:root {
  /* Fundo Preto Profissional & Superfícies Dark Titanium */
  --bg-canvas: #0b0d0f;
  --bg-elevated: #121518;
  --bg-panel: #161a1e;
  --bg-panel-hover: #1d2228;
  --bg-header: rgba(11, 13, 15, 0.9);

  /* Prata Metálico & Textos de Alto Contraste */
  --silver-100: #f4f6f8;
  --silver-200: #dce1e7;
  --silver-300: #a8b0b9;
  --silver-400: #7c8590;
  --silver-gradient: linear-gradient(135deg, #eaedf1 0%, #aeb6c0 50%, #d4dae1 100%);
  --silver-gradient-hover: linear-gradient(135deg, #ffffff 0%, #c2c9d2 50%, #e4e8ed 100%);

  /* Bordas */
  --border-subtle: #23282e;
  --border-strong: #384049;

  /* Tipografia Moderna Estilo Calculadora */
  --font-display: 'Orbitron', 'Chakra Petch', sans-serif;
  --font-calc: 'Chakra Petch', monospace, sans-serif;

  /* Métricas */
  --container-max: 1160px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --transition: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-canvas);
  color: var(--silver-100);
  font-family: var(--font-calc);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-canvas);
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(180, 188, 198, 0.08) 0%, transparent 55%),
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 100% 100%, 40px 40px, 40px 40px;
  min-height: 100vh;
}

/* Acessibilidade */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--silver-gradient);
  color: #0b0d0f;
  padding: 0.75rem 1rem;
  font-family: var(--font-calc);
  font-weight: 700;
  z-index: 1000;
  text-decoration: none;
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  top: 1rem;
}

:focus-visible {
  outline: 2px solid var(--silver-100);
  outline-offset: 3px;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Cabeçalho Preto Fosco */
.site-header {
  background: var(--bg-header);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.brand-plate {
  display: inline-block;
  text-decoration: none;
  border-radius: 6px;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.7);
  transition: transform var(--transition);
}

.brand-plate:hover {
  transform: translateY(-1px);
}

.brand-svg {
  display: block;
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 1.75rem;
}

.main-nav a {
  color: var(--silver-300);
  text-decoration: none;
  font-family: var(--font-calc);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  transition: color var(--transition);
}

.main-nav a:hover {
  color: var(--silver-100);
}

/* Hero Section */
.hero-section {
  padding: 4.25rem 0 3.25rem;
  text-align: center;
  border-bottom: 1px solid var(--border-subtle);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-calc);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 1.2px;
  color: var(--silver-200);
  background: var(--bg-panel);
  border: 1px solid var(--border-strong);
  padding: 0.45rem 1rem;
  border-radius: 999px;
  margin-bottom: 1.5rem;
}

.pulse-indicator {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--silver-100);
  box-shadow: 0 0 8px var(--silver-100);
}

h1 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.5px;
  max-width: 860px;
  margin: 0 auto 1.25rem;
  background: linear-gradient(180deg, #ffffff 0%, #9fa8b3 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  max-width: 660px;
  margin: 0 auto;
  color: var(--silver-300);
  font-size: 1.1rem;
  font-weight: 400;
}

/* Seção dos 3 Portais */
.portals-section {
  padding: 3.75rem 0;
}

.section-label {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-align: center;
  color: var(--silver-400);
  margin-bottom: 2.5rem;
}

.portals-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

.terminal-card {
  background: linear-gradient(180deg, var(--bg-panel) 0%, #101316 100%);
  border: 1px solid var(--border-subtle);
  border-top: 2px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}

.terminal-card:hover {
  transform: translateY(-4px);
  border-color: var(--silver-300);
  background: linear-gradient(180deg, var(--bg-panel-hover) 0%, #13161a 100%);
}

.terminal-card--root {
  border-top: 2px solid var(--silver-200);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.65), inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

.module-id {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--silver-400);
}

.module-badge {
  font-family: var(--font-calc);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 1px;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  background: #1f242a;
  color: var(--silver-200);
  border: 1px solid var(--border-strong);
}

.module-badge--silver {
  background: var(--silver-gradient);
  color: #0b0d0f;
  border: none;
}

.terminal-card h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--silver-100);
  margin-bottom: 0.75rem;
}

.terminal-card p {
  color: var(--silver-300);
  font-size: 0.96rem;
  margin-bottom: 1.75rem;
}

.spec-list {
  list-style: none;
  border-top: 1px solid var(--border-subtle);
  padding-top: 1.25rem;
  margin-bottom: 2rem;
}

.spec-list li {
  font-size: 0.92rem;
  color: var(--silver-200);
  margin-bottom: 0.6rem;
  padding-left: 1.25rem;
  position: relative;
}

.spec-list li::before {
  content: ">";
  position: absolute;
  left: 0;
  font-weight: 700;
  color: var(--silver-400);
}

/* Botões Estilo Tecla de Calculadora */
.btn-hardware {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.95rem 1.25rem;
  font-family: var(--font-calc);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--silver-100);
  background: #1e2329;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
}

.btn-hardware:hover {
  background: #282f37;
  border-color: var(--silver-200);
}

.btn-hardware--silver {
  background: var(--silver-gradient);
  color: #0b0d0f;
  border: 1px solid #ffffff;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.45);
}

.btn-hardware--silver:hover {
  background: var(--silver-gradient-hover);
}

/* Especificações Inferiores */
.specs-section {
  padding: 3.25rem 0 4.25rem;
  border-top: 1px solid var(--border-subtle);
}

.specs-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

.spec-panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2rem;
}

.panel-tag {
  display: block;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--silver-400);
  margin-bottom: 0.5rem;
}

.spec-panel h2 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--silver-100);
  margin-bottom: 0.75rem;
}

.spec-panel p {
  color: var(--silver-300);
  font-size: 0.96rem;
}

/* Rodapé Preto */
.site-footer {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border-subtle);
  padding: 1.75rem 0;
  font-size: 0.9rem;
  color: var(--silver-400);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  text-align: center;
}

.system-telemetry {
  font-family: var(--font-calc);
  font-size: 0.85rem;
  color: var(--silver-300);
}

/* Modal */
.hardware-modal {
  margin: auto;
  padding: 0;
  width: 92%;
  max-width: 440px;
  background: var(--bg-panel);
  color: var(--silver-100);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.85);
}

.hardware-modal::backdrop {
  background: rgba(5, 7, 9, 0.82);
  backdrop-filter: blur(6px);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 1.25rem 1.5rem;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border-subtle);
}

.modal-kicker {
  display: block;
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 1.5px;
  color: var(--silver-400);
  margin-bottom: 0.25rem;
}

.modal-header h2 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--silver-100);
}

.btn-close {
  background: none;
  border: none;
  color: var(--silver-300);
  font-size: 1.75rem;
  line-height: 1;
  cursor: pointer;
}

.modal-form {
  padding: 1.5rem;
}

.modal-desc {
  font-size: 0.94rem;
  color: var(--silver-300);
  margin-bottom: 1.5rem;
}

.field-group {
  margin-bottom: 1.25rem;
}

.field-group label {
  display: block;
  font-family: var(--font-calc);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--silver-200);
  margin-bottom: 0.45rem;
}

.field-group input {