/* ==========================================================================
   PORTAL ACADÊMICO - PROF. DR. JOSÉ FLÁVIO BERTERO
   Estilo Editorial Premium, Formal e Visualmente Marcante
   ========================================================================== */

:root {
  /* Paleta Nobre Acadêmica & Dialética */
  --bg-dark: #0a0d14;
  --bg-card: rgba(18, 24, 38, 0.85);
  --bg-card-hover: rgba(28, 36, 56, 0.95);
  --bg-surface: #101624;
  --bg-surface-glass: rgba(16, 22, 36, 0.72);
  --bg-surface-light: #161e30;

  /* Vermelho Marxista Clássico & Vinho Granfino */
  --crimson-core: #991b1b;
  --crimson-hover: #b91c1c;
  --crimson-glow: rgba(185, 28, 28, 0.28);
  --crimson-subtle: rgba(153, 27, 27, 0.15);

  /* Ouro & Bronze Acadêmico */
  --gold-primary: #d4af37;
  --gold-bright: #f5d77f;
  --gold-dark: #aa8620;
  --gold-glow: rgba(212, 175, 55, 0.3);
  --gold-subtle: rgba(212, 175, 55, 0.12);

  /* Textos */
  --text-main: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-gold: #edd892;

  /* Bordas */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-gold: rgba(212, 175, 55, 0.35);
  --border-crimson: rgba(185, 28, 28, 0.35);

  /* Tipografia */
  --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-display: 'Cinzel', serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Efeitos e Transições */
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.65);
  --shadow-gold: 0 0 25px rgba(212, 175, 55, 0.2);
  --shadow-crimson: 0 0 25px rgba(185, 28, 28, 0.25);
  --transition-smooth: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 30px;
}

/* Reset Global */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-dark);
  scrollbar-width: thin;
  scrollbar-color: #aa8620 #0a0d14;
}

/* ==========================================================================
   Barra de Rolagem Personalizada (Scrollbar Vertical & Horizontal)
   Design Editorial Premium em Ouro Acadêmico e Vinho Clássico
   ========================================================================== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: #080b11;
  border-left: 1px solid rgba(212, 175, 55, 0.15);
  box-shadow: inset 0 0 8px rgba(0, 0, 0, 0.7);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #aa8620 0%, #d4af37 45%, #991b1b 100%);
  border-radius: 10px;
  border: 2px solid #080b11;
  background-clip: padding-box;
  box-shadow: inset 0 0 4px rgba(255, 255, 255, 0.25);
  transition: all 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #d4af37 0%, #f5d77f 40%, #b91c1c 100%);
  border: 1px solid rgba(212, 175, 55, 0.45);
  box-shadow: 0 0 10px rgba(212, 175, 55, 0.6), inset 0 0 6px rgba(255, 255, 255, 0.4);
}

::-webkit-scrollbar-thumb:active {
  background: linear-gradient(180deg, #f5d77f 0%, #d4af37 50%, #7f1d1d 100%);
}

::-webkit-scrollbar-corner {
  background: #080b11;
}

body {
  font-family: var(--font-sans);
  color: var(--text-main);
  background-color: #080b11;
  background-image: 
    linear-gradient(180deg, rgba(8, 11, 17, 0.42) 0%, rgba(8, 11, 17, 0.6) 25%, rgba(8, 11, 17, 0.75) 60%, rgba(8, 11, 17, 0.88) 100%),
    url('../imgs/fundo_topo.jpg');
  background-position: center top;
  background-repeat: no-repeat;
  background-size: cover;
  background-attachment: fixed;
  line-height: 1.7;
  overflow-x: hidden;
  position: relative;
}

/* Utilitários & Tipografia */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  color: #ffffff;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.text-gold { color: var(--gold-primary) !important; }
.text-crimson { color: #ef4444 !important; }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }

