* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #ffffff;
  color: #111827;
  padding: 0;
}

.container {
  width: min(760px, 100%);
  margin: 0 auto;
  background: #ffffff;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  padding: 28px;
}

h1 {
  font-size: 44px;
  margin: 0 0 24px;
}

form {
  display: grid;
  gap: 14px;
}

label {
  font-weight: 700;
}

input[type="text"],
input[type="tel"],
input[type="email"] {
  width: 100%;
  border: 1px solid #9ca3af;
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 18px;
}

.checkbox-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  line-height: 1.4;
  font-weight: 400;
}

.checkbox-row input {
  width: 20px;
  height: 20px;
  margin-top: 4px;
}

button {
  margin-top: 8px;
  border: 0;
  border-radius: 10px;
  background: #2563eb;
  color: #ffffff;
  padding: 14px 20px;
  font-size: 22px;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  background: #1d4ed8;
}

.notice {
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 16px;
}

.notice.success {
  background: #dcfce7;
  color: #166534;
}

.notice.error {
  background: #fee2e2;
  color: #b91c1c;
}

.loading-message {
  display: none;
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 16px;
  background: #dbeafe;
  color: #1e40af;
}

.loading-message.show {
  display: block;
}

button:disabled {
  opacity: 0.75;
  cursor: not-allowed;
}