/* Paper Studio · CIE past papers: header navigation, catalogue grid, reader.
   Built on --dash-* tokens so light and dark themes both work. */

/* ---- visitor header navigation ------------------------------------------- */
.pp-topnav{display:flex;align-items:center;gap:2px;margin-left:28px;margin-right:auto}
.pp-topnav-item{display:inline-flex;align-items:center;gap:4px;min-height:36px;padding:0 12px;border:0;border-radius:9px;background:transparent;color:var(--dash-muted);font:inherit;font-size:14px;font-weight:600;text-decoration:none;cursor:pointer}
.pp-topnav-item:hover,.pp-topnav-item:focus-visible{background:var(--dash-bg-3);color:var(--dash-ink)}
.pp-topnav-item.is-on{color:var(--dash-ink)}
.pp-topnav-item svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.pp-topnav-drop{position:relative}
.pp-menu{position:absolute;top:100%;left:0;z-index:60;display:none;padding-top:8px}
.pp-topnav-drop:hover .pp-menu,.pp-topnav-drop:focus-within .pp-menu{display:block}
.pp-topnav-drop.is-hushed .pp-menu{display:none}
.pp-menu-cols{display:grid;grid-template-columns:repeat(2,minmax(210px,1fr));gap:4px 18px;padding:14px 16px;border:1px solid var(--dash-line);border-radius:14px;background:var(--dash-bg);box-shadow:0 16px 38px rgba(0,0,0,.12)}
.pp-menu-col{display:grid;align-content:start;gap:1px}
.pp-menu-col strong{margin:0 0 6px;font-size:11.5px;font-weight:700;letter-spacing:.02em;color:var(--dash-muted)}
.pp-menu-col button{padding:6px 8px;border:0;border-radius:8px;background:transparent;color:var(--dash-ink);font:inherit;font-size:13.5px;text-align:left;cursor:pointer;white-space:nowrap}
.pp-menu-col button:hover,.pp-menu-col button:focus-visible{background:var(--dash-accent-soft);color:var(--dash-accent)}
/* Narrow/phone: topnav is only 首页 + 真题库 text links now (dropdown removed).
   Keep them visible and scrollable; do not hide the <a> items. */
@media (max-width:860px){
  .pp-topnav{margin-left:8px;gap:0;flex:1 1 auto;min-width:0;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
  .pp-topnav::-webkit-scrollbar{display:none}
  .pp-topnav-item{padding:0 8px;font-size:13px;flex:none}
  .pp-topnav-drop .pp-menu{display:none!important}
}
@media (max-width:640px){
  .pp-topnav{margin-left:4px}
  .pp-topnav-item{padding:0 7px;font-size:12.5px;min-height:34px}
  .pp-topnav-item svg{display:none}
  /* Guest phone chrome: keep 首页/真题库 beside brand; push 登录/注册 to next row. */
  .dash-frame--guest > .dash-topbar{flex-wrap:wrap;row-gap:8px}
  .dash-frame--guest > .dash-topbar .dash-brand-title{font-size:.92rem}
  .dash-frame--guest > .dash-topbar .dash-topbar-actions{width:100%;margin-left:0;justify-content:flex-end}
}

