body {
  background-color: #008080; /* 例のクラシックグリーン */
  font-family: "MS PGothic", "?? ????", sans-serif;
  margin: 0;
  padding: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 90vh;
}

.browser-window {
  width: 100%;
  max-width: 650px;
  background-color: #d4d0c8; /* 例のクラシックグレー */
  border-top: 2px solid #fff;
  border-left: 2px solid #fff;
  border-right: 2px solid #404040;
  border-bottom: 2px solid #404040;
  box-shadow: 1px 1px 0px 0px #000;
  padding: 2px;
}

.title-bar {
  background: linear-gradient(90deg, #000080, #1084d0);
  color: #fff;
  padding: 4px 6px;
  font-weight: bold;
  font-size: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.title-buttons {
  font-size: 10px;
  background-color: #d4d0c8;
  color: #000;
  border: 1px solid #fff;
  box-shadow: 1px 1px 0 #000;
  padding: 0 4px;
}

.menu-bar {
  font-size: 12px;
  padding: 4px;
  border-bottom: 1px solid #808080;
  color: #000;
}
.menu-bar span {
  margin-right: 10px;
  cursor: pointer;
}

.toolbar {
  display: flex;
  padding: 4px;
  border-bottom: 1px solid #808080;
  gap: 5px;
}
.nav-btn {
  font-size: 12px;
  background-color: #d4d0c8;
  border-top: 1px solid #fff;
  border-left: 1px solid #fff;
  border-right: 1px solid #404040;
  border-bottom: 1px solid #404040;
  padding: 2px 6px;
  cursor: pointer;
  user-select: none;
}
.nav-btn:active {
  border-top: 1px solid #404040;
  border-left: 1px solid #404040;
  border-right: 1px solid #fff;
  border-bottom: 1px solid #fff;
}

.address-bar-zone {
  display: flex;
  align-items: center;
  padding: 4px;
  border-bottom: 2px solid #808080;
  font-size: 12px;
}
.address-input {
  flex-grow: 1;
  margin-left: 5px;
  background-color: #fff;
  border: 1px inset #808080;
  padding: 2px 5px;
  font-family: monospace;
  font-size: 12px;
  color: #000;
}

.web-content-frame {
  width: calc(100% - 8px);
  height: 400px;
  margin: 4px;
  border: 2px inset #808080;
  background-color: #fff;
}