/* Enough to make the skeleton legible, and no design decisions beyond that -
   they belong to the application, not to the boilerplate. */
:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #2563eb;
  --error: #b91c1c;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111318;
    --fg: #e8e8ea;
    --muted: #9ca3af;
    --line: #2a2e37;
    --accent: #60a5fa;
    --error: #f87171;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--line);
}

.brand { font-weight: 600; text-decoration: none; color: var(--fg); }
.topbar nav a { color: var(--muted); text-decoration: none; margin-left: 1rem; }
.topbar nav a:hover { color: var(--fg); }

.content { max-width: 60rem; margin: 0 auto; padding: 2rem 1.25rem; }

.card {
  max-width: 26rem;
  margin: 3rem auto;
  padding: 1.75rem;
  border: 1px solid var(--line);
  border-radius: 10px;
}

.card h1 { margin: 0 0 1.25rem; font-size: 1.35rem; }

label { display: block; margin-bottom: 1rem; color: var(--muted); font-size: 0.9rem; }

input {
  display: block;
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg);
  color: var(--fg);
  font-size: 1rem;
}

input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

button {
  width: 100%;
  padding: 0.65rem 1rem;
  border: 0;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
}

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

.error { color: var(--error); font-size: 0.9rem; }

.divider {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 1.25rem 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.divider::before,
.divider::after {
  content: "";
  flex: 1;
  border-top: 1px solid var(--line);
}

.button-secondary {
  display: block;
  padding: 0.65rem 1rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--fg);
  font-size: 1rem;
  text-align: center;
  text-decoration: none;
}

.button-secondary:hover { border-color: var(--accent); }

pre {
  overflow-x: auto;
  padding: 0.75rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 0.85rem;
}