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.level{background:linear-gradient(180deg,#ffffff05,#ffffff08);box-shadow:0 6px 18px #00000080}.level.a-level.Biology,.level.a-level.Chemistry,.level.a-level.English,.level.a-level.Maths,.level.a-level.Physics,.level.gcse.Biology,.level.gcse.Chemistry,.level.gcse.English,.level.gcse.Maths,.level.gcse.Physics{background:#fff;background:var(--chip-bg);color:#222;color:var(--chip-text)}[data-theme=dark] .level.gcse.Maths{background-color:#0f2b3f;color:#a2d2ff}[data-theme=dark] .level.a-level.Maths{background-color:#071532;color:#a2d2ff}[data-theme=dark] .level.gcse.Physics{background-color:#2b1a3b;color:#d4a5ff}[data-theme=dark] .level.a-level.Physics{background-color:#2a1835;color:#d4a5ff}[data-theme=dark] .level.gcse.Biology{background-color:#0f2f22;color:#b7efc5}[data-theme=dark] .level.a-level.Biology{background-color:#083825;color:#b7efc5}[data-theme=dark] .level.gcse.Chemistry{background-color:#3b1a14;color:#ffd6a5}[data-theme=dark] .level.a-level.Chemistry{background-color:#3f0f14;color:#ffd6a5}[data-theme=dark] .level.a-level.English,[data-theme=dark] .level.gcse.English{background-color:#3a2d10;color:#fff3b0}.level.active{background:#e2e8ed;background:var(--chip-selected-bg);border:1px solid #c6d0d6;border:1px solid var(--chip-selected-border);box-shadow:0 8px 20px #0a141e0f;color:#222;color:var(--chip-selected-text);transform:translateY(-2px)}[data-theme=dark] .level.active{background-color:#1d3557;background-color:var(--chip-active-bg);border:2px solid #1d3557;border:2px solid var(--accent);box-shadow:0 18px 36px #7fb3ff29,0 0 24px #7fb3ff0f;color:#fff;color:var(--chip-active-text)}.subject-button{align-items:center;background:#fff;background:var(--chip-bg);border:1px solid #e6eef9;border:1px solid var(--chip-border);border-radius:999px;box-shadow:0 6px 14px #080c140a;color:#222;color:var(--chip-text);cursor:pointer;display:inline-flex;flex:0 0 auto;font-weight:700;justify-content:center;margin:6px;min-width:120px;padding:10px 14px;scroll-snap-align:start;text-align:center;transition:transform .15s ease,box-shadow .15s ease,border-color .12s ease,background-color .12s ease,opacity .12s ease}.subject-button:hover{box-shadow:0 12px 30px #0a141e0f;filter:none;opacity:1;transform:translateY(-3px)}.subject-button:focus{box-shadow:0 0 0 4px #2563eb1f;outline:none}.subject-button:not(.active){opacity:.9}.subject-button.active{outline:none;transform:translateY(-3px);z-index:2}.subject-button.active,.subjects .subject-button.active{background:#e2e8ed;background:var(--chip-selected-bg);border:1px solid #c6d0d6;border:1px solid var(--chip-selected-border);box-shadow:0 8px 20px #0a141e0f;color:#222;color:var(--chip-selected-text)}.subject-button.active:focus{box-shadow:0 8px 20px #0a141e0f,0 0 0 4px #2563eb14}[data-theme=dark] .subject-button.active{background:linear-gradient(90deg,#fffffffa,#fffffffa);border:2px solid #1d3557;border:2px solid var(--accent);box-shadow:0 14px 34px #1d35572e;color:#fff;color:var(--chip-active-text)}[data-theme=dark] .subject-button{background:#ffffff05;box-shadow:0 8px 22px #00000080}.board-chip{align-items:center;background-color:#fff;background-color:var(--chip-bg);border:1px solid #e6eef9;border:1px solid var(--chip-border);border-radius:999px;color:#222;color:var(--chip-text);cursor:pointer;display:inline-flex;font-weight:700;justify-content:center;padding:10px 18px;transition:transform .12s ease,background .12s ease,box-shadow .12s}.board-chip:focus,.board-chip:hover{background:#1d35570f;background:var(--chip-hover-bg);transform:translateY(-2px)}.board-chip.active{background-color:#e2e8ed;background-color:var(--chip-selected-bg);border-color:#c6d0d6;border-color:var(--chip-selected-border);box-shadow:0 8px 20px #0a141e0f;color:#222;color:var(--chip-selected-text);transform:translateY(-2px)}[data-theme=dark] .board-chip.active{background-color:#1d3557;background-color:var(--chip-active-bg);border-color:#1d3557;border-color:var(--chip-active-bg);box-shadow:0 14px 34px #1d35572e;color:#fff;color:var(--chip-active-text);transform:translateY(-2px)}[data-theme=dark] .board-chip,[data-theme=dark] .category-chip,[data-theme=dark] .download-btn,[data-theme=dark] .level,[data-theme=dark] .section-buy,[data-theme=dark] .subject-button{background:#fff;background:var(--chip-bg);border:1px solid #e6eef9;border:1px solid var(--chip-border);box-shadow:none;color:#222;color:var(--chip-text)}[data-theme=dark] .category-chip.active,[data-theme=dark] .download-btn.active,[data-theme=dark] .level.active,[data-theme=dark] .section-buy.active,[data-theme=dark] .subject-button.active{background-color:#1d3557;background-color:var(--chip-active-bg);border-color:#1d3557;border-color:var(--chip-active-bg);box-shadow:0 18px 36px #7fb3ff29,0 0 24px #7fb3ff0f;color:#fff;color:var(--chip-active-text)}[data-theme=dark] .level.active,[data-theme=dark] .level.subject-button.active,[data-theme=dark] .subject-button.active{background:#1d3557!important;background:var(--chip-active-bg)!important;border-color:#1d3557!important;border-color:var(--chip-active-bg)!important;box-shadow:0 18px 36px #7fb3ff29,0 0 24px #7fb3ff0f!important;color:#fff!important;color:var(--chip-active-text)!important}[data-theme=dark] .level[class],[data-theme=dark] .subject-button[class]{background-color:#fff!important;background-color:var(--chip-bg)!important;border-color:#e6eef9!important;border-color:var(--chip-border)!important;box-shadow:none!important;color:#222!important;color:var(--chip-text)!important}[data-theme=dark] .dark-toggle:focus,[data-theme=dark] button:focus{box-shadow:0 0 0 4px #7fb3ff1f}.board-chip:focus,.level:focus,button:focus{border-radius:8px;box-shadow:0 0 0 3px #2563eb1f;outline:none}.resource-grid{grid-gap:1rem;display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));margin-top:2rem;padding:0 1rem}details.resource-section{background-color:#fff;background-color:var(--card);border-radius:12px;box-shadow:0 6px 20px #1414140f;padding:1rem 1rem .5rem}details.resource-section summary{align-items:center;cursor:pointer;display:flex;gap:12px;list-style:none;padding:.5rem 0}details.resource-section summary::-webkit-details-marker{display:none}.resource-title{color:#1d3557;color:var(--accent);font-weight:700}.resource-count{color:#666;color:var(--muted);font-size:.95rem;font-weight:600}.subheading-row{background:linear-gradient(90deg,#00000003,#0000);border-radius:6px;border-top:1px dashed #e6eef9;border-top:1px dashed var(--chip-border,#0000000f);list-style:none;margin-bottom:6px;margin-top:12px;padding:10px 12px}.subheading-title{align-items:center;color:#666;color:var(--muted);display:flex;font-size:.875rem;font-weight:700;gap:10px;text-transform:uppercase}.sub-icon{align-items:center;background:#fff;background:var(--chip-bg);border-radius:6px;box-shadow:0 1px 0 #00000005;color:#1d3557;color:var(--accent);display:inline-flex;font-size:14px;height:28px;justify-content:center;width:28px}.sub-title-text{letter-spacing:.4px}.sub-count-pill{background:#1d3557;background:var(--chip-active-bg);border-radius:999px;color:#fff;color:var(--chip-active-text,#fff);font-size:.85rem;font-weight:600;margin-left:auto;padding:4px 