:root{--bg-primary: #0a0a0f;--bg-secondary: #111118;--bg-card: #16161e;--bg-hover: #1e1e2a;--border: #2a2a3a;--border-light: #363650;--text-primary: #e8e8f0;--text-secondary:#8888aa;--text-muted: #555570;--green: #00d084;--green-dim: rgba(0,208,132,.12);--purple: #9d6fff;--purple-dim: rgba(157,111,255,.12);--blue: #4da6ff;--blue-dim: rgba(77,166,255,.1);--orange: #ff9f43;--orange-dim: rgba(255,159,67,.1);--red: #ff5c5c;--red-dim: rgba(255,92,92,.1);--font-sans: "Space Grotesk", sans-serif;--font-mono: "JetBrains Mono", monospace;--r-sm: 6px;--r-md: 10px;--r-lg: 14px;--r-xl: 20px;--ease: all .18s ease;--sidebar-w: 220px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background:var(--bg-primary);color:var(--text-primary);min-height:100vh;line-height:1.6}a{color:inherit;text-decoration:none}button{cursor:pointer;font-family:var(--font-sans)}textarea,input,select{font-family:var(--font-sans)}::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-light);border-radius:3px}.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;background:radial-gradient(ellipse at top,rgba(0,208,132,.08) 0%,transparent 60%),var(--bg-primary);padding:16px}.login-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-xl);padding:40px 36px;width:100%;max-width:420px}.login-logo{font-size:1.2rem;font-weight:700;letter-spacing:-.02em;margin-bottom:24px;color:var(--green)}.login-card h2{font-size:1.4rem;font-weight:700;margin-bottom:6px}.login-sub{color:var(--text-secondary);font-size:.875rem;margin-bottom:28px}.login-hint{text-align:center;margin-top:18px;font-size:.75rem;color:var(--text-muted);background:var(--bg-secondary);padding:8px 12px;border-radius:var(--r-sm)}.hamburger{display:none;position:fixed;top:14px;left:14px;z-index:3000;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-sm);width:38px;height:38px;flex-direction:column;align-items:center;justify-content:center;gap:5px;padding:0;transition:var(--ease)}.hamburger span{display:block;width:18px;height:2px;background:var(--text-primary);border-radius:2px;transition:var(--ease)}.hamburger:hover{background:var(--bg-hover)}.sidebar-overlay{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:1500}.sidebar-overlay.active{display:block}.layout{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-w);flex-shrink:0;background:var(--bg-secondary);border-right:1px solid var(--border);display:flex;flex-direction:column;position:sticky;top:0;height:100vh;overflow-y:auto;transition:transform .25s ease;z-index:2000}.sidebar-logo{padding:20px 18px;font-size:1rem;font-weight:700;color:var(--green);letter-spacing:-.02em;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:8px}.sidebar-nav{flex:1;padding:12px 10px;display:flex;flex-direction:column;gap:4px}.nav-btn{display:flex;align-items:center;gap:10px;width:100%;padding:9px 12px;border-radius:var(--r-sm);background:none;border:none;color:var(--text-secondary);font-size:.85rem;font-weight:500;text-align:left;transition:var(--ease)}.nav-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.nav-btn.active{background:var(--green-dim);color:var(--green)}.sidebar-bottom{padding:14px 10px;border-top:1px solid var(--border);display:flex;flex-direction:column;gap:8px}.admin-name{font-size:.8rem;font-weight:600;color:var(--text-secondary);padding:0 4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.content{flex:1;min-width:0;padding:28px 24px;overflow-y:auto}.page-header{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:14px;margin-bottom:20px}.page-header h1{font-size:1.4rem;font-weight:700}.page-header p{color:var(--text-secondary);font-size:.85rem;margin-top:2px}.header-actions{display:flex;gap:8px;flex-wrap:wrap}.filter-row{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:14px}.mini-stats{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}.mini-stat{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-sm);padding:6px 14px;font-size:.78rem;font-weight:500;color:var(--text-secondary)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px}.