/* ==== Tokens ==== */
:root {
  --color-brand-primary: #8e2de2; /* Deep Purple */
  --color-brand-secondary: #4a00e0; /* Darker Purple */
  --color-bg-dark: #121212; /* Fundo escuro */
  --color-bg-light: #1e1e1e; /* Superfície mais clara para cards/seções */
  --color-text-light: #e0e0e0; /* Texto claro */
  --color-text-dimmed: #9e9e9e; /* Texto secundário, suave */
  --color-border: #333333; /* Bordas sutis */
  --color-success: #4CAF50; /* Verde para sucesso */
  --color-error: #F44336; /* Vermelho para erro */

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  --shadow-elev-low: 0 4px 8px rgba(0, 0, 0, 0.2);
  --shadow-elev-mid: 0 8px 16px rgba(0, 0, 0, 0.3);
  --shadow-elev-high: 0 12px 24px rgba(0, 0, 0, 0.4);

  --transition-fast: 0.2s ease-in-out;
  --transition-medium: 0.3s ease-out;

  --spacing-1: 0.5rem;   /* 8px */
  --spacing-2: 1rem;     /* 16px */
  --spacing-3: 1.5rem;   /* 24px */
  --spacing-4: 2rem;     /* 32px */
  --spacing-5: 2.5rem;   /* 40px */
  --spacing-6: 3rem;     /* 48px */
  --spacing-7: 4rem;     /* 64px */

  --max-width-content: 800px;
  --max-width-hero: 1200px;

  --font-heading: 'Poppins', -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-monospace: 'Fira Code', 'Cascadia Code', monospace;
}

/* Importar fontes do Google Fonts - NUNCA faça isso em produção com CDN externo */
/* Para fins de teste, manteremos local */
@font-face {
  font-family: 'Poppins';
  src: url('fonts/Poppins-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
}
@font-face {
  font-family: 'Poppins';
  src: url('fonts/Poppins-SemiBold.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
}
@font-face {
  font-family: 'Poppins';
  src: url('fonts/Poppins-Bold.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
}
@font-face {
  font-family: 'Inter';
  src: url('fonts/Inter-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
}
@font-face {
  font-family: 'Inter';
  src: url('fonts/Inter-Medium.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
}

/* ==== Reset & Base ==== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  font-size: 100%; /* 16px base */
  scroll-behavior: smooth;
}
body {
  background: var(--color-bg-dark);
  color: var(--color-text-light);
  font-family: var(--font-body);
  line-height: 1.6;
  padding: 0; /* Remover padding do body */
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
}

/* ==== Hero Section ==== */
.hero {
  width: 100%;
  min-height: 70vh;
  /* Gradiente de fundo adicionado */
  background: linear-gradient(135deg, var(--color-brand-primary) 0%, var(--color-brand-secondary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-6) var(--spacing-2);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-elev-high);
}

/* Overlay de gradiente sutil para dar profundidade */
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at top left, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
              radial-gradient(circle at bottom right, rgba(0, 0, 0, 0.1) 0%, transparent 50%);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--max-width-hero);
  padding: var(--spacing-4);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(3rem, 8vw, 5.5rem); /* Título responsivo */
  font-weight: 700;
  color: #fff;
  line-height: 1.1;
  margin-bottom: var(--spacing-3);
  letter-spacing: -0.05em;
  text-shadow: var(--shadow-elev-mid);
  display: flex; /* Para alinhar o ícone e o texto */
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2); /* Espaçamento entre o ícone e o texto */
}

/* Estilo para o ícone de luz brilhando */
.light-icon {
  width: clamp(2.5rem, 6vw, 4.5rem); /* Tamanho responsivo para o ícone */
  height: clamp(2.5rem, 6vw, 4.5rem);
  fill: #FFD700; /* Cor dourada para o brilho */
  filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.7)); /* Brilho sutil */
  animation: pulseLight 2s infinite alternate; /* Animação de pulsação */
}

@keyframes pulseLight {
  from {
    transform: scale(1);
    opacity: 0.9;
  }
  to {
    transform: scale(1.05);
    opacity: 1;
    filter: drop-shadow(0 0 12px rgba(255, 215, 0, 0.9));
  }
}


