:root{--bg:#f8f7f4;--paper:#fff;--ink:#292e2b;--muted:#747b75;--line:#e8e9e2;--brand:#a94c3b;--brand-dark:#8f3d2e;--green:#304f43;--serif:"Songti SC","Noto Serif CJK SC","SimSun",serif;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);font-size:16px;line-height:1.6;font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{opacity:.5;cursor:wait}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible{outline:3px solid #c78466;outline-offset:4px}button{border:0}button,a{transition:background .18s,color .18s,box-shadow .18s}h1,h2,h3,p{margin-top:0}h1{font-size:2.25rem;line-height:1.4;font-weight:600;letter-spacing:.03em}h2{font-size:1.35rem}h3{font-size:1.15rem}svg{width:22px;height:22px;flex-shrink:0;vertical-align:middle;fill:none;stroke:currentColor;stroke-width:1.65;stroke-linecap:round;stroke-linejoin:round}.initial{padding:4rem;text-align:center}.muted{color:var(--muted)}.eyebrow{font-size:.8rem;letter-spacing:.15em;font-weight:600;color:var(--brand);margin-bottom:12px}.brand{display:flex;gap:13px;align-items:center}.brand-mark{display:grid;place-items:center;width:42px;height:46px;border-radius:13px 4px 13px 4px;background:var(--brand);color:white;font:28px var(--serif)}.brand strong{display:block;font:600 22px var(--serif);letter-spacing:.08em}.brand small{display:block;color:var(--muted);font-size:12px;letter-spacing:.12em;margin-top:5px}.button{display:inline-flex;align-items:center;justify-content:center;gap:9px;border-radius:9px;min-height:48px;padding:10px 21px;background:var(--brand);color:white;font-weight:600;text-align:center}.button:hover{background:var(--brand-dark)}.button.secondary{background:#fff;color:var(--ink);border:1px solid var(--line)}.button.secondary:hover{background:#f4f3ef}.button.ghost{background:transparent;color:var(--muted);padding:8px 12px}.button.danger{background:#faece9;color:#a33329}.button.small{min-height:40px;padding:7px 13px;font-size:.9rem}.text-link{background:none;color:var(--brand);padding:0;font-size:.95rem}.wide{width:100%}.row{display:flex;align-items:center;gap:12px}.spread{display:flex;justify-content:space-between;align-items:center;gap:16px}.wrap{flex-wrap:wrap}.badge{display:inline-flex;align-items:center;gap:6px;border-radius:5px;background:#edf3ee;color:#40694b;padding:4px 9px;font-size:.8rem;white-space:nowrap}.badge.gray{background:#f1f1ee;color:#666}.badge.rose{background:#f7e9e4;color:var(--brand)}.badge svg{width:14px;height:14px}.error{background:#fff0ed;color:#a1372c;border-radius:8px;padding:12px 15px;font-size:.95rem}.notice{border:1px solid #e5d8bb;background:#fff9e9;color:#756238;padding:12px 16px;border-radius:8px;font-size:.875rem}.notice:empty{display:none}.empty{text-align:center;padding:65px 20px}.empty svg{width:45px;height:45px;color:#9baca1;margin-bottom:15px}.empty p{color:var(--muted)}label{display:block;font-size:.95rem;font-weight:500;margin:0 0 8px}input,select,textarea{display:block;background:#fff;border:1px solid #dcded6;border-radius:8px;min-height:50px;padding:11px 14px;width:100%;color:var(--ink);outline:none}input:focus,select:focus,textarea:focus{border-color:#b47866;box-shadow:0 0 0 3px #b4786614}input::placeholder,textarea::placeholder{color:#969a93}textarea{min-height:160px;resize:vertical;line-height:1.8}input[type=checkbox]{display:inline-block;width:20px;min-height:20px;accent-color:var(--brand);margin:0;flex-shrink:0}.field{margin-bottom:20px}.field small{display:block;margin-top:7px;color:var(--muted);font-size:.8rem}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}.form-grid .full{grid-column:1/-1}.check-label{display:flex;align-items:center;gap:12px;padding:12px 0;font-weight:400}.check-label small{display:block;color:var(--muted)}
