body {
  font-family: "Inter", sans-serif;
  margin: 0;
  line-height: 1.6;
  background: linear-gradient(-45deg, #e66465, #9198e5, #e66465);
  background-size: 400% 400%;
  animation: gradient 15s ease infinite;
  color: #1d1d1f;
  transition: background-color 0.3s, color 0.3s;
  scroll-behavior: smooth;
}

@keyframes gradient {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.8);
  z-index: 1000;
}

.logo {
  font-size: 24px;
  font-weight: 700;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
  margin: 0;
  padding: 0;
}
nav a {
  color: #1d1d1f;
  text-decoration: none;
  font-weight: 500;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
}

section {
  max-width: 1000px;
  margin: 0 auto;
  padding: 120px 20px 40px;
}

.hero {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding-top: 0;
}

.hero-content h2 {
  font-size: clamp(2rem, 5vw, 4rem);
  margin-bottom: 20px;
}

.hero-content p {
  font-size: 1.25rem;
}

footer {
  background: #333;
  color: #fff;
  text-align: center;
  padding: 20px;
}

#toggle-dark {
  padding: 8px 16px;
  font-size: 16px;
  cursor: pointer;
}

#bg-music {
  display: none;
}

body.dark-mode {
  background: linear-gradient(-45deg, #000, #333, #000);
  background-size: 400% 400%;
  animation: gradient 15s ease infinite;
  color: #f5f5f7;
}
body.dark-mode header {
  background: rgba(0, 0, 0, 0.8);
}
body.dark-mode nav a {
  color: #f5f5f7;
}
body.dark-mode footer {
  background: #000;
}