/* Category Smart Practice — shared styles v20261022.1
   Look and colours follow the Cyberschool CBT student player (cbt.cyberschool.com.au). Light theme only, like the CBT. */
:root{
  --cbt-blue:#2374b7; --cbt-blue-2:#226cdc; --cbt-navy:#164974; --cbt-next:#4393e2; --cbt-next-bd:#3c83ca;
  --cbt-foot:#e6edf9; --cbt-tab:#f4f4f4; --cbt-frame:#b8c3cc; --cbt-tile:#c8c8c8; --cbt-done:#2063a6; --cbt-flag:#d9703f;
  --bg:var(--cbt-frame); --surface:#ffffff; --sunk:#f4f6f8; --ink:#1b1b1b; --muted:#5d6670; --line:#d3dbe2;
  --accent:var(--cbt-blue); --accent-ink:#ffffff; --accent-soft:var(--cbt-foot);
  --good:#2a8a3e; --good-soft:#e2f3e6; --bad:#c9302c; --bad-soft:#fbe4e3; --warn:#b26b00; --warn-soft:#fdf0db;
  --l1:#3c9a5f; --l2:#86a83b; --l3:#d09a1e; --l4:#d2672b; --l5:#a8344a;
  --f-body:"Helvetica Neue",Helvetica,Arial,"Apple SD Gothic Neo","Malgun Gothic","Noto Sans KR",sans-serif;
  --f-q:Arial,Helvetica,"Malgun Gothic",sans-serif;
  --f-mono:"Helvetica Neue",Helvetica,Arial,sans-serif; --r:2px;
  color-scheme:light;
}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:15px;line-height:1.5}
[hidden]{display:none!important}
.wrap{max-width:1078px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.sheet{max-width:1078px;margin:0 auto;background:var(--surface);min-height:100vh;box-shadow:0 0 0 1px rgba(0,0,0,.04)}
header.bar{background:transparent;color:#fff}
header.bar .wrap{background:var(--cbt-blue)}
header .wrap{display:flex;flex-wrap:wrap;gap:10px 20px;align-items:center;justify-content:space-between;min-height:60px;padding-block:8px}
.brand{display:flex;flex-direction:column;min-width:0}
.brand small{color:#cfe2f3;font-size:11px;letter-spacing:.08em;text-transform:uppercase}
.brand b{font-size:19px;font-weight:700;color:#fff}
.who{font-size:13px;color:#e3eef8}
.controls{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.seg{display:inline-flex;border:1px solid rgba(255,255,255,.5);border-radius:3px;overflow:hidden}
.seg button{border:0;background:transparent;color:#fff;font:inherit;font-size:13px;font-weight:700;padding:6px 11px;cursor:pointer}
.seg button[aria-pressed="true"]{background:#fff;color:var(--cbt-navy)}
button:focus-visible,select:focus-visible,input:focus-visible,textarea:focus-visible,a:focus-visible{outline:2px solid var(--cbt-blue-2);outline-offset:2px}
nav.tabs{background:transparent;position:sticky;top:0;z-index:5}
nav.tabs .wrap{background:var(--cbt-foot);border-bottom:1px solid #d3deef;display:flex;gap:2px;overflow-x:auto;scrollbar-width:none}
nav.tabs button{flex:none;border:0;background:none;font:inherit;font-size:15px;font-weight:700;color:#4b5a69;padding:13px 14px;border-bottom:3px solid transparent;cursor:pointer}
nav.tabs button[aria-selected="true"]{color:var(--cbt-navy);background:var(--cbt-tab);border-bottom-color:var(--cbt-blue)}
main{padding:0}
main .wrap{background:var(--surface);min-height:calc(100vh - 110px);padding-block:22px 60px}
h2{font-size:22px;margin:0 0 4px;color:var(--cbt-navy);text-wrap:balance}
h3{font-size:16px;margin:0 0 8px;color:var(--cbt-navy)}
.lede{color:var(--muted);margin:0 0 18px;max-width:72ch}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px;min-width:0}
.grid{display:grid;gap:14px}
.g2{grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr))}
.g3{grid-template-columns:repeat(auto-fill,minmax(min(100%,250px),1fr))}
.muted{color:var(--muted)}.small{font-size:13px}.tiny{font-size:12px}
.mono{font-family:var(--f-mono);font-variant-numeric:tabular-nums}
.btn{border:1px solid var(--cbt-next-bd);background:var(--cbt-next);color:#fff;font:inherit;font-weight:700;padding:10px 18px;border-radius:0;cursor:pointer;text-decoration:none;display:inline-block}
