:root{
  --bg:#F5F8FA;
  --text:#0F172A;
  --muted:#475569;
  --blue-900:#0B2F6B;
  --blue-800:#0B3A88;
  --blue-700:#1E40AF;
  --blue-600:#2563EB;
  --blue-500:#2F7DF6;
  --line:#E5E7EB;
  --card:#FFFFFF;
  --shadow:0 10px 25px rgba(2, 6, 23, 0.08);
  --shadow-soft:0 6px 16px rgba(2, 6, 23, 0.06);
  --radius:14px;
  --yellow:#FACC15;
}

*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:'Inter',sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
}

/* Skip link */
.skip-link{
  position:absolute;
  top:-100%;
  left:16px;
  background:var(--blue-600);
  color:#fff;
  padding:8px 16px;
  border-radius:0 0 8px 8px;
  font-weight:700;
  font-size:0.9rem;
  z-index:100;
  text-decoration:none;
  transition:top .2s ease;
}
.skip-link:focus{
  top:0;
}

/* Focus styles */
:focus-visible{
  outline:3px solid var(--blue-500);
  outline-offset:2px;
  border-radius:4px;
}

.container{max-width:1120px;margin:0 auto;padding:0 22px;}

/* Header */
.site-header{
  background:linear-gradient(90deg,var(--blue-900),var(--blue-800) 45%, #1A7CE6);
  color:#fff;
  position:sticky;
  top:0;
  z-index:50;
  box-shadow:0 10px 30px rgba(2, 6, 23, 0.18);
}
.header-inner{
  height:78px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.logo img{height:44px;width:auto;display:block;}

/* Hamburger toggle */
.nav-toggle{
  display:none;
  background:none;
  border:none;
  cursor:pointer;
  padding:6px;
  flex-direction:column;
  gap:5px;
  z-index:60;
}
.nav-toggle-bar{
  display:block;
  width:26px;
  height:3px;
  background:#fff;
  border-radius:2px;
  transition:transform .25s ease, opacity .25s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1){
  transform:translateY(8px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2){
  opacity:0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3){
  transform:translateY(-8px) rotate(-45deg);
}

.nav{display:flex;align-items:center;gap:34px;}
.nav a{
  color:#fff;
  text-decoration:none;
  font-weight:600;
  font-size:0.95rem;
  opacity:0.95;
  transition:opacity .2s ease, transform .2s ease;
}
.nav a:hover{opacity:1;transform:translateY(-1px);}
.nav a.active{opacity:1;border-bottom:2px solid var(--yellow);padding-bottom:2px;}

/* Hero */
.hero{
  background:linear-gradient(135deg,var(--blue-800), #3AA6F7);
  color:#fff;
  padding:54px 0 44px;
  position:relative;
  overflow:hidden;
}
.hero::after{
  content:"";
  position:absolute;
  inset:auto -20% -60% -20%;
  height:320px;
  background:rgba(255,255,255,0.14);
  transform:skewY(-8deg);
}
.hero-grid{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:36px;
}
.hero-content{max-width:560px;}
.hero h1{
  font-size:2.6rem;
  line-height:1.15;
  letter-spacing:-0.02em;
  margin-bottom:16px;
  font-weight:800;
}
.hero p{
  font-size:1.05rem;
  opacity:0.95;
  margin-bottom:22px;
}

.btn{
  display:inline-block;
  text-decoration:none;
  font-weight:700;
  border-radius:10px;
  padding:12px 22px;
}
.btn-primary{
  background:var(--yellow);
  color:var(--blue-800);
  box-shadow:0 8px 18px rgba(0,0,0,0.18);
  transition:transform .15s ease, filter .15s ease;
}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.02);}

.hero-visual{flex:1;display:flex;justify-content:flex-end;}
.hero-visual img{
  width:min(520px, 100%);
  height:auto;
  display:block;
  filter:drop-shadow(0 18px 35px rgba(0,0,0,0.18));
}

/* Detail pages */
.page-hero{
  background:linear-gradient(135deg,var(--blue-800), #3AA6F7);
  color:#fff;
  padding:46px 0 34px;
}
.page-hero h1{
  font-size:2.15rem;
  line-height:1.15;
  letter-spacing:-0.02em;
  margin-bottom:10px;
  font-weight:900;
}
.page-hero p{opacity:0.95;max-width:920px;margin-bottom:18px;}

/* Sections */
.section{padding:56px 0;}
.section--about{padding-top:46px;}

.section-title{color:var(--blue-700);}
.section-title--left{
  font-size:1.9rem;
  font-weight:800;
  margin-bottom:14px;
}
.section-title--center{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:18px;
  margin:8px 0 26px;
}
.section-title--center::before,
.section-title--center::after{
  content:"";
  height:1px;
  background:var(--line);
  flex:1;
}
.section-title--center span{
  font-size:1.8rem;
  font-weight:800;
  padding:0 8px;
}

