:root {
  color-scheme: light;
  --bg: #f3f6f1;
  --bg-soft: #e8eee8;
  --surface: #fbfdf9;
  --surface-2: #eef4ee;
  --ink: #15231b;
  --muted: #5e7066;
  --muted-2: #84948a;
  --line: rgba(21, 35, 27, 0.14);
  --line-strong: rgba(21, 35, 27, 0.24);
  --accent: #2f7d55;
  --accent-2: #dceee2;
  --accent-ink: #f8fff8;
  --warn: #a45b32;
  --shadow: rgba(33, 60, 43, 0.13);
  --wire-red: #b94c43;
  --wire-black: #2f3933;
  --wire-yellow: #b27a15;
  --wire-blue: #2f6fa8;
  --wire-green: #2f7d55;
  --wire-violet: #7759a6;
  --radius: 18px;
  --radius-lg: 26px;
  --max: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background:
    linear-gradient(180deg, rgba(47, 125, 85, 0.08), transparent 320px),
    var(--bg);
  color: var(--ink);
  font-family: Aptos, "Segoe UI", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 50;
  transform: translateY(-140%);
  border-radius: 999px;
  padding: 0.75rem 1rem;
  background: var(--ink);
  color: var(--surface);
  font-weight: 800;
  text-decoration: none;
}

.skip-link:focus {
  transform: translateY(0);
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  padding: 12px 16px 0;
  pointer-events: none;
}

.nav {
  width: min(var(--max), calc(100vw - 32px));
  height: 64px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 10px 0 12px;
  background: rgba(251, 253, 249, 0.88);
  backdrop-filter: blur(18px) saturate(130%);
  -webkit-backdrop-filter: blur(18px) saturate(130%);
  box-shadow: 0 18px 50px rgba(33, 60, 43, 0.12);
  pointer-events: auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 850;
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 0.82rem;
  font-weight: 900;
}

.nav-links {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: 0.18rem;
}

.nav-links a,
.nav-action {
  border-radius: 999px;
  padding: 0.64rem 0.82rem;
  color: var(--muted);
  font-weight: 760;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  background: var(--accent-2);
  color: var(--ink);
}

.nav-action {
  background: var(--ink);
  color: var(--surface);
}

.nav-links a:focus-visible,
.nav-action:focus-visible,
.button:focus-visible,
.wire-tab:focus-visible,
.step-nav a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.hero,
.overview,
.guide,
.final-cta,
.footer {
  width: min(var(--max), calc(100vw - 32px));
  margin: 0 auto;
}

.hero {
  min-height: 82dvh;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
  gap: clamp(1.4rem, 4vw, 4rem);
  align-items: center;
  padding: 3.8rem 0 4rem;
}

.hero-copy,
.section-heading,
.step-copy {
  max-width: 620px;
}

.kicker,
.step-label {
  width: fit-content;
  margin: 0 0 0.75rem;
  border: 1px solid rgba(47, 125, 85, 0.28);
  border-radius: 999px;
  padding: 0.38rem 0.68rem;
  background: var(--accent-2);
  color: var(--accent);
  font-weight: 850;
  line-height: 1.2;
}

h1,
h2,
h3,
p,
figure {
  margin-top: 0;
}

h1,
h2 {
  margin-bottom: 0.85rem;
  color: var(--ink);
  letter-spacing: 0;
  line-height: 1.03;
  font-weight: 880;
}

h1 {
  max-width: 11ch;
  font-size: clamp(2.35rem, 4.4vw, 3.65rem);
}

h2 {
  max-width: 18ch;
  font-size: clamp(1.65rem, 2.5vw, 2.35rem);
}

.lead,
.section-heading p,
.step-copy p,
.final-cta p {
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  align-items: center;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.8rem 1rem;
  font-weight: 820;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.button:hover,
.wire-tab:hover,
.step-nav a:hover {
  transform: translateY(-1px);
}

.button:active,
.wire-tab:active {
  transform: translateY(1px);
}

.button.primary {
  background: var(--accent);
  color: var(--accent-ink);
  box-shadow: 0 16px 30px rgba(47, 125, 85, 0.22);
}

.button.secondary {
  border-color: var(--line-strong);
  background: rgba(251, 253, 249, 0.74);
  color: var(--ink);
}

