:root{--bg:#f4f7fb;--card:#fff;--text:#182230;--muted:#667085;--primary:#0b5ed7;--primary-dark:#084aa9;--border:#d9e2ef;--success:#16794a;--danger:#b42318;--warning:#b54708;--shadow:0 10px 30px rgba(31,54,88,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:"Roboto",Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.55}.topbar{position:sticky;top:0;z-index:20;display:flex;justify-content:space-between;align-items:center;padding:14px clamp(18px,4vw,56px);background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}.brand{display:flex;gap:12px;align-items:center}.brand h1{margin:0;font-size:clamp(18px,2.2vw,26px)}.brand p{margin:0;color:var(--muted);font-size:14px}.logo{width:46px;height:46px;display:grid;place-items:center;border-radius:14px;background:#e9f2ff;font-size:25px}.container{max-width:1180px;margin:auto;padding:28px 18px 64px}.card{background:var(--card);border:1px solid var(--border);border-radius:20px;box-shadow:var(--shadow)}.hero{display:grid;grid-template-columns:1.5fr .8fr;gap:30px;padding:36px}.hero h2{font-size:clamp(30px,4vw,48px);line-height:1.1;margin:14px 0}.hero p{color:var(--muted);max-width:720px}.badge,.eyebrow{display:inline-block;font-size:12px;font-weight:800;letter-spacing:.08em;color:var(--primary);text-transform:uppercase}.hero-actions,.form-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}.btn{border:0;border-radius:12px;padding:11px 17px;font-weight:700;cursor:pointer;font-size:15px}.btn.primary{background:var(--primary);color:#fff}.btn.primary:hover{background:var(--primary-dark)}.btn.secondary{background:#eaf2ff;color:var(--primary)}.btn.ghost{background:transparent;border:1px solid var(--border);color:var(--text)}.scorebox{display:flex;align-items:center;justify-content:center;gap:18px;padding:24px;border-radius:18px;background:linear-gradient(135deg,#eef5ff,#f8fbff)}.score-ring{width:120px;height:120px;border:12px solid #cfe2ff;border-top-color:var(--primary);border-radius:50%;display:grid;place-items:center;align-content:center}.score-ring span{font-size:38px;font-weight:800;line-height:1}.score-ring small{color:var(--muted)}section{margin-top:34px}.section-title{display:flex;justify-content:space-between;align-items:end;gap:20px;margin:0 4px 18px}.section-title.compact{margin:0 0 18px}.section-title h2{margin:4px 0 0;font-size:clamp(24px,3vw,34px)}.progress-wrap{display:flex;gap:10px;align-items:center;min-width:260px}.progress{height:10px;background:#e6ebf2;border-radius:999px;overflow:hidden;flex:1}.progress div{height:100%;width:0;background:var(--primary);transition:.3s}.scenario-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.scenario{padding:24px}.scenario.wide{grid-column:1/-1}.scenario-head{display:flex;gap:14px;align-items:center;margin-bottom:18px}.scenario-head h3{margin:0;font-size:22px}.scenario-head p{margin:2px 0 0;color:var(--muted)}.number{width:46px;height:46px;display:grid;place-items:center;background:#eaf2ff;color:var(--primary);font-weight:900;border-radius:14px}.mock-email,.call-box{border:1px solid var(--border);background:#f8fafc;border-radius:14px;padding:16px}.mock-email p{margin:12px 0}.attachment{display:inline-block;background:#fff0f0;color:var(--danger);padding:8px 10px;border-radius:8px;font-weight:700}.question{font-weight:700;margin-top:18px}.scenario label,.radio-list label{display:block;padding:9px 0}.scenario input{margin-right:8px}.feedback{margin-top:14px;padding:0;border-radius:12px}.feedback.show{padding:12px 14px}.feedback.success{background:#ecfdf3;color:var(--success)}.feedback.error{background:#fef3f2;color:var(--danger)}.url-list{display:grid;gap:10px}.url-option{text-align:left;padding:13px;border:1px solid var(--border);border-radius:10px;background:#f8fafc;cursor:pointer}.url-option.selected{border-color:var(--primary);background:#eaf2ff}.order-list{display:grid;gap:10px}.order-item{padding:12px 14px;border:1px solid var(--border);border-radius:10px;background:#f8fafc;cursor:grab}.order-item.dragging{opacity:.45}.hint{font-size:13px;color:var(--muted)}.call-box{display:flex;gap:14px;align-items:center}.avatar{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;background:#fff0f0;color:var(--danger);font-size:24px}.guide,.report-section{padding:30px}.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}.step{border:1px solid var(--border);border-radius:14px;padding:16px;background:#fbfcfe}.step span{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--primary);color:#fff;font-weight:800}.step h3{margin:10px 0 6px}.step p{margin:0;color:var(--muted);font-size:14px}.report-form{display:grid;grid-template-columns:1fr 1fr;gap:16px}.report-form label{font-weight:700}.report-form input,.report-form textarea{width:100%;margin-top:7px;border:1px solid var(--border);border-radius:10px;padding:11px;font:inherit}.full{grid-column:1/-1}.report-output{white-space:pre-wrap;background:#101828;color:#f2f4f7;border-radius:14px;padding:18px;min-height:160px;overflow:auto}footer{text-align:center;color:var(--muted);padding:28px 18px 44px}@media(max-width:850px){.hero{grid-template-columns:1fr}.scenario-grid{grid-template-columns:1fr}.scenario.wide{grid-column:auto}.steps{grid-template-columns:1fr 1fr}.topbar{align-items:flex-start}.brand p{display:none}}@media(max-width:580px){.hero,.scenario,.guide,.report-section{padding:20px}.steps,.report-form{grid-template-columns:1fr}.full{grid-column:auto}.section-title{align-items:flex-start;flex-direction:column}.progress-wrap{width:100%;min-width:0}.topbar{gap:10px}.btn.ghost{padding:9px 11px;font-size:13px}.scorebox{flex-direction:column}.hero h2{font-size:34px}}


/* Mô phỏng mở tệp nghi ngờ */
.section-lead{margin:8px 0 0;color:var(--muted);max-width:760px}.simulator-section{padding:30px;overflow:hidden}.safe-chip{align-self:flex-start;background:#ecfdf3;color:var(--success);border:1px solid #abefc6;padding:7px 11px;border-radius:999px;font-size:13px;font-weight:800;white-space:nowrap}.sim-layout{display:grid;grid-template-columns:.9fr 1.45fr;gap:20px;align-items:stretch}.sim-brief{display:grid;gap:16px}.sim-mail{height:max-content}.attachment-button{border:0;cursor:pointer;font:inherit}.attachment-button:hover{filter:brightness(.97);transform:translateY(-1px)}.sim-instructions{border:1px solid var(--border);border-radius:14px;padding:18px;background:#fbfcfe}.sim-instructions h3{margin:0 0 8px}.fake-monitor{border:10px solid #253244;border-bottom-width:18px;border-radius:16px;background:#253244;box-shadow:0 16px 30px rgba(16,24,40,.18)}.monitor-bar{display:flex;justify-content:space-between;color:#d0d5dd;font-size:12px;padding:0 4px 8px}.fake-desktop{position:relative;min-height:390px;overflow:hidden;border-radius:5px;background:linear-gradient(135deg,#0c6aa6,#143f70 55%,#1d2939);color:#fff}.desktop-icons{position:absolute;top:18px;left:16px;display:grid;gap:20px}.desktop-icons div{display:grid;justify-items:center;font-size:29px;text-shadow:0 1px 3px #000}.desktop-icons small{font-size:11px}.welcome-panel,.loading-panel{position:absolute;left:50%;top:44%;transform:translate(-50%,-50%);width:min(330px,75%);background:rgba(255,255,255,.96);color:#182230;padding:24px;border-radius:12px;text-align:center;box-shadow:0 12px 30px rgba(0,0,0,.28)}.welcome-panel p,.loading-panel small{display:block;color:#667085;margin:6px 0 0}.spinner{width:38px;height:38px;margin:0 auto 12px;border:5px solid #d0d5dd;border-top-color:#0b5ed7;border-radius:50%;animation:spin .8s linear infinite}.taskbar{position:absolute;bottom:0;left:0;right:0;height:42px;background:rgba(16,24,40,.9);display:flex;align-items:center;gap:15px;padding:0 14px}.taskbar-right{margin-left:auto;font-size:12px}.popup-stack{position:absolute;right:14px;bottom:54px;width:min(325px,78%);display:grid;gap:8px}.fake-popup{background:#fff;color:#182230;border-left:5px solid var(--danger);border-radius:8px;padding:11px 13px;box-shadow:0 9px 24px rgba(0,0,0,.3);animation:popIn .25s ease}.fake-popup strong{display:block}.fake-popup small{color:#667085}.hidden{display:none!important}.symptoms-panel{margin-top:20px;border:1px solid #fecdca;background:#fffafa;border-radius:16px;padding:18px}.symptom-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}.pulse-dot{display:inline-block;width:10px;height:10px;border-radius:50%;background:#f04438;box-shadow:0 0 0 0 rgba(240,68,56,.6);animation:pulse 1.3s infinite}.meter-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.meter-card{border:1px solid var(--border);background:#fff;border-radius:12px;padding:13px}.meter-card span{color:var(--muted);font-size:13px}.meter-card strong{float:right}.meter{clear:both;height:8px;background:#eaecf0;border-radius:999px;overflow:hidden;margin-top:11px}.meter i{display:block;height:100%;width:10%;background:#f04438;transition:width .5s ease}.process-box{margin-top:14px;background:#fff;border:1px solid var(--border);border-radius:12px;overflow:auto}.process-title{display:flex;justify-content:space-between;padding:12px 14px;border-bottom:1px solid var(--border)}.process-title span{color:var(--muted);font-size:13px}.process-box table{width:100%;border-collapse:collapse;min-width:550px}.process-box th,.process-box td{text-align:left;padding:10px 14px;border-bottom:1px solid #eef2f6;font-size:13px}.process-box tr.suspicious{background:#fff1f0;color:#912018}.response-challenge{margin-top:20px;border-top:1px solid var(--border);padding-top:20px}.response-challenge h3{margin-top:0}.action-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.sim-action{border:1px solid var(--border);background:#f8fafc;border-radius:12px;padding:14px;text-align:left;font-weight:700;cursor:pointer}.sim-action:hover{border-color:var(--primary);background:#eef5ff}.sim-action:disabled{cursor:not-allowed;opacity:.65}.next-steps{margin-top:14px;border-radius:12px;background:#ecfdf3;color:#14532d;padding:14px 18px}.next-steps h4{margin:0 0 6px}.next-steps ol{margin:0;padding-left:20px}@keyframes spin{to{transform:rotate(360deg)}}@keyframes popIn{from{opacity:0;transform:translateY(8px) scale(.98)}to{opacity:1;transform:none}}@keyframes pulse{70%{box-shadow:0 0 0 8px rgba(240,68,56,0)}}@media(max-width:900px){.sim-layout{grid-template-columns:1fr}.fake-desktop{min-height:360px}}@media(max-width:580px){.simulator-section{padding:20px}.meter-grid,.action-grid{grid-template-columns:1fr}.safe-chip{white-space:normal}.fake-desktop{min-height:330px}}