.hero-subtitle {
  font-family: var(--font-body);
  font-size: clamp(1.1rem, 2.5vw, 1.6rem);
  color: rgba(255, 255, 255, 0.9);
  max-width: 700px;
  margin: 0 auto var(--spacing-5);
  line-height: 1.5;
}

.hero-cta-btn {
  font-size: 1.2rem;
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius-lg);
  min-width: 200px;
  background: #fff; /* Botão branco para contraste */
  color: var(--color-brand-primary);
  box-shadow: var(--shadow-elev-low);
  font-weight: 600;
  transition: transform var(--transition-medium), box-shadow var(--transition-medium), background var(--transition-medium);
}
.hero-cta-btn:hover,
.hero-cta-btn:focus-visible {
  transform: translateY(-5px) scale(1.02);
  box-shadow: var(--shadow-elev-mid);
  background: var(--color-text-light); /* Pequeno ajuste no hover para feedback */
  color: var(--color-brand-secondary);
}
.hero-cta-btn:active {
  transform: translateY(-2px);
  box-shadow: var(--shadow-elev-low);
}

/* ==== Layout ==== */
.app-main {
  width: 100%;
  max-width: var(--max-width-content);
  padding: var(--spacing-4) var(--spacing-2);
  margin-top: var(--spacing-5); /* Espaço entre o hero e o conteúdo principal */
  flex-grow: 1; /* Garante que o main ocupe espaço disponível */
}

/* ==== Sections ==== */
.section {
  background: var(--color-bg-light);
  border-radius: var(--radius-md);
  padding: var(--spacing-4);
  box-shadow: var(--shadow-elev-low);
  margin-bottom: var(--spacing-4);
  transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}
.section.hidden {
  display: none;
}
.section:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-elev-mid);
}


/* ==== Toolbar ==== */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-3);
  align-items: center;
}
.toolbar > *:last-child {
  margin-left: auto; /* Alinhar o último item (filtro) à direita se houver espaço */
}

/* ==== Buttons ==== */
.btn-primary,
.btn-secondary {
  cursor: pointer;
  border: none;
  border-radius: var(--radius-sm);
  padding: var(--spacing-1) var(--spacing-3);
  font-size: 1rem;
  font-weight: 500;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-1);
  text-decoration: none; /* Para usar em links, se necessário */
}
.btn-primary {
  background: linear-gradient(45deg, var(--color-brand-primary), var(--color-brand-secondary));
  color: #fff;
  box-shadow: var(--shadow-elev-low);
}
.btn-primary:hover,
.btn-primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow-elev-mid);
  opacity: 0.95;
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-elev-low);
}
.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}
.btn-secondary {
  background: var(--color-border);
  color: var(--color-text-light);
  box-shadow: var(--shadow-elev-low);
}
.btn-secondary:hover,
.btn-secondary:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow-elev-mid);
  background: #444; /* Levemente mais claro no hover */
}
.btn-secondary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-elev-low);
}

/* ==== Inputs ==== */
.input-text,
.input-search,
.input-select {
  flex-grow: 1; /* Permite que inputs ocupem espaço */
  min-width: 180px; /* Garante que não fiquem muito pequenos */
  padding: var(--spacing-1);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: var(--font-body);
  color: var(--color-text-light);
  background: var(--color-bg-dark);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.input-text::placeholder,
.input-search::placeholder {
  color: var(--color-text-dimmed);
  opacity: 0.7;
}
.input-text:focus,
.input-search:focus,
.input-select:focus {
  outline: none;
  border-color: var(--color-brand-primary);
  box-shadow: 0 0 0 3px rgba(142, 45, 226, 0.3);
}

.input-select {
  appearance: none; /* Remove estilo nativo do select */
  background: var(--color-bg-dark) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%239e9e9e'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E") no-repeat right 0.75rem center;
  background-size: 1em;
  padding-right: 2.5rem;
  cursor: pointer;
}

