:root {
  --cor-fundo: #f8fafc;
  --cor-container: #ffffff;
  --cor-borda: #e2e8f0;
  --cor-texto: #1e293b;
  --cor-texto-secundario: #64748b;
  --cor-primaria: #ff0000;
  --cor-primaria-hover: #cc0000;
  --cor-youtube: #ff0000;
  --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: #ff4444;
  --cor-primaria-hover: #ff6666;
  --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);
  filter: drop-shadow(0 4px 8px rgba(255, 0, 0, 0.2));
}

.logo:hover {
  transform: scale(1.05);
  filter: drop-shadow(0 6px 12px rgba(255, 0, 0, 0.3));
}

.container {
  max-width: 900px;
  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;
}

h1 i {
  color: var(--cor-youtube);
}

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

.formulario {
  display: grid;
  gap: 20px;
}

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

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

input[type="text"] {
  width: 100%;
  padding: 14px 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;
}

input[type="text"]:focus {
  outline: none;
  border-color: var(--cor-primaria);
  box-shadow: 0 0 0 3px rgba(255, 0, 0, 0.1);
}

input[type="text"]:read-only {
  background: var(--cor-borda);
  cursor: default;
}

textarea {
  width: 100%;
  padding: 14px 16px;
  font-size: 14px;
  border: 2px solid var(--cor-borda);
  border-radius: 12px;
  background: var(--cor-fundo);
  color: var(--cor-texto);
  transition: var(--transicao);
  font-family: 'Courier New', monospace;
  resize: vertical;
  min-height: 100px;
}

textarea:focus {
  outline: none;
  border-color: var(--cor-primaria);
  box-shadow: 0 0 0 3px rgba(255, 0, 0, 0.1);
}

textarea:read-only {
  background: var(--cor-borda);
  cursor: default;
  resize: none;
}

.botao {
  background: linear-gradient(135deg, var(--cor-primaria), var(--cor-primaria-hover));
  color: white;
  border: none;
  padding: 14px 24px;
  font-size: 16px;
  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: 50px;
}

.botao:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 0, 0, 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: 8px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: var(--transicao);
  margin-top: 8px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

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

/* Preview do vídeo */
.video-preview {
  background: #000;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--sombra);
  margin-top: 8px;
}

.video-preview iframe {
  width: 100%;
  height: 315px;
  border: none;
  display: block;
}

/* Container do código HTML */
.codigo-html {
  background: var(--cor-fundo);
  padding: 16px;
  border-radius: 12px;
  border: 1px solid var(--cor-borda);
  margin-top: 8px;
}

.codigo-html label {
  color: var(--cor-primaria);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.codigo-html label:before {
  content: "💻";
  font-size: 1.2em;
}

/* Animações */
@keyframes fadeIn {
  from { 
    opacity: 0; 
    transform: translateY(20px); 
  }
  to { 
    opacity: 1; 
    transform: translateY(0); 
  }
}

@keyframes slideIn {
  from {
    opacity: 0;