/*
实现原理：承载帖子详情页、图片查看器、加载动画和图片容器样式。
如何使用：入口页在 styles.css 之后加载本文件。
*/

.viewer {
  width: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  background: #0d1020;
  color: #f6f7ff;
}

.viewer-head {
  position: sticky;
  top: 0;
  z-index: 30;
  background: linear-gradient(180deg, rgba(13, 16, 32, 0.96), rgba(13, 16, 32, 0.72));
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(14px);
  padding: calc(8px + env(safe-area-inset-top)) 10px 8px;
}

.viewer-toolbar {
  flex-wrap: nowrap;
  margin-bottom: 6px;
  position: relative;
}

.viewer-title {
  margin: 4px 0 0;
  color: #ffffff;
  font-size: 16px;
  line-height: 1.35;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.viewer-toolbar-main {
  display: flex;
  gap: 6px;
  align-items: center;
}

.viewer-toolbar-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.viewer-actions-menu > .viewer-toolbar-actions {
  display: flex;
}

.viewer-actions-menu {
  --actions-border: rgba(255, 255, 255, 0.14);
  --actions-bg: rgba(13, 16, 32, 0.96);
  --actions-shadow: 0 18px 48px rgba(0, 0, 0, 0.34);
  --actions-z: 80;
}

.images.vertical img {
  width: 100%;
  height: auto;
  display: block;
  margin-bottom: 10px;
}

.images.horizontal {
  height: calc(100vh - 120px);
  height: calc(100dvh - 120px);
  overflow-x: auto;
  overflow-y: hidden;
  white-space: nowrap;
  padding: 8px;
}

.images.horizontal img {
  height: 100%;
  width: auto;
  margin-right: 8px;
}

.slide-shell {
  position: relative;
  display: grid;
  place-items: center;
  min-height: calc(100vh - 120px);
  min-height: calc(100dvh - 120px);
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 38%, rgba(255, 255, 255, 0.06), transparent 38%),
    #0f1224;
  touch-action: pan-y;
}

.slide-image-stage {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 10px 0 62px;
}

.slide-shell img {
  max-width: 100%;
  max-height: calc(100vh - 158px);
  max-height: calc(100dvh - 158px);
  object-fit: contain;
  -webkit-user-drag: none;
  user-select: none;
}

.slide-nav-zone {
  position: absolute;
  top: 0;
  bottom: 0;
  z-index: 3;
  width: 36%;
  min-height: 100%;
  padding: 0;
  appearance: none;
  -webkit-tap-highlight-color: transparent;
  border-radius: 0;
  background: transparent;
  color: rgba(223, 227, 255, 0.68);
  font-size: 44px;
  box-shadow: none;
  outline: none;
  touch-action: manipulation;
}

.slide-nav-zone:hover,
.slide-nav-zone:focus,
.slide-nav-zone:active {
  background: transparent;
  box-shadow: none;
  outline: none;
}

.slide-nav-prev {
  left: 0;
  text-align: left;
}

.slide-nav-next {
  right: 0;
  text-align: right;
}

.slide-nav-zone span {
  display: inline-grid;
  width: 64px;
  height: 100%;
  place-items: center;
  opacity: 0;
  pointer-events: none;
  transition: none;
}

.slide-nav-zone .ui-icon {
  width: 42px;
  height: 42px;
}

.slide-nav-zone:hover span,
.slide-nav-zone:focus-visible span {
  opacity: 0;
  transform: none;
}

.slide-nav-zone:active span {
  opacity: 0;
  transform: none;
}

.slide-status-pill {
  position: absolute;
  left: 50%;
  bottom: max(12px, env(safe-area-inset-bottom));
  z-index: 4;
  min-width: 76px;
  transform: translateX(-50%);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  padding: 8px 14px;
  background: rgba(13, 16, 32, 0.74);
  color: #f8f9ff;
  text-align: center;
  font-weight: 700;
  backdrop-filter: blur(10px);
}

.image-error-card {
  color: #f4f6ff;
  border: 1px dashed #596186;
  border-radius: 10px;
  padding: 12px 14px;
  background: rgba(20, 24, 44, 0.88);
}

