:root {
  --bg: #ffffff;
  --text: #222222;
  --border: #cccccc;
  --highlight: #05a300;
  --title: #000000;
  --error: #d32f2f;
  --success: #388e3c;
  --muted: #555555;
  --light: #f8f8f8;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  margin: 0;
  padding: 20px;
}

h1, h2 {
  color: var(--title);
  margin-bottom: 10px;
}

.container {
  max-width: 1000px;
  margin: auto;
  margin-top: 10%;
}

.card {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: white;
  padding: 16px;
  margin-bottom: 20px;
}

label {
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
}

input, select, button {
  padding: 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
  font-size: 14px;
  /* width: 100%; */
}

button {
  cursor: pointer;
  transition: 0.2s;
}

button:hover {
  background: var(--highlight);
  color: white;
  border-color: var(--highlight);
}

.primary { background: var(--highlight); color: white; border: none; }
.secondary { background: var(--light); color: var(--text); border: 1px solid var(--border); }
.ghost { background: transparent; border: 1px solid var(--border); }

.row {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  justify-content: center;  
  align-items: center;     
  gap: 10px;                
  margin-top: 10px;
}



.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 10px;
}

/* Grades de memória */
.memory-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(70px, 1fr));
  gap: 8px;
}

.cell {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  text-align: center;
  font-size: 14px;
  background: var(--light);
  transition: 0.3s;
}

.cell.fill { background: #e3f2fd; }      /* Azul claro: quadro ocupado */
.cell.hit { background: #c8e6c9; }       /* Verde: hit */
.cell.fault { background: #ffcdd2; }     /* Vermelho: falta de página */

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th, .table td {
  border: 1px solid var(--border);
  padding: 6px 8px;
  font-size: 14px;
  text-align: center;
}

.table th {
  background: var(--light);
  color: var(--muted);
}

.log {
  background: var(--light);
  border: 1px solid var(--border);
  padding: 10px;
  height: 150px;
  overflow-y: auto;
  font-family: monospace;
  font-size: 13px;
}

footer {
  font-size: 13px;
  color: var(--muted);
  text-align: center;
  margin-top: 20px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

/* Footer específico do site (estilos leves para não quebrar o layout) */
.site-footer{
  background: #0f1724; /* fundo escuro próximo ao da imagem */
  color: #9fb7c9;      /* texto em tom acinzentado-azulado */
  padding: 2.5rem 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  border-top: none; /* sobrescreve a borda clara global */
  box-sizing: border-box;
  /* Compensa o padding do body para ter efeito full-bleed */
  width: calc(100% + 40px);
  margin-left: -20px;
}
.site-footer-links{ display:flex; gap:1.5rem; flex-wrap:wrap; align-items:center; justify-content:center; font-size:0.95rem; }
.site-footer-link{ transition: color .2s ease; color:#8fd1ff; text-decoration:none; }
.site-footer-link:hover{ color: #ffffff; }
.site-footer-brand img{ max-width:140px; width:100%; height:auto; display:block; filter:brightness(1.1); }

/* Imagem fixa grande no topo (overlay) */
.hero-logo-overlay{
  position: absolute;
  top: 0; /* fixar exatamente no topo da janela */
  left:50%;
  transform:translateX(-50%);
  z-index:1200;
  pointer-events:none; /* não atrapalha cliques */
  display:flex;
  align-items:center;
  justify-content:center;
  width:100%;
}
.hero-logo-overlay img{
  width:400px; /* maior por padrão conforme pedido */
  max-width:90vw;
  height:auto;
  display:block;
  filter: drop-shadow(0 8px 26px rgba(146, 146, 146, 0.5));
  opacity:0.99;
}

@media (max-width: 1000px){
  .hero-logo-overlay img{ width:280px; }
  .hero-logo-overlay{ top:18px; }
}

@media (max-width: 600px){
  .hero-logo-overlay img{ width:180px; }
  .hero-logo-overlay{ top:12px; }
}

@media (max-width: 380px){
  /* Esconder em telas muito pequenas para não atrapalhar */
  .hero-logo-overlay{ display:none; }
}

/* Layout responsivo */
.grid {
  display: grid;
  gap: 16px;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}



/* === RAM: paleta e estados (coerente com tema clean) === */
:root{
  --ram-occupied-bg: #e9f2ff;   /* azul clarinho: quadro ocupado */
  --ram-hit-border:  #2e7d32;   /* verde: HIT */
  --ram-fault-border:#c62828;   /* vermelho: FALTA */
  --ram-neutral-bg:  #f9f9f9;
  --ram-neutral-bd:  #cccccc;
}

