:root {
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: #000;
  background: #fff;
  font-family: Arial, Helvetica, sans-serif;
}

main {
  max-width: 900px;
  margin: 0 auto;
  padding: clamp(32px, 8vw, 96px) 24px;
  font-size: clamp(24px, 4vw, 52px);
  line-height: 1.08;
  font-weight: 551;
  letter-spacing: 0;
}

p {
  margin: 0 0 1.2em;
}

ul {
  margin: -0.7em 0 1.2em;
  padding-left: 1.15em;
}

li {
  margin: 0 0 0.3em;
}

p:last-child {
  margin-bottom: 0;
}

.contact-section {
  margin-top: clamp(48px, 9vw, 96px);
  padding-top: clamp(24px, 5vw, 48px);
  border-top: 1px solid #d8d8d8;
}

.contact-form {
  max-width: 520px;
  font-size: clamp(18px, 2.2vw, 28px);
  line-height: 1.15;
}

.email-label {
  display: block;
  margin-bottom: 0.35em;
}

input[type="email"] {
  width: 100%;
  margin: 0 0 1em;
  padding: 0.65em 0;
  color: #000;
  background: transparent;
  border: 0;
  border-bottom: 1px solid #000;
  border-radius: 0;
  font: inherit;
  letter-spacing: 0;
}

input[type="email"]::placeholder {
  color: #8a8a8a;
}

input[type="email"]:focus {
  outline: none;
  box-shadow: 0 1px 0 #000;
}

.choices {
  display: grid;
  max-width: 520px;
  grid-template-columns: 1fr;
  gap: 0.55em 0.55em;
  font-size: clamp(18px, 2.2vw, 28px);
  line-height: 1.15;
}

.choices label,
.learn-status,
.send-button {
  font: inherit;
  letter-spacing: 0;
}

.choices label {
  cursor: pointer;
}

.learn-status {
  display: grid;
  grid-template-columns: 1em 1fr;
  align-items: center;
  gap: 0.55em;
  width: fit-content;
  color: #9b9b9b;
  pointer-events: none;
}

.choice-box {
  display: block;
  flex: 0 0 1em;
  width: 1em;
  height: 1em;
  margin: 0;
  padding: 0;
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  border: 1px solid #9b9b9b;
  border-radius: 0;
  box-sizing: border-box;
}

.join-choice {
  display: grid;
  grid-template-columns: 1em 1fr;
  gap: 0.55em;
  align-items: center;
  color: #9b9b9b;
  pointer-events: none;
}

.choice-box:checked {
  background: #000;
}

.send-button {
  width: fit-content;
  margin-top: 0.45em;
  padding: 0.45em 0.85em;
  color: #9b9b9b;
  background: #fff;
  border: 1px solid #9b9b9b;
  border-radius: 0;
  cursor: not-allowed;
  pointer-events: none;
}

#email:valid ~ .choices .learn-status {
  color: #000;
}

#email:valid ~ .choices .join-choice {
  color: #000;
  pointer-events: auto;
}

#email:valid ~ .choices .learn-status .choice-box {
  border-color: #000;
  background: #000;
}

#email:valid ~ .choices .join-choice .choice-box {
  border-color: #000;
}

#email:valid ~ .choices .send-button {
  color: #000;
  border-color: #000;
  cursor: pointer;
  pointer-events: auto;
}

#email:valid ~ .choices .send-button:hover,
#email:valid ~ .choices .send-button:focus {
  color: #fff;
  background: #000;
  outline: none;
}