:root{--bg: #07111f;--panel: #0d1a2d;--panel-2: #111f35;--border: #243653;--border-soft: #1b2b45;--text: #f8fafc;--muted: #9fb4d1;--primary: #3b82f6;--primary-hover: #2563eb;--danger: #e5485d;--danger-hover: #c7364a;--success: #22c55e;--radius: 12px;--radius-sm: 8px;--shadow-card: 0 12px 24px rgba(2, 10, 24, .35);font-family:Inter,ui-sans-serif,system-ui,Arial,sans-serif;color:var(--text);background:var(--bg)}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at top left,#0e1a2e 0%,var(--bg) 52%)}h1,h2,h3,h4,h5,p{margin:0}button{cursor:pointer}input,select,textarea{-webkit-appearance:none;-moz-appearance:none;appearance:none;background:var(--panel-2);color:var(--text);border:1px solid var(--border);border-radius:var(--radius-sm);padding:10px 12px;width:100%;min-height:40px;transition:border-color .15s ease,box-shadow .15s ease,background .15s ease}input:focus,select:focus,textarea:focus{outline:none;border-color:#3d5f96;box-shadow:0 0 0 2px #3b82f638}textarea{resize:vertical}.auth-wrap{min-height:100vh;display:grid;place-items:center;padding:20px;background:radial-gradient(circle at 10% 10%,#10203b 0%,var(--bg) 55%)}.login-layout{display:grid;gap:100px;justify-items:center;transform:translateY(-32px)}.login-title{font-size:clamp(36px,5vw,56px);font-weight:800;letter-spacing:.3px;color:var(--text);text-align:center}.login-card{width:min(380px,94vw);padding:32px;gap:14px}.login-subtitle{margin-top:-4px;margin-bottom:6px}.spinner{width:44px;height:44px;border-radius:50%;border:3px solid rgba(159,180,209,.25);border-top-color:var(--primary);animation:spinner-rotate .8s linear infinite}@keyframes spinner-rotate{to{transform:rotate(360deg)}}.admin-shell{min-height:100vh;display:grid;grid-template-columns:250px 1fr}.admin-sidebar{position:sticky;top:0;height:100vh;padding:24px 16px;border-right:1px solid var(--border);background:#07111ff2;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;flex-direction:column;gap:16px}.brand{font-size:22px;font-weight:700;color:var(--text);padding:10px}.nav-list{display:grid;gap:8px}.nav-item{border:1px solid var(--border-soft);background:transparent;color:var(--muted);text-align:left;padding:11px 12px;border-radius:var(--radius-sm);min-height:42px}.nav-item:hover{background:#131f35;color:#fff;border-color:#30476d}.nav-item.active{border-color:#335892;background:#173564;color:#eaf1ff}.logout-btn{margin-top:auto}.admin-main{padding:20px;display:flex;flex-direction:column;gap:14px;align-items:stretch}.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:16px;display:flex;flex-direction:column;gap:12px;box-shadow:var(--shadow-card)}.page-header{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}.page-header h1{font-size:28px}.page-header p{color:var(--muted);margin-top:5px}.stats-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.stat-card{min-height:124px;justify-content:space-between}.stat-card strong{font-size:34px;line-height:1;margin:2px 0}.btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:1px solid transparent;border-radius:var(--radius-sm);padding:10px 14px;min-height:40px;background:var(--primary);color:#fff;font-weight:600;transition:background .15s ease,border-color .15s ease,transform .05s ease}.btn:hover{background:var(--primary-hover)}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.6;cursor:not-allowed;transform:none}.btn-ghost{background:#152136;border-color:#2c3b53}.btn-ghost:hover{background:#1b2a45}.btn-danger{background:var(--danger)}.btn-danger:hover{background:var(--danger-hover)}.btn-small{padding:7px 10px;font-size:12px;border-radius:8px}.btn-block{width:100%}.form-grid{display:grid;grid-template-columns:repeat(3,minmax(180px,1fr));gap:10px 12px;align-items:end}.field{display:grid;gap:6px}.field span{color:var(--muted);font-size:12px;font-weight:600}.field.actions{display:flex;gap:8px;align-items:flex-end}.table-card{overflow:auto;padding:0}.table-scroll{overflow:auto;padding:8px 12px 0}.pro-table{width:100%;border-collapse:separate;border-spacing:0;min-width:900px}.pro-table th,.pro-table td{text-align:left;padding:12px;border-bottom:1px solid var(--border-soft);vertical-align:middle;white-space:nowrap}.pro-table