.font-display { font-family: var(--font-display); }

/* Containers */
.container {
  width: 100%;
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   Header & Navbar Flutuante Glassmorphism
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--transition-smooth);
  padding: 18px 0;
}

.site-header.scrolled {
  padding: 12px 0;
  background: rgba(10, 13, 20, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-gold);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: #ffffff;
}

.brand-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid var(--gold-primary);
  box-shadow: var(--shadow-gold);
  object-fit: cover;
  background: #1a2233;
}

.brand-info {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.2;
}

.brand-title {
  font-size: 0.72rem;
  font-family: var(--font-display);
  color: var(--gold-primary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 28px;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 8px 0;
  position: relative;
  transition: var(--transition-smooth);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--gold-primary), var(--crimson-core));
  transition: var(--transition-smooth);
}

.nav-link:hover,
.nav-link.active {
  color: #ffffff;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 20px;
  background: linear-gradient(135deg, var(--crimson-core) 0%, #680e0e 100%);
  color: #ffffff;
  border: 1px solid rgba(212, 175, 55, 0.4);
  border-radius: var(--radius-xl);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  box-shadow: 0 4px 15px rgba(153, 27, 27, 0.4);
  transition: var(--transition-smooth);
}

.btn-nav-cta:hover {
  background: linear-gradient(135deg, var(--crimson-hover) 0%, #7d1212 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(185, 28, 28, 0.6);
  border-color: var(--gold-bright);
}

.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: #ffffff;
  font-size: 1.6rem;
  cursor: pointer;
}

/* ==========================================================================
   Hero Section Majestosa
   ========================================================================== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 140px 0 80px 0;
  background: transparent;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 80% 30%, rgba(185, 28, 28, 0.15) 0%, transparent 60%);
  pointer-events: none;
}

.hero-unified-wrapper {
  max-width: 920px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.hero-content {
  background: rgba(10, 14, 23, 0.32);
  padding: 40px 48px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(212, 175, 55, 0.25);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.5);
  text-align: center;
}

.hero-author-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  margin-bottom: 24px;
  text-align: left;
}

.hero-mini-portrait {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
}

.mini-portrait-frame {
  width: 145px;
  height: 160px;
  border-radius: 75px 75px 20px 20px;
  background: rgba(10, 14, 23, 0.25);
  border: 2px solid var(--border-gold);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.7), var(--shadow-gold);
  padding: 6px;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  transition: transform 0.4s ease;
}

.mini-portrait-frame:hover {
  transform: translateY(-4px) scale(1.02);
  border-color: var(--gold-bright);
}

.mini-portrait-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  border-radius: 70px 70px 14px 14px;
  filter: contrast(1.05) brightness(1.02);
}

.mini-portrait-badge {
  margin-top: -12px;
  background: rgba(10, 13, 20, 0.95);
  border: 1px solid var(--gold-primary);
  border-radius: var(--radius-xl);
  padding: 4px 14px;
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--gold-bright);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.7);
  z-index: 3;
  white-space: nowrap;
}

.hero-header-text {
  flex-grow: 1;
}

.hero-badge-wrapper {
  margin-bottom: 14px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 16px;
  background: rgba(10, 14, 23, 0.4);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-xl);
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--gold-bright);
  text-transform: uppercase;
  backdrop-filter: blur(6px);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8);
}

.hero-title {
  font-size: 2.85rem;
  line-height: 1.15;
  margin-bottom: 14px;
  color: #ffffff;
  text-shadow: 0 3px 12px rgba(0, 0, 0, 0.95), 0 0 20px rgba(0, 0, 0, 0.6);
}

.hero-subhead {
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--gold-bright);
  font-family: var(--font-serif);
  font-style: italic;
  margin-bottom: 0;
  line-height: 1.4;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.9);
}

.hero-description {
  font-size: 1.05rem;
  color: #f8fafc;
  margin: 0 auto 32px auto;
  max-width: 780px;
  line-height: 1.8;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.95);
  text-align: center;
}

