:root {
  --cor-fundo: #f8fafc;
  --cor-container: #ffffff;
  --cor-borda: #e2e8f0;
  --cor-texto: #1e293b;
  --cor-texto-secundario: #64748b;
  --cor-primaria: #3b82f6;
  --cor-primaria-hover: #2563eb;
  --sombra: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --transicao: all 0.3s ease;
}

.tema-escuro {
  --cor-fundo: #0f172a;
  --cor-container: #1e293b;
  --cor-borda: #334155;
  --cor-texto: #f1f5f9;
  --cor-texto-secundario: #cbd5e1;
  --cor-primaria: #60a5fa;
  --cor-primaria-hover: #3b82f6;
  --sombra: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
}

* {
  box-sizing: border-box;
}

body {
  background: var(--cor-fundo);
  color: var(--cor-texto);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  margin: 0;
  padding: 20px;
  min-height: 100vh;
  transition: var(--transicao);
  line-height: 1.6;
}

.header {
  text-align: center;
  margin-bottom: 40px;
}

.logo {
  width: 150px;
  height: 150px;
  object-fit: cover;
  margin-bottom: 20px;
  transition: var(--transicao);
  border-radius: 12px;
/*  box-shadow: var(--sombra);*/
}

.logo:hover {
  transform: scale(1.05);
}

.container {
  max-width: 800px;
  margin: 0 auto;
  background: var(--cor-container);
  padding: 32px;
  border-radius: 16px;
  box-shadow: var(--sombra);
  border: 1px solid var(--cor-borda);
  transition: var(--transicao);
}

.titulo-secao {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

h1 {
  font-size: 2rem;
  font-weight: 600;
  margin: 0;
  color: var(--cor-texto);
  display: flex;
  align-items: center;
  gap: 12px;
}

.descricao {
  color: var(--cor-texto-secundario);
  margin-bottom: 32px;
  font-size: 1.1rem;
  text-align: left;
}

.formulario {
  display: grid;
  gap: 24px;
}

.campo-grupo {
  display: grid;
  gap: 8px;
  position: relative;
}

label {
  font-weight: 500;
  color: var(--cor-texto);
  font-size: 0.95rem;
}

textarea {
  width: 100%;
  padding: 16px;
  font-size: 16px;
  border: 2px solid var(--cor-borda);
  border-radius: 12px;
  background: var(--cor-fundo);
  color: var(--cor-texto);
  transition: var(--transicao);
  font-family: inherit;
  resize: vertical;
  min-height: 120px;
}

textarea:focus {
  outline: none;
  border-color: var(--cor-primaria);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

textarea:read-only {
  background: var(--cor-borda);
  cursor: default;
  opacity: 0.8;
}

.botoes-formatacao {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin: 20px 0;
}

.botao {
  background: linear-gradient(135deg, var(--cor-primaria), var(--cor-primaria-hover));
  color: white;
  border: none;
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 500;
  border-radius: 12px;
  cursor: pointer;
  transition: var(--transicao);
  font-family: inherit;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 56px;
  text-align: center;
}

.botao:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}

.botao:active {
  transform: translateY(0);
}

.controle-tema {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--cor-fundo);
  padding: 8px 16px;
  border-radius: 50px;
  border: 1px solid var(--cor-borda);
}

.tema-label {
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--cor-texto-secundario);
}

.switch {
  position: relative;
  display: inline-block;
  width: 52px;
  height: 28px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--cor-borda);
  transition: var(--transicao);
  border-radius: 28px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 22px;
  width: 22px;
  left: 3px;
  bottom: 3px;
  background: white;
  transition: var(--transicao);
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

input:checked + .slider {
  background: var(--cor-primaria);
}

input:checked + .slider:before {
  transform: translateX(24px);
}

.botao-copiar {
  background: transparent;
  border: 2px solid var(--cor-primaria);
  color: var(--cor-primaria);
  padding: 10px 20px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: var(--transicao);
  margin-top: 12px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  justify-self: start;
}

.botao-copiar:hover {
  background: var(--cor-primaria);
  color: white;
  transform: translateY(-1px);
}

.feedback {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--cor-primaria);
  color: white;
  padding: 12px 20px;
  border-radius: 8px;
  box-shadow: var(--sombra);
  transform: translateX(100%);
  transition: var(--transicao);
  z-index: 1000;
}

.feedback.mostrar {
  transform: translateX(0);
}

.feedback i {
  margin-right: 8px;
}

/* Responsividade */
@media (max-width: 768px) {
  body {
    padding: 12px;
  }

  .container {
    padding: 24px 20px;
  }

  .titulo-secao {
    flex-direction: column;
    text-align: center;
    gap: 20px;
  }

  h1 {
    font-size: 1.6rem;
  }

  .logo {
    width: 120px;
    height: 120px;
  }

  .descricao {
    font-size: 1rem;
    text-align: center;
  }

  .botoes-formatacao {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .botao {
    padding: 14px 16px;
    min-height: 50px;
    font-size: 14px;
  }

  .feedback {
    right: 10px;
    top: 10px;
    font-size: 14px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 20px 16px;
  }

  h1 {
    font-size: 1.4rem;
    flex-direction: column;
    gap: 8px;
  }

  .logo {
    width: 100px;
    height: 100px;
  }

  .controle-tema {
    padding: 6px 12px;
  }

  textarea {
    padding: 12px;
    font-size: 16px;
  }

  .botao {
    padding: 12px 14px;
    gap: 6px;
  }
}

/* Estados especiais */
.erro {
  border-color: #ef4444 !important;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1) !important;
}

.loading {
  opacity: 0.7;
  pointer-events: none;
}

/* Animações */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.container {
  animation: fadeIn 0.5s ease-out;
}

/* Melhor acessibilidade */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Melhor contraste para modo escuro */
.tema-escuro .botao-copiar {
  border-color: var(--cor-primaria);
  color: var(--cor-primaria);
}

.tema-escuro .botao-copiar:hover {
  background: var(--cor-primaria);
  color: white;
}