/* ═══════════════════════════════════════════════════════════
   AUTH.CSS — EstudaAI
   Tela de login / cadastro exibida antes de liberar o app.
   Reaproveita as variáveis de tema definidas em main.css.
   ═══════════════════════════════════════════════════════════ */

#auth-screen {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  padding: 24px;
}

.auth-card {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

.auth-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
}

.auth-logo-img {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
}

.auth-logo .logo-text {
  font-family: "Syne", sans-serif;
  font-size: 22px;
  font-weight: 800;
  color: var(--text);
}

.auth-logo .logo-text span {
  color: var(--accent);
}

.auth-tabs {
  display: flex;
  gap: 6px;
  background: var(--surface2);
  border-radius: var(--radius-sm);
  padding: 4px;
  margin-bottom: 20px;
}

.auth-tab {
  flex: 1;
  padding: 10px;
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-family: "DM Sans", sans-serif;
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.16s;
}

.auth-tab.active {
  background: var(--surface);
  color: var(--accent);
}

.auth-form {
  display: none;
  flex-direction: column;
  gap: 6px;
}

.auth-form.active {
  display: flex;
}

.auth-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-dim);
  margin-top: 10px;
}

.auth-form .inp {
  width: 100%;
}

.auth-hint {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

.auth-submit {
  width: 100%;
  margin-top: 20px;
  padding: 12px;
  font-size: 15px;
}

.auth-error {
  display: none;
  background: rgba(248, 113, 113, 0.12);
  border: 1px solid var(--danger);
  color: var(--danger);
  font-size: 13px;
  padding: 10px 12px;
  border-radius: 10px;
  margin-bottom: 16px;
}

.auth-error.show {
  display: block;
}

/* ── Área do usuário / logout na sidebar ─────────────────── */
.sidebar-user {
  margin-top: auto;
  /* Fica colado no rodapé da sidebar mesmo quando ela rola, então o
     botão "Sair" nunca some em telas baixas. */
  position: sticky;
  bottom: 0;
  background: var(--surface);
  padding-bottom: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-user-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-logout {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-family: "DM Sans", sans-serif;
  font-size: 13px;
  font-weight: 600;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.16s;
}

.sidebar-logout:hover {
  border-color: var(--danger);
  color: var(--danger);
}