body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(135deg, #1a3c6e 0%, #2d6cb4 40%, #4a9fe5 100%);
  font-family: "Segoe UI", Tahoma, sans-serif;
  padding: 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 16px;
}

.window {
  max-width: 420px;
  width: 100%;
  box-shadow: 2px 4px 16px rgba(0,0,0,0.3);
  transition: opacity 0.2s, transform 0.2s;
}

.window.minimized .window-body,
.window.minimized .status-bar,
.window.minimized menu[role="tablist"] {
  display: none;
}

.window.closed {
  opacity: 0;
  transform: scale(0.95);
  pointer-events: none;
}

.window-body {
  padding: 12px;
}

.window-body p {
  margin: 0 0 8px;
  font-size: 13px;
  line-height: 1.5;
}

.window-body p:last-child {
  margin-bottom: 0;
}

.window-body ul {
  margin: 4px 0 8px;
  padding-left: 20px;
  font-size: 13px;
  line-height: 1.6;
}

.status-bar {
  font-size: 12px;
}

.nav-links {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  width: 100%;
  margin-bottom: 4px;
}

.nav-links a {
  color: #fff;
  text-decoration: none;
  font-size: 12px;
  padding: 2px 8px;
  background: rgba(255,255,255,0.15);
  border-radius: 3px;
}

.nav-links a:hover {
  background: rgba(255,255,255,0.3);
}

.nav-links a.current {
  background: rgba(255,255,255,0.35);
  font-weight: bold;
}

.btn-row {
  display: flex;
  gap: 6px;
  justify-content: flex-end;
}

/* mobile: stack everything, bigger tap targets */
@media (max-width: 600px) {
  body {
    padding: 10px;
    gap: 10px;
    flex-direction: column;
    align-items: stretch;
  }

  .window {
    max-width: 100%;
  }

  .nav-links {
    gap: 4px;
  }

  .nav-links a {
    font-size: 13px;
    padding: 6px 12px;
    flex: 1;
    text-align: center;
  }

  .window-body {
    padding: 10px;
  }

  .window-body p,
  .window-body ul {
    font-size: 14px;
  }

  .btn-row {
    gap: 8px;
  }

  .btn-row button,
  button {
    min-height: 32px;
    padding: 4px 12px;
  }

  .status-bar {
    font-size: 11px;
  }

  /* make inputs/selects full-width and tappable */
  input[type="text"],
  input[type="search"],
  textarea,
  select {
    font-size: 16px; /* prevents iOS zoom */
  }

  input[type="range"] {
    height: 24px;
  }
}