/* NGÂN HÀNG ĐỀ PRO — AI, hình thủ công, phiên bản và sinh đề */
.nhd-pro-alert{display:flex;gap:10px;align-items:center;margin:0 0 14px;padding:11px 14px;border-radius:13px;background:#FFF4EE;border-left:4px solid #BF4E14;color:#6f3b22}.nhd-pro-alert b{white-space:nowrap}.nhd-pro-alert span{font-size:12px}
.nhd-pro-assets{margin-top:14px}.nhd-asset-tabs{display:flex;gap:4px;padding:9px 12px;border-bottom:1px solid var(--vien);overflow:auto;background:#F8FAFD}.nhd-asset-tabs button{border:0;background:transparent;color:#63708a;border-radius:9px;padding:7px 12px;white-space:nowrap;font-size:12px;font-weight:650}.nhd-asset-tabs button.on{background:#D9E1F2;color:#1F3864}
.nhd-pro-two{display:grid;grid-template-columns:minmax(420px,1fr) minmax(360px,.86fr);gap:15px}.nhd-code-tall{min-height:270px!important;font-family:Consolas,"Courier New",monospace!important;font-size:12px!important;line-height:1.45!important;white-space:pre!important}.nhd-svg-paper{height:370px;border:1px solid #DDE5F0;border-radius:14px;background:#fff;overflow:hidden}.nhd-svg-paper iframe{width:100%;height:100%;border:0}.nhd-svg-rule-mini{margin-top:8px;padding:9px 11px;border-radius:10px;background:#F4F7FC;color:#66748a;font-size:11px;line-height:1.5}
.nhd-svg-check{margin-top:10px;border-radius:11px;padding:10px 12px;display:flex;flex-direction:column;gap:3px;font-size:11px}.nhd-svg-check.ok{background:#EDF7EF;color:#28613b}.nhd-svg-check.warn{background:#FFF4EE;color:#8c4424}.nhd-svg-check .w{color:#8b6500}
.nhd-upload-zone{border:1.5px dashed #B8C7DB;border-radius:15px;background:#F8FAFD;padding:21px;text-align:center;margin-bottom:14px}.nhd-upload-zone b{font-size:15px}.nhd-upload-zone p{color:#718097;margin:5px 0 12px}.nhd-upload-zone input{max-width:100%}.nhd-upload-zone small{display:block;color:#8494AC;margin-top:8px}
.nhd-file-chip{display:flex;align-items:center;gap:9px;padding:9px 11px;border:1px solid #DDE5F0;border-radius:11px;background:#F8FAFD;margin-bottom:12px}.nhd-file-chip b{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.nhd-file-chip span{color:#8494AC;font-size:10px;margin-left:auto}.nhd-file-chip button{border:0;border-radius:999px;background:#D9E1F2;color:#1F3864;padding:5px 10px}
.nhd-ai-result-head{margin:13px 0 7px;padding:9px 11px;border-radius:11px;background:#F4F7FC;display:flex;flex-direction:column;gap:3px}.nhd-ai-result-head span{font-size:11px;color:#708098}.nhd-actions button:disabled{opacity:.45;cursor:not-allowed}
.nhd-asset-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px}.nhd-asset-card{border:1px solid #E2E8F1;border-radius:14px;padding:10px;display:flex;flex-direction:column;gap:5px;background:#fff}.nhd-asset-preview{height:150px;border-radius:10px;background:#F4F7FC;display:grid;place-items:center;overflow:hidden;color:#8494AC}.nhd-asset-preview.checker{background-color:#fff;background-image:linear-gradient(45deg,#e8edf4 25%,transparent 25%),linear-gradient(-45deg,#e8edf4 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#e8edf4 75%),linear-gradient(-45deg,transparent 75%,#e8edf4 75%);background-size:20px 20px;background-position:0 0,0 10px,10px -10px,-10px 0}.nhd-asset-preview img{max-width:100%;max-height:100%;object-fit:contain}.nhd-pdf{font-size:28px;color:#BF4E14}.nhd-asset-card>small{color:#8494AC}.nhd-asset-card>div:last-child{display:flex;gap:5px;margin-top:auto}.nhd-asset-card button,.nhd-version-list button{border:1px solid #DDE5F0;background:#fff;color:#1F3864;border-radius:8px;padding:5px 8px;font-size:10.5px}.nhd-asset-card button.danger,.nhd-version-list button.danger{color:#A03027}
