@import"https://fonts.googleapis.com/css2?family=Roboto:wght@400;500;700&display=swap";@import"https://fonts.googleapis.com/css2?family=Orbitron:wght@600;700&display=swap";:root{font-family:Roboto,sans-serif;color:#212121;background-color:#fafafa}*{box-sizing:border-box}body{margin:0;min-height:100vh;background-color:#fafafa;overflow-x:hidden}#root{min-height:100vh;width:100%}button{font-family:inherit}#root{width:100%;margin:0;padding:0}.app-content{padding:24px 0 80px}.lesson-page{padding-top:0}.card{padding:24px;border:1px solid rgba(0,0,0,.08)}.home-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}.home-grid{display:grid;gap:calc(18px + 1rem);grid-template-columns:repeat(auto-fill,8rem);justify-content:start;margin:0}.home-screen{padding:0 2rem}.home-item{width:8rem;display:flex;flex-direction:column;align-items:center;gap:.4rem}.home-tile{position:relative;width:8rem;height:8rem;min-width:0;min-height:0;padding:0;border-radius:18px;border:2px solid transparent;background:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 3px 8px #0000001a;overflow:visible;transition:box-shadow .16s ease}.home-icon-wrap{width:100%;height:100%;border-radius:16px;overflow:hidden;display:flex;align-items:center;justify-content:center}.home-lock{position:absolute;top:-.35rem;right:-.35rem;width:2rem;height:2rem;border-radius:50%;background:#d1001f;color:#ffed37;display:inline-flex;align-items:center;justify-content:center;z-index:1;box-shadow:0 4px 10px #0000002e;border:2px solid #ffed37}.home-tile:hover{border:2px solid #e65100;box-shadow:0 6px 14px #00000029}.home-icon{width:100%;height:100%;object-fit:cover}.home-title{width:100%;padding:0 .5rem;font-size:.75rem;text-align:center;color:#555;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.popup-teacher{font-weight:700;color:#e65100}.lesson-popover-title{display:flex;align-items:baseline;justify-content:space-between;gap:12px}.lesson-popover-id{color:#00000073;font-weight:600;white-space:nowrap}.lesson-stepper{width:100%;margin:0;position:sticky;top:0;z-index:10;background:#fafafa;padding:.5rem 0;border-bottom:1px solid rgba(0,0,0,.12);box-shadow:none;display:flex;align-items:center;justify-content:center;left:0;right:0}.lesson-tabs-bar{position:sticky;top:0;z-index:10;background:#fafafa;padding:.5rem 0;border-bottom:1px solid rgba(0,0,0,.12)}.lesson-tabs-scroll{scrollbar-width:none;-ms-overflow-style:none}.lesson-tabs-scroll::-webkit-scrollbar{display:none}.lesson-tabs-scroll .MuiTabs-scroller{scrollbar-width:none}.lesson-tabs-scroll .MuiTabs-scroller::-webkit-scrollbar{display:none}.lesson-stepper-inner{width:min(60%,720px);margin:0 auto}.lesson-stepper-reset{position:fixed!important;right:.5rem;top:.05rem;transform:none;height:40px;width:40px;z-index:1300}.lesson-stepper-refresh{position:fixed!important;left:.5rem;top:.05rem;transform:none;height:40px;width:40px;z-index:1300}.lesson-stepper .MuiStepLabel-label.Mui-active{color:#e65100;font-weight:700}.lesson-stepper .MuiStepLabel-label.Mui-completed{color:#2e7d32;font-weight:600}.lesson-stepper .MuiStepConnector-line{border-color:#00000042;border-top-width:2px}.lesson-stepper .MuiStepConnector-root.Mui-active .MuiStepConnector-line{border-color:#e65100}.lesson-stepper .MuiStepConnector-root.Mui-completed .MuiStepConnector-line{border-color:#2e7d32}.lesson-content{width:80%;margin-left:auto;margin-right:auto;padding:0;background:transparent;display:block}.lesson-complete-notice{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);background:#2e7d32;color:#fff;padding:.75rem 1.25rem;border-radius:12px;font-weight:600;z-index:1400;animation:lessonCompleteFade 3s ease-in-out forwards}@keyframes