body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #0b142b;
  color: #fff;
  overflow-x: hidden;
}

/* 🔳 Arka Plan Grid */
.bg-grid {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  z-index: -2;
}
.bg-tile {
 background-size: cover;
  background-position: center;
  filter: brightness(80%) contrast(110%);
  transition: transform 10s ease, opacity 2s ease;
  animation: slowZoom 15s infinite alternate;
  opacity: 0.17; /* 🔹 Daha belirgin */
}
.bg-tile:hover {
  opacity: 0.4;
}
.bg-overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: linear-gradient(180deg, rgba(0,0,0,0.45), rgba(0,0,0,0.65)); /* 🔹 Daha şeffaf */
  backdrop-filter: blur(1.5px); /* 🔹 Blur azaltıldı */
  z-index: -1;
}

/* Hero */
.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.hero h1 {
  font-size: 2.7em;
  color: #00d0ff;
  text-shadow: 0 0 20px #00d0ff;
  margin-bottom: 15px;
}
.hero h1 span {
  color: #00ff99;
  text-shadow: 0 0 20px #00ff99;
}
.hero p {
  font-size: 1.2em;
  color: #c7d5ff;
  margin-bottom: 40px;
}

/* Butonlar */
.btn-group {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}
.btn-redeem, .btn-buy {
  padding: 14px 36px;
  border-radius: 10px;
  font-size: 1.1em;
  font-weight: bold;
  color: #fff;
  text-decoration: none;
  transition: 0.3s;
}
.btn-redeem {
  background: linear-gradient(45deg, #00d0ff, #0040ff);
  box-shadow: 0 0 20px rgba(0,208,255,0.7);
}
.btn-buy {
  background: linear-gradient(45deg, #00ff88, #00cc66);
  box-shadow: 0 0 20px rgba(0,255,150,0.6);
}
.btn-redeem:hover, .btn-buy:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 30px rgba(0,255,255,0.8);
}

/* Özellikler */
.features {
  display: flex;
  justify-content: center;
  gap: 25px;
  flex-wrap: wrap;
}
.feature {
  background: rgba(15, 25, 60, 0.85);
  padding: 20px;
  border-radius: 10px;
  width: 260px;
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
}
.feature:hover {
  transform: translateY(-6px);
  box-shadow: 0 0 20px rgba(0,208,255,0.6);
}
.feature i {
  font-size: 2em;
  color: #00d0ff;
  margin-bottom: 10px;
}

/* Footer */
.main-footer {
  background: rgba(10,15,35,0.9);
  padding: 15px 0;
  text-align: center;
  color: #8b949e;
  font-size: 0.9em;
  border-top: 1px solid #1a2b55;
}
.main-footer a {
  color: #58a6ff;
  text-decoration: none;
}
.main-footer a:hover {
  color: #00e0ff;
}
.invite-banner {
  text-align: center;
  margin: 40px auto;
}

.invite-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(90deg, #FFD700, #FFB700);
  color: #222;
  font-weight: 700;
  font-size: 18px;
  text-decoration: none;
  padding: 14px 26px;
  border-radius: 50px;
  box-shadow: 0 0 20px rgba(255, 215, 0, 0.6);
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.invite-btn:hover {
  transform: scale(1.07);
  box-shadow: 0 0 40px rgba(255, 230, 100, 0.9);
  background: linear-gradient(90deg, #FFEA00, #FFC300);
}

.invite-btn .icon {
  font-size: 22px;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%,100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.15); opacity: 0.8; }
}