/* Apple-style presentation. Content and data stay in HTML and project.json. */
:root {
  color-scheme: light dark;
  font:
    100%/1.5 -apple-system,
    BlinkMacSystemFont,
    'SF Pro Text',
    'Helvetica Neue',
    Arial,
    sans-serif;
  --page: #ffffff;
  --surface: #f5f5f7;
  --surface-raised: #ffffff;
  --ink: #1d1d1f;
  --muted: #626269;
  --line: #dedee3;
  --accent: #0071e3;
  --link: #0066cc;
  --accent-soft: #eaf3ff;
  --glass: rgb(255 255 255 / 82%);
  --shadow: 0 12px 40px rgb(0 0 0 / 5%);
  --radius: 1.75rem;
  --focus: #0066cc;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 8rem;
}
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
button,
input {
  font: inherit;
}
button,
a,
input,
summary {
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}
button {
  cursor: pointer;
  color: inherit;
}
a {
  color: inherit;
  text-underline-offset: 0.2em;
}
button:focus-visible,
a:focus-visible,
input:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
}
button:disabled {
  cursor: default;
  opacity: 0.4;
}
h1,
h2,
h3,
p,
figure {
  margin: 0;
}
h1,
h2,
h3 {
  font-family:
    -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', Arial, sans-serif;
  font-optical-sizing: auto;
}
h1,
h2 {
  font-weight: 650;
  line-height: 1.05;
  letter-spacing: -0.045em;
}
h2 {
  font-size: clamp(2.25rem, 4vw, 3.6rem);
}
h3 {
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}
p + p {
  margin-top: 1rem;
}
.wrap {
  width: min(1280px, calc(100% - 6rem));
  margin-inline: auto;
}
.eyebrow {
  font-size: 0.6875rem;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: 0.1em;
  color: var(--muted);
}
.muted {
  color: var(--muted);
}
.small {
  font-size: 0.75rem;
  line-height: 1.6;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
[hidden] {
  display: none !important;
}
.skip {
  position: fixed;
  left: 1rem;
  top: -10rem;
  z-index: 50;
  background: var(--accent);
  color: white;
  padding: 0.75rem 1.25rem;
  border-radius: 0.75rem;
}
.skip:focus {
  top: 1rem;
}

/* Floating navigation is a single translucent functional layer. */
.header {
  position: sticky;
  top: 0.75rem;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 4.5rem;
  margin-top: 0.75rem;
  padding: 0.8rem 1.5rem;
  background: var(--glass);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid rgb(128 128 140 / 15%);
  border-radius: 1.4rem;
  box-shadow: 0 4px 24px rgb(0 0 0 / 4%);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  white-space: nowrap;
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 650;
  letter-spacing: -0.025em;
}
.brand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.9rem;
  line-height: 1;
  color: var(--accent);
  transform: rotate(-25deg);
}
.brand-sub {
  font-size: 0.5625rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  border-left: 1px solid var(--line);
  padding-left: 0.8rem;
  margin-left: 0.2rem;
}
.header nav {
  display: flex;
  align-items: center;
  gap: 1.8rem;
  font-size: 0.8125rem;
}
.header nav a {
  text-decoration: none;
  padding-block: 0.6rem;
  color: var(--muted);
}
.header nav a:hover {
  color: var(--ink);
}
.header-cta {
  display: inline-flex;
  gap: 1.2rem;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: #fff;
  border-radius: 999px;
  text-decoration: none;
  font-size: 0.75rem;
  font-weight: 500;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 1.75rem;
  min-height: 2.875rem;
  padding: 0.8rem 1.5rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  line-height: 1.3;
  transition:
    background-color 140ms ease,
    box-shadow 140ms ease,
    transform 140ms ease;
}
.primary {
  background: var(--accent);
  color: #fff;
}
.primary:hover,
.header-cta:hover {
  background: #0077ed;
}
.secondary {
  background: var(--surface);
  color: var(--ink);
  border-color: var(--line);
}
.secondary:hover {
  background: var(--line);
}
.text-link {
  color: var(--link);
  background: transparent;
  border: 0;
  padding: 0.35rem 0;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.5;
  text-decoration: none;
}
.text-link:hover {
  text-decoration: underline;
}
.button:active:not(:disabled),
.header-cta:active,
.viewer-toolbar button:active:not(:disabled),
.filter-group button:active,
.step-list button:active {
  transform: scale(0.97);
  transition-duration: 0ms;
}

/* The original CAD is the central product visual. */
.hero {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 4rem;
  align-items: center;
  padding-top: 5.25rem;
  padding-bottom: 4.75rem;
}
.hero-copy {
  padding-block: 0.5rem;
}
.status-dot {
  display: inline-block;
  width: 0.375rem;
  height: 0.375rem;
  margin-right: 0.4rem;
  border-radius: 50%;
  background: var(--accent);
  vertical-align: middle;
}
.hero h1 {
  font-size: clamp(4.5rem, 7.7vw, 7.5rem);
  line-height: 0.99;
  letter-spacing: -0.06em;
  margin: 1.5rem 0 1.75rem;
}
.hero h1 em {
  font-style: normal;
  color: var(--accent);
  font-weight: inherit;
}
.hero-description {
  font-size: 1.5rem;
  line-height: 1.3;
  letter-spacing: -0.025em;
  font-weight: 500;
}
.hero-detail {
  max-width: 23rem;
  margin: 1.15rem 0 1.8rem;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.6;
}
.hero-copy > .text-link {
  display: inline-block;
  margin-left: 1.1rem;
}
.hero-specs {
  display: flex;
  gap: 2.75rem;
  max-width: 25rem;
  margin-top: 2.5rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--line);
}
.hero-specs > div {
  display: flex;
  flex-direction: column;
}
.hero-specs b {
  font-size: 1.75rem;
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -0.04em;
}
.hero-specs span {
  margin-top: 0.35rem;
  font-size: 0.75rem;
  color: var(--muted);
}
.hero-explorer {
  position: relative;
  display: flex;
  flex-direction: column;
  align-self: stretch;
  min-height: 43rem;
  overflow: hidden;
  border-radius: 2.5rem;
  background: radial-gradient(ellipse at 50% 35%, var(--surface-raised) 0%, var(--surface) 78%);
  border: 1px solid rgb(128 128 140 / 8%);
}
.viewer-topline {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 1.6rem 0.5rem;
