@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');
:root{--bg:#f0f4f8;--bg2:#fff;--bg3:#f7f9fc;--surface:#edf2f7;--surface2:#e2e8f0;--border:#d4dce8;--border2:#c5d0de;--text:#1a2332;--text2:#4a5568;--text3:#8896a6;--primary:#2563eb;--primary2:#1d4ed8;--primary-glow:rgba(37,99,235,.08);--success:#059669;--success-glow:rgba(5,150,105,.08);--danger:#dc2626;--danger-glow:rgba(220,38,38,.08);--warning:#d97706;--warning-glow:rgba(217,119,6,.08);--purple:#7c3aed;--purple-glow:rgba(124,58,237,.08);--cyan:#0891b2;--cyan-glow:rgba(8,145,178,.08);--gold:#ca8a04;--silver:#64748b;--bronze:#b45309;--review:#7c3aed;--review-glow:rgba(124,58,237,.12);--radius:12px;--radius-sm:8px;--radius-xs:6px;--shadow-sm:0 1px 3px rgba(0,0,0,.06),0 1px 2px rgba(0,0,0,.04);--shadow:0 4px 16px rgba(0,0,0,.06);--shadow-lg:0 8px 30px rgba(0,0,0,.08)}
*{margin:0;padding:0;box-sizing:border-box}body{font-family:'Outfit',sans-serif;background:var(--bg);color:var(--text);min-height:100vh}a{color:var(--primary);text-decoration:none}
.topbar{background:var(--bg2);border-bottom:1px solid var(--border);padding:0 24px;height:64px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:100;box-shadow:var(--shadow-sm)}.topbar-brand{font-size:20px;font-weight:700;color:var(--primary)}.topbar-right{display:flex;align-items:center;gap:16px}.topbar-user{display:flex;align-items:center;gap:8px;color:var(--text2);font-size:14px;font-weight:500}.avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--purple));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:600;font-size:14px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border-radius:var(--radius-sm);font-family:inherit;font-size:14px;font-weight:600;border:none;cursor:pointer;transition:all .2s;text-decoration:none}.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow)}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary2)}.btn-secondary{background:var(--bg2);color:var(--text);border:1px solid var(--border2)}.btn-secondary:hover{background:var(--bg3)}.btn-danger{background:var(--danger);color:#fff}.btn-success{background:var(--success);color:#fff}.btn-review{background:var(--review);color:#fff}.btn-ghost{background:transparent;color:var(--text2);padding:8px 12px}.btn-ghost:hover{color:var(--text);background:var(--surface)}.btn-sm{padding:7px 14px;font-size:13px}.btn-lg{padding:14px 28px;font-size:16px;border-radius:var(--radius)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#eef2ff 0%,#f0f4f8 50%,#ecfdf5 100%);padding:20px}.login-card{background:var(--bg2);border:1px solid var(--border);border-radius:20px;padding:48px 40px;width:100%;max-width:420px;box-shadow:var(--shadow-lg)}.login-card h1{font-size:28px;font-weight:800;margin-bottom:6px;text-align:center;color:var(--primary)}.login-card .subtitle{text-align:center;color:var(--text2);margin-bottom:32px;font-size:14px}.logo-icon{width:64px;height:64px;margin:0 auto 20px;border-radius:16px;background:linear-gradient(135deg,var(--primary),#6366f1);display:flex;align-items:center;justify-content:center;color:#fff;font-size:28px;box-shadow:0 4px 14px rgba(37,99,235,.25)}
.input-group{margin-bottom:20px}.input-group label{display:block;font-size:13px;font-weight:600;color:var(--text2);margin-bottom:6px}.input-wrap{display:flex;align-items:center;gap:10px;background:var(--bg3);border:1.5px solid var(--border);border-radius:var(--radius-sm);padding:0 14px;transition:all .2s}.input-wrap:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-glow);background:#fff}.input-wrap input,.input-wrap select{flex:1;background:none;border:none;color:var(--text);font-family:inherit;font-size:15px;padding:12px 0;outline:none}.input-wrap input::placeholder{color:var(--text3)}.input-wrap .icon{color:var(--text3);font-size:18px}.error-msg{color:var(--danger);font-size:13px;margin-bottom:16px;padding:10px 16px;background:var(--danger-glow);border-radius:var(--radius-xs);border:1px solid rgba(220,38,38,.15)}.success-msg{color:var(--success);font-size:13px;margin-bottom:16px;padding:10px 16px;background:var(--success-glow);border-radius:var(--radius-xs);border:1px solid rgba(5,150,105,.15)}
.main{flex:1;padding:24px;max-width:1200px;margin:0 auto;width:100%}