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-lg);padding:24px;text-align:center;transition:var(--ease)}.stat-card:hover{border-color:var(--border-light)}.stat-icon{font-size:1.6rem;margin-bottom:10px}.stat-val{font-size:2rem;font-weight:800;font-family:var(--font-mono);color:var(--green)}.stat-label{font-size:.75rem;color:var(--text-muted);margin-top:4px;text-transform:uppercase;letter-spacing:.06em}.table-wrap{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden;overflow-x:auto;-webkit-overflow-scrolling:touch}.table{width:100%;border-collapse:collapse;min-width:700px}.table thead tr{background:var(--bg-secondary);border-bottom:1px solid var(--border)}.table th{padding:10px 14px;text-align:left;font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted);white-space:nowrap}.table tbody tr{border-bottom:1px solid var(--border);transition:background .12s}.table tbody tr:last-child{border-bottom:none}.table tbody tr:hover{background:var(--bg-hover)}.table td{padding:10px 14px;vertical-align:middle;font-size:.84rem}.loading-row{text-align:center;padding:56px;color:var(--text-muted);font-size:.875rem}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--r-sm);font-size:.84rem;font-weight:500;font-family:var(--font-sans);border:1px solid transparent;transition:var(--ease);white-space:nowrap;cursor:pointer}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-primary{background:var(--green);color:#000;border-color:var(--green)}.btn-primary:hover:not(:disabled){background:#00f09a;box-shadow:0 4px 16px #00d0844d}.btn-secondary{background:var(--bg-card);color:var(--text-primary);border-color:var(--border)}.btn-secondary:hover:not(:disabled){background:var(--bg-hover);border-color:var(--border-light)}.btn-ghost{background:transparent;color:var(--text-secondary);border-color:var(--border)}.btn-ghost:hover:not(:disabled){background:var(--bg-hover);color:var(--text-primary)}.btn-danger{background:var(--red-dim);color:var(--red);border-color:var(--red)}.btn-danger:hover:not(:disabled){background:#ff5c5c33}.btn-sm{padding:5px 10px;font-size:.76rem}.w-full{width:100%;justify-content:center}.field{display:flex;flex-direction:column;gap:5px;margin-bottom:14px}.field label{font-size:.78rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.04em}.input{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--r-sm);padding:9px 12px;font-size:.875rem;color:var(--text-primary);width:100%;transition:var(--ease);outline:none}.input:focus{border-color:var(--green);box-shadow:0 0 0 3px var(--green-dim)}.input::placeholder{color:var(--text-muted)}select.input{cursor:pointer}.badge{display:inline-flex;align-items:center;padding:2px 8px;border-radius:4px;font-size:.72rem;font-weight:600;letter-spacing:.02em}.badge-easy{background:#00d0841f;color:var(--green)}.badge-medium{background:#ff9f431a;color:var(--orange)}.badge-hard{background:#ff5c5c1a;color:var(--red)}.badge-orange{background:var(--orange-dim);color:var(--orange)}.badge-green{background:var(--green-dim);color:var(--green)}.badge-info{background:var(--blue-dim);color:var(--blue)}.toggle{position:relative;display:inline-block;width:40px;height:22px}.toggle input{opacity:0;width:0;height:0}.toggle-slider{position:absolute;top:0;right:0;bottom:0;left:0;cursor:pointer;background:var(--bg-hover);border:1px solid var(--border);border-radius:22px;transition:var(--ease)}.toggle-slider:before{content:"";position:absolute;width:16px;height:16px;border-radius:50%;left:2px;bottom:2px;background:var(--text-muted);transition:var(--ease)}.toggle input:checked+.toggle-slider{background:var(--green-dim);border-color:var(--green)}.toggle input:checked+.toggle-slider:before{transform:translate(18px);background:var(--green)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:5000;display:flex;align-items:center;justify-content:center;padding:16px}.modal{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-xl);padding:28px 28px 24px;width:100%;max-width:560px;max-height:90vh;overflow-y:auto;position:relative;animation:popIn .2s ease}.large-modal{max-width:760px}.modal-close{position:absolute;top:16px;right:16px;background:var(--bg-hover);border:1px solid var(--border);border-radius:var(--r-sm);width:30px;height:30px;display:flex;align-items:center;justify-content:center;font-size:.8rem;color:var(--text-secondary);transition:var(--ease)}.modal-close:hover{color:var(--text-primary);background:var(--bg-secondary)}.modal h2{font-size:1.1rem;font-weight:700;margin-bottom:20px}.modal-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}.starter-details summary{cursor:pointer;font-size:.83rem;font-weight:600;color:var(--text-secondary);padding:10px 0;-webkit-user-select:none;user-select:none;border-top:1px solid var(--border);margin-top:10px}.starter-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 16px;margin-top:14px}.font-mono{font-family:var(--font-mono);font-size:.78rem}.del-preview{background:var(--bg-secondary);border:1px solid var(--border-light);border-radius:var(--r-sm);padding:12px 14px;font-size:.82rem;margin-top:12px;color:var(--orange)}.preview-found{color:var(--orange)}.preview-note{font-size:.8rem;line-height:1.6}.error-msg{background:var(--red-dim);border:1px solid