.c420-ai-smart{
  --c420-accent:#5b8cff;
  --c420-bg:linear-gradient(180deg,#081326 0%,#0b1220 100%);
  --c420-card:#10192b;
  --c420-text:#f5f7fb;
  --c420-muted:#a7b2c9;
  color:var(--c420-text);
  background:var(--c420-bg);
  border:1px solid rgba(255,255,255,.08);
  border-radius:28px;
  padding:28px;
  box-shadow:0 20px 60px rgba(0,0,0,.25);
  overflow:hidden;
}
.c420-ai-smart--medical{
  --c420-bg:linear-gradient(180deg,#0d2940 0%,#14314b 100%);
  --c420-card:#173650;
}
.c420-ai-smart--dark{
  --c420-bg:linear-gradient(180deg,#0a0a0f 0%,#11131b 100%);
  --c420-card:#171925;
}
.c420-ai-smart__head{
  display:flex; gap:18px; align-items:flex-start; justify-content:space-between; flex-wrap:wrap;
  margin-bottom:22px;
}
.c420-ai-smart__heading h2{margin:0 0 8px; font-size:40px; line-height:1.05;}
.c420-ai-smart__heading p{margin:0; color:var(--c420-muted); max-width:780px;}
.c420-ai-smart__filters{
  display:flex; gap:10px; flex-wrap:wrap; align-items:center;
  background:rgba(255,255,255,.04); padding:8px; border-radius:999px;
}
.c420-ai-smart__filters button{
  border:0; background:transparent; color:var(--c420-text); padding:10px 16px; border-radius:999px; cursor:pointer;
}
.c420-ai-smart__filters button.is-active{
  background:linear-gradient(135deg,var(--c420-accent),#7f77ff); box-shadow:0 10px 30px rgba(91,140,255,.25);
}
.c420-ai-smart__viewall{
  color:#fff; text-decoration:none; padding:12px 16px; border:1px solid rgba(255,255,255,.12); border-radius:999px;
}
.c420-ai-smart__section{margin-top:18px;}
.c420-ai-smart__section-title{
  font-size:14px; letter-spacing:.12em; text-transform:uppercase; color:var(--c420-muted); margin-bottom:14px;
}
.c420-ai-smart__featured{
  display:grid; grid-template-columns:repeat(3,1fr); gap:20px;
}
.c420-ai-smart__track{
  display:grid; grid-auto-flow:column; grid-auto-columns:minmax(290px, 1fr);
  gap:20px; overflow-x:auto; padding-bottom:6px; scroll-snap-type:x mandatory;
}
.c420-card{
  background:linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
  border:1px solid rgba(255,255,255,.08);
  border-radius:24px;
  overflow:hidden;
  backdrop-filter: blur(14px);
  scroll-snap-align:start;
}
.c420-card--featured{min-height:100%;}
.c420-card__thumb{position:relative; display:block; aspect-ratio:16/10; overflow:hidden;}
.c420-card__thumb img,.c420-card__placeholder{
  width:100%; height:100%; object-fit:cover; display:block;
}
.c420-card__placeholder{background:linear-gradient(135deg,#18355d,#0d1830);}
.c420-card__tag{
  position:absolute; top:14px; left:14px;
  padding:8px 12px; border-radius:999px;
  font-size:12px; font-weight:700;
  background:linear-gradient(135deg,var(--c420-accent),#8e7bff);
  color:#fff;
}
.c420-card__body{padding:18px;}
.c420-card__title{margin:0 0 10px; font-size:28px; line-height:1.15;}
.c420-card__title a{color:#fff; text-decoration:none;}
.c420-card__meta{display:flex; gap:12px; color:var(--c420-muted); font-size:13px; margin-bottom:12px; flex-wrap:wrap;}
.c420-card__excerpt{margin:0 0 14px; color:#d7dceb; line-height:1.55;}
.c420-card__author{display:flex; align-items:center; gap:10px; font-weight:600;}
.c420-card__author-dot{
  width:10px; height:10px; border-radius:50%; background:var(--c420-accent); display:inline-block;
}
@media (max-width: 1024px){
  .c420-ai-smart__featured{grid-template-columns:1fr;}
  .c420-ai-smart__heading h2{font-size:34px;}
}
@media (max-width: 767px){
  .c420-ai-smart{padding:20px; border-radius:22px;}
  .c420-ai-smart__heading h2{font-size:28px;}
  .c420-card__title{font-size:24px;}
  .c420-ai-smart__track{grid-auto-columns:minmax(260px, 88vw);}
}