@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@400;500;600;700;800&display=swap";:root{--primary:#f59e0b;--primary-hover:#d97706;--primary-light:#fbbf24;--primary-dark:#b45309;--primary-bg:#f59e0b1f;--primary-border:#f59e0b59;--primary-glow:#f59e0b33;--accent-amber:#f59e0b;--accent-gold:#d97706;--accent-bronze:#b45309;--bg-app:#0b0b0b;--bg-sidebar:#101010;--bg-topbar:#101010e6;--bg-card:#171717;--bg-card-hover:#202020;--bg-surface:#171717;--bg-surface-elevated:#202020;--bg-input:#171717;--bg-modal:#171717;--font-main:"Inter", -apple-system, BlinkMacSystemFont, sans-serif;--font-heading:"Outfit", "Inter", sans-serif;--text-heading:#fafaf9;--text-primary:#fafaf9;--text-secondary:#a8a29e;--text-muted:#a8a29e;--text-dim:#78716c;--text-inverse:#0b0b0b;--success:#22c55e;--success-bg:#22c55e1f;--success-border:#22c55e4d;--error:#ef4444;--error-bg:#ef44441f;--error-border:#ef44444d;--warning:#f59e0b;--warning-bg:#f59e0b1f;--warning-border:#f59e0b4d;--info:#3b82f6;--info-bg:#3b82f61f;--info-border:#3b82f64d;--border-subtle:#2a2a2a;--border-medium:#2a2a2a;--border-active:#f59e0b;--radius-xs:4px;--radius-sm:6px;--radius-md:10px;--radius-lg:14px;--radius-xl:18px;--radius-full:9999px;--shadow-sm:0 1px 2px #0009;--shadow-md:0 4px 12px #000000b3;--shadow-lg:0 10px 25px #000000d9;--shadow-glow:0 0 20px #f59e0b26;--sidebar-width:260px;--sidebar-collapsed-width:72px;--topbar-height:64px}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body{background-color:var(--bg-app);width:100%;min-height:100vh;color:var(--text-primary);font-family:var(--font-main);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-size:14px;line-height:1.5}#root{flex-direction:column;min-height:100vh;display:flex}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);color:var(--text-heading);font-weight:600;line-height:1.25}h1{letter-spacing:-.02em;font-size:1.75rem}h2{letter-spacing:-.01em;font-size:1.35rem}h3{font-size:1.15rem}h4{font-size:1rem}a{color:var(--primary);text-decoration:none;transition:color .15s}a:hover{color:var(--primary-hover)}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg-app)}::-webkit-scrollbar-thumb{background:#2a2a2a;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#3a3a3a}.btn{font-family:var(--font-main);border-radius:var(--radius-md);cursor:pointer;white-space:nowrap;-webkit-user-select:none;user-select:none;background:0 0;border:1px solid #0000;justify-content:center;align-items:center;gap:8px;padding:8px 16px;font-size:.875rem;font-weight:500;transition:all .18s cubic-bezier(.4,0,.2,1);display:inline-flex}.btn:disabled{opacity:.5;cursor:not-allowed;pointer-events:none}.btn-primary{color:#0b0b0b;background:linear-gradient(#f59e0b 0%,#d97706 100%);border:1px solid #f59e0b40;font-weight:600;box-shadow:0 2px 6px #00000059}.btn-primary:hover{color:#0b0b0b;background:linear-gradient(#d97706 0%,#b45309 100%);transform:translateY(-1px);box-shadow:0 4px 12px #00000073}.btn-primary:active{background:#b45309}.btn-secondary{color:#fafaf9;background:#171717;border:1px solid #2a2a2a}.btn-secondary:hover{color:#fafaf9;background:#202020;border-color:#2a2a2a;transform:translateY(-1px)}.btn-outline{color:var(--primary);border:1px solid var(--primary-border);background:0 0}.btn-outline:hover{background:var(--primary-bg);border-color:var(--primary)}.btn-danger{color:#ef4444;background:#ef444426;border:1px solid #ef44444d}.btn-danger:hover{color:#fafaf9;background:#ef4444;border-color:#ef4444}.btn-ghost{color:var(--text-secondary);background:0 0}.btn-ghost:hover{color:var(--text-heading);background:#ffffff0d}.btn-icon{border-radius:var(--radius-sm);color:var(--text-secondary);border:1px solid #0000;padding:8px}.btn-icon:hover{color:var(--text-heading);background:#ffffff14}.btn-sm{border-radius:var(--radius-sm);padding:5px 10px;font-size:.775rem}.btn-lg{border-radius:var(--radius-lg);padding:12px 24px;font-size:1rem}.form-group{flex-direction:column;gap:6px;margin-bottom:16px;display:flex}.form-label{color:var(--text-secondary);align-items:center;gap:4px;font-size:.8rem;font-weight:500;display:flex}.form-label .required{color:var(--error)}.input,.select,.textarea{width:100%;font-family:var(--font-main);border-radius:var(--radius-md);border:1px solid var(--border-medium);background:var(--bg-input);color:var(--text-heading);outline:none;padding:9px 13px;font-size:.875rem;transition:all .18s}.input::placeholder,.textarea::placeholder{color:var(--text-dim)}.input:focus,.select:focus,.textarea:focus{border-color:var(--primary);background:var(--bg-card);box-shadow:0 0 0 3px #f59e0b26}.select option{background:var(--bg-modal);color:var(--text-heading)}.textarea{resize:vertical;min-height:85px}.input-icon-wrapper{align-items:center;display:flex;position:relative}.input-icon-wrapper .input-icon-left{color:var(--text-muted);pointer-events:none;position:absolute;left:12px}.input-icon-wrapper .input{padding-left:38px}.input-error{border-color:var(--error)!important}.error-text{color:#ef4444;margin-top:4px;font-size:.75rem}.toggle-switch{cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:10px;display:inline-flex}.toggle-switch input{display:none}.toggle-slider{background-color:#ffffff1f;border-radius:22px;width:40px;height:22px;transition:background-color .2s;position:relative}.toggle-slider:before{content:"";background-color:#fff;border-radius:50%;width:18px;height:18px;transition:transform .2s cubic-bezier(.4,0,.2,1);position:absolute;top:2px;left:2px}.toggle-switch input:checked+.toggle-slider{background-color:var(--primary)}.toggle-switch input:checked+.toggle-slider:before{transform:translate(18px)}.badge{border-radius:var(--radius-full);letter-spacing:.02em;text-transform:capitalize;align-items:center;gap:5px;padding:3px 9px;font-size:.725rem;font-weight:600;display:inline-flex}.badge-dot{border-radius:50%;width:6px;height:6px}.badge-success{background:var(--success-bg);color:#22c55e;border:1px solid var(--success-border)}.badge-success .badge-dot{background:#22c55e}.badge-warning{background:var(--warning-bg);color:#f59e0b;border:1px solid var(--warning-border)}.badge-warning .badge-dot{background:#f59e0b}.badge-error{background:var(--error-bg);color:#ef4444;border:1px solid var(--error-border)}.badge-error .badge-dot{background:#ef4444}.badge-info{background:var(--info-bg);color:#60a5fa;border:1px solid var(--info-border)}.badge-info .badge-dot{background:#60a5fa}.badge-primary{background:var(--primary-bg);color:var(--primary);border:1px solid var(--primary-border)}.badge-primary .badge-dot{background:var(--primary)}.badge-neutral{color:var(--text-secondary);border:1px solid var(--border-subtle);background:#ffffff0f}.badge-neutral .badge-dot{background:var(--text-muted)}.table-container{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);width:100%;box-shadow:var(--shadow-sm);overflow-x:auto}.data-table{border-collapse:collapse;text-align:left;width:100%}.data-table th{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em;border-bottom:1px solid var(--border-medium);white-space:nowrap;background:#ffffff05;padding:12px 16px;font-size:.75rem;font-weight:600}.data-table td{border-bottom:1px solid var(--border-subtle);color:var(--text-primary);vertical-align:middle;padding:14px 16px;font-size:.85rem}.data-table tbody tr{transition:background-color .15s}.data-table tbody tr:hover{background-color:var(--bg-card-hover)}.data-table tbody tr:last-child td{border-bottom:none}.pagination-bar{border-top:1px solid var(--border-subtle);color:var(--text-secondary);background:#ffffff03;justify-content:space-between;align-items:center;padding:14px 18px;font-size:.8rem;display:flex}.pagination-controls{align-items:center;gap:6px;display:flex}.page-btn{border-radius:var(--radius-sm);background:var(--bg-surface);border:1px solid var(--border-subtle);color:var(--text-secondary);cursor:pointer;padding:6px 10px;font-size:.8rem;transition:all .15s}.page-btn:hover:not(:disabled){background:var(--bg-surface-elevated);color:var(--text-heading);border-color:var(--border-medium)}.page-btn.active{background:var(--primary);color:var(--text-inverse);border-color:var(--primary);font-weight:600}.page-btn:disabled{opacity:.4;cursor:not-allowed}.card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:20px;transition:border-color .2s,box-shadow .2s}.card:hover{border-color:var(--border-medium)}.stat-card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:20px;transition:all .2s;position:relative;overflow:hidden}.stat-card:hover{border-color:var(--primary-border);box-shadow:var(--shadow-glow);transform:translateY(-2px)}.stat-card:before{content:"";background:linear-gradient(90deg, transparent, var(--primary), transparent);opacity:0;height:2px;transition:opacity .2s;position:absolute;top:0;left:0;right:0}.stat-card:hover:before{opacity:1}.stat-header{justify-content:space-between;align-items:center;margin-bottom:12px;display:flex}.stat-title{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.04em;font-size:.8rem;font-weight:500}.stat-icon{border-radius:var(--radius-md);background:var(--primary-bg);width:38px;height:38px;color:var(--primary);justify-content:center;align-items:center;display:flex}.stat-value{font-size:1.85rem;font-family:var(--font-heading);color:var(--text-heading);margin-bottom:6px;font-weight:700;line-height:1.1}.stat-subtitle{color:var(--text-muted);align-items:center;gap:4px;font-size:.775rem;display:flex}.modal-overlay{-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);z-index:1000;background:#000000bf;justify-content:center;align-items:center;padding:20px;animation:.2s ease-out fadeIn;display:flex;position:fixed;inset:0}.modal-content{background:var(--bg-modal);border:1px solid 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var(--border-medium);width:100%;max-width:580px;height:100%;box-shadow:var(--shadow-lg);flex-direction:column;animation:.25s cubic-bezier(.16,1,.3,1) slideInRight;display:flex}.drawer-header{border-bottom:1px solid var(--border-subtle);justify-content:space-between;align-items:center;padding:20px 24px;display:flex}.drawer-body{flex:1;padding:24px;overflow-y:auto}.drawer-footer{border-top:1px solid var(--border-subtle);justify-content:flex-end;gap:10px;padding:16px 24px;display:flex}.toast-container{z-index:9999;pointer-events:none;flex-direction:column;gap:10px;display:flex;position:fixed;bottom:24px;right:24px}.toast{pointer-events:auto;border-radius:var(--radius-lg);background:var(--bg-modal);border:1px solid var(--border-medium);min-width:320px;max-width:440px;box-shadow:var(--shadow-lg);align-items:flex-start;gap:12px;padding:14px 16px;animation:.25s ease-out 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var(--border-subtle);width:56px;height:56px;color:var(--text-muted);background:#ffffff0a;border-radius:50%;justify-content:center;align-items:center;margin-bottom:16px;display:flex}.empty-state-title{color:var(--text-heading);margin-bottom:6px;font-size:1.1rem}.empty-state-description{color:var(--text-secondary);max-width:360px;margin-bottom:20px;font-size:.85rem}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes scaleUp{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}@keyframes slideInRight{0%{transform:translate(100%)}to{transform:translate(0)}}@keyframes toastSlideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}@media (width<=768px){:root{--sidebar-width:100%}}.admin-layout{background-color:var(--bg-app);min-height:100vh;display:flex}.admin-sidebar{width:var(--sidebar-width);background-color:var(--bg-sidebar);border-right:1px solid 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var(--border-subtle);justify-content:space-between;align-items:center;padding:12px 18px 12px 32px;transition:background-color .15s;display:flex}.lesson-item:hover{background-color:#202020}.lesson-item:last-child{border-bottom:none}.lesson-left{align-items:center;gap:12px;display:flex}.lesson-title{color:var(--text-primary);font-size:.875rem}.lesson-meta{color:var(--text-muted);align-items:center;gap:8px;font-size:.75rem;display:flex}.mobile-sidebar-overlay{display:none}@media (width<=900px){.admin-sidebar{transform:translate(-100%)}.admin-sidebar.mobile-open{box-shadow:var(--shadow-lg);transform:translate(0)}.mobile-sidebar-overlay.active{z-index:99;background:#0009;display:block;position:fixed;inset:0}.admin-main{margin-left:0}}