body, h1, h2, h3, p, ul, ol, a, input, button {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    background-color: #f4f4f9;
    color: #333;
    padding: 20px;
    animation: 15s ease 0s normal none infinite swing;
    transform-origin: center top;
}

@keyframes swing {
    0% {transform:rotate(-3deg)}
    50% {transform:rotate(3deg)}
    100% {transform:rotate(-3deg)}
}

h1 {
    font-size: 2.5rem;
    text-align: center;
    color: #4c7ee3;
    margin-bottom: 10px;
}

h2 {
    font-size: 1.8rem;
    color: #555;
    margin-bottom: 10px;
}

p {
    font-size: 1rem;
    margin-bottom: 15px;
}

a {
    color: #4c7ee3;
    text-decoration: none;
    font-weight: bold;
}

a:hover {
    text-decoration: underline;
}

ul, ol {
    margin-left: 20px;
    margin-bottom: 15px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

button {
    background-color: #4c7ee3;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s, transform 0.1s;
}

button:hover {
    background-color: #316ce2;
}

button:active {
    background-color: #155ae5;
    transform: scale(0.95); 
}

input[type="text"], input[type="email"], input[type="password"], textarea {
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 1rem;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: border-color 0.3s, box-shadow 0.3s;
}

input:focus, textarea:focus {
    border-color: #4c7ee3;
    box-shadow: 0 0 5px rgba(76, 175, 80, 0.5);
    outline: none;
}

footer {
    text-align: center;
    margin-top: 20px;
    font-size: 0.9rem;
    color: #666;
}