/* =============================================================
   협업 콘텐츠 — 호버 시 커서를 따라오는 이미지 프리뷰 리스트
   ============================================================= */

.collab-wrap { margin-top: var(--space-16); }
.collab-wrap__label {
  font-size: var(--fs-small); font-weight: var(--fw-bold);
  letter-spacing: .18em; color: var(--color-coral-deep); margin-bottom: var(--space-3);
}
.collab-wrap__title {
  font-size: clamp(1.4rem, 2.2vw, 1.9rem); font-weight: var(--fw-bold);
  line-height: 1.25; letter-spacing: var(--ls-tight); margin: 0 0 var(--space-6);
  color: var(--color-ink);
}

/* 큰 박스 (채널 카드와 동일한 윤곽) */
.collab {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
/* 2열 컴팩트: 01~09 좌측, 10~17 우측 (열 방향 채움) */
.collab__list {
  list-style: none; margin: 0;
  padding: var(--space-4);
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: repeat(9, auto);
  grid-auto-flow: column;
  gap: 3px var(--space-6);
}

.collab__item {
  position: relative;
  display: flex; align-items: center; gap: var(--space-3);
  padding: 10px var(--space-4);
  border-radius: 11px;
  cursor: pointer;
  transition: opacity .3s ease, background-color .2s ease;
}

.collab__idx {
  flex: none; width: 2.5ch;
  font-size: .78rem; font-weight: var(--fw-bold); color: var(--color-subtext);
  font-variant-numeric: tabular-nums; transition: color .25s ease;
}
.collab__name {
  font-size: clamp(.95rem, 1.2vw, 1.12rem); font-weight: var(--fw-semibold);
  color: var(--color-ink); line-height: 1.3;
  transition: transform .3s cubic-bezier(.2,.8,.2,1), color .25s ease;
}
.collab__arrow {
  margin-left: auto; flex: none; color: var(--color-ink);
  opacity: 0; transform: translateX(-8px);
  transition: opacity .25s ease, transform .25s ease;
}
.collab__arrow svg { width: 18px; height: 18px; display: block; }

/* hover 상태: 활성 행 강조 + 나머지 흐리게 */
.collab__list.is-hovering .collab__item:not(.is-active) { opacity: .3; }
.collab__item.is-active { background: var(--color-paper-soft); }
.collab__item.is-active .collab__idx { color: var(--color-coral-deep); }
.collab__item.is-active .collab__name { transform: translateX(6px); }
.collab__item.is-active .collab__arrow { opacity: 1; transform: translateX(0); }

/* ---------------- 커서 추적 프리뷰 ---------------- */
.collab__preview {
  position: fixed; left: 0; top: 0; z-index: 60; pointer-events: none;
  transform: translate(var(--cx, -200px), var(--cy, -200px));
  transition: transform .16s cubic-bezier(.2,.8,.2,1);
  will-change: transform;
}
.collab__preview-inner {
  position: relative;
  width: 300px; height: 200px;
  transform: translate(28px, -50%) scale(.9);
  opacity: 0;
  transition: opacity .22s ease, transform .22s cubic-bezier(.2,.8,.2,1);
  border-radius: var(--radius-md); overflow: hidden;
  box-shadow: var(--shadow-md);
  background:
    radial-gradient(120% 110% at 0% 0%, rgba(233,255,112,.30), transparent 58%),
    var(--color-ink);
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: var(--space-6);
}

/* 실제 이미지 레이어 (data-img 있을 때) */
.collab__preview-img {
  position: absolute; inset: 0; z-index: 0;
  background-size: cover; background-position: center;
  opacity: 0; transition: opacity .2s ease;
}
.collab__preview-img::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(transparent 35%, rgba(10,14,11,.82));
}
.collab__preview.has-img .collab__preview-img { opacity: 1; }
.collab__preview-eyebrow, .collab__preview-title { position: relative; z-index: 1; }
.collab__preview[data-variant="1"] .collab__preview-inner {
  background:
    radial-gradient(120% 110% at 0% 0%, rgba(239,158,120,.34), transparent 58%),
    var(--color-ink);
}
.collab__preview.is-visible .collab__preview-inner { opacity: 1; transform: translate(28px, -50%) scale(1); }

.collab__preview-eyebrow {
  font-size: .7rem; font-weight: var(--fw-bold); letter-spacing: .16em;
  color: var(--color-lime); margin-bottom: var(--space-2);
}
.collab__preview[data-variant="1"] .collab__preview-eyebrow { color: var(--color-coral); }
.collab__preview-title {
  font-size: 1.05rem; font-weight: var(--fw-bold); line-height: 1.3; color: #fff;
}

/* ---------------- Responsive (터치: 프리뷰 비활성) ---------------- */
@media (max-width: 720px) {
  .collab__list { grid-template-columns: 1fr; grid-auto-flow: row; grid-template-rows: none; }
}
@media (hover: none), (max-width: 720px) {
  .collab__preview { display: none; }
  .collab__list.is-hovering .collab__item:not(.is-active) { opacity: 1; }
}