.nhd-version-list{display:flex;flex-direction:column;gap:7px}.nhd-version-list>div{display:grid;grid-template-columns:110px minmax(160px,1fr) minmax(170px,1fr) auto;align-items:center;gap:9px;padding:10px 11px;border:1px solid #E6EBF2;border-radius:11px}.nhd-version-list small{color:#8494AC}.nhd-version-list>div>div{display:flex;gap:5px;flex-wrap:wrap}.nhd-asset-kind{font-size:10px;font-weight:750;color:#2E74B5;background:#EDF4FC;border-radius:999px;padding:4px 8px;text-align:center}
.nhd-ai-layout,.nhd-exam-layout{display:grid;grid-template-columns:minmax(390px,.82fr) minmax(500px,1.18fr);gap:14px;align-items:start}.nhd-ai-placeholder{min-height:420px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#8494AC;gap:6px}.nhd-ai-placeholder b{color:#1F3864;font-size:17px}.nhd-ai-warning{margin-top:13px;padding:10px 12px;border-left:4px solid #BF4E14;background:#FFF4EE;border-radius:11px;color:#7b482e;font-size:11.5px}.nhd-confidence{font-size:10px;border-radius:999px;padding:4px 9px;font-weight:750}.nhd-confidence.cao{background:#EAF5EC;color:#2F6D42}.nhd-confidence.trung_binh{background:#FFF4E6;color:#946018}.nhd-confidence.thap{background:#FBECEB;color:#963a31}.nhd-ai-draft{display:flex;flex-direction:column;gap:12px}.nhd-draft-class{background:#EDF4FC;color:#1F3864;border-radius:11px;padding:9px 11px;font-size:11px}.nhd-math-text,.nhd-ai-draft ol{font-family:"Palatino Linotype",Palatino,"Book Antiqua",Georgia,serif;font-size:12pt;line-height:1.5}.nhd-ai-draft ol{padding-left:25px}.nhd-ai-draft ol li{margin-bottom:5px}.nhd-uncertainty{background:#FFF7ED;border-left:4px solid #BF4E14;border-radius:11px;padding:10px 12px;display:flex;flex-direction:column;gap:3px;color:#81502f;font-size:11.5px}
.nhd-crop-box{width:min(980px,96vw);max-height:94vh;background:#fff;border-radius:18px;display:flex;flex-direction:column;overflow:hidden}.nhd-crop-help{padding:9px 16px;background:#F4F7FC;color:#65738a;font-size:12px}.nhd-crop-box canvas{max-width:calc(100% - 24px);max-height:62vh;align-self:center;margin:12px;box-shadow:0 0 0 1px #DDE5F0;cursor:crosshair}.nhd-crop-box .nhd-modal-actions{padding:0 16px 16px}
.nhd-exam-layout>.card:nth-child(2){position:sticky;top:80px}.nhd-grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.nhd-exam-preview h4{margin:16px 0 7px;color:#2E74B5;border-bottom:1px solid #DDE5F0;padding-bottom:5px}.nhd-exam-preview h4:first-child{margin-top:0}.nhd-exam-preview article{padding:9px 3px;border-bottom:1px solid #EEF2F7}.nhd-exam-preview article p{font-family:"Palatino Linotype",Palatino,"Book Antiqua",Georgia,serif;font-size:12pt;margin:5px 0}.nhd-exam-preview article small{color:#8494AC}