.robot-preview {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, rgba(47, 125, 85, 0.10), transparent 42%),
    var(--surface);
  box-shadow: 0 24px 70px var(--shadow);
  overflow: hidden;
}

.preview-shell {
  position: relative;
  min-height: 480px;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 54px 54px;
}

.robot-face {
  position: absolute;
  left: 50%;
  top: 34%;
  width: 220px;
  height: 158px;
  transform: translate(-50%, -50%);
  border-radius: 34px;
  background: #14251d;
  box-shadow: 0 24px 52px rgba(20, 37, 29, 0.24);
}

.robot-face span {
  position: absolute;
  top: 56px;
  width: 40px;
  height: 30px;
  border-radius: 50%;
  background: radial-gradient(circle at 38% 34%, #a9e6c1, var(--accent));
}

.robot-face span:first-child {
  left: 52px;
}

.robot-face span:nth-child(2) {
  right: 52px;
}

.robot-face i {
  position: absolute;
  left: 78px;
  right: 78px;
  bottom: 44px;
  height: 7px;
  border-radius: 999px;
  background: #a9e6c1;
}

.oled-line {
  position: absolute;
  left: 50%;
  top: 54%;
  transform: translateX(-50%);
  width: min(330px, calc(100% - 48px));
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 0.75rem;
  background: #14251d;
  color: #bceecf;
  text-align: center;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.9rem;
}

.bubble {
  position: absolute;
  width: 240px;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 0.9rem;
  background: rgba(251, 253, 249, 0.9);
  box-shadow: 0 14px 34px rgba(33, 60, 43, 0.12);
}

.bubble small {
  display: block;
  margin-bottom: 0.22rem;
  color: var(--accent);
  font-weight: 850;
}

.bubble strong {
  display: block;
  line-height: 1.32;
}

.bubble-left {
  left: 28px;
  top: 34px;
}

.bubble-right {
  right: 28px;
  bottom: 44px;
}

.mini-photo {
  position: absolute;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: 0 14px 34px rgba(33, 60, 43, 0.14);
}

.mini-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.photo-pi {
  left: 36px;
  bottom: 38px;
  width: 185px;
  height: 122px;
  transform: rotate(-5deg);
}

.photo-camera {
  right: 52px;
  top: 44px;
  width: 128px;
  height: 96px;
  transform: rotate(6deg);
}

.overview {
  padding: 4rem 0 2rem;
}

.section-heading {
  margin-bottom: 1.2rem;
}

.flow-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.8rem;
}

.flow-grid article {
  min-height: 150px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
  background: var(--surface);
  box-shadow: 0 12px 32px rgba(33, 60, 43, 0.08);
}

.flow-grid span {
  display: block;
  margin-bottom: 0.48rem;
  color: var(--accent);
  font-weight: 850;
}

.flow-grid strong {
  display: block;
  line-height: 1.35;
}

.guide {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 1.2rem;
  padding: 4rem 0;
}

.step-nav {
  position: sticky;
  top: 92px;
  align-self: start;
  display: grid;
  gap: 0.45rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.7rem;
  background: rgba(251, 253, 249, 0.78);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.step-nav a {
  border-radius: 12px;
  padding: 0.62rem 0.7rem;
  color: var(--muted);
  font-weight: 760;
  text-decoration: none;
  transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}

.step-nav a.is-active,
.step-nav a:hover {
  background: var(--accent-2);
  color: var(--ink);
}

.steps {
  display: grid;
  gap: 1rem;
}

.step-card {
  scroll-margin-top: 92px;
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(360px, 1.14fr);
  gap: 1.2rem;
  align-items: stretch;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.2rem;
  background: rgba(251, 253, 249, 0.82);
  box-shadow: 0 18px 48px rgba(33, 60, 43, 0.09);
}

.compact-step {
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
}

.wire-step {
  grid-template-columns: minmax(280px, 0.7fr) minmax(500px, 1.3fr);
  align-items: start;
}

.wire-step .step-copy {
  max-width: none;
}

.plain-list {
  display: grid;
  gap: 0.5rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.plain-list li {
  border-left: 3px solid var(--accent);
  padding-left: 0.8rem;
  color: var(--muted);
}

.parts-board {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  grid-auto-rows: 170px;
  gap: 0.75rem;
}

