/* ============================================================
   DUPLOS PNEUS — design system
   Identity: charcoal + amber, bold automotive feel
   ============================================================ */
:root{
  --brand:#f5a623;            /* amber */
  --brand-dark:#d4880c;
  --ink:#14171c;             /* near-black text */
  --muted:#6d7681;
  --bg:#f6f7f9;
  --card:#ffffff;
  --line:#e6e9ee;
  --dark:#14171c;            /* charcoal for header topbar/footer/hero */
  --dark-2:#1d2128;
  --soft:#fdf3e0;            /* soft amber tint */
  --radius:18px;
  --shadow:0 16px 40px rgba(20,23,28,.10);
  --max:1180px;
}
[data-theme="dark"]{
  --ink:#eef1f5;--muted:#9aa3b0;--bg:#0f1216;--card:#171b21;--line:#262c35;
  --soft:#241d10;--dark:#0b0d10;--dark-2:#171b21;--shadow:0 16px 40px rgba(0,0,0,.5);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;background:var(--bg);color:var(--ink);line-height:1.6;transition:background .3s,color .3s}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{width:min(calc(100% - 32px),var(--max));margin:auto}
.section{padding:76px 0}
.section-sm{padding:52px 0}
h1,h2,h3,h4{line-height:1.12;margin:0 0 15px;font-weight:800}
h1{font-size:clamp(2.2rem,5.5vw,4rem);letter-spacing:-.03em}
h2{font-size:clamp(1.8rem,4vw,2.8rem);letter-spacing:-.02em}
h3{font-size:1.2rem}
p{margin:0 0 16px;color:var(--muted)}
.eyebrow{color:var(--brand-dark);font-size:.78rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase}
[data-theme="dark"] .eyebrow{color:var(--brand)}
.lead{font-size:1.08rem;max-width:60ch}
.badge{display:inline-flex;align-items:center;gap:8px;padding:8px 15px;border-radius:999px;background:var(--soft);color:var(--brand-dark);font-size:.85rem;font-weight:800}
[data-theme="dark"] .badge{color:var(--brand)}

/* buttons */
.btn-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:24px}
.btn{display:inline-flex;justify-content:center;align-items:center;min-height:48px;padding:0 22px;border-radius:12px;border:1px solid transparent;font-weight:700;cursor:pointer;transition:.2s ease;font-size:.95rem}
.btn-primary{background:var(--brand);color:#14171c;box-shadow:0 8px 20px rgba(245,166,35,.28)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px)}
.btn-secondary{background:var(--card);border-color:var(--line);color:var(--ink)}
.btn-secondary:hover{border-color:var(--brand);color:var(--brand-dark)}
[data-theme="dark"] .btn-secondary:hover{color:var(--brand)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.25);color:#fff}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}

/* header */
.site-header{position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.topbar{background:var(--dark);color:#cfd6df;font-size:.9rem}
.topbar .container{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;padding:9px 0}
.topbar a{color:#cfd6df}
.topbar a:hover{color:var(--brand)}
.nav{min-height:76px;display:flex;justify-content:space-between;align-items:center;gap:20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:900;font-size:1.5rem;letter-spacing:-.02em}
.brand .logo-mark{width:34px;height:34px;border-radius:9px;background:var(--brand);color:#14171c;display:grid;place-items:center;font-weight:900;font-size:1.1rem}
.brand b{color:var(--brand)}
.nav-links{display:flex;align-items:center;gap:20px}
.nav-links a{font-weight:700;color:var(--ink)}
.nav-links a.plain:hover,.nav-links a.plain.active{color:var(--brand-dark)}
[data-theme="dark"] .nav-links a.plain:hover,[data-theme="dark"] .nav-links a.plain.active{color:var(--brand)}
.tools{display:flex;align-items:center;gap:8px}
.icon-btn{width:44px;height:44px;border-radius:11px;background:var(--card);border:1px solid var(--line);color:var(--ink);cursor:pointer;font-weight:700;font-size:.9rem}
.icon-btn:hover{border-color:var(--brand);color:var(--brand-dark)}
.menu-toggle{display:none}

/* hero */
.hero{padding:44px 0 60px}
.hero-wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.hero-main{border-radius:26px;overflow:hidden;border:1px solid var(--line);background:linear-gradient(135deg,var(--dark),var(--dark-2));box-shadow:var(--shadow);aspect-ratio:4/3;display:grid;place-items:center}
.hero-main img{width:100%;height:100%;object-fit:cover}
.hero-main .fallback{color:#4a525d;font-size:5rem}
.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:28px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px}
.stat strong{display:block;font-size:1.3rem}
.stat span{font-size:.85rem;color:var(--muted)}

