@import"https://fonts.googleapis.com/css2?family=Nunito:wght@400;500;600;700;800;900&family=Quicksand:wght@500;600;700&display=swap&subset=vietnamese";:root{--color-primary: #4f46e5;--color-primary-hover: #4338ca;--color-primary-light: #eef2ff;--color-secondary: #0ea5e9;--color-secondary-hover: #0284c7;--color-secondary-light: #f0f9ff;--color-success: #10b981;--color-success-hover: #059669;--color-success-light: #ecfdf5;--color-warning: #f59e0b;--color-warning-hover: #d97706;--color-warning-light: #fffbeb;--color-accent: #ef4444;--color-accent-hover: #dc2626;--color-accent-light: #fef2f2;--color-orange: #ea580c;--color-info: #3b82f6;--gradient-primary: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);--gradient-secondary: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);--gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);--gradient-warning: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);--gradient-accent: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);--gradient-orange: linear-gradient(135deg, #ea580c 0%, #c2410c 100%);--gradient-info: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);--gradient-mesh: radial-gradient(circle at 10% 20%, rgba(79, 70, 229, .06) 0%, transparent 50%), radial-gradient(circle at 90% 80%, rgba(14, 165, 233, .06) 0%, transparent 50%);--bg-page: #f8fafc;--bg-surface: #ffffff;--border-color: #e2e8f0;--border-color-light: #f1f5f9;--color-text-primary: #0f172a;--color-text-secondary: #334155;--color-text-muted: #64748b;--color-text-subtle: #94a3b8;--shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, .04);--shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, .06), 0 1px 2px 0 rgba(0, 0, 0, .04);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .07), 0 2px 4px -2px rgba(0, 0, 0, .05);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .08), 0 4px 6px -4px rgba(0, 0, 0, .03);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .08), 0 8px 10px -6px rgba(0, 0, 0, .03);--radius-xs: 8px;--radius-sm: 12px;--radius-md: 16px;--radius-lg: 22px;--radius-full: 9999px;--font-family-primary: "Nunito", "Quicksand", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--transition-fast: .15s ease;--transition-normal: .25s ease}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent;font-family:inherit}button,input,select,textarea{font-family:inherit}body{font-family:var(--font-family-primary);background-color:var(--bg-page);color:var(--color-text-secondary);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh;position:relative;overflow-x:hidden}h1,h2,h3,h4,h5,h6{color:var(--color-text-primary);font-weight:800;line-height:1.25;letter-spacing:-.025em}a{color:var(--color-primary);text-decoration:none;font-weight:600;transition:color var(--transition-fast)}a:hover{color:var(--color-primary-hover)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.65rem 1.4rem;font-family:var(--font-family-primary);font-weight:600;font-size:.95rem;border:1px solid transparent;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition-fast);text-align:center;-webkit-user-select:none;user-select:none;outline:none;box-shadow:var(--shadow-xs)}.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn:active{transform:translateY(0);box-shadow:var(--shadow-xs)}.btn-primary{background-color:var(--color-primary);color:#fff;border-color:var(--color-primary)}.btn-primary:hover{background-color:var(--color-primary-hover);border-color:var(--color-primary-hover)}.btn-secondary{background-color:var(--color-secondary);color:#fff;border-color:var(--color-secondary)}.btn-secondary:hover{background-color:var(--color-secondary-hover);border-color:var(--color-secondary-hover)}.btn-danger{background-color:var(--color-accent);color:#fff;border-color:var(--color-accent)}.btn-danger:hover{background-color:var(--color-accent-hover);border-color:var(--color-accent-hover)}.btn-light{background-color:#f1f5f9;color:var(--color-text-secondary);border-color:var(--border-color)}.btn-light:hover{background-color:#e2e8f0;color:var(--color-text-primary)}.btn-ghost{background-color:transparent;color:var(--color-text-muted);border-color:transparent;box-shadow:none}.btn-ghost:hover{background-color:#f1f5f9;color:var(--color-text-primary);box-shadow:none}.btn-sm{padding:.4rem .9rem;font-size:.85rem;border-radius:var(--radius-xs)}.btn-icon{width:38px;height:38px;padding:0;background:#fff;border:2px solid #e2e8f0;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s cubic-bezier(.175,.885,.32,1.275);color:#64748b;box-shadow:0 4px 10px #00000008;flex-shrink:0}.btn-icon:hover{background:var(--color-background-light);border-color:var(--color-primary);color:var(--color-primary);transform:translateY(-2px);box-shadow:0 6px 15px #864cbf1a}.btn-icon-secondary:hover{border-color:var(--color-secondary);color:var(--color-secondary);background-color:#f0fdf4}.btn-icon-danger{color:var(--color-accent)}.btn-icon-danger:hover{border-color:var(--color-accent);color:var(--color-accent);background-color:#fef2f2}.btn-icon svg{width:20px;height:20px;stroke:currentColor}.card{background:var(--bg-surface);border-radius:var(--radius-md);border:1px solid var(--border-color);box-shadow:var(--shadow-sm);padding:1.75rem;transition:all var(--transition-normal);position:relative;display:flex;flex-direction:column;color:var(--color-text-secondary)}.card:hover{border-color:#cbd5e1;box-shadow:var(--shadow-md)}.card label,.card .form-label{color:var(--color-text-muted);font-weight:700;font-size:.82rem;letter-spacing:.02em;margin-bottom:.5rem;display:block}.card h1,.card h2,.card h3,.card h4,.card-title{color:var(--color-text-primary);font-weight:800;letter-spacing:-.02em;margin-bottom:1.2rem}.card-soft{background:var(--bg-surface);border-radius:var(--radius-sm);padding:1.25rem;border:1px solid var(--border-color);box-shadow:var(--shadow-xs);transition:all var(--transition-normal)}.card-soft:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.pill-badge{display:inline-flex;align-items:center;gap:.4rem;padding:4px 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#00a06a26}.card-info{background:linear-gradient(135deg,#fff,#e0f2fe);border-color:#e0f2fe;box-shadow:var(--shadow-3d-info)}.card-info:hover{border-color:var(--color-info);box-shadow:0 12px 0 var(--color-info-dark),0 15px 30px #1368ce26}.card-warning{background:linear-gradient(135deg,#fff,#fffbeb);border-color:#fffbeb;box-shadow:var(--shadow-3d-warning)}.card-warning:hover{border-color:var(--color-warning);box-shadow:0 12px 0 var(--color-warning-dark),0 15px 30px #ffa60226}.card-accent{background:linear-gradient(135deg,#fff,#fff1f2);border-color:#fff1f2;box-shadow:var(--shadow-3d-accent)}.card-accent:hover{border-color:var(--color-accent);box-shadow:0 12px 0 var(--color-accent-dark),0 15px 25px #b8163026}.card-orange{background:linear-gradient(135deg,#fff,#fff7ed);border-color:#fff7ed;box-shadow:var(--shadow-3d-orange)}.card-orange:hover{border-color:var(--color-orange);box-shadow:0 12px 0 var(--color-orange-dark),0 15px 25px #d4450026}.glass-panel{background:linear-gradient(135deg,#fffffff2,#ffffffd9);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.4);border-radius:var(--radius-lg);box-shadow:var(--shadow-soft-md)}.container{width:100%;max-width:1100px;margin:0 auto;padding:0 2rem}.flex-center{display:flex;align-items:center;justify-content:center}.flex-between{display:flex;align-items:center;justify-content:space-between}.flex-column{display:flex;flex-direction:column}.avatar-circle{width:50px;height:50px;border-radius:50%;background:#f1f3f5;display:flex;align-items:center;justify-content:center;font-weight:800;color:var(--color-primary);border:3px solid white;box-shadow:var(--shadow-soft-sm)}.icon-circle{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.badge{padding:.25rem .75rem;border-radius:100px;font-size:.75rem;font-weight:800;text-transform:uppercase;letter-spacing:.5px}.badge-success{background:#00a06a1a;color:var(--color-secondary)}.badge-primary{background:#864cbf1a;color:var(--color-primary)}@keyframes popIn{0%{opacity:0;transform:scale(.95) translateY(10px)}to{opacity:1;transform:scale(1) translateY(0)}}.animate-pop{animation:popIn var(--transition-bounce) forwards}@keyframes slideUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@keyframes pulseConnection{0%{stroke-opacity:.6;stroke-width:4}50%{stroke-opacity:1;stroke-width:6}to{stroke-opacity:.6;stroke-width:4}}@keyframes pulse{0%{transform:scale(1)}50%{transform:scale(1.1)}to{transform:scale(1)}}.animate-pulse{animation:pulseConnection 