:root{
  --navy:#0b1f3a; --navy2:#12305c; --blue:#1763d6; --blue-d:#0f4aa8;
  --ink:#12203a; --muted:#5b6b82; --line:#e5e9f0; --bg:#f6f8fb; --card:#fff;
  --ok:#0f9d58; --warn:#c9720b; --radius:12px; --shadow:0 1px 3px rgba(16,32,60,.08),0 8px 24px rgba(16,32,60,.06);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.25;color:var(--ink);margin:.2em 0 .5em}
h1{font-size:clamp(1.5rem,3.5vw,2.1rem)}
img{max-width:100%;height:auto}
.wrap{max-width:1080px;margin:0 auto;padding:0 18px}
.block{padding:28px 18px}
.muted{color:var(--muted)}
.small{font-size:.86rem}
.skip{position:absolute;left:-999px}
.skip:focus{left:8px;top:8px;background:#fff;padding:8px;z-index:99}

/* Buttons — solid, filled */
.btn{display:inline-block;padding:11px 18px;border-radius:10px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:.15s;text-align:center}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-d)}
.btn-sm{padding:8px 14px;font-size:.9rem;background:var(--navy);color:#fff}
.btn-sm:hover{background:var(--navy2)}

/* Header */
.site-head{background:var(--navy);color:#fff;position:sticky;top:0;z-index:50}
.head-in{display:flex;align-items:center;gap:16px;padding:12px 18px}
.brand{display:flex;align-items:center;gap:9px;color:#fff;font-size:1.25rem}
.brand:hover{text-decoration:none}
.brand-mark{font-size:1.4rem}
.brand-txt strong{font-weight:800}
.brand-txt small{opacity:.7;font-weight:400}
.head-search{flex:1;display:flex;max-width:560px;background:#fff;border-radius:10px;overflow:hidden}
.head-search input{flex:1;border:0;padding:11px 14px;font-size:.95rem;outline:none;min-width:0}
.head-search button{border:0;background:var(--blue);color:#fff;padding:0 16px;cursor:pointer;font-size:1rem}
.main-nav{display:flex;gap:6px}
.main-nav a{color:#dfe7f5;padding:8px 12px;border-radius:8px;font-size:.92rem}
.main-nav a:hover{background:rgba(255,255,255,.1);text-decoration:none}
.nav-toggle{display:none;background:none;border:0;color:#fff;font-size:1.4rem;cursor:pointer}

.preview-bar{background:#fff6e6;color:#7a4d00;border-bottom:1px solid #f0dcae;text-align:center;padding:8px 14px;font-size:.88rem}

/* Hero */
.hero{background:linear-gradient(160deg,var(--navy),var(--navy2));color:#fff;padding:48px 0 40px}
.hero h1{color:#fff;max-width:16em}
.hero .lead{max-width:44em;color:#d7e2f4;font-size:1.08rem}
.hero-search{display:flex;gap:8px;max-width:640px;margin:22px 0 8px}
.hero-search input{flex:1;border:0;border-radius:12px;padding:16px 18px;font-size:1.05rem;min-width:0}
.hero-search button{border:0;border-radius:12px;background:var(--blue);color:#fff;font-weight:700;padding:0 26px;font-size:1.05rem;cursor:pointer}
.hero-search button:hover{background:var(--blue-d)}
.hero-hint{color:#9fb4d4;font-size:.9rem}

/* Category grid */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:14px}
.cat-tile{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;display:flex;flex-direction:column;gap:6px;box-shadow:var(--shadow);transition:.15s}
.cat-tile:hover{transform:translateY(-2px);text-decoration:none;border-color:#cdd8ea}
.ct-icon{font-size:1.7rem}
.ct-name{font-weight:700;color:var(--ink)}
.ct-n{font-size:.82rem;color:var(--muted)}

/* How */
.how-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}
.how-grid>div{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.h-num{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--navy);color:#fff;font-weight:700;margin-bottom:8px}

/* Breadcrumbs */
.crumbs{display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:.85rem;color:var(--muted);padding:16px 0}
.crumbs span.cur{color:var(--ink)}

