/* ==========================================================================
   Page · D02 Product · PX planetary gearboxes
   ========================================================================== */

/* ---- Hero --------------------------------------------------------------- */

.product-hero {
  padding-top: 24px;
  padding-bottom: clamp(40px, 5vw, 72px);
}

.product-hero__breadcrumb {
  margin-bottom: clamp(24px, 4vw, 48px);
}

.product-hero__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 460px), 1fr));
  gap: 40px;
  align-items: center;
}

.product-hero__title {
  margin: 0 0 24px;
  font: 800 clamp(56px, 8.4vw, 136px)/.84 var(--f-display);
  text-transform: uppercase;
}

.product-hero__lead {
  margin-bottom: 12px;
  max-width: 36ch;
}

.product-hero__note {
  margin: 0 0 28px;
  font: 400 13px/1.5 var(--f-mono);
  color: var(--muted);
}

.product-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.product-hero__engineer {
  padding: 0 22px;
}

.trust-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 24px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
  font: 500 12px/1.4 var(--f-mono);
  color: var(--ink-2);
}

.trust-strip__stock {
  display: flex;
  gap: 6px;
  align-items: center;
}

.trust-strip__stock::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--sig-green);
}

/* ---- Exploded view ------------------------------------------------------
   Every part sits in a full-stage layer that slides sideways; --explode
   (0…1) is set on the stage by d02-product.js. Balloons and leader lines
   fade in once the assembly is more than 30 % apart (--labelled).
   ------------------------------------------------------------------------- */

.exploded {
  position: relative;
}

.exploded__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font: 500 11px/1 var(--f-mono);
  letter-spacing: .06em;
  color: var(--ink-2);
}

.exploded__control {
  display: flex;
  gap: 8px;
  align-items: center;
}

.exploded__range {
  width: 120px;
  accent-color: var(--action);
}

.exploded__stage {
  --explode: 0;
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 5% 8.888%;
}

.exploded__axis {
  position: absolute;
  left: 0;
  right: 0;
  top: 55%;
  border-top: 1px dashed var(--line-strong);
}

.exploded__layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  transform: translateX(calc((var(--i) - 4) * 6.4% * var(--explode)));
  transition: transform 600ms var(--ease-servo);
  transition-delay: calc(var(--i) * 60ms);
}

.exploded__part {
  position: absolute;
  left: var(--x);
  top: var(--y);
  width: var(--w);
  height: var(--h);
  border: 1.5px solid var(--ink);
  background: var(--canvas);
  cursor: pointer;
  pointer-events: auto;
  transition: background-color 90ms linear;
}

/* housings are drawn hatched */
.exploded__part--hatched {
  background-image: repeating-linear-gradient(45deg, var(--line) 0 1px, transparent 1px 6px);
}

.exploded__part--round {
  border-radius: 50%;
}

.exploded__part--hot {
  border-color: var(--action);
  background: rgba(15, 76, 154, .22);
}

.exploded__planet {
  position: absolute;
  width: 24%;
  height: 24%;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
}

.exploded__part--hot .exploded__planet {
  border-color: var(--action);
}

.exploded__planet--top {
  left: 38%;
  top: 10%;
}

.exploded__planet--left {
  left: 12%;
  top: 58%;
}

.exploded__planet--right {
  left: 64%;
  top: 58%;
}

/* leader line from balloon down to the part (balloons sit 18 % above the part) */
.exploded__lead {
  position: absolute;
  left: calc(var(--x) + var(--w) / 2);
  top: calc(var(--y) - 18% + 28px);
  width: 1px;
  height: calc(18% - 28px);
  background: var(--ink);
  opacity: 0;
  transition: opacity 180ms linear;
  transition-delay: calc(var(--i) * 60ms);
}

.exploded__balloon {
  position: absolute;
  left: calc(var(--x) + var(--w) / 2);
  top: calc(var(--y) - 18%);
  width: 28px;
  height: 28px;
  margin-left: -14px;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
  background: var(--canvas);
  color: var(--ink);
  font: 500 12px/1 var(--f-mono);
  cursor: pointer;
  pointer-events: auto;
  opacity: 0;
  transition: opacity 180ms linear, background 90ms linear;
  transition-delay: calc(var(--i) * 60ms);
}

.exploded__balloon--hot {
  background: var(--action);
  color: var(--action-ink);
}

.exploded__stage--labelled .exploded__lead,
.exploded__stage--labelled .exploded__balloon {
  opacity: 1;
}

