:root{--bg-color:#080c14;--card-bg:rgba(17,25,40,.75);--modal-bg:rgba(13,20,32,.95);--border-color:hsla(0,0%,100%,.08);--text-primary:#f3f4f6;--text-secondary:#9ca3af;--accent-purple:#8b5cf6;--accent-blue:#3b82f6;--accent-cyan:#06b6d4;--success:#10b981;--danger:#ef4444;--font-sans:"Outfit",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen,Ubuntu,Cantarell,"Open Sans","Helvetica Neue",sans-serif;--shadow:0 8px 32px 0 rgba(0,0,0,.37);--gradient:linear-gradient(135deg,var(--accent-purple),var(--accent-blue))}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-primary);font-family:var(--font-sans);min-height:100vh;overflow-x:hidden;background-image:radial-gradient(circle at 10% 20%,rgba(139,92,246,.08) 0,transparent 45%),radial-gradient(circle at 90% 80%,rgba(6,182,212,.08) 0,transparent 45%),linear-gradient(hsla(0,0%,100%,.003) 1px,transparent 0),linear-gradient(90deg,hsla(0,0%,100%,.003) 1px,transparent 0);background-size:100% 100%,100% 100%,40px 40px,40px 40px;background-attachment:fixed}.container{max-width:1200px;margin:0 auto;padding:2.5rem 1.5rem}header{display:flex;justify-content:space-between;align-items:center;margin-bottom:3rem;border-bottom:1px solid var(--border-color);padding-bottom:1.5rem}h1{font-size:2.25rem;font-weight:800;background:linear-gradient(90deg,#fff,#93c5fd,#c084fc);-webkit-background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:-.025em}h1 span{font-size:.875rem;text-transform:uppercase;letter-spacing:.15em;display:block;color:var(--accent-cyan);margin-bottom:.25rem}.btn,h1 span{font-weight:600}.btn{font-family:var(--font-sans);font-size:.95rem;padding:.65rem 1.25rem;border-radius:8px;border:none;cursor:pointer;transition:all .25s cubic-bezier(.4,0,.2,1);display:inline-flex;align-items:center;gap:.5rem;text-decoration:none}.btn-primary{background:var(--gradient);color:#fff;box-shadow:0 4px 14px 0 rgba(139,92,246,.3)}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px 0 rgba(139,92,246,.5);filter:brightness(1.1)}.btn-secondary{background:hsla(0,0%,100%,.05);border:1px solid var(--border-color);color:var(--text-primary)}.btn-secondary:hover{background:hsla(0,0%,100%,.1);transform:translateY(-1px)}.btn-danger{background:rgba(239,68,68,.1);color:var(--danger);border:1px solid rgba(239,68,68,.2)}.btn-danger:hover{background:var(--danger);color:#fff;transform:translateY(-1px)}.toolbar{justify-content:space-between;align-items:center;gap:1rem;margin-bottom:2rem}.filters,.toolbar{display:flex;flex-wrap:wrap}.filters{gap:.75rem}.select-wrapper{position:relative}input[type=text],select,textarea{background:hsla(0,0%,100%,.03);border:1px solid var(--border-color);border-radius:8px;color:var(--text-primary);padding:.6rem 1rem;font-family:var(--font-sans);font-size:.9rem;outline:none;transition:all .2s ease;min-width:120px}input[type=text]:focus,select:focus,textarea:focus{border-color:var(--accent-blue);box-shadow:0 0 0 2px rgba(59,130,246,.2);background:hsla(0,0%,100%,.06)}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));grid-gap:1.5rem;gap:1.5rem}.card{background:var(--card-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border-color);border-radius:12px;padding:1.5rem;box-shadow:var(--shadow);display:flex;flex-direction:column;justify-content:space-between;min-height:250px;transition:all .3s cubic-bezier(.4,0,.2,1)}.card:hover{transform:translateY(-4px);border-color:rgba(139,92,246,.25);box-shadow:0 12px 30px 0 rgba(0,0,0,.4)}.card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.badge{font-size:.75rem;font-weight:700;text-transform:uppercase;padding:.25rem .6rem;border-radius:20px;letter-spacing:.05em}.badge-math{background:rgba(59,130,246,.15);color:var(--accent-blue);border:1px solid rgba(59,130,246,.3)}.badge-science{background:rgba(16,185,129,.15);color:var(--success);border:1px solid rgba(16,185,129,.3)}.badge-default{background:hsla(0,0%,100%,.05);border:1px solid var(--border-color)}.badge-default,.meta-info{color:var(--text-secondary)}.meta-info{display:flex;gap:.5rem;font-size:.8rem;font-weight:500}.question-text{font-size:1.15rem;font-weight:600;line-height:1.4;margin-bottom:1.25rem;color:#fff}.choices-list{display:flex;flex-direction:column;gap:.5rem;margin-bottom:1.5rem}.choice-item{font-size:.9rem;background:hsla(0,0%,100%,.02);border:1px solid var(--border-color);padding:.5rem .75rem;border-radius:6px;color:var(--text-secondary);display:flex;align-items:center;gap:.5rem}.choice-item.correct{background:rgba(16,185,129,.08);border-color:rgba(16,185,129,.25);color:var(--success);font-weight:600}.explanation-box{background:hsla(0,0%,100%,.015);border-left:2px solid var(--accent-purple);padding:.5rem .75rem;font-size:.8rem;color:var(--text-secondary);font-style:italic;margin-bottom:1.5rem;border-radius:0 4px 4px 0}.card-actions{display:flex;gap:.5rem;justify-content:flex-end;border-top:1px