.tire-calculator {
  position: relative;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(255, 255, 255, 0.98)),
    radial-gradient(circle at 10% 0%, rgba(220, 38, 48, 0.08), transparent 34%),
    linear-gradient(rgba(15, 23, 42, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, 0.07) 1px, transparent 1px);
  background-size: auto, auto, 72px 72px, 72px 72px;
}

.tire-calculator-heading p {
  max-width: 560px;
}

.tire-calculator-card {
  background: #ffffff;
  border: 1px solid rgba(15, 23, 42, 0.1);
  border-radius: 28px;
  box-shadow: 0 28px 70px rgba(15, 23, 42, 0.12);
  padding: 28px;
  overflow: hidden;
}

.calculator-tabs {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px;
  margin-bottom: 24px;
  background: #f4f5f7;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 999px;
}

.calculator-tab {
  border: 0;
  border-radius: 999px;
  padding: 12px 18px;
  color: #111317;
  background: transparent;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  transition: background 180ms ease, color 180ms ease, box-shadow 180ms ease;
}

.calculator-tab.is-active {
  color: #ffffff;
  background: #df1f2d;
  box-shadow: 0 14px 28px rgba(223, 31, 45, 0.22);
}

.calculator-panel {
  display: none;
}

.calculator-panel.is-active {
  display: block;
}

.calculator-form,
.alternative-form {
  display: grid;
  gap: 20px;
}

.calculator-form {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  column-gap: 18px;
}

.calculator-form::before,
.alternative-form::before {
  content: "Example: 225 / 60 R17";
  grid-column: 1 / -1;
  display: inline-flex;
  width: fit-content;
  padding: 8px 12px;
  border: 1px solid rgba(223, 31, 45, 0.18);
  border-radius: 999px;
  background: rgba(223, 31, 45, 0.07);
  color: #b91c1c;
  font-size: 0.9rem;
  font-weight: 800;
}

.alternative-intro {
  margin: 0;
  max-width: 760px;
  color: #626a76;
  font-size: 0.98rem;
  line-height: 1.65;
}

.tire-size-input-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 12px;
  align-items: end;
}

.calculator-form .tire-size-input-row {
  grid-column: 1 / 2;
}

.tire-size-input-row label,
.alternative-size-group label {
  display: grid;
  gap: 8px;
  color: #111317;
  font-weight: 800;
}

.tire-size-input-row label span,
.alternative-size-group label span {
  color: #626a76;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.tire-size-input-row input,
.alternative-size-group input {
  width: 100%;
  min-height: 58px;
  border: 1px solid rgba(15, 23, 42, 0.16);
  border-radius: 16px;
  background: #fbfbfc;
  color: #111317;
  font: inherit;
  font-size: 1.15rem;
  font-weight: 800;
  padding: 0 16px;
  outline: none;
  transition: border-color 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.tire-size-input-row input:focus,
.alternative-size-group input:focus {
  border-color: rgba(223, 31, 45, 0.75);
  background: #ffffff;
  box-shadow: 0 0 0 4px rgba(223, 31, 45, 0.12);
}

.size-separator {
  display: grid;
  place-items: center;
  min-height: 58px;
  color: #111317;
  font-size: 1.25rem;
  font-weight: 900;
}

.calculator-button {
  justify-self: start;
  border: 0;
  cursor: pointer;
}

.calculator-form .calculator-button {
  grid-column: 2 / 3;
  min-height: 58px;
  white-space: nowrap;
}

.calculator-message {
  min-height: 1.4em;
  margin: 0;
  color: #b91c1c;
  font-weight: 700;
}

.calculator-form .calculator-message {
  grid-column: 1 / -1;
}

.calculator-results,
.alternative-results {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.calculator-results {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.alternative-results {
  grid-template-columns: 1fr;
}

.result-box {
  min-height: 104px;
  padding: 18px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 18px;
  background: linear-gradient(180deg, #ffffff, #f8f9fb);
}

.result-box span {
  display: block;
  margin-bottom: 8px;
  color: #626a76;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.result-box strong {
  display: block;
  color: #111317;
  font-size: 1.05rem;
  line-height: 1.35;
}

.alternative-size-group {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 12px;
  align-items: end;
  padding: 18px;
  border: 1px solid rgba(15, 23, 42, 0.1);
  border-radius: 20px;
  background: #fbfbfc;
}

.alternative-guidance-note,
.alternative-fitment-warning {
  margin: 0;
  padding: 16px 18px;
  border: 1px solid rgba(223, 31, 45, 0.14);
  border-left: 4px solid #df1f2d;
  border-radius: 16px;
  background: rgba(223, 31, 45, 0.06);
  color: #4f5663;
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.55;
}

.alternative-fitment-warning {
  background: #fbfbfc;
  border-color: rgba(15, 23, 42, 0.1);
  border-left-color: #111317;
  color: #3f4652;
}

.wheel-filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 8px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 18px;
  background: #f4f5f7;
}

.wheel-filter-tab {
  border: 0;
  border-radius: 999px;
  padding: 10px 14px;
  background: transparent;
  color: #111317;
  font: inherit;
  font-size: 0.92rem;
  font-weight: 900;
  cursor: pointer;
  transition: background 180ms ease, color 180ms ease, box-shadow 180ms ease;
}

.wheel-filter-tab.is-active {
  background: #df1f2d;
  color: #ffffff;
  box-shadow: 0 12px 24px rgba(223, 31, 45, 0.2);
}

.alternative-table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid rgba(15, 23, 42, 0.1);
  border-radius: 20px;
  background: #ffffff;
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.07);
}

