:root{
  --bs-primary:#1C4ED8;
  --bs-primary-600:#1941BE;
  --bs-primary-700:#15369E;

  --bs-secondary:#0EA5A5;
  --bs-secondary-600:#0C8E8E;
  --bs-secondary-700:#0A7575;

  --bs-success:#0E7C3A;
  --bs-warning:#B45309;
  --bs-danger:#B91C1C;
  --bs-info:#2563EB;

  --bs-dark:#0E2433;
  --bs-body:#1E2B36;
  --bs-muted:#687889;

  --bs-bg:#F6F8FC;
  --bs-card:#FFFFFF;
  --bs-border:#E4E9F2;
  --bs-shadow:0 6px 18px rgba(15,23,42,0.06);

  --link:#1C4ED8;
  --link-hover:#15369E;
  --focus:#71B6FF;

  --h1-color:#0E2F6B;
  --h2-color:#1747A6;
  --h3-color:#1E3A8A;
  --h4-color:#334E68;
  --h5-color:#6B7A88;
  --h6-color:#7F8B96;

  --tint-primary:#E7EEFF;
  --tint-secondary:#E6FAF8;
  --tint-success:#E8F6EE;
  --tint-warning:#FFF3E6;
  --tint-danger:#FDEBED;
  --tint-info:#E9F2FF;

  --space-1:8px;
  --space-2:12px;
  --space-3:16px;
  --space-4:20px;
  --space-5:24px;
  --space-6:28px;
  --space-7:36px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:var(--bs-bg);
  color:var(--bs-body);
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,Ubuntu,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
  font-size:17px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
a{color:var(--link);text-decoration:underline}
a:hover{color:var(--link-hover);text-decoration:underline}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}

.container{max-width:1200px;margin:0 auto;padding:0 var(--space-3)}
.navbar{
  background:#fff;
  border-bottom:1px solid var(--bs-border);
  padding:var(--space-2) 0
}
.brand img{display:block}
.navbar .container{display:flex;align-items:center;gap:var(--space-2)}
.navbar-nav{display:flex;gap:var(--space-2);align-items:center;margin-left:auto}
.navbar .nav-link{
  display:block;padding:8px 12px;border-radius:10px;color:var(--bs-dark)
}
.navbar .nav-link:hover{background:var(--tint-primary)}
.navbar .navbar-toggler{
  margin-left:auto;border:1px solid var(--bs-border);border-radius:10px;
  background:#fff;padding:8px 10px
}
.collapse{display:none}
.collapse.show{display:block}
@media(min-width:900px){
  .navbar .navbar-toggler{display:none}
  .collapse{display:block !important}
}

.card{
  background:var(--bs-card);
  border:1px solid var(--bs-border);
  border-radius:16px;
  box-shadow:var(--bs-shadow);
  margin-bottom:var(--space-5)
}
.card-body{padding:var(--space-5)}
@media(min-width:1200px){
  .card>.card-body{max-width:900px;margin:0 auto}
}

.badge{
  display:inline-block;background:var(--tint-secondary);color:#0F6E5E;
  border:1px solid #CBEAE3;border-radius:999px;font-size:.82rem;padding:4px 10px
}
.kwd-pill{
  display:inline-block;background:#F1F5F9;border-radius:999px;
  padding:8px 12px;margin:8px 8px 0 0;font-size:.92rem
}

.btn{display:inline-block;cursor:pointer;border:1px solid transparent;border-radius:12px;padding:10px 14px;font-weight:700;letter-spacing:.2px}
.btn-primary{background:var(--bs-primary);color:#fff}
.btn-primary:hover{background:var(--bs-primary-600)}
.btn-primary:active{background:var(--bs-primary-700)}
.btn-outline{
  background:transparent;border-color:var(--bs-border);color:var(--bs-dark)
}
.btn-outline:hover{border-color:var(--bs-primary);color:var(--bs-primary);background:var(--tint-primary)}