.auth-page{min-height:100vh;display:grid;grid-template-columns:1fr 1fr}.auth-story{padding:48px 12%;background:#efeee7;display:flex;flex-direction:column;position:relative;overflow:hidden}.auth-story .brand{margin-bottom:70px}.auth-story h1{font-family:var(--serif);font-size:clamp(2.4rem,3.8vw,3.7rem);line-height:1.65;font-weight:500;z-index:1}.auth-story>p{color:#6c7468;font-size:1.1rem}.story-stamp{margin:auto 0 25px;border-left:2px solid #acb8a8;padding-left:22px;color:#5e6f5e;position:relative;z-index:1}.story-stamp p{margin-bottom:6px;font-family:var(--serif);font-size:1.5rem}.auth-art{position:absolute;right:-120px;bottom:-190px;width:530px;height:530px;border:1px solid #cbd2c4;border-radius:50%;box-shadow:0 0 0 50px #e3e6da,0 0 0 51px #cbd2c4,0 0 0 110px #e9ebdf,0 0 0 111px #d4d9ca;pointer-events:none}.auth-area{display:flex;align-items:center;justify-content:center;padding:45px 40px;background:white}.auth-box{width:100%;max-width:390px}.auth-box h1{margin-bottom:10px;font-size:1.85rem}.auth-box .lead{color:var(--muted);margin-bottom:30px}.auth-tabs{display:flex;gap:28px;border-bottom:1px solid var(--line);margin-bottom:28px}.auth-tabs button{background:none;color:var(--muted);padding:12px 0;border-bottom:2px solid transparent}.auth-tabs button.active{color:var(--brand);border-color:var(--brand);font-weight:600}.code-row{display:grid;grid-template-columns:1fr auto;gap:10px}.auth-bottom{margin:20px 0;text-align:center;color:var(--muted);font-size:.9rem}.demo-entry{border-top:1px solid var(--line);padding-top:22px;margin-top:28px}.demo-entry p{font-size:.8rem;color:var(--muted);margin-bottom:10px}.demo-entry .row{gap:8px;flex-wrap:wrap}.demo-entry button{font-size:.8rem;min-height:40px;background:#f6f5f2;border-radius:7px;color:#5e645e;padding:7px 12px}.auth-box .notice{margin-bottom:16px}.auth-mobile-brand{display:none}
.sidebar{width:232px;position:fixed;inset:0 auto 0 0;border-right:1px solid var(--line);padding:35px 25px;background:#fff;display:flex;flex-direction:column;z-index:15}.sidebar .brand{margin:0 0 58px 8px}.side-caption{font-size:.75rem;letter-spacing:.16em;color:#92978e;padding:0 16px;margin-bottom:14px}.nav-item{display:flex;align-items:center;gap:14px;padding:14px 16px;color:#747a73;border-radius:9px;margin-bottom:8px;font-size:.95rem}.nav-item.active{background:#f7ebe6;color:var(--brand);font-weight:600}.nav-item:hover{background:#f6f5f1}.nav-spacer{flex:1}.sidebar-foot{padding:20px 12px;border-top:1px solid var(--line);color:#8a9087;font-size:.78rem}.sidebar-foot p{margin-bottom:5px}.topbar{height:88px;margin-left:232px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 42px;background:#fff}.topbar .top-label{color:#787f75;font-size:.9rem}.topbar .top-label span{padding:0 14px;color:#c4c8bf}.topbar .row{font-size:.85rem;color:#737a70}.avatar{display:grid;place-items:center;width:36px;height:36px;background:#e9ede5;color:#526347;border-radius:50%;font-family:var(--serif)}.main{margin-left:232px;padding:38px 42px 65px;max-width:1640px}.page-heading{margin-bottom:28px}.page-heading h1{margin-bottom:8px}.page-heading p{margin-bottom:0;color:var(--muted);font-size:.95rem}.heading-number{font-family:var(--serif);font-size:2.5rem;color:#899587}.section-head{display:flex;justify-content:space-between;align-items:center;margin:30px 0 20px}.section-head h2{margin:0}.section-head span{color:var(--muted);font-size:.85rem}.welcome-strip{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:25px 30px;background:#eaf0e8;border:1px solid #dfe6db;border-radius:12px;margin-bottom:30px}.welcome-strip h2{font-family:var(--serif);font-weight:500;font-size:1.5rem;margin-bottom:5px;color:#354a36}.welcome-strip p{margin-bottom:0;color:#6c7c69;font-size:.9rem}.welcome-strip>svg{width:40px;height:40px;stroke-width:1;color:#71826b}.