:root{color-scheme:light;--bg:#f5f8fd;--surface:#fff;--surface2:#f8faff;--text:#10213d;--muted:#61708a;--line:#dbe4f1;--line2:#c7d4e8;--primary:#1769e0;--primary2:#0e54bd;--soft:#eaf2ff;--danger:#c23b3b;--shadow:0 20px 55px rgba(31,57,95,.12);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--text);background:linear-gradient(180deg,#fff 0,var(--bg) 45rem);line-height:1.55}button,input{font:inherit}button{color:inherit}a{color:var(--primary)}code{padding:.1em .35em;border-radius:.35em;background:#edf3fb}[hidden]{display:none!important}.skip-link{position:fixed;z-index:100;top:8px;left:8px;transform:translateY(-150%);padding:8px 12px;background:#10213d;color:#fff;border-radius:8px}.skip-link:focus{transform:none}
.site-header{position:sticky;z-index:50;top:0;border-bottom:1px solid rgba(219,228,241,.9);background:rgba(255,255,255,.92);backdrop-filter:blur(14px)}.header-inner{width:min(1240px,calc(100% - 32px));min-height:70px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:850;text-decoration:none}.brand-mark,.file-icon{display:grid;place-items:center;width:36px;height:36px;border-radius:10px;color:#fff;background:var(--primary);font-weight:900;box-shadow:0 8px 20px rgba(23,105,224,.22)}.github-button{display:flex;align-items:center;gap:8px;min-height:40px;padding:0 14px;border:1px solid var(--line2);border-radius:10px;color:var(--text);background:#fff;text-decoration:none;font-weight:750}.github-button svg{width:20px;fill:currentColor}
main{width:min(1240px,calc(100% - 32px));margin:auto}.hero{min-height:680px;padding:70px 0 80px;display:grid;grid-template-columns:minmax(0,.92fr) minmax(430px,1.08fr);align-items:center;gap:clamp(36px,6vw,82px)}.eyebrow,.section-label{display:block;margin:0 0 10px;color:var(--primary);font-size:.76rem;font-weight:850;letter-spacing:.11em;text-transform:uppercase}h1{margin:0;font-size:clamp(3rem,6vw,5.4rem);line-height:.98;letter-spacing:-.055em}.hero-lead{max-width:650px;margin:24px 0 28px;color:var(--muted);font-size:clamp(1.05rem,1.5vw,1.22rem)}
.drop-zone{min-height:285px;padding:26px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;border:2px dashed #84aff0;border-radius:18px;background:rgba(255,255,255,.82);text-align:center;outline:none;transition:.18s}.drop-zone:hover,.drop-zone:focus-visible,.drop-zone.dragging{border-color:var(--primary);background:var(--soft);transform:translateY(-2px);box-shadow:0 14px 40px rgba(23,105,224,.12)}.drop-zone strong{font-size:1.22rem}.drop-zone>span,.privacy-note,.hero-actions>span{color:var(--muted)}.upload-icon{display:grid;place-items:center;width:66px;height:66px;margin-bottom:4px;border-radius:22px;color:var(--primary);background:var(--soft)}.upload-icon svg{width:34px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.privacy-note{margin:8px 0 0;font-size:.84rem}.hero-actions{display:flex;align-items:center;gap:16px;margin-top:16px;font-size:.88rem}
.primary-button,.secondary-button,.toolbar-button,.icon-button,.download-button{display:inline-flex;align-items:center;justify-content:center;min-height:40px;border-radius:10px;cursor:pointer;font-weight:750;transition:.15s}.primary-button{margin-top:9px;padding:0 20px;border:1px solid var(--primary);color:#fff;background:var(--primary);box-shadow:0 10px 24px rgba(23,105,224,.2)}.primary-button:hover{background:var(--primary2)}.primary-button.compact{min-height:38px;margin:0;padding:0 16px}.secondary-button,.toolbar-button,.icon-button,.download-button{border:1px solid var(--line2);background:#fff}.secondary-button{padding:0 17px}.toolbar-button{min-height:36px;padding:0 12px;font-size:.84rem}.icon-button{width:36px;min-height:36px;padding:0;font-size:1.2rem}.download-button{min-height:34px;padding:0 11px}.secondary-button:hover,.toolbar-button:hover,.icon-button:hover,.download-button:hover{background:var(--surface2);border-color:#9db1ce}
