*{box-sizing:border-box}html,body,#root{margin:0;padding:0;height:100%;width:100%;background-color:#000;overflow:hidden}.loading-container{display:flex;flex-direction:column;align-items:center;color:#fff;font-family:sans-serif;box-sizing:border-box;height:100vh;width:100%}.loading-container.exiting{animation:fadeOut .5s forwards}.top-section{width:100%;text-align:center;padding-top:10vh}.bottom-section{width:100%;flex-grow:1;display:flex;align-items:flex-end;justify-content:center;padding-bottom:15vh}.welcome-message{font-size:2.5rem;cursor:pointer;opacity:0;transition:opacity .5s ease-in;text-shadow:0px 0px 10px rgba(0,0,0,.7)}.loader-group{display:flex;flex-direction:column;align-items:center}.loading-bar-background{width:300px;height:10px;background-color:#444;border-radius:5px;overflow:hidden}.loading-bar-progress{width:0%;height:100%;background-color:#fff;border-radius:5px;transition:width .1s linear}.loading-percentage{font-size:1.2rem;margin-top:20px;text-shadow:0px 0px 10px rgba(0,0,0,.7)}.vocabulary-rain-container{position:fixed;top:0;left:0;width:100vw;height:100vh;pointer-events:none;z-index:500;overflow:hidden}.vocabulary-word{position:absolute;top:-50px;font-weight:600;text-shadow:0 0 10px rgba(0,0,0,.5);animation:fall linear;white-space:nowrap;font-family:Arial,sans-serif}@keyframes fall{0%{top:-50px;opacity:1}to{top:100vh;opacity:.3}}:root{--border-color: #392e4e;--background-dark: #060010;--white: hsl(0, 0%, 100%);--glow-color-rgb: 132, 0, 255}.clickable-card{position:relative;transition:transform .2s ease,box-shadow .2s ease}.clickable-card:hover{transform:translateY(-2px)}.clickable-card:focus{outline:2px solid rgba(var(--glow-color),.5);outline-offset:2px}.clickable-card:focus:not(:focus-visible){outline:none}.clickable-card:active{transform:scale(.98) translateY(-1px)}.clickable-card 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-45deg;transform:translateZ(1px);overflow:hidden;z-index:3;background:transparent;background-size:cover;background-position:center;background-image:repeating-linear-gradient(0deg,var(--sunpillar-clr-1) calc(var(--space) * 1),var(--sunpillar-clr-2) calc(var(--space) * 2),var(--sunpillar-clr-3) calc(var(--space) * 3),var(--sunpillar-clr-4) calc(var(--space) * 4),var(--sunpillar-clr-5) calc(var(--space) * 5),var(--sunpillar-clr-6) calc(var(--space) * 6),var(--sunpillar-clr-1) calc(var(--space) * 7)),repeating-linear-gradient(var(--angle),#0e152e 0%,hsl(180,10%,60%) 3.8%,hsl(180,29%,66%) 4.5%,hsl(180,10%,60%) 5.2%,#0e152e 10%,#0e152e 12%),radial-gradient(farthest-corner circle at var(--pointer-x) var(--pointer-y),hsla(0,0%,0%,.1) 12%,hsla(0,0%,0%,.15) 20%,hsla(0,0%,0%,.25) 120%);background-position:0 var(--background-y),var(--background-x) var(--background-y),center;background-blend-mode:color,hard-light;background-size:500% 500%,300% 300%,200% 200%;background-repeat:repeat}.pc-shine:before,.pc-shine:after{content:"";background-position:center;background-size:cover;grid-area:1/1;opacity:0}.pc-card:hover .pc-shine,.pc-card.active .pc-shine{filter:brightness(.85) contrast(1.5) saturate(.5);animation:none}.pc-card:hover .pc-shine:before,.pc-card.active .pc-shine:before,.pc-card:hover .pc-shine:after,.pc-card.active .pc-shine:after{opacity:1}.pc-shine:before{background-image:linear-gradient(45deg,var(--sunpillar-4),var(--sunpillar-5),var(--sunpillar-6),var(--sunpillar-1),var(--sunpillar-2),var(--sunpillar-3)),radial-gradient(circle at var(--pointer-x) var(--pointer-y),hsl(0,0%,70%) 0%,hsla(0,0%,30%,.2) 90%),var(--grain);background-size:250% 250%,100% 100%,220px 220px;background-position:var(--pointer-x) var(--pointer-y),center,calc(var(--pointer-x) * .01) calc(var(--pointer-y) * .01);background-blend-mode:color-dodge;filter:brightness(calc(2 - var(--pointer-from-center))) contrast(calc(var(--pointer-from-center) + 2)) saturate(calc(.5 + var(--pointer-from-center)));mix-blend-mode:luminosity}.pc-shine:after{background-position:0 var(--background-y),calc(var(--background-x) * .4) calc(var(--background-y) * .5),center;background-size:200% 300%,700% 700%,100% 100%;mix-blend-mode:difference;filter:brightness(.8) contrast(1.5)}.pc-glare{transform:translateZ(1.1px);overflow:hidden;background-image:radial-gradient(farthest-corner circle at var(--pointer-x) var(--pointer-y),hsl(248,25%,80%) 