.alternative-size-table {
  width: 100%;
  min-width: 980px;
  border-collapse: collapse;
  color: #111317;
}

.alternative-size-table th,
.alternative-size-table td {
  padding: 15px 16px;
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
  text-align: left;
  vertical-align: middle;
}

.alternative-size-table th {
  background: #111317;
  color: #ffffff;
  font-size: 0.74rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.alternative-size-table td {
  font-size: 0.95rem;
  font-weight: 800;
}

.alternative-size-table tbody tr:last-child td {
  border-bottom: 0;
}

.alternative-size-table tbody tr.is-original-size td {
  background: rgba(15, 23, 42, 0.04);
}

.alternative-size-table tbody tr.is-closest-size td {
  background: rgba(223, 31, 45, 0.07);
}

.alternative-size-table td strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1rem;
}

.table-badge-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.alternative-status,
.alternative-fitment-note {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 9px;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.alternative-status {
  color: #ffffff;
  background: #df1f2d;
}

.alternative-status.original-status {
  color: #111317;
  background: #e5e7eb;
}

.alternative-fitment-note {
  color: #4f5663;
  background: #eef0f3;
}

.alternative-empty-state {
  margin: 0;
  padding: 18px;
  border: 1px solid rgba(15, 23, 42, 0.1);
  border-radius: 18px;
  background: #fbfbfc;
  color: #4f5663;
  font-weight: 800;
}

.alternative-safety-note {
  margin: 22px 0 0;
  padding: 16px 18px;
  border-left: 4px solid #df1f2d;
  border-radius: 16px;
  background: rgba(223, 31, 45, 0.07);
  color: #4f5663;
  font-size: 0.95rem;
  line-height: 1.6;
}

.tire-width-guide {
  margin-top: 0;
  padding: 22px;
  border: 1px solid rgba(15, 23, 42, 0.1);
  border-radius: 22px;
  background: linear-gradient(180deg, #ffffff, #fbfbfc);
  box-shadow: 0 18px 44px rgba(15, 23, 42, 0.08);
}

.tire-width-guide h3 {
  margin: 0 0 10px;
  color: #111317;
  font-size: clamp(1.35rem, 2.2vw, 1.85rem);
  line-height: 1.12;
}

.tire-width-guide-intro,
.tire-width-guide-note,
.tire-width-guide-disclaimer {
  margin: 0;
  color: #4f5663;
  font-size: 0.95rem;
  line-height: 1.6;
}

.tire-width-guide-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 18px 0;
}

.tire-width-card {
  padding: 18px;
  border: 1px solid rgba(15, 23, 42, 0.09);
  border-radius: 18px;
  background: #ffffff;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.05);
}

.tire-width-card h4 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  color: #111317;
  font-size: 1.08rem;
  line-height: 1.2;
}

.tire-width-card h4::before {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #df1f2d;
  box-shadow: 0 0 0 5px rgba(223, 31, 45, 0.12);
}

.tire-width-card strong {
  display: block;
  margin: 14px 0 8px;
  color: #111317;
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.tire-width-card strong:first-of-type {
  margin-top: 0;
}

.tire-width-card ul {
  display: grid;
  gap: 7px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: #4f5663;
  font-size: 0.94rem;
  line-height: 1.45;
}

.tire-width-card li {
  position: relative;
  padding-left: 20px;
}

.tire-width-card li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: #df1f2d;
  font-weight: 900;
}

.tire-width-card p {
  margin: 0;
  color: #4f5663;
  font-size: 0.94rem;
  line-height: 1.55;
}

.tire-width-guide-note {
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(223, 31, 45, 0.06);
  font-weight: 700;
}

.tire-width-guide-disclaimer {
  margin-top: 12px;
  font-weight: 800;
}

.calculator-disclaimer {
  margin: 22px 0 0;
  color: #626a76;
  font-size: 0.95rem;
  line-height: 1.6;
}

.guide-calculator {
  margin: 34px 0;
  padding: 0;
  background: transparent;
}

.guide-calculator .calculator-section-heading {
  margin-bottom: 20px;
}

.guide-calculator .calculator-section-heading h2 {
  margin: 8px 0 10px;
}

.guide-calculator .calculator-section-heading p:last-child {
  color: #626a76;
}

@media (max-width: 1100px) {
  .calculator-form {
    grid-template-columns: 1fr;
  }

  .calculator-form .tire-size-input-row,
  .calculator-form .calculator-button,
  .calculator-form .calculator-message {
    grid-column: 1 / -1;
  }

  .calculator-results {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .tire-calculator-card {
    padding: 22px;
    border-radius: 22px;
  }

  .calculator-results {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .tire-width-guide-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .calculator-tabs {
    display: grid;
    width: 100%;
    border-radius: 20px;
  }

  .calculator-tab {
    border-radius: 16px;
  }

  .tire-size-input-row,
  .alternative-size-group {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .calculator-form::before,
  .alternative-form::before {
    width: auto;
    justify-content: center;
    text-align: center;
  }

  .size-separator {
    min-height: auto;
    justify-content: start;
    padding-left: 4px;
  }

  .calculator-button,
  .calculator-form .calculator-button {
    width: 100%;
    justify-content: center;
  }

  .result-box {
    min-height: auto;
  }

  .alternative-table-wrap {
    border-radius: 16px;
  }

  .alternative-size-table {
    min-width: 840px;
  }

  .alternative-size-table th,
  .alternative-size-table td {
    padding: 13px 14px;
  }

  .tire-width-guide {
    padding: 18px;
    border-radius: 18px;
  }
}