:root {
  color-scheme: light;
  --bg: #f4f4f5;
  --card: #ffffff;
  --ink: #18181b;
  --muted: #71717a;
  --line: #e4e4e7;
  --btn: #27272a;
  --btn-text: #fafafa;
  --err: #b91c1c;
}

* { box-sizing: border-box; }

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

.login-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}

.login-card {
  width: min(100%, 22rem);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  padding: 1.75rem;
  display: grid;
  gap: 0.9rem;
}

.login-card h1 {
  margin: 0 0 0.25rem;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.login-card label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.login-card input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  padding: 0.65rem 0.75rem;
  font-size: 0.95rem;
  color: var(--ink);
  background: #fff;
}

.login-card input:focus {
  outline: 2px solid #a1a1aa;
  outline-offset: 1px;
}

.login-card button {
  margin-top: 0.35rem;
  border: 0;
  border-radius: 0.5rem;
  padding: 0.7rem 1rem;
  background: var(--btn);
  color: var(--btn-text);
  font-weight: 600;
  cursor: pointer;
}

.login-card button:hover { filter: brightness(1.08); }
.login-card button:disabled { opacity: 0.6; cursor: wait; }

.error {
  margin: 0;
  color: var(--err);
  font-size: 0.85rem;
}

#app-root[hidden],
#login-root[hidden] {
  display: none !important;
}