12%,hsla(207,40%,30%,.8) 90%);mix-blend-mode:overlay;filter:brightness(.8) contrast(1.2);z-index:4}.pc-avatar-content{mix-blend-mode:screen;overflow:hidden}.pc-avatar-content .avatar{width:100%;position:absolute;left:50%;transform:translate(-50%) scale(1);bottom:2px;opacity:calc(1.75 - var(--pointer-from-center))}.pc-avatar-content:before{content:"";position:absolute;inset:0;z-index:1;-webkit-backdrop-filter:blur(30px);backdrop-filter:blur(30px);mask:linear-gradient(to bottom,rgba(0,0,0,0) 0%,rgba(0,0,0,0) 60%,rgba(0,0,0,1) 90%,rgba(0,0,0,1) 100%);pointer-events:none}.pc-user-info{position:absolute;bottom:20px;left:20px;right:20px;z-index:2;display:flex;align-items:center;justify-content:space-between;background:#ffffff1a;-webkit-backdrop-filter:blur(30px);backdrop-filter:blur(30px);border:1px solid rgba(255,255,255,.1);border-radius:15px;padding:12px 14px;pointer-events:auto}.pc-user-details{display:flex;align-items:center;gap:12px}.pc-mini-avatar{width:48px;height:48px;border-radius:50%;overflow:hidden;border:1px solid rgba(255,255,255,.1);flex-shrink:0}.pc-mini-avatar img{width:100%;height:100%;object-fit:cover;border-radius:50%}.pc-user-text{display:flex;align-items:flex-start;flex-direction:column;gap:6px}.pc-handle{font-size:14px;font-weight:500;color:#ffffffe6;line-height:1}.pc-status{font-size:14px;color:#ffffffb3;line-height:1}.pc-contact-btn{border:1px solid rgba(255,255,255,.1);border-radius:8px;padding:8px 16px;font-size:14px;font-weight:600;color:#ffffffe6;cursor:pointer;transition:all .2s ease;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.pc-contact-btn:hover{border-color:#fff6;transform:translateY(-1px);transition:all .2s ease}.pc-content{max-height:100%;overflow:hidden;text-align:center;position:relative;transform:translate3d(calc(var(--pointer-from-left) * -6px + 3px),calc(var(--pointer-from-top) * -6px + 3px),.1px)!important;z-index:5;mix-blend-mode:luminosity}.pc-details{width:100%;position:absolute;top:3em;display:flex;flex-direction:column}.pc-details h3{font-weight:600;font-size:min(5svh,3em);margin:0;background-image:linear-gradient(to bottom,#fff,#6f6fbe);background-size:1em 1.5em;-webkit-text-fill-color:transparent;background-clip:text;-webkit-background-clip:text}.pc-details p{font-weight:600;position:relative;top:-12px;white-space:nowrap;font-size:16px;margin:0 auto;width:min-content;background-image:linear-gradient(to bottom,#fff,#4a4ac0);background-size:1em 1.5em;-webkit-text-fill-color:transparent;background-clip:text;-webkit-background-clip:text}@keyframes glow-bg{0%{--bgrotate: 0deg}to{--bgrotate: 360deg}}@keyframes holo-bg{0%{background-position:0 var(--background-y),0 0,center}to{background-position:0 var(--background-y),90% 90%,center}}@media (max-width: 768px){.pc-card{height:70svh;max-height:450px}.pc-details{top:2em}.pc-details h3{font-size:min(4svh,2.5em)}.pc-details p{font-size:14px}.pc-user-info{bottom:15px;left:15px;right:15px;padding:10px 12px}.pc-mini-avatar{width:28px;height:28px}.pc-user-details{gap:10px}.pc-handle{font-size:13px}.pc-status{font-size:10px}.pc-contact-btn{padding:6px 12px;font-size:11px}}@media (max-width: 480px){.pc-card{height:60svh;max-height:380px}.pc-details{top:1.5em}.pc-details h3{font-size:min(3.5svh,2em)}.pc-details p{font-size:12px;top:-8px}.pc-user-info{bottom:12px;left:12px;right:12px;padding:8px 10px;border-radius:50px}.pc-mini-avatar{width:24px;height:24px}.pc-user-details{gap:8px}.pc-handle{font-size:12px}.pc-status{font-size:9px}.pc-contact-btn{padding:5px 10px;font-size:10px;border-radius:50px}}@media (max-width: 320px){.pc-card{height:55svh;max-height:320px}.pc-details h3{font-size:min(3svh,1.5em)}.pc-details p{font-size:11px}.pc-user-info{padding:6px 8px;border-radius:50px}.pc-mini-avatar{width:20px;height:20px}.pc-user-details{gap:6px}.pc-handle{font-size:11px}.pc-status{font-size:8px}.pc-contact-btn{padding:4px 8px;font-size:9px;border-radius:50px}}.homepage-container{display:flex;position:fixed;z-index:1000;transition:all 1s ease-in-out}.quote-gradient-text{background:linear-gradient(90deg,#40ffaa,#4079ff,#40ffaa,#4079ff,#40ffaa);background-size:200% auto;color:#000;background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent;animation:gradient-animation 3s linear infinite}.homepage-container.centered{top:50%;left:50%;transform:translate(-50%,-50%);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);padding:1rem 