2s infinite ease-in-out}.animate-slide-up{animation:slideUp var(--transition-normal) 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h3{font-size:1.5rem;margin-bottom:1.5rem}.floating-contact-container{position:fixed;bottom:2rem;right:2rem;left:auto!important;display:flex;flex-direction:column;gap:1.2rem;z-index:9999}.contact-btn{width:60px;height:60px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;cursor:pointer;box-shadow:0 10px 25px #0003;transition:all .3s cubic-bezier(.175,.885,.32,1.275);position:relative;border:4px solid white}.contact-btn:hover{transform:scale(1.1) translateY(-5px)}.contact-btn:before{content:"";position:absolute;inset:-8px;border-radius:50%;background:inherit;opacity:.3;z-index:-1;animation:contactPulse 2s infinite}@keyframes contactPulse{0%{transform:scale(1);opacity:.5}to{transform:scale(1.5);opacity:0}}.zalo-btn{background:#0068ff}.ai-btn{background:linear-gradient(135deg,#6366f1,#a855f7)}.call-btn{background:#00bcd4}.ai-dot{position:absolute;top:10px;right:10px;width:14px;height:14px;background:#f59e0b;border:2px solid 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#f1f5f9}.dashboard-header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1.5rem}.header-actions{display:flex;gap:1rem;align-items:center;flex-wrap:wrap}.search-container{position:relative;width:220px}.search-icon{position:absolute;left:1rem;top:50%;transform:translateY(-50%);color:#94a3b8}.filter-select{padding:.6rem 1rem;border-radius:12px;border:2px solid #f1f5f9;font-size:.9rem;font-weight:600;background-color:#fff;cursor:pointer;width:auto;outline:none}.header-btn{padding:.7rem 1.2rem!important;font-size:.95rem!important;min-width:fit-content}@media(max-width:1024px){.dashboard-header{flex-direction:column;align-items:flex-start;gap:1rem}.header-actions{width:100%;justify-content:flex-start}}@media(max-width:768px){.header-actions{display:grid;grid-template-columns:1fr 1fr;width:100%;gap:.8rem}.search-container,.filter-select{grid-column:span 2;width:100%}.header-btn{width:100%;padding:.8rem 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auto}@media(max-width:768px){.quiz-options-grid{grid-template-columns:1fr;gap:1rem}}.game-btn-option{position:relative;padding:1.5rem;font-size:1.4rem;font-weight:900;color:#fff;border:none;border-radius:24px;cursor:pointer;transition:all .1s cubic-bezier(.175,.885,.32,1.275);display:flex;align-items:center;justify-content:center;text-align:center;min-height:100px;-webkit-user-select:none;user-select:none;width:100%;transform:translateY(0)}.game-btn-option:active{transform:translateY(4px);box-shadow:none!important}.game-btn-option:disabled{opacity:.7;cursor:not-allowed;transform:none}@media(max-width:600px){.game-btn-option{padding:1rem;font-size:1.1rem;min-height:80px;border-radius:18px}}.btn-gamified-3d{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:.6rem;padding:.8rem 2rem;font-size:.95rem;font-weight:800;text-transform:uppercase;color:#fff;background:var(--gradient-primary);border:1px solid rgba(255,255,255,.1);border-radius:16px;box-shadow:0 4px 15px #6a3a9d33;cursor:pointer;transform:translateY(0);transition:all .3s cubic-bezier(.175,.885,.32,1.275);-webkit-user-select:none;user-select:none;text-decoration:none}.btn-gamified-3d:hover{transform:translateY(-2px);box-shadow:0 8px 20px #6a3a9d4d}.btn-gamified-3d:active{transform:translateY(1px);box-shadow:0 2px 10px #6a3a9d26}.btn-gamified-3d-secondary{background:var(--gradient-secondary);box-shadow:0 4px 15px #00a06a33}.btn-gamified-3d-secondary:hover{box-shadow:0 8px 20px #00a06a4d}.btn-gamified-3d-secondary:active{box-shadow:0 2px 10px #00a06a26}.btn-gamified-3d-orange{background:var(--gradient-orange);box-shadow:0 4px 15px #f35b0433}.btn-gamified-3d-orange:hover{box-shadow:0 8px 20px #f35b044d}.btn-gamified-3d-orange:active{box-shadow:0 2px 10px #f35b0426}.btn-gamified-3d-info{background:var(--gradient-info);box-shadow:0 4px 15px #1368ce33}.btn-gamified-3d-info:hover{box-shadow:0 8px 20px #1368ce4d}.btn-gamified-3d-info:active{box-shadow:0 2px 10px #1368ce26}.btn-gamified-3d-accent{background:var(--gradient-accent);box-shadow:0 4px 15px #e21b3c33}.btn-gamified-3d-accent:hover{box-shadow:0 8px 20px #e21b3c4d}.btn-gamified-3d-accent:active{box-shadow:0 2px 10px #e21b3c26}.btn-gamified-3d-white{background:#fff!important;background-image:none!important;color:var(--color-primary)!important;border:2px solid #e2e8f0;box-shadow:0 4px 10px #0000000a}.btn-gamified-3d-white:hover{background:#f8fafc!important;border-color:var(--color-primary);box-shadow:0 6px 15px #864cbf14}.btn-gamified-3d-white:active{box-shadow:0 2px 5px #00000005}.btn-gamified-3d:disabled{opacity:.5;cursor:not-allowed;transform:none!important;box-shadow:none!important}.card-gamified{background:var(--glass-bg);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--glass-border);border-radius:24px;padding:1.8rem;box-shadow:var(--glass-shadow);transition:all .3s cubic-bezier(.175,.885,.32,1.275);position:relative;overflow:hidden}.card-gamified.hover-up:hover{transform:translateY(-5px);background:var(--glass-bg-accent);box-shadow:0 12px 30px #0000001f}.pin-console-gamified{background:var(--gradient-primary);border:1px solid rgba(255,255,255,.15);border-radius:28px;padding:2.5rem;box-shadow:0 15px 35px #6a3a9d40;color:#fff;text-align:center;position:relative;overflow:hidden}.pin-console-gamified:before{content:"";position:absolute;top:0;left:0;width:100%;height:6px;background:#ffffff26}.input-gamified{width:100%;padding:1rem 1.5rem;font-size:1.2rem;font-weight:800;text-align:center;border:2px solid #e2e8f0;border-radius:18px;background-color:#f8fafc;color:#1a1a1a;outline:none;transition:all .3s ease}.input-gamified:focus{border-color:var(--color-primary);background-color:#fff;box-shadow:0 0 0 4px #864cbf26}.tabs-gamified-container{display:flex;background:#ffffff73;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.6);border-radius:20px;padding:5px;gap:6px;box-shadow:0 4px 15px #00000008}.tab-gamified{flex:1;padding:.8rem 1.2rem;font-size:.9rem;font-weight:800;color:#64748b;border:none;background:transparent;border-radius:15px;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center;gap:.6rem;text-transform:uppercase}.tab-gamified.active{color:var(--color-primary);background:#fff;box-shadow:0 4px 12px #0000000d;transform:translateY(0)}.option-box-gamified{display:flex;align-items:center;width:100%;padding:1.2rem 1.5rem;font-size:1.1rem;font-weight:800;color:#334155;background:#fff;border:2px solid #e2e8f0;border-radius:18px;box-shadow:0 4px 10px #00000008;cursor:pointer;transition:all .2s ease;-webkit-user-select:none;user-select:none;text-align:left}.option-box-gamified:hover{transform:translateY(-2px);border-color:var(--color-primary);box-shadow:0 6px 15px #864cbf14}.option-box-gamified:active,.option-box-gamified.selected{transform:translateY(0)}.option-box-gamified.selected{border-color:var(--color-primary);background-color:#f3f0ff;color:var(--color-primary);box-shadow:0 4px 12px #864cbf26}.badge-gamified{display:inline-flex;align-items:center;gap:.4rem;padding:.4rem 1rem;font-size:.85rem;font-weight:900;text-transform:uppercase;border-radius:12px;color:#fff;border:2px solid rgba(255,255,255,.2)}.badge-gamified.success{background-color:#2ed573}.badge-gamified.warning{background-color:#ffa502}.badge-gamified.danger{background-color:#ff4757}.badge-gamified.info{background-color:#1e90ff}.badge-gamified.primary{background-color:#6c5ce7}@keyframes bounce-gamified{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.animate-bounce-gamified{animation:bounce-gamified 2s infinite ease-in-out}@keyframes pulse-light{0%{transform:scale(1);box-shadow:0 0 #6c5ce766}70%{transform:scale(1.02);box-shadow:0 0 0 10px #6c5ce700}to{transform:scale(1);box-shadow:0 0 #6c5ce700}}.animate-pulse-active{animation:pulse-light 2s infinite}.badge-congrats-3d{width:140px;height:140px;background:linear-gradient(135deg,gold,orange);border:4px solid white;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 2rem;box-shadow:0 10px 25px #ffa50040;animation:bounce-gamified 3s infinite ease-in-out}@media(max-width:768px){.interactive-board-wrapper{flex-direction:column!important;gap:1.5rem!important}.interactive-board-sidebar{width:100%!important;position:static!important}}@media(max-width:860px){.class-mgmt-layout{flex-direction:column!important;gap:1.25rem!important}.class-mgmt-sidebar{width:100%!important;position:static!important}}