.exploded__caption {
  position: absolute;
  left: 10px;
  bottom: 8px;
  font: 400 10px var(--f-mono);
  color: var(--muted);
}

/* ---- Section titles (display-2 with a gap below) ----------------------- */

.section-title {
  margin-bottom: 20px;
}

/* ---- ST 010 · Bill of materials ---------------------------------------- */

.bom {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr));
  gap: 40px;
  align-items: start;
}

.bom__title {
  margin-bottom: 16px;
}

.bom__intro {
  margin: 0 0 24px;
  color: var(--ink-2);
  max-width: 44ch;
}

.bom-selected {
  padding: 18px;
  border: 1.5px solid var(--ink);
  background: var(--canvas);
}

.bom-selected__label {
  margin-bottom: 8px;
  font: 500 11px var(--f-mono);
  color: var(--muted);
}

.bom-selected__name {
  font: 800 32px/1 var(--f-display);
  text-transform: uppercase;
}

.bom-selected__meta {
  margin-top: 6px;
  font: 400 13px/1.6 var(--f-mono);
  color: var(--ink-2);
}

.bom-table {
  border-top: 1.5px solid var(--ink);
}

.bom-table__row {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 88px 92px 40px;
  gap: 8px;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
  transition: background 90ms linear;
}

.bom-table__row--head {
  align-items: stretch;
  padding: 10px 0;
  border-bottom-color: var(--line-strong);
  font: 500 11px/1 var(--f-mono);
  letter-spacing: .06em;
  color: var(--muted);
}

.bom-table__row--hot {
  background: rgba(15, 76, 154, .10);
}

.bom-table__pos {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
  background: var(--canvas);
  color: var(--ink);
  font: 500 11px var(--f-mono);
}

.bom-table__row--hot .bom-table__pos {
  background: var(--action);
  color: var(--action-ink);
}

.bom-table__name {
  font-size: 15px;
}

.bom-table__art {
  font: 400 13px var(--f-mono);
}

/* stock: .signal-mark (circle = on the shelf, triangle = lead time) + text */
.bom-table__stock {
  --mark-size: 9px;
  display: flex;
  gap: 6px;
  align-items: center;
  font: 400 12px var(--f-mono);
}

.bom-table__add {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line-strong);
  background: var(--canvas);
  color: var(--ink);
  cursor: pointer;
}

.bom-table__add:hover {
  background: var(--ink);
  color: var(--canvas);
}

.bom-table__add:active {
  transform: scale(.94);
}

/* ---- ST 020 · Specifications ------------------------------------------- */

.specs__head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: end;
  gap: 20px;
  margin-bottom: 32px;
}

.frame-picker {
  display: flex;
  gap: 10px;
  align-items: end;
}

.frame-picker__btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 0;
  border: 0;
  background: none;
  color: var(--ink);
  cursor: pointer;
}

.frame-picker__size {
  width: var(--size);
  height: var(--size);
  border: 1.5px solid var(--ink);
  background: transparent;
  clip-path: var(--chamfer-s);
}

.frame-picker__btn[aria-pressed="true"] .frame-picker__size {
  background: var(--action);
}

.frame-picker__name {
  font: 500 11px var(--f-mono);
}

.spec-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line-strong);
}

.spec-table {
  width: 100%;
  min-width: 860px;
  table-layout: fixed;
  border-collapse: separate;
  border-spacing: 0;
  font: 400 15px/1.3 var(--f-mono);
}

.spec-table__param-col {
  width: 260px;
}

/* first column stays in place while the table scrolls sideways */
.spec-table__param {
  position: sticky;
  left: 0;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  font-family: var(--f-text);
  font-weight: 400;
  text-align: left;
  vertical-align: top;
}

.spec-table__param--head {
  padding: 12px 14px;
  border-bottom: 0;
  background: var(--ink);
  color: var(--canvas);
  font-family: var(--f-mono);
}

.spec-table__qualifier {
  font: 400 11px var(--f-mono);
  color: var(--muted);
}

.spec-table__frame {
  padding: 12px 14px;
  background: var(--ink);
  color: var(--canvas);
  font-weight: 400;
  text-align: right;
  vertical-align: top;
}

.spec-table__frame--current {
  background: var(--action);
  color: var(--action-ink);
}

.spec-table__value {
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  text-align: right;
  vertical-align: top;
}

.spec-table__value--current {
  background: rgba(15, 76, 154, .08);
  font-weight: 500;
}

