:root{--paper:#fff;--card:#fff;--ink:#181818;--sub:#737373;--muted:#737373;--line:#e5e5e5;--accent:#202020;--green:#4b4b4b;--soft:#f4f4f4;--side:#fafafa;--on-action:#fff;--surface:#fff;--raised:#f7f7f7;--selected:#e9e9e9;--theme-border:#d6d6d6;--focus:#888;--faint:#666}
:root[data-theme="dark"]{--paper:#111;--card:#1a1a1a;--ink:#ededed;--sub:#a3a3a3;--muted:#a3a3a3;--line:#333;--accent:#ececec;--green:#cecece;--soft:#242424;--side:#161616;--on-action:#151515;--surface:#1a1a1a;--raised:#202020;--selected:#303030;--theme-border:#494949;--focus:#aaa;--faint:#b0b0b0}
body{background:var(--paper);color:var(--ink)}
.sidebar{color:var(--ink);background:var(--side);border-right:1px solid var(--line)}.brand>svg,.nav-label,.demo-label,.sidebar-charge,.account-button>span:last-child,.account-button small{color:var(--sub)}.nav-item{color:var(--sub)}.nav-item.active{background:var(--ink);color:var(--paper)}.nav-item>span{color:inherit}.credit-mini{background:var(--surface);border-color:var(--line)}.credit-mini>span,.credit-mini strong{color:var(--ink)}.sidebar-charge{border-color:var(--line)}.avatar{background:var(--selected);color:var(--ink)}.account-button{border-color:var(--line)}.demo-label span{background:var(--sub)}.brand small{color:var(--sub)}
.primary{background:var(--ink);color:var(--paper);border-color:var(--ink)}.primary:hover:not(:disabled){background:var(--faint);border-color:var(--faint);color:var(--paper)}.secondary,.input,.source-toolbar select,#search{background:var(--surface);color:var(--ink);border-color:var(--line)}.secondary:hover{background:var(--soft)}.dropzone,.workflow,.balance-banner,.selected-file,.result-meta,.result-layout>aside{background:var(--raised);border-color:var(--line)}.workflow-item>span{background:var(--raised);color:var(--ink);border-color:var(--theme-border)}.workflow-item:after{border-color:var(--theme-border)!important}.workflow-item p,.workflow-item>svg,.experience-note p,.import-note,.dropzone>small,.book-empty small,.balance-banner small{color:var(--sub)}.experience-note{border-color:var(--line)}.step-dot,.upload-symbol,.format-tags span,.mode-badge,.book-badge,.modal-icon{background:var(--soft);color:var(--ink);border-color:var(--line)}.dropzone.dragover{background:var(--selected);border-color:var(--ink)}.book-card,.package,dialog,.ledger-wrap,.reader{background:var(--surface);color:var(--ink);border-color:var(--line)}.package.featured{border-color:var(--theme-border);box-shadow:0 0 0 1px var(--theme-border)}.book-cover,.book-cover.imported{background:var(--ink);border-color:var(--faint);color:var(--paper);box-shadow:3px 3px 0 var(--selected)}.book-empty{color:var(--sub);border-color:var(--theme-border)}.result-root,.result-node[aria-pressed=true],#extract-panel blockquote{background:var(--soft);color:var(--ink)}.result-node{border-color:var(--theme-border)}.status.error{color:var(--ink)}.status.error:before{content:'! ';font-weight:600}.positive,.negative{color:var(--ink)}.toast{background:var(--ink);color:var(--paper)}.heading-stamp{border-color:var(--theme-border);color:var(--sub)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline-color:var(--focus)}
.chapter-node{background:var(--raised);color:var(--ink)}.chapter-node[aria-pressed=true]{background:var(--ink);color:var(--paper);border-color:var(--ink)}.chapter-node[aria-pressed=true] span{color:inherit}.map-root{background:var(--soft)}#branches,.branch:before{border-color:var(--theme-border)}mark{background:var(--selected);color:var(--ink)}#original img{background:#fff;border-radius:4px}.edition{display:none}
@media(max-width:650px){.top-actions{gap:10px}.topbar{padding-left:4%;padding-right:4%}.breadcrumb,.slash{display:none}.top-actions .text-button{max-width:100px;overflow:hidden}.reader-heading{padding-top:20px}header:has(>.theme-toggle){height:auto;min-height:78px;flex-wrap:wrap;padding-top:14px;padding-bottom:14px;gap:12px}header:has(>.theme-toggle) .brand{font-size:17px}header:has(>.theme-toggle) nav{order:3;width:100%;justify-content:center}header:has(>.theme-toggle)>.theme-toggle{margin-left:auto}}
/* Green is reserved for actions, active states and small identity accents. */
:root{--accent:#28734e;--green:#28734e;--brand-soft:#edf6ef;--brand-border:#cde2d3;--action-bg:#28734e;--action-hover:#205c3e;--action-text:#fff;--focus:#579e72}
:root[data-theme="dark"]{--accent:#89cba2;--green:#89cba2;--brand-soft:#1c2c22;--brand-border:#354f3e;--action-bg:#88c7a0;--action-hover:#a0d6b4;--action-text:#10251a;--focus:#89cba2}
