/* AI পাঠশালা — shared styles for account, reader, admin pages and the buy popup.
   Tokens match index.html (blackboard green + marigold). */
:root{
  --board:#1d3b33; --board-2:#16302a; --chalk:#f3f1e8;
  --paper:#fbfaf6; --card:#ffffff; --ink:#1b2622; --muted:#5d6b65; --line:#dde3df;
  --gold:#e9a23b; --gold-ink:#8a5410; --danger:#b8442f; --ok:#2f7d5a;
  --display:"Baloo Da 2","Hind Siliguri",system-ui,sans-serif;
  --body:"Hind Siliguri",system-ui,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,Consolas,monospace;
}
[hidden]{display:none!important}
.ap-page{margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);font-size:16px;line-height:1.65}
.ap-page *{box-sizing:border-box}
.ap-page h1,.ap-page h2,.ap-page h3{font-family:var(--display);line-height:1.25;margin:0}
.ap-wrap{max-width:1040px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.ap-top{background:var(--board);color:var(--chalk);position:sticky;top:0;z-index:20}
.ap-top .ap-wrap{display:flex;align-items:center;gap:14px;padding-block:12px}
.ap-logo{display:flex;align-items:center;gap:8px;text-decoration:none;color:inherit;font-family:var(--display);font-weight:800;font-size:21px}
.ap-logo b{color:var(--gold)}
.ap-top nav{margin-left:auto;display:flex;gap:16px;align-items:center;font-size:15px}
.ap-top nav a{color:inherit;text-decoration:none;opacity:.9}
.ap-top nav a:hover{color:var(--gold)}
.ap-linkbtn{background:none;border:1px solid rgba(243,241,232,.35);color:inherit;border-radius:999px;padding:5px 14px;font:inherit;font-size:14px;cursor:pointer}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:600 15px var(--body);padding:11px 18px;border-radius:10px;border:0;cursor:pointer;text-decoration:none;line-height:1.2}
.btn-gold{background:var(--gold);color:#2a1a04}
.btn-ghost{background:transparent;color:inherit;border:1.5px solid currentColor}
.btn-dark{background:var(--board);color:var(--chalk)}
.btn:disabled{opacity:.6;cursor:default}
.btn:focus-visible,.ap-page input:focus-visible,.ap-page button:focus-visible,.ap-page select:focus-visible{outline:3px solid var(--gold);outline-offset:2px}

/* auth form */
.ap-auth{display:grid;gap:10px}
.ap-tabs{display:grid;grid-template-columns:1fr 1fr;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:4px;gap:4px}
.ap-tabs button{border:0;background:transparent;border-radius:9px;padding:9px;font:600 15px var(--body);color:var(--muted);cursor:pointer}
.ap-tabs button.on{background:var(--card);color:var(--ink);box-shadow:0 1px 4px rgba(0,0,0,.08)}
.ap-form{display:grid;gap:6px}
.ap-form label{font-size:14px;font-weight:600;margin-top:6px}
.ap-form input,.ap-form select{font:16px var(--body);padding:10px 12px;border:1.5px solid var(--line);border-radius:10px;background:var(--paper);color:var(--ink);width:100%}
.ap-form input:focus,.ap-form select:focus{outline:none;border-color:var(--gold)}
.ap-form [aria-invalid="true"]{border-color:var(--danger)}
.ap-form .ap-check{display:flex;gap:8px;align-items:flex-start;font-weight:400;font-size:13px}
.ap-form .ap-check input{width:auto;margin-top:4px}
.ap-hp{position:absolute!important;left:-9999px!important;width:1px!important;height:1px!important}
.ap-err{color:var(--danger);font-size:14px;min-height:1.2em;margin:4px 0 0}
.ap-small{font-size:13px;color:var(--muted);margin:0}
.ap-form .btn{margin-top:10px}

/* progress bar */
.ap-bar{height:10px;border-radius:999px;background:var(--line);overflow:hidden}
.ap-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--ok),var(--gold));border-radius:999px;transition:width .4s}
@media (prefers-reduced-motion:reduce){.ap-bar i{transition:none}}

/* buy popup */
.ck-back{position:fixed;inset:0;z-index:60;background:rgba(10,20,17,.6);display:flex;align-items:center;justify-content:center;padding:max(16px,env(safe-area-inset-top,0px)) max(16px,env(safe-area-inset-right,0px)) max(16px,env(safe-area-inset-bottom,0px)) max(16px,env(safe-area-inset-left,0px))}
.ck{background:var(--card);color:var(--ink);border-radius:16px;width:100%;max-width:480px;max-height:100%;overflow:auto;padding:24px 22px;position:relative;box-shadow:0 20px 50px rgba(0,0,0,.35);font-family:var(--body);line-height:1.6}
.ck h3{font:700 22px/1.3 var(--display);margin:4px 0 14px;color:var(--ink)}
.ck-x{position:absolute;top:10px;right:12px;border:0;background:transparent;font-size:28px;line-height:1;color:var(--muted);cursor:pointer}
.ck-book{font-size:14px;color:var(--muted);margin:0 30px 12px 0}
.ck-book b{color:var(--ink)}
.ck-steps{display:flex;gap:4px;list-style:none;padding:0;margin:0 0 18px;counter-reset:s}
.ck-steps li{flex:1;font-size:11.5px;text-align:center;color:var(--muted);counter-increment:s;padding-top:28px;position:relative;line-height:1.3}
.ck-steps li::before{content:counter(s);position:absolute;top:0;left:50%;transform:translateX(-50%);width:24px;height:24px;border-radius:50%;border:2px solid var(--line);display:grid;place-items:center;font-weight:700;background:var(--card);font-size:12px}
.ck-steps li.on{color:var(--ink);font-weight:600}
.ck-steps li.on::before{border-color:var(--gold);background:var(--gold);color:#2a1a04}
.ck-steps li.done::before{content:"✓";border-color:var(--ok);background:var(--ok);color:#fff}
.ck-methods{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.ck-m{border:2px solid var(--line);background:var(--paper);color:var(--ink);border-radius:12px;padding:18px 10px;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:4px;font:inherit}
.ck-m b{font-size:22px;font-family:var(--display)}
.ck-m span{font-size:13px;color:var(--muted)}
.ck-m[data-method="bkash"] b{color:#c2185b}
.ck-m[data-method="nagad"] b{color:#e8590c}
.ck-m:hover,.ck-m:focus-visible{border-color:var(--gold)}
.ck-how{padding-left:20px;display:grid;gap:10px;margin:0 0 12px}
.ck-num{display:flex;align-items:center;gap:10px;margin-top:6px;background:var(--board);color:var(--chalk);border-radius:10px;padding:10px 14px}
.ck-num b{font:700 24px var(--mono);letter-spacing:.02em;user-select:all;flex:1}
.ck-num .btn{padding:6px 12px;color:var(--chalk)}
.ck-note{font-size:13px;color:var(--muted);margin:10px 0 0}
.ck-nav{display:flex;justify-content:space-between;gap:10px;margin-top:16px}
.ck-nav .btn:only-child{margin-left:auto}
.ck-who{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-size:14px;margin-bottom:6px}