/* Voidsalt Slides — 杂志风导航页（墨水经典）
   设计语言与 deck 一致：衬线大标题 + 非衬线正文 + 等宽元数据，
   无阴影 / 无渐变 / 无圆角，层级靠字号、字体与 hairline。 */

:root{
  --ink:#0a0a0b;
  --ink-rgb:10,10,11;
  --paper:#f1efea;
  --paper-rgb:241,239,234;
  --paper-tint:#e8e5de;
  --ink-tint:#18181a;

  --mono:"IBM Plex Mono",ui-monospace,monospace;
  --serif-en:"Playfair Display",Georgia,serif;
  --serif-zh:"Noto Serif SC",source-han-serif-sc,serif;
  --sans-zh:"Noto Sans SC",source-han-sans-sc,sans-serif;

  --hairline:1px solid rgba(var(--ink-rgb),.18);
  --gutter:clamp(20px,5vw,72px);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans-zh);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  transition:background .4s ease,color .4s ease;
}

/* ============ 暗色主题（墨色夜读） ============ */
[data-theme="dark"]{
  --ink:#ece9e2;
  --ink-rgb:236,233,226;
  --paper:#17171c;
  --paper-rgb:23,23,28;
  --paper-tint:#212128;
  --ink-tint:#f3f1ec;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme]){
    --ink:#ece9e2;--ink-rgb:236,233,226;
    --paper:#17171c;--paper-rgb:23,23,28;
    --paper-tint:#212128;--ink-tint:#f3f1ec;
  }
}
a{color:inherit;text-decoration:none}
::selection{background:var(--ink);color:var(--paper)}

/* ============ Chrome 条 ============ */
.chrome{
  display:flex;justify-content:space-between;align-items:center;
  padding:18px var(--gutter);
  font-family:var(--mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;
  border-bottom:var(--hairline);
}
.chrome .left,.chrome .right{display:flex;gap:1.8em;align-items:center;opacity:.72}
.sep{display:inline-block;width:36px;height:1px;background:currentColor;opacity:.4}

/* ============ 刊头 ============ */
.masthead{
  position:relative;overflow:hidden;
  padding:clamp(48px,9vh,110px) var(--gutter) clamp(36px,6vh,72px);
  border-bottom:var(--hairline);
}
.ghost{
  position:absolute;top:-.08em;right:-.04em;z-index:0;
  font-family:var(--serif-en);font-weight:900;font-size:clamp(180px,30vw,460px);
  line-height:.8;letter-spacing:-.04em;opacity:.05;pointer-events:none;user-select:none;
}
.kicker{
  font-family:var(--mono);font-size:12px;letter-spacing:.3em;text-transform:uppercase;
  opacity:.6;margin-bottom:2.4vh;position:relative;z-index:1;
}
.masthead-title{position:relative;z-index:1;display:flex;align-items:baseline;gap:.35em;flex-wrap:wrap}
.masthead-title .en{
  font-family:var(--serif-en);font-weight:800;font-size:clamp(64px,9.5vw,150px);
  line-height:.95;letter-spacing:-.025em;
}
.masthead-title .zh{
  font-family:var(--serif-zh);font-weight:600;font-size:clamp(20px,2.4vw,36px);
  letter-spacing:.06em;opacity:.85;
}
.masthead-lead{
  position:relative;z-index:1;max-width:34em;margin-top:3vh;
  font-size:max(15px,1.1vw);line-height:1.8;opacity:.78;
}
.masthead-meta{
  position:relative;z-index:1;display:flex;gap:1.6em;align-items:center;margin-top:4vh;
  font-family:var(--mono);font-size:12px;letter-spacing:.2em;text-transform:uppercase;opacity:.6;
}

