.dars-sim{z-index:var(--dars-z-sim);background:var(--dars-bg);color:var(--dars-ink);overscroll-behavior:contain;-webkit-overflow-scrolling:touch;font-feature-settings:"kern";line-height:1.6;font-family:var(--font-arabic), system-ui, -apple-system, "Segoe UI", Tahoma, sans-serif;justify-content:center;display:flex;position:fixed;inset:0;overflow-y:auto}.dars-shell{width:100%;max-width:1040px;padding:calc(18px + env(safe-area-inset-top)) clamp(16px, 4vw, 40px) calc(64px + env(safe-area-inset-bottom));margin-inline:auto}.dars-sim.has-sidebar{justify-content:flex-start;overflow:hidden}.dars-sim.has-sidebar .dars-main{-webkit-overflow-scrolling:touch;overscroll-behavior:contain;flex:auto;min-width:0;height:100%;overflow-y:auto}.dars-sim.has-sidebar .dars-shell{max-width:none;padding-top:calc(20px + env(safe-area-inset-top));margin-inline:0}@media (max-width:879px){.dars-sim.has-sidebar .dars-shell{padding-top:calc(68px + env(safe-area-inset-top))}}.dars-main>.dars-prebar{padding:calc(12px + env(safe-area-inset-top)) clamp(16px, 4vw, 40px) 0;align-items:center;max-width:1040px;margin-inline:auto;display:flex}.dars-stem,.dars-reveal-why,.dars-intro h1,.dars-ready{max-width:72ch}.dars-sim button{font:inherit;cursor:pointer}.dars-topbar{justify-content:space-between;align-items:center;margin-bottom:18px;display:flex}.dars-back{color:var(--dars-muted);align-items:center;gap:6px;min-height:44px;padding:0 8px;font-size:13px;text-decoration:none;display:inline-flex}.dars-back:hover{color:var(--dars-ink)}.dars-back:active{color:var(--dars-brand)}.dars-brand-link{color:var(--dars-ink);align-items:center;min-height:44px;display:inline-flex}.dars-ghost{color:var(--dars-muted);border:1px solid var(--dars-line);background:0 0;border-radius:999px;align-items:center;gap:6px;min-height:44px;padding:10px 16px;font-size:13px;display:inline-flex}.dars-ghost:hover{color:var(--dars-ink);border-color:var(--dars-brand)}.dars-ghost:active{color:var(--dars-ink);border-color:var(--dars-brand);background:color-mix(in srgb, var(--dars-brand) 10%, transparent)}.dars-flag{opacity:.7}.dars-eyebrow{color:var(--dars-brand);letter-spacing:.02em;margin:0 0 6px;font-size:13px}.dars-greet{color:var(--dars-ink);margin:0 0 10px;font-size:20px;font-weight:600}.dars-muted{color:var(--dars-muted)}.dars-fine{color:var(--dars-muted);margin-top:14px;font-size:12px}.dars-error{background:color-mix(in srgb, var(--dars-danger) 14%, transparent);border:1px solid var(--dars-danger);color:color-mix(in srgb, var(--dars-danger) 35%, var(--dars-ink));border-radius:10px;padding:10px 14px;font-size:14px}.dars-card,.dars-home,.dars-run,.dars-results,.dars-mistakes,.dars-progress-view{background:var(--dars-surface);border:1px solid var(--dars-line);box-shadow:var(--dars-shadow);border-radius:16px;padding:22px 18px}.dars-intro h1{margin:4px 0 8px;font-size:26px;line-height:1.3}.dars-intro-v2{width:min(100%,680px);margin-inline:auto;padding:clamp(20px,4vw,30px)}.dars-eyebrow-accent{border:1px solid color-mix(in srgb, var(--dars-brand) 40%, transparent);border-radius:var(--dars-r-pill);background:color-mix(in srgb, var(--dars-brand) 10%, transparent);align-items:center;gap:6px;padding:4px 10px;display:inline-flex}.dars-intro-sub{margin-bottom:18px;font-size:16px;line-height:1.75}.dars-intro-actions{border:1px solid var(--dars-line);border-radius:var(--dars-r-lg);background:linear-gradient(180deg, color-mix(in srgb, var(--dars-surface-2) 72%, transparent), transparent), var(--dars-surface-2);gap:10px;margin-top:20px;padding:12px;display:grid}.dars-intro-go{width:100%;min-height:56px;box-shadow:0 14px 30px -18px var(--dars-primary);border-radius:14px;font-size:16px}html[dir=ltr] .dars-intro-go:hover:not(:disabled) 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p{color:var(--dars-ink);margin:0;font-size:13px;line-height:1.6}.dars-save-icon{border-radius:var(--dars-r-pill);width:32px;height:32px;color:var(--dars-calm);background:color-mix(in