  font-size: 0.5625rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.viewer {
  position: relative;
  flex: 1;
  min-height: 31rem;
  overflow: hidden;
  touch-action: pan-y;
}
.viewer canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}
.viewer-fallback {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 2rem;
}
.viewer.loaded .viewer-fallback,
.viewer.loaded .model-loading {
  display: none;
}
.model-loading {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 2;
  transform: translate(-50%, -50%);
  max-width: 85%;
  border-radius: 0.875rem;
  background: var(--surface-raised);
  padding: 0.8rem 1rem;
  box-shadow: var(--shadow);
  font-size: 0.8125rem;
  text-align: center;
}
.viewer-label {
  position: absolute;
  z-index: 1;
  border-top: 1px solid #a9a9b2;
  padding-top: 0.4rem;
  font-size: 0.5rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--muted);
  pointer-events: none;
}
.label-hopper {
  top: 14%;
  right: 10%;
}
.label-wheel {
  top: 49%;
  left: 7%;
}
.label-base {
  bottom: 10%;
  right: 8%;
}
.viewer-toolbar {
  position: relative;
  z-index: 3;
  display: flex;
  gap: 0.2rem;
  width: max-content;
  max-width: calc(100% - 2rem);
  margin: 0.5rem auto 1.25rem;
  padding: 0.3rem;
  background: var(--glass);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border: 1px solid rgb(128 128 140 / 15%);
  border-radius: 999px;
  box-shadow: 0 4px 16px rgb(0 0 0 / 5%);
}
.viewer-toolbar button {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 2.5rem;
  padding: 0.55rem 0.85rem;
  border: 0;
  border-radius: 999px;
  background: transparent;
  font-size: 1rem;
  line-height: 1.2;
}
.viewer-toolbar button span {
  font-size: 0.6875rem;
  font-weight: 500;
}
.viewer-toolbar button:hover {
  background: var(--surface);
}
.viewer-toolbar button[aria-pressed='true'] {
  background: var(--ink);
  color: var(--page);
}
.viewer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  min-height: 3rem;
  border-top: 1px solid var(--line);
  padding: 0.9rem 1.5rem;
  color: var(--muted);
  font-size: 0.625rem;
}
.dimension {
  white-space: nowrap;
  letter-spacing: 0.05em;
}
.project-strip {
  background: var(--surface);
  border-block: 1px solid rgb(128 128 140 / 8%);
  color: var(--muted);
}
.project-strip .wrap {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.1rem;
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.12em;
}

/* Documentation keeps a readable hierarchy and generous section spacing. */
.intro-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem 5rem;
  padding-top: 6rem;
  padding-bottom: 6rem;
}
.intro-section h2 {
  margin-top: 1rem;
  font-size: clamp(2rem, 3.5vw, 3rem);
}
.intro-text {
  padding-top: 1.5rem;
  max-width: 34rem;
  font-size: 0.9375rem;
}
.intro-text .text-link {
  display: inline-block;
  margin-top: 1rem;
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-column: 1/-1;
  gap: 3rem;
  margin-top: 0.5rem;
  border-top: 1px solid var(--line);
}
.process-grid article {
  padding-top: 2rem;
}
.process-grid span {
  color: var(--muted);
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.1em;
}
.process-grid h3 {
  margin: 0.8rem 0 0.6rem;
  font-size: 1.5rem;
  letter-spacing: -0.035em;
}
.process-grid p {
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.6;
}
.section-pad {
  padding-top: 6rem;
  padding-bottom: 6rem;
}
.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 2rem;
}
.section-heading h2 {
  margin-top: 1rem;
}
.section-heading > .button {
  flex-shrink: 0;
}
.section-description {
  max-width: 48rem;
  margin: 1.5rem 0 2rem;
  color: var(--muted);
  font-size: 0.9375rem;
}
.notice {
  display: flex;
  gap: 0.8rem;
  align-items: flex-start;
  padding: 1.15rem 1.35rem;
  background: var(--accent-soft);
  border: 1px solid rgb(0 113 227 / 12%);
  border-radius: 1rem;
  color: var(--ink);
  font-size: 0.8125rem;
  line-height: 1.6;
}
.notice > span {
  color: var(--link);
  font-size: 1.15rem;
  line-height: 1.4;
}
.notice b {
  font-weight: 600;
}
details {
  margin-top: 1.75rem;
  padding: 1.2rem 0;
  border-top: 1px solid var(--line);
  font-size: 0.875rem;
}
summary {
  padding-block: 0.2rem;
  cursor: pointer;
  font-weight: 550;
}
summary::marker {
  color: var(--muted);
}
details p {
  margin-top: 0.8rem;
}
details ul,
details ol {
  padding-left: 1.3rem;
  color: var(--muted);
}
details li + li {
  margin-top: 0.5rem;
}

/* Shopping: grouped table, native checkboxes, explicit match confidence. */
.hardware-section {
  background: var(--surface);
}
.supplier-legend {
  margin: 1.25rem 0 1.5rem;
  padding-inline: 0.25rem;
}
.supplier-legend p {
  max-width: 68rem;
}
.supplier-legend p + p {
  margin-top: 0.5rem;
}
.parts-tools {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin: 1.75rem 0 1.25rem;
}
.filter-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.25rem;
  padding: 0.3rem;
  border-radius: 999px;
  background: #e8e8ed;
}
.filter-group button {
  min-height: 2.3rem;
  padding: 0.5rem 1rem;
  border: 0;
  border-radius: 999px;
  background: transparent;
  font-size: 0.75rem;
  font-weight: 500;
}
.filter-group button.selected {
  background: var(--surface-raised);
  color: var(--ink);
  box-shadow: 0 2px 8px rgb(0 0 0 / 9%);
}
input[type='search'] {
  width: 13rem;
  min-height: 2.75rem;
  padding: 0.6rem 0.95rem;
  color: var(--ink);
  background: var(--surface-raised);
  border: 1px solid var(--line);
  border-radius: 0.875rem;
  font-size: 0.8125rem;
}
input::placeholder {
  color: var(--muted);
  opacity: 1;
}
.shopping-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}
.shopping-status .text-link {
  font-size: 0.75rem;
}
.table-scroll {
  overflow-x: auto;
  overscroll-behavior-x: contain;
  border: 1px solid var(--line);
  border-radius: 1.5rem;
  background: var(--surface-raised);
  box-shadow: 0 6px 30px rgb(0 0 0 / 2%);
}
table {
  width: 100%;
  min-width: 1040px;
  border-collapse: separate;
  border-spacing: 0;
  text-align: left;
  font-size: 0.8125rem;
  line-height: 1.55;
}
th {
  padding: 1rem 0.9rem;
  border-bottom: 1px solid var(--line);
  background: var(--surface-raised);
  color: var(--muted);
