:root{--color-primary: hsl(220, 90%, 55%);--color-secondary: hsl(35, 95%, 60%);--color-accent: hsl(280, 80%, 60%);--color-success: hsl(150, 80%, 45%);--color-danger: hsl(340, 85%, 60%);--color-bg-dark: hsl(240, 30%, 10%);--color-bg-card: hsl(240, 25%, 15%);--color-bg-hover: hsl(240, 25%, 20%);--color-text-light: hsl(240, 100%, 98%);--color-text-dim: hsl(240, 20%, 70%);--glass-bg: rgba(255, 255, 255, .05);--glass-border: rgba(255, 255, 255, .1);--glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, .3);--radius-lg: 24px;--radius-md: 16px;--radius-sm: 8px;--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 48px;--font-family-base: "Segoe UI", system-ui, sans-serif;--font-family-heading: "Segoe UI", system-ui, sans-serif}body{background-color:var(--color-bg-dark);color:var(--color-text-light);font-family:var(--font-family-base);margin:0;min-height:100vh;overflow-x:hidden;line-height:1.6}h1,h2,h3,h4,h5,h6{font-family:var(--font-family-heading);margin-top:0;line-height:1.2}*,*:before,*:after{box-sizing:border-box}button{cursor:pointer;font-family:inherit}a{color:var(--color-primary);text-decoration:none}.layout{display:flex;height:100vh;width:100vw;background-color:var(--color-bg-dark)}.sidebar{width:250px;background-color:var(--color-bg-card);padding:var(--spacing-md);display:flex;flex-direction:column;border-right:1px solid var(--glass-border)}.logo{font-size:24px;font-weight:700;color:var(--color-primary);margin-bottom:var(--spacing-xl);display:flex;align-items:center;gap:var(--spacing-sm)}.nav-link{display:block;padding:var(--spacing-md);border-radius:var(--radius-md);color:var(--color-text-dim);margin-bottom:var(--spacing-sm);transition:all .2s ease}.nav-link:hover{background-color:var(--color-bg-hover);color:var(--color-text-light);transform:translate(4px)}.main-content{flex:1;display:flex;flex-direction:column;overflow:hidden}.top-bar{height:80px;display:flex;align-items:center;justify-content:space-between;padding:0 var(--spacing-xl);background-color:transparent}.top-bar-left{display:flex;align-items:center;gap:30px}.top-bar-right{display:flex;align-items:center;gap:20px}.lang-toggle-btn{cursor:pointer;border-radius:var(--radius-md);font-weight:600;transition:all .2s ease;display:flex;align-items:center;gap:8px;font-size:.85rem;outline:none}.student-lang-btn{background:#ffffff1a;border:1px solid var(--glass-border);color:#fff;padding:6px 15px}.student-lang-btn:hover{background:#fff3;border-color:var(--color-primary)}.user-profile{display:flex;align-items:center;gap:var(--spacing-lg);background:var(--glass-bg);padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-lg);border:1px solid var(--glass-border)}.user-info-text{display:flex;align-items:center;gap:var(--spacing-md)}.layout-avatar{width:32px;height:32px;border-radius:50%;object-fit:cover;border:2px solid var(--color-primary)}.user-top-badge{background:#ffa50226;color:#ffa502;padding:2px 8px;border-radius:var(--radius-sm);font-size:.8em;font-weight:700;border:1px solid rgba(255,165,2,.3)}.user-level{background-color:var(--color-primary);color:#fff;padding:2px 8px;border-radius:var(--radius-sm);font-size:.8em;font-weight:700}.user-xp{color:var(--color-secondary);font-weight:700}.page-content{flex:1;overflow-y:auto;padding:var(--spacing-xl)}.user-switcher{display:flex;align-items:center;gap:10px}.user-switcher label{font-size:.9rem;color:var(--color-text-dim)}.student-select{background:var(--color-bg-card);color:#fff;border:1px solid var(--glass-border);padding:6px 12px;border-radius:var(--radius-md);outline:none;cursor:pointer;font-weight:500}.student-select:focus{border-color:var(--color-primary)}.dashboard{animation:fadeIn .5s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.welcome-banner{margin-bottom:var(--spacing-xl);padding:var(--spacing-xl);background:linear-gradient(135deg,var(--color-primary),var(--color-accent));border-radius:var(--radius-lg);color:#fff;display:flex;justify-content:space-between;align-items:center;gap:20px;box-shadow:0 10px 30px #0003}.welcome-text h2{margin:0;font-size:1.8rem}.welcome-text p{margin:10px 0 0;opacity:.9}.earned-badges-summary{background:#0003;padding:15px;border-radius:var(--radius-md);min-width:200px}.earned-badges-summary h3{font-size:.9rem;margin:0 0 10px;text-transform:uppercase;letter-spacing:1px;opacity:.8}.badges-list-mini{display:flex;flex-wrap:wrap;gap:8px}.badge-item{background:#ffffff26;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);border:1px solid rgba(255,255,255,.2);padding:5px 10px;border-radius:8px;font-size:.8rem;white-space:nowrap;animation:bounce 2s infinite ease-in-out}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-3px)}}@media(max-width:768px){.welcome-banner{flex-direction:column;text-align:center}}.dashboard-shortcuts,.mission-grid{margin-bottom:var(--spacing-xl)}.dashboard-shortcuts h3,.mission-grid h3{margin-bottom:var(--spacing-lg);font-size:1.2rem;color:var(--color-text-light)}.shortcuts-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:var(--spacing-md)}.shortcut-card{background:var(--color-bg-card);padding:var(--spacing-lg);border-radius:var(--radius-lg);border:1px solid var(--glass-border);cursor:pointer;text-align:center;transition:all .3s cubic-bezier(.4,0,.2,1);display:flex;flex-direction:column;align-items:center;gap:12px}.shortcut-card:hover{transform:translateY(-8px);border-color:var(--card-color);box-shadow:0 10px 20px #0003,0 0 15px var(--card-color)}.shortcut-icon{font-size:2.5rem;background:#ffffff0d;width:60px;height:60px;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:transform .3s}.shortcut-card:hover .shortcut-icon{transform:scale(1.1);background:var(--card-color)}.shortcut-card span{font-weight:700;font-size:.9rem;color:var(--color-text-dim)}.shortcut-card:hover span{color:#fff}.mission-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:var(--spacing-lg)}.mission-card{background:var(--color-bg-card);padding:var(--spacing-lg);border-radius:var(--radius-lg);border:1px solid var(--glass-border);transition:transform .2s}.mission-card:hover{transform:translateY(-5px);border-color:var(--color-primary)}.mission-card.active{border-color:var(--color-success)}.mission-card.locked{opacity:.5;filter:grayscale(1)}.mission-card .icon{font-size:3rem;margin-bottom:var(--spacing-md)}button{background-color:var(--color-primary);color:#fff;border:none;padding:8px 16px;border-radius:var(--radius-sm);margin-top:var(--spacing-md);font-weight:700}.dashboard-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-md)}.btn-announcements{background:var(--color-bg-card);color:var(--color-text-dim);border:1px solid var(--glass-border);margin:0;position:relative}.notification-badge{position:absolute;top:-10px;right:-10px;background-color:var(--color-danger);color:#fff;font-size:.7rem;font-weight:700;min-width:20px;height:20px;border-radius:10px;display:flex;align-items:center;justify-content:center;padding:0 6px;border:2px solid var(--color-bg-dark);box-shadow:0 0 10px #ff475780;animation:pulseRed 1.5s infinite}@keyframes pulseRed{0%{transform:scale(1);box-shadow:0 0 #ff4757b3}70%{transform:scale(1.1);box-shadow:0 0 0 10px #ff475700}to{transform:scale(1);box-shadow:0 0 #ff475700}}.btn-announcements:hover{background:var(--color-bg-hover);color:var(--color-text-light)}.modal-overlay{position:fixed;inset:0;background:#000000b3;display:flex;justify-content:center;align-items:center;z-index:1000;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);animation:fadeIn .3s ease}.modal-content{background:var(--color-bg-card);width:90%;max-width:500px;border-radius:var(--radius-lg);border:1px