/* Reset e variáveis */
:root {
  --primary-color: #222;
  --accent-color: #ffcc33;
  --text-color: #333;
  --light-text: #fff;
  --nav-height: 60px;
  --z-index-nav: 1000;
}

/* Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  padding-top: var(--nav-height);
}

/* Header & Navigation */
header {
  background: var(--primary-color);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: var(--z-index-nav);
  display: flex;
  align-items: center;
  padding: 0 1rem;
}

.site-title {
  color: var(--light-text);
  margin-right: auto;
}

.site-title h1 {
  font-size: 1.25rem;
  font-weight: 600;
}

/* Menu de Navegação */
nav {
  display: flex;
  align-items: center;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 1rem;
  margin: 0;
  padding: 0;
}

nav a {
  color: var(--light-text);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  transition: background-color 0.3s;
  font-size: 0.9rem;
  white-space: nowrap;
}

nav a:hover,
nav a.active {
  background-color: var(--accent-color);
  color: var(--primary-color);
}

/* Menu Mobile */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--light-text);
  cursor: pointer;
  padding: 0.5rem;
}

/* Mobile Layout */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
    position: relative;
    z-index: calc(var(--z-index-nav) + 1);
  }

  nav {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--primary-color);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }

  nav.active {
    transform: translateX(0);
  }

  nav ul {
    flex-direction: column;
    padding: 1rem;
    width: 100%;
  }

  nav a {
    display: block;
    padding: 1rem;
    width: 100%;
    text-align: left;
  }
}

/* Conteúdo Principal */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

/* Loading Spinner */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 200px;
}

.spinner {
  border: 4px solid rgba(0, 0, 0, 0.1);
  border-left-color: var(--accent-color);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Seções de Conteúdo */
.section-content {
  margin-bottom: 3rem;
}

/* Footer */
footer {
  background: var(--primary-color);
  color: var(--light-text);
  padding: 2rem 1rem;
  margin-top: 3rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

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

/* Touch Device Optimizations */
@media (hover: none) {
  nav a {
    padding: 1rem;
  }
  
  .nav-toggle {
    padding: 1rem;
    margin: -1rem;
  }
}
/* Link de salto para o conteúdo (acessibilidade por teclado) */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 0.75rem 1.25rem;
  background: var(--accent-color);
  color: var(--primary-color);
  font-weight: 700;
  text-decoration: none;
}
.skip-link:focus {
  left: 0;
}

/* Entrada suave das seções. O estado inicial fica sob .js-anim, aplicada
   por js/main.js só depois que o conteúdo entrou — assim uma falha de JS
   nunca deixa o guia invisível. */
.js-anim .section-content {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.js-anim .section-content.visible {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .js-anim .section-content,
  .js-anim .section-content.visible {
    opacity: 1;
    transform: none;
    transition: none;
  }
}