/* ===== CSS VARIABLES ===== */
:root {
  --primary:   #1a3a5c;
  --primary-d: #0f2540;
  --accent:    #f47920;
  --accent-d:  #d4631a;
  --text:      #2d3748;
  --text-l:    #5a6478;
  --bg:        #f7f8fc;
  --white:     #ffffff;
  --border:    #e2e8f0;
  --shadow:    0 4px 24px rgba(0,0,0,.10);
  --radius:    10px;
  --trans:     .3s ease;
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* Accessible focus indicator on every focusable element */
a:focus-visible, button:focus-visible, input:focus-visible,
select:focus-visible, textarea:focus-visible, [tabindex]:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Skip-to-content link — visible only when focused */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--primary);
  color: #fff;
  padding: 10px 16px;
  z-index: 10000;
  border-radius: 0 0 6px 0;
  font-weight: 600;
}
.skip-link:focus { left: 0; }

.section-tag--why { background: rgba(244,121,32,.25); }

/* ===== UTILITIES ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section    { padding: 88px 0; }
.section-tag {
  display: inline-block;
  background: rgba(244,121,32,.12);
  color: var(--accent);
  font-size: .78rem; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase;
  padding: 5px 14px; border-radius: 50px; margin-bottom: 12px;
}
.section-title {
  font-size: clamp(1.7rem, 3vw, 2.5rem);
  font-weight: 800; color: var(--primary); line-height: 1.2; margin-bottom: 16px;
}
.section-title span { color: var(--accent); }
.section-sub { font-size: 1.05rem; color: var(--text-l); max-width: 560px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: 50px;
  font-size: .95rem; font-weight: 700; cursor: pointer;
  transition: var(--trans); border: none;
}
.btn-primary { background: var(--accent); color: var(--white); }
.btn-primary:hover { background: var(--accent-d); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(244,121,32,.35); }
.btn-outline  { background: transparent; color: var(--white); border: 2px solid rgba(255,255,255,.6); }
.btn-outline:hover { background: rgba(255,255,255,.15); border-color: var(--white); }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }

/* ===== TOPBAR ===== */
.topbar { background: var(--primary-d); color: rgba(255,255,255,.75); font-size: .8rem; padding: 8px 0; }
.topbar .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 6px; }
.topbar a { color: rgba(255,255,255,.85); transition: color var(--trans); }
.topbar a:hover { color: var(--accent); }
.topbar-items { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; }
.topbar-items span { display: flex; align-items: center; gap: 5px; }

/* ===== NAVBAR ===== */
.navbar {
  position: sticky; top: 0; z-index: 1000;
  background: var(--white);
  border-bottom: 1px solid rgba(0,0,0,.06);
  box-shadow: 0 4px 24px rgba(0,0,0,.10);
}
.navbar::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}
.navbar .container { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon {
  width: 44px; height: 44px; background: var(--primary);
  border-radius: 10px; display: flex; align-items: center; justify-content: center;
}
.logo-text { line-height: 1.1; }
.logo-text strong { display: block; font-size: 1.15rem; font-weight: 800; color: var(--primary); }
.logo-text span   { font-size: .7rem; color: var(--accent); font-weight: 600; letter-spacing: .05em; text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a { padding: 8px 14px; border-radius: 8px; font-size: .92rem; font-weight: 500; color: var(--text); transition: var(--trans); }
.nav-links a:hover, .nav-links a.active { color: var(--accent); background: rgba(244,121,32,.08); }
.nav-cta { padding: 10px 24px !important; background: var(--accent) !important; color: var(--white) !important; border-radius: 50px !important; font-weight: 700 !important; }
.nav-cta:hover { background: var(--accent-d) !important; transform: translateY(-1px); }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; border: none; background: none; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--primary); border-radius: 2px; transition: var(--trans); }