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}
td {
  padding: 1.25rem 0.9rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
tr:last-child td {
  border-bottom: 0;
}
#parts-body .gathered-cell {
  width: 3rem;
  min-width: 3rem;
  padding: 1rem 0.3rem 1rem 0.7rem;
}
#parts-body td:nth-child(2) {
  width: 22%;
  min-width: 11rem;
  font-weight: 550;
}
#parts-body td:nth-child(3) {
  width: 33%;
  min-width: 16rem;
}
#parts-body td:nth-child(4) {
  width: 9%;
  min-width: 5.5rem;
}
#parts-body .supplier-cell {
  width: 33%;
  min-width: 17rem;
}
td small {
  display: block;
  margin-top: 0.45rem;
  color: var(--muted);
  font-size: 0.6875rem;
  font-weight: 400;
  line-height: 1.6;
}
.part-id {
  display: block;
  margin-bottom: 0.35rem;
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
  font-size: 0.625rem;
  font-weight: 400;
  color: var(--muted);
}
.shopping-checkbox {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  min-height: 2.75rem;
  cursor: pointer;
}
.shopping-checkbox input {
  width: 1.1rem;
  height: 1.1rem;
  margin: 0;
  accent-color: var(--accent);
  cursor: pointer;
}
tr.gathered {
  background: var(--accent-soft);
}
.supplier-status {
  display: inline-block;
  padding: 0.25rem 0.55rem;
  margin-bottom: 0.6rem;
  background: var(--surface);
  border-radius: 0.45rem;
  font-size: 0.625rem;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: 0.005em;
}
.status-matches-spec {
  background: #e9f6ed;
  color: #21703c;
}
.status-alternative {
  background: #fff2df;
  color: #86500b;
}
.status-partial {
  background: var(--accent-soft);
  color: var(--link);
}
.status-no-match {
  background: var(--surface);
  color: var(--muted);
}
.supplier-link {
  display: block;
  color: var(--link);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.6;
  text-decoration: none;
}
.supplier-link + .supplier-link {
  margin-top: 0.5rem;
}
.supplier-link:hover {
  text-decoration: underline;
}
.link-category {
  color: var(--muted);
  font-weight: 400;
}
.supplier-notes {
  margin-top: 0.75rem;
  padding: 0;
  border: 0;
  font-size: 0.6875rem;
  color: var(--muted);
}
.supplier-notes summary {
  color: var(--link);
  font-size: 0.6875rem;
  font-weight: 400;
}
.supplier-notes p {
  margin-top: 0.55rem;
}
#parts-count {
  margin-top: 1rem;
}

/* Printing: the original plate previews stay unaltered. */
.print-settings {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  overflow: hidden;
  margin: 2rem 0;
  border: 1px solid var(--line);
  border-radius: 1.4rem;
  background: var(--line);
}
.print-setting {
  padding: 1.3rem 1.4rem;
  background: var(--surface);
}
.print-setting span {
  display: block;
  color: var(--muted);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.025em;
  text-transform: uppercase;
}
.print-setting b {
  display: block;
  margin: 0.55rem 0 0.35rem;
  font-size: 1rem;
  font-weight: 550;
  letter-spacing: -0.02em;
}
.print-setting p {
  color: var(--muted);
  font-size: 0.6875rem;
  line-height: 1.6;
}
.plate-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.plate-card {
  overflow: hidden;
  background: var(--surface);
  border: 1px solid rgb(128 128 140 / 10%);
  border-radius: 1.25rem;
}
.plate-card img {
  display: block;
  width: 100%;
  height: 9rem;
  padding: 1rem;
  object-fit: contain;
  background: #f5f5f7;
}
.plate-card > div {
  padding: 1.1rem 1.15rem 1.4rem;
}
.plate-card span {
  color: var(--muted);
  font-size: 0.5625rem;
  font-weight: 550;
  letter-spacing: 0.06em;
}
.plate-card h3 {
  margin-top: 0.5rem;
  font-size: 0.9375rem;
  line-height: 1.3;
}
.plate-card p {
  margin-top: 0.65rem;
  color: var(--muted);
  font-size: 0.6875rem;
  line-height: 1.6;
}
.print-note {
  display: flex;
  align-items: center;
  gap: 1.7rem;
  margin-top: 2rem;
  padding: 2rem;
  border-radius: 1.5rem;
  background: var(--surface);
}
.note-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 3rem;
  height: 3rem;
  border: 2px solid var(--link);
  border-radius: 50%;
  color: var(--link);
  font-size: 1.5rem;
  font-weight: 600;
}
.print-note h3 {
  font-size: 1.2rem;
}
.print-note p {
  margin: 0.7rem 0 0.4rem;
  color: var(--muted);
  font-size: 0.875rem;
}

/* Assembly: the sidebar, instructions, and visual remain in the same order. */
.assembly-section {
  background: var(--surface);
}
.guide-progress {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 2rem 0;
  color: var(--muted);
  font-size: 0.75rem;
}
.progress-track {
  width: 100%;
  height: 0.3rem;
  overflow: hidden;
  margin-top: 0.6rem;
  border-radius: 999px;
  background: #dcdce1;
}
.progress-track > div {
  height: 100%;
  width: 0;
  background: var(--accent);
  border-radius: inherit;
  transition: width 240ms ease-out;
}
.wizard-layout {
  display: grid;
  grid-template-columns: 10.5rem 1fr 1.05fr;
  align-items: start;
  gap: 1.75rem;
}
.wizard-layout > aside {
  min-width: 0;
  position: sticky;
  top: 7rem;
  background: var(--surface-raised);
  padding: 0.5rem;
  border: 1px solid rgb(128 128 140 / 10%);
  border-radius: 1.25rem;
}
.step-list {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.step-list button {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  width: 100%;
  min-height: 2.75rem;
  padding: 0.65rem 0.7rem;
  border: 0;
  border-radius: 0.8rem;
  background: transparent;
  font-size: 0.75rem;
  line-height: 1.3;
  text-align: left;
}
.step-list button span {
  color: var(--muted);
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
  font-size: 0.625rem;
}
.step-list button:hover {
  background: var(--surface);
}
.step-list button.active {
  background: var(--accent);
  color: #fff;
}
.step-list button.active span {
  color: #fff;
}
.step-list button.done:not(.active) {
  background: var(--accent-soft);
}
.step-list button.done:not(.active) span {
  color: var(--link);
}
.step-main {
  min-width: 0;
  padding: 1.75rem;
  background: var(--surface-raised);
  border: 1px solid rgb(128 128 140 / 10%);
  border-radius: 1.5rem;
}
.step-heading h3 {
  margin: 0.85rem 0 1rem;
  font-size: 1.85rem;
  line-height: 1.12;