solid var(--glass-border);box-shadow:0 20px 50px #00000080;overflow:hidden;animation:popIn .3s cubic-bezier(.175,.885,.32,1.275)}.modal-header{background:var(--color-primary);padding:var(--spacing-md) var(--spacing-lg);display:flex;justify-content:space-between;align-items:center;color:#fff}.modal-header h3{margin:0}.close-btn{background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer;margin:0;padding:0}.modal-body{padding:var(--spacing-lg)}.announcement-list{list-style:none;padding:0}.announcement-list li{background:#ffffff0d;padding:var(--spacing-md);border-radius:var(--radius-md);margin-bottom:var(--spacing-md);border-left:3px solid var(--color-secondary)}.announcement-list .date{display:block;font-size:.8rem;color:var(--color-text-dim);margin-bottom:4px;text-transform:uppercase;font-weight:700}.announcement-list p{margin:0}.full-width{width:100%;border-radius:0;margin:0;padding:var(--spacing-md)}@keyframes popIn{0%{transform:scale(.9);opacity:0}to{transform:scale(1);opacity:1}}.profile-section{display:flex;align-items:center;gap:25px}.avatar-upload-wrapper{position:relative}.profile-avatar{width:90px;height:90px;background:#fff3;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:2.5rem;font-weight:700;border:3px solid rgba(255,255,255,.4);overflow:hidden}.profile-avatar img{width:100%;height:100%;object-fit:cover}.btn-change-pic{position:absolute;bottom:-5px;right:-5px;background:#fff;width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:1rem;box-shadow:0 4px 10px #0003;transition:transform .2s}.btn-change-pic:hover{transform:scale(1.1)}.xp-bar-mini{margin-top:15px;background:#0003;height:10px;border-radius:5px;position:relative;max-width:300px}.xp-progress{height:100%;background:#50e3c2;border-radius:5px;box-shadow:0 0 10px #50e3c280;transition:width 1s ease}.xp-text{position:absolute;right:0;top:-20px;font-size:.75rem;font-weight:700;opacity:.8}.my-activity-section{margin-bottom:var(--spacing-xl)}.activity-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--spacing-xl)}.activity-block{background:var(--color-bg-card);padding:var(--spacing-xl);border-radius:var(--radius-lg);border:1px solid var(--glass-border)}.activity-block h3{margin-bottom:var(--spacing-lg);font-size:1.1rem;color:var(--color-text-light)}.activity-list{display:flex;flex-direction:column;gap:12px}.activity-item{background:#ffffff08;padding:var(--spacing-md);border-radius:var(--radius-md);display:flex;justify-content:space-between;align-items:center;border:1px solid rgba(255,255,255,.05)}.item-info{display:flex;flex-direction:column}.item-title{font-weight:600;color:var(--color-text-light);font-size:.95rem}.item-date{font-size:.75rem;color:var(--color-text-dim)}.item-grade{font-weight:800;padding:4px 12px;border-radius:4px;font-size:.9rem}.item-grade.graded{background:#2ed5731a;color:#2ed573}.item-grade.pending{background:#ffa5021a;color:#ffa502;font-style:italic}.item-grade.assigned{background:#3498db1a;color:#3498db;font-weight:600}.empty-msg{color:var(--color-text-dim);font-style:italic;font-size:.9rem;text-align:center;padding:20px}@media(max-width:900px){.activity-grid{grid-template-columns:1fr}}.schedule-list{display:flex;flex-direction:column;gap:var(--spacing-lg);max-width:900px;margin:0 auto}.schedule-item-card{display:flex;background:var(--color-bg-card);border-radius:var(--radius-lg);border:1px solid var(--glass-border);overflow:hidden;transition:transform .3s ease;position:relative}.schedule-item-card:hover{transform:translate(10px);border-color:var(--color-primary)}.schedule-date-box{background:#ffffff0d;padding:var(--spacing-lg);display:flex;flex-direction:column;align-items:center;justify-content:center;min-width:100px;border-right:1px solid var(--glass-border)}.schedule-date-box .day{font-size:2rem;font-weight:800;color:var(--color-text-light);line-height:1}.schedule-date-box .month{text-transform:uppercase;font-size:.9rem;font-weight:700;color:var(--color-primary);margin-top:5px}.schedule-content{padding:var(--spacing-lg);flex:1}.schedule-meta{display:flex;gap:var(--spacing-md);margin-bottom:var(--spacing-sm)}.type-tag{font-size:.8rem;font-weight:700;color:var(--color-text-dim)}.time-tag{font-size:.8rem;color:var(--color-secondary);font-weight:700}.schedule-content h3{margin:10px 0;color:var(--color-text-light)}.desc{color:var(--color-text-dim);font-size:.95rem;line-height:1.5}.homework-footer{margin-top:15px;padding-top:15px;border-top:1px dashed var(--glass-border)}.hw-note{font-size:.85rem;color:#fbbf24;margin-top:10px}.status-indicator{width:6px;background:var(--color-primary)}.schedule-item-card.homework .status-indicator{background:var(--color-success)}.schedule-item-card.exam .status-indicator{background:#f87171}.empty-state{text-align:center;padding:80px 20px}.empty-icon{font-size:5rem;margin-bottom:20px}.lesson-viewer{display:flex;flex-direction:column;height:100%;max-width:800px;margin:0 auto}.lesson-header{display:flex;align-items:center;gap:var(--spacing-md);margin-bottom:var(--spacing-lg)}.back-btn{background:var(--color-bg-card);color:var(--color-text-dim);padding:4px 12px;font-size:.9em;margin:0}.homework-btn{background:var(--color-accent);color:#fff;padding:6px 16px;border-radius:var(--radius-sm);font-size:.9rem;border:none;animation:pulse 2s infinite}@keyframes pulse{0%{transform:scale(1)}50%{transform:scale(1.05)}to{transform:scale(1)}}.progress-bar-container{flex:1;height:8px;background:var(--color-bg-card);border-radius:var(--radius-sm);overflow:hidden;margin-left:var(--spacing-md)}.progress-bar{height:100%;background:var(--color-success);transition:width .3s ease}.lesson-content{flex:1;background:var(--color-bg-card);border-radius:var(--radius-lg);padding:var(--spacing-xl);border:1px solid var(--glass-border);overflow-y:auto;position:relative}.step-content{text-align:center}.step-image{max-width:100%;border-radius:var(--radius-md);margin:var(--spacing-lg) 0;box-shadow:var(--glass-shadow)}.text-content p{font-size:1.2rem;margin-bottom:var(--spacing-md)}.code-block{background:#1e1e1e;padding:var(--spacing-lg);border-radius:var(--radius-md);text-align:left;font-family:Consolas,monospace;color:#d4d4d4;overflow-x:auto;margin-top:var(--spacing-lg)}.lesson-controls{display:flex;justify-content:space-between;margin-top:var(--spacing-lg);padding-bottom:var(--spacing-lg)}.control-btn{padding:12px 24px;font-size:1.1rem;min-width:120px;margin:0}.control-btn.secondary{background:transparent;border:2px solid var(--color-bg-card);color:var(--color-text-dim)}.control-btn.secondary:disabled{opacity:.3;cursor:not-allowed}.control-btn.primary{background:var(--color-primary);box-shadow:0 4px 12px #2563eb4d}.control-btn.primary:hover{transform:translateY(-2px);box-shadow:0 6px 16px #2563eb66}.fade-in{animation:fadeIn .4s ease-out}.homework-overlay{position:fixed;inset:0;background:#000000b3;display:flex;justify-content:center;align-items:center;z-index:1000;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);animation:fadeIn .3s ease}.homework-modal{background:var(--color-bg-card);width:90%;max-width:500px;border-radius:var(--radius-lg);border:1px solid var(--color-accent);box-shadow:0 20px 50px #00000080;animation:popIn .3s cubic-bezier(.175,.885,.32,1.275);overflow:hidden}.homework-header{background:var(--color-accent);padding:var(--spacing-md) var(--spacing-lg);display:flex;justify-content:space-between;align-items:center}.homework-header h3{margin:0;color:#fff}.close-btn{background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer;padding:0}.homework-body{padding:var(--spacing-xl)}.challenge-box{background:#ffffff0d;border-radius:var(--radius-md);padding:var(--spacing-md);margin-top:var(--spacing-lg);border:1px