:root {
  --bed: #e3e7e8;
  --plate: #f2f4f4;
  --ink: #182027;
  --ink-soft: #46535c;
  --wall: #f0651a;
  --bridge: #2a57d6;
  --support: #0e9a8c;
  --line: #b6bec2;

  --f-display: "Archivo", system-ui, sans-serif;
  --f-mono: "Spline Sans Mono", ui-monospace, Consolas, monospace;

  --gutter: 48px;
  --pad: clamp(1.25rem, 3vw, 2rem);
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding-left: var(--gutter);
  background: var(--bed);
  color: var(--ink);
  font-family: var(--f-display);
  font-size: 1.0625rem;
  line-height: 1.55;
  font-stretch: 100%;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }

a { color: var(--bridge); text-underline-offset: 0.2em; }
a:hover { color: var(--ink); }

:focus-visible {
  outline: 3px solid var(--bridge);
  outline-offset: 3px;
}

.wrap {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: var(--pad);
}

.mono, .plate__result, .plate__dim, .heat b, .fine { font-family: var(--f-mono); }
.mono { font-size: 0.92em; }

.sr {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 50;
  padding: 0.6rem 1rem;
  background: var(--ink);
  color: var(--bed);
}
.skip:focus { left: var(--gutter); }

.todo {
  padding: 0 0.25em;
  background: rgba(240, 101, 26, 0.16);
  outline: 1px dashed var(--wall);
  color: inherit;
}

/* Z axis */
.zaxis {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 30;
  width: var(--gutter);
  background: var(--bed);
  border-right: 1px solid var(--ink);
}
.zaxis__ticks,
.zaxis__ticks::after {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
}
.zaxis__ticks {
  width: 6px;
  background: repeating-linear-gradient(to bottom, var(--ink) 0 1px, transparent 1px 8px);
}
.zaxis__ticks::after {
  content: "";
  width: 12px;
  background: repeating-linear-gradient(to bottom, var(--ink) 0 1px, transparent 1px 40px);
}
.zaxis__marker {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 0;
  border-top: 2px solid var(--wall);
  will-change: transform;
}
.zaxis__marker span {
  position: absolute;
  left: 4px;
  bottom: 4px;
  font: 500 10px/1 var(--f-mono);
  color: var(--ink);
}

/* Header */
.top {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--bed);
  border-bottom: 1px solid var(--line);
}
.top__in {
  display: flex;
  align-items: center;
  gap: 2rem;
  height: 56px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-right: auto;
  color: var(--ink);
  font-weight: 800;
  font-stretch: 125%;
  font-size: 1.05rem;
  text-decoration: none;
}
.top__nav { display: flex; gap: 1.75rem; }
.top__nav a {
  color: var(--ink);
  font-size: 0.95rem;
  text-decoration: none;
}
.top__nav a:hover { text-decoration: underline; text-underline-offset: 0.3em; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.85rem 1.35rem;
  background: var(--wall);
  border: 1px solid var(--ink);
  color: var(--ink);
  font: 700 1rem/1.2 var(--f-display);
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.12s, box-shadow 0.12s;
  box-shadow: 3px 3px 0 var(--ink);
}
.btn:hover { color: var(--ink); transform: translate(-1px, -1px); box-shadow: 4px 4px 0 var(--ink); }
.btn:active { transform: translate(3px, 3px); box-shadow: 0 0 0 var(--ink); }
.btn--ghost { background: transparent; }
.btn--small { padding: 0.5rem 0.9rem; font-size: 0.9rem; box-shadow: 2px 2px 0 var(--ink); }

/* Hero */
.hero { padding-block: clamp(2.5rem, 6vw, 5rem) clamp(3rem, 7vw, 6rem); }

