body {
      margin: 0;
      min-height: 100vh;
      background: linear-gradient(180deg, #0099ff, #0033cc);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: flex-start;
      text-align: center;
      color: white;
      font-family: Arial, sans-serif;
    }
    h1 { font-size: 2.5rem; margin-bottom: 0.5rem; }
    p  { margin-bottom: 2rem; }
    .btn {
      border: none;
      padding: 12px 24px;
      margin: 8px;
      font-size: 1rem;
      border-radius: 8px;
      cursor: pointer;
    }
    .btn-blue   { background: white; color: #0033cc; }
    .btn-yellow { background: #ffcc00; color: #003366; }
    .btn-outline { background: transparent; color: white; border: 2px solid white; }
    .btn:hover { opacity: 0.85; }



body.page-simulate{
    justify-content: flex-start;
    padding: 1.5rem 1rem 2rem;
}



.controls{
    max-width: 520px;
    width: 100%;
    padding: 1.25rem;
    margin-bottom: 1rem;
    background:rgba(255, 255, 255, 0.12);
    border-radius: 12px;
}
#display-plot{
    margin:0.75rem 0 1rem;
    font-size:1.1rem;
    font-weight:bold;
}
#plot{
    width:min(90vw, 1100px);
    height:500px;
}
.brand{
    font-size:2rem;
    font-weight:bold;
    margin-bottom: 0.25rem;
}
.tagline{
    margin-bottom:1rem;
    opacity:0.9;
}