* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, #667eea 10%, #764ba2 100%);
  background-attachment: fixed;
  background-repeat: no-repeat;
  background-size: cover;
  min-height: 100vh;
  overflow-x: hidden;
}

.container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 2rem;
  position: relative;
}

/* Animated background particles */
.particle {
  position: absolute;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  pointer-events: none;
  animation: float 6s ease-in-out infinite;
}

.particle:nth-child(1) { width: 80px; height: 80px; top: 10%; left: 10%; animation-delay: 0s; }
.particle:nth-child(2) { width: 60px; height: 60px; top: 20%; right: 10%; animation-delay: 2s; }
.particle:nth-child(3) { width: 40px; height: 40px; bottom: 30%; left: 20%; animation-delay: 4s; }
.particle:nth-child(4) { width: 100px; height: 100px; bottom: 10%; right: 20%; animation-delay: 1s; }

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); opacity: 0.7; }
  50% { transform: translateY(-20px) rotate(180deg); opacity: 0.3; }
}

.main-content {
  text-align: center;
  z-index: 10.logo:hover::before {
    transform: rotate(45deg) translate(50%, 50%);
  };
  max-width: 800px;
}

.logo-container {
  margin-bottom: 2rem;
  position: relative;
}

.logo {
  width: 120px;
  height: 120px;
  background: url('epi_favicon.svg');
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
  transition: transform 0.3s ease;
  position: relative;
  overflow: hidden;
}

.logo::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transform: rotate(45deg);
  transition: transform 0.6s ease;
}

.logo:hover {
  transform: scale(1.05) rotate(5deg);
}

.logo-placeholder {
  font-size: 3rem;
  color: #333;
}

h1 {
  font-size: 3.5rem;
  font-weight: 800;
  color: white;
  margin-bottom: 1rem;
  background: linear-gradient(45deg, #fff, #f0f0f0);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  animation: fadeInUp 1s ease-out;
}

.subtitle {
  font-size: 1.3rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 3rem;
  font-weight: 300;
  animation: fadeInUp 1s ease-out 0.2s both;
}

.nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  width: 100%;
  max-width: 800px;
  animation: fadeInUp 1s ease-out 0.4s both;
}

.nav-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  border-radius: 20px;
  padding: 2.5rem 2rem;
  text-decoration: none;
  color: white;
  transition: all 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.2);
  position: relative;
  overflow: hidden;
  group: hover;
}

.nav-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: left 0.5s ease;
}

.nav-card:hover::before {
  left: 100%;
}

.nav-card:hover {
  transform: translateY(-10px) scale(1.02);
  background: rgba(255, 255, 255, 0.15);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.2);
}

.nav-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
  transition: transform 0.3s ease;
}

.nav-card:hover .nav-icon {
  transform: scale(1.1) rotate(5deg);
}

.nav-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.nav-description {
  font-size: 1rem;
  opacity: 0.8;
  line-height: 1.5;
}

.games { --accent: #ff6b6b; }
.todo { --accent: #4ecdc4; }
.others { --accent: #45b7d1; }

.nav-card.games:hover { border-color: var(--accent); box-shadow: 0 25px 50px rgba(255, 107, 107, 0.3); }
.nav-card.todo:hover { border-color: var(--accent); box-shadow: 0 25px 50px rgba(78, 205, 196, 0.3); }
.nav-card.others:hover { border-color: var(--accent); box-shadow: 0 25px 50px rgba(69, 183, 209, 0.3); }

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }
  
  .subtitle {
    font-size: 1.1rem;
  }
  
  .nav-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .nav-card {
    padding: 2rem 1.5rem;
  }
}

/* Floating elements */
.floating-shape {
  position: absolute;
  pointer-events: none;
  opacity: 0.1;
}

.shape-1 {
  top: 10%;
  left: 5%;
  width: 50px;
  height: 50px;
  background: white;
  border-radius: 10px;
  animation: rotate 10s linear infinite;
}

.shape-2 {
  top: 70%;
  right: 10%;
  width: 30px;
  height: 30px;
  background: white;
  border-radius: 50%;
  animation: rotate 15s linear infinite reverse;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* This gets used within the script */
@keyframes sparkleAnim {
  0% {
    transform: scale(0) rotate(0deg);
    opacity: 1;
  }
  50% {
    transform: scale(1) rotate(180deg);
    opacity: 1;
  }
  100% {
    transform: scale(0) rotate(360deg);
    opacity: 0;
  }
}