:root{--ui-accent:#284e40;--ui-ink:#20372b;--ui-muted:#5c6c62;--ui-border:#cfdbd2;--ui-surface:#fff;--ui-soft:#f1f5f1;--ui-danger:#9c3434;--ui-radius:10px;--ui-focus:#44795e}
:is(.app-ui,.student-preview-screen) .ui-button{box-sizing:border-box;min-height:36px;padding:8px 12px;border:1px solid var(--ui-border);border-radius:var(--ui-radius);background:var(--ui-surface);color:var(--ui-ink);font:inherit;font-size:14px;line-height:1.3;cursor:pointer;box-shadow:none}
:is(.app-ui,.student-preview-screen) .ui-button:hover:not(:disabled){background:var(--ui-soft);border-color:#8eaa97}
:is(.app-ui,.student-preview-screen) .ui-button.ui-primary{background:var(--ui-accent);border-color:var(--ui-accent);color:white}
:is(.app-ui,.student-preview-screen) .ui-button.ui-primary:hover:not(:disabled){background:#1e3f32}
:is(.app-ui,.student-preview-screen) .ui-button.ui-danger{color:var(--ui-danger)}
:is(.app-ui,.student-preview-screen) .ui-button.ui-danger:hover:not(:disabled){background:#fff2f0;border-color:#d7adab}
:is(.app-ui,.student-preview-screen) .ui-button:disabled{opacity:.6;cursor:not-allowed}
:is(.app-ui,.student-preview-screen) :is(button,summary,a,input,select,textarea,[contenteditable]):focus-visible{outline:3px solid var(--ui-focus);outline-offset:3px}
.builder-screen :is(.editor-block,#lesson-details) :is(input[type="text"],textarea,select),.lesson-audio select,dialog :is(input[type="text"],input[type="email"],input[type="password"],textarea,select){border:1px solid var(--ui-border);border-radius:var(--ui-radius);background:var(--ui-surface);color:var(--ui-ink);font:inherit;padding:10px 12px;min-width:0;max-width:100%;box-sizing:border-box}
.builder-screen .rich-editor{border-color:var(--ui-border);border-radius:var(--ui-radius)}
.ui-upload{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin:12px 0;min-width:0}
.home .ui-upload-picker,.ui-upload-picker{position:relative;display:inline-flex;align-items:center;margin:0;padding:10px 14px;min-height:40px;flex-shrink:0;border:1px solid var(--ui-border);border-radius:var(--ui-radius);background:var(--ui-surface);color:var(--ui-ink);font-weight:500;cursor:pointer}
.ui-upload-picker:hover{background:var(--ui-soft)}.ui-upload-picker:focus-within{outline:3px solid var(--ui-focus);outline-offset:3px}
.ui-upload-picker input[type="file"]{position:absolute;width:1px;height:1px;clip-path:inset(50%);overflow:hidden;padding:0;border:0}
.ui-upload-picker[data-disabled="true"]{opacity:.6;cursor:wait}.ui-upload-name{font-size:14px;color:var(--ui-muted);overflow-wrap:anywhere;min-width:0}
.ui-status:not(:empty){padding:10px 12px;background:var(--ui-soft);border-radius:8px;color:var(--ui-ink);font-size:14px;line-height:1.5;overflow-wrap:anywhere}
[role="alert"].ui-status:not(:empty){background:#fff2f0;color:#8d3030}
#save-state.ui-status{padding:4px 8px;background:transparent}#save-state.ui-status[data-dirty="true"]{background:#fff6df;color:#62450d}
dialog{border-color:var(--ui-border);border-radius:14px;color:var(--ui-ink);box-shadow:0 20px 70px #14231b2b}dialog::backdrop{background:#14231b66}
.catalog-menu>summary,.account-menu>summary{min-width:36px;min-height:36px;display:flex;align-items:center;justify-content:center;border-radius:var(--ui-radius)}
.catalog-menu[open],.account-menu[open]{z-index:50}
.catalog-menu>.ui-button,.catalog-dropdown>.ui-button,.account-dropdown>.ui-button{width:100%;text-align:left;white-space:normal;border-color:transparent}
.exercise-heading{position:relative}.teacher-block-menu{margin-left:auto;position:relative}