.btn:hover:not(:disabled){background:#3a86d4}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.sec{background:var(--cbt-foot);color:#333;border:1px solid #cdd9ec}
.btn.sm{padding:6px 11px;font-size:13px}
.chip{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;padding:2px 9px;border-radius:999px;white-space:nowrap;border:1px solid transparent}
.chip.weak{background:var(--bad-soft);color:var(--bad)}.chip.building{background:var(--warn-soft);color:var(--warn)}
.chip.strong{background:var(--good-soft);color:var(--good)}.chip.new{background:var(--sunk);color:var(--muted);border-color:var(--line)}
.lv{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:13px;white-space:nowrap}
.lv i{width:10px;height:10px;border-radius:3px;display:inline-block}
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}
table{border-collapse:collapse;width:100%;font-size:14px}
th,td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line);vertical-align:middle}
th{font-size:12px;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);font-weight:600;background:var(--sunk);white-space:nowrap}
tr:last-child td{border-bottom:0}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between}
.row.start{justify-content:flex-start}
.stack{display:flex;flex-direction:column;gap:12px}
.note{font-size:13px;color:var(--muted);border-left:3px solid var(--line);padding-left:10px;margin:12px 0 0}
.toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:2px;font-size:14px;z-index:20;max-width:calc(100% - 32px)}
.empty{padding:28px;text-align:center;color:var(--muted)}
.loading-card{display:flex;align-items:center;justify-content:center;gap:14px;min-height:calc(100vh - 170px);border:0;padding:0;color:var(--muted);background:#fff}
.loader-gif{width:64px;height:64px;object-fit:contain;flex:none}
.loading-overlay{position:absolute;inset:0;z-index:8;background:rgba(255,255,255,.86);display:flex;align-items:center;justify-content:center;color:var(--muted);font:700 15px var(--f-body)}
.loading-overlay .loader-gif{width:64px;height:64px}
body.is-loading button:not(:disabled),body.is-loading input,body.is-loading select{cursor:progress}
/* board */
.board{display:flex;gap:18px;align-items:center;flex-wrap:wrap}
.board .pl{display:flex;flex-direction:column;align-items:center;justify-content:center;width:92px;height:92px;border-radius:50%;border:3px solid var(--accent);flex:none}
.board .pl b{font-size:24px;font-family:var(--f-mono)}
.board .pl span{font-size:10px;line-height:1.1;text-align:center;padding:0 10px}
.plbar{height:8px;border-radius:99px;background:var(--sunk);border:1px solid var(--line);overflow:hidden}
.plbar i{display:block;height:100%;background:var(--accent)}
.stars{color:var(--warn);font-weight:700}
.badges{display:flex;flex-wrap:wrap;gap:6px}
.badge{font-size:12px;font-weight:600;padding:3px 9px;border-radius:2px;background:var(--accent-soft);color:var(--accent);border:1px solid var(--line)}
/* practice */
.ladder{display:grid;grid-template-columns:repeat(5,1fr);gap:4px}
.ladder div{height:32px;border-radius:2px;background:var(--sunk);border:1px solid var(--line);display:grid;place-items:center;font-size:12px;font-weight:600;color:var(--muted)}
.ladder div.on{color:#fff;border-color:transparent}
.progress{display:flex;gap:4px}.progress i{flex:1;height:6px;border-radius:3px;background:var(--sunk);border:1px solid var(--line)}
.progress i.ok{background:var(--good);border-color:var(--good)}.progress i.no{background:var(--bad);border-color:var(--bad)}.progress i.cur{background:var(--accent-soft);border-color:var(--accent)}
.passage{background:var(--sunk);border:1px solid var(--line);border-radius:2px;padding:14px;max-height:50vh;overflow:auto}
.q-stem{font-size:18px;line-height:1.6;max-width:70ch;overflow-wrap:anywhere}
.q-stem img,.passage img,.opt img,.sol img{max-width:100%;height:auto}
