:root{--color-primary:#8e24aa;--color-primary-light:#c158dc;--color-primary-dark:#5c007a;--color-secondary:#00b4d8;--color-secondary-light:#48cae4;--color-secondary-dark:#0077b6;--color-white:#fff;--color-black:#0b090a;--color-success:#10b981;--color-danger:#ef4444;--color-warning:#f59e0b;--color-info:#3b82f6;--color-bg:#f8f9fa;--color-bg-elevated:#fff;--color-text:#212529;--color-text-muted:#6c757d;--color-border:#dee2e6;--color-border-glow:#8e24aa33;--color-nav-active-bg:#8e24aa1a;--color-nav-active-text:var(--color-primary-dark);--shadow-sm:0 2px 4px #0000000d;--shadow-md:0 4px 12px #00000014;--shadow-lg:0 12px 24px #0000001f;--shadow-glow:0 0 15px var(--color-border-glow);--radius-sm:6px;--radius-md:12px;--radius-lg:20px;--radius-full:9999px;--font-family:"Inter", system-ui, -apple-system, sans-serif;--transition-fast:.2s cubic-bezier(.4, 0, .2, 1);--transition-normal:.3s cubic-bezier(.4, 0, .2, 1)}@media (prefers-color-scheme:dark){:root{--color-bg:#0f1115;--color-bg-elevated:#1a1d24;--color-text:#f8f9fa;--color-text-muted:#a0aab5;--color-border:#2a2e37;--color-border-glow:#8e24aa66;--color-nav-active-bg:#8e24aa33;--color-nav-active-text:var(--color-primary-light);--shadow-sm:0 2px 4px #0003;--shadow-md:0 4px 12px #0000004d;--shadow-lg:0 12px 24px #0006}}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--color-bg);color:var(--color-text);-webkit-font-smoothing:antialiased;transition:background-color var(--transition-normal), color var(--transition-normal);line-height:1.5}a{color:var(--color-primary);transition:color var(--transition-fast);text-decoration:none}a:hover{color:var(--color-primary-light);text-decoration:underline}@keyframes fadeInUp{0%{opacity:0;transform:translateY(15px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:.5s cubic-bezier(.16,1,.3,1) forwards fadeInUp}@keyframes slideUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}.modal-overlay{z-index:9999;background-color:#0009;justify-content:center;align-items:center;padding:1rem;display:flex;position:fixed;inset:0}.modal-content{background:var(--color-bg);border-radius:var(--radius-lg);width:100%;max-width:450px;box-shadow:var(--shadow-lg);max-height:90vh;padding:2rem;overflow-y:auto}.conflict-modal{border:1px solid #8a2be266!important;box-shadow:0 0 20px #8a2be24d!important}.glass{-webkit-backdrop-filter:blur(16px);box-shadow:var(--shadow-sm);border-radius:var(--radius-lg);background:#fff9;border:1px solid #ffffff4d}@media (prefers-color-scheme:dark){.glass{box-shadow:var(--shadow-sm);background:#1a1d2499;border:1px solid #ffffff14}}.container{max-width:1200px;margin:0 auto;padding:0 20px}.btn{border-radius:var(--radius-md);cursor:pointer;transition:transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);border:none;justify-content:center;align-items:center;padding:.6rem 1.2rem;font-weight:500;display:inline-flex;position:relative;overflow:hidden}.btn:active{transform:translateY(1px)scale(.98)}.btn-primary{background:linear-gradient(135deg, var(--color-primary), var(--color-primary-light));color:var(--color-white);box-shadow:0 2px 6px #8e24aa33}.btn-primary:hover{filter:brightness(1.05);transform:translateY(-2px);box-shadow:0 4px 12px #8e24aa4d}.btn-secondary{background:linear-gradient(135deg, var(--color-secondary), var(--color-secondary-light));color:var(--color-white);box-shadow:0 2px 6px #00b4d833}.btn-secondary:hover{filter:brightness(1.05);transform:translateY(-2px);box-shadow:0 4px 12px #00b4d84d}.card{background-color:var(--color-bg-elevated);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);border:1px solid var(--color-border);transition:transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);padding:1.5rem}.card:hover{box-shadow:var(--shadow-lg), var(--shadow-glow);border-color:var(--color-border-glow);transform:translateY(-4px)}.layout{height:100vh;display:flex;overflow:hidden}.sidebar{border-right:1px