:root{
  --bg:#0a0b12; --card:#151827; --line:#232741;
  --text:#eef0f7; --muted:#9aa0b5; --accent:#8b5cf6; --accent2:#ec4899;
  --header-bg:rgba(10,11,18,.72);
}
[data-theme="light"]{
  --bg:#f6f7fb; --card:#ffffff; --line:#e6e8f0;
  --text:#12141f; --muted:#5a6172; --accent:#7c3aed; --accent2:#db2777;
  --header-bg:rgba(255,255,255,.78);
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  background:var(--bg); color:var(--text); line-height:1.6;
  font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  -webkit-font-smoothing:antialiased;
  transition:background .35s ease, color .35s ease;
}
a{color:inherit;text-decoration:none}
.container{max-width:1120px;margin:0 auto;padding:0 24px}

/* Header */
.header{position:sticky;top:0;z-index:50;display:flex;align-items:center;
  justify-content:space-between;padding:16px 24px;background:var(--header-bg);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line);
  transition:background .35s ease,border-color .35s ease}
.logo{font-weight:800;font-size:20px;
  background:linear-gradient(90deg,var(--accent),var(--accent2));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text}
.nav{display:flex;align-items:center;gap:20px}
.nav a{font-size:14px;font-weight:500;color:var(--muted);transition:color .2s}
.nav a:hover{color:var(--text)}
.theme-btn{background:transparent;border:1px solid var(--line);color:var(--text);
  border-radius:10px;padding:8px 12px;cursor:pointer;font-size:16px;
  transition:border-color .2s,transform .15s}
.theme-btn:hover{border-color:var(--accent);transform:scale(1.05)}

/* Hero */
.hero{text-align:center;padding:80px 0 60px}
.hero h1{font-size:clamp(38px,6vw,68px);font-weight:800;line-height:1.1;margin-bottom:20px}
.hero h1 span{
  background:linear-gradient(90deg,var(--accent),var(--accent2));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:18px;color:var(--muted);max-width:560px;margin:0 auto 32px}

/* Grid */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px;padding-bottom:80px}

/* Card */
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;
  overflow:hidden;transition:transform .2s,border-color .2s,box-shadow .3s;display:block}
.card:hover{transform:translateY(-6px);border-color:var(--accent);
  box-shadow:0 20px 40px -20px rgba(139,92,246,.6)}
.thumb{aspect-ratio:4/3;position:relative;overflow:hidden;background:var(--line)}
.thumb img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s ease}
.card:hover .thumb img{transform:scale(1.05)}
.card-body{padding:20px}
.card-body h3{font-size:18px;font-weight:700;margin-bottom:6px}
.card-body p{font-size:14px;color:var(--muted);line-height:1.5}
.tag{display:inline-block;font-size:12px;font-weight:600;padding:4px 10px;
  border-radius:8px;background:rgba(139,92,246,.15);color:var(--accent);margin-top:10px}

/* Footer */
.footer{text-align:center;padding:40px 0;font-size:13px;color:var(--muted);
  border-top:1px solid var(--line)}

/* Page transition */
.page{animation:enter .45s cubic-bezier(.22,1,.36,1) both}
@keyframes enter{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* Responsive */
@media(max-width:720px){
  .hero{padding:50px 0 40px}
  .hero h1{font-size:32px}
  .grid{grid-template-columns:1fr}
  .header{padding:12px 16px}
  .container{padding:0 16px}
}