srgb, var(--dars-calm) 14%, transparent);justify-content:center;align-items:center;display:inline-flex}.dars-save-email,.dars-oauth{justify-content:center;width:100%}.dars-intro-form .dars-save-email{white-space:nowrap;width:auto;min-width:126px;min-height:52px;padding-inline:14px}.dars-auth-group{gap:10px;display:grid}.dars-auth-divider{color:var(--dars-muted);grid-template-columns:1fr auto 1fr;align-items:center;gap:10px;margin:2px 0 0;font-size:12px;display:grid}.dars-auth-divider:before,.dars-auth-divider:after{content:"";background:var(--dars-line);height:1px}.dars-auth-options{gap:8px;display:grid}.dars-seg,.dars-modes{background:var(--dars-bg);border:1px solid var(--dars-line);border-radius:12px;gap:8px;padding:5px;display:flex}.dars-seg button,.dars-modes button{color:var(--dars-muted);background:0 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16px;display:flex}.dars-subject:hover:not(:disabled){border-color:var(--dars-brand)}.dars-subject:active:not(:disabled){border-color:var(--dars-brand);background:color-mix(in srgb, var(--dars-brand) 8%, transparent)}.dars-subject-ar{font-size:18px;font-weight:700}.dars-subject-meta{color:var(--dars-muted);font-size:12.5px}.dars-readiness{border:1px solid var(--dars-line);color:var(--dars-muted);border-radius:999px;align-items:center;gap:6px;margin-top:5px;padding:2px 9px;font-size:11.5px;font-weight:600;display:inline-flex}.dars-readiness:before{content:"";background:currentColor;border-radius:50%;width:7px;height:7px}.dars-readiness.is-ready{color:var(--dars-calm);border-color:color-mix(in srgb, var(--dars-calm) 45%, transparent);background:color-mix(in srgb, var(--dars-calm) 10%, transparent)}.dars-readiness.is-beta{color:var(--dars-brand);border-color:color-mix(in srgb, var(--dars-brand) 45%, transparent);background:color-mix(in srgb, var(--dars-brand) 10%, transparent)}.dars-readiness.is-building{color:var(--dars-muted)}.dars-run-head{color:var(--dars-muted);justify-content:space-between;align-items:center;font-size:13px;display:flex}.dars-timer{font-variant-numeric:tabular-nums;align-items:center;gap:5px;display:inline-flex}.dars-timer.is-low{color:var(--dars-danger);animation:1s ease-in-out infinite dars-timer-pulse}@keyframes dars-timer-pulse{50%{opacity:.5}}.dars-bar{background:var(--dars-line);border-radius:999px;height:4px;margin:10px 0 18px;overflow:hidden}.dars-bar span{background:var(--dars-brand);height:100%;transition:width .3s;display:block}.dars-stem{margin:0 0 18px;font-size:20px;line-height:1.5}html[dir=rtl] .dars-stem{font-size:21px;font-weight:600;line-height:1.75}html[dir=rtl] .dars-option{font-weight:500;line-height:1.7}html[dir=rtl] .dars-reveal-why{font-size:16px;font-weight:500;line-height:1.8}html[dir=rtl] .dars-explain-long{font-size:15px;line-height:1.8}html[dir=rtl] .dars-rich .dars-rich-p,html[dir=rtl] .dars-rich .dars-rich-list li{line-height:1.8}html[dir=rtl] .dars-intro h1{font-weight:700;line-height:1.4}.dars-math-run{white-space:nowrap;font-variant-numeric:tabular-nums;unicode-bidi:isolate;margin-inline:.04em;line-height:1.25;display:inline-block}.dars-options{gap:10px;margin:0;padding:0;list-style:none;display:grid}.dars-option{background:var(--dars-surface-2);border:1.5px solid var(--dars-line);width:100%;color:var(--dars-ink);text-align:start;border-radius:12px;justify-content:space-between;align-items:center;gap:10px;min-height:44px;padding:14px 16px;font-size:16px;transition:transform .12s,background-color .15s,border-color .15s;display:flex}.dars-option:hover:not(:disabled){border-color:var(--dars-brand)}.dars-option:active:not(:disabled){border-color:var(--dars-brand);background:color-mix(in srgb, var(--dars-brand) 10%, transparent);transform:scale(.97)}.dars-option.is-chosen{border-color:var(--dars-primary)}.dars-option.is-correct{border-color:var(--dars-ok);background:color-mix(in srgb, var(--dars-ok) 15%, transparent);color:color-mix(in srgb, var(--dars-ok) 