.study-head{position:fixed;z-index:31;top:max(14px,env(safe-area-inset-top));left:max(16px,env(safe-area-inset-left));display:flex;align-items:center;gap:14px}.study-back{display:inline-flex;align-items:center;padding:6px 14px;font-family:var(--gothic);font-size:12.5px;letter-spacing:.08em;color:#edebe4c7;text-decoration:none;background:#08080cb8;border:1px solid rgba(237,235,228,.28);border-radius:9999px;backdrop-filter:blur(8px);transition:color .3s var(--ease),border-color .3s var(--ease)}.study-back:hover,.study-back:focus-visible{color:#edebe4;border-color:#edebe48c}.study-id{display:flex;align-items:baseline;gap:10px}.study-no{font-family:var(--mono);font-size:12.5px;letter-spacing:.22em;color:var(--washi-faint)}.study-name{font-family:var(--mincho);font-size:17px;letter-spacing:.18em;color:var(--washi-dim)}.study-name .kanji{letter-spacing:0;margin-right:4px}