/* soyoukno9.com — lightweight, responsive, publication-style CSS (no framework) */
:root{
  --bg:#ffffff;
  --fg:#0f172a;       /* slate-900 */
  --muted:#475569;    /* slate-600 */
  --soft:#e2e8f0;     /* slate-200 */
  --accent:#0ea5e9;   /* sky-500 */
  --accent-2:#22c55e; /* green-500 */
  --card:#f8fafc;     /* slate-50 */
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,"Helvetica Neue",Arial,"Noto Sans","Apple Color Emoji","Segoe UI Emoji"; 
  color:var(--fg); background:var(--bg);
}
a{color:var(--fg); text-decoration:none}
a:hover{color:var(--accent)}
img{max-width:100%; display:block; height:auto}
.container{max-width:1100px; margin:0 auto; padding:0 20px}
.btn{display:inline-block; padding:10px 14px; border-radius:12px; border:1px solid var(--soft); background:#fff; transition:.2s}
.btn.primary{background:var(--accent); color:#fff; border-color:var(--accent)}
.btn.ghost{background:transparent}
.btn:hover{transform:translateY(-1px); box-shadow:0 6px 18px rgba(0,0,0,.07)}

header.site{
  position:sticky; top:0; z-index:50; background:rgba(255,255,255,.9); backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid var(--soft);
}
.nav{display:flex; align-items:center; justify-content:space-between; padding:12px 0}
.brand{display:flex; align-items:center; gap:10px}
.brand svg{width:30px; height:30px}
.brand-name{font-weight:800; letter-spacing:.2px; font-size:18px}
.navlinks{display:flex; gap:16px; align-items:center}
.navlinks a{padding:8px 10px; border-radius:10px}
.navlinks a.active, .navlinks a:hover{background:var(--card)}

.hero{
  padding:28px 0 18px; border-bottom:1px solid var(--soft);
}
.hero-grid{
  display:grid; gap:18px;
  grid-template-columns: 1.4fr .8fr;
}
.card{
  background:var(--card); border:1px solid var(--soft); border-radius:16px; overflow:hidden;
}
.card .pad{padding:16px}
.card h3{margin:.2rem 0 .4rem; line-height:1.25}
.meta{color:var(--muted); font-size:14px}
.tags{display:flex; gap:8px; flex-wrap:wrap; margin-top:8px}
.tag{font-size:12px; padding:6px 10px; border-radius:999px; border:1px solid var(--soft); background:#fff}
.grid{
  display:grid; gap:18px; grid-template-columns: repeat(3,1fr);
}
.section{padding:26px 0}
.section h2{margin:0 0 12px}
footer.site{
  margin-top:20px; padding:28px 0; border-top:1px solid var(--soft); background:#fff;
}
.footer-grid{display:grid; gap:18px; grid-template-columns:2fr 1fr 1fr}
.footer-col h4{margin:0 0 8px}
.small{font-size:14px; color:var(--muted)}
.input{padding:10px 12px; border:1px solid var(--soft); border-radius:12px; width:100%}
.form-row{display:flex; gap:10px}
.kicker{letter-spacing:.3px; text-transform:uppercase; font-size:12px; color:var(--muted)}
hr.soft{border:0; border-top:1px solid var(--soft); margin:16px 0}

/* Article */
.article .title{font-size:34px; line-height:1.2; margin:8px 0 8px}
.prose{color:#111827}
.prose p{margin:1em 0}
.prose h3{margin:1.2em 0 .4em}
.prose ul{padding-left:18px}
.share{display:flex; gap:10px; flex-wrap:wrap}

/* Responsive */
@media (max-width: 980px){
  .grid{grid-template-columns:1fr 1fr}
  .hero-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width: 640px){
  .navlinks{display:none}
  .grid{grid-template-columns:1fr}
  .form-row{flex-direction:column}
}