/* Troubleshooter — the live air-system schematic is the signature element. */
.sectionhead { margin: 6px 0 10px; font-size: 1.15rem; }
.tablewrap { overflow-x: auto; }

/* Starter panel */
.engage-row { display: flex; gap: 10px; align-items: center; margin-top: 12px; flex-wrap: wrap; }
.summaryline { display: flex; gap: 8px; align-items: center; margin: 12px 0 0; font-size: 0.9rem; color: var(--muted); }
.summaryline .i { color: var(--line); }
.summaryline.set { color: var(--ink); }
.summaryline.set .i { color: var(--green); }
.summaryline .btn { margin-left: auto; }
@media (max-width: 560px) { .starter .grid2 { grid-template-columns: 1fr; } }

/* Symptom grid */
.symgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 10px; }
.sym { --c: var(--brand); display: grid; grid-template-columns: auto 1fr; grid-template-rows: auto auto; column-gap: 14px; align-items: center; text-align: left;
  background: linear-gradient(135deg, color-mix(in srgb, var(--c) 9%, var(--surface)) 0%, var(--surface) 55%); border: 1.5px solid color-mix(in srgb, var(--c) 28%, var(--line)); border-radius: 18px; padding: 14px; cursor: pointer; font: inherit; color: var(--ink); min-height: 88px; box-shadow: var(--shadow); transition: border-color .15s, transform .12s, box-shadow .15s; }
.sym:hover { border-color: var(--c); transform: translateY(-2px); box-shadow: 0 14px 28px -16px var(--c); }
.sym:active { transform: scale(.99); }
.sym:nth-child(9n+1) { --c: var(--yellow); } .sym:nth-child(9n+2) { --c: var(--orange); } .sym:nth-child(9n+3) { --c: var(--violet); }
.sym:nth-child(9n+4) { --c: var(--blue); } .sym:nth-child(9n+5) { --c: var(--red); } .sym:nth-child(9n+6) { --c: var(--pink); }
.sym:nth-child(9n+7) { --c: var(--cyan); } .sym:nth-child(9n+8) { --c: var(--teal); } .sym:nth-child(9n+9) { --c: var(--green); }
.sym .symicon { --c: inherit !important; --ci: #fff !important; }
.sym:nth-child(9n+1) .symicon { --ci: #2a1d00 !important; }
.symicon { grid-row: 1 / span 2; width: 54px; height: 54px; border-radius: 16px; }
.symicon .i { width: 28px; height: 28px; }
.symtxt strong { display: block; font: 700 1.02rem var(--display); }
.symtxt small { display: block; color: var(--muted); font-size: 0.84rem; margin-top: 2px; line-height: 1.3; }
.symmeta { justify-self: start; margin-top: 4px; font-size: 0.72rem; font-weight: 800; color: color-mix(in srgb, var(--c) 70%, var(--ink)); background: color-mix(in srgb, var(--c) 14%, var(--surface)); padding: 2px 8px; border-radius: 999px; }