/* Phòng lab điều tra và quét mã độc giả lập */
.forensic-lab{margin-top:22px;padding-top:22px;border-top:1px solid var(--border)}.lab-heading{display:flex;justify-content:space-between;gap:18px;align-items:flex-start}.lab-heading h3{font-size:25px;margin:4px 0}.lab-heading p{color:var(--muted);margin:0;max-width:760px}.lab-progress{height:8px;background:#e4e7ec;border-radius:999px;overflow:hidden;margin:18px 0}.lab-progress div{height:100%;width:0;background:var(--primary);transition:width .35s}.lab-grid{display:grid;grid-template-columns:.8fr 1.35fr;gap:16px}.command-panel{display:grid;gap:9px}.command-step{padding:12px 14px;border:1px solid var(--border);border-radius:11px;background:#fff;text-align:left;cursor:pointer}.command-step:hover:not(:disabled){border-color:var(--primary);background:#f0f6ff}.command-step b{display:block;color:var(--text)}.command-step code{display:block;margin-top:3px;color:#475467;font-size:12px;white-space:normal}.command-step.done{border-color:#75e0a7;background:#ecfdf3}.command-step:disabled{opacity:.48;cursor:not-allowed}.terminal-wrap{border-radius:13px;overflow:hidden;border:1px solid #344054;background:#07101d;min-height:440px}.terminal-title{display:flex;justify-content:space-between;align-items:center;background:#1d2939;color:#eaecf0;padding:9px 12px;font-size:12px}.terminal-title button{border:0;background:#344054;color:#fff;border-radius:6px;padding:5px 8px;cursor:pointer}.terminal-output{margin:0;padding:16px;color:#b9f6ca;background:#07101d;min-height:400px;max-height:520px;overflow:auto;white-space:pre-wrap;font:13px/1.55 "Roboto",Arial,sans-serif}.scan-panel{margin-top:16px;border:1px solid #b2ccff;background:#eff4ff;border-radius:13px;padding:15px}.scan-status{display:flex;justify-content:space-between}.scan-track{height:10px;background:#d1e0ff;border-radius:999px;overflow:hidden;margin:10px 0}.scan-track div{height:100%;width:0;background:var(--primary);transition:width .25s}.scan-panel p{margin:0;color:#475467}.lab-conclusion{margin-top:16px;border:1px solid #75e0a7;background:#ecfdf3;border-radius:14px;padding:18px}.lab-conclusion h4{font-size:20px;margin:0 0 12px}.finding-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.finding-grid div{background:#fff;border:1px solid #abefc6;border-radius:10px;padding:11px}.finding-grid span{display:block;color:#667085;font-size:12px}.finding-grid strong{display:block;margin-top:3px;overflow-wrap:anywhere}.lab-conclusion p{margin:14px 0}.terminal-alert{color:#ffb4ab}.terminal-ok{color:#b9f6ca}.terminal-warn{color:#ffd791}@media(max-width:900px){.lab-grid{grid-template-columns:1fr}.finding-grid{grid-template-columns:1fr 1fr}}@media(max-width:580px){.lab-heading{display:block}.finding-grid{grid-template-columns:1fr}.terminal-wrap{min-height:390px}.terminal-output{min-height:350px}}

