:root {
  --bg: #f4f6f8;
  --panel: #ffffff;
  --text: #17202a;
  --muted: #667085;
  --line: #d9e0e8;
  --blue: #1565d8;
  --red: #b42318;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 18px;
}

.auth-card {
  width: min(420px, 100%);
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  box-shadow: 0 18px 48px rgba(16, 24, 40, 0.12);
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 13px;
}

h1 {
  margin: 0 0 20px;
  font-size: 24px;
}

label {
  display: grid;
  gap: 6px;
  margin-bottom: 14px;
  color: var(--muted);
  font-weight: 700;
}

input {
  width: 100%;
  min-height: 46px;
  padding: 0 12px;
  border: 1px solid #c7d0dc;
  border-radius: 10px;
  font: inherit;
}

button {
  width: 100%;
  min-height: 48px;
  border: 0;
  border-radius: 10px;
  background: var(--blue);
  color: #fff;
  font: inherit;
  font-weight: 900;
}

button:disabled {
  opacity: 0.65;
}

.message {
  min-height: 20px;
  margin: 12px 0 0;
  color: var(--red);
  text-align: center;
}