/* --- ESTILOS GERAIS --- */
:root {
  --color-primary: #502378;
  --color-primary-dark: #2e0b45;
  --color-text-muted: #666666;
  --font-title: 'Montserrat', sans-serif;
  --font-body: 'Merriweather', serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { background-color: #fbf9fd; color: #333; font-family: var(--font-body); line-height: 1.8; overflow-x: hidden; }
a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
ul { list-style: none; padding: 0; margin: 0; }

/* Keyboard focus visibility for accessibility */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[role="button"]:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid #5b3e77;
  outline-offset: 2px;
  border-radius: 4px;
}

/* Header */
.top-bar {
  position: fixed; top: 0; width: 100%; padding: 1rem 2rem; display: flex; justify-content: space-between; align-items: center; z-index: 1000;
  background: rgba(255, 255, 255, 0.95); border-bottom: 1px solid rgba(0,0,0,0.05);
}
.brand { font-family: var(--font-title); font-weight: 800; font-size: 1.2rem; letter-spacing: 1px; color: var(--color-primary); }
.language-selector a { font-family: var(--font-title); font-size: 0.85rem; margin-left: 15px; color: var(--color-text-muted); font-weight: 600; }
.language-selector a.active { color: var(--color-primary); text-decoration: underline; }

/* Hero Section (Topo Limpo) */
.hero {
  min-height: 100vh; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; padding: 8rem 2rem 4rem;
  background: linear-gradient(180deg, #f3eafa 0%, #ffffff 100%); position: relative;
}

.hero-content { z-index: 1; max-width: 1000px; width: 100%; }

.hero h1 {
  font-family: var(--font-title); font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 800; margin-bottom: 1rem; color: var(--color-primary-dark); line-height: 1.1;
}
.hero p.subtitle { font-size: 1.3rem; color: var(--color-text-muted); margin-bottom: 3rem; font-style: italic; font-weight: 300; }

/* Imagem Central */
.hero-image-container {
    margin: 2rem auto 3rem; max-width: 900px; width: 100%; border-radius: 20px; overflow: hidden;
    box-shadow: 0 10px 40px rgba(80, 35, 120, 0.08); transition: transform 0.5s ease;
}
.hero-image-container:hover { transform: translateY(-5px); box-shadow: 0 15px 50px rgba(80, 35, 120, 0.15); }
.hero-image { width: 100%; height: auto; display: block; }
.image-caption { background: #fff; padding: 1rem; font-size: 0.85rem; color: var(--color-text-muted); border-top: 1px solid #eee; }

/* Botão Principal */
.btn-primary {
    display: inline-block; padding: 1rem 3rem; background-color: var(--color-primary); color: #fff; border-radius: 50px;
    font-family: var(--font-title); font-weight: 600; text-transform: uppercase; letter-spacing: 1px; font-size: 0.9rem;
    box-shadow: 0 4px 15px rgba(80, 35, 120, 0.3); transition: all 0.3s ease; margin-top: 2rem;
}
.btn-primary:hover { background-color: var(--color-primary-dark); transform: translateY(-3px); box-shadow: 0 8px 25px rgba(80, 35, 120, 0.4); }

/* Seta Scroll */
.scroll-indicator { margin-top: 4rem; font-size: 2rem; color: #7a3dad; opacity: 0.5; animation: bounce 2s infinite; cursor: pointer; }
@keyframes bounce { 0%, 20%, 50%, 80%, 100% {transform: translateY(0);} 40% {transform: translateY(-10px);} 60% {transform: translateY(-5px);} }

/* Grelha de Campos */
.campos-section { padding: 6rem 2rem; background-color: #f3eff6; }
.container { max-width: 1200px; margin: 0 auto; }
.grid-header { text-align: center; margin-bottom: 4rem; }
.grid-header h2 { color: var(--color-primary-dark); font-family: var(--font-title); font-size: 2rem; }

.campos-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 2rem; }

.campo-card {
  background: #fff; border-radius: 16px; overflow: hidden; transition: all 0.4s ease; display: flex; flex-direction: column;
  box-shadow: 0 5px 15px rgba(0,0,0,0.03); border: 1px solid rgba(0,0,0,0.03); text-decoration: none;
}
.campo-card:hover { transform: translateY(-10px); box-shadow: 0 15px 50px rgba(80, 35, 120, 0.1); }