/* Diễn tập điều tra và gỡ mã độc theo lộ trình 7 bước */
.submission-brief{display:flex;justify-content:space-between;gap:18px;align-items:center;margin-top:18px;padding:16px 18px;border:1px solid #b2ccff;border-radius:14px;background:linear-gradient(135deg,#eff4ff,#f8fbff)}
.submission-brief p{margin:4px 0 0;color:var(--muted)}
.evidence-counter{flex:0 0 auto;width:104px;height:76px;border-radius:14px;background:#fff;border:1px solid #b2ccff;display:grid;place-items:center;align-content:center}
.evidence-counter span{font-size:28px;line-height:1;font-weight:900;color:var(--primary)}
.evidence-counter small{color:var(--muted);font-size:11px;margin-top:4px}
.lab-route{display:grid;grid-template-columns:repeat(7,1fr);gap:8px;margin:20px 0 14px}
.route-step{position:relative;border:1px solid var(--border);background:#f8fafc;border-radius:13px;padding:11px 8px;text-align:left;min-height:86px;cursor:pointer;transition:.2s}
.route-step span{display:grid;place-items:center;width:27px;height:27px;border-radius:50%;background:#e4e7ec;color:#475467;font-weight:900;margin-bottom:6px}
.route-step b,.route-step small{display:block}.route-step b{font-size:13px}.route-step small{font-size:10px;color:var(--muted);margin-top:2px}
.route-step.active{border-color:var(--primary);background:#eff4ff;box-shadow:0 0 0 2px rgba(11,94,215,.08)}.route-step.active span{background:var(--primary);color:#fff}
.route-step.done{border-color:#75e0a7;background:#ecfdf3}.route-step.done span{background:#16a34a;color:#fff}.route-step.done span:after{content:'✓'} .route-step.done span{font-size:0}.route-step.done span:after{font-size:14px}
.route-step:disabled{opacity:.52;cursor:not-allowed}
.case-status-bar{display:flex;flex-wrap:wrap;gap:8px 18px;padding:11px 14px;border-radius:11px;background:#101828;color:#d0d5dd;font-size:12px;margin-bottom:16px}.status-red{color:#fda29b;font-style:normal;font-weight:800}
.lab-stage{border:1px solid var(--border);border-radius:16px;background:#fff;padding:20px;margin-top:14px;box-shadow:0 8px 20px rgba(31,54,88,.05)}
.stage-head{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:16px;border-bottom:1px solid #eef2f6;padding-bottom:14px}
.stage-head>div{display:flex;align-items:center;gap:12px}.stage-head h4{margin:0;font-size:22px}.stage-number{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;background:#eaf2ff;color:var(--primary);font-weight:900}
.stage-goal{font-size:12px;font-weight:800;color:var(--primary);background:#eff4ff;border:1px solid #b2ccff;padding:6px 10px;border-radius:999px;white-space:nowrap}
.two-col-lab{display:grid;grid-template-columns:1.3fr .8fr;gap:16px}.process-layout{grid-template-columns:1.15fr .85fr}
.tool-window{border:1px solid #b8c5d6;border-radius:11px;overflow:hidden;background:#fff;box-shadow:0 8px 18px rgba(16,24,40,.08)}
.tool-title{display:flex;justify-content:space-between;gap:12px;align-items:center;background:#1d2939;color:#fff;padding:9px 12px;font:12px/1.3 "Roboto",Arial,sans-serif}.tool-title span:last-child{color:#d0d5dd}
.tool-body{padding:15px}.form-sim{display:grid;grid-template-columns:1fr 1fr;gap:12px}.form-sim label{font-size:12px;font-weight:800}.form-sim input,.form-sim textarea{width:100%;border:1px solid var(--border);border-radius:8px;padding:9px;margin-top:5px;background:#f8fafc;font:13px inherit;color:#344054}.form-sim textarea{resize:none}.form-sim .full{grid-column:1/-1}
.stage-actions-card{border:1px solid var(--border);border-radius:12px;padding:16px;background:#fbfcfe}.stage-actions-card h5,.behavior-card h5,.remediation-status h5{margin:0 0 12px;font-size:17px}.lab-action{width:100%;padding:11px 12px;margin-bottom:9px;border:1px solid var(--border);border-radius:9px;background:#fff;text-align:left;font-weight:800;cursor:pointer}.lab-action:hover:not(:disabled){border-color:var(--primary);background:#eff4ff}.lab-action:disabled{opacity:.48;cursor:not-allowed}.lab-action.done{border-color:#75e0a7;background:#ecfdf3;color:#166534}
.mini-feedback{font-size:12px;color:var(--muted);padding:9px 10px;background:#f2f4f7;border-radius:8px}.mini-feedback.success{background:#ecfdf3;color:#166534}
.fake-screenshot{margin-top:10px;border:8px solid #344054;border-bottom-width:13px;border-radius:8px;background:linear-gradient(135deg,#0c6aa6,#1d2939);color:#fff;min-height:120px;padding:14px;display:grid;align-content:center;gap:6px;text-align:center}.fake-screenshot span,.fake-screenshot small{font-size:10px;color:#d0d5dd}.fake-screenshot b{font-size:13px}
.principle-warning{margin-top:14px;border:1px solid #fda29b;background:#fff5f4;color:#912018;border-radius:11px;padding:11px 13px}
.tool-tabs{display:flex;gap:0;background:#eef2f6;border-bottom:1px solid #b8c5d6;overflow:auto}.tool-tabs button{border:0;border-right:1px solid #d0d5dd;background:transparent;padding:9px 13px;font-weight:700;cursor:pointer;white-space:nowrap}.tool-tabs button.active{background:#fff;color:var(--primary);box-shadow:inset 0 3px 0 var(--primary)}.mini-tabs button{padding:7px 12px;font-size:12px}
.tool-table-wrap{overflow:auto;max-height:310px}.tool-table{width:100%;border-collapse:collapse;min-width:720px;font:12px/1.35 "Roboto",Arial,sans-serif}.tool-table th{position:sticky;top:0;background:#f2f4f7;color:#344054;text-align:left;padding:8px 10px;border-bottom:1px solid #d0d5dd}.tool-table td{padding:8px 10px;border-bottom:1px solid #eef2f6}.tool-table tbody tr{cursor:pointer}.tool-table tbody tr:hover{background:#eff4ff}.tool-table tbody tr.selected{background:#dbeafe;outline:1px solid #84adff}.tool-table tbody tr.suspicious-row,.process-table tr.process-suspect{background:#fff3f2}.tool-table tbody tr.suspicious-row:hover,.process-table tr.process-suspect:hover{background:#fee4e2}
.detail-panel{min-height:76px;padding:12px 14px;background:#fbfcfe;border-top:1px solid var(--border);font-size:13px}.detail-grid{display:grid;grid-template-columns:auto 1fr;gap:5px 12px}.detail-grid b{color:#475467}.danger-text{color:#b42318;font-weight:800}.safe-text{color:#16794a;font-weight:800}
.stage-footer-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:14px}.inline-feedback{font-size:13px;color:var(--muted)}.inline-feedback.success{color:#16794a;font-weight:800}.inline-feedback.error{color:#b42318;font-weight:800}
.tool-hint{margin:8px 12px 12px;color:var(--muted);font-size:12px}.properties-window{display:flex;flex-direction:column}.properties-body{padding:14px;min-height:230px;flex:1}.properties-window .btn{margin:0 14px 14px}.muted-box{color:var(--muted);background:#fbfcfe}.property-list{display:grid;gap:8px}.property-list div{display:grid;grid-template-columns:112px 1fr;gap:8px;padding-bottom:6px;border-bottom:1px solid #eef2f6}.property-list b{color:#475467;font-size:12px}.property-list span,.property-list code{font-size:12px;overflow-wrap:anywhere}
.analysis-command-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.analysis-command{border:1px solid var(--border);border-radius:12px;background:#fbfcfe;padding:12px;text-align:left;cursor:pointer}.analysis-command:hover:not(:disabled){border-color:var(--primary);background:#eff4ff}.analysis-command span{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:#eaf2ff;color:var(--primary);font-weight:900;margin-bottom:7px}.analysis-command b,.analysis-command code{display:block}.analysis-command code{font-size:10px;color:var(--muted);margin-top:3px;white-space:normal}.analysis-command.done{border-color:#75e0a7;background:#ecfdf3}.analysis-command.done span{background:#16a34a;color:#fff}.analysis-command:disabled{opacity:.58}
.analysis-terminal-wrap{margin:14px 0;min-height:310px}.analysis-terminal-wrap .terminal-output{min-height:270px;max-height:390px}.evidence-console{color:#d1fadf}
.behavior-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.behavior-card{border:1px solid var(--border);border-radius:13px;padding:16px;background:#fbfcfe}.behavior-card p{font-size:13px;color:var(--muted)}.behavior-card label{display:block;padding:5px 0;font-size:13px}.behavior-card select,.behavior-card textarea{width:100%;border:1px solid var(--border);border-radius:9px;padding:9px;font:inherit;background:#fff}.behavior-card textarea{resize:none}.task-command-preview{margin-top:12px;border:1px solid #fedf89;background:#fffaeb;border-radius:9px;padding:9px}.task-command-preview small,.task-command-preview code{display:block}.task-command-preview code{font-size:10px;overflow-wrap:anywhere;margin-top:4px}.decode-result{margin-top:10px;padding:10px;border-radius:8px;background:#f2f4f7;color:var(--muted);font-size:13px;overflow-wrap:anywhere}.decode-result.success{background:#ecfdf3;color:#166534;font-weight:800}
.remediation-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:16px}.remediation-sequence{display:grid;gap:9px}.remediation-sequence button{display:grid;grid-template-columns:34px 1fr;column-gap:10px;row-gap:2px;text-align:left;border:1px solid var(--border);background:#fff;border-radius:11px;padding:11px;cursor:pointer}.remediation-sequence button:hover:not(:disabled){border-color:var(--primary);background:#eff4ff}.remediation-sequence button>span{grid-row:1/3;display:grid;place-items:center;width:31px;height:31px;border-radius:50%;background:#eaf2ff;color:var(--primary);font-weight:900}.remediation-sequence button b{font-size:14px}.remediation-sequence button small{color:var(--muted)}.remediation-sequence button.done{border-color:#75e0a7;background:#ecfdf3}.remediation-sequence button.done>span{background:#16a34a;color:#fff}.remediation-sequence button:disabled{opacity:.45;cursor:not-allowed}
.remediation-status{border:1px solid #b2ccff;background:#f8fbff;border-radius:13px;padding:18px;text-align:center}.shield-visual{font-size:68px;filter:grayscale(.6);transition:.3s}.shield-visual.clean{filter:none;transform:scale(1.07)}.remediation-status p{color:var(--muted);font-size:13px}.recheck-panel{display:grid;gap:6px;text-align:left;margin-top:13px;padding:12px;background:#ecfdf3;color:#166534;border-radius:9px;font-size:12px}.recheck-panel b{font-size:13px}
.final-result{margin-top:18px;border:1px solid #75e0a7;background:#f0fdf4;border-radius:15px;padding:18px}.final-result-head{display:flex;justify-content:space-between;gap:16px;align-items:center}.final-result-head h4{margin:4px 0 0;font-size:22px}.completion-seal{border:2px solid #16a34a;color:#166534;padding:8px 12px;border-radius:8px;font-weight:900;transform:rotate(-2deg);white-space:nowrap}.result-table-wrap{overflow:auto;margin-top:15px}.result-table{width:100%;border-collapse:collapse;min-width:720px;background:#fff}.result-table th,.result-table td{border:1px solid #d1fadf;padding:9px 11px;text-align:left;font-size:13px}.result-table th{width:220px;background:#ecfdf3;color:#166534}.final-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.evidence-log{margin-top:16px;border:1px solid #344054;border-radius:12px;overflow:hidden;background:#101828;color:#d0d5dd}.evidence-log>div{display:flex;justify-content:space-between;gap:10px;background:#1d2939;padding:9px 12px}.evidence-log small{color:#98a2b3}.evidence-log ol{margin:0;padding:12px 12px 12px 34px;max-height:190px;overflow:auto;font:12px/1.55 "Roboto",Arial,sans-serif}.evidence-log li+li{margin-top:4px}
.seven-steps{grid-template-columns:repeat(7,1fr)}.seven-steps .step{padding:13px}.seven-steps .step h3{font-size:15px}.seven-steps .step p{font-size:12px}
@media(max-width:1050px){.lab-route{grid-template-columns:repeat(4,1fr)}.analysis-command-grid{grid-template-columns:repeat(2,1fr)}.behavior-grid{grid-template-columns:1fr}.seven-steps{grid-template-columns:repeat(4,1fr)}}
@media(max-width:820px){.two-col-lab,.process-layout,.remediation-layout{grid-template-columns:1fr}.lab-route{grid-template-columns:repeat(2,1fr)}.analysis-command-grid{grid-template-columns:1fr 1fr}.submission-brief{align-items:flex-start}.stage-head{align-items:flex-start}.stage-head>div{align-items:flex-start}.seven-steps{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.submission-brief{display:block}.evidence-counter{margin-top:12px}.lab-stage{padding:14px}.stage-head{display:block}.stage-head>div{margin-bottom:9px}.stage-goal{display:inline-block}.form-sim,.analysis-command-grid{grid-template-columns:1fr}.form-sim .full{grid-column:auto}.lab-route{grid-template-columns:1fr 1fr}.route-step{min-height:78px}.final-result-head{display:block}.completion-seal{display:inline-block;margin-top:12px}.seven-steps{grid-template-columns:1fr}.case-status-bar{display:grid}.process-table,.tool-table{min-width:660px}}
.prevention-box{margin-top:14px;border:1px solid #b7ebc6;background:#fff;border-radius:11px;padding:13px}.prevention-box>b{display:block;color:#166534;margin-bottom:8px}.prevention-box>div{display:flex;flex-wrap:wrap;gap:7px}.prevention-box span{font-size:12px;background:#ecfdf3;color:#166534;border:1px solid #abefc6;border-radius:999px;padding:5px 9px}

