:root{
  --bg:#ffffff;
  --fg:#0f2342;
  --muted:#5b6b89;
  --accent:#1f3666;
  --accent-2:#b2c4ff;
  --card:#f5f7fb;
  --border:#e2e8f0;
}
html[data-theme="dark"]{
  --bg:#0b1220;
  --fg:#e6edf7;
  --muted:#9fb0d0;
  --accent:#8cb4ff;
  --accent-2:#223b6a;
  --card:#0f1a2d;
  --border:#1f2a44;
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,'Helvetica Neue',Arial,sans-serif;background:var(--bg);color:var(--fg);line-height:1.6}
.container{max-width:1100px;margin:0 auto;padding:1rem}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.skip-link{position:absolute;left:-999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip-link:focus{left:1rem;top:1rem;width:auto;height:auto;background:#fff;color:#000;padding:.5rem 1rem;z-index:1000}
/* Header */
.site-header{position:sticky;top:0;background:var(--bg);border-bottom:1px solid var(--border);z-index:999}
.header-inner{display:flex;align-items:center;gap:1rem}
.brand{display:inline-flex;align-items:center}
.menu-toggle{margin-left:auto;border:1px solid var(--border);background:var(--card);padding:.4rem;border-radius:.5rem;display:none}
.menu-toggle span{display:block;width:22px;height:2px;background:var(--fg);margin:4px 0}
.site-nav ul{display:flex;gap:1rem;list-style:none;margin:0;padding:0}
.theme-toggle{margin-left:.5rem;border:1px solid var(--border);background:var(--card);padding:.4rem .6rem;border-radius:.5rem;cursor:pointer}
/* Footer */
.site-footer{background:var(--card);margin-top:2rem;border-top:1px solid var(--border)}
.footer-grid{display:grid;grid-template-columns:1fr auto;gap:1rem;align-items:start}
.footer-logo{height:42px;filter:grayscale(20%)}
.footer-menu{list-style:none;margin:0;padding:0;display:grid;gap:.4rem}
/* Cards & grid */
.grid{display:grid;gap:1rem}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.card{background:var(--card);border:1px solid var(--border);border-radius:.75rem;overflow:hidden}
.card .content{padding:1rem}
.card img{width:100%;display:block}
.badge{display:inline-block;padding:.2rem .5rem;border-radius:999px;background:var(--accent-2);color:var(--fg);font-size:.8rem}
.btn{display:inline-block;background:var(--accent);color:#fff;border-radius:.5rem;padding:.6rem 1rem;border:0}
.btn:hover{text-decoration:none;filter:brightness(1.05)}
.hero{display:grid;gap:1rem;align-items:center;padding:1rem;background:linear-gradient(120deg,var(--card),transparent 60%)}
.hero h1{margin:.3rem 0 0}
.hero p{margin:.2rem 0 1rem}
ul.clean{list-style: none; padding-left: 1rem}
ul.clean li{position:relative;margin:.4rem 0}
ul.clean li::before{content:"•";position:absolute;left:-1rem;color:var(--accent)}
/* Responsive */
@media (max-width: 840px){
  .menu-toggle{display:inline-block}
  .site-nav{position:absolute;top:64px;left:0;right:0;background:var(--bg);border-bottom:1px solid var(--border);display:none}
  .site-nav.open{display:block}
  .site-nav ul{flex-direction:column;padding:1rem}
  .grid-3{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
}
figure{margin:0}
h1,h2,h3{line-height:1.2}
.form-field{margin-bottom:1rem}
input,textarea{width:100%;padding:.7rem;border:1px solid var(--border);border-radius:.5rem;background:var(--bg);color:var(--fg)}
label{display:block;margin-bottom:.4rem;color:var(--muted)}
.alert{padding:.8rem 1rem;border-radius:.5rem;margin:1rem 0}
.alert.ok{background:#e6ffe9;border:1px solid #b6f2be}
.alert.err{background:#ffecec;border:1px solid #ffb3b3}
.small{font-size:.9rem;color:var(--muted)}