.part-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-2);
}

.part-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.main-part {
  grid-row: span 2;
}

.wide {
  grid-column: span 2;
}

.part-card figcaption {
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.52rem 0.68rem;
  background: rgba(251, 253, 249, 0.88);
  color: var(--ink);
  font-weight: 820;
}

.wire-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.48rem;
  margin: 1rem 0 0.85rem;
}

.wire-tab {
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  padding: 0.58rem 0.75rem;
  font-weight: 820;
  transition: transform 180ms ease, background 180ms ease, color 180ms ease, border-color 180ms ease;
}

.wire-tab.is-active {
  border-color: transparent;
  background: var(--accent);
  color: var(--accent-ink);
}

.wire-note {
  min-height: 3.2rem;
  margin-bottom: 0;
  color: var(--accent);
  font-weight: 760;
}

.wiring-details {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
  align-items: stretch;
}

.wire-checklist {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.92rem;
  background: var(--surface);
}

.wire-checklist h3 {
  margin: 0 0 0.6rem;
  color: var(--ink);
  font-size: 1.02rem;
  line-height: 1.25;
}

.wire-checklist ol {
  display: grid;
  gap: 0.5rem;
  margin: 0;
  padding-left: 1.25rem;
  color: var(--muted);
}

.wire-checklist li::marker {
  color: var(--accent);
  font-weight: 900;
}

.wire-checklist strong {
  color: var(--ink);
  font-weight: 850;
}

.pin-table {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
}

.pin-table table {
  width: 100%;
  min-width: 0;
  border-collapse: collapse;
  font-size: 0.9rem;
  line-height: 1.35;
}

.pin-table caption {
  padding: 0.7rem 0.8rem;
  background: var(--accent-2);
  color: var(--accent);
  text-align: left;
  font-weight: 850;
}

.pin-table th,
.pin-table td {
  padding: 0.62rem 0.72rem;
  border-top: 1px solid var(--line);
  vertical-align: top;
  text-align: left;
}

.pin-table th {
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 850;
}

.pin-table td {
  color: var(--muted);
}

.pin-table td:first-child,
.pin-table td:nth-child(2) {
  color: var(--ink);
  font-weight: 820;
}

.wire-swatch {
  display: inline-block;
  width: 0.72rem;
  height: 0.72rem;
  margin-right: 0.42rem;
  border: 1px solid rgba(21, 35, 27, 0.18);
  border-radius: 50%;
  vertical-align: -0.05rem;
}

.wire-color {
  display: inline-flex;
  align-items: center;
}

.swatch-red {
  background: var(--wire-red);
}

.swatch-black {
  background: var(--wire-black);
}

.swatch-yellow {
  background: var(--wire-yellow);
}

.swatch-blue {
  background: var(--wire-blue);
}

.swatch-green {
  background: var(--wire-green);
}

.swatch-violet {
  background: var(--wire-violet);
}

.wiring-panel {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-2);
}

.wiring-panel svg {
  width: 100%;
  height: auto;
  aspect-ratio: 940 / 600;
  min-height: 470px;
}

.panel-bg {
  fill: #f7faf5;
  stroke: rgba(21, 35, 27, 0.12);
}

.device rect:first-child {
  fill: #dfeae1;
  stroke: rgba(21, 35, 27, 0.16);
}

.device text {
  fill: var(--ink);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 14px;
  font-weight: 760;
}

.pi rect:nth-of-type(n + 2),
.sound rect:nth-of-type(n + 2) {
  fill: rgba(47, 125, 85, 0.12);
}

.oled rect:nth-of-type(2) {
  fill: #15231b;
}

.oled text:nth-of-type(1) {
  fill: #d9f6e4;
}

.pins rect {
  fill: #e5c15d;
}

.pins circle {
  fill: #33280f;
}

.pin-title {
  fill: var(--muted);
  font-size: 12px;
}

.pin-tags {
  opacity: 0;
  transition: opacity 180ms ease;
}

.pin-tags text {
  fill: var(--ink);
  stroke: #f7faf5;
  stroke-width: 4px;
  paint-order: stroke;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 11.5px;
  font-weight: 820;
}

.wiring-panel[data-active-wire="oled"] .pin-tags-oled,
.wiring-panel[data-active-wire="button"] .pin-tags-button,
.wiring-panel[data-active-wire="camera"] .pin-tags-camera,
.wiring-panel[data-active-wire="audio"] .pin-tags-audio {
  opacity: 1;
}

