.intro-stack{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:0;
}

.intro-stack-card{
  position:relative;
  overflow:hidden;
  border:1px solid rgba(0,209,224,.32);
  border-radius:18px;
  background:#172332;
  box-shadow:0 18px 34px rgba(0,0,0,.22), 0 0 0 1px rgba(0,209,224,.08), 0 0 28px rgba(0,209,224,.08);
  padding:18px;
  background-clip:padding-box;
}

[data-theme="light"] .intro-stack-card{
  background:#eefbfe;
  border-color:rgba(11,141,151,.58);
  box-shadow:0 14px 28px rgba(11,141,151,.08), 0 10px 24px rgba(15,23,42,.05);
}

.intro-media{
  position:relative;
  border-radius:14px;
  overflow:hidden;
}

.video-card{
  background:#0f172a;
  border:none;
  border-radius:14px;
  overflow:hidden;
  position:relative;
  aspect-ratio:16/9;
  box-shadow:none;
}

.video-card--interactive{
  width:100%;
  padding:0;
  cursor:pointer;
}

.video-card--player{
  width:100%;
}

.video-card__player{
  position:relative;
  width:100%;
  height:100%;
  background:#020617;
}

.video-card__player iframe,
.video-card__player video{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  display:block;
  border:0;
  background:#020617;
}

.video-card__player video{
  object-fit:cover;
}

.video-card__poster{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  display:block;
  padding:0;
  border:0;
  background:#020617;
  cursor:pointer;
  color:inherit;
}

.video-card__poster .video-bg{
  position:absolute;
  inset:0;
  background:
    linear-gradient(180deg, rgba(7,10,18,.08) 0%, rgba(7,10,18,.30) 100%),
    radial-gradient(circle at center, rgba(0,209,224,.12), transparent 56%);
}

.video-card__poster:focus-visible{
  outline:2px solid rgba(0,209,224,.92);
  outline-offset:-4px;
}

.video-card--interactive:focus-visible{
  outline:2px solid rgba(0,209,224,.92);
  outline-offset:4px;
}

.video-image{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}

.video-bg{
  position:relative;
  width:100%;
  height:100%;
  background:
    linear-gradient(180deg, rgba(7,10,18,.10) 0%, rgba(7,10,18,.26) 100%),
    radial-gradient(circle at center, rgba(255,255,255,.02), transparent 60%);
}

.play-btn{
  position:absolute;
  top:50%;
  left:50%;
  transform:translate(-50%,-50%);
  width:82px;
  height:82px;
  border-radius:50%;
  background:rgba(255,255,255,.94);
  color:var(--dark);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:28px;
  box-shadow:0 18px 34px rgba(0,0,0,.22);
  transition:transform .2s ease, box-shadow .2s ease;
}

.video-card--interactive:hover .play-btn{
  transform:translate(-50%,-50%) scale(1.05);
  box-shadow:0 22px 38px rgba(0,0,0,.28);
}

.hero-card{
  background:transparent;
  border:none;
  border-top:1px solid rgba(0,209,224,.20);
  border-radius:0;
  box-shadow:none;
  padding:24px 0 28px;
  margin-top:16px;
}

[data-theme="light"] .hero-card{
  background:transparent;
  border-color:rgba(11,141,151,.58);
  box-shadow:none;
}

.hero-titulo{
  font-size:26px;
  font-weight:700;
  line-height:1.3;
  color:var(--text);
  margin:0 0 12px;
}

.hero-description{
  font-size:17px;
  line-height:1.84;
  color:var(--muted);
  margin-bottom:18px;
  font-weight:400;
}

.hero-proof-row{
  display:flex;
  align-items:center;
  gap:14px;
  flex-wrap:wrap;
  padding-top:18px;
  margin-top:18px;
  border-top:1px solid var(--line);
}

.hero-proof-rating{
  display:inline-flex;
  align-items:center;
  gap:10px;
}

.hero-proof-rating strong{
  font-size:16px;
  line-height:1;
  color:var(--text);
  font-weight:700;
}

.hero-proof-stars{
  display:inline-flex;
  align-items:center;
  gap:4px;
  font-size:12px;
  color:#f4b400;
}

.hero-proof-link,
.hero-proof-students,
.hero-proof-author{
  color:var(--text);
  font-size:14px;
  font-weight:500;
}

.hero-proof-link{
  color:var(--accent);
}

.hero-proof-author{
  color:var(--muted);
  display:inline-flex;
  align-items:center;
  gap:6px;
  margin-left:auto;
  text-align:right;
}

.hero-proof-author strong{
  color:var(--accent);
  font-weight:700;
}

.hero-facts{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:12px 16px;
  margin-bottom:22px;
}

.hero-fact{
  display:flex;
  align-items:flex-start;
  gap:10px;
  padding:0;
  border:none;
  background:transparent;
}

.hero-fact i{
  color:var(--accent);
  margin-top:4px;
  font-size:13px;
}

.hero-fact span{
  display:flex;
  flex-direction:column;
  gap:1px;
  color:var(--text);
  font-size:14px;
  font-weight:400;
  line-height:1.45;
}

.hero-fact strong{
  color:var(--muted);
  font-size:10px;
  font-weight:800;
  letter-spacing:.06em;
  text-transform:uppercase;
}

.meta-pills{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:12px 16px;
}

.meta-pills span{
  display:flex;
  align-items:flex-start;
  gap:8px;
  padding:0;
  border-radius:0;
  background:transparent;
  border:none;
  font-size:14px;
  font-weight:500;
  color:var(--text);
  line-height:1.5;
  min-width:0;
}

.meta-pills i{
  color:var(--accent);
  margin-top:3px;
  font-size:13px;
}

@media (max-width:768px){
  .hero-card{ padding:20px 0 22px; }
  .hero-description{ font-size:16px; }
  .hero-proof-row{
    gap:10px 12px;
  }
  .hero-proof-link,
  .hero-proof-students,
  .hero-proof-author{
    font-size:13px;
  }
  .hero-proof-author{
    margin-left:0;
    text-align:left;
  }
  .hero-facts{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .meta-pills{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .hero-fact{
    min-width:0;
  }
  .hero-fact span{
    font-size:13px;
  }
  .hero-fact strong{
    font-size:10px;
  }
  .play-btn{
    width:72px;
    height:72px;
    font-size:24px;
  }
}

@media (max-width:560px){
  .hero-facts{
    grid-template-columns:1fr;
  }
  .meta-pills{
    grid-template-columns:1fr;
  }
}