
/* ---------- Reset & Base ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

:root{
  /* Dark palette by default */
  --bg: #0b1220;
  --surface: #0f172acc;             /* translucent for glass header */
  --surface-strong: #0f172a;
  --card: #101827;
  --line: #1e293b;

  /* Sky blue accents */
  --primary: #38bdf8;               /* Sky Blue 400 */
  --primary-700: #0ea5e9;           /* Sky Blue 500 */
  --secondary: #60a5fa;             /* Light Blue */
  --secondary-700: #3b82f6;         /* Royal Blue */

  /* Typography */
  --text: #e5e7eb;                  /* Light text */
  --muted: #94a3b8;                 /* Muted on dark */
  --nav: #e2e8f0;                   /* Light nav text */

  /* Radii */
  --radius: 16px;
  --radius-sm: 12px;

  /* Shadows tuned for dark */
  --shadow-sm: 0 6px 16px rgba(0,0,0,.35);
  --shadow:    0 16px 40px rgba(0,0,0,.45);
  --shadow-lg: 0 26px 64px rgba(0,0,0,.55);

  /* Motion, layout */
  --transition: .25s cubic-bezier(.2,.8,.2,1);
  --container: 1200px;

  /* Fluid type */
  --fs-0: clamp(.92rem, .8vw, 1rem);
  --fs-1: clamp(1rem, 1vw, 1.08rem);
  --fs-2: clamp(1.08rem, 1.2vw, 1.18rem);
  --fs-3: clamp(1.3rem, 2vw, 1.6rem);
  --fs-4: clamp(1.6rem, 3vw, 2.2rem);
  --fs-5: clamp(2rem, 4vw, 3.1rem);
}

/* Optional: opt-in light theme via .theme-light on <html> or <body> */
.theme-light{
  --bg:#f6f7fb; --surface:#ffffffcc; --surface-strong:#ffffff; --card:#ffffff; --line:#e8ecf2;
  --text:#0f172a; --muted:#64748b; --nav:#0e1430;
  --primary:#3b82f6; --primary-700:#2563eb; --secondary:#60a5fa; --secondary-700:#3b82f6;
  --shadow-sm:0 4px 12px rgba(10,12,20,.08);
  --shadow:0 14px 36px rgba(17,22,44,.10);
  --shadow-lg:0 24px 56px rgba(17,22,44,.16);
}

/* Base body with subtle orbs */
body{
  font-family: 'Inter','Lato',system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  font-size: var(--fs-1);
  line-height: 1.65;
  color: var(--text);
  background:
    radial-gradient(1100px 520px at -10% -10%, rgba(56,189,248,.10) 0%, transparent 55%),
    radial-gradient(900px 480px at 110% -10%, rgba(96,165,250,.10) 0%, transparent 55%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1{ font-size: var(--fs-5); line-height: 1.15; }
h2{ font-size: var(--fs-4); line-height: 1.2; }
h3{ font-size: var(--fs-3); line-height: 1.25; }
h4{ font-size: var(--fs-2); line-height: 1.3; }
p, li { font-size: var(--fs-1); color: var(--text); }

.container { width: min(92%, var(--container)); margin: 0 auto; padding: 0 12px; }

/* ---------- Header & Navigation ---------- */
header{
  position: sticky; top: 0; z-index: 120;
  backdrop-filter: saturate(130%) blur(10px);
  background: linear-gradient(180deg, var(--surface), var(--surface));
  border-bottom: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  padding: 14px 0;
  transition: box-shadow var(--transition), background var(--transition);
}