8px}.subfiles-wrapper{list-style:none;margin:0 0 8px;padding-left:20px}.subfiles{list-style:none;margin:6px 0 0;padding:0 0 0 6px}.subfile-row{align-items:center;border-bottom:1px dashed #e6eef9;border-bottom:1px dashed var(--chip-border);display:flex;gap:12px;padding:10px 0}.subfile-row .file-link{padding-left:6px;white-space:normal}.subfile-row .file-type{margin-left:auto;margin-right:8px}.subfile-row .download-btn{margin-left:0}.subfile-empty{color:#666;color:var(--muted);font-style:italic}.subfiles-wrapper+.subheading-row{margin-top:14px}.resource-section ul{list-style:none;margin:.5rem 0 1rem;padding:0}.resource-section li{align-items:center;border-bottom:1px dashed #e6eef9;border-bottom:1px dashed var(--chip-border);display:flex;gap:10px;padding:6px 0}.resource-section li:before{content:none}.resource-section a{color:#222;color:var(--text);text-decoration:none}.resource-section a:hover{color:#2563eb;color:var(--link);text-decoration:underline}.download-btn{align-items:center;background:#fff;background:var(--chip-bg);border:1px solid #e6eef9;border:1px solid var(--chip-border);border-radius:8px;box-shadow:0 4px 10px #0a141e0f;color:#2563eb;color:var(--link);display:inline-flex;height:34px;justify-content:center;margin-left:8px;text-decoration:none;transition:transform .12s ease,background .12s ease,color .12s ease;width:34px}.download-btn:hover{background:#1d35570f;background:var(--chip-hover-bg);color:#0b5ed7;color:var(--link-hover);transform:translateY(-2px)}.download-btn .download-icon{display:block;height:14px;width:14px}[data-theme=dark] .download-btn{background:#ffffff05;border:1px solid #ffffff0a}.file-type{background:#eef2ff;background:var(--file-bg);border-radius:999px;color:#3730a3;color:var(--file-text);font-size:.75rem;font-weight:700;padding:2px 8px;transition:background .18s ease,color .18s ease,box-shadow .18s ease}[data-theme=dark] .file-type{background:#1d3557;background:var(--chip-active-bg);border:1px solid #7fb3ff1f;box-shadow:0 8px 20px #7fb3ff14;color:#fff;color:var(--chip-active-text);padding:2px 10px}.resource-section li:hover{background:#2563eb05;background:var(--resource-hover);border-radius:6px}.skeleton-line{animation:shimmer 1.2s linear infinite;background:linear-gradient(90deg,#f3f4f6 25%,#e6eef9 37%,#f3f4f6 63%);background:linear-gradient(90deg,var(--skeleton-start) 25%,var(--skeleton-mid) 37%,var(--skeleton-start) 63%);background-size:400% 100%;border-radius:6px;height:12px;margin-bottom:8px;width:100%}@keyframes shimmer{0%{background-position:-400px 0}to{background-position:400px 0}}.category-chips{display:flex;flex-wrap:nowrap;gap:.5rem;justify-content:center;margin:1rem 0;overflow-x:auto;padding:.75rem .5rem}.category-chip{align-items:center;background:#fff;background:var(--chip-bg);border:1px solid #e6eef9;border:1px solid var(--chip-border);border-radius:999px;color:#222;color:var(--chip-text);cursor:pointer;display:inline-flex;flex:0 0 auto;font-weight:700;justify-content:center;padding:9px 14px;transition:transform .12s ease,background .12s ease,color .12s ease,box-shadow .12s;white-space:nowrap}.category-chip:focus,.category-chip:hover{background:#1d35570f;background:var(--chip-hover-bg);transform:translateY(-2px)}.category-chip.active{background:#e2e8ed;background:var(--chip-selected-bg);border-color:#c6d0d6;border-color:var(--chip-selected-border);box-shadow:0 8px 20px #0a141e0f;color:#222;color:var(--chip-selected-text)}[data-theme=dark] .category-chip.active{background:#1d3557;background:var(--chip-active-bg);border-color:#1d3557;border-color:var(--chip-active-bg);box-shadow:0 10px 24px #1d35571f;color:#fff;color:var(--chip-active-text)}.dark-toggle{align-items:center;background:#fff;background:var(--chip-bg);border:1px solid #e6eef9;border:1px solid var(--chip-border);border-radius:999px;box-shadow:0 4px 10px #0000000f;color:#222;color:var(--text);cursor:pointer;display:inline-flex;height:40px;justify-content:center;width:40px}.dark-toggle:focus{box-shadow:0 0 0 3px #2563eb1f;outline:none}@media (max-width:700px){.app{padding:1rem}.hero{margin-bottom:1rem}.level{padding:.75rem 1rem}.resource-title{font-size:1.05rem}details.resource-section{padding:.75rem .75rem .5rem}.resource-grid{grid-template-columns:1fr}}[data-theme=dark] .levels>button.active,[data-theme=dark] .levels>button.level.active,[data-theme=dark] .subjects .subject-button.active{background:#1d3557!important;background:var(--chip-active-bg)!important;border-color:#1d3557!important;border-color:var(--chip-active-bg)!important;box-shadow:0 18px 36px #7fb3ff29 !important,0 0 24px #7fb3ff0f!important;color:#fff!important;color:var(--chip-active-text)!important}.admin-page{display:flex;flex-direction:column;gap:1rem;padding:1.5rem}.admin-card{background:#fff;background:var(--card);border:1px solid #e6eef9;border:1px solid var(--chip-border);border-radius:14px;box-shadow:0 14px 30px #00000014;padding:1.25rem}.admin-head{align-items:center;display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between}.admin-form{display:flex;flex-direction:column;gap:1rem}.admin-grid{grid-gap:12px;display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.admin-field{display:flex;flex-direction:column;font-weight:700;gap:6px}.drop-zone{background:#2563eb05;background:var(--resource-hover);border:1.5px dashed #e6eef9;border:1.5px dashed var(--chip-border);border-radius:12px;padding:1.25rem;text-align:center}.drop-zone input{margin-top:8px}.file-list{display:flex;flex-direction:column;gap:10px}.file-chip{align-items:center;background:#fff;background:var(--chip-bg);border:1px solid #e6eef9;border:1px solid var(--chip-border);border-radius:10px;display:flex;justify-content:space-between;padding:10px 12px}.upload-results{grid-gap:10px;display:grid;gap:10px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}.upload-result{background:#fff;background:var(--chip-bg);border:1px solid #e6eef9;border:1px solid var(--chip-border);border-radius:12px;padding:10px 12px}.upload-result-head{align-items:center;display:flex;gap:8px;justify-content:space-between}.admin-actions{display:flex;flex-wrap:wrap;gap:10px}.qgen-page{margin:0 auto;max-width:900px;padding:1.5rem 1rem 3rem}.qgen-title{color:#222;color:var(--text);font-size:1.75rem;margin-bottom:.25rem;text-align:center}.qgen-subtitle{color:#666;color:var(--muted);margin-bottom:1.5rem;text-align:center}.qgen-section{background:#fff;background:var(--card);border:1px solid #e6eef9;border:1px solid var(--chip-border);border-radius:14px;box-shadow:0 8px 24px #0000000a;margin-bottom:1rem;padding:1.25rem}.qgen-section h3{color:#222;color:var(--text);font-size:1rem;margin:0 0 .75rem}.qgen-row{display:flex;flex-wrap:wrap;gap:1rem;margin-bottom:.75rem}.qgen-field{display:flex;flex-direction:column;gap:6px;min-width:180px}.qgen-field label{color:#222;color:var(--text);font-size:.9rem;font-weight:700}.qgen-field-wide{flex:1 1}.qgen-input,.qgen-textarea{background:#fff;background:var(--card);border:1px solid #e6eef9;border:1px solid var(--chip-border);border-radius:10px;color:#222;color:var(--text);font-size:.95rem;padding:10px 