@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;700&display=swap";:root{--primary:#4c9aff;--primary-dark:#2684ff;--primary-light:#b3d4ff;--secondary:#00b8d9;--secondary-dark:#008da6;--accent:#ff5630;--accent-green:#36b37e;--accent-yellow:#ffab00;--accent-orange:#ff7452;--bg-0:#101214;--bg-1:#161a1d;--bg-2:#1d2125;--bg-3:#22272b;--bg-4:#2c333a;--surface:#22272b;--surface-hover:#2c333a;--glass:#1d2125;--glass-border:#454f59;--glass-border-hover:#4c9aff;--text-primary:#dcdfe4;--text-secondary:#b3b9c4;--text-muted:#8c93a2;--text-accent:#4c9aff;--border:#2c333a;--border-accent:#4c9aff;--success:#22a06b;--success-bg:#22a06b1a;--warning:#f5cd47;--warning-bg:#f5cd471a;--danger:#e5493a;--danger-bg:#e5493a1a;--info:#4c9aff;--info-bg:#4c9aff1a;--radius-sm:8px;--radius:12px;--radius-lg:16px;--radius-xl:24px;--radius-full:9999px;--shadow-sm:0 2px 8px #0000000d;--shadow:0 10px 30px #00000014;--shadow-lg:0 20px 40px #0000001f;--shadow-glow:0 0 20px #4c9aff66;--shadow-glow-cyan:0 0 20px #00b8d966;--transition:all .2s cubic-bezier(.2, .8, .2, 1);--transition-slow:all .4s cubic-bezier(.2, .8, .2, 1);--transition-bounce:all .3s cubic-bezier(.34, 1.56, .64, 1);--font:"Inter", -apple-system, BlinkMacSystemFont, sans-serif;--font-mono:"JetBrains Mono", "Fira Code", monospace;--sidebar-width:240px;--sidebar-collapsed-width:60px;--topbar-height:56px}[data-theme=light]{--primary:#0052cc;--primary-dark:#0047b3;--primary-light:#0052cc;--secondary:#0065ff;--secondary-dark:#0747a6;--accent:#de350b;--accent-green:#00875a;--accent-yellow:#b45309;--accent-orange:#c2410c;--bg-0:#f8fafc;--bg-1:#f1f5f9;--bg-2:#fff;--bg-3:#e2e8f0;--bg-4:#cbd5e1;--surface:#fff;--surface-hover:#f8fafc;--glass:#fff;--glass-border:#e2e8f0;--glass-border-hover:#0052cc;--text-primary:#0f172a;--text-secondary:#334155;--text-muted:#64748b;--text-accent:#0052cc;--border:#e2e8f0;--border-accent:#0052cc;--success:#00875a;--success-bg:#e3fcef;--warning:#ff991f;--warning-bg:#fff0b3;--danger:#de350b;--danger-bg:#ffebe6;--info:#0052cc;--info-bg:#deebff;--shadow-sm:0 4px 12px #091e420d;--shadow:0 12px 32px #091e4214;--shadow-lg:0 24px 48px #091e421f;--shadow-glow:0 0 24px #0052cc26;--shadow-glow-cyan:0 0 24px #0065ff26}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font);background:var(--bg-0);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh;line-height:1.6}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg-1)}::-webkit-scrollbar-thumb{background:var(--bg-4);border-radius:99px}::-webkit-scrollbar-thumb:hover{background:var(--primary)}a{color:inherit;text-decoration:none}img{max-width:100%}button{cursor:pointer;font-family:var(--font)}input,textarea,select{font-family:var(--font)}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2}h1{font-size:clamp(2rem,5vw,3.5rem)}h2{font-size:clamp(1.5rem,3vw,2.5rem)}h3{font-size:clamp(1.25rem,2.5vw,1.75rem)}h4{font-size:1.25rem}h5{font-size:1.125rem}.text-gradient{color:var(--primary)}.text-gradient-warm{color:var(--accent-orange)}.app-layout{min-height:100vh;display:flex}.main-content{margin-left:var(--sidebar-width);flex:1;min-height:100vh;transition:margin-left .35s cubic-bezier(.4,0,.2,1)}.sidebar-collapsed .main-content{margin-left:var(--sidebar-collapsed-width)}.page-container{max-width:1400px;margin:0 auto;padding:32px}.sidebar-hamburger{z-index:150;border:1px solid var(--border);background:var(--bg-2);width:42px;height:42px;color:var(--text-primary);cursor:pointer;-webkit-backdrop-filter:blur(12px);opacity:1;border-radius:12px;justify-content:center;align-items:center;transition:all .3s cubic-bezier(.4,0,.2,1);display:none;position:fixed;top:16px;left:16px;transform:scale(1);box-shadow:0 4px 16px #00000026}.sidebar-hamburger:hover{background:var(--primary);color:#fff;transform:scale(1.05);box-shadow:0 