.teacher-block-menu[open]{position:absolute;right:0;top:0;width:min(290px,calc(100vw - 72px));padding:8px;background:white;border:1px solid var(--ui-border);border-radius:12px;box-shadow:0 10px 32px #14231b26}
.teacher-block-menu>summary{margin-left:auto;width:36px}.teacher-block-menu>button{display:block;width:100%;margin:4px 0;text-align:left}
.teacher-actions:empty{display:none}.mark-buttons .ui-button{min-width:38px;font-size:18px}
.lesson-audio{padding:14px;border:1px solid var(--ui-border);border-radius:12px;background:#f8faf7;display:grid;gap:12px}
.lesson-audio audio{width:100%;height:44px;min-width:0}.audio-toolbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.audio-toolbar label{display:flex;align-items:center;gap:8px;color:var(--ui-muted);font-size:14px;margin:0}.lesson-audio select{padding:7px 10px;width:auto}.audio-transcript{margin:0;padding:14px;background:white;border:1px solid var(--ui-border);border-radius:8px;overflow-wrap:anywhere}
@media(max-width:680px){:is(.app-ui,.student-preview-screen) .ui-button{min-height:42px}.ui-upload{align-items:flex-start;flex-direction:column}.audio-toolbar{align-items:flex-start;flex-direction:column}}
.app-ui .ui-button.primary{background:var(--ui-accent);border-color:var(--ui-accent);color:white}.app-ui .ui-button.primary:hover:not(:disabled){background:#1e3f32}
.app-ui :is(#auth-form,#choose-material) :is(input[type="text"],input[type="email"],input[type="password"]),dialog input:not([type]){border:1px solid var(--ui-border);border-radius:var(--ui-radius);padding:10px 12px;font:inherit;color:var(--ui-ink);background:white;min-width:0;max-width:100%}
.students-page #students-heading{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.students-page .work-heading{margin-bottom:24px}

/* Shared compact lesson workspace and exercise controls. */
body.builder-screen main.home.lesson-builder{width:100%;max-width:1180px!important;margin:0 auto!important;padding:24px!important;box-sizing:border-box}
.builder-screen .builder-workspace{grid-template-columns:minmax(0,1fr) 240px;gap:24px}
.builder-screen .builder-header{display:flex;flex-wrap:wrap;gap:12px;align-items:center}.builder-screen .builder-header>div{flex:1 1 360px;min-width:0}.builder-screen #lesson-name{width:100%;font-size:28px}
.builder-screen .builder-outline{padding:16px;background:var(--ui-surface);border:1px solid var(--ui-border);border-radius:14px;box-sizing:border-box}
.builder-screen .section-editor-heading{gap:12px;margin-bottom:20px}.builder-screen .section-editor-actions{gap:8px}
.builder-screen .builder-block-actions{gap:8px;margin-bottom:16px;padding-bottom:16px}.builder-screen .builder-block-actions select{height:36px;margin:0;font-size:14px}
.builder-screen .builder-block-actions .catalog-menu{position:relative;flex:0 0 36px;width:36px;min-width:36px;padding:0;border:0;background:transparent;box-shadow:none;align-self:center}
.builder-screen .builder-block-actions .catalog-menu>summary{width:36px;height:36px;box-sizing:border-box;border:1px solid var(--ui-border);background:var(--ui-surface);margin:0;cursor:pointer}
.builder-screen .builder-block-actions .catalog-menu[open]>button{position:absolute;left:0;top:44px;width:240px;max-width:calc(100vw - 80px);padding:12px;background:white;border:1px solid var(--ui-border);border-radius:var(--ui-radius);box-shadow:0 8px 24px #14231b20;z-index:55}
.builder-screen #block-picker{width:min(920px,calc(100vw - 32px));padding:24px;overflow:auto}
.builder-screen #block-picker .block-types{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:20px}
