* {
  box-sizing: border-box;
}

.calculator-page {
  --calculator-accent: #006a70;
  --calculator-accent-hover: #00555a;
  --calculator-accent-text: #ffffff;
  min-width: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 50% -10%, rgba(var(--primary-rgb), 0.14), transparent 30rem),
    var(--surface);
}

html.dark .calculator-page {
  --calculator-accent: #a8d3e7;
  --calculator-accent-hover: #c6e4f2;
  --calculator-accent-text: #1d2b2d;
}

.calculator-page [hidden] {
  display: none !important;
}

.calculator-header {
  position: sticky;
  inset-block-start: 0;
  z-index: 30;
  border-block-end: 1px solid rgba(var(--surface-text-rgb), 0.1);
  background: var(--surface);
  box-shadow: 0 0.25rem 1.25rem rgba(0, 0, 0, 0.06);
}

.calculator-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(100% - 2rem, 72rem);
  min-height: 4.5rem;
  margin-inline: auto;
}

.calculator-brand {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  gap: 0.65rem;
  border-radius: 0.75rem;
  color: var(--surface-text);
  text-decoration: none;
}

.calculator-brand img {
  flex: 0 0 auto;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.65rem;
}

.calculator-brand .logo-text {
  overflow-wrap: anywhere;
  font-family: var(--header-font);
  font-size: clamp(1.15rem, 5vw, 1.5rem);
  font-weight: 700;
}

.calculator-header__controls {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 0.35rem;
}

.calculator-icon-button,
.calculator-page .language-switcher__button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  min-width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  border: 0;
  border-radius: 0.75rem;
  background: transparent;
  color: var(--surface-text);
  cursor: pointer;
}

.calculator-icon-button:hover,
.calculator-page .language-switcher__button:hover,
.calculator-page .language-switcher__button[aria-expanded="true"] {
  background: rgba(var(--primary-rgb), 0.14);
}

.calculator-icon-button .sun-icon {
  display: none;
}

html.dark .calculator-icon-button .sun-icon {
  display: block;
}

html.dark .calculator-icon-button .moon-icon {
  display: none;
}

.calculator-main {
  width: min(100% - 2rem, 72rem);
  min-width: 0;
  margin-inline: auto;
  padding-block: clamp(2.5rem, 7vw, 5rem);
}

.calculator-intro {
  width: min(100%, 46rem);
  margin-inline: auto;
  margin-block-end: clamp(1.75rem, 5vw, 3rem);
  text-align: center;
}

.calculator-eyebrow {
  margin: 0 0 0.6rem;
  color: var(--calculator-accent);
  font-family: var(--header-font);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.calculator-intro h1 {
  margin: 0;
  overflow-wrap: anywhere;
  color: var(--surface-text);
  font-size: clamp(2rem, 8vw, 3.75rem);
  font-weight: 800;
  line-height: 1.08;
}

.calculator-intro > p:last-child {
  margin: 1rem auto 0;
  color: rgba(var(--surface-text-rgb), 0.76);
  font-size: clamp(1rem, 3vw, 1.15rem);
  line-height: 1.65;
}

.calculator-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
  gap: 1.25rem;
  width: min(100%, 44rem);
  min-width: 0;
  margin-inline: auto;
}

.calculator-result-slot {
  min-width: 0;
}

.calculator-card {
  min-width: 0;
  padding: clamp(1.1rem, 4vw, 2rem);
  border: 1px solid var(--outline);
  border-radius: 1.25rem;
  background: var(--surface);
  box-shadow: 0 1rem 2.75rem rgba(0, 0, 0, 0.08);
}

.calculator-field {
  min-width: 0;
  margin-block-end: 1.35rem;
}

.calculator-field label,
.unit-selector legend {
  display: block;
  margin-block-end: 0.5rem;
  color: var(--surface-text);
  font-family: var(--header-font);
  font-size: 0.95rem;
  font-weight: 700;
}

.calculator-field input {
  display: block;
  width: 100%;
  min-width: 0;
  min-height: 3rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--outline);
  border-radius: 0.75rem;
  background: var(--surface);
  color: var(--surface-text);
  font-size: 1rem;
  line-height: 1.35;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.calculator-field input::placeholder {
  color: rgba(var(--surface-text-rgb), 0.52);
  opacity: 1;
}

.calculator-field input[aria-invalid="true"] {
  border-color: #c24141;
  box-shadow: 0 0 0 1px #c24141;
}

.calculator-help,
.calculator-error {
  margin: 0.45rem 0 0;
  overflow-wrap: anywhere;
  font-size: 0.86rem;
  line-height: 1.45;
}