.lead{color:var(--muted);max-width:980px;}

/* Cards */
.section--cards{padding-top:34px;}
.cards-grid{
  display:grid;
  grid-template-columns:repeat(4, minmax(0, 1fr));
  gap:18px;
}
.card{
  background:var(--card);
  border-radius:var(--radius);
  padding:22px;
  box-shadow:var(--shadow-soft);
  border:1px solid rgba(226,232,240,0.7);
  transition:transform .18s ease, box-shadow .18s ease;
}
.card--link{
  display:block;
  color:inherit;
  text-decoration:none;
  cursor:pointer;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.card-icon{width:68px;height:auto;margin-bottom:12px;display:block;}
.card h3{color:var(--blue-700);font-weight:800;font-size:1.02rem;margin-bottom:6px;}
.card p{color:var(--muted);font-size:0.95rem;}
.card p + p{margin-top:10px;}

.card-cta{
  display:inline-block;
  margin-top:12px;
  color:var(--blue-600);
  font-weight:800;
  font-size:0.92rem;
}

.card-links{
  margin-top:12px;
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}
.card-link{
  color:var(--blue-600);
  font-weight:700;
  text-decoration:none;
  font-size:0.92rem;
}
.card-link:hover{text-decoration:underline;}
.card-title-link{color:inherit;text-decoration:none;}
.card-title-link:hover{text-decoration:underline;}

.clients-grid{grid-template-columns:repeat(3, minmax(0, 1fr));}

/* Contact */
.section--contact{padding-top:44px;padding-bottom:64px;}
.contact-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
  align-items:start;
}
.contact-intro .lead{margin-bottom:20px;}
.contact-name{font-size:1.25rem;font-weight:800;color:var(--blue-900);margin-bottom:4px;}
.contact-role{color:var(--muted);font-size:0.95rem;}
.contact-cards{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:14px;
}
.contact-card{
  display:flex;
  align-items:center;
  gap:16px;
  background:var(--card);
  border:1px solid rgba(226,232,240,0.7);
  border-radius:var(--radius);
  padding:18px 20px;
  text-decoration:none;
  color:inherit;
  transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.contact-card:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow);
  border-color:var(--blue-500);
}
.contact-card:hover .contact-card-arrow{
  opacity:1;
  transform:translateX(0);
}
.contact-card-icon{
  display:flex;
  align-items:center;
  justify-content:center;
  width:48px;
  height:48px;
  min-width:48px;
  border-radius:12px;
  background:linear-gradient(135deg,var(--blue-600),var(--blue-500));
  color:#fff;
}
.contact-card-body{
  display:flex;
  flex-direction:column;
  gap:1px;
  flex:1;
  min-width:0;
}
.contact-card-label{
  font-size:0.78rem;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:0.05em;
  color:var(--muted);
}
.contact-card-value{
  font-weight:700;
  font-size:0.95rem;
  color:var(--blue-700);
  word-break:break-word;
}
.contact-card-hint{
  font-size:0.82rem;
  color:var(--muted);
  opacity:0.75;
  margin-top:2px;
}
.contact-card-arrow{
  font-size:1.1rem;
  font-weight:700;
  color:var(--blue-500);
  opacity:0;
  transform:translateX(-6px);
  transition:opacity .2s ease, transform .2s ease;
}

/* Back to top */
.back-to-top{
  position:fixed;
  bottom:28px;
  right:28px;
  width:44px;
  height:44px;
  border-radius:50%;
  border:none;
  background:var(--blue-600);
  color:#fff;
  font-size:1.3rem;
  cursor:pointer;
  box-shadow:0 4px 14px rgba(0,0,0,0.22);
  opacity:0;
  visibility:hidden;
  transition:opacity .25s ease, visibility .25s ease, transform .15s ease;
  z-index:40;
}
.back-to-top.visible{
  opacity:1;
  visibility:visible;
}
.back-to-top:hover{
  transform:translateY(-2px);
}

/* Footer */
.site-footer{
  background:linear-gradient(90deg,var(--blue-900),var(--blue-800) 45%, #1A7CE6);
  color:#fff;
  padding:28px 0;
  font-size:0.9rem;
}
.footer-inner{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:12px;
}
.footer-nav{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:22px;
}
.footer-nav a{
  color:rgba(255,255,255,0.85);
  text-decoration:none;
  font-weight:600;
  font-size:0.88rem;
  transition:color .2s ease;
}
.footer-nav a:hover{
  color:#fff;
}

/* Scroll animations */
.fade-in{
  opacity:0;
  transform:translateY(24px);
  transition:opacity .5s ease, transform .5s ease;
}
.fade-in.visible{
  opacity:1;
  transform:translateY(0);
}

/* Responsive */
@media (max-width: 980px){
  .cards-grid{grid-template-columns:repeat(2, minmax(0, 1fr));}
  .clients-grid{grid-template-columns:repeat(2, minmax(0, 1fr));}
  .hero-grid{flex-direction:column;align-items:flex-start;}
  .hero-visual{justify-content:flex-start;width:100%;}
  .contact-grid{grid-template-columns:1fr;gap:28px;}
}
@media (max-width: 520px){
  .nav-toggle{display:flex;}
  .nav{
    position:fixed;
    inset:0;
    background:linear-gradient(135deg,var(--blue-900),var(--blue-800));
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:28px;
    z-index:55;
    opacity:0;
    visibility:hidden;
    transition:opacity .25s ease, visibility .25s ease;
  }
  .nav.open{
    opacity:1;
    visibility:visible;
  }
  .nav a{
    font-size:1.2rem;
  }
  .hero h1{font-size:2.15rem;}
  .cards-grid{grid-template-columns:1fr;}
  .contact-cards{grid-template-columns:1fr;}
}