.stats-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:32px}.stat-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:20px;display:flex;align-items:center;gap:16px;box-shadow:var(--shadow-sm)}.stat-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:22px}.stat-icon.blue{background:var(--primary-glow);color:var(--primary)}.stat-icon.green{background:var(--success-glow);color:var(--success)}.stat-icon.purple{background:var(--purple-glow);color:var(--purple)}.stat-icon.orange{background:var(--warning-glow);color:var(--warning)}.stat-icon.cyan{background:var(--cyan-glow);color:var(--cyan)}.stat-icon.red{background:var(--danger-glow);color:var(--danger)}.stat-value{font-size:24px;font-weight:700;color:var(--text)}.stat-label{font-size:12px;color:var(--text3);font-weight:500;text-transform:uppercase;letter-spacing:.5px}
.section-title{font-size:18px;font-weight:700;margin-bottom:16px;color:var(--text)}.quiz-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:16px;margin-bottom:32px}.quiz-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:24px;cursor:pointer;transition:all .25s;position:relative;overflow:hidden;display:block;color:var(--text);box-shadow:var(--shadow-sm)}.quiz-card:hover{border-color:var(--primary);transform:translateY(-3px);box-shadow:0 8px 25px rgba(37,99,235,.12)}.badge{display:inline-block;padding:4px 10px;border-radius:20px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;margin-bottom:12px}.badge-gk{background:var(--primary-glow);color:var(--primary)}.badge-math{background:var(--success-glow);color:var(--success)}.badge-english{background:var(--purple-glow);color:var(--purple)}.badge-science{background:var(--warning-glow);color:var(--warning)}.badge-default{background:var(--surface);color:var(--text2)}.quiz-card h3{font-size:17px;font-weight:700;margin-bottom:8px;color:var(--text)}.quiz-card .desc{font-size:13px;color:var(--text2);margin-bottom:16px;line-height:1.5}.quiz-card .meta{display:flex;align-items:center;gap:16px;font-size:12px;color:var(--text3)}.completed-tag{position:absolute;top:16px;right:16px;background:var(--success-glow);color:var(--success);padding:4px 10px;border-radius:20px;font-size:11px;font-weight:600;border:1px solid rgba(5,150,105,.15)}
.quiz-page{max-width:920px;margin:0 auto}.quiz-topbar{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:16px 24px;display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;flex-wrap:wrap;gap:12px;box-shadow:var(--shadow-sm)}.quiz-title-bar h2{font-size:18px;font-weight:700;color:var(--text)}.quiz-title-bar .sub{font-size:13px;color:var(--text2)}.timer-display{display:flex;align-items:center;gap:8px;font-family:'JetBrains Mono',monospace;font-size:20px;font-weight:600;padding:8px 16px;border-radius:var(--radius-sm)}.timer-ok{background:var(--success-glow);color:var(--success);border:1px solid rgba(5,150,105,.2)}.timer-warn{background:var(--warning-glow);color:var(--warning);border:1px solid rgba(217,119,6,.2)}.timer-danger{background:var(--danger-glow);color:var(--danger);border:1px solid rgba(220,38,38,.2);animation:pulse 1s infinite}@keyframes pulse{0%,100%{opacity:1}50%{opacity:.6}}
.quiz-body{display:flex;gap:20px}.quiz-main{flex:1}.quiz-sidebar{width:270px;flex-shrink:0;background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:20px;position:sticky;top:84px;height:fit-content;box-shadow:var(--shadow-sm)}.quiz-sidebar h4{font-size:14px;font-weight:600;color:var(--text2);margin-bottom:12px}.q-palette{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin-bottom:16px}.q-num{width:100%;aspect-ratio:1;border-radius:var(--radius-xs);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;cursor:pointer;border:2px solid var(--border);background:var(--bg2);color:var(--text3);transition:all .15s;text-decoration:none}.q-num:hover{border-color:var(--primary);color:var(--primary)}.q-num.current{border-color:var(--primary);background:var(--primary);color:#fff;box-shadow:0 2px 8px rgba(37,99,235,.3)}.q-num.answered{border-color:var(--success);background:var(--success-glow);color:var(--success)}.q-num.marked{border-color:var(--review);background:var(--review-glow);color:var(--review)}.q-num.marked.answered{border-color:var(--review);background:var(--review-glow);color:var(--review);position:relative}.q-num.marked.answered::after{content:'';position:absolute;bottom:2px;right:2px;width:7px;height:7px;border-radius:50%;background:var(--success)}
.q-legend{display:flex;flex-wrap:wrap;gap:10px;font-size:11px;color:var(--text3)}.q-legend span{display:flex;align-items:center;gap:4px}.legend-dot{display:inline-block;width:12px;height:12px;border-radius:3px;margin-right:2px;border:2px solid transparent}.legend-dot.dot-current{background:var(--primary)}.legend-dot.dot-answered{background:var(--success-glow);border-color:var(--success)}.legend-dot.dot-review{background:var(--review-glow);border-color:var(--review)}.legend-dot.dot-notvisited{background:var(--bg2);border-color:var(--border)}
