/* Estilos base */
:root{
  --bg: #fff;
  --text: #111;
  --muted: #666;
  --accent: #0b6efd;
  --card: #f7f9fc;
  --radius: 10px;
}
html {
  scroll-behavior: smooth;
}
:root[data-theme='dark']{
  --bg: #0b0f14;
  --text: #e6eef8;
  --muted: #9fb0c9;
  --accent: #61a6ff;
  --card: #071025;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background:var(--bg);
  color:var(--text);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.5;
}
.container{max-width:1000px;margin:0 auto;padding:1rem}
.site-header{border-bottom:1px solid rgba(0,0,0,0.06);background:linear-gradient(180deg,transparent,rgba(0,0,0,0.01));}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:1rem 0}
.brand{display:flex;gap:0.75rem;align-items:center}
.brand svg{color:var(--accent)}
.brand img.logo{height:50px;width:auto;object-fit:contain}
.brand h1{font-size:1.05rem;margin:0}
.nav .btn{margin-left:0.5rem}
.hero{padding:2rem 0;text-align:left}
.hero h2{margin:0 0 0.5rem;font-size:1.6rem}
.lead{color:var(--muted);margin:0 0 1rem}
.hero-ctas{display:flex;gap:0.5rem}
.btn{display:inline-block;padding:0.55rem 0.8rem;border-radius:8px;border:1px solid transparent;background:var(--card);color:var(--text);cursor:pointer}
.btn.small{padding:0.25rem 0.5rem;border-radius:6px}
.btn.primary{background:var(--accent);color:white}
.btn:focus{outline:3px solid rgba(11,110,253,0.18)}
:root[data-theme='dark'] .filter-btn{border-color:rgba(255,255,255,0.1)}
:root[data-theme='dark'] .btn{color:var(--text)}
.controls{display:flex;gap:1rem;align-items:center;flex-wrap:wrap;padding:1rem 0}
.filter-buttons{display:flex;gap:0.4rem;flex-wrap:wrap}
.filter-btn{padding:0.35rem 0.6rem;border-radius:6px;border:1px solid rgba(0,0,0,0.06);background:var(--card);cursor:pointer;color: var(--text);}
.filter-btn.active{box-shadow:inset 0 -2px 0 rgba(0,0,0,0.04);border-color:var(--accent)}
.search input{padding:0.5rem;border-radius:8px;border:1px solid rgba(0,0,0,0.08);min-width:200px}
:root[data-theme='dark'] .search input{background:var(--card);color:var(--text);border-color:rgba(255,255,255,0.1)}
.tips{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1rem;padding:1rem 0}
.tip-card{background:var(--card);padding:1rem;border-radius:var(--radius);box-shadow:0 6px 18px rgba(11,110,253,0.03)}
.tip-card h3{margin:0 0 0.5rem;font-size:1.05rem}
.tip-card .excerpt{color:var(--muted);margin:0 0 0.75rem}
.tip-card details summary{cursor:pointer;font-weight:600;margin-bottom:0.5rem}
.tip-card details p{margin:0 0 0.5rem}
.tip-card .copy{background:transparent;border:1px solid rgba(0,0,0,0.06);padding:0.4rem 0.6rem;border-radius:6px}
.subscribe{margin:2rem 0;padding:1rem;border-radius:12px;background:linear-gradient(180deg,rgba(11,110,253,0.04),transparent)}
.subscribe form{display:flex;gap:0.5rem;flex-wrap:wrap;align-items:center}
.subscribe input[type=email]{padding:0.6rem;border-radius:8px;border:1px solid rgba(0,0,0,0.08);min-width:220px}
.site-footer{border-top:1px solid rgba(0,0,0,0.06);padding:1rem 0;margin-top:2rem;color:var(--muted)}
.small{font-size:0.85rem;color:var(--muted)}
@media (max-width:600px){
  .header-inner{flex-direction:column;align-items:flex-start;gap:0.5rem}
  .hero h2{font-size:1.25rem}
}
/* small helper */
.hidden{display:none!important}
.visually-hidden{position:absolute;left:-10000px;top:auto;width:1px;height:1px;overflow:hidden}