.camera circle:first-of-type,
.speaker circle:first-of-type {
  fill: #15231b;
}

.camera circle:nth-of-type(2),
.speaker circle:nth-of-type(2),
.button circle:nth-of-type(2),
.amp circle {
  fill: var(--accent);
}

.button circle:first-of-type {
  fill: #d1ded4;
}

.wire path {
  fill: none;
  stroke: rgba(94, 112, 102, 0.38);
  stroke-width: 6;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.24;
  transition: opacity 180ms ease, stroke-width 180ms ease;
}

.wire .lead-vdd,
.wire .lead-vcc {
  stroke: var(--wire-red);
}

.wire .lead-gnd {
  stroke: var(--wire-black);
}

.wire .lead-scl {
  stroke: var(--wire-yellow);
}

.wire .lead-sda,
.wire .lead-usb,
.wire .lead-csi {
  stroke: var(--wire-blue);
}

.wire .lead-gpio,
.wire .lead-audio {
  stroke: var(--wire-green);
}

.wiring-panel[data-active-wire="oled"] .wire-oled path,
.wiring-panel[data-active-wire="button"] .wire-button path,
.wiring-panel[data-active-wire="camera"] .wire-camera path,
.wiring-panel[data-active-wire="audio"] .wire-audio path {
  stroke-dasharray: 10 12;
  stroke-width: 7;
  opacity: 1;
  animation: wireFlow 1.2s linear infinite;
}

.wire-labels {
  opacity: 0;
  transition: opacity 180ms ease;
  pointer-events: none;
}

.wire-labels text {
  fill: var(--accent);
  stroke: #f7faf5;
  stroke-width: 4px;
  paint-order: stroke;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 12.5px;
  font-weight: 820;
}

.wire-labels .lead-vdd,
.wire-labels .lead-vcc {
  fill: var(--wire-red);
}

.wire-labels .lead-gnd {
  fill: var(--wire-black);
}

.wire-labels .lead-scl {
  fill: var(--wire-yellow);
}

.wire-labels .lead-sda,
.wire-labels .lead-usb,
.wire-labels .lead-csi {
  fill: var(--wire-blue);
}

.wire-labels .lead-gpio,
.wire-labels .lead-audio {
  fill: var(--wire-green);
}

.wiring-panel[data-active-wire="oled"] .wire-label-oled,
.wiring-panel[data-active-wire="button"] .wire-label-button,
.wiring-panel[data-active-wire="camera"] .wire-label-camera,
.wiring-panel[data-active-wire="audio"] .wire-label-audio {
  opacity: 1;
}

.code-card,
.admin-card,
.check-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-2);
  overflow: hidden;
}

.code-card pre {
  margin: 0;
  overflow: auto;
  padding: 1rem;
  color: var(--ink);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.92rem;
  line-height: 1.55;
}

.admin-card {
  padding: 1rem;
}

.admin-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.9rem;
}

.admin-tabs span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.55rem 0.7rem;
  color: var(--muted);
  font-weight: 780;
}

.admin-tabs .active {
  background: var(--accent);
  color: var(--accent-ink);
}

.admin-row {
  display: grid;
  gap: 0.2rem;
  border-top: 1px solid var(--line);
  padding: 0.86rem 0;
}

.admin-row span {
  color: var(--muted);
}

.check-card {
  display: grid;
  align-content: center;
  gap: 0.65rem;
  padding: 1rem;
}

.check-card p {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.75rem;
  background: var(--surface);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.9rem;
}

.check-card span {
  display: inline-grid;
  min-width: 34px;
  margin-right: 0.5rem;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-ink);
  place-items: center;
  font-family: Aptos, "Segoe UI", ui-sans-serif, system-ui, sans-serif;
  font-weight: 900;
}

.final-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.4rem;
  margin-bottom: 3rem;
  background: var(--surface);
  box-shadow: 0 18px 48px rgba(33, 60, 43, 0.09);
}

.final-cta h2 {
  max-width: 16ch;
  font-size: clamp(1.75rem, 3vw, 2.65rem);
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid var(--line);
  padding: 1.4rem 0 2rem;
  color: var(--muted);
}