  letter-spacing: -0.035em;
}
.step-heading > p {
  color: var(--muted);
  font-size: 0.875rem;
}
.action-list {
  margin: 1.6rem 0;
  padding-left: 1.2rem;
  font-size: 0.8125rem;
  line-height: 1.65;
}
.action-list li {
  padding-left: 0.3rem;
  margin-bottom: 0.85rem;
}
.action-list li::marker {
  color: var(--link);
  font-size: 0.75rem;
  font-weight: 500;
}
.step-note {
  margin: 1.5rem 0;
  border-left: 2px solid var(--accent);
  padding: 0.1rem 0 0.1rem 1rem;
  color: var(--muted);
  font-size: 0.75rem;
}
.step-note b {
  color: var(--ink);
  font-weight: 550;
}
.step-note p {
  margin-top: 0.4rem;
}
.completion-check {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 1rem;
  font-size: 0.75rem;
  line-height: 1.6;
  cursor: pointer;
}
.completion-check input {
  flex-shrink: 0;
  width: 1.1rem;
  height: 1.1rem;
  margin-top: 0.15rem;
  accent-color: var(--accent);
}
.completion-check:has(input:checked) {
  background: var(--accent-soft);
  border-color: rgb(0 113 227 / 30%);
}
.step-pagination {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  margin: 1.5rem 0 1rem;
}
.step-pagination .button {
  min-height: 2.75rem;
  gap: 0.5rem;
  padding: 0.7rem 1rem;
  font-size: 0.75rem;
}
.step-visual {
  min-width: 0;
}
.assembly-viewer-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.2rem 0.5rem;
  background: var(--surface-raised);
  border: 1px solid rgb(128 128 140 / 10%);
  border-bottom: 0;
  border-radius: 1.5rem 1.5rem 0 0;
}
.assembly-viewer-heading .eyebrow {
  font-size: 0.5625rem;
}
.assembly-viewer-heading .text-link {
  font-size: 0.75rem;
}
.assembly-viewer {
  min-height: 21rem;
  height: 21rem;
  background: var(--surface-raised);
  border: 1px solid rgb(128 128 140 / 10%);
  border-top: 0;
  border-radius: 0 0 1.5rem 1.5rem;
}
.animation-caption {
  margin-top: 0.6rem;
  padding-inline: 0.3rem;
  font-size: 0.625rem;
}
.reference-photo {
  margin-top: 1.25rem;
}
.reference-photo img {
  display: block;
  width: 100%;
  height: 14rem;
  object-fit: cover;
  border-radius: 1.25rem;
}
figcaption {
  margin-top: 0.75rem;
  color: var(--muted);
  font-size: 0.6875rem;
  line-height: 1.6;
}
.reference-photo figcaption {
  padding-inline: 0.25rem;
}
#guide-finish {
  color: var(--link);
}

/* Explanatory graphics and retained source video. */
.mechanism-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-column: 1/-1;
  align-items: center;
  gap: 3rem;
  margin-top: 1rem;
  padding: 2.75rem;
  border-radius: 2rem;
  background: var(--surface);
}
.mechanism-panel h3 {
  margin: 0.85rem 0 1rem;
  font-size: 1.85rem;
  letter-spacing: -0.035em;
}
.mechanism-panel p {
  color: var(--muted);
  font-size: 0.875rem;
}
.mechanism-panel .text-link {
  margin-top: 1rem;
}
.mechanism-diagram svg {
  display: block;
  width: 100%;
  max-height: 19rem;
}
.mechanism-diagram svg text {
  fill: var(--muted);
}
.mechanism-diagram svg > path,
.mechanism-diagram marker path {
  stroke: var(--muted);
}
.mechanism-diagram figcaption {
  text-align: center;
  font-size: 0.625rem;
}
.schematic-wheel {
  transform-box: fill-box;
  transform-origin: center;
  animation: wheel-turn 4s linear infinite;
  animation-play-state: paused;
}
.wheel-top {
  animation-direction: reverse;
}
.schematic-ball {
  animation: ball-through 4s ease-in infinite;
  animation-play-state: paused;
}
.mechanism-diagram.playing .schematic-wheel,
.mechanism-diagram.playing .schematic-ball {
  animation-play-state: running;
}
@keyframes wheel-turn {
  to {
    transform: rotate(360deg);
  }
}
@keyframes ball-through {
  0%,
  15% {
    transform: translateX(0);
    opacity: 1;
  }
  80%,
  93% {
    transform: translateX(355px);
    opacity: 1;
  }
  94%,
  100% {
    transform: translateX(355px);
    opacity: 0;
  }
}
.wiring-section {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  align-items: center;
  gap: 5rem;
}
.wiring-section h2 {
  margin-top: 1rem;
}
.wiring-section > div > p {
  margin: 1.5rem 0;
  color: var(--muted);
  font-size: 0.9375rem;
}
.wiring-section .notice {
  margin: 1.5rem 0;
}
.wiring-figure {
  padding: 2rem;
  background: var(--surface);
  border-radius: 2rem;
}
.wiring-figure svg {
  display: block;
  width: 100%;
  height: auto;
}
.wiring-figure svg text {
  fill: var(--ink);
}
.wiring-figure svg rect,
.wiring-figure svg circle {
  fill: var(--surface-raised);
  stroke: var(--line);
}
.wiring-figure figcaption {
  text-align: center;
}
.prototype-section {
  background: #111113;
  color: #f5f5f7;
}
.prototype-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 5rem;
  align-items: center;
}
.prototype-grid .eyebrow {
  color: #a8a8ae;
}
.prototype-grid h2 {
  margin: 1rem 0 1.5rem;
}
.prototype-grid p {
  max-width: 29rem;
  color: #b6b6be;
  font-size: 0.9375rem;
}
.prototype-grid .text-link {
  display: inline-block;
  margin: 1.25rem 0;
  color: #2997ff;
}
.prototype-grid .small {
  color: #a8a8b0;
  font-size: 0.75rem;
}
.prototype-grid video {
  display: block;
  width: 100%;
  height: 24rem;
  object-fit: contain;
  background: #000;
  border-radius: 1.5rem;
}
.prototype-grid figcaption {
  color: #a8a8b0;
}

/* Files have a consistent, obvious tap target. */
.download-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 2.5rem 0 1.5rem;
}
.download-grid > a {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  min-height: 7rem;
  padding: 1.6rem;
  background: var(--surface);
  border: 1px solid transparent;
  border-radius: 1.5rem;
  text-decoration: none;
  transition:
    background-color 150ms ease,
    border-color 150ms ease;
}
.download-grid > a:hover {
  border-color: var(--accent);
}
.download-grid > a:active {
  background: var(--accent-soft);
}
.file-tag {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  flex-shrink: 0;
  min-width: 3.25rem;
  height: 3.5rem;
  background: var(--surface-raised);
  border: 1px solid var(--line);
  border-radius: 0.8rem;
  color: var(--link);
  font-size: 0.625rem;
  font-weight: 550;
  letter-spacing: 0.02em;
}
.download-grid h3 {
  font-size: 1.1rem;
}
.download-grid p {
  margin-top: 0.4rem;
  color: var(--muted);
