/* ============================================================
   01Academy · Calculator
   Vivid+Co Design System — Prismatic Light Through Obsidian
   ============================================================ */

.calc {
  border-radius: var(--radius-cards);
  background: var(--surface-card-dark);
  color: var(--color-bone-white);
  padding: clamp(28px, 4vw, 56px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(28px, 4vw, 64px);
  position: relative;
  overflow: hidden;
  border: 1px solid var(--color-ash-border);
  box-shadow: none;
}

@media (max-width: 900px) {
  .calc {
    grid-template-columns: 1fr;
  }
}

.calc__head h3 {
  margin-bottom: 8px;
  color: var(--color-bone-white);
  font-size: var(--fs-h3);
}

.calc__sub {
  font-size: var(--text-caption);
  color: var(--color-fog-blue);
  margin-bottom: var(--spacing-40);
}

/* --- Sliders --- */
.calc__controls {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-20);
}

.calc__row label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--spacing-16);
  font-size: 14px;
  color: var(--color-fog-blue);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.calc__row label b {
  color: var(--color-bone-white);
  font-weight: var(--font-weight-regular);
  font-size: 16px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* --- Output Display --- */
.calc__out {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--spacing-16);
}

.calc__box {
  background: #111316;
  border: 1px solid var(--color-ash-border);
  border-radius: 8px;
  padding: 20px 24px;
}

.calc__box--hero {
  background: #171b20;
  border-color: #555f69;
}

.calc__label {
  font-size: 13px;
  color: var(--color-fog-blue);
  margin-bottom: 6px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.calc__num {
  font-family: var(--font-neue-montreal);
  font-weight: var(--font-weight-regular);
  font-size: clamp(32px, 3.8vw, 48px);
  line-height: 1.05;
  color: var(--color-bone-white);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.calc__num small {
  font-family: var(--font-neue-montreal);
  font-size: 0.45em;
  font-weight: var(--font-weight-regular);
  color: var(--color-fog-blue);
  letter-spacing: 0;
}

/* Side by side metric pair */
.calc__pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-16);
}

@media (max-width: 480px) {
  .calc__pair {
    grid-template-columns: 1fr;
  }
}

.calc__pair .calc__num {
  font-size: clamp(24px, 2.6vw, 32px);
}

/* --- Visual Comparison Bar --- */
.calc__compare {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 20px 24px;
  border-radius: 8px;
  background: #111316;
  border: 1px solid var(--color-ash-border);
}

.calc__bar-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
}

.calc__bar-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  font-size: 13px;
  color: var(--color-fog-blue);
}

.calc__bar-head b {
  color: var(--color-bone-white);
  font-weight: var(--font-weight-regular);
  font-variant-numeric: tabular-nums;
}

.calc__bar {
  height: 6px;
  border-radius: 2px;
  background: #20242a;
  overflow: hidden;
}

.calc__bar i {
  display: block;
  height: 100%;
  border-radius: 2px;
  width: var(--w, 0%);
  transition: width var(--dur-slow) var(--ease-vivid);
}

.calc__bar--cost i {
  background: #4a545e;
}

.calc__bar--gain i {
  background: var(--color-bone-white);
}

.calc__ratio {
  font-size: 13px;
  color: var(--color-fog-blue);
  padding-top: 2px;
}

.calc__ratio b {
  color: var(--color-bone-white);
  font-weight: var(--font-weight-regular);
}

.calc__note {
  font-size: 13px;
  color: var(--color-fog-blue);
  line-height: 1.5;
}

.calc__note b {
  color: var(--color-bone-white);
  font-weight: var(--font-weight-regular);
}