2rem;border-radius:20px}.homepage-container.top-left{top:20px;left:20px;transform:translate(0);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);padding:.5rem 1rem;border-radius:12px}.mafia-title{font-size:5rem;font-weight:700;text-align:center;line-height:1.1;transition:font-size 1s ease-in-out;background:linear-gradient(90deg,#40ffaa,#4079ff,#40ffaa,#4079ff,#40ffaa);background-size:200% auto;color:#000;background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent;animation:gradient-animation 3s linear infinite}.mafia-title.smaller{font-size:2.5rem}.click-highlight{background:linear-gradient(90deg,#40ffaa,#4079ff,#40ffaa,#4079ff,#40ffaa);background-size:200% auto;background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent;font-weight:700;font-size:2em;vertical-align:middle;margin-right:.2em;animation:pulse-glow 2.5s infinite ease-in-out}@keyframes pulse-glow{0%,to{text-shadow:0 0 5px rgba(255,255,255,.2),0 0 10px rgba(132,0,255,.3)}50%{text-shadow:0 0 10px rgba(255,255,255,.4),0 0 20px rgba(132,0,255,.6)}}:root{--mafia-green: #40ffaa;--mafia-blue: #4079ff}@keyframes slideIn{0%{opacity:0;transform:translateY(30px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}.test-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:#000c;-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn .4s ease-out}.test-back-btn{position:fixed;top:2rem;left:2rem;z-index:1001;background:#ffffff1a;border:3px solid rgba(64,121,255,1);color:#40ffaa;padding:.75rem 1.5rem;border-radius:11px;font-size:1rem;font-weight:500;cursor:pointer;transition:all .2s ease}.test-back-btn:hover{background:#fff3;border-color:#fff6;transform:translateY(-2px)}.test-modal{width:90%;max-width:700px;background-color:#000;border:1px solid var(--mafia-green);border-radius:20px;padding:2rem 3rem;box-shadow:0 0 40px #40ffaa33;display:flex;flex-direction:column;gap:2rem;animation:slideIn .5s ease-out;color:#fff}.test-progress-section{width:100%}.test-progress-text{font-size:1rem;color:var(--mafia-green);text-align:center;margin-bottom:.75rem;margin:0 0 .75rem}.test-progress-bar-background{width:100%;height:8px;background-color:#40ffaa1a;border-radius:4px}.test-progress-bar-fill{height:100%;background:var(--mafia-green);border-radius:4px;transition:width .2s ease}.test-question-section{text-align:center}.test-instruction{font-size:1.2rem;color:#ffffffb3;margin-bottom:.5rem;margin:0 0 .5rem}.test-word{font-size:3rem;font-weight:700;margin:0;background:linear-gradient(90deg,var(--mafia-green),var(--mafia-blue));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;background-size:200% 100%;animation:gradientMove 2s ease-in-out infinite alternate}.test-options-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.test-option-btn{padding:1rem;font-size:1.1rem;font-weight:500;color:#fff;background-color:#4079ff1a;border:2px solid rgba(64,121,255,.4);border-radius:12px;cursor:pointer;transition:all .2s ease;text-align:center}.test-option-btn:hover{background-color:#4079ff33;border-color:var(--mafia-blue);transform:translateY(-2px);box-shadow:0 5px 15px #4079ff4d}.test-results-section{display:flex;flex-direction:column;align-items:center;text-align:center;animation:fadeIn .5s ease}.results-title{font-size:3.5rem;margin:0 0 1rem;font-weight:700;background:linear-gradient(90deg,var(--mafia-green),var(--mafia-blue));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.results-score{font-size:1.5rem;color:#fff;margin:1rem 0 2.5rem}.results-score span{font-weight:700;color:var(--mafia-green)}.test-action-btn.finish{width:50%;padding:1rem;font-size:1.2rem;font-weight:600;border:none;border-radius:12px;cursor:pointer;transition:all .2s ease;background-color:var(--mafia-green);color:#000}.test-action-btn.finish:hover{transform:scale(1.03);box-shadow:0 0 15px #40ffaa80;background-color:#40ffaa}@media (max-width: 600px){.test-back-btn{top:1rem;left:1rem;padding:.5rem 1rem;font-size:.9rem}.test-modal{padding:1.5rem;gap:1.5rem;max-height:90vh;overflow-y:auto;width:95%}.test-word,.results-title{font-size:2.2rem}.results-score{font-size:1.2rem}.test-options-grid{grid-template-columns:1fr}.test-action-btn.finish{width:100%}.test-option-btn{font-size:1rem;padding:.8rem}}:root{--mafia-green: #40ffaa;--mafia-blue: #4079ff;--bg-dark: #000}@keyframes gradientMove{0%{background-position:0% 0%}to{background-position:100% 0%}}.teacher-page{width:100vw;height:100vh;background:var(--bg-dark);display:flex;align-items:center;justify-content:center;font-family:Arial,sans-serif;opacity:0;transform:scale(.98);transition:all .45s cubic-bezier(.25,.46,.45,.94);padding:1rem}.teacher-page.visible{opacity:1;transform:scale(1)}.teacher-page-wrapper{position:relative;display:flex;justify-content:center;align-items:center;width:100%;max-width:900px}.teacher-container{width:100%;max-width:900px;background-color:#000000eb;border:2px solid var(--mafia-green);border-radius:20px;padding:3rem;box-shadow:0 0 40px #40ffaa40,0 0 80px #4079ff2e;color:#fff;animation:fadeIn .45s ease-out;position:relative;overflow:hidden}.words-learnt-sidetext{position:absolute;top:50%;left:calc(100% + 2rem);transform:translateY(-50%);white-space:nowrap;font-size:.9rem;font-weight:600;letter-spacing:3px;color:#40ffaa99;text-shadow:0 0 5px rgba(64,255,170,.2);text-transform:uppercase;transition:opacity .3s ease}.revision-toggle-btn{position:absolute;top:3rem;right:3rem;z-index:10;background:#40ffaa1a;border:2px solid var(--mafia-green);color:var(--mafia-green);padding:.6rem 1.2rem;border-radius:10px;font-size:.9rem;font-weight:600;cursor:pointer;transition:all .2s ease;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.revision-toggle-btn:hover{background:#40ffaa33;transform:translateY(-2px);box-shadow:0 4px 15px #40ffaa33}.revision-toggle-btn:disabled{opacity:.5;cursor:not-allowed;background:#6464641a;border-color:#64646480;color:#ffffff80}.revision-toggle-btn:disabled:hover{transform:none;box-shadow:none;background:#6464641a}.reveal-container{display:flex;justify-content:center;align-items:center;min-height:200px;padding:2rem 0}.reveal-btn{padding:1.2rem 2.5rem!important;font-size:1.2rem!important;transform:scale(1.1)}.teacher-header{text-align:center;margin-bottom:2.25rem}.teacher-word{font-size:3.6rem;font-weight:700;margin:0;background:linear-gradient(90deg,var(--mafia-green),var(--mafia-blue));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;background-size:200% 100%;animation:gradientMove 2s ease-in-out infinite alternate}.teacher-content{display:flex;flex-direction:column;gap:1.5rem}.content-section{position:relative;background:#ffffff08;border-radius:12px;padding:1.25rem;border:2px solid rgba(64,255,170,.25);box-shadow:0 0 25px #40ffaa26,0 0 45px #4079ff1a;transition:box-shadow .25s ease}.content-section:hover{box-shadow:0 0 35px #40ffaa40,0 0 65px #4079ff2e}.content-section h3{margin:0 0 .75rem;font-size:1.25rem;color:var(--mafia-green)}.content-section p,.content-section ul{font-size:1.05rem;color:#ffffffdb;line-height:1.6;margin:0}.content-section ul{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:.75rem}.content-section li{background:#40ffaa14;padding:.45rem .9rem;border-radius:12px;font-weight:500}.teacher-actions{display:flex;justify-content:space-between;gap:1rem;margin-top:1.75rem}.action-btn{padding:.95rem 1.8rem;border-radius:12px;border:none;cursor:pointer;font-size:1.05rem;font-weight:600;transition:all .18s ease;display:inline-flex;align-items:center;justify-content:center;box-shadow:0 0 18px #40ffaa1f}.action-btn.primary{background:linear-gradient(45deg,var(--mafia-green),var(--mafia-blue))!important;color:#000}.action-btn.secondary{background:transparent;color:var(--mafia-green);border:3px solid var(--mafia-green)}.action-btn:hover{transform:translateY(-2px);box-shadow:0 0 28px #40ffaa47,0 0 48px #4079ff2e}.back-btn-teacher{position:fixed;top:2rem;left:2rem;z-index:1100;background:#ffffff14;border:4px solid var(--mafia-blue);color:var(--mafia-green);padding:.7rem 1.35rem;border-radius:11px;font-size:1rem;font-weight:500;cursor:pointer;transition:all .18s ease;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);box-shadow:0 0 20px #4079ff33}.back-btn-teacher:hover{background:#ffffff29;border-color:#ffffff59;transform:translateY(-2px);box-shadow:0 0 28px #40ffaa40,0 0 48px #4079ff33}@media (max-width: 1250px){.words-learnt-sidetext{opacity:0;pointer-events:none}}@media (max-width: 768px){.teacher-page-wrapper{flex-direction:column;gap:1.5rem}.words-learnt-sidetext{opacity:1;pointer-events:auto;position:static;transform:none;text-align:center;order:-1;background:#40ffaa0d;padding:.5rem;border-radius:8px;width:100%}.teacher-container{padding:1.5rem}.revision-toggle-btn{top:1.5rem;right:1.5rem;padding:.5rem 