rgba(255,92,92,.3);border-radius:var(--r-sm);padding:8px 12px;font-size:.82rem;color:var(--red);margin-bottom:14px}.toast-container{position:fixed;bottom:20px;right:20px;z-index:9999;display:flex;flex-direction:column;gap:8px;pointer-events:none}.toast{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-md);padding:11px 16px;font-size:.83rem;min-width:240px;display:flex;align-items:center;gap:10px;animation:slideUp .25s ease}.toast.success{border-left:3px solid var(--green)}.toast.error{border-left:3px solid var(--red)}.toast.info{border-left:3px solid var(--blue)}.toast.warning{border-left:3px solid var(--orange)}.spinner{display:inline-block;width:18px;height:18px;border:2px solid rgba(255,255,255,.08);border-top-color:var(--green);border-radius:50%;animation:spin .7s linear infinite;flex-shrink:0}.spinner-lg{width:36px;height:36px;border-width:3px;border-color:#00d0841f;border-top-color:var(--green)}.hidden{display:none!important}.divider{height:1px;background:var(--border);margin:14px 0}.mono{font-family:var(--font-mono)}.muted{color:var(--text-muted)}.text-purple{color:var(--purple)}.text-green{color:var(--green)}.text-red{color:var(--red)}.user-cell{display:flex;align-items:center;gap:10px}.user-avatar{width:32px;height:32px;border-radius:50%;flex-shrink:0;background:linear-gradient(135deg,var(--purple),var(--blue));display:flex;align-items:center;justify-content:center;font-size:.7rem;font-weight:700;color:#fff}.user-name{font-weight:500;font-size:.875rem}.action-btns{display:flex;gap:6px;flex-wrap:wrap}.admin-row{background:#9d6fff0a}.prob-title{font-weight:500;font-size:.875rem;max-width:220px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.prob-sub{font-size:.72rem;color:var(--text-muted);margin-top:2px}.tags-cell{max-width:180px}.tag-chip{display:inline-block;margin:2px;padding:2px 7px;border-radius:4px;background:var(--bg-hover);font-size:.68rem;color:var(--text-secondary)}@keyframes spin{to{transform:rotate(360deg)}}@keyframes popIn{0%{transform:scale(.95);opacity:0}to{transform:scale(1);opacity:1}}@keyframes slideUp{0%{transform:translateY(14px);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes pageIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.page-animate{animation:pageIn .3s ease}@media (max-width: 1024px){:root{--sidebar-w: 200px}.content{padding:22px 18px}.large-modal{max-width:96vw}.prob-title{max-width:160px}.tags-cell{max-width:140px}}@media (max-width: 768px){:root{--sidebar-w: 220px}.hamburger{display:flex}.sidebar{position:fixed;top:0;left:0;height:100vh;transform:translate(-100%);box-shadow:4px 0 24px #00000080}.sidebar.open{transform:translate(0)}.layout{display:block}.content{padding:64px 16px 24px;min-height:100vh}.page-header{flex-direction:column;align-items:flex-start}.page-header h1{font-size:1.2rem}.header-actions{width:100%}.header-actions .btn{flex:1;justify-content:center;font-size:.78rem;padding:7px 10px}.filter-row .input{max-width:100%!important}.mini-stats{flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;padding-bottom:4px}.mini-stat{flex-shrink:0}.stats-grid{grid-template-columns:1fr 1fr;gap:12px}.stat-card{padding:18px 14px}.stat-val{font-size:1.6rem}.modal-overlay{padding:10px;align-items:flex-end}.modal{max-width:100%;border-radius:var(--r-xl) var(--r-xl) 0 0;max-height:92vh;padding:22px 18px 20px;animation:slideUp .25s ease}.large-modal{max-width:100%}.modal-grid,.starter-grid{grid-template-columns:1fr;gap:0}.toast-container{left:12px;right:12px;bottom:12px}.toast{min-width:unset;width:100%}.login-card{padding:28px 20px;border-radius:var(--r-lg)}}@media (max-width: 480px){.content{padding:58px 12px 20px}.page-header h1{font-size:1.1rem}.page-header p{font-size:.78rem}.header-actions{display:grid;grid-template-columns:1fr 1fr;gap:6px}.header-actions .btn{width:100%;font-size:.74rem;padding:7px 8px}.filter-row{flex-direction:column;align-items:stretch}.filter-row .input,.filter-row select{max-width:100%!important;width:100%}.stats-grid{grid-template-columns:1fr}.table th:nth-child(3),.table td:nth-child(3),.table th:nth-child(4),.table td:nth-child(4){display:none}.prob-sub,.tags-cell{display:none}.action-btns{flex-direction:column;gap:4px}.action-btns .btn-sm{width:100%;justify-content:center}.modal{padding:18px 14px 16px}.modal h2{font-size:1rem;margin-bottom:14px}.login-card{padding:24px 16px}.login-logo{font-size:1rem;margin-bottom:18px}}@media (max-width: 360px){.content{padding:54px 10px 16px}.table th,.table td{padding:7px 8px;font-size:.72rem}.btn{padding:7px 12px;font-size:.78rem}.stat-val{font-size:1.4rem}.table th:nth-child(5),.table td:nth-child(5){display:none}}