/* --- Base background inspired by your previous dark/gradient glass style --- */
:root{
  --msim-bg-1: #141414;
  --msim-bg-2: #2b2b2b;
  --msim-bg-3: #1a1a1a;

  --msim-glass: rgba(0, 0, 0, 0.72);
  --msim-border: rgba(255, 255, 255, 0.12);
  --msim-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);

  --msim-btn-instructor-1: #5a5a5a;
  --msim-btn-instructor-2: #2f2f2f;

  --msim-btn-monitor-1: #4a4a4a;
  --msim-btn-monitor-2: #1f1f1f;
}

.msim-body{
  min-height: 100vh;
  color: #fff;
  background: linear-gradient(135deg, var(--msim-bg-1) 0%, var(--msim-bg-2) 50%, var(--msim-bg-3) 100%);
  display: flex;
  align-items: center;
}

/* Glass shell */
.msim-shell{
  max-width: 980px;
  padding: 2.5rem;
  background: var(--msim-glass);
  border: 1px solid var(--msim-border);
  border-radius: 16px;
  box-shadow: var(--msim-shadow);
  backdrop-filter: blur(10px);
}

/* Simple logo */
.msim-logo{
  font-size: 3.25rem;
  line-height: 1;
}

/* Feature cards */
.msim-card{
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: 12px;
  padding: 1.25rem;
  transition: transform .18s ease, background .18s ease, border-color .18s ease;
}

.msim-card:hover{
  transform: translateY(-3px);
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.14);
}

/* Buttons with subtle shine */
.msim-btn{
  position: relative;
  overflow: hidden;
  min-width: 230px;
  padding: 1rem 1.25rem;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.18);
  box-shadow: 0 8px 22px rgba(0,0,0,0.35);
  font-weight: 700;
  color: #fff;
}

.msim-btn::before{
  content: "";
  position: absolute;
  inset: 0;
  transform: translateX(-120%);
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.22), transparent);
  transition: transform .55s ease;
}

.msim-btn:hover::before{
  transform: translateX(120%);
}

.msim-btn:hover{
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(0,0,0,0.45);
}

.msim-btn-instructor{
  background: linear-gradient(145deg, var(--msim-btn-instructor-1), var(--msim-btn-instructor-2));
}

.msim-btn-monitor{
  background: linear-gradient(145deg, var(--msim-btn-monitor-1), var(--msim-btn-monitor-2));
}

/* Responsive tweaks */
@media (max-width: 768px){
  .msim-shell{
    padding: 1.5rem;
  }
  .msim-btn{
    width: 100%;
    min-width: 0;
  }
}