Se agrego el formulario y se le dio estilo con el archivo agregado styles.css

styles.css

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+* {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
+}
+body {
+    background-color: #f4f7f9;
+    color: #333;
+    line-height: 1.6;
+}
+header {
+    background-color: #1a1a2e;
+    color: #fff;
+    padding: 1rem 5%;
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
+}
+.logo {
+    width: 50px;
+    height: auto;
+    vertical-align: middle;
+}
+header h1 {
+    font-size: 1.5rem;
+    display: inline-block;
+}
+nav ul {
+    list-style: none;
+    display: flex;
+    align-items: center;
+}
+nav ul li {
+    margin-left: 20px;
+}
+nav ul li a {
+    color: #fff;
+    text-decoration: none;
+    font-weight: 500;
+}
+#Suscripcion {
+    background-color: #00d2ff;
+    color: #1a1a2e;
+    border: none;
+    padding: 10px 20px;
+    border-radius: 5px;
+    cursor: pointer;
+    font-weight: bold;
+    transition: background 0.3s;
+}
+#Suscripcion:hover {
+    background-color: #0099cc;
+}
+main {
+    max-width: 900px;
+    margin: 40px auto;
+    padding: 20px;
+    background: #fff;
+    border-radius: 8px;
+    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
+}
+h2, h3 {
+    color: #1a1a2e;
+    margin-bottom: 15px;
+}
+table {
+    width: 100%;
+    border-collapse: collapse;
+    margin: 20px 0;
+}
+table th, table td {
+    text-align: left;
+    padding: 12px;
+    border-bottom: 1px solid #ddd;
+}
+table th {
+    background-color: #f8f9fa;
+    color: #1a1a2e;
+}
+#seccionFormulario {
+    margin-top: 30px;
+    padding-top: 20px;
+    border-top: 2px solid #eee;
+}
+form div {
+    margin-bottom: 15px;
+}
+label {
+    display: block;
+    margin-bottom: 5px;
+    font-weight: 600;
+}
+input[type="text"],
+input[type="email"],
+input[type="number"],
+select,
+textarea {
+    width: 100%;
+    padding: 10px;
+    border: 1px solid #ccc;
+    border-radius: 4px;
+    font-size: 1rem;
+}
+input[type="radio"],
+input[type="checkbox"] {
+    margin-right: 8px;
+}
+button[type="submit"] {
+    background-color: #28a745;
+    color: white;
+    border: none;
+    padding: 12px;
+    width: 100%;
+    border-radius: 4px;
+    font-size: 1.1rem;
+    cursor: pointer;
+    font-weight: bold;
+}
+button[type="submit"]:hover {
+    background-color: #218838;
+}
+footer {
+    text-align: center;
+    padding: 20px;
+    color: #777;
+    font-size: 0.9rem;
+}