/* Logo */
.logo{
  text-decoration: none; color: var(--nav);
  font-weight: 900; letter-spacing: .4px;
  font-size: clamp(1.2rem,2.4vw,1.6rem);
  display: inline-flex; align-items: center; gap: 10px;
}
.logo::before{
  content:""; width:22px; height:22px; border-radius:10px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 8px 20px rgba(56,189,248,.35);
}
.logo span{
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* NAV */
nav { position: relative; }
nav ul{
  display:flex; list-style:none; gap:8px; flex-wrap:wrap;
  align-items:center; justify-content:center;
  transition: max-height var(--transition), opacity var(--transition);
}
nav a{
  text-decoration:none; color: var(--nav);
  font-weight: 800; letter-spacing: .15px;
  padding: 12px 14px; border-radius: 12px; line-height: 1;
  border: 1px solid transparent; position: relative; z-index: 1;
  transition: background var(--transition), transform var(--transition),
              box-shadow var(--transition), color var(--transition),
              border-color var(--transition);
}
nav a:hover{
  transform: translateY(-1px);
  background: rgba(56,189,248,.12);
  border-color: rgba(56,189,248,.30);
  box-shadow: 0 10px 26px rgba(2,6,23,.35);
  color: #f1f5f9;
}
nav a.active{
  color: #0b1220;
  border-color: transparent;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 10px 26px rgba(2,6,23,.45);
}

/* Ink bar underline */
.nav-ink{
  position:absolute; left:0; bottom:6px; height:3px; width:0; border-radius:999px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 6px 14px rgba(56,189,248,.35);
  transition: left var(--transition), width var(--transition),
              opacity var(--transition), transform var(--transition);
  opacity: 0; transform: translateY(6px);
}

/* Mobile toggle */
.nav-toggle{
  display:none; position:absolute; right:16px; top:10px; z-index:130;
  border:1px solid var(--line); background: var(--surface-strong);
  border-radius:12px; padding:10px 12px; cursor:pointer; box-shadow: var(--shadow-sm);
}
.nav-toggle .bars{ width:20px; height:12px; position:relative; display:block; }
.nav-toggle .bars::before,.nav-toggle .bars::after,.nav-toggle .bar{
  content:""; position:absolute; left:0; right:0; height:2px;
  border-radius:2px; background: var(--nav);
  transition: transform var(--transition), opacity var(--transition), top var(--transition);
}
.nav-toggle .bar{ top:5px; }
.nav-toggle .bars::before{ top:0; }
.nav-toggle .bars::after{ top:10px; }
body.nav-open .nav-toggle .bars::before{ top:5px; transform: rotate(45deg); }
body.nav-open .nav-toggle .bar{ opacity:0; }
body.nav-open .nav-toggle .bars::after{ top:5px; transform: rotate(-45deg); }

/* Collapsible behaviour */
@media (max-width: 980px){
  .nav-toggle{ display:block; }
  nav ul{
    max-height:0; opacity:0; overflow:hidden; gap:0; margin-top:10px;
    border:1px solid var(--line); border-radius:14px; background: var(--surface-strong);
    box-shadow: var(--shadow); padding:0;
  }
  body.nav-open nav ul{ max-height: 85vh; opacity:1; padding:12px; gap:10px; overflow-y: auto;}
  body.nav-open nav a{ display:block; width:100%; text-align:center; border-radius:10px; }
}

/* ---------- Hero ---------- */
.hero{
  position:relative; text-align:center; color:#e6f4ff; padding: 90px 0; overflow:hidden;
  background:
    radial-gradient(40rem 18rem at 50% -10%, rgba(56,189,248,.18), transparent 60%),
    linear-gradient(120deg, rgba(2,6,23,.95), rgba(15,23,42,.95)),
    url('../images/warehouse.jpg') center/cover no-repeat;
}
.hero::after{
  content:""; position:absolute; inset:0;
  background: radial-gradient(28rem 12rem at 10% 10%, rgba(96,165,250,.14), transparent 60%);
  pointer-events:none;
}
.hero h1{ font-weight:900; letter-spacing:.3px; font-size: var(--fs-5); margin-bottom: 12px; }
.hero p{ font-size: var(--fs-2); opacity:.96; max-width: 760px; margin: 0 auto 28px; }

