/* ============================================================
   System Builder
   ============================================================ */

.builder { padding: clamp(2.5rem, 6vw, 5rem) var(--gutter) 6rem; }
.builder__inner { max-width: var(--maxw); margin: 0 auto; }

.builder__intro { max-width: 760px; margin-bottom: 3rem; }
.builder__intro h1 {
  font-family: var(--font-display);
  font-variation-settings: 'wdth' 116, 'wght' 800;
  font-size: clamp(2.2rem, 5.5vw, 4.2rem);
  line-height: .98;
  letter-spacing: -.03em;
  margin: 0 0 1.2rem;
}
.builder__intro h1 em { font-style: normal; color: var(--amber); }
.builder__lede { color: var(--ink-soft); font-size: 1.05rem; line-height: 1.7; margin: 0; }

.builder__grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 2rem;
  align-items: start;
}

/* steps */
.bstep {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: 1.6rem 1.7rem 1.8rem;
  margin-bottom: 1.4rem;
}
.bstep__head { display: flex; gap: 1.1rem; margin-bottom: 1.4rem; }
.bstep__num {
  color: var(--amber);
  font-size: .8rem;
  letter-spacing: .14em;
  padding-top: .3rem;
}
.bstep__head h2 {
  font-family: var(--font-display);
  font-variation-settings: 'wdth' 108, 'wght' 700;
  font-size: 1.35rem;
  letter-spacing: -.02em;
  margin: 0 0 .35rem;
}
.bstep__head p { margin: 0; color: var(--ink-faint); font-size: .87rem; line-height: 1.6; }

/* loads */
.loads { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: .7rem; }
.load {
  display: flex;
  align-items: center;
  gap: .7rem;
  padding: .7rem .85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--void);
  cursor: pointer;
  transition: border-color .22s var(--ease), background .22s var(--ease);
}
.load.is-on { border-color: rgba(255,176,32,.5); background: rgba(255,176,32,.05); }
.load__icon { font-size: 1.1rem; flex: none; width: 1.6rem; text-align: center; }
.load__name { flex: 1; font-size: .86rem; color: var(--ink-soft); }
.load.is-on .load__name { color: var(--ink); }
.load__meta { display: flex; align-items: center; gap: .3rem; }
.load__meta input {
  width: 3.2rem;
  padding: .25rem .3rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: .74rem;
  text-align: right;
}
.load__unit { font-family: var(--font-mono); font-size: .62rem; color: var(--ink-faint); }
.loads__add {
  margin-top: .9rem;
  appearance: none; cursor: pointer;
  background: none;
  border: 1px dashed var(--line-bright);
  border-radius: var(--radius-lg);
  color: var(--ink-faint);
  font-family: var(--font-mono);
  font-size: .78rem;
  padding: .6rem 1rem;
  transition: color .22s var(--ease), border-color .22s var(--ease);
}
.loads__add:hover { color: var(--amber); border-color: var(--amber); }

/* params */
.params { display: flex; flex-wrap: wrap; gap: 1.6rem 2.2rem; }
.control__hint { font-size: .64rem; color: var(--ink-faint); margin: .45rem 0 0; letter-spacing: .04em; }

/* picks */
.picks { display: flex; flex-direction: column; gap: 1.2rem; }
.pick { }
.pick__label {
  display: flex; justify-content: space-between; align-items: baseline;
  font-family: var(--font-mono);
  font-size: .68rem; letter-spacing: .13em; text-transform: uppercase;
  color: var(--amber);
  margin-bottom: .5rem;
}
.pick__need { color: var(--ink-faint); letter-spacing: .04em; text-transform: none; }
.pick select { width: 100%; }
.pick__meta {
  display: flex; flex-wrap: wrap; gap: .4rem 1.4rem;
  margin-top: .5rem;
  font-family: var(--font-mono); font-size: .7rem; color: var(--ink-soft);
}
.pick__meta strong { color: var(--ink); font-weight: 500; }
.pick__warn { color: var(--alert); font-size: .74rem; margin-top: .4rem; }

/* bom */
.bom table { width: 100%; border-collapse: collapse; }
.bom th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: .62rem; letter-spacing: .13em; text-transform: uppercase;
  color: var(--ink-faint);
  padding: .4rem .6rem;
  border-bottom: 1px solid var(--line);
}
.bom td {
  padding: .55rem .6rem;
  border-bottom: 1px solid var(--line);
  font-size: .84rem;
  vertical-align: top;
}
.bom td.mono { font-size: .8rem; white-space: nowrap; }
.bom .bom__qty { color: var(--ink-faint); }
.bom .bom__req td { color: var(--ink-faint); font-style: italic; }
.bom tfoot td { border-bottom: 0; padding-top: .9rem; font-weight: 600; }
.bom a { color: var(--ink); text-decoration: none; border-bottom: 1px dotted var(--line-bright); }
.bom a:hover { color: var(--amber); border-color: var(--amber); }

.bom__actions { display: flex; align-items: center; gap: 1rem; margin-top: 1.2rem; }
.bom__share {
  appearance: none; cursor: pointer;
  padding: .7rem 1.6rem;
  background: var(--amber);
  border: 0; border-radius: 100px;
  color: var(--void);
  font-family: var(--font-mono); font-size: .78rem; font-weight: 600; letter-spacing: .04em;
  transition: transform .15s var(--ease), box-shadow .25s var(--ease);
}
.bom__share:hover { box-shadow: 0 0 22px rgba(255,176,32,.4); transform: translateY(-1px); }
.bom__shared { color: var(--verified); font-size: .76rem; }

/* summary rail */
.summary {
  position: sticky;
  top: 84px;
  border: 1px solid var(--line-bright);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: 1.3rem 1.35rem 1.4rem;
}
.summary__title {
  font-size: .68rem; letter-spacing: .15em; text-transform: uppercase;
  color: var(--amber); margin: 0 0 1rem; font-weight: 500;
}
.summary__rows { display: flex; flex-direction: column; gap: .55rem; }
.srow { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; }
.srow dt, .srow .k { font-size: .78rem; color: var(--ink-faint); }
.srow dd, .srow .v { margin: 0; font-family: var(--font-mono); font-size: .82rem; color: var(--ink); }
.summary__total {
  margin-top: 1.1rem; padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
}
.summary__total .big {
  font-size: 1.7rem; color: var(--amber-hot); letter-spacing: -.02em;
}
.summary__total .lbl { font-size: .64rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-faint); }
.summary__note {
  margin: 1.1rem 0 0;
  font-size: .7rem; line-height: 1.55; color: var(--ink-faint);
}

@media (max-width: 980px) {
  .builder__grid { grid-template-columns: 1fr; }
  .summary { position: static; }
}