.hero-academic-creds {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 18px 24px;
  background: rgba(10, 14, 23, 0.35);
  border-left: 3px solid var(--gold-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 0 auto 36px auto;
  max-width: 780px;
  backdrop-filter: blur(5px);
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.9);
  text-align: left;
}

.cred-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: #f1f5f9;
}

.cred-icon {
  color: var(--gold-bright);
  font-size: 1.1rem;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  justify-content: center;
}

.btn-primary-gold {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  background: linear-gradient(135deg, var(--gold-primary) 0%, var(--gold-dark) 100%);
  color: #0d1117;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  border-radius: var(--radius-xl);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5), 0 0 20px rgba(212, 175, 55, 0.35);
  transition: var(--transition-smooth);
}

.btn-primary-gold:hover {
  background: linear-gradient(135deg, var(--gold-bright) 0%, var(--gold-primary) 100%);
  transform: translateY(-3px);
  box-shadow: 0 15px 35px rgba(212, 175, 55, 0.5);
  color: #000;
}

.btn-outline-white {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: rgba(10, 14, 23, 0.35);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(8px);
  text-shadow: 0 2px 5px rgba(0, 0, 0, 0.8);
  transition: var(--transition-smooth);
}

.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: #ffffff;
  transform: translateY(-3px);
}

/* Retrato do Professor */
.hero-portrait-card {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.portrait-glow {
  position: absolute;
  width: 440px;
  height: 440px;
  background: radial-gradient(circle, rgba(212, 175, 55, 0.15) 0%, rgba(153, 27, 27, 0.1) 50%, transparent 70%);
  filter: blur(40px);
  z-index: 1;
  pointer-events: none;
  animation: pulseGlow 6s ease-in-out infinite alternate;
}

@keyframes pulseGlow {
  0% { transform: scale(0.95); opacity: 0.7; }
  100% { transform: scale(1.08); opacity: 1; }
}

.portrait-frame {
  position: relative;
  z-index: 2;
  width: 380px;
  height: 470px;
  border-radius: 200px 200px 30px 30px;
  background: rgba(10, 14, 23, 0.22);
  border: 2px solid var(--border-gold);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), var(--shadow-gold);
  padding: 12px;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}

.portrait-frame::before {
  content: '';
  position: absolute;
  inset: 6px;
  border-radius: 194px 194px 24px 24px;
  border: 1px dashed rgba(212, 175, 55, 0.35);
  pointer-events: none;
}

.portrait-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  border-radius: 190px 190px 20px 20px;
  transition: transform 0.6s ease;
  filter: contrast(1.05) brightness(1.02);
}

.hero-portrait-card:hover .portrait-img {
  transform: scale(1.03);
}

.portrait-signature {
  position: absolute;
  bottom: -22px;
  background: rgba(10, 13, 20, 0.92);
  border: 1px solid var(--gold-primary);
  border-radius: var(--radius-xl);
  padding: 10px 24px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7);
  z-index: 3;
}

.signature-title {
  font-family: var(--font-display);
  font-size: 0.82rem;
  letter-spacing: 0.15em;
  color: var(--gold-bright);
}

/* ==========================================================================
   Seções Gerais & Títulos
   ========================================================================== */
.section {
  padding: 110px 0;
  position: relative;
}

.section-alt {
  /* background-color: rgba(10, 14, 23, 0.45); */
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section-header {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 60px auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--gold-primary);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.section-title {
  font-size: 2.6rem;
  line-height: 1.25;
  margin-bottom: 18px;
}

.section-divider {
  width: 80px;
  height: 3px;
  background: linear-gradient(90deg, var(--gold-primary), var(--crimson-core));
  margin: 0 auto 20px auto;
  border-radius: 2px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ==========================================================================
   Estatísticas Rápidas de Impacto
   ========================================================================== */
.stats-banner {
  margin-top: -50px;
  position: relative;
  z-index: 10;
  margin-bottom: 80px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  background: rgba(16, 22, 36, 0.85);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  box-shadow: var(--shadow-lg), var(--shadow-gold);
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 10px;
  border-right: 1px solid var(--border-subtle);
}