lessonCompleteFade{0%{opacity:0;transform:translate(-50%,-50%) scale(.98)}10%{opacity:1;transform:translate(-50%,-50%) scale(1)}80%{opacity:1;transform:translate(-50%,-50%) scale(1)}to{opacity:0;transform:translate(-50%,-50%) scale(.98)}}@media(max-width:900px){.lesson-content{width:90%}}@media(max-width:900px)and (orientation:landscape){.lesson-content{width:80%}}@media(max-width:600px){.lesson-tabs-bar .MuiTabs-flexContainer{justify-content:flex-start}.lesson-stepper-inner{width:100%;padding:0 .5rem}.lesson-stepper-reset{right:.5rem;top:2.5rem;height:32px;width:32px}.lesson-stepper-refresh{left:.5rem;top:2.5rem;height:32px;width:32px}.lesson-content{width:95%}}.exercise-panel{padding:0;border:none;background:transparent}.exercise-score-box{position:fixed;top:5rem;right:1rem;width:120px;height:80px;padding:10px 20px;border-radius:12px;background:transparent;border:1px solid #e65100;display:flex;flex-direction:column;align-items:center;justify-content:center;font-family:Orbitron,Digital-7,Courier New,monospace;color:#e65100;z-index:1300}.exercise-score-label{font-size:.6rem;letter-spacing:.3rem;font-weight:600;margin-top:.5rem}.exercise-score-value{font-size:36px;font-weight:700;letter-spacing:4px}.exercise-dot-strip{display:flex;align-items:center;gap:8px;overflow-x:auto;white-space:nowrap;flex:1;padding:4px;scrollbar-width:none;justify-content:flex-start}.exercise-dot-strip.centered{justify-content:center}.exercise-dot-strip::-webkit-scrollbar{display:none}.exercise-dot-dock{position:fixed;left:0;right:0;bottom:56px;background:#fafafa;padding:.5rem 1rem;border-top:1px solid rgba(0,0,0,.08);z-index:1200}.exercise-dot{width:14px;height:14px;border-radius:999px;border:2px solid transparent;aspect-ratio:1 / 1;background:#b0b0b0;padding:0;cursor:pointer}.exercise-dot.locked{opacity:.5;cursor:default}.exercise-dot.unattempted{background:#b0b0b0}.exercise-dot.correct{background:#2e7d32}.exercise-dot.incorrect{background:#c62828}.exercise-dot.latest{background:#1e5dbb}.exercise-dot.displayed{border:2px solid #ffffff}.exercise-dot.displayed.unattempted{box-shadow:0 0 0 2px #b0b0b0}.exercise-dot.displayed.correct{box-shadow:0 0 0 2px #2e7d32}.exercise-dot.displayed.incorrect{box-shadow:0 0 0 2px #c62828}.exercise-dot.displayed.latest{box-shadow:0 0 0 2px #1e5dbb}.exercise-carousel-wrap{display:flex;align-items:center;gap:12px;max-width:100%}.exercise-carousel-nav{flex:0 0 auto}.exercise-carousel{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;flex:1;scrollbar-width:none;scroll-snap-stop:always;overscroll-behavior-x:contain;-webkit-overflow-scrolling:touch;gap:2rem}.exercise-carousel::-webkit-scrollbar{display:none}.exercise-slide{flex:0 0 100%;scroll-snap-align:center;padding:0 4px;display:flex;align-items:center;justify-content:center;min-height:calc(100vh - 200px)}.exercise-magic-fab.autopilot .MuiSvgIcon-root{animation:magicSpin 1.2s linear infinite;transform-origin:50% 50%;will-change:transform}@keyframes magicSpin{0%{transform:rotate(0) translateZ(0)}to{transform:rotate(360deg) translateZ(0)}}.exercise-slide-content{width:100%}.exercise-question{text-align:left;font-size:1.5rem;font-weight:600}.exercise-options-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;width:100%;margin-top:1rem;animation:stepFadeIn 1s ease .3s both}.exercise-options-grid button,.exercise-options button{text-transform:none;font-size:1rem;border-radius:14px}.exercise-options{animation:stepFadeIn 1s ease .3s both}.exercise-steps{margin:2rem 0;display:flex;flex-direction:column;gap:12px}.exercise-step-intro{font-weight:600;color:#7a1f1f;margin-bottom:.5rem!important}.exercise-step{padding:0;border:none;background:transparent}.exercise-step-line{display:block;line-height:1.5}.step-tick{width:20px;height:20px;display:inline-flex;align-items:center;justify-content:center;background-color:#d3d3d3;-webkit-mask:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='currentColor'><path