:root{--primary:#165C45;--primary-dark:#0E4432;--background:#F3F6F5;--surface:#FFFFFF;--text:#172D26;--muted:#64776E;--border:#DEE8E2;--accent:#DCEB91;--danger:#A52A35;--radius:12px;font-family:"PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:var(--background);font-synthesis:none}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:var(--background)}body{font-size:14px;line-height:1.6}button,input,textarea,select{font:inherit;color:inherit}button{border:1px solid var(--border);background:var(--surface);border-radius:8px;padding:8px 14px;cursor:pointer}button:hover{border-color:var(--primary);color:var(--primary)}button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid rgba(22,92,69,.2)}.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:12px;background:#fff;padding:8px}.shell{display:flex;min-height:100vh}.sidebar{width:236px;flex:0 0 236px;background:var(--primary);color:#fff;padding:28px 18px 18px;display:flex;flex-direction:column}.brand{font-size:28px;font-weight:800;padding:0 14px 30px}.brand small{display:block;font-size:12px;font-weight:400;opacity:.72}.nav{display:grid;gap:6px}.nav button{border:0;background:transparent;color:rgba(255,255,255,.72);text-align:left;padding:11px 14px;border-radius:8px}.nav button:hover,.nav button[aria-current="page"]{background:rgba(255,255,255,.14);color:#fff}.side-foot{margin-top:auto;padding:18px 14px 4px;border-top:1px solid rgba(255,255,255,.16);font-size:13px;color:rgba(255,255,255,.72)}.side-foot button{border:0;background:transparent;color:inherit;padding:6px 0}.workspace{width:100%;max-width:1500px;padding:38px 48px 60px;min-width:0}.topbar{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:28px}.topbar h1{font-size:30px;line-height:1.2;margin:5px 0 4px}.eyebrow{font-size:12px;color:var(--primary);font-weight:700;letter-spacing:.08em}.muted{color:var(--muted);margin:0}.lead{display:flex;justify-content:space-between;align-items:center;gap:24px;background:var(--primary);color:#fff;border-radius:var(--radius);padding:28px 32px;margin-bottom:22px}.lead h2{margin:0 0 5px;font-size:22px}.lead p{margin:0;color:rgba(255,255,255,.75)}.book{min-width:190px;text-align:right;font-size:22px;font-weight:700}.book small{font-size:10px;letter-spacing:.16em;color:var(--accent)}.metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.metric{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px 22px}.metric span{display:block}.metric strong{display:block;font-size:30px;margin-top:5px}.toolbar{display:flex;align-items:center;gap:14px;margin:-8px 0 16px}.toolbar input{max-width:390px}.table-frame{overflow:auto;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius)}table{width:100%;border-collapse:collapse;min-width:700px}th,td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--border);vertical-align:top}th{font-size:12px;color:var(--muted);font-weight:600;background:#F8FAF9;white-space:nowrap}tbody tr:last-child td{border-bottom:0}.stem{max-width:680px}.stem b{color:var(--primary)}td small{display:block;color:var(--muted);margin-top:4px}.badge{display:inline-block;padding:3px 9px;border-radius:99px;background:#EEF5F1;color:var(--primary);font-size:12px}.actions{white-space:nowrap}.actions button+button{margin-left:7px}.primary{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:600}.primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);color:#fff}.login{min-height:100vh;display:grid;grid-template-columns:1.1fr .9fr;background:var(--surface)}.login-story{background:var(--primary);color:#fff;padding:12vw 10vw}.login-story h1{font-size:64px;margin:0 0 12px}.login-story p{font-size:20px;color:rgba(255,255,255,.75)}.login-form{align-self:center;max-width:430px;width:100%;padding:48px;margin:auto}.login-form h2{font-size:28px;margin:0 0 8px}.field{display:grid;gap:6px;margin:16px 0}.field label{font-size:13px;font-weight:600}.field input,.field textarea,.field select,.toolbar input{width:100%;border:1px solid var(--border);background:#fff;border-radius:8px;padding:10px 12px}.field textarea{min-height:96px;resize:vertical}.field-error{color:var(--danger);min-height:20px}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 18px}.full{grid-column:1/-1}.inline{display:flex!important;align-items:center;gap:8px;font-weight:400!important}.inline input{width:auto}.dialog-head{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;border-bottom:1px solid var(--border)}.dialog-head h2{margin:0}.dialog-body{padding:4px 24px 