/* =====================================================================
   ASTRAL — peptide calculator (peptide-calculator.html only)
   Tokens come from css/styles.css; no raw colors here. The reading sits on
   the inverse surface, so its accents are mixed toward --inverse-fg to stay
   legible in both themes.

   Built on a 4px scale with one small radius system (--radius, and
   --radius-sm when nested): no pills inside the tool. Compact controls keep
   a 44px touch target through an invisible ::before hit area.
   ===================================================================== */

.calc-hero__lede {
  margin-top: 12px;
}

/* ---------- layout ---------- */

/* Same 7/5 grid as the video section below, so the two columns align. */
.calc {
  display: grid;
  gap: 32px;
  align-items: start;
}

@media (min-width: 960px) {
  .calc {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 64px;
  }

  .calc-result {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

/* ---------- the form: flat, divided by hairlines ---------- */

.calc-form {
  margin: 0;
}

.calc-field {
  padding-block: 20px;
  border-top: 1px solid var(--line);
}

.calc-field:first-child {
  padding-top: 0;
  border-top: 0;
}

.calc-field:last-child {
  padding-bottom: 0;
}

.calc-field__head {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 28px;
}

.calc-field__n {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--accent);
}

.calc-field__label {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.calc-field__hint {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.45;
  color: var(--muted);
}

.calc-field__error {
  margin: 8px 0 0;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-ink);
}

/* shared hit-area expansion for compact controls */
.calc-chip,
.calc-unit button,
.calc-capacity__options button {
  position: relative;
}

.calc-chip::before,
.calc-unit button::before,
.calc-capacity__options button::before {
  content: "";
  position: absolute;
  inset: -6px 0;
}

.calc-unit button::before,
.calc-capacity__options button::before {
  inset: -10px 0;
}

/* mcg ⇄ mg */
.calc-unit {
  display: inline-flex;
  margin-left: auto;
  padding: 2px;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
}

.calc-unit button {
  min-width: 40px;
  height: 24px;
  padding: 0 8px;
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-3);
  background: transparent;
  border: 0;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background .15s var(--ease), color .15s var(--ease);
}

.calc-unit button:hover {
  color: var(--ink);
}

.calc-unit button.is-on {
  color: var(--paper);
  background: var(--ink);
}

/* the number itself */
.calc-input {
  position: relative;
}

.calc-input input {
  width: 100%;
  height: 48px;
  padding: 0 48px 0 14px;
  font: inherit;
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -.01em;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  background: var(--surface-strong);
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  transition: border-color .15s var(--ease), box-shadow .15s var(--ease);
}

.calc-input input::placeholder {
  color: var(--line-2);
}

.calc-input input:hover {
  border-color: var(--ink-3);
}

.calc-input input:focus {
  outline: none;
  border-color: var(--ink);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.calc-field.is-invalid .calc-input input {
  border-color: var(--accent);
}

.calc-input__unit {
  position: absolute;
  top: 50%;
  right: 14px;
  font-size: 14px;
  color: var(--muted);
  transform: translateY(-50%);
  pointer-events: none;
}

/* quick picks: one even row, numbers only — the unit is on the field */
.calc-chips {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(0, 1fr);
  gap: 6px;
  margin-top: 8px;
}

.calc-chip {
  height: 32px;
  padding: 0 4px;
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  color: var(--ink-2);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background .15s var(--ease), color .15s var(--ease), border-color .15s var(--ease);
}

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

.calc-chip:hover {
  color: var(--ink);
  border-color: var(--ink-3);
}

.calc-chip:active {
  transform: translateY(1px);
}

.calc-chip.is-on {
  color: var(--paper);
  background: var(--ink);
  border-color: var(--ink);
}

/* ---------- the reading ---------- */

.calc-result {
  padding: 24px;
  color: var(--inverse-fg);
  background: var(--inverse-bg);
  border: 1px solid color-mix(in srgb, var(--inverse-fg) 9%, transparent);
  border-radius: var(--radius-lg);
}

@media (min-width: 960px) {
  .calc-result {
    padding: 28px;
  }
}

.calc-result__eyebrow {
  margin-bottom: 16px;
  color: var(--inverse-muted);
}

.calc-result__draw {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 0;
}

.calc-result__lead {
  font-size: 13px;
  color: var(--inverse-muted);
}

.calc-result__figure {
  font-size: clamp(2.5rem, 4.5vw, 3.25rem);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
}

.calc-result__unit {
  font-size: .4em;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--inverse-muted);
}