.result-preview{position:relative}.preview-window{overflow:hidden;border:1px solid var(--line);border-radius:20px;background:#fff;box-shadow:var(--shadow);transform:rotate(1deg)}.preview-bar{height:54px;padding:0 18px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);color:var(--muted);font-size:.84rem}.mini-map{position:relative;height:390px;background:radial-gradient(circle at center,#fff,#f6f9fe)}.mini-node{position:absolute;z-index:2;padding:10px 14px;border:1px solid #abc4e8;border-radius:10px;background:#fff;font-weight:750;box-shadow:0 8px 18px rgba(47,76,121,.1)}.root-node{left:8%;top:43%;color:#fff;border-color:var(--primary);background:var(--primary)}.n1{right:10%;top:18%}.n2{right:7%;top:45%}.n3{right:14%;top:72%}.connector{position:absolute;left:31%;top:50%;width:52%;height:3px;background:#7ba8e8;transform-origin:left}.c1{transform:rotate(-29deg)}.c2{transform:rotate(0)}.c3{transform:rotate(29deg)}.preview-benefits{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line)}.preview-benefits span{padding:14px 8px;text-align:center;color:var(--muted);font-size:.78rem;font-weight:700}.preview-benefits span+span{border-left:1px solid var(--line)}
.workspace{margin:20px 0 88px;overflow:hidden;border:1px solid var(--line);border-radius:22px;background:#fff;box-shadow:var(--shadow);scroll-margin-top:90px}.workspace-header,.viewer-toolbar,.view-tabs{padding:14px 18px;display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line)}.file-summary{min-width:0;display:flex;align-items:center;gap:12px}.file-summary>div{min-width:0}.file-summary strong,.file-summary span{display:block}.file-summary strong{max-width:440px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-summary span{color:var(--muted);font-size:.82rem}.workspace-actions,.map-controls{display:flex;align-items:center;gap:8px}.export-menu{position:relative}.menu{position:absolute;z-index:30;top:calc(100% + 8px);right:0;min-width:220px;padding:6px;border:1px solid var(--line);border-radius:12px;background:#fff;box-shadow:0 18px 45px rgba(31,57,95,.18)}.menu button{width:100%;padding:10px;border:0;border-radius:8px;background:transparent;text-align:left;cursor:pointer}.menu button:hover{background:var(--surface2)}.viewer-toolbar{background:#fbfcff}.search-wrap{position:relative;flex:1;max-width:580px}.search-wrap input{width:100%;height:40px;padding:0 80px 0 14px;border:1px solid var(--line2);border-radius:10px;outline:0}.search-wrap input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(23,105,224,.12)}#search-count{position:absolute;top:50%;right:12px;transform:translateY(-50%);color:var(--muted);font-size:.76rem}.search-results{position:absolute;z-index:40;top:calc(100% + 7px);left:0;right:0;max-height:330px;overflow:auto;padding:6px;border:1px solid var(--line);border-radius:12px;background:#fff;box-shadow:0 18px 45px rgba(31,57,95,.18)}.search-result{display:block;width:100%;padding:10px;border:0;border-radius:8px;background:transparent;text-align:left;cursor:pointer}.search-result:hover{background:var(--soft)}.search-result strong,.search-result span{display:block}.search-result span{margin-top:2px;color:var(--muted);font-size:.76rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}#zoom-level{min-width:46px;color:var(--muted);text-align:center;font-size:.8rem}.view-tabs{justify-content:flex-start;padding-top:0;padding-bottom:0;overflow-x:auto}.view-tab{min-height:50px;padding:0 14px;border:0;border-bottom:3px solid transparent;color:var(--muted);background:transparent;cursor:pointer;font-weight:750;white-space:nowrap}.view-tab.active{color:var(--primary);border-bottom-color:var(--primary)}.tab-count{display:inline-grid;min-width:22px;height:22px;place-items:center;margin-left:5px;border-radius:999px;background:#edf2fa;font-size:.7rem}
