}
.kw-result__meta {
  list-style: none;
  margin: 0 0 0.5rem;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.4rem;
}
.kw-result__meta li {
  border: 1px solid var(--kw-border);
  border-radius: 8px;
  padding: 0.45rem;
  font-size: 0.8rem;
  color: var(--kw-muted);
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.kw-result__meta strong {
  color: var(--kw-text);
  font-size: 0.95rem;
}
.kw-calculator .kw-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  padding: 0.55rem 1rem;
  border-radius: 8px;
  border: 1px solid transparent;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
}
.kw-calculator .kw-btn--primary {
  background: var(--kw-accent);
  color: #fff;
  border-color: var(--kw-accent);
  flex: 1;
}
.kw-calculator .kw-btn--secondary {
  background: #fff;
  color: var(--kw-text);
  border-color: var(--kw-border);
}
.kw-status {
  color: var(--kw-muted);
  font-size: 0.9rem;
}
.kw-errors {
  color: var(--kw-danger);
  margin: 0.5rem 0;
  font-weight: 600;
}
.kw-result {
  margin-top: 1rem;
  padding: 1.1rem 1.15rem;
  border: 1px solid #99f6e4;
  border-radius: 10px;
  background: #f0fdfa;
}
.kw-result__label {
  margin: 0;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  color: var(--kw-muted);
}
.kw-result__price {
  margin: 0.25rem 0 0.85rem;
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.kw-result__price strong {
  font-weight: 700;
}
.kw-result__list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.kw-result__list li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid #ccfbf1;
  font-size: 0.95rem;
}
.kw-result__list li:last-child {
  border-bottom: 0;
}
.kw-explain {
  margin-top: 0.85rem;
}
.kw-explain__body {
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.9rem;
  background: #fff;
  border: 1px solid var(--kw-border);
  border-radius: 8px;
  padding: 0.75rem;
  margin-top: 0.5rem;
  color: var(--kw-text);
}
@media (max-width: 430px) {
  .kw-calc-grid {
    grid-template-columns: 1fr;
  }
  .kw-calculator {
    padding: 1rem;
    border-radius: 0;
    border-left: 0;
    border-right: 0;
  }
  .kw-calculator .kw-btn {
    width: 100%;
  }
  .kw-result__price {
    font-size: 1.75rem;
  }
}
@media (min-width: 640px) {
  .kw-calculator {
    max-width: 36rem;
  }
}