dashed var(--color-secondary)}.challenge-box h4{color:var(--color-secondary);margin-bottom:var(--spacing-sm)}.done-btn{display:block;width:100%;padding:var(--spacing-md);background:transparent;border:none;border-top:1px solid var(--glass-border);color:var(--color-accent);font-weight:700;cursor:pointer;transition:background .2s}.done-btn:hover{background:#ffffff0d}.block-editor{display:flex;height:600px;border:1px solid var(--glass-border);border-radius:var(--radius-lg);overflow:hidden;background:var(--color-bg-card)}.sidebar-blocks{width:250px;background:#0003;padding:var(--spacing-md);border-right:1px solid var(--glass-border);overflow-y:auto}.blocks-list{display:flex;flex-direction:column;gap:var(--spacing-sm)}.block{padding:10px 16px;border-radius:4px;color:#fff;font-weight:700;cursor:pointer;-webkit-user-select:none;user-select:none;font-size:.9rem;box-shadow:0 2px #0003;transition:transform .1s}.block:hover{transform:scale(1.02)}.block:active{transform:scale(.98)}.block.event{background-color:#ffbf00}.block.motion{background-color:#4c97ff}.block.looks{background-color:#96f}.block.control{background-color:#ffab19}.workspace-area{flex:1;display:flex;flex-direction:column;padding:var(--spacing-md);background:#f0f0f0;color:#333}.workspace-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-md)}.workspace-canvas{flex:1;background:#fff;border-radius:var(--radius-md);padding:var(--spacing-lg);overflow-y:auto;min-height:200px;border:1px solid #ccc}.block.in-workspace{margin-bottom:-4px;clip-path:polygon(0% 0%,15% 0%,20% 10%,30% 10%,35% 0%,100% 0%,100% 100%,35% 100%,30% 110%,20% 110%,15% 100%,0% 100%);padding-bottom:14px}.console-area{margin-top:var(--spacing-md);background:#1e1e1e;color:#0f0;padding:var(--spacing-sm);border-radius:var(--radius-md);height:150px;font-family:Consolas,monospace;overflow-y:auto}.console-logs div{margin-bottom:4px}.placeholder{color:#aaa;text-align:center;margin-top:50px;font-style:italic}.text-editor-container{display:grid;grid-template-rows:1fr 150px;gap:15px;height:600px}.editor-main{background:#1e1e1e;border-radius:12px;display:flex;flex-direction:column;overflow:hidden;border:1px solid var(--glass-border)}.editor-header{background:#252526;padding:10px 20px;display:flex;justify-content:space-between;align-items:center;color:#9cdcfe;border-bottom:1px solid #333}.btn-run{background:#4caf50;color:#fff;border:none;padding:5px 15px;border-radius:4px;cursor:pointer;font-weight:700}.code-input{flex:1;background:transparent;color:#d4d4d4;border:none;padding:20px;font-family:Consolas,Monaco,monospace;font-size:1rem;line-height:1.5;resize:none}.code-input:focus{outline:none}.console-panel{background:#000;border-radius:12px;padding:15px;color:#4caf50;font-family:monospace;overflow-y:auto}.console-panel h4{margin:0 0 10px;color:#888;font-size:.8rem;text-transform:uppercase}.console-panel pre{margin:0;white-space:pre-wrap}.student-upload-container{background:var(--color-bg-card);padding:var(--spacing-xl);border-radius:var(--radius-lg);border:1px solid var(--glass-border);animation:slideUp .4s ease}.upload-header{text-align:center;margin-bottom:var(--spacing-xl)}.upload-header h3{font-size:1.5rem;color:var(--color-primary);margin-bottom:5px}.upload-header p{color:var(--color-text-dim)}.upload-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--spacing-lg);margin-bottom:var(--spacing-xl)}@media(max-width:768px){.upload-grid{grid-template-columns:1fr}}.upload-box{border:2px dashed