:root {
  color-scheme: light dark;
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1c1e21;
  --muted: #5f6570;
  --border: #d5d9e0;
  --accent: #1f5fbf;
  --accent-text: #ffffff;
  --danger: #b3261e;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --card: #1e2126;
    --text: #e8eaed;
    --muted: #9aa1ac;
    --border: #363b44;
    --accent: #6ea4f4;
    --accent-text: #10131a;
    --danger: #f2877f;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: 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: 420px;
  padding: 28px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
}

h1 {
  margin: 0 0 4px;
  font-size: 22px;
}

h2 {
  margin: 28px 0 8px;
  font-size: 16px;
}

p {
  margin: 0 0 16px;
  color: var(--muted);
}

label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
}

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

button {
  width: 100%;
  padding: 10px 12px;
  font: inherit;
  font-weight: 600;
  color: var(--accent-text);
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 8px;
  cursor: pointer;
}

button.secondary {
  color: var(--text);
  background: transparent;
  border-color: var(--border);
}

button.small {
  width: auto;
  padding: 4px 10px;
  font-size: 14px;
}

button:disabled {
  opacity: 0.6;
  cursor: default;
}

.divider {
  margin: 16px 0;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}

.message {
  min-height: 24px;
  margin: 12px 0 0;
  color: var(--danger);
}

.message.ok {
  color: var(--muted);
}

ul {
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
}

li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

li small {
  display: block;
  color: var(--muted);
}

.row {
  display: flex;
  gap: 8px;
  margin-top: 20px;
}

[hidden] {
  display: none !important;
}