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:23px}.course-card{background:white;border:1px solid var(--line);border-radius:12px;overflow:hidden;display:block}.course-card:hover{box-shadow:0 12px 28px #283b2310}.cover{min-height:195px;padding:26px;position:relative;overflow:hidden;background:#f1e1db;color:#7e4336;display:flex;flex-direction:column;justify-content:space-between}.cover.sand{background:#eee7d7;color:#786039}.cover.blue{background:#dce8e7;color:#375c5a}.cover-tag{font-size:.7rem;letter-spacing:.16em;position:relative;z-index:1}.cover h3{font-family:var(--serif);font-size:1.85rem;font-weight:500;line-height:1.6;margin:19px 0 5px;position:relative;z-index:1;max-width:85%}.cover small{font-size:.8rem;position:relative;z-index:1}.cover-number{position:absolute;right:8px;bottom:-44px;font:170px var(--serif);opacity:.08;letter-spacing:-.12em}.card-body{padding:23px}.card-body h3{margin-bottom:7px}.card-body>p{color:var(--muted);font-size:.85rem;margin-bottom:23px;min-height:28px}.card-body .spread{padding-top:17px;border-top:1px solid var(--line);font-size:.85rem;color:#767f71}.card-body .card-action{color:var(--brand);display:flex;gap:6px;align-items:center}.card-action svg{width:17px;height:17px}.subtle-note{margin-top:35px;padding-top:20px;border-top:1px solid var(--line);color:#8a8f86;font-size:.82rem;display:flex;gap:9px}.subtle-note svg{width:18px;height:18px}.mobile-nav{display:none}.demo-banner{background:#fff6dc;padding:8px 18px;border:1px solid #efe3bd;border-radius:8px;font-size:.78rem;color:#826e3e;margin-bottom:24px;display:flex;justify-content:space-between;align-items:center;gap:12px}.demo-banner button{background:none;color:#826e3e;font-size:inherit;text-decoration:underline;padding:3px}.back{display:inline-flex;gap:6px;align-items:center;color:var(--muted);font-size:.9rem;margin-bottom:24px}.back svg{width:18px;height:18px}.course-detail{display:grid;grid-template-columns:300px 1fr;gap:35px;background:white;padding:28px;border-radius:12px;border:1px solid var(--line)}.course-detail .cover{border-radius:9px;min-height:230px}.course-detail h1{font-size:1.85rem;margin:12px 0}.course-description{color:var(--muted);line-height:1.9;margin-bottom:18px;white-space:pre-line}.lesson-list{background:white;border:1px solid var(--line);border-radius:12px;overflow:hidden}.lesson-row{display:flex;align-items:center;gap:18px;padding:23px 25px;border-bottom:1px solid var(--line)}.lesson-row:last-child{border:0}.lesson-row:hover{background:#faf9f6}.lesson-index{color:#929b8d;font:1.25rem var(--serif);min-width:24px}.type-icon{width:44px;height:44px;background:#f3eee8;border-radius:9px;display:grid;place-items:center;color:#9e6c51}.lesson-info{flex:1;min-width:0}.lesson-info strong{font-weight:500;display:block}.lesson-info small{font-size:.8rem;color:var(--muted)}.lesson-arrow{color:#a0a797}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:25px}.lesson-content{background:white;border:1px solid var(--line);border-radius:12px;padding:32px;min-width:0}.lesson-content h1{font-size:1.8rem}.article-body{font-size:1.1rem;line-height:2.1;white-space:pre-wrap;overflow-wrap:anywhere;margin:30px 0 20px}.lesson-aside{align-self:start}.lesson-aside h3{margin:0;padding:20px;border-bottom:1px solid var(--line)}.lesson-aside .lesson-row{padding:18px 16px;gap:12px;font-size:.9rem}.lesson-aside .lesson-row.current{background:#f8eeea;color:var(--brand)}video{width:100%;background:#16221e;border-radius:9px;max-height:60vh}audio{width:100%;margin-top:22px}.audio-panel{padding:45px 25px;background:#e7eeea;border-radius:10px;text-align:center;margin:25px 0}.audio-panel .audio-mark{margin:0 auto 24px;width:88px;height:88px;border-radius:50%;background:#395e51;color:white;display:grid;place-items:center;box-shadow:0 0 0 14px #395e510b}.audio-mark svg{width:34px;height:34px}.audio-panel p{color:#63796e;font-size:.9rem}.panel{background:white;padding:28px;border:1px solid var(--line);border-radius:12px;margin-bottom:22px}.account-grid{display:grid;grid-template-columns:1fr 1fr;gap:25px;align-items:start}.account-row{padding:17px 0;border-bottom:1px solid var(--line)}.account-row:last-child{border:0}.account-row span{color:var(--muted)}.account-row strong{font-weight:500}.admin-tabs{display:flex;gap:25px;border-bottom:1px solid var(--line);margin-bottom:25px}.admin-tabs a{padding:11px 0;color:var(--muted);border-bottom:2px solid transparent}.admin-tabs a.active{color:var(--brand);border-color:var(--brand)}.search-row{display:flex;gap:12px;margin-bottom:24px;align-items:center}.search-row input{max-width:320px}.user-list{display:grid;gap:15px}.user-card{background:white;border:1px solid var(--line);border-radius:11px;padding:22px}.user-card .spread{align-items:start}.user-card h3{margin:0 0 7px;font-size:1.05rem}.user-card .tags{display:flex;flex-wrap:wrap;gap:7px;margin:16px 0}.user-meta{font-size:.8rem;color:var(--muted)}.user-actions{display:flex;gap:12px;border-top:1px solid var(--line);padding-top:15px}.admin-course{background:white;border:1px solid var(--line);border-radius:12px;padding:24px;margin-bottom:18px}.admin-course h3{margin:0 0 6px}.admin-course .lesson-row{padding:16px 0}.admin-course .lesson-list{border:0;margin-top:15px;border-top:1px solid var(--line);border-radius:0}.admin-course .lesson-row .button{margin-left:auto}.admin-course .add-lesson{margin-top:15px}.audit-row{padding:17px 0;border-bottom:1px solid var(--line);overflow-wrap:anywhere}.audit-row p{margin:5px 0}.audit-row small{color:var(--muted)}#toast{position:fixed;bottom:35px;left:50%;transform:translateX(-50%);background:#2d4138;color:white;padding:13px 23px;border-radius:9px;z-index:100;box-shadow:0 8px 25px #0002;max-width:90vw;display:none}dialog{border:1px solid var(--line);border-radius:15px;padding:30px;width:600px;max-width:calc(100% - 30px);max-height:90dvh;color:var(--ink);box-shadow:0 20px 80px #0003}dialog::backdrop{background:#1e2d2760;backdrop-filter:blur(3px)}.dialog-head{margin-bottom:23px;display:flex;justify-content:space-between;gap:16px;align-items:center}.dialog-head h2{margin:0}.dialog-close{background:#f3f3ef;border-radius:50%;width:36px;height:36px;color:#666}.dialog-actions{display:flex;gap:12px;justify-content:flex-end;margin-top:25px;border-top:1px solid var(--line);padding-top:22px}.grant-options{margin-top:20px}.grant-options .check-label{padding:16px;border:1px solid var(--line);border-radius:8px;margin-bottom:9px}.upload-note{margin-top:12px;font-size:.8rem;color:var(--muted)}[hidden]{display:none!important}
@media(min-width:1600px){.main{margin-right:auto}.course-grid{gap:30px}.cover{min-height:240px}}
@media(max-width:1150px){.sidebar{width:205px;padding:30px 16px}.topbar,.main{margin-left:205px}.main{padding:30px 26px}.topbar{padding:0 26px}.course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.lesson-layout{grid-template-columns:minmax(0,1fr) 230px}.course-detail{grid-template-columns:230px 1fr;gap:25px}.auth-story{padding:40px 9%}}
