@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:block))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,:before,:after,::backdrop{--tw-translate-x:0;--tw-translate-y:0;--tw-translate-z:0;--tw-scale-x:1;--tw-scale-y:1;--tw-scale-z:1;--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial;--tw-divide-y-reverse:0;--tw-border-style:solid;--tw-leading:initial;--tw-font-weight:initial;--tw-tracking:initial;--tw-shadow:0 0 #0000;--tw-shadow-color:initial;--tw-shadow-alpha:100%;--tw-inset-shadow:0 0 #0000;--tw-inset-shadow-color:initial;--tw-inset-shadow-alpha:100%;--tw-ring-color:initial;--tw-ring-shadow:0 0 #0000;--tw-inset-ring-color:initial;--tw-inset-ring-shadow:0 0 #0000;--tw-ring-inset:initial;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-offset-shadow:0 0 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1.25);--font-weight-normal:400;--font-weight-medium:500;--font-weight-semibold:600;--radius-lg:.5rem;--ease-out:cubic-bezier(0, 0, .2, 1);--default-transition-duration:.15s;--default-transition-timing-function:cubic-bezier(.4, 0, .2, 1)}}@layer base{*,:before,:after{box-sizing:border-box}html{scroll-padding-top:calc(var(--nav-height) + 24px);scrollbar-color:var(--field-border) var(--porcelain-quiet);-webkit-text-size-adjust:100%;overflow-x:clip}body{background:var(--ground);min-height:100dvh;color:var(--ink);font-family:var(--body);font-feature-settings:"cv11", "ss03";-webkit-font-smoothing:antialiased;caret-color:var(--blue);flex-direction:column;margin:0;font-size:1rem;font-weight:400;line-height:1.55;display:flex;overflow-x:clip}::selection{background:var(--blue-soft);color:var(--ink)}:focus-visible{outline:3px solid var(--blue);outline-offset:2px}a{color:inherit;text-decoration:none}p{text-wrap:pretty;margin:0}h1,h2,h3{color:inherit;overflow-wrap:break-word;text-wrap:balance;min-width:0;font-family:var(--display);letter-spacing:-.02em;font-synthesis:none;margin:0;font-weight:650;line-height:1.15}h3{font-size:1.125rem;font-weight:600;line-height:1.3}:lang(ar){font-family:var(--arabic);letter-spacing:0}:lang(ar) h1,:lang(ar) h2,h1 :lang(ar),h2 :lang(ar){letter-spacing:0}img,video{max-width:100%;height:auto;display:block}svg{flex-shrink:0;display:block}ul,ol{margin:0;padding:0;list-style:none}button,input,select,textarea{font:inherit;color:inherit}button,select{cursor:pointer}button{background:0 0;border:0}button,a,input,select{-webkit-tap-highlight-color:transparent}[hidden]{display:none!important}.num{font-variant-numeric:tabular-nums lining-nums}.sr-only{clip-path:inset(50%);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media 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700;font-display:swap;unicode-range:U+6??,U+750-77F,U+870-891,U+897-8E1,U+8E3-8FF,U+200C-200E,U+2010-2011,U+204F,U+2E41,U+FB50-FDFF,U+FE70-FE74,U+FE76-FEFC}[data-cycle]{--line:var(--field-border)}[data-cycle=primary]{--line:var(--line-primary)}[data-cycle=middle]{--line:var(--line-middle)}[data-cycle=secondary]{--line:var(--line-secondary)}.cycle-dot{background:var(--line,var(--field-border));border-radius:50%;flex-shrink:0;width:12px;height:12px;display:inline-block}.stop{justify-items:center;gap:4px;display:inline-grid}.stop i{border:1px solid var(--field-border);background:var(--porcelain);border-radius:50%;width:12px;height:12px;display:block}.stop.on i{border-color:var(--ok);background:var(--ok)}.skip-link{z-index:200;border-radius:var(--radius-control);background:var(--ink);color:var(--on-enamel);top:-100px;padding:12px 16px;font-weight:600;position:fixed;inset-inline-start:16px}.skip-link:focus{top:12px}.site-header{z-index:50;background:var(--porcelain);color:var(--ink);border-bottom:1px solid var(--rule);position:sticky;top:0}.header-inner{max-width:var(--container);height:var(--nav-height);padding-inline:var(--gutter);align-items:center;gap:24px;margin-inline:auto;display:flex}.brand{flex-shrink:0;display:block}.brand img{width:144px;height:auto}.tagline{color:var(--muted);white-space:nowrap;font-size:.9375rem;font-weight:600}.site-header nav{align-items:center;gap:4px;margin-inline-start:auto;display:flex}.nav-link{min-height:38px;color:var(--ink-2);transition:background var(--dur) var(--ease-out), color var(--dur) var(--ease-out);border:1px solid #0000;border-radius:8px;align-items:center;gap:8px;padding-inline:12px;font-size:.9375rem;font-weight:500;display:flex;position:relative}.nav-link svg{stroke-width:1.8px;width:18px;height:18px}.nav-link:hover,.nav-link.active{background:var(--tint);color:var(--ink)}.soon-tag{background:var(--tint);height:20px;color:var(--ink-2);border:1px solid var(--rule);border-radius:999px;align-items:center;padding-inline:8px;font-size:.6875rem;font-weight:700;line-height:1;display:inline-flex}.lang-switch{flex-shrink:0;position:relative}.lang-switch[aria-busy=true]{opacity:.7}.lang-trigger{border:1px solid var(--field-border);background:var(--porcelain);min-height:38px;color:var(--ink-2);transition:background var(--dur) var(--ease-out);border-radius:8px;align-items:center;gap:8px;padding:0 10px;font-size:.875rem;font-weight:600;display:inline-flex}.lang-trigger:hover,.lang-trigger[aria-expanded=true]{background:var(--tint)}.lang-trigger .chevron,.level-trigger .chevron{color:currentColor;transition:rotate var(--dur) var(--ease-out)}[aria-expanded=true]>.chevron{rotate:180deg}.flag{width:21px;height:14px;box-shadow:0 0 0 1px var(--rule);border-radius:3px}.lang-menu{z-index:70;background:var(--porcelain);min-width:200px;color:var(--ink);box-shadow:0 0 0 1px var(--rule), var(--shadow-pop);animation:menu-in .16s var(--ease-out);inset-inline-end:0;border-radius:12px;padding:8px;position:absolute;top:calc(100% + 8px)}.lang-menu button{text-align:start;border:1px solid #0000;border-radius:12px;grid-template-columns:auto 2.25rem 1fr;align-items:center;gap:10px;width:100%;min-height:44px;padding:0 12px;display:grid}.lang-menu button:hover,.lang-menu button:focus-visible{background:var(--tint);outline:none}.lang-menu button[aria-checked=true]{border-color:var(--blue-border);background:var(--blue-soft);color:var(--blue-ink)}.lang-code{color:inherit;opacity:.8;font-size:.8125rem;font-weight:600}.lang-menu .lang-code:lang(ar),.lang-menu .lang-name:lang(ar){font-family:var(--arabic);letter-spacing:0}.lang-name{text-align:start;font-size:1rem;font-weight:700}@keyframes menu-in{0%{opacity:0;translate:0 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svg{stroke-width:2.2px;width:20px;height:20px;transition:transform var(--dur) var(--ease-out)}.text-link:hover{text-underline-offset:.3em;text-decoration:underline;text-decoration-thickness:2px}.text-link:hover svg{transform:translate(3px)}.text-link.on-dark{color:var(--blue-ink)}label{color:var(--ink-2);font-size:.8125rem;font-weight:500}input[type=search],select{border:1px solid var(--field-edge);border-radius:var(--radius-control);background:var(--porcelain);width:100%;min-height:44px;color:var(--ink);transition:border-color var(--dur) var(--ease-out), background var(--dur) var(--ease-out);padding:0 12px;font-size:.9375rem;font-weight:400}select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none' stroke='%231d2025' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m1 1.5 5 5 5-5'/%3E%3C/svg%3E");background-position:right 14px 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.mascot-body{animation:mascot-in .52s var(--ease-out) both, mascot-hop .7s ease-in-out .52s infinite}.mascot[data-state=success] .mascot-body{animation:mascot-jump .56s var(--ease-out) 2, mascot-idle 3.2s ease-in-out 1.12s infinite}.mascot[data-state=error] .mascot-body{animation:mascot-in .52s var(--ease-out) both, mascot-shake .48s ease-in-out .52s, mascot-idle 3.2s ease-in-out 1s infinite}.mascot[data-enter=no] .mascot-body{animation:3.2s ease-in-out infinite mascot-idle}.mascot-prop{transform-box:fill-box;transform-origin:50%;animation:2s ease-in-out infinite mascot-float}.mascot[data-state=success] .mascot-prop{animation:mascot-confetti .9s var(--ease-out) both}}@keyframes mascot-hop{0%,to{translate:0}40%{translate:0 -10px;rotate:-3deg}60%{translate:0 -10px;rotate:3deg}}@keyframes mascot-in{0%{opacity:0;translate:0 24px;scale:calc(var(--s,1) * .9)}}@keyframes mascot-idle{50%{translate:0 -3px}}@keyframes mascot-blink{0%,94%,to{scale:1}97%{scale:1 .1}}@keyframes mascot-pop{0%{opacity:0;scale:0}}@keyframes mascot-jump{0%,to{translate:0}45%{translate:0 -14px}}@keyframes mascot-shake{0%,to{translate:0}25%,75%{translate:-3px}50%{translate:3px}}@keyframes mascot-float{50%{translate:0 -3px}}@keyframes mascot-confetti{0%{opacity:0;translate:0 14px;scale:.6}}.avatar-editor{grid-template-columns:200px minmax(0,1fr);display:grid}.avatar-stage{border-inline-end:1px solid var(--rule);background:var(--sky);place-items:center;padding:28px 24px 24px;display:grid}.avatar-stage .mascot{width:136px;margin-bottom:0}.avatar-options{gap:16px;padding:24px;display:grid}.avatar-row{grid-template-columns:88px minmax(0,1fr);align-items:center;gap:8px 16px;display:grid}.swatch,.character{cursor:pointer;position:relative}.swatch input,.character input{opacity:0;cursor:pointer;width:100%;height:100%;margin:0;position:absolute;inset:0}.swatch{width:36px;height:36px;display:block}.swatch span{background:var(--swatch);width:100%;height:100%;transition:box-shadow var(--dur) var(--ease-out), scale var(--dur) var(--ease-out);border:1px solid #10182833;border-radius:50%;display:block}.swatch:hover span{scale:1.08}.swatch input:checked+span{box-shadow:0 0 0 2px var(--porcelain), 0 0 0 4px var(--blue)}.swatch input:focus-visible+span{outline:3px solid var(--blue);outline-offset:5px}.character{border:1px solid var(--field-border);border-radius:var(--radius-control);background:var(--porcelain);min-height:64px;transition:background var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out);align-items:center;gap:10px;padding:6px 16px 6px 10px;font-size:.9375rem;font-weight:600;display:inline-flex}.character:hover{background:var(--tint)}.character:has(input:checked){border-color:var(--blue);background:var(--blue-soft);color:var(--blue-ink)}.character:has(input:focus-visible){outline:3px solid var(--blue);outline-offset:2px}.character .mascot{width:30px;margin-bottom:0}.character .mascot-body,.character .mascot-eyes,.character .mascot-exam,.character 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14px}.level-trigger>svg:first-child{color:var(--blue)}.level-trigger[aria-expanded=true],.level-trigger:hover{background:var(--blue-soft)}.level-step{padding-inline:12px}.level-step span{text-align:center;min-width:2.6em}.level-step:after{content:"";background:var(--line);border-radius:50%;order:3;width:10px;height:10px}.level-step.next{flex-direction:row-reverse}.level-step.next:after{order:-1}.level-step.next .step-chevron,[dir=rtl] .level-step.previous .step-chevron{rotate:180deg}[dir=rtl] .level-step.next .step-chevron{rotate:0deg}a.level-step:hover{background:var(--blue-soft)}a.level-step.previous:hover{translate:-2px}a.level-step.next:hover,[dir=rtl] a.level-step.previous:hover{translate:2px}[dir=rtl] a.level-step.next:hover{translate:-2px}.level-step[data-disabled]{opacity:.4}.level-step[data-disabled]:after{display:none}.level-picker{z-index:70;background:var(--porcelain);width:min(360px,100%);color:var(--ink);box-shadow:0 0 0 1px var(--rule), var(--shadow-pop);animation:menu-in .16s var(--ease-out);inset-inline-start:0;border-radius:14px;gap:14px;padding:16px;display:grid;position:absolute;top:calc(100% + 10px)}.level-picker h2{font-family:var(--body);color:var(--ink-2);align-items:center;gap:8px;margin-bottom:8px;font-size:.8125rem;font-weight:600;display:flex}.level-picker ul{flex-wrap:wrap;gap:6px;display:flex}.level-picker a{border:1px solid var(--rule);min-width:56px;min-height:44px;transition:background var(--dur) var(--ease-out);border-radius:12px;place-items:center;padding:0 10px;font-weight:600;display:inline-grid}.level-picker a:hover,.level-picker a:focus-visible{background:var(--tint);outline:none}.level-picker a[aria-current=true]{border-color:var(--line);background:var(--line)}@supports (color:color-mix(in lab, red, red)){.level-picker a[aria-current=true]{background:color-mix(in srgb, var(--line) 18%, var(--porcelain))}}.page-head{padding-block:48px 44px}.page-head h1{font-size:clamp(2.25rem,4.4vw,3.25rem);line-height:1.05}.page-head h1 [lang=ar]{color:var(--ink-2);vertical-align:middle;margin-inline-start:12px;font-size:.5em;font-weight:700;display:inline-block}.page-head .lead{max-width:52ch;color:var(--ink-2);margin-top:12px;font-size:1.0625rem}.page-head .button{margin-top:28px}.welcome-inner{padding-block:48px 56px}.welcome h1{font-size:clamp(2rem,4.4vw,3rem);line-height:1.05}.welcome .lead{max-width:54ch;color:var(--ink-2);margin-top:12px;font-size:1.0625rem;line-height:1.55}.welcome-cycles{grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr));gap:16px;margin-top:32px;display:grid}.welcome-cycle{border:1px solid var(--rule);border-radius:var(--radius-sheet);background:var(--porcelain);padding:18px}.welcome-cycle h2{font-family:var(--body);flex-wrap:wrap;align-items:center;gap:4px 10px;margin-bottom:14px;font-size:1rem;font-weight:600;display:flex}.welcome-cycle h2 [lang=ar]{color:var(--ink-2);font-weight:500}.welcome-cycle ul{gap:8px;display:grid}.welcome-level{border:1px solid var(--rule);border-inline-start:4px solid var(--line);min-height:52px;transition:background var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out);border-radius:10px;align-items:center;gap:14px;padding:8px 14px;display:flex}.welcome-level:hover,.welcome-level:focus-visible{background:var(--tint);border-color:var(--line);outline:none}.welcome-level:focus-visible{box-shadow:0 0 0 3px var(--blue-soft)}.welcome-code{font-variant-numeric:tabular-nums;min-width:3.2em;font-size:1.0625rem;font-weight:700}.welcome-name{color:var(--ink-2);line-height:1.3}.welcome-level.exam{background:var(--line)}@supports (color:color-mix(in lab, red, red)){.welcome-level.exam{background:color-mix(in srgb, var(--line) 10%, var(--porcelain))}}.welcome-later{color:var(--muted);margin-top:20px;font-size:.9375rem}.home-head{grid-template-columns:minmax(0,5fr) minmax(0,6fr);align-items:end;gap:32px 72px;padding-block:36px 32px;display:grid}.home-search .lead{max-width:48ch;color:var(--ink-2);font-size:1.0625rem;line-height:1.55}.search-form{border:1px solid var(--field-edge);background:var(--porcelain);box-shadow:var(--shadow-hairline);color:var(--ink);transition:border-color var(--dur) var(--ease-out);border-radius:12px;align-items:center;gap:8px;margin-top:18px;padding:5px;padding-inline-start:14px;display:flex}.search-form:focus-within{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-soft)}.search-form>svg{color:var(--ink-2);stroke-width:2.2px}.search-form