/* =========================================================
   Giao diện HDU và hệ thống thi
   ========================================================= */
:root{
  --hdu-blue:#004b87;
  --hdu-blue-deep:#003665;
  --hdu-blue-soft:#eaf3fb;
  --hdu-red:#c6202e;
  --hdu-gold:#f2b233;
  --hdu-ink:#13324c;
  --primary:var(--hdu-blue);
  --primary-dark:var(--hdu-blue-deep);
  --bg:#f1f5f9;
  --border:#d6e0ea;
  --shadow:0 12px 32px rgba(0,54,101,.09)
}
body{background:linear-gradient(180deg,#eef5fb 0,#f6f8fb 320px,#f4f6f8 100%);color:#182b3c}
a{color:inherit}.site-width{width:min(1240px,calc(100% - 36px));margin-inline:auto}.app-shell{min-height:100vh}.app-shell.hidden,.login-screen.hidden{display:none!important}

/* Logo chữ mô phỏng, không sử dụng tệp nhận diện chính thức */
.hdu-lockup{display:flex;align-items:center;gap:13px}.hdu-lockup>div:last-child{display:grid;gap:1px}.hdu-lockup b{font-family:"Roboto",Arial,sans-serif;font-size:19px;color:var(--hdu-blue-deep);letter-spacing:.02em}.hdu-lockup strong{font-size:11px;letter-spacing:.19em;color:#65788b}.hdu-mark{position:relative;width:66px;height:66px;border-radius:50%;display:grid;place-items:center;background:radial-gradient(circle at 45% 35%,#fff 0 18%,#f7c84b 19% 27%,#0b5a98 28% 100%);border:3px solid #fff;box-shadow:0 0 0 2px var(--hdu-blue),0 6px 14px rgba(0,54,101,.18);color:#fff}.hdu-mark:before,.hdu-mark:after{content:"";position:absolute;border-radius:50%;border:1px solid rgba(255,255,255,.5);inset:8px}.hdu-mark:after{inset:14px}.hdu-mark span{z-index:1;font:800 16px/1 "Roboto",Arial,sans-serif;letter-spacing:.04em}.hdu-mark small{z-index:1;font-size:7px;letter-spacing:.08em}.hdu-lockup.large .hdu-mark{width:82px;height:82px}.hdu-lockup.large b{font-size:22px}.hdu-lockup.large strong{font-size:12px}

/* Đăng nhập */
.login-screen{min-height:100vh;background:linear-gradient(120deg,rgba(0,54,101,.98),rgba(0,75,135,.92) 52%,rgba(9,91,145,.76)),radial-gradient(circle at 15% 25%,rgba(242,178,51,.22),transparent 34%);color:#fff;display:flex;flex-direction:column}.login-campus-band{height:42px;border-bottom:1px solid rgba(255,255,255,.18);background:rgba(0,34,67,.55)}.utility-inner{height:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:12px;letter-spacing:.04em}.login-shell{width:min(1180px,calc(100% - 40px));margin:auto;display:grid;grid-template-columns:1.15fr .85fr;gap:80px;align-items:center;padding:54px 0}.login-intro{max-width:650px}.login-intro .hdu-lockup b,.login-intro .hdu-lockup strong{color:#fff}.login-intro .hdu-mark{box-shadow:0 0 0 2px #fff,0 12px 28px rgba(0,0,0,.2)}.login-kicker{display:inline-block;margin-top:55px;padding:7px 11px;border-left:4px solid var(--hdu-gold);background:rgba(255,255,255,.09);font-size:12px;font-weight:800;letter-spacing:.13em}.login-intro h1{margin:18px 0 16px;font:700 clamp(42px,5.8vw,72px)/1.04 "Roboto",Arial,sans-serif}.login-intro>p{max-width:610px;font-size:18px;color:#dceaf5}.login-points{display:flex;gap:14px;margin-top:30px}.login-points div{min-width:130px;padding:14px 16px;border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.08);border-radius:12px}.login-points b{display:block;font-size:26px;color:#fff}.login-points span{font-size:12px;color:#d8e7f2}.login-card{background:#fff;color:#1d2f40;border-radius:12px;padding:34px;box-shadow:0 28px 70px rgba(0,28,56,.35);border-top:5px solid var(--hdu-red)}.login-card-head>span{color:var(--hdu-red);font-size:12px;font-weight:900;letter-spacing:.12em}.login-card-head h2{margin:7px 0 5px;font:700 28px/1.2 "Roboto",Arial,sans-serif;color:var(--hdu-blue-deep)}.login-card-head p{margin:0 0 24px;color:#6b7a88}.login-card form>label{display:block;margin:14px 0 7px;font-weight:750;font-size:13px;color:#334b5f}.input-with-icon{display:flex;align-items:center;border:1px solid #cbd7e2;border-radius:8px;background:#fff;overflow:hidden}.input-with-icon>span{padding:0 12px;color:#718395}.input-with-icon input{width:100%;height:48px;border:0;outline:0;padding:0 4px;font:inherit}.icon-button{height:48px;width:48px;border:0;background:transparent;cursor:pointer}.captcha-row{display:grid;grid-template-columns:150px 40px 1fr;gap:8px}.captcha-box{height:48px;border:1px solid #b8c9d8;border-radius:8px;background:#eef4f8;overflow:hidden}.captcha-box svg{width:100%;height:100%;display:block}.captcha-refresh{border:1px solid #b8c9d8;border-radius:8px;background:#f7fafc;color:var(--hdu-blue);font-size:22px;cursor:pointer}.captcha-row input{min-width:0;border:1px solid #cbd7e2;border-radius:8px;padding:0 12px;font:inherit;text-transform:uppercase}.login-button{width:100%;margin-top:22px;height:50px;border-radius:8px;background:var(--hdu-blue);color:#fff}.login-button:hover{background:var(--hdu-blue-deep)}.login-button:disabled{opacity:.65;cursor:wait}.login-message{min-height:22px;margin-top:10px;font-size:13px;font-weight:700}.login-message.error{color:#b42318}.login-message.success{color:#16794a}.login-note{margin-top:18px;padding:12px 13px;border-radius:8px;background:#f3f7fb;color:#5f7385;font-size:12px}

/* Header, menu, footer */
.hdu-utility-bar{height:34px;background:var(--hdu-blue-deep);color:#dce9f3}.hdu-utility-bar a,.utility-button{color:#fff;text-decoration:none;font-size:12px}.utility-button{border:0;background:transparent;cursor:pointer}.divider{margin:0 10px;color:#82a7c4}.hdu-header{background:#fff;box-shadow:0 3px 12px rgba(14,54,85,.08)}.hdu-header-inner{min-height:102px;display:flex;align-items:center;justify-content:space-between;gap:28px}.header-course{text-align:right;display:grid;gap:5px}.header-course span{font-size:11px;font-weight:900;color:var(--hdu-red);letter-spacing:.12em}.header-course b{color:var(--hdu-blue-deep);font-size:15px}.hdu-nav{background:var(--hdu-blue)}.nav-inner{display:flex;align-items:stretch;overflow-x:auto}.hdu-nav a{position:relative;padding:13px 20px;color:#fff;text-decoration:none;font-size:14px;font-weight:750;white-space:nowrap;border-right:1px solid rgba(255,255,255,.12)}.hdu-nav a:hover,.hdu-nav a.active{background:var(--hdu-blue-deep)}.hdu-nav a.active:after{content:"";position:absolute;left:18px;right:18px;bottom:0;height:4px;background:var(--hdu-gold)}
.exam-toolbar{position:sticky;top:0;z-index:35;background:#fff;border-bottom:1px solid #c9d7e3;box-shadow:0 5px 18px rgba(0,54,101,.1)}.exam-toolbar-inner{min-height:58px;display:flex;align-items:center;gap:24px}.candidate-chip,.timer-chip,.toolbar-score{display:grid;line-height:1.1}.candidate-chip span,.timer-chip span,.toolbar-score span{font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:#738596}.candidate-chip b,.timer-chip b,.toolbar-score b{margin-top:4px;color:var(--hdu-blue-deep)}.timer-chip b{font-size:21px;font-variant-numeric:tabular-nums}.timer-chip.warning b{color:#b54708}.timer-chip.danger b{color:#b42318;animation:pulseText 1s infinite}.toolbar-score em{font-style:normal;font-size:22px;color:var(--hdu-red)}.toolbar-progress{height:7px;flex:1;min-width:90px;background:#e6edf3;border-radius:999px;overflow:hidden}.toolbar-progress>div{height:100%;width:0;background:linear-gradient(90deg,var(--hdu-blue),#0b78bd);transition:width .3s}.submit-exam-button{background:var(--hdu-red);color:#fff;border-radius:7px}.submit-exam-button:hover{background:#a81724}.submit-exam-button:disabled{background:#9aa8b4;cursor:not-allowed}