@media(max-width:760px){h1{font-size:1.8rem}.sidebar{display:none}.topbar{margin:0;height:72px;padding:0 20px}.topbar .top-label{font:600 20px var(--serif);color:var(--ink)}.topbar .top-label span,.topbar .top-label small{display:none}.topbar .row>span:not(.avatar){display:none}.main{margin:0;padding:25px 20px 110px}.page-heading{margin-bottom:24px}.page-heading p{font-size:.9rem}.page-heading h1{font-size:1.8rem}.heading-number{font-size:2rem}.welcome-strip{padding:20px;gap:12px}.welcome-strip h2{font-size:1.25rem}.welcome-strip p{font-size:.85rem}.welcome-strip>svg{width:30px;height:30px}.course-grid{gap:20px}.cover{padding:22px;min-height:190px}.cover h3{font-size:1.6rem}.card-body{padding:20px}.mobile-nav{display:flex;position:fixed;bottom:0;left:0;right:0;background:#fffc;border-top:1px solid var(--line);backdrop-filter:blur(14px);padding:8px 12px max(10px,env(safe-area-inset-bottom));z-index:20}.mobile-nav a{flex:1;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:3px;font-size:.75rem;color:#82887d;min-height:48px}.mobile-nav a.active{color:var(--brand)}.course-detail{grid-template-columns:1fr;padding:20px;gap:18px}.course-detail .cover{min-height:190px}.course-detail h1{font-size:1.6rem;margin-top:10px}.lesson-layout{grid-template-columns:1fr}.lesson-content{padding:22px}.lesson-content h1{font-size:1.55rem}.lesson-row{padding:20px 17px;gap:13px}.lesson-info strong{font-size:1rem}.account-grid{grid-template-columns:1fr;gap:0}.panel{padding:23px}.auth-page{display:block;min-height:100dvh;background:#fff}.auth-story{display:none}.auth-mobile-brand{display:block;margin-bottom:45px}.auth-area{padding:35px 25px 50px;min-height:100dvh}.auth-box{max-width:430px}.auth-box h1{font-size:1.8rem}.demo-banner{font-size:.75rem;align-items:flex-start}.demo-banner button{white-space:nowrap}.search-row{align-items:stretch;flex-wrap:wrap}.search-row input{max-width:100%;flex:1;min-width:170px}.admin-course{padding:20px}.admin-course>.spread{flex-wrap:wrap}.user-actions{flex-wrap:wrap}.admin-course .lesson-row{flex-wrap:wrap}.admin-course .lesson-info{flex-basis:55%}dialog{padding:22px}.form-grid{grid-template-columns:1fr}.form-grid .full{grid-column:auto}#toast{bottom:95px}.subtle-note{font-size:.8rem}.article-body{font-size:1.1rem}.auth-art{display:none}}
@media(max-width:520px){.course-grid{grid-template-columns:1fr}.cover{min-height:185px}.cover h3{font-size:1.95rem}.cover-number{font-size:170px}.section-head{margin-top:25px}.spread.page-heading{align-items:flex-start}.user-card .spread{flex-wrap:wrap}.row.wrap{gap:8px}}
.editor-dialog{width:860px}.editor-dialog .dialog-head .eyebrow{margin-bottom:7px}.editor-block{border:1px solid var(--line);background:#fafaf7;border-radius:10px;padding:19px;margin:18px 0}.block-head{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:14px}.block-head button{background:white;border:1px solid var(--line);border-radius:5px;min-width:38px;min-height:38px;margin-left:5px;color:var(--muted)}.block-toolbar{display:flex;gap:9px;flex-wrap:wrap;position:sticky;bottom:-22px;padding:14px 0;background:white;border-top:1px solid var(--line);z-index:1}.editor-meta{margin-top:20px}.block-upload{margin:15px 0}.block-upload small{color:var(--muted)}.content-image{margin:28px 0}.content-image img{display:block;max-width:100%;height:auto;border-radius:8px;margin:auto}.content-image figcaption{font-size:.9rem;color:var(--muted);text-align:center;margin-top:10px}.content-media{margin:28px 0}.content-text{margin:20px 0}.course-type-label{font-size:.85rem;color:var(--muted);margin-right:12px}.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}.editor-actions{flex-wrap:wrap}.admin-course .lesson-row .button{margin-left:0}.lesson-content{overflow-wrap:anywhere}
