:root {
  --bg: #f4f4f2;
  --card: #ffffff;
  --text: #1d1d1b;
  --muted: #66665f;
  --border: #deded8;
  --accent: #1f5f8b;
  --accent-text: #ffffff;
  --error: #b42318;
  --ok: #1a7f37;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161615;
    --card: #20201e;
    --text: #ecece8;
    --muted: #a3a39b;
    --border: #34342f;
    --accent: #5aa3d6;
    --accent-text: #0e1b24;
    --error: #ff8a80;
    --ok: #6fd28a;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 16px;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}

main {
  width: 100%;
  max-width: 380px;
  padding: 32px 28px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
}

h1 { margin: 0 0 4px; font-size: 1.4rem; }
p { margin: 0 0 20px; color: var(--muted); }

label { display: block; margin-bottom: 6px; font-size: 0.9rem; color: var(--muted); }

input {
  width: 100%;
  margin-bottom: 16px;
  padding: 10px 12px;
  font: inherit;
  color: inherit;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
}

button {
  width: 100%;
  padding: 12px;
  font: inherit;
  font-weight: 600;
  color: var(--accent-text);
  background: var(--accent);
  border: 0;
  border-radius: 8px;
  cursor: pointer;
}

button:disabled { opacity: 0.6; cursor: default; }
button:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

#msg { min-height: 1.5em; margin: 16px 0 0; font-size: 0.95rem; }
#msg.error { color: var(--error); }
#msg.ok { color: var(--ok); }
#msg a { color: var(--accent); }

[hidden] { display: none !important; }