/* video banner */
.video-band{margin:8px 0}
.video-box{position:relative;border-radius:22px;overflow:hidden;background:linear-gradient(120deg,#14171c,#1d2128);padding:40px 26px;display:flex;flex-direction:column;align-items:center;text-align:center;border:1px solid var(--line)}
.video-box h2{color:#fff;max-width:640px}
.video-box p{color:#b9c0ca;max-width:560px}
.video-box .yt{width:min(680px,100%);aspect-ratio:16/9;border:none;border-radius:14px;margin-top:18px;box-shadow:0 12px 34px rgba(0,0,0,.4)}

/* section heads */
.section-head{max-width:720px;margin-bottom:34px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}

/* grids */
.grid-2,.grid-3,.grid-4{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.category-card{display:flex;flex-direction:column;height:100%;transition:transform .22s,box-shadow .22s}
.category-card:hover{transform:translateY(-5px);box-shadow:0 22px 50px rgba(20,23,28,.16)}
.category-card .media{aspect-ratio:16/10;background:var(--soft);overflow:hidden}
.category-card .media img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.category-card:hover .media img{transform:scale(1.05)}
.category-card .body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}

.product-card{display:flex;flex-direction:column;height:100%;transition:transform .22s,box-shadow .22s,border-color .22s}
.product-card:hover{transform:translateY(-6px);box-shadow:0 22px 50px rgba(20,23,28,.16);border-color:var(--brand)}
.product-card .media{aspect-ratio:1/1;background:#fff;overflow:hidden;display:grid;place-items:center}
.product-card .media img{width:100%;height:100%;object-fit:contain;padding:10px;transition:transform .3s}
.product-card:hover .media img{transform:scale(1.06)}
.product-card .body{padding:18px;display:flex;flex-direction:column;gap:10px;flex:1}
.product-card h3{font-size:1.02rem}
.product-card .summary{font-size:.9rem;flex:1;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.meta-row{display:flex;gap:8px;flex-wrap:wrap}
.meta-pill{display:inline-flex;padding:6px 11px;border-radius:999px;background:var(--soft);color:var(--brand-dark);font-size:.78rem;font-weight:700}
[data-theme="dark"] .meta-pill{color:var(--brand)}

/* split card */
.split-card{display:grid;grid-template-columns:1fr 1fr;align-items:stretch}
.split-card .content{padding:36px}
.split-card .visual{background:var(--soft)}
.split-card .visual img{width:100%;height:100%;object-fit:cover;min-height:280px}
.info-list{list-style:none;margin:12px 0 0;padding:0;display:grid;gap:10px}
.info-list li{display:flex;gap:10px;color:var(--muted)}
.info-list li:before{content:"✓";font-weight:900;color:var(--brand)}

/* icon cards */
.icon-card{padding:24px}
.icon-bubble{width:50px;height:50px;border-radius:13px;background:var(--soft);color:var(--brand-dark);display:grid;place-items:center;font-weight:900;margin-bottom:14px}
[data-theme="dark"] .icon-bubble{color:var(--brand)}

/* page hero */
.page-hero{padding:52px 0;background:linear-gradient(180deg,var(--soft),var(--bg));border-bottom:1px solid var(--line)}
.breadcrumb{color:var(--muted);font-size:.92rem;margin-bottom:12px}

/* filter bar */
.filter-bar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:26px}
.filter-btn{border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:999px;padding:10px 16px;font-weight:700;cursor:pointer;transition:.2s}
.filter-btn.active,.filter-btn:hover{background:var(--brand);border-color:var(--brand);color:#14171c}

/* product detail */
.product-detail{display:grid;grid-template-columns:1.05fr .95fr;gap:34px;align-items:start}
.gallery-main{aspect-ratio:1/1;border-radius:22px;overflow:hidden;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow);display:grid;place-items:center}
.gallery-main img{width:100%;height:100%;object-fit:contain;padding:18px}
.thumb-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(84px,1fr));gap:10px;margin-top:12px}
.thumb-row button{border:1px solid var(--line);background:#fff;border-radius:13px;padding:6px;cursor:pointer;transition:.2s}
.thumb-row button:hover,.thumb-row button.active{border-color:var(--brand)}
.thumb-row img{aspect-ratio:1/1;width:100%;object-fit:contain;border-radius:9px}
.spec-table{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden}
.spec-table td{padding:13px 16px;border-bottom:1px solid var(--line)}
.spec-table tr:last-child td{border-bottom:0}
.spec-table td:first-child{font-weight:800;width:40%}

/* contact */
.contact-block{display:grid;grid-template-columns:.9fr 1.1fr;gap:28px;align-items:start}
.contact-items{display:grid;gap:14px;margin-top:16px}
.contact-item{display:flex;gap:14px;padding:16px;background:var(--card);border:1px solid var(--line);border-radius:14px}
.contact-item strong{display:block}
.contact-item a{color:var(--brand-dark)}
[data-theme="dark"] .contact-item a{color:var(--brand)}
.form-card{padding:26px}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.form-group{display:flex;flex-direction:column;gap:7px}
label{font-weight:700;font-size:.92rem}
input,select,textarea{width:100%;padding:13px 15px;border:1px solid var(--line);border-radius:12px;background:var(--card);color:var(--ink);font:inherit}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand)}
textarea{min-height:130px;resize:vertical}
.form-status{font-weight:700;min-height:1.2em;margin-top:10px}

