/* ============================================================
   instructions.css: /instructions/, the LEGO instruction booklet.
   The site as the booklet that comes in the box: a numbered step
   per page, a parts list per step, and a drawn brick beside each
   one. Every brick here is CSS and SVG; nothing loads an image,
   and no studio logo or wordmark is reproduced anywhere.
   ============================================================ */

/* these pages load no shared stylesheet, so they carry their own reset */
* { margin: 0; padding: 0; box-sizing: border-box; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; color: inherit; }
img, svg { display: block; max-width: 100%; }
html.smooth { scroll-behavior: smooth; }
.vh { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.lg {
  --iw-a: #f5d222;   /* the shared world button, interface-world.css */
  --iw-bg: #f7f7f4;
  --sans:  "Space Grotesk", system-ui, sans-serif;
  --mono:  "JetBrains Mono", ui-monospace, monospace;
  /* the booklet is printed on white, which is the whole visual joke: every
     other interface on this site is a dark terminal */
  --paper: #f7f7f4;
  --ink:   #16181c;
  --dim:   #4a4e56;
  --mute:  #6d727c;
  --line:  rgba(22, 24, 28, .14);
  --y:     #f5d222;
  --r:     #e03a3a;
  --b:     #4f9fe0;
  --ease:  cubic-bezier(.16, 1, .3, 1);

  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ───────────── the table ─────────────
   A sheet of studs under the whole booklet: two radial gradients per stud,
   tiled, which is a background rather than a thousand elements. */
.lg-table { position: fixed; inset: 0; z-index: 0; pointer-events: none; }
.lg-table > * { position: absolute; inset: 0; }
.lg-studs {
  background-image:
    radial-gradient(circle at 50% 42%, rgba(22,24,28,.055) 5.5px, transparent 6px),
    radial-gradient(circle at 50% 58%, rgba(255,255,255,.7) 5.5px, transparent 6px);
  background-size: 26px 26px;
  background-position: 0 0, 0 1px;
  opacity: .9;
}
.lg-light {
  background: radial-gradient(70% 50% at 50% 0%, rgba(255,255,255,.9), transparent 70%);
}

/* ───────────── top bar ───────────── */
.lg-top {
  position: relative; z-index: 2;
  display: flex; align-items: center; justify-content: space-between; gap: 0.6rem 1rem; flex-wrap: wrap;
  padding: calc(1rem + env(safe-area-inset-top, 0px)) clamp(1rem, 4vw, 2.6rem) 1rem;
  border-bottom: 2px solid var(--ink);
  font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--dim);
}
.lg-exit { display: inline-flex; align-items: center; gap: 0.45rem; font-weight: 500; }
.lg-exit svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 2.4; }
.lg-exit:hover { color: var(--ink); }
.lg-top-pc { font-weight: 500; }

.lg-main { position: relative; z-index: 1; padding: 0 clamp(1rem, 4vw, 2.6rem); max-width: 1180px; margin-inline: auto; }

/* ───────────── the box front ───────────── */
.lg-hero {
  display: grid; grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
  gap: clamp(1.4rem, 4vw, 3rem); align-items: start;
  padding: clamp(2rem, 5vw, 3.4rem) 0;
}

/* the box: yellow, with the age badge in the corner, like every set ever sold */
.lg-box {
  position: relative; border: 3px solid var(--ink); border-radius: 10px;
  background: linear-gradient(180deg, var(--y), #e6c010);
  padding: 1.2rem 1.2rem 1.4rem;
  box-shadow: 0 14px 0 -4px rgba(22,24,28,.18), 0 20px 40px -20px rgba(22,24,28,.5);
}
.lg-box-age {
  position: absolute; top: 0.7rem; right: 0.7rem;
  width: 34px; height: 34px; border-radius: 50%; border: 2px solid var(--ink);
  background: var(--paper); display: grid; place-items: center;
  font-family: var(--mono); font-size: 0.7rem; font-weight: 500;
}
.lg-box-art { background: rgba(255,255,255,.4); border: 2px solid rgba(22,24,28,.25); border-radius: 6px; padding: 0.6rem; }
.lg-box-art svg { width: min(200px, 100%); margin-inline: auto; }

