/* Two gently curved photo rails, inspired by ljj-world's desk gallery. */
body:has(.rikka-gallery) #content-inner { max-width: 1600px; padding: 28px 0 48px; }
body:has(.rikka-gallery) #page-header { height: 64px; }
body:has(.rikka-gallery) #web_bg { background: var(--rk-surface); }
body:has(.rikka-gallery) #web_bg::before { display: none; }
.rikka-gallery { --rg-gutter: clamp(24px, 5vw, 80px); width: 100%; min-width: 0; color: var(--rk-ink); background: var(--rk-surface); }
.rikka-gallery :is(h1,h2,h3,p) { margin: 0; }
.rikka-gallery :is(h1,h2,h3) { color: inherit; text-wrap: balance; }
.rikka-gallery a { color: var(--rk-accent); }
.rg-intro { display: grid; grid-template-columns: 1fr auto; grid-template-areas: "title back" "note back"; align-items: center; column-gap: 24px; padding: 0 var(--rg-gutter); }
.rg-back { grid-area: back; display: inline-flex; align-items: center; min-height: 44px; margin-bottom: 0; font-size: 13px; }
.rg-intro h1 { grid-area: title; font-size: clamp(30px, 3vw, 42px); letter-spacing: -.025em; line-height: 1.35; }
.rg-intro > p { grid-area: note; margin-top: 8px; color: var(--rk-muted); font-size: 15px; line-height: 1.8; }
.rg-toolbar { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px 24px; margin: 24px var(--rg-gutter) 12px; padding-bottom: 20px; border-bottom: 1px solid color-mix(in srgb, var(--rk-muted) 22%, transparent); }
.rg-toolbar-meta { display: flex; align-items: center; gap: 16px; }
.rg-toolbar-meta p { color: var(--rk-muted); font-size: 13px; }
.rg-filters { display: flex; flex-wrap: wrap; gap: 4px; }
.rikka-gallery [hidden] { display: none !important; }
.rg-filters button, .rg-motion { min-height: 44px; padding: 8px 16px; background: transparent; border: 0; color: var(--rk-muted); border-radius: 8px; cursor: pointer; font: inherit; font-size: 14px; }
.rg-filters button[aria-pressed='true'] { background: var(--rk-accent); color: var(--rk-surface); }
.rg-filters button:hover, .rg-motion:hover { background: color-mix(in srgb, var(--rk-accent) 12%, transparent); color: var(--rk-ink); }
.rg-filters button[aria-pressed='true']:hover { background: var(--rk-accent); color: var(--rk-surface); }
.rg-motion { padding-inline: 8px; color: var(--rk-accent); }
.rg-collection { display: flex; flex-direction: column; gap: 4px; }
.rg-shelf { --rg-photo-height: clamp(164px, 21dvh, 236px); --rg-arc-space: 36px; min-width: 0; }
.rg-shelf-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin: 0 var(--rg-gutter); min-height: 48px; }
.rg-shelf-head h2 { font-size: 15px; font-weight: 600; }
.rg-shelf-nav { display: flex; align-items: center; gap: 8px; }
.rg-shelf-position { margin-right: 8px; color: var(--rk-muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.rg-shelf-nav button { width: 44px; height: 44px; padding: 0; border: 1px solid color-mix(in srgb, var(--rk-muted) 28%, transparent); border-radius: 50%; background: transparent; color: var(--rk-ink); font-size: 20px; cursor: pointer; }
.rg-shelf-nav button:hover:not(:disabled) { background: var(--rk-accent); color: var(--rk-surface); }
.rg-shelf-nav button:disabled { opacity: .3; cursor: default; }
