/* The grammar workbook follows the portal's warm paper and terracotta palette. */
.grammar-page{--grammar-green:#3e725b;--grammar-soft-green:#edf5ef;--grammar-paper:var(--panel,#fffdf9);--grammar-line:var(--line,#e9dcd3);min-width:0;color:var(--text,#342c29)}
.grammar-page *, .grammar-lesson-links *{box-sizing:border-box}
.grammar-page [hidden]{display:none!important}
.grammar-heading,.grammar-section-heading,.grammar-workbook-heading{display:flex;align-items:center;justify-content:space-between;gap:20px}
.grammar-heading{align-items:flex-start;margin-bottom:28px}
.grammar-heading h1{margin:8px 0 10px;font:400 clamp(30px,3.5vw,46px)/1.15 var(--display,Georgia,serif)}
.grammar-heading p{max-width:650px;color:var(--muted,#74625b);line-height:1.65;margin:0}
.grammar-heading>.btn{flex-shrink:0;margin-top:12px}
.grammar-page .btn{white-space:normal}
.grammar-actions,.grammar-row-tools{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.grammar-page label{font-size:13px;line-height:1.6;color:var(--text,#342c29)}
.grammar-page input:not([type=checkbox]):not([type=file]),.grammar-page select,.grammar-page textarea{display:block;width:100%;min-height:42px;border:1px solid var(--grammar-line);background:var(--grammar-paper);color:inherit;border-radius:8px;padding:10px 12px;font:inherit;margin-top:5px}
.grammar-page textarea{resize:vertical;line-height:1.65}
.grammar-page input:focus-visible,.grammar-page textarea:focus-visible,.grammar-page select:focus-visible,.grammar-page button:focus-visible,.grammar-page a:focus-visible{outline:2px solid var(--accent,#b54d3c);outline-offset:3px}
.grammar-page button:disabled{opacity:.55;cursor:wait}
.grammar-filters{display:flex;gap:16px;padding:18px 0 26px;border-top:1px solid var(--grammar-line)}
.grammar-filters label{min-width:180px}
.grammar-catalog{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.grammar-topic-card{padding:26px 24px;background:var(--grammar-paper);border:1px solid var(--grammar-line);border-radius:14px;display:flex;flex-direction:column;align-items:flex-start;min-width:0}
.grammar-card-meta{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;font-size:11px;color:var(--muted,#74625b);width:100%}
.grammar-status{font-size:11px;color:var(--accent,#b54d3c)}
.grammar-topic-card h2{font:400 26px/1.3 var(--display,Georgia,serif);margin:22px 0 8px;overflow-wrap:anywhere}
.grammar-topic-card p{color:var(--muted,#74625b);font-size:13px;margin:4px 0;line-height:1.6}
.grammar-topic-card .grammar-card-count{margin:18px 0}
.grammar-topic-card .grammar-actions{margin-top:auto}
.grammar-empty{padding:44px 28px;text-align:center;background:var(--grammar-paper);border:1px dashed var(--grammar-line);border-radius:14px;margin:18px 0}
.grammar-empty h2{font:400 30px var(--display,Georgia,serif)}
.grammar-empty p{line-height:1.65;color:var(--muted,#74625b)}
.grammar-empty .grammar-actions{justify-content:center}
.grammar-message{white-space:pre-line;line-height:1.6;color:var(--grammar-green);margin:20px 0 0;position:relative}
.grammar-message:empty{display:none}
.grammar-message.is-error{color:var(--danger,#a5263e)}
.grammar-help{font-size:12px;color:var(--muted,#74625b);line-height:1.6;font-weight:400}
.grammar-editor-layout{display:grid;grid-template-columns:minmax(0,1fr) 230px;align-items:start;gap:24px}
.grammar-editor{min-width:0}
.grammar-edit-fields{border:0;padding:0;margin:0;min-width:0}
.grammar-editor-section{padding:25px;background:var(--grammar-paper);border:1px solid var(--grammar-line);border-radius:14px;margin-bottom:22px}