.lg-fig-sh { fill: rgba(22,24,28,.18); }
.lg-fig-y { fill: #f5d222; stroke: #16181c; stroke-width: 3; }
.lg-fig-eye { fill: #16181c; }
.lg-fig-mouth { fill: none; stroke: #16181c; stroke-width: 3; stroke-linecap: round; }
.lg-fig-t { fill: #e03a3a; stroke: #16181c; stroke-width: 3; }
.lg-fig-l { fill: #4f9fe0; stroke: #16181c; stroke-width: 3; }
.lg-fig-hand { fill: #f5d222; stroke: #16181c; stroke-width: 3; }

.lg-box-k {
  margin-top: 0.9rem; font-family: var(--mono); font-size: 0.6rem;
  letter-spacing: 0.18em; text-transform: uppercase; color: rgba(22,24,28,.7);
}
.lg-box-t { font-size: clamp(1.5rem, 4vw, 2.1rem); line-height: 1.05; letter-spacing: -0.02em; margin-top: 0.2rem; }
.lg-box-s { margin-top: 0.4rem; font-size: 0.8rem; color: rgba(22,24,28,.75); }

.lg-lede { font-size: 0.94rem; line-height: 1.75; color: var(--dim); max-width: 66ch; }
.lg-lede + .lg-lede { margin-top: 0.9rem; }

.lg-acts { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1.3rem; }
.lg-btn {
  display: inline-flex; align-items: center; gap: 0.4rem; cursor: pointer;
  padding: 0.6rem 1.1rem; border: 2px solid var(--ink); border-radius: 8px;
  background: var(--y); font-size: 0.82rem; font-weight: 600;
  box-shadow: 0 4px 0 -1px var(--ink);
  transition: transform .14s var(--ease), box-shadow .14s var(--ease);
}
.lg-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 0 -1px var(--ink); }
.lg-btn:active { transform: translateY(1px); box-shadow: 0 2px 0 -1px var(--ink); }
.lg-btn--ghost { background: var(--paper); }
.lg-btn:focus-visible { outline: 3px solid var(--b); outline-offset: 2px; }

.lg-specs {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 0.7rem; margin-top: 1.6rem;
  border-top: 2px solid var(--ink); padding-top: 1rem;
}
.lg-specs dt { font-family: var(--mono); font-size: 0.58rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--mute); }
.lg-specs dd { font-size: 1.05rem; font-weight: 600; margin-top: 0.15rem; }

.lg-btn--sm { padding: 0.45rem 0.8rem; font-size: 0.74rem; box-shadow: 0 3px 0 -1px var(--ink); }

/* ═══════════ the build so far ═══════════
   The model, stacked from whatever you have ticked off. */
.lg-build { padding-bottom: clamp(2rem, 5vw, 3.4rem); }
.lg-build-box {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: clamp(1rem, 3vw, 2rem); align-items: start;
}

/* the baseplate the pile sits on, and the pile itself */
.lg-model {
  position: relative; display: flex; flex-direction: column;
  align-items: center; justify-content: flex-end;
  min-height: 300px; padding: 1.4rem 1rem 0;
  border: 2px solid var(--ink); border-radius: 10px;
  background:
    linear-gradient(180deg, #fff, #efefea);
  box-shadow: 0 4px 0 -1px var(--ink);
  overflow: hidden;
}
.lg-model-plate {
  order: 2; width: min(86%, 260px); height: 18px; margin-top: 2px;
  border: 2px solid var(--ink); border-radius: 3px; background: var(--y);
  /* the studs along the front edge of a baseplate */
  background-image: radial-gradient(circle at 50% 50%, rgba(22,24,28,.22) 2.6px, transparent 3px);
  background-size: 14px 100%;
}
/* the stack grows upward, so it is column-reverse: the newest brick on top */
.lg-stack {
  order: 1; display: flex; flex-direction: column-reverse; align-items: center;
  gap: 1px; width: 100%; padding-bottom: 2px;
}
.lg-stack .lg-brick {
  width: auto; height: 22px;
  /* each brick drops into place rather than appearing */
  animation: lg-drop .28s var(--ease) both;
}
@keyframes lg-drop {
  from { transform: translateY(-14px); opacity: 0; }
  to   { transform: none; opacity: 1; }
}
.lg-model-empty {
  position: absolute; inset: auto 1rem 50%; text-align: center;
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--mute);
}
.lg-model.is-built .lg-model-empty { display: none; }
.lg-model-cap { font-size: 0.8rem; color: var(--mute); line-height: 1.6; }