.print {
  position: relative;
  font-weight: 800;
  font-stretch: 125%;
  font-size: clamp(2.6rem, 10.2vw, 8rem);
  line-height: 0.94;
  letter-spacing: -0.02em;
  padding-bottom: 0.14em;
}
.print__ghost,
.print__fill { display: block; }
.print__ghost {
  color: transparent;
  -webkit-text-stroke: 1px var(--line);
}
.print__fill {
  position: absolute;
  inset: 0;
  color: transparent;
  background: repeating-linear-gradient(to bottom, var(--ink) 0 3px, #34434e 3px 4px);
  -webkit-background-clip: text;
  background-clip: text;
  animation: layer-up 2.6s steps(34, end) 0.3s both;
}
.print__nozzle {
  position: absolute;
  left: -0.12em;
  right: -0.12em;
  top: 100%;
  height: 3px;
  background: var(--wall);
  animation: nozzle-travel 2.6s steps(34, end) 0.3s both, nozzle-off 0.25s linear 2.9s forwards;
}
@keyframes layer-up {
  from { clip-path: inset(100% 0 0 0); }
  to { clip-path: inset(0 0 0 0); }
}
@keyframes nozzle-travel {
  from { top: 100%; }
  to { top: 0; }
}
@keyframes nozzle-off {
  to { opacity: 0; }
}

.hero__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 400px);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
  margin-top: clamp(2rem, 4vw, 3.5rem);
}
.hero__sub {
  max-width: 34rem;
  font-size: clamp(1.15rem, 1.6vw, 1.35rem);
  line-height: 1.5;
}
.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}
.hero__note {
  margin-top: 1.25rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

/* Build plate */
.hero__plate { padding-left: 1.75rem; }
.plate {
  position: relative;
  aspect-ratio: 1;
  background-color: var(--plate);
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px),
    linear-gradient(rgba(24, 32, 39, 0.28) 1px, transparent 1px),
    linear-gradient(90deg, rgba(24, 32, 39, 0.28) 1px, transparent 1px);
  background-size: 6.25% 6.25%, 6.25% 6.25%, 25% 25%, 25% 25%;
  border: 1px solid var(--ink);
}
.plate__drop {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.4rem;
  padding: 1.5rem;
  cursor: pointer;
  text-align: center;
}
.plate__title {
  align-self: center;
  padding: 0.35rem 0.7rem;
  background: var(--plate);
  font-weight: 700;
  font-stretch: 112%;
  font-size: 1.1rem;
}
.plate__hint {
  align-self: center;
  padding: 0.15rem 0.5rem;
  background: var(--plate);
  color: var(--ink-soft);
  font-size: 0.88rem;
  max-width: 22ch;
}
.plate.is-over { outline: 3px solid var(--wall); outline-offset: 3px; }
.plate.has-file .plate__drop { align-items: flex-end; justify-content: flex-end; }
.plate.has-file .plate__title,
.plate.has-file .plate__hint { display: none; }
.plate:focus-within { outline: 3px solid var(--bridge); outline-offset: 3px; }

.plate__part {
  position: absolute;
  background: rgba(240, 101, 26, 0.88);
  border: 2px solid var(--ink);
  transition: width 0.35s cubic-bezier(.2,.7,.2,1), height 0.35s cubic-bezier(.2,.7,.2,1);
  pointer-events: none;
}
.plate__part.is-over { background: rgba(42, 87, 214, 0.2); border-color: var(--bridge); border-style: dashed; }

.plate__dim {
  position: absolute;
  font-size: 11px;
  color: var(--ink-soft);
  pointer-events: none;
}
.plate__dim--x { left: 0; right: 0; bottom: -1.6rem; text-align: center; }
.plate__dim--y { left: -1.6rem; top: 0; bottom: 0; writing-mode: vertical-rl; transform: rotate(180deg); text-align: center; }

.plate__result {
  margin-top: 2.2rem;
  min-height: 3.2em;
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--ink-soft);
}
.plate__result.is-ok { color: var(--ink); }
.plate__result.is-ok::before { content: ""; display: inline-block; width: 0.6em; height: 0.6em; margin-right: 0.5em; background: var(--support); }
.plate__result.is-warn { color: var(--ink); }
.plate__result.is-warn::before { content: ""; display: inline-block; width: 0.6em; height: 0.6em; margin-right: 0.5em; background: var(--wall); }

