:root {
  /* Base Monocromática Estrita para Campos Fixos e Estrutura (Estilo Terminal) */
  --bg-main: #000000;
  --bg-card: #0A0A0A;
  --bg-card-hover: #121212;
  --bg-input: #000000;
  --border-color: #222222;
  --border-focus: #777777;
  
  --text-main: #CCCCCC;
  --text-muted: #777777;
  --text-dim: #444444;

  /* 4 Cores Exclusivas para Campos Variáveis / Indicadores Dinâmicos */
  --color-accent-blue: #0088CC;    /* Cor 1: Foco, Seleção e Indicadores */
  --color-accent-green: #00AA00;   /* Cor 2: Confirmação, Quociente e Sucesso (Verde Terminal) */
  --color-accent-yellow: #CC8800;  /* Cor 3: Atenção e Votos Faltantes (Âmbar Terminal) */
  --color-accent-red: #CC0000;     /* Cor 4: Excesso de Votos e Exclusões */
  
  --primary: #EEEEEE;
  --primary-light: #FFFFFF;
  --accent-green: var(--color-accent-green);
  --accent-yellow: var(--color-accent-yellow);
  --accent-red: var(--color-accent-red);
  --accent-purple: var(--color-accent-blue);

  --radius-sm: 0px;
  --radius-md: 0px;
  --radius-lg: 0px;
  --radius-full: 0px;

  --font-sans: 'Consolas', 'Courier New', 'Courier', monospace;
  --shadow-sm: none;
  --shadow-md: none;
  --transition: none;

  /* Safe Area Insets para iPhone Dynamic Island, Notch e Android Gestures */
  --safe-top: env(safe-area-inset-top, 20px);
  --safe-bottom: env(safe-area-inset-bottom, 20px);
  --safe-left: env(safe-area-inset-left, 16px);
  --safe-right: env(safe-area-inset-right, 16px);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 16px; /* Letras grandes 16px para acessibilidade mobile */
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Layout Container com Safe Area para iPhone/Android */
.app-container {
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
  padding-top: calc(var(--safe-top) + 12px);
  padding-bottom: calc(var(--safe-bottom) + 85px);
  padding-left: calc(var(--safe-left) + 8px);
  padding-right: calc(var(--safe-right) + 8px);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* Header & Legal Alert */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-icon {
  width: 34px;
  height: 34px;
  background: var(--primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-title h1 {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.brand-title p {
  font-size: 0.75rem;
  color: var(--primary-light);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.legal-banner {
  background: rgba(30, 41, 59, 0.7);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-left: 4px solid var(--accent-yellow);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 0.8rem;
  color: #CBD5E1;
}

.legal-banner svg {
  flex-shrink: 0;
  color: var(--accent-yellow);
  margin-top: 2px;
}

/* Navigation Tabs (Mobile Bottom Bar / Top Desktop) */
.mobile-nav-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(15, 23, 42, 0.96);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-around;
  padding-top: 10px;
  padding-bottom: calc(var(--safe-bottom) + 8px);
  padding-left: var(--safe-left);
  padding-right: var(--safe-right);
  z-index: 1000;
}

.nav-tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

/* Botão Discreto de Engrenagem ADM */
.btn-adm-gear {
  background: transparent;
  border: none;
  color: #475569;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  opacity: 0.7;
}

.btn-adm-gear:hover, .btn-adm-gear:active {
  color: var(--primary-light);
  background: rgba(56, 189, 248, 0.1);
  opacity: 1;
}

/* Modal PIN de Acesso 6 Dígitos */
.pin-input-container {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin: 16px 0;
}

.pin-digit-input {
  width: 44px;
  height: 52px;
  text-align: center;
  font-size: 1.5rem;
  font-weight: 800;
  background: #0F172A;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: #FFFFFF;
}

.pin-digit-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.nav-tab-btn.active {
  color: var(--primary-light);
  background: rgba(56, 189, 248, 0.1);
}

.nav-tab-btn svg {
  width: 20px;
  height: 20px;
}

/* Content Views */
.tab-content {
  display: none;
  animation: fadeIn 0.25s ease-in-out;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Cards & Containers */
.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-sm);
}

.card-title-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.card-title-bar h2, .card-title-bar h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--bg-input);
  color: var(--primary);
  border: 1px solid var(--primary);
}

.btn-primary:hover {
  background: var(--primary);
  color: #000000;
}

.btn-secondary {
  background: #334155;
  color: var(--text-main);
  border-color: #475569;
}

.btn-secondary:hover {
  background: #475569;
}

.btn-outline {
  background: transparent;
  color: var(--primary-light);
  border-color: var(--primary-light);
}

.btn-outline:hover {
  background: rgba(56, 189, 248, 0.1);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  color: #FCA5A5;
  border-color: rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.3);
}

.btn-success {
  background: var(--bg-input);
  color: var(--accent-green);
  border: 1px solid var(--accent-green);
}

.btn-sm {
  padding: 4px 8px;
  font-size: 0.75rem;
}

.btn-lg {
  padding: 12px 20px;
  font-size: 1rem;
  width: 100%;
}

/* Inputs & Form Controls */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}

.form-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
}

.form-input {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  padding: 10px 12px;
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition);
  width: 100%;
}

.form-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
}

.badge-blue { background: rgba(56, 189, 248, 0.2); color: #7DD3FC; border: 1px solid rgba(56, 189, 248, 0.4); }
.badge-green { background: rgba(16, 185, 129, 0.2); color: #6EE7B7; border: 1px solid rgba(16, 185, 129, 0.4); }
.badge-yellow { background: rgba(245, 158, 11, 0.2); color: #FCD34D; border: 1px solid rgba(245, 158, 11, 0.4); }
.badge-red { background: rgba(239, 68, 68, 0.2); color: #FCA5A5; border: 1px solid rgba(239, 68, 68, 0.4); }
.badge-purple { background: rgba(139, 92, 246, 0.2); color: #C4B5FD; border: 1px solid rgba(139, 92, 246, 0.4); }

.simulation-grid {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* Responsive adjustments */
@media (min-width: 768px) {
  .app-container {
    padding-bottom: 30px;
    max-width: 1100px;
  }
  .mobile-nav-bar {
    position: relative;
    border-radius: var(--radius-md);
    margin-bottom: 12px;
  }
  .simulation-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    align-items: start;
  }
}