.question-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:28px;margin-bottom:20px;box-shadow:var(--shadow-sm)}.question-number{display:inline-flex;align-items:center;justify-content:center;min-width:36px;height:36px;padding:0 12px;background:var(--primary);color:#fff;border-radius:8px;font-size:14px;font-weight:700}.question-text{font-size:16px;line-height:1.7;margin:16px 0 24px;color:var(--text)}.options-list{display:flex;flex-direction:column;gap:10px}.option-btn{display:flex;align-items:center;gap:14px;padding:14px 18px;border-radius:var(--radius-sm);border:2px solid var(--border);background:var(--bg2);cursor:pointer;transition:all .2s;text-align:left;font-family:inherit;font-size:14px;color:var(--text);width:100%}.option-btn:hover{border-color:var(--primary);background:var(--primary-glow)}.option-btn.selected{border-color:var(--primary);background:var(--primary-glow)}.option-btn input[type="radio"]{display:none}.opt-letter{width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;flex-shrink:0;background:var(--surface);color:var(--text2);transition:all .2s;border:1px solid var(--border)}.option-btn.selected .opt-letter{background:var(--primary);color:#fff;border-color:var(--primary)}.quiz-nav{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.result-page{max-width:800px;margin:0 auto}.result-header{text-align:center;padding:40px 20px;margin-bottom:24px;background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm)}.score-circle{width:140px;height:140px;border-radius:50%;margin:0 auto 20px;display:flex;align-items:center;justify-content:center;position:relative}.score-circle::before{content:'';position:absolute;inset:-4px;border-radius:50%;background:conic-gradient(var(--primary) var(--pct),var(--border) var(--pct));z-index:0}.score-circle .inner{position:relative;z-index:1;width:calc(100% - 8px);height:calc(100% - 8px);border-radius:50%;background:var(--bg2);display:flex;flex-direction:column;align-items:center;justify-content:center}.score-circle .inner .big{font-size:32px;font-weight:800;color:var(--text)}.score-circle .inner .pct{font-size:14px;color:var(--text2)}.result-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin-bottom:24px}.r-stat{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px;text-align:center;box-shadow:var(--shadow-sm)}.r-stat .val{font-size:22px;font-weight:700}.r-stat .lbl{font-size:12px;color:var(--text2);margin-top:2px}
.chart-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:24px;box-shadow:var(--shadow-sm)}.chart-card h3{font-size:16px;font-weight:700;margin-bottom:20px;color:var(--text)}.bar-chart{display:flex;align-items:flex-end;gap:32px;justify-content:center;padding:20px 0;height:220px}.bar-item{display:flex;flex-direction:column;align-items:center;gap:8px;justify-content:flex-end;height:100%}.bar-fill{width:64px;border-radius:8px 8px 0 0;transition:height .5s;position:relative;min-height:4px}.bar-val{position:absolute;top:-26px;left:50%;transform:translateX(-50%);font-size:14px;font-weight:700;white-space:nowrap}.bar-label{font-size:12px;color:var(--text2);font-weight:500;text-align:center}
.leaderboard-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:24px;box-shadow:var(--shadow-sm)}.leaderboard-card h3{font-size:16px;font-weight:700;margin-bottom:16px}.lb-table{width:100%;border-collapse:separate;border-spacing:0 6px}.lb-table th{text-align:left;font-size:11px;color:var(--text3);text-transform:uppercase;letter-spacing:.5px;padding:0 12px 8px;font-weight:600}.lb-table td{padding:10px 12px}.lb-row{background:var(--bg3)}.lb-row td:first-child{border-radius:var(--radius-sm) 0 0 var(--radius-sm)}.lb-row td:last-child{border-radius:0 var(--radius-sm) var(--radius-sm) 0}.lb-row.you{background:var(--primary-glow)}.rank-num{font-weight:700;font-size:15px;text-align:center;color:var(--text)}.lb-name{font-weight:600;font-size:14px;color:var(--text)}.lb-score{font-family:'JetBrains Mono',monospace;font-weight:600;color:var(--primary)}
