body { font-family: system-ui, sans-serif; margin: 0; min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 1.5rem; background: #f5f5f7; }
/* The tilde brand mark (tilde.org), shown above the sign-in card. The ~ glyph rides high in its
   line box, so nudge it down a hair to sit centered in the tile. */
.brand {
  width: 5.5rem; height: 5.5rem; border-radius: 1.4rem;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #3a7bd5, #2d6cdf); color: #fff;
  font-family: ui-monospace, Menlo, monospace; font-size: 4rem; font-weight: 700; line-height: 1;
  box-shadow: 0 6px 20px rgba(58,123,213,0.35); user-select: none; padding-top: 0.35rem; box-sizing: border-box;
}
.login { display: flex; flex-direction: column; gap: 0.75rem; width: 280px; padding: 1.5rem; background: #fff; border-radius: 8px; box-shadow: 0 4px 16px rgba(0,0,0,0.1); }
.login h1 { font-size: 1.2rem; margin: 0 0 0.5rem; }
.login label { display: flex; flex-direction: column; font-size: 0.85rem; color: #555; gap: 0.25rem; }
.login input { padding: 0.5rem; font-size: 1rem; }
.login button { padding: 0.5rem; font-size: 1rem; cursor: pointer; }
#error { color: #c33; margin: 0; }