/* the progress panel beside the model */
.lg-build-side { display: flex; flex-direction: column; gap: 1rem; }
.lg-prog { border: 2px solid var(--ink); border-radius: 10px; padding: 0.9rem 1rem; background: #fff; }
.lg-prog-top {
  display: flex; justify-content: space-between; align-items: baseline;
  font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--mute); margin-bottom: 0.45rem;
}
.lg-prog-top b { font-size: 1.2rem; color: var(--ink); }
.lg-pbar { height: 12px; border: 2px solid var(--ink); border-radius: 3px; background: #fff; overflow: hidden; }
.lg-pbar i { display: block; height: 100%; width: 0; background: var(--y); transition: width .4s var(--ease); }
.lg-prog-n { margin-top: 0.6rem; font-size: 0.76rem; color: var(--dim); }

/* the four bags */
.lg-bags { list-style: none; display: grid; gap: 0.4rem; }
.lg-bags li {
  display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 0.6rem;
  border: 2px solid var(--ink); border-radius: 7px; padding: 0.45rem 0.7rem; background: #fff;
  font-size: 0.78rem;
}
.lg-bags li.is-done { background: var(--y); }
.lg-bags b {
  width: 20px; height: 20px; border: 2px solid var(--ink); border-radius: 50%;
  display: grid; place-items: center; font-size: 0.62rem; font-family: var(--mono);
  background: var(--paper);
}
.lg-bags em { font-style: normal; font-family: var(--mono); font-size: 0.66rem; color: var(--mute); }
.lg-bags li.is-done em { color: var(--ink); }

.lg-build-acts { display: flex; flex-wrap: wrap; gap: 0.5rem; }

/* ═══════════ the callout ═══════════
   The gray parts box in the corner of a real instruction page. */
.lg-callout-s { padding-bottom: clamp(2rem, 5vw, 3.4rem); }
.lg-callout {
  display: flex; align-items: center; gap: 1.2rem; flex-wrap: wrap;
  border: 2px solid var(--ink); border-radius: 10px;
  padding: 1.1rem 1.2rem; background: #e9e9e4;
  box-shadow: 0 4px 0 -1px var(--ink);
}
.lg-callout-bricks { display: flex; align-items: flex-end; gap: 0.5rem; flex-wrap: wrap; min-height: 32px; }
.lg-callout-bricks .lg-brick { width: auto; height: 30px; }
.lg-callout-t b { display: block; font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--mute); }
.lg-callout-t i { display: block; font-style: normal; font-size: 0.9rem; margin-top: 0.2rem; }

/* ═══════════ the back of the box ═══════════ */
.lg-boxback-s { padding-bottom: clamp(2rem, 5vw, 3.4rem); }
.lg-boxback { display: grid; gap: 0.8rem; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
.lg-feat {
  position: relative; border: 2px solid var(--ink); border-radius: 10px;
  padding: 2.2rem 1rem 1rem; background: #fff;
  box-shadow: 0 4px 0 -1px var(--ink);
}
.lg-feat-n {
  position: absolute; top: 0.6rem; left: 0.8rem;
  width: 24px; height: 24px; border: 2px solid var(--ink); border-radius: 50%;
  display: grid; place-items: center; background: var(--y);
  font-family: var(--mono); font-size: 0.7rem; font-weight: 700;
}
.lg-feat b { display: block; font-size: 0.95rem; font-weight: 600; line-height: 1.4; }
.lg-feat p { margin-top: 0.4rem; font-size: 0.8rem; line-height: 1.65; color: var(--dim); }
.lg-feat a {
  display: inline-block; margin-top: 0.7rem; font-family: var(--mono);
  font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--ink); border-bottom: 2px solid var(--y);
}
.lg-feat a:hover { border-bottom-color: var(--ink); }
.lg-smallprint {
  margin-top: 1.2rem; font-size: 0.7rem; line-height: 1.7; color: var(--mute); max-width: 76ch;
}

/* ───────────── the steps ───────────── */
.lg-steps { padding-bottom: clamp(2rem, 5vw, 3.4rem); }
.lg-h { font-size: clamp(1.3rem, 3vw, 1.8rem); letter-spacing: -0.01em; }
.lg-h-sub { color: var(--mute); font-size: 0.86rem; margin: 0.3rem 0 1.6rem; }

