:root {
  --bg: #F7DCE0;
  --text: #4A2E2E;
  --accent: #C05B41;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
  margin: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Karla', sans-serif;
  font-size: 16px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.screen {
  height: 100vh;
  display: flex;
  flex-direction: column;
}

.screen[hidden] {
  display: none;
}

#login-screen {
  align-items: center;
  justify-content: center;
}

#login-form input[type="password"] {
  border: none;
  border-bottom: 1px solid var(--text);
  background: transparent;
  color: var(--text);
  font-family: 'Karla', sans-serif;
  font-size: 1.1rem;
  padding: 0.5rem 0.25rem;
  text-align: center;
  outline: none;
  width: 200px;
}

.chat-header {
  padding: 1.25rem 1.5rem 0.75rem;
  flex-shrink: 0;
}

.wordmark {
  font-family: 'Fraunces', serif;
  font-style: italic;
  font-weight: 600;
  font-size: 1.4rem;
  color: var(--accent);
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
}

.bubble {
  max-width: 70%;
  padding: 0.55rem 0.85rem;
  border-radius: 14px;
  line-height: 1.35;
  font-size: 0.95rem;
}

.bubble .sender {
  display: block;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  opacity: 0.6;
  margin-bottom: 0.2rem;
}

.bubble .content {
  display: block;
  white-space: pre-wrap;
  word-break: break-word;
}

.bubble.elle {
  background: var(--accent);
  color: #FCEEE9;
}

.bubble.lui {
  background: #ffffff;
  color: var(--text);
}

.meta {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.68rem;
  opacity: 0.6;
  letter-spacing: 0.02em;
}

.message-form {
  flex-shrink: 0;
  display: flex;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem 1.25rem;
}

#message-input {
  flex: 1;
  border: none;
  border-radius: 20px;
  padding: 0.65rem 1rem;
  background: #ffffff;
  color: var(--text);
  font-family: 'Karla', sans-serif;
  font-size: 0.95rem;
  outline: none;
}

.message-form button {
  border: none;
  background: var(--accent);
  color: #fff;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-size: 1.1rem;
  cursor: pointer;
  flex-shrink: 0;
}