/* Boost Control: instruction-booklet bricks on a baseplate */

:root {
  --red: #e3000b;
  --red-d: #a80008;
  --blue: #0055bf;
  --blue-d: #003c88;
  --yellow: #ffcf00;
  --yellow-d: #c99a00;
  --green: #00852b;
  --green-d: #005c1e;
  --orange: #ff6d00;
  --orange-d: #c45400;
  --ink: #1b1b1b;
  --paper: #fffdf6;
  --plate: #e8e2d2;
  --plate-stud: #d9d1bd;
  --heavy: "Arial Black", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--body);
  line-height: 1.45;
  /* Baseplate: studs seen from above */
  background-color: var(--plate);
  background-image:
    radial-gradient(circle at 50% 46%, var(--plate) 0 7px, transparent 7.5px),
    radial-gradient(circle at 50% 50%, var(--plate-stud) 0 9px, transparent 9.5px);
  background-size: 32px 32px;
}

a { color: inherit; }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 16px; }

/* ---------------------------------------------------------------- bricks */

.brick {
  --c: var(--blue);
  --d: var(--blue-d);
  position: relative;
  background: var(--c);
  border-radius: 6px;
  box-shadow: inset 0 -8px 0 var(--d), 0 6px 0 rgba(0, 0, 0, 0.12);
  margin-top: 14px; /* room for the studs */
}
/* Studs, seen from the side */
.brick::before {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  top: -12px;
  height: 12px;
  background: var(--c);
  border-radius: 5px 5px 0 0;
  -webkit-mask: repeating-linear-gradient(90deg, #000 0 30px, transparent 30px 52px);
  mask: repeating-linear-gradient(90deg, #000 0 30px, transparent 30px 52px);
  filter: brightness(1.12);
}
.brick.red { --c: var(--red); --d: var(--red-d); }
.brick.yellow { --c: var(--yellow); --d: var(--yellow-d); }
.brick.green { --c: var(--green); --d: var(--green-d); }
.brick.orange { --c: var(--orange); --d: var(--orange-d); }
.brick.white { --c: #ffffff; --d: #d8d4c8; outline: 2px solid #d8d4c8; outline-offset: -2px; }
.brick.white::before { filter: none; background: #e9e5da; }
.brick.dark { --c: #2b2b2b; --d: #111; }

/* ------------------------------------------------------------------ hero */

.hero {
  padding: 40px 0 24px;
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 28px;
  align-items: end;
}

.title {
  color: #fff;
  padding: 26px 26px 34px;
  transform: rotate(-1.5deg);
}
.title h1 {
  margin: 0;
  font-family: var(--heavy);
  font-weight: 900;
  font-size: clamp(2.6rem, 8vw, 5rem);
  line-height: 0.92;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  text-shadow: 0 4px 0 var(--red-d);
}
.title p {
  margin: 14px 0 0;
  font-size: clamp(1.05rem, 2.6vw, 1.35rem);
  font-weight: 700;
}

.buttons { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 26px; }

.btn {
  display: inline-block;
  font-family: var(--heavy);
  font-size: 1rem;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  padding: 14px 20px 20px;
  margin-top: 12px;
  color: #fff;
  transition: transform 80ms ease;
}
.btn.yellow { color: var(--ink); }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(4px); box-shadow: inset 0 -4px 0 var(--d); }
.btn[aria-disabled="true"] { cursor: default; }
.btn small {
  display: block;
  font-family: var(--body);
  font-weight: 700;
  font-size: 0.72rem;
  text-transform: none;
  letter-spacing: 0;
  opacity: 0.8;
}

/* The robot */
.bot-stage { position: relative; display: flex; justify-content: center; }
.bot {
  width: min(320px, 70vw);
  height: auto;
  animation: bob 3.2s ease-in-out infinite;
  filter: drop-shadow(0 18px 0 rgba(0, 0, 0, 0.08));
}
.bot .lamp { animation: blink-lamp 1.6s steps(1) infinite; }
.bot .eyes { transform-origin: 512px 470px; animation: blink 5s infinite; }

.bubble {
  position: absolute;
  top: 6%;
  right: 2%;
  background: #fff;
  border: 3px solid var(--ink);
  border-radius: 14px;
  padding: 8px 12px;
  font-family: var(--heavy);
  font-size: 0.9rem;
  transform: rotate(4deg);
}
.bubble::after {
  content: "";
  position: absolute;
  left: 18px;
  bottom: -16px;
  border: 7px solid transparent;
  border-top: 9px solid var(--ink);
}

@keyframes bob {
  0%, 100% { transform: translateY(0) rotate(-2deg); }
  50% { transform: translateY(-14px) rotate(2deg); }
}
@keyframes blink-lamp {
  0% { fill: #ff6d00; }
  50% { fill: #ffcf00; }
}
@keyframes blink {
  0%, 92%, 100% { transform: scaleY(1); }
  95% { transform: scaleY(0.1); }
}