.calculator-help {
  color: rgba(var(--surface-text-rgb), 0.68);
}

.calculator-error {
  color: #b42318;
  font-weight: 500;
}

html.dark .calculator-error {
  color: #ffb4aa;
}

.unit-selector {
  min-width: 0;
  margin: 0 0 1.5rem;
  padding: 0;
  border: 0;
}

.unit-selector__options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.65rem;
}

.unit-option {
  display: flex;
  align-items: center;
  min-width: 0;
  min-height: 3rem;
  gap: 0.55rem;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--outline);
  border-radius: 0.75rem;
  background: rgba(var(--surface-text-rgb), 0.025);
  color: var(--surface-text);
  cursor: pointer;
  line-height: 1.3;
}

.unit-option:has(input:checked) {
  border-color: var(--calculator-accent);
  background: rgba(var(--primary-rgb), 0.13);
}

.unit-option input {
  flex: 0 0 auto;
  width: 1.1rem;
  height: 1.1rem;
  margin: 0;
  accent-color: var(--calculator-accent);
}

.unit-option span {
  min-width: 0;
  overflow-wrap: anywhere;
}

.calculator-primary-button,
.calculator-secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 3rem;
  padding: 0.75rem 1.1rem;
  border-radius: 0.75rem;
  font-family: var(--header-font);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.25;
  text-align: center;
  cursor: pointer;
  transition: transform 0.18s ease, background-color 0.18s ease, border-color 0.18s ease;
}

.calculator-primary-button {
  border: 1px solid var(--calculator-accent);
  background: var(--calculator-accent);
  color: var(--calculator-accent-text);
}

.calculator-secondary-button {
  margin-block-start: 1.25rem;
  border: 1px solid var(--calculator-accent);
  background: transparent;
  color: var(--calculator-accent);
}

.calculator-primary-button:hover,
.calculator-secondary-button:hover {
  transform: translateY(-1px);
}

.calculator-primary-button:hover {
  border-color: var(--calculator-accent-hover);
  background: var(--calculator-accent-hover);
}

.calculator-secondary-button:hover {
  background: rgba(var(--primary-rgb), 0.12);
}

.calculator-status {
  min-height: 1.35rem;
  margin: 0.8rem 0 0;
  overflow-wrap: anywhere;
  color: var(--calculator-accent);
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
}

.calculator-result-card {
  outline: none;
}

.calculator-result-card h2,
.percentage-section h3 {
  margin: 0;
  color: var(--surface-text);
  font-weight: 700;
}

.calculator-result-card h2 {
  font-size: clamp(1.15rem, 4vw, 1.4rem);
}

.one-rm-result {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem;
  margin-block: 0.55rem 0.7rem;
  color: var(--calculator-accent);
  font-family: var(--header-font);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

#one-rm-value {
  min-width: 0;
  overflow-wrap: anywhere;
  font-family: inherit;
  font-size: clamp(3rem, 16vw, 5.5rem);
  font-weight: 800;
}

#one-rm-unit {
  font-size: clamp(1.15rem, 5vw, 1.75rem);
  font-weight: 700;
}

.result-summary {
  margin: 0;
  overflow-wrap: anywhere;
  color: rgba(var(--surface-text-rgb), 0.72);
  line-height: 1.55;
}

.percentage-section {
  min-width: 0;
  margin-block-start: 1.75rem;
}

.percentage-section h3 {
  margin-block-end: 0.75rem;
  font-size: 1.05rem;
}

.percentage-table-wrap {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--outline);
  border-radius: 0.8rem;
}

.percentage-table {
  width: 100%;
  table-layout: fixed;
  border-collapse: collapse;
  color: var(--surface-text);
  font-variant-numeric: tabular-nums;
}

.percentage-table th,
.percentage-table td {
  width: 50%;
  padding: 0.62rem clamp(0.55rem, 2vw, 0.85rem);
  overflow-wrap: anywhere;
  border-block-end: 1px solid rgba(var(--surface-text-rgb), 0.1);
  line-height: 1.25;
  text-align: start;
  vertical-align: middle;
}

.percentage-table thead th {
  background: rgba(var(--primary-rgb), 0.12);
  font-family: var(--header-font);
  font-size: 0.78rem;
  font-weight: 700;
}

.percentage-table tbody th {
  font-weight: 500;
}

.percentage-table tbody td {
  font-weight: 700;
}

.percentage-table tbody tr:last-child th,
.percentage-table tbody tr:last-child td {
  border-block-end: 0;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.calculator-page a:focus-visible,
.calculator-page button:focus-visible,
.calculator-page input:focus-visible,
.calculator-page .unit-option:focus-within,
.calculator-result-card:focus-visible {
  outline: 3px solid var(--calculator-accent);
  outline-offset: 3px;
}

