:root {
  /* Nova paleta de cores - tons terrosos e naturais */
  --color-kelp: #4c4933;
  --color-yellow-metal: #6e6537;
  --color-shadow: #88684b;
  --color-barley-corn: #9b8a5d;
  --color-pickled-bean: #6f3524;
  --color-hokey-pokey: #c4a22b;
  --color-roti: #c5aa54;
  --color-stack: #868c85;
  --color-coral-reef: #c6bca1;

  /* Mapeamento semântico com melhor contraste */
  --color-bg-primary: var(--color-kelp);
  --color-bg-secondary: var(--color-yellow-metal);
  --color-text-primary: #f0ebe0;
  --color-text-secondary: #b8b5b0;
  --color-accent: var(--color-hokey-pokey);
  --color-accent-hover: var(--color-roti);
  --color-border: var(--color-shadow);

  /* Tipografia humanista */
  --font-heading: 'Charter', 'Georgia', 'Iowan Old Style', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Escalas */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;

  --radius-sm: 4px;
  --radius-md: 8px;

  /* Transições suaves */
  --transition-base: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 18px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Utilidade de acessibilidade */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Header */
.header {
  background-color: var(--color-bg-primary);
  background-image: url('assets/images/image832.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  border-bottom: 2px solid var(--color-border);
  position: relative;
  min-height: 220px;
  display: flex;
  align-items: flex-end;
  padding-bottom: var(--space-lg);
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom, rgba(76, 73, 51, 0.2), rgba(76, 73, 51, 0.9));
  pointer-events: none;
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  width: 100%;
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: flex-end;
}

.search-input {
  background-color: rgba(110, 101, 55, 0.85);
  backdrop-filter: blur(10px);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  padding: var(--space-sm) var(--space-md);
  border-radius: 9999px;
  min-width: 320px;
  font-size: 0.95rem;
  font-family: inherit;
  transition: all var(--transition-base);
}

.search-input::placeholder {
  color: var(--color-text-secondary);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(196, 162, 43, 0.25);
  background-color: rgba(110, 101, 55, 0.95);
}

/* Main Content */
.main {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
}

.intro {
  margin-bottom: var(--space-xl);
  max-width: 700px;
}

.intro h2 {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 400;
  margin-bottom: var(--space-md);
  letter-spacing: -0.03em;
  color: var(--color-text-primary);
}

.intro p {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* Conceptual Index */
.conceptual-index {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.concept-pill {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  padding: 0.4rem 0.8rem;
  border-radius: 9999px;
  font-family: var(--font-body);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.concept-pill:hover {
  border-color: var(--color-accent);
  color: var(--color-text-primary);
  background-color: rgba(196, 162, 43, 0.1);
}

.concept-pill.active {
  background-color: var(--color-accent);
  color: var(--color-bg-primary);
  border-color: var(--color-accent);
  font-weight: 600;
}

.concept-pill .count {
  font-size: 0.75rem;
  opacity: 0.7;
}

.concept-pill.active .count {
  opacity: 0.9;
}

/* Project Grid */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-lg);
}

.project-card {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  height: 100%;
  text-decoration: none;
  color: inherit;
}

.project-card:hover,
.project-card:focus {
  transform: translateY(-3px);
  border-color: var(--color-accent);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.project-card:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.card-header {
  margin-bottom: var(--space-md);
}

.project-emoji {
  font-size: 2.8rem;
  line-height: 1;
  filter: grayscale(0.1);
}

.project-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: var(--space-sm);
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
}

.project-desc {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  flex-grow: 1;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.tag {
  font-size: 0.75rem;
  color: var(--color-accent);
  background-color: rgba(196, 162, 43, 0.15);
  padding: 0.25rem 0.7rem;
  border-radius: 9999px;
  font-weight: 500;
}

.no-results {
  text-align: center;
  padding: var(--space-xl) 0;
  color: var(--color-text-secondary);
  font-size: 1.05rem;
}

/* Footer */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-lg) 0;
  margin-top: var(--space-xl);
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

.footer-link {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-base);
  font-weight: 500;
}

.footer-link:hover,
.footer-link:focus {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

/* Viewer Page Styles */
.viewer-body {
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.viewer-header {
  background-color: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-border);
  height: 3.5rem;
  flex-shrink: 0;
}

.viewer-header-content {
  height: 100%;
  padding: 0 var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.viewer-left {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.back-button {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition-base);
}

.back-button:hover,
.back-button:focus {
  color: var(--color-accent);
}

.back-button:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.divider {
  width: 1px;
  height: 1.25rem;
  background-color: var(--color-border);
}

.viewer-left .project-title {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 450px;
  margin: 0;
}

.fullscreen-button {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all var(--transition-base);
  font-weight: 500;
}

.fullscreen-button:hover,
.fullscreen-button:focus {
  background-color: var(--color-border);
  color: var(--color-text-primary);
  border-color: var(--color-accent);
}

.fullscreen-button:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.iframe-container {
  flex-grow: 1;
  background-color: white;
  position: relative;
}

iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

/* Responsive */
@media (max-width: 768px) {
  html {
    font-size: 16px;
  }

  .header {
    min-height: 160px;
    padding-bottom: var(--space-md);
  }

  .header-content {
    padding: 0 var(--space-md);
  }

  .search-input {
    min-width: 100%;
    font-size: 0.9rem;
  }

  .main {
    padding: var(--space-lg) var(--space-md);
  }

  .project-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .intro h2 {
    font-size: 1.85rem;
  }

  .viewer-header-content {
    padding: 0 var(--space-sm);
  }

  .viewer-left .project-title {
    max-width: 180px;
  }
}

/* Print styles */
@media print {

  .header,
  .footer,
  .search-input,
  .conceptual-index {
    display: none;
  }

  .project-card {
    break-inside: avoid;
  }
}