/* AARS Abhyas — shared styles for Papers, Chapter-wise PYQ, Custom Test, My Progress, Practice. */
[hidden]{display:none!important}
:root{--bg:#F6F7FB;--panel:#FFFFFF;--ink:#1B2233;--muted:#5E6780;--line:#E2E5EE;--soft:#EEF1F7;--acc:#1F6FB2;--acc-soft:#E4EFFA;
  --ok:#2E9E4F;--bad:#D93A2B;--warn:#B7791F;--e:#2E9E4F;--m:#B7791F;--t:#C2410C;
  --f-display:"Martel",Georgia,serif;--f-body:"Hind","Noto Sans",system-ui,-apple-system,"Segoe UI",sans-serif}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#10141D;--panel:#171C28;--ink:#E7EAF2;--muted:#9AA3B8;--line:#2A3142;--soft:#1E2433;--acc:#6FAEE8;--acc-soft:#182B40;
  --ok:#6CC793;--bad:#F08A7E;--warn:#E4B261;--e:#6CC793;--m:#E4B261;--t:#F59E6B;color-scheme:dark}}
:root[data-theme="dark"]{--bg:#10141D;--panel:#171C28;--ink:#E7EAF2;--muted:#9AA3B8;--line:#2A3142;--soft:#1E2433;--acc:#6FAEE8;--acc-soft:#182B40;
  --ok:#6CC793;--bad:#F08A7E;--warn:#E4B261;--e:#6CC793;--m:#E4B261;--t:#F59E6B;color-scheme:dark}
body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.55 var(--f-body)}
button,input,select{font:inherit;color:inherit}
.wrap{max-width:1080px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));padding-block:18px 48px}
/* shell */
#shell-top{border-bottom:1px solid var(--line);margin-bottom:18px}
.brandrow{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px}
.brand{font-family:var(--f-display);font-weight:800;font-size:22px;color:var(--ink);text-decoration:none}
.exam{display:inline-flex;background:var(--soft);border-radius:10px;padding:3px;gap:2px}
.exam button{border:0;background:none;padding:4px 10px;border-radius:8px;font-size:13px;color:var(--muted);font-weight:500;cursor:pointer}
.exam button[aria-pressed="true"]{background:var(--panel);color:var(--acc);box-shadow:0 1px 2px rgba(0,0,0,.08)}
.exam button:disabled{cursor:default;opacity:.55}
.topnav{display:flex;gap:4px 18px;margin:10px 0 0;font-weight:500;overflow-x:auto;scrollbar-width:none;white-space:nowrap}
.topnav::-webkit-scrollbar{display:none}
.topnav a{color:var(--muted);text-decoration:none;padding:4px 0 8px;border-bottom:2px solid transparent}
.topnav a[aria-current="page"]{color:var(--acc);border-color:var(--acc)}
.topnav a:focus-visible,.exam button:focus-visible{outline:2px solid var(--acc);outline-offset:2px}
#shell-foot{font-size:13px;color:var(--muted);margin-top:34px;border-top:1px solid var(--line);padding-top:14px;display:grid;gap:4px}
#shell-foot b{color:var(--ink);font-weight:600}
h1{font-family:var(--f-display);font-size:clamp(22px,3vw,28px);line-height:1.25;margin:0 0 4px}
.note{color:var(--muted);font-size:14px;margin:0 0 14px}
h2.sec{font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:22px 0 8px}
/* controls */
.seg{display:inline-flex;flex-wrap:wrap;background:var(--soft);border-radius:10px;padding:3px;gap:2px}
.seg button{border:0;background:none;cursor:pointer;padding:6px 12px;border-radius:8px;font-size:14px;color:var(--muted);font-weight:500}
.seg button[aria-pressed="true"]{background:var(--panel);color:var(--acc);box-shadow:0 1px 2px rgba(0,0,0,.08)}
.chipbtn{border:1px solid var(--line);background:var(--panel);border-radius:999px;padding:4px 12px;font-size:13.5px;cursor:pointer;color:var(--muted)}
.chipbtn[aria-pressed="true"]{border-color:var(--acc);background:var(--acc-soft);color:var(--acc);font-weight:600}
.seg button:focus-visible,.chipbtn:focus-visible,.b:focus-visible,select:focus-visible,input:focus-visible{outline:2px solid var(--acc);outline-offset:2px}
select,input[type=number]{border:1px solid var(--line);background:var(--panel);border-radius:8px;padding:5px 8px;font-size:14px}
.filters{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:12px 14px;display:flex;flex-wrap:wrap;gap:10px 22px;align-items:center;margin:12px 0 16px}
