@keyframes ticker{0%{transform:translate(0)}to{transform:translate(-50%)}}@keyframes float-updown{0%,to{transform:translateY(0)}50%{transform:translateY(-12px)}}@keyframes fade-up{0%{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}.animate-ticker{animation:18s linear infinite ticker}.animate-float{animation:5s ease-in-out infinite float-updown}.animate-fade-up{animation:.7s cubic-bezier(.16,1,.3,1) forwards fade-up}@media (prefers-reduced-motion:reduce){.animate-ticker,.animate-float,.animate-fade-up{opacity:1;animation:none;transform:none}}.marketing{--paper:#fff;--ink:#1a1814;--ink-2:#3a3630;--ink-3:#6b6557;--pencil:#6e6a5f;--pencil-2:#ada495;--rule:#789eb629;--rule-strong:#789eb661;--hl-wash:#e96a3a4d;--red-pen:#c24a3a;--red-wash:#fbe5df;--marker:#3f8a55;--marker-wash:#e2f0e7;--maths-tint:#eceafd;--maths-ink:#5245d6;--physics-tint:#e1effa;--physics-ink:#2a6fb4;--chem-tint:#fbe7da;--chem-ink:#b94e1b;--bio-tint:#e2f0e7;--bio-ink:#397c4c;--ai:#4f7a5c;--ai-tint:#e5efe6;--ai-ink:#2f4a38;--band:#f4f4f3;--band-edge:#1a18141a;--student-tint:#fff3ec;--teacher-tint:#e9f2eb;--school-tint:#edf3f7;--font-display:var(--font-literata), "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;--font-hand:var(--font-caveat), "Segoe Script", "Bradley Hand", cursive;--note-yellow:#fcf3b8;--note-yellow-edge:#a0821433;--tape:#e9a06e6b;font-family:var(--font-sans);background-color:var(--paper);color:var(--ink)}[data-theme=dark] .marketing{--paper:#131217;--ink:#f2f0eb;--ink-2:#d3cec5;--ink-3:#a8a296;--pencil:#a39d92;--pencil-2:#6e695f;--rule:#a0b4d224;--rule-strong:#a0b4d252;--red-pen:#ee7b6b;--red-wash:#3a1c17;--marker:#6fc287;--marker-wash:#18301f;--maths-tint:#25223f;--maths-ink:#a49cff;--physics-tint:#172a3b;--physics-ink:#74b6f0;--chem-tint:#3a2216;--chem-ink:#f09464;--bio-tint:#18301f;--bio-ink:#7ccb93;--ai:#7fb08d;--ai-tint:#1c2b21;--ai-ink:#b5d6bf;--band:#1a1920;--band-edge:#ffffff14;--student-tint:#2e1a12;--teacher-tint:#18301f;--school-tint:#172a3b;--note-yellow:#3a3414;--note-yellow-edge:#f0d26433}.mk-sheet{background-color:var(--paper);position:relative;overflow-x:clip}.mk-band,.mk-ink-band{box-shadow:0 0 0 100vmax var(--ground);clip-path:inset(0 -100vmax);background:var(--ground)}.mk-band{--ground:var(--band);box-shadow:0 0 0 100vmax var(--ground), 0 -1px 0 100vmax var(--band-edge), 0 1px 0 100vmax var(--band-edge);clip-path:inset(-1px -100vmax)}.mk-ink-band{--ground:var(--ink);color:var(--paper)}.mk-wrap{max-width:1280px;margin-inline:auto;padding-inline:24px}@media (min-width:640px){.mk-wrap{padding-inline:40px}}@media (min-width:1024px){.mk-wrap{padding-inline:56px}}.mk-hero{padding-top:112px;padding-bottom:64px}@media (min-width:640px){.mk-hero{padding-top:128px;padding-bottom:96px}}.mk-hl{background-image:linear-gradient(var(--hl-wash), var(--hl-wash));animation:mk-swipe .6s cubic-bezier(.22, .9, .32, 1) var(--d,.35s) forwards;background-position:0 82%;background-repeat:no-repeat;background-size:0% 62%;border-radius:2px 5px 3px 6px;padding:0 .08em}@keyframes mk-swipe{to{background-size:104% 62%}}.mk-wash{background-image:linear-gradient(var(--hl-wash), var(--hl-wash));background-position:0 82%;background-repeat:no-repeat;background-size:104% 62%;border-radius:2px 5px 3px 6px;padding:0 .08em}.mk-tick path{fill:none;stroke:var(--marker);stroke-width:2.1px;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:30;stroke-dashoffset:30px;animation:mk-draw .38s ease-out var(--d,0s) forwards}.mk-ring path{fill:none;stroke:var(--red-pen);stroke-width:1.7px;stroke-linecap:round;stroke-dasharray:240;stroke-dashoffset:240px;animation:mk-draw 1s ease-out var(--d,0s) forwards}@keyframes mk-draw{to{stroke-dashoffset:0}}.mk-flag{background-image:linear-gradient(var(--red-pen), var(--red-pen));animation:mk-underline .45s ease-out var(--d,0s) forwards;background-position:0 100%;background-repeat:no-repeat;background-size:0% 1.5px}@keyframes mk-underline{to{background-size:100% 1.5px}}.mk-box{display:inline-flex}.mk-box>b{font-family:var(--font-mono);border:1.3px solid