/* ============================================================
   Lumen Gallery — 前台页面样式
   首页图集墙 / 图集详情 / 灯箱 / 404
   依赖 tokens.css，只补充页面级样式，不改动 tokens 变量与共享组件。
   ============================================================ */

/* ---------- 通用区块 ---------- */
.section{scroll-margin-top:calc(var(--header-h) + 12px)}
.stack{display:flex;flex-direction:column}

/* ---------- hero ---------- */
.hero{padding-top:clamp(56px,9vw,104px);padding-bottom:clamp(32px,4vw,44px)}
.hero > *{animation:heroIn var(--dur-slow) var(--ease-out) both}
.hero > *:nth-child(2){animation-delay:90ms}
.hero > *:nth-child(3){animation-delay:180ms}
.hero > *:nth-child(4){animation-delay:270ms}
.hero > *:nth-child(5){animation-delay:360ms}
@keyframes heroIn{from{opacity:0;transform:translateY(12px);filter:blur(6px)}}
.eyebrow{display:inline-flex;align-items:center;gap:9px;padding:5px 12px 5px 7px;border-radius:999px;border:var(--ring-w) solid var(--border);background:var(--card);box-shadow:var(--shadow-sm);font-size:13px;color:var(--muted)}
.eyebrow b{color:var(--fg);font-weight:500;font-variant-numeric:tabular-nums}
.dot{width:6px;height:6px;border-radius:50%;flex:none;background:#34d399;box-shadow:0 0 0 3px color-mix(in srgb,#34d399 22%,transparent);animation:pulse 2.6s var(--ease-out) infinite}
@keyframes pulse{50%{opacity:.45}}
.hero h1{margin:22px 0 0;font-size:clamp(38px,6.4vw,72px);line-height:1.02;letter-spacing:-.035em;font-weight:640;color:var(--fg-strong);max-width:16ch;overflow-wrap:anywhere}
.hero h1 em{font-style:normal;background:linear-gradient(100deg,#8b7dff,#22d3ee 70%);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{margin:20px 0 0;max-width:52ch;color:var(--muted);font-size:clamp(15px,1.6vw,16.5px);white-space:pre-line;overflow-wrap:anywhere}
.hero-actions{margin-top:30px;display:flex;flex-wrap:wrap;gap:10px}
.stats{margin-top:46px;display:flex;flex-wrap:wrap;align-items:flex-end;gap:26px 46px;padding-top:26px;border-top:1px solid var(--border-soft)}
.stat b{display:block;font-size:22px;line-height:1.15;letter-spacing:-.02em;color:var(--fg-strong);font-variant-numeric:tabular-nums}
.stat-meta{margin-left:auto;text-align:right;line-height:1.35}
.stat-meta .mono{color:var(--muted-strong)}

/* ---------- toolbar ---------- */
.toolbar{position:sticky;top:var(--header-h);z-index:50;display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:14px 0;margin-bottom:8px;transition:background var(--dur) var(--ease-out),border-color var(--dur)}
.toolbar.stuck{background:color-mix(in srgb,var(--bg) 80%,transparent);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom:1px solid var(--border-soft)}
.toolbar-spacer{flex:1}
.chips.sort-chips{padding:4px}
.chips.sort-chips .chip{padding:6px 12px;font-size:13px}
.toolbar .field input{width:min(200px,30vw)}

