.lesson-nav{direction:rtl;display:grid;grid-template-columns:auto minmax(230px,430px) auto;justify-content:center;align-items:center;gap:10px;padding:12px 15px;background:#fff;box-shadow:0 4px 18px #17304717;position:sticky;top:0;z-index:20}.lesson-nav select{padding:10px 14px;border:2px solid #72b8d2;border-radius:12px;background:#f7fcfe;color:#173047;font:700 16px "Noto Nastaliq Urdu"}.nav-arrow{text-decoration:none;color:#fff;background:#1689b8;border-radius:11px;padding:9px 14px;font-weight:700}.nav-arrow.disabled{opacity:.35;pointer-events:none}@media(max-width:600px){.lesson-nav{grid-template-columns:auto 1fr auto;gap:5px}.lesson-nav select{min-width:0;width:100%;font-size:12px}.nav-arrow{font-size:0;padding:9px}.nav-arrow:first-child:before{content:'→';font-size:22px}.nav-arrow:last-child:before{content:'←';font-size:22px}}