/* AI import: quiet black/white workspace, one fine spectrum edge at the entrance. */
.ni-dialog{--ni-ink:#202124;--ni-muted:#74777c;--ni-line:#e6e7ea;--ni-paper:#fff;--ni-soft:#f6f7f8;margin:auto;padding:0;border:1px solid #e8e9eb;border-radius:22px;background:var(--ni-paper);color:var(--ni-ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;box-shadow:0 24px 100px #0002;max-height:calc(100dvh - 40px);overflow:hidden}
.ni-dialog::backdrop{background:rgb(20 24 32 / 36%)}
.ni-dialog [hidden],.ni-hint[hidden]{display:none!important}
.ni-dialog :focus-visible,.ni-hint :focus-visible{outline:2px solid #606bb6;outline-offset:3px}
.ni-dialog button,.ni-dialog input,.ni-dialog textarea{font:inherit}
.ni-dialog button{cursor:pointer}.ni-dialog button:disabled{opacity:.4;cursor:not-allowed}
.ni-dialog a{color:inherit;text-underline-offset:3px}.ni-sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.ni-chooser{width:min(560px,calc(100vw - 32px));overflow:auto}
.ni-header{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:30px 32px 24px}
.ni-eyebrow{font-size:11px;letter-spacing:.08em;color:var(--ni-muted);margin:0 0 9px}.ni-header h2{font-size:22px;font-weight:600;letter-spacing:-.04em;margin:0;line-height:1.35}
.ni-close{flex-shrink:0;width:34px;height:34px;border:0;background:transparent;border-radius:50%;font-size:25px!important;color:#74777c;line-height:1}.ni-close:hover{background:#f0f1f3;color:#202124}
.ni-choices{padding:0 32px;display:grid;gap:14px}.ni-choice{width:100%;border:1px solid var(--ni-line);border-radius:15px;background:#fff;display:flex;gap:16px;align-items:center;padding:23px 20px;text-align:left;transition:box-shadow .2s,background-color .2s}.ni-choice:hover{box-shadow:0 6px 22px #20212409;background-color:#fafafa}
.ni-choice-ai{border:1px solid transparent;background:linear-gradient(#fff,#fff) padding-box,linear-gradient(115deg,#90bffc 0%,#b19bdd 34%,#e7a1bb 64%,#e5ce96 100%) border-box}
.ni-choice-ai:hover{background:linear-gradient(#fdfcfe,#fdfcfe) padding-box,linear-gradient(115deg,#609bf0,#ab79d5,#df89ae,#d9b666) border-box;box-shadow:0 8px 30px #a18ac414}
.ni-choice-icon{flex:0 0 38px;font-size:35px;font-weight:300;line-height:1}.ni-file-icon{font-size:28px}.ni-choice-title{display:block;font-size:16px;font-weight:600;letter-spacing:-.02em}.ni-choice-description{display:block;color:var(--ni-muted);font-size:12px;margin-top:6px;line-height:1.7}.ni-membership-tag{display:inline-block;margin-top:11px;color:#767080;font-size:10px;letter-spacing:.015em}.ni-choice-arrow{font-size:19px;margin-left:auto;color:#909299}
.ni-chooser-footer{padding:24px 32px 28px;display:flex;justify-content:space-between;align-items:center;gap:12px;color:var(--ni-muted);font-size:11px}.ni-chooser-footer a{display:flex;align-items:center;gap:6px;text-decoration:none}.ni-info-icon{border:1px solid #c8cbd0;border-radius:50%;width:14px;height:14px;text-align:center;font-size:10px;line-height:12px}
.ni-workspace{width:min(1080px,calc(100vw - 48px));height:min(760px,calc(100dvh - 48px))}.ni-workspace[open]{display:flex;flex-direction:column}.ni-workspace-header{border-bottom:1px solid var(--ni-line);flex-shrink:0}.ni-workspace-header h2{font-size:23px}.ni-steps{display:flex;gap:22px;padding:0;margin:0 12px 0 auto;list-style:none}.ni-steps li{display:flex;align-items:center;gap:7px;font-size:11px;white-space:nowrap;color:#8e9299}.ni-steps li span{display:grid;place-items:center;width:21px;height:21px;border:1px solid #d9dce1;border-radius:50%;font-size:10px}.ni-steps li[aria-current=step]{color:#202124}.ni-steps li[aria-current=step] span{color:#fff;background:#202124;border-color:#202124}