.stat-item:last-child {
  border-right: none;
}

.stat-icon {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: rgba(212, 175, 55, 0.12);
  border: 1px solid var(--border-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--gold-primary);
  flex-shrink: 0;
}

.stat-number {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.1;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

/* ==========================================================================
   Seção Teórica Especial: Karl Marx & Friedrich Engels
   ========================================================================== */
.marx-section {
  position: relative;
  /*background: 
    radial-gradient(circle at 15% 50%, rgba(153, 27, 27, 0.12) 0%, transparent 50%),
    radial-gradient(circle at 85% 50%, rgba(212, 175, 55, 0.08) 0%, transparent 50%),
    rgba(10, 14, 23, 0.42); */
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-top: 1px solid var(--border-crimson);
  border-bottom: 1px solid var(--border-crimson);
  overflow: hidden;
}

.marx-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.marx-quote-card {
  position: relative;
  background: linear-gradient(145deg, rgba(22, 29, 46, 0.9), rgba(16, 22, 36, 0.95));
  border: 1px solid var(--border-crimson);
  border-left: 4px solid var(--crimson-core);
  border-radius: var(--radius-md);
  padding: 44px;
  box-shadow: var(--shadow-md), var(--shadow-crimson);
}

.quote-mark {
  font-family: var(--font-serif);
  font-size: 5rem;
  line-height: 1;
  color: var(--crimson-core);
  opacity: 0.5;
  position: absolute;
  top: 10px;
  left: 20px;
  pointer-events: none;
}

.marx-quote-text {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-style: italic;
  color: #ffffff;
  line-height: 1.8;
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}

.marx-quote-author {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-subtle);
  padding-top: 18px;
}

.author-names {
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--gold-bright);
  letter-spacing: 0.1em;
}

.author-work {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.marx-pillars {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.pillar-card {
  display: flex;
  gap: 20px;
  background: rgba(16, 22, 36, 0.7);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition-smooth);
}

.pillar-card:hover {
  border-color: var(--border-gold);
  transform: translateX(8px);
  background: rgba(22, 30, 48, 0.9);
}

.pillar-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--crimson-subtle);
  border: 1px solid var(--border-crimson);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #f87171;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.pillar-content h4 {
  font-size: 1.15rem;
  margin-bottom: 8px;
  color: #ffffff;
}

.pillar-content p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   Seção de Apresentação / Memorial Intelectual
   ========================================================================== */
.apresentacao-card {
  background: linear-gradient(180deg, rgba(20, 27, 43, 0.9) 0%, rgba(13, 17, 26, 0.95) 100%);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-lg);
  padding: 56px 64px;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.apresentacao-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 160px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--gold-primary), transparent);
}

.editorial-text {
  font-family: Georgia, 'Bitstream Charter', 'URW Bookman L', serif;
  font-size: 1.15rem;
  line-height: 1.95;
  color: #e2e8f0;
  text-align: justify;
}

.editorial-text p {
  margin-bottom: 24px;
  text-indent: 2em;
}

.editorial-text p:first-of-type::first-letter {
  font-family: var(--font-display);
  font-size: 4rem;
  line-height: 0.85;
  float: left;
  margin-right: 14px;
  margin-top: 6px;
  color: var(--gold-bright);
  text-shadow: 0 0 15px rgba(212, 175, 55, 0.4);
}

.editorial-highlight {
  background: rgba(212, 175, 55, 0.08);
  border-left: 3px solid var(--gold-primary);
  padding: 20px 28px;
  margin: 32px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  font-size: 1.1rem;
  color: var(--text-gold);
}

/* ==========================================================================
   Acervo de Escritos & Textos (Com Filtros e Busca Instantânea)
   ========================================================================== */
.acervo-controls {
  margin-bottom: 40px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.search-box-wrapper {
  position: relative;
  max-width: 650px;
  margin: 0 auto;
  width: 100%;
}

