/* Tipografías */
@import url('https://fonts.googleapis.com/css2?family=Merriweather:wght@400;700&family=Montserrat:wght@400;600&display=swap');

:root{
  --bg:#05070d;
  --card:#0d111a;
  --text:#eaf4ff;
  --muted:#7a8ca3;
  --primary:#1e90ff;
  --secondary:#00bfff;
  --accent:#0077ff;
  --border:#1c2735;
}

*{box-sizing:border-box;margin:0;padding:0}
body{
  background:var(--bg);
  color:var(--text);
  font-family:'Merriweather', serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

/* Layout */
.header{padding:36px 20px;text-align:center}
.header .logo{height:56px;margin-bottom:12px}
.header h1{font-family:'Montserrat',sans-serif;font-size:2rem;font-weight:700;
  background:linear-gradient(90deg,var(--primary),var(--secondary));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:1px}
.subtitle{color:var(--muted);margin-top:8px;font-size:1rem}

.container{max-width:980px;margin:0 auto;padding:20px}

.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:12px;
  padding:20px;
  margin-bottom:18px;
  box-shadow:0 6px 30px rgba(0,191,255,0.06);
  transition:transform .18s ease,box-shadow .18s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:0 10px 40px rgba(30,144,255,0.08)}

.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}

.tile{
  background:#0a0f18;border:1px solid var(--border);border-radius:10px;padding:18px;text-align:center;
}
.tile h3{font-family:'Montserrat',sans-serif;margin-bottom:8px}
.note{color:var(--muted);margin-top:12px;font-size:.95rem}

/* Buttons */
.btn{
  padding:12px 18px;border:none;border-radius:10px;cursor:pointer;
  font-family:'Montserrat',sans-serif;font-weight:600;font-size:0.95rem;
  transition:all .16s ease;
}
.btn.primary{background:var(--primary);color:#fff;box-shadow:0 6px 18px rgba(30,144,255,0.12)}
.btn.primary:hover{background:var(--secondary)}
.btn.option{background:var(--accent);color:#fff}
.btn.option:hover{background:var(--secondary)}

/* Key box */
.key-box{
  font-family:'Montserrat',monospace;background:#07101a;padding:12px;border-radius:8px;text-align:center;font-weight:700;
  letter-spacing:2px;color:var(--text);
}

/* Footer */
.footer{text-align:center;padding:20px;color:var(--muted);border-top:1px solid var(--border);font-size:.9rem}

/* Hidden helper (contundente) */
.hidden{
  display:none!important;
  visibility:hidden!important;
  height:0!important;
  overflow:hidden!important;
}

/* Responsive tweaks */
@media (max-width:520px){
  .header h1{font-size:1.4rem}
  .grid{gap:12px}
  .card{padding:16px}
}