/* app layer — only what the theme does not own */
*{box-sizing:border-box}
/* `hidden` must beat any class rule: .login sets display:grid, and an author rulesheet
   outranks the UA's [hidden]{display:none} — without this line a hidden overlay is still
   painted and a signed-in reader keeps staring at the sign-in card. */
[hidden]{display:none!important}
html,body{margin:0;padding:0}
body{
  background:var(--body-bg);color:var(--text);
  font-family:Vazirmatn,"Segoe UI",Tahoma,sans-serif;font-size:14px;line-height:1.85;
  min-height:100vh;display:flex;flex-direction:column;
}
@font-face{
  font-family:Vazirmatn;src:url("/assets/fonts/Vazirmatn[wght].woff2") format("woff2");
  font-weight:100 900;font-display:swap;
}
.muted{color:var(--text-muted)}
.small{font-size:12.5px}
.mono{font-family:var(--font-mono,ui-monospace,monospace);font-size:11.5px;direction:ltr;unicode-bidi:isolate}

.app-bar{position:sticky;top:0;z-index:20;background:var(--bg-surface);border-bottom:1px solid var(--border-color)}
.bar-in{max-width:1240px;margin:0 auto;padding:0 16px;height:56px;display:flex;align-items:center;gap:12px}
.brand{display:flex;align-items:center;gap:9px;min-width:0}
.logo{
  width:30px;height:30px;border-radius:8px;background:var(--primary);color:#fff;
  display:grid;place-items:center;font-weight:700;font-size:15px;flex:none
}
.logo.big{width:52px;height:52px;font-size:24px;border-radius:14px;margin:0 auto 12px}
.brand-txt{display:flex;flex-direction:column;line-height:1.3;min-width:0}
.brand-txt strong{font-size:14.5px}
.brand-txt span{font-size:11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:320px}
.spacer{flex:1}

.chip{
  font:inherit;font-size:12px;color:var(--text-secondary);background:var(--bg-surface-secondary);
  border:1px solid var(--border-color);border-radius:999px;padding:5px 12px;cursor:pointer;
  text-decoration:none;white-space:nowrap
}
.chip:hover{border-color:var(--primary);color:var(--primary)}
.chip.on{background:var(--primary-lt,rgba(59,130,246,.12));border-color:var(--primary);color:var(--primary-ink,var(--primary))}
.btn{display:inline-block;font:inherit;font-size:13.5px;padding:9px 20px;border-radius:var(--radius);
  border:1px solid var(--border-color);background:var(--bg-surface);color:var(--text);cursor:pointer;text-decoration:none}
.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:600}

/* ---------------- login ---------------- */
.login{position:fixed;inset:0;display:grid;place-items:center;background:var(--body-bg);z-index:50;padding:20px}
.login-card{max-width:380px;text-align:center;background:var(--bg-surface);border:1px solid var(--border-color);
  border-radius:var(--radius-lg,16px);padding:32px 28px}
.login-card h1{font-size:20px;margin:0 0 6px}
.login-card p{margin:0 0 20px}
.err{color:var(--red,var(--primary))}

/* ---------------- shell ---------------- */
.shell{flex:1;display:grid;grid-template-columns:290px minmax(0,1fr);gap:0;max-width:1240px;margin:0 auto;width:100%}
.side{border-inline-start:1px solid var(--border-color);border-inline-end:0;background:var(--bg-surface);
  padding:14px 10px 0;display:flex;flex-direction:column;position:sticky;top:56px;height:calc(100vh - 56px);overflow:auto}
.side-head{display:flex;align-items:baseline;justify-content:space-between;padding:0 8px 8px}
.kicker{font-size:11px;letter-spacing:.04em;color:var(--text-muted);font-weight:600}
.chapters{display:flex;flex-direction:column;gap:1px;padding-bottom:10px}
.ch{
  display:flex;gap:8px;align-items:baseline;font:inherit;font-size:12.8px;text-align:start;
  background:none;border:0;border-radius:var(--radius);padding:7px 9px;cursor:pointer;color:var(--text-secondary);
  line-height:1.6
}
.ch:hover{background:var(--bg-surface-secondary);color:var(--text)}
.ch.active{background:var(--primary-lt,rgba(59,130,246,.12));color:var(--primary-ink,var(--primary));font-weight:600}
.ch .n{font-size:11px;color:var(--text-muted);min-width:16px;direction:ltr}
.ch .t{flex:1;min-width:0}
.ch .dot{width:6px;height:6px;border-radius:50%;flex:none;margin-top:7px;background:var(--border-color)}
.ch .dot.done{background:var(--green,#22c55e)}
.ch .dot.part{background:var(--orange,#f59e0b)}
.ch.front{opacity:.62}
.cost{margin-top:auto;border-top:1px solid var(--border-color);padding:10px 8px 14px;display:flex;flex-direction:column;gap:4px}
.cost-row{display:flex;justify-content:space-between;align-items:baseline;gap:8px}