solid var(--border-color);padding-top:1rem}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.7);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);display:flex;justify-content:center;align-items:center;z-index:1000;padding:1.5rem;animation:fadeIn .25s ease-out}.modal-content{background:var(--modal-bg);border:1px solid hsla(0,0%,100%,.12);border-radius:16px;width:100%;max-width:600px;padding:2rem;box-shadow:0 24px 48px rgba(0,0,0,.5);animation:slideUp .3s cubic-bezier(.16,1,.3,1)}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;border-bottom:1px solid var(--border-color);padding-bottom:1rem}.modal-title{font-size:1.5rem;font-weight:700;color:#fff}.form-group{margin-bottom:1.25rem}.form-group label{display:block;font-size:.85rem;font-weight:600;color:var(--text-secondary);margin-bottom:.5rem;text-transform:uppercase;letter-spacing:.05em}.form-grid-2{display:grid;grid-template-columns:1fr 1fr;grid-gap:1rem;gap:1rem}.form-group input[type=text],.form-group select,.form-group textarea{width:100%}.choices-form-list{display:flex;flex-direction:column;gap:.5rem}.choice-input-wrapper{display:flex;align-items:center;gap:.5rem}.choice-radio{accent-color:var(--accent-purple);width:1.2rem;height:1.2rem;cursor:pointer}.modal-actions{display:flex;justify-content:flex-end;gap:.75rem;border-top:1px solid var(--border-color);padding-top:1.5rem;margin-top:1.5rem}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.empty-state{text-align:center;padding:4rem 2rem;background:var(--card-bg);border:1px dashed var(--border-color);border-radius:12px;color:var(--text-secondary);font-size:1.1rem}.view-toggle{display:inline-flex;background:hsla(0,0%,100%,.02);border:1px solid var(--border-color);padding:.25rem;border-radius:8px;gap:.25rem}.view-toggle-btn{background:none;border:none;color:var(--text-secondary);padding:.4rem .8rem;cursor:pointer;border-radius:6px;transition:all .2s ease;display:flex;align-items:center;gap:.35rem;font-family:var(--font-sans);font-size:.85rem;font-weight:600}.view-toggle-btn:hover{color:#fff;background:hsla(0,0%,100%,.04)}.view-toggle-btn.active{background:var(--gradient);color:#fff;box-shadow:0 2px 8px rgba(139,92,246,.3)}.table-container{width:100%;overflow-x:auto;background:var(--card-bg);border:1px solid var(--border-color);border-radius:12px;box-shadow:var(--shadow);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}.admin-table{width:100%;border-collapse:collapse;text-align:left}.admin-table th{padding:1rem 1.25rem;font-weight:700;color:var(--text-secondary);font-size:.8rem;text-transform:uppercase;letter-spacing:.05em;background:rgba(0,0,0,.2)}.admin-table td,.admin-table th{border-bottom:1px solid var(--border-color)}.admin-table td{padding:1.1rem 1.25rem;vertical-align:middle;font-size:.95rem}.admin-table tr:last-child td{border-bottom:none}.admin-table tr:hover td{background:hsla(0,0%,100%,.015)}.table-question-id{font-family:monospace;font-size:.8rem;background:hsla(0,0%,100%,.05);padding:.2rem .4rem;border-radius:4px;color:var(--accent-cyan)}.table-question-text{font-weight:600;color:#fff;max-width:400px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.table-choices-compact{display:flex;gap:.4rem;flex-wrap:wrap}.choice-bubble{font-size:.75rem;padding:.15rem .45rem;border-radius:4px;background:hsla(0,0%,100%,.02);border:1px solid var(--border-color);color:var(--text-secondary)}.choice-bubble.correct{background:rgba(16,185,129,.08);border-color:rgba(16,185,129,.2);color:var(--success);font-weight:600}.bulk-section{display:grid;grid-template-columns:1fr 1fr;grid-gap:1.5rem;gap:1.5rem;margin-bottom:2.5rem}@media (max-width:768px){.bulk-section{grid-template-columns:1fr}}.bulk-card{background:var(--card-bg);border:1px solid var(--border-color);border-radius:12px;padding:1.5rem;box-shadow:var(--shadow);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);display:flex;flex-direction:column;justify-content:space-between;min-height:180px;transition:all .3s ease}.bulk-card:hover{border-color:rgba(139,92,246,.2);transform:translateY(-2px)}.bulk-card-title{font-size:1.2rem;font-weight:700;color:#fff;margin-bottom:.5rem;display:flex;align-items:center;gap:.5rem}.bulk-card-desc{font-size:.9rem;color:var(--text-secondary);line-height:1.5;margin-bottom:1.5rem}.file-upload-area{position:relative;border:2px dashed rgba(139,92,246,.3);background:rgba(139,92,246,.01);border-radius:8px;padding:1.5rem;text-align:center;cursor:pointer;transition:all .2s ease}.file-upload-area:hover{border-color:var(--accent-cyan);background:rgba(6,182,212,.03)}.file-upload-input{position:absolute;top:0;left:0;width:100%;height:100%;opacity:0;cursor:pointer}.file-upload-text{font-size:.85rem;font-weight:600;color:var(--text-secondary)}.file-upload-text span{color:var(--accent-cyan);text-decoration:underline}