.opts{display:grid;gap:8px}
.opt{display:flex;gap:12px;align-items:center;text-align:left;width:100%;border:1.5px solid var(--line);background:var(--surface);color:var(--ink);font:inherit;font-size:16px;padding:11px 14px;border-radius:2px;cursor:pointer}
.opt b{font-family:var(--f-mono);width:26px;height:26px;border-radius:2px;display:grid;place-items:center;background:var(--sunk);flex:none}
.opt span{min-width:0;overflow-wrap:anywhere}
.opt[aria-pressed="true"]{border-color:var(--accent);background:var(--accent-soft)}
.opt.right{border-color:var(--good);background:var(--good-soft)}.opt.wrong{border-color:var(--bad);background:var(--bad-soft)}
.opt:disabled{cursor:default}
.feedback{padding:12px 14px;border-radius:2px;font-weight:600}
.feedback.ok{background:var(--good-soft);color:var(--good)}.feedback.no{background:var(--bad-soft);color:var(--bad)}
.sol{padding:12px 14px;border-left:3px solid var(--accent);background:var(--sunk);border-radius:0 8px 8px 0}
.theory{border:1px dashed var(--accent);border-radius:2px;padding:14px;background:var(--accent-soft)}
.theory ul{margin:6px 0 0;padding-left:20px}
.bigstars{font-size:44px;letter-spacing:6px;line-height:1}
.catcard{display:flex;flex-direction:column;gap:8px}
.catcard .name{font-weight:700;line-height:1.3}
.search{font:inherit;padding:8px 12px;border:1px solid var(--line);border-radius:2px;background:var(--surface);color:var(--ink);width:min(100%,320px)}
.spark{width:100%;height:42px;display:block}
.focus-card{border-left:4px solid var(--bad)}.focus-card.building{border-left-color:var(--warn)}
.days{display:flex;flex-wrap:wrap;gap:6px}
.days button{border:1px solid var(--line);background:var(--surface);color:var(--muted);font:inherit;font-size:13px;font-weight:600;padding:6px 10px;border-radius:2px;cursor:pointer}
.days button[aria-pressed="true"]{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.check{display:flex;gap:8px;align-items:flex-start;font-size:14px}
.tl{display:grid;grid-template-columns:130px 1fr;gap:12px;padding:9px 0;border-bottom:1px solid var(--line)}
.tl:last-child{border-bottom:0}.tl .when{font-family:var(--f-mono);font-size:12px;color:var(--muted)}
.whoTag{font-size:11px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;margin-right:6px}
.whoTag.parent{color:var(--accent)}.whoTag.student{color:var(--warn)}
.mailframe{width:100%;height:900px;border:1px solid var(--line);border-radius:var(--r);background:#eef1f0}
select,input[type=text],input[type=password],input[type=number],textarea{font:inherit;font-size:14px;padding:7px 9px;border-radius:2px;border:1px solid var(--line);background:var(--surface);color:var(--ink);max-width:100%}
textarea{width:100%;min-height:96px}
.src{font-size:11px;font-weight:700;padding:2px 7px;border-radius:5px;font-family:var(--f-mono)}
.src.prior{background:var(--sunk);color:var(--muted)}.src.blend{background:var(--warn-soft);color:var(--warn)}.src.actual{background:var(--good-soft);color:var(--good)}
.big{font-size:30px;font-weight:700;margin:2px 0}
.hbar{display:grid;grid-template-columns:minmax(90px,auto) 1fr 56px;gap:10px;align-items:center;font-size:13px}
.hbar>div{height:12px;background:var(--sunk);border-radius:4px;overflow:hidden}.hbar i{display:block;height:100%}.hbar b{text-align:right}
.ok-dot{color:var(--good)}.bad-dot{color:var(--bad)}
@media (max-width:560px){.q-stem{font-size:16px}.tl{grid-template-columns:1fr;gap:2px}}
@media (prefers-reduced-motion:no-preference){.opt,.btn,.seg button{transition:background .15s,border-color .15s}}

/* ---------- CBT player (practice round) ---------- */
body.playing{background:var(--cbt-frame)}
body.playing header.bar,body.playing nav.tabs{display:none}
body.playing main .wrap{padding:0;max-width:none;background:transparent;min-height:0}