.search-input {
  width: 100%;
  padding: 16px 24px 16px 54px;
  background: rgba(16, 22, 36, 0.9);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-xl);
  color: #ffffff;
  font-size: 1rem;
  font-family: var(--font-sans);
  outline: none;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-smooth);
}

.search-input:focus {
  border-color: var(--gold-bright);
  box-shadow: 0 0 20px rgba(212, 175, 55, 0.35);
  background: rgba(22, 30, 48, 0.95);
}

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

.search-icon {
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gold-primary);
  font-size: 1.25rem;
}

.clear-search-btn {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.1rem;
  display: none;
  padding: 6px;
}

.clear-search-btn:hover {
  color: #ffffff;
}

/* Categorias / Filtros Pills */
.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.filter-btn {
  background: rgba(18, 24, 38, 0.7);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 10px 22px;
  border-radius: var(--radius-xl);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-smooth);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.filter-btn:hover {
  background: rgba(28, 36, 56, 0.9);
  color: #ffffff;
  border-color: rgba(212, 175, 55, 0.3);
}

.filter-btn.active {
  background: linear-gradient(135deg, var(--crimson-core) 0%, #680e0e 100%);
  border-color: var(--gold-primary);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(153, 27, 27, 0.4);
}

.filter-count {
  font-size: 0.75rem;
  background: rgba(255, 255, 255, 0.12);
  padding: 2px 7px;
  border-radius: 10px;
}

/* Grid de Artigos */
.acervo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 28px;
  margin-bottom: 50px;
}

.acervo-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition-smooth);
  backdrop-filter: blur(12px);
  overflow: hidden;
}

.acervo-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--crimson-core), var(--gold-primary));
  opacity: 0.6;
  transition: var(--transition-smooth);
}

.acervo-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  border-color: var(--border-gold);
  box-shadow: var(--shadow-md), var(--shadow-gold);
}

.acervo-card:hover::before {
  opacity: 1;
  height: 4px;
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.card-category-badge {
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: var(--radius-xl);
  background: rgba(212, 175, 55, 0.1);
  color: var(--gold-bright);
  border: 1px solid rgba(212, 175, 55, 0.25);
}

.card-type-badge {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.card-title {
  font-size: 1.25rem;
  line-height: 1.4;
  margin-bottom: 14px;
  color: #ffffff;
  transition: var(--transition-smooth);
}

.acervo-card:hover .card-title {
  color: var(--gold-bright);
}

.card-excerpt {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 24px;
}

.tag-item {
  font-size: 0.72rem;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  padding: 3px 8px;
  border-radius: 4px;
}

.card-actions {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
  border-top: 1px solid var(--border-subtle);
  padding-top: 18px;
}

.btn-read-doc {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  background: rgba(212, 175, 55, 0.12);
  color: var(--gold-bright);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.btn-read-doc:hover {
  background: var(--gold-primary);
  color: #0b0e14;
}

.btn-download-pdf {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: var(--crimson-subtle);
  color: #f87171;
  border: 1px solid var(--border-crimson);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  text-decoration: none;
  transition: var(--transition-smooth);
}

.btn-download-pdf:hover {
  background: var(--crimson-core);
  color: #ffffff;
  transform: translateY(-2px);
}

/* Feedback de Busca Vazia */
.no-results-msg {
  display: none;
  text-align: center;
  padding: 60px 20px;
  grid-column: 1 / -1;
  color: var(--text-muted);
}

.no-results-icon {
  font-size: 3rem;
  color: var(--crimson-core);
  margin-bottom: 16px;
}

/* ==========================================================================
   Seção de Vídeos & Conferências
   ========================================================================== */
.videos-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}

.video-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

.video-card:hover {
  border-color: var(--border-gold);
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg), var(--shadow-gold);
}