  font-size: 0.8125rem;
}
.download-grid > a > span:last-child {
  margin-left: auto;
  color: var(--link);
  font-size: 1.5rem;
}
footer {
  padding: 2.25rem 0;
  border-top: 1px solid var(--line);
  background: var(--surface);
}
footer > .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}
footer p,
footer > .wrap > a:last-child {
  color: var(--muted);
  font-size: 0.75rem;
}

/* Tablet and touch layouts retain the same information and controls. */
@media (max-width: 1150px) {
  .wrap {
    width: calc(100% - 4rem);
  }
  .header {
    padding-inline: 1.15rem;
  }
  .brand-sub {
    display: none;
  }
  .header nav {
    gap: 1.25rem;
  }
  .hero {
    gap: 2.5rem;
  }
  .hero h1 {
    font-size: clamp(4.5rem, 8.4vw, 6.5rem);
  }
  .hero-explorer {
    min-height: 41rem;
  }
  .viewer-topline > span:last-child {
    display: none;
  }
  .hero-copy > .text-link {
    margin-left: 0.6rem;
    font-size: 0.8125rem;
  }
  .hero-specs {
    gap: 2rem;
  }
  .wizard-layout {
    grid-template-columns: 9rem 1fr 1fr;
    gap: 1.1rem;
  }
  .step-main {
    padding: 1.3rem;
  }
  .step-list button {
    padding-inline: 0.5rem;
    font-size: 0.6875rem;
  }
  .step-heading h3 {
    font-size: 1.65rem;
  }
  .step-pagination .button {
    padding-inline: 0.75rem;
  }
  .plate-grid {
    gap: 0.75rem;
  }
  .plate-card > div {
    padding: 1rem 0.8rem;
  }
  .wiring-section,
  .prototype-grid {
    gap: 3rem;
  }
}
@media (max-width: 850px) {
  html {
    scroll-padding-top: 9.5rem;
  }
  .wrap {
    width: calc(100% - 3rem);
  }
  .header {
    flex-wrap: wrap;
    min-height: auto;
    gap: 0.3rem 1rem;
    padding: 0.7rem 1.1rem 0.5rem;
    border-radius: 1.2rem;
  }
  .header nav {
    order: 3;
    justify-content: space-between;
    gap: 0.8rem;
    width: 100%;
    font-size: 0.75rem;
  }
  .header nav a {
    padding-block: 0.55rem;
  }
  .header-cta {
    min-height: 2rem;
    font-size: 0.6875rem;
  }
  .hero {
    grid-template-columns: 1fr;
    gap: 2.75rem;
    padding-top: 3.5rem;
    padding-bottom: 3.5rem;
  }
  .hero h1 {
    font-size: 6.5rem;
  }
  .hero-copy {
    max-width: 36rem;
  }
  .hero-detail {
    max-width: 32rem;
  }
  .hero-specs {
    max-width: 30rem;
    gap: 4rem;
  }
  .hero-explorer {
    min-height: 37rem;
  }
  .viewer {
    min-height: 27rem;
  }
  .viewer-topline {
    padding-inline: 1.4rem;
  }
  .viewer-topline > span:last-child {
    display: inline;
  }
  .intro-section {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-block: 4rem;
  }
  .intro-text {
    padding-top: 0;
    max-width: 100%;
  }
  .process-grid {
    gap: 1.5rem;
  }
  .process-grid h3 {
    font-size: 1.3rem;
  }
  .mechanism-panel {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    padding: 2rem;
  }
  .mechanism-panel h3 {
    font-size: 1.5rem;
  }
  .section-pad {
    padding-block: 4rem;
  }
  .section-heading {
    gap: 1.5rem;
    align-items: flex-start;
  }
  .section-heading > .button {
    font-size: 0.75rem;
    gap: 0.65rem;
    padding: 0.8rem 1rem;
  }
  .parts-tools {
    flex-direction: column;
    align-items: stretch;
  }
  .filter-group {
    width: max-content;
    max-width: 100%;
  }
  .filter-group button {
    padding-inline: 0.8rem;
    font-size: 0.6875rem;
  }
  .search-label,
  input[type='search'] {
    width: 100%;
  }
  .print-settings {
    grid-template-columns: repeat(2, 1fr);
  }
  .plate-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .wizard-layout {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
  .wizard-layout > aside {
    position: static;
    grid-column: 1/-1;
    padding: 0.4rem;
  }
  .step-list {
    flex-direction: row;
    gap: 0.25rem;
    overflow-x: auto;
  }
  .step-list button {
    flex-shrink: 0;
    width: auto;
    gap: 0.6rem;
    padding-inline: 0.85rem;
    font-size: 0.75rem;
    white-space: nowrap;
  }
  .assembly-viewer {
    min-height: 19rem;
    height: 19rem;
  }
  .reference-photo img {
    height: 13rem;
  }
  .wiring-section {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .wiring-section h2 br {
    display: none;
  }
  .wiring-figure {
    max-width: 42rem;
    width: 100%;
    margin-inline: auto;
  }
  .prototype-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .prototype-grid p {
    max-width: 100%;
  }
  .prototype-grid video {
    height: 25rem;
  }
  .download-grid {
    gap: 1rem;
  }
  .download-grid > a {
    gap: 1rem;
    padding: 1.25rem;
  }
  .download-grid h3 {
    font-size: 1rem;
  }
  .download-grid p {
    font-size: 0.75rem;
  }
  .downloads-section .section-heading {
    display: block;
  }
  .downloads-section .section-heading > .small {
    display: block;
    margin-top: 1rem;
  }
  footer > .wrap {
    flex-wrap: wrap;
  }
  footer p {
    order: 3;
    width: 100%;
  }
}
@media (max-width: 540px) {
  .wrap {
    width: calc(100% - 2.25rem);
  }
  .header {
    top: 0.5rem;
    margin-top: 0.5rem;
    padding-inline: 0.9rem;
  }
  .brand {
    gap: 0.4rem;
    font-size: 0.75rem;
  }
  .brand-icon {
    font-size: 1.6rem;
  }
  .header-cta {
    padding-inline: 0.8rem;
    gap: 0.6rem;
  }
  .header nav {
    font-size: 0.6875rem;
  }
  .hero {
    gap: 2.5rem;
    padding-top: 3rem;
  }
  .hero h1 {
    margin-top: 1.1rem;
    font-size: clamp(4.6rem, 20vw, 6.3rem);
  }
  .hero-description {
    font-size: 1.35rem;
  }
  .hero-detail {
    font-size: 0.875rem;
  }
  .hero-copy > .text-link {
    margin-left: 0.8rem;
  }
  .hero-specs {
    justify-content: space-between;
    gap: 1rem;
    margin-top: 2rem;
  }
  .hero-specs b {
    font-size: 1.6rem;
  }
  .hero-specs span {
    font-size: 0.6875rem;
  }
  .hero-explorer {
    min-height: 31rem;
    border-radius: 1.75rem;
  }
  .viewer {
    min-height: 22rem;
  }
  .viewer-topline {
    padding: 1.1rem 1.1rem 0.4rem;
    font-size: 0.5rem;
  }
  .viewer-topline > span:last-child {
    display: none;
  }
  .viewer-label {
    font-size: 0.4375rem;
  }
  .viewer-bottom {
    padding-inline: 1.1rem;
    font-size: 0.5625rem;
  }
  .dimension {
    display: none;
  }
  .viewer-toolbar {