.specs__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 40px;
  align-items: center;
  margin-top: 20px;
}

/* feature-control frame as on a drawing: leader + boxed cells */
.tolerance {
  display: flex;
  align-items: center;
}

.tolerance__leader {
  width: 10px;
  height: 1px;
  background: var(--ink);
}

.tolerance__frame {
  display: flex;
  border: 1.5px solid var(--ink);
  font: 500 14px/1 var(--f-mono);
}

.tolerance__cell {
  padding: 7px 9px;
  border-right: 1px solid var(--ink);
}

.tolerance__cell:last-child {
  border-right: 0;
}

.specs__note {
  font: 400 12px/1.5 var(--f-mono);
  color: var(--muted);
}

.specs__datasheet {
  margin-left: auto;
  font: 600 14px var(--f-text);
  text-transform: uppercase;
  letter-spacing: .04em;
}

/* ---- ST 030 · Torque curve ---------------------------------------------- */

.curves {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 440px), 1fr));
  gap: 48px;
}

.torque-chart {
  position: relative;
  height: 260px;
  margin-left: 44px;
  border-left: 1.5px solid var(--ink);
  border-bottom: 1.5px solid var(--ink);
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 25% 25%;
}

.torque-chart__plot {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.torque-chart__max {
  fill: none;
  stroke: var(--dv-2);
  stroke-width: 2;
  stroke-dasharray: 4 3;
}

.torque-chart__rated {
  fill: none;
  stroke: var(--dv-1);
  stroke-width: 2.5;
}

.torque-chart__y-max,
.torque-chart__zero,
.torque-chart__x-max {
  position: absolute;
  font: 400 11px var(--f-mono);
}

.torque-chart__y-max {
  left: -44px;
  top: -6px;
}

.torque-chart__zero {
  left: -18px;
  bottom: -6px;
}

.torque-chart__x-max {
  right: 0;
  bottom: -20px;
}

.torque-legend {
  display: flex;
  gap: 20px;
  margin: 30px 0 0 44px;
  font: 500 12px var(--f-mono);
}

.torque-legend__item {
  display: flex;
  gap: 6px;
  align-items: center;
}

.torque-legend__item::before {
  content: "";
  width: 20px;
}

.torque-legend__item--rated::before {
  height: 3px;
  background: var(--dv-1);
}

.torque-legend__item--max::before {
  border-top: 2px dashed var(--dv-2);
}

/* ---- ST 040 · Motor compatibility -------------------------------------- */

.compat__intro {
  margin: 0 0 20px;
  color: var(--ink-2);
  max-width: 44ch;
}

.compat__fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

/* .field / .field__input--select in the mono flavour */
.compat__field {
  font-size: 11px;
}

.compat__select {
  font: 500 15px var(--f-mono);
}

.compat__status {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-top: 16px;
  padding: 16px;
  border-left: 6px solid var(--sig-green);
  background: var(--canvas);
}

.compat__status--warn {
  border-left-color: var(--sig-yellow);
}

.compat__title {
  display: block;
  font: 600 16px var(--f-text);
}

.compat__meta {
  font: 400 13px var(--f-mono);
  color: var(--ink-2);
}

.compat__add {
  min-height: 40px;
  padding: 0 14px;
  border: 0;
  background: var(--panel);
  color: var(--ink);
  font: 600 13px var(--f-text);
  text-transform: uppercase;
  cursor: pointer;
}

.compat__add:active {
  transform: scale(.96);
}

/* ---- ST 050 · CAD & documents ------------------------------------------ */

.downloads {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr));
  gap: 40px;
  align-items: start;
}

.cad-card {
  border: 1.5px solid var(--ink);
  background: var(--canvas);
}

.cad-card__preview {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 16 / 9;
  background: var(--surface);
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 20px 20px;
}

.cad-card__body {
  position: relative;
  width: 36%;
  height: 50%;
  border: 1.5px solid var(--ink);
}

.cad-card__shaft {
  position: absolute;
  left: 100%;
  top: 30%;
  width: 40%;
  height: 40%;
  border: 1.5px solid var(--ink);
  border-left: 0;
}

.cad-card__flange {
  position: absolute;
  right: 100%;
  top: 15%;
  width: 18%;
  height: 70%;
  border: 1.5px solid var(--ink);
  border-right: 0;
}

.cad-card__axis {
  position: absolute;
  left: -30%;
  right: -50%;
  top: 50%;
  border-top: 1px dashed var(--ink);
}