@media(max-width:520px){.editor-dialog{padding:18px}.editor-block{padding:14px}.editor-actions .button{width:100%}.block-head{align-items:flex-start}.block-head strong{flex:1}.block-head button{font-size:.85rem}.block-toolbar .button{flex:1;white-space:nowrap}.admin-course .lesson-row .lesson-info{flex-basis:60%}.content-image{margin:20px 0}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
/* Full-page authoring: one document scroll, persistent actions, no editing dialogs. */
.authoring{max-width:1320px;padding-bottom:85px}.author-heading{margin-bottom:30px}.author-heading h1{margin-bottom:8px}.author-heading p:last-child{margin-bottom:0}.author-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:26px;align-items:start}.author-main,.author-aside{min-width:0}.authoring .panel{padding:28px;margin-bottom:24px}.authoring .panel h2{font-size:1.15rem;margin-bottom:24px}.step-number{display:inline-grid;place-items:center;background:#f2eee8;color:#926c56;width:29px;height:29px;font-size:.78rem;border-radius:7px;margin-right:10px;vertical-align:middle}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:16px}.authoring .section-heading h2{margin:0}.section-heading>.muted{font-size:.8rem}.author-aside .cover{padding:20px;min-height:215px;border-radius:8px;overflow-wrap:anywhere}.author-aside .cover h3{max-width:100%;font-size:1.55rem}.cover-setting{margin:20px 0 0}.workspace-empty{padding:28px 18px;text-align:center;background:#faf9f6;border:1px dashed #dddcd2;border-radius:10px;margin:18px 0}.workspace-empty p{font-size:.875rem;color:var(--muted);margin:8px 0 0}.workspace-lessons{margin-bottom:18px}.workspace-lesson{display:flex;align-items:center;gap:14px;border-bottom:1px solid var(--line);padding:19px 0}.workspace-lesson:hover{color:var(--brand)}.workspace-lesson>span:nth-child(2){flex:1;min-width:0;overflow-wrap:anywhere}.workspace-lesson strong{font-size:.95rem;font-weight:500}.workspace-lesson small{display:block;color:var(--muted);font-size:.8rem;margin-top:5px}.workspace-lesson>span:last-child{font-size:.8rem;white-space:nowrap}.author-savebar{position:fixed;left:232px;right:0;bottom:0;z-index:25;background:#fffffffa;border-top:1px solid var(--line);box-shadow:0 -6px 25px #263b2307;padding:16px 42px;display:flex;align-items:center;justify-content:space-between;gap:16px}.author-savebar>span{font-size:.85rem;color:var(--muted)}.author-savebar>div{display:flex;gap:10px;flex-wrap:wrap}.authoring~*{min-width:0}.authoring .editor-block{margin:22px 0;background:#fff;padding:23px;scroll-margin:28px}.authoring .editor-block:focus{outline:2px solid #d7b49f;outline-offset:3px}.authoring .editor-block textarea{min-height:230px;background:#fdfcf9;line-height:1.95}.authoring .block-head{margin-bottom:20px}.authoring .block-head strong{font-size:.95rem}.authoring .block-head button{min-width:42px;min-height:42px}.content-palette{display:flex;gap:10px;flex-wrap:wrap;padding:16px 0}.content-palette .button{font-weight:500}.content-workspace>.content-palette{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.content-workspace>.upload-note{margin-bottom:10px}.block-outline{display:grid;gap:6px;max-height:450px;overflow:auto}.block-outline button{text-align:left;background:#f8f7f3;border-radius:7px;display:grid;grid-template-columns:27px 1fr;gap:1px 8px;padding:12px;color:var(--ink);min-height:56px}.block-outline button:hover{background:#f3e8e1}.block-outline button>span{color:#a28a79;font-size:.8rem;grid-row:1/3}.block-outline strong{font-size:.9rem;font-weight:500}.block-outline small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--muted);font-size:.75rem}.insert-block{border-top:1px