/* Título + legenda alinhados */
.box-title{
  display:flex; align-items:center; justify-content:space-between; gap:12px;
  margin-bottom:8px;
}

/* Legenda clean */
.legend{display:flex; gap:12px; flex-wrap:wrap;}
.legend .item{display:flex; align-items:center; gap:6px; font-size:13px; color:var(--muted);}
.legend .dot{width:12px; height:12px; border-radius:999px; border:1px solid var(--ram-neutral-bd); background:var(--ram-neutral-bg);}
.legend .dot.fill{background:var(--ram-occupied-bg); border-color:#b7cff1;}
.legend .dot.hit{background:#e8f5e9; border-color:var(--ram-hit-border);}
.legend .dot.fault{background:#ffebee; border-color:var(--ram-fault-border);}

/* Grade de memória com colunas mais largas (melhor leitura) */
.memory-grid{grid-template-columns:repeat(auto-fit,minmax(80px,1fr));}

/* Células e estados */
.cell{
  position:relative;
  border:1px solid var(--ram-neutral-bd);
  border-radius:8px;
  background:var(--ram-neutral-bg);
  padding:10px 8px 12px;
  text-align:center;
  font-size:14px;
  transition:.15s border-color ease, .15s box-shadow ease, .15s background-color ease;
}
.cell.fill{ background:var(--ram-occupied-bg); border-color:#b7cff1; }
.cell.hit{  border-color:var(--ram-hit-border); box-shadow:0 0 0 2px rgba(46,125,50,.15) inset; }
.cell.fault{border-color:var(--ram-fault-border); box-shadow:0 0 0 2px rgba(198,40,40,.15) inset; }

/* Etiquetas nos quadros */
.cell .idx{ position:absolute; top:6px; left:8px; font-size:11px; color:#777; }
.cell .tag{ position:absolute; bottom:6px; right:8px; font-size:11px; color:#777; }
/* Indicador do bit de referência R */
.cell .rbit{ position:absolute; top:6px; right:8px; font-size:11px; padding:0 6px; border-radius:999px; border:1px solid #cfd8dc; background:#fff; font-weight:600; }
.cell .rbit.r1{ background:#e8f5e9; border-color: var(--ram-hit-border); color:#1b5e20; }
.cell .rbit.r0{ background:#ffebee; border-color: var(--ram-fault-border); color:#b71c1c; }

/* Pílula da página pX */
.pill{
  display:inline-block; padding:2px 8px; border-radius:999px;
  border:1px solid #cfd8dc; background:#fff; font-weight:600; font-size:13px;
}

/* === PATCH: Destaque visível para HIT / FAULT (sobrepõe azul do 'fill') === */
.cell.hit{
  background:#e8f5e9 !important;          /* verde claro durante o highlight */
  border-color: var(--ram-hit-border, #2e7d32) !important;
  box-shadow: 0 0 0 2px rgba(46,125,50,.15) inset;
}
.cell.fault{
  background:#ffebee !important;           /* vermelho claro durante o highlight */
  border-color: var(--ram-fault-border, #c62828) !important;
  box-shadow: 0 0 0 2px rgba(198,40,40,.15) inset;
}


/* === Overlay de setas animadas (RAM <-> Disco) === */
.arrow-layer{
  position:fixed;
  inset:0;
  width:100vw;
  height:100vh;
  pointer-events:none;
  z-index:999;
}
.arrow-path{
  fill:none;
  stroke-width:3;
  stroke: #1976d2; /* azul padrão; pode ser sobrescrito via style */

  /* Evita que o logo sobreponha o conteúdo: adiciona espaçamento superior ao container quando o overlay está presente */
  .hero-logo-overlay + .container{
    padding-top: 220px; /* ajustável conforme o tamanho do logo */
  stroke-linecap:round;
  stroke-linejoin:round;
  marker-end:url(#arrowhead);
  stroke-dasharray: 6 10;
  animation: dash-move 800ms linear forwards;
  filter: drop-shadow(0 1px 0 rgba(0,0,0,.12));
}

@keyframes dash-move{
    .hero-logo-overlay{ top:8px; }
    .hero-logo-overlay + .container{ padding-top: 140px; }
  15% { opacity: .95; }
  100% { stroke-dashoffset: 0; opacity: 1; }
}

/* cores semânticas para as direções */
    .hero-logo-overlay + .container{ padding-top: 0; }
.arrow-in   { stroke: #2e7d32; } /* disco -> RAM (carregar) */
.arrow-out  { stroke: #c62828; } /* RAM -> disco (swap out) */