input[type=search]{background:0 0;border:0;flex:1;min-width:0;padding-inline:4px;font-size:1.0625rem}.search-form input[type=search]:focus-visible{outline:none}.search-form .button{min-height:44px;padding-inline:20px}.line-wrap{padding-block:8px 28px}.line-scroll{margin-inline:calc(-1 * var(--gutter));padding-top:28px;padding-inline:var(--gutter);scrollbar-width:thin;scrollbar-color:var(--sky-border) transparent;overflow-x:auto}.line-map{width:100%;min-width:calc(var(--w) * .78px);aspect-ratio:var(--w) / var(--h);position:relative}.line-track{width:100%;height:100%;position:absolute;inset:0;overflow:visible}.line-track path{fill:none;stroke:var(--line);stroke-width:6px;opacity:.4;stroke-linecap:round;stroke-linejoin:round;transition:stroke-width var(--dur) var(--ease-out), opacity var(--dur) var(--ease-out)}.line-track path[data-current]{stroke-width:8px;opacity:1}.line-map:has(.station:hover,.station:focus-visible) .line-track path{opacity:.3;stroke-width:6px}:is(.line-map:has(.station[data-cycle=primary]:hover,.station[data-cycle=primary]:focus-visible) path[data-cycle=primary],.line-map:has(.station[data-cycle=middle]:hover,.station[data-cycle=middle]:focus-visible) path[data-cycle=middle],.line-map:has(.station[data-cycle=secondary]:hover,.station[data-cycle=secondary]:focus-visible) path[data-cycle=secondary]){opacity:1;stroke-width:8px}.line-label{white-space:nowrap;width:max-content;color:var(--ink-2);flex-wrap:nowrap;align-items:center;gap:2px 10px;font-size:.8125rem;font-weight:500;display:flex;position:absolute;translate:-12px calc(-100% - 26px)}.line-label:before{content:"";background:var(--line);border-radius:2px;width:14px;height:4px}.line-label [lang=ar]{color:var(--ink-2);text-transform:none;letter-spacing:0;font-size:.8125rem;font-weight:500}.line-map ol li{position:absolute;translate:-50% -22px}.station{width:64px;color:var(--ink-2);outline-offset:-2px;border-radius:12px;justify-items:center;display:grid;position:relative}.station .tick{place-items:center;width:44px;height:44px;display:grid;position:relative}.station .tick:before{content:"";background:var(--porcelain);border:3px solid var(--line);width:16px;height:16px;transition:transform var(--dur) var(--ease-out);border-radius:50%}.station.exam .tick:before{border-width:5px;width:22px;height:22px}.station .code{font-variant-numeric:tabular-nums;transition:color var(--dur) var(--ease-out);margin-top:2px;font-size:.875rem;font-weight:500}.station .name{background:var(--ink);color:var(--on-enamel);white-space:nowrap;opacity:0;pointer-events:none;transition:opacity var(--dur) var(--ease-out), translate var(--dur) var(--ease-out);border-radius:8px;padding:4px 10px;font-size:.875rem;font-weight:700;position:absolute;bottom:calc(100% - 2px);left:50%;translate:-50% 4px}.station:hover .code,.station:focus-visible .code{color:var(--ink)}.station:hover .tick:before,.station:focus-visible .tick:before{transform:scale(1.25)}.station:hover .name,.station:focus-visible .name{opacity:1;translate:-50%}.station[aria-current=true] .code{color:var(--blue-ink);font-weight:650}.station[aria-current=true] .tick:before{background:var(--blue);border-color:var(--porcelain);box-shadow:0 0 0 3px var(--blue)}.station[aria-current=true] .tick svg{width:44px;height:44px;position:absolute;inset:0;rotate:-90deg}.station[aria-current=true] .tick circle{fill:none;stroke:var(--blue);stroke-width:2.5px;stroke-dasharray:101;stroke-dashoffset:0;animation:ring-in .9s var(--ease-out) .2s both}@keyframes ring-in{0%{stroke-dashoffset:101px}}.desk{padding-block:44px 72px}.desk.narrow{width:min(100% - 2 * var(--gutter), 760px)}.desk-head{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:8px 24px;margin-bottom:18px;display:flex}.desk-head h2{font-size:clamp(1.5rem,2.6vw,1.875rem)}.desk-head p{color:var(--muted);margin-inline-start:auto;font-weight:500}.desk-figures{font-variant-numeric:tabular-nums;gap:16px;display:flex}.board-wrap{border:1px solid var(--rule);border-radius:var(--radius-sheet);background:var(--porcelain);overflow:clip}.board{border-collapse:collapse;width:100%}.board thead th{border-bottom:1px solid var(--rule);background:var(--porcelain-quiet);color:var(--muted);text-align:center;white-space:nowrap;padding:12px 8px;font-size:.8125rem;font-weight:600}.board abbr{text-decoration:none}.board .board-subject-head{text-align:start;padding-inline-start:20px}.board .board-total-head{text-align:end;padding-inline-end:56px}.board .board-total-head:first-letter{text-transform:uppercase}.board tbody tr{transition:background var(--dur) var(--ease-out);position:relative}.board tbody tr+tr{border-top:1px solid var(--rule)}.board tbody tr:hover{background:var(--porcelain-quiet)}.board-subject{text-align:start;padding:8px 16px 8px 12px;font-weight:400}.board-link{align-items:center;gap:14px;min-height:52px;display:flex}.board-link:after{content:"";position:absolute;inset:0}.board-link:focus-visible{outline:none}.board tbody tr:has(.board-link:focus-visible){outline:3px solid var(--blue);outline-offset:-3px}.board-link .subject-art{flex:none;width:44px;height:44px}.board tbody tr:hover .subject-name{color:var(--blue-ink)}.board-stop{text-align:center;width:76px;padding:8px}.board-stop .num{font-variant-numeric:tabular-nums;background:var(--tint);min-width:34px;height:30px;color:var(--ink);border-radius:8px;place-items:center;padding-inline:8px;font-size:.9375rem;font-weight:600;display:inline-grid}.board-none:before{content:"–";color:var(--field-border-hover);font-weight:500}.board-total{text-align:end;white-space:nowrap;width:1%;padding:8px 56px 8px 16px;position:relative}.board-total strong{font-size:1.25rem;font-weight:650;line-height:1.1;display:block}.board-total small{color:var(--ok-ink);margin-top:2px;font-size:.8125rem;font-weight:600;display:block}.board-total svg{color:var(--muted);stroke-width:2.2px;transition:transform var(--dur) var(--ease-out), color var(--dur) var(--ease-out);inset-inline-end:20px;position:absolute;top:50%;translate:0 -50%}.board tbody tr:hover .board-total svg{color:var(--blue-ink);transform:translate(4px)}[dir=rtl] .board tbody tr:hover .board-total svg{transform:translate(-4px)}.levels{border-top:1px solid var(--sky-border);border-bottom:0}.levels .band-inner{padding-block:40px 8px}.levels h2{font-size:1.25rem}.sheet{border:1px solid var(--rule);border-radius:var(--radius-sheet);background:var(--porcelain);overflow:clip}.subject-list{border:1px solid var(--rule);border-radius:var(--radius-sheet);background:var(--porcelain);grid-template-columns:repeat(2,minmax(0,1fr));column-gap:40px;padding:4px 24px;display:grid}.subject-list li{border-bottom:1px solid var(--rule)}.subject-list li:last-child,.subject-list li:nth-last-child(2):nth-child(odd){border-bottom:0}.subject-row{grid-template-columns:52px minmax(0,1fr) auto 7.5rem 20px;align-items:center;gap:18px;min-height:80px;padding-block:12px;display:grid}.subject-row>svg{color:var(--muted);stroke-width:2.2px;transition:transform var(--dur) var(--ease-out), color var(--dur) var(--ease-out)}.subject-name{font-family:var(--display);text-align:left;transition:color var(--dur) var(--ease-out);font-size:1.0625rem;font-weight:600;line-height:1.25}.subject-row:hover .subject-name{color:var(--blue-ink)}.subject-row:hover>svg{color:var(--blue-ink);transform:translate(4px)}.stops{gap:14px;display:flex;position:relative}.book{--hue:var(--hue-default);width:120px;display:block;overflow:visible}.book-ground{fill:var(--sky-border);transform-box:fill-box;transform-origin:50%;transition:scale .22s var(--ease-out), opacity .22s var(--ease-out)}.book-lift,.book-body{transform-box:view-box;transform-origin:60px 60px}.book-lift{rotate:var(--tilt,0deg);transition:translate .22s var(--ease-out), rotate .22s var(--ease-out)}.book-cover,.book-spine{fill:var(--hue)}@supports (color:color-mix(in lab, red, red)){.book-spine{fill:color-mix(in srgb, var(--hue) 80%, #1d2025)}}.book-under{fill:var(--hue)}@supports (color:color-mix(in lab, red, red)){.book-under{fill:color-mix(in srgb, var(--hue) 62%, #1d2025)}}.book-band,.book-dot{fill:var(--hue)}@supports (color:color-mix(in lab, red, red)){.book-band,.book-dot{fill:color-mix(in srgb, var(--hue) 42%, #fff)}}.book-pages{fill:#fff8e7}.book-leaf{fill:none;stroke:#ecdcb8;stroke-width:1.4px}.book-mark{fill:#ef4b6c;transform-box:fill-box;transform-origin:top}.book-link:hover .book-lift,.book-link:focus-visible .book-lift{translate:0 -7px;rotate:calc(var(--tilt,0deg) * -1)}.book-link:hover .book-ground,.book-link:focus-visible .book-ground{opacity:.7;scale:.82 1}@media (prefers-reduced-motion:no-preference){.book-body{animation:book-drop .48s var(--ease-out) calc(var(--i,0) * 70ms) both, book-float 3.6s ease-in-out calc(.7s + var(--i,0) * .26s) infinite}.book-link:hover .book-mark,.book-link:focus-visible .book-mark{animation:book-flick .52s var(--ease-out)}}@keyframes book-drop{0%{opacity:0;translate:0 -30px;rotate:-9deg}70%{translate:0 2px}}@keyframes book-float{50%{translate:0 -3px}}@keyframes book-flick{30%{rotate:14deg}60%{rotate:-8deg}}.subject-art{--hue:var(--hue-default);background:var(--hue);border-radius:10px;width:48px;height:48px;display:block;overflow:clip}@supports (color:color-mix(in lab, red, red)){.subject-art{background:color-mix(in srgb, var(--hue) 16%, white)}}.subject-art img{object-fit:cover;width:100%;height:100%;transition:scale .6s var(--ease-out)}.subject-row:hover .subject-art img,.subject-row:focus-visible .subject-art img{scale:1.06}.subject-art[data-art=math]{--hue:var(--hue-math)}.subject-art[data-art=calculator]{--hue:var(--hue-calculator)}.subject-art[data-art=physics]{--hue:var(--hue-physics)}.subject-art[data-art=science]{--hue:var(--hue-science)}.subject-art[data-art=arabic]{--hue:var(--hue-arabic)}.subject-art[data-art=french]{--hue:var(--hue-french)}.subject-art[data-art=english]{--hue:var(--hue-english)}.subject-art[data-art=history]{--hue:var(--hue-history)}.subject-art[data-art=islamic]{--hue:var(--hue-islamic)}.subject-art[data-art=civic]{--hue:var(--hue-civic)}.subject-art[data-art=computing]{--hue:var(--hue-computing)}.subject-art[data-art=amazigh]{--hue:var(--hue-amazigh)}.subject-art[data-art=philosophy]{--hue:var(--hue-philosophy)}.subject-art[data-art=art]{--hue:var(--hue-art)}.subject-art[data-art=music]{--hue:var(--hue-music)}.subject-art[data-art=sport]{--hue:var(--hue-sport)}.subject-art[data-art=book]{--hue:var(--hue-book)}.subject-list.grid{background:0 0;border:0;grid-template-columns:repeat(auto-fill,minmax(232px,1fr));gap:16px;padding:0}.subject-list.grid li,.subject-list.grid li:nth-last-child(2):nth-child(odd){border:0}.subject-list.grid .subject-row{border:1px solid var(--rule);border-radius:var(--radius-sheet);background:var(--porcelain);height:100%;min-height:0;transition:background var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out);grid-template:"art art""name name""stops stops""count arrow"1fr/minmax(0,1fr) 20px;align-items:end;gap:12px 8px;padding:8px 8px 16px}.subject-list.grid .subject-row:hover,.subject-list.grid .subject-row:focus-visible{border-color:var(--field-border);box-shadow:var(--shadow-lift)}.subject-list.grid .subject-art{aspect-ratio:16/10;border-radius:8px;grid-area:art;width:100%;height:auto}.subject-list.grid .subject-name{text-wrap:balance;-webkit-hyphens:auto;hyphens:auto;grid-area:name;padding:2px 10px 0;font-size:1.125rem}.subject-list.grid .stops{grid-area:stops;margin-inline:10px}.subject-list.grid .subject-count{text-align:start;grid-area:count;justify-items:start;padding-inline-start:10px;display:block}.subject-list.grid .subject-count strong{vertical-align:-1px;margin-inline-end:4px}.subject-list.grid .subject-count small{margin-top:2px}.subject-list.grid .subject-row>svg:last-child{margin-inline-end:10px;grid-area:arrow;margin-bottom:4px}.view-switch{border:1px solid var(--rule);background:var(--porcelain);border-radius:14px;gap:4px;padding:4px;display:inline-flex}.view-switch a{min-height:38px;color:var(--ink-2);transition:background var(--dur) var(--ease-out), color var(--dur) var(--ease-out);border:1px solid #0000;border-radius:10px;align-items:center;gap:6px;padding:0 12px;font-size:.8125rem;font-weight:600;display:inline-flex}.view-switch a svg{stroke-width:2.2px;width:16px;height:16px}.view-switch a:hover{color:var(--ink);background:var(--tint)}.view-switch 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16px;margin-top:16px;padding-inline:20px;font-size:.9375rem;font-weight:500;display:flex}.subject-empty strong{color:var(--ink-2);font-size:.875rem;font-weight:600}.subject-empty ul{flex-wrap:wrap;gap:4px 16px;display:flex}.interchange{border:1px solid var(--blue-border);border-radius:var(--radius-sheet);background:var(--blue-soft);color:var(--ink);transition:background var(--dur) var(--ease-out);grid-template-columns:auto minmax(0,1fr) auto auto;align-items:center;gap:4px 18px;margin-top:16px;padding:18px 22px;display:grid}.interchange:hover{background:var(--blue-soft-hover)}.interchange-ring{background:var(--porcelain);border:6px solid var(--blue);border-radius:50%;width:24px;height:24px}.interchange-text{display:grid}.interchange-text strong{font-family:var(--display);font-size:1.125rem;font-weight:600}.interchange-text span{color:var(--ink-2);font-size:.9375rem;font-weight:600}.interchange-ar{color:var(--ink-2);text-align:end;font-size:.9375rem}.interchange svg{color:var(--blue-ink);stroke-width:2.2px;transition:transform var(--dur) var(--ease-out)}.interchange:hover svg{transform:translate(4px)}.desk-foot{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 24px;margin-top:14px;display:flex}.legend{color:var(--ink-2);flex-wrap:wrap;align-items:center;gap:6px 10px;font-size:.9375rem;font-weight:600;display:flex}.legend .stop+*{margin-inline-end:10px}.library-head{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:16px 32px;padding-block:28px 20px;display:flex}.library-head .mascot{width:64px}.library-head .station-sign:has(>.mascot){gap:0 16px}.library-head .sign-code{font-size:clamp(2.25rem,4vw,2.75rem)}.library-head .sign-name{font-size:1.0625rem}.library-head .sign-cycle{margin-top:8px}.library-band .band-inner:last-child{padding-bottom:24px}.filter-bar{grid-template-columns:repeat(3,minmax(0,1fr)) auto;grid-template-areas:"search search search go""level subject term check";align-items:end;gap:12px 16px;display:grid}.filter-bar.has-rail{grid-template-columns:minmax(0,1.5fr) minmax(240px,1fr) minmax(0,1fr) auto auto;grid-template-areas:"search level term check go"}.filter-bar.has-rail>div:has(#subject){display:none}.filter-bar>div{gap:6px;min-width:0;display:grid}.filter-bar .filter-search{grid-area:search}.filter-bar>div:has(#level){grid-area:level}.filter-bar>div:has(#subject){grid-area:subject}.filter-bar>div:has(#term){grid-area:term}.filter-bar .checkbox{grid-area:check}.filter-bar .button{grid-area:go}.field-icon{display:block;position:relative}.field-icon svg{width:20px;height:20px;color:var(--ink-2);stroke-width:2.2px;pointer-events:none;inset-inline-start:14px;position:absolute;top:50%;translate:0 -50%}.field-icon input{padding-inline-start:44px}.checkbox{min-height:44px;color:var(--ink);font-family:var(--body);letter-spacing:0;text-transform:none;cursor:pointer;white-space:nowrap;align-items:center;gap:10px;padding-inline:4px;font-size:.9375rem;font-weight:500;display:flex}.checkbox input{width:18px;height:18px;accent-color:var(--go);cursor:pointer;margin:0}.library-desk{padding-block:32px 72px}.library-desk.has-rail{grid-template-columns:200px minmax(0,1fr);align-items:start;gap:32px;display:grid}.subject-chips{top:calc(var(--nav-height) + 24px);max-height:calc(100dvh - var(--nav-height) - 48px);scrollbar-width:thin;position:sticky;overflow-y:auto}.subject-chips ul{gap:2px;display:grid}.subject-chip{min-height:44px;color:var(--ink-2);transition:background var(--dur) var(--ease-out), color var(--dur) var(--ease-out);border-radius:8px;grid-template-columns:28px minmax(0,1fr) auto;align-items:center;gap:10px;padding:6px 10px 6px 8px;font-size:.9375rem;font-weight:500;display:grid}.subject-chip-tile{background:var(--tint);width:28px;height:28px;color:var(--ink-2);border-radius:6px;place-items:center;display:grid}.subject-chip-tile svg{stroke-width:1.8px;width:16px;height:16px}.subject-chip[aria-current=true] .subject-chip-tile{background:var(--porcelain);color:var(--blue-ink)}.subject-chip.all{grid-template-columns:28px minmax(0,1fr)}.subject-chip .subject-art{border-radius:6px;width:28px;height:28px}.subject-chip-name{overflow-wrap:break-word;text-align:left;justify-self:start;min-width:0;max-width:100%;line-height:1.3}[dir=rtl] .subject-chip-name{text-align:right}.subject-chip-count{color:var(--muted);font-variant-numeric:tabular-nums;font-size:.8125rem;font-weight:500}.subject-chip:hover{background:var(--tint);color:var(--ink)}.subject-chip[aria-current=true]{background:var(--blue-soft);color:var(--blue-ink);font-weight:600}.subject-chip[aria-current=true] .subject-chip-count{color:var(--blue-ink)}.results{min-width:0}.results .desk-head{margin-bottom:12px}.active-filters{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:20px;display:flex}.filter-chip{border:1px solid var(--blue-border);background:var(--blue-soft);min-height:36px;color:var(--blue-ink);transition:background var(--dur) var(--ease-out);border-radius:8px;align-items:center;gap:6px;padding:0 8px 0 12px;font-size:.875rem;font-weight:500;display:inline-flex}.filter-chip svg{stroke-width:2.4px;width:16px;height:16px}.filter-chip:hover{background:var(--blue-soft-hover)}.clear-filters{min-height:40px;color:var(--blue-ink);align-items:center;padding-inline:8px;font-weight:600;display:inline-flex}.clear-filters:hover{text-underline-offset:.3em;text-decoration:underline}.paper-list{gap:36px;display:grid}.paper-group-head{border-bottom:1px solid var(--field-border);flex-wrap:wrap;align-items:center;gap:4px 12px;min-height:52px;padding:8px 8px 10px;font-size:1.0625rem;font-weight:600;display:flex}.paper-group-head .subject-art{border-radius:7px;width:32px;height:32px}.paper-group-count{color:var(--muted);font-family:var(--body);font-variant-numeric:tabular-nums;margin-inline-start:auto;font-size:.875rem;font-weight:500}.paper{border-bottom:1px solid var(--rule);transition:background var(--dur) var(--ease-out);grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:4px 16px;padding:8px;display:grid}.paper:hover{background:var(--sky)}.paper-main{gap:2px;min-width:0;display:grid}.paper h4{overflow-wrap:anywhere;margin:0;font-size:.9375rem;font-weight:600;line-height:1.4}.paper-title{min-height:40px;color:var(--ink);text-align:start;align-items:center;gap:12px;padding:0;font-weight:600;display:inline-flex}.paper-tile{background:var(--tint);width:32px;height:32px;color:var(--ink-2);border-radius:8px;flex:none;place-items:center;display:grid}.paper-tile svg{stroke-width:1.7px;width:18px;height:18px}.paper-tile[data-solution]{background:var(--ok-soft);color:var(--ok-ink)}.paper-title-text{transition:color var(--dur) var(--ease-out)}.paper-title:hover .paper-title-text{color:var(--blue-ink)}.paper-meta{color:var(--muted);flex-wrap:wrap;align-items:center;gap:2px 16px;padding-inline-start:44px;font-size:.8125rem;font-weight:500;display:flex}.paper-meta .solution{align-items:center;gap:4px;display:inline-flex}.paper-meta .solution.yes{color:var(--ok-ink);font-weight:600}.paper-meta .solution svg{stroke-width:2.6px;width:14px;height:14px}.paper-actions{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:8px;display:flex}.paper-actions .button{min-height:40px;box-shadow:none;padding-inline:12px;font-size:.875rem}.paper-actions .button.quiet{width:40px;padding:0}.paper-actions .button.quiet:disabled{width:auto;padding-inline:12px}.paper-actions .button.quiet:not(:disabled) .download-label{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.action-message{text-align:end;color:var(--ink-2);flex-basis:100%;font-size:.875rem;font-weight:600}@media (min-width:75rem){.paper-main{grid-template-columns:minmax(0,1fr) 104px 92px 112px;align-items:center;column-gap:12px}.paper-tile{display:none}.paper-title{min-height:44px}.paper-main>h4{grid-area:1/1}.paper-meta{display:contents}.meta-term{grid-area:1/2}.meta-year{grid-area:1/3}.paper-meta .solution{grid-area:1/4}}.pagination{grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;margin-top:28px;display:grid}.pagination>:last-child{justify-self:end}.pagination p{justify-items:center;font-weight:600;display:grid}.pagination p span:last-child{color:var(--ink-2);font-size:.9375rem;font-weight:600}@media (max-width:75rem){.filter-bar:not(.has-rail){grid-template-columns:repeat(3,minmax(0,1fr));grid-template-areas:"search search search""level subject term""check check go"}}@media (max-width:60rem){.filter-bar.has-rail{grid-template-columns:repeat(2,minmax(0,1fr)) auto;grid-template-areas:"search search go""level term check"}.library-desk.has-rail{display:block}.subject-chips{max-height:none;margin-inline:calc(-1 * var(--gutter));margin-bottom:24px;position:static;overflow:visible}.subject-chips ul{padding:2px var(--gutter) 6px;scroll-padding-inline:var(--gutter);scrollbar-width:none;gap:8px;display:flex;overflow-x:auto}.subject-chips ul::-webkit-scrollbar{display:none}.subject-chip{border:1px solid var(--rule);background:var(--porcelain);white-space:nowrap;flex:none;padding:4px 12px 4px 4px;display:inline-flex}.subject-chip.all{padding-inline-end:14px}.subject-chip[aria-current=true]{border-color:var(--blue-border)}}.service-line li{grid-template-columns:16px 1fr auto;align-items:center;gap:18px;min-height:64px;padding:10px 28px;font-weight:700;display:grid;position:relative}.service-line li:before{content:"";background:var(--ok);inset-inline-start:34px;width:2px;position:absolute;top:0;bottom:0}.service-line li:first-child:before{top:50%}.service-line li:last-child:before{bottom:50%}.service-line li.later:before{background:var(--rule)}.service-line .stop{position:relative}.service-line .state{color:var(--ok-ink);font-size:.8125rem;font-weight:600}.service-line .later,.service-line .later .state{color:var(--muted)}.service-error{border:1px solid