d='M12 2C6.477 2 2 6.477 2 12s4.477 10 10 10 10-4.477 10-10S17.523 2 12 2zm-1.2 14.2-4-4 1.4-1.4 2.6 2.6 5.6-5.6 1.4 1.4-7 7z'/></svg>") center/contain no-repeat;mask:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='currentColor'><path d='M12 2C6.477 2 2 6.477 2 12s4.477 10 10 10 10-4.477 10-10S17.523 2 12 2zm-1.2 14.2-4-4 1.4-1.4 2.6 2.6 5.6-5.6 1.4 1.4-7 7z'/></svg>") center/contain no-repeat;margin-right:10px;vertical-align:text-bottom;flex:0 0 20px}.step-tick.correct{background-color:#2e7d32}.step-tick.incorrect{background-color:#c62828}.exercise-step-question{font-size:1.05rem;font-weight:400;display:inline}.exercise-step-question p{display:inline;margin:0}.exercise-step-question strong{font-weight:400}.exercise-step-answer-inline{font-weight:800;color:#fff;background:#1e5dbb;border-radius:4px;padding:0 .5rem;font-size:.88rem;display:inline-block;white-space:nowrap;margin-left:.5rem;vertical-align:text-bottom}.exercise-step-final-done+.exercise-options-grid{margin-top:1rem}.exercise-step-error{color:#8b0000;margin-top:8px}.fib-helper{margin-top:6px;margin-left:2px}.exercise-step-divider{height:1px;background:#00000014;margin:12px 0 4px;width:100%}.exercise-step-divider.post-steps{margin-top:-4px}.exercise-step-next{color:#1b5e20;font-weight:600;margin-bottom:8px;animation:stepFadeIn 1s ease .3s both}.step-options-grid button{font-size:.9rem;border-radius:12px;padding:8px 12px;transition:background-color .18s ease,border-color .18s ease,color .18s ease}.step-options-grid{gap:1rem;margin-top:1rem;margin-bottom:1rem}.step-options-pending{animation:stepOptionsFade 1s ease 1s forwards}@keyframes stepOptionsFade{to{opacity:0;transform:translateY(-4px)}}.fib-check{transform:translateY(-.75rem)}.step-options{margin-top:10px}.fib-textfield{width:20rem;max-width:100%;margin-left:auto;animation:stepFadeIn 1s ease .3s both}.fib-textfield .MuiOutlinedInput-root{border-radius:8px}.fib-textfield .MuiOutlinedInput-input{padding:12px 16px;font-size:1rem}.step-fib-textfield{width:16rem;margin-left:0}.step-fib-textfield .MuiOutlinedInput-input{padding:8px 12px;font-size:.95rem}.step-correct-pending .fib-textfield,.step-correct-pending .fib-check{animation:stepFadeOut 1s ease 1s forwards}.fib-helper-text{margin-left:2px;font-size:.78rem;line-height:1.2;color:#8b0000}.step-reveal{animation:stepFadeIn 1s ease .3s both}.exercise-step-reveal-note{color:#1b5e20;margin-top:1rem;animation:stepFadeIn 1s ease .3s both}.exercise-step-reveal-note.fade-out,.fade-out{animation:stepFadeOut 1s ease forwards}@keyframes stepFadeOut{to{opacity:0;transform:translateY(-4px)}}@keyframes stepFadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.fib-input{width:20rem;max-width:100%;padding:12px 16px;font-size:1rem;border-radius:8px;border:1px solid rgba(0,0,0,.2);background:#fff}.fib-row{display:flex;align-items:center;gap:12px;width:100%;justify-content:flex-start}.fib-row .fib-input{margin-left:auto}.fib-check.Mui-disabled{background:#0003;color:#fff}.fib-check svg{transform:scale(.7)}@media(max-width:900px){.exercise-options-grid{grid-template-columns:1fr}}@media(max-width:900px)and (orientation:landscape){.exercise-options-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:600px){.exercise-score-box{top:4rem;right:.5rem;width:60px;height:40px;padding:0;border-radius:6px;background:#1e5dbb;border:none;color:#fff}.exercise-score-label{display:none}.exercise-score-value{font-size:1.25rem;letter-spacing:0}.exercise-slide{min-height:calc(100vh - 260px)}}