4px 20px #6c63ff66}.hamburger-hidden{opacity:0;pointer-events:none;transform:scale(.8)}.sidebar-overlay{display:none}@media (width<=768px){.main-content{margin-left:0!important}.page-container{padding:60px 16px 16px}.sidebar-hamburger{display:flex;top:10px;left:10px}.hamburger-hidden{opacity:0;pointer-events:none;transform:scale(.8)}.sidebar-overlay{-webkit-backdrop-filter:blur(4px);z-index:99;background:#0000008c;display:block;position:fixed;inset:0}}.glass-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);transition:var(--transition);padding:24px}.glass-card:hover{box-shadow:var(--shadow-sm)}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);transition:var(--transition)}.card:hover{box-shadow:var(--shadow-sm)}.btn{border-radius:var(--radius);cursor:pointer;transition:var(--transition-bounce);white-space:nowrap;border:none;align-items:center;gap:8px;padding:10px 20px;font-size:.9rem;font-weight:600;text-decoration:none;display:inline-flex}.btn:active{transform:scale(.97)}.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--shadow-sm)}.btn-primary:hover{background:var(--primary-dark);box-shadow:var(--shadow);transform:translateY(-1px)}.btn-secondary{border:1px solid var(--border-accent);color:var(--text-primary);background:0 0}.btn-secondary:hover{background:var(--surface-hover);color:var(--text-accent)}[data-theme=light] .btn-secondary{color:#334155;background:#fff;border:1px solid #cbd5e1;box-shadow:0 1px 2px #0000000a}[data-theme=light] .btn-secondary:hover{color:#0f172a;background:#f1f5f9;border-color:#94a3b8}.btn-gradient{background:linear-gradient(135deg, var(--primary), var(--secondary));color:#fff;box-shadow:var(--shadow-glow);border:none;transition:all .3s}.btn-gradient:hover{background:linear-gradient(135deg, var(--primary-dark), var(--secondary-dark));box-shadow:var(--shadow-lg);transform:translateY(-2px)}.btn-danger{background:var(--danger-bg);color:var(--danger);border:1px solid #ef44444d}.btn-danger:hover{background:var(--danger);color:#fff}.btn-success{background:var(--success);color:#fff;box-shadow:var(--shadow-sm)}.btn-sm{border-radius:var(--radius-sm);padding:7px 14px;font-size:.8rem}.btn-lg{border-radius:var(--radius-lg);padding:14px 28px;font-size:1rem}.btn-icon{aspect-ratio:1;justify-content:center;padding:8px}.badge{border-radius:var(--radius-sm);letter-spacing:.05em;text-transform:uppercase;align-items:center;gap:4px;padding:3px 8px;font-size:.7rem;font-weight:600;display:inline-flex}.badge-primary{color:var(--primary);background:#4c9aff1a;border:1px solid #4c9aff4d}.badge-success{background:var(--success-bg);color:var(--success);border:1px solid #22a06b4d}.badge-warning{background:var(--warning-bg);color:var(--warning);border:1px solid #f5cd474d}.badge-danger{background:var(--danger-bg);color:var(--danger);border:1px solid #e5493a4d}.badge-info{background:var(--info-bg);color:var(--info);border:1px solid #4c9aff4d}.badge-cyan{color:var(--secondary);background:#00b8d91a;border:1px solid #00b8d94d}.form-group{flex-direction:column;gap:8px;display:flex}.form-label{color:var(--text-secondary);font-size:.875rem;font-weight:600}.form-input,.input-field{background:var(--bg-3);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);transition:var(--transition);outline:none;width:100%;padding:11px 15px;font-size:.9rem}.form-input:focus,.input-field:focus{border-color:var(--primary);box-shadow:0 0 0 3px #6366f138}.form-input::placeholder,.input-field::placeholder{color:var(--text-muted)}.form-select,select.input-field,select{background-color:var(--bg-3);border:1.5px solid var(--border);color:var(--text-primary);appearance:none;cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg 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#6366f126;border-top-color:var(--primary);border-radius:50%;width:40px;height:40px;animation:.8s