/*
 * Under Sketchbook Board - 우측 플로팅 컨트롤
 * - 리스트: 위/아래 스크롤
 * - 뷰: 리스트/글쓰기/댓글/하단
 * - 아이콘 애니메이션 + 툴팁( data-sk-tip ) 지원
 */

.sk-board .sk-fab {
  position: fixed;
  /* 기본값은 화면 우측. JS가 게시판 박스 우측에 붙도록 left/right를 동적으로 보정함 */
  right: clamp(12px, 2.2vw, 22px);
  left: auto;
  top: 120px; /* JS가 보드 위치에 맞춰 보정 */
  bottom: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none; /* 컨테이너는 클릭 불가, 버튼만 가능 */
}

@media ( max-width: 576px ) { 
  .sk-board .sk-fab { display: none; }
 }

.sk-board .sk-fab.is-hidden {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 180ms ease, transform 220ms cubic-bezier(.4,0,1,1);
}

.sk-board .sk-fab.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 220ms ease, transform 260ms cubic-bezier(.16,1,.3,1);
}

.sk-board .sk-fab__group {
  display: flex;
  flex-direction: column;
  gap: 0;
  pointer-events: none;
}

.sk-board .sk-fab__btn {
  pointer-events: auto;
  position: relative;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-left: none;
  border-radius: 0;
  background:
    radial-gradient(120% 140% at 20% 10%, rgba(255,255,255,0.95) 0%, rgba(255,255,255,0.72) 55%, rgba(255,255,255,0.62) 100%),
    linear-gradient(180deg, rgba(255,255,255,0.92) 0%, rgba(255,255,255,0.78) 100%);
  color: var(--sk-accent-h, #4338ca);
  box-shadow: none;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  outline: none;
  display: grid;
  place-items: center;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transform: translateZ(0);
}

/* 그룹을 "한 덩어리" 카드처럼 */
.sk-board .sk-fab__group {
  background: rgba(255,255,255,0.66);
  border-radius: 0px 14px 14px 0px;
  box-shadow: none;
  /* 툴팁 말풍선이 잘리지 않도록 숨김 금지 */
  overflow: visible;
}

.sk-board .sk-fab__btn + .sk-fab__btn {
  border-top: 1px solid rgba(15,23,42,0.08);
}

.sk-board .sk-fab__btn:first-child {
  border-top-right-radius: 14px;
}
.sk-board .sk-fab__btn:last-child {
  border-bottom-right-radius: 14px;
}

.sk-board .sk-fab__btn::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(110% 140% at 20% 10%, rgba(99,102,241,0.18) 0%, rgba(99,102,241,0.06) 55%, transparent 100%);
  opacity: 0;
  transition: opacity 180ms ease;
  pointer-events: none;
}

.sk-board .sk-fab__btn:hover::after,
.sk-board .sk-fab__btn:focus-visible::after {
  opacity: 1;
}

.sk-board .sk-fab__btn:hover,
.sk-board .sk-fab__btn:focus-visible {
  border-color: rgba(99,102,241,0.22);
  box-shadow: none;
}

.sk-board .sk-fab__btn:active {
  transform: translateY(1px);
}

.sk-board .sk-fab__btn .sk-ico {
  font-size: 16px;
  line-height: 1;
  filter: drop-shadow(0 1px 0 rgba(255,255,255,0.55));
  transition: transform 260ms cubic-bezier(.16,1,.3,1);
}

/* 아이콘 프리미엄 모션 */
.sk-board .sk-fab__btn:hover .sk-ico,
.sk-board .sk-fab__btn:focus-visible .sk-ico {
  transform: translateY(-1px) scale(1.05);
}

.sk-board .sk-fab__btn[data-ub-fab-action="top"]:hover .sk-ico,
.sk-board .sk-fab__btn[data-ub-fab-action="top"]:focus-visible .sk-ico {
  animation: skFabBounceUp 520ms cubic-bezier(.16,1,.3,1) both;
}

.sk-board .sk-fab__btn[data-ub-fab-action="bottom"]:hover .sk-ico,
.sk-board .sk-fab__btn[data-ub-fab-action="bottom"]:focus-visible .sk-ico {
  animation: skFabBounceDown 520ms cubic-bezier(.16,1,.3,1) both;
}

@keyframes skFabBounceUp {
  0%   { transform: translateY(0) scale(1); }
  45%  { transform: translateY(-3px) scale(1.06); }
  100% { transform: translateY(-1px) scale(1.05); }
}

@keyframes skFabBounceDown {
  0%   { transform: translateY(0) scale(1); }
  45%  { transform: translateY(2px) scale(1.06); }
  100% { transform: translateY(1px) scale(1.05); }
}

/* 구분선(그룹 사이) */
.sk-board .sk-fab__divider {
  width: 100%;
  height: 6px;
  pointer-events: none;
  position: relative;
}
.sk-board .sk-fab__divider::before {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  top: 50%;
  height: 1px;
  transform: translateY(-50%);
  background: linear-gradient(90deg, transparent 0%, rgba(15,23,42,0.14) 20%, rgba(15,23,42,0.14) 80%, transparent 100%);
}

/* data-sk-tip 툴팁: 우측 플로팅용(좌측으로 뜨는 타입) */
.sk-board .sk-fab [data-sk-tip] {
  --sk-tip-arrow: 7px;
  z-index: 0;
}

/* FAB는 상위 overflow 영향을 많이 받으므로, 말풍선은 JS 포탈 툴팁으로 표시 */
.sk-board .sk-fab [data-sk-tip]::after,
.sk-board .sk-fab [data-sk-tip]::before {
  display: none;
}

.sk-board .sk-fab [data-sk-tip]:hover,
.sk-board .sk-fab [data-sk-tip]:focus-visible {
  z-index: 8;
}

/* JS 포탈 툴팁 */
.sk-fab-portal-tip {
  position: fixed;
  z-index: 10050;
  padding: 6px 10px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: -0.02em;
  white-space: nowrap;
  color: #fff;
  background: rgba(67, 56, 202, 0.94);
  border: 1px solid rgba(99,102,241,0.34);
  border-radius: 10px;
  box-shadow: none;
  pointer-events: none;
  opacity: 0;
  transform: translateY(-50%) translateX(6px);
  transition: opacity 120ms ease, transform 120ms ease;
}
.sk-fab-portal-tip.is-on {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}
.sk-fab-portal-tip::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -7px;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-top: 7px solid transparent;
  border-bottom: 7px solid transparent;
  border-left: 7px solid rgba(67, 56, 202, 0.94);
}

/* 모바일에선 툴팁 과밀 방지 */
@media (max-width: 640px) {
  .sk-board .sk-fab [data-sk-tip]::after,
  .sk-board .sk-fab [data-sk-tip]::before {
    display: none;
  }
  .sk-board .sk-fab__btn {
    width: 36px;
    height: 36px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .sk-board .sk-fab,
  .sk-board .sk-fab * {
    transition: none !important;
    animation: none !important;
  }
}