.theme-toggle{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;flex-shrink:0;padding:8px;border:1px solid var(--line);border-radius:50%;background:var(--surface);color:var(--sub);cursor:pointer}
.theme-toggle:hover{background:var(--soft);color:var(--ink)}.theme-toggle:focus-visible{outline:2px solid var(--focus);outline-offset:3px}.theme-toggle svg{display:block;width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}.theme-toggle .mode-sun{display:none}:root[data-theme="dark"] .theme-toggle .mode-moon{display:none}:root[data-theme="dark"] .theme-toggle .mode-sun{display:block}
.primary{background:var(--action-bg);border-color:var(--action-bg);color:var(--action-text)}.primary:hover:not(:disabled){background:var(--action-hover);border-color:var(--action-hover);color:var(--action-text)}.nav-item.active{background:var(--brand-soft);color:var(--green)}.brand>svg{color:var(--green)}.step-dot,.upload-symbol,.book-badge{background:var(--brand-soft);color:var(--green);border-color:var(--brand-border)}.dropzone.dragover{background:var(--brand-soft);border-color:var(--green)}.package.featured{border-color:var(--brand-border);box-shadow:0 0 0 1px var(--brand-border)}.chapter-node[aria-pressed=true]{background:var(--brand-soft);color:var(--green);border-color:var(--brand-border)}nav button[aria-pressed=true]{background:var(--brand-soft);color:var(--green)}.result-root{border-left-color:var(--green)}.result-node[aria-pressed=true]{background:var(--brand-soft);color:var(--green)}.positive{color:var(--green)}

@media(max-width:650px){.sidebar-bottom{display:block;padding-top:12px;margin:0}.credit-mini{display:flex;align-items:center;gap:12px;padding:10px 12px}.credit-mini>span{font-size:10px}.credit-mini strong{font-size:19px;margin:0}.sidebar-charge{width:auto;margin-left:auto;padding:0;border:0;gap:12px;font-size:10px}}
/* Account and sign-in */
.user-dropdown{position:relative;flex-shrink:0}.user-avatar{width:36px;height:36px;display:grid;place-items:center;border:1px solid var(--brand-border);border-radius:50%;background:var(--brand-soft);color:var(--green);padding:0;font-size:14px;font-weight:600}.user-avatar:hover,.user-avatar[aria-expanded=true]{box-shadow:0 0 0 3px var(--brand-soft)}.account-menu{position:absolute;right:0;top:calc(100% + 12px);width:228px;max-width:calc(100vw - 32px);padding:7px;background:var(--surface);border:1px solid var(--line);border-radius:12px;box-shadow:0 12px 40px #00000018;z-index:40}.menu-identity{display:flex;align-items:center;gap:11px;padding:13px 10px 17px;margin-bottom:5px;border-bottom:1px solid var(--line)}.menu-avatar{width:35px;height:35px;border-radius:50%;background:var(--brand-soft);color:var(--green);display:grid;place-items:center;font-size:14px;flex-shrink:0}.menu-identity>div{min-width:0}.menu-identity strong{display:block;font-weight:500;font-size:13px;overflow-wrap:anywhere}.menu-identity small{font-size:10px;display:block;margin-top:3px;color:var(--sub)}.account-menu>button{width:100%;border:0;background:transparent;padding:11px 10px;display:flex;align-items:center;gap:11px;text-align:left;font-size:12px;border-radius:6px;color:var(--ink)}.account-menu>button svg{width:16px;height:16px;color:var(--sub)}.account-menu>button>span{margin-left:auto;color:var(--sub)}.account-menu>button:hover,.account-menu>button:focus-visible{background:var(--soft)}.menu-divider{height:1px;background:var(--line);margin:5px 3px}.login-dialog{width:min(760px,calc(100% - 32px))}.login-layout{display:grid;grid-template-columns:.9fr 1.1fr}.login-art{background:var(--brand-soft);padding:30px;display:flex;flex-direction:column;border-right:1px solid var(--brand-border);color:var(--green);position:relative;overflow:hidden}.login-brand{display:flex;gap:10px;align-items:center;font-size:17px;font-weight:600;letter-spacing:2px}.login-brand svg{width:25px;height:25px}.login-illustration{position:relative;display:grid;place-items:center;min-height:205px;margin:6px 0}.art-book{position:relative;width:110px;height:148px;background:var(--action-bg);color:var(--action-text);border-radius:3px 10px 10px 3px;box-shadow:inset 5px 0 0 #0002,8px 10px 0 var(--brand-border);transform:rotate(-10deg);padding:23px 20px;z-index:1;display:flex;flex-direction:column;justify-content:space-between}.art-book>span{font-family:Georgia,serif;letter-spacing:1px;font-size:13px;line-height:1.6}.art-book>svg{width:22px;height:22px}.art-orbit{position:absolute;width:180px;height:180px;border:1px