:root {
  --background: #f4f5f7;
  --surface: #ffffff;
  --border: #d8dbe0;
  --text: #1f2933;
  --muted: #616e7c;
  --accent: #cfb87c;
  --accent-dark: #a89151;
  --error: #b3261e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: var(--background);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
}

.card {
  width: 100%;
  max-width: 32rem;
  padding: 2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  box-shadow: 0 1px 3px rgba(31, 41, 51, 0.08);
}

h1 {
  margin: 0 0 0.25rem;
  font-size: 1.5rem;
}

.subtitle {
  margin: 0 0 1.5rem;
  color: var(--muted);
}

form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

input[type="text"] {
  flex: 1 1 14rem;
  padding: 0.625rem 0.75rem;
  font: inherit;
  color: inherit;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.375rem;
}

input[type="text"]:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent-dark);
  outline-offset: 2px;
}

button {
  padding: 0.625rem 1.25rem;
  font: inherit;
  font-weight: 600;
  color: var(--text);
  background: var(--accent);
  border: none;
  border-radius: 0.375rem;
  cursor: pointer;
}

button:hover {
  background: var(--accent-dark);
}

.message {
  margin: 1.5rem 0 0;
  padding: 0.875rem 1rem;
  border-radius: 0.375rem;
  overflow-wrap: anywhere;
}

.message--echo {
  background: #f7f3e6;
  border-left: 4px solid var(--accent);
}

.message--error {
  color: var(--error);
  background: #fdecea;
  border-left: 4px solid var(--error);
}

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