body {
  margin: 0;
  font-family: monospace;
  background: #07070a;
  color: #00ff9d;
  overflow-x: hidden;
}

/* animated background grid */
.bg {
  position: fixed;
  width: 200%;
  height: 200%;
  background: linear-gradient(rgba(0,255,157,0.05) 1px, transparent 1px),
              linear-gradient(90deg, rgba(0,255,157,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  animation: move 20s linear infinite;
  z-index: -1;
}

@keyframes move {
  from { transform: translate(0,0); }
  to { transform: translate(-40px,-40px); }
}

/* layout */
.container {
  max-width: 850px;
  margin: auto;
  padding: 40px 20px;
}

/* top language switch */
.topbar {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-bottom: 20px;
}

.topbar a {
  color: #00ff9d55;
  text-decoration: none;
  border: 1px solid #00ff9d22;
  padding: 4px 10px;
  border-radius: 4px;
}

.topbar a.active {
  color: #00ff9d;
  border-color: #00ff9d66;
}

/* header */
h1 {
  font-size: 40px;
  letter-spacing: 5px;
}

.subtitle {
  color: #ffffff55;
  margin-bottom: 30px;
}

/* cards */
.card {
  border: 1px solid #00ff9d22;
  background: rgba(15,15,20,0.8);
  padding: 16px;
  margin-bottom: 16px;
  border-radius: 8px;
  transition: 0.2s;
}

.card:hover {
  border-color: #00ff9d66;
  transform: translateY(-2px);
}

h2 {
  font-size: 14px;
  letter-spacing: 2px;
}

/* links */
a {
  color: #00ff9d;
}

/* footer */
footer {
  margin-top: 40px;
  color: #ffffff33;
  font-size: 12px;
}

/* mobile */
@media (max-width: 600px) {
  h1 {
    font-size: 28px;
  }

  .container {
    padding: 20px;
  }

  .card {
    padding: 12px;
  }
}