/* ========================================= */
/*  CONFIGURAÇÕES GLOBAIS E VARIÁVEIS DE TEMA */
/* ========================================= */

:root {
  /* TEMA ESCURO (PADRÃO) */
  --primary-color: #00d4ff;
  --secondary-color: #0099cc;
  --accent-color: #ff6b35;
  --background-dark: #0a0a0a;
  --background-card: #1a1a1a;
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --border-color: #333;
  --header-bg: rgba(10, 10, 10, 0.7); /* Mais transparente */
  
  /* Gradientes */
  --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
  --gradient-accent: linear-gradient(135deg, #ff6b35 0%, #ff8c42 100%);
  --gradient-dark: linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 100%);
  
  /* Sombras */
  --shadow-neon: 0 0 20px rgba(0, 212, 255, 0.3);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-button: 0 4px 15px rgba(0, 212, 255, 0.2);
  
  /* Transições */
  --transition-fast: 0.2s ease;
  --transition-smooth: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* VARIÁVEIS PARA O TEMA CLARO */
body.light-theme {
  --primary-color: #007BFF;
  --secondary-color: #0056b3;
  --accent-color: #dc3545;
  --background-dark: #f4f7f9;
  --background-card: #ffffff;
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --border-color: #dee2e6;
  --header-bg: rgba(255, 255, 255, 0.7); /* Mais transparente */

  --gradient-primary: linear-gradient(135deg, #007BFF 0%, #0056b3 100%);
  --gradient-dark: linear-gradient(135deg, #ffffff 0%, #f1f1f1 100%);

  --shadow-neon: 0 0 15px rgba(0, 123, 255, 0.2);
  --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.1);
  --shadow-button: 0 4px 15px rgba(0, 123, 255, 0.2);
}

/* Reset e configurações globais */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Orbitron', monospace;
  background: var(--background-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ========================================= */
/*  HEADER E SELETOR DE TEMA                 */
/* ========================================= */

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--header-bg); /* Usando a variável de fundo mais transparente */
  backdrop-filter: blur(10px);
  /* border-bottom: 1px solid var(--border-color); */ /* Removido a borda inferior */
  z-index: 1000;
  transition: background-color var(--transition-smooth), border-color var(--transition-smooth);
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.7rem 20px; /* Reduzido de 1rem para 0.7rem */
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: var(--shadow-neon);
  cursor: pointer;
  transition: var(--transition-smooth);
}

.header .logo {
  width: 100%;
  max-width: 60px; /* Reduzido de 80px para 60px */
  height: auto;
}

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

/* Estilos para o Seletor de Tema */
.theme-switcher {
  margin-left: auto; /* Pushes it to the right */
  transition: opacity var(--transition-smooth), transform var(--transition-smooth);
}

.theme-toggle-btn {
  background: var(--background-card);
  border: 1px solid var(--border-color);
  border-radius: 30px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-around; /* Ajustado para espaçar os ícones */
  padding: 5px;
  position: relative;
  width: 60px; /* Aumentado para melhor visual */
  height: 30px; /* Aumentado para melhor visual */
  transition: background-color var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
  box-shadow: 0 0 10px rgba(0, 212, 255, 0.1); /* Sombra neon sutil */
}

body.light-theme .theme-toggle-btn {
  box-shadow: 0 0 10px rgba(0, 123, 255, 0.1);
}

.theme-toggle-btn:hover {
  box-shadow: 0 0 15px rgba(0, 212, 255, 0.3);
}

body.light-theme .theme-toggle-btn:hover {
  box-shadow: 0 0 15px rgba(0, 123, 255, 0.3);
}

.theme-toggle-btn .icon-sun,
.theme-toggle-btn .icon-moon {
  font-size: 1.1rem; /* Aumentado o tamanho dos ícones */
  position: absolute; /* Posicionamento absoluto para sobrepor */
  transition: opacity 0.3s ease, transform 0.3s ease;
  line-height: 1;
}

