* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

body {
    line-height: 1.6;
    color: #333;
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: auto;
}

header {
    background: #1f4fd8;
    color: #fff;
    padding: 40px 0;
    text-align: center;
}

nav {
    background: #111;
}

nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    padding: 15px 0;
    display: inline-block;
}

nav ul li a:hover {
    color: #1f4fd8;
}

.section {
    padding: 50px 0;
}

.section.light {
    background: #f4f4f4;
}

h2 {
    margin-bottom: 20px;
    text-align: center;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.card {
    background: #fff;
    padding: 20px;
    text-align: center;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.list {
    max-width: 400px;
    margin: auto;
    list-style: none;
}

.list li {
    padding: 10px 0;
    font-size: 18px;
}

form {
    max-width: 500px;
    margin: auto;
    display: flex;
    flex-direction: column;
}

form input, form textarea {
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

form button {
    background: #1f4fd8;
    color: #fff;
    padding: 12px;
    border: none;
    cursor: pointer;
}

form button:hover {
    background: #1639a3;
}

.msg {
    text-align: center;
    margin-top: 10px;
    color: green;
}

footer {
    background: #111;
    color: #fff;
    text-align: center;
    padding: 15px 0;
    margin-top: 20px;
}