:root {
  color-scheme: light;
  --bg: #0f172a;
  --panel: #ffffff;
  --accent: #31a7ff;
  --text: #0f172a;
  --muted: #64748b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: 'Segoe UI', sans-serif;
  background: var(--bg);
}

.login .panel {
  background: var(--panel);
  padding: 2.5rem 3rem;
  border-radius: 16px;
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.4);
  width: min(420px, 90vw);
}

.login h1 {
  margin-top: 0;
  margin-bottom: 1.5rem;
  text-align: center;
}

form {
  display: grid;
  gap: 0.75rem;
}

label {
  font-weight: 600;
  color: var(--muted);
}

input[type='email'],
input[type='text'] {
  padding: 0.75rem 1rem;
  border: 1px solid #cbd5f5;
  border-radius: 10px;
  font-size: 1rem;
}

button {
  background: var(--accent);
  color: white;
  border: none;
  padding: 0.85rem 1rem;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

button:hover {
  background: #1d9afd;
}

.hidden {
  display: none;
}

#message {
  margin-top: 1rem;
  min-height: 1.5rem;
  color: var(--muted);
  text-align: center;
}