明暗（レイアウト）
https://gyazo.com/6a2d1f39cf649176b71c2a7887b26ec0
むしろ明暗の境界にいく気がする...
縦長のフォームを書く場合に上半分を照らして下半分を影の中に置く場合をハーフシャドウという 実例
https://gyazo.com/183f61307cf17478caaf4b775621fecb https://twitter.com/TUGOdoodle/status/1457699189987500033
https://pbs.twimg.com/media/GA_R9QTbUAAem1e.jpg
https://gyazo.com/50472ddeddddda194c0358c862ae8e06 https://twitter.com/sui5o/status/1250417920145932294https://gyazo.com/114d7aa2a59103d9bafbd03698a8ff3c https://twitter.com/osiriseijin/status/1466030307010768898
https://gyazo.com/a0bae33c3d98e487ea235c9eb43499f5 https://twitter.com/pbro_illustrtr/status/1431959647347363849https://gyazo.com/7547fd80d063c61e27fb95a178020599 https://twitter.com/zikataro/status/1414256468979683334https://gyazo.com/18c1301c58e0453588270d69997dcdc0 https://twitter.com/f_osakana/status/1369336605811630080https://gyazo.com/c8f20ba77fe44684deded4e84e524e57 https://twitter.com/wttn3tpkt/status/1335236614075736064https://gyazo.com/e6d2d95177b065fba3e2cbd339745598 https://twitter.com/mebarunrun/status/1154718787641286656https://gyazo.com/c86005f6d30f12825786e8d52ebde5c1 https://twitter.com/ga673899/status/1261608554164674561
[https://gyazo.com/cb58ac5a3f7b0fc63a242eb358716045 https://twitter.com/__lm7__/status/1295016623577763845https://gyazo.com/a74022c9b68cfa50d7e3316ce9c1a6b9 https://twitter.com/tentenchan4545/status/1601178625666994178