/* Buttons */
.btn{
  display:inline-block; font-weight:900; text-decoration:none;
  padding:12px 26px; border-radius:999px; border:0; cursor:pointer; color:#0b1220;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 14px 34px rgba(2,6,23,.45);
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
}
.btn:hover{ transform: translateY(-2px); box-shadow: 0 20px 46px rgba(2,6,23,.55); filter: saturate(110%); }

/* ---------- Main & Title ---------- */
main{ padding: 52px 0; }
.page-title{
  text-align:center; margin-bottom:26px; font-weight:900; letter-spacing:.2px;
  font-size: var(--fs-4);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ---------- Breadcrumbs ---------- */
.breadcrumbs{
  display:flex; gap:10px; flex-wrap:wrap; align-items:center;
  margin:8px 0 26px; color: var(--muted); font-size: .96rem;
}
.breadcrumbs .crumb{ display:flex; gap:10px; align-items:center; }
.breadcrumbs .crumb + .crumb::before{ content:"›"; opacity:.6; }
.breadcrumbs a{ color: var(--primary); text-decoration: none; }
.breadcrumbs a:hover{ text-decoration: underline; }

/* ---------- Grids & Cards ---------- */
.categories-grid,.products-grid{
  display:grid; gap:26px;
  grid-template-columns: repeat(auto-fill, minmax(260px,1fr));
  margin-top:28px;
}
.card,.category-card,.product-card{
  position:relative; overflow:hidden; background: var(--card); border:1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.category-card:hover,.product-card:hover{
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(56,189,248,.35);
}
.category-img,.product-img{
  width:100%; aspect-ratio: 16/10; display:block; object-fit: cover;
  filter: saturate(104%) contrast(104%);
}
.category-content,.product-content{ padding:20px; }
.category-content h3,.product-content h3{
  margin-bottom:6px; font-weight:900; font-size: 1.08rem; color:#e9eef7;
}
.product-content p{ margin-top:6px; color: var(--muted); }
.badge{
  position:absolute; top:12px; left:12px; font-size:.78rem; font-weight:900; letter-spacing:.2px;
  padding:6px 10px; border-radius:999px; color:#0b1220;
  background: linear-gradient(135deg, #eaf6ff, #f4faff);
  border:1px solid rgba(56,189,248,.35); box-shadow: var(--shadow-sm);
}

/* ---------- Product Detail ---------- */
.product-detail{
  background: var(--surface-strong); border:1px solid var(--line); border-radius: var(--radius);
  padding:28px; box-shadow: var(--shadow); margin-bottom:36px;
}
.product-image{
  width:100%; max-width:560px; height:auto; border-radius: var(--radius); box-shadow: var(--shadow-sm);
}
.product-info h2{
  font-weight:900; color:#e6edf7; margin:14px 0 16px; font-size: clamp(1.4rem,2.4vw,1.9rem);
}

/* Specs */
.specs{
  background: linear-gradient(180deg, #0c1424, #0f172a);
  border:1px solid var(--line); padding:20px; border-radius: var(--radius-sm); margin:22px 0;
}
.specs h3{ margin-bottom:12px; color:#e6edf7; }
.spec-item{
  display:flex; gap:14px; padding:10px 0; border-bottom:1px dashed #233142;
}
.spec-item:last-child{ border-bottom:0; }
.spec-label{ min-width:200px; font-weight:900; color:#e6edf7; }
.spec-value{ color: var(--text); }

/* ---------- About / Contact ---------- */
.about-content,.contact-info,.contact-form{
  background: var(--surface-strong); border:1px solid var(--line);
  border-radius: var(--radius); padding:26px; box-shadow: var(--shadow);
}
.contact-info h3{ color:#e6edf7; margin-bottom:14px; }
.contact-details p{ color: var(--text); margin-bottom:8px; }