cubic-bezier(.5,.1,.4,.9) infinite spinnerRotate}@keyframes spinnerRotate{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.progress-bar-container{background:var(--bg-3);border-radius:0;width:100%;height:4px;overflow:hidden}.progress-bar-fill{background:var(--primary);border-radius:0;height:100%;transition:width .3s}@keyframes shimmer{0%{left:-100%}to{left:100%}}.sidebar{width:var(--sidebar-width);background:var(--bg-1);border-right:1px solid var(--border);z-index:100;flex-direction:column;height:100vh;transition:width .35s cubic-bezier(.4,0,.2,1),transform .35s cubic-bezier(.4,0,.2,1);display:flex;position:fixed;top:0;left:0;overflow:hidden}@media (width>=769px){.sidebar-closed{width:var(--sidebar-collapsed-width)}.sidebar-closed .sidebar-label-text{opacity:0;white-space:nowrap;width:0;transition:opacity .2s,width .2s;overflow:hidden;flex:0 0 0!important;margin:0!important;padding:0!important}.sidebar-open .sidebar-label-text{opacity:1;transition:opacity .25s .1s}.sidebar-closed .sidebar-study-streak{opacity:0;height:0;margin:0;padding:0;transition:all .2s;overflow:hidden}.sidebar-closed .sidebar-user{justify-content:center}.sidebar-closed .sidebar-user .user-avatar{margin:0 auto}.sidebar-closed .sidebar-section-title{text-align:center;padding:12px 4px 4px}.sidebar-closed .nav-item{justify-content:center;width:44px;height:44px;margin:0 auto;padding:0}.sidebar-closed .sidebar-logo{justify-content:center;padding:16px 0}.sidebar-closed .sidebar-actions{justify-content:center;width:100%;margin:0;padding:0}.sidebar-closed .sidebar-logo-container,.sidebar-closed .theme-toggle-btn,.sidebar-closed .sidebar-logout-btn{display:none!important}.sidebar-closed .sidebar-logo-icon{width:36px;height:36px;font-size:1rem}.sidebar-closed .sidebar-collapse-btn{display:flex}}@media (width<=768px){.sidebar{width:280px;box-shadow:none;transform:translate(-100%)}.sidebar.sidebar-open{transform:translate(0);box-shadow:8px 0 30px #0000004d}.sidebar.sidebar-closed{width:280px;transform:translate(-100%)}.sidebar-collapse-btn{display:none}}.sidebar-collapse-btn{border:1px solid var(--border);width:32px;height:32px;color:var(--text-muted);cursor:pointer;background:0 0;border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;transition:all .2s;display:flex}.sidebar-collapse-btn:hover{background:var(--surface-hover);color:var(--text-primary)}.sidebar-logo{border-bottom:1px solid var(--border);align-items:center;gap:12px;padding:12px 16px 8px;transition:padding .35s;display:flex}.sidebar-logo-icon{background:var(--primary);border-radius:var(--radius);color:#fff;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-size:1rem;transition:all .3s;display:flex}.sidebar-logo-text{white-space:nowrap;text-overflow:ellipsis;font-size:.9rem;font-weight:800;overflow:hidden}.sidebar-logo-sub{color:var(--text-muted);white-space:nowrap;text-overflow:ellipsis;font-size:.65rem;font-weight:400;overflow:hidden}.sidebar-study-streak{background:var(--surface-hover);border:1px solid var(--border);border-radius:var(--radius);align-items:center;gap:8px;margin:8px 12px 0;padding:6px 10px;transition:all .3s;display:flex}.sidebar-nav{scrollbar-width:none;-ms-overflow-style:none;flex-direction:column;flex:1;gap:1px;padding:6px 10px;display:flex;overflow-y:auto}.sidebar-nav::-webkit-scrollbar{display:none}.sidebar-section-title{letter-spacing:.1em;color:var(--text-muted);text-transform:uppercase;padding:8px 8px 2px;font-size:.55rem;font-weight:700;transition:all .3s}.nav-item{border-radius:var(--radius-sm);color:var(--text-secondary);transition:var(--transition);cursor:pointer;text-align:left;background:0 0;border:none;align-items:center;gap:8px;width:100%;padding:5px 