/* ══════════════════════════════════════════
   TAIMA — PRODUCT PAGE STYLES
   Shares the design system defined in index4.html
══════════════════════════════════════════ */
:root {
  --red:          #d27600;
  --red-light:    #A82020;
  --red-dark:     #5C0F0F;
  --gold:         #9B6800;
  --gold-light:   #C48C1A;
  --gold-bright:  #D4AA30;
  --gold-pale:    #E8CB6A;
  --bg:           #2e3238;
  --bg-2:         #111111;
  --bg-3:         #181818;
  --bg-card:      #141414;
  --border:       rgba(155,104,0,0.28);
  --text:         #F0EDE8;
  --text-muted:   #888;
  --text-dim:     #555;
  --radius:       12px;
  --radius-lg:    20px;
  --shadow:       0 8px 40px rgba(0,0,0,0.7);
  --shadow-gold:  0 0 40px rgba(155,104,0,0.18);
  --transition:   0.4s cubic-bezier(0.25,0.46,0.45,0.94);
}

*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; font-size:16px; }
body {
  background:var(--bg);
  color:var(--text);
  font-family:'Segoe UI',system-ui,sans-serif;
  overflow-x:hidden;
  line-height:1.65;
}
img { display:block; max-width:100%; }
a { text-decoration:none; color:inherit; }
ul { list-style:none; }
button { cursor:pointer; border:none; background:none; font-family:inherit; }
section { box-shadow:0 1px 0 rgba(155,104,0,.2); }

::-webkit-scrollbar { width:6px; }
::-webkit-scrollbar-track { background:#0a0a0a; }
::-webkit-scrollbar-thumb { background:var(--gold); border-radius:3px; }

.serif { font-family:'Segoe UI',system-ui,sans-serif; }
.gold-text { color:var(--gold-bright); }
.muted { color:var(--text-muted); }

.overline {
  display:inline-flex; align-items:center; gap:10px;
  font-size:0.7rem; font-weight:700; letter-spacing:0.22em;
  text-transform:uppercase; color:var(--gold-bright); margin-bottom:1.2rem;
}
.overline::before, .overline::after {
  content:''; display:block; width:28px; height:1px;
  background:var(--gold-bright); opacity:0.6;
}

.badge{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;margin-bottom:20px}
.badge-a{background:rgba(155,104,0,0.12);border:1px solid rgba(155,104,0,0.25);color:var(--gold-bright)}
.dot{width:6px;height:6px;border-radius:50%;background:currentColor}

/* Buttons */
.btn-primary{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;background:var(--red);color:#fff;font-weight:700;border-radius:2px;transition:.3s;font-size:15px}
.btn-primary:hover{background:var(--red-light);transform:translateY(-2px);box-shadow:0 12px 32px rgba(139,26,26,.4)}
.btn-secondary{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;background:rgba(155,104,0,.1);border:1px solid rgba(155,104,0,.3);color:var(--gold-bright);font-weight:700;border-radius:2px;transition:.3s;font-size:15px}
.btn-secondary:hover{background:rgba(155,104,0,.2);transform:translateY(-2px)}