/* ---------- Forms ---------- */
.form-group{ margin-bottom:18px; }
.form-group label{ display:block; margin-bottom:8px; font-weight:900; color:#e6edf7; }
.form-group input,.form-group textarea{
  width:100%; padding:12px 14px; font: inherit; border:1px solid #243244; border-radius:12px; background:#0b1220; color:#e5e7eb;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.form-group textarea{ height:150px; resize: vertical; }
.form-group input::placeholder,.form-group textarea::placeholder{ color:#7a8aa3; }
.form-group input:focus,.form-group textarea:focus{
  outline:none; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(56,189,248,.16);
}
.form-group input.is-invalid,.form-group textarea.is-invalid{
  border-color:#e04848; box-shadow: 0 0 0 4px rgba(224,72,72,.14);
}
.form-note{ margin-top:10px; color: var(--muted); font-style: italic; }

/* ---------- Footer ---------- */
footer{
  background: linear-gradient(180deg, #0a0f1e, #070b16);
  color:#cfd6ea; text-align:center; padding:36px 0; margin-top:40px;
  border-top:1px solid #141c2a; box-shadow: inset 0 1px 0 rgba(255,255,255,.03);
}
.footer-content{ max-width:680px; margin:0 auto; }
.footer-content p{ opacity:.9; }

/* ---------- Feedback / Toast ---------- */
.success-message{
  display:none; margin-top:18px; padding:16px; border-radius:12px;
  background:#0f2a1d; color:#8cf0b9; border:1px solid #154a31; box-shadow: var(--shadow-sm);
}
.toast{
  position:fixed; left:50%; bottom:24px; transform: translateX(-50%) translateY(20px);
  background:#0f172a; color:#fff; border:1px solid #1f2a3d; border-radius:14px;
  padding:12px 16px; box-shadow: var(--shadow-lg);
  opacity:0; pointer-events:none; z-index:9999;
  transition: opacity var(--transition), transform var(--transition);
}
.toast.toast--show{ opacity:1; transform: translateX(-50%) translateY(0); pointer-events:auto; }

/* ---------- Reveal on scroll ---------- */
.reveal{
  opacity:0; transform: translateY(18px) scale(.98);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.is-visible{ opacity:1; transform: translateY(0) scale(1); }

/* ---------- Back to top ---------- */
#toTop{
  position:fixed; right:18px; bottom:18px; z-index:1200; border:0; cursor:pointer;
  border-radius:999px; padding:10px 12px; color:#0b1220;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  font-weight:900; box-shadow: 0 16px 36px rgba(2,6,23,.55);
  opacity:0; transform: translateY(16px);
  transition: opacity var(--transition), transform var(--transition);
}
#toTop.is-visible{ opacity:1; transform: translateY(0); }

/* ---------- Responsive tweaks ---------- */
@media (max-width: 992px){
  .spec-label{ min-width:170px; }
}
@media (max-width: 768px){
  main{ padding:36px 0; }
  .hero{ padding:72px 0; }
  .categories-grid,.products-grid{ grid-template-columns: 1fr; }
  .spec-item{ flex-direction: column; padding:8px 0; }
  .spec-label{ margin-bottom:4px; }
}

/* ---------- Utilities & A11y ---------- */
.text-center{ text-align:center; }
.mb-30{ margin-bottom:30px; }

:focus-visible{
  outline:3px solid var(--primary);
  outline-offset:2px;
  border-radius:10px;
}

@media (prefers-reduced-motion: reduce){
  *{ transition: none !important; animation: none !important; }
}

/* ===== Visibility fix for static pages (About / Contact / Index) ===== */

/* Do not hide content by default */
.reveal { 
  opacity: 1 !important; 
  transform: none !important; 
}
.reveal.is-visible { 
  opacity: 1 !important; 
  transform: none !important; 
}

/* Ensure body copy is readable under headings */
main p,
main li {
  color: var(--text);
  opacity: 1;
}

/* Optional: comfortable spacing for markdown-like content */
main h2 { margin-bottom: 18px; }
main h3 { margin-top: 18px; margin-bottom: 8px; }
main p + p { margin-top: 10px; }
main ul, main ol { margin: 10px 0 0 18px; }

img {
  width: 100%;
  aspect-ratio: 16 / 16;
  object-fit: cover;
  display: block;
}