.video-embed-wrapper {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
  height: 0;
  overflow: hidden;
  background: #000000;
}

.video-embed-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.video-card-body {
  padding: 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  flex-grow: 1;
}

.video-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-display);
  font-size: 0.72rem;
  color: #ef4444;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.video-card-title {
  font-size: 1.35rem;
  line-height: 1.3;
  margin-bottom: 12px;
  color: #ffffff;
}

.video-card-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}

.video-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-subtle);
  padding-top: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Seção de Contato Acadêmico
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 50px;
  align-items: flex-start;
}

.contact-info-card {
  background: linear-gradient(145deg, rgba(22, 29, 46, 0.9), rgba(16, 22, 36, 0.95));
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-lg);
  padding: 44px;
  box-shadow: var(--shadow-md);
}

.contact-info-title {
  font-size: 1.8rem;
  margin-bottom: 16px;
  color: #ffffff;
}

.contact-info-desc {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
}

.contact-details-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-bottom: 36px;
}

.contact-detail-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.detail-icon-box {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(212, 175, 55, 0.12);
  border: 1px solid var(--border-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold-primary);
  font-size: 1.3rem;
  flex-shrink: 0;
  box-shadow: 0 4px 15px rgba(212, 175, 55, 0.15);
}

.detail-text h5 {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gold-bright);
  margin-bottom: 4px;
}

.detail-text p {
  color: #ffffff;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.detail-subtext {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: block;
}

.email-direct-link {
  color: #ffffff;
  text-decoration: none;
  border-bottom: 1px dashed var(--gold-primary);
  transition: var(--transition-smooth);
}

.email-direct-link:hover {
  color: var(--gold-bright);
  border-bottom-style: solid;
}

.info-card-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.academic-seal {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 2px solid var(--gold-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: radial-gradient(circle, rgba(212, 175, 55, 0.2) 0%, rgba(153, 27, 27, 0.15) 100%);
  box-shadow: 0 0 20px rgba(212, 175, 55, 0.25);
  flex-shrink: 0;
}

.seal-letters {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--gold-bright);
  letter-spacing: 0.12em;
}

.seal-ring {
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  border: 1px dashed rgba(212, 175, 55, 0.5);
}

.info-card-badge {
  font-family: var(--font-display);
  font-size: 0.72rem;
  color: var(--gold-bright);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 4px;
}

.highlight-quote-icon {
  font-size: 1.4rem;
  color: var(--gold-primary);
  display: block;
  margin-bottom: 10px;
  opacity: 0.7;
}

/* ==========================================================================
   Card do Formulário Nobre & Inputs com Ícones
   ========================================================================== */
.contact-form-card {
  background: linear-gradient(160deg, rgba(22, 29, 45, 0.95) 0%, rgba(13, 17, 27, 0.98) 100%);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-lg);
  padding: 44px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.75), var(--shadow-gold);
  backdrop-filter: blur(20px);
  position: relative;
  overflow: hidden;
}

.contact-form-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--gold-primary), var(--crimson-core), var(--gold-primary));
}

.form-card-topbar {
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.form-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold-bright);
  margin-bottom: 8px;
}

.form-title {
  font-size: 1.6rem;
  color: #ffffff;
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}

.form-subtitle {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.form-row-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  margin-bottom: 22px;
}

.form-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.88rem;
  font-weight: 600;
  color: #e2e8f0;
  margin-bottom: 8px;
}

.form-label span.req {
  color: #ef4444;
  margin-left: 2px;
}

.form-label span.opt {
  color: var(--text-muted);
  font-weight: 400;
  font-size: 0.8rem;
}

.label-with-counter {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.char-counter {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  background: rgba(255, 255, 255, 0.05);
  padding: 2px 8px;
  border-radius: 4px;
}

/* Wrapper dos Inputs com Ícones */
.input-icon-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-field-icon {
  position: absolute;
  left: 18px;
  color: var(--gold-primary);
  font-size: 1rem;
  pointer-events: none;
  transition: var(--transition-smooth);
  opacity: 0.85;
}