.builder-screen #block-picker .block-types>button{display:flex;flex-direction:column;align-items:flex-start;justify-content:flex-start;gap:8px;min-width:0;min-height:120px;height:auto;padding:16px;white-space:normal;text-align:left;overflow-wrap:anywhere;border-radius:12px}
.builder-screen #block-picker .block-types>button strong{font-size:16px;line-height:1.4}.builder-screen #block-picker .block-types>button span{font-size:14px;line-height:1.45;white-space:normal;color:var(--ui-muted)}
.builder-screen .rich-input.rich-input-compact{min-height:44px;padding:10px 12px}.builder-screen .rich-input-compact p{margin:0}.builder-screen .editor-block input[type=text]{min-height:40px;padding:8px 10px}
.builder-screen .builder-array-row{gap:8px;padding:10px}.builder-screen .builder-array-row label{min-width:0}
.exercise-ghost{display:inline-flex;align-items:center;box-sizing:border-box;padding:10px 14px;border:1px dashed #9aa89f;border-radius:10px;background:#f2f5f2;color:#65776b;opacity:.38;user-select:none;pointer-events:none;white-space:pre-wrap;overflow-wrap:anywhere}
.ui-audio-source{display:none!important}.ui-audio-player{display:grid;grid-template-columns:40px minmax(80px,1fr) auto;align-items:center;gap:12px;padding:14px;border:1px solid var(--ui-border);border-radius:12px;background:#f5f8f5;box-sizing:border-box;max-width:100%;margin:10px 0}
.ui-audio-player[hidden]{display:none!important}.ui-audio-player button{font:inherit;border:1px solid var(--ui-border);border-radius:8px;cursor:pointer;background:white;color:var(--ui-ink);min-height:34px;padding:6px 10px}.ui-audio-player .ui-audio-play{width:40px;height:40px;background:var(--ui-accent);color:white;border-color:var(--ui-accent)}
.ui-audio-player .ui-audio-seek{width:100%;min-width:0;height:28px;padding:0!important;margin:0;accent-color:var(--ui-accent);cursor:pointer}.ui-audio-time{font-size:13px;font-variant-numeric:tabular-nums;color:var(--ui-muted);white-space:nowrap}.ui-audio-rates{grid-column:2 / -1;display:flex;gap:6px;justify-content:flex-end}.ui-audio-rate[aria-pressed=true]{background:var(--ui-accent);border-color:var(--ui-accent);color:white}.ui-audio-error:empty{display:none}.ui-audio-error{grid-column:1 / -1;color:var(--ui-danger);font-size:14px}.lesson-audio .audio-toolbar label[hidden]{display:none!important}.lesson-audio .audio-toolbar:not(:has(>button:not([hidden]))){display:none}
@media(max-width:800px){.builder-screen .builder-workspace{display:block}.builder-screen #block-picker .block-types{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:520px){body.builder-screen main.home.lesson-builder{padding:16px!important}.builder-screen #block-picker{padding:16px}.builder-screen #block-picker .block-types{grid-template-columns:1fr}.ui-audio-player{gap:8px;padding:10px}.ui-audio-time{font-size:12px}.builder-screen #lesson-name{font-size:24px}}
.builder-screen .builder-block-actions select{padding:6px 10px;line-height:22px}.builder-screen .rich-input.rich-input-compact{box-sizing:border-box}
.ui-audio-player .ui-audio-volume{grid-column:1 / 3;width:100px;height:28px;padding:0!important;margin:0;accent-color:var(--ui-accent)}.ui-audio-player .ui-audio-rates{grid-column:3}
@media(max-width:420px){.ui-audio-player .ui-audio-volume{width:70px}.ui-audio-player .ui-audio-rate{padding:6px;font-size:12px}}

/* Compact section navigation and block action disclosures. */
