@keyframes studentFadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes studentSlideDown{0%{opacity:0;transform:translateY(-30px)}to{opacity:1;transform:translateY(0)}}@keyframes studentPulse{0%,to{transform:scale(1)}50%{transform:scale(1.02)}}@keyframes studentFloat{0%,to{transform:translateY(0)}50%{transform:translateY(-6px)}}@keyframes studentGradientShift{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}@keyframes studentShimmer{0%{background-position:-200% center}to{background-position:200% center}}@keyframes studentScoreReveal{0%{opacity:0;transform:scale(.5)}to{opacity:1;transform:scale(1)}}@keyframes studentProgressFill{0%{width:0}}@keyframes studentBounceIn{0%{opacity:0;transform:scale(.3)}50%{transform:scale(1.05)}70%{transform:scale(.95)}to{opacity:1;transform:scale(1)}}.student-app{max-width:640px;margin:0 auto;padding:16px;min-height:100vh;font-size:16px;background:linear-gradient(180deg,#f8f9ff,#f0f2f5);position:relative}.student-app:before{content:"";position:fixed;top:0;left:0;right:0;height:300px;background:none;pointer-events:none;z-index:0}.student-top-bar{position:fixed;top:0;left:0;right:0;z-index:1000;display:flex;align-items:center;justify-content:space-between;padding:12px 16px;pointer-events:none;animation:studentSlideDown .4s ease-out}.student-top-bar-left,.student-top-bar-right{display:flex;align-items:center;gap:8px;pointer-events:auto}.student-top-bar-right{margin-left:auto}.student-top-bar .ant-btn{border-radius:12px;box-shadow:0 2px 8px #0000001a}.student-app .ant-input,.student-app .ant-btn{font-size:16px;min-height:44px;border-radius:12px}.student-app .ant-btn-lg{min-height:52px;font-size:18px;border-radius:14px;font-weight:600}.student-app .ant-btn-primary{background:linear-gradient(135deg,#4361ee,#3a0ca3);border:none;box-shadow:0 4px 14px #4361ee59;transition:all 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.anticon{font-size:32px;color:#fff}.student-auth-title{font-size:24px!important;font-weight:800!important;color:#1a1a2e!important;margin-bottom:6px!important;letter-spacing:-.5px}.student-auth-subtitle{color:#8c8c8c;font-size:15px}.student-auth-card{border-radius:20px!important;border:1px solid rgba(0,0,0,.06)!important;box-shadow:0 8px 32px #00000014!important;overflow:hidden}.student-auth-card .ant-card-body{padding:28px 24px!important}.student-auth-card .ant-tabs-nav{margin-bottom:24px!important}.student-auth-card .ant-form-item-label>label{font-weight:600;color:#333}.student-auth-footer{text-align:center;margin-top:16px;padding:12px;background:#4361ee0a;border-radius:12px}.student-entry{padding:80px 16px 40px;text-align:center;position:relative;z-index:1;animation:studentFadeInUp .6s ease-out}.student-entry-hero{margin-bottom:40px}.student-entry-badge{width:88px;height:88px;border-radius:24px;background:linear-gradient(135deg,#4361ee,#7b2ff7);display:flex;align-items:center;justify-content:center;margin:0 auto 24px;box-shadow:0 12px 32px #4361ee4d;animation:studentFloat 3s ease-in-out infinite}.student-entry-badge .anticon{font-size:40px;color:#fff}.student-entry-title{font-size:26px!important;font-weight:800!important;color:#1a1a2e!important;margin-bottom:8px!important;letter-spacing:-.5px}.student-entry-work-title{font-size:16px;color:#8c8c8c;margin-bottom:20px;display:block}.student-entry-student{display:inline-flex;align-items:center;gap:10px;padding:12px 24px;background:#fff;border-radius:16px;border:1px solid #f0f0f0;box-shadow:0 2px 12px #0000000f}.student-entry-student-icon{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#4361ee20,#7b2ff720);display:flex;align-items:center;justify-content:center}.student-entry-student-icon .anticon{font-size:18px;color:#4361ee}.student-entry-student-name{font-size:18px;font-weight:700;color:#1a1a2e}.student-entry-start-btn{margin-top:40px}.student-entry-start-btn .ant-btn{height:56px!important;font-size:18px!important;font-weight:700!important;border-radius:16px!important;background:linear-gradient(135deg,#4361ee,#3a0ca3)!important;border:none!important;box-shadow:0 8px 24px #4361ee59!important;transition:all .3s ease!important}.student-entry-start-btn .ant-btn:hover{box-shadow:0 12px 32px #4361ee73!important;transform:translateY(-2px)!important}.student-test{padding-top:16px;position:relative;z-index:1;animation:studentFadeInUp .5s ease-out}.student-test-header{text-align:center;margin-bottom:20px;padding:16px;background:#fff;border-radius:16px;border:1px solid #f0f0f0;box-shadow:0 2px 8px #0000000a}.student-test-variant-title{font-size:20px!important;font-weight:800!important;color:#1a1a2e!important;margin-bottom:4px!important}.student-test-title{display:block;font-size:15px;font-weight:600;color:#4f5b7a;margin-bottom:2px}.student-test-meta{color:#8c8c8c;font-size:14px}.student-test-progress{margin-bottom:16px;padding:0 4px}.student-test-progress-bar{height:6px;background:#f0f0f0;border-radius:3px;overflow:hidden}.student-test-progress-fill{height:100%;background:linear-gradient(90deg,#4361ee,#7b2ff7);border-radius:3px;transition:width .4s ease}.student-test-progress-text{display:flex;justify-content:space-between;margin-top:6px;font-size:12px;color:#8c8c8c;font-weight:500}.student-app .task-item{background:#fff;border-radius:16px;padding:20px;margin-bottom:14px;box-shadow:0 2px 12px #0000000d;border:1px solid #f0f0f0;transition:all .3s ease;animation:studentFadeInUp .5s ease-out both}.student-app .task-item:hover{box-shadow:0 4px 16px #00000014}.student-app .task-number{font-weight:800;font-size:14px;color:#4361ee;margin-bottom:10px;display:inline-flex;align-items:center;gap:6px;padding:4px 12px;background:#4361ee14;border-radius:8px}.student-app .task-statement{margin-bottom:14px;line-height:1.7;font-size:16px;color:#333}.student-app .task-statement img{max-width:100%;height:auto;border-radius:12px;margin-top:8px}.student-app .task-answer-input{font-size:18px!important;min-height:50px!important;border-radius:12px!important;border:2px solid #e8e8e8!important;font-weight:500;transition:all .3s ease!important}.student-app .task-answer-input:focus{border-color:#4361ee!important;box-shadow:0 0 0 3px #4361ee1a!important}.student-app .task-item--filled{border-color:#52c41a4d}.student-app .task-item--filled .task-answer-input{border-color:#52c41a66!important}.student-app .submit-bar{position:sticky;bottom:0;background:#ffffffe6;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);padding:14px 0;border-top:1px solid rgba(0,0,0,.06);z-index:10}.student-app .submit-bar .ant-btn{height:52px!important;font-size:17px!important;font-weight:700!important;border-radius:14px!important}.student-app .katex{font-size:1.05em}.student-result{padding:20px 0;position:relative;z-index:1}.student-result-header{text-align:center;margin-bottom:8px;animation:studentSlideDown .5s ease-out}.student-result-title{font-size:22px!important;font-weight:800!important;color:#1a1a2e!important;margin-bottom:4px!important}.student-result-test-title{display:block;font-size:15px;font-weight:600;color:#4f5b7a;margin-bottom:2px}.student-result-meta{color:#8c8c8c;font-size:14px}.student-result-score-card{text-align:center;padding:32px 24px;margin:20px 0 24px;background:#fff;border-radius:20px;box-shadow:0 4px 20px #0000000f;border:1px solid #f0f0f0;animation:studentBounceIn .6s ease-out}.student-result-score-value{font-size:56px;font-weight:900;line-height:1;letter-spacing:-2px;animation:studentScoreReveal .8s ease-out .2s both}.student-result-score-value.good{color:#52c41a}.student-result-score-value.ok{color:#faad14}.student-result-score-value.bad{color:#ff4d4f}.student-result-score-label{font-size:16px;color:#8c8c8c;margin-top:8px;font-weight:500}.student-result-score-bar{max-width:280px;margin:16px