:root {
  --bg: #ffffff;
  --card: #ffffff;
  --primary: #151515;
  --text: #151515;
  --muted: #5b5b5b;
  --error: #b42318;
  --border: #dcdcdc;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family:
    Inter,
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    Roboto,
    Helvetica,
    Arial,
    sans-serif;
  min-height: 100vh;
  background: var(--bg);
  display: grid;
  place-items: center;
  color: var(--text);
}

.card {
  width: min(440px, calc(100vw - 32px));
  background: var(--card);
  border: 0;
  border-radius: 16px;
  box-shadow: none;
  padding: 28px;
}

h1 {
  margin: 0 0 6px;
  font-size: 28px;
}

p {
  margin: 0 0 20px;
  color: var(--muted);
}

label {
  display: block;
  margin-bottom: 14px;
  font-size: 14px;
}

input {
  width: 100%;
  margin-top: 6px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  font-size: 16px;
}

input:focus {
  outline: 2px solid rgba(0, 0, 0, 0.1);
  border-color: var(--primary);
}

button {
  width: 100%;
  border: 0;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  padding: 12px;
  font-size: 16px;
  cursor: pointer;
}

button[disabled] {
  opacity: 0.65;
  cursor: not-allowed;
}

.muted-btn {
  margin-top: 10px;
  background: transparent;
  color: var(--primary);
  text-decoration: underline;
}

.error {
  color: var(--error);
  font-size: 14px;
  margin: 0 0 14px;
  min-height: 20px;
}

.hidden {
  display: none;
}