.builder-screen .section-nav-row{display:grid;grid-template-columns:18px minmax(0,1fr);gap:4px;align-items:center}.builder-screen .section-nav-grip{padding:4px;width:18px;min-width:0}.builder-screen .section-nav-button{display:grid;grid-template-columns:20px minmax(0,1fr) 20px;align-items:center;gap:8px;padding:12px 8px;width:100%;box-sizing:border-box;line-height:1.4;font-size:14px}.section-nav-count{text-align:right}.builder-screen .section-nav-title{overflow-wrap:break-word}.builder-screen .builder-outline{padding:12px}.builder-screen .builder-outline #add-section{width:100%;white-space:normal}
.builder-screen .builder-card-heading>.catalog-menu{position:relative;flex:0 0 36px;width:36px;min-width:36px;background:none;padding:0;border:0;box-shadow:none}.builder-screen .builder-card-heading>.catalog-menu>summary{width:36px;height:36px;border:1px solid var(--ui-border);cursor:pointer}
.builder-screen .block-actions-dropdown{position:absolute;right:0;left:auto;top:42px;z-index:60;width:240px;max-width:calc(100vw - 64px);padding:8px;background:white;border:1px solid var(--ui-border);border-radius:12px;box-shadow:0 8px 24px #14231b22;box-sizing:border-box}.builder-screen .block-actions-dropdown button,.builder-screen .block-actions-dropdown select{display:block;width:100%;margin:2px 0;min-height:36px;padding:8px 10px;line-height:1.4;font-size:14px;text-align:left;white-space:normal}.builder-screen .block-actions-dropdown [data-action=up]::after{content:' Поднять блок'}.builder-screen .block-actions-dropdown [data-action=down]::after{content:' Опустить блок'}
.builder-screen .gap-mode-label{display:flex;align-items:center;gap:12px;margin:0 0 16px}.builder-screen select.gap-mode-compact{width:auto;max-width:100%;padding:8px 10px;font-size:14px}.field-caption{display:flex;align-items:center;gap:8px;margin:8px 0;font-size:15px;font-weight:550}.field-help{display:inline-block;position:relative;margin:0 0 0 8px;vertical-align:middle}.field-help>summary{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border:1px solid var(--ui-border);border-radius:50%;font-size:13px;cursor:pointer;list-style:none;color:var(--ui-muted)}.field-help>summary::-webkit-details-marker{display:none}.field-help-content{position:absolute;z-index:70;top:28px;left:0;width:250px;max-width:calc(100vw - 70px);padding:12px;background:white;border:1px solid var(--ui-border);border-radius:10px;box-shadow:0 8px 24px #14231b20;font-size:14px;font-weight:400;line-height:1.5;margin:0;color:var(--ui-ink)}
.builder-screen .gap-options-editor{display:flex;flex-wrap:wrap;align-items:flex-start;gap:8px;margin:12px 0}.builder-screen .gap-editor-card[data-compact]{width:auto;min-width:0;max-width:100%;padding:0;margin:0;border:0;background:transparent}.gap-chip{display:inline-block;padding:7px 12px;border:1px solid var(--ui-border);border-radius:8px;background:var(--ui-soft);font-size:14px;line-height:1.4}.gap-editor-card>summary{cursor:pointer}.builder-screen .gap-editor-card[open]{flex:1 1 280px;padding:12px;border:1px solid var(--ui-border);border-radius:10px;background:#fafcf9}.gap-editor-card[open] .gap-chip{margin-bottom:8px}
@media(max-width:520px){.builder-screen .gap-mode-label{align-items:flex-start;flex-direction:column;gap:6px}.field-help-content{left:auto;right:-30px}}

/* Shared learning feedback: local answer states, quiet progress and comments. */