.grammar-editor-section>label{display:block;margin:14px 0}
.grammar-editor-section>p{font-size:13px;line-height:1.65;color:var(--muted,#74625b)}
.grammar-section-heading{margin-bottom:18px;align-items:baseline}
.grammar-section-heading h2{font:400 24px/1.3 var(--display,Georgia,serif);margin:0}
.grammar-section-heading h2>span{font:500 11px/1 var(--body);color:var(--accent,#b54d3c);margin-right:9px}
.grammar-section-heading h3{font-size:14px;margin:0}
.grammar-form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.grammar-meta-fields{grid-template-columns:1fr 90px 1.5fr}
.grammar-publish-panel{position:sticky;top:24px;border-left:2px solid var(--grammar-line);padding:16px 0 16px 21px}
.grammar-publish-panel h2{font:400 26px/1.25 var(--display,Georgia,serif);margin:12px 0}
.grammar-publish-panel p{font-size:12px;line-height:1.65;color:var(--muted,#74625b)}
.grammar-publish-actions{display:flex;flex-direction:column;gap:10px}
.grammar-upload{display:flex;gap:14px;flex-wrap:wrap;align-items:center;margin:20px 0}
.grammar-upload label{position:relative;overflow:hidden;cursor:pointer}
.grammar-upload input[type=file]{position:absolute;inset:0;opacity:0;width:100%;cursor:pointer}
.grammar-upload label:focus-within{outline:2px solid var(--accent,#b54d3c);outline-offset:3px}
.grammar-source-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.grammar-source-grid figure{margin:0;padding:8px;border:1px solid var(--grammar-line);border-radius:8px;min-width:0}
.grammar-source-grid img{width:100%;height:130px;object-fit:contain;background:white}
.grammar-source-grid figcaption{font-size:11px;margin:7px 0;overflow-wrap:anywhere}
.grammar-source-grid .btn{font-size:11px;padding:5px 8px;min-height:30px}
.grammar-edit-exercise{padding:20px 0;border-top:1px solid var(--grammar-line)}
.grammar-edit-exercise>label{display:block;margin-bottom:10px}
.grammar-edit-exercise .grammar-section-heading .btn{font-size:11px;padding:5px 9px;min-height:30px}
.grammar-gap-fields{display:grid;grid-template-columns:1fr .75fr 1.4fr;gap:10px;margin:15px 0}
.grammar-gap-preview{white-space:pre-wrap;overflow-wrap:anywhere;font-size:18px;padding:14px 18px;background:var(--bg,#fffaf5);border-radius:8px;line-height:1.8}
.grammar-gap-preview span{color:var(--accent,#b54d3c);margin:0 4px}
.grammar-page .grammar-check-label{display:flex;align-items:flex-start;gap:9px;font-size:12px;margin-top:16px}
.grammar-check-label input,.grammar-lesson-option input,.grammar-proposal-exercise input{width:17px;height:17px;flex-shrink:0;accent-color:var(--accent,#b54d3c);margin:2px 0}
.grammar-lesson-options{max-height:320px;overflow-y:auto;border:1px solid var(--grammar-line);border-radius:9px;margin-top:14px;padding:0 14px}
.grammar-lesson-option{display:flex;align-items:flex-start;gap:10px;padding:13px 0;border-bottom:1px solid var(--grammar-line);cursor:pointer}
.grammar-lesson-option:last-child{border-bottom:0}
.grammar-lesson-option strong,.grammar-lesson-option small{display:block;font-size:12px;line-height:1.5}
.grammar-lesson-option small{color:var(--muted,#74625b);margin-top:4px}
.grammar-proposal{background:var(--bg,#fffaf5);border:1px solid var(--grammar-line);padding:22px;border-radius:10px;margin:20px 0 0}
.grammar-proposal h3{margin:0 0 8px;font-size:18px}
.grammar-proposal p{font-size:13px;line-height:1.65}
.grammar-proposal-exercise{display:flex;gap:12px;padding:14px 0;border-top:1px solid var(--grammar-line)}
.grammar-proposal-exercise strong,.grammar-proposal-exercise small{display:block;line-height:1.7}