var(--error-border);border-radius:var(--radius-sheet);background:var(--error-surface);color:var(--ink);grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:12px 18px;margin-block:0 20px;padding:18px 20px;display:grid}.service-error strong{font-family:var(--display);font-size:1.25rem;font-weight:600}.service-error p{color:var(--ink-2);margin-top:2px;font-weight:600}.service-mark{background:var(--amber);width:44px;height:44px;color:var(--amber-ink);border-radius:50%;place-items:center;display:grid}.service-mark svg{stroke-width:2.2px;width:22px;height:22px}.empty-state{text-align:center;border:1px dashed var(--field-border);border-radius:var(--radius-sheet);background:var(--porcelain);justify-items:center;gap:12px;padding:56px 24px;display:grid}.empty-state .mascot{width:84px;margin-bottom:0}.empty-state .mascot-ground{fill:var(--rule)}.empty-state h2,.empty-state h3{font-size:1.75rem}.empty-state p{color:var(--ink-2);max-width:42ch}.empty-help{margin-top:4px;font-size:.9375rem}.empty-help a{color:var(--blue-ink);font-weight:600}.empty-help a:hover{text-underline-offset:.3em;text-decoration:underline}.page-state{text-align:center;align-content:center;justify-items:center;gap:14px;min-height:60svh;padding-block:72px;display:grid}.loading-mascot,.state-mascot{width:120px;margin-bottom:-6px}.loading-mascot .mascot-ground,.state-mascot .mascot-ground{fill:var(--rule)}.page-state h1{max-width:18ch;font-size:clamp(2.25rem,5vw,3.25rem)}.page-state p{color:var(--ink-2);max-width:44ch}.state-actions{flex-wrap:wrap;justify-content:center;align-items:center;gap:8px 20px;margin-top:12px;display:flex}.loading-line{background:var(--blue-soft);border-radius:5px;width:160px;height:10px;display:block;position:relative;overflow:clip}.loading-line:before{content:"";border-radius:inherit;background:var(--go);width:40%;animation:ride 1.4s var(--ease-out) infinite;position:absolute;inset-block:0;inset-inline-start:0}@keyframes ride{0%{translate:-100%}to{translate:250%}}.pdf-dialog{background:var(--viewer-surface);border:0;width:100%;max-width:none;height:100dvh;max-height:none;margin:0;padding:0;position:fixed;inset:0;overflow:hidden}.pdf-dialog::backdrop{background:var(--viewer-backdrop)}.shelf{--row:198px;--board:10px;--gap:30px;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));grid-auto-rows:calc(var(--row) + var(--board));row-gap:var(--gap);background:repeating-linear-gradient(to bottom, transparent 0 var(--row), var(--tint-hover) var(--row) calc(var(--row) + var(--board) - 2px), var(--field-border) calc(var(--row) + var(--board) - 2px) calc(var(--row) + var(--board)), transparent calc(var(--row) + var(--board)) calc(var(--row) + var(--board) + var(--gap)));border-radius:5px;padding-inline:10px;display:grid}.shelf li{min-width:0;padding-bottom:var(--board);justify-content:center;align-items:flex-end;display:flex}.shelf li:nth-child(4n+1) .shelf-book{--tall:184px}.shelf li:nth-child(4n+2) .shelf-book{--tall:172px}.shelf li:nth-child(4n+3) .shelf-book{--tall:192px}.shelf-book{--hue:var(--hue-default);--tall:178px;width:128px;height:var(--tall);background:var(--hue);text-align:center;transform-origin:bottom;transition:translate .22s var(--ease-out), rotate .22s var(--ease-out), box-shadow .22s var(--ease-out);border-radius:3px 8px 8px 3px;grid-template-rows:auto minmax(0,1fr);gap:8px;padding:8px;padding-inline-start:17px;display:grid;position:relative}[dir=rtl] .shelf-book{border-radius:8px 3px 3px 8px}.shelf-book:before{content:"";border-radius:inherit;background:var(--hue);border-start-end-radius:0;border-end-end-radius:0;width:9px;position:absolute;inset-block:0;inset-inline-start:0}@supports (color:color-mix(in lab, red, red)){.shelf-book:before{background:color-mix(in srgb, var(--hue) 74%, #1d2025)}}.shelf-book:after{content:"";background:#fff8e7;border-radius:0 2px 2px 0;width:3px;position:absolute;inset-block:5px;inset-inline-end:-3px;box-shadow:inset 0 0 0 1px #ecdcb8}[dir=rtl] .shelf-book:after{border-radius:2px 0 0 2px}.shelf-book:hover,.shelf-book:focus-visible{box-shadow:var(--shadow-lift);translate:0 -8px;rotate:-1.5deg}.shelf-book .subject-art,.open-cover .subject-art{aspect-ratio:1;border-radius:6px;width:100%;height:auto}.shelf-book .subject-art{aspect-ratio:5/4}.shelf-label{background:var(--hue);border-radius:6px;align-content:center;gap:2px;min-height:0;padding:5px 4px;display:grid}@supports (color:color-mix(in lab, red, red)){.shelf-label{background:color-mix(in srgb, var(--hue) 12%, white)}}.shelf-label{color:var(--ink)}.shelf-title{-webkit-line-clamp:3;overflow-wrap:break-word;-webkit-hyphens:auto;hyphens:auto;-webkit-box-orient:vertical;font-size:.8125rem;font-weight:650;line-height:1.2;display:-webkit-box;overflow:hidden}.shelf-count{color:var(--ink-2);font-size:.75rem;font-weight:500}@media (prefers-reduced-motion:no-preference){.shelf-book{animation:shelf-in .42s var(--ease-out) calc(min(var(--i,0), 14) * 35ms) both}}@keyframes shelf-in{0%{opacity:0;translate:0 16px}}.book-dialog{background:0 0;border:0;place-items:center;width:100%;max-width:none;height:100dvh;max-height:none;margin:0;padding:20px;display:grid;position:fixed;inset:0;overflow:hidden}.book-dialog:not([open]){display:none}.book-dialog::backdrop{background:var(--viewer-backdrop)}.open-book{--hue:var(--hue-default);--cover:var(--hue)}@supports (color:color-mix(in lab, red, red)){.open-book{--cover:color-mix(in srgb, var(--hue) 82%, #1d2025)}}.open-book{perspective:1900px;transform-origin:0 0;grid-template-columns:1fr 1fr;width:min(880px,100%);height:min(540px,100%);transition:opacity .2s linear;display:grid;position:relative}.open-page{border:9px solid var(--cover);background:var(--porcelain);min-width:0;min-height:0}.open-inside{text-align:center;background:linear-gradient(to left, #10182817, transparent 26px) var(--porcelain);opacity:0;border-inline-end:0;border-radius:14px 0 0 14px;align-content:center;justify-items:center;gap:14px;padding:28px;transition:opacity .24s linear;display:grid}.open-contents{overscroll-behavior:contain;background:linear-gradient(to right, #10182817, transparent 26px) var(--porcelain);border-inline-start:0;border-radius:0 14px 14px 0;padding:26px 26px 22px;position:relative;overflow-y:auto}[dir=rtl] .open-inside{background:linear-gradient(to right, #10182817, transparent 26px) var(--porcelain);border-radius:0 14px 14px 0}[dir=rtl] .open-contents{background:linear-gradient(to left, #10182817, transparent 26px) var(--porcelain);border-radius:14px 0 0 14px}.open-inside .subject-art{aspect-ratio:1;border-radius:16px;width:min(168px,60%);height:auto}.open-inside h2{max-width:16ch;font-size:clamp(1.5rem,2.6vw,1.875rem)}.open-figures{color:var(--ink-2);flex-wrap:wrap;justify-content:center;gap:4px 16px;font-weight:500;display:flex}.open-figures strong{color:var(--ink);font-size:1.0625rem}.open-solved{color:var(--ok-ink);align-items:center;gap:4px;font-weight:600;display:inline-flex}.open-solved svg,.open-paper-solved svg{stroke-width:2.4px;width:16px;height:16px}.open-inside .button{margin-top:6px}.open-kicker{color:var(--muted);letter-spacing:.08em;text-transform:uppercase;margin-bottom:14px;font-size:.75rem;font-weight:650}[dir=rtl] .open-kicker{letter-spacing:0;font-size:.875rem}.open-chapter+.open-chapter{margin-top:18px}.open-chapter h3{border-bottom:1px solid var(--rule);color:var(--ink);justify-content:space-between;align-items:baseline;gap:12px;padding-bottom:6px;font-size:.9375rem;display:flex}.open-chapter