10px;font-size:.8rem;font-weight:500;text-decoration:none;display:flex}.nav-item .sidebar-label-text{flex:1}.nav-item:hover{background:var(--surface-hover);color:var(--text-primary)}.nav-item.active{background:var(--info-bg);color:var(--primary);font-weight:600}.nav-item.active .nav-icon{color:var(--primary)}.nav-icon{flex-shrink:0}.sidebar-user{border-top:1px solid var(--border);align-items:center;gap:8px;padding:10px 12px;transition:all .3s;display:flex}.user-avatar{object-fit:cover;border:2px solid var(--primary);border-radius:50%;flex-shrink:0;width:32px;height:32px}.user-info-name{font-size:.8rem;font-weight:600}.user-info-email{color:var(--text-muted);font-size:.65rem}.topbar{height:var(--topbar-height);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);z-index:50;background:#0a0e1acc;justify-content:space-between;align-items:center;padding:0 32px;display:flex;position:sticky;top:0}.topbar-title{font-size:1.1rem;font-weight:700}.topbar-right{align-items:center;gap:12px;display:flex}.cert-card{background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius-xl);cursor:pointer;transition:var(--transition-bounce);padding:28px;position:relative;overflow:hidden}.cert-card:before{content:"";background:var(--cert-gradient,linear-gradient(90deg, var(--primary), var(--secondary)));height:3px;position:absolute;top:0;left:0;right:0}.cert-card:hover{border-color:var(--border-accent);box-shadow:var(--shadow-glow);transform:translateY(-4px)}.cert-card-icon{border-radius:var(--radius-lg);justify-content:center;align-items:center;width:56px;height:56px;margin-bottom:16px;font-size:1.75rem;display:flex;position:relative}.cert-card-header{justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:12px;display:flex}.cert-card-title{font-size:1.05rem;font-weight:700;line-height:1.3}.cert-card-code{color:var(--text-muted);margin-top:4px;font-size:.75rem}.cert-card-desc{color:var(--text-secondary);margin-bottom:20px;font-size:.85rem;line-height:1.6}.cert-card-meta{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.exam-container{height:calc(100vh - var(--topbar-height) - 64px);grid-template-columns:1fr 300px;align-items:start;gap:24px;display:grid}.exam-main{background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius-xl);padding:32px}.exam-question-num{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:16px;font-size:.8rem;font-weight:600}.exam-question-text{word-break:break-word;overflow-wrap:break-word;margin-bottom:32px;font-size:1.1rem;font-weight:500;line-height:1.6}.exam-options{flex-direction:column;gap:12px;display:flex}.exam-option{background:var(--bg-3);border:1px solid var(--border);border-radius:var(--radius-lg);cursor:pointer;transition:var(--transition);text-align:left;width:100%;color:var(--text-primary);word-break:break-word;overflow-wrap:break-word;align-items:flex-start;gap:14px;padding:16px 20px;font-size:.9rem;line-height:1.6;display:flex}.exam-option:hover:not(:disabled){border-color:var(--primary);background:#6c63ff0d}.exam-option.selected{border-color:var(--primary);background:#6c63ff1a}.exam-option.correct{border-color:var(--success);background:var(--success-bg)}.exam-option.incorrect{border-color:var(--danger);background:var(--danger-bg)}.exam-option:disabled{cursor:default}.option-letter{border:2px solid var(--border);width:28px;height:28px;transition:var(--transition);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:.8rem;font-weight:700;display:flex}.exam-option.selected .option-letter{background:var(--primary);border-color:var(--primary);color:#fff}.exam-option.correct .option-letter{background:var(--success);border-color:var(--success);color:#fff}.exam-option.incorrect .option-letter{background:var(--danger);border-color:var(--danger);color:#fff}.exam-sidebar-panel{top:calc(var(--topbar-height) + 