/*
 * NorthForged Diesel — Kit Builder styles (Piece C).
 * Ported from the mockup's kit-builder CSS, remapped onto the theme's
 * --nfd-* tokens. Mockup class names (.kb-*, .opt, .seg) are kept so the
 * JS-rendered markup matches.
 */

/* ---------- section ---------- */
.kitbuilder { padding: 48px 0 72px; }
.kb-head { max-width: 860px; margin-bottom: 26px; }
.kb-head h1 { margin-bottom: 10px; }
.kb-head p { color: var(--nfd-muted); margin: 0; font-size: 1.02rem; }

/* ---------- step nav ---------- */
.kb-steps { list-style: none; display: flex; gap: 0; margin: 0 0 20px; padding: 0; }
.kb-steps li { flex: 1; }
.kb-steps button {
	width: 100%; background: none; border: 0; border-top: 3px solid var(--nfd-border);
	padding: 10px 6px 0; text-align: left; cursor: pointer;
	font-family: var(--nfd-font-head); font-size: 1.02rem; font-weight: 600;
	letter-spacing: 0.04em; text-transform: uppercase; color: var(--nfd-muted);
	display: flex; gap: 8px; align-items: center;
}
.kb-steps button .n {
	width: 24px; height: 24px; flex: none; border-radius: 999px;
	background: var(--nfd-panel); color: var(--nfd-muted);
	display: flex; align-items: center; justify-content: center;
	font-size: 0.84rem; font-family: var(--nfd-font-body); font-weight: 800;
}
.kb-steps li.cur button { border-top-color: var(--nfd-orange); color: var(--nfd-text); }
.kb-steps li.cur button .n { background: var(--nfd-orange); color: #fff; }
.kb-steps li.done button { color: var(--nfd-text); }
.kb-steps li.done button .n { background: #2e7d32; color: #fff; }
.kb-steps button[disabled] { cursor: not-allowed; opacity: 0.5; }

/* ---------- layout ---------- */
.kb-layout { display: grid; grid-template-columns: 1fr 330px; gap: 22px; align-items: start; }
.kb-panel { background: var(--nfd-charcoal); border: 1px solid var(--nfd-border); border-radius: 14px; padding: 24px; }
.kb-panel h3 { font-size: 1.7rem; margin-bottom: 4px; }
.kb-panel .kb-sub { color: var(--nfd-muted); margin: 0 0 16px; }

/* ---------- step fields ---------- */
.kb-fields { display: flex; gap: 14px; flex-wrap: wrap; }
.kb-fields .field { flex: 1; min-width: 150px; }
.field label {
	display: block; font-size: 0.82rem; font-weight: 700; letter-spacing: 0.08em;
	text-transform: uppercase; color: var(--nfd-muted); margin-bottom: 6px;
}
.field select {
	width: 100%; background: var(--nfd-panel); color: var(--nfd-text);
	border: 1px solid var(--nfd-border); border-radius: 6px;
	padding: 13px 14px; font-size: 0.95rem; font-family: var(--nfd-font-body);
}

/* ---------- groups / chips ---------- */
.kb-group {
	font-size: 0.75rem; font-weight: 800; letter-spacing: 0.14em; text-transform: uppercase;
	color: var(--nfd-muted); margin: 22px 0 9px;
}
.kb-group:first-of-type { margin-top: 2px; }
.kb-chips { display: flex; gap: 7px; flex-wrap: wrap; }
.kb-chips button {
	border: 1px solid var(--nfd-border); background: var(--nfd-panel); border-radius: 999px;
	padding: 6px 13px; font-weight: 600; font-size: 0.84rem; color: var(--nfd-text); cursor: pointer;
}
.kb-chips button.on { background: var(--nfd-orange); color: #fff; border-color: var(--nfd-orange); }
.kb-chips button[disabled] { opacity: 0.4; cursor: not-allowed; }

/* ---------- option cards ---------- */
.opt {
	display: flex; gap: 13px; align-items: flex-start; width: 100%; text-align: left;
	background: var(--nfd-panel); border: 1.5px solid var(--nfd-border); border-radius: 10px;
	padding: 13px 14px; margin-bottom: 9px; cursor: pointer; color: var(--nfd-text);
	transition: border-color 0.12s ease;
}
.opt:hover { border-color: var(--nfd-muted); }
.opt.sel { border-color: var(--nfd-orange); background: var(--nfd-orange-soft); }
.opt.dis { opacity: 0.45; cursor: not-allowed; }
.opt img {
	width: 70px; height: 52px; object-fit: contain; object-position: center;
	background: #fff; border-radius: 6px; flex: none;
}
.opt .oi { flex: 1; min-width: 0; }
.opt .on2 { font-weight: 700; font-size: 0.94rem; line-height: 1.3; display: block; }
.opt .od { color: var(--nfd-muted); font-size: 0.81rem; margin-top: 2px; display: block; }
.opt .op { font-weight: 800; font-size: 1.02rem; font-variant-numeric: tabular-nums; white-space: nowrap; }
.opt .op.free { color: #7bc47f; }
.opt .tick {
	width: 21px; height: 21px; flex: none; border-radius: 999px; border: 2px solid var(--nfd-border);
	margin-top: 2px; display: flex; align-items: center; justify-content: center;
	color: #fff; font-size: 0.75rem; font-weight: 800;
}
.opt.sel .tick { background: var(--nfd-orange); border-color: var(--nfd-orange); }