/* ---------- 图集墙 ---------- */
.album-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(232px,1fr));gap:18px;padding-bottom:40px}
.album-card{position:relative;display:flex;flex-direction:column;padding:0;border-radius:var(--radius-xl);overflow:hidden;border:var(--ring-w) solid var(--border-soft);background:var(--card);box-shadow:var(--shadow-sm);text-align:left;cursor:pointer;transform:translateZ(0);transition:border-color 200ms var(--ease-out),box-shadow 200ms var(--ease-out),transform 200ms var(--ease-out)}
.album-card::after{content:"";position:absolute;inset:0;border-radius:inherit;opacity:0;transition:opacity var(--dur);pointer-events:none;z-index:1;background:radial-gradient(420px 220px at 50% 0%,color-mix(in srgb,var(--accent) 14%,transparent),transparent 62%)}
@media (hover:hover) and (pointer:fine){
  .album-card:hover{border-color:var(--border);box-shadow:var(--shadow-md);transform:translateY(-3px)}
  .album-card:hover .ac-media img{transform:scale(1.045)}
  .album-card:hover::after{opacity:1}
}
.album-card:active{transform:translateY(-1px) scale(.995)}
.ac-media{position:relative;aspect-ratio:4/5;overflow:hidden;background:var(--skeleton)}
.ac-media img{width:100%;height:100%;object-fit:cover;transition:transform 300ms var(--ease-out)}
.ac-count{position:absolute;top:10px;right:10px;z-index:2;display:inline-flex;align-items:center;gap:5px;padding:4px 9px;border-radius:999px;font-size:11.5px;font-family:var(--font-mono);letter-spacing:.04em;color:#fff;background:rgba(10,10,12,.55);border:1px solid rgba(255,255,255,.2);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);font-variant-numeric:tabular-nums}
.ac-count svg{width:12px;height:12px}
/* 「私密」角标：仅站长可见的图集 */
.ac-flag{position:absolute;top:10px;left:10px;z-index:2;display:inline-flex;align-items:center;gap:5px;padding:4px 10px;border-radius:999px;font-size:11.5px;font-weight:500;letter-spacing:.02em;color:#fff;background:linear-gradient(120deg,#8b7dff,#5a4bef);box-shadow:0 8px 20px -10px var(--glow-1),inset 0 1px 0 rgba(255,255,255,.28)}
.ac-flag svg{width:12px;height:12px}
.flag{display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:999px;font-size:12.5px;font-weight:500;color:#fff;background:linear-gradient(120deg,#8b7dff,#5a4bef);box-shadow:0 8px 20px -12px var(--glow-1),inset 0 1px 0 rgba(255,255,255,.28);vertical-align:middle;margin-left:12px;white-space:nowrap}
.flag svg{width:13px;height:13px}
.album-title-row{display:flex;align-items:center;flex-wrap:wrap;gap:10px}
.album-title-row h1{margin:0}
.album-title-row .flag{margin-left:0}
.ac-body{padding:13px 15px 15px;display:flex;flex-direction:column;gap:5px;min-width:0}
.ac-title{margin:0;font-size:15px;font-weight:550;letter-spacing:-.01em;color:var(--fg-strong);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;overflow-wrap:anywhere}
.ac-author{display:flex;align-items:center;gap:7px;min-width:0;font-size:13px;color:var(--muted)}
.ac-author .who{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ac-tags{display:flex;gap:5px;flex-wrap:wrap;margin-top:2px}
.ac-tags .tag{font-size:11.5px}

/* 图片加载失败降级：渐变底 + 图标占位 */
.ph{display:none;position:absolute;inset:0;place-items:center;color:var(--muted);background:linear-gradient(140deg,color-mix(in srgb,var(--accent) 16%,transparent),color-mix(in srgb,#22d3ee 12%,transparent)),var(--skeleton)}
.ph svg{width:26px;height:26px}
.media.failed .ph,.shot.failed .ph,.ac-media.failed .ph{display:grid}
.media.failed img,.shot.failed img,.ac-media.failed img{display:none}
.shot.failed{aspect-ratio:3/4}

/* ---------- 骨架屏 ---------- */
.sk-card{aspect-ratio:4/5;border-radius:var(--radius-xl)}
.sk-line{height:12px;border-radius:6px;margin-top:10px}