.viewer-grid{display:grid;grid-template-columns:minmax(0,1fr) 330px;min-height:600px}.viewer-content{min-width:0;border-right:1px solid var(--line)}.view-panel{min-height:600px;height:100%;background:#fbfcff}#preview-panel{padding:24px;display:grid;place-items:center;overflow:auto}#preview-image{display:block;max-width:100%;max-height:760px;object-fit:contain;border:1px solid var(--line);background:#fff;box-shadow:0 12px 35px rgba(31,57,95,.09)}.empty-state{max-width:440px;padding:34px;border:1px dashed var(--line2);border-radius:16px;background:#fff;text-align:center}.empty-state strong,.empty-state span{display:block}.empty-state span{margin-top:8px;color:var(--muted)}.mindmap-canvas{position:relative;width:100%;min-height:600px;height:100%;overflow:hidden;background-image:radial-gradient(#d7e1f0 1px,transparent 1px);background-size:22px 22px;touch-action:none}.mindmap-canvas svg{display:block;width:100%;height:100%;min-height:600px;cursor:grab;user-select:none}.mindmap-canvas svg.dragging{cursor:grabbing}.map-edge{fill:none;stroke:#9db6d8;stroke-width:2.2}.map-node rect{fill:#fff;stroke:#a8bddb;stroke-width:1.4;filter:drop-shadow(0 5px 8px rgba(41,66,103,.12))}.map-node.root rect{fill:var(--primary);stroke:var(--primary)}.map-node text{fill:var(--text);font-size:14px;font-weight:700;pointer-events:none}.map-node.root text{fill:#fff}.map-node.selected rect{stroke:#e5962f;stroke-width:3}.map-node.search-match rect{fill:#fff5cf;stroke:#d99b28}.map-collapse circle{fill:#fff;stroke:var(--primary);stroke-width:1.5}.map-collapse text{fill:var(--primary);font-size:12px;font-weight:900}
#outline-panel,#attachments-panel{padding:20px;overflow:auto}.outline-topic{margin:4px 0 4px 16px}.outline-topic.root{margin-left:0}.outline-topic>summary{padding:9px 10px;display:flex;align-items:center;gap:8px;border-radius:8px;cursor:pointer;font-weight:700;list-style:none}.outline-topic>summary::-webkit-details-marker{display:none}.outline-topic>summary:before{content:'›';color:var(--primary);font-size:1.2rem;transition:.15s}.outline-topic[open]>summary:before{transform:rotate(90deg)}.outline-topic>summary:hover{background:var(--soft)}.outline-badges{display:inline-flex;gap:5px;margin-left:auto}.outline-badge{padding:2px 6px;border-radius:999px;color:var(--muted);background:#edf2f9;font-size:.66rem}.topic-details{min-width:0;padding:20px;background:#fff}.details-heading{padding-bottom:16px;display:flex;align-items:flex-start;justify-content:space-between;gap:10px;border-bottom:1px solid var(--line)}.details-heading h2{margin:0;font-size:1.2rem}.details-close{display:none}.details-placeholder{color:var(--muted)}.detail-section{padding:15px 0;border-bottom:1px solid var(--line)}.detail-section:last-child{border:0}.detail-section h3{margin:0 0 8px;color:var(--muted);font-size:.75rem;letter-spacing:.05em;text-transform:uppercase}.detail-section p{margin:0;white-space:pre-wrap}.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.detail-value{padding:9px;border-radius:9px;background:var(--surface2)}.detail-value span,.detail-value strong{display:block}.detail-value span{color:var(--muted);font-size:.68rem;text-transform:uppercase}.detail-value strong{font-size:.86rem}.detail-list{display:grid;gap:7px;margin:0;padding:0;list-style:none}.detail-list a{overflow-wrap:anywhere}.attachment-row{padding:14px;display:grid;grid-template-columns:minmax(0,1fr) auto auto;align-items:center;gap:14px;border:1px solid var(--line);border-radius:12px;background:#fff}.attachment-row+.attachment-row{margin-top:10px}.attachment-row strong,.attachment-row span{display:block}.attachment-row span{color:var(--muted);font-size:.76rem}.compatibility-report{padding:20px;display:grid;grid-template-columns:240px 1fr;gap:30px;border-top:1px solid var(--line);background:#fff}.compatibility-report h2{margin:0;font-size:1.1rem}.report-grid{display:grid;grid-template-columns:repeat(6,minmax(70px,1fr));gap:8px}.report-stat{padding:10px;border-radius:10px;background:var(--surface2);text-align:center}.report-stat strong,.report-stat span{display:block}.report-stat span{color:var(--muted);font-size:.68rem}.report-notes{margin:12px 0 0;padding:0;color:var(--muted);font-size:.78rem;list-style-position:inside}
