/* ============================================================
   ImgViewer · 四端共用图片查看器样式（后台 / 资源库 / 主页 / 分享页）
   变量按「主页 --text-dim/--card-border → 其他端 --dim/--border」的顺序兜底，
   任何主题、任何页面挂上都能读
   ============================================================ */

.iv-host { width: 100%; }
.iv-wrap { display: flex; flex-direction: column; gap: 10px; }

.iv-stage {
  position: relative;
  height: min(70vh, 680px);
  min-height: 240px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--card-border, var(--border, rgba(255, 255, 255, .1)));
  background:
    radial-gradient(120% 90% at 50% 0%, color-mix(in srgb, var(--accent) 6%, transparent), transparent 60%),
    rgba(2, 4, 10, .55);
  cursor: grab;
  touch-action: pan-y;             /* R22：默认放行纵向滚动；横向/下滑/放大平移由 JS 置 none */
  outline: none;
}
.iv-stage:focus-visible { box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent, #37d6a8) 35%, transparent); }
/* T08 R22：左右切换条（nav 契约存在时由模板注入） */
.iv-nav {
  position: absolute; left: 8px; right: 8px; top: 50%; transform: translateY(-50%);
  display: flex; justify-content: space-between; pointer-events: none; z-index: 3;
}
.iv-nav-btn {
  pointer-events: auto; min-width: 44px; min-height: 44px;  /* R22-3 命中区 */
  font-size: 26px; line-height: 1; color: var(--text, #e8ecf5);
  background: rgba(8, 12, 24, .55); border: 1px solid var(--card-border, rgba(255,255,255,.14));
}@media (hover: hover) and (pointer: fine) {

.iv-nav-btn:hover{ border-color: var(--accent, #37d6a8); color: var(--accent, #37d6a8); }
}
.iv-stage.iv-grabbing { cursor: grabbing; }
.iv-stage.iv-fit { cursor: zoom-in; }

.iv-img {
  /* 绝对定位居中：max-height:100% 只有在「参照物高度固定」时才生效，
     grid/flex 自动行里会被图片自身撑开而失效 → 竖图被裁成横条（比例失真） */
  position: absolute;
  inset: 0;
  margin: auto;
  width: auto;
  height: auto;
  max-width: calc(100% - 16px);
  max-height: 100%;
  object-fit: contain;
  transform-origin: center center;
  transition: opacity .22s ease;
  user-select: none;
  -webkit-user-drag: none;
  will-change: transform;
}

/* 工具条 */
.iv-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 8px 10px;
  border-radius: var(--radius);
  border: 1px solid var(--card-border, var(--border, rgba(255, 255, 255, .1)));
  background: var(--panel, var(--card, rgba(255, 255, 255, .04)));
  font-size: 12.5px;
}
.iv-btn {
  min-width: 44px; min-height: 44px;   /* R22-3 触屏命中区 */
  height: auto;
  padding: 0 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  line-height: 1;
  color: var(--text, #dbe4ff);
  background: rgba(255, 255, 255, .05);
  border: 1px solid var(--card-border, var(--border, rgba(255, 255, 255, .12)));
  transition: background .18s, border-color .18s, transform .1s;
}@media (hover: hover) and (pointer: fine) {

.iv-btn:hover{ background: color-mix(in srgb, var(--accent, #37d6a8) 12%, transparent); border-color: color-mix(in srgb, var(--accent, #37d6a8) 35%, transparent); }
}
.iv-btn:active { transform: scale(.96); }
.iv-zoom {
  min-width: 52px;
  text-align: center;
  color: var(--accent, #37d6a8);
  font-variant-numeric: tabular-nums;
}
.iv-sep { width: 1px; height: 18px; background: var(--border, rgba(255, 255, 255, .12)); }
.iv-size { color: var(--text-dim, var(--dim, #8fa0bd)); }
.iv-hint { margin-left: auto; color: var(--text-dim, var(--dim, #8fa0bd)); font-size: 11.5px; }

/* 加载态 */
.iv-loading {
  position: absolute;
  left: 12px;
  bottom: 12px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(2, 6, 14, .72);
  border: 1px solid var(--card-border, var(--border, rgba(255, 255, 255, .12)));
  color: var(--text-dim, var(--dim, #9fb0d8));
  font-size: 12px;
  pointer-events: none;
}
.iv-spin {
  width: 13px; height: 13px;
  border-radius: 50%;
  border: 2px solid color-mix(in srgb, var(--accent, #37d6a8) 25%, transparent);
  border-top-color: var(--accent, #37d6a8);
  animation: iv-spin .8s linear infinite;
}
@keyframes iv-spin { to { transform: rotate(360deg); } }

@media (max-width: 768px) {
  .iv-stage { height: min(58vh, 460px); min-height: 200px; border-radius: var(--radius); }
  .iv-bar { gap: 6px; padding: 7px 8px; }
  .iv-hint { display: none; }
  .iv-btn { height: 44px; }        /* 手机拇指友好（R22-3） */
}