/* 페이지 뒤로가기 전용 플로팅 버튼 */
.page-back-floating-btn {
    position: fixed;
    bottom: 80px;
    right: 5px;
    width: 55px;
    height: 55px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: #fff !important;
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    font-size: 28px;
    font-family: Arial, sans-serif;
    font-weight: bold;
    cursor: pointer;
    z-index: 9998;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), background 0.2s;
    padding: 0;
    line-height: 0; /* 강제로 높이를 0으로 만들어 중앙 정렬 유도 */
    padding-bottom: 4px; /* < 기호 특성상 약간 위로 쏠리는 현상 보정 */
}
.page-back-floating-btn:hover { 
    background: rgba(0, 0, 0, 0.7); 
    transform: scale(1.05); 
}

/* 화면 우측 끝 도움말 핸들 */
.page-guide-handle {
    position: fixed;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 25px;
    height: 100px;
    background: rgba(77, 149, 150, 0.6);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    color: white;
    border-radius: 10px 0 0 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 9997;
    writing-mode: vertical-rl;
    text-orientation: upright;
    font-size: 11px;
    font-weight: bold;
    letter-spacing: 2px;
    box-shadow: -2px 0 10px rgba(0,0,0,0.1);
    transition: width 0.2s, background 0.2s;
}
.page-guide-handle:hover {
    width: 35px;
    background: rgba(77, 149, 150, 0.9);
}

/* 어두운 배경 (Backdrop) */
.page-guide-backdrop {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.4); z-index: 9999; display: none;
}

/* 우측 슬라이드 사이드바 */
.page-guide-sidebar {
    position: fixed; top: 0; right: -400px;
    width: 350px; max-width: 90vw; height: 100%;
    background: #fff; box-shadow: -2px 0 15px rgba(0,0,0,0.1);
    z-index: 10000; transition: right 0.3s ease-in-out;
    display: flex; flex-direction: column;
}
.page-guide-sidebar.open { right: 0; }

.pg-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 20px; border-bottom: 1px solid #eee; background-color: #f8f9fa;
}
.pg-header h3 { margin: 0; font-size: 18px; color: #333; font-weight: bold; }
.pg-close-btn { background: none; border: none; font-size: 28px; color: #999; cursor: pointer; }

.pg-body { padding: 20px; overflow-y: auto; flex: 1; }
.pg-desc { 
    font-size: 14px; color: #555; line-height: 1.6; margin-bottom: 20px; 
    white-space: normal; word-break: break-all; 
}
.pg-tips-list { list-style: none; padding: 0; margin: 0; }
.pg-tips-list li {
    font-size: 14px; color: #444; background: #f1f8f8; padding: 15px;
    border-radius: 8px; margin-bottom: 10px; line-height: 1.5; border-left: 4px solid #4d9596;
    white-space: normal; word-break: break-all;
}
.pg-tips-list li b { color: #2b5657; display: block; margin-bottom: 4px; }