/* ==========================================================================
   ABTD Shared Styles — American Board for Training & Development
   ========================================================================== */

/* ---------- Variables ---------- */
:root{
  --navy:#0B1F3A;
  --blue:#174EA6;
  --blue-2:#2B6DE8;
  --red:#C62828;
  --red-2:#E53935;
  --white:#ffffff;
  --off:#F6F8FB;
  --line:#E5EAF1;
  --text:#172033;
  --muted:#667085;
  --shadow:0 18px 50px rgba(11,31,58,.10);
  --shadow-sm:0 8px 24px rgba(11,31,58,.06);
  --shadow-lg:0 24px 60px rgba(11,31,58,.12);
  --radius:22px;
  --radius-sm:14px;
  --radius-xs:10px;
  --max:1200px;
  --transition:all .3s cubic-bezier(.4,0,.2,1);
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"Inter",system-ui,-apple-system,sans-serif;
  color:var(--text);
  background:var(--white);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;display:block;height:auto}
a{text-decoration:none;color:inherit}
button,input,textarea,select{font:inherit}
ul,ol{list-style:none}

/* ---------- Utilities ---------- */
.container{width:min(var(--max),92%);margin-inline:auto}
.section{padding:88px 0}
.section.soft{background:var(--off)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}

/* ---------- Typography ---------- */
h1,h2,h3,h4{line-height:1.15;color:var(--navy)}
h1{font-family:"Merriweather",serif;letter-spacing:-.04em;font-size:clamp(2.4rem,5.5vw,3.6rem)}
h2{font-size:clamp(2rem,4vw,3.25rem);letter-spacing:-.03em}
h3{font-size:1.15rem}
p{color:var(--muted)}
.lead{font-size:1.07rem;color:var(--muted);max-width:720px}

/* ---------- Eyebrow ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  color:var(--blue);
  font-weight:800;
  font-size:.82rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:26px;height:3px;border-radius:99px;background:var(--red);
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  padding:14px 22px;
  border-radius:var(--radius-sm);
  font-weight:800;
  font-size:.95rem;
  border:1px solid transparent;
  cursor:pointer;
  transition:var(--transition);
  white-space:nowrap;
}
.btn:active{transform:scale(.97)}
.btn.primary{background:var(--blue);color:#fff;box-shadow:0 12px 26px rgba(23,78,166,.18)}
.btn.primary:hover{background:var(--navy);transform:translateY(-2px);box-shadow:0 16px 32px rgba(23,78,166,.22)}
.btn.secondary{border-color:var(--line);background:#fff;color:var(--navy)}
.btn.secondary:hover{border-color:#bac7d8;transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.btn.red{background:var(--red);color:#fff}
.btn.red:hover{background:var(--red-2);transform:translateY(-2px)}
.btn.light{background:#fff;color:var(--navy)}
.btn.light:hover{background:#f8f9fb;transform:translateY(-2px)}
.btn.sm{padding:10px 16px;font-size:.88rem;border-radius:var(--radius-xs)}

/* ---------- Cards ---------- */
.card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:28px;
  transition:var(--transition);
}
.card:hover{
  transform:translateY(-5px);
  box-shadow:0 16px 38px rgba(11,31,58,.08);
  border-color:#ccd7e6;
}
.icon-box{
  width:48px;height:48px;
  border-radius:14px;
  display:grid;place-items:center;
  font-weight:900;
  color:var(--blue);
  background:#EEF4FF;
  margin-bottom:20px;
}
.card:nth-child(even) .icon-box{color:var(--red);background:#FFF0F0}
.card h3{color:var(--navy);font-size:1.12rem;margin-bottom:10px}
.card p{color:var(--muted);font-size:.93rem}

/* ---------- Section Head ---------- */
.section-head{
  display:flex;align-items:end;justify-content:space-between;
  gap:30px;margin-bottom:40px;
}
.section-head h2{color:var(--navy)}
.section-head p{color:var(--muted);max-width:660px}

/* ---------- Grid ---------- */
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:1fr 1fr}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* ==========================================================================
   Top Bar
   ========================================================================== */
.topbar{
  background:var(--navy);
  color:#dfe8f6;
  font-size:.86rem;
  padding:9px 0;
}
.topbar-inner{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
}
.topbar span{opacity:.9}

/* ==========================================================================
   Header / Navbar
   ========================================================================== */
header{
  position:sticky;
  top:0;
  z-index:99;
  background:rgba(255,255,255,.93);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(229,234,241,.8);
  transition:var(--transition);
}
header.scrolled{
  box-shadow:0 4px 20px rgba(11,31,58,.06);
}
nav{
  height:78px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:30px;
}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  min-width:0;
  flex-shrink:0;
}
.brand-mark{
  width:44px;height:44px;
  display:grid;place-items:center;
  border-radius:13px;
  background:linear-gradient(145deg,var(--navy),var(--blue));
  color:white;
  font-weight:800;
  box-shadow:0 10px 24px rgba(23,78,166,.22);
  position:relative;
  overflow:hidden;
  flex-shrink:0;
}
img.brand-mark{
  width:44px;height:44px;
  object-fit:contain;
  border-radius:0;
  background:none;
  box-shadow:none;
}
img.brand-mark::after{display:none}
.brand-text strong{
  display:block;
  font-size:.92rem;
  color:var(--navy);
  letter-spacing:-.01em;
  line-height:1.25;
}
.brand-text small{color:var(--muted);font-size:.72rem;display:block}
.nav-links{
  display:flex;
  align-items:center;
  gap:24px;
  font-weight:600;
  font-size:.9rem;
}
.nav-links a{
  position:relative;
  transition:color .2s;
}
.nav-links a:hover{color:var(--blue)}
.nav-links a::after{
  content:"";
  position:absolute;
  bottom:-4px;left:0;right:0;
  height:2px;
  background:var(--blue);
  border-radius:2px;
  transform:scaleX(0);
  transition:transform .25s;
}
.nav-links a:hover::after,
.nav-links a.active::after{
  transform:scaleX(1);
}
.nav-links a.active{color:var(--blue)}
.nav-cta{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:11px 18px;
  border-radius:var(--radius-xs);
  background:var(--red);
  color:white !important;
  box-shadow:0 8px 20px rgba(198,40,40,.16);
  transition:var(--transition);
}
.nav-cta::after{display:none !important}
.nav-cta:hover{
  background:var(--red-2);
  transform:translateY(-2px);
  box-shadow:0 12px 28px rgba(198,40,40,.22);
}
.menu-btn{
  display:none;
  border:0;background:transparent;
  font-size:1.6rem;color:var(--navy);cursor:pointer;
  width:44px;height:44px;
  border-radius:var(--radius-xs);
  transition:var(--transition);
}
.menu-btn:hover{background:var(--off)}