.lg-bag + .lg-bag { margin-top: 2.4rem; }
.lg-bag-h {
  display: flex; align-items: center; gap: 0.6rem;
  font-family: var(--mono); font-size: 0.72rem; font-weight: 500;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--dim);
  padding-bottom: 0.6rem; border-bottom: 2px dashed var(--line); margin-bottom: 1rem;
}
.lg-bag-n {
  width: 24px; height: 24px; flex: none; display: grid; place-items: center;
  border: 2px solid var(--ink); border-radius: 50%; background: var(--y);
  font-size: 0.68rem; color: var(--ink);
}

.lg-list { list-style: none; display: grid; gap: 0.6rem; }
/* two across where there is room: a booklet page shows more than one step */
@media (min-width: 760px) { .lg-list { grid-template-columns: 1fr 1fr; } }

.lg-step {
  position: relative; display: flex; align-items: center; gap: 0.8rem;
  padding: 0.75rem 0.9rem; border: 2px solid var(--ink); border-radius: 10px;
  background: #fff; box-shadow: 0 3px 0 -1px rgba(22,24,28,.5);
  transition: transform .14s var(--ease), box-shadow .14s var(--ease), background .14s var(--ease);
}
@media (hover: hover) {
  .lg-step:hover { transform: translateY(-2px); box-shadow: 0 6px 0 -1px rgba(22,24,28,.55); background: #fffdf2; }
}
.lg-step:focus-visible { outline: 3px solid var(--b); outline-offset: 2px; }

.lg-step-n {
  flex: none; font-family: var(--mono); font-size: 0.74rem; font-weight: 500;
  color: var(--mute); width: 1.8em;
}
/* the drawn brick: instructions.js puts one in per step, in the step's color */
.lg-brick { flex: none; width: 44px; height: 30px; }
.lg-step-t { min-width: 0; flex: 1; }
.lg-step-t b { display: block; font-size: 0.9rem; font-weight: 600; letter-spacing: -0.01em; }
.lg-step-t i { display: block; font-style: normal; font-size: 0.74rem; color: var(--mute); margin-top: 0.1rem; }
/* the parts list, written by the JS from data-parts */
.lg-step-p {
  display: block; margin-top: 0.3rem; font-family: var(--mono);
  font-size: 0.6rem; letter-spacing: 0.04em; color: var(--dim);
}
.lg-step-go { flex: none; color: var(--mute); font-size: 0.9rem; }
.lg-step:hover .lg-step-go { color: var(--ink); }

/* a step ticked off: the booklet remembers it (localStorage) */
.lg-step.is-built { background: #f2faf2; }
.lg-step.is-built .lg-step-n::after {
  content: " ✓"; color: #3f8f5f; font-weight: 700;
}
.lg-tick {
  flex: none; width: 22px; height: 22px; cursor: pointer;
  border: 2px solid var(--ink); border-radius: 5px; background: #fff;
  display: grid; place-items: center; font-size: 0.7rem; line-height: 1;
}
.lg-tick[aria-pressed="true"] { background: #4fbf7f; }

/* ───────────── footer ───────────── */
.lg-bottom {
  position: relative; z-index: 2;
  display: flex; align-items: center; justify-content: space-between; gap: 0.6rem 1rem; flex-wrap: wrap;
  padding: 1.2rem clamp(1rem, 4vw, 2.6rem) calc(1.6rem + env(safe-area-inset-bottom, 0px));
  border-top: 2px solid var(--ink);
  font-family: var(--mono); font-size: 0.64rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--dim);
}
.lg-back:hover { color: var(--ink); }

@media (max-width: 760px) {
  .lg-hero { grid-template-columns: 1fr; }
  .lg-box { max-width: 320px; }
  /* the model goes above its progress panel rather than beside it: both are
     still there, because nothing on this site gets hidden on a phone */
  .lg-build-box { grid-template-columns: 1fr; }
  .lg-model { min-height: 240px; }
}
/* on a wide screen the model stays in view while you work down the steps,
   which is where the real booklet sits: open, next to the pile */
@media (min-width: 1040px) {
  .lg-build-box { align-items: start; }
  .lg-model { position: sticky; top: 1rem; }
}
@media (prefers-reduced-motion: reduce) {
  .lg-step, .lg-btn, .lg-pbar i { transition: none; }
  .lg-stack .lg-brick { animation: none; }
}