.calc-syringe {
  --calc-fill: 0;
  margin: 16px -4px 4px;
}

.calc-syringe__art {
  display: block;
  width: 100%;
  height: auto;
  overflow: hidden;
}

.calc-syringe__needle,
.calc-syringe__hub,
.calc-syringe__flange {
  fill: color-mix(in srgb, var(--inverse-fg) 46%, transparent);
}

.calc-syringe__barrel {
  fill: color-mix(in srgb, var(--inverse-fg) 4%, transparent);
  stroke: color-mix(in srgb, var(--inverse-fg) 58%, transparent);
  stroke-width: 2;
}

.calc-syringe__fill {
  fill: color-mix(in srgb, var(--accent) 76%, var(--inverse-fg));
  transform-box: fill-box;
  transform-origin: left center;
  transform: scaleX(var(--calc-fill));
  transition: transform .4s var(--ease), fill .2s var(--ease);
}

.calc-syringe.is-over .calc-syringe__fill {
  fill: var(--gold);
}

/* translate distance = GEO.span in js/peptide-calculator.js (user units) */
.calc-syringe__plunger {
  transform: translateX(calc(var(--calc-fill) * 500px));
  transition: transform .4s var(--ease);
}

.calc-syringe__stopper {
  fill: var(--inverse-muted);
}

.calc-syringe__rod {
  fill: color-mix(in srgb, var(--inverse-fg) 24%, transparent);
}

.calc-syringe__tick {
  stroke: color-mix(in srgb, var(--inverse-fg) 50%, transparent);
  stroke-width: 1.5;
}

.calc-syringe__tick.is-major {
  stroke: color-mix(in srgb, var(--inverse-fg) 88%, transparent);
  stroke-width: 2;
}

.calc-syringe__label {
  font-family: var(--font-sans);
  font-size: 24px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  fill: var(--inverse-muted);
}

/* syringe size */
.calc-capacity {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
}

.calc-capacity__label {
  font-size: 12px;
  color: var(--inverse-muted);
}

.calc-capacity__options {
  display: inline-flex;
  padding: 2px;
  border: 1px solid color-mix(in srgb, var(--inverse-fg) 20%, transparent);
  border-radius: var(--radius);
}

.calc-capacity__options button {
  min-width: 52px;
  height: 24px;
  padding: 0 8px;
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--inverse-muted);
  background: transparent;
  border: 0;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background .15s var(--ease), color .15s var(--ease);
}

.calc-capacity__options button:hover {
  color: var(--inverse-fg);
}

.calc-capacity__options button.is-on {
  color: var(--inverse-bg);
  background: var(--inverse-fg);
}

.calc-result__state {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--inverse-muted);
}

.calc-result__state.is-warn {
  color: var(--gold);
}

.calc-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 16px 0 0;
  border-top: 1px solid color-mix(in srgb, var(--inverse-fg) 14%, transparent);
}

.calc-facts > div {
  padding: 12px 0;
  border-bottom: 1px solid color-mix(in srgb, var(--inverse-fg) 14%, transparent);
}

.calc-facts > div:nth-child(odd) {
  padding-right: 12px;
}

.calc-facts > div:nth-child(even) {
  padding-left: 12px;
  border-left: 1px solid color-mix(in srgb, var(--inverse-fg) 14%, transparent);
}

.calc-facts dt {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--inverse-muted);
}

.calc-facts dd {
  margin: 4px 0 0;
  font-size: 16px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

.calc-result__ruo {
  margin: 12px 0 0;
  font-size: 12px;
  line-height: 1.5;
  color: var(--inverse-muted);
}

/* ---------- phones: the reading, docked ---------- */

.calc-dock {
  display: none;
}

@media (max-width: 959.98px) {
  .calc-dock {
    position: fixed;
    right: max(16px, env(safe-area-inset-right));
    bottom: calc(12px + env(safe-area-inset-bottom));
    left: max(16px, env(safe-area-inset-left));
    z-index: 55;
    display: block;
    visibility: hidden;
    opacity: 0;
    transform: translateY(calc(100% + 24px));
    transition: transform .25s var(--ease), opacity .25s var(--ease), visibility 0s linear .25s;
  }

  .calc-dock.is-shown.is-ready {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
    transition: transform .25s var(--ease), opacity .25s var(--ease), visibility 0s;
  }
}

.calc-dock__btn {
  display: flex;
  align-items: baseline;
  gap: 8px;
  width: 100%;
  min-height: 48px;
  padding: 12px 16px;
  font: inherit;
  text-align: left;
  color: var(--inverse-fg);
  background: var(--inverse-bg);
  border: 0;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  cursor: pointer;
}