.calculator-page input:focus-visible {
  border-color: var(--calculator-accent);
  box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.2);
}

[dir="rtl"] .calculator-page .language-switcher__menu {
  right: auto;
  left: 0;
}

[dir="rtl"] .one-rm-result {
  direction: rtl;
  justify-content: flex-start;
}

[dir="rtl"] .percentage-table th,
[dir="rtl"] .percentage-table td {
  text-align: right;
}

.calculator-app-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(100% - 2rem, 72rem);
  margin: clamp(1rem, 4vw, 2.5rem) auto 0;
  padding: clamp(1rem, 3vw, 1.5rem);
  color: var(--surface-text);
  background: color-mix(in srgb, var(--surface) 92%, var(--primary) 8%);
  border: 1px solid var(--outline);
  border-radius: 1rem;
  text-align: start;
  overflow-wrap: anywhere;
}

.calculator-app-cta__copy {
  min-width: 0;
}

.calculator-app-cta h2,
.calculator-app-cta p {
  margin: 0;
}

.calculator-app-cta h2 {
  font-family: var(--header-font);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  font-weight: 600;
  line-height: 1.25;
}

.calculator-app-cta p {
  margin-block-start: 0.45rem;
  color: rgba(var(--surface-text-rgb), 0.78);
  font-size: 0.9rem;
  line-height: 1.45;
}

.calculator-app-cta__button {
  flex: 0 0 auto;
  min-height: 2.75rem;
  padding: 0.65rem 1rem;
  color: var(--primary-text);
  background: var(--primary);
  border: 1px solid var(--primary);
  border-radius: 0.65rem;
  font-family: var(--header-font);
  font-size: 0.85rem;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
}

.calculator-app-cta__button:hover {
  filter: brightness(0.94);
}

html.dark .calculator-app-cta {
  background: color-mix(in srgb, var(--surface) 88%, var(--primary) 12%);
}

.calculator-page + #footer,
#footer {
  margin-block-start: clamp(1rem, 4vw, 3rem);
}

@media (min-width: 58rem) {
  .calculator-shell {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0fr);
    column-gap: 0;
  }

  .calculator-shell.is-ready {
    transition: width 420ms ease, grid-template-columns 420ms ease, column-gap 420ms ease;
  }

  .calculator-shell.has-result {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
    width: min(100%, 66rem);
    column-gap: 1.5rem;
  }

  .calculator-result-slot {
    min-width: 0;
    overflow: hidden;
    visibility: hidden;
  }

  .calculator-shell.has-result .calculator-result-slot {
    overflow: visible;
    visibility: visible;
  }

  .calculator-result-card {
    min-height: 100%;
    opacity: 0;
    transform: translateY(0.75rem);
    visibility: hidden;
    pointer-events: none;
  }

  .calculator-shell.is-ready .calculator-result-card {
    transition: opacity 280ms ease 140ms, transform 280ms ease 140ms, visibility 0s linear 140ms;
  }

  .calculator-shell.has-result .calculator-result-card {
    opacity: 1;
    transform: translateY(0);
    visibility: visible;
    pointer-events: auto;
  }
}

@media (max-width: 36rem) {
  .calculator-header__inner,
  .calculator-main {
    width: min(100% - 1.25rem, 72rem);
  }

  .calculator-header__inner {
    min-height: 4rem;
  }

  .calculator-brand .logo-text {
    display: none;
  }

  .calculator-card {
    border-radius: 1rem;
  }

  .calculator-app-cta {
    flex-direction: column;
    align-items: stretch;
  }

  .calculator-app-cta__button {
    width: 100%;
  }

  .unit-selector__options {
    grid-template-columns: minmax(0, 1fr);
  }

  .percentage-table th,
  .percentage-table td {
    font-size: 0.88rem;
  }

  .calculator-page .language-switcher__menu {
    inset-inline-end: 0;
    max-width: calc(100vw - 1rem);
  }
}

@media print {
  .calculator-app-cta {
    color: #000000;
    background: #ffffff;
    border-color: #000000;
  }

  .calculator-app-cta__button {
    color: #000000;
    background: #ffffff;
    border-color: #000000;
  }
}

@media (prefers-reduced-motion: reduce) {
  .calculator-shell.is-ready,
  .calculator-shell.is-ready .calculator-result-card {
    transition: none !important;
  }

  .calculator-result-card,
  .calculator-shell.has-result .calculator-result-card {
    transform: none !important;
  }

  .calculator-app-cta {
    transition: none !important;
  }

  .calculator-page *,
  .calculator-page *::before,
  .calculator-page *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}