.live-lesson .exercise[data-auto-check=true]{background:white!important;border-color:var(--ui-border)!important}.exercise[data-auto-check=true]>.review>[data-mark-label]{display:none}.exercise[data-auto-check=true] :is(.choice-question,.sequence-exercise,.statement-exercise){background:transparent!important;border-color:var(--ui-border)!important}.answer-feedback{display:inline-flex;align-items:center;gap:8px;margin:6px 8px;vertical-align:middle;background:transparent!important;border:0!important;font-size:14px}.attempt-dots{display:inline-flex;gap:4px}.attempt-dots i{width:6px;height:6px;border:1px solid #94a79a;border-radius:50%;background:transparent}.attempt-dots i[data-used=true]{background:#aa4c45;border-color:#aa4c45}.answer-mark{font-weight:700}.answer-feedback[data-result=wrong] .answer-mark{color:#a33c35}.answer-feedback[data-result=correct] .answer-mark,.answer-revealed{color:#2b7146}.answer-revealed{font-size:14px}.answer-hint{position:relative;display:inline-grid;place-items:center;width:22px;height:22px;border:1px solid var(--ui-border);border-radius:50%;cursor:help;color:var(--ui-muted)}.answer-tooltip{display:none;position:absolute;bottom:28px;left:0;width:max-content;max-width:260px;white-space:normal;padding:10px 12px;border:1px solid var(--ui-border);border-radius:10px;background:white;box-shadow:0 8px 24px #14231b20;color:var(--ui-ink);z-index:60}.answer-hint:hover .answer-tooltip,.answer-hint:focus .answer-tooltip{display:block}.attempt-history,.answer-comments{margin-top:16px;padding-top:12px;border-top:1px solid #e7ece8}.attempt-history>summary,.answer-comments>summary{font-size:14px;color:var(--ui-muted);cursor:pointer}.history-attempt{display:flex;gap:8px;align-items:center;font-size:14px;overflow-wrap:anywhere}.history-attempt [data-result]{background:none!important;padding:2px 6px;border:0}.answer-comments textarea{width:100%;min-height:64px;padding:10px 12px;border:1px solid var(--ui-border);border-radius:10px;box-sizing:border-box;font:inherit;margin:10px 0;resize:vertical}.answer-comments p{white-space:pre-wrap;font-size:15px;overflow-wrap:anywhere}.answer-comments [role=status]{font-size:13px;color:var(--ui-muted);margin-left:10px}.attempt-feedback:empty{display:none}.answer-comments button:disabled{opacity:.5;cursor:not-allowed}
.confirm-action{width:min(440px,calc(100vw - 32px));padding:24px;box-sizing:border-box}.confirm-action h2{font-size:24px;margin:0 0 12px}.confirm-action p{font-size:16px;line-height:1.55}.confirm-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:24px}.student-menu{flex:none}.student-menu .catalog-dropdown{z-index:70}
.drawing-toolbar{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:12px 0}.drawing-toolbar button{min-height:34px;border:1px solid var(--ui-border);border-radius:8px;background:white;padding:6px 10px;font:inherit;font-size:13px;color:var(--ui-ink);cursor:pointer}.drawing-toolbar button:disabled{opacity:.5;cursor:not-allowed}.drawing-toolbar button[aria-pressed=true]{border-color:var(--ui-accent);box-shadow:0 0 0 2px #284e4020}.drawing-toolbar .drawing-color{width:28px;min-height:28px;padding:4px;background:var(--drawing-color);border:3px solid white;outline:1px solid var(--ui-border)}.drawing-toolbar .drawing-color[aria-pressed=true]{outline:2px solid var(--ui-accent)}.drawing-status{font-size:13px;color:var(--ui-muted)}.drawing-image{position:relative;max-width:100%;line-height:0;margin:12px 0}.drawing-image>.lesson-image{display:block;width:100%;margin:0}.drawing-overlay{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}.drawing-overlay[data-drawing=true]{pointer-events:auto;touch-action:none;cursor:crosshair}.image-carousel-track>.drawing-image{flex:0 0 100%;min-width:100%;margin:0;scroll-snap-align:start}.image-carousel-track>.drawing-image>.lesson-image{width:100%;aspect-ratio:16/10;object-fit:cover}