/* Reveal */
.reveal{opacity:0;transform:translateY(36px);transition:opacity .72s ease,transform .72s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ══════ NAV ══════ */
#nav{position:fixed;top:0;left:0;right:0;z-index:1000;transition:background .4s,box-shadow .4s}
#nav.scrolled{background:#2e3238;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);box-shadow:0 1px 0 rgba(155,104,0,.2)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:112px;max-width:1200px;margin:0 auto;padding:0 24px}
.nav-logo{font-size:22px;font-weight:900;letter-spacing:.02em;background:#fdfcfa;padding:8px 16px;border-radius:10px;display:inline-flex;align-items:center;box-shadow:0 4px 16px rgba(0,0,0,.3)}
.nav-logo img{height:64px;width:auto;display:block}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-links a{font-size:13px;font-weight:500;transition:color .2s;position:relative}
.nav-links a::after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:1px;background:var(--gold-bright);transition:width .3s}
.nav-links a:hover{color:var(--gold-bright)}
.nav-links a:hover::after{width:100%}
.btn-quote{padding:8px 20px;background:var(--red);color:#fff;font-size:13px;font-weight:700;border-radius:2px;transition:background .2s,transform .2s}
.btn-quote:hover{background:var(--red-light);transform:translateY(-1px)}
.nav-cta{display:flex;align-items:center;gap:10px}
.btn-lang{padding:7px 14px;background:transparent;border:1px solid rgba(240,237,232,0.3);color:var(--text);font-size:12px;font-weight:700;letter-spacing:.05em;border-radius:2px;transition:.2s}
.btn-lang:hover{border-color:var(--gold-bright);color:var(--gold-bright)}
.mobile-menu .btn-lang{margin:0 24px 10px;display:block;text-align:center;padding:12px}
.nav-mobile-btn{display:none;flex-direction:column;gap:5px;padding:4px}
.nav-mobile-btn span{width:22px;height:2px;background:var(--text);border-radius:1px;transition:.3s}
.mobile-menu{display:none;position:fixed;inset:0;z-index:999;background:rgba(8,8,8,.98);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);padding-top:80px;flex-direction:column;gap:0}
.mobile-menu a{display:block;padding:18px 24px;font-size:20px;font-weight:700;color:var(--text-muted);border-bottom:1px solid var(--bg-3);transition:color .2s}
.mobile-menu a:hover{color:var(--gold-bright)}
.mobile-menu .btn-quote{margin:24px;display:block;text-align:center;padding:14px}
@media(max-width:900px){
  .nav-links,.nav-cta{display:none}
  .nav-mobile-btn{display:flex}
  .mobile-menu.open{display:flex}
  .nav-inner{height:76px}
  .nav-logo{padding:6px 12px;border-radius:8px}
  .nav-logo img{height:42px}
  .nav-mobile-btn{padding:10px}
  .mobile-menu{padding-top:90px}
  .mobile-menu a{font-size:17px;padding:14px 24px}
}

/* ══════ BREADCRUMB ══════ */
.crumb{padding:150px 8% 0;max-width:1200px;margin:0 auto;font-size:.8rem;color:var(--text-muted);display:flex;gap:8px;align-items:center}
.crumb a{color:var(--text-muted);transition:color .2s}
.crumb a:hover{color:var(--gold-bright)}
.crumb span{color:var(--gold-bright)}
@media(max-width:900px){.crumb{padding-top:100px}}

/* ══════ PRODUCT HERO ══════ */
.product-hero{padding:48px 8% 90px;max-width:1200px;margin:0 auto}
.product-hero-grid{display:grid;grid-template-columns:340px 1fr;gap:64px;align-items:center}
.product-logo-frame{
  aspect-ratio:1/1;background:#fff;border-radius:var(--radius-lg);
  border:1px solid var(--border);box-shadow:var(--shadow);
  display:flex;align-items:center;justify-content:center;padding:2.2rem;
}
.product-logo-frame img{width:100%;height:100%;object-fit:contain}
.product-title{font-size:clamp(2.2rem,4.4vw,3.4rem);font-weight:900;line-height:1.1;margin-bottom:1.1rem}
.product-lead{font-size:1rem;line-height:1.85;color:#fff;max-width:620px;margin-bottom:2.2rem}
.product-btns{display:flex;flex-wrap:wrap;gap:14px}
@media(max-width:900px){
  .product-hero-grid{grid-template-columns:1fr;gap:32px}
  .product-logo-frame{width:200px;margin:0 auto}
}

/* ══════ SECTION SHELL ══════ */
.p-section{padding:90px 8%;max-width:1200px;margin:0 auto}
.p-section.alt{background:var(--bg-2);max-width:none;padding-left:8%;padding-right:8%}
.p-section.alt > .p-section-inner{max-width:1200px;margin:0 auto}
.section-header{text-align:center;margin-bottom:56px}
.section-title{font-family:'Segoe UI',system-ui,sans-serif;font-size:clamp(1.7rem,3.6vw,2.6rem);font-weight:900;line-height:1.15}
.section-sub{color:#fff;font-size:.96rem;max-width:600px;margin:1rem auto 0;line-height:1.75}

