.section--calculator {
  background: var(--color-surface);
}

.section--calculator > .container {
  width: min(1380px, calc(100% - 48px));
}

.section--calculator .section__header {
  max-width: 820px;
  margin-bottom: var(--space-lg);
}

.section--calculator .section__desc {
  margin-inline: 0;
}

.calc-passes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.calc-pass {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 0.2rem 0.55rem;
  padding: 1rem 1.2rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
}

.calc-pass strong {
  grid-row: 1 / 3;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1;
  color: var(--color-accent);
}

.calc-pass span {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.calc-pass small {
  grid-column: 2;
  color: var(--color-text-muted);
  font-size: 0.72rem;
}

.calc-pass--featured {
  border-color: var(--color-accent-light);
  box-shadow: 0 12px 35px rgba(88, 115, 97, 0.09);
}

.calc-pass__label {
  position: absolute;
  top: -0.65rem;
  right: 1rem;
  padding: 0.3rem 0.6rem;
  border-radius: 999px;
  background: var(--color-text);
  color: #fff;
  font-size: 0.55rem !important;
}

.calculator {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(340px, 0.7fr);
  gap: var(--space-md);
  align-items: stretch;
}

.calculator:has(.calculator__result[hidden]) .calculator__form {
  grid-column: 1 / -1;
}

.calculator:has(.calculator__result[hidden]) .calc-grid {
  grid-template-columns: repeat(4, 1fr);
}

.calculator:has(.calculator__result[hidden]) .calc-grid--wide {
  grid-template-columns: repeat(3, 1fr);
}

.calculator__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
}

.calc-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
}

.calc-grid--wide {
  grid-template-columns: repeat(3, 1fr);
}

.form-group select {
  padding: 0.85rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 300;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%236b6560' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
}

.form-group select:focus {
  outline: none;
  border-color: var(--color-accent);
}

.calculator__result {
  padding: var(--space-lg);
  background: var(--color-text);
  color: var(--color-bg);
  border: 1px solid var(--color-text);
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.calculator__result[hidden] {
  display: flex;
  visibility: hidden;
}

.calculator__result.calc-result--show {
  opacity: 1;
  transform: translateY(0);
}

.calc-result__badge {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent-light);
}

.calc-result__sessions {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 500;
  margin-block: var(--space-sm);
  color: var(--color-bg);
}

.calc-result__sessions span {
  color: var(--color-accent-light);
}

.calc-result__title {
  color: var(--color-bg);
  font-size: 1.2rem;
  margin-bottom: 0.35rem;
}

.calc-result__freq {
  font-size: 0.85rem;
  color: rgba(249, 247, 244, 0.55);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid rgba(249, 247, 244, 0.12);
}

.calc-result__list li {
  font-size: 0.9rem;
  color: rgba(249, 247, 244, 0.7);
  padding: 0.4rem 0;
  padding-left: 1rem;
  position: relative;
}

.calc-result__list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--color-accent-light);
}

.calc-result__note {
  margin-block: var(--space-md);
  font-size: 0.82rem;
  color: rgba(249, 247, 244, 0.45);
  line-height: 1.7;
}

.calculator__result .btn--ghost {
  border-color: rgba(249, 247, 244, 0.3);
  color: var(--color-bg);
}

.calculator__result .btn--ghost:hover {
  background: var(--color-bg);
  color: var(--color-text);
}

@media (max-width: 900px) {
  .section--calculator > .container { width: min(100% - 36px, 760px); }
  .calculator { grid-template-columns: 1fr; }
  .calculator:has(.calculator__result[hidden]) .calc-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .calc-grid--wide { grid-template-columns: 1fr; }
  .calculator:has(.calculator__result[hidden]) .calc-grid--wide {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 540px) {
  .section--calculator > .container { width: calc(100% - 28px); }
  .calc-passes { grid-template-columns: 1fr; }
  .calc-grid,
  .calculator:has(.calculator__result[hidden]) .calc-grid {
    grid-template-columns: 1fr;
  }
}