/* Sections */
.sec { border-top: 1px solid var(--ink); padding-block: clamp(2.5rem, 6vw, 4.5rem); }
.sec__grid {
  display: grid;
  grid-template-columns: minmax(200px, 300px) minmax(0, 1fr);
  gap: clamp(1.5rem, 5vw, 4rem);
  align-items: start;
}
.sec__title {
  position: sticky;
  top: 80px;
  font-weight: 800;
  font-stretch: 118%;
  font-size: clamp(1.4rem, 2.2vw, 1.85rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
}
.sec__body { min-width: 0; }

.prose { max-width: 38rem; display: grid; gap: 1.1rem; }
.lead { font-size: 1.35rem; line-height: 1.4; font-weight: 500; }

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1rem, 3vw, 2.5rem);
  counter-reset: step;
}
.steps li {
  position: relative;
  padding-top: 1.75rem;
  border-top: 3px solid var(--ink);
  counter-increment: step;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  top: -3px;
  left: 0;
  padding: 0.15rem 0.6rem;
  background: var(--wall);
  border: 1px solid var(--ink);
  border-top: 0;
  font: 500 0.85rem/1.4 var(--f-mono);
}
.steps h3 { margin-top: 0.5rem; font-size: 1.25rem; font-weight: 700; font-stretch: 108%; line-height: 1.2; }
.steps p { margin-top: 0.6rem; color: var(--ink-soft); }

/* Materials */
.mat { width: 100%; border-collapse: collapse; }
.mat th, .mat td { padding: 1.1rem 1rem 1.1rem 0; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
.mat thead th {
  padding-top: 0;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--ink);
  color: var(--ink-soft);
  font-size: 0.85rem;
  font-weight: 500;
}
.mat tbody th { font-size: 1.5rem; font-weight: 800; font-stretch: 125%; line-height: 1.2; }
.mat td { color: var(--ink); font-size: 0.98rem; }
.mat td:nth-child(3) { color: var(--ink-soft); }
.mat td:last-child { width: 11rem; padding-right: 0; }

.heat { display: flex; align-items: center; gap: 0.6rem; }
.heat i {
  flex: 1;
  height: 10px;
  background: linear-gradient(90deg, var(--wall) calc(var(--t) * 1%), var(--line) 0);
  border: 1px solid var(--ink);
}
.heat b { font-size: 0.78rem; font-weight: 500; white-space: nowrap; }
.heat--none { display: block; color: var(--ink-soft); font: 400 0.78rem/1.6 var(--f-mono); }

.callout {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.25rem 1.5rem;
  margin-top: 2.25rem;
  padding: 1.1rem 0;
  border-block: 1px solid var(--ink);
}
.callout__big { font-weight: 700; font-stretch: 110%; font-size: 1.15rem; }
.callout__big .mono { display: inline-block; margin-left: 0.4rem; padding: 0.1rem 0.5rem; background: var(--plate); border: 1px solid var(--bridge); color: var(--bridge); }
.callout p { color: var(--ink-soft); }

.below {
  margin-top: 1.75rem;
  max-width: 40rem;
  padding-left: 1.1rem;
  border-left: 4px solid var(--wall);
}

/* Uses */
.uses { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(1.5rem, 3vw, 2.5rem); }
.photo {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--plate);
  border: 1px solid var(--ink);
}
.photo img { display: block; width: 100%; height: 100%; object-fit: cover; }
.uses h3 { margin-top: 1rem; font-size: 1.2rem; font-weight: 700; font-stretch: 108%; line-height: 1.25; }
.uses p { margin-top: 0.35rem; color: var(--ink-soft); }
.fine { margin-top: 1.75rem; font-size: 0.8rem; color: var(--ink-soft); }

/* Lists with layer markers */
.checks { display: grid; gap: 1.1rem; max-width: 42rem; }
.checks li { position: relative; padding-left: 1.75rem; }
.checks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.8rem;
  height: 0.3rem;
  background: var(--wall);
  box-shadow: 0 -0.4rem 0 var(--ink);
}
.turn { margin-top: 2rem; padding: 1rem 1.1rem; background: var(--plate); border: 1px solid var(--ink); max-width: 42rem; }

