:root {
  color-scheme: light;
  --bg: #f8fafc;
  --panel: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --line: #d7dee8;
  --accent: #0f766e;
  --error: #b91c1c;
}

* { box-sizing: border-box; }

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

.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 28px;
}

section {
  width: min(460px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px;
  box-shadow: 0 18px 50px rgba(15, 23, 42, .08);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: 36px;
  line-height: 1.05;
}

.copy {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.55;
}

form {
  display: grid;
  gap: 16px;
  margin-top: 22px;
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-weight: 700;
}

input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px 13px;
  color: var(--text);
  font: inherit;
}

button {
  border: 0;
  border-radius: 6px;
  padding: 13px 16px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

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

.error {
  margin-top: 18px;
  border: 1px solid rgba(185, 28, 28, .32);
  border-radius: 6px;
  padding: 12px;
  color: var(--error);
  background: rgba(185, 28, 28, .07);
}

.panel {
  margin-top: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  color: var(--muted);
  background: #f8fafc;
}

.switch {
  margin: 20px 0 0;
}