    margin-bottom: 1rem;
  }
  .viewer-toolbar button {
    gap: 0.35rem;
    padding-inline: 0.6rem;
  }
  .viewer-toolbar button span {
    font-size: 0.625rem;
  }
  .project-strip .wrap {
    padding-block: 1rem;
    font-size: 0.5rem;
    letter-spacing: 0.08em;
  }
  .project-strip .wrap > span:last-child {
    display: none;
  }
  .intro-section,
  .section-pad {
    padding-block: 3.5rem;
  }
  .intro-section h2 {
    font-size: 2.15rem;
  }
  h2 {
    font-size: 2.2rem;
  }
  .process-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .process-grid article {
    padding: 1.5rem 0;
  }
  .process-grid article + article {
    border-top: 1px solid var(--line);
  }
  .process-grid h3 {
    font-size: 1.5rem;
  }
  .mechanism-panel {
    grid-template-columns: 1fr;
    padding: 1.5rem;
    gap: 1.5rem;
    border-radius: 1.5rem;
  }
  .mechanism-panel h3 {
    font-size: 1.65rem;
  }
  .mechanism-diagram svg {
    max-height: 16rem;
  }
  .section-heading {
    flex-direction: column;
    gap: 1.25rem;
  }
  .section-heading > .button {
    font-size: 0.8125rem;
    padding-inline: 1.1rem;
  }
  .section-description {
    font-size: 0.875rem;
  }
  .notice {
    padding: 1rem;
  }
  .filter-group {
    width: 100%;
    border-radius: 1.2rem;
    gap: 0.15rem;
  }
  .filter-group button {
    flex-grow: 1;
    padding-inline: 0.65rem;
    min-height: 2.5rem;
    font-size: 0.625rem;
  }
  .shopping-status {
    align-items: flex-start;
  }
  .shopping-status .small,
  .shopping-status .text-link {
    font-size: 0.6875rem;
  }
  .table-scroll {
    border-radius: 1.1rem;
  }
  .print-setting {
    padding: 1rem;
  }
  .print-setting b {
    font-size: 0.875rem;
  }
  .plate-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }
  .plate-card img {
    height: 8.25rem;
    padding: 0.8rem;
  }
  .plate-card h3 {
    font-size: 0.875rem;
  }
  .print-note {
    align-items: flex-start;
    gap: 1rem;
    padding: 1.4rem;
  }
  .note-number {
    width: 2.25rem;
    height: 2.25rem;
    font-size: 1.2rem;
  }
  .print-note h3 {
    font-size: 1.1rem;
  }
  .print-note p {
    font-size: 0.8125rem;
  }
  .wizard-layout {
    grid-template-columns: 1fr;
  }
  .step-visual {
    grid-row: 2;
  }
  .step-main {
    grid-row: 3;
    padding: 1.5rem;
  }
  .step-heading h3 {
    font-size: 1.9rem;
  }
  .action-list {
    font-size: 0.875rem;
  }
  .step-note,
  .completion-check {
    font-size: 0.8125rem;
  }
  .step-pagination .button {
    font-size: 0.8125rem;
  }
  .assembly-viewer {
    min-height: 20rem;
    height: 20rem;
  }
  .reference-photo {
    margin-top: 1rem;
  }
  .reference-photo img {
    height: 13rem;
  }
  .guide-progress {
    font-size: 0.6875rem;
  }
  .wiring-figure {
    padding: 1rem;
    border-radius: 1.5rem;
  }
  .prototype-grid video {
    height: 19rem;
  }
  .download-grid {
    grid-template-columns: 1fr;
  }
  .download-grid > a {
    padding: 1.4rem;
    min-height: 6.5rem;
    border-radius: 1.25rem;
  }
  .download-grid h3 {
    font-size: 1rem;
  }
  .download-grid p {
    font-size: 0.75rem;
  }
  footer {
    padding-block: 1.75rem;
  }
  footer > .wrap {
    gap: 1rem;
  }
  footer p,
  footer > .wrap > a:last-child {
    font-size: 0.6875rem;
  }
}

/* Adapt to platform appearance and independent accessibility preferences. */
@media (prefers-color-scheme: dark) {
  :root {
    --page: #000;
    --surface: #161617;
    --surface-raised: #222224;
    --ink: #f5f5f7;
    --muted: #a8a8b0;
    --line: #39393d;
    --link: #66b2ff;
    --accent-soft: #102a46;
    --glass: rgb(30 30 33 / 86%);
    --shadow: 0 12px 40px rgb(0 0 0 / 25%);
    --focus: #66b2ff;
  }
  .filter-group {
    background: #2d2d31;
  }
  .progress-track {
    background: #39393d;
  }
  .status-matches-spec {
    color: #a1deb2;
    background: #153322;
  }
  .status-alternative {
    color: #f3ce91;
    background: #382914;
  }
}
@media (prefers-reduced-transparency: reduce) {
  .header,
  .viewer-toolbar {
    background: var(--surface-raised);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}
@media (prefers-contrast: more) {
  :root {
    --muted: var(--ink);
    --line: #81818a;
  }
  .header,
  .viewer-toolbar {
    background: var(--surface-raised);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-color: var(--ink);
  }
  .supplier-status {
    border: 1px solid currentColor;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation: none !important;
    transition-duration: 0ms !important;
  }
  .button:active,
  .header-cta:active,
  .viewer-toolbar button:active,
  .filter-group button:active,
  .step-list button:active {
    transform: none;
  }
  .schematic-ball {
    transform: translateX(162px);
  }
}
@media print {
  :root {
    color-scheme: light;
    --page: #fff;
    --surface: #fff;
    --surface-raised: #fff;
    --ink: #000;
    --muted: #333;
    --line: #ccc;
    --link: #000;
  }
  body {
    font-size: 11px;
    background: white;
    color: black;
  }
  .wrap {
    width: 100%;
  }
  .header,
  .hero-explorer,
  .step-list,
  .step-pagination,
  .step-visual,
  .parts-tools,
  .shopping-status,
  .download-grid,
  video,
  footer {
    display: none !important;
  }
  .hero,
  .wizard-layout {
    display: block;
  }
  .hero,
  .intro-section,
  .section-pad {
    padding-block: 1rem;
  }
  .hero h1 {
    font-size: 3rem;
  }
  h2 {
    font-size: 1.6rem;
  }
  .table-scroll {
    overflow: visible;
    border: 0;
    border-radius: 0;
    box-shadow: none;
  }
  table {
    min-width: 0;
    font-size: 9px;
  }
  #parts-body td {
    min-width: 0 !important;
    padding: 0.6rem 0.3rem;
  }
  .supplier-notes {
    display: block;
  }
  .plate-grid {
    grid-template-columns: repeat(5, 1fr);
  }
  .prototype-section {
    color: black;
    background: white;
  }
  .prototype-grid p,
  .prototype-grid .small {
    color: #333;
  }
  .assembly-section::after {
    content: 'For all 13 assembly steps, print the complete assembly guide in the English documentation download.';
    display: block;
    margin-top: 1rem;
  }
}