.grammar-proposal-exercise strong{font-weight:500;white-space:pre-wrap}
.grammar-proposal-exercise small{font-size:12px;color:var(--muted,#74625b)}
.grammar-proposal mark{color:var(--accent,#b54d3c);background:transparent;font-weight:700;text-decoration:underline;text-underline-offset:3px}
.grammar-preview-dialog{width:min(900px,calc(100% - 28px));max-height:90vh;border:1px solid var(--grammar-line);border-radius:16px;padding:28px;background:var(--grammar-paper);color:inherit}
.grammar-preview-dialog::backdrop{background:#342c2970}
.grammar-workbook-heading{margin:0 0 28px;font-size:12px}
.grammar-workbook-heading .back{margin:0}
.grammar-workbook{display:grid;grid-template-columns:230px minmax(0,1fr);gap:48px;align-items:start}
.grammar-contents{border-right:1px solid var(--grammar-line);padding-right:28px;position:sticky;top:22px}
.grammar-contents>.eyebrow{font-size:10px;letter-spacing:.09em;line-height:1.8}
.grammar-contents h2{font:400 29px/1.25 var(--display,Georgia,serif);margin:11px 0 22px}
.grammar-level-badge{font-size:14px;color:var(--accent,#b54d3c);padding:12px 14px;background:var(--grammar-paper);border:1px solid var(--grammar-line);border-radius:8px}
.grammar-level-badge span{display:block;font-size:11px;color:var(--muted,#74625b);margin-top:3px}
.grammar-contents nav{display:flex;flex-direction:column;gap:4px;margin:22px 0 30px}
.grammar-contents nav a{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13px;line-height:1.5;text-decoration:none;color:var(--muted,#74625b);padding:11px 12px;border-radius:7px;overflow-wrap:anywhere}
.grammar-contents nav a[aria-current=page]{background:var(--accent,#b54d3c);color:white}
.grammar-contents nav a:hover{box-shadow:inset 0 0 0 1px var(--grammar-line)}
.grammar-progress{border-top:1px solid var(--grammar-line);padding-top:22px}
.grammar-progress>div{display:flex;justify-content:space-between;font-size:11px;gap:6px}
.grammar-progress strong{font-weight:600}
.grammar-progress progress{appearance:none;width:100%;height:5px;border:0;border-radius:9px;overflow:hidden;margin:13px 0 7px;background:var(--grammar-line)}
.grammar-progress progress::-webkit-progress-bar{background:var(--grammar-line)}
.grammar-progress progress::-webkit-progress-value{background:var(--accent,#b54d3c)}
.grammar-progress progress::-moz-progress-bar{background:var(--accent,#b54d3c)}
.grammar-progress small{font-size:10px;color:var(--muted,#74625b)}
.grammar-related-lessons{margin-top:28px;font-size:12px;line-height:1.6}
.grammar-related-lessons summary{cursor:pointer}
.grammar-related-lessons a{display:block;margin:10px 0;color:var(--accent,#b54d3c)}
.grammar-workbook-main{min-width:0}
.grammar-topic-heading h1{font:400 clamp(32px,3.7vw,48px)/1.16 var(--display,Georgia,serif);margin:12px 0 15px;overflow-wrap:anywhere}
.grammar-topic-heading p{font-size:14px;color:var(--muted,#74625b);margin:0 0 26px}
.grammar-rule{background:var(--grammar-paper);border:1px solid var(--grammar-line);border-left:3px solid var(--accent,#b54d3c);border-radius:0 12px 12px 0;padding:23px 27px;margin-bottom:35px}
.grammar-rule-label{display:block;font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--accent,#b54d3c);margin-bottom:12px}
.grammar-rule-text{white-space:pre-wrap;line-height:1.9;font-size:16px;overflow-wrap:anywhere}
.grammar-practice-heading{display:flex;gap:15px;align-items:center;justify-content:space-between;padding-bottom:19px;border-bottom:1px solid var(--grammar-line)}