/* Part page */
.part{padding-bottom:40px}
.part-top{display:grid;grid-template-columns:240px 1fr;gap:26px;align-items:start;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:var(--shadow)}
.part-media{display:grid;place-items:center;background:#f2f5fa;border-radius:12px;aspect-ratio:1;overflow:hidden}
.ph-img{font-size:4rem;opacity:.5}
.brand-chip{display:inline-block;background:#eef3fb;color:var(--navy2);font-weight:700;font-size:.82rem;padding:4px 10px;border-radius:6px}
.codeline{color:var(--muted);margin:6px 0 16px}
.codeline strong{color:var(--ink);font-family:ui-monospace,monospace;font-size:1.05rem}
.copy{border:1px solid var(--line);background:#fff;border-radius:6px;cursor:pointer;padding:1px 7px;margin-left:4px}
.bestbox{display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;background:#f3f8ff;border:1px solid #d7e6fb;border-radius:12px;padding:16px 18px}
.bestbox.nostock{background:#fbfbfc;border-color:var(--line);color:var(--muted)}
.best-label{display:block;font-size:.8rem;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
.best-price{font-size:1.7rem;font-weight:800;color:var(--navy)}
.best-shop{color:var(--muted);margin-left:6px}

.offers,.history,.oe,.equiv,.fitment{margin-top:28px}
.offer-table{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--card)}
.offer-row{display:grid;grid-template-columns:1.4fr 1fr 1fr auto;gap:12px;align-items:center;padding:14px 16px;border-top:1px solid var(--line)}
.offer-row:first-child{border-top:0}
.o-shop{font-weight:700}
.o-stock{font-size:.86rem;color:var(--ok)}
.o-price{font-weight:800;font-size:1.1rem;color:var(--navy)}
.o-price s{font-weight:400;font-size:.85rem;color:var(--muted);margin-left:6px}

.spark{width:100%;height:120px;color:var(--blue)}
.hist-legend{display:flex;justify-content:space-between;color:var(--muted);font-size:.85rem}

.chips,.cards,.fit-grid{display:flex;flex-wrap:wrap;gap:8px}
.chip{background:#eef3fb;border:1px solid #dbe6f7;border-radius:8px;padding:6px 11px;font-family:ui-monospace,monospace;font-size:.9rem}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px;display:flex;flex-direction:column;gap:3px}
.card:hover{border-color:#cdd8ea;text-decoration:none}
.c-brand{font-size:.78rem;color:var(--muted);font-weight:700}
.c-code{font-family:ui-monospace,monospace;font-weight:700}
.c-name{font-size:.88rem;color:var(--ink)}
.fit{background:#f2f5fa;border:1px solid var(--line);border-radius:8px;padding:8px 12px;font-size:.9rem}

/* Part cards grids */
.pcards{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px}
.pcard{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:15px;display:flex;flex-direction:column;gap:4px;box-shadow:var(--shadow)}
.pcard:hover{border-color:#cdd8ea;transform:translateY(-2px);text-decoration:none}
.pc-brand{font-size:.78rem;font-weight:700;color:var(--muted)}
.pc-code{font-family:ui-monospace,monospace;font-weight:700;color:var(--ink)}
.pc-name{font-size:.9rem}
.pc-price{margin-top:4px;font-weight:700;color:var(--navy)}

.make-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.brand-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:10px}
.brand-tile{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:14px;display:flex;flex-direction:column;gap:2px}
.brand-tile:hover{border-color:#cdd8ea;text-decoration:none;transform:translateY(-2px)}
.bt-name{font-weight:700;color:var(--ink)}
.bt-n{font-size:.8rem;color:var(--muted)}
a.brand-chip:hover{text-decoration:none;background:#e3ecfa}
.make-tile{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:14px;font-weight:600}
.shop-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.shop-tile{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:16px;display:flex;flex-direction:column;gap:4px}

.empty{background:var(--card);border:1px dashed var(--line);border-radius:12px;padding:26px;text-align:center}
.prose{max-width:44em}
.prose h2{margin-top:1.4em}

/* Footer */
.site-foot{background:var(--navy);color:#c6d4ea;margin-top:40px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px;padding:36px 18px 20px}
.foot-grid h4{color:#fff}
.foot-grid a{display:block;color:#c6d4ea;padding:3px 0}
.foot-legal{border-top:1px solid rgba(255,255,255,.12);padding:16px 18px;font-size:.82rem;color:#8ea3c4}

@media(max-width:760px){
  .main-nav{display:none;position:absolute;top:100%;left:0;right:0;background:var(--navy);flex-direction:column;padding:8px}
  body.nav-open .main-nav{display:flex}
  .nav-toggle{display:block}
  .head-in{flex-wrap:wrap}
  .head-search{order:3;flex-basis:100%;max-width:none}
  .part-top{grid-template-columns:1fr}
  .part-media{max-width:200px}
  .offer-row{grid-template-columns:1fr auto;row-gap:4px}
  .o-stock{grid-column:1}
  .foot-grid{grid-template-columns:1fr 1fr}
}