12px}.qgen-input:focus,.qgen-textarea:focus{border-color:#1d3557;border-color:var(--accent);box-shadow:0 0 0 3px #2563eb1a;outline:none}.qgen-input-sm{font-size:1.1rem;max-width:100px;min-width:80px;text-align:center}.qgen-textarea{font-family:inherit;min-height:72px;resize:vertical}.qgen-chips{display:flex;flex-wrap:nowrap;gap:8px}.qgen-chips-wrap{flex-wrap:wrap}.qgen-chip{background:#fff;background:var(--chip-bg);border:1px solid #e6eef9;border:1px solid var(--chip-border);border-radius:999px;color:#222;color:var(--chip-text);cursor:pointer;font-size:.88rem;font-weight:700;padding:8px 14px;transition:all .12s ease;white-space:nowrap}.qgen-chip:hover{background:#1d35570f;background:var(--chip-hover-bg);transform:translateY(-1px)}.qgen-chip.active{background:#e2e8ed;background:var(--chip-selected-bg,var(--accent));border-color:#c6d0d6;border-color:var(--chip-selected-border,var(--accent));box-shadow:0 6px 16px #00000014;color:#222;color:var(--chip-selected-text,#fff)}.qgen-drop{background:#2563eb05;background:var(--resource-hover,#00000005);border:1.5px dashed #e6eef9;border:1.5px dashed var(--chip-border);border-radius:12px;padding:1rem;text-align:center}.qgen-file-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}.qgen-file-chip{align-items:center;background:#fff;background:var(--chip-bg);border:1px solid #e6eef9;border:1px solid var(--chip-border);border-radius:10px;display:inline-flex;font-size:.85rem;gap:8px;padding:6px 12px}.qgen-file-remove{background:none;border:none;color:#c1121f;cursor:pointer;font-size:1rem;font-weight:700;padding:0 2px}.qgen-mode-cards{display:flex;flex-wrap:wrap;gap:12px}.qgen-mode-card{background:#fff;background:var(--card-bg,#fff);border:2px solid #e0e0e0;border:2px solid var(--border,#e0e0e0);border-radius:12px;cursor:pointer;display:flex;flex:1 1;flex-direction:column;gap:6px;min-width:200px;padding:16px;text-align:left;transition:border-color .2s,box-shadow .2s,transform .15s}.qgen-mode-card strong{color:#222;color:var(--text,#1a1a2e);font-size:1.05rem}.qgen-mode-card span{color:#888;color:var(--text-muted,#888);font-size:.85rem;line-height:1.4}.qgen-mode-card:hover{border-color:#1d3557;box-shadow:0 2px 8px #1d355714;transform:translateY(-1px)}.qgen-mode-card.active{background:linear-gradient(135deg,#1d35570f,#457b9d0f);border-color:#1d3557;box-shadow:0 2px 12px #1d355721}.qgen-generate-btn{background:linear-gradient(135deg,#1d3557,#457b9d);border:none;border-radius:12px;box-shadow:0 12px 28px #1d355733;color:#fff;cursor:pointer;display:block;font-size:1.1rem;font-weight:800;padding:14px;transition:transform .12s,box-shadow .12s;width:100%}.qgen-generate-btn:hover:not(:disabled){box-shadow:0 16px 36px #1d355747;transform:translateY(-2px)}.qgen-generate-btn:disabled{cursor:not-allowed;opacity:.5}.qgen-loading{padding:3rem 1rem;text-align:center}.qgen-spinner{animation:qgen-spin .8s linear infinite;border:4px solid #e6eef9;border-top-color:#1d3557;border:4px solid var(--chip-border);border-radius:50%;border-top-color:var(--accent,#1d3557);height:48px;margin:0 auto 1rem;width:48px}@keyframes qgen-spin{to{transform:rotate(1turn)}}.qgen-error{background:#ffe9e6;border:1px solid #f3c6c0;border-radius:10px;color:#c1121f;font-weight:600;margin:.75rem 0;padding:10px 14px}[data-theme=dark] .qgen-error{background:#c1121f1f;border-color:#c1121f4d}[data-theme=dark] .qgen-mode-card{background:#1e1e2e;background:var(--card-bg,#1e1e2e);border-color:#333;border-color:var(--border,#333)}[data-theme=dark] .qgen-mode-card