.calc-dock__lead,
.calc-dock__ml {
  font-size: 13px;
  color: var(--inverse-muted);
  font-variant-numeric: tabular-nums;
}

.calc-dock__num {
  font-size: 17px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.calc-dock__chev {
  align-self: center;
  width: 18px;
  height: 18px;
  margin-left: auto;
  color: var(--inverse-muted);
}

/* ---------- video + units primer ---------- */

.calc-learn {
  display: grid;
  gap: 48px;
  align-items: start;
}

@media (min-width: 960px) {
  .calc-learn {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 64px;
  }
}

.calc-learn .eyebrow {
  margin-bottom: 16px;
}

.calc-learn .h2 {
  margin: 0;
  font-size: clamp(1.5rem, 2.4vw, 2rem);
}

.calc-learn__lede {
  margin-top: 12px;
}

.calc-video {
  position: relative;
  aspect-ratio: 4 / 3;
  margin-top: 20px;
  overflow: hidden;
  background: var(--inverse-bg);
  border-radius: var(--radius-lg);
}

.calc-video__poster,
.calc-video iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.calc-video__poster {
  object-fit: cover;
  filter: saturate(.72) contrast(1.02);
}

.calc-video__play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  gap: 12px;
  padding: 16px;
  font: inherit;
  color: var(--inverse-fg);
  background: linear-gradient(to top, color-mix(in srgb, var(--inverse-bg) 72%, transparent), transparent 52%);
  border: 0;
  cursor: pointer;
}

.calc-video__icon {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  color: var(--ink);
  background: var(--paper);
  border-radius: 50%;
  box-shadow: var(--shadow);
  transform: translate(-50%, -50%);
  transition: transform .25s var(--ease);
}

.calc-video__icon svg {
  width: 22px;
  height: 22px;
  margin-left: 3px;
}

.calc-video__play:hover .calc-video__icon {
  transform: translate(-50%, -50%) scale(1.06);
}

.calc-video__play:active .calc-video__icon {
  transform: translate(-50%, -50%) scale(.98);
}

.calc-video__label {
  font-size: 13px;
  font-weight: 600;
}

.calc-video__time {
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--inverse-muted);
}

.calc-learn__body {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink-2);
}

.calc-learn__units .h2 + .calc-learn__body {
  margin-top: 16px;
}

.calc-scale {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.calc-scale__row {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) 72px;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.calc-scale__row:last-child {
  border-bottom: 1px solid var(--line);
}

.calc-scale__size {
  font-size: 13px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.calc-scale__bar {
  position: relative;
  height: 6px;
  background: var(--paper-3);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.calc-scale__mark {
  position: absolute;
  inset: 0 auto 0 0;
  background: var(--accent);
  border-radius: var(--radius-sm);
}

.calc-scale__row--30 .calc-scale__mark { width: 30%; }
.calc-scale__row--50 .calc-scale__mark { width: 50%; }
.calc-scale__row--100 .calc-scale__mark { width: 100%; }

.calc-scale__cap {
  font-size: 12px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

/* ---------- closing band ---------- */

.calc-cta .eyebrow {
  color: var(--gold);
}

.calc-cta__title {
  max-width: 20ch;
  margin: 0 0 16px;
}

.calc-cta__lede {
  max-width: 52ch;
  margin-bottom: 28px;
  color: var(--inverse-muted);
}

.calc-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.calc-cta__ghost {
  --fg: var(--inverse-fg);
  --bd: color-mix(in srgb, var(--inverse-fg) 35%, transparent);
}

@media (max-width: 559.98px) {
  .calc-cta__actions .btn {
    width: 100%;
  }
}

/* ---------- focus + motion ---------- */

.calc-chip:focus-visible,
.calc-unit button:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

.calc-capacity__options button:focus-visible,
.calc-dock__btn:focus-visible {
  outline: 2px solid var(--inverse-fg);
  outline-offset: 2px;
}

.calc-video__play:focus-visible {
  outline: 2px solid var(--inverse-fg);
  outline-offset: -6px;
}

@media (prefers-reduced-motion: reduce) {
  .calc-syringe__fill,
  .calc-syringe__plunger,
  .calc-dock,
  .calc-dock.is-shown.is-ready,
  .calc-chip,
  .calc-unit button,
  .calc-capacity__options button,
  .calc-video__icon,
  .calc-input input {
    transition: none;
  }

  .calc-chip:active {
    transform: none;
  }
}