:root{
  --bg: #f7f8fb;
  --card-bg: #ffffff;
  --text: #0f1724;
  --muted: #4b5563;
  --accent: #2563eb;
  --card-border: rgba(15,23,36,0.06);
  --focus: rgba(37,99,235,0.25);
  --glass: rgba(255,255,255,0.6);
  --radius: 12px;
  --container-padding: 16px;
  --shadow: 0 6px 18px rgba(11,17,28,0.06);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  line-height: 1.35;
  font-size: 16px;
}

/* Respect system dark mode */
@media (prefers-color-scheme: dark){
  :root{
    --bg: #071226;
    --card-bg: rgba(255,255,255,0.03);
    --text: #e6eef8;
    --muted: #98a6b8;
    --accent: #4f9cff;
    --card-border: rgba(255,255,255,0.06);
    --glass: rgba(255,255,255,0.03);
    --shadow: none;
  }
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:linear-gradient(180deg,var(--bg),color-mix(in srgb, var(--bg) 90%, transparent));
  color:var(--text);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

.container{
  max-width:1040px;
  margin:0 auto;
  padding:24px var(--container-padding);
}

.skip{
  position:absolute;
  left:-999px;
  top:auto;
  width:1px;
  height:1px;
  overflow:hidden;
}
.skip:focus{
  left:12px;
  top:12px;
  width:auto;
  height:auto;
  background:var(--card-bg);
  padding:8px;
  border-radius:6px;
  box-shadow:var(--shadow);
  z-index:100;
}

.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.brand .site-title{
  margin:0;
  font-size:1.3rem;
  letter-spacing: -0.02em;
}
.site-sub{margin:2px 0 0;color:var(--muted);font-size:0.95rem}

/* intro */
.intro{margin-top:18px;margin-bottom:18px}
.intro p{color:var(--muted);max-width:54ch}

/* grid / cards */
.grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(220px,1fr));
  gap:16px;
  margin-top:12px;
}
.card{
  display:flex;
  gap:12px;
  align-items:flex-start;
  padding:14px;
  background:var(--card-bg);
  border-radius:var(--radius);
  border:1px solid var(--card-border);
  text-decoration:none;
  color:inherit;
  box-shadow:var(--shadow);
  transition:transform .14s ease,box-shadow .14s ease;
}
.card:focus, .card:hover{
  transform:translateY(-6px);
  box-shadow: 0 12px 30px rgba(11,17,28,0.12);
  outline:none;
}
.card:focus{
  box-shadow: 0 12px 30px rgba(11,17,28,0.12), 0 0 0 4px var(--focus);
}

.card-icon{
  width:52px;
  height:52px;
  border-radius:10px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.45rem;
  background:linear-gradient(180deg,var(--glass),transparent);
  flex:0 0 52px;
  margin-top:2px;
}

.card-body{flex:1}
.card-title{margin:0 0 6px;font-size:1rem}
.card-desc{margin:0;color:var(--muted);font-size:0.94rem}
.card-tag{
  display:inline-block;
  margin-top:10px;
  padding:4px 8px;
  font-size:0.79rem;
  border-radius:999px;
  background:rgba(37,99,235,0.08);
  color:var(--accent);
}

/* footer */
.site-footer{margin:28px 0 40px;color:var(--muted);font-size:0.92rem}

/* small utilities */
.visually-hidden{
  position:absolute!important;
  height:1px;width:1px;overflow:hidden;
  clip:rect(1px,1px,1px,1px);white-space:nowrap;border:0;padding:0;margin:-1px;
}

.inline{background:rgba(0,0,0,0.04);padding:2px 6px;border-radius:6px;font-family:monospace;font-size:0.95em}
.muted{color:var(--muted);font-size:0.9rem}

/* Responsive tweaks */
@media (max-width:560px){
  .card{padding:12px}
  .card-icon{width:46px;height:46px;font-size:1.2rem}
}