/* ===== HERO ===== */
.hero { position: relative; min-height: 92vh; display: flex; align-items: center; overflow: hidden; }
.hero-bg     { position: absolute; inset: 0; background: var(--hero-bg) center / cover no-repeat; }
.hero-overlay{ position: absolute; inset: 0; background: linear-gradient(105deg, rgba(10,24,47,.88) 45%, rgba(10,24,47,.50) 100%); }
.hero-content{ position: relative; z-index: 2; max-width: 680px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(244,121,32,.2); border: 1px solid rgba(244,121,32,.4);
  color: #ffa55e; padding: 6px 16px; border-radius: 50px;
  font-size: .8rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 24px;
}
.hero-badge::before {
  content: ''; width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent); animation: pulse 1.8s infinite;
}
@keyframes pulse {
  0%,100% { opacity:1; transform:scale(1); }
  50%      { opacity:.5; transform:scale(1.4); }
}
.hero-title { font-size: clamp(1.9rem, 4vw, 3.2rem); font-weight: 800; color: var(--white); line-height: 1.15; margin-bottom: 20px; }
.hero-title span { color: var(--accent); }
.hero-desc  { font-size: 1.1rem; color: rgba(255,255,255,.78); margin-bottom: 36px; max-width: 560px; }
.hero-btns  { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats {
  position: relative; z-index: 2; display: flex;
  margin-top: 56px;
  background: rgba(255,255,255,.07); backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,.12); border-radius: var(--radius); overflow: hidden; max-width: 580px;
}
.hero-stat { flex: 1; padding: 20px 24px; text-align: center; border-right: 1px solid rgba(255,255,255,.12); }
.hero-stat:last-child { border-right: none; }
.hero-stat-num { font-size: 1.7rem; font-weight: 900; color: var(--white); line-height: 1; }
.hero-stat-num span { color: var(--accent); }
.hero-stat-lbl { font-size: .72rem; color: rgba(255,255,255,.6); margin-top: 4px; text-transform: uppercase; letter-spacing: .06em; }

/* ===== MARQUEE ===== */
.marquee-wrap  { background: var(--accent); padding: 12px 0; overflow: hidden; }
.marquee-track { display: flex; animation: marquee 28s linear infinite; white-space: nowrap; will-change: transform; }
.marquee-item  { display: inline-flex; align-items: center; gap: 10px; padding: 0 32px; color: var(--white); font-size: .87rem; font-weight: 600; letter-spacing: .03em; }
.marquee-sep   { color: rgba(255,255,255,.4); font-size: .7rem; }
@keyframes marquee { 0% { transform:translateX(0); } 100% { transform:translateX(-50%); } }

/* ===== ABOUT ===== */
.about { background: var(--bg); }
.about-img-wrap { position: relative; border-radius: 16px; overflow: hidden; box-shadow: var(--shadow); }
.about-img-wrap img { width: 100%; height: 480px; object-fit: cover; }
.about-badge {
  position: absolute; bottom: 24px; left: 24px;
  background: var(--accent); color: var(--white); padding: 16px 24px; border-radius: 12px; font-weight: 800;
}
.about-badge strong { display: block; font-size: 1.8rem; line-height: 1; }
.about-badge span   { font-size: .78rem; letter-spacing: .04em; opacity: .9; }
.about-text { padding-left: 8px; }
.about-list { margin: 28px 0; display: flex; flex-direction: column; gap: 14px; }
.about-list-item { display: flex; gap: 14px; align-items: flex-start; }
.about-icon {
  flex-shrink: 0; width: 40px; height: 40px;
  background: rgba(244,121,32,.12); border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
}
.about-icon svg { fill: var(--accent); }
.about-list-item p      { font-size: .95rem; color: var(--text-l); padding-top: 4px; }
.about-list-item strong { display: block; color: var(--primary); font-weight: 700; }

/* ===== PRODUCTS ===== */
.products-header { text-align: center; margin-bottom: 52px; }
.products-header .section-sub { margin: 0 auto; }
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.product-card {
  background: var(--white); border-radius: 14px; overflow: hidden;
  box-shadow: 0 2px 16px rgba(0,0,0,.07); transition: var(--trans);
  border: 1px solid var(--border);
}
.product-card:hover { transform: translateY(-6px); box-shadow: 0 12px 40px rgba(0,0,0,.13); }
.product-img { height: 220px; overflow: hidden; position: relative; background: linear-gradient(135deg,#1a3a5c,#0f2540); }
.product-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.product-card:hover .product-img img { transform: scale(1.06); }
.product-icon-placeholder { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; }
.product-icon-placeholder svg { width: 80px; height: 80px; fill: rgba(244,121,32,.7); }
.product-cat {
  position: absolute; top: 14px; left: 14px;
  background: var(--accent); color: var(--white);
  font-size: .72rem; font-weight: 700; padding: 4px 10px; border-radius: 50px; letter-spacing: .05em;
}
.product-body { padding: 22px; }
.product-body h3 { font-size: 1.05rem; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.product-body p  { font-size: .88rem; color: var(--text-l); line-height: 1.6; margin-bottom: 16px; }
.product-tags    { display: flex; flex-wrap: wrap; gap: 6px; }
.product-tag     { font-size: .72rem; padding: 3px 10px; border-radius: 50px; background: rgba(26,58,92,.08); color: var(--primary); font-weight: 600; }

