:root{
  --pastel-blue: #eaf4ff;
  --soft-blue: #cfe8ff;
  --accent-blue: #4f8ef7;
  --text-dark: #1e293b;
  --text-light: #475569;
  --white: #ffffff;
  --shadow: 0 15px 35px rgba(79, 142, 247, 0.15);
  --radius: 18px;
}

/* ---------- Body ---------- */
body{
  margin:0;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background-color: var(--pastel-blue);
  color: var(--text-dark);
  line-height: 1.8;
  padding: 50px 15px;
  position: relative;
  overflow-x: hidden;
}

/* Decorative Floating Circles */
body::before,
body::after{
  content: "";
  position: absolute;
  border-radius: 50%;
  z-index: 0;
}

body::before{
  width: 350px;
  height: 350px;
  background: var(--soft-blue);
  top: -100px;
  left: -120px;
  opacity: 0.5;
}

body::after{
  width: 250px;
  height: 250px;
  background: #dbeafe;
  bottom: -80px;
  right: -100px;
  opacity: 0.6;
}

/* ---------- Container Card ---------- */
.container{
  max-width: 900px;
  margin: auto;
  background: var(--white);
  padding: 45px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  position: relative;
  z-index: 1;
}

/* ---------- Typography ---------- */
h1{
  font-size: 32px;
  margin-bottom: 15px;
  color: var(--text-dark);
}

.intro{
  font-size: 18px;
  background: #f1f8ff;
  padding: 18px;
  border-left: 5px solid var(--accent-blue);
  border-radius: 12px;
  margin-bottom: 25px;
  color: var(--text-light);
}

h2{
  margin-top: 35px;
  margin-bottom: 12px;
  color: var(--accent-blue);
  position: relative;
  padding-bottom: 6px;
}

h2::after{
  content: "";
  width: 50px;
  height: 3px;
  background: var(--accent-blue);
  position: absolute;
  left: 0;
  bottom: 0;
  border-radius: 3px;
}

/* ---------- Paragraph ---------- */
p{
  color: var(--text-light);
  margin-bottom: 15px;
}

/* ---------- Links ---------- */
a{
  color: var(--accent-blue);
  font-weight: 600;
  text-decoration: none;
  transition: 0.3s ease;
}

a:hover{
  text-decoration: underline;
  opacity: 0.8;
}

/* ---------- List Design ---------- */
ul{
  list-style: none;
  padding: 0;
  margin: 15px 0 25px;
}

li{
  padding: 12px 15px 12px 40px;
  margin-bottom: 10px;
  background: #f7fbff;
  border-radius: 12px;
  position: relative;
  color: var(--text-light);
  border: 1px solid #e0f0ff;
}

li::before{
  content: "●";
  position: absolute;
  left: 15px;
  top: 10px;
  font-size: 18px;
  color: var(--accent-blue);
}

/* ---------- Responsive ---------- */
@media (max-width: 768px){
  .container{
    padding: 25px;
  }

  h1{
    font-size: 24px;
  }

  .intro{
    font-size: 16px;
  }
}