0}.dialog-footer{display:flex;justify-content:flex-end;gap:10px;padding:18px 0 22px}.error{background:#FFF1F1;border:1px solid #F0C6C6;color:var(--danger);padding:15px;border-radius:8px}.state{text-align:center;color:var(--muted);padding:32px}.hint{color:var(--muted);background:#EEF5F1;padding:12px 14px;border-radius:8px;margin:0 0 16px}.option-editor{display:grid;gap:10px}.option-row{display:grid;grid-template-columns:34px minmax(0,1fr) auto;align-items:start;gap:10px}.option-letter{display:grid;place-items:center;width:30px;height:30px;border:1px solid var(--border);border-radius:50%;color:var(--primary);font-weight:700;margin-top:5px}.option-row textarea{min-height:42px}.answer-radio{display:flex;align-items:center;gap:5px;white-space:nowrap;font-size:13px;color:var(--muted);margin-top:9px}.answer-radio input{accent-color:var(--primary)}dialog{border:0;border-radius:12px;padding:0;width:min(820px,calc(100vw - 32px));max-height:90vh;box-shadow:0 18px 60px rgba(23,45,38,.25)}dialog::backdrop{background:rgba(23,45,38,.35)}code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;color:var(--primary)}
@media(max-width:800px){.sidebar{width:190px;flex-basis:190px;padding:22px 12px}.workspace{padding:26px 20px}.metrics{grid-template-columns:repeat(2,minmax(0,1fr))}.lead{align-items:flex-start;flex-direction:column}.book{text-align:left}.login{grid-template-columns:1fr}.login-story{padding:48px 32px}.login-story h1{font-size:44px}.login-form{padding:36px 24px}.topbar{flex-direction:column}.grid{grid-template-columns:1fr}.full{grid-column:auto}}
@media(max-width:560px){.shell{display:block}.sidebar{width:100%;padding:16px}.brand{padding:0 8px 14px}.nav{display:flex;overflow:auto}.nav button{white-space:nowrap}.side-foot{display:none}.workspace{padding:24px 14px}.metrics{gap:10px}.metric{padding:14px}.metric strong{font-size:24px}.toolbar{display:block}.toolbar input{margin-bottom:10px}.option-row{grid-template-columns:30px minmax(0,1fr)}.answer-radio{grid-column:2;margin-top:-3px}.option-letter{width:28px;height:28px}}
[hidden]{display:none!important}
.button-row{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin:16px 0}
button.danger{color:#a62828;border:1px solid #a62828;background:#fff}
button:disabled{opacity:.5;cursor:not-allowed}
.import-status{white-space:pre-wrap;overflow-wrap:anywhere;padding:16px;margin:16px 0;border:1px solid #b5cabc;border-radius:8px;background:#f2f8f4;max-height:320px;overflow:auto}
.import-status:empty{display:none}
.import-status[data-kind=error]{border-color:#d39d9d;background:#fff2f2;color:#992525}
#notice:not(:empty){position:fixed;bottom:24px;left:50%;transform:translateX(-50%);z-index:1000;background:#213e33;color:white;padding:14px 22px;border-radius:8px;max-width:90vw;box-shadow:0 6px 24px #0003}
.grid{align-items:start}.question-preview{background:#f3f6f5;padding:20px;max-width:415px;margin:auto;font-size:16px;line-height:1.65;color:#172d26}.preview-card{background:white;border:1px solid #dee8e2;border-radius:10px;padding:14px;margin-bottom:12px}.preview-text{white-space:pre-wrap;overflow-wrap:anywhere}.preview-blank{color:#9a4b15;font-weight:700;background:#fff3dd;border-radius:3px;padding:0 2px}.preview-media{display:block;width:100%;height:auto;cursor:zoom-in;margin:10px 0}.preview-options{display:grid;gap:8px}.preview-option{display:flex;align-items:center;gap:10px;background:white;border:1px solid #dee8e2;border-radius:8px;padding:12px;text-align:left;cursor:pointer;min-height:54px}.preview-option.selected{background:#edf4ef;border-color:#165c45;box-shadow:0 0 0 1px #165c45 inset}.preview-letter{display:grid;place-items:center;flex:none;width:24px;height:24px;border:1px solid #a9bab0;border-radius:50%;color:#165c45}.preview-option.selected .preview-letter{background:#165c45;color:white}.preview-option-content{flex:1;min-width:0}.preview-option .preview-media{max-width:210px}.preview-material{background:#f5f8f6;padding:10px;margin-bottom:12px}.preview-table{overflow-x:auto;margin-bottom:12px}.preview-table table{width:max-content;min-width:100%}.preview-table td{padding:8px;border:1px solid #d5e1d9;white-space:nowrap}#preview{max-width:520px;width:calc(100vw - 30px)}#image-viewer{max-width:96vw;width:max-content;padding:12px}#image-viewer img{display:block;max-width:90vw;max-height:82vh;object-fit:contain}.editor-image{max-width:100%;max-height:180px;object-fit:contain;margin-top:6px}.media-editor{font-size:12px;min-height:50px}.preview-footer{margin-top:12px;color:#64776e;font-size:13px}