.grammar-practice-heading h2{font:400 29px var(--display,Georgia,serif);margin:0;white-space:nowrap}
.grammar-audio-options{display:flex;gap:16px;align-items:center}
.grammar-audio-options>label{font-size:10px}
.grammar-audio-options select{font-size:11px;padding:6px 9px;min-height:34px}
.grammar-audio-options .grammar-check-label{font-size:10px;max-width:115px;margin:0;align-items:center}
.grammar-exercise{display:flex;gap:18px;padding:25px 4px 24px;border-bottom:1px solid var(--grammar-line)}
.grammar-row-number{font:400 13px/36px var(--display,Georgia,serif);color:var(--muted,#74625b);width:22px;flex-shrink:0}
.grammar-row-main{min-width:0;flex:1}
.grammar-row-main form{display:flex;align-items:center;gap:14px;justify-content:space-between}
.grammar-page .grammar-sentence{display:block;font-size:20px;line-height:2.2;white-space:pre-wrap;overflow-wrap:anywhere}
.grammar-page .grammar-sentence input[name=answer]{display:inline-block;width:112px;max-width:100%;min-height:36px;height:38px;border:0;border-bottom:2px solid #c8b4a7;border-radius:0;padding:3px 8px;margin:0 5px;text-align:center;font-size:20px;line-height:1.3;background:transparent;vertical-align:baseline}
.grammar-sentence input::placeholder{color:var(--muted,#74625b)}
.grammar-check{font-size:11px;min-height:34px;padding:7px 11px;flex-shrink:0}
.grammar-correct-label{font-size:11px;color:var(--grammar-green);white-space:nowrap}
.grammar-exercise.is-correct .grammar-sentence input{border-color:var(--grammar-green);background:var(--grammar-soft-green);color:var(--grammar-green)}
.grammar-translation{font-size:12px;color:var(--muted,#74625b);margin:8px 0 11px;line-height:1.6}
.grammar-row-tools{gap:11px}
.grammar-row-tools .btn{font-size:11px;padding:4px 0;border:0;background:transparent;color:var(--muted,#74625b);min-height:30px;box-shadow:none}
.grammar-row-tools .btn:hover{color:var(--accent,#b54d3c)}
.grammar-row-tools .grammar-help{font-size:10px}
.grammar-row-feedback{font-size:12px;line-height:1.6;color:var(--accent,#b54d3c);margin:9px 0}
.grammar-row-feedback:empty{display:none}
.grammar-answer-explanation{font-size:12px;color:var(--grammar-green);line-height:1.6;margin:8px 0}
.grammar-answer-explanation:empty{display:none}
.grammar-workbook-note{font-size:11px;color:var(--muted,#74625b);line-height:1.7;margin-top:23px}
.grammar-visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.grammar-lesson-links{margin:26px 0;border:1px solid var(--line,#e9dcd3);border-left:3px solid var(--accent,#b54d3c);background:var(--panel,#fffdf9);border-radius:0 12px 12px 0;padding:24px}
.grammar-lesson-links h2{font:400 27px/1.3 var(--display,Georgia,serif);margin:8px 0 18px}
.grammar-lesson-link-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.grammar-lesson-links a{display:flex;align-items:center;justify-content:space-between;gap:15px;text-decoration:none;color:var(--text,#342c29);border:1px solid var(--line,#e9dcd3);border-radius:8px;padding:14px 16px}
.grammar-lesson-links a:hover{border-color:var(--accent,#b54d3c)}
.grammar-lesson-links strong,.grammar-lesson-links small{display:block;line-height:1.5}
.grammar-lesson-links strong{font-size:13px;font-weight:500}
.grammar-lesson-links small{font-size:11px;color:var(--muted,#74625b);margin-top:5px}
.grammar-lesson-links .grammar-manage-links{display:inline-flex;margin-top:18px;font-size:12px;justify-content:flex-start}
.grammar-link-layout{grid-template-columns:minmax(0,1fr) 255px}
.grammar-topic-options{margin-top:18px;border-top:1px solid var(--grammar-line);max-height:500px;overflow-y:auto}