/* ===== WHY CHOOSE US ===== */
.why { background: var(--primary); }
.why .section-title { color: var(--white); }
.why .section-sub   { color: rgba(255,255,255,.65); }
.why-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; margin-top: 52px; }
.why-card {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1);
  border-radius: 14px; padding: 32px 28px; transition: var(--trans);
}
.why-card:hover { background: rgba(255,255,255,.10); transform: translateY(-4px); }
.why-card-icon  {
  width: 56px; height: 56px; background: rgba(244,121,32,.2);
  border-radius: 14px; display: flex; align-items: center; justify-content: center; margin-bottom: 20px;
}
.why-card-icon svg { fill: var(--accent); }
.why-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--white); margin-bottom: 10px; }
.why-card p  { font-size: .88rem; color: rgba(255,255,255,.6); line-height: 1.65; }

/* ===== STATS ===== */
.stats { background: var(--accent); padding: 64px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 32px; text-align: center; }
.stat-num { font-size: 3rem; font-weight: 900; color: var(--white); line-height: 1; }
.stat-lbl { font-size: .85rem; color: rgba(255,255,255,.8); font-weight: 600; margin-top: 6px; text-transform: uppercase; letter-spacing: .06em; }
.stat-sep { width: 40px; height: 3px; background: rgba(255,255,255,.3); margin: 12px auto 0; border-radius: 2px; }

/* ===== CTA ===== */
.cta { position: relative; padding: 100px 0; overflow: hidden; text-align: center; }
.cta-bg      { position: absolute; inset: 0; background: var(--cta-bg) center / cover no-repeat; }
.cta-overlay { position: absolute; inset: 0; background: rgba(10,24,47,.87); }
.cta-content { position: relative; z-index: 2; max-width: 640px; margin: 0 auto; }
.cta-content .section-title { color: var(--white); }
.cta-content .section-sub   { color: rgba(255,255,255,.7); margin: 0 auto 36px; }
.cta-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ===== CONTACT ===== */
.contact { background: var(--bg); }
.contact-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 56px; }
.contact-info h3 { font-size: 1.6rem; font-weight: 800; color: var(--primary); margin-bottom: 8px; }
.contact-info > p { color: var(--text-l); margin-bottom: 32px; }
.contact-items { display: flex; flex-direction: column; gap: 20px; }
.contact-item  { display: flex; gap: 14px; align-items: flex-start; }
.contact-icon  {
  flex-shrink: 0; width: 46px; height: 46px; background: var(--primary);
  border-radius: 12px; display: flex; align-items: center; justify-content: center;
}
.contact-item-body strong { display: block; font-size: .8rem; color: var(--text-l); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 2px; }
.contact-item-body p { color: var(--primary); font-weight: 600; font-size: .97rem; }
.contact-item-body a { color: var(--primary); }
.contact-form { background: var(--white); padding: 40px; border-radius: 16px; box-shadow: var(--shadow); }
.contact-form h3 { font-size: 1.35rem; font-weight: 800; color: var(--primary); margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.form-group label { font-size: .82rem; font-weight: 700; color: var(--text-l); text-transform: uppercase; letter-spacing: .04em; }
.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 16px; border: 2px solid var(--border); border-radius: 10px;
  font-size: .95rem; color: var(--text); font-family: inherit;
  background: var(--white); transition: border-color var(--trans); outline: none; width: 100%;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--accent); }
.form-group textarea { resize: vertical; min-height: 110px; }
.form-submit {
  width: 100%; padding: 15px; background: var(--accent); color: var(--white);
  font-size: 1rem; font-weight: 700; border: none; border-radius: 50px;
  cursor: pointer; transition: var(--trans); font-family: inherit;
}
.form-submit:hover { background: var(--accent-d); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(244,121,32,.35); }
.form-success {
  display: none; text-align: center; padding: 16px; background: #d1fae5;
  border-radius: 10px; color: #065f46; font-weight: 700; margin-top: 12px;
}
.form-error {
  display: none; text-align: center; padding: 16px; background: #fee2e2;
  border-radius: 10px; color: #991b1b; font-weight: 700; margin-top: 12px;
}

/* ===== FOOTER ===== */
footer { background: var(--primary-d); color: rgba(255,255,255,.7); padding: 64px 0 0; }
.footer-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 40px;
  padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-brand p { font-size: .88rem; line-height: 1.7; max-width: 280px; }
.footer-col h3 { font-size: .82rem; font-weight: 700; color: var(--white); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 18px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: .88rem; transition: color var(--trans); }
.footer-links a:hover { color: var(--accent); }
.footer-contact-item { display: flex; gap: 10px; margin-bottom: 12px; font-size: .88rem; align-items: flex-start; }
.footer-contact-item a { color: rgba(255,255,255,.7); }
.footer-contact-item a:hover { color: var(--accent); }
.footer-bottom { padding: 20px 0; display: flex; justify-content: space-between; align-items: center; font-size: .82rem; flex-wrap: wrap; gap: 8px; }
.footer-bottom span { color: var(--accent); }