.content-section{padding:90px 0;border-top:1px solid rgba(219,228,241,.8)}.section-heading{max-width:720px;margin-bottom:36px}.section-heading h2{margin:0;font-size:clamp(2rem,4vw,3.1rem);line-height:1.08;letter-spacing:-.035em}.section-heading>p:last-child{color:var(--muted)}.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.feature-grid article{padding:24px;border:1px solid var(--line);border-radius:16px;background:#fff}.feature-grid article>span{color:var(--primary);font-size:.78rem;font-weight:900}.feature-grid h3{margin:16px 0 8px}.feature-grid p{margin:0;color:var(--muted);font-size:.9rem}.how-section{display:grid;grid-template-columns:.8fr 1.2fr;gap:60px}.steps{display:grid;gap:14px;margin:0;padding:0;list-style:none;counter-reset:steps}.steps li{position:relative;padding:20px 20px 20px 64px;border:1px solid var(--line);border-radius:14px;background:#fff;counter-increment:steps}.steps li:before{content:counter(steps);position:absolute;left:18px;top:18px;display:grid;width:30px;height:30px;place-items:center;border-radius:9px;color:#fff;background:var(--primary);font-weight:900}.steps strong,.steps span{display:block}.steps span{color:var(--muted)}.faq-section details{max-width:900px;padding:20px 0;border-bottom:1px solid var(--line)}.faq-section summary{cursor:pointer;font-weight:800}.faq-section p{color:var(--muted)}.toast{position:fixed;z-index:100;right:20px;bottom:20px;max-width:min(420px,calc(100% - 40px));padding:13px 16px;border-radius:12px;color:#fff;background:var(--text);box-shadow:0 16px 45px rgba(16,33,61,.25)}.toast.error{background:var(--danger)}footer{padding:30px 16px;border-top:1px solid var(--line);color:var(--muted);background:#fff;text-align:center;font-size:.86rem}
@media(max-width:1000px){.hero{grid-template-columns:1fr}.hero-copy{max-width:760px}.viewer-grid{grid-template-columns:minmax(0,1fr) 290px}.report-grid{grid-template-columns:repeat(3,1fr)}.feature-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:760px){main{width:calc(100% - 20px)}.header-inner{width:calc(100% - 20px);min-height:62px}.brand-mark{width:32px;height:32px}.brand{font-size:.94rem}.github-button{width:40px;padding:0;justify-content:center}.github-button span{display:none}.hero{min-height:0;padding:42px 0 60px;gap:44px}.drop-zone{min-height:260px;padding:20px 14px}.hero-actions{align-items:flex-start;flex-direction:column;gap:10px}.mini-map{height:310px}.workspace{border-radius:16px}.workspace-header,.viewer-toolbar{align-items:stretch;flex-direction:column}.workspace-actions{justify-content:space-between}.map-controls{flex-wrap:wrap}.search-wrap{max-width:none}.viewer-grid{display:block;min-height:520px}.viewer-content{border-right:0}.view-panel,.mindmap-canvas,.mindmap-canvas svg{min-height:520px}.topic-details{position:fixed;z-index:70;left:10px;right:10px;bottom:10px;max-height:75vh;overflow:auto;border:1px solid var(--line);border-radius:18px;box-shadow:0 20px 70px rgba(16,33,61,.28);transform:translateY(calc(100% + 30px));transition:.2s}.topic-details.open{transform:translateY(0)}.details-close{display:inline-flex}.compatibility-report{grid-template-columns:1fr;gap:14px}.feature-grid{grid-template-columns:1fr}.how-section{display:block}.steps{margin-top:28px}.content-section{padding:64px 0}.attachment-row{grid-template-columns:minmax(0,1fr) auto}.attachment-row>span{display:none}}
@media(max-width:430px){.result-preview{margin:0 -3px}.preview-benefits{grid-template-columns:1fr}.preview-benefits span+span{border-top:1px solid var(--line);border-left:0}.report-grid{grid-template-columns:repeat(2,1fr)}.map-controls .toolbar-button{flex:1}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}