/* --- Responsive header & cards improvements (added by assistant) --- */

:root{
  --header-height:72px;
  --container-width:90%;
  --max-container:1200px;
}

/* Basic reset for predictable layout */
*,
*::before,
*::after{box-sizing:border-box}
html,body{margin:0;padding:0;-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent;font-family:inherit;color:inherit}
.container{width:var(--container-width);max-width:var(--max-container);margin:0 auto;padding:0 1rem}

/* Header */
.site-header{position:sticky;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,0.85);backdrop-filter:blur(6px);border-bottom:1px solid rgba(0,0,0,0.04)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;padding:0.5rem 0}
.logo{display:flex;align-items:center;gap:0.5rem;font-weight:700}
.menu-toggle{display:none;background:none;border:0;font-size:1.5rem;padding:0.25rem 0.5rem;cursor:pointer}
.site-nav ul{display:flex;gap:1.25rem;list-style:none;margin:0;padding:0;align-items:center}
.site-nav a{text-decoration:none;color:inherit;padding:0.35rem 0.5rem;border-radius:6px;display:inline-block}
.site-nav a:focus-visible{outline:3px solid rgba(0,123,255,0.25);outline-offset:3px}

/* Mobile menu */
@media (max-width: 900px){
  .menu-toggle{display:block}
  .site-nav{position:absolute;top:100%;right:0;left:0;background:rgba(255,255,255,0.98);max-height:0;overflow:hidden;transition:max-height .28s ease,box-shadow .28s ease}
  .site-nav.open{max-height:420px;box-shadow:0 8px 30px rgba(0,0,0,0.12)}
  .site-nav ul{flex-direction:column;gap:0;padding:0.5rem 1rem}
  .site-nav a{display:block;width:100%;text-align:center;padding:0.75rem 0;margin:0}
}

/* Cards grid */
.cards{display:grid;gap:1rem;padding:1rem;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.card{background:#fff;border-radius:12px;overflow:hidden;display:flex;flex-direction:column;height:100%;box-shadow:0 8px 20px rgba(0,0,0,0.06);transition:transform .22s ease,box-shadow .22s ease}
.card:hover{transform:translateY(-6px);box-shadow:0 12px 36px rgba(0,0,0,0.08)}
.card img{width:100%;height:180px;object-fit:cover;display:block}
.card .card-body{padding:1rem;flex:1 1 auto}
.card .card-footer{padding:0.75rem 1rem;border-top:1px solid rgba(0,0,0,0.04)}

/* accessibility and touch space */
button, .menu-toggle, .site-nav a{touch-action:manipulation}
:focus{outline-offset:3px}

/* small tweaks for very small screens */
@media (max-width:420px){
  .card img{height:140px}
  .site-header .container{padding:0.5rem 0.75rem}
}