.history-attempt [data-result=wrong]{color:#a33c35}.history-attempt [data-result=correct]{color:#2b7146}.drawing-toolbar button:hover:not(:disabled){filter:brightness(.95)}.drawing-toolbar button:focus-visible,.answer-hint:focus-visible{outline:2px solid var(--ui-accent);outline-offset:3px}.answer-comments textarea:focus-visible{outline:2px solid var(--ui-accent);outline-offset:2px}.answer-comments textarea:disabled{background:#f5f7f5;color:var(--ui-muted)}.answer-feedback{max-width:100%;flex-wrap:wrap}.answer-revealed{overflow-wrap:anywhere}.answer-tooltip{max-width:min(260px,calc(100vw - 80px))}
#lesson[data-role=student] .exercise[data-auto-check=true]>.review{display:none}.teacher-actions:not(:has(button:not([hidden]))){display:none}
/* Sentence slots keep their own position and highlight only the hovered destination. */
.order-text .sentence-slot{padding:5px;border:1px solid transparent;border-radius:12px;transition:background-color .16s,border-color .16s,box-shadow .16s}.order-text .sentence-slot.drag-over{outline:none;background:#edf5ef!important;border-color:#739b82;box-shadow:0 0 0 2px #284e4014}.order-text .sentence-slot.drag-over .sentence-placeholder{border-style:solid;border-color:#739b82;color:var(--ui-accent)}.order-text .sentence-slot>button{border-style:solid;transition:background-color .16s,box-shadow .16s,opacity .16s}.order-text .sentence-slot>button:hover:not(:disabled){box-shadow:0 2px 8px #284e4018;background:#f2f7f3}.order-text .drag-source.dragging{opacity:.3}.image-editor-card .image-upload-preview{display:block;width:100%;height:140px;object-fit:contain;background:#f1f4f1;border:1px solid var(--ui-border);border-radius:10px;margin:0 0 12px}.image-editor-card .image-upload-preview[hidden]{display:none}.image-editor-card [data-state=error]{color:var(--ui-danger)}.image-editor-card [data-state=success]{color:var(--ui-accent)}
@media(prefers-reduced-motion:reduce){.order-text .sentence-slot,.order-text .sentence-slot>button{transition:none}}
.image-upload-status{font-size:13px;line-height:1.4;margin:8px 0;color:var(--ui-muted)}.image-upload-status:empty,.ui-upload-name:empty{display:none}.image-editor-card:has(.image-upload-preview) .ui-upload-name{display:none}
.multi-gap-text :is(input,select,button){max-width:min(600px,100%)!important}.multi-gap-text button.gap-target{width:auto!important;min-width:min(var(--gap-width,48px),100%)!important;max-width:100%!important;height:auto!important;min-height:30px!important;white-space:normal;overflow-wrap:anywhere;vertical-align:middle}.multi-gap-text button.gap-target:empty{min-width:48px!important}
.drawing-palette{display:flex;align-items:center;gap:7px;flex-wrap:wrap;max-width:180px;padding:5px;border-radius:10px;background:#f3f6f3}.drawing-thickness{display:flex;gap:8px;align-items:center;font-size:13px;margin:0}.drawing-range{width:110px;min-width:70px;accent-color:var(--ui-accent);padding:0!important;height:28px;cursor:pointer}.drawing-thickness output{min-width:22px;font-variant-numeric:tabular-nums}.drawing-overlay[data-tool=erase]{cursor:cell}

.answer-tooltip{pointer-events:none}

.note-color-field{display:grid;gap:10px}.note-color-palette{display:flex;gap:10px;flex-wrap:wrap}.note-color-swatch{width:36px!important;height:36px!important;min-width:36px!important;padding:0!important;border:3px solid white!important;border-radius:50%!important;background:var(--swatch)!important;box-shadow:0 0 0 1px var(--ui-border);cursor:pointer}.note-color-swatch:hover{box-shadow:0 0 0 2px #91a68e}.note-color-swatch[aria-pressed=true]{box-shadow:0 0 0 2px #284e40}.note-color-swatch[aria-pressed=true]::after{content:"✓";color:#284e40;font-weight:700}.note-color-swatch:focus-visible{outline:3px solid #91a68e;outline-offset:4px}
