.calculator-hub {
  --hub-gold: #276cbc;
  --hub-gold-light: #d4c791;
  --hub-accent-gradient: linear-gradient(135deg, #276cbc 0%, #0d1654 100%);
  --hub-ink: #0d1654;
  --hub-ink-soft: #866c5f;
  --hub-line: rgba(13, 22, 84, .14);
  --hub-paper: #fcfbfa;
  --hub-cream: rgba(212, 199, 145, .16);
  --hub-cream-deep: rgba(212, 199, 145, .26);
  color: var(--hub-ink);
  background: var(--hub-cream);
  font-family: var(--font-body);
  min-height: 70vh;
  padding-top: 96px;
}

.calculator-hub *,
.calculator-hub *::before,
.calculator-hub *::after { box-sizing: border-box; }

.calculator-hub__mobile-picker { display: none; }

.calculator-hub__tabs {
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  gap: 12px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 36px clamp(20px, 3.9vw, 56px);
}

.calculator-hub__tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  min-width: 0;
  padding: 14px 12px;
  border: 1px solid var(--hub-line);
  border-radius: 5px;
  color: var(--hub-ink-soft);
  background: var(--hub-paper);
  font: 500 14px/1.2 var(--font-body);
  cursor: pointer;
  transition: color .18s ease, border-color .18s ease, background-color .18s ease, transform .18s ease;
}

.calculator-hub__tab span {
  color: var(--hub-ink-soft);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.calculator-hub__tab:hover {
  color: var(--hub-ink);
  border-color: var(--hub-gold);
  transform: translateY(-2px);
}

.calculator-hub__tab[aria-selected="true"] {
  color: #fff;
  border-color: var(--hub-ink);
  background: var(--hub-ink);
  transform: none;
}

.calculator-hub__tab[aria-selected="true"] span { color: var(--hub-gold-light); }

.calculator-hub__tab:focus-visible {
  outline: 2px solid var(--hub-gold);
  outline-offset: 3px;
}

.calculator-hub__panel { display: none; }
.calculator-hub__panel.is-active { display: block; }

.calculator-hub__intro {
  max-width: 860px;
  margin: 0 auto;
  padding: 60px 28px 22px;
  text-align: center;
}

.calculator-hub__eyebrow {
  margin-bottom: 18px;
  color: var(--hub-gold);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .28em;
  text-transform: uppercase;
}

.calculator-hub__intro h1 {
  color: var(--hub-ink);
  font-size: clamp(2rem, 4.6vw, 3.1rem);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -.035em;
}

.calculator-hub__intro h1 strong { font-weight: 600; }

.calculator-hub__intro > p:last-child {
  max-width: 52ch;
  margin: 18px auto 0;
  color: var(--hub-ink-soft);
  font-size: 1.05rem;
  font-weight: 300;
}

.calculator-hub__workspace {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 28px;
}

.calculator-hub__card {
  margin-bottom: 26px;
  padding: 38px 36px;
  border: 1px solid var(--hub-line);
  border-radius: 6px;
  background: var(--hub-paper);
}

.calculator-hub__step {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
  color: var(--hub-gold);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
}

.calculator-hub__step span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border: 1px solid var(--hub-gold);
  border-radius: 50%;
  letter-spacing: 0;
}

.calculator-hub__size {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 10px;
  margin: 6px 0 26px;
}

.calculator-hub__size input {
  width: 5.5ch;
  border: 0;
  color: var(--hub-ink);
  background: transparent;
  font: 300 4rem/1 var(--font-body);
  text-align: right;
  letter-spacing: -.04em;
}

.calculator-hub__size input:focus { color: var(--hub-gold); outline: 0; }
.calculator-hub__size span { color: var(--hub-ink-soft); font-size: 1.2rem; font-weight: 300; }

.calculator-hub input[type="range"] {
  width: 100%;
  height: 4px;
  margin: 8px 0;
  border-radius: 4px;
  outline: 0;
  background: var(--hub-cream-deep);
  appearance: none;
}

.calculator-hub input[type="range"]::-webkit-slider-thumb {
  width: 26px;
  height: 26px;
  border: 3px solid #fff;
  border-radius: 50%;
  background: var(--hub-accent-gradient);
  box-shadow: 0 2px 8px rgba(39, 108, 188, .35);
  cursor: pointer;
  appearance: none;
}

.calculator-hub input[type="range"]::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border: 3px solid #fff;
  border-radius: 50%;
  background: var(--hub-gold);
  cursor: pointer;
}

.calculator-hub__range-ends {
  display: flex;
  justify-content: space-between;
  margin-top: 2px;
  color: var(--hub-ink-soft);
  font-size: 12px;
}

.calculator-hub__tiers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.calculator-hub__tier {
  position: relative;
  padding: 24px 22px;
  border: 1px solid var(--hub-line);
  border-radius: 5px;
  color: var(--hub-ink);
  background: #fff;
  text-align: left;
  cursor: pointer;
  transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}

.calculator-hub__tier:hover { border-color: var(--hub-gold); transform: translateY(-2px); }
.calculator-hub__tier:focus-visible { outline: 2px solid var(--hub-gold); outline-offset: 3px; }

.calculator-hub__tier[aria-pressed="true"] {
  border-color: var(--hub-gold);
  box-shadow: 0 0 0 1px var(--hub-gold), 0 10px 26px rgba(39, 108, 188, .16);
  transform: none;
}