/* Check */
.check-layout, .result-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 14px; align-items: start; }
@media (max-width: 820px) { .check-layout, .result-grid { grid-template-columns: 1fr; } .result-grid .schematic-wrap { order: -1; } }
.crumb { display: flex; gap: 8px; align-items: center; margin: 0 0 10px; font: 700 0.9rem var(--display); color: var(--cta); }
.stepper { display: flex; gap: 6px; list-style: none; padding: 0; margin: 0 0 6px; }
.stepper li { flex: 1; height: 9px; border-radius: 999px; background: var(--line); }
.stepper li.done { background: linear-gradient(90deg, var(--teal), var(--green)); }
.stepper li.now { background: linear-gradient(90deg, var(--yellow), var(--orange)); box-shadow: 0 0 0 3px color-mix(in srgb, var(--orange) 25%, transparent); }
.q { font-size: clamp(1.25rem, 3.6vw, 1.55rem); line-height: 1.25; margin: 10px 0 14px; }
.how { display: flex; gap: 10px; background: color-mix(in srgb, var(--cyan) 9%, var(--surface)); border: 1px solid color-mix(in srgb, var(--cyan) 30%, var(--line)); border-left: 5px solid var(--cyan); border-radius: 14px; padding: 12px; }
.how .i { margin-top: 2px; color: var(--cyan); }
.how p { margin: 4px 0 0; color: var(--ink-2); }
.testing { display: flex; gap: 6px; align-items: center; margin: 12px 0 0; font-size: 0.88rem; color: var(--muted); }
.tagpill { display: inline-flex; gap: 6px; align-items: center; background: var(--brand); color: var(--brand-ink); font-size: 0.76rem; font-weight: 700; padding: 4px 10px; border-radius: 999px; }
.answers { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 18px; }
.ans { font-size: 1.25rem; min-height: 68px; color: #fff; border: 0; border-radius: 16px; box-shadow: inset 0 2px 0 rgba(255,255,255,.35), inset 0 -4px 0 rgba(0,0,0,.15); }
.ans.yes { background: linear-gradient(150deg, #4ee39a, var(--green) 55%, #0f9a52); box-shadow: inset 0 2px 0 rgba(255,255,255,.35), inset 0 -4px 0 rgba(0,0,0,.15), 0 12px 22px -12px var(--green); }
.ans.no { background: linear-gradient(150deg, #ff7a82, var(--red) 55%, #d10f1c); box-shadow: inset 0 2px 0 rgba(255,255,255,.35), inset 0 -4px 0 rgba(0,0,0,.15), 0 12px 22px -12px var(--red); }
.ans:hover { filter: brightness(1.05); color: #fff; }
.answers2 { display: flex; justify-content: space-between; margin-top: 8px; }

/* Schematic */
.schematic-wrap { margin: 0; }
.schematic-wrap figcaption { margin-top: 6px; }
.sch { width: 100%; height: auto; display: block; }
.sch .lbl { font: 600 15px var(--text); fill: var(--muted); }
.sch .lbl.s { font-size: 13px; }
.sch .lbl.strong { font: 800 17px var(--display); fill: var(--ink); }
.sch .body { fill: var(--surface-2); stroke: var(--ink-2); stroke-width: 2.5; transition: fill .25s, stroke .25s; }
.sch .comp { --k: var(--muted); }
.sch .k-tank { --k: var(--blue); } .sch .k-strainer { --k: var(--teal); } .sch .k-relay { --k: var(--violet); } .sch .k-lube { --k: var(--cyan); }
.sch .k-control { --k: var(--pink); } .sch .k-motor { --k: var(--orange); } .sch .k-exhaust { --k: var(--muted); } .sch .k-drive { --k: var(--pink); }
.sch .k-pinion { --k: var(--violet); } .sch .k-engine { --k: var(--blue); }
.sch .comp:not(.active):not(.fault) .body { fill: color-mix(in srgb, var(--k) 16%, var(--surface)); stroke: color-mix(in srgb, var(--k) 75%, var(--ink)); }
.sch .mark { fill: none; stroke: var(--ink-2); stroke-width: 2.5; }
.sch .mark-fill { fill: var(--cta); }
.sch .needle { stroke: var(--cta); stroke-width: 2.5; stroke-linecap: round; }
.sch .hole { fill: var(--surface); stroke: var(--ink-2); stroke-width: 2; }
.sch .gear { stroke-dasharray: 4 3; }
.sch .ring { stroke-dasharray: 6 4; }
.sch .puff { fill: none; stroke: var(--muted); stroke-width: 2; stroke-linecap: round; opacity: .6; }
.sch .air { fill: none; stroke: var(--muted); stroke-width: 6; stroke-linecap: round; }
.sch .air.flowing { stroke: var(--brand-strong); stroke-dasharray: 10 8; animation: flow 1s linear infinite; }
.sch .hoseline { fill: none; stroke: var(--ink-2); stroke-width: 9; stroke-linecap: round; }
.sch .ctl { fill: none; stroke: var(--muted); stroke-width: 2; stroke-dasharray: 5 4; }
.sch .comp.active .body, .sch .comp.active .hoseline { fill: var(--yellow); stroke: var(--ink); }
.sch .comp.active .hoseline { stroke: var(--brand-strong); }
.sch .comp.active .ctl { stroke: var(--brand-strong); stroke-width: 3; animation: flow 1s linear infinite; }
.sch .comp.active .lbl { fill: var(--ink); font-weight: 800; }
.sch .comp.active { animation: glow 1.6s ease-in-out infinite; }
.sch .comp.fault .body, .sch .comp.fault .hoseline { fill: var(--red); stroke: var(--ink); }
.sch .comp.fault .ctl { stroke: var(--cta); stroke-width: 3; }
.sch .comp.fault .lbl { fill: var(--cta); font-weight: 800; }
@keyframes flow { to { stroke-dashoffset: -18; } }
@keyframes glow { 50% { filter: drop-shadow(0 0 6px color-mix(in srgb, var(--brand) 85%, transparent)); } }