.nhd-pro-settings{margin-top:14px}.nhd-color-row{display:grid;grid-template-columns:22px 86px 1fr;align-items:center;gap:9px;padding:7px 0;border-bottom:1px solid #EEF2F7}.nhd-color-row i{width:20px;height:20px;border-radius:6px}.nhd-color-row code{font-weight:700;color:#1F3864}
.nhd-pro-modal{z-index:120}.nhd-asset-modal{width:min(980px,95vw);max-height:92vh;background:#fff;border-radius:18px;overflow:hidden}.nhd-asset-modal-body{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:14px;padding:14px;height:min(720px,80vh)}.nhd-asset-modal iframe,.nhd-big-image{width:100%;height:100%;border:1px solid #DDE5F0;border-radius:12px}.nhd-big-image{display:grid;place-items:center;background:#F7F9FC;overflow:auto}.nhd-big-image img{max-width:100%;max-height:100%}.nhd-asset-meta{display:flex;flex-direction:column;gap:7px}.nhd-asset-meta span,.nhd-asset-meta small{color:#8494AC;font-size:11px}
@media(max-width:1100px){.nhd-pro-two,.nhd-ai-layout,.nhd-exam-layout{grid-template-columns:1fr}.nhd-exam-layout>.card:nth-child(2){position:static}.nhd-version-list>div{grid-template-columns:100px 1fr}.nhd-version-list>div small,.nhd-version-list>div>div{grid-column:2}.nhd-asset-modal-body{grid-template-columns:1fr;height:auto}.nhd-asset-modal iframe,.nhd-big-image{height:55vh}}
@media(max-width:650px){.nhd-grid3{grid-template-columns:1fr}.nhd-pro-two{display:block}.nhd-pro-two>div+div{margin-top:14px}.nhd-svg-paper{height:280px}.nhd-version-list>div{grid-template-columns:1fr}.nhd-version-list>div small,.nhd-version-list>div>div{grid-column:auto}.nhd-pro-alert{align-items:flex-start;flex-direction:column}}
.nhd-head-actions{display:flex;align-items:center;gap:7px}.nhd-check-result{margin-top:14px;border-radius:12px;padding:11px 13px;display:flex;flex-direction:column;gap:4px;font-size:11.5px}.nhd-check-result.ok{background:#EDF7EF;color:#285e3a}.nhd-check-result.warn{background:#FFF4EE;color:#854628}.nhd-check-result .suggest{color:#2E74B5}.nhd-question-main-asset{margin:16px auto 0;max-width:100%;min-height:80px;display:grid;place-items:center;border-radius:10px;overflow:hidden}.nhd-question-main-asset.checker{background-color:#fff;background-image:linear-gradient(45deg,#e8edf4 25%,transparent 25%),linear-gradient(-45deg,#e8edf4 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#e8edf4 75%),linear-gradient(-45deg,transparent 75%,#e8edf4 75%);background-size:20px 20px;background-position:0 0,0 10px,10px -10px,-10px 0}.nhd-question-main-asset img{max-width:100%;max-height:360px;object-fit:contain}

/* Bản nháp nhiều câu */
.nhd-draft-nav{display:flex;align-items:center;gap:8px;margin-bottom:10px;flex-wrap:wrap}
.nhd-draft-nav select{min-width:220px;flex:1;border:1px solid #DDE5F0;border-radius:12px;padding:9px 12px;background:#fff;color:#1F3864}
.nhd-draft-nav button,.nhd-draft-strip button{border:1px solid #DDE5F0;background:#fff;color:#1F3864;border-radius:10px;padding:8px 11px;cursor:pointer}
.nhd-draft-nav button:disabled{opacity:.4;cursor:not-allowed}
.nhd-draft-strip{display:flex;gap:6px;flex-wrap:wrap;margin:0 0 14px}
.nhd-draft-strip button.on{background:#2E74B5;color:#fff;border-color:#2E74B5}
.nhd-draft-strip button.done{box-shadow:inset 0 -3px 0 #BF4E14}
.nhd-draft-summary{padding:10px 12px;border-left:4px solid #2E74B5;background:#F5F8FC;border-radius:10px;margin-bottom:12px}