.card-icon-area { height: 120px; display: flex; align-items: center; justify-content: center; font-size: 2.5rem; }
.bg-cosmos { background: #eef2ff; color: #4338ca; }
.bg-bio { background: #ecfdf5; color: #059669; }
.bg-tech { background: #fff1f2; color: #be123c; }
.bg-future { background: #fffbeb; color: #b45309; }
.bg-dark { background: #2e0b45; color: #fff; }

.card-content { padding: 2rem; flex-grow: 1; }
.card-title { font-family: var(--font-title); font-weight: 700; font-size: 1.2rem; margin-bottom: 0.8rem; color: var(--color-primary-dark); }
.card-link { padding: 1.5rem 2rem; background: #fafafa; font-size: 0.9rem; font-weight: 700; color: var(--color-primary); text-transform: uppercase; border-top: 1px solid #eee; display: flex; justify-content: space-between; align-items: center; }
.campo-card:hover .card-link { background: var(--color-primary); color: #fff; }

/* --- EXPLORE THE WORK --- */
.structures-section {
  padding: 5.5rem 2rem;
  background: #fff;
  border-top: 1px solid #e2e8f0;
}

.structures-shell {
  max-width: 1280px;
}

.structures-header {
  max-width: 880px;
  margin: 0 auto 2.5rem;
  text-align: center;
}

.structures-header h2 {
  font-family: var(--font-title);
  color: var(--color-primary-dark);
  font-size: clamp(1.9rem, 3vw, 2.5rem);
  line-height: 1.2;
  margin-bottom: 0.9rem;
}

.structures-subtitle {
  font-size: 1rem;
  line-height: 1.75;
  color: #5a5562;
}

.primary-nav-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1.5rem, 2vw, 2rem);
  margin-bottom: 2rem;
}

.primary-nav-block {
  border: 1px solid #ece8f1;
  border-radius: 14px;
  padding: 1.5rem 1.35rem 1.3rem;
  background: #fdfcfe;
}

.primary-nav-block h3 {
  font-family: var(--font-title);
  color: #2f2244;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.11em;
  margin-bottom: 0.7rem;
  font-weight: 700;
}

.primary-nav-desc {
  color: #5f5a67;
  font-size: 0.94rem;
  line-height: 1.65;
  margin-bottom: 1rem;
}

.primary-nav-links li + li {
  margin-top: 0.42rem;
}

.primary-nav-links a {
  font-size: 0.93rem;
  color: #3f3a48;
  display: block;
  line-height: 1.6;
  padding: 0.15rem 0;
}

.primary-nav-links a:hover,
.primary-nav-links a:focus {
  color: var(--color-primary);
}

.publications-access {
  border-top: 1px solid #ece8f1;
  margin-top: 0.3rem;
  padding-top: 1.2rem;
  display: flex;
  justify-content: center;
}

.publications-access-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.62rem 1.15rem;
  border-radius: 999px;
  border: 1px solid rgba(80, 35, 120, 0.28);
  background: #fbf9fd;
  font-family: var(--font-title);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #5b3e77;
  text-align: center;
}

.publications-access-link:hover,
.publications-access-link:focus {
  border-color: #5b3e77;
  color: #ffffff;
  background: #5b3e77;
}

@media (max-width: 1100px) {
  .primary-nav-grid {
    gap: 1.15rem;
  }

  .primary-nav-block {
    padding: 1.25rem 1rem 1.1rem;
  }

  .primary-nav-desc,
  .primary-nav-links a {
    font-size: 0.9rem;
  }
}

@media (max-width: 760px) {
  .structures-section {
    padding: 4.3rem 1.2rem;
  }

  .structures-header {
    text-align: left;
    margin-bottom: 1.7rem;
  }

  .structures-subtitle {
    font-size: 0.95rem;
  }

  .primary-nav-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
  }

  .publications-access {
    justify-content: stretch;
  }

  .publications-access-link {
    width: 100%;
    border-radius: 10px;
    text-align: left;
    justify-content: flex-start;
  }
}

/* Footer */
.footer { background: #f9f9f9; padding: 4rem 2rem 2rem; border-top: 1px solid #eee; text-align: center; color: #666; font-size: 0.9rem; }
.author-img { width: 80px; height: 80px; border-radius: 50%; margin-bottom: 1rem; object-fit: cover; }
.social-links a { color: var(--color-primary); margin: 0 10px; font-size: 1.2rem; }

/* Animações */
.fade-in-up { animation: fadeInUp 1s ease-out forwards; opacity: 0; transform: translateY(30px); }
@keyframes fadeInUp { to { opacity: 1; transform: translateY(0); } }