/* ============ 检索区 ============ */
.controls{
  display:flex;gap:3vw;align-items:flex-end;flex-wrap:wrap;
  padding:26px var(--gutter);
  border-bottom:var(--hairline);
}
.search{display:flex;align-items:baseline;gap:1em;flex:1 1 320px;border-bottom:var(--hairline);padding-bottom:10px}
.search-label{font-family:var(--mono);font-size:11px;letter-spacing:.24em;opacity:.55;white-space:nowrap}
.search input{
  flex:1;border:0;outline:0;background:transparent;color:var(--ink);
  font-family:var(--serif-zh);font-size:clamp(17px,1.4vw,22px);font-weight:500;
}
.search input::placeholder{color:rgba(var(--ink-rgb),.32);font-weight:400}
.search input::-webkit-search-cancel-button{-webkit-appearance:none}
.tags{display:flex;gap:8px;flex-wrap:wrap}
.tag-btn{
  font-family:var(--mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;
  padding:7px 14px;border:1px solid rgba(var(--ink-rgb),.3);background:transparent;color:var(--ink);
  cursor:pointer;transition:background .25s ease,color .25s ease,border-color .25s ease;
}
.tag-btn:hover{border-color:var(--ink)}
.tag-btn.active{background:var(--ink);color:var(--paper);border-color:var(--ink)}
/* 「更多标签」折叠切换：默认（桌面）隐藏，仅移动端出现 */
.tags-more{
  display:none;align-items:center;gap:.5em;margin-top:10px;
  font-family:var(--mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;
  padding:7px 14px;border:1px dashed rgba(var(--ink-rgb),.35);background:transparent;color:var(--ink);
  cursor:pointer;transition:border-color .25s ease}
.tags-more:hover{border-color:var(--ink)}

/* ============ 目录 ============ */
.catalog{
  display:grid;grid-template-columns:repeat(3,1fr);
  column-gap:clamp(32px,3.5vw,56px);row-gap:0;
  padding:0 var(--gutter) clamp(48px,8vh,96px);
}
.card{
  display:flex;flex-direction:column;
  border-bottom:var(--hairline);
  padding:30px 0;
  position:relative;
}
.card.featured{
  grid-column:1 / -1;
  display:grid;grid-template-columns:7fr 5fr;gap:clamp(24px,4vw,56px);align-items:center;
  padding-top:clamp(28px,5vh,52px);padding-bottom:clamp(28px,5vh,52px);
}
.cover{
  display:block;position:relative;overflow:hidden;
  border:var(--hairline);
  aspect-ratio:16/9;background:var(--paper-tint);
}
.cover img{
  width:100%;height:100%;object-fit:cover;display:block;
  transition:transform .8s cubic-bezier(.22,1,.36,1),opacity .6s ease;
}
.card:hover .cover img{transform:scale(1.025)}
.cover .play-hint{
  position:absolute;right:0;bottom:0;
  font-family:var(--mono);font-size:10px;letter-spacing:.26em;text-transform:uppercase;
  background:var(--ink);color:var(--paper);padding:7px 12px;
  opacity:0;transform:translateY(4px);transition:opacity .3s ease,transform .3s ease;
}
.card:hover .play-hint{opacity:1;transform:none}

.card-body{display:flex;flex-direction:column;flex:1}

.card-no{
  font-family:var(--mono);font-size:11px;letter-spacing:.26em;text-transform:uppercase;
  opacity:.5;margin:18px 0 10px;display:flex;justify-content:space-between;gap:1em;
  transition:opacity .3s ease;
}
.card:hover .card-no{opacity:.85}
.card-title{
  font-family:var(--serif-zh);font-weight:700;
  font-size:clamp(20px,1.7vw,26px);line-height:1.25;letter-spacing:-.005em;
}
.card-title a::after{content:"";position:absolute;inset:0}
.card-sub{
  font-family:var(--serif-zh);font-weight:400;font-size:max(13px,.95vw);
  opacity:.62;margin-top:6px;
}
.card-desc{
  font-size:max(13.5px,.92vw);line-height:1.75;opacity:.7;margin-top:12px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{
  margin-top:auto;padding-top:18px;
  font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;opacity:.55;
  display:flex;gap:.6em;flex-wrap:wrap;
}
.card-meta .dot::before{content:"·";margin-right:.6em}