.calculator-hub__tier[aria-pressed="true"]::after {
  content: "✓";
  position: absolute;
  top: 16px;
  right: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  color: #fff;
  background: var(--hub-accent-gradient);
  font-size: 12px;
}

.calculator-hub__tier-name { margin-bottom: 4px; font-size: 1.25rem; font-weight: 500; }
.calculator-hub__tier-rate { margin-bottom: 14px; color: var(--hub-gold); font-size: 13px; font-weight: 600; }
.calculator-hub__tier-description { color: var(--hub-ink-soft); font-size: 13px; line-height: 1.55; }

.calculator-hub__total {
  padding: 40px 36px;
  border-radius: 6px;
  color: #fff;
  background: var(--hub-ink);
  text-align: center;
}

.calculator-hub__total-label {
  color: var(--hub-gold-light);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .26em;
  text-transform: uppercase;
}

.calculator-hub__amount {
  margin: 14px 0 6px;
  font-size: clamp(2.4rem, 7vw, 4rem);
  font-weight: 300;
  line-height: 1;
  letter-spacing: -.035em;
}

.calculator-hub__amount-separator { margin: 0 8px; color: #b9bbbd; font-size: 1.4rem; }
.calculator-hub__total-note { color: #b9bbbd; font-size: 13px; }
.calculator-hub__total-note strong { color: #fff; font-weight: 500; }

.calculator-hub__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 30px;
}

.calculator-hub__action {
  padding: 15px 30px;
  border: 1px solid transparent;
  border-radius: 3px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  transition: border-color .18s ease, filter .18s ease;
}

.calculator-hub__action--gold {
  color: #fff;
  background: var(--hub-accent-gradient);
  box-shadow: 0 4px 14px rgba(39, 108, 188, .35);
}

.calculator-hub__action--gold:hover { filter: brightness(1.06); }
.calculator-hub__action--ghost { color: #fff; border-color: rgba(255, 255, 255, .35); }
.calculator-hub__action--ghost:hover { border-color: #fff; }

.calculator-hub__disclaimer {
  max-width: 62ch;
  margin: 22px auto 70px;
  color: var(--hub-ink-soft);
  font-size: 11.5px;
  line-height: 1.55;
  text-align: center;
}

.calculator-hub__frame {
  display: block;
  width: 100%;
  min-height: 720px;
  border: 0;
  background: transparent;
}

@media (max-width: 1023px) {
  .calculator-hub { padding-top: 92px; }
  .calculator-hub__mobile-picker {
    position: sticky;
    top: 92px;
    z-index: 30;
    display: grid;
    grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
    align-items: end;
    gap: 16px;
    width: 100%;
    padding: 14px 20px 16px;
    border-bottom: 1px solid var(--hub-line);
    background: rgba(252, 251, 250, .96);
    box-shadow: 0 10px 24px rgba(13, 22, 84, .08);
    backdrop-filter: blur(14px);
  }
  .calculator-hub__mobile-picker-copy {
    display: flex;
    flex-direction: column;
    gap: 3px;
    min-width: 0;
  }
  .calculator-hub__mobile-picker-copy span {
    color: var(--hub-gold);
    font-size: 9px;
    font-weight: 700;
    letter-spacing: .16em;
    text-transform: uppercase;
  }
  .calculator-hub__mobile-picker-copy label {
    color: var(--hub-ink);
    font-size: 14px;
    font-weight: 600;
    line-height: 1.2;
  }
  .calculator-hub__select-wrap {
    position: relative;
    min-width: 0;
  }
  .calculator-hub__select-wrap::after {
    content: "";
    position: absolute;
    top: 50%;
    right: 16px;
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--hub-gold-light);
    border-bottom: 2px solid var(--hub-gold-light);
    transform: translateY(-70%) rotate(45deg);
    pointer-events: none;
  }
  .calculator-hub__select-wrap select {
    width: 100%;
    min-height: 52px;
    padding: 0 44px 0 16px;
    border: 1px solid var(--hub-ink);
    border-radius: 5px;
    color: #fff;
    background: var(--hub-ink);
    font: 600 15px/1.2 var(--font-body);
    appearance: none;
    cursor: pointer;
  }
  .calculator-hub__select-wrap select:focus-visible {
    outline: 3px solid rgba(39, 108, 188, .32);
    outline-offset: 2px;
  }
  .calculator-hub__tabs { display: none; }
  .calculator-hub__panel { scroll-margin-top: 172px; }
  .calculator-hub__tiers { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .calculator-hub { padding-top: 68px; }
  .calculator-hub__mobile-picker {
    top: 68px;
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .calculator-hub__panel { scroll-margin-top: 206px; }
  .calculator-hub__intro { padding: 48px 20px 22px; }
  .calculator-hub__workspace { padding: 0 20px; }
  .calculator-hub__card { padding: 28px 22px; }
  .calculator-hub__size input { font-size: 3.35rem; }
  .calculator-hub__total { padding: 34px 20px; }
  .calculator-hub__amount { font-size: clamp(2rem, 10vw, 3rem); }
  .calculator-hub__amount-separator { margin: 0 3px; }
}

@media (prefers-reduced-motion: reduce) {
  .calculator-hub__tab,
  .calculator-hub__tier,
  .calculator-hub__action { transition: none; }
}