1rem;font-size:.8rem}.teacher-word{font-size:2.5rem}.action-btn{font-size:1rem}.back-btn-teacher{top:1rem;left:1rem}}@media (max-width: 480px){.teacher-actions{flex-direction:column-reverse}}.vocabulary-page{width:100vw;height:100vh;background:#000;position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center;opacity:0;transform:translateY(20px);transition:all .5s cubic-bezier(.25,.46,.45,.94)}.vocabulary-page.visible{opacity:1;transform:translateY(0)}.back-btn{position:absolute;top:2rem;left:2rem;background:#40ffaa1a;border:2px solid rgba(64,255,170,.3);color:var(--mafia-green)!important;padding:.75rem 1.5rem;border-radius:10px;cursor:pointer;font-size:1rem;font-weight:600;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:all .3s ease;z-index:100}.back-btn:hover{background:#40ffaa33;border-color:var(--mafia-green);color:#fff!important;transform:translate(-3px)}.hub-container{display:flex;flex-direction:column;align-items:center;text-align:center;padding:2rem;max-width:1000px;animation:fadeIn .8s ease-out}.hub-header{margin-bottom:3rem}.hub-title{font-size:3.5rem;font-weight:700;margin:0;background:linear-gradient(90deg,var(--mafia-green),var(--mafia-blue),var(--mafia-green));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hub-subtitle{font-size:2.4rem;font-weight:600;margin-top:1rem;background:linear-gradient(270deg,#40ffaa,#4079ff,#40ffaa,#4079ff,#40ffaa);background-size:400% 100%;-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;animation:gradientShift 3s ease-in-out infinite}.hub-options-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;width:100%}.hub-option-card{background:#40ffaa0d;border:1px solid rgba(64,255,170,.2);border-radius:15px;padding:2rem;text-align:left;cursor:pointer;transition:all .3s ease;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.hub-option-card:hover{transform:translateY(-5px) scale(1.02);background:#40ffaa1a;border-color:var(--mafia-green);box-shadow:0 10px 30px #40ffaa26}.hub-option-card h2{margin:0 0 1rem;font-size:1.5rem;color:var(--mafia-green);display:flex;align-items:center;gap:.6rem}.hub-option-card p{margin:0;color:#fffc;line-height:1.6}@media (max-width: 768px){.hub-options-grid{grid-template-columns:1fr}.hub-title{font-size:2.5rem}.hub-subtitle{font-size:1.8rem}}.live-indicator{width:12px;height:12px;background-color:red;border-radius:50%;box-shadow:0 0 red;animation:pulse 2s infinite}@keyframes pulse{0%{transform:scale(.95);box-shadow:0 0 #ff0000b3}70%{transform:scale(1);box-shadow:0 0 0 10px #f000}to{transform:scale(.95);box-shadow:0 0 #f000}}.grammar-page{width:100vw;height:100vh;background:var(--bg-dark);position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center;opacity:0;transform:translateY(20px);transition:all .5s cubic-bezier(.25,.46,.45,.94)}.grammar-page.visible{opacity:1;transform:translateY(0)}.grammar-hub-container{display:flex;flex-direction:column;align-items:center;text-align:center;padding:2rem;max-width:1000px;animation:fadeInMenu .8s ease-out}.grammar-hub-header{margin-bottom:3rem}.grammar-hub-title{font-size:3.5rem;font-weight:700;margin:0;background:linear-gradient(90deg,var(--mafia-green),var(--mafia-blue),var(--mafia-green));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;background-size:200% 100%;animation:gradientShift 4s ease-in-out infinite}.grammar-hub-subtitle{font-size:1.8rem;font-weight:500;margin-top:1rem;background:linear-gradient(270deg,#a1ffc3,#a9e0ff,#a1ffc3);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.grammar-hub-options-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;width:100%}.grammar-hub-option-card{background:#00ff840d;border:1px solid rgba(0,255,132,.2);border-radius:15px;padding:2rem;text-align:left;cursor:pointer;transition:all .3s ease;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.grammar-hub-option-card:hover{transform:translateY(-5px) scale(1.02);background:#00ff841a;border-color:var(--mafia-green);box-shadow:0 10px 30px #00ff8426}.grammar-hub-option-card h2{margin:0 0 1rem;font-size:1.5rem;color:var(--mafia-green);display:flex;align-items:center;gap:.6rem}.grammar-hub-option-card