/* ===== BACK TO TOP ===== */
.back-top {
  position: fixed; bottom: 28px; right: 28px;
  width: 46px; height: 46px; background: var(--accent); border: none; border-radius: 50%;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 16px rgba(244,121,32,.4); opacity: 0; pointer-events: none;
  transition: opacity .3s, transform .3s; z-index: 999;
}
.back-top.visible { opacity: 1; pointer-events: all; }
.back-top:hover { transform: translateY(-3px); }

/* Skip rendering work for sections that are off-screen until they scroll near the viewport.
   contain-intrinsic-size reserves space so CLS stays 0. */
.section, .stats, .cta, footer {
  content-visibility: auto;
  contain-intrinsic-size: 1px 700px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .products-grid { grid-template-columns: repeat(2,1fr); }
  .stats-grid    { grid-template-columns: repeat(2,1fr); }
  .footer-grid   { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .topbar .topbar-items:first-child { display: none; }
  .nav-links {
    display: none; flex-direction: column;
    position: absolute; top: 72px; left: 0; right: 0;
    background: var(--white); padding: 16px 24px;
    border-top: 1px solid var(--border); box-shadow: 0 8px 24px rgba(0,0,0,.1);
  }
  .nav-links.open { display: flex; }
  .hamburger { display: flex; }
  .grid-2, .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .why-grid  { grid-template-columns: 1fr; }
  .form-row  { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero { min-height: 85vh; }
  .hero-stats { flex-direction: column; }
  .hero-stat { border-right: none; border-bottom: 1px solid rgba(255,255,255,.12); }
  .hero-stat:last-child { border-bottom: none; }
  .section { padding: 60px 0; }
  .about-img-wrap img { height: 320px; }
  .contact-form { padding: 24px; }
}
@media (max-width: 480px) {
  .hero-title { font-size: 2rem; }
  .hero-btns, .cta-btns { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .products-grid { grid-template-columns: 1fr; }
  .stats-grid    { grid-template-columns: repeat(2,1fr); }
}

/* ===== PAGE SKELETON / PRELOADER ===== */
.page-skeleton {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--white);
  overflow: hidden;
  opacity: 1;
  transition: opacity .25s ease, visibility .25s ease;
  contain: strict;
}
.page-skeleton.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
/* One composited animation, shared by every shimmer element via ::after */
@keyframes sk-shimmer {
  100% { transform: translate3d(100%, 0, 0); }
}
.sk-box, .sk-line, .sk-card, .sk-stat, .sk-topbar {
  position: relative;
  overflow: hidden;
  background: #edf0f5;
  border-radius: 6px;
}
.sk-box::after, .sk-line::after, .sk-card::after,
.sk-stat::after, .sk-topbar::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.65), transparent);
  transform: translate3d(-100%, 0, 0);
  animation: sk-shimmer 1.4s linear infinite;
  will-change: transform;
}
.sk-topbar { height: 32px; border-radius: 0; }
.sk-navbar {
  height: 70px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
}
.sk-navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.sk-logo { display: flex; align-items: center; gap: 12px; }
.sk-logo-icon { width: 42px; height: 42px; border-radius: 10px; }
.sk-lines { display: flex; flex-direction: column; gap: 6px; }
.sk-line { height: 12px; width: 200px; }
.sk-line-xs { width: 60px; height: 10px; }
.sk-line-sm { width: 120px; height: 10px; }
.sk-line-md { width: 280px; }
.sk-line-pill { width: 180px; height: 26px; border-radius: 999px; margin-bottom: 24px; }
.sk-line-hero { width: 70%; height: 36px; margin-bottom: 14px; }
.sk-nav-links { display: flex; align-items: center; gap: 24px; }
.sk-nav-cta { width: 110px; height: 38px; border-radius: 8px; }
.sk-hero {
  padding: 80px 0;
  background: linear-gradient(180deg, #f7f8fc 0%, #ffffff 100%);
}
.sk-hero-btns { display: flex; gap: 14px; margin: 28px 0 40px; }
.sk-btn { width: 170px; height: 48px; border-radius: 8px; }
.sk-hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  max-width: 600px;
}
.sk-stat { height: 70px; border-radius: 8px; }
.sk-section { padding: 60px 0; }
.sk-products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.sk-card { height: 320px; border-radius: var(--radius); }

@media (max-width: 768px) {
  .sk-nav-links { display: none; }
  .sk-line-hero { width: 90%; height: 28px; }
  .sk-hero-stats { grid-template-columns: 1fr; }
  .sk-products-grid { grid-template-columns: 1fr; }
}