:root {
  color-scheme: light;
  --page: #f7f4fb; --surface: #ffffff; --ink: #111111; --ink-2: #56545e; --muted: #8a8792;
  --border: rgba(70,13,117,0.14); --brand: #931ddd; --brand-escuro: #460d75; --erro: #c62828;
}
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --page: #0f0b14; --surface: #1a1620; --ink: #f3f0f7; --ink-2: #c9c3d3; --muted: #8f8a99;
    --border: rgba(255,255,255,0.12); --brand: #b25ff0; --erro: #ff8a80;
  }
  .logo { filter: invert(1); }
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 24px 16px;
  background: var(--page); background-image: radial-gradient(90% 60% at 100% 0%, rgba(147,29,221,0.14), transparent 60%);
  color: var(--ink); font-family: "Poppins", system-ui, -apple-system, "Segoe UI", sans-serif; }
.caixa { width: 100%; max-width: 380px; background: var(--surface); border: 1px solid var(--border); border-radius: 22px; padding: 36px 30px 30px; text-align: center; }
.logo { height: 56px; width: auto; }
h1 { font-size: 20px; font-weight: 600; margin: 22px 0 4px; }
.sub { color: var(--ink-2); font-size: 14px; margin: 0 0 24px; }
form { text-align: left; }
label { display: block; font-size: 13px; font-weight: 500; color: var(--ink-2); margin-bottom: 6px; }
input { width: 100%; font: inherit; font-size: 20px; letter-spacing: 0.2em; padding: 12px 14px; border: 1.5px solid var(--border); border-radius: 14px;
  background: var(--surface); color: var(--ink); }
input:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(147,29,221,0.18); }
.erro { min-height: 20px; color: var(--erro); font-size: 13px; margin: 8px 0 10px; }
button { width: 100%; font: inherit; font-size: 16px; font-weight: 600; color: #fff; background: var(--brand); border: 0; border-radius: 14px; padding: 13px; cursor: pointer; }
button:hover { background: var(--brand-escuro); }
button:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; }