/* ------------------------------------------------------------- booklet */

.sheet {
  background: var(--paper);
  border: 3px solid var(--ink);
  border-radius: 10px;
  padding: 26px 22px 30px;
  margin: 34px 0;
  position: relative;
  box-shadow: 8px 8px 0 var(--ink);
}
.sheet .page {
  position: absolute;
  right: 14px;
  bottom: 8px;
  font-family: var(--heavy);
  font-size: 0.85rem;
  opacity: 0.35;
}

h2 {
  font-family: var(--heavy);
  text-transform: uppercase;
  font-size: clamp(1.4rem, 4vw, 2rem);
  letter-spacing: -0.01em;
  margin: 0 0 18px;
}

/* Parts list: "1x" callouts like the start of every manual */
.parts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 14px;
}
.parts li {
  border: 2px dashed #b9b2a0;
  border-radius: 8px;
  padding: 12px 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}
.parts .qty { font-family: var(--heavy); font-size: 1.5rem; color: var(--blue); }
.parts .swatch {
  width: 28px;
  height: 20px;
  border-radius: 3px;
  flex: none;
  background: var(--s);
  box-shadow: inset 0 -4px 0 rgba(0, 0, 0, 0.2);
}

/* Steps */
.steps { display: grid; gap: 26px; }
.step { display: grid; grid-template-columns: 64px 1fr; gap: 16px; align-items: start; }
.step .n {
  font-family: var(--heavy);
  font-size: 2.6rem;
  line-height: 1;
  text-align: center;
  background: var(--yellow);
  border: 3px solid var(--ink);
  border-radius: 10px;
  padding: 8px 0 10px;
}
.step h3 { font-family: var(--heavy); text-transform: uppercase; margin: 2px 0 8px; font-size: 1.25rem; }
.step p { margin: 0; }

.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 4px; }
.chip {
  padding: 8px 14px 12px;
  font-weight: 800;
  color: #fff;
  font-size: 0.95rem;
}
.chip.yellow, .chip.white { color: var(--ink); }

/* Controls: each input is a little brick */
.keys {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px 14px;
  margin-top: 8px;
}
@media (max-width: 760px) { .keys { grid-template-columns: repeat(2, 1fr); } }
.key { padding: 12px 14px 18px; color: #fff; }
.key.yellow, .key.white { color: var(--ink); }
.key b { display: block; font-family: var(--heavy); font-size: 1.1rem; }
.key span { font-weight: 700; opacity: 0.92; }

/* Where it runs */
.where {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 22px 14px;
}
.where .brick { padding: 14px 16px 20px; color: #fff; }
.where .brick.yellow { color: var(--ink); }
.where b { display: block; font-family: var(--heavy); text-transform: uppercase; }
.where a { font-weight: 800; }
.footnote { margin: 18px 0 0; font-weight: 700; }

/* ---------------------------------------------------------------- footer */

footer { padding: 10px 0 40px; font-size: 0.9rem; }
footer .sheet { box-shadow: 4px 4px 0 var(--ink); padding: 16px 18px; margin: 10px 0 0; }
footer nav { display: flex; flex-wrap: wrap; gap: 18px; font-weight: 800; margin-bottom: 8px; }
footer p { margin: 0; }

/* ----------------------------------------------------------- privacy page */

.doc { max-width: 760px; }
.doc h1 { font-family: var(--heavy); text-transform: uppercase; font-size: clamp(2rem, 6vw, 3rem); margin: 0; }
.doc h2 { font-size: 1.15rem; margin: 26px 0 6px; }
.doc p { margin: 0; }
.doc .stamp {
  display: inline-block;
  margin: 12px 0 14px;
  font-family: var(--heavy);
  text-transform: uppercase;
  color: var(--green);
  border: 3px solid var(--green);
  border-radius: 8px;
  padding: 4px 10px;
  transform: rotate(-3deg);
}
.back { display: inline-block; margin: 28px 0 0; font-family: var(--heavy); text-transform: uppercase; text-decoration: none; }

/* ------------------------------------------------------------ responsive */

@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; padding-top: 24px; }
  .bot-stage { order: -1; }
  .bot { width: min(220px, 58vw); }
  .title { transform: none; }
  .sheet { padding: 22px 16px 28px; box-shadow: 5px 5px 0 var(--ink); }
  .step { grid-template-columns: 48px 1fr; }
  .step .n { font-size: 1.9rem; }
}

@media (prefers-reduced-motion: reduce) {
  .bot, .bot .lamp, .bot .eyes { animation: none; }
  .btn { transition: none; }
}