.start-btn {
  display: inline-block;
  margin-top: 15px;
  padding: 10px 20px;
  background: #0077ff;
  color: white;
  text-decoration: none;
  border-radius: 5px;
}

.start-btn:hover {
  background: #0056cc;
}

nav {
  background: #222;
  padding: 10px;
  text-align: center;
}

nav a {
  color: white;
  margin: 10px;
  text-decoration: none;
  font-weight: bold;
}

nav a:hover {
  color: #00bfff;
}

.courses {
  text-align: center;
  padding: 30px;
}

.course-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}

.course-card {
  width: 200px;
  padding: 20px;
  border: 1px solid #ddd;
  border-radius: 8px;
  background: #f9f9f9;
}

.course-card a {
  display: inline-block;
  margin-top: 10px;
  padding: 8px 15px;
  background: #0077ff;
  color: white;
  text-decoration: none;
  border-radius: 5px;
}

.course-card a:hover {
  background: blue;
}

.course-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  transition: 0.3s;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #222;
  padding: 10px 20px;
}

.menu a {
  color: white;
  margin-left: 15px;
  text-decoration: none;
  font-weight: bold;
}

.menu a:hover {
  color: #00bfff;
}

.logo {
  color: white;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #222;
  padding: 10px 20px;
}

.brand {
  line-height: 1;
}

.logo {
  color: white;
  margin: 0;
}

.tagline {
  color: #ccc;
  font-size: 12px;
  margin: 0;
}

.menu a {
  color: white;
  margin-left: 15px;
  text-decoration: none;
  font-weight: bold;
}

.menu a:hover {
  color: #00bfff;
}

.course-card {
  transition: 0.3s;
}

.course-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

section {
  margin-top: 40px;
}

html {
  scroll-behavior: smooth;
}

.features {
  text-align: center;
  margin-top: 40px;
}

.feature-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  margin-top: 20px;
}

.feature-card {
  width: 220px;
  padding: 20px;
  border: 1px solid #ddd;
  border-radius: 8px;
  background: #f9f9f9;
  transition: 0.3s;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.contact {
  text-align: center;
  margin-top: 40px;
}

.contact form {
  display: flex;
  flex-direction: column;
  width: 300px;
  margin: auto;
  gap: 10px;
}

.contact input,
.contact textarea {
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 5px;
}

.contact button {
  padding: 10px;
  background: #0077ff;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

.contact button:hover {
  background: #0056cc;
}

.section-title {
  margin-bottom: 15px;
}

.course-list li {
  margin: 8px 0;
}

.back-btn:hover {
  background: #0056cc;
}

/* NAVBAR */

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 40px;
  background: #111;
  color: white;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 20px;
}

.nav-links a {
  color: white;
  text-decoration: none;
}

/* HERO */

.hero {
  text-align: center;
  padding: 50px;
  background: #e7e7e7;
}

/* LESSON GRID */

.lesson-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

/* FOOTER */

footer {
  text-align: center;
  padding: 20px;
  background-color: black;
  color: #eee;

}

.back-btn {
  background: #0077ff;
  color: white;
  padding: 10px 20px;
  text-decoration: none;
  border-radius: 5px;
}

.container {
  max-width: 1100px;
  margin: auto;
  padding: 40px 20px;
}

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  margin: 0;
  background: #fafafa;
}

.lesson-card {
  display: block;
  background: white;
  padding: 20px;
  border-radius: 10px;
  text-decoration: none;
  color: black;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.lesson-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 40px;
  background: #111;
  color: white;
  position: sticky;
  top: 0;
}

/* Layout */

.layout {
  display: flex;
}

/* Sidebar */

.sidebar {
  width: 250px;
  background: #f4f4f4;
  padding: 20px;
  height: 100vh;
  position: sticky;
  top: 0;
}

.sidebar ul {
  list-style: none;
  padding: 0;
}

.sidebar li {
  margin: 10px 0;
}

.sidebar a {
  text-decoration: none;
  color: #333;
}

/* Main Content */

.content {
  flex: 1;
  padding: 40px;
}

/* 1.Python */
.bodypart {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  margin: 0;
  background: #f4f6f8;
  color: #333;
}

.heroine {
  background: #306998;
  color: white;
  padding: 20px;
  text-align: center;
}

section {
  background: rgb(223, 228, 222);
  margin: 20px auto;
  padding: 20px;
  max-width: 800px;
  border-radius: 8px;
}

h2 {
  color: #000000;
}

code {
  background: #eee;
  padding: 10px;
  display: block;
  border-radius: 5px;
}

a {
  text-decoration: none;
  color: white;
  background: #306998;
  padding: 10px 15px;
  border-radius: 5px;
}

a:hover {
  background: #969a9e;
}

.image {
  display: block;
  margin-left: auto;
  margin-right: auto;
  margin-top: 20px;
}

.bold {
  font-weight: bold;
}

@media (max-width: 760px) {
  img {
    width: 70%
  }
}