.fg{display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.fg>span{font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);font-weight:600;margin-right:2px}
.b{border:1px solid var(--line);background:var(--panel);border-radius:8px;padding:6px 14px;font-weight:600;font-size:14px;cursor:pointer;text-decoration:none;color:var(--ink);display:inline-block}
.b.pri{background:var(--acc);border-color:var(--acc);color:#fff}
.b.sm{padding:3px 10px;font-size:13px}
.b:disabled{opacity:.45;cursor:default}
/* unit list */
.unit{background:var(--panel);border:1px solid var(--line);border-radius:14px;margin-bottom:10px;overflow:hidden}
.uh{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px 14px;align-items:center;padding:12px 16px}
.uh button.tg{all:unset;cursor:pointer;display:grid;gap:2px;min-width:0}
.uh button.tg:focus-visible{outline:2px solid var(--acc);outline-offset:4px;border-radius:4px}
.uh b{font-size:16px}
.uh .meta{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.acts{display:flex;gap:6px;flex-wrap:wrap}
.bar{display:block;height:5px;background:var(--soft);border-radius:999px;overflow:hidden;margin-top:6px;max-width:260px}
.bar i{display:block;height:100%;background:var(--ok)}
.tl{border-top:1px solid var(--line)}
.tr{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:6px 14px;align-items:center;padding:9px 16px 9px 28px;border-top:1px solid var(--line)}
.tr:first-child{border-top:0}
.tr .meta{font-size:12.5px;color:var(--muted);font-variant-numeric:tabular-nums}
.dd{display:inline-flex;gap:8px;font-size:12.5px;color:var(--muted)}
.dd .e{color:var(--e)}.dd .m{color:var(--m)}.dd .t{color:var(--t)}
.empty{color:var(--muted);padding:18px;text-align:center;background:var(--panel);border:1px dashed var(--line);border-radius:14px}
/* tiles & tables */
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin:12px 0 8px}
.tile{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.tile small{display:block;color:var(--muted);font-size:12.5px}
.tile b{font-size:24px;font-variant-numeric:tabular-nums}
.tw{overflow-x:auto;background:var(--panel);border:1px solid var(--line);border-radius:14px}
table.t{border-collapse:collapse;width:100%;font-size:14px}
table.t th,table.t td{padding:8px 12px;border-top:1px solid var(--line);text-align:left;font-variant-numeric:tabular-nums;vertical-align:middle}
table.t thead th{border-top:0;font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);font-weight:600}
table.t td.n,table.t th.n{text-align:right}
/* custom test tree */
.tree .unit .uh{grid-template-columns:auto minmax(0,1fr) auto}
.tree label{display:flex;gap:10px;align-items:center;cursor:pointer;min-width:0}
.tree input[type=checkbox]{width:18px;height:18px;accent-color:var(--acc);flex:none}
.sticky{position:sticky;bottom:0;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:12px 16px;margin-top:14px;display:flex;flex-wrap:wrap;gap:10px 16px;align-items:center;justify-content:space-between;box-shadow:0 -4px 16px rgba(0,0,0,.06);margin-bottom:max(0px,env(safe-area-inset-bottom,0px))}
/* papers */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:10px}
a.card{display:grid;gap:4px;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 16px;text-decoration:none;color:inherit}
a.card:hover{border-color:var(--acc)}
a.card:focus-visible{outline:2px solid var(--acc);outline-offset:2px}
a.card b{font-size:16px}
a.card span{font-size:13px;color:var(--muted)}
a.card .st{font-weight:600;color:var(--ok)}
a.card .st.ip{color:var(--warn)}
h3.mon{font-size:15px;margin:14px 0 8px;font-weight:600}
@media (max-width:560px){.uh{grid-template-columns:minmax(0,1fr)}.tr{grid-template-columns:minmax(0,1fr);padding-left:22px}}