:root {
  --bg: #0b0f17;
  --text: #e5e7eb;
  --muted: #9ca3af;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Arial;
  color: var(--text);
  background: var(--bg);
}

a { color: inherit; }
.muted { color: var(--muted); }

.app-shell {
  min-height: 100vh;
  padding-bottom: 52px; /* espaço da taskbar */
}

/* ===========================
   BOTÃO GLOBAL DE FECHAR APP
   =========================== */

.app-close{
  display: inline-flex;
  align-items: center;
  justify-content: center;

  width: 38px;
  height: 30px;

  margin-left: 12px;

  text-decoration: none;
  font-size: 16px;
  font-weight: 500;

  border-radius: 8px;

  color: white;
  background: #e81123; /* vermelho estilo Windows */
  border: 1px solid rgba(0,0,0,0.2);

  transition: background .15s ease, transform .05s ease;
}

.app-close:hover{
  background: #f1707a;
}

.app-close:active{
  transform: translateY(1px);
}