.theme-toggle-btn .icon-sun {
  left: 8px; /* Posição inicial do sol */
}

.theme-toggle-btn .icon-moon {
  right: 8px; /* Posição inicial da lua */
}

body.light-theme .theme-toggle-btn .icon-sun { opacity: 1; transform: translateX(0); }
body:not(.light-theme) .theme-toggle-btn .icon-sun { opacity: 0; transform: translateX(-10px); }

body.light-theme .theme-toggle-btn .icon-moon { opacity: 0; transform: translateX(10px); }
body:not(.light-theme) .theme-toggle-btn .icon-moon { opacity: 1; transform: translateX(0); }


.theme-toggle-btn::after {
  content: '';
  position: absolute;
  top: 3px; /* Ajustado para centralizar melhor */
  left: 4px; /* Ajustado para centralizar melhor */
  width: 22px; /* Aumentado */
  height: 22px; /* Aumentado */
  background-color: var(--secondary-color);
  border-radius: 50%;
  transition: transform 0.3s ease, background-color var(--transition-smooth);
}

body.light-theme .theme-toggle-btn::after {
  transform: translateX(26px); /* Ajustado para o novo tamanho do botão */
  background-color: var(--primary-color); /* Cor do toggle no tema claro */
}

/* ========================================= */
/*  ANIMAÇÃO DE FUNDO (PARTICLES.JS)         */
/* ========================================= */

#particles-js {
  position: fixed; /* Fica fixo na tela, mesmo com scroll */
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: -1; /* <<< IMPORTANTE: Coloca o fundo atrás de todo o conteúdo */
}

/* ========================================= */
/*  CONTEÚDO PRINCIPAL E FORMULÁRIOS         */
/* ========================================= */

.main {
  margin-top: 70px; /* Ajustado para compensar o header menor */
  min-height: 100vh;
}

.section {
  padding: 4rem 0;
  min-height: calc(100vh - 70px); /* Ajustado para considerar o header menor */
  display: flex;
  align-items: center;
  transition: background-color var(--transition-smooth);
}

.home-section {
  min-height: calc(100vh - 70px); /* Garante que a home section ocupe a tela */
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.section:nth-child(even) {
  background: var(--gradient-dark);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 1.5rem; /* Ajustado para o subtítulo */
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 3px;
  background: var(--gradient-primary);
  border-radius: 2px;
  box-shadow: var(--shadow-neon);
}

.subtitle {
  font-size: 1.3rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
}

/* Grid de Cards de Função para a Landing Page */
.function-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  width: 100%;
  max-width: 900px;
  margin-top: 2rem;
}

.function-card {
  background: var(--gradient-dark);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), background-color var(--transition-smooth), border-color var(--transition-smooth);
  position: relative;
  overflow: hidden;
  text-decoration: none; /* Remover sublinhado do link */
  color: inherit; /* Herdar cor do texto */
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.function-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
}

.function-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 12px 40px rgba(0, 212, 255, 0.2);
}

body.light-theme .function-card:hover {
  box-shadow: 0 12px 40px rgba(0, 123, 255, 0.2);
}

.function-card .card-title {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 10px rgba(0, 212, 255, 0.3);
}

body.light-theme .function-card .card-title {
  text-shadow: none;
}

.function-card .card-description {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  flex-grow: 1; /* Permite que a descrição ocupe espaço */
}

.function-card .card-icon {
  font-size: 3rem;
  line-height: 1;
  margin-top: auto; /* Empurra o ícone para baixo */
}


/* Cards (para as páginas de função) */
.card {
  background: var(--gradient-dark);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), background-color var(--transition-smooth), border-color var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0, 212, 255, 0.2);
}

body.light-theme .card:hover {
  box-shadow: 0 12px 40px rgba(0, 123, 255, 0.2);
}

/* Inputs e Labels */
.input-container,
.output-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  gap: 1rem;
}