/* cta band */
.cta{border-radius:24px;background:linear-gradient(135deg,#14171c,#232a33);color:#fff;padding:40px}
.cta h2{color:#fff}
.cta p{color:rgba(255,255,255,.8)}
.cta .eyebrow{color:var(--brand)}

/* faq */
.faq-item{border:1px solid var(--line);border-radius:14px;margin-bottom:12px;overflow:hidden;background:var(--card)}
.faq-q{padding:16px 20px;font-weight:700;cursor:pointer;display:flex;justify-content:space-between;gap:12px;align-items:center;font-size:.96rem}
.faq-q:hover{color:var(--brand-dark)}
[data-theme="dark"] .faq-q:hover{color:var(--brand)}
.faq-a{max-height:0;overflow:hidden;color:var(--muted);padding:0 20px;transition:max-height .3s,padding .3s}
.faq-item.open .faq-a{max-height:320px;padding:0 20px 16px}
.faq-item.open .chev{transform:rotate(180deg)}
.chev{transition:transform .3s;flex-shrink:0;color:var(--brand)}

/* footer */
.footer{background:var(--dark);color:#cfd6df;margin-top:70px}
.footer-main{display:grid;grid-template-columns:1.3fr .7fr .8fr 1fr;gap:28px;padding:50px 0 28px}
.footer p,.footer a{color:#aeb8c3}
.footer a:hover{color:var(--brand)}
.footer h4{color:#fff;margin-bottom:12px}
.footer ul{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.footer .brand{color:#fff;margin-bottom:14px}
.footer-bottom{padding:16px 0 26px;border-top:1px solid rgba(255,255,255,.08);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.9rem}
.footer-social{display:flex;gap:14px}
.footer-social a{font-weight:700}

/* responsive */
@media(max-width:1024px){
  .hero-wrap,.grid-4,.grid-3,.grid-2,.split-card,.footer-main,.product-detail,.contact-block{grid-template-columns:1fr 1fr}
  .grid-4{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:760px){
  .menu-toggle{display:grid;place-items:center}
  .nav-links{position:absolute;left:16px;right:16px;top:calc(100% + 8px);display:none;flex-direction:column;align-items:stretch;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:14px;box-shadow:var(--shadow);z-index:40}
  .nav-links.open{display:flex}
  .hero-wrap,.grid-4,.grid-3,.grid-2,.split-card,.footer-main,.product-detail,.contact-block,.form-grid{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr 1fr}
  .split-card .visual img{min-height:220px}
}

/* ============================================================
   LOGO
   ============================================================ */
.brand{display:inline-flex;align-items:center;gap:0;color:var(--ink)}
.brand .logo{height:46px;width:auto;display:block;color:var(--ink)}
.footer .brand .logo{color:#fff;height:48px}
@media(max-width:760px){.brand .logo{height:40px}}

/* ============================================================
   RESPONSIVE SPEC TABLE
   Desktop: 2-column table. Mobile: stacked label/value rows.
   ============================================================ */
.spec-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
.spec-table{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden;font-size:.95rem}
.spec-table th{text-align:left;background:var(--soft);color:var(--brand-dark);font-weight:800;font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;padding:12px 16px}
[data-theme="dark"] .spec-table th{color:var(--brand)}
.spec-table td{padding:13px 16px;border-top:1px solid var(--line);vertical-align:top}
.spec-table tbody tr:nth-child(even){background:color-mix(in srgb,var(--soft) 45%,transparent)}
.spec-table td:first-child{font-weight:700;width:42%;color:var(--ink)}
.spec-table td:last-child{color:var(--muted)}

@media(max-width:560px){
  .spec-table,.spec-table tbody,.spec-table tr,.spec-table td{display:block;width:100%}
  .spec-table thead{display:none}
  .spec-table{border-radius:14px}
  .spec-table tr{border-top:1px solid var(--line);padding:4px 0}
  .spec-table tr:first-child{border-top:0}
  .spec-table tbody tr:nth-child(even){background:transparent}
  .spec-table td{border:0;padding:6px 16px}
  .spec-table td:first-child{width:100%;font-size:.74rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);font-weight:800;padding-bottom:0}
  .spec-table td:last-child{font-size:1rem;font-weight:600;color:var(--ink);padding-top:2px;padding-bottom:12px}
}

/* gallery thumbs scroll on mobile */
@media(max-width:560px){
  .thumb-row{grid-template-columns:repeat(auto-fit,minmax(66px,1fr));gap:8px}
}