/* FAQ */
.faq { max-width: 44rem; border-top: 1px solid var(--ink); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  position: relative;
  padding: 1.1rem 2.5rem 1.1rem 0;
  font-weight: 700;
  font-stretch: 108%;
  cursor: pointer;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after,
.faq summary::before {
  content: "";
  position: absolute;
  right: 0.25rem;
  top: 50%;
  width: 14px;
  height: 2px;
  background: var(--ink);
  transition: transform 0.2s;
}
.faq summary::after { transform: rotate(90deg); }
.faq details[open] summary::after { transform: rotate(0); background: var(--wall); }
.faq summary:hover { color: var(--bridge); }
.faq details p { padding: 0 2.5rem 1.25rem 0; color: var(--ink-soft); max-width: 38rem; }

/* Form */
.sec--form { background: var(--plate); }
.form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.4rem 1.5rem;
  max-width: 44rem;
}
.field { display: grid; gap: 0.4rem; border: 0; margin: 0; padding: 0; min-width: 0; align-content: start; }
.field--wide { grid-column: 1 / -1; }
.field label, .field legend { padding: 0; font-size: 0.9rem; font-weight: 600; }
.field legend { margin-bottom: 0.4rem; }
.field input[type="text"], .field input[type="email"], .field input[type="tel"],
.field input[type="number"], .field input[type="date"], .field select {
  width: 100%;
  padding: 0.7rem 0.75rem;
  background: var(--bed);
  border: 1px solid var(--ink);
  border-radius: 0;
  color: var(--ink);
  font: 400 1rem/1.3 var(--f-display);
}
.field input[type="file"] {
  width: 100%;
  padding: 0.6rem;
  background: var(--bed);
  border: 1px dashed var(--ink);
  font: 400 0.9rem var(--f-mono);
}
.opts { display: flex; flex-wrap: wrap; gap: 0.5rem 1.4rem; }
.opts label { display: inline-flex; align-items: center; gap: 0.5rem; font-weight: 400; font-size: 1rem; cursor: pointer; }
.opts input { width: 1.1rem; height: 1.1rem; accent-color: var(--wall); }
.form__send { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.5rem; margin-top: 0.5rem; }
.form__status { font-size: 0.95rem; }

/* Legal pages */
body.plain { padding-left: 0; }
.legal { max-width: 46rem; margin-inline: auto; padding-block: clamp(2.5rem, 6vw, 4.5rem); }
.legal h1 { font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 800; font-stretch: 125%; line-height: 1.05; letter-spacing: -0.02em; }
.legal__date { margin-top: 0.75rem; color: var(--ink-soft); font: 400 0.85rem var(--f-mono); }
.legal h2 { margin-top: 2.25rem; font-size: 1.2rem; font-weight: 700; font-stretch: 112%; }
.legal p, .legal ul { margin-top: 0.7rem; }
.legal ul { padding-left: 1.2rem; list-style: disc; }
.legal li { margin-top: 0.4rem; }

/* Footer */
.foot { background: var(--ink); color: var(--bed); padding-block: 2.5rem; font-size: 0.95rem; }
.foot__in { display: grid; gap: 0.4rem; }
.foot a { color: var(--bed); }
.foot .todo { background: rgba(240, 101, 26, 0.3); outline-color: var(--wall); }

/* Narrow */
@media (max-width: 900px) {
  :root { --gutter: 0px; }
  .zaxis { display: none; }
  .top__nav { display: none; }
  .hero__body { grid-template-columns: 1fr; }
  .hero__plate { padding-left: 1.75rem; max-width: 440px; }
  .sec__grid { grid-template-columns: 1fr; }
  .sec__title { position: static; }
  .steps { grid-template-columns: 1fr; gap: 2rem; }
  .uses { grid-template-columns: 1fr; }
  .form { grid-template-columns: 1fr; }

  .mat, .mat tbody, .mat tr, .mat th, .mat td { display: block; width: auto; }
  .mat thead { position: absolute; left: -999px; }
  .mat tr { padding: 1.1rem 0; border-bottom: 1px solid var(--line); }
  .mat th, .mat td { padding: 0 0 0.5rem; border: 0; }
  .mat td:last-child { width: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .print__fill, .print__nozzle { animation: none; }
  .print__nozzle { display: none; }
  .btn, .plate__part, .faq summary::before, .faq summary::after { transition: none; }
}