h3 .num{color:var(--muted);font-size:.8125rem;font-weight:500}.open-chapter li button{text-align:start;width:calc(100% + 16px);min-height:40px;transition:background-color var(--dur) var(--ease-out);border-radius:8px;grid-template-columns:minmax(0,1fr) auto auto;align-items:center;gap:10px;margin-inline:-8px;padding:0 8px;display:grid}.open-chapter li button:hover{background:var(--tint)}.open-chapter li button:hover .open-paper-title{color:var(--blue-ink)}.open-paper-title{text-overflow:ellipsis;white-space:nowrap;font-size:.9375rem;font-weight:500;overflow:hidden}.open-paper-solved{color:var(--ok-ink)}.open-paper-year{color:var(--muted);font-size:.8125rem}.open-more{color:var(--muted);padding-top:4px;font-size:.8125rem}.open-close{background:var(--tint);width:36px;height:36px;color:var(--ink-2);opacity:0;transition:opacity .2s linear, background-color var(--dur) var(--ease-out);top:19px;border-radius:50%;place-items:center;display:grid;position:absolute;inset-inline-end:19px}.open-close:hover{background:var(--tint-hover);color:var(--ink)}.open-close svg{stroke-width:2.2px;width:18px;height:18px}.open-contents{padding-inline-end:64px}.open-cover{transform-origin:0;width:50%;transform-style:preserve-3d;pointer-events:none;transition:transform .64s cubic-bezier(.3,.1,.2,1);position:absolute;inset-block:0;inset-inline-end:0}[dir=rtl] .open-cover{transform-origin:100%}.open-cover-front,.open-cover-back{backface-visibility:hidden;border-radius:4px 14px 14px 4px;transition:opacity .14s linear;position:absolute;inset:0}[dir=rtl] .open-cover-front{border-radius:14px 4px 4px 14px}.open-cover-front{background:linear-gradient(to right, var(--hue) 0 22px, var(--hue) 22px);align-content:center;justify-items:center;gap:18px;padding:12% 16%;display:grid}@supports (color:color-mix(in lab, red, red)){.open-cover-front{background:linear-gradient(to right, color-mix(in srgb, var(--hue) 74%, #1d2025) 0 22px, var(--hue) 22px)}}.open-cover-front{box-shadow:var(--shadow-pop)}[dir=rtl] .open-cover-front{background:linear-gradient(to left, var(--hue) 0 22px, var(--hue) 22px)}@supports (color:color-mix(in lab, red, red)){[dir=rtl] .open-cover-front{background:linear-gradient(to left, color-mix(in srgb, var(--hue) 74%, #1d2025) 0 22px, var(--hue) 22px)}}.open-cover .subject-art{border-radius:12px;width:min(200px,74%)}.open-cover .shelf-label{border-radius:10px;width:min(260px,100%);padding:12px}.open-cover .shelf-title{text-align:center;font-size:1.25rem}.open-cover-back{border:9px solid var(--cover);background:var(--porcelain);border-radius:14px 0 0 14px;transform:rotateY(180deg)}.open-book[data-phase=open] .open-cover{transform:rotateY(-180deg)}.open-book[data-phase=open] .open-cover-back{opacity:0;transition-delay:.56s}[dir=rtl] .open-book[data-phase=open] .open-cover{transform:rotateY(180deg)}.open-book[data-phase=open] .open-inside{opacity:1;transition-delay:.42s}.open-book[data-phase=open] .open-close{opacity:1;transition-delay:.52s,0s}.open-book[data-phase=closing]{opacity:0;transition-delay:60ms}.open-chapter{opacity:0}.open-book[data-phase=open] .open-chapter{opacity:1;animation:chapter-in .38s var(--ease-out) calc(.44s + var(--n,0) * 70ms) both}.open-book[data-phase=closing] .open-chapter{opacity:1}@keyframes chapter-in{0%{opacity:0;translate:0 10px}}@media (max-width:47.5rem){.shelf{--row:186px;--gap:24px;grid-template-columns:repeat(auto-fill,minmax(108px,1fr));padding-inline:2px}.shelf-book{width:104px;padding:7px;padding-inline-start:15px}.shelf li:nth-child(4n+1) .shelf-book{--tall:172px}.shelf li:nth-child(4n+2) .shelf-book{--tall:164px}.shelf li:nth-child(4n+3) .shelf-book{--tall:180px}.shelf-book{--tall:168px}.book-dialog{padding:12px}.open-book{grid-template-rows:auto minmax(0,1fr);grid-template-columns:1fr;height:min(640px,100%)}.open-inside,[dir=rtl] .open-inside{border:9px solid var(--cover);text-align:start;background:var(--porcelain);border-bottom:0;border-radius:14px 14px 0 0;grid-template-columns:64px minmax(0,1fr);align-content:start;justify-items:start;gap:4px 14px;padding:16px 60px 16px 16px}[dir=rtl] .open-inside{padding:16px 16px 16px 60px}.open-inside .subject-art{border-radius:12px;grid-row:span 2;width:64px}.open-inside h2{align-self:end;max-width:none;font-size:1.25rem}.open-figures{justify-content:flex-start;font-size:.875rem}.open-inside .button{grid-column:1/-1;width:100%;margin-top:10px}.open-contents,[dir=rtl] .open-contents{border:9px solid var(--cover);border-top:1px solid var(--rule);background:var(--porcelain);border-radius:0 0 14px 14px;padding:16px}.open-chapter li button{min-height:44px}.open-close{top:17px;width:40px;height:40px;inset-inline-end:17px}.open-cover{width:100%}.open-cover-front,[dir=rtl] 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var(--tw-shadow)}.shadow-ink{--tw-shadow-color:var(--ink)}@supports (color:color-mix(in lab, red, red)){.shadow-ink{--tw-shadow-color:color-mix(in oklab, var(--ink) var(--tw-shadow-alpha), transparent)}}.outline{outline-style:var(--tw-outline-style);outline-width:1px}.blur{--tw-blur:blur(8px);filter:var(--tw-blur, ) var(--tw-brightness, ) var(--tw-contrast, ) var(--tw-grayscale, ) var(--tw-hue-rotate, ) var(--tw-invert, ) var(--tw-saturate, ) var(--tw-sepia, ) var(--tw-drop-shadow, )}.filter{filter:var(--tw-blur, ) var(--tw-brightness, ) var(--tw-contrast, ) var(--tw-grayscale, ) var(--tw-hue-rotate, ) var(--tw-invert, ) var(--tw-saturate, ) var(--tw-sepia, ) var(--tw-drop-shadow, )}.filter\!{filter:var(--tw-blur, ) var(--tw-brightness, ) var(--tw-contrast, ) var(--tw-grayscale, ) var(--tw-hue-rotate, ) var(--tw-invert, ) var(--tw-saturate, ) var(--tw-sepia, ) var(--tw-drop-shadow, )!important}.backdrop-filter{-webkit-backdrop-filter:var(--tw-backdrop-blur, ) var(--tw-backdrop-brightness, ) var(--tw-backdrop-contrast, ) var(--tw-backdrop-grayscale, ) var(--tw-backdrop-hue-rotate, ) var(--tw-backdrop-invert, ) var(--tw-backdrop-opacity, ) var(--tw-backdrop-saturate, ) var(--tw-backdrop-sepia, );backdrop-filter:var(--tw-backdrop-blur, ) var(--tw-backdrop-brightness, ) var(--tw-backdrop-contrast, ) var(--tw-backdrop-grayscale, ) var(--tw-backdrop-hue-rotate, ) var(--tw-backdrop-invert, ) var(--tw-backdrop-opacity, ) var(--tw-backdrop-saturate, ) var(--tw-backdrop-sepia, )}.transition{transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,--tw-gradient-from,--tw-gradient-via,--tw-gradient-to,opacity,box-shadow,transform,translate,scale,rotate,filter,-webkit-backdrop-filter,backdrop-filter,display,content-visibility,overlay,pointer-events;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}.transition-\[border-color\]{transition-property:border-color;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}.transition-\[rotate\]{transition-property:rotate;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}.transition-colors{transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,--tw-gradient-from,--tw-gradient-via,--tw-gradient-to;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}.duration-\(--dur\){--tw-duration:var(--dur);transition-duration:var(--dur)}.ease-\(--ease-out\),.ease-out{--tw-ease:var(--ease-out);transition-timing-function:var(--ease-out)}.