auto 0;height:8px;background:#f0f0f0;border-radius:4px;overflow:hidden}.student-result-score-bar-fill{height:100%;border-radius:4px;transition:width 1.2s ease-out;animation:studentProgressFill 1.2s ease-out}.student-result-score-bar-fill.good{background:linear-gradient(90deg,#52c41a,#73d13d)}.student-result-score-bar-fill.ok{background:linear-gradient(90deg,#faad14,#ffc53d)}.student-result-score-bar-fill.bad{background:linear-gradient(90deg,#ff4d4f,#ff7875)}.student-result-summary{text-align:center;margin-bottom:24px;font-size:17px;animation:studentFadeInUp .5s ease-out .4s both}.student-result-summary--perfect{color:#52c41a;font-weight:600}.student-result-gallery-btn{text-align:center;margin:24px 0;animation:studentFadeInUp .5s ease-out .6s both}.student-result-gallery-btn .ant-btn{border-radius:14px!important;height:48px!important;font-weight:600!important;border:2px dashed #d9d9d9!important;color:#666!important;transition:all .3s ease!important}.student-result-gallery-btn .ant-btn:hover{border-color:#4361ee!important;color:#4361ee!important;background:#4361ee0a!important}.student-result-errors-title{text-align:center;margin:32px 0 16px;font-size:16px;font-weight:700;color:#ff4d4f;display:flex;align-items:center;justify-content:center;gap:8px}.student-result-errors-title:before,.student-result-errors-title:after{content:"";flex:1;height:1px;background:linear-gradient(90deg,transparent,#ffccc7,transparent)}.student-app .error-task{background:#fff;border:1px solid #ffccc7;border-left:4px solid #ff4d4f;border-radius:14px;padding:18px;margin-bottom:12px;animation:studentFadeInUp .4s ease-out both}.student-app .correct-badge{color:#52c41a;font-weight:700;background:#52c41a14;padding:2px 8px;border-radius:6px}.student-app .wrong-badge{color:#ff4d4f;font-weight:700;background:#ff4d4f14;padding:2px 8px;border-radius:6px;text-decoration:line-through}.student-app .result-score{display:none}.achievement-section,.unlocked-section{margin:28px 0;padding:28px;border-radius:20px;border:1px solid rgba(0,0,0,.06);position:relative;overflow:hidden}.achievement-section{background:linear-gradient(135deg,#fff9fc,#fff5f7);border-color:#f5576c26}.unlocked-section{background:linear-gradient(135deg,#f8f9ff,#f0f2ff);border-color:#667eea26}.achievement-reveal{animation:sectionReveal .6s cubic-bezier(.34,1.56,.64,1) forwards;opacity:0;transform:translateY(20px)}@keyframes sectionReveal{to{opacity:1;transform:translateY(0)}}.achievement-header{text-align:center;margin-bottom:24px}.achievement-section-title{font-weight:800!important;font-size:24px!important;background:linear-gradient(135deg,#4361ee,#7b2ff7);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin:0!important;letter-spacing:-.5px}.unlocked-achievements-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;justify-items:center}.achievement-badge{position:relative;display:inline-flex;flex-direction:column;align-items:center;padding:24px;border-radius:20px;background:#fff;box-shadow:0 4px 20px #0000000f;transition:all .3s cubic-bezier(.34,1.56,.64,1);overflow:visible;opacity:0;transform:translateY(-100px) scale(.3) rotate(-10deg)}.achievement-badge.visible{animation:badgeDrop .8s cubic-bezier(.34,1.56,.64,1) forwards}@keyframes badgeDrop{0%{opacity:0;transform:translateY(-100px) scale(.3) rotate(-10deg)}60%{opacity:1;transform:translateY(10px) scale(1.05) rotate(2deg)}80%{transform:translateY(-5px) scale(.98) rotate(-1deg)}to{opacity:1;transform:translateY(0) scale(1) rotate(0)}}.achievement-badge:hover{transform:translateY(-8px) scale(1.05);box-shadow:0 12px 40px #0000001f}.achievement-badge-small{padding:16px;min-width:140px}.achievement-badge-medium{padding:20px;min-width:200px}.achievement-badge-large{padding:32px;min-width:280px}.achievement-glow{position:absolute;top:50%;left:50%;width:100%;height:100%;transform:translate(-50%,-50%);border-radius:20px;opacity:0;transition:opacity .3s;pointer-events:none;z-index:-1}.achievement-badge.visible .achievement-glow{animation:glowPulse 2s ease-in-out infinite}@keyframes glowPulse{0%,to{opacity:.3;transform:translate(-50%,-50%) scale(1)}50%{opacity:.6;transform:translate(-50%,-50%) scale(1.1)}}.achievement-badge.common .achievement-glow{background:radial-gradient(circle,rgba(82,196,26,.4) 0%,transparent 70%);box-shadow:0 0 60px #52c41a99}.achievement-badge.rare .achievement-glow{background:radial-gradient(circle,rgba(67,97,238,.5) 0%,transparent 70%);box-shadow:0 0 80px #4361eeb3}.achievement-badge.legendary .achievement-glow{background:radial-gradient(circle,rgba(255,215,0,.6) 0%,transparent 70%);box-shadow:0 0 100px #ffd700cc;animation:legendaryGlow 1.5s ease-in-out infinite}@keyframes legendaryGlow{0%,to{opacity:.4;transform:translate(-50%,-50%) scale(1)}50%{opacity:.8;transform:translate(-50%,-50%) scale(1.2)}}.achievement-badge.common{border:2px solid rgba(82,196,26,.25);background:linear-gradient(135deg,#fff,#f0fdf4)}.achievement-badge.rare{border:2px solid rgba(67,97,238,.3);background:linear-gradient(135deg,#fff,#f0f4ff)}.achievement-badge.legendary{border:2px solid rgba(255,215,0,.4);background:linear-gradient(135deg,#fff,#fffbeb);box-shadow:0 4px 20px #ffd70026,0 0 40px #ffd70014}.achievement-icon-wrapper{position:relative;margin-bottom:16px;filter:drop-shadow(0 4px 12px rgba(0,0,0,.12))}.achievement-badge.visible .achievement-icon-wrapper{animation:iconBounce .6s cubic-bezier(.34,1.56,.64,1) .3s backwards}@keyframes iconBounce{0%{transform:scale(0) rotate(-180deg)}60%{transform:scale(1.2) rotate(10deg)}to{transform:scale(1) rotate(0)}}.achievement-icon{display:block;border-radius:16px;object-fit:contain;transition:transform .3s cubic-bezier(.34,1.56,.64,1)}.achievement-badge:hover .achievement-icon{transform:scale(1.1) rotate(5deg)}.achievement-details{text-align:center;width:100%}.achievement-title{font-weight:700!important;margin:8px 0 6px!important;color:#1a1a2e;letter-spacing:-.3px}.achievement-description{display:block;font-size:14px!important;line-height:1.5;color:#666;margin-top:4px}.achievement-rarity{margin-top:12px;padding:6px 16px;border-radius:20px;display:inline-block;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.5px}.rarity-common{background:linear-gradient(135deg,#52c41a,#73d13d);color:#fff;box-shadow:0 2px 8px #52c41a4d}.rarity-rare{background:linear-gradient(135deg,#4361ee,#7b2ff7);color:#fff;box-shadow:0 2px 8px #4361ee66}.rarity-legendary{background:linear-gradient(135deg,#f093fb,#f5576c);color:#fff;box-shadow:0 2px 8px #f093fb66;animation:rarityShine 2s ease-in-out infinite}@keyframes rarityShine{0%,to{filter:brightness(1)}50%{filter:brightness(1.15)}}.achievement-badge.locked{opacity:.5;filter:grayscale(.8);cursor:not-allowed}.achievement-badge.locked:hover{transform:none;box-shadow:0 4px 20px #0000000f}.achievement-lock-overlay{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:10;color:#999;background:transparent}.achievement-locked-text{display:block;font-size:12px!important;margin-top:8px;color:#999}.confetti-container{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:100;overflow:visible}.confetti-piece{position:absolute;width:10px;height:10px;top:-20px;opacity:1;animation:confettiFall 1.5s ease-out forwards}@keyframes confettiFall{0%{transform:translateY(0) rotate(0);opacity:1}to{transform:translateY(400px) rotate(720deg);opacity:0}}.achievement-badge.legendary.visible:before,.achievement-badge.legendary.visible:after{content:"";position:absolute;font-size:24px;animation:sparkle 2s ease-in-out