@import url("https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0-beta3/css/all.min.css");

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: #f8fafc;
  margin: 0;
  padding: 20px;
}

header {
  text-align: center;
  margin-bottom: 40px;
}

nav {
  margin-top: 20px;
}

nav a {
  display: inline-block;
  padding: 10px 20px;
  margin: 5px;
  border-radius: 25px;
  text-decoration: none;
  font-weight: bold;
  transition: background 0.3s, transform 0.3s;
  color: white;
}

nav a:hover {
  transform: scale(1.05);
}

nav a[href="#html-lessons"] {
  background-color: #e34c26;
}

nav a[href="#css-lessons"] {
  background-color: #264de4;
}

nav a[href="#js-lessons"] {
  background-color: #f0db4f;
  color: #000;
}

nav a[href="#bootstrap-lessons"] {
  background-color: #7952b3;
}

nav a[href="#projects"] {
  background-color: #28a745;
}

h1 {
  color: #1f2937;
  font-size: 36px;
}

.section {
  margin-bottom: 60px;
  padding: 30px 20px;
  border-radius: 20px;
  color: #fff;
}

#html-lessons {
  background: linear-gradient(135deg, #e34c26, #f06529);
}

#css-lessons {
  background: linear-gradient(135deg, #264de4, #2965f1);
}

#js-lessons {
  background: linear-gradient(135deg, #f0db4f, #f7df1e);
  color: #000;
}

#bootstrap-lessons {
  background: linear-gradient(135deg, #7952b3, #6f42c1);
}

#projects {
  background: linear-gradient(135deg, #28a745, #218838);
}

.card {
  background: #ffffff;
  border-radius: 15px;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
  margin: 20px 0;
  padding: 25px;
  transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 20px rgba(0, 0, 0, 0.2);
}

.card h3 {
  margin-top: 0;
  color: #4f46e5;
  font-size: 24px;
}

.card p {
  color: #555;
  font-size: 16px;
}

.card a {
  display: inline-block;
  margin-top: 15px;
  background: #4f46e5;
  color: white;
  padding: 10px 18px;
  border-radius: 25px;
  text-decoration: none;
  font-weight: bold;
  transition: background 0.3s, transform 0.3s;
}

.card a:hover {
  background: #4338ca;
  transform: scale(1.05);
}

#scrollToTopBtn {
  position: fixed;
  bottom: 10px;
  right: 10px;
  background-color: #4f46e5;
  color: white;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  display: none;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  font-size: 24px;
  transition: background 0.3s, transform 0.3s;
}

#scrollToTopBtn:hover {
  background-color: #4338ca;
  transform: scale(1.1);
}

.no-content {
  color: #fff;
  font-size: 18px;
  text-align: center;
}