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

body {
  font-family:
    "Noto Sans",
    "Noto Sans JP",
    -apple-system,
    BlinkMacSystemFont,
    sans-serif;
  background-color: #f8fafc;
  color: #0f172a;
  height: 100vh;
  overflow: hidden;
}

.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
}

.header {
  height: 56px;
  background-color: #ffffff;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  z-index: 10;
}

.header h1 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #1e293b;
}

.content {
  flex: 1;
  width: 100%;
  position: relative;
  background-color: #e2e8f0;
}

.flyer-frame {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.flyer-frame.active {
  opacity: 1;
  pointer-events: auto;
  z-index: 5;
}

.bottom-nav {
  height: calc(64px + env(safe-area-inset-bottom, 0px));
  padding-bottom: env(safe-area-inset-bottom, 0px);
  background-color: #ffffff;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
  display: flex;
  justify-content: space-around;
  align-items: center;
  flex-shrink: 0;
  z-index: 10;
}

.nav-item {
  background: none;
  border: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  color: #94a3b8;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  flex: 1;
  height: 100%;
  font-family: inherit;
  transition: color 0.2s ease;
}

.nav-item .icon {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.nav-item.active {
  color: #2563eb;
}