/* ---------- 标签 ---------- */
.tags{display:flex;flex-wrap:wrap;gap:7px}
.tag{display:inline-flex;align-items:center;padding:4px 11px;border-radius:999px;border:var(--ring-w) solid var(--border);background:var(--card);font-size:12.5px;color:var(--muted-strong);white-space:nowrap;max-width:100%;overflow:hidden;text-overflow:ellipsis;transition:color var(--dur-fast),border-color var(--dur-fast)}
a.tag:hover{color:var(--fg);border-color:var(--border)}

/* ---------- 图集详情 ---------- */
.page{padding-top:clamp(22px,3.4vw,38px)}
.crumbs{display:flex;align-items:center;gap:8px;margin-bottom:20px;flex-wrap:wrap}
.back-link{display:inline-flex;align-items:center;gap:7px;height:34px;padding:0 13px;border-radius:10px;border:var(--ring-w) solid var(--border);background:var(--card);box-shadow:var(--shadow-sm);font-size:13.5px;color:var(--muted);transition:color var(--dur-fast),background var(--dur-fast),transform var(--dur-fast) var(--ease-spring)}
@media (hover:hover) and (pointer:fine){ .back-link:hover{color:var(--fg);background:var(--card-hover)} }
.back-link:active{transform:scale(.97)}
.back-link svg{width:15px;height:15px}
.crumbs .sep{color:var(--muted);font-size:12px;min-width:0;overflow-wrap:anywhere}

.album-head{padding-bottom:clamp(22px,3vw,32px);border-bottom:1px solid var(--border-soft);margin-bottom:clamp(20px,2.6vw,28px)}
.album-head h1{margin:0;font-size:clamp(28px,4.4vw,46px);line-height:1.08;letter-spacing:-.03em;font-weight:640;color:var(--fg-strong);overflow-wrap:anywhere}
.album-by{margin:14px 0 0;display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:14px;color:var(--muted)}
.album-by .who{color:var(--fg);font-weight:500}
.album-by .dotsep{width:3px;height:3px;border-radius:50%;background:var(--muted);opacity:.6}
.album-meta{margin-top:18px;display:flex;flex-wrap:wrap;gap:10px 28px;padding-top:16px;border-top:1px dashed var(--border-soft)}
.album-meta .m b{display:block;font-size:16px;color:var(--fg-strong);letter-spacing:-.01em;font-variant-numeric:tabular-nums}
.album-desc{margin:20px 0 0;max-width:70ch;color:var(--muted);font-size:14.5px;white-space:pre-line;overflow-wrap:anywhere}
.album-head .tags{margin-top:18px}

/* ---------- 瀑布流（CSS columns，无 JS 测高） ---------- */
.masonry{column-count:4;column-gap:18px;padding-bottom:40px}
.shot{position:relative;display:block;width:100%;margin:0 0 18px;padding:0;border-radius:var(--radius-lg);overflow:hidden;border:var(--ring-w) solid var(--border-soft);background:var(--skeleton);box-shadow:var(--shadow-sm);cursor:zoom-in;break-inside:avoid;-webkit-column-break-inside:avoid;page-break-inside:avoid;transform:translateZ(0);transition:border-color 200ms var(--ease-out),box-shadow 200ms var(--ease-out),transform 200ms var(--ease-out)}
.shot img{width:100%;height:auto;min-height:80px;transition:transform 300ms var(--ease-out),opacity var(--dur)}
.shot .num{position:absolute;left:10px;bottom:10px;z-index:2;padding:3px 9px;border-radius:999px;font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:#fff;background:rgba(10,10,12,.5);border:1px solid rgba(255,255,255,.18);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);opacity:0;transform:translateY(6px);transition:opacity var(--dur) var(--ease-out),transform var(--dur) var(--ease-out);font-variant-numeric:tabular-nums}
@media (hover:hover) and (pointer:fine){
  .shot:hover{border-color:var(--border);box-shadow:var(--shadow-md);transform:translateY(-3px)}
  .shot:hover img{transform:scale(1.03)}
  .shot:hover .num,.shot:focus-visible .num{opacity:1;transform:none}
}
.shot:focus-visible .num{opacity:1;transform:none}

