body {
  background-color: #0a0a0a;
  color: #f5f5f5;
  font-family: 'Helvetica Neue', sans-serif;
  margin: 0;
  padding: 0;
}
.b100-container {
  max-width: 700px;
  margin: 40px auto;
  padding: 40px;
  background-color: #111;
  border-radius: 12px;
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.05);
}
.b100-header h1 {
  font-size: 2.4rem;
  margin-bottom: 0.3em;
  text-align: center;
}
.b100-header p {
  font-size: 1.1rem;
  text-align: center;
  color: #bbb;
}
.b100-form label {
  margin-top: 20px;
  display: block;
  font-weight: bold;
}
.b100-form input, .b100-form select, .b100-form textarea {
  width: 100%;
  padding: 12px;
  margin-top: 6px;
  margin-bottom: 20px;
  background: #222;
  border: 1px solid #333;
  border-radius: 8px;
  color: #f5f5f5;
  font-size: 1rem;
}
.b100-form textarea {
  resize: vertical;
}
.b100-form input[type="submit"] {
  background: #fff;
  color: #000;
  font-weight: bold;
  cursor: pointer;
  transition: background 0.3s ease;
}
.b100-form input[type="submit"]:hover {
  background: #ccc;
}
.b100-note, .b100-contact {
  font-size: 0.95rem;
  color: #aaa;
  text-align: center;
}
.b100-contact a {
  color: #f5f5f5;
  text-decoration: underline;
}