:root {
  --bg1: #f7f7f2;
  --bg2: #ece8de;
  --card: #ffffff;
  --text: #212121;
  --accent: #2b6cb0;
  --error: #b83280;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1rem;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 20% 15%, var(--bg1), var(--bg2));
}

.card {
  width: min(100%, 420px);
  background: var(--card);
  border: 1px solid #ddd;
  border-radius: 14px;
  padding: 1.25rem;
  box-shadow: 0 14px 35px rgba(0, 0, 0, 0.08);
}

h1 {
  margin-top: 0;
  font-size: 1.5rem;
}

form {
  display: grid;
  gap: 0.75rem;
}

input,
button {
  font: inherit;
}

input {
  width: 100%;
  padding: 0.7rem 0.8rem;
  border: 1px solid #b9b9b9;
  border-radius: 10px;
}

button {
  width: 100%;
  border: 0;
  border-radius: 10px;
  padding: 0.72rem 0.8rem;
  color: #fff;
  background: var(--accent);
  cursor: pointer;
}

button:disabled {
  opacity: 0.75;
  cursor: wait;
}

#message {
  min-height: 1.25rem;
  margin-bottom: 0;
  color: var(--error);
}

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

a {
  color: var(--accent);
}