:root{
  --bg:#05060d;
  --panel:rgba(15, 23, 42, 0.55);
  --border:rgba(0, 255, 255, 0.25);

  --text:#e5f6ff;
  --muted:#8adfff;

  --accent:#00f5ff;
  --accent2:#7c3aed;
  --accent3:#ff2bd6;
}

*{
  box-sizing:border-box;
  font-family:system-ui, Segoe UI, Roboto, Arial;
}

body{
  margin:0;
  color:var(--text);
  min-height:100vh;

  /* wichtig für Bottom Nav */
  padding-bottom:80px;

  background:
    radial-gradient(circle at 20% 10%, rgba(0,245,255,0.15), transparent 40%),
    radial-gradient(circle at 80% 30%, rgba(124,58,237,0.18), transparent 45%),
    radial-gradient(circle at 50% 90%, rgba(255,43,214,0.10), transparent 50%),
    var(--bg);
}

/* NAV - FIXED BOTTOM */
nav{
  position:fixed;
  bottom:0;
  left:0;
  width:100%;

  display:flex;
  justify-content:space-around;
  align-items:center;

  padding:12px 10px;

  background:rgba(5,10,25,0.75);
  backdrop-filter: blur(14px);

  border-top:1px solid var(--border);
  z-index:1000;
}

nav a{
  color:var(--text);
  text-decoration:none;
  font-weight:600;
  letter-spacing:1px;
  font-size:0.9rem;

  transition:0.3s;
}

nav a:hover{
  color:var(--accent);
  text-shadow:0 0 10px var(--accent);
}

/* HEADER */
header{
  text-align:center;
  padding:30px 20px;
}

header h1{
  font-size:2.2rem;
  margin-bottom:1px;
  background:linear-gradient(90deg,var(--accent),var(--accent2),var(--accent3));
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  animation: glowText 4s infinite alternate;
}

header p{
  color:var(--muted);
}

/* GRID */
.container{
  max-width:1100px;
  margin:auto;
  padding:20px;

  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(260px, 1fr));
  gap:20px;
}

/* CARD */
.card{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:18px;
  padding:20px;

  backdrop-filter: blur(14px);
  transition:0.35s;
  position:relative;
  overflow:hidden;
}

.card::before{
  content:"";
  position:absolute;
  inset:-2px;
  background:linear-gradient(120deg, transparent, rgba(0,245,255,0.2), transparent);
  transform:translateX(-100%);
  transition:0.6s;
}

.card:hover::before{
  transform:translateX(100%);
}

.card:hover{
  transform:translateY(-6px);
  box-shadow:
    0 0 25px rgba(0,245,255,0.25),
    0 0 50px rgba(124,58,237,0.15);
  border-color:rgba(0,245,255,0.5);
}

/* BUTTON */
.btn{
  margin-top:auto;
  display:block;
  padding:10px 14px;
  border-radius:10px;

  text-align:center;
  text-decoration:none;
  color:white;
  font-weight:600;

  background:linear-gradient(135deg,var(--accent),var(--accent2));
  box-shadow:0 0 15px rgba(0,245,255,0.25);

  transition:0.3s;
}

.btn:hover{
  transform:scale(1.05);
  box-shadow:0 0 25px rgba(0,245,255,0.45);
}

/* GITHUB LINK */
.github-link {
  display: inline-block;
  margin-top: 12px;
  color: #f5e6a1;
  text-decoration: none;
  font-size: 0.95rem;
  transition: 0.2s ease;
}

.github-link:hover {
  color: #fff2b3;
  text-decoration: underline;
}

/* DOWNLOAD POPUP */
#downloadPopup {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.8);
  backdrop-filter: blur(6px);
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

#downloadPopup .box {
  background: #0f172a;
  padding: 25px;
  border-radius: 15px;
  text-align: center;
  color: white;
  border: 1px solid rgba(0,255,255,0.3);
}

/* ANIMATION */
@keyframes glowText{
  0%{ filter: drop-shadow(0 0 5px rgba(0,245,255,0.3)); }
  100%{ filter: drop-shadow(0 0 18px rgba(124,58,237,0.5)); }
}

/* MOBILE */
@media(max-width:768px){
  header h1{
    font-size:1.7rem;
  }

  nav{
    padding:10px 6px;
  }

  nav a{
    font-size:0.85rem;
  }
}