p{margin:0;color:var(--text-light);line-height:1.6}.grammar-study-container{max-width:1100px;max-height:850px;padding:2.5rem;width:90%;height:90vh;background-color:#040d0a;border:1px solid rgba(0,255,132,.3);border-radius:20px;color:#fff;box-shadow:0 0 40px #00ff8433,inset 0 0 15px #00ff841a;animation:fadeInStudy .6s ease-out;display:flex;flex-direction:column}.grammar-main-content{flex:1;display:flex;align-items:center;justify-content:center;overflow:hidden;width:100%}.rule-section{padding:1.8rem 2.2rem;background:#00ff840d;border:2px solid var(--mafia-green);border-radius:15px;width:100%;animation:fadeInStep .5s ease-out;box-sizing:border-box;flex-shrink:0}.grammar-navigation{display:flex;justify-content:space-between;align-items:center;margin-top:1.5rem;border-top:1px solid rgba(0,255,132,.2);padding-top:1.5rem}@keyframes fadeInMenu{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}@media (max-width: 768px){.grammar-hub-options-grid,.options-grid{grid-template-columns:1fr}.grammar-study-container{padding:1.5rem}.rule-concept{font-size:1.8rem}}:root{--mafia-green: #00ff84;--mafia-blue: #00ffff;--bg-dark: #000;--text-light: rgba(255, 255, 255, .85);--text-dim: rgba(255, 255, 255, .6);--flaw-red: #ff4d6d}.rule-page{width:100vw;height:100vh;background:var(--bg-dark);position:fixed;top:0;left:0;overflow:hidden;display:flex;align-items:center;justify-content:center;opacity:0;transform:translateY(20px);transition:all .5s cubic-bezier(.25,.46,.45,.94);z-index:50}.rule-page.visible{opacity:1;transform:translateY(0)}.back-btn{position:absolute;top:2rem;left:2rem;background:#00ff841a;border:2px solid rgba(0,255,132,.3);color:var(--mafia-green)!important;padding:.75rem 1.5rem;border-radius:10px;cursor:pointer;font-size:1rem;font-weight:600;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:all .3s ease;z-index:100}.back-btn:hover{background:#00ff8433;border-color:var(--mafia-green);color:#fff!important;transform:translate(-3px)}.rule-page-container{max-width:1100px;max-height:850px;padding:2.5rem;width:90%;height:90vh;background-color:#040d0a;border:1px solid rgba(0,255,132,.3);border-radius:20px;color:#fff;box-shadow:0 0 40px #00ff8433,inset 0 0 15px #00ff841a;animation:fadeInStudy .6s ease-out;display:flex;flex-direction:column}.rule-header{text-align:center;margin-bottom:2rem}.rule-concept{font-size:2.5rem;font-weight:600;color:var(--mafia-green);margin:0}.rule-counter{font-size:.9rem;color:var(--text-dim);margin-top:.5rem}.rule-main-content{flex:1;display:flex;align-items:center;justify-content:center;width:100%;min-height:0;overflow-y:auto;padding-right:1rem}.rule-section{padding:1.8rem 2.2rem;background:#00ff840d;border-left:4px solid var(--mafia-green);border-radius:8px;width:100%;animation:fadeInStep .5s ease-out}.rule-section h3{font-size:1.9rem;color:#fff;margin:0 0 1.2rem}.rule-section p,.rule-section li{font-size:1.8rem;line-height:1.8;color:var(--text-light)}.rule-section ul{list-style-type:"✓ ";padding-left:20px;margin:0}.mistake-item{border-left:2px solid var(--flaw-red);padding-left:1rem;margin-bottom:1rem}.mistake-item .flawed{color:var(--text-dim)}.mistake-item .corrected{color:var(--mafia-green)}.flaw-highlight{color:var(--flaw-red);font-weight:600;background-color:#ff4d6d1a;padding:0 3px;border-radius:4px}.question-view-container{animation:fadeInStep .5s ease;width:100%}.question-title{font-size:1.6rem;margin-bottom:2rem;text-align:center}.options-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.2rem}.option-button{font-size:1.1rem;padding:1.2rem;width:100%;border-radius:8px;border:1px solid rgba(0,255,132,.4);background:#00ff841a;color:#e0e0e0;cursor:pointer;text-align:left;transition:all .2s ease;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.option-button:hover:not(:disabled){background:#00ff8433;transform:translateY(-2px)}.option-button.correct{background:#00ff844d;border-color:var(--mafia-green);color:#fff;transform:scale(1.02)}.rule-navigation{display:flex;justify-content:space-between;align-items:center;margin-top:1.5rem;border-top:1px solid rgba(0,255,132,.2);padding-top:1.5rem}.nav-btn{font-size:1.1rem;padding:1rem 2rem;border-radius:12px;border:none;cursor:pointer;font-weight:600;transition:all .2s ease}.nav-btn.primary{background:linear-gradient(45deg,var(--mafia-green),var(--mafia-blue));color:#000}.nav-btn.secondary{background:transparent;color:var(--mafia-green);border:2px