.card.featured .card-no{margin-top:0}
.card.featured .card-title{font-size:clamp(30px,3.4vw,52px);line-height:1.15}
.card.featured .card-sub{font-size:max(15px,1.15vw);margin-top:10px}
.card.featured .card-desc{-webkit-line-clamp:3;max-width:30em;margin-top:16px}
.card.featured .card-meta{margin-top:24px}
.featured-flag{
  display:inline-block;font-family:var(--mono);font-size:10px;letter-spacing:.26em;text-transform:uppercase;
  border:1px solid currentColor;padding:5px 12px;opacity:.8;margin-bottom:18px;
}

/* hidden deck（涉密/私享）：默认隐藏，按 H 显示后用虚线框 + HIDDEN 角标标识，与公开卡区分 */
.card.is-hidden{outline:1px dashed color-mix(in srgb, currentColor 35%, transparent);outline-offset:6px}
.hidden-flag{
  display:inline-block;font-family:var(--mono);font-size:10px;letter-spacing:.26em;text-transform:uppercase;
  border:1px solid currentColor;padding:4px 10px;margin-bottom:12px;opacity:.7;border-radius:2px;
}

.empty{
  padding:10vh var(--gutter);text-align:center;
  font-family:var(--serif-zh);font-size:clamp(17px,1.5vw,24px);opacity:.55;
}

/* ============ Footer ============ */
.foot{
  display:flex;justify-content:space-between;align-items:baseline;gap:2em;flex-wrap:wrap;
  padding:22px var(--gutter) 30px;border-top:var(--hairline);
  font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;opacity:.55;
}
.foot .title{font-family:var(--serif-zh);font-size:13px;letter-spacing:.05em;text-transform:none;opacity:.8}
.foot kbd{
  font-family:var(--mono);font-size:10px;border:1px solid rgba(var(--ink-rgb),.35);
  padding:1px 6px;margin:0 2px;
}

/* ============ Skip link / 可访问性 ============ */
.skip-link{
  position:absolute;left:-999px;top:0;z-index:100;
  background:var(--ink);color:var(--paper);
  font-family:var(--mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  padding:10px 16px;
}
.skip-link:focus{left:0}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px}
.catalog:focus{outline:none}

/* ============ 主题切换按钮 ============ */
.theme-toggle{
  display:inline-flex;align-items:center;gap:.7em;
  font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:inherit;background:transparent;border:0;cursor:pointer;padding:0;opacity:.72;
  transition:opacity .25s ease;
}
.theme-toggle:hover{opacity:1}
.theme-dot{
  width:11px;height:11px;border-radius:50%;
  border:1px solid currentColor;
  background:linear-gradient(135deg,currentColor 0 50%,transparent 50% 100%);
}

/* ============ 顶部「PALETTE」按钮 ============ */
.chrome-btn{
  display:inline-flex;align-items:center;gap:.7em;
  font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:inherit;background:transparent;border:0;cursor:pointer;padding:0;opacity:.72;
  transition:opacity .25s ease;
}
.chrome-btn:hover{opacity:1}
.pal-ico{display:grid;grid-template-columns:repeat(2,1fr);gap:2px;width:12px;height:12px}
.pal-ico i{border-radius:1px;display:block}
.pal-ico i:nth-child(1){background:#b06456}
.pal-ico i:nth-child(2){background:#0f766e}
.pal-ico i:nth-child(3){background:#c69a4a}
.pal-ico i:nth-child(4){background:#2a3048}