.ni-workspace-body{flex:1;min-height:0;position:relative;display:flex;overflow:hidden}.ni-panel{width:100%;min-height:0;height:100%}.ni-paste-layout{display:grid;grid-template-columns:260px minmax(0,1fr);gap:42px;padding:34px}.ni-intro{border-right:1px solid var(--ni-line);padding:8px 32px 0 0}.ni-intro-symbol{font-size:32px;color:#727982}.ni-intro h3{font-size:34px;line-height:1.4;font-weight:500;letter-spacing:-.065em;margin:20px 0}.ni-intro>p{font-size:12px;line-height:1.9;color:var(--ni-muted)}.ni-limits{display:flex;flex-direction:column;gap:20px;margin:30px 0}.ni-limits dt{font-size:10px;color:var(--ni-muted);margin-bottom:5px}.ni-limits dd{font-size:23px;letter-spacing:-.04em;font-variant-numeric:tabular-nums;margin:0}.ni-limits dd span{font-size:10px;letter-spacing:0;color:var(--ni-muted)}
.ni-paste-form{min-height:0;display:flex;flex-direction:column;gap:15px}.ni-field-heading{display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:12px;flex-shrink:0}.ni-field-heading h3{font-size:14px;margin:0;font-weight:600}.ni-field-heading>span{font-variant-numeric:tabular-nums;color:#8e9299;font-size:11px;white-space:nowrap}
#import-ai-text{flex:1;min-height:160px;resize:none;border:1px solid #e3e5e9;border-radius:13px;background:#fafbfc;padding:20px;font-size:14px;line-height:2;color:#272b32;outline-offset:2px}#import-ai-text::placeholder{color:#a4a8ae;font-size:13px}#import-ai-text:focus{background:#fff;border-color:#b5bdce}#import-ai-text[aria-invalid=true]{border-color:#b85050}
.ni-small{font-size:11px;color:var(--ni-muted);line-height:1.8;margin:0}.ni-form-actions{display:flex;justify-content:space-between;gap:16px;padding-top:7px;flex-shrink:0}.ni-button{border:1px solid #dedfe3;border-radius:10px;min-height:40px;padding:10px 17px;background:#fff;color:#43474d;display:inline-flex;align-items:center;justify-content:center;gap:16px;font-size:12px!important;line-height:1.3;white-space:nowrap;transition:background-color .18s,box-shadow .18s}.ni-button:hover{background:#f6f7f9}.ni-button-primary{background:#222529;color:#fff;border-color:#222529}.ni-button-primary:hover{background:#080a0c;box-shadow:0 4px 12px #20212418}.ni-button-quiet{border-color:transparent;background:transparent;color:#74777c}.ni-text-button{border:0;background:transparent;color:#74777c;font-size:11px!important;padding:5px 0}.ni-text-button:hover{color:#202124}#ni-membership-hint{font-size:12px;line-height:1.8;margin:0}#ni-membership-hint a{display:inline-block;text-decoration:underline}
.ni-processing{display:grid;place-items:center;padding:30px;overflow:auto}.ni-processing-content{max-width:560px;width:100%;text-align:center}.ni-live-number{margin:30px 0 16px;display:flex;justify-content:center;align-items:baseline;gap:14px}.ni-live-number span:first-child{font-size:76px;letter-spacing:-.07em;font-weight:400;font-variant-numeric:tabular-nums;line-height:1}.ni-live-number span:last-child{font-size:13px;color:#74777c}#ni-progress-label{font-size:12px;color:#74777c;margin:0 0 24px}.ni-progress{height:4px;border-radius:8px;background:#edf0f3;overflow:hidden;width:100%}.ni-progress>span{display:block;width:100%;height:100%;border-radius:inherit;background:#343943;transform:scaleX(0);transform-origin:left}.ni-live-words{height:94px;display:flex;justify-content:center;align-content:center;align-items:center;flex-wrap:wrap;gap:8px;overflow:hidden;margin:16px 0}.ni-live-words span{border:1px solid #e5e7eb;border-radius:8px;padding:6px 10px;background:#fafbfc;font-size:12px;color:#737b87;max-width:200px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.ni-processing-content>.ni-button{margin-top:20px}
