body {
  margin: 0;
  font-family: Inter, Arial, sans-serif;
  background: #f5f7fb;
}

.auth-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.auth-box {
  background: #fff;
  border-radius: 12px;
  padding: 24px;
  max-width: 360px;
  width: 100%;
  border: 1px solid #d7deea;
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.auth-box h1 {
  margin: 0 0 8px;
  font-size: 1.5rem;
}

.auth-hint {
  color: #61708a;
  margin: 0 0 16px;
  font-size: 14px;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.auth-form input {
  padding: 10px 12px;
  border: 1px solid #d7deea;
  border-radius: 8px;
  font-size: 16px;
}

.auth-form input:focus {
  outline: none;
  border-color: #38527d;
}

.auth-form button {
  padding: 10px 16px;
  background: #38527d;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
}

.auth-form button:hover {
  background: #2d4263;
}

.auth-error {
  margin: 12px 0 0;
  color: #c53030;
  font-size: 13px;
}

.auth-register-btn {
  margin-top: 10px;
  padding: 8px 14px;
  font-size: 13px;
  background: transparent;
  color: #38527d;
  border: 1px solid #38527d;
  border-radius: 8px;
  cursor: pointer;
}

.auth-register-btn:hover {
  background: #e6eefb;
}

.auth-hint-main {
  font-weight: 500;
  color: #38527d;
}

.auth-code-sent {
  margin: 0 0 10px;
  color: #61708a;
  font-size: 13px;
}

.auth-divider {
  margin: 20px 0 12px;
  border: 0;
  border-top: 1px solid #d7deea;
}

.auth-help {
  margin: 16px 0 0;
  color: #61708a;
  font-size: 12px;
  line-height: 1.4;
}

.logout-btn {
  padding: 4px 10px;
  font-size: 12px;
  color: #61708a;
  background: transparent;
  border: 1px solid #d7deea;
  border-radius: 6px;
  cursor: pointer;
}

.logout-btn:hover {
  color: #38527d;
  border-color: #38527d;
}

.app {
  max-width: 760px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px;
}

.app header {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.app header h1 {
  margin: 0;
  flex: 1;
}

.app header p {
  margin: 0;
  color: #61708a;
  font-size: 14px;
}

.messages {
  background: #fff;
  border-radius: 12px;
  padding: 12px;
  border: 1px solid #d7deea;
  flex: 1;
  min-height: 300px;
  overflow-y: auto;
}

.msg {
  border-bottom: 1px solid #edf1f7;
  padding: 8px 0;
}

.msg:last-child {
  border-bottom: 0;
}

.source {
  display: inline-block;
  margin-left: 6px;
  font-size: 11px;
  color: #38527d;
  background: #e6eefb;
  border-radius: 10px;
  padding: 1px 8px;
}

.meta {
  color: #61708a;
  font-size: 12px;
}

.composer {
  display: flex;
  gap: 8px;
}

.composer input {
  flex: 1;
  padding: 10px;
}