* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    width: 100%;
    height: 100%;
}

.app-shell {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.page-content {
    width: 100%;
    height: 100%;
    overflow: auto;
}

.bottom-navigation {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    border-radius: 9999px;
    padding: 12px;
    display: flex;
    gap: 12px;
    align-items: center;
    z-index: 1000;
}

.nav-button {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    cursor: pointer;
    color: rgba(255, 255, 255, 0.7);
}

.nav-button.active {
    background: rgba(79, 209, 199, 0.25);
    color: #4fd1c7;
}

.nav-icon {
    width: 24px;
    height: 24px;
}