var(--glass-border);border-radius:var(--radius-md);padding:var(--spacing-xl);text-align:center;transition:.3s;background:#ffffff05}.upload-box:hover{border-color:var(--color-primary);background:#ffffff0d}.upload-box.has-file{border-color:var(--color-secondary);background:#ea71000d}.upload-label{display:flex;flex-direction:column;align-items:center;gap:10px;cursor:pointer;width:100%}.upload-label input{display:none}.upload-label .icon{font-size:2.5rem}.upload-label strong{color:var(--color-text-light)}.upload-label .filename{font-size:.8rem;color:var(--color-text-dim);word-break:break-all}.upload-preview-small{margin-top:15px;max-width:100%;max-height:100px;border-radius:4px;border:1px solid var(--glass-border)}.btn-upload-submit{width:100%;padding:15px;background:var(--color-primary);color:#fff;border:none;border-radius:var(--radius-md);font-weight:700;font-size:1.1rem;cursor:pointer;transition:.3s}.btn-upload-submit:hover:not(:disabled){background:#e62e00;transform:translateY(-2px);box-shadow:0 5px 15px #ff33004d}.btn-upload-submit:disabled{opacity:.6;cursor:not-allowed}.upload-success-card{background:var(--color-bg-card);padding:50px;border-radius:var(--radius-lg);text-align:center;border:1px solid var(--glass-border)}.success-icon{font-size:4rem;margin-bottom:20px;animation:popIn .5s cubic-bezier(.175,.885,.32,1.275)}.existing-submission-card{background:var(--color-bg-card);padding:var(--spacing-xl);border-radius:var(--radius-lg);border:1px solid var(--glass-border)}.card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-lg);border-bottom:1px solid var(--glass-border);padding-bottom:var(--spacing-sm)}.grade-badge{background:var(--color-secondary);color:#fff;padding:5px 15px;border-radius:20px;font-weight:700;font-size:.9rem}.submission-preview{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:var(--spacing-lg)}@media(max-width:900px){.submission-preview{grid-template-columns:1fr}}.preview-item label{display:block;color:var(--color-primary);margin-bottom:8px;font-size:.85rem;font-weight:700}.preview-item pre{background:#1e1e1e;color:#d4d4d4;padding:15px;border-radius:8px;font-family:monospace;font-size:.85rem;max-height:200px;overflow-y:auto}.submitted-img{width:100%;border-radius:8px;border:1px solid var(--glass-border)}.card-footer{display:flex;justify-content:space-between;align-items:center;margin-top:var(--spacing-md)}.timestamp{color:var(--color-text-dim);font-size:.8rem}.form-buttons{display:flex;gap:10px}.btn-cancel-upload{padding:15px 30px;background:#555;color:#fff;border:none;border-radius:var(--radius-md);cursor:pointer}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes popIn{0%{transform:scale(0)}to{transform:scale(1)}}.coding-page{animation:fadeIn .5s ease}.coding-header-section{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-lg);border-bottom:2px solid var(--glass-border);padding-bottom:var(--spacing-md)}.week-tab-bar{display:flex;gap:12px;flex-wrap:wrap}.week-tab{background:linear-gradient(135deg,#ef44441a,#f973161a);-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);border:2px solid rgba(239,68,68,.3);color:#f87171;padding:10px 24px;border-radius:20px;cursor:pointer;font-size:.9rem;font-weight:700;transition:all .3s 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.2s}.icon-picker-trigger:hover{border-color:#3b82f6;background:#3b82f60d}.current-icon{font-size:1.5rem}.trigger-text{font-size:.85rem;color:#94a3b8;font-weight:500}.icon-picker-popover{position:absolute;top:calc(100% + 5px);left:0;width:320px;background:#1e293b;border:1px solid #334155;border-radius:12px;box-shadow:0 10px 25px #0006;padding:15px;z-index:1000;animation:fadeInScale .2s ease-out}@keyframes fadeInScale{0%{opacity:0;transform:scale(.95) translateY(-10px)}to{opacity:1;transform:scale(1) translateY(0)}}.icon-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:8px;max-height:250px;overflow-y:auto;padding-right:5px}.icon-grid::-webkit-scrollbar{width:4px}.icon-grid::-webkit-scrollbar-thumb{background:#334155;border-radius:4px}.icon-option{background:transparent;border:1px