:root{
  --bg:#0b1020;--card:#121a33;--muted:#8aa0d6;--text:#e7ecff;--accent:#6aa6ff;--accent2:#5fffd0;--danger:#ff6a8b;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:radial-gradient(1200px 600px at 10% -10%, #1a2250 0%, transparent 60%),radial-gradient(900px 500px at 90% 0%, #0f2a4d 0%, transparent 60%),var(--bg);color:var(--text)}
a{color:inherit;text-decoration:none}
header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 20px;position:sticky;top:0;background:linear-gradient(180deg, rgba(11,16,32,.92), rgba(11,16,32,.7) 60%, transparent);backdrop-filter:saturate(1.2) blur(6px);z-index:10}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:.3px}
.logo{width:34px;height:34px;border-radius:10px;background:conic-gradient(from 210deg at 50% 50%, var(--accent), var(--accent2), var(--accent));box-shadow:0 0 25px rgba(106,166,255,.45)}
.subtitle{font-size:12px;color:var(--muted)}
nav{display:flex;align-items:center;gap:12px}
nav a, .nav-btn{display:inline-flex;align-items:center;gap:8px;border:none;border-radius:12px;padding:10px 12px;font-weight:700;color:var(--text);background:linear-gradient(180deg,#1a2446,#131c3a);box-shadow:inset 0 -1px 0 rgba(255,255,255,.04);cursor:pointer}
.container{max-width:1100px;margin:0 auto;padding:16px 20px 80px}
.card{background:linear-gradient(180deg,rgba(27,36,72,.9),rgba(17,24,48,.92));border:1px solid rgba(255,255,255,.06);border-radius:16px;box-shadow:0 8px 30px rgba(0,0,0,.35);padding:18px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}
.btn{cursor:pointer;border:none;border-radius:12px;padding:10px 14px;font-weight:800;color:#0b1020;background:linear-gradient(180deg,var(--accent2),#30e8b6);box-shadow:0 8px 20px rgba(95,255,208,.2), inset 0 -1px 0 rgba(0,0,0,.1)}
.btn.secondary{color:var(--text);background:linear-gradient(180deg,#2b376d,#1a2446)}
.small{font-size:12px;color:var(--muted)}
footer{padding:24px;text-align:center}
.hidden{display:none}
#particles{position:fixed;inset:0;pointer-events:none;z-index:0}
main{position:relative;z-index:1}
.hero{display:flex;flex-direction:column;align-items:center;gap:14px;text-align:center;margin:18px 0 26px}
.hero h1{margin:0;font-size:clamp(28px,4vw,44px)}
.hero p{margin:0;color:var(--muted);max-width:800px}
.card h2{margin:0 0 8px}
.card p{margin:0 0 12px;color:var(--muted)}
.game-card .actions{display:flex;justify-content:space-between;align-items:center;margin-top:10px}
.badge{font-size:11px;color:#0b1020;background:linear-gradient(180deg,var(--accent),#5c86ff);padding:4px 8px;border-radius:999px;font-weight:800}

/* Gradient Text Styles */
.gradient-text {
  background: linear-gradient(135deg, var(--accent2), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent; /* Fallback for browsers that don't support background-clip */
}


/* Support Dropdown Styles */
.support-dropdown {
  position: relative;
  display: inline-block;
}

.support-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  position: relative;
}

.dropdown-arrow {
  font-size: 10px;
  transition: transform 0.2s ease;
  margin-left: 4px;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  background: linear-gradient(180deg, rgba(27,36,72,.98), rgba(17,24,48,.98));
  border: 1px solid rgba(95,255,208,.3);
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(0,0,0,.4), 0 0 20px rgba(95,255,208,.15);
  backdrop-filter: blur(10px);
  min-width: 200px;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.2s ease;
  margin-top: 8px;
}

.dropdown-menu.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: block;
  padding: 12px 16px;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  border-bottom: 1px solid rgba(255,255,255,.05);
  transition: all 0.2s ease;
}

.dropdown-item:last-child {
  border-bottom: none;
  border-radius: 0 0 12px 12px;
}

.dropdown-item:first-child {
  border-radius: 12px 12px 0 0;
}

.dropdown-item:hover {
  background: rgba(95,255,208,.1);
  color: var(--accent2);
  transform: translateX(4px);
}

/* Memory Game Card Flip Styles */
.card-tile {
  transform-style: preserve-3d;
  transition: transform 0.6s ease-in-out;
  perspective: 1000px;
  width: 80px;
  height: 80px;
  border-radius: 12px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.card-tile .face {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  backface-visibility: hidden;
  font-size: 24px;
  font-weight: bold;
}

.card-tile .front {
  background: linear-gradient(180deg, #1a2446, #131c3a);
  border: 1px solid rgba(255,255,255,.08);
  color: var(--text);
  z-index: 2;
}

.card-tile .back {
  background: linear-gradient(180deg, #2b376d, #1a2446);
  border: 1px solid rgba(255,255,255,.12);
  transform: rotateY(180deg);
  color: var(--text);
  z-index: 1;
}

.card-tile.flipped {
  transform: rotateY(180deg);
}