.review-q{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:12px;box-shadow:var(--shadow-sm)}.rq-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}.rq-num{width:30px;height:30px;border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;color:#fff;flex-shrink:0}.rq-num.correct{background:var(--success)}.rq-num.wrong{background:var(--danger)}.rq-num.skip{background:var(--text3)}.rev-opt{padding:10px 14px;border-radius:var(--radius-xs);font-size:13px;display:flex;align-items:center;gap:10px;border:1px solid var(--border);background:var(--bg3);margin-bottom:6px}.rev-opt.is-correct{border-color:var(--success);background:var(--success-glow)}.rev-opt.is-wrong{border-color:var(--danger);background:var(--danger-glow)}
.admin-tabs{display:flex;gap:8px;margin-bottom:24px;flex-wrap:wrap}.admin-tab{padding:10px 20px;border-radius:var(--radius-sm);font-size:14px;font-weight:600;border:1px solid var(--border);background:var(--bg2);color:var(--text2);transition:all .2s;text-decoration:none;display:inline-flex;align-items:center;gap:6px}.admin-tab.active,.admin-tab:hover{border-color:var(--primary);background:var(--primary-glow);color:var(--primary)}.form-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:28px;margin-bottom:20px;box-shadow:var(--shadow-sm)}.form-card h3{font-size:17px;font-weight:700;margin-bottom:20px;color:var(--text)}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}.form-field{margin-bottom:16px}.form-field label{display:block;font-size:13px;font-weight:600;color:var(--text2);margin-bottom:6px}.form-field input,.form-field select,.form-field textarea{width:100%;padding:10px 14px;border-radius:var(--radius-xs);border:1.5px solid var(--border);background:var(--bg3);color:var(--text);font-family:inherit;font-size:14px;outline:none;transition:all .2s}.form-field input:focus,.form-field select:focus,.form-field textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-glow);background:#fff}.form-field textarea{resize:vertical;min-height:80px}
.results-table{width:100%;border-collapse:separate;border-spacing:0}.results-table th{text-align:left;padding:10px 14px;font-size:11px;text-transform:uppercase;letter-spacing:.5px;color:var(--text3);font-weight:600;border-bottom:2px solid var(--border);background:var(--bg3)}.results-table td{padding:10px 14px;font-size:13px;border-bottom:1px solid var(--border)}.results-table tr:hover td{background:var(--bg3)}
.pct-badge{display:inline-block;padding:3px 10px;border-radius:12px;font-size:12px;font-weight:600}.pct-high{background:var(--success-glow);color:var(--success);border:1px solid rgba(5,150,105,.15)}.pct-mid{background:var(--warning-glow);color:var(--warning);border:1px solid rgba(217,119,6,.15)}.pct-low{background:var(--danger-glow);color:var(--danger);border:1px solid rgba(220,38,38,.15)}
.mini-bar-row{display:flex;align-items:center;gap:10px;margin-bottom:10px}.mini-bar-label{font-size:12px;color:var(--text2);width:100px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex-shrink:0}.mini-bar-track{flex:1;height:8px;background:var(--surface);border-radius:4px;overflow:hidden}.mini-bar-fill{height:100%;border-radius:4px}.mini-bar-val{font-size:12px;font-weight:600;width:40px;text-align:right}
.excel-upload-area{border:2px dashed var(--border);border-radius:var(--radius);padding:40px 20px;text-align:center;background:var(--bg3);cursor:pointer;transition:border-color .2s}.excel-upload-area:hover{border-color:var(--primary)}.excel-upload-area p{color:var(--text2);font-size:14px;margin-top:10px}.format-hint{margin-top:16px;padding:12px 16px;background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius-xs);text-align:left;font-size:12px;color:var(--text3);line-height:1.8;font-family:'JetBrains Mono',monospace}.download-box{background:var(--primary-glow);border:1px solid rgba(37,99,235,.2);border-radius:var(--radius-sm);padding:16px;margin-bottom:24px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.3);display:flex;align-items:center;justify-content:center;z-index:999;backdrop-filter:blur(4px);padding:20px}.modal-box{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:32px;max-width:440px;width:100%;text-align:center;box-shadow:var(--shadow-lg)}.modal-box h3{font-size:18px;font-weight:700;margin-bottom:8px;color:var(--text)}.modal-box p{color:var(--text2);font-size:14px;margin-bottom:24px;line-height:1.6}
@media(max-width:768px){.quiz-body{flex-direction:column-reverse}.quiz-sidebar{width:100%;position:static}.form-row{grid-template-columns:1fr}.quiz-grid{grid-template-columns:1fr}.stats-row{grid-template-columns:repeat(2,1fr)}.login-card{padding:32px 24px}.topbar{padding:0 16px}.main{padding:16px}.bar-chart{gap:16px}.bar-fill{width:48px}.download-box{flex-direction:column;text-align:center}}