solid var(--brand-border);border-radius:50%;transform:rotate(20deg) scaleX(1.2)}.login-art h2{font-family:"Songti SC",serif;line-height:1.6;font-size:25px;font-weight:500;margin:0 0 12px}.login-art p{font-size:10px;line-height:1.9;margin:0;opacity:.8}.login-art>small{font-size:8px;letter-spacing:1.5px;margin-top:32px;opacity:.65}.login-fields{display:flex;flex-direction:column;justify-content:center;padding:40px 36px}.login-fields h2{font-size:28px;margin-top:14px}.login-fields .field-label{margin-top:24px}.login-benefit{display:flex;align-items:center;gap:6px;font-size:10px;color:var(--green);margin-top:13px}.login-benefit svg{width:13px;height:13px}.login-fields .primary{justify-content:space-between;padding:12px 17px;margin-top:24px}.login-separator{position:relative;text-align:center;margin:30px 0 3px;font-size:9px;color:var(--sub);border-top:1px solid var(--line)}.login-separator>span{position:relative;top:-8px;background:var(--surface);padding:0 9px}.login-fields .modal-note{margin-top:12px;font-size:9px}.profile-dialog{width:min(500px,calc(100% - 32px))}.profile-identity{display:flex;align-items:center;gap:16px;margin:26px 0 23px}.profile-avatar{width:56px;height:56px;display:grid;place-items:center;border-radius:50%;background:var(--brand-soft);color:var(--green);font-size:22px;flex-shrink:0}.profile-identity>div{min-width:0}.profile-identity strong{display:block;font-size:17px;font-weight:500;overflow-wrap:anywhere}.profile-identity small{display:block;margin-top:5px;font-size:10px;color:var(--sub)}.profile-stats{display:grid;grid-template-columns:repeat(3,1fr);padding:18px 0;background:var(--raised);border:1px solid var(--line);border-radius:9px;gap:10px}.profile-stats>div{text-align:center;border-right:1px solid var(--line)}.profile-stats>div:last-child{border:0}.profile-stats strong{display:block;font-family:Georgia,serif;font-size:24px;font-weight:400}.profile-stats span{display:block;margin-top:5px;font-size:10px;color:var(--sub)}.profile-caption{font-size:10px!important;color:var(--sub)}.profile-actions,.feedback-actions{display:flex;justify-content:flex-end;align-items:center;gap:10px;margin-top:23px}.profile-actions .primary,.feedback-actions .primary{margin:0}.feedback-dialog{width:min(510px,calc(100% - 32px))}.feedback-dialog textarea{resize:vertical;min-height:130px;line-height:1.8}.feedback-count{text-align:right;font-size:10px;color:var(--sub);margin-top:5px}.feedback-dialog .modal-note{font-size:10px}.profile-dialog .status,.feedback-dialog .status{font-size:11px}.top-actions{position:relative}
@media(max-width:650px){.login-layout{grid-template-columns:1fr}.login-art{display:none}.login-fields{padding:36px 25px 27px}.login-fields h2{font-size:26px}.login-dialog{width:min(420px,calc(100% - 28px))}.account-menu{top:calc(100% + 10px);width:220px}.user-avatar{width:34px;height:34px}.profile-dialog .modal-inner,.feedback-dialog .modal-inner{padding:29px 24px 24px}.profile-stats strong{font-size:22px}.profile-identity small{font-size:9px}}
.ai-service-button{display:inline-flex;align-items:center;gap:6px;font:inherit;font-size:10px;color:var(--green);background:var(--brand-soft);border:1px solid var(--brand-border);border-radius:5px;padding:6px 8px}.ai-service-button>span:first-child{width:5px;height:5px;border-radius:50%;background:var(--sub)}.ai-service-button>span.connected:first-child{background:var(--green)}.ai-config-state{font-size:12px;padding:13px;background:var(--raised);border:1px solid var(--line);border-radius:6px;line-height:1.8}.ai-progress{padding:12px 0 0}.ai-progress progress{display:block;width:100%;height:6px;accent-color:var(--green)}.ai-progress>span{display:block;font-size:10px;color:var(--sub);margin-top:9px;overflow-wrap:anywhere}.ai-map-theme{font-size:11px;font-weight:600;color:var(--green);padding:16px 10px 8px}.result-root{display:block;width:100%;text-align:left;color:var(--ink);border-top:0;border-right:0;border-bottom:0;cursor:pointer}.result-root:disabled{opacity:1;cursor:default}.result-root[aria-pressed=true]{background:var(--brand-soft);color:var(--green)}.ai-summary{white-space:pre-wrap}.ai-concepts{font-size:12px;color:var(--green)}#extract-panel ul{padding-left:20px}#extract-panel li{margin-bottom:8px}#cancel-ai{color:var(--sub);margin-top:12px}