32px);flex-direction:column;gap:16px;display:flex;position:sticky}.exam-timer{background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius-lg);text-align:center;padding:20px}.timer-display{font-size:2.5rem;font-weight:800;font-family:var(--font-mono);background:linear-gradient(135deg, var(--primary), var(--secondary));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.timer-label{color:var(--text-muted);margin-top:4px;font-size:.75rem}.timer-warning{color:var(--warning)}.timer-danger{color:var(--danger)}.question-grid{background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px}.question-grid-title{color:var(--text-muted);margin-bottom:12px;font-size:.8rem;font-weight:600}.question-dots{grid-template-columns:repeat(7,1fr);gap:6px;display:grid}.question-dot{aspect-ratio:1;background:var(--bg-3);cursor:pointer;transition:var(--transition-bounce);color:var(--text-muted);border:none;border-radius:6px;justify-content:center;align-items:center;font-size:.65rem;font-weight:700;display:flex}.question-dot:hover{background:var(--surface-hover);color:var(--text-primary);transform:scale(1.1)}.question-dot.current{background:var(--primary);color:#fff}.question-dot.answered{color:var(--primary-light);background:#6c63ff33;border:1px solid #6c63ff4d}.question-dot.flagged{color:var(--warning);background:#f59e0b33;border:1px solid #f59e0b4d}.question-dot.flagged.answered{background:#f59e0b4d}.flashcard-scene{perspective:1200px;cursor:pointer;width:100%;max-width:100%;height:280px;margin:0}.flashcard-card{width:100%;height:100%;transform-style:preserve-3d;transition:transform .6s cubic-bezier(.4,0,.2,1);position:relative}.flashcard-card.flipped{transform:rotateY(180deg)}.flashcard-face{backface-visibility:hidden;border-radius:var(--radius-xl);text-align:center;flex-direction:column;justify-content:center;align-items:center;width:100%;height:100%;padding:40px;display:flex;position:absolute;overflow-y:auto}.flashcard-front{background:var(--bg-2);border:1px solid var(--border)}.flashcard-back{background:linear-gradient(135deg,#6c63ff26,#00d4ff14);border:1px solid #6c63ff4d;transform:rotateY(180deg)}.flashcard-face-label{letter-spacing:.1em;text-transform:uppercase;color:var(--text-muted);margin-bottom:16px;font-size:.7rem;font-weight:700}.flashcard-face-term{font-size:1.5rem;font-weight:700;line-height:1.3}.flashcard-face-definition{color:var(--text-secondary);font-size:.95rem;line-height:1.7}.domain-item{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:12px 0;display:flex}.domain-item:last-child{border-bottom:none}.domain-name{font-size:.9rem;font-weight:500}.domain-pct{color:var(--text-muted);font-size:.85rem;font-weight:600;font-family:var(--font-mono)}.stat-card{background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius-lg);transition:var(--transition);padding:24px}.stat-card:hover{border-color:var(--border-accent);transform:translateY(-2px)}.stat-value{font-size:2rem;font-weight:800;font-family:var(--font-mono);margin-bottom:4px;line-height:1}.stat-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-size:.8rem;font-weight:600}.stat-trend{margin-top:8px;font-size:.75rem}.stat-trend.up{color:var(--success)}.stat-trend.down{color:var(--danger)}.glossary-item{border-bottom:1px solid var(--border);padding:22px 24px;transition:all .2s}.glossary-item:last-child{border-bottom:none}.glossary-item:hover{background:var(--surface-hover)}[data-theme=light] .glossary-item:hover{background:#f8fafc}.glossary-term{color:var(--primary);letter-spacing:-.01em;transition:var(--transition);margin-bottom:6px;font-size:1.1rem;font-weight:700}[data-theme=light] .glossary-term{color:#0052cc;font-weight:800}.glossary-item:hover 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