/* ... existing CSS styles ... */

body {
  background-color: rgb(0,0,0);
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

header {
  display: flex;
}

header, footer {
  color: #fff;
  text-align: center;
  padding: 20px;
}

header .logo {
  max-width: 700px;
  flex: 0 0 50%;
}

header .button-container {
  border-radius: 20px;
  background-color: #001a39;
  display: flex;
  margin: 40px auto;
  padding: 20px;
  width: fit-content;
}

header .button-container > div {
  width: fit-content;
  margin: 20px;
  text-align: center;
}

header .button-container h3 {
  margin-top: 0;
}


.page-container {
  margin: auto;
  max-width: 1600px;
}

.content-container {
  color: #fff;
  border-radius: 20px;
  background-color: #000;
  box-sizing: border-box;
  display: flex;
  font-size: 1.2em;
  text-align: left;
}

.content-container h1 {
  margin-top: 20px;
  color: #c00;
  font-size: 3em;
}

.content-container h2 {
  color: #fc0;
  font-size: 1.2em;
}

.content-container h3 {
  font-size: 1.1em;
}

.logo {
  width: auto;
}

.logo .logo-img {
  width: 100%;
  height: auto;
}

.sidebar {
  flex: 0 0 calc(20% - 20px);
}

.main-content {
  padding: 20px;
  flex: 0 0 calc(80% - 20px);
}

.main-content .button-container {
  display: none;
}

.button-container button {
  border: 0;
  border-radius: 10px;
  color: #fff;
  font-size: larger;
  font-weight: bold;
  outline: 0;
  padding: 15px 25px;
}

.button-container button:focus {
  border: 1px solid dotted;
}

.button-container button.contribute-btn {
  background: rgb(9,99,15);
  background: linear-gradient(180deg, rgba(9,99,15,1) 0%, rgba(7,156,47,1) 100%);
}

.button-container button.mailing-list-btn {
  background: rgb(9,31,121);
  background: linear-gradient(180deg, rgba(9,31,121,1) 0%, rgba(7,104,184,1) 100%);
}

footer {
  font-size: 1.1em;
}

footer a {
  color: #6262ff;
}

@media screen and (max-width: 800px) {
  .button-container {
    padding-top: 20px;
    display: block;
  }
  .button-container > div {
    margin: auto;
  }
  .button-container > div button {
    font-size: 1.5em;
    padding: 15px 20px;
  }
  .container {
    flex-direction: column;
  }
  .mobile-menu {
    display: none;
  }
 .mailing-list-signup-container form {
    display:  block;
  }
 .sidebar {
  display: none;
 }
 header .logo {
  max-width: 700px;
  flex: 0 0 50%;
 }
 header .button-container {
  display: none;
 }
 .main-content .button-container {
  border-radius: 20px;
  background-color: #001a39;
  display: flex;
  margin: 40px auto;
  padding: 20px;
  width: fit-content;
 }
 .main-content .button-container > div {
  width: fit-content;
  margin: 20px;
  text-align: center;
 }
 .main-content .button-container h3 {
  margin-top: 0;
 }
}