.ni-preview{display:flex;flex-direction:column;padding:27px 32px 0;gap:18px}.ni-preview-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-shrink:0}.ni-preview-toolbar h3{font-size:17px;font-weight:500;margin:0 0 5px}.ni-word-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));align-content:start;gap:10px;overflow:auto;flex:1;min-height:0;padding:3px 5px 8px 3px;margin:0;list-style:none}.ni-word-block{display:flex;align-items:center;gap:4px;border:1px solid #e5e7eb;background:#f9fafb;border-radius:10px;min-height:52px;padding:6px 7px 6px 12px;transition:border-color .18s,background-color .18s}.ni-word-block:focus-within{background:#fff;border-color:#aab5c9}.ni-word-block input{min-width:0;width:100%;padding:6px 0;border:0;background:transparent;font-size:14px;font-family:Georgia,"Times New Roman",serif;outline:none;color:#303844}.ni-word-block input:focus-visible{outline:0}.ni-word-block input[aria-invalid=true]{color:#a33232}.ni-word-block:has([aria-invalid=true]){border-color:#c26666;background:#fff6f5}.ni-word-block button{flex-shrink:0;border:0;background:transparent;color:#a4abb5;font-size:18px;width:24px;height:28px;border-radius:6px}.ni-word-block button:hover{background:#e9edf2;color:#313841}
.ni-notice{flex-shrink:0;font-size:11px;line-height:1.8;padding:12px 14px;background:#faf6ee;border:1px solid #eee5d5;color:#88754e;border-radius:9px;margin:0}.ni-panel-footer{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:19px 0 23px;border-top:1px solid var(--ni-line);flex-shrink:0}
.ni-target-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px}.ni-notebook-picker{padding:30px 32px;min-height:0;display:flex;flex-direction:column;gap:20px}.ni-search,#import-ai-name{border:1px solid #e1e4e9;border-radius:9px;padding:12px 14px;background:#fafbfc;font-size:12px!important;min-width:0;width:100%;color:#303844}.ni-search:focus,#import-ai-name:focus{background:#fff}.ni-notebook-list{overflow:auto;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));align-content:start;gap:12px;min-height:0;flex:1;padding:3px}.ni-notebook-card{position:relative;padding:19px 16px;border:1px solid #e5e7ec;border-radius:12px;background:#fff;text-align:left;min-height:104px;display:flex;flex-direction:column;gap:9px}.ni-notebook-card:hover{border-color:#b4bccb;background:#fafbfc}.ni-notebook-card[aria-pressed=true]{border-color:#586879;background:#f5f7fa}.ni-notebook-card[aria-pressed=true]::after{content:'✓';position:absolute;right:12px;top:12px;font-size:12px;color:#445366}.ni-notebook-card strong{font-size:13px;font-weight:500;overflow-wrap:anywhere;padding-right:16px}.ni-notebook-card small{font-size:11px;color:#8b929d}.ni-notebook-empty{grid-column:1/-1;padding:30px 0;color:#8b929d;font-size:12px}
.ni-save-panel{border-left:1px solid var(--ni-line);background:#fafbfc;padding:30px 28px;display:flex;flex-direction:column;gap:14px;min-height:0;overflow:auto}.ni-new-notebook{display:flex;gap:13px;align-items:center;text-align:left;padding:17px 14px;border:1px dashed #cbd1d9;border-radius:11px;background:#fff}.ni-new-notebook[aria-pressed=true]{border-style:solid;border-color:#586879;background:#f4f6f9}.ni-new-notebook>span:first-child{font-size:24px;color:#8f99a7}.ni-new-notebook>span:last-child{font-size:13px}.ni-new-notebook small{display:block;font-size:10px;color:#9ba1aa;margin-top:7px;line-height:1.6}#import-new-notebook label{display:block;font-size:11px;margin:3px 0 8px;color:#74777c}.ni-save-summary{margin:auto 0 9px;padding-top:26px}.ni-save-summary p{font-size:13px;color:#74777c;margin:12px 0}.ni-save-summary strong{font-size:33px;color:#303844;font-weight:500;font-variant-numeric:tabular-nums}.ni-save-summary>span:not(.ni-eyebrow){display:block;font-size:14px;overflow-wrap:anywhere}.ni-save-summary small{display:block;font-size:11px;line-height:1.8;color:#929aa5;margin-top:12px}.ni-save-panel>.ni-button{width:100%}