strong{color:#222;color:var(--text,#e0e0e0)}[data-theme=dark] .qgen-mode-card:hover{border-color:#457b9d;box-shadow:0 2px 8px #457b9d26}[data-theme=dark] .qgen-mode-card.active{background:linear-gradient(135deg,#457b9d1f,#1d35571f);border-color:#457b9d;box-shadow:0 2px 12px #457b9d33}.qgen-preview-header{align-items:flex-start;display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between;margin-bottom:1rem}.qgen-preview-actions{display:flex;flex-wrap:wrap;gap:8px}.qgen-btn{border:none;border-radius:10px;cursor:pointer;font-size:.9rem;font-weight:700;padding:10px 16px;transition:transform .12s}.qgen-btn:hover:not(:disabled){transform:translateY(-1px)}.qgen-btn:disabled{cursor:not-allowed;opacity:.5}.qgen-btn.primary{background:linear-gradient(135deg,#1d3557,#457b9d);box-shadow:0 8px 20px #1d355726;color:#fff}.qgen-btn.secondary{background:#fff;background:var(--chip-bg);border:1px solid #e6eef9;border:1px solid var(--chip-border);color:#222;color:var(--text)}.qgen-btn.ms{background:linear-gradient(135deg,#065f46,#10b981);box-shadow:0 8px 20px #065f4626;color:#fff}.qgen-pdf-viewer{margin:1rem 0}.qgen-diagram-img-wrap{margin:10px 0;text-align:center}.qgen-diagram-img{border:1px solid #e6eef9;border:1px solid var(--chip-border);border-radius:10px;box-shadow:0 4px 12px #0000000f;max-height:400px;max-width:100%}.qgen-questions-list{display:flex;flex-direction:column;gap:12px}.qgen-q-card{background:#fff;background:var(--card);border:1px solid #e6eef9;border:1px solid var(--chip-border);border-radius:12px;box-shadow:0 6px 18px #0000000a;padding:1rem}.qgen-q-head{align-items:center;display:flex;gap:10px;margin-bottom:6px}.qgen-q-num{align-items:center;background:#1d3557;border-radius:50%;color:#fff;display:inline-flex;font-size:.85rem;font-weight:800;height:30px;justify-content:center;width:30px}.qgen-q-type{border-radius:999px;font-size:.75rem;font-weight:700;letter-spacing:.03em;padding:3px 10px;text-transform:uppercase}.qgen-q-type.short{background:#dbeafe;color:#1d4ed8}.qgen-q-type.mcq{background:#d1fae5;color:#065f46}.qgen-q-type.extended{background:#fef3c7;color:#92400e}.qgen-q-type.parent{background:#ede9fe;color:#5b21b6}[data-theme=dark] .qgen-q-type.short{background:#3b82f633;color:#93c5fd}[data-theme=dark] .qgen-q-type.mcq{background:#10b98133;color:#6ee7b7}[data-theme=dark] .qgen-q-type.extended{background:#f59e0b33;color:#fcd34d}[data-theme=dark] .qgen-q-type.parent{background:#8b5cf633;color:#c4b5fd}.qgen-q-marks{color:#666;color:var(--muted);font-size:.8rem;font-weight:700;margin-left:auto}.qgen-q-text{line-height:1.5;margin:0}.qgen-diagram-note{background:#2563eb05;background:var(--resource-hover,#00000005);border-radius:8px;color:#666;color:var(--muted);font-size:.88rem;font-style:italic;margin:6px 0;padding:8px 12px}.qgen-options{margin:6px 0 0 8px}.qgen-option{align-items:center;display:flex;gap:8px;padding:4px 0}.qgen-option-letter{align-items:center;border:1.5px solid #e6eef9;border:1.5px solid var(--chip-border);border-radius:50%;color:#666;color:var(--muted);display:inline-flex;font-size:.8rem;font-weight:800;height:24px;justify-content:center;width:24px}.qgen-parts{margin:8px 0 0 12px}.qgen-part{border-bottom:1px dashed #e6eef9;border-bottom:1px dashed var(--chip-border);display:flex;gap:8px;padding:4px 0}.qgen-part-label{color:#666;color:var(--muted);font-weight:700;min-width:28px}@media (max-width:640px){.qgen-preview-header,.qgen-row{flex-direction:column}.qgen-preview-actions{width:100%}.qgen-btn{flex:1 1;text-align:center}}
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