solid var(--mafia-green)}.nav-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 10px 25px #00ff8433}.nav-btn:disabled{opacity:.5;cursor:not-allowed}.nav-btn:disabled:hover{transform:none;box-shadow:none}@keyframes fadeInStudy{0%{opacity:0;transform:scale(.98)}to{opacity:1;transform:scale(1)}}@keyframes fadeInStep{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 768px){.options-grid{grid-template-columns:1fr}.rule-page-container{padding:1.5rem}.rule-concept{font-size:1.8rem}}.rule-main-content::-webkit-scrollbar{width:8px}.rule-main-content::-webkit-scrollbar-track{background:#040d0a80;border-radius:10px}.rule-main-content::-webkit-scrollbar-thumb{background:linear-gradient(to bottom,var(--mafia-blue),var(--mafia-green));border-radius:10px;border:1px solid rgba(0,0,0,.3)}.rule-main-content::-webkit-scrollbar-thumb:hover{background:linear-gradient(to bottom,#3ff,#3f9)}:root{--mafia-purple: #8400ff;--mafia-blue: #4079ff}.comprehension-page{width:100vw;height:100vh;background:#000;position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center;opacity:0;transform:translateY(20px);transition:all .5s cubic-bezier(.25,.46,.45,.94)}.comprehension-page.visible{opacity:1;transform:translateY(0)}.back-btn{position:absolute;top:2rem;left:2rem;background:#8400ff1a;border:2px solid rgba(132,0,255,.3);color:var(--mafia-purple)!important;padding:.75rem 1.5rem;border-radius:10px;cursor:pointer;font-size:1rem;font-weight:600;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:all .3s ease;z-index:100}.back-btn:hover{background:#8400ff33;border-color:var(--mafia-purple);color:#fff!important;transform:translate(-3px)}.comprehension-hub-container{display:flex;flex-direction:column;align-items:center;text-align:center;padding:2rem;max-width:1000px;animation:fadeIn .8s ease-out}@keyframes fadeIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}.comprehension-hub-header{margin-bottom:3rem}.comprehension-hub-title{font-size:3.5rem;font-weight:700;margin:0;background:linear-gradient(90deg,var(--mafia-purple),var(--mafia-blue),var(--mafia-purple));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;background-size:200% 100%;animation:gradientShift 4s ease-in-out infinite}.comprehension-hub-subtitle{font-size:1.8rem;font-weight:500;margin-top:1rem;background:linear-gradient(270deg,#c3a1ff,#a9c7ff,#c3a1ff);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.comprehension-hub-options-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;width:100%}.comprehension-hub-option-card{background:#8400ff0d;border:1px solid rgba(132,0,255,.2);border-radius:15px;padding:2rem;text-align:left;cursor:pointer;transition:all .3s ease;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.comprehension-hub-option-card:hover{transform:translateY(-5px) scale(1.02);background:#8400ff1a;border-color:var(--mafia-purple);box-shadow:0 10px 30px #8400ff26}.comprehension-hub-option-card h2{margin:0 0 1rem;font-size:1.5rem;color:var(--mafia-purple);display:flex;align-items:center;gap:.6rem}.comprehension-hub-option-card p{margin:0;color:#fffc;line-height:1.6}@media (max-width: 768px){.comprehension-hub-options-grid{grid-template-columns:1fr}.comprehension-hub-title{font-size:2.5rem}.comprehension-hub-subtitle{font-size:1.5rem}}.sentence-study-page{width:100vw;height:100vh;background:var(--bg-dark);display:flex;flex-direction:column;align-items:center;justify-content:center;font-family:Arial,sans-serif;animation:fadeIn .45s ease-out;position:fixed;top:0;left:0;z-index:1000}.sentence-counter{position:absolute;top:2rem;right:2rem;z-index:1100;background:#8400ff26;border:2px solid rgba(132,0,255,.4);color:#ffffffe6;padding:.75rem 1.5rem;border-radius:11px;font-size:1rem;font-weight:600;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);box-shadow:0 4px 15px #8400ff33}.sentence-study-container{width:90%;max-width:900px;background-color:#0a011a;border:1px solid rgba(132,0,255,.3);border-radius:20px;padding:3rem;color:#fff;box-shadow:0 0 40px #8400ff33,inset 0 0 15px #8400ff1a}.sentence-display{padding:2rem;margin-bottom:2rem;border-radius:15px;background:#0000004d;border:1px solid