/* ===== VARIÁVEIS - PALETA DE CORES PRIMÁRIAS ===== */
:root {
  --vermelho: #BE1311;
  --amarelo: #F9CD0A;
  --azul: #182E5F;
  --laranja: #E4641D;
  --branco: #FFFFFF;
  --cinza-claro: #F8F9FA;
  --cinza-medio: #E9ECEF;
  --cinza-escuro: #495057;
  --preto: #182E5F;
}

/* ===== RESET E BASE ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ===== BOTÃO VOLTAR FIXO ===== */
.back-btn-fixed{
  position: fixed;
  top: 40px;
  left: 20px;
  z-index: 1500;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background: var(--branco);
  color: var(--preto);
  border: 2px solid var(--cinza-medio);
  border-radius: 50%;
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  font-size: 1.2rem;
  transition: all 0.3s ease;
  padding: 0 !important;
  gap: 0 !important;
  min-width: 50px !important;
  min-height: 50px !important;
}

.back-btn-fixed:hover{
  background: var(--vermelho);
  color: var(--branco);
  border-color: var(--vermelho);
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 12px 32px rgba(190, 19, 17, 0.3);
}

@media (max-width: 480px){
  .back-btn-fixed{ top: 10px; left: 10px; width: 45px; height: 45px; font-size: 1.1rem; }
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, var(--azul) 0%, var(--preto) 100%);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 20px;
  position: relative;
  overflow: hidden;
}

/* ===== LOGO NO TOPO ===== */
.logo {
  position: absolute;
  top: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  max-width: 300px;
  width: 80%;
}

.logo img {
  width: 100%;
  height: auto;
  display: block;
}

/* ===== CONTAINER PRINCIPAL ===== */
.container {
  background-color: var(--branco);
  padding: 3rem;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  width: 100%;
  max-width: 450px;
  position: relative;
  z-index: 10;
  animation: slideUp 0.6s ease;
}

@keyframes slideUp {
  from {
      opacity: 0;
      transform: translateY(30px);
  }
  to {
      opacity: 1;
      transform: translateY(0);
  }
}

/* ===== SÍMBOLOS DECORATIVOS ===== */
.symbol {
  width: 60px;
  height: 60px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 5px;
}

.symbol-circle {
  border-radius: 50%;
  background: var(--amarelo);
  animation: pulse 2s ease-in-out infinite;
}

.symbol-square {
  background: var(--vermelho);
  animation: rotate 4s linear infinite;
}

.symbol-star {
  background: var(--laranja);
  clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.1); opacity: 0.8; }
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ===== TÍTULOS ===== */
h1 {
  color: var(--preto);
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: 0.5px;
}

/* ===== DIVISOR ===== */
.divider {
  width: 100%;
  height: 3px;
  background: var(--cinza-medio);
  margin: 1.5rem 0;
  border-radius: 2px;
}

.divider-red {
  background: linear-gradient(90deg, var(--vermelho) 0%, var(--laranja) 100%);
}

.divider-blue {
  background: var(--azul);
}

/* ===== FORMULÁRIO ===== */
form {
  width: 100%;
}

.form-group {
  margin-bottom: 1.5rem;
}

/* ===== LABELS ===== */
.form-group label {
  display: block;
  color: var(--preto);
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
  letter-spacing: 0.3px;
}

/* ===== INPUTS ===== */
.form-input {
  width: 100%;
  padding: 1rem 1.2rem;
  border: 2px solid var(--cinza-medio);
  border-radius: 12px;
  font-size: 1rem;
  color: var(--preto);
  background-color: var(--cinza-claro);
  transition: all 0.3s ease;
  outline: none;
  font-family: inherit;
}

.form-input:focus {
  border-color: var(--azul);
  background-color: var(--branco);
  box-shadow: 0 0 0 4px rgba(24, 46, 95, 0.1);
  transform: translateY(-2px);
}