dashed var(--line);margin-top:20px;padding-top:12px}.insert-block summary{color:var(--muted);font-size:.8rem;cursor:pointer;padding:8px 0;min-height:40px}.insert-block[open] summary{color:var(--brand)}.undo-notice{background:#edf3ee;padding:13px;border-radius:8px;font-size:.9rem}.undo-notice button{margin-left:12px}.authoring .block-upload{background:#f8f7f4;border-radius:8px;padding:16px}.authoring input[type=file]{font-size:.8rem;padding:10px;min-width:0}.authoring .block-upload small{display:block;margin-top:7px;font-size:.75rem}.editor-error{scroll-margin:25px}.authoring .cover small{white-space:pre-wrap}.authoring .field:last-child{margin-bottom:0}body:has(.authoring) #toast{bottom:100px}
@media(min-width:1250px){.lesson-author-grid .author-aside{position:sticky;top:24px}}
@media(max-width:1150px){.author-savebar{left:205px;padding:16px 26px}.author-grid{grid-template-columns:minmax(0,1fr) 260px;gap:20px}.authoring .panel{padding:22px}.author-savebar>span{max-width:190px}}
@media(max-width:1000px){.author-grid{grid-template-columns:1fr}.author-aside{display:grid;grid-template-columns:1fr 1fr;gap:20px}.author-aside .panel{margin:0}.author-savebar{align-items:flex-start}.author-savebar>span{font-size:.75rem;max-width:130px}.block-outline{max-height:240px}}
@media(max-width:760px){body:has(.authoring) .mobile-nav{display:none}.authoring{padding-bottom:105px}.authoring .back{margin-bottom:20px}.author-heading{margin-bottom:22px}.author-heading h1{font-size:1.8rem}.author-heading p{font-size:.9rem}.author-savebar{left:0;padding:11px 20px max(12px,env(safe-area-inset-bottom));display:block}.author-savebar>span{display:block;max-width:none;margin-bottom:8px}.author-savebar>div{display:flex;gap:8px}.author-savebar .button{flex:1;font-size:.85rem;padding:10px;min-height:46px;white-space:nowrap}.authoring .panel{padding:21px}.authoring .editor-block{padding:17px}.authoring .block-head button{margin-left:4px;font-size:.8rem;min-width:38px}.authoring .block-head strong{white-space:nowrap}.authoring .step-number{width:25px;height:25px;margin-right:7px}.authoring .form-grid{grid-template-columns:1fr}.authoring .form-grid .field:last-child{margin-bottom:20px}body:has(.authoring) #toast{bottom:118px}.main:has(.authoring){padding-bottom:30px}}
@media(max-width:520px){.author-aside{display:block}.author-aside .panel{margin-bottom:20px}.authoring .content-workspace{padding:17px}.authoring .editor-block{padding:13px}.authoring .editor-block textarea{min-height:250px}.content-palette{gap:8px}.content-palette .button{flex:1 1 calc(50% - 8px)}.authoring .block-head{gap:7px;flex-wrap:wrap}.authoring .block-upload{padding:10px}.author-savebar{padding-left:14px;padding-right:14px}.author-savebar .button{font-size:.8rem;gap:4px}.authoring .workspace-lesson{gap:10px}.authoring .section-heading{flex-wrap:wrap}.authoring .block-head button{min-height:42px}.authoring .cover h3{font-size:1.7rem}.authoring .back{overflow-wrap:anywhere}}
.leave-editor{position:fixed;z-index:40;top:16px;left:calc(232px + 32px);right:32px;max-width:1150px;background:#fff9e9;border:1px solid #dfc595;box-shadow:0 8px 30px #4c3d2025;border-radius:12px;padding:20px 24px;display:flex;align-items:center;justify-content:space-between;gap:20px}.leave-editor p{font-size:.85rem;color:#756238;margin:5px 0 0}.leave-editor>div:last-child{display:flex;gap:10px;flex-shrink:0}@media(max-width:1150px){.leave-editor{left:225px;right:20px;flex-wrap:wrap}}@media(max-width:760px){.leave-editor{left:12px;right:12px;top:12px;padding:18px}.leave-editor>div:last-child{width:100%;flex-wrap:wrap}.leave-editor .button{flex:1;font-size:.85rem}}