rgba(132,0,255,.2);min-height:150px;display:flex;align-items:center;justify-content:center}.sentence-text{font-size:2.2rem;font-weight:500;color:#ffffffe6;line-height:1.6;text-align:center}.question-view-container{padding:1rem;display:flex;flex-direction:column;gap:2rem}.sentence-study-actions{display:flex;justify-content:space-between;align-items:center;gap:1rem;margin-top:1.5rem}.action-btn:disabled{opacity:.5;cursor:not-allowed}@media (max-width: 768px){.sentence-study-container{padding:2rem;width:95%}.sentence-text{font-size:1.5rem}.question-title{font-size:1.2rem}.options-container{grid-template-columns:1fr}.action-btn{padding:.8rem 1.2rem;font-size:1rem}.sentence-counter{top:1rem;right:1rem;padding:.5rem 1rem;font-size:.9rem}.back-btn-study{top:1rem;left:1rem;padding:.5rem 1rem;font-size:.9rem}}:root{--mafia-purple: #8400ff;--mafia-blue: #4079ff;--bg-dark: #000}@keyframes gradientShift{0%{background-position:0% 0%}50%{background-position:100% 0%}to{background-position:0% 0%}}.paragraph-study-page{width:100vw;height:100vh;background:var(--bg-dark);display:flex;flex-direction:column;align-items:center;justify-content:center;font-family:Arial,sans-serif;animation:fadeIn .45s ease-out;position:fixed;top:0;left:0;z-index:1000;overflow-y:auto;padding:2rem 0}.top-right-controls{position:absolute;top:2rem;right:2rem;z-index:1100;display:flex;flex-direction:column;align-items:flex-end;gap:.5rem}.item-counter{background:#8400ff26;border:2px solid rgba(132,0,255,.4);color:#ffffffe6;padding:.75rem 1.5rem;border-radius:11px;font-size:1rem;font-weight:600;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);box-shadow:0 4px 15px #8400ff33}.skip-container{display:flex;gap:.5rem;align-items:center}.skip-btn{background:#4079ff33;border:2px solid rgba(64,121,255,.5);color:#a9c7ff;padding:.5rem 1rem;border-radius:8px;font-size:.9rem;font-weight:500;cursor:pointer;transition:all .2s ease}.skip-btn:hover{background:#4079ff4d;border-color:#4079ff;color:#fff}.skip-input{width:60px;padding:.5rem;background:#00000080;border:2px solid rgba(64,121,255,.5);color:#fff;border-radius:8px;text-align:center;font-size:1rem;font-weight:700;-moz-appearance:textfield}.skip-input::-webkit-outer-spin-button,.skip-input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.paragraph-study-container{width:90%;max-width:900px;background-color:#0a011a;border:1px solid rgba(132,0,255,.3);border-radius:20px;padding:2rem 3rem;color:#fff;box-shadow:0 0 40px #8400ff33,inset 0 0 15px #8400ff1a;display:flex;flex-direction:column}.paragraph-display{padding:1rem;margin-bottom:2rem;border-radius:15px;background:#0000004d;border:1px solid rgba(132,0,255,.2);max-height:250px;overflow-y:auto}.paragraph-text{font-size:1.1rem;font-weight:400;color:#ffffffd9;line-height:1.8;text-align:left}.highlighted-word{font-weight:700;background:linear-gradient(90deg,#40ffaa,#4079ff,#40ffaa,#4079ff,#40ffaa);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;background-size:300% 100%;animation:gradientShift 4s ease-in-out infinite}.study-view-container{min-height:250px;display:flex;flex-direction:column}.study-tabs{display:flex;gap:.5rem;margin-bottom:1.5rem;border-bottom:1px solid rgba(132,0,255,.2)}.tab-btn{padding:.8rem 1.5rem;background:transparent;border:none;border-bottom:3px solid transparent;color:#fff9;cursor:pointer;font-size:1rem;font-weight:600;transition:all .2s ease;margin-bottom:-1px}.tab-btn:hover{color:#fff;background:#8400ff1a}.tab-btn.active{color:#fff;border-bottom-color:var(--mafia-purple)}.definitions-list{list-style:none;padding:0;margin:0;max-height:200px;overflow-y:auto;animation:fadeIn .3s ease}.definitions-list li{padding:1rem 0;border-bottom:1px solid rgba(132,0,255,.15)}.definitions-list 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ease}.heatmap-cell:hover:not(.empty){transform:scale(1.2);outline:1px solid white}.heatmap-cell.empty{background-color:transparent}.level-0{background-color:#40ffaa1a}.level-1{background-color:#40ffaa4d}.level-2{background-color:#40ffaa80}.level-3{background-color:#40ffaacc}.level-4{background-color:#40ffaa}.heatmap-month-labels{display:flex;justify-content:space-around;margin-top:.5rem;padding-left:3rem;font-size:.75rem;color:#fff9}.month-label{flex:1;text-align:center}@media (max-width: 768px){.heatmap-grid-wrapper{gap:.5rem}.heatmap-grid{gap:2px}.heatmap-day-labels{font-size:.6rem}.heatmap-container{padding:1rem;overflow-x:auto}.heatmap-header{flex-direction:column;align-items:flex-start;gap:1rem}}