.textarea-wrapper {
  align-items: flex-start;
}

.textarea-icon {
  top: 18px;
}

.form-control {
  width: 100%;
  background: rgba(10, 14, 23, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-sm);
  color: #ffffff;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: var(--transition-smooth);
  outline: none;
}

.form-control.with-icon {
  padding: 14px 18px 14px 48px;
}

.form-control:hover {
  border-color: rgba(212, 175, 55, 0.4);
  background: rgba(13, 18, 30, 0.95);
}

.form-control:focus {
  border-color: var(--gold-bright);
  background: rgba(16, 23, 38, 1);
  box-shadow: 0 0 20px rgba(212, 175, 55, 0.25), inset 0 0 10px rgba(212, 175, 55, 0.05);
}

.input-icon-wrapper:focus-within .input-field-icon {
  color: var(--gold-bright);
  transform: scale(1.15);
  opacity: 1;
  text-shadow: 0 0 10px rgba(212, 175, 55, 0.6);
}

.form-control::placeholder {
  color: #64748b;
  font-size: 0.9rem;
}

textarea.form-control {
  resize: vertical;
  min-height: 140px;
  line-height: 1.6;
}

/* Botão de Envio com Shimmer */
.btn-submit-contact {
  width: 100%;
  position: relative;
  overflow: hidden;
  padding: 16px 28px;
  background: linear-gradient(135deg, var(--crimson-core) 0%, #750d0d 100%);
  color: #ffffff;
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  transition: var(--transition-smooth);
  box-shadow: 0 10px 25px rgba(153, 27, 27, 0.45);
}

.btn-submit-contact:hover {
  background: linear-gradient(135deg, var(--crimson-hover) 0%, #8b1212 100%);
  border-color: var(--gold-bright);
  transform: translateY(-2px);
  box-shadow: 0 15px 35px rgba(185, 28, 28, 0.6), var(--shadow-gold);
}

.btn-submit-contact:active {
  transform: translateY(0);
}

.btn-shimmer {
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transform: skewX(-25deg);
  transition: 0.75s ease;
}

.btn-submit-contact:hover .btn-shimmer {
  left: 140%;
}

.btn-submit-contact:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
}

.form-privacy-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 16px;
  text-align: center;
  line-height: 1.4;
}

.form-status-alert {
  display: none;
  padding: 18px 22px;
  border-radius: var(--radius-sm);
  margin-top: 22px;
  font-size: 0.95rem;
  line-height: 1.5;
  box-shadow: var(--shadow-md);
  animation: fadeInAlert 0.4s ease;
}

@keyframes fadeInAlert {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.form-status-alert.success {
  display: block;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.5);
  color: #a7f3d0;
}

.form-status-alert.error {
  display: block;
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.5);
  color: #fecaca;
}

/* ==========================================================================
   Modal de Leitura Editorial de Documentos
   ========================================================================== */
.doc-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 7, 12, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 30px;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-smooth);
}

.doc-modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.doc-modal-container {
  width: 100%;
  max-width: 1000px;
  height: 90vh;
  background: #111622;
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-lg);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.9), var(--shadow-gold);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: scale(0.95);
  transition: var(--transition-smooth);
}

.doc-modal-overlay.active .doc-modal-container {
  transform: scale(1);
}

.doc-modal-header {
  padding: 20px 28px;
  background: #0d121c;
  border-bottom: 1px solid var(--border-gold);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.modal-doc-info {
  display: flex;
  flex-direction: column;
}

.modal-doc-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: #ffffff;
  line-height: 1.3;
}

.modal-doc-author {
  font-size: 0.8rem;
  color: var(--gold-primary);
  font-family: var(--font-display);
  letter-spacing: 0.1em;
}

.modal-header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.modal-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-subtle);
  color: #ffffff;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  transition: var(--transition-smooth);
}