/* ══════ SPEC CARDS ══════ */
.spec-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.6rem}
.quality-spec-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:2rem;transition:var(--transition)}
.quality-spec-card:hover{border-color:var(--gold-light);box-shadow:var(--shadow-gold);transform:translateY(-4px)}
.quality-spec-card h3{font-size:1rem;font-weight:700;color:var(--gold-bright);margin-bottom:1.2rem;display:flex;align-items:center;gap:10px}
.spec-table{width:100%;border-collapse:collapse}
.spec-table td{padding:8px 0;font-size:.85rem;border-bottom:1px solid rgba(255,255,255,0.05)}
.spec-table td:first-child{color:var(--text-muted)}
.spec-table td:last-child{text-align:right;color:var(--gold-bright);font-weight:600}
.spec-table tr:last-child td{border-bottom:none}

/* ══════ CATALOG VISUAL ══════ */
.catalog-frame{
  background:#fff;border-radius:var(--radius-lg);border:1px solid var(--border);
  box-shadow:var(--shadow);overflow:hidden;
}
.catalog-frame img{width:100%;height:auto;display:block}

/* ══════ RELATED BRANDS ══════ */
.brands-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem}
.brand-card{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
  overflow:hidden;transition:var(--transition);aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;
}
.brand-card img{width:100%;height:100%;object-fit:contain;padding:1rem;transition:transform .4s ease;background:#fff}
.brand-card:hover{border-color:var(--gold-light);box-shadow:var(--shadow-gold);transform:translateY(-5px)}
.brand-card:hover img{transform:scale(1.08)}
@media(max-width:900px){.brands-strip{grid-template-columns:repeat(2,1fr)}}

/* ══════ CTA BAND ══════ */
.cta-band{
  background:linear-gradient(135deg,var(--red-dark),var(--red) 60%,var(--gold) 130%);
  border-radius:var(--radius-lg);padding:56px 48px;text-align:center;
}
.cta-band h2{font-size:clamp(1.5rem,3vw,2.2rem);font-weight:900;color:#fff;margin-bottom:.8rem}
.cta-band p{color:rgba(255,255,255,.85);margin-bottom:1.8rem;max-width:520px;margin-left:auto;margin-right:auto}
.cta-band .btn-primary{background:#fff;color:var(--red-dark)}
.cta-band .btn-primary:hover{background:#f2ede4;color:var(--red-dark)}

/* ══════ FOOTER ══════ */
footer{background:#060606;border-top:1px solid rgba(155,104,0,0.2);padding:60px 8% 30px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:50px;margin-bottom:50px}
.footer-brand img{height:46px;margin-bottom:1.2rem;background:#fdfcfa;padding:8px 14px;border-radius:10px}
.footer-brand p{font-size:.85rem;color:var(--text-muted);line-height:1.75;max-width:300px}
.footer-col h4{font-size:.72rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--gold-bright);margin-bottom:1.2rem}
.footer-col ul li{margin-bottom:.65rem}
.footer-col ul li a{font-size:.85rem;color:var(--text-muted);transition:color .3s}
.footer-col ul li a:hover{color:var(--gold-bright)}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.06);padding-top:28px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}
.footer-bottom p{font-size:.78rem;color:var(--text-dim)}
.social-links{display:flex;gap:12px}
.social-link{width:36px;height:36px;border-radius:8px;background:rgba(255,255,255,0.05);border:1px solid rgba(255,255,255,0.08);display:flex;align-items:center;justify-content:center;font-size:.9rem;transition:var(--transition)}
.social-link:hover{background:rgba(155,104,0,0.2);border-color:var(--gold);color:var(--gold-bright)}
@media(max-width:768px){.footer-grid{grid-template-columns:1fr 1fr;gap:36px}}
@media(max-width:480px){.footer-grid{grid-template-columns:1fr}}

.glass-divider{height:1px;background:linear-gradient(90deg,transparent,var(--gold),transparent);opacity:0.25;margin:0}

/* ══════ BACK TO TOP ══════ */
#back-top{position:fixed;bottom:28px;right:28px;width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--red),var(--gold));display:flex;align-items:center;justify-content:center;font-size:1.1rem;color:#fff;cursor:pointer;opacity:0;transform:translateY(20px);transition:var(--transition);z-index:900;box-shadow:0 4px 20px rgba(0,0,0,0.5)}
#back-top.visible{opacity:1;transform:translateY(0)}
#back-top:hover{transform:translateY(-3px)}

@media(max-width:600px){
  .product-btns .btn-primary,.product-btns .btn-secondary{width:100%;justify-content:center}
}