35%, var(--dars-ink))}.dars-option.is-wrong{border-color:var(--dars-danger);background:color-mix(in srgb, var(--dars-danger) 14%, transparent)}.dars-rationale{color:var(--dars-muted);margin:4px 6px 0;font-size:13px}.dars-sample-q{border-top:1px solid var(--dars-line);margin-top:20px;padding-top:20px}.dars-sample-stem{color:var(--dars-ink);margin:0 0 12px;font-size:16px;font-weight:600;line-height:1.6}html[dir=rtl] .dars-sample-stem{font-size:17px;line-height:1.85}.dars-sample-options{gap:8px;margin:0 0 12px;padding:0;list-style:none;display:grid}.dars-sample-options li{background:var(--dars-surface-2);border:1.5px solid var(--dars-line);color:var(--dars-ink);border-radius:12px;justify-content:space-between;align-items:center;gap:10px;padding:12px 14px;font-size:15px;display:flex}.dars-sample-options li.is-correct{border-color:var(--dars-ok);background:color-mix(in srgb, var(--dars-ok) 15%, transparent);color:color-mix(in srgb, var(--dars-ok) 35%, var(--dars-ink));font-weight:600}.dars-sample-options li.is-correct svg{color:var(--dars-ok);flex-shrink:0}.dars-sample-why{border-inline-start:3px solid var(--dars-brand);background:color-mix(in srgb, var(--dars-brand) 8%, var(--dars-surface-2));color:var(--dars-ink);border-radius:12px;margin:0;padding:12px 14px;font-size:14px;line-height:1.75}.dars-reveal{border-top:1px solid var(--dars-line);gap:12px;margin-top:18px;padding-top:16px;display:grid}.dars-reveal-head{align-items:center;gap:8px;margin:0;font-size:15px;font-weight:800;display:flex}.dars-verdict-icon{border-radius:999px;flex:none;justify-content:center;align-items:center;width:26px;height:26px;display:inline-flex}.dars-verdict-icon.is-ok{color:#fff;background:var(--dars-ok)}.dars-verdict-icon.is-no{color:#fff;background:var(--dars-danger)}.dars-reveal.ok .dars-verdict-label{color:var(--dars-ok)}.dars-reveal.no .dars-verdict-label{color:color-mix(in srgb, var(--dars-danger) 45%, var(--dars-ink))}.dars-reveal-why{margin:0;font-size:15px;line-height:1.7}.dars-opt-icon{flex:none}.dars-opt-correct{color:var(--dars-ok)}.dars-opt-wrong{color:var(--dars-danger)}.dars-rich .dars-rich-p{margin:0 0 .55em}.dars-rich .dars-rich-p:last-child{margin-bottom:0}.dars-rich .dars-rich-list{gap:.3em;margin:.2em 0 .55em;padding-inline-start:1.35em;display:grid}.dars-rich .dars-rich-list li{line-height:1.65}.dars-rich strong{font-weight:800}.dars-code{font-family:var(--font-geist-mono,ui-monospace, monospace);background:var(--dars-surface-2);border:1px solid var(--dars-line);unicode-bidi:isolate;border-radius:6px;padding:.05em .4em;font-size:.92em}.dars-explain-long{font-size:14.5px;line-height:1.7}.dars-remedy{color:var(--dars-brand);align-items:center;gap:7px;margin:0;font-size:13.5px;display:inline-flex}.dars-run-foot{gap:10px;margin-top:18px;display:flex}.dars-score{align-items:baseline;gap:14px;display:flex}.dars-score-num{font-size:46px;font-weight:800;line-height:1}.dars-score-num small{color:var(--dars-muted);font-size:22px;font-weight:600}.dars-score-pct{color:var(--dars-brand);font-size:20px;font-weight:700}.dars-ready{margin:10px 0 18px;font-size:16px}.dars-topics{gap:7px;margin-bottom:18px;display:grid}.dars-topic{color:var(--dars-muted);border-bottom:1px dashed var(--dars-line);justify-content:space-between;padding-bottom:6px;font-size:13.5px;display:flex}.dars-topic-score{color:var(--dars-ink);font-variant-numeric:tabular-nums}.dars-review{gap:12px;margin:0 0 18px;padding:0;list-style:none;display:grid}.dars-review li{border-inline-start:3px solid var(--dars-line);padding-inline-start:12px}.dars-review li.ok{border-color:var(--dars-ok)}.dars-review li.no{border-color:var(--dars-danger)}.dars-review-stem{margin:0 0 4px;font-size:15px}.dars-review-why{color:var(--dars-muted);margin:0 0 5px;font-size:13.5px}.dars-review-why strong{color:var(--dars-ok)}.dars-sig{color:var(--dars-brand);text-align:center;margin:18px 0;font-size:17px}.dars-result-actions{gap:10px;display:grid}@media (min-width:620px){.dars-result-actions{grid-auto-flow:column;justify-content:start}}.dars-topbar-actions{align-items:center;gap:8px;display:flex}.dars-sb-toggle{top:calc(12px + env(safe-area-inset-top));z-index:84;background:var(--dars-surface);width:44px;height:44px;color:var(--dars-ink);border:1px solid var(--dars-line);box-shadow:var(--dars-shadow);border-radius:999px;justify-content:center;align-items:center;display:inline-flex;position:fixed;inset-inline-start:clamp(12px,4vw,20px)}.dars-sb-toggle:hover{border-color:var(--dars-brand)}.dars-sb-close{width:40px;height:40px;color:var(--dars-muted);border:1px solid var(--dars-line);background:0 0;border-radius:999px;justify-content:center;align-items:center;display:inline-flex}.dars-sb-close:hover{color:var(--dars-ink);border-color:var(--dars-brand)}.dars-sb-backdrop{z-index:85;opacity:0;pointer-events:none;background:#00000073;border:0;margin:0;padding:0;transition:opacity .18s;position:fixed;inset:0}.dars-sb-backdrop.is-open{opacity:1;pointer-events:auto}.dars-sidebar{z-index:var(--dars-z-rail);background:var(--dars-surface);border-inline-end:1px solid var(--dars-line);width:min(82vw,300px);box-shadow:var(--dars-shadow);padding:calc(14px + env(safe-area-inset-top)) 12px calc(16px + env(safe-area-inset-bottom));overscroll-behavior:contain;flex-direction:column;gap:4px;transition:transform .22s;display:flex;position:fixed;inset-block:0;inset-inline-start:0;overflow-y:auto}html[dir=ltr] .dars-sidebar{transform:translate(-110%)}html[dir=rtl] .dars-sidebar{transform:translate(110%)}html[dir=ltr] .dars-sidebar.is-open,html[dir=rtl] .dars-sidebar.is-open{transform:translate(0)}.dars-sb-head{border-bottom:1px solid var(--dars-line);justify-content:space-between;align-items:center;gap:8px;margin-bottom:4px;padding:4px 8px 12px;display:flex}.dars-sb-brand{color:var(--dars-ink);align-items:center;min-height:44px;display:inline-flex}.dars-sb-collapse{display:none}.dars-sb-nav{flex-direction:column;gap:2px;display:flex}.dars-sb-item{width:100%;color:var(--dars-ink);text-align:start;background:0 0;border:0;border-radius:10px;align-items:center;gap:11px;min-height:46px;padding:11px 12px;font-size:14.5px;text-decoration:none;display:flex}.dars-sb-item svg{color:var(--dars-muted);flex:none}.dars-sb-item:hover:not(:disabled){background:var(--dars-surface-2)}.dars-sb-item:disabled{opacity:.55;cursor:default}.dars-sb-item[aria-current=page]{background:color-mix(in srgb, var(--dars-primary) 14%, transparent);color:var(--dars-ink);font-weight:700}.dars-sb-item[aria-current=page] svg{color:var(--dars-primary)}.dars-sb-foot{border-top:1px solid var(--dars-line);flex-direction:column;gap:6px;margin-top:auto;padding-top:12px;display:flex}.dars-sb-tools{align-items:center;gap:8px;padding:0 4px 2px;display:flex}.dars-sb-locale{min-height:44px;color:var(--dars-muted);border:1px solid var(--dars-line);background:0 0;border-radius:999px;flex:1;align-items:center;gap:7px;padding:0 12px;font-size:13px;display:inline-flex}.dars-sb-locale:hover{color:var(--dars-ink);border-color:var(--dars-brand)}.dars-sb-signout,.dars-sb-signout svg{color:var(--dars-muted)}@media (min-width:880px){.dars-sb-toggle,.dars-sb-close,.dars-sb-backdrop{display:none}.dars-sidebar{z-index:1;width:264px;box-shadow:none;flex:0 0 264px;height:100%;transition:none;position:relative;inset:auto}html[dir=ltr] .dars-sidebar,html[dir=rtl] .dars-sidebar,html[dir=ltr] .dars-sidebar.is-open,html[dir=rtl] .dars-sidebar.is-open{transform:none}.dars-sb-collapse{min-width:36px;min-height:36px;color:var(--dars-muted);background:0 0;border:1px solid #0000;border-radius:9px;justify-content:center;align-items:center;display:inline-flex}.dars-sb-collapse:hover{color:var(--dars-ink);border-color:var(--dars-line)}.dars-sidebar.is-collapsed{flex-basis:76px;width:76px;padding-inline:10px}.dars-sidebar.is-collapsed .dars-sb-head{justify-content:center}.dars-sidebar.is-collapsed 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