:root {
  --background-color: #f4f6fb;
  --container-background: white;
  --text-color: #000;
  --button-background: #4f46e5;
  --button-hover-background: #4338ca;
  --ball-background: #fde68a;
  --h1-color: #000;
  --h3-color: #000;
}

body.dark-mode {
  --background-color: #121212;
  --container-background: #1e1e1e;
  --text-color: #fff;
  --button-background: #bb86fc;
  --button-hover-background: #a259ff;
  --ball-background: #333;
  --h1-color: #fff;
  --h3-color: #fff;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background: var(--background-color);
  color: var(--text-color);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  transition: background-color 0.3s, color 0.3s;
}

.container {
  background: var(--container-background);
  padding: 40px;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
  width: 420px;
  position: relative;
}

.theme-switcher {
  position: absolute;
  top: 20px;
  right: 20px;
}

#theme-toggle {
  display: none;
}

#theme-toggle + label {
  cursor: pointer;
  font-size: 14px;
}

h1 {
    color: var(--h1-color);
}

h3 {
    color: var(--h3-color);
}

button {
  padding: 12px 24px;
  font-size: 16px;
  border: none;
  border-radius: 8px;
  background-color: var(--button-background);
  color: white;
  cursor: pointer;
  margin-bottom: 25px;
}

button:hover {
  background-color: var(--button-hover-background);
}

.set {
  margin-bottom: 20px;
}

.numbers {
  display: flex;
  justify-content: center;
  gap: 8px;
}

.ball {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--ball-background);
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: bold;
}

.partnership-form {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--text-color);
}

.partnership-form h2 {
    color: var(--h1-color);
    margin-bottom: 20px;
}

.partnership-form form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    text-align: left;
}

.partnership-form label {
    font-weight: bold;
    color: var(--text-color);
}

.partnership-form input[type="text"],
.partnership-form input[type="email"],
.partnership-form textarea {
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 16px;
    background-color: var(--container-background);
    color: var(--text-color);
}

.partnership-form input[type="text"]:focus,
.partnership-form input[type="email"]:focus,
.partnership-form textarea:focus {
    border-color: var(--button-background);
    outline: none;
}

.partnership-form button[type="submit"] {
    background-color: var(--button-background);
    color: white;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    margin-top: 10px;
}

.partnership-form button[type="submit"]:hover {
    background-color: var(--button-hover-background);
}