\[--chip\:28px\]{--chip:28px}:is(:where(.group\/more):is([open],:popover-open,:open) .group-open\/more\:order-2){order:2}:is(:where(.group\/more):is([open],:popover-open,:open) .group-open\/more\:hidden){display:none}:is(:where(.group\/more):is([open],:popover-open,:open) .group-open\/more\:inline){display:inline}:is(:where(.group\/more):is([open],:popover-open,:open) .group-open\/more\:-rotate-90){rotate:-90deg}@media (hover:hover){:is(:where(.group):hover .group-hover\:border-go){border-color:var(--go)}:is(:where(.group):hover .group-hover\:bg-go){background-color:var(--go)}:is(:where(.group):hover .group-hover\:text-blue-ink){color:var(--blue-ink)}:is(:where(.group):hover .group-hover\:text-on-go){color:var(--on-go)}}:is(:where(.group):focus-visible .group-focus-visible\:border-go){border-color:var(--go)}:is(:where(.group):focus-visible .group-focus-visible\:bg-go){background-color:var(--go)}:is(:where(.group):focus-visible .group-focus-visible\:text-blue-ink){color:var(--blue-ink)}:is(:where(.group):focus-visible .group-focus-visible\:text-on-go){color:var(--on-go)}.placeholder\:text-muted::placeholder{color:var(--muted)}.open\:flex:is([open],:popover-open,:open){display:flex}.open\:flex-col:is([open],:popover-open,:open){flex-direction:column}@media (hover:hover){.hover\:border-field-border-hover:hover{border-color:var(--field-border-hover)}.hover\:border-rule:hover{border-color:var(--rule)}.hover\:bg-porcelain:hover{background-color:var(--porcelain)}.hover\:bg-sky:hover{background-color:var(--sky)}.hover\:bg-tint:hover{background-color:var(--tint)}.hover\:text-ink:hover{color:var(--ink)}.hover\:underline:hover{text-decoration-line:underline}}.focus-visible\:border-go:focus-visible{border-color:var(--go)}.focus-visible\:bg-porcelain:focus-visible{background-color:var(--porcelain)}.focus-visible\:bg-sky:focus-visible{background-color:var(--sky)}.focus-visible\:shadow-\[0_0_0_3px_var\(--blue-soft\)\]:focus-visible{--tw-shadow:0 0 0 3px var(--tw-shadow-color,var(--blue-soft));box-shadow:var(--tw-inset-shadow), var(--tw-inset-ring-shadow), var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow)}.focus-visible\:outline-none:focus-visible{--tw-outline-style:none;outline-style:none}.disabled\:opacity-60:disabled{opacity:.6}.has-\[form\]\:col-span-full:has(:is(form)){grid-column:1/-1}.aria-pressed\:border-go[aria-pressed=true]{border-color:var(--go)}.aria-pressed\:bg-sky[aria-pressed=true]{background-color:var(--sky)}.aria-selected\:font-semibold[aria-selected=true]{--tw-font-weight:var(--font-weight-semibold);font-weight:var(--font-weight-semibold)}.aria-selected\:text-blue-ink[aria-selected=true]{color:var(--blue-ink)}.data-active\:bg-tint[data-active]{background-color:var(--tint)}@media not all and (min-width:75rem){.max-wide\:grid-cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}.max-wide\:grid-cols-\[minmax\(0\,1fr\)_300px\]{grid-template-columns:minmax(0,1fr) 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4)}.max-phone\:pt-5{padding-top:calc(var(--spacing) * 5)}.max-phone\:pb-6{padding-bottom:calc(var(--spacing) * 6)}.max-phone\:text-start{text-align:start}.max-phone\:text-\[\.875rem\]{font-size:.875rem}.max-phone\:text-\[1\.375rem\]{font-size:1.375rem}}.rtl\:-scale-x-100:where(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)),[dir=rtl],[dir=rtl] *){--tw-scale-x:calc(100% * -1);scale:var(--tw-scale-x) var(--tw-scale-y)}.rtl\:scale-x-100:where(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)),[dir=rtl],[dir=rtl] *){--tw-scale-x:100%;scale:var(--tw-scale-x) var(--tw-scale-y)}.rtl\:-rotate-90:where(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)),[dir=rtl],[dir=rtl] *){rotate:-90deg}:is(:where(.group\/more):is([open],:popover-open,:open) .rtl\:group-open\/more\:rotate-90:where(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)),[dir=rtl],[dir=rtl] *)){rotate:90deg}@media (min-width:75rem){.wide\:\[\&_\.paper-main\]\:grid-cols-none .paper-main{grid-template-columns:none}.wide\:\[\&_\.paper-meta\]\:flex .paper-meta{display:flex}.wide\:\[\&_\.paper-tile\]\:grid .paper-tile{display:grid}}.\[\&\:\:-webkit-details-marker\]\:hidden::-webkit-details-marker{display:none}}:root{--ground:#fcfdff;--porcelain:#fcfdff;--porcelain-quiet:#f9fafb;--sky:#f7f8fa;--sky-border:#e6e8ec;--ink:#1d2025;--ink-2:#4a5160;--muted:#677080;--rule:#e6e8ec;--field-border:#d3d7de;--field-border-hover:#aab1bd;--field-edge:#7d8595;--field-edge-hover:#687183;--tint:#f2f4f7;--tint-hover:#eaedf1;--go:#2563eb;--go-hover:#1d4ed8;--go-lip:transparent;--on-go:#fbfcff;--ok:#16a34a;--ok-soft:#eaf7ee;--ok-ink:#166534;--blue:#2563eb;--blue-ink:#1d4ed8;--blue-soft:#eef3ff;--blue-border:#c9d7fd;--blue-soft-hover:#e2eafe;--amber:#fbbf24;--amber-ink:#1d2025;--line-primary:#f08c00;--line-middle:#a26be6;--line-secondary:#3d7ddb;--error:#c62520;--error-surface:#ffeceb;--error-border:#ffb2b0;--enamel:var(--ink);--on-enamel:#fbfcff;--on-enamel-2:var(--ink-2);--enamel-rule:var(--rule);--hue-default:#5c5c5c;--hue-math:#1cb0f6;--hue-calculator:#4b6cb7;--hue-physics:#8a5ae6;--hue-science:#58cc02;--hue-arabic:#ff7a00;--hue-french:#2b70f0;--hue-english:#ff4b8b;--hue-history:#e0a100;--hue-islamic:#00b89c;--hue-civic:#6b5cff;--hue-computing:#00a7d6;--hue-amazigh:#ffb100;--hue-philosophy:#b25cff;--hue-art:#ff4b4b;--hue-music:#d14bff;--hue-sport:#ff6a2b;--hue-book:#6b6b6b;--shadow-ink:#101828;--shadow-hairline:0 1px 2px #1018280f;--shadow-pop:0 12px 28px #1018281f;--shadow-lift:0 6px 16px -8px #10182829;--on-ink-soft:#fbfcff2e;--display:"Inter", "Noto Sans Arabic", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--arabic:"Noto Sans Arabic", Tahoma, sans-serif;--body:"Inter", "Noto Sans Arabic", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--gutter:40px;--container:1200px;--radius-sheet:14px;--radius-control:10px;--lip:0px;--dur:.14s;--ease-out:cubic-bezier(.16, 1, .3, 1);--nav-height:68px;--background:var(--ground);--surface:var(--porcelain);--text:var(--ink);--border:var(--rule);--accent:var(--go);--accent-hover:var(--go-hover);--accent-ink:var(--on-go);--viewer-surface:var(--porcelain-quiet);--viewer-backdrop:#1d2025b3;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}@media (max-width:60rem){:root{--gutter:24px}}@media (max-width:40rem){:root{--gutter:16px;--nav-height:60px}}@property --tw-translate-x{syntax:"*";inherits:false;initial-value:0}@property --tw-translate-y{syntax:"*";inherits:false;initial-value:0}@property --tw-translate-z{syntax:"*";inherits:false;initial-value:0}@property --tw-scale-x{syntax:"*";inherits:false;initial-value:1}@property --tw-scale-y{syntax:"*";inherits:false;initial-value:1}@property --tw-scale-z{syntax:"*";inherits:false;initial-value:1}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-divide-y-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-leading{syntax:"*";inherits:false}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-tracking{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}@property --tw-backdrop-blur{syntax:"*";inherits:false}@property --tw-backdrop-brightness{syntax:"*";inherits:false}@property --tw-backdrop-contrast{syntax:"*";inherits:false}@property --tw-backdrop-grayscale{syntax:"*";inherits:false}@property --tw-backdrop-hue-rotate{syntax:"*";inherits:false}@property --tw-backdrop-invert{syntax:"*";inherits:false}@property --tw-backdrop-opacity{syntax:"*";inherits:false}@property --tw-backdrop-saturate{syntax:"*";inherits:false}@property --tw-backdrop-sepia{syntax:"*";inherits:false}@property --tw-duration{syntax:"*";inherits:false}@property --tw-ease{syntax:"*";inherits:false}