.player{max-width:1078px;margin:0 auto;height:100vh;height:100dvh;display:flex;flex-direction:column;background:#fff;font-family:var(--f-q)}
.ph{height:60px;flex:none;background:var(--cbt-blue);display:flex;align-items:stretch;color:#fff;position:relative}
.ph-l{display:flex;align-items:center;gap:12px;padding:0 14px;min-width:0;flex:1}
.ph-lv{display:flex;flex-direction:column;line-height:1.05;border-left:1px solid rgba(255,255,255,.25);padding-left:12px}
.ph-lv b{font-size:24px;font-weight:400;letter-spacing:1px}
.ph-lv small{font-size:11px;color:#dbe9f6}
.ph-exit{width:44px;height:44px;border-radius:100px;border:1px solid var(--cbt-blue-2);background:var(--cbt-blue-2);color:#fff;font-size:10px;line-height:1.1;white-space:nowrap;padding:0;cursor:pointer;flex:none}
.ph-sum{flex:none;width:min(447px,46%);background:var(--cbt-tab);border:0;color:var(--cbt-navy);font:700 24px var(--f-body);display:flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;position:relative}
.ph-sum .n{font-size:38px;line-height:1}
.ph-sum .grid-ic{display:inline-grid;grid-template-columns:repeat(4,5px);gap:2px;margin-left:6px}
.ph-sum .grid-ic i{width:5px;height:5px;background:var(--cbt-navy);display:block}
.ph-sum[aria-expanded="true"]::after{content:"";position:absolute;bottom:-9px;left:50%;margin-left:-9px;border:9px solid transparent;border-bottom:0;border-top-color:var(--cbt-tab)}
.ph-r{flex:1;display:flex;align-items:center;justify-content:flex-end;padding:0 14px;gap:6px}
.ph-r .dot{width:12px;height:12px;border-radius:50%;border:2px solid rgba(255,255,255,.6)}
.ph-r .dot.ok{background:#fff;border-color:#fff}
.pbody{flex:1;min-height:0;position:relative;overflow:hidden;background-color:#fff}
.wm{position:absolute;inset:0;pointer-events:none;opacity:1}
.pmeta{position:absolute;top:10px;right:22px;font:700 14px var(--f-body);color:#b9b9b9;z-index:2;white-space:nowrap}
.pmeta i{font-weight:400}
.pcols{position:relative;z-index:1;height:100%;display:flex}
.pcol{flex:1;min-width:0;overflow:auto;padding:46px 28px 28px 50px;font:16px/24px var(--f-q);color:#000}
.pcol.right{padding-left:50px;padding-right:50px}
.pcols.split .pcol.left{border-right:1px solid #ddd;padding-right:44px}
.pcols.solo .pcol.right{max-width:820px}
.pcol p{margin:0 0 8px}
.pcol img{max-width:100%;height:auto}
.choices{display:flex;flex-direction:column;gap:6px;margin-top:14px}
.choice{display:flex;align-items:center;gap:22px;background:none;border:0;padding:3px 6px 3px 0;font:16px/24px var(--f-q);color:#000;text-align:left;cursor:pointer;width:100%}
.choice:disabled{cursor:default}
.choice .rd{width:34px;height:34px;border-radius:50%;flex:none;background:linear-gradient(#ffffff,#e6e6e6);border:1px solid #b3b3b3;box-shadow:inset 0 1px 2px rgba(0,0,0,.08);position:relative}
.choice[aria-pressed="true"] .rd{border-color:#4f8fd6;box-shadow:0 0 0 3px #bcd6f3}
.choice[aria-pressed="true"] .rd::after{content:"";position:absolute;inset:8px;border-radius:50%;background:#2d74c9}
.choice .tx{min-width:0;overflow-wrap:anywhere;display:block;flex:1}
.choice .tx table{width:auto!important;max-width:100%;border-collapse:collapse!important}
.choice .tx table,.choice .tx tbody,.choice .tx tr{border:0!important;background:transparent!important}
.choice .tx td{width:auto!important;border:0!important;padding:0!important;vertical-align:baseline!important;background:transparent!important}
.choice .tx td:first-child{white-space:nowrap;padding-right:8px!important}
.choice .tx p{margin:0!important}
.choice .tx .table-automated{display:inline-table}
.choice.right .rd{border-color:var(--good);box-shadow:0 0 0 3px #bfe3c8}
.choice.right .rd::after{content:"✓";position:absolute;inset:0;display:grid;place-items:center;color:#fff;background:var(--good);border-radius:50%;font:700 18px var(--f-body)}