solid transparent;font-size:1.4rem;padding:5px;cursor:pointer;border-radius:6px;transition:all 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h2{margin:0;font-size:1.2rem;color:#fff}.game-frame-container{flex:1;background:#000;position:relative}.game-frame-container iframe{position:absolute;top:0;left:0;width:100%;height:100%}@media(max-width:768px){.game-modal-content{height:80vh;width:100%}}.admin-login-container{height:100vh;display:flex;justify-content:center;align-items:center;background:#f0f2f5;color:#333}.admin-login-card{background:#fff;padding:3rem;border-radius:8px;box-shadow:0 4px 12px #0000001a;text-align:center;width:100%;max-width:400px}.admin-login-card h2{color:#1a1a1a;margin-bottom:.5rem}.admin-login-card p{color:#666;margin-bottom:2rem}.admin-login-card input{width:100%;padding:12px;margin-bottom:1rem;border:1px solid #ddd;border-radius:4px;font-size:1.1rem;text-align:center;letter-spacing:4px}.admin-login-card button{width:100%;padding:12px;background:#2c3e50;color:#fff;border:none;border-radius:4px;font-size:1rem;font-weight:700;cursor:pointer;transition:background .2s}.admin-login-card button:hover{background:#34495e}.error-message{margin-top:1rem;color:#e74c3c;font-size:.9rem}.back-link{margin-top:2rem;color:#666;cursor:pointer;font-size:.9rem}.back-link:hover{text-decoration:underline}.admin-layout{display:flex;height:100vh;background:#f0f2f5;color:#333;font-family:Segoe UI,system-ui,sans-serif}.admin-sidebar{width:250px;background:#2c3e50;color:#fff;display:flex;flex-direction:column}.admin-brand{padding:20px;font-size:1.2rem;font-weight:700;border-bottom:1px solid #34495e;display:flex;align-items:center;gap:8px}.admin-badge{background:#e74c3c;font-size:.7rem;padding:2px 6px;border-radius:4px;text-transform:uppercase}.admin-nav{padding:20px 0}.admin-nav a{display:block;padding:12px 20px;color:#bdc3c7;text-decoration:none;transition:background .2s}.admin-nav a:hover{background:#34495e;color:#fff}.admin-nav a.active{background:#34495e;color:#fff;border-left:4px solid #3498db}.admin-nav .exit-link{margin-top:auto;border-top:1px solid 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.2s}.btn-delete:hover{transform:scale(1.2)}.dashboard-header-flex{display:flex;justify-content:space-between;align-items:center;margin-bottom:30px;padding-bottom:20px;border-bottom:1px solid #e0e6ed}.header-left h1{margin:0;font-size:1.8rem;color:#2c3e50}.admin-welcome{color:#7f8c8d;margin-top:5px;font-size:.95rem}.admin-profile-mini{display:flex;align-items:center;gap:12px;background:#fff;padding:8px 15px;border-radius:50px;box-shadow:0 4px 10px #0000000d}.admin-profile-mini .avatar{width:35px;height:35px;background:#3498db;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700}.admin-profile-mini .info{display:flex;flex-direction:column;line-height:1.2}.admin-profile-mini .info strong{font-size:.9rem;color:#2c3e50}.admin-profile-mini .info span{font-size:.75rem;color:#95a5a6}.quick-actions{margin-bottom:35px}.quick-actions h2{font-size:1.1rem;color:#34495e;margin-bottom:15px;text-transform:uppercase;letter-spacing:1px}.action-buttons{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:15px}.action-btn{display:flex;align-items:center;gap:15px;padding:15px 20px;border:none;border-radius:12px;color:#fff;cursor:pointer;transition:all .3s ease;font-weight:600;font-size:.95rem;box-shadow:0 4px 15px #0000001a}.action-btn .icon{font-size:1.5rem;background:#fff3;width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:10px}.action-btn:hover{transform:translateY(-5px);box-shadow:0 8px 25px #00000026}.action-btn.purple{background:linear-gradient(135deg,#a855f7,#7c3aed)}.action-btn.blue{background:linear-gradient(135deg,#3b82f6,#2563eb)}.action-btn.orange{background:linear-gradient(135deg,#f97316,#ea580c)}.action-btn.green{background:linear-gradient(135deg,#10b981,#059669)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-bottom:35px}.stat-card{background:#fff;padding:24px;border-radius:15px;box-shadow:0 5px 20px #0000000d;border:1px solid #f1f5f9}.stat-header{display:flex;align-items:center;gap:12px;margin-bottom:15px}.stat-icon{width:35px;height:35px;display:flex;align-items:center;justify-content:center;border-radius:8px;font-size:1.2rem}.stat-icon.blue{background:#3b82f61a;color:#3b82f6}.stat-icon.yellow{background:#f59e0b1a;color:#f59e0b}.stat-icon.green{background:#10b9811a;color:#10b981}.stat-icon.red{background:#ef44441a;color:#ef4444}.stat-card.critical{border:1px solid 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16px;border-radius:6px;cursor:pointer;font-weight:700;transition:.2s}.btn-view-alert:hover{background:#e84118;transform:scale(1.05)}.stat-value.highlight{color:#ff4757}.mini-task-form{display:flex;gap:8px;margin-bottom:15px}.mini-task-form input{flex:1;padding:10px;border:1px solid #ddd;border-radius:6px;font-size:.9rem}.mini-task-form button{background:#2ed573;color:#fff;border:none;padding:0 15px;border-radius:6px;cursor:pointer;font-size:1.2rem}.task-list li{background:#f8f9fa;margin-bottom:8px;padding:10px 15px;border-radius:6px;justify-content:space-between!important;transition:.2s}.task-list li:hover{background:#f1f2f6}.task-list li.completed span{text-decoration:line-through;color:#bdc3c7}.task-content{display:flex;align-items:center;gap:12px}.btn-tiny-del{background:none;border:none;color:#ff4757;font-size:1.4rem;cursor:pointer;line-height:1;padding:0 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#f0f0f0;color:#2c3e50}.student-name{display:flex;align-items:center;gap:12px;font-weight:500}.avatar{width:32px;height:32px;background:#3498db;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700}.status-badge{padding:4px 8px;border-radius:12px;font-size:.8rem;font-weight:500}.status-badge.online{background:#27ae601a;color:#27ae60}.status-badge.offline{background:#95a5a61a;color:#95a5a6}.btn-action{background:none;border:1px solid #ddd;padding:5px 10px;border-radius:4px;color:#666;cursor:pointer;font-size:.9rem}.btn-action:hover{border-color:#3498db;color:#3498db}.admin-student-detail{animation:fadeIn .4s ease}.detail-header{display:flex;align-items:center;gap:20px;margin-bottom:30px}.btn-back{background:#f0f0f0;border:none;padding:8px 15px;border-radius:6px;cursor:pointer;font-weight:500}.submission-card{background:#fff;padding:25px;border-radius:12px;box-shadow:0 4px 15px #0000000d;margin-bottom:25px;border:1px solid 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th{background:#f8f9fa;text-align:left;padding:15px;color:#7f8c8d;font-size:.85rem;text-transform:uppercase;letter-spacing:1px}.admin-table td{padding:15px;border-bottom:1px solid #f0f0f0;vertical-align:middle}.week-col{font-weight:700;color:#e67e22;white-space:nowrap}.table-img{width:60px;height:45px;object-fit:cover;border-radius:4px;border:1px solid #eee}.title-col{font-weight:500;color:#2c3e50}.desc-col{max-width:250px}.text-truncate{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:#7f8c8d;font-size:.9rem}.btn-delete{background:#fee2e2;color:#dc2626;border:1px solid #fecaca;padding:6px 12px;border-radius:4px;cursor:pointer;font-size:.85rem;transition:.2s}.btn-delete:hover{background:#dc2626;color:#fff}.image-uploads-row{display:flex;gap:1.5rem;margin-bottom:1.5rem}.image-uploads-row .form-group{flex:1}.form-actions{display:flex;gap:1rem;margin-top:10px}.form-actions .btn-add{flex:2;margin-top:0}.btn-cancel{flex:1;background:#f1f5f9;color:#64748b;border:1px solid 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