.footer strong {
  color: var(--ink);
}

[data-reveal] {
  opacity: 1;
  transform: none;
}

html.js [data-reveal] {
  transform: translateY(16px);
  transition: transform 520ms cubic-bezier(0.16, 1, 0.3, 1);
}

html.js [data-reveal].is-visible {
  transform: translateY(0);
}

@keyframes wireFlow {
  to {
    stroke-dashoffset: -44;
  }
}

@media (max-width: 1040px) {
  .nav {
    grid-template-columns: auto auto;
  }

  .nav-links {
    display: none;
  }

  .hero,
  .step-card,
  .compact-step,
  .final-cta {
    grid-template-columns: 1fr;
  }

  .wiring-details {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 3rem;
  }

  .guide {
    grid-template-columns: 1fr;
  }

  .step-nav {
    position: static;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (max-width: 680px) {
  body {
    font-size: 15px;
  }

  .site-header {
    padding: 10px 10px 0;
  }

  .nav {
    width: calc(100vw - 20px);
    height: 60px;
  }

  .brand span:last-child {
    display: none;
  }

  .nav-action {
    padding-inline: 0.9rem;
  }

  .hero,
  .overview,
  .guide,
  .final-cta,
  .footer {
    width: calc(100vw - 20px);
  }

  h1 {
    font-size: clamp(2.05rem, 10.2vw, 2.65rem);
  }

  h2 {
    max-width: 18ch;
    font-size: clamp(1.5rem, 6.6vw, 2rem);
  }

  .lead,
  .section-heading p,
  .step-copy p,
  .final-cta p {
    font-size: 1rem;
  }

  .button,
  .hero-actions {
    width: 100%;
  }

  .preview-shell {
    min-height: 410px;
  }

  .robot-face {
    top: 40%;
    width: 184px;
    height: 132px;
  }

  .robot-face span {
    top: 46px;
    width: 34px;
    height: 26px;
  }

  .robot-face span:first-child {
    left: 42px;
  }

  .robot-face span:nth-child(2) {
    right: 42px;
  }

  .robot-face i {
    left: 62px;
    right: 62px;
    bottom: 34px;
  }

  .oled-line {
    top: 59%;
  }

  .bubble {
    width: auto;
    left: 14px;
    right: 14px;
  }

  .bubble-left {
    top: 16px;
  }

  .bubble-right {
    display: none;
  }

  .photo-pi {
    left: 16px;
    bottom: 16px;
    width: 140px;
    height: 92px;
  }

  .photo-camera {
    right: 20px;
    top: 110px;
    width: 104px;
    height: 78px;
  }

  .flow-grid,
  .step-nav,
  .parts-board {
    grid-template-columns: 1fr;
  }

  .step-card {
    padding: 0.9rem;
  }

  .parts-board {
    grid-auto-rows: 210px;
  }

  .main-part,
  .wide {
    grid-row: auto;
    grid-column: auto;
  }

  .wiring-panel {
    overflow-x: auto;
  }

  .wiring-panel svg {
    width: 820px;
    max-width: none;
    min-height: 520px;
  }

  .wire-checklist {
    padding: 0.82rem;
  }

  .pin-table table,
  .pin-table tbody,
  .pin-table tr,
  .pin-table td {
    display: block;
    width: 100%;
  }

  .pin-table thead {
    display: none;
  }

  .pin-table tr {
    padding: 0.78rem 0.86rem;
    border-top: 1px solid var(--line);
  }

  .pin-table td {
    display: grid;
    grid-template-columns: 6.8rem minmax(0, 1fr);
    gap: 0.6rem;
    border-top: 0;
    padding: 0.18rem 0;
  }

  .pin-table caption {
    display: block;
    width: 100%;
    box-sizing: border-box;
  }

  .pin-table td::before {
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 850;
  }

  .pin-table td:nth-child(1)::before {
    content: "Màu";
  }

  .pin-table td:nth-child(2)::before {
    content: "Linh kiện";
  }

  .pin-table td:nth-child(3)::before {
    content: "Cắm vào";
  }

  .pin-table td:nth-child(4)::before {
    content: "Ghi chú";
  }

  .code-card pre,
  .check-card p {
    font-size: 0.84rem;
  }

  .footer {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

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

  html.js [data-reveal] {
    transform: none;
  }
}