:root{
  --bg:#f7f5ef;
  --text:#1f1f1f;
  --muted:#666;
  --accent:#143c3c;
  --border:#d8d2c7;
}

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}

.container{
  max-width:420px;
  margin:6rem auto;
  padding:0 1rem;
}

h1{
  margin:0 0 .5rem;
}

.intro{
  color:var(--muted);
  margin-bottom:2rem;
}

label{
  display:block;
  margin:.75rem 0 .35rem;
  font-weight:600;
}

input{
  width:100%;
  padding:.75rem;
  border:1px solid var(--border);
  border-radius:4px;
  box-sizing:border-box;
}

button{
  margin-top:1rem;
  padding:.75rem 1rem;
  border:0;
  background:var(--accent);
  color:white;
  cursor:pointer;
}

.error{
  margin-top:1rem;
  color:#9b1c1c;
}

.back{
  margin-top:2rem;
}