/* Mobile nav dropdown */
@media(max-width:980px){
  .nav-links{
    display:none;
    position:absolute;
    left:3%;right:3%;top:78px;
    background:#fff;
    border:1px solid var(--line);
    border-radius:18px;
    padding:20px;
    box-shadow:var(--shadow-lg);
    flex-direction:column;
    align-items:stretch;
    gap:4px;
  }
  .nav-links.open{display:flex}
  .nav-links a{
    padding:12px 16px;
    border-radius:var(--radius-xs);
    font-size:.95rem;
  }
  .nav-links a:hover{background:var(--off)}
  .nav-cta{
    margin-top:8px;
    text-align:center;
    padding:14px;
  }
  .menu-btn{display:inline-flex;align-items:center;justify-content:center}
}

/* ==========================================================================
   Footer
   ========================================================================== */
footer{
  background:#08172C;
  color:#c5d1e1;
  padding:62px 0 24px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr repeat(3,1fr);
  gap:34px;
}
footer h4{color:#fff;margin-bottom:14px;font-size:1rem}
footer a{
  display:block;
  margin:8px 0;
  color:#b6c5d8;
  font-size:.9rem;
  transition:color .2s;
}
footer a:hover{color:#fff}
.footer-brand p{max-width:390px;margin-top:16px;color:#9fb0c6;font-size:.92rem}
.copyright{
  margin-top:40px;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,.1);
  display:flex;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
  font-size:.84rem;
  color:#8499b3;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero{
  position:relative;
  overflow:hidden;
  padding:88px 0 66px;
  background:
    radial-gradient(circle at 85% 15%, rgba(43,109,232,.12), transparent 28%),
    radial-gradient(circle at 70% 88%, rgba(198,40,40,.08), transparent 28%),
    linear-gradient(180deg,#fff 0%,#f8fbff 100%);
}
.hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(11,31,58,.028) 1px,transparent 1px),
    linear-gradient(90deg,rgba(11,31,58,.028) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:linear-gradient(to bottom,black,transparent);
  pointer-events:none;
}
.hero .container{position:relative;z-index:1}

/* Sub-hero (inner pages) */
.subhero{
  position:relative;
  overflow:hidden;
  padding:80px 0;
  background:
    radial-gradient(circle at 88% 10%,rgba(43,109,232,.14),transparent 28%),
    radial-gradient(circle at 70% 88%,rgba(198,40,40,.08),transparent 25%),
    linear-gradient(180deg,#fff,#f7faff);
}
.subhero::before{
  content:"";
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(11,31,58,.028) 1px,transparent 1px),
    linear-gradient(90deg,rgba(11,31,58,.028) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:linear-gradient(to bottom,black,transparent);
  pointer-events:none;
}
.subhero .container{position:relative;z-index:1}
.subhero h1{
  color:var(--navy);
  max-width:850px;
}
.subhero p{margin-top:18px;color:var(--muted);max-width:760px;font-size:1.08rem}

/* ==========================================================================
   Back to Top
   ========================================================================== */
#toTop{
  position:fixed;
  right:24px;bottom:24px;
  width:48px;height:48px;
  border-radius:50%;
  border:0;
  background:var(--navy);
  color:white;
  cursor:pointer;
  display:none;
  box-shadow:0 10px 25px rgba(11,31,58,.2);
  z-index:100;
  transition:var(--transition);
  font-size:1.1rem;
}
#toTop:hover{background:var(--blue);transform:translateY(-3px)}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media(max-width:700px){
  .section{padding:68px 0}
  .topbar-inner{justify-content:center;text-align:center}
  .topbar-inner span:last-child{display:none}
  .brand-text small{display:none}
  .brand-text strong{font-size:.82rem;white-space:normal}
  .section-head{align-items:flex-start;flex-direction:column}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .copyright{flex-direction:column;text-align:center}
}

@media(max-width:980px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}

@media(min-width:981px){
  .mobile-only{display:none !important}
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes fadeInUp{
  from{opacity:0;transform:translateY(24px)}
  to{opacity:1;transform:translateY(0)}
}
@keyframes fadeIn{
  from{opacity:0}
  to{opacity:1}
}
.animate-in{
  opacity:0;
  transform:translateY(24px);
  transition:opacity .6s ease,transform .6s ease;
}
.animate-in.visible{
  opacity:1;
  transform:translateY(0);
}