solid var(--color-border);background-color:var(--color-bg-elevated);width:260px;transition:width var(--transition-normal), padding var(--transition-normal);z-index:10;flex-direction:column;padding:2rem 1.25rem;display:flex}.sidebar.collapsed{width:88px;padding:2rem .75rem}.main-content{scroll-behavior:smooth;flex:1;min-width:0;padding:2rem;animation:.4s cubic-bezier(.16,1,.3,1) fadeInUp;overflow-y:auto}.hero-banner{background:linear-gradient(135deg, var(--color-primary), var(--color-secondary-dark));border-radius:var(--radius-lg);color:var(--color-white);box-shadow:var(--shadow-lg);flex-direction:column;justify-content:center;margin-bottom:2rem;padding:3rem 2rem;display:flex;position:relative;overflow:hidden}.hero-banner:after{content:"";pointer-events:none;background:radial-gradient(circle at 100% 0,#ffffff26,#0000 60%);position:absolute;inset:0}.notification-center{max-height:400px;padding-right:.5rem;overflow-y:auto}.notification-center::-webkit-scrollbar{width:6px}.notification-center::-webkit-scrollbar-track{background:0 0}.notification-center::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:var(--radius-full)}.timeline{flex-direction:column;gap:1.5rem;margin-top:1rem;display:flex}.timeline-item{position:relative}.timeline-item .class-card-hover{border-left:6px solid var(--color-primary)!important}.timeline-item.past .class-card-hover{border-left:6px solid var(--color-border)!important}.timeline-item.enrolled .class-card-hover{border-left:6px solid #00796b!important}.timeline-item.global .class-card-hover{border-left:6px solid #1565c0!important}.schedule-header{justify-content:space-between;align-items:flex-start;gap:1rem;margin-bottom:.5rem;display:flex}.schedule-details{color:var(--color-text-muted);flex-wrap:wrap;gap:2rem;font-size:.9rem;display:flex}.featured-event{grid-column:1/-1;border:2px solid var(--color-primary-light)!important;padding:2rem!important}@media (width>=1024px){.dashboard-grid{grid-template-columns:1.2fr 1fr;align-items:start;gap:2rem;display:grid}}@media (width<=768px){.layout{flex-direction:column}.sidebar{border-right:none;border-bottom:1px solid var(--color-border);z-index:50;height:auto;position:sticky;top:0;width:100%!important;padding:.75rem 1rem!important}.sidebar-nav.mobile-hidden{display:none!important}.sidebar.mobile-open{height:100vh;position:fixed;overflow-y:auto}.main-content{padding:1rem}.hero-banner{margin-bottom:0!important;padding:1.5rem 1rem!important}.hero-banner h1{font-size:1.75rem!important}.hero-banner p{margin-bottom:1rem!important;font-size:1rem!important}.main-content>div{gap:1rem!important}.dashboard-grid{flex-direction:column;gap:1rem;display:flex}.featured-event{padding:1.25rem!important}.schedule-header{flex-direction:column;gap:.75rem!important}.schedule-details{flex-direction:column;gap:.25rem!important}.timeline{margin-left:0;padding-left:0}.card{padding:1rem}.class-card-hover:active,.event-card-hover:active,.btn:active{transition:transform .1s;box-shadow:var(--shadow-sm)!important;transform:scale(.98)!important}.modal-overlay{align-items:flex-start;padding:0}.modal-content{border-radius:0;width:100%;max-width:100%;min-height:100dvh;margin:0;padding:1.5rem;animation:.3s cubic-bezier(.16,1,.3,1) slideUp}}.tiptap-container{border:1px solid var(--color-border);border-radius:var(--radius-md);background-color:var(--color-bg-elevated);flex-direction:column;display:flex;overflow:hidden}.tiptap-toolbar{border-bottom:1px solid var(--color-border);background-color:var(--color-bg);-webkit-overflow-scrolling:touch;flex-wrap:nowrap;align-items:center;gap:4px;padding:8px;display:flex;overflow-x:auto}.tiptap-toolbar::-webkit-scrollbar{height:4px}.tiptap-toolbar::-webkit-scrollbar-thumb{background-color:var(--color-border);border-radius:var(--radius-full)}.tiptap-btn{border-radius:var(--radius-sm);width:32px;height:32px;color:var(--color-text-muted);cursor:pointer;transition:all