/* ---- catalogue page -------------------------------------------------------- */
.pp-page{max-width:1280px}
.pp-hero{margin:4px 0 18px}
.pp-hero h1{margin:0;font-size:26px;letter-spacing:-.02em}
.pp-hero p{margin:6px 0 0;color:var(--dash-muted);font-size:14px}
.pp-quals{margin:0 0 12px}
.pp-subjects{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 16px}
.pp-subject{min-height:36px;padding:0 14px;border:1px solid var(--dash-line-strong);border-radius:999px;background:var(--dash-bg);color:var(--dash-ink);font:inherit;font-size:13.5px;cursor:pointer}
.pp-subject:hover{border-color:var(--dash-accent)}
.pp-subject.is-on{border-color:transparent;background:var(--dash-accent);color:var(--dash-accent-ink,#fff)}
.pp-grid-panel{border:1px solid var(--dash-line);border-radius:16px;background:var(--dash-bg-2);overflow:hidden}
.pp-grid-meta{padding:10px 16px;border-bottom:1px solid var(--dash-line);font-size:12.5px;color:var(--dash-muted);font-variant-numeric:tabular-nums}
.pp-grid-scroll{overflow:auto;max-height:calc(100vh - 230px)}
.pp-grid{width:100%;border-collapse:separate;border-spacing:0;font-size:13px}
.pp-grid thead th{position:sticky;top:0;z-index:1;padding:10px 12px;background:var(--dash-bg-2);border-bottom:1px solid var(--dash-line-strong);text-align:left;vertical-align:bottom}
.pp-grid thead th span{display:block;font-weight:700}
.pp-grid thead th small{display:block;max-width:190px;font-size:11px;font-weight:500;color:var(--dash-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pp-grid tbody th{padding:8px 12px 8px 16px;text-align:left;white-space:nowrap;font-weight:400}
.pp-grid tbody th b{display:block;font-variant-numeric:tabular-nums}
.pp-grid tbody th small{font-size:11.5px;color:var(--dash-muted)}
.pp-grid tbody td{padding:6px 10px;border-top:1px solid var(--dash-line);vertical-align:middle}
.pp-grid tbody th{border-top:1px solid var(--dash-line)}
.pp-grid tbody tr:hover>*{background:color-mix(in srgb,var(--dash-accent) 5%,transparent)}
.pp-variant{min-width:38px;min-height:30px;margin:2px;padding:0 8px;border:1px solid var(--dash-line-strong);border-radius:8px;background:var(--dash-bg);color:var(--dash-ink);font:inherit;font-size:12.5px;font-weight:600;font-variant-numeric:tabular-nums;cursor:pointer}
.pp-variant:hover,.pp-variant:focus-visible{border-color:var(--dash-accent);background:var(--dash-accent-soft);color:var(--dash-accent)}

/* ---- paper reader ----------------------------------------------------------- */
.pp-reader{position:fixed;inset:0;z-index:1000;display:grid;grid-template-rows:auto minmax(0,1fr);background:var(--dash-bg-3,#e9eaee)}
.pp-reader-bar{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;padding:10px 18px;border-bottom:1px solid var(--dash-line);background:var(--dash-bg)}
.pp-reader-bar strong{font-size:15px;font-variant-numeric:tabular-nums}
.pp-reader-bar small{color:var(--dash-muted);font-size:12.5px}
.pp-download{display:inline-flex;align-items:center;min-height:34px;padding:0 12px;text-decoration:none}
.pp-reader-tools{display:inline-flex;gap:6px;margin-left:auto}
.pp-reader-tools button{min-height:34px}
.pp-reader-body{overflow:auto;padding:18px}
.pp-reader-pages{display:grid;justify-items:center;gap:16px}
.pp-reader-pages figure{margin:0;width:min(calc(860px * var(--pp-zoom,1)),calc(100% * var(--pp-zoom,1)))}
.pp-reader-pages img{display:block;width:100%;height:auto;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.08),0 10px 28px rgba(0,0,0,.08)}
.pp-reader-pages figcaption{margin-top:6px;text-align:center;font-size:11.5px;color:var(--dash-muted);font-variant-numeric:tabular-nums}
.pp-reader-gate{display:grid;place-items:center;gap:12px;min-height:50vh;text-align:center;color:var(--dash-muted)}

/* ---- routed reader page --------------------------------------------------- */
.pp-variant{display:inline-flex;align-items:center;justify-content:center;text-decoration:none}
.pp-reader-page{width:100%;min-height:calc(100vh - 106px);display:grid;grid-template-rows:auto minmax(0,1fr);background:var(--dash-bg-3,#e9eaee);border:1px solid var(--dash-line);border-radius:16px;overflow:hidden}
.pp-reader-page .pp-reader-bar{position:sticky;top:0;z-index:2}
.pp-reader-back{display:inline-flex;align-items:center;min-height:34px;padding:0 12px;text-decoration:none;white-space:nowrap}
.pp-reader-page .pp-reader-body{min-height:0}
@media (max-width:640px){
  .pp-reader-page{min-height:calc(100vh - 82px);border-radius:12px}
  .pp-reader-page .pp-reader-bar{padding:10px 12px;gap:8px}
  .pp-reader-page .pp-reader-bar strong{order:3;width:100%}
  .pp-reader-page .pp-reader-tools{margin-left:auto}
  .pp-reader-page .pp-reader-body{padding:12px 8px}
}