.lead{font-size:1.12rem;color:#394958;margin-bottom:var(--space-3)}
.footer{margin-top:var(--space-7);padding:var(--space-6) 0;border-top:1px solid var(--bs-border);color:var(--bs-muted)}
.row{display:flex;flex-wrap:wrap;margin-left:-12px;margin-right:-12px;row-gap:var(--space-3)}
.col{padding-left:12px;padding-right:12px;flex:1 0 0%;min-width:260px}

.breadcrumb{font-size:.96rem;color:#8a98a6;margin-bottom:var(--space-3)}
.breadcrumb a{color:inherit}
@media (max-width:576px){
  .breadcrumb{font-size:0;margin-bottom:var(--space-2);color:#9aa7b3}
  .breadcrumb a,.breadcrumb span{display:none}
  .breadcrumb a:first-of-type,.breadcrumb span:last-of-type{display:inline;font-size:.92rem;color:#7d8a97}
}

.toc{background:#fff;border:1px solid var(--bs-border);border-radius:12px;padding:0}
.toc .card-body{padding:var(--space-4)}
.toc h2{margin:0 0 var(--space-2) 0;font-size:1.05rem;border-bottom:1px solid var(--bs-border);padding-bottom:6px}
.toc .list-group{display:grid;grid-template-columns:1fr;gap:12px;padding-left:0;margin:0}
.toc .list-group .list-group-item{
  margin:0;border:1px solid #E1E8F0;border-radius:16px;padding:14px 16px;background:#fff;
  box-shadow:0 1px 2px rgba(15,23,42,0.04);
  transition:transform .06s ease, box-shadow .12s ease, border-color .12s ease
}
.toc .list-group .list-group-item:hover{
  transform:translateY(-1px);border-color:#D4E2F2;
  box-shadow:0 4px 10px rgba(15,23,42,0.06)
}
.toc .list-group .list-group-item>a{
  display:block;width:100%;color:var(--h2-color);font-weight:700;line-height:1.35;word-break:break-word;hyphens:auto;text-decoration:none
}
.toc .list-group .list-group-item>a:focus,
.toc .list-group .list-group-item>a:hover{text-decoration:none;color:var(--h1-color)}
@media(min-width:480px){.toc .list-group{grid-template-columns:repeat(2,1fr)}}
@media(min-width:900px){.toc .list-group{grid-template-columns:repeat(3,1fr);gap:14px}}

.product-cards .card{border:1px solid var(--bs-border)}
.product-cards h3{margin-top:0}

.hero{
  background:linear-gradient(120deg,#F2F6FF,#F6F8FC);
  border:1px solid var(--bs-border);border-radius:16px;
  padding:var(--space-6);display:flex;align-items:center;justify-content:space-between;gap:var(--space-3)
}
.hero h1{margin:0 0 var(--space-2) 0}
.hero p{margin:0 0 10px 0}

h1,h2,h3,h4,h5,h6{margin-top:1.4em;margin-bottom:.55em;line-height:1.25;letter-spacing:.2px}
h1{color:var(--h1-color);font-weight:800;font-size:clamp(1.9rem,2.6vw,2.3rem)}
h2{color:var(--h2-color);font-weight:700;font-size:clamp(1.45rem,2vw,1.75rem);padding-bottom:6px;border-bottom:1px solid var(--bs-border)}
h3{color:var(--h3-color);font-weight:700;font-size:1.16rem}
h4{color:var(--h4-color);font-weight:600}
h5{color:var(--h5-color);font-weight:600}
h6{color:var(--h6-color);font-weight:600}
h1 { margin-top: 0; }

figure{margin:0 0 var(--space-5)}
figcaption{margin-top:6px}
p{margin:0 0 var(--space-3)}
ul,ol{margin:0 0 var(--space-3) var(--space-4);padding:0}
li{margin-bottom:8px}

@media (max-width:576px){
  .card-body{padding:calc(var(--space-4) + 2px)}
  .lead{margin-bottom:var(--space-3)}
  h2{margin-top:1.2em}
}