/*
  Login Modern UI
  - Preserva funcionalidade do backend
  - Modular, performance-optimized e com fallbacks
  Dependências adicionais:
    - Animate.css (CDN) para animações discretas: fadeIn e shake
  Observações:
    - Respeita prefers-reduced-motion
    - Fallback para navegadores sem suporte a backdrop-filter
*/

/* Paleta e tokens */
:root {
  --login-primary: var(--bs-primary, #0d6efd);
  --login-bg-start: #f5f7fb;
  --login-bg-end: #eef1f5;
  --login-accent-1: rgba(13, 110, 253, 0.08);
  --login-accent-2: rgba(32, 201, 151, 0.08);
  --login-card-bg: rgba(255, 255, 255, 0.88);
  --login-card-border: rgba(0, 0, 0, 0.06);
  --login-text: #1f2937;
  --login-muted: #6b7280;
}

@media (prefers-color-scheme: dark) {
  :root {
    --login-bg-start: #0e1117;
    --login-bg-end: #1b1f24;
    --login-card-bg: rgba(28, 32, 38, 0.8);
    --login-card-border: rgba(255, 255, 255, 0.08);
    --login-text: #e5e7eb;
    --login-muted: #9ca3af;
  }
}

/* Layout base */
body#page-login {
  min-height: 100vh;
  color: var(--login-text);
  background:
    radial-gradient(1200px circle at 10% 10%, var(--login-accent-1), transparent 60%),
    radial-gradient(900px circle at 85% 85%, var(--login-accent-2), transparent 60%),
    linear-gradient(135deg, var(--login-bg-start), var(--login-bg-end));
}

.login-wrapper {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-container {
  width: 100%;
  max-width: 420px;
}

.card-login {
  background: var(--login-card-bg);
  border: 1px solid var(--login-card-border);
  border-radius: 18px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
  overflow: hidden;
}

@supports (backdrop-filter: blur(12px)) {
  .card-login {
    backdrop-filter: blur(12px);
  }
}

.card-login.no-backdrop {
  background: rgba(255, 255, 255, 0.98);
}

.card-login .card-header {
  background: transparent;
  border: 0;
  padding: 28px 28px 0 28px;
}

.brand-area {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-area img {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.brand-title {
  font-weight: 600;
  font-size: 20px;
}

.card-login .card-body {
  padding: 24px 28px 28px 28px;
}

.subtitle {
  color: var(--login-muted);
  font-size: 14px;
  margin-bottom: 18px;
}

/* Form controls */
.form-control {
  border-radius: 12px;
  border: 1px solid var(--login-card-border);
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.9);
  transition: border-color 120ms ease, box-shadow 120ms ease, background 120ms ease;
}

.form-control:hover {
  background: rgba(255, 255, 255, 1);
}

.form-control:focus {
  border-color: var(--login-primary);
  box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.15);
  outline: none;
}

.input-label {
  font-size: 13px;
  color: var(--login-muted);
  margin-bottom: 6px;
}

.form-floating > label {
  color: var(--login-muted);
}

/* Botões */
.btn-primary {
  border-radius: 12px;
  padding: 12px 16px;
  font-weight: 600;
  letter-spacing: 0.2px;
  background: linear-gradient(90deg, var(--login-primary), color-mix(in srgb, var(--login-primary) 85%, #fff 15%));
  box-shadow: 0 10px 20px rgba(13, 110, 253, 0.15);
  transition: transform 120ms ease, box-shadow 120ms ease, filter 120ms ease, opacity 120ms ease;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 30px rgba(13, 110, 253, 0.2);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 8px 16px rgba(13, 110, 253, 0.18);
}

.btn-primary.loading,
.btn-primary[aria-busy="true"] {
  position: relative;
  pointer-events: none;
  opacity: 0.9;
}

.btn-primary.loading::after,
.btn-primary[aria-busy="true"]::after {
  content: "";
  position: absolute;
  right: 14px;
  top: 50%;
  width: 16px;
  height: 16px;
  margin-top: -8px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.9);
  border-top-color: transparent;
  animation: spin 600ms linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Links utilitários */
.helper-links {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
}

.helper-links a {
  color: var(--login-primary);
  text-decoration: none;
}

.helper-links a:hover {
  text-decoration: underline;
}

/* Alertas */
.alert {
  border-radius: 12px;
}

/* Animações de entrada suaves */
.fade-in-up {
  animation: fadeInUp 380ms ease both;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translate3d(0, 8px, 0); }
  to   { opacity: 1; transform: translate3d(0, 0, 0); }
}

/* Fallback para reduzido movimento */
@media (prefers-reduced-motion: reduce) {
  .fade-in-up,
  .btn-primary,
  .btn-primary::after {
    animation: none !important;
    transition: none !important;
  }
}

/* Pequenas melhorias responsivas */
@media (max-width: 420px) {
  .login-container { max-width: 100%; }
  .card-login .card-body { padding: 20px; }
}