body {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    padding: 0;
    margin: 0;
    height: 100vh;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

nav {
  height: 72px;
  background: rgba(15, 23, 42, 0.95);  /* slate-900 glass */
  backdrop-filter: blur(20px);
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

#logo {
      font-size: 24px;
  font-weight: 800;
  color: #ffffff;
}

.btn {
    color: white;
    font-weight: 800;
    background: #3a59ac;
    border-radius: 8px;
    border: none;
    height: 42px;
    cursor: pointer;
}

.btn_ins {
    color: white;
    font-weight: 800;
    background-color: #0f172a;
    border-radius: 8px;
    border: none;
    height: 42px;
    cursor: pointer;
}

#GVP {
    text-align: center;
    background-color: white;
    color: black;
    width: 40%;
    height: 300px;
    border-radius: 10px;
    box-shadow: 2px 2px 2px #254399;
}

#content {
    display: flex;
    align-items: center;
    flex-direction: column;
    color:white;
}

#content_case {
    width: 50%;
    display: flex;
    justify-content: space-around;
}