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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 20px;
}

.toggle {
  width: 60px;
  height: 60px;
  display: flex;
  background: rgba(255, 255, 255, 0.95);
  cursor: pointer;
  flex-wrap: wrap;
  align-items: center;
  padding: 12px;
  border-radius: 12px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
  transition: all 0.3s ease;
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 1000;
}

.toggle:hover {
  transform: scale(1.1);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.3);
}

.toggle span {
  width: 100%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  height: 4px;
  transition: 0.3s;
  border-radius: 2px;
}

.toggle:hover span {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

nav {
  position: fixed;
  z-index: 99999;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    rgba(102, 126, 234, 0.98) 0%,
    rgba(118, 75, 162, 0.98) 100%
  );
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  transition: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  transform: translateY(-100%);
  opacity: 0;
}

nav.open {
  transform: translateY(0);
  opacity: 1;
}

nav .close {
  position: fixed;
  top: 30px;
  right: 30px;
  color: white;
  border: 3px solid white;
  width: 60px;
  height: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 32px;
  font-weight: bold;
  border-radius: 50%;
  transition: all 0.3s ease;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(5px);
}

nav .close:hover {
  color: #f5576c;
  border-color: #f5576c;
  background: rgba(245, 87, 108, 0.2);
  transform: rotate(90deg) scale(1.1);
  box-shadow: 0 0 25px rgba(245, 87, 108, 0.5);
}

nav a {
  color: white;
  text-decoration: none;
  font-size: 45px;
  font-weight: 600;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 25px;
  margin: 5px 0;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

nav a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 0;
  height: 100%;
  background: rgba(255, 255, 255, 0.15);
  transition: width 0.4s ease;
}

nav a:hover::before {
  width: 100%;
}

nav a:hover {
  transform: translateX(20px);
  letter-spacing: 3px;
  text-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
}

/* Content Container */
.content {
  max-width: 1200px;
  margin: 100px auto 40px;
  background: rgba(255, 255, 255, 0.95);
  padding: 40px;
  border-radius: 20px;
  box-shadow: 0 15px 50px rgba(0, 0, 0, 0.3);
}

.content h1 {
  color: #667eea;
  font-size: 2.5rem;
  margin-bottom: 20px;
  text-align: center;
}

.content p {
  color: #555;
  line-height: 1.8;
  font-size: 1.1rem;
  margin-bottom: 30px;
  text-align: center;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 25px;
  margin-top: 40px;
}

.feature-card {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 30px;
  border-radius: 15px;
  color: white;
  text-align: center;
  transition: all 0.3s ease;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
}

.feature-card p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1rem;
}

@media (max-width: 768px) {
  .toggle {
    width: 50px;
    height: 50px;
    top: 15px;
    left: 15px;
  }

  nav .close {
    width: 50px;
    height: 50px;
    top: 20px;
    right: 20px;
    font-size: 28px;
  }

  nav a {
    font-size: 32px;
    padding: 20px;
  }

  .content {
    margin: 80px 10px 20px;
    padding: 25px;
  }

  .content h1 {
    font-size: 2rem;
  }

  .content p {
    font-size: 1rem;
  }

  .features {
    grid-template-columns: 1fr;
  }
}