/* Nội dung thi */
.container{max-width:1240px;padding-top:26px}.card{border-radius:10px}.hero{border-top:5px solid var(--hdu-blue);background:linear-gradient(135deg,#fff 0,#fff 64%,#edf5fb 100%)}.hero h2{font-family:"Roboto",Arial,sans-serif;color:var(--hdu-blue-deep)}.badge,.eyebrow{color:var(--hdu-red)}.btn{border-radius:7px}.scorebox{border:1px solid #c9dceb;background:#fff}.score-ring{border-color:#d9e8f3;border-top-color:var(--hdu-red)}.grading-card{padding:22px 24px}.grading-title{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}.grading-title h2{margin:3px 0 0;font:700 25px/1.2 "Roboto",Arial,sans-serif;color:var(--hdu-blue-deep)}.grading-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}.grading-grid>div{display:grid;grid-template-columns:34px 1fr auto;gap:9px;align-items:center;padding:11px;border:1px solid #d9e3ec;border-radius:8px;background:#f9fbfd}.grading-grid b{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:#e9f3fb;color:var(--hdu-blue);font-size:12px}.grading-grid span{font-size:12px;font-weight:700}.grading-grid strong{font-size:12px;color:var(--hdu-red)}.grading-grid>div.completed{border-color:#8fd1ad;background:#edf9f2}.grading-grid>div.completed b{background:#16834f;color:#fff}.grading-grid>div.completed strong{color:#16834f}.point-label{display:inline-block;vertical-align:middle;margin-left:8px;padding:4px 8px;border-radius:999px;background:#fff0f1;color:var(--hdu-red);font:800 12px/1.2 system-ui}.section-title h2,.guide h2,.report-section h2{font-family:"Roboto",Arial,sans-serif;color:var(--hdu-blue-deep)}.number{background:#e9f3fb;color:var(--hdu-blue);border-radius:8px}.scenario{border-top:3px solid #d5e4ef}.scenario.completed{border-color:#75c99a;background:linear-gradient(180deg,#f5fff9,#fff 90px)}.scenario.completed .number{background:#16834f;color:#fff}.progress div{background:var(--hdu-red)}.final-submit-card{display:grid;grid-template-columns:1fr auto auto;gap:28px;align-items:center;padding:30px;border-left:6px solid var(--hdu-red)}.final-submit-card h2{margin:5px 0 7px;font-family:"Roboto",Arial,sans-serif;color:var(--hdu-blue-deep)}.final-submit-card p{margin:0;color:#667b8d;max-width:740px}.final-score-box{display:grid;text-align:center;padding:13px 22px;border-left:1px solid #d5e0e9;border-right:1px solid #d5e0e9}.final-score-box span,.final-score-box small{font-size:11px;color:#6b7f90}.final-score-box b{font-size:20px;color:var(--hdu-blue-deep)}.final-score-box em{font-style:normal;font-size:34px;color:var(--hdu-red)}.submit-exam-button.large{min-width:150px;padding:14px 22px}.exam-locked{pointer-events:none;filter:grayscale(.25);opacity:.78}.exam-submitted-banner{position:fixed;inset:auto 20px 20px auto;z-index:70;max-width:380px;padding:16px 18px;border-radius:10px;background:#ecfdf3;color:#166534;border:1px solid #75e0a7;box-shadow:0 14px 34px rgba(0,0,0,.16)}
.hdu-footer{margin-top:55px;background:var(--hdu-blue-deep);color:#d9e7f1;text-align:left;padding:0}.footer-grid{display:grid;grid-template-columns:1.25fr .85fr 1fr;gap:42px;padding:42px 0 34px}.footer-grid h3{margin:0 0 12px;color:#fff;font-family:"Roboto",Arial,sans-serif}.footer-grid p{margin:6px 0;font-size:13px}.footer-lockup b,.footer-lockup strong{color:#fff}.footer-lockup .hdu-mark{width:58px;height:58px;box-shadow:0 0 0 2px #fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:13px 0;font-size:12px;color:#a9c2d5}

/* Bảng kết quả */
.results-page{min-height:100vh;background:#f2f5f8}.results-main{width:min(1320px,calc(100% - 36px));margin:28px auto 60px}.results-hero{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:26px 28px;border-top:5px solid var(--hdu-blue)}.results-hero h1{margin:4px 0 5px;font:700 34px/1.15 "Roboto",Arial,sans-serif;color:var(--hdu-blue-deep)}.live-badge{display:flex;align-items:center;gap:8px;color:#166534;background:#ecfdf3;border:1px solid #abefc6;border-radius:999px;padding:8px 12px;font-size:12px;font-weight:800}.live-dot{width:9px;height:9px;border-radius:50%;background:#16a34a;animation:pulse 1.4s infinite}.stats-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin:18px 0}.stat-card{padding:18px;border-radius:9px}.stat-card span{display:block;color:#6e8090;font-size:12px;text-transform:uppercase;letter-spacing:.06em}.stat-card b{display:block;margin-top:6px;font-size:30px;color:var(--hdu-blue-deep)}.result-tools{display:flex;justify-content:space-between;gap:14px;align-items:center;padding:14px 18px;border-bottom:1px solid #d9e2ea}.result-tools input{width:min(360px,100%);border:1px solid #c9d6e1;border-radius:7px;padding:10px 12px}.updated-at{font-size:12px;color:#718292}.leaderboard-wrap{overflow:auto}.leaderboard{width:100%;border-collapse:collapse;min-width:960px}.leaderboard th{padding:12px 14px;background:#edf3f8;color:#39556d;text-align:left;font-size:11px;text-transform:uppercase;letter-spacing:.06em;border-bottom:1px solid #cfdae4}.leaderboard td{padding:13px 14px;border-bottom:1px solid #e6ecf1;font-size:13px}.leaderboard tbody tr:hover{background:#f8fbfd}.rank-badge{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:50%;background:#e8f1f8;color:var(--hdu-blue);font-weight:900}.leaderboard tr:nth-child(1) .rank-badge{background:#fff3ca;color:#8a5a00}.leaderboard tr:nth-child(2) .rank-badge{background:#edf1f4;color:#536575}.leaderboard tr:nth-child(3) .rank-badge{background:#f9e6d8;color:#914f23}.score-cell b{font-size:19px;color:var(--hdu-red)}.status-pill{display:inline-block;padding:5px 9px;border-radius:999px;font-size:11px;font-weight:800}.status-active{background:#fff7e8;color:#9a5b00}.status-submitted{background:#ecfdf3;color:#166534}.status-expired{background:#fef3f2;color:#b42318}.status-waiting{background:#f2f4f7;color:#667085}.score-mini{width:120px;height:6px;border-radius:999px;background:#e5ebf0;overflow:hidden}.score-mini i{display:block;height:100%;background:var(--hdu-blue)}.empty-results{text-align:center;padding:35px;color:#718292}

@keyframes pulseText{50%{opacity:.45}}
@media(max-width:1000px){.login-shell{grid-template-columns:1fr;gap:38px;padding:38px 0}.login-intro{max-width:none}.login-kicker{margin-top:32px}.login-card{width:min(620px,100%);margin:auto}.grading-grid{grid-template-columns:repeat(2,1fr)}.stats-grid{grid-template-columns:repeat(3,1fr)}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}.final-submit-card{grid-template-columns:1fr auto}.final-submit-card>button{grid-column:1/-1}.header-course{display:none}}
@media(max-width:760px){.login-campus-band{height:auto;padding:9px 0}.login-campus-band .utility-inner{display:grid}.login-shell{width:min(100% - 26px,620px)}.login-intro h1{font-size:44px}.login-points{display:grid;grid-template-columns:repeat(3,1fr)}.login-points div{min-width:0;padding:10px}.login-card{padding:25px 20px}.hdu-header-inner{min-height:84px}.hdu-lockup b{font-size:15px}.hdu-lockup strong{font-size:9px}.hdu-mark{width:55px;height:55px}.exam-toolbar-inner{gap:12px;flex-wrap:wrap;padding:9px 0}.toolbar-progress{order:5;flex-basis:100%}.candidate-chip{min-width:120px}.grading-grid{grid-template-columns:1fr}.final-submit-card{grid-template-columns:1fr}.final-score-box{border:0;border-top:1px solid #d5e0e9;border-bottom:1px solid #d5e0e9}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.stats-grid{grid-template-columns:repeat(2,1fr)}.results-hero{align-items:flex-start;flex-direction:column}.result-tools{align-items:flex-start;flex-direction:column}.result-tools input{width:100%}}
@media(max-width:500px){.login-points{grid-template-columns:1fr}.captcha-row{grid-template-columns:1fr 42px}.captcha-row input{grid-column:1/-1;height:45px}.hdu-lockup.large b{font-size:16px}.hdu-lockup.large strong{font-size:9px}.login-intro h1{font-size:36px}.hdu-utility-bar .utility-inner>span:first-child{display:none}.hdu-header-inner{justify-content:center}.hdu-nav a{padding:12px 14px}.candidate-chip{display:none}.timer-chip b{font-size:18px}.submit-exam-button{padding:9px 12px}.stats-grid{grid-template-columns:1fr 1fr}.stat-card b{font-size:24px}}
@media(min-width:1001px){.stats-grid{grid-template-columns:repeat(6,1fr)}}

/* Phiên bản 3: logo chính thức, hướng dẫn đăng nhập và quy trình đầu trang */
.hdu-logo-lockup{display:flex;align-items:center;min-width:0}
.hdu-logo-lockup img{display:block;max-width:100%;height:auto;object-fit:contain}
.login-logo{width:min(650px,100%);padding:8px 12px;border-radius:10px;background:#fff;box-shadow:0 12px 30px rgba(0,22,45,.22)}
.login-logo img{width:100%}
.header-logo{width:min(600px,58vw)}
.header-logo img{width:100%}
.footer-logo{width:min(430px,100%);padding:7px 10px;border-radius:8px;background:#fff}
.footer-logo img{width:100%}
.login-guide{margin-top:24px;padding:18px 20px;border:1px solid rgba(255,255,255,.22);border-radius:12px;background:rgba(0,31,64,.34);backdrop-filter:blur(5px)}
.login-guide h2{margin:0 0 5px;font:700 22px/1.25 "Roboto",Arial,sans-serif;color:#fff}
.login-guide>p{margin:0 0 10px;color:#dceaf5;font-size:13px}
.login-guide ol{display:grid;gap:7px;margin:0;padding-left:22px;color:#f4f8fb;font-size:13px}
.login-guide li::marker{color:var(--hdu-gold);font-weight:900}
.login-guide-alert{margin-top:12px;padding:9px 11px;border-left:4px solid var(--hdu-gold);background:rgba(255,255,255,.1);color:#fff;font-size:12px;font-weight:700}
.top-process{margin-top:0;border-top:5px solid var(--hdu-red);background:linear-gradient(135deg,#fff,#f3f8fc)}
.top-process .seven-steps{margin-top:8px}
.top-process .step{position:relative;overflow:hidden;background:#fff}
.top-process .step:after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--hdu-blue)}