tbody tr{height:68px}.pro-table th{color:var(--muted);font-size:12px;font-weight:700;background:#12223a;position:sticky;top:0;z-index:1}.pro-table tbody tr:hover{background:#14233c}.table-actions{display:flex;gap:8px;align-items:center}.table-actions .btn{min-height:35px;height:35px;padding:0 12px;border-radius:7px;font-size:11px;font-weight:700;letter-spacing:.2px;line-height:1;white-space:nowrap;text-align:center;display:inline-flex;align-items:center;justify-content:center}.actions-cell{width:160px;min-width:160px;max-width:170px;white-space:nowrap;vertical-align:middle}.actions-cell .table-actions{flex-wrap:nowrap}.table-actions .btn-ghost{background:#15253d;border-color:#355179;color:#d9e7ff}.table-actions .btn-ghost:hover{background:#1b2f4d;border-color:#4770a9}.table-actions .btn-danger{background:#dc4a60;border-color:#e86879;color:#fff}.table-actions .btn-danger:hover{background:#c93a4f;border-color:#d85a6c}.badge{display:inline-block;font-size:11px;padding:2px 8px;border-radius:999px;border:1px solid #355483;background:#162a47;color:#cfe0fc}.muted{color:var(--muted);font-size:12px}.error{color:#ff9dae}.empty-state{border:1px dashed #2f4568;border-radius:var(--radius);padding:24px;text-align:center;color:var(--muted);margin:16px}.filter-grid{display:grid;grid-template-columns:2fr repeat(4,minmax(130px,1fr));gap:10px}.thumb{width:64px;height:42px;border-radius:var(--radius-sm);object-fit:cover;border:1px solid #2c3d58}.pagination{display:flex;justify-content:space-between;align-items:center;gap:12px;padding-top:8px}.exercises-pagination{padding:12px;border-top:1px solid var(--border-soft);background:#0f1c31}.pagination-controls{display:flex;align-items:center;gap:6px}.pagination-controls select{width:76px}.pagination-ellipsis{display:inline-flex;align-items:center;justify-content:center;min-width:24px;color:var(--muted);font-size:13px;-webkit-user-select:none;user-select:none}.modal-overlay,.drawer-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#020812b3;display:grid;place-items:center;z-index:40}.modal-card{width:min(420px,92vw)}.drawer{width:min(1160px,96vw);max-height:90vh;background:var(--panel);border:1px solid var(--border);border-radius:16px;display:grid;grid-template-rows:auto auto minmax(0,1fr);gap:0;overflow:hidden}.drawer-header{display:flex;justify-content:space-between;align-items:flex-start;gap:14px;padding:16px;border-bottom:1px solid var(--border-soft);background:#0d1b30}.drawer-header p{color:var(--muted);margin-top:4px}.tabs{display:flex;gap:6px;flex-wrap:wrap;padding:10px 16px;border-bottom:1px solid var(--border-soft);background:#0f2036}.tab{border:0;border-bottom:2px solid transparent;background:transparent;color:#c5d6f1;border-radius:0;padding:8px 10px;min-height:34px}.tab.active{border-bottom-color:var(--primary);color:#fff;background:#3b82f61a;border-radius:8px 8px 0 0}.drawer-content{min-height:0;overflow:auto;border:0;border-radius:0;box-shadow:none;padding:16px}.drawer-footer{display:flex;justify-content:flex-end;gap:8px;padding-top:4px;margin-top:auto;position:sticky;bottom:0;background:linear-gradient(to bottom,#0d1a2d80,#0d1a2df2 30%)}.split-panels{display:grid;grid-template-columns:1fr 1fr;gap:10px}.list-row{display:grid;grid-template-columns:1fr auto auto auto;gap:8px;align-items:center}.nested-card{background:#0d1526}.row-between{display:flex;justify-content:space-between;align-items:center;gap:8px}.media-preview{border:1px solid #23344f;border-radius:12px;padding:10px;display:grid;gap:8px}.preview-image{max-height:180px;width:100%;object-fit:contain;border-radius:10px;background:#0b1220}.preview-video{max-height:220px;width:100%;border-radius:10px;background:#0b1220}@media (max-width: 1180px){.admin-shell{grid-template-columns:220px 1fr}.form-grid{grid-template-columns:repeat(2,minmax(180px,1fr))}.filter-grid{grid-template-columns:1fr 1fr}.split-panels{grid-template-columns:1fr}}@media (max-width: 860px){.admin-shell{grid-template-columns:1fr}.admin-sidebar{position:static;height:auto}.stats-grid{grid-template-columns:1fr}.page-header{flex-direction:column;align-items:stretch}.drawer{width:100vw;max-height:100vh;border-radius:0}}