/* ============ 主题色清单弹层 ============ */
#palette-overlay{
  position:fixed;inset:0;z-index:120;display:flex;align-items:flex-start;justify-content:center;
  padding:6vh 4vw;overflow-y:auto;
  background:rgba(0,0,0,.5);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
}
#palette-overlay[hidden]{display:none}
#palette-panel{
  position:relative;width:100%;max-width:940px;
  background:var(--paper);border:var(--hairline);border-radius:14px;
  box-shadow:0 30px 80px rgba(0,0,0,.32);padding:38px 40px 44px;
}
.pal-close{
  position:absolute;top:20px;right:22px;width:32px;height:32px;border-radius:50%;
  border:var(--hairline);background:transparent;color:var(--ink);cursor:pointer;
  font-size:13px;line-height:1;opacity:.6;transition:opacity .2s,background .2s;
}
.pal-close:hover{opacity:1;background:rgba(var(--ink-rgb),.06)}
.pal-head h2{font-family:var(--serif-zh);font-weight:700;font-size:clamp(22px,2.4vw,30px);letter-spacing:.01em}
.pal-head p{font-family:var(--sans-zh);font-weight:300;font-size:14px;line-height:1.7;opacity:.7;margin-top:8px;max-width:64ch}
.pal-head code{font-family:var(--mono);font-size:.92em;background:rgba(var(--ink-rgb),.07);padding:1px 5px;border-radius:4px}
.pal-group{
  font-family:var(--mono);font-size:11px;letter-spacing:.24em;text-transform:uppercase;opacity:.5;
  margin:30px 0 14px;padding-bottom:8px;border-bottom:var(--hairline);
}
.pal-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.pal-card{
  display:flex;flex-direction:column;gap:2px;text-align:left;
  background:transparent;border:0;padding:0;cursor:pointer;font:inherit;color:inherit;
}
.pal-sw{
  position:relative;height:74px;border-radius:9px;overflow:hidden;margin-bottom:9px;
  border:var(--hairline);transition:transform .2s ease;
}
.pal-card:hover .pal-sw{transform:translateY(-2px)}
.pal-acc{position:absolute;left:0;right:0;bottom:0;height:30%}
.pal-card.copied .pal-sw::after{
  content:"已复制";position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:#fff;background:rgba(0,0,0,.45);
}
.pal-cn{font-family:var(--serif-zh);font-weight:500;font-size:16px}
.pal-en{font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;opacity:.62;text-transform:uppercase}
.pal-en code{font-size:1em;opacity:1}
.pal-from{font-family:var(--sans-zh);font-weight:300;font-size:11.5px;opacity:.5;margin-top:1px}
@media (max-width:860px){.pal-grid{grid-template-columns:repeat(3,1fr)}}
@media (max-width:560px){.pal-grid{grid-template-columns:repeat(2,1fr)}#palette-panel{padding:30px 22px 32px}}

/* ============ 卡片：复制链接 ============ */
.card-actions{
  display:flex;gap:1.2em;align-items:center;margin-top:14px;
}
.copy-link{
  font-family:var(--mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;
  color:inherit;background:transparent;border:0;cursor:pointer;padding:0;
  opacity:0;transform:translateY(3px);
  transition:opacity .3s ease,transform .3s ease;
  border-bottom:1px solid transparent;
}
.card:hover .copy-link,.copy-link:focus-visible{opacity:.62;transform:none}
.copy-link:hover{opacity:1;border-bottom-color:currentColor}
.copy-link.copied{opacity:1;border-bottom-color:currentColor}
.card.featured .card-actions{margin-top:20px}

/* ============ <noscript> 兜底目录 ============ */
.noscript-list{
  list-style:none;padding:clamp(20px,5vw,72px);display:grid;gap:14px;
  font-family:var(--serif-zh);font-size:18px;
}
.noscript-list a{border-bottom:var(--hairline);padding-bottom:8px;display:block}

/* ============ 跨文档视图转场（渐进增强） ============ */
@view-transition{navigation:auto}

/* ============ 响应式 ============ */
@media (max-width:1080px){
  .catalog{grid-template-columns:repeat(2,1fr)}
  .card.featured{grid-template-columns:1fr;gap:0}
  .card.featured .cover{order:-1;margin-bottom:22px}
}
@media (max-width:680px){
  .catalog{grid-template-columns:1fr}
  .masthead-title .zh{font-size:18px}
  /* 顶栏精简，杜绝右侧溢出：去掉「— index」，两个按钮只留图标 */
  .chrome .left .sep, .chrome .left span:last-child{display:none}
  .chrome .right .sep{display:none}
  .chrome-btn span:not(.pal-ico), .theme-label{display:none}
  .chrome .right{gap:1.4em}
  /* 标签太多铺满首屏 → 默认只显示前 9 个，其余折叠，点「更多」展开 */
  .tags:not(.tags-expanded) .tag-btn:nth-child(n+10){display:none}
  .tags-more{display:inline-flex}
}

/* ============ 减少动效偏好 ============ */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  ::view-transition-group(*),::view-transition-old(*),::view-transition-new(*){animation:none!important}
}