var(--transition-fast);background:0 0;border:none;justify-content:center;align-items:center;display:flex}.tiptap-btn:hover:not(:disabled){background-color:var(--color-border);color:var(--color-text)}.tiptap-btn.is-active{background-color:var(--color-primary-light);color:var(--color-white)}.tiptap-btn:disabled{opacity:.5;cursor:not-allowed}.tiptap-divider{background-color:var(--color-border);width:1px;height:24px;margin:0 4px}.tiptap-editor{flex-grow:1}.tiptap-editor .tiptap,.tiptap-readonly .tiptap{min-height:150px;color:var(--color-text);outline:none;padding:16px;line-height:1.6}.tiptap-editor .tiptap p.is-editor-empty:first-child:before{color:var(--color-text-muted);content:attr(data-placeholder);float:left;pointer-events:none;opacity:.7;height:0}.tiptap-editor .tiptap ul,.tiptap-readonly .tiptap ul,.tiptap-editor .tiptap ol,.tiptap-readonly .tiptap ol{margin:12px 0;padding-left:24px}.tiptap-editor .tiptap a,.tiptap-readonly .tiptap a{color:var(--color-primary);cursor:pointer;text-decoration:underline}.instructor-notes{border-top:1px solid var(--color-border);margin-top:1.5rem;padding-top:1rem}.notes-header{border-bottom:1px solid var(--color-border);justify-content:space-between;align-items:center;margin-bottom:1.5rem;padding-bottom:1rem;display:flex}.notes-title{text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-muted);align-items:center;gap:.5rem;margin:0;font-size:.85rem;display:flex}.notes-text{color:var(--color-text-muted);font-size:.95rem}.text-primary{color:var(--color-primary)}.notes-actions{gap:8px;display:flex}.notes-cancel{background:var(--color-bg);border:1px solid var(--color-border);color:var(--color-text)}.notes-cancel:hover{background:var(--color-border)}.mt-3{margin-top:1rem}.mt-4{margin-top:1.5rem}.mb-2{margin-bottom:.5rem}.notes-content{color:var(--color-text);line-height:1.6}.notes-content a{color:var(--color-primary);text-decoration:underline}.notes-content ul,.notes-content ol{margin:10px 0;padding-left:20px}.notes-empty{color:var(--color-text-muted);font-style:italic}.line-clamp-3{-webkit-line-clamp:3;-webkit-box-orient:vertical;display:-webkit-box;overflow:hidden}.line-clamp-4{-webkit-line-clamp:4;-webkit-box-orient:vertical;display:-webkit-box;overflow:hidden}.attachments-title{color:var(--color-text);margin-top:1.5rem;margin-bottom:.75rem;font-size:1rem}.attachments-grid{flex-direction:column;gap:8px;display:flex}.attachment-chip{background-color:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-md);color:var(--color-text);transition:all var(--transition-fast);align-items:center;gap:12px;padding:10px 14px;display:flex;text-decoration:none!important}.attachment-chip:not(.edit-mode):hover{border-color:var(--color-primary);background-color:var(--color-nav-active-bg)}.attachment-name{word-break:break-all;flex-grow:1;font-weight:500}.attachment-download{color:var(--color-text-muted)}.attachment-chip:hover .attachment-download{color:var(--color-primary)}.btn-icon{cursor:pointer;background:0 0;border:none;border-radius:4px;justify-content:center;align-items:center;padding:4px;display:flex}.btn-icon:hover{background-color:#ef44441a}.text-danger{color:var(--color-danger)}.form-group label{color:var(--color-text);margin-bottom:.5rem;font-weight:600;display:block}.upload-zone{margin-top:.5rem}.hidden-input{display:none}.upload-btn{background-color:var(--color-bg);border:1px dashed var(--color-border);border-radius:var(--radius-md);color:var(--color-text-muted);cursor:pointer;transition:all var(--transition-fast);align-items:center;gap:8px;padding:8px 16px;display:inline-flex}.upload-btn:hover{border-color:var(--color-primary);color:var(--color-primary);background-color:var(--color-nav-active-bg)}.checkbox-label{align-items:center;gap:8px;display:flex;font-weight:400!important}.text-muted{color:var(--color-text-muted)}