.mobile-content-outline{display:none}@media(max-width:1000px){.mobile-content-outline{display:block;background:white;border:1px solid var(--line);border-radius:10px;margin:0 0 22px;padding:15px 20px}.mobile-content-outline summary{cursor:pointer;font-size:.9rem;color:var(--green);min-height:30px}.mobile-content-outline[open] summary{margin-bottom:14px}.lesson-author-grid .author-aside{display:block}.lesson-author-grid .author-aside>.panel:first-child{display:none}.lesson-author-grid .author-aside>.panel{margin-bottom:20px}}
/* Course content is free-form; publication and editing are separate actions. */
.formatted-text{white-space:normal}.formatted-text p{white-space:pre-wrap;margin:0 0 12px}.formatted-text h2,.formatted-text h3,.formatted-text h4{line-height:1.6;margin:24px 0 12px}.formatted-text li{margin:6px 0;white-space:pre-wrap}.text-tools{display:flex;gap:8px;margin-bottom:10px}.text-tools button,.lesson-order button{border:1px solid var(--line);border-radius:6px;background:white;min-height:42px;padding:6px 13px;color:var(--green)}.text-tools button:hover,.lesson-order button:hover{background:#eef2ec}.selected-asset{padding:12px;background:#faf9f6;border-radius:9px;overflow-wrap:anywhere}.selected-asset>strong{font-size:.85rem;display:block;margin-bottom:9px}.selected-asset video{max-height:220px}.selected-asset audio{margin:8px 0 0}.asset-preview{max-height:170px;max-width:100%;display:block;border-radius:6px}.media-picker{border:1px solid var(--line);border-radius:8px;padding:12px;margin:10px 0}.media-picker summary{cursor:pointer;color:var(--brand);min-height:36px;font-size:.9rem}.media-picker input{margin:9px 0}.media-results{display:grid;gap:8px;max-height:280px;overflow:auto}.media-results button{display:flex;gap:12px;align-items:center;text-align:left;border:1px solid var(--line);border-radius:7px;background:#fff;padding:12px;min-height:62px;overflow-wrap:anywhere;color:var(--ink)}.media-results button:hover{background:#f4eee7}.media-results button>span{min-width:0;font-size:.85rem}.media-results small{display:block;color:var(--muted);margin-top:4px}.media-results img{width:58px;height:48px;object-fit:cover;border-radius:5px;flex-shrink:0}.workspace-lesson-wrap{border-bottom:1px solid var(--line);padding-bottom:14px}.workspace-lesson-wrap .workspace-lesson{border:0}.lesson-order{display:flex;gap:8px;justify-content:flex-end}.recovery p{margin:6px 0 12px}.course-filters{display:grid;grid-template-columns:minmax(180px,1fr) 170px;gap:12px;margin-bottom:22px}.playback-resume{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:12px 0;font-size:.9rem;color:var(--green);background:#edf3ee;padding:12px;border-radius:8px}.lesson-next{display:flex;gap:12px;justify-content:space-between;margin-top:28px;flex-wrap:wrap}.lesson-next .button{font-size:.85rem;flex:1;min-width:130px}.editor-error a{margin-top:12px}.workspace-lesson small{line-height:1.7}@media(max-width:520px){.course-filters{grid-template-columns:1fr}.playback-resume{flex-wrap:wrap}.media-results button{padding:10px}.authoring .selected-asset audio{min-width:0;width:100%}.authoring .text-tools{flex-wrap:wrap}.authoring .text-tools button{font-size:.85rem;padding:7px 11px}}

.section-head > .button{white-space:nowrap;flex-shrink:0}
.admin-page-heading{align-items:flex-start}.admin-heading-actions{display:flex;align-items:center;gap:14px;flex-shrink:0}.admin-heading-actions .button{white-space:nowrap}
@media(max-width:600px){.admin-page-heading{flex-direction:column;gap:18px}.admin-heading-actions{width:100%}.admin-heading-actions>.badge{display:none}.admin-heading-actions>.button{width:100%}}