.form-input::placeholder {
  color: var(--cinza-escuro);
  opacity: 0.6;
}

/* ===== BOTÕES ===== */
.btn {
  padding: 1.2rem 2rem;
  border: none;
  border-radius: 12px;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s ease;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-family: inherit;
}

.btn-primary {
  width: 100%;
  background: linear-gradient(135deg, var(--vermelho) 0%, var(--laranja) 100%);
  color: var(--branco);
  box-shadow: 0 8px 20px rgba(190, 19, 17, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(190, 19, 17, 0.4);
  background: linear-gradient(135deg, var(--laranja) 0%, var(--vermelho) 100%);
}

.btn-primary:active {
  transform: translateY(-1px);
  box-shadow: 0 6px 15px rgba(190, 19, 17, 0.3);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--azul) 0%, var(--preto) 100%);
  color: var(--branco);
  box-shadow: 0 8px 20px rgba(24, 46, 95, 0.3);
}

.btn-secondary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(24, 46, 95, 0.4);
}

.btn-accent {
  background: var(--amarelo);
  color: var(--preto);
  box-shadow: 0 8px 20px rgba(249, 205, 10, 0.3);
}

.btn-accent:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(249, 205, 10, 0.4);
  background: var(--amarelo);
}

.btn-full {
  width: 100%;
  margin-top: 1rem;
}

/* ===== MENSAGEM DE ERRO ===== */
.error-message {
  margin-top: 1rem;
  padding: 1rem 1.5rem;
  background-color: rgba(190, 19, 17, 0.1);
  border-left: 4px solid var(--vermelho);
  border-radius: 8px;
  animation: shake 0.5s ease;
}

.error-message p {
  color: var(--vermelho);
  font-weight: 600;
  margin: 0;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-10px); }
  75% { transform: translateX(10px); }
}

/* ===== LINKS ===== */
a {
  color: var(--azul);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  border-bottom: 2px solid transparent;
}

a:hover {
  color: var(--vermelho);
  border-bottom-color: var(--vermelho);
}

/* ===== UTILITÁRIOS ===== */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.spacing-small {
  margin: 1rem 0;
}

.spacing-medium {
  margin: 2rem 0;
}

.spacing-large {
  margin: 3rem 0;
}

/* ===== CARDS ===== */
.card {
  background: white;
  padding: 2rem;
  margin: 1.5rem 0;
  border-left: 4px solid var(--vermelho);
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.card.blue {
  border-left-color: var(--azul);
}

.card.yellow {
  border-left-color: var(--amarelo);
}

.card.orange {
  border-left-color: var(--laranja);
}

/* ===== GRID ===== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

/* ===== SEÇÕES COM CORES ===== */
.section {
  padding: 4rem 2rem;
  border-radius: 20px;
  margin: 2rem 0;
}

.section-red {
  background: linear-gradient(135deg, var(--vermelho) 0%, var(--laranja) 100%);
  color: var(--branco);
}

.section-blue {
  background: linear-gradient(135deg, var(--azul) 0%, var(--preto) 100%);
  color: var(--branco);
}

.section-yellow {
  background: var(--amarelo);
  color: var(--preto);
}

/* ===== FOCO ACESSÍVEL ===== */
input:focus-visible,
button:focus-visible,
a:focus-visible {
  outline: 3px solid var(--amarelo);
  outline-offset: 2px;
}

/* ===== RESPONSIVIDADE ===== */
@media (max-width: 480px) {
  .container {
      padding: 2rem 1.5rem;
  }

  h1 {
      font-size: 1.75rem;
  }

  .form-group label {
      font-size: 0.9rem;
  }

  .form-input {
      padding: 0.9rem 1rem;
      font-size: 0.95rem;
  }

  .btn {
      padding: 1rem;
      font-size: 1rem;
  }

  .symbol {
      width: 50px;
      height: 50px;
      margin: 3px;
  }

  body::before,
  body::after {
      width: 250px;
      height: 250px;
  }

  .grid {
      grid-template-columns: 1fr;
      gap: 1.5rem;
  }

  .section {
      padding: 3rem 1.5rem;
  }
}