body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

header {
    background-color: #1a1a1a;
    color: #fff;
    padding: 20px;
    text-align: center;
}

header nav a {
    color: #fff;
    margin: 0 15px;
    text-decoration: none;
    font-weight: bold;
}

section {
    padding: 40px 20px;
    text-align: center;
}

form input, form button {
    padding: 10px;
    margin: 5px;
}

form button {
    background-color: #1a1a1a;
    color: #fff;
    border: none;
    cursor: pointer;
}

footer {
    background-color: #1a1a1a;
    color: #fff;
    padding: 20px;
    text-align: center;
}
/* Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Body */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background: #f0f2f5;
    color: #333;
}

/* Header */
header {
    background: linear-gradient(90deg, #1a73e8, #4285f4);
    color: white;
    padding: 20px 0;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

header h1 {
    font-size: 2.2rem;
    margin-bottom: 10px;
}

header nav a {
    color: white;
    margin: 0 15px;
    text-decoration: none;
    font-weight: 600;
    transition: 0.3s;
}

header nav a:hover {
    text-decoration: underline;
}

/* Sections */
section {
    padding: 60px 20px;
    max-width: 900px;
    margin: auto;
}

/* About */
#about p {
    font-size: 1.1rem;
    margin-top: 15px;
    text-align: center;
}

/* Courses */
#courses h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #1a73e8;
}

#courses ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    list-style: none;
    gap: 20px;
}

#courses ul li {
    background: white;
    padding: 20px;
    border-radius: 10px;
    flex: 1 1 200px;
    max-width: 250px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    text-align: center;
}

#courses ul li:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 14px rgba(0,0,0,0.15);
}

/* Signup Form */
#signup h2 {
    text-align: center;
    color: #1a73e8;
    margin-bottom: 20px;
}

form {
    display: flex;
    flex-direction: column;
    align-items: center;
}

form input {
    width: 80%;
    max-width: 350px;
    padding: 12px;
    margin: 10px 0;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 1rem;
}

form button {
    width: 80%;
    max-width: 350px;
    padding: 12px;
    background: #1a73e8;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: 0.3s;
}

form button:hover {
    background: #1669c1;
}

/* Footer */
footer {
    background: #1a1a1a;
    color: white;
    text-align: center;
    padding: 20px;
    margin-top: 40px;
}