.rg-rail { position: relative; display: flex; align-items: center; gap: clamp(20px, 3vw, 44px); overflow-x: auto; overflow-y: hidden; padding: var(--rg-arc-space) var(--rg-gutter); scroll-padding-inline: var(--rg-gutter); scrollbar-width: none; overscroll-behavior-x: contain; scroll-snap-type: x proximity; cursor: grab; touch-action: auto; }
.rg-rail::-webkit-scrollbar { display: none; }
.rg-rail[data-dragging] { cursor: grabbing; scroll-snap-type: none; user-select: none; }
.rg-rail[data-dragging] a { cursor: grabbing; }
.rg-rail[data-fit='true'] { justify-content: center; }
.rg-artwork { position: relative; flex: 0 0 auto; width: calc(var(--rg-photo-height) * var(--rg-image-ratio)); min-width: 0; scroll-snap-align: center; transform: translateY(var(--rg-y, 0px)) rotate(var(--rg-rotate, 0deg)); transform-origin: center; }
.rg-image { display: block; position: relative; overflow: hidden; border-radius: 10px; background: color-mix(in srgb, var(--rk-muted) 10%, var(--rk-surface)); height: var(--rg-photo-height); }
.rg-image picture, .rg-image img { display: block; width: 100%; height: 100%; }
.rg-image img { object-fit: contain; transition: filter .25s ease-out; }
.rg-gif { position: absolute; top: 10px; left: 10px; padding: 2px 7px; border-radius: 4px; background: rgba(24,22,43,.8); color: #fff; font-size: 10px; font-weight: 600; letter-spacing: .04em; pointer-events: none; }
/* Captions stay with the artwork, leaving the two arcs room to breathe. */
.rg-caption { position: absolute; inset: auto 0 0; padding: 32px 12px 12px; border-radius: 0 0 10px 10px; color: #fff; background: linear-gradient(transparent, rgba(20,18,37,.9) 45%); pointer-events: none; }
.rg-caption h3 { padding-right: 28px; font-size: 13px; line-height: 1.5; }
.rg-details { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: 4px; line-height: 1.4; font-size: 10px; }
.rg-details span { color: var(--rk-line); }
.rg-caption a { display: inline-flex; align-items: center; justify-content: center; position: absolute; bottom: 8px; right: 0; width: 44px; height: 44px; color: #fff; font-size: 19px; pointer-events: auto; }
.rg-status { margin: 16px var(--rg-gutter) 0 !important; font-size: 13px; color: var(--rk-muted); }
.rg-signoff { margin: 32px var(--rg-gutter) 0; padding-top: 24px; border-top: 1px solid color-mix(in srgb, var(--rk-muted) 22%, transparent); }
.rg-signoff p { font-size: 15px; margin-bottom: 8px; }
.rg-signoff a { display: inline-flex; align-items: center; min-height: 44px; font-size: 14px; }
.rg-dialog { box-sizing: border-box; width: min(1200px, calc(100vw - 32px)); max-height: calc(100dvh - 32px); padding: 20px; border: 0; border-radius: 12px; background: var(--rk-surface); color: var(--rk-ink); overflow: auto; }
.rg-dialog::backdrop { background: rgba(12, 13, 28, .88); }
body:has(.rg-dialog[open]) { overflow: hidden; }
.rg-dialog-head { display: flex; justify-content: space-between; align-items: center; gap: 20px; margin-bottom: 16px; }
.rg-dialog-head > div { min-width: 0; }
.rg-dialog-head h2 { margin: 0; color: inherit; font-size: 20px; line-height: 1.5; }
.rg-dialog-head p { margin: 4px 0 0; color: var(--rk-muted); font-size: 13px; }
.rg-dialog .rg-full-image { display: block; width: 100%; height: min(65dvh, 760px); object-fit: contain; }
.rg-dialog-foot { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding-top: 16px; }