infinite;pointer-events:none}.achievement-badge.legendary.visible:before{top:-10px;right:-10px;animation-delay:0s}.achievement-badge.legendary.visible:after{bottom:-10px;left:-10px;animation-delay:1s}@keyframes sparkle{0%,to{opacity:0;transform:scale(0) rotate(0)}50%{opacity:1;transform:scale(1) rotate(180deg)}}.achievement-gallery{padding:20px 4px;max-width:1000px;margin:0 auto;position:relative;z-index:1;animation:studentFadeInUp .5s ease-out}.achievement-gallery-header{text-align:center;margin-bottom:28px}.achievement-gallery-title{font-size:24px!important;font-weight:800!important;color:#1a1a2e!important;letter-spacing:-.5px;display:flex;align-items:center;justify-content:center;gap:10px}.achievement-gallery-title .anticon{color:#faad14}.achievement-stats{background:#fff;padding:24px;border-radius:20px;margin-bottom:24px;border:1px solid #f0f0f0;box-shadow:0 4px 16px #0000000a}.achievement-stats-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-bottom:24px}@media (max-width: 768px){.achievement-stats-grid{grid-template-columns:1fr}}.achievement-stats-content{display:flex;align-items:center;gap:24px}@media (max-width: 480px){.achievement-stats-content{flex-direction:column;gap:16px}}.achievement-stats-ring .ant-progress-text{font-size:18px!important;font-weight:800!important;color:#1a1a2e!important}.achievement-stats-info{flex:1}.achievement-stats-title{font-size:18px!important;font-weight:700!important;color:#1a1a2e!important;margin-bottom:4px!important}.achievement-stats-subtitle{color:#8c8c8c;font-size:14px}.achievement-gallery-filters{margin-bottom:24px;display:flex;flex-direction:column;gap:12px}.achievement-gallery-filter-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.achievement-gallery-filter-label{font-weight:700;color:#333;font-size:14px;min-width:70px}.achievement-gallery-legend{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:14px}.achievement-legend-item{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:#3f4a69}.achievement-legend-dot{width:14px;height:14px;border-radius:50%;display:inline-block;flex-shrink:0;box-shadow:0 0 0 2px #fffffff2,0 2px 6px #00000029}.achievement-legend-dot--current{background:#22c55e}.achievement-legend-dot--total{background:#3b82f6}.achievement-legend-lock{width:14px;height:14px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;color:#6b7280}.achievement-legend-lock .anticon{font-size:13px}.achievement-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px;margin-top:8px;align-items:stretch}@media (max-width: 480px){.achievement-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:14px}}.achievement-gallery-item{position:relative;height:100%}.achievement-earned-dot{position:absolute;top:11px;right:11px;z-index:2;width:14px;height:14px;border-radius:50%;box-shadow:0 0 0 2px #fffffff5,0 2px 6px #0003}.achievement-earned-dot--current{background:#22c55e}.achievement-earned-dot--total{background:#3b82f6}.achievement-earned-lock{position:absolute;top:9px;right:9px;z-index:2;width:18px;height:18px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;color:#6b7280;background:#fffffff5;box-shadow:0 2px 6px #0003}.achievement-earned-lock .anticon{font-size:12px}.achievement-gallery .achievement-badge{opacity:1;transform:translateY(0) scale(1) rotate(0);animation:none;width:100%;min-width:0;max-width:none;height:100%;min-height:360px;justify-content:flex-start;padding:22px 20px;border-radius:18px}.achievement-gallery .achievement-badge.visible,.achievement-gallery .achievement-icon-wrapper,.achievement-gallery .achievement-badge.visible .achievement-icon-wrapper{animation:none}.achievement-gallery .achievement-badge .achievement-glow{animation:none;opacity:.2}.achievement-gallery .achievement-lock-overlay{display:none}.achievement-gallery 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