@media(max-width:1000px){.header-logo{width:min(560px,72vw)}.login-logo{width:min(620px,100%)}}
@media(max-width:760px){.header-logo{width:min(520px,92vw)}.login-guide{padding:16px}.login-guide ol{font-size:12px}.hdu-header-inner{justify-content:flex-start}}
@media(max-width:500px){.login-logo{padding:6px 8px}.header-logo{width:100%}.footer-logo{width:100%}.login-guide{margin-top:18px}.login-guide h2{font-size:20px}}


/* Phiên bản 4: Roboto và hồ sơ học viên lần đầu */
html,body,button,input,textarea,select,table{font-family:"Roboto",Arial,sans-serif}
.profile-screen{min-height:100vh;display:grid;place-items:center;padding:34px 18px;background:linear-gradient(135deg,#003c71 0%,#005391 52%,#eef5fa 52%,#f8fafc 100%)}
.profile-screen.hidden{display:none}
.profile-shell{width:min(1050px,100%);display:grid;grid-template-columns:1fr 470px;gap:42px;align-items:center}
.profile-brand{padding:20px;border-radius:14px;background:#fff;box-shadow:0 18px 42px rgba(0,34,68,.22)}
.profile-brand img{display:block;width:100%;height:auto}
.profile-card{padding:34px;border-radius:14px;background:#fff;border-top:6px solid var(--hdu-red);box-shadow:0 20px 50px rgba(0,28,58,.24)}
.profile-card h1{margin:8px 0 10px;color:var(--hdu-blue-deep);font-size:30px;line-height:1.2}
.profile-card>p{margin:0 0 22px;color:#647789}
.profile-card form{display:grid;gap:8px}
.profile-card label{margin-top:6px;font-weight:700;color:#273f54}
.profile-card input{width:100%;border:1px solid #c8d5df;border-radius:7px;padding:12px 13px;font-size:15px;background:#fff}
.profile-card input[readonly]{background:#eef3f7;color:#667b8d}
.profile-card input:focus{outline:3px solid rgba(0,86,148,.15);border-color:var(--hdu-blue)}
.profile-notice{margin:9px 0 7px;padding:10px 12px;border-left:4px solid var(--hdu-gold);background:#fff8dc;color:#624b00;font-size:13px}
.candidate-chip{max-width:340px}
.candidate-chip small{display:block;max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#6d8090;font-size:10px;font-weight:500}
.leaderboard td:nth-child(2){min-width:190px}.leaderboard td:nth-child(3){min-width:220px;max-width:340px}
@media(max-width:900px){.profile-shell{grid-template-columns:1fr}.profile-brand{width:min(650px,100%);margin:auto}.profile-card{width:min(650px,100%);margin:auto}}
@media(max-width:520px){.profile-screen{padding:18px 12px;background:#eef5fa}.profile-brand{padding:9px}.profile-card{padding:24px 19px}.profile-card h1{font-size:25px}}

/* ===== HDU ATTT v5 base: portal, official exam and admin ===== */
:root{
  --hdu-blue:#173f7a;
  --hdu-blue-2:#24549a;
  --hdu-red:#c6202e;
  --hdu-gold:#f4c430;
  --surface:#ffffff;
  --surface-soft:#f4f7fb;
  --text:#18324a;
  --muted:#64778b;
  --border:#d9e2ec;
  --success:#16784a;
  --danger:#bd2532;
}
*{box-sizing:border-box}
html,body,button,input,select,textarea{font-family:"Roboto",Arial,sans-serif!important}
.hidden{display:none!important}
a.disabled{pointer-events:none;opacity:.58}
.portal-body,.official-body,.admin-body{background:#eef3f8;color:var(--text)}
.portal-login-shell{align-items:stretch}
.login-process-mini{display:grid;gap:9px;margin-top:24px;padding:20px;border:1px solid rgba(255,255,255,.28);border-radius:14px;background:rgba(11,44,83,.16)}
.login-process-mini b{font-size:16px}
.login-process-mini span{font-size:14px;line-height:1.45}
.dashboard-shell{min-height:100vh}
.portal-main{padding-top:30px;padding-bottom:50px}
.dashboard-welcome{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:30px;margin-bottom:24px;background:linear-gradient(135deg,#fff 0%,#f5f9ff 100%)}
.dashboard-welcome h1{font-size:32px;margin:6px 0 8px;color:var(--hdu-blue)}
.dashboard-welcome p{margin:0;color:var(--muted);font-weight:500}
.round-chip{min-width:310px;padding:18px 22px;border-radius:14px;background:var(--hdu-blue);color:#fff;display:grid;gap:5px;text-align:right}
.round-chip span,.round-chip small{opacity:.78}
.round-chip b{font-size:18px}
.learning-path{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:24px}
.mode-card{position:relative;overflow:hidden;padding:30px;display:flex;flex-direction:column;min-height:410px}
.mode-card .mode-number{position:absolute;right:22px;top:16px;font-size:64px;font-weight:900;color:rgba(23,63,122,.08)}
.mode-card h2{font-size:27px;color:var(--hdu-blue);margin:10px 0 12px;max-width:82%}
.mode-card>p{line-height:1.65;color:var(--muted);flex:1}
.mode-status-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:18px 0}
.mode-status-grid>div{padding:14px;border:1px solid var(--border);border-radius:10px;background:var(--surface-soft);display:grid;gap:6px}
.mode-status-grid span{font-size:12px;text-transform:uppercase;color:var(--muted);font-weight:700}
.mode-status-grid b{font-size:18px;color:var(--hdu-blue)}
.mode-status-grid em{font-style:normal}
.mode-progress{height:8px;background:#e4ebf3;border-radius:999px;overflow:hidden;margin-bottom:18px}
.mode-progress div{height:100%;background:linear-gradient(90deg,var(--hdu-blue-2),#3e8dd6);transition:width .3s}
.mode-action{width:100%;text-align:center;justify-content:center}
.official-mode-card{border-top:5px solid var(--hdu-red)}
.practice-mode-card{border-top:5px solid var(--hdu-blue)}
.mode-card.locked{filter:saturate(.68)}
.official-lock-note{padding:12px 14px;margin-bottom:14px;background:#fff4d8;border:1px solid #ead18b;border-radius:9px;color:#765a0a;font-weight:600}
.instruction-card{padding:30px}
.instruction-card h2{margin:8px 0 22px;color:var(--hdu-blue)}
.instruction-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.instruction-grid>div{padding:18px;border-left:4px solid var(--hdu-blue);background:var(--surface-soft);border-radius:8px}
.instruction-grid b{color:var(--hdu-blue)}
.instruction-grid p{margin:8px 0 0;color:var(--muted);line-height:1.55}
.practice-timer b{font-size:17px!important}

