/* Modern Technology Website V3.3 - Presentation Library */
.presentation-hero{
  padding-top:120px;
  padding-bottom:48px;
  background:
    radial-gradient(circle at 80% 15%,rgba(12,103,194,.13),transparent 30%),
    linear-gradient(180deg,#f8fbff,#fff);
}
.presentation-hero h1,
.presentation-view-head h1{
  max-width:880px;
  margin:8px 0 14px;
  font-size:clamp(34px,5vw,58px);
  line-height:1.08;
  color:#082f5b;
}
.presentation-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.presentation-card{
  background:#fff;
  border:1px solid #dfe7f0;
  border-radius:18px;
  overflow:hidden;
  box-shadow:0 12px 32px rgba(8,47,91,.06);
  transition:.18s ease;
}
.presentation-card:hover{
  transform:translateY(-3px);
  box-shadow:0 16px 36px rgba(8,47,91,.10);
}
.presentation-cover{
  display:block;
  height:230px;
  background:#eef4fa;
  overflow:hidden;
}
.presentation-cover>img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.presentation-cover-placeholder{
  height:100%;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:14px;
  background:
    linear-gradient(135deg,rgba(6,43,85,.98),rgba(10,91,164,.92));
  color:#fff;
}
.presentation-cover-placeholder img{
  width:130px;
  max-height:80px;
  object-fit:contain;
  filter:brightness(0) invert(1);
}
.presentation-cover-placeholder span{
  font-size:12px;
  letter-spacing:2.5px;
  font-weight:700;
}
.presentation-card-body{padding:22px}
.presentation-card-body h2{
  color:#082f5b;
  font-size:21px;
  margin:0 0 9px;
}
.presentation-card-body p{
  color:#65778b;
  line-height:1.8;
  min-height:54px;
}
.presentation-actions{
  display:flex;
  flex-wrap:wrap;
  gap:9px;
  margin-top:18px;
}
.presentation-actions .btn{
  display:inline-flex;
  align-items:center;
  gap:7px;
}
.presentation-empty{
  grid-column:1/-1;
  background:#fff;
  border:1px dashed #cbd9e7;
  border-radius:14px;
  padding:38px;
  color:#64748b;
  text-align:center;
}
.presentation-view-page{
  background:#f5f8fb;
  min-height:100vh;
}
.presentation-view-head{
  padding-top:118px;
  padding-bottom:32px;
  background:#fff;
}
.presentation-document-section{
  padding:28px 0 60px;
}
.pdf-frame-shell{
  background:#1f2937;
  border-radius:16px;
  padding:8px;
  box-shadow:0 14px 35px rgba(0,0,0,.10);
}
.pdf-frame-shell iframe{
  display:block;
  width:100%;
  height:min(78vh,900px);
  min-height:650px;
  border:0;
  border-radius:10px;
  background:#fff;
}
.presentation-nav-simple{
  display:flex;
  align-items:center;
  gap:18px;
}
.home-presentation-section{
  position:relative;
  overflow:hidden;
}
.home-presentation-card{
  display:grid;
  grid-template-columns:minmax(0,1.1fr) minmax(320px,.9fr);
  background:#fff;
  border:1px solid #dde7f1;
  border-radius:22px;
  overflow:hidden;
  box-shadow:0 14px 35px rgba(8,47,91,.07);
}
.home-presentation-copy{
  padding:40px;
  display:flex;
  flex-direction:column;
  justify-content:center;
}
.home-presentation-copy h3{
  color:#082f5b;
  font-size:32px;
  margin:8px 0 12px;
}
.home-presentation-copy p{
  color:#65778b;
  line-height:1.9;
}
.home-presentation-visual{
  min-height:340px;
  background:linear-gradient(135deg,#072b55,#0d6ab9);
}
.home-presentation-visual img{
  width:100%;
  height:100%;
  min-height:340px;
  object-fit:cover;
  display:block;
}
.home-presentation-visual.placeholder{
  display:flex;
  align-items:center;
  justify-content:center;
}
.home-presentation-visual.placeholder img{
  width:170px;
  height:auto;
  min-height:0;
  object-fit:contain;
  filter:brightness(0) invert(1);
}
@media(max-width:980px){
  .presentation-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .home-presentation-card{grid-template-columns:1fr}
  .home-presentation-visual{min-height:260px}
}
@media(max-width:650px){
  .presentation-grid{grid-template-columns:1fr}
  .presentation-cover{height:210px}
  .pdf-frame-shell iframe{min-height:520px;height:72vh}
  .home-presentation-copy{padding:26px}
  .home-presentation-copy h3{font-size:26px}
}