var(--ink);min-width:26px;height:30px;color:var(--ink);place-items:center;margin-left:-1.3px;padding-inline:4px;font-weight:500;display:grid}.mk-box>b:first-child{margin-left:0}.mk-box-lg>b{min-width:38px;height:44px;font-size:20px}.mk-track{align-items:flex-end;height:14px;display:flex;position:relative}.mk-track:before{content:"";inset-inline:0;background:var(--pencil-2);opacity:.55;height:1px;position:absolute;bottom:2px}.mk-track>i{height:9px;width:var(--w);background:var(--hl-wash);border-radius:2px 6px 4px 7px;margin-bottom:1px;display:block}.mk-table{border-collapse:collapse;width:100%}.mk-table th{text-align:left;font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.14em;color:var(--pencil);border-bottom:1.5px solid var(--ink);padding:8px 12px;font-size:11px;font-weight:500}.mk-table td{border-bottom:1px solid var(--rule);color:var(--ink);padding:9px 12px;font-size:13px}.mk-table tbody tr:last-child td{border-bottom:0}.mk-hand{font-family:var(--font-hand);color:var(--accent-ink);letter-spacing:.01em;font-weight:600;line-height:1.2}.mk-ink-band .mk-hand{color:var(--accent)}.mk-draw path,.mk-draw ellipse{fill:none;stroke:var(--accent);stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:var(--len,700);stroke-dashoffset:var(--len,700);animation:mk-ink .9s cubic-bezier(.22, .9, .32, 1) var(--d,.3s) forwards}@keyframes mk-ink{to{stroke-dashoffset:0}}.mk-sticky{background:var(--note-yellow);border:1px solid var(--note-yellow-edge);transform:rotate(var(--tilt,0deg));border-radius:2px 2px 3px 3px;transition:transform .24s cubic-bezier(.22,.9,.32,1),box-shadow .24s;position:relative;box-shadow:0 2px 4px #261e120f,0 12px 26px #261e1217}.mk-sticky:before{content:"";background:var(--tape);width:116px;height:20px;position:absolute;top:-9px;left:50%;transform:translate(-50%)rotate(-1.4deg)}.mk-sticky:hover,.mk-sticky:focus-within{transform:rotate(0)translateY(-4px);box-shadow:0 4px 8px #261e1212,0 18px 38px #261e1221}.mk-ribbon{background:var(--accent);color:#fff;font-family:var(--font-hand);clip-path:polygon(0 0,100% 0,100% 100%,50% 84%,0 100%);padding:8px 18px 16px;font-size:18px;font-weight:600;line-height:1;position:absolute;top:-14px;right:-10px;transform:rotate(2.5deg)}.mk-tickbox{flex-shrink:0;width:26px;height:26px;display:inline-block;overflow:visible}.mk-tickbox .box,.mk-tickbox .tick{fill:none;stroke-linecap:round;stroke-linejoin:round}.mk-tickbox .box{stroke:var(--pencil-2);stroke-width:1.5px;stroke-dasharray:76;stroke-dashoffset:76px;animation:mk-ink .5s ease-out var(--d,0s) forwards}.mk-tickbox .tick{stroke:var(--marker);stroke-width:2.7px;stroke-dasharray:34;stroke-dashoffset:34px;animation:mk-ink .34s ease-out calc(var(--d,0s) + .32s) forwards}@media (prefers-reduced-motion:reduce){.mk-draw path,.mk-draw ellipse,.mk-tickbox .box,.mk-tickbox .tick{stroke-dashoffset:0;animation:none}.mk-sticky{transition:none}}.mk-marquee{overflow:hidden;-webkit-mask-image:linear-gradient(90deg,#0000,#000 6% 94%,#0000);mask-image:linear-gradient(90deg,#0000,#000 6% 94%,#0000)}.mk-marquee-track{width:max-content;animation:48s linear infinite mk-marquee;display:flex}@keyframes mk-marquee{0%{transform:translate(-50%)}to{transform:translate(0)}}.mk-marquee:hover .mk-marquee-track,.mk-marquee:focus-within .mk-marquee-track{animation-play-state:paused}@media (prefers-reduced-motion:reduce){.mk-marquee-track{animation:none;transform:none}}.mk-bar{background:#edeae4;border-radius:2px;height:9px;display:block}.mk-bar-earned{background:#3f8a553d}.mk-bar-flag{background:var(--red-wash);box-shadow:inset 0 -1.5px 0 var(--red-pen)}.mk-chip{background:var(--paper);color:var(--ink);border:1px solid;align-items:center;gap:8px;padding:4px 11px 4px 4px;font-size:12px;line-height:1.4;display:inline-flex}.mk-chip>b{min-width:26px;height:24px;font-family:var(--font-mono);color:#fff;border-radius:5px;place-items:center;padding-inline:5px;font-size:11px;font-weight:600;display:grid}.mk-chip-plus{border-color:#3f8a558c}.mk-chip-plus>b{background:var(--marker)}.mk-chip-minus{border-color:#c24a3a8c}.mk-chip-minus>b{background:var(--red-pen)}.mk-step{opacity:0;animation:fade-up .5s cubic-bezier(.16, 1, .3, 1) var(--d,0s) forwards}@media (prefers-reduced-motion:reduce){.mk-hl{background-size:104% 62%;animation:none}.mk-flag{background-size:100% 1.5px;animation:none}.mk-tick path,.mk-ring path{stroke-dashoffset:0;animation:none}.mk-step{opacity:1;animation:none;transform:none}}