.rg-dialog :is(button, .rg-download) { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 8px 12px; border: 1px solid color-mix(in srgb, var(--rk-muted) 35%, transparent); border-radius: 8px; color: var(--rk-ink); background: transparent; cursor: pointer; font: inherit; font-size: 14px; white-space: nowrap; }
.rg-dialog button:disabled { opacity: .5; cursor: default; }
.rg-dialog .rg-download { background: var(--rk-accent); border-color: var(--rk-accent); color: var(--rk-surface); }
:is(.rikka-gallery, .rg-dialog, .rikka-gallery-entry) :is(a,button,.rg-rail):focus-visible { outline: 3px solid var(--rk-accent); outline-offset: 4px; }
@media (hover: hover) and (pointer: fine) {
  .rg-caption { opacity: 0; transition: opacity .2s ease-out; }
  .rg-artwork:is(:hover, :focus-within) .rg-caption { opacity: 1; }
  .rg-image:hover img { filter: brightness(1.06); }
}

/* A quiet change of pace after the latest articles, before the footer. */
#recent-posts > .rikka-gallery-entry { display: grid; grid-template-columns: 1fr 1fr; margin-top: 32px; overflow: hidden; background: var(--rk-surface); border-radius: 12px; color: var(--rk-ink); }
.rge-art { display: block; min-height: 220px; }
.rge-art img { display: block; width: 100%; height: 100%; object-fit: cover; }
.rge-copy { padding: clamp(24px, 3vw, 40px); align-self: center; }
.rge-copy h2 { margin: 0 0 12px; font-size: clamp(21px, 2vw, 28px); line-height: 1.5; color: var(--rk-ink); text-wrap: balance; }
.rge-copy p { margin: 0 0 18px; color: var(--rk-muted); line-height: 1.8; font-size: 14px; }
.rge-copy a { display: inline-flex; align-items: center; min-height: 44px; gap: 24px; color: var(--rk-accent); font-weight: 600; }
#article-container .rh-gallery-link { display: flex; align-items: center; gap: 18px; margin-top: 18px; padding: 12px; background: rgba(28,32,54,.85); border-radius: 10px; }
#article-container .rh-gallery-link img { width: 100px; height: 76px; margin: 0; object-fit: cover; object-position: right center; border-radius: 6px; }
.rh-gallery-link > span { min-width: 0; }
.rh-gallery-link strong { display: block; font-weight: 600; font-size: 15px; }
.rh-gallery-link small { display: block; margin-top: 4px; font-size: 12px; color: var(--rk-line); }
.rh-gallery-link b { margin-left: auto; padding-right: 8px; font-weight: 400; }
@media (max-width: 700px) {
  body:has(.rikka-gallery) #content-inner { padding: 16px 0 32px; }
  .rikka-gallery { --rg-gutter: 20px; }
  .rg-intro { display: block; }
  .rg-back { margin-bottom: 8px; }
  .rg-intro h1 { font-size: 30px; }
  .rg-intro > p { font-size: 14px; }
  .rg-toolbar { margin-top: 20px; padding-bottom: 16px; gap: 8px; }
  .rg-filters { flex-wrap: nowrap; width: 100%; gap: 0; justify-content: space-between; }
  .rg-filters button { padding-inline: 10px; font-size: 13px; }
  .rg-toolbar-meta { width: 100%; justify-content: space-between; }
  .rg-shelf { --rg-photo-height: clamp(148px, 42vw, 220px); --rg-arc-space: 32px; }
  .rg-rail { gap: 20px; }
  .rg-caption h3 { font-size: 12px; }
  .rg-details span { font-size: 10px; }
  .rg-shelf-head h2 { font-size: 14px; }
  .rg-status { max-width: 32ch; line-height: 1.8; }
  .rg-dialog { padding: 16px; }
  .rg-dialog-head h2 { font-size: 17px; }
  .rg-dialog-foot { display: grid; grid-template-columns: 44px minmax(0, 1fr) 44px; gap: 6px; }
