:root {
  color-scheme: dark;
  --bg: #0f1115;
  --card: #181b22;
  --text: #e6e9ef;
  --muted: #8b93a3;
  --accent: #4f8cff;
  --error: #ff6b6b;
  --ok: #51cf66;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.card {
  width: min(380px, calc(100vw - 32px));
  background: var(--card);
  border-radius: 12px;
  padding: 32px 28px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, .35);
}

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

form { display: flex; flex-direction: column; }

label {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}

input {
  background: var(--bg);
  border: 1px solid #2a2f3a;
  color: var(--text);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 15px;
  margin-bottom: 16px;
}

input:focus {
  outline: none;
  border-color: var(--accent);
}

button {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 11px 14px;
  font-size: 15px;
  cursor: pointer;
}

button:disabled { opacity: .6; cursor: wait; }

.message { min-height: 18px; font-size: 13px; margin: 12px 0 0; text-align: center; }
.message.error { color: var(--error); }
.message.ok { color: var(--ok); }

.alt {
  margin-top: 18px;
  font-size: 13px;
  text-align: center;
  color: var(--muted);
}

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