.compact-header .hdu-header-inner{padding-top:14px;padding-bottom:14px}
.official-start-screen{min-height:calc(100vh - 260px);display:grid;place-items:center;padding:44px 20px}
.official-start-card{width:min(900px,100%);padding:38px;text-align:center}
.official-start-card h1{font-size:34px;color:var(--hdu-blue);margin:10px 0}
.official-candidate{display:grid;gap:5px;margin:18px auto 24px}
.official-candidate b{font-size:21px}
.official-candidate span{color:var(--muted)}
.official-rules{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:28px 0}
.official-rules>div{padding:18px 12px;border:1px solid var(--border);border-radius:12px;background:var(--surface-soft);display:grid;gap:7px}
.official-rules b{font-size:20px;color:var(--hdu-blue)}
.official-rules span{font-size:13px;color:var(--muted);line-height:1.45}
.official-warning{padding:15px;border-radius:9px;background:#fff5e9;border:1px solid #f0c78f;color:#7d4b13}
.official-start-button{min-width:260px;margin:10px}
.official-toolbar{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--border);box-shadow:0 4px 14px rgba(20,48,78,.08)}
.official-toolbar-inner{display:grid;grid-template-columns:minmax(210px,1.4fr) minmax(140px,.7fr) minmax(130px,.6fr) minmax(150px,.8fr) auto;gap:14px;align-items:center;padding:12px 0}
.autosave-status{font-size:13px;font-weight:700;color:var(--muted);text-align:center;padding:9px 10px;border-radius:8px;background:#eef3f8}
.autosave-status.pending,.autosave-status.saving{color:#8a5b08;background:#fff5da}
.autosave-status.saved{color:var(--success);background:#e9f7ef}
.autosave-status.error{color:var(--danger);background:#fff0f1}
.official-container{padding-top:28px;padding-bottom:50px}
.official-overview{padding:28px;display:flex;justify-content:space-between;align-items:center;margin-bottom:22px}
.official-overview h1{color:var(--hdu-blue);margin:7px 0}
.official-progress-ring{width:120px;height:120px;border-radius:50%;border:10px solid #dfe9f4;display:grid;place-items:center;align-content:center;background:#fff}
.official-progress-ring b{font-size:30px;color:var(--hdu-blue)}
.official-progress-ring span{font-size:12px;color:var(--muted)}
.official-question-list{display:grid;gap:16px}
.official-question{padding:24px}
.official-question-head{display:flex;gap:16px;align-items:flex-start;margin-bottom:18px}
.official-question-head>span{flex:0 0 44px;height:44px;border-radius:12px;background:var(--hdu-blue);color:#fff;display:grid;place-items:center;font-weight:800}
.official-question-head h3{font-size:18px;line-height:1.5;margin:0 0 6px;color:#203b55}
.official-question-head small{color:var(--muted)}
.official-options{display:grid;grid-template-columns:1fr 1fr;gap:10px 14px;margin-left:60px}
.official-option{display:flex;align-items:flex-start;gap:10px;padding:13px 14px;border:1px solid var(--border);border-radius:9px;background:#fafcff;cursor:pointer;line-height:1.45}
.official-option:hover{border-color:#8eb1d5;background:#f2f7fc}
.official-option input{margin-top:3px;accent-color:var(--hdu-blue)}
.official-section-heading{margin:28px 0 18px;padding:28px}
.official-section-heading h2{color:var(--hdu-blue);margin:7px 0}
.official-simulation-list{display:grid;gap:20px}
.official-simulation{padding:26px}
.simulation-title{display:grid;grid-template-columns:50px 1fr auto;gap:14px;align-items:start;margin-bottom:20px}
.simulation-title>span{width:46px;height:46px;border-radius:12px;background:var(--hdu-red);color:#fff;display:grid;place-items:center;font-weight:800}
.simulation-title h3{margin:0 0 5px;color:var(--hdu-blue);font-size:22px}
.simulation-title p{margin:0;color:var(--muted);line-height:1.5}
.simulation-title>b{padding:8px 12px;background:#fff0f1;color:var(--hdu-red);border-radius:8px}
.simulation-data-split{display:grid;grid-template-columns:1.15fr .85fr;gap:16px}
.simulation-data-split>div,.simulation-table-wrap{overflow:auto;border:1px solid var(--border);border-radius:10px}
.simulation-data-split h4{margin:0;padding:12px 14px;background:#eaf1f8;color:var(--hdu-blue)}
.official-simulation table{width:100%;border-collapse:collapse;font-size:13px}
.official-simulation th,.official-simulation td{padding:10px;border-bottom:1px solid var(--border);text-align:left;white-space:nowrap}
.official-simulation th{background:#eef4f9;color:#35516b}
.simulation-fields{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:18px}
.simulation-fields.four-fields{grid-template-columns:repeat(2,1fr)}
.sim-field{display:grid;gap:7px;font-weight:700;color:#31516f}
.sim-field select{width:100%;padding:12px;border:1px solid #cbd7e3;border-radius:8px;background:#fff;color:#203b55}
.evidence-console-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.evidence-console-grid pre{margin:0;padding:15px;border-radius:9px;background:#102335;color:#dcecff;white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.5;min-height:110px}
.evidence-console-grid pre b{color:#8fd2ff}
.official-order-list{display:grid;gap:10px}
.official-order-item{display:flex;align-items:center;gap:12px;padding:15px;border:1px solid var(--border);background:#f8fbfe;border-radius:9px;cursor:grab}
.official-order-item span{font-size:20px;color:var(--hdu-blue)}
.official-order-item.dragging{opacity:.45}
.official-submit-card{margin-top:26px;padding:30px;display:flex;justify-content:space-between;align-items:center;gap:24px}
.official-submit-card h2{color:var(--hdu-blue);margin:7px 0}
.official-result-screen{min-height:calc(100vh - 200px);display:grid;place-items:center;padding:50px 20px}
.result-summary-card{width:min(760px,100%);padding:42px;text-align:center;position:relative}
.result-summary-card h1{color:var(--hdu-blue);margin:12px 0}
.official-final-score{display:grid;place-items:center;margin:20px auto;width:190px;height:190px;border-radius:50%;border:14px solid #dbe8f5;background:#fff}
.official-final-score b{font-size:64px;color:var(--hdu-blue);line-height:1}
.official-final-score span{color:var(--muted)}
.result-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:25px 0}
.result-metrics>div{padding:15px;border:1px solid var(--border);border-radius:9px;background:var(--surface-soft);display:grid;gap:6px}
.result-metrics span{font-size:12px;color:var(--muted);text-transform:uppercase}
.official-footer{margin-top:0}

.admin-login-screen{min-height:100vh;display:grid;place-items:center;padding:30px;background:linear-gradient(135deg,#10345f,#29568b)}
.admin-login-card{width:min(520px,100%);padding:34px}
.admin-login-card h1{color:var(--hdu-blue);font-size:29px;margin:8px 0}
.admin-login-card>p{color:var(--muted);line-height:1.55}
.admin-login-card form{display:grid;gap:8px;margin-top:22px}
.admin-login-card label{font-weight:700;color:#31516f;margin-top:8px}
.admin-login-card input{padding:12px;border:1px solid #cbd7e3;border-radius:8px}
.admin-logo{width:100%;max-height:110px;object-fit:contain;object-position:left;margin-bottom:18px}
.admin-back-link{display:inline-block;margin-top:18px;color:var(--hdu-blue);font-weight:700}
.admin-main{padding-top:26px;padding-bottom:50px}
.admin-round-card{padding:26px;display:flex;justify-content:space-between;align-items:center;gap:20px}
.admin-round-card h1{color:var(--hdu-blue);margin:7px 0}
.admin-actions{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:10px}
.btn.danger{background:var(--danger);color:#fff;border-color:var(--danger)}
.admin-stats{display:grid;grid-template-columns:repeat(7,1fr);gap:12px;margin:18px 0}
.admin-stats .card{padding:18px;display:grid;gap:7px;text-align:center}
.admin-stats span{font-size:12px;color:var(--muted);text-transform:uppercase;font-weight:700}
.admin-stats b{font-size:27px;color:var(--hdu-blue)}
.admin-results-card{padding:0;overflow:hidden}
.admin-table-head{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:24px}
.admin-table-head h2{margin:6px 0;color:var(--hdu-blue)}
.admin-table-tools{display:flex;align-items:center;gap:14px}
.admin-table-tools input{min-width:300px;padding:11px 13px;border:1px solid var(--border);border-radius:8px}
.admin-table-tools span{font-size:12px;color:var(--muted)}
.admin-table-wrap{overflow:auto}
.admin-results-table{width:100%;border-collapse:collapse;font-size:13px}
.admin-results-table th,.admin-results-table td{padding:12px 11px;border-top:1px solid var(--border);text-align:left;white-space:nowrap}
.admin-results-table th{background:#eaf1f8;color:#294b6a;position:sticky;top:0}
.admin-results-table td b,.admin-results-table td small{display:block}
.admin-results-table td small{color:var(--muted);margin-top:3px}
.admin-results-table .row-active{background:#fff9e9}
.empty-row{text-align:center!important;padding:30px!important;color:var(--muted)}
.modal-backdrop{position:fixed;inset:0;z-index:1000;background:rgba(6,20,35,.64);display:grid;place-items:center;padding:20px}
.modal-card{width:min(650px,100%);padding:30px;position:relative}
.modal-card h2{color:var(--hdu-blue)}
.modal-card>label:not(.admin-checkbox){display:block;font-weight:700;margin:18px 0 7px}
.modal-card>input{width:100%;padding:12px;border:1px solid var(--border);border-radius:8px}
.modal-close{position:absolute;right:16px;top:12px;border:0;background:transparent;font-size:28px;color:var(--muted);cursor:pointer}
.admin-checkbox{display:flex;gap:10px;align-items:flex-start;margin:18px 0}
.admin-checkbox input{margin-top:3px}
.danger-note{padding:14px;border-radius:8px;background:#fff1f2;border:1px solid #efb9bf;color:#7f222b}
.modal-actions{display:flex;gap:10px;margin-top:20px}

@media (max-width:1100px){
  .admin-stats{grid-template-columns:repeat(4,1fr)}
  .official-toolbar-inner{grid-template-columns:1fr 1fr 1fr;gap:8px}.official-toolbar-inner .autosave-status{grid-column:1/3}.official-toolbar-inner .submit-exam-button{grid-column:3}
  .simulation-data-split{grid-template-columns:1fr}
}
@media (max-width:820px){
  .learning-path,.instruction-grid,.official-options,.simulation-fields,.simulation-fields.four-fields,.evidence-console-grid{grid-template-columns:1fr}
  .dashboard-welcome,.admin-round-card,.admin-table-head,.official-overview,.official-submit-card{align-items:stretch;flex-direction:column}
  .round-chip{min-width:0;text-align:left}
  .official-rules,.result-metrics{grid-template-columns:1fr 1fr}
  .official-toolbar{position:static}.official-toolbar-inner{display:grid;grid-template-columns:1fr 1fr}.official-toolbar-inner .autosave-status,.official-toolbar-inner .submit-exam-button{grid-column:auto}
  .official-options{margin-left:0}
  .admin-stats{grid-template-columns:repeat(2,1fr)}
  .admin-table-tools{align-items:stretch;flex-direction:column}.admin-table-tools input{min-width:0;width:100%}
}
@media (max-width:520px){
  .official-rules,.result-metrics,.mode-status-grid{grid-template-columns:1fr}
  .official-start-card,.result-summary-card,.mode-card,.instruction-card{padding:22px}
  .official-toolbar-inner{grid-template-columns:1fr}
  .official-toolbar-inner .autosave-status,.official-toolbar-inner .submit-exam-button{grid-column:auto}
  .admin-stats{grid-template-columns:1fr 1fr}
  .admin-actions{justify-content:stretch}.admin-actions>*{width:100%;text-align:center;justify-content:center}
}