/* ---------- 灯箱补充（结构与基础样式来自 tokens.css） ---------- */
.lb-img.dragging{transition:none}
.lb-bar .row .who{color:rgba(255,255,255,.92)}
.lb-fail{color:#fff;font-size:14px;text-align:center;padding:0 20px}
.lb-bar .meta{flex:1}

/* ---------- 关于 / 页脚 ---------- */
.about{padding:clamp(30px,4vw,52px) 0 6px}
.about h2{margin:0 0 10px;font-size:clamp(19px,2.2vw,24px);letter-spacing:-.02em;color:var(--fg-strong)}
.about p{margin:0;max-width:66ch;color:var(--muted);font-size:14.5px;white-space:pre-line;overflow-wrap:anywhere}
.footer-note{color:var(--muted)}

/* ---------- 404 ---------- */
.err-page{min-height:calc(100vh - var(--header-h) - 120px);display:grid;place-items:center;padding:clamp(40px,9vw,90px) 0}
.err-page .empty{max-width:520px;width:100%}
.err-page .empty .actions{margin-top:20px;display:flex;gap:10px;justify-content:center;flex-wrap:wrap}

/* ---------- 手机 ---------- */
@media (max-width:1180px){ .masonry{column-count:3} }
@media (max-width:860px){
  .masonry{column-count:2}
  .stats{gap:22px 30px}
  .album-grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr))}
}
@media (max-width:640px){
  .hero{padding-top:clamp(36px,8vw,56px);padding-bottom:28px}
  .hero h1{font-size:clamp(30px,8.4vw,40px);margin-top:18px}
  .hero p{margin-top:16px;font-size:15px}
  .hero-actions{margin-top:22px;gap:8px}
  .stats{margin-top:32px;gap:18px 24px;padding-top:20px}
  .stat b{font-size:19px}
  .stat-meta{margin-left:0;text-align:left;width:100%}
  .toolbar{gap:10px;padding:12px 0}
  .toolbar-spacer{display:none}
  .chips{width:100%;flex-wrap:nowrap;overflow-x:auto;justify-content:flex-start;scrollbar-width:none;-ms-overflow-style:none;scroll-snap-type:x proximity}
  .chips::-webkit-scrollbar{display:none}
  .chip{flex:none;scroll-snap-align:start}
  /* 手机上把排序 chips 压到与搜索框同一行，工具栏只占两行 */
  .toolbar .field{flex:1 1 120px;width:auto;min-width:0}
  .toolbar .field input{width:100%}
  .sort-chips{width:auto;flex:0 1 auto;max-width:56%}
  .album-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
  .album-card{border-radius:18px}
  .ac-body{padding:11px 12px 13px}
  .ac-title{font-size:14px}
  .masonry{column-count:2;column-gap:12px}
  .shot{margin-bottom:12px;border-radius:16px}
  .album-meta{gap:10px 20px}
  .lb-bar{flex-wrap:wrap;gap:9px;padding:10px 12px;justify-content:center;bottom:calc(14px + env(safe-area-inset-bottom))}
  .lb-bar .meta{flex:1 1 100%;text-align:center}
  .lb-bar h3{max-width:none;font-size:14px}
  .lb-bar .row{justify-content:center}
  .lb-count{border-left:0;padding-left:0}
  .lb-actions{display:flex;border-left:0;padding-left:0}
  .lb-nav{width:40px;height:40px}
  .err-page{min-height:calc(100vh - var(--header-h) - 80px)}
}
@media (max-width:420px){
  .chips{-webkit-mask-image:linear-gradient(90deg,#000 calc(100% - 28px),transparent);mask-image:linear-gradient(90deg,#000 calc(100% - 28px),transparent)}
  .ac-count{padding:3px 7px;font-size:11px}
}

@media (prefers-reduced-motion:reduce){
  .album-card:hover,.shot:hover{transform:none}
  .album-card:hover .ac-media img,.shot:hover img{transform:none}
}