.label-neon {
  font-weight: 500;
  color: var(--primary-color);
  text-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
  flex: 1;
}

body.light-theme .label-neon {
  text-shadow: none;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-secondary);
}

input[type="number"],
select,
textarea {
  width: 100%;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition-smooth);
  margin-bottom: 1rem;
}

body.light-theme input[type="number"],
body.light-theme select,
body.light-theme textarea {
  background: rgba(0, 0, 0, 0.05);
}

input[type="number"]:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(0, 212, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
}

body.light-theme input[type="number"]:focus,
body.light-theme select:focus,
body.light-theme textarea:focus {
  box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.2);
  background: rgba(0, 0, 0, 0.08);
}

textarea {
  min-height: 120px;
  resize: vertical;
}

select {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image: url('data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http://www.w3.org/2000/svg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%2300D4FF%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.4-5.4-12.8z%22/%3E%3C/svg%3E' );
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 0.8em;
  padding-right: 2.5rem;
}

body.light-theme select {
  background-image: url('data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http://www.w3.org/2000/svg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23007BFF%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.4-5.4-12.8z%22/%3E%3C/svg%3E' );
}

select option {
  background: var(--background-card);
  color: var(--text-primary);
  padding: 10px;
}

/* Botões */
.btn {
  padding: 0.8rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  position: relative;
  overflow: hidden;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(255, 255, 255, 0.1);
}

.neon-btn {
  background: var(--gradient-primary);
  color: var(--text-primary);
  font-weight: 600;
  box-shadow: var(--shadow-button);
}
.neon-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: var(--transition-slow);
}
.neon-btn:hover::before {
  left: 100%;
}
.neon-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 212, 255, 0.4);
}
body.light-theme .neon-btn:hover {
  box-shadow: 0 8px 25px rgba(0, 123, 255, 0.4);
}

.center-btn {
  display: flex;
  justify-content: center;
  margin: 2rem 0;
}

/* Resultados */
.resultado-un {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--primary-color);
  text-align: center;
  padding: 1rem;
  background: rgba(0, 212, 255, 0.1);
  border-radius: 8px;
  border: 1px solid rgba(0, 212, 255, 0.3);
  margin-top: 1rem;
}
body.light-theme .resultado-un {
  background: rgba(0, 123, 255, 0.1);
  border: 1px solid rgba(0, 123, 255, 0.3);
}

#resultado-al {
  padding: 1rem;
  background: rgba(255, 107, 53, 0.1);
  border: 1px solid rgba(255, 107, 53, 0.3);
  border-radius: 8px;
  color: var(--accent-color);
  text-align: center;
  font-weight: 500;
  margin-top: 1rem;
}
body.light-theme #resultado-al {
  background: rgba(220, 53, 69, 0.1);
  border: 1px solid rgba(220, 53, 69, 0.3);
}

/* ========================================= */
/*  RESPONSIVIDADE                           */
/* ========================================= */

@media (max-width: 768px) {
  /* Adjust header container for mobile to ensure logo and theme switcher are well-placed */
  .header .container {
    justify-content: space-between;
    padding: 0.7rem 15px; /* Ajustado para mobile também */
  }
  .theme-switcher {
    margin-left: auto;
    margin-right: 0; /* Remove any extra margin */
  }
  
  .section-title { font-size: 2rem; }
  .input-container, .output-container { flex-direction: column; align-items: stretch; gap: 0.5rem; }
  .container { padding: 0 15px; }
  .card { padding: 1.5rem; }

  .function-cards-grid {
    grid-template-columns: 1fr; /* Uma coluna em telas menores */
  }
}

@media (max-width: 480px) {
  .section-title { font-size: 1.8rem; }
  .logo { font-size: 1.5rem; }
  .section { padding: 2rem 0; }
  .function-card .card-title { font-size: 1.5rem; }
  .function-card .card-description { font-size: 0.9rem; }
  .function-card .card-icon { font-size: 2.5rem; }
}

/* Animações Gerais */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
/* Removido .card para aplicar a .function-card */
.function-card {
  animation: fadeInUp 0.6s ease-out;
}

/* Scrollbar personalizada */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--background-dark);
}
::-webkit-scrollbar-thumb {
  background: var(--gradient-primary);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--secondary-color);
}

.hidden {
  display: none;
}