:root {
  --bg: #f4f4f6;
  --fg: #1a1a1a;
  --muted: #6b6b70;
  --accent: #0a7f5f;
  --error: #b22222;
  --card-bg: #ffffff;
  --border: #d9d9dd;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem 1rem;
}

.login-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2.5rem 2rem;
  width: min(420px, 100%);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.06);
}

.login-card h1 {
  margin: 0 0 0.25rem;
  font-size: 1.5rem;
  letter-spacing: -0.01em;
}

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

.login-card label {
  display: block;
  margin-bottom: 1rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.login-card input {
  display: block;
  width: 100%;
  padding: 0.6rem 0.75rem;
  margin-top: 0.35rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  color: var(--fg);
  background: #fff;
}

.login-card input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.login-card button {
  width: 100%;
  padding: 0.7rem;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  font-size: 1rem;
}

.login-card button:hover { filter: brightness(1.05); }

.error-banner {
  background: #fdecec;
  color: var(--error);
  border: 1px solid #f4c2c2;
  padding: 0.6rem 0.8rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.muted { color: var(--muted); }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.9em; }
a { color: var(--accent); }