.choice.wrong .rd{border-color:var(--bad);box-shadow:0 0 0 3px #f2c3c1}
.choice.wrong .rd::after{content:"✕";position:absolute;inset:0;display:grid;place-items:center;color:#fff;background:var(--bad);border-radius:50%;font:700 16px var(--f-body)}
.choice.right .tx{font-weight:700}
.pfb{margin-top:22px;display:flex;flex-direction:column;gap:12px;font-family:var(--f-body)}
.pfb .feedback{border-radius:0;font-size:15px}
.pfb .sol,.pfb .theory{border-radius:0;font-size:15px}
.pflag{font:13px var(--f-body);color:#777;margin-top:8px}
.pf{height:61px;flex:none;background:var(--cbt-foot);display:flex;align-items:stretch;justify-content:space-between}
.pf-l{display:flex;align-items:center;gap:8px;padding:0 14px;min-width:0}
.pf-l .mini{display:flex;gap:3px}
.pf-l .mini span{width:30px;height:24px;display:grid;place-items:center;font:700 11px var(--f-body);color:#6b7785;background:#fff;border:1px solid #cdd9ec}
.pf-l .mini span.on{color:#fff;border-color:transparent}
.pf-l .lvtx{font:13px var(--f-body);color:#4b5a69;margin-left:6px}
.pf-r{display:flex}
.pbtn{border:1px solid transparent;font:700 20px var(--f-body);padding:0 26px;min-width:198px;display:flex;align-items:center;justify-content:center;gap:14px;cursor:pointer}
.pbtn.next{background:var(--cbt-next);border-color:var(--cbt-next-bd);color:#fff}
.pbtn.next:disabled{background:#a9c9ea;border-color:#a9c9ea;cursor:not-allowed}
.pbtn.next .tri{width:0;height:0;border:8px solid transparent;border-right:0;border-left:11px solid rgba(255,255,255,.85)}
.pbtn.ghost{background:var(--cbt-foot);color:#333;min-width:150px}
/* progress summary overlay */
.psum{position:absolute;inset:0;z-index:5;background:rgba(255,255,255,.97);overflow:auto;padding:22px 16px;font-family:var(--f-body)}
.psum h4{margin:6px 0 12px;text-align:center;color:#4f86c4;font-size:22px}
.legend{display:flex;flex-wrap:wrap;justify-content:center;border:1px solid #e3e3e3;width:max-content;max-width:100%;margin:0 auto 20px}
.legend span{display:flex;align-items:center;gap:10px;padding:12px 16px;font-size:15px;color:#444;border-right:1px solid #e3e3e3}
.legend span:last-child{border-right:0}
.legend i{width:30px;height:30px;display:grid;place-items:center;font:700 14px var(--f-body);font-style:normal}
.tiles{display:grid;grid-template-columns:repeat(5,58px);gap:22px;justify-content:center}
.tile{width:58px;height:58px;display:grid;place-items:center;font:700 22px var(--f-body);color:#555;background:var(--cbt-tab);border:3px solid var(--cbt-tile)}
.tile.ok{background:var(--cbt-done);border-color:var(--cbt-done);color:#fff}
.tile.no{background:#fff;border-color:var(--bad);color:var(--bad)}
.tile.cur{border-color:var(--cbt-next);color:var(--cbt-navy);background:#fff}
@media (max-width:760px){
  .pcols.split{flex-direction:column;overflow:auto}
  .pcols.split .pcol{overflow:visible;flex:none}
  .pcols.split .pcol.left{border-right:0;border-bottom:1px solid #ddd}
  .pcol,.pcol.right{padding:40px 16px 20px}
  .ph-sum{font-size:16px;width:auto;padding:0 14px}.ph-sum .n{font-size:26px}
  .ph-r{display:none}
  .pbtn{min-width:0;padding:0 18px;font-size:17px}
  .pf-l .lvtx{display:none}
  .pmeta{right:12px;font-size:12px}
  .tiles{grid-template-columns:repeat(5,48px);gap:12px}.tile{width:48px;height:48px;font-size:18px}
}
.q-stem-cbt{font:16px/24px var(--f-q);color:#000;overflow-wrap:anywhere}
.donebox{border:3px solid #b7d0ef;border-radius:6px;padding:26px 22px;text-align:center;background:rgba(255,255,255,.92)}
.donebox .dtitle{font:700 22px var(--f-body);color:#000}
.donebox .dsub{font:700 20px var(--f-body);color:#666;margin:8px 0 14px}
.donebox .bigstars{margin:6px 0 12px}
.donebox .dline{margin:0 0 8px;font-size:16px}
.donebox .legend{margin-top:18px}