/* Component photography and independent SVGs share one compact, stable layout. */
.component-view-tools {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: -0.25rem 0 1.25rem;
}
.component-view-tools > p {
  max-width: 44rem;
  font-size: 0.6875rem;
}
.component-mode-control {
  display: inline-flex;
  flex-shrink: 0;
  gap: 0.15rem;
  padding: 0.25rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
}
.component-mode-control button {
  min-height: 2.25rem;
  padding: 0.45rem 0.9rem;
  border: 0;
  border-radius: 999px;
  background: transparent;
  font-size: 0.6875rem;
  font-weight: 500;
}
.component-mode-control button.selected {
  background: var(--surface-raised);
  box-shadow: 0 2px 7px rgb(0 0 0 / 8%);
}
.component-mode-control button:active,
.component-thumb:active {
  transform: scale(0.97);
}
.part-identification {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
}
.part-copy {
  min-width: 0;
  padding-top: 0.15rem;
}
#parts-body td:nth-child(2) {
  min-width: 17rem;
}
.component-thumb {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.2rem;
  flex-shrink: 0;
  width: 5.4rem;
  min-height: 5.8rem;
  padding: 0.3rem;
  border: 1px solid #e0e1e6;
  border-radius: 0.9rem;
  background: #fff;
  color: #626269;
}
.component-thumb:hover {
  border-color: var(--accent);
}
.component-thumb img {
  display: block;
  width: 5rem;
  height: 4rem;
  object-fit: contain;
  border-radius: 0.5rem;
  background: #fff;
}
.component-thumb span {
  font-size: 0.5rem;
  line-height: 1.4;
  font-weight: 500;
}
.component-dialog {
  width: min(760px, calc(100vw - 2.5rem));
  max-height: 90dvh;
  overflow-y: auto;
  padding: 2rem;
  border: 1px solid var(--line);
  border-radius: 1.75rem;
  background: var(--surface-raised);
  color: var(--ink);
  box-shadow: 0 25px 100px rgb(0 0 0 / 25%);
}
.component-dialog[open] {
  animation: component-materialize 160ms ease-out;
}
.component-dialog::backdrop {
  background: rgb(0 0 0 / 40%);
  backdrop-filter: blur(3px);
}
.component-dialog-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}
.component-dialog-heading h2 {
  font-size: 1.75rem;
  line-height: 1.15;
  margin-top: 0.5rem;
  letter-spacing: -0.035em;
}
.component-dialog-close {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  border: 0;
  border-radius: 50%;
  background: var(--surface);
  color: var(--muted);
  font-size: 1.6rem;
  line-height: 1;
}
.component-dialog-close:hover {
  background: var(--line);
}
.component-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.component-comparison figure {
  min-width: 0;
}
.component-comparison img {
  display: block;
  width: 100%;
  height: 15rem;
  object-fit: contain;
  padding: 0.5rem;
  background: #fff;
  border: 1px solid #e0e1e6;
  border-radius: 1rem;
}
.component-comparison figcaption {
  padding-inline: 0.3rem;
  font-size: 0.6875rem;
}
.component-dialog-note {
  margin-bottom: 0.9rem;
  font-size: 0.875rem;
}
.component-dialog-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin: 1rem 0 0.75rem;
}
.component-dialog-links .text-link {
  font-size: 0.8125rem;
}
@keyframes component-materialize {
  from {
    opacity: 0;
    transform: scale(0.985);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}
@media (max-width: 540px) {
  .component-view-tools {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.7rem;
  }
  .component-mode-control button {
    min-height: 2.5rem;
  }
  .component-dialog {
    padding: 1.25rem;
    border-radius: 1.3rem;
  }
  .component-dialog-heading h2 {
    font-size: 1.4rem;
  }
  .component-comparison {
    gap: 0.7rem;
  }
  .component-comparison img {
    height: 9rem;
    padding: 0.3rem;
  }
  .component-comparison figcaption {
    font-size: 0.5625rem;
  }
}
@media (prefers-reduced-transparency: reduce) {
  .component-dialog::backdrop {
    backdrop-filter: none;
    background: rgb(0 0 0 / 55%);
  }
}
@media (prefers-contrast: more) {
  .component-thumb,
  .component-dialog {
    border: 1px solid currentColor;
  }
}
@media (prefers-reduced-motion: reduce) {
  .component-mode-control button:active,
  .component-thumb:active {
    transform: none;
  }
  .component-dialog[open] {
    animation: none;
  }
}
@media print {
  .component-view-tools,
  .component-dialog {
    display: none !important;
  }
  .component-thumb {
    border: 0;
  }
  .component-thumb img {
    width: 3rem;
    height: 2.5rem;
  }
  .component-thumb {
    width: 3.3rem;
    min-height: 3rem;
  }
}

/* Launcher selection and the independent Mobile01 hardware study. */
.launcher-picker {
  padding-block: 3.5rem 1.5rem;
}
.launcher-picker h2 {
  margin-block: 0.5rem 0.8rem;
  font-size: clamp(2rem, 3.5vw, 3rem);
}
.launcher-tabs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 1.75rem;
}
.launcher-tabs button {
  display: flex;
  text-align: left;
  align-items: center;
  gap: 1rem;
  padding: 1.3rem 1.5rem;
  background: var(--surface);
  border: 2px solid transparent;
  border-radius: 1.1rem;
  min-width: 0;
}
.launcher-tabs button[aria-selected='true'] {
  background: var(--accent-soft);
  border-color: var(--accent);
}
.launcher-tabs strong,
.launcher-tabs small {
  display: block;
}
.launcher-tabs small {
  color: var(--muted);
  margin-top: 0.3rem;
  font-size: 0.75rem;
}
.tab-number {
  font-size: 0.75rem;
  color: var(--link);
}
.tab-arrow {
  margin-left: auto;
  color: var(--link);
}
.mobile-hero {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  align-items: center;
  gap: 3rem;
  padding-block: 4.5rem 5rem;
}
.mobile-hero h1 {
  font-size: clamp(3rem, 5vw, 5rem);
  margin: 1rem 0 1.5rem;
}
.mobile-hero h1 em {
  color: var(--accent);
  font-style: normal;
}
.mobile-hero-art {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.mobile-hero-art img,
.mobile-diagram img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 1rem;
}
.mobile-hero-art figcaption,
.mobile-diagram figcaption {
  color: var(--muted);
  font-size: 0.75rem;
  padding: 1rem 0.5rem 0;
}
.mobile-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  margin-block: 1.5rem;
}
.mobile-section {
  padding-block: 5rem;
}