.ni-status:empty{display:none}.ni-status{font-size:12px;color:#866047;line-height:1.7;margin:0;padding:14px 32px;background:#faf6f1}.ni-workspace-status{border-top:1px solid #f0e9e1;flex-shrink:0;max-height:85px;overflow:auto}
.ni-hint{position:fixed;z-index:70;display:flex;align-items:center;gap:8px;background:#252931;color:#fff;border:1px solid #383e49;border-radius:12px;padding:13px 12px 13px 16px;max-width:calc(100vw - 24px);box-shadow:0 10px 34px #18213225}.ni-hint-main{font-size:12px;line-height:1.7;text-align:left;border:0;background:none;color:inherit;cursor:pointer}.ni-hint-main span{margin-left:10px;color:#bbc8e3}.ni-hint-close{width:24px;flex-shrink:0;border:0;background:none;color:#aeb7c7;font-size:19px;cursor:pointer}.ni-hint-arrow{position:absolute;top:-6px;left:var(--ni-arrow-x,24px);width:10px;height:10px;transform:rotate(45deg);background:#252931;border-left:1px solid #383e49;border-top:1px solid #383e49}
@media(max-width:850px){.ni-steps{gap:12px;margin-right:0}.ni-steps li{font-size:0;gap:0}.ni-steps li span{font-size:10px}.ni-paste-layout{grid-template-columns:190px minmax(0,1fr);gap:25px;padding:26px}.ni-intro{padding-right:22px}.ni-intro h3{font-size:28px}.ni-target-layout{grid-template-columns:minmax(0,1fr) 275px}.ni-notebook-picker{padding:25px 22px}.ni-save-panel{padding:25px 20px}.ni-notebook-list{grid-template-columns:1fr}}
@media(max-width:600px){.ni-dialog{border-radius:17px}.ni-workspace{width:calc(100vw - 20px);height:calc(100dvh - 24px);max-height:calc(100dvh - 24px)}.ni-header{padding:22px 20px;gap:12px}.ni-header h2,.ni-workspace-header h2{font-size:19px}.ni-choices{padding:0 20px}.ni-choice{padding:20px 15px;gap:12px}.ni-choice-icon{flex-basis:28px}.ni-chooser-footer{padding:22px 20px}.ni-chooser-footer>span{display:none}.ni-steps{gap:5px}.ni-paste-layout{display:flex;padding:23px 20px}.ni-intro{display:none}.ni-paste-form{width:100%;gap:13px}.ni-field-heading{align-items:flex-start;font-size:11px}.ni-field-heading>span{font-size:10px}#import-ai-text{padding:15px}.ni-form-actions{gap:6px}.ni-button{padding:10px 12px;gap:9px}.ni-preview{padding:22px 17px 0;gap:14px}.ni-preview-toolbar h3{font-size:16px}.ni-preview-toolbar .ni-small{max-width:210px}.ni-word-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.ni-panel-footer{gap:6px}.ni-panel-footer>.ni-small{display:none}.ni-target-layout{display:flex;flex-direction:column;overflow:auto}.ni-notebook-picker{padding:22px 20px;flex:1;min-height:220px;gap:12px}.ni-notebook-list{grid-template-columns:repeat(2,minmax(0,1fr));min-height:130px}.ni-notebook-card{min-height:80px;padding:14px 12px}.ni-save-panel{border-left:0;border-top:1px solid var(--ni-line);padding:18px 20px;gap:10px;flex-shrink:0;overflow:visible;display:grid;grid-template-columns:1fr 1fr}.ni-new-notebook{grid-column:1/-1;padding:12px}.ni-new-notebook small{display:none}#import-new-notebook{grid-column:1/-1}.ni-save-summary{grid-column:1/-1;padding:0;margin:2px 0;display:flex;align-items:baseline;flex-wrap:wrap;gap:4px 10px}.ni-save-summary .ni-eyebrow,.ni-save-summary small{display:none}.ni-save-summary p{margin:0}.ni-save-summary strong{font-size:24px}.ni-save-summary>span:not(.ni-eyebrow){font-size:12px}.ni-status{padding:10px 20px;font-size:11px}.ni-notice{font-size:10px;padding:9px 11px}.ni-processing{padding:25px}.ni-live-number span:first-child{font-size:64px}}
@media(prefers-reduced-motion:reduce){.ni-dialog *{transition:none!important}}