* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background: #0b1c24;
  color: #ffffff;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

#content {
  flex: 1;
  padding-bottom: 60px;
}

.tab {
  display: none;
  padding: 16px;
}

.tab.active {
  display: block;
}

#bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  display: flex;
  background: #04141b;
  border-top: 1px solid #12303d;
}

.nav-btn {
  flex: 1;
  background: none;
  border: none;
  color: #bbb;
  font-size: 20px;
  cursor: pointer;
}

.nav-btn.active {
  color: #00e0ff;
}
#result-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
}

.overlay-box {
  background: #111;
  color: #fff;
  padding: 20px;
  border-radius: 12px;
  text-align: center;
}