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

@keyframes colorShift {
  0%   { background-color: rgb(30, 20, 40); }
  14%  { background-color: rgb(20, 35, 50); }
  28%  { background-color: rgb(25, 40, 35); }
  42%  { background-color: rgb(40, 30, 25); }
  57%  { background-color: rgb(45, 20, 35); }
  71%  { background-color: rgb(30, 25, 50); }
  85%  { background-color: rgb(20, 40, 45); }
  100% { background-color: rgb(30, 20, 40); }
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  color: rgba(255, 255, 255, 0.9);
  animation: colorShift 45s ease-in-out infinite;
  min-height: 100vh;
  line-height: 1.6;
}

a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.25);
  transition: color 0.2s, border-color 0.2s;
}

a:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.6);
}

nav {
  display: flex;
  justify-content: center;
  gap: 2rem;
  padding: 1.5rem 1rem;
  font-size: 0.95rem;
}

nav a {
  border-bottom: none;
  opacity: 0.7;
  transition: opacity 0.2s;
}

nav a:hover,
nav a.active {
  opacity: 1;
}

.container {
  max-width: 680px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

h1 {
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
  letter-spacing: -0.02em;
}

.subtitle {
  font-size: 1.1rem;
  opacity: 0.65;
  margin-bottom: 2.5rem;
}

h2 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-top: 2.2rem;
  margin-bottom: 0.6rem;
}

p, li {
  font-size: 1rem;
  opacity: 0.85;
  margin-bottom: 0.8rem;
}

ul {
  padding-left: 1.3rem;
  margin-bottom: 1rem;
}

.features {
  list-style: none;
  padding-left: 0;
}

.features li {
  padding: 0.6rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.features li:last-child {
  border-bottom: none;
}

.features li strong {
  display: block;
  opacity: 1;
  margin-bottom: 0.15rem;
}

footer {
  display: flex;
  justify-content: space-between;
  max-width: 680px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  font-size: 0.85rem;
  opacity: 0.45;
}

.legal-date {
  font-size: 0.9rem;
  opacity: 0.5;
  margin-bottom: 2rem;
}

@media (max-width: 500px) {
  h1 { font-size: 1.8rem; }
  nav { gap: 1.2rem; }
  .container { padding: 1.5rem 1rem 3rem; }
}