.read{padding:26px 34px 60px;min-width:0}
.doc{max-width:720px;margin:0 auto}
.doc h1{font-size:23px;line-height:1.55;margin:0 0 4px}
.doc h2{font-size:18.5px;margin:34px 0 6px}
.doc h3{font-size:16px;margin:26px 0 4px}
.doc h4,.doc h6{font-size:14.5px;margin:22px 0 4px}
.doc .en-title{font-size:12.5px;color:var(--text-muted);margin:0 0 22px;direction:ltr;text-align:start;unicode-bidi:isolate}

/* ---------------- blocks ---------------- */
.u{margin:0 0 15px;position:relative}
.u.p{font-size:15.5px;line-height:2.05}
.u.li{margin:0 0 7px;padding-inline-start:18px;position:relative;font-size:15.3px;line-height:2}
.u.li::before{content:"•";position:absolute;inset-inline-start:4px;color:var(--text-muted)}
.u.cap{font-size:12.5px;line-height:1.9;color:var(--text-muted);margin:6px 0 18px}
.u .fa{display:block}
.u .fa .pending{color:var(--text-muted);font-style:italic}
/* The source sits under the translation, isolated: a Latin sentence inside an RTL
   paragraph otherwise drags punctuation to the wrong end. */
.u .en{display:none;margin-top:6px;padding:8px 10px;border-inline-start:2px solid var(--border-color);
  font-size:12.8px;line-height:1.85;color:var(--text-secondary);direction:ltr;text-align:left;unicode-bidi:isolate}
.u.open .en{display:block}
.u{cursor:pointer}
.doc.show-en .u .en{display:block}
.u code,.u .en code{
  font-family:var(--font-mono,ui-monospace,monospace);font-size:.86em;background:var(--bg-surface-secondary);
  padding:1px 4px;border-radius:4px;direction:ltr;unicode-bidi:isolate;display:inline-block
}
figure{margin:20px 0 24px;text-align:center}
figure img{max-width:100%;height:auto;border-radius:var(--radius);border:1px solid var(--border-color-light,rgba(0,0,0,.06))}
pre{
  direction:ltr;text-align:left;unicode-bidi:isolate;background:var(--bg-surface-secondary);
  border:1px solid var(--border-color);border-radius:var(--radius);padding:12px 14px;overflow:auto;
  font-family:var(--font-mono,ui-monospace,monospace);font-size:12.3px;line-height:1.7;margin:18px 0 22px
}
table{width:100%;border-collapse:collapse;margin:10px 0 22px;font-size:13px}
table td,table th{border:1px solid var(--border-color);padding:6px 9px;line-height:1.8;vertical-align:top}
table th{background:var(--bg-surface-secondary);font-weight:600}
.tcap{font-size:12.5px;color:var(--text-muted);margin:0 0 4px}
.empty{padding:60px 0;text-align:center}

.pager{max-width:720px;margin:34px auto 0;display:flex;align-items:center;justify-content:space-between;gap:10px}
.pager .chip[disabled]{opacity:.4;cursor:default}

@media (max-width:860px){
  .shell{grid-template-columns:1fr}
  .side{position:static;height:auto;order:2;border-inline-start:0;border-top:1px solid var(--border-color)}
  .read{padding:18px 16px 40px}
  .cost{margin-top:10px}
}
@media print{
  .app-bar,.side,.pager,.login{display:none!important}
  body{background:#fff}
  .shell{display:block;max-width:none}
  .read{padding:0}
  .doc{max-width:none}
  .u .en{display:none!important}
  .u{break-inside:avoid}
}