:root {
  --slate: #0b1018;
  --cream: #f0e7d2;
  --gold: #d4a017;
  --gold-soft: rgba(212, 160, 23, 0.16);
  --dim: rgba(240, 231, 210, 0.55);
  --rule: rgba(240, 231, 210, 0.12);
  --error: #d97757;
  --maxw: 720px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--slate);
  color: var(--cream);
  font-family: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.55;
  min-height: 100vh;
}

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 48px 24px 96px;
}

header {
  margin-bottom: 32px;
}

h1 {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 700;
  font-size: 48px;
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
  color: var(--cream);
}

h2 {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 500;
  font-size: 24px;
  margin: 0 0 12px;
}

.tagline {
  color: var(--dim);
  font-size: 15px;
  margin: 0;
}

#deck-input {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

textarea,
input[type="email"],
input[type="text"] {
  font-family: inherit;
  font-size: 15px;
  background: rgba(240, 231, 210, 0.04);
  color: var(--cream);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 12px 14px;
  width: 100%;
}

textarea {
  font-family: "JetBrains Mono", monospace;
  font-size: 13px;
  resize: vertical;
  min-height: 120px;
}

textarea:focus,
input:focus {
  outline: none;
  border-color: var(--gold);
}

button {
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  background: var(--gold);
  color: var(--slate);
  border: none;
  border-radius: 4px;
  padding: 10px 20px;
  cursor: pointer;
  align-self: flex-start;
}

button:hover {
  filter: brightness(1.08);
}

button:disabled {
  background: var(--gold-soft);
  color: var(--dim);
  cursor: not-allowed;
}

#deck-status,
#email-status {
  font-size: 13px;
  color: var(--dim);
  min-height: 18px;
  margin: 0;
}

#deck-status.error,
#email-status.error {
  color: var(--error);
}

#chat {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

#messages {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 8px 0;
}

.msg {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.msg .who {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--dim);
}

.msg.user .who {
  color: var(--gold);
}

.msg .body {
  white-space: pre-wrap;
  word-wrap: break-word;
  font-size: 15px;
}

.msg .body .card-name {
  text-decoration: underline;
  text-decoration-color: var(--gold);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}

.msg.error .body {
  color: var(--error);
  font-style: italic;
}

#message-form {
  display: flex;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--rule);
}

#message-form input {
  flex: 1;
}

#messages-remaining {
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  color: var(--dim);
  margin: 0;
}

#email-capture {
  border-top: 1px solid var(--rule);
  padding-top: 24px;
  margin-top: 24px;
}

#email-form {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

#email-form input {
  flex: 1;
}

@media (max-width: 540px) {
  main { padding: 32px 16px 64px; }
  h1 { font-size: 36px; }
}