.mobile-section .section-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 3rem;
  margin-bottom: 2.5rem;
}
.mobile-section .section-heading > p {
  max-width: 28rem;
}
.mobile-section h2 {
  margin-top: 0.8rem;
}
.mobile-tinted {
  background: var(--surface);
}
.mobile-facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-top: 3rem;
}
.mobile-facts h3 {
  font-size: 1.3rem;
  margin-bottom: 0.85rem;
}
.mobile-facts p,
.mobile-facts ol {
  color: var(--muted);
}
.mobile-diagram {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem;
  background: var(--surface-raised);
}
.mobile-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  margin-block: 1.5rem;
}
.mobile-table th,
.mobile-table td {
  padding: 1.1rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}
.mobile-table th {
  font-size: 0.75rem;
  color: var(--muted);
}
.mobile-table td:first-child {
  min-width: 12rem;
  width: 28%;
}
.mobile-table small {
  display: block;
  color: var(--muted);
  margin-top: 0.4rem;
  font-size: 0.75rem;
}
.mobile-table td:last-child {
  min-width: 3rem;
}
.mobile-pcb-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 3rem;
  align-items: center;
}
.mobile-pcb-grid h3 {
  margin: 1rem 0;
  font-size: 1.6rem;
}
.pcb-status {
  color: var(--link);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  font-weight: 600;
}
.mobile-downloads {
  display: grid;
  gap: 0.8rem;
  margin-top: 1.5rem;
  color: var(--link);
}
.mobile-source-note {
  padding: 2rem;
  background: var(--surface);
  border-radius: var(--radius);
  margin-top: 3rem;
}
.mobile-source-note h3 {
  margin-bottom: 0.8rem;
}
.mobile-mechanism {
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
}
.mobile-flow {
  padding: 1.5rem;
  background: #f5f7fa;
}
.mobile-flow svg {
  width: 100%;
  height: auto;
  display: block;
}
.mobile-flow-controls {
  padding: 2rem;
}
.mobile-flow-controls h3 {
  margin-block: 0.7rem;
  font-size: 1.5rem;
}
.mobile-flow-controls > p:not(.eyebrow) {
  color: var(--muted);
  max-width: 50rem;
  min-height: 3.2rem;
}
.m01-ball {
  transform: translate(0, 0);
  transition: transform 450ms ease;
}
[data-step='1'] .m01-ball {
  transform: translate(0, 82px);
}
[data-step='2'] .m01-ball {
  transform: translate(185px, 82px);
}
[data-step='3'] .m01-ball {
  transform: translate(395px, 82px);
}
[data-step='4'] .m01-ball {
  transform: translate(630px, 82px);
}
.m01-disk {
  transform-origin: 170px 170px;
}
.m01-wheel {
  transform-box: fill-box;
  transform-origin: center;
}
.playing .m01-disk {
  animation: m01-turn 6s linear infinite;
}
.playing .m01-wheel {
  animation: m01-turn 1.5s linear infinite;
}
.playing .m01-wheel.reverse {
  animation-direction: reverse;
}
@keyframes m01-turn {
  to {
    transform: rotate(360deg);
  }
}
@media (max-width: 900px) {
  .mobile-hero,
  .mobile-pcb-grid {
    grid-template-columns: 1fr;
  }
  .mobile-hero {
    gap: 2rem;
    padding-block: 2.5rem 3rem;
  }
  .mobile-hero-art {
    max-width: 42rem;
    width: 100%;
    margin-inline: auto;
  }
  .mobile-section .section-heading {
    display: block;
  }
  .mobile-section .section-heading > p {
    margin-top: 1.5rem;
    max-width: none;
  }
  .mobile-section {
    padding-block: 3rem;
  }
}
@media (max-width: 600px) {
  .launcher-picker {
    padding-top: 2rem;
  }
  .launcher-tabs {
    grid-template-columns: 1fr;
    gap: 0.6rem;
  }
  .launcher-tabs button {
    padding: 1rem;
  }
  .mobile-facts {
    grid-template-columns: 1fr;
    gap: 1.8rem;
  }
  .mobile-hero-art,
  .mobile-diagram,
  .mobile-flow {
    padding: 0.7rem;
  }
  .mobile-flow-controls,
  .mobile-source-note {
    padding: 1.25rem;
  }
  .mobile-table {
    min-width: 600px;
  }
}
.hien-ball {
  transform: translate(0, 0);
  transition: transform 450ms ease;
}
#hien-flow[data-step='1'] .hien-ball {
  transform: translate(0, 75px);
}
#hien-flow[data-step='2'] .hien-ball {
  transform: translate(110px, 120px);
}
#hien-flow[data-step='3'] .hien-ball {
  transform: translate(385px, 120px);
}
#hien-flow[data-step='4'] .hien-ball {
  transform: translate(660px, 95px);
}
.hien-agitator {
  transform-origin: 150px 100px;
}
.hien-flywheel {
  transform-box: fill-box;
  transform-origin: center;
}
.playing .hien-agitator {
  animation: hien-turn 4s linear infinite;
}
.playing .hien-flywheel {
  animation: hien-turn 0.8s linear infinite;
}
.playing .hien-flywheel.reverse {
  animation-direction: reverse;
}
@keyframes hien-turn {
  to {
    transform: rotate(360deg);
  }
}
.hien-modes-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 2rem;
  margin-top: 2rem;
  align-items: start;
}
.hien-mode-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.hien-mode-btn {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.1rem 1.25rem;
  background: var(--surface);
  border: 2px solid transparent;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: all 0.2s ease;
}
.hien-mode-btn:hover {
  background: var(--surface-hover, rgba(0, 0, 0, 0.04));
}
.hien-mode-btn.active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--text);
}
.hien-mode-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 2rem;
}
.hien-mode-card h3 {
  margin-top: 0;
  font-size: 1.5rem;
}
.hien-mode-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-block: 1.5rem;
}
.hien-mode-specs div {
  padding: 1rem;
  background: var(--surface-subtle, rgba(0, 0, 0, 0.02));
  border-radius: 0.75rem;
}
.hien-mode-specs b {
  display: block;
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 0.35rem;
}
.hien-mode-specs span {
  font-size: 0.95rem;
  font-weight: 500;
}
@media (max-width: 900px) {
  .hien-modes-grid {
    grid-template-columns: 1fr;
  }
}
@media (prefers-reduced-motion: reduce) {
  .m01-ball,
  .hien-ball {
    transition: none;
  }
  .playing .m01-disk,
  .playing .m01-wheel,
  .playing .hien-agitator,
  .playing .hien-flywheel {
    animation: none;
  }
}

.thrower-views { display:flex; flex-wrap:wrap; gap:1rem; margin:1.5rem 0; }
.thrower-reference { display:block; max-width:100%; max-height:420px; object-fit:contain; margin:auto; }
#thrower-workbench, #thrower-wiring3d { scroll-margin-top:100px; }