/* Result */
.result { --c: var(--line); border-top: 6px solid var(--c); }
.result.check { --c: var(--green); }
.result.repair { --c: var(--orange); }
.result.shop { --c: var(--red); }
.result .lvl-icon { --c: inherit !important; }
.level { display: flex; gap: 10px; align-items: center; margin-bottom: 12px; }
.level .lvl-icon { width: 46px; height: 46px; border-radius: 14px; }
.level strong { display: block; font-family: var(--display); }
.level .muted { display: block; }
.meter { margin-left: auto; display: flex; gap: 3px; }
.meter span { width: 10px; height: 22px; border-radius: 3px; background: var(--line); }
.meter span.on { background: var(--c, var(--ink)); }
.result h2 { font-size: 1.35rem; margin-bottom: 10px; }
.fix { padding-left: 22px; margin: 6px 0 0; }
.fix li { margin: 8px 0; }
.fix li::marker { font-weight: 800; color: var(--orange); }
.partcards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 10px; }
.partcard { --c: var(--violet); background: linear-gradient(180deg, color-mix(in srgb, var(--c) 10%, var(--surface)), var(--surface) 70%); border: 1.5px solid color-mix(in srgb, var(--c) 30%, var(--line)); border-top: 5px solid var(--c); border-radius: 14px; padding: 12px; display: grid; gap: 4px; }
.partcard:nth-child(4n+2) { --c: var(--blue); } .partcard:nth-child(4n+3) { --c: var(--teal); } .partcard:nth-child(4n+4) { --c: var(--orange); }
.partcard b { font: 800 1rem var(--display); letter-spacing: .01em; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; }
.actions .btn-cta { flex: 1 1 280px; }
.log { list-style: none; padding: 0; margin: 0; }
.log li { display: flex; gap: 8px; padding: 7px 0; border-top: 1px solid var(--line); font-size: 0.92rem; }
.log li.good .i { color: var(--green); } .log li.bad .i { color: var(--cta); } .log li.skip .i { color: var(--muted); }

/* Reference */
dl.ref { margin: 0; display: grid; gap: 2px; }
.refrow { display: grid; grid-template-columns: 200px 1fr; gap: 12px; padding: 9px 0; border-top: 1px solid var(--line); }
.refrow dt { font-weight: 800; font-family: var(--display); color: var(--brand-text); }
.refrow dd { margin: 0; color: var(--ink-2); }
@media (max-width: 560px) { .refrow { grid-template-columns: 1fr; gap: 2px; } }
.reftable { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.reftable th, .reftable td { text-align: left; padding: 9px 8px; border-top: 1px solid var(--line); }
.reftable thead th { border-top: 0; color: var(--muted); font-size: .78rem; }
.reftree { padding-left: 20px; margin: 0; }
.reftree li { margin: 8px 0; }
.safety ul { padding-left: 18px; }
@media print { .schematic-wrap { break-inside: avoid; } .actions, .answers, .answers2 { display: none !important; } }