/* VO2 max calculator — shared styles */

.calc {
  max-width: 720px;
  margin: 0 auto;
}

.calc__inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem 1.5rem;
}

.calc__field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.calc__field label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text);
}

.calc__field input,
.calc__field select {
  font-family: "Inter", sans-serif;
  font-size: 1rem;
  padding: 0.75rem 0.85rem;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  background: #fff;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  -webkit-appearance: none;
}

.calc__field input:hover,
.calc__field select:hover {
  border-color: #c8c8d0;
}

.calc__field input:focus,
.calc__field select:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(0, 209, 163, 0.18);
}

.calc__field input[type="number"] {
  -moz-appearance: textfield;
}

.calc__field input::-webkit-outer-spin-button,
.calc__field input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.calc__field small {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* Result display */

.calc__output {
  margin-top: 2rem;
  text-align: center;
}

.calc__result {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  min-height: 80px;
  justify-content: center;
}

.calc__weeks {
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--brand-dark);
}

.calc__weeks-label {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.calc__achieved {
  font-size: 1.125rem;
  color: var(--brand-dark);
  font-weight: 600;
}

.calc__placeholder {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.calc__unreachable {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  max-width: 320px;
  display: inline-block;
}

/* Chart */

.calc__chart-wrap {
  margin-top: 1.5rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
}

.calc__chart-wrap canvas {
  width: 100%;
  height: 280px;
  display: block;
}

/* Homepage compact variant */

.calc--compact {
  text-align: center;
}

.calc--compact .calc__inputs {
  grid-template-columns: repeat(3, 1fr);
  max-width: 480px;
  margin: 0 auto;
}

.calc--compact .calc__output {
  margin-top: 1.5rem;
}

.calc--compact .calc__link {
  display: inline-block;
  margin-top: 1rem;
  font-size: 0.9375rem;
  font-weight: 600;
}

/* Full page layout */

.calc--full,
.calc--projection {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.75rem 1.75rem 1.5rem;
  box-shadow: 0 2px 12px rgba(17, 17, 17, 0.04);
  margin: 1.5rem 0 2rem;
  max-width: none;
}

.calc--full .calc__body,
.calc--projection .calc__body {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.calc--full .calc__inputs,
.calc--projection .calc__inputs {
  grid-template-columns: 1fr 1fr 1fr;
}

/* Tabbed calculator UI */

.calc-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
  padding: 0.3rem;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
}

.calc-tab {
  appearance: none;
  background: transparent;
  border: none;
  padding: 0.6rem 0.95rem;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 8px;
  transition: color 0.15s, background 0.15s;
}

.calc-tab:hover {
  color: var(--text);
  background: rgba(0, 209, 163, 0.08);
}

.calc-tab.active {
  color: #fff;
  background: var(--brand);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(0, 184, 144, 0.25);
}

.calc-method {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.calc-method[hidden] {
  display: none;
}

.calc-method__desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin: 0 0 0.5rem;
}

.calc-method__desc a {
  color: var(--brand);
}

/* Tabbed result card */

.calc-result {
  margin-top: 1.25rem;
  padding: 1.75rem 1.5rem;
  border: 1.5px solid rgba(0, 209, 163, 0.25);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(0, 209, 163, 0.04), rgba(0, 209, 163, 0.10));
  text-align: center;
  min-height: 90px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.calc-result__value {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--brand-dark);
}

.calc-result__value small {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0;
}

.calc-result__category {
  font-size: 1rem;
  color: var(--text);
}

.calc-result__note {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  max-width: 480px;
  line-height: 1.45;
}

.calc-result__links {
  margin-top: 0.5rem;
  font-size: 0.875rem;
  line-height: 1.6;
}

.calc-result__links a {
  color: var(--brand);
  text-decoration: none;
}

.calc-result__links a:hover {
  text-decoration: underline;
}

.calc__sub {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

/* Responsive */

@media (max-width: 600px) {
  .calc__inputs {
    grid-template-columns: 1fr 1fr;
  }

  .calc--full,
  .calc--projection {
    padding: 1.25rem 1rem 1rem;
    border-radius: 12px;
  }

  .calc-tabs {
    padding: 0.25rem;
  }

  .calc-tab {
    padding: 0.5rem 0.65rem;
    font-size: 0.875rem;
  }

  .calc-result {
    padding: 1.5rem 1rem;
  }

  .calc-result__value {
    font-size: 2.25rem;
  }

  .calc--compact .calc__inputs {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .calc--full .calc__inputs {
    grid-template-columns: 1fr 1fr;
  }

  .calc__chart-wrap canvas {
    height: 220px;
  }

  .calc__weeks {
    font-size: 2.5rem;
  }
}

@media (max-width: 400px) {
  .calc--compact .calc__inputs {
    grid-template-columns: 1fr;
    max-width: 200px;
  }
}