/* ==== Cards ==== */
.cards {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}
.card {
  background: var(--color-bg-dark);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-3);
  box-shadow: var(--shadow-elev-low);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}
.card:hover,
.card:focus-within {
  transform: translateY(-3px);
  box-shadow: var(--shadow-elev-mid);
}
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-2);
}
.card-title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-text-light);
  flex-grow: 1;
}
.card-category {
  font-size: 0.9rem;
  color: var(--color-text-dimmed);
  background: var(--color-border);
  padding: 0.25rem var(--spacing-1);
  border-radius: var(--radius-sm);
  white-space: nowrap;
}
.card-actions {
  display: flex;
  gap: var(--spacing-1);
  margin-top: var(--spacing-1); /* Espaço entre o texto e os botões */
}
.action-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-dimmed);
  padding: var(--spacing-1);
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  display: flex; /* Para centralizar SVG */
  align-items: center;
  justify-content: center;
}
.action-btn:hover,
.action-btn:focus-visible {
  background: rgba(var(--color-brand-primary), 0.1);
  color: var(--color-brand-primary);
  outline: none;
}
.action-btn svg {
  fill: currentColor; /* Usa a cor do texto do botão */
  width: 20px;
  height: 20px;
}

/* ==== Form ==== */
.knowledge-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}
.form-title {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-1);
  text-align: center;
}
.form-actions {
  display: flex;
  gap: var(--spacing-2);
  justify-content: flex-end;
  margin-top: var(--spacing-2);
}

/* ==== Toast ==== */
.toast {
  position: fixed;
  bottom: var(--spacing-4);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-success); /* Padrão sucesso */
  color: #fff;
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-elev-mid);
  opacity: 0;
  visibility: hidden; /* Oculta completamente quando não visível */
  transition: opacity var(--transition-medium) ease-out, visibility var(--transition-medium) ease-out;
  z-index: 1000;
  min-width: 200px;
  text-align: center;
  font-weight: 500;
}
.toast.show {
  opacity: 1;
  visibility: visible;
}
.toast.error {
  background: var(--color-error);
}

/* ==== Acessibilidade ==== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ==== Responsividade ==== */
@media (max-width: 768px) {
  .hero {
    min-height: 50vh;
    padding: var(--spacing-4) var(--spacing-2);
  }
  .hero-title {
    font-size: clamp(2.5rem, 10vw, 4rem);
  }
  .light-icon {
    width: clamp(2rem, 8vw, 3.5rem);
    height: clamp(2rem, 8vw, 3.5rem);
  }
  .hero-subtitle {
    font-size: clamp(1rem, 3vw, 1.2rem);
  }
  .hero-cta-btn {
    font-size: 1rem;
    padding: var(--spacing-1) var(--spacing-3);
    min-width: 160px;
  }
  .app-main {
    padding: var(--spacing-3) var(--spacing-2);
    margin-top: var(--spacing-4);
  }
  .section {
    padding: var(--spacing-3);
  }
  .form-title {
    font-size: 1.5rem;
  }
  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  .toolbar > *:last-child {
    margin-left: 0; /* Desabilita o alinhamento à direita em telas pequenas */
  }
  .input-text, .input-search, .input-select {
    width: 100%;
    min-width: unset;
  }
  .card-header {
    flex-direction: column;
    align-items: flex-start;
  }
  .card-category {
    margin-top: var(--spacing-1);
  }
  .card-actions {
    margin-left: auto; /* Move actions para a direita do card-header */
    margin-top: 0;
  }
}

@media (max-width: 480px) {
  body {
    padding: 0; /* Garantir que não haja padding extra */
  }
  .app-main {
    padding: var(--spacing-2);
  }
  .section {
    padding: var(--spacing-2);
  }
  .hero {
    min-height: 60vh;
  }
  .hero-title {
    font-size: clamp(2rem, 12vw, 3.5rem);
  }
  .light-icon {
    width: clamp(1.8rem, 10vw, 3rem);
    height: clamp(1.8rem, 10vw, 3rem);
  }
  .hero-subtitle {
    font-size: 0.9rem;
    margin-bottom: var(--spacing-3);
  }
  .hero-cta-btn {
    font-size: 0.9rem;
    padding: 0.75rem var(--spacing-2);
    min-width: 140px;
  }
  .form-title {
    font-size: 1.3rem;
  }
  .form-actions {
    flex-direction: column;
  }
  .btn-primary, .btn-secondary {
    width: 100%;
  }
}