:root {
  /* Usando a paleta unificada do sistema */
  --primary-blue: #2563eb;
  --primary-red: #dc2626;
  --secondary-blue: #3b82f6;
  --secondary-red: #ef4444;
  --dark-blue: #1e40af;
  --dark-red: #b91c1c;
  --light-blue: #dbeafe;
  --light-red: #fee2e2;
  
  /* Cores neutras */
  --white: #ffffff;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  /* Gradientes */
  --gradient-primary: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-red) 100%);
  --gradient-secondary: linear-gradient(135deg, var(--secondary-blue) 0%, var(--secondary-red) 100%);
  --gradient-light: linear-gradient(135deg, var(--light-blue) 0%, var(--light-red) 100%);

  /* Sombras */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 16px -2px rgba(0, 0, 0, 0.1), 0 4px 8px -2px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Espaçamentos */
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Bordas */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Cores específicas para login */
  --azul-escuro: var(--gray-900);
  --azul: var(--primary-blue);
  --azul-claro: var(--secondary-blue);
  --vermelho: var(--primary-red);
  --vermelho-escuro: var(--dark-red);
  --fundo: var(--gray-900);
  --card-bg: var(--gray-800);
  --borda: rgba(255, 255, 255, 0.08);
  --texto: var(--gray-200);
  --texto-suave: var(--gray-400);
  --erro: var(--light-red);
  --sucesso: #86efac;
  --focus-ring: 0 0 0 4px rgba(59, 130, 246, 0.35);
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--texto);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(37, 99, 235, 0.25), transparent 60%),
    radial-gradient(1000px 500px at 110% 10%, rgba(220, 38, 38, 0.25), transparent 60%),
    linear-gradient(180deg, var(--gray-900) 0%, var(--fundo) 100%);
}

.page {
  min-height: 100dvh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  place-items: center;
  padding: 24px;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  user-select: none;
}

.brand__logo {
  font-size: 28px;
}

.brand__title {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.2px;
  background: linear-gradient(90deg, var(--azul-claro), var(--vermelho));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.card {
  width: 100%;
  max-width: 580px;
  background: linear-gradient(180deg, rgba(59, 130, 246, 0.08), rgba(220, 38, 38, 0.08)) padding-box,
              linear-gradient(180deg, rgba(59, 130, 246, 0.45), rgba(220, 38, 38, 0.45)) border-box,
              var(--card-bg);
  border: 1px solid transparent;
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.35), 0 1px 0 rgba(255,255,255,0.03) inset;
}

.card__title {
  margin: 0 0 12px 0;
  font-size: 20px;
  font-weight: 700;
  text-align: center;
  flex: 1;
}

.field { margin-top: 14px; }

.field label {
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
  color: var(--texto-suave);
}

.field input[type="text"],
.field input[type="email"],
.field input[type="password"],
.field input[type="tel"],
.field select,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--borda);
  background: rgba(255,255,255,0.02);
  color: var(--texto);
  outline: none;
  transition: border-color 180ms ease, box-shadow 180ms ease, background 180ms ease;
  font-family: inherit;
  resize: vertical;
}

.password-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.password-wrapper input[type="password"],
.password-wrapper input[type="text"] {
  padding-right: 42px;
}

.password-toggle {
  position: absolute;
  right: 8px;
  background: none;
  border: none;
  color: var(--texto-suave);
  cursor: pointer;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 180ms ease;
}

.password-toggle:hover {
  color: var(--azul-claro);
}

.field input::placeholder,
.field textarea::placeholder { color: #9aa4b2; }

.field input:hover,
.field select:hover,
.field textarea:hover { background: rgba(255,255,255,0.04); }

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--azul-claro);
  box-shadow: var(--focus-ring);
}

.btn {
  margin-top: 16px;
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  border-radius: 12px;
  padding: 12px 16px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 180ms ease, background 180ms ease;
}

.btn--primary {
  background: linear-gradient(90deg, var(--azul-claro), var(--vermelho));
  color: white;
  box-shadow: 0 8px 20px rgba(59,130,246,0.25), 0 8px 20px rgba(220,38,38,0.2);
}

.btn--primary:hover { filter: brightness(1.06); }

.btn--primary:active { transform: translateY(1px); }

.link {
  color: var(--azul-claro);
  text-decoration: none;
}

.link:hover { text-decoration: underline; }

.hint {
  margin: 16px 0 0 0;
  font-size: 14px;
  color: var(--texto-suave);
  text-align: center;
}

.footer {
  opacity: 0.9;
  font-size: 12px;
}

/* Estilos específicos para validação */
.field input:invalid:not(:focus):not(:placeholder-shown),
.field select:invalid:not(:focus) {
  border-color: var(--erro);
}

.field input:valid:not(:focus):not(:placeholder-shown),
.field select:valid:not(:focus) {
  border-color: var(--sucesso);
}

/* Animações */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.field--error input,
.field--error select {
  animation: shake 0.5s ease-in-out;
}

/* Responsividade melhorada */
@media (max-width: 480px) {
  .page {
    padding: 16px;
  }
  
  .card {
    padding: 20px;
  }
}