  .rg-dialog-foot :is(a,button) { font-size: 12px; padding: 8px; }
  .rg-dialog-foot button { min-width: 0; font-size: 0; }
  .rg-dialog-foot button::before { content: '←'; font-size: 18px; }
  .rg-dialog-foot [data-rg-step='1']::before { content: '→'; }
  #recent-posts > .rikka-gallery-entry { grid-template-columns: 1fr; }
  .rge-art { min-height: 0; height: 210px; }
  #article-container .rh-gallery-link img { width: 76px; height: 68px; }
  .rh-gallery-link small { font-size: 11px; }
}
@media (prefers-reduced-motion: reduce) {
  .rg-artwork { transform: none; }
  .rg-image img, .rg-caption { transition: none; }
}

/* 分类指示块与图片一起移动，按钮位置和点击区域始终稳定。 */
.rikka-gallery[data-motion] .rg-filters { position: relative; isolation: isolate; }
.rikka-gallery[data-motion] .rg-filters::before {
  content: ''; position: absolute; z-index: -1; top: 0; bottom: 0; left: 0;
  width: var(--rg-tab-width); transform: translateX(var(--rg-tab-x));
  border-radius: 8px; background: var(--rk-accent); pointer-events: none;
}
.rikka-gallery[data-motion] .rg-filters button[aria-pressed='true'] { background: transparent; }

/* 原生 dialog 的顶层容纳飞行副本，避免被展架的 overflow 裁切。 */
.rg-dialog.rg-viewer {
  --rg-shade: .96;
  position: fixed; inset: 0; width: 100%; height: 100dvh; max-width: none; max-height: none;
  margin: 0; padding: 28px clamp(24px, 5vw, 80px); border-radius: 0;
  background: transparent; color: #f5f3ed; overflow: hidden;
}
.rg-viewer[open] { display: grid; grid-template-rows: auto minmax(0, 1fr) auto; gap: 16px; }
.rg-viewer::backdrop { background: rgba(13, 15, 19, var(--rg-shade)); }
.rg-viewer .rg-dialog-head { margin: 0; align-items: center; z-index: 2; }
.rg-viewer .rg-dialog-count { margin: 0 0 10px; color: #c5b68b; font-size: 11px; letter-spacing: .16em; font-variant-numeric: tabular-nums; }
.rg-viewer .rg-dialog-head h2 { color: #f5f3ed; font-size: 23px; font-weight: 500; }
.rg-viewer #rg-dialog-size { color: #a7a8ac; font-size: 11px; margin-top: 6px; }
.rg-viewer .rg-full-image { width: 100%; height: 100%; min-height: 0; border-radius: 4px; }
.rg-viewer .rg-dialog-foot { padding: 0; width: min(560px, 100%); margin: 0 auto; z-index: 2; }
.rg-viewer :is(button, .rg-download) { border-color: #53545a; color: #eeece5; border-radius: 999px; padding: 10px 22px; background: transparent; }
.rg-viewer :is(button, .rg-download):hover { border-color: #c5b68b; background: #ffffff0d; }
.rg-viewer .rg-download { border-color: #c5b68b; color: #e4d8b8; }
.rg-viewer .rg-close { border-color: transparent; }
.rg-viewer :is(a,button):focus-visible { outline-color: #e4d8b8; }
.rg-flight { position: fixed; top: 0; left: 0; max-width: none; max-height: none; margin: 0; object-fit: contain; pointer-events: none; z-index: 1; }
@media (max-width: 700px) {
  .rg-dialog.rg-viewer { padding: max(20px, env(safe-area-inset-top)) 16px max(20px, env(safe-area-inset-bottom)); gap: 14px; }
  .rg-viewer .rg-dialog-head { gap: 8px; }
  .rg-viewer .rg-dialog-head h2 { font-size: 18px; }
  .rg-viewer .rg-dialog-count { font-size: 10px; letter-spacing: .12em; }
  .rg-viewer .rg-close { padding: 8px 10px; }
  .rg-viewer .rg-dialog-foot { grid-template-columns: 48px minmax(0, 1fr) 48px; gap: 18px; }
  .rg-viewer .rg-dialog-foot :is(a,button) { padding: 10px; }
  .rg-viewer .rg-dialog-foot button { font-size: 0; }
}