.cad-card__label {
  position: absolute;
  left: 10px;
  top: 8px;
  font: 500 11px var(--f-mono);
  color: var(--ink-2);
}

.cad-card__hint {
  position: absolute;
  right: 10px;
  bottom: 8px;
  font: 400 11px var(--f-mono);
  color: var(--muted);
}

.cad-card__content {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 20px;
}

.cad-formats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1.5px solid var(--ink);
}

.cad-formats__btn {
  min-height: var(--target);
  border: 0;
  background: transparent;
  color: var(--ink);
  font: 500 13px var(--f-mono);
  cursor: pointer;
}

.cad-formats__btn[aria-checked="true"] {
  background: var(--ink);
  color: var(--canvas);
}

.cad-reg {
  display: grid;
  gap: 10px;
  padding: 16px;
  border: 1px solid var(--line-strong);
  background: var(--surface);
}

.cad-reg__title {
  font: 700 20px/1 var(--f-display);
  text-transform: uppercase;
}

.cad-reg__text {
  font-size: 14px;
  color: var(--ink-2);
}

.cad-reg__submit {
  min-height: var(--target);
  border: 0;
  background: var(--action);
  color: var(--action-ink);
  font: 600 14px var(--f-text);
  text-transform: uppercase;
  letter-spacing: .05em;
  cursor: pointer;
  clip-path: var(--chamfer-s);
}

.cad-reg__fineprint {
  font: 400 11px var(--f-mono);
  color: var(--muted);
}

.cad-card__download {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  border: 0;
  background: var(--action);
  color: var(--action-ink);
  font: 600 15px var(--f-text);
  text-transform: uppercase;
  letter-spacing: .05em;
  cursor: pointer;
  clip-path: var(--chamfer-s);
}

.cad-card__download:active {
  transform: scale(.98);
}

.doc-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1.5px solid var(--ink);
}

.doc-link {
  display: grid;
  grid-template-columns: 28px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 14px 4px;
  border-bottom: 1px solid var(--line-strong);
  color: var(--ink);
  text-decoration: none;
}

.doc-link:hover {
  background: var(--surface);
  color: var(--ink);
}

.doc-link__title {
  display: block;
  font-weight: 600;
}

.doc-link__meta {
  font: 400 12px var(--f-mono);
  color: var(--muted);
}

.footprint {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: center;
  margin-top: 24px;
  padding: 16px;
  border: 1px solid var(--line-strong);
}

.footprint__value {
  font: 700 20px/1 var(--f-display);
  text-transform: uppercase;
}

.footprint__meta {
  font: 400 12px/1.5 var(--f-mono);
  color: var(--muted);
}

/* ---- ST 060 · Next step ------------------------------------------------- */

/* .cta-band + .contact-card (components) */
.product-cta__book {
  font: 600 15px var(--f-text);
  text-transform: uppercase;
  letter-spacing: .05em;
}

/* ---- Sticky buy bar ----------------------------------------------------- */

.buy-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 120;
  border-top: 1px solid var(--line-strong);
  background: var(--canvas);
  color: var(--ink);
}

/* right padding keeps the bar clear of the kit pill */
.buy-bar__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  align-items: center;
  justify-content: space-between;
  max-width: 1360px;
  margin: 0 auto;
  padding: 10px clamp(24px, 18vw, 300px) 10px 24px;
}

.buy-bar__product {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

.buy-bar__code {
  font: 500 16px var(--f-mono);
}

.buy-bar__stock {
  display: flex;
  gap: 6px;
  align-items: center;
  font: 500 12px var(--f-mono);
  color: var(--ink-2);
}

.buy-bar__stock::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--sig-green);
}

.buy-bar__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.buy-bar__cad {
  display: inline-flex;
  align-items: center;
  min-height: var(--target);
  padding: 0 14px;
  border: 1.5px solid var(--ink);
  color: var(--ink);
  text-decoration: none;
  font: 600 14px var(--f-text);
  text-transform: uppercase;
}

.buy-bar__cad:hover {
  color: var(--ink);
}

.buy-bar__add {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: var(--target);
  padding: 0 18px;
  border: 0;
  background: var(--action);
  color: var(--action-ink);
  font: 600 14px var(--f-text);
  text-transform: uppercase;
  letter-spacing: .05em;
  cursor: pointer;
  clip-path: var(--chamfer-s);
}

.buy-bar__add:active {
  transform: scale(.96);
}