/* ---------- segmented control (muffler) ---------- */
.seg { display: inline-flex; border: 1px solid var(--nfd-border); border-radius: 8px; overflow: hidden; }
.seg button {
	border: 0; background: var(--nfd-panel); padding: 9px 15px;
	font-weight: 700; font-size: 0.88rem; color: var(--nfd-text); cursor: pointer;
}
.seg button.on { background: var(--nfd-orange); color: #fff; }
.seg button[disabled] { opacity: 0.45; cursor: not-allowed; }

/* ---------- nav row ---------- */
.kb-nav {
	display: flex; align-items: center; gap: 12px; margin-top: 22px;
	border-top: 1px solid var(--nfd-border); padding-top: 18px; flex-wrap: wrap;
}
.kb-nav .run { margin-left: auto; text-align: right; }
.kb-nav .run span {
	display: block; font-size: 0.72rem; font-weight: 800; letter-spacing: 0.1em;
	text-transform: uppercase; color: var(--nfd-muted);
}
.kb-nav .run b { font-size: 1.25rem; font-variant-numeric: tabular-nums; }

/* Button variants used by the builder (aliases onto the theme buttons) */
.btn-acc { background: var(--nfd-orange); color: #fff; }
.btn-acc:hover { background: var(--nfd-orange-dark); color: #fff; }
.btn-line {
	background: transparent; border: 2px solid var(--nfd-border); color: var(--nfd-text);
}
.btn-line:hover { border-color: var(--nfd-orange); background: var(--nfd-orange-soft); color: var(--nfd-text); transform: none; }
.kb-nav .btn[disabled], #kbAdd[disabled] { opacity: 0.45; cursor: not-allowed; }

/* ---------- summary sidebar ---------- */
.kb-sum {
	background: var(--nfd-charcoal); border: 1px solid var(--nfd-border);
	color: var(--nfd-text); border-radius: 14px; padding: 20px;
	position: sticky; top: 118px;
}
.kb-sum h3 { font-size: 1.35rem; color: var(--nfd-text); }
.kb-sum .truckline { color: var(--nfd-muted); font-size: 0.84rem; margin: 2px 0 12px; }
.kb-sum .truckline b { color: var(--nfd-text); }
.kb-sum ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.kb-sum li { display: flex; justify-content: space-between; gap: 12px; font-size: 0.84rem; }
.kb-sum li span:first-child { color: var(--nfd-muted); }
.kb-sum li b { font-variant-numeric: tabular-nums; white-space: nowrap; }
.kb-sum .none { color: var(--nfd-muted); font-size: 0.84rem; margin: 0; }
.kb-sum .tots {
	border-top: 1px solid var(--nfd-border); margin-top: 14px; padding-top: 12px;
	display: flex; flex-direction: column; gap: 6px;
}
.kb-sum .tots .row { display: flex; justify-content: space-between; font-size: 0.88rem; }
.kb-sum .tots .row.disc { color: var(--nfd-orange); }
.kb-sum .tots .row.grand {
	font-size: 1.18rem; font-weight: 800;
	border-top: 1px dashed var(--nfd-border); padding-top: 9px; margin-top: 3px;
}
.kb-sum .chg { margin-top: 14px; width: 100%; justify-content: center; }

/* ---------- review ---------- */
.kb-rev { border-top: 1px solid var(--nfd-border); margin-top: 6px; }
.kb-rev .r {
	display: flex; justify-content: space-between; gap: 16px;
	padding: 10px 0; border-bottom: 1px solid var(--nfd-border); font-size: 0.9rem;
}
.kb-rev .r .rl { color: var(--nfd-muted); }
.kb-rev .r.skip { color: var(--nfd-muted); font-style: italic; }
.kb-rev .r b { font-variant-numeric: tabular-nums; white-space: nowrap; }
.kb-tots { margin-top: 14px; display: flex; flex-direction: column; gap: 6px; font-size: 0.94rem; }
.kb-tots .row { display: flex; justify-content: space-between; }
.kb-tots .disc { color: var(--nfd-orange); font-weight: 700; }
.kb-tots .grand {
	font-size: 1.3rem; font-weight: 800;
	border-top: 1px dashed var(--nfd-border); padding-top: 10px; margin-top: 4px;
}
.kb-check { display: flex; gap: 9px; align-items: flex-start; font-size: 0.88rem; color: var(--nfd-muted); margin-top: 9px; }
.kb-check .ck { color: #7bc47f; font-weight: 800; flex: none; }
.kb-err {
	background: rgba(200, 40, 40, 0.14); border: 1px solid #c0392b; color: #f0a9a0;
	border-radius: 8px; padding: 10px 14px; margin: 16px 0 0; font-size: 0.9rem;
}

/* ---------- bundle line in cart ---------- */
.nfd-bundle-name { font-weight: 700; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
	.kb-layout { grid-template-columns: 1fr; }
	.kb-sum { position: static; }
}
@media (max-width: 640px) {
	.kb-steps button { font-size: 0.78rem; flex-direction: column; align-items: flex-start; gap: 5px; }
	.kb-panel { padding: 18px; }
}