.analysis-image{display:inline-block;vertical-align:middle;max-width:100%;height:auto;margin:4px;cursor:zoom-in}

/* Keep navigation available while reviewing long question lists. */
.sidebar{position:sticky;top:0;height:100vh;height:100dvh;align-self:flex-start;overflow-y:auto;overscroll-behavior:contain}
.sidebar .brand,.sidebar .nav,.sidebar .side-foot{flex-shrink:0}
@media(max-width:560px){.sidebar{height:auto;max-height:50vh;max-height:50dvh;z-index:20}}

.preview-material h3{margin:0 0 12px;font-size:15px;color:#165c45}.preview-material{margin-bottom:18px}.preview-material .preview-media{margin:12px 0}

.source-issues{padding:12px;border:1px solid #e2c28b;border-radius:8px;background:#fff9ee;color:#734715;min-width:230px}.source-issues ul,.source-warnings ul{margin:8px 0;padding-left:22px;max-height:260px;overflow:auto}.source-issues li,.source-warnings li{margin:6px 0;overflow-wrap:anywhere}.source-warnings{margin-top:10px}.source-warnings summary{cursor:pointer}.review-link{padding:4px 8px;color:#165c45;text-decoration:underline}

#source-list table{min-width:1000px}#source-list td:first-child{min-width:150px}#source-list td:nth-child(3){min-width:70px}#source-list td:last-child{min-width:100px}

.editor-media-previews{display:flex;flex-wrap:wrap;gap:12px}.editor-media-card{display:flex;flex-direction:column;align-items:flex-start;gap:8px;padding:12px;border:1px solid #d7e2dc;border-radius:10px;background:#f8faf7;max-width:100%}.editor-media-card img{display:block;max-width:220px;max-height:160px;object-fit:contain;min-width:36px;min-height:36px;background:#fff}.editor-media-card a{display:block}.editor-media-card button{color:#a52a35}

#preview .dialog-head{position:sticky;top:0;z-index:2;background:#fff;flex-wrap:wrap;gap:12px}#preview .dialog-head .button-row{flex-wrap:wrap}.preview-publish-error{position:sticky;top:76px;z-index:1;margin:0;padding:12px 20px;background:#fff1ec;color:#a52a35;border-bottom:1px solid #e5b9aa}