/* Página de login (login.html). Usa os tokens de design-system.css.
   Sem script nem estilo inline: compatível com a CSP planejada. O tema segue a preferência do sistema. */

.auth-body {
  box-sizing: border-box;
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  padding: 24px 16px;
  background:
    radial-gradient(900px 500px at 15% -10%, rgba(139, 92, 246, 0.28), transparent 60%),
    radial-gradient(700px 480px at 100% 110%, rgba(56, 189, 248, 0.14), transparent 60%),
    var(--bg, #070a13);
  color: var(--ink, #f8fafc);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

.auth-card {
  width: min(420px, 100%);
  box-sizing: border-box;
  padding: 32px 28px 28px;
  border: 1px solid var(--card-border, rgba(139, 92, 246, 0.2));
  border-radius: var(--radius, 18px);
  background: linear-gradient(180deg, var(--card-1, rgba(13, 16, 32, 0.96)), var(--card-2, rgba(7, 10, 19, 0.97)));
  box-shadow: var(--shadow-card, 0 18px 46px rgba(0, 0, 0, 0.22));
}

/* Marca: símbolo + logotipo (classes .brand-* em design-system.css); 1em = altura do logotipo. */
.auth-brand {
  margin: 0;
  font-size: 30px;
  line-height: 1;
  color: var(--ink, #f8fafc);
}

.auth-tagline {
  margin: 6px 0 22px;
  color: var(--muted, #94a3b8);
  font-size: 14px;
}

.auth-stack {
  display: grid;
}

/* Troca de formulário (login.js): os dois ficam na mesma célula da grade.
   - align-self: start: cada formulário mantém a própria altura. Sem isso o mais baixo era esticado até a altura do
     mais alto durante a troca, os campos se espaçavam e "pulavam" de volta quando o outro sumia.
   - Crossfade simultâneo: o que sai só esmaece, parado (não disputa atenção com o que entra); o que entra aparece
     com curva de desaceleração e uma subida curta. A soma dos dois nunca deixa o cartão vazio (sem "pisque").
     A altura do cartão acompanha na mesma curva. */
.auth-form {
  display: grid;
  gap: 14px;
  transition: opacity 240ms cubic-bezier(0.2, 0, 0, 1), transform 280ms cubic-bezier(0.2, 0, 0, 1);
}

.auth-stack > .auth-form {
  grid-area: 1 / 1;
  align-self: start;
}

.auth-form.is-leaving {
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease;
}

.auth-form.is-entering {
  opacity: 0;
  transform: translateY(4px);
  transition: none;
}

.auth-form[hidden],
.auth-message[hidden] {
  display: none;
}

.auth-card {
  overflow: hidden;
  transition: height 280ms cubic-bezier(0.2, 0, 0, 1);
}

.auth-message:not([hidden]) {
  animation: auth-message-in 200ms ease both;
}

@keyframes auth-message-in {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .auth-form,
  .auth-card { transition: none; }
  .auth-form.is-leaving { transition: none; }
  .auth-message:not([hidden]) { animation: none; }
}

.auth-form h2 {
  margin: 0 0 2px;
  font-size: 19px;
  font-weight: 650;
}

.auth-help {
  margin: 0;
  color: var(--muted, #94a3b8);
  font-size: 14px;
  line-height: 1.4;
}

.auth-form label {
  display: grid;
  gap: 6px;
  color: var(--text-secondary, #cbd5e1);
  font-size: 13px;
  font-weight: 600;
}

.auth-form label small {
  color: var(--text-muted, #64748b);
  font-weight: 500;
}

.auth-form input {
  box-sizing: border-box;
  width: 100%;
  height: 42px;
  padding: 0 12px;
  border: 1px solid var(--card-border, rgba(139, 92, 246, 0.2));
  border-radius: var(--radius-md, 8px);
  background: var(--surface-soft, rgba(7, 10, 19, 0.5));
  color: var(--ink, #f8fafc);
  font: inherit;
  font-size: 15px;
}

.auth-form input:focus-visible,
.auth-primary:focus-visible,
.auth-link:focus-visible {
  outline: 2px solid rgba(139, 92, 246, 0.7);
  outline-offset: 2px;
}

.auth-primary {
  height: 44px;
  border: 0;
  border-radius: var(--radius-md, 8px);
  background: linear-gradient(90deg, #7c3aed, #6d28d9);
  color: #fff;
  font: inherit;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}

.auth-primary:disabled {
  opacity: 0.6;
  cursor: progress;
}

.auth-links {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.auth-link {
  padding: 4px 0;
  border: 0;
  background: none;
  color: var(--primary, #8b5cf6);
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

.auth-message {
  margin: 0 0 16px;
  padding: 10px 12px;
  border-radius: var(--radius-md, 8px);
  font-size: 14px;
  line-height: 1.4;
  border: 1px solid rgba(244, 63, 94, 0.4);
  background: rgba(244, 63, 94, 0.1);
  color: #fecdd3;
}

.auth-message[data-kind="info"] {
  border-color: rgba(34, 197, 94, 0.4);
  background: rgba(34, 197, 94, 0.1);
  color: #bbf7d0;
}

/* O "Sair" mora no menu da conta (#accountMenu, CS-2; estilos em mobile-shell.css). O interruptor de tema é criado por JS
   em .topbar e assume o espaço livre à esquerda (margin-left: auto), de modo que tema, divisória e botão da conta ficam
   juntos na borda direita. */
.topbar > .theme-toggle {
  margin-left: auto;
}

@media (prefers-color-scheme: light) {
  .auth-body {
    --brand-goal: #7c3aed;
    --brand-trail: #8b5cf6;
    --brand-now: #0ea5e9;
    background:
      radial-gradient(900px 500px at 15% -10%, rgba(139, 92, 246, 0.16), transparent 60%),
      radial-gradient(700px 480px at 100% 110%, rgba(56, 189, 248, 0.1), transparent 60%),
      #f6f3fd;
    color: #1e1b2e;
  }
  .auth-brand { color: #1a1530; }
  .auth-card {
    background: #fff;
    border-color: rgba(139, 92, 246, 0.22);
    box-shadow: 0 18px 46px rgba(66, 48, 96, 0.12);
  }
  .auth-tagline,
  .auth-help,
  .auth-form label small { color: #6b6480; }
  .auth-form label { color: #3b3550; }
  .auth-form input { background: #faf8ff; color: #1e1b2e; border-color: rgba(139, 92, 246, 0.28); }
  .auth-message { color: #9f1239; background: rgba(244, 63, 94, 0.08); }
  .auth-message[data-kind="info"] { color: #166534; background: rgba(34, 197, 94, 0.1); }
}