.grammar-topic-option{align-items:center;padding:16px 0;gap:12px}
.grammar-topic-option>span{flex:1;min-width:0;overflow-wrap:anywhere}
.grammar-topic-preview{font-size:11px;color:var(--accent,#b54d3c);white-space:nowrap;flex-shrink:0;padding:8px 0 8px 8px}
#grammar-link-conflict:not(:empty){border-top:1px solid var(--grammar-line);margin-top:18px;padding-top:4px}
#grammar-link-conflict .btn{width:100%;font-size:12px}
@media(max-width:1150px){.grammar-catalog{grid-template-columns:repeat(2,minmax(0,1fr))}.grammar-editor-layout{grid-template-columns:minmax(0,1fr)}.grammar-publish-panel{position:static;border:1px solid var(--grammar-line);border-radius:12px;padding:22px}.grammar-publish-actions{flex-direction:row;flex-wrap:wrap}.grammar-workbook{gap:28px;grid-template-columns:190px minmax(0,1fr)}.grammar-contents{padding-right:20px}.grammar-practice-heading{align-items:flex-start;flex-direction:column}.grammar-audio-options{width:100%;justify-content:space-between}.grammar-audio-options .grammar-check-label{max-width:none}}
@media(max-width:760px){.grammar-heading{flex-direction:column;gap:10px}.grammar-heading h1{font-size:34px}.grammar-heading>.btn{margin-top:0}.grammar-catalog{grid-template-columns:1fr}.grammar-filters label{min-width:0;flex:1}.grammar-workbook{display:block}.grammar-contents{position:static;border:0;padding:0 0 24px}.grammar-contents>.eyebrow,.grammar-contents h2{display:none}.grammar-level-badge{display:inline-flex;align-items:center;gap:10px;padding:8px 12px}.grammar-level-badge span{display:inline;margin:0}.grammar-contents nav{flex-direction:row;overflow-x:auto;margin:12px 0 16px;padding-bottom:5px}.grammar-contents nav a{flex-shrink:0;max-width:260px;font-size:12px;padding:9px 12px}.grammar-contents nav a span{display:none}.grammar-progress{padding-top:12px}.grammar-related-lessons{margin-top:12px}.grammar-topic-heading h1{font-size:34px}.grammar-rule{padding:20px;margin-bottom:25px}.grammar-rule-text{font-size:14px}.grammar-exercise{gap:10px;padding:21px 0}.grammar-row-main form{flex-wrap:wrap;justify-content:flex-start;gap:8px}.grammar-page .grammar-sentence{font-size:18px}.grammar-page .grammar-sentence input[name=answer]{font-size:18px;width:92px}.grammar-row-number{width:18px;font-size:12px}.grammar-exercise .grammar-check{margin-top:4px}.grammar-editor-section{padding:18px 15px}.grammar-meta-fields{grid-template-columns:1fr 85px}.grammar-meta-fields>label:last-child{grid-column:1/-1}.grammar-form-grid:not(.grammar-meta-fields){grid-template-columns:1fr}.grammar-section-heading{align-items:flex-start;flex-wrap:wrap;gap:10px}.grammar-gap-fields{grid-template-columns:1fr}.grammar-source-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.grammar-workbook-heading{gap:10px;align-items:flex-start}.grammar-preview-dialog{padding:18px}.grammar-lesson-links{padding:18px}.grammar-lesson-links>div:last-child{grid-template-columns:1fr}.grammar-lesson-links h2{font-size:24px}.grammar-publish-actions{flex-direction:column}}
@media(prefers-reduced-motion:reduce){.grammar-page *{scroll-behavior:auto!important}}
@media(max-width:1150px){.grammar-link-layout{grid-template-columns:minmax(0,1fr)}}
@media(max-width:760px){.grammar-lesson-link-cards{grid-template-columns:1fr}.grammar-topic-option{flex-wrap:wrap;align-items:flex-start}.grammar-topic-option>span{flex-basis:calc(100% - 35px)}.grammar-topic-preview{margin-left:29px;padding:0 0 4px}.grammar-lesson-links .grammar-manage-links{width:100%}.grammar-topic-options{max-height:none}}