.image-error-card p {
  margin: 0 0 10px;
}

.image-error-card button {
  min-height: 40px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 10px 22px rgba(71, 66, 233, 0.2);
}

.loading-shell {
  min-height: calc(100vh - 140px);
  min-height: calc(100dvh - 140px);
  display: grid;
  place-items: center;
  gap: 12px;
  padding: 24px;
}

.spinner,
.mini-spinner {
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

.spinner {
  width: 42px;
  height: 42px;
  border: 4px solid #dfe2f2;
  border-top-color: var(--accent);
}

.loading-tip {
  margin: 0;
  color: #69708a;
}

.viewer-image-container {
  position: relative;
  display: block;
}

.image-loading-indicator {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(13, 16, 32, 0.42);
  opacity: 1;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.viewer-image-container img {
  display: block;
  opacity: 0;
  transition: opacity 0.28s ease;
}

.viewer-image-container img.loaded,
.viewer-image-container img[src]:not([src=""]):not([data-src]) {
  opacity: 1;
}

.viewer-image-container.is-loaded .image-loading-indicator {
  opacity: 0;
}

.mini-spinner {
  width: 24px;
  height: 24px;
  border: 3px solid rgba(223, 226, 242, 0.55);
  border-top-color: var(--accent);
}

.confirm-mask {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: max(16px, env(safe-area-inset-top)) 12px max(16px, env(safe-area-inset-bottom));
  background: rgba(0, 0, 0, 0.58);
}

.confirm-open {
  overflow: hidden;
}

.confirm-panel {
  width: min(96vw, 405px);
  border-radius: 24px;
  padding: 34px 28px 28px;
  background: #fff;
  text-align: center;
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.22);
}

.confirm-mark {
  display: none;
}

.confirm-panel h3 {
  margin: 0 0 22px;
  color: #33343a;
  font-size: 24px;
  font-weight: 800;
  line-height: 1.2;
}

.confirm-panel p {
  margin: 0 0 28px;
  color: #7b7b84;
  font-size: 18px;
  line-height: 1.45;
}

.confirm-panel .confirm-error {
  margin-top: -14px;
  color: var(--danger);
  font-weight: 700;
}

.confirm-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.confirm-actions button {
  width: 100%;
  min-height: 62px;
  border-radius: 999px;
  font-size: 18px;
  font-weight: 700;
  outline: none;
}

.confirm-actions button:focus-visible {
  box-shadow: 0 0 0 3px rgba(71, 66, 233, 0.16);
}

.confirm-cancel,
.confirm-cancel:focus {
  background: linear-gradient(135deg, #f7f7fa, #ececf2);
  color: #74747c;
  box-shadow: none;
}

.confirm-danger,
.confirm-danger:focus,
.cache-storage-retry,
.cache-storage-retry:focus {
  background: linear-gradient(135deg, #4742E9, #7b78ff);
  color: #fff;
  box-shadow: 0 12px 24px rgba(71, 66, 233, 0.24);
}

.confirm-danger.busy {
  opacity: 0.74;
  cursor: progress;
}

.confirm-danger.busy .ui-icon {
  animation: spin 0.9s linear infinite;
}

.cache-storage-gate {
  z-index: 1200;
}

.cache-storage-gate .confirm-actions {
  grid-template-columns: 1fr;
}

.images.vertical .viewer-image-container {
  margin-bottom: 10px;
}

.images.vertical .viewer-image-container img {
  width: 100%;
  height: auto;
}

.images.horizontal .viewer-image-container {
  height: 100%;
  display: inline-block;
  margin-right: 8px;
}

.images.horizontal .viewer-image-container img {
  height: 100%;
  width: auto;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 720px) {
  .viewer-toolbar,
  .viewer-toolbar-main {
    gap: 6px;
  }

  .viewer-head {
    padding-left: 8px;
    padding-right: 8px;
  }

  .slide-nav-zone span {
    width: 48px;
    opacity: 0;
  }
}

.viewer-actions-menu.is-collapsed.is-open .mode-switch {
  display: grid;
  border-radius: 12px;
}

.viewer-actions-menu.is-collapsed.is-open .mode-switch button {
  width: 100%;
  justify-content: flex-start;
  padding: 0 14px;
  border-radius: 12px;
}