/* ===== HDU ATTT v6: login scale, instructor guide and public dashboard ===== */
.login-utility-links{display:flex;align-items:center;gap:22px}
.portal-login-shell{grid-template-columns:minmax(0,1.05fr) minmax(460px,.95fr);gap:64px}
.portal-login-shell .login-card{padding:42px 44px;border-radius:16px}
.portal-login-shell .login-card>h2{margin:10px 0 20px;font-size:34px;color:var(--hdu-blue-deep)}
.portal-login-shell .login-card>span{font-size:14px}
.portal-login-shell .login-card form>label{margin:18px 0 9px;font-size:16px}
.portal-login-shell .login-card input{height:58px;padding:0 16px;font-size:18px;border-radius:10px}
.portal-login-shell .password-row input{height:58px}
.portal-login-shell .password-toggle{width:58px;height:58px;font-size:20px}
.portal-login-shell .captcha-row{grid-template-columns:175px 50px 1fr;gap:10px}
.portal-login-shell .captcha-box,.portal-login-shell .captcha-refresh{height:58px}
.portal-login-shell .captcha-refresh{font-size:26px}
.portal-login-shell .login-button{height:60px;font-size:18px;margin-top:26px}
.portal-login-shell .login-note{font-size:14px;line-height:1.55;padding:15px 16px}
.portal-login-shell .login-message{font-size:15px}
.portal-login-shell .login-intro>p{font-size:20px;line-height:1.6}
.portal-login-shell .login-process-mini b{font-size:19px}
.portal-login-shell .login-process-mini span{font-size:16px}

.account-generation-note{margin:14px 0;padding:13px 15px;border-radius:9px;background:#edf6ff;border:1px solid #bed9ee;color:#234d70;line-height:1.55}
.account-generation-note code{font-weight:800;color:#9b1c20}
.instructor-guide-card{margin-top:20px;padding:28px}
.instructor-guide-head{display:flex;justify-content:space-between;align-items:flex-start;gap:24px}
.instructor-guide-head h2{margin:7px 0 8px;color:var(--hdu-blue-deep)}
.instructor-guide-head p{margin:0;color:var(--muted);max-width:760px;line-height:1.55}
.guide-summary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:22px 0}
.guide-summary-grid>div{padding:14px;border:1px solid #d7e4ee;border-radius:10px;background:#f7fafc}
.guide-summary-grid b,.guide-summary-grid span{display:block}.guide-summary-grid b{color:var(--hdu-blue);margin-bottom:5px}.guide-summary-grid span{font-size:14px;color:#4e6375}
.instructor-steps{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.instructor-steps details{border:1px solid #d6e2ec;border-radius:10px;background:#fff;overflow:hidden}
.instructor-steps summary{display:flex;justify-content:space-between;gap:15px;padding:15px 17px;cursor:pointer;background:#f4f8fb;color:var(--hdu-blue-deep)}
.instructor-steps summary span{font-size:13px;color:#657a8c;white-space:nowrap}
.instructor-steps details p{margin:12px 17px;color:#496073;line-height:1.58;font-size:14px}
.guide-warning{margin-top:16px;padding:13px 15px;border-left:4px solid var(--hdu-gold);background:#fff9e8;color:#6b5313}

.public-dashboard-body{min-height:100vh;background:radial-gradient(circle at 10% 10%,rgba(242,178,51,.15),transparent 28%),linear-gradient(145deg,#06284c,#0d4f86 55%,#0a365f);color:#fff;overflow:hidden}
.public-dashboard-shell{min-height:100vh;display:flex;flex-direction:column}
.public-dashboard-header{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:18px 3vw;border-bottom:1px solid rgba(255,255,255,.18);background:rgba(2,24,48,.55)}
.public-dashboard-logo{width:min(470px,42vw);padding:8px 12px;background:#fff;border-radius:10px}
.public-dashboard-logo img{display:block;width:100%}
.public-dashboard-title{text-align:right}.public-dashboard-title span{font-size:clamp(12px,1.2vw,18px);letter-spacing:.12em;color:#bcd7eb;font-weight:800}.public-dashboard-title h1{margin:4px 0;font-size:clamp(25px,3vw,48px)}.public-dashboard-title p{margin:0;color:#dcebf6;font-size:clamp(13px,1.35vw,19px)}
.public-dashboard-main{flex:1;padding:18px 3vw 22px;display:flex;flex-direction:column;gap:16px;min-height:0}
.public-stats{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}.public-stat{padding:13px 15px;border:1px solid rgba(255,255,255,.18);border-radius:13px;background:rgba(255,255,255,.09);backdrop-filter:blur(7px)}.public-stat span{display:block;color:#c9ddec;font-size:clamp(11px,1vw,15px)}.public-stat b{display:block;margin-top:4px;font-size:clamp(25px,2.6vw,42px);color:#fff}.public-stat.highlight b{color:#ffd66e}
.public-ranking{flex:1;min-height:0;border:1px solid rgba(255,255,255,.18);border-radius:16px;background:rgba(3,28,53,.72);overflow:hidden;box-shadow:0 18px 45px rgba(0,0,0,.22)}
.public-ranking-head{display:flex;justify-content:space-between;align-items:center;padding:14px 20px;background:rgba(255,255,255,.08)}.public-ranking-head h2{margin:0;font-size:clamp(20px,2vw,32px)}.public-ranking-head div{display:flex;gap:14px;align-items:center;color:#c9ddec;font-size:14px}.live-dot{display:inline-block;width:10px;height:10px;border-radius:50%;background:#38d27a;box-shadow:0 0 0 5px rgba(56,210,122,.15);animation:livePulse 1.6s infinite}@keyframes livePulse{50%{opacity:.5}}
.public-table-wrap{height:calc(100% - 62px);overflow:hidden}.public-results-table{width:100%;border-collapse:collapse;table-layout:fixed}.public-results-table th{padding:12px 15px;text-align:left;color:#aecdE4;font-size:clamp(11px,1vw,15px);text-transform:uppercase;letter-spacing:.04em;border-bottom:1px solid rgba(255,255,255,.14)}.public-results-table td{padding:12px 15px;border-bottom:1px solid rgba(255,255,255,.09);font-size:clamp(14px,1.35vw,21px);vertical-align:middle}.public-results-table tr:last-child td{border-bottom:0}.public-results-table .rank-cell{font-weight:900;color:#ffd66e;font-size:clamp(20px,2vw,32px);width:7%}.public-results-table .name-cell b{display:block;font-size:1.08em}.public-results-table .name-cell small{display:block;color:#bbd1e1;margin-top:2px}.public-results-table .score-cell{font-weight:900;font-size:1.25em;color:#fff}.public-results-table .status-active{color:#69e5a0}.public-results-table .status-done{color:#ffd66e}.public-results-table .status-waiting{color:#b8c9d6}.public-empty{text-align:center!important;padding:50px!important;color:#c7d9e7}
.public-dashboard-footer{display:flex;justify-content:space-between;align-items:center;padding:8px 3vw 11px;color:#b9cfe0;font-size:12px;background:rgba(1,19,37,.4)}
.public-dashboard-actions{display:flex;gap:8px}.dashboard-icon-button{border:1px solid rgba(255,255,255,.25);background:rgba(255,255,255,.08);color:#fff;border-radius:8px;padding:8px 12px;cursor:pointer}
.public-podium{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.podium-card{display:flex;align-items:center;gap:14px;padding:12px 16px;border:1px solid rgba(255,255,255,.17);border-radius:13px;background:rgba(255,255,255,.08)}.podium-rank{font-size:30px}.podium-info{min-width:0;flex:1}.podium-info b,.podium-info span{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.podium-info b{font-size:clamp(15px,1.4vw,22px)}.podium-info span{color:#c1d6e6;font-size:13px}.podium-score{font-size:clamp(24px,2.3vw,38px);font-weight:900;color:#ffd66e}

@media(max-width:1000px){.portal-login-shell{grid-template-columns:1fr}.instructor-steps{grid-template-columns:1fr}.guide-summary-grid{grid-template-columns:1fr}.public-stats{grid-template-columns:repeat(3,1fr)}.public-podium{display:none}.public-dashboard-logo{width:min(500px,55vw)}}
@media(max-width:700px){.portal-login-shell .login-card{padding:30px 24px}.portal-login-shell .captcha-row{grid-template-columns:1fr 50px}.portal-login-shell .captcha-row input{grid-column:1/-1}.instructor-guide-head{flex-direction:column}.public-dashboard-body{overflow:auto}.public-dashboard-header{align-items:flex-start;flex-direction:column}.public-dashboard-logo{width:100%}.public-dashboard-title{text-align:left}.public-stats{grid-template-columns:repeat(2,1fr)}.public-table-wrap{overflow:auto}.public-results-table{min-width:780px}.public-dashboard-footer{flex-direction:column;gap:8px;align-items:flex-start}}
@media print{.admin-login-screen,.hdu-utility-bar,.admin-round-card,.admin-stats,.admin-results-card,.modal-backdrop{display:none!important}.admin-shell{display:block!important}.instructor-guide-card{box-shadow:none;border:0}.instructor-steps{grid-template-columns:1fr}.instructor-steps details{break-inside:avoid}.instructor-steps details:not([open])>*:not(summary){display:block}.instructor-guide-head .admin-actions{display:none}}


/* ===== HDU ATTT v6.1: phiên mô phỏng riêng của giảng viên ===== */
.admin-demo-notice{background:#fff3cd;border-top:1px solid #e5c669;border-bottom:1px solid #e5c669;color:#543d00}
.admin-demo-notice-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:13px 0}
.admin-demo-notice-inner>div{display:flex;flex-direction:column;gap:3px}
.admin-demo-notice-inner b{font-size:16px;letter-spacing:.02em}
.admin-demo-notice-inner span{font-size:14px;line-height:1.45}
.admin-demo-mode .exam-toolbar{box-shadow:0 4px 15px rgba(95,66,0,.16)}
@media (max-width:760px){.admin-demo-notice-inner{align-items:flex-start;flex-direction:column}.admin-demo-notice-inner .btn{width:100%}}