.modal-btn:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: #ffffff;
}

.modal-btn.btn-gold {
  background: var(--gold-primary);
  color: #000000;
  font-weight: 600;
  border-color: var(--gold-primary);
}

.modal-btn.btn-gold:hover {
  background: var(--gold-bright);
}

.modal-btn.btn-close {
  width: 36px;
  height: 36px;
  padding: 0;
  justify-content: center;
  border-radius: 50%;
}

.doc-modal-body {
  flex-grow: 1;
  overflow-y: auto;
  padding: 44px 56px;
  background: #fdfdfd;
  color: #1a1a1a;
  font-family: Georgia, 'Bitstream Charter', serif;
  font-size: 1.15rem;
  line-height: 1.9;
}

/* Modo escuro dentro do modal para quem preferir */
.doc-modal-body.dark-mode {
  background: #0f1420;
  color: #cbd5e1;
}

.doc-modal-body.dark-mode p,
.doc-modal-body.dark-mode font,
.doc-modal-body.dark-mode span {
  color: #e2e8f0 !important;
}

.doc-modal-body.dark-mode div#titulo {
  background: #182236 !important;
}

.doc-modal-body.dark-mode h1,
.doc-modal-body.dark-mode h2,
.doc-modal-body.dark-mode h3 {
  color: #ffffff !important;
}

.doc-modal-loader {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  gap: 16px;
  color: #64748b;
}

.spinner {
  width: 44px;
  height: 44px;
  border: 3px solid rgba(212, 175, 55, 0.2);
  border-top-color: var(--gold-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ==========================================================================
   Footer Formal & Créditos
   ========================================================================== */
.site-footer {
  background: rgba(7, 9, 14, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-gold);
  padding: 80px 0 30px 0;
  position: relative;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 60px;
}

.footer-brand h3 {
  font-size: 1.6rem;
  margin-bottom: 8px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-column h4 {
  font-family: var(--font-display);
  font-size: 0.92rem;
  color: var(--gold-bright);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 22px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.92rem;
  transition: var(--transition-smooth);
}

.footer-links a:hover {
  color: var(--gold-primary);
  padding-left: 6px;
}

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.back-to-top-btn {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold-primary), var(--gold-dark));
  color: #0b0e14;
  border: 1px solid #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  cursor: pointer;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.6), var(--shadow-gold);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-smooth);
}

.back-to-top-btn.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top-btn:hover {
  background: var(--gold-bright);
  transform: translateY(-4px);
}

/* ==========================================================================
   Responsividade & Mobile Friendly
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 50px;
  }

  .hero-badge-wrapper, .hero-buttons, .hero-academic-creds {
    justify-content: center;
  }

  .hero-academic-creds {
    border-left: none;
    border-top: 3px solid var(--gold-primary);
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  }

  .hero-description {
    margin: 0 auto 32px auto;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .marx-grid {
    grid-template-columns: 1fr;
  }

  .videos-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .hero-content {
    padding: 24px 18px;
  }

  .hero-author-header {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 18px;
  }

  .section-title {
    font-size: 2rem;
  }

  .apresentacao-card {
    padding: 30px 24px;
  }

  .doc-modal-body {
    padding: 24px 20px;
  }

  .menu-toggle {
    display: block;
  }

  .nav-menu {
    position: fixed;
    top: 75px;
    left: 0;
    right: 0;
    background: #0c101a;
    flex-direction: column;
    padding: 30px 20px;
    border-bottom: 1px solid var(--border-gold);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
    display: none;
  }

  .nav-menu.open {
    display: flex;
  }

  .nav-actions {
    display: none;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .stat-item {
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
    padding-bottom: 16px;
  }

  .stat-item:last-child {
    border-bottom: none;
  }

  .acervo-grid {
    grid-template-columns: 1fr;
  }

  .form-row-2col {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .contact-form-card {
    padding: 30px 20px;
  }
}