.note-color-field{margin-bottom:16px}
/* Answers stay readable after checking; only unused bank ghosts are muted. */
.exercise :is(input,select,textarea,button):disabled:not([data-lesson-action]):not([data-mark]):not([data-record]){opacity:1;-webkit-text-fill-color:currentColor}
.exercise :is(input,select,textarea,button)[data-result=correct],.exercise .choices label[data-result=correct]{background:#e0f3e5!important;border-color:#4a9660!important;color:#1d5930!important;opacity:1!important}
.exercise :is(input,select,textarea,button)[data-result=wrong],.exercise .choices label[data-result=wrong]{background:#fce3df!important;border-color:#c35c50!important;color:#842f26!important;opacity:1!important}
.exercise .answer-unit{display:inline-flex;align-items:center;gap:5px;vertical-align:middle;max-width:100%;min-width:0;box-sizing:border-box}
.exercise .answer-unit-group{display:flex;width:100%;align-items:flex-start}
.exercise .answer-unit-group>:not(.answer-feedback){flex:1;min-width:0}
.exercise .answer-unit>.answer-feedback{flex:0 0 18px;display:inline-flex;flex-direction:column;align-items:center;gap:3px;margin:0;max-width:18px;line-height:1;overflow:visible}
.exercise .attempt-dots{flex-direction:column;gap:3px}
.exercise .attempt-dots i{box-sizing:border-box;flex:0 0 5px;width:5px;height:5px}
.exercise .answer-mark{font-size:12px;line-height:1}
.exercise .answer-hint{width:16px;height:16px;font-size:11px}
.exercise .answer-revealed{position:relative;display:block;min-width:120px;max-width:220px;padding:5px;background:white!important;border:1px solid #b8d2bd!important;border-radius:6px;line-height:1.4;z-index:2}
.exercise .multi-gap-text select{width:var(--gap-width,90px)!important;padding-right:26px!important;max-width:100%!important;flex-shrink:1}
.exercise .multi-gap-text .answer-unit>:is(input,select,button){margin-left:0!important;margin-right:0!important;min-width:0!important}
.matching-pairs{display:flex;flex-direction:column;gap:12px}
.matching-pair-row{display:grid;grid-template-columns:minmax(0,1fr) 32px minmax(0,1fr);align-items:center;gap:0}
.matching-pair-row>.answer-unit{display:flex;width:100%}
.matching-pair-row .matching-item{width:100%;min-width:0;min-height:48px;white-space:normal;overflow-wrap:anywhere;transition:background-color .15s,border-color .15s,box-shadow .15s}
.matching-pair-row>.answer-unit>.matching-item{flex:1}
.matching-pair-row .matching-item:hover:not(:disabled){border-color:#5b8568;box-shadow:0 0 0 2px #527b6118}
.matching-connector{height:2px;background:#8caa95;visibility:hidden;border:0!important}
.matching-pair-row[data-linked=true]>.matching-connector{visibility:visible}
.matching-pair-row>.matching-connector[data-result=correct]{background:#4a9660!important}
.matching-pair-row>.matching-connector[data-result=wrong]{background:#c35c50!important}
@media(max-width:520px){.matching-pair-row{grid-template-columns:minmax(0,1fr) 20px minmax(0,1fr)}.matching-pair-row .matching-item{padding:9px;font-size:14px}}
@media(prefers-reduced-motion:reduce){.matching-pair-row .matching-item{transition:none}}
.exercise .answer-unit:has(>.answer-revealed){display:inline-grid;grid-template-columns:18px minmax(0,1fr);align-items:center;column-gap:5px;row-gap:4px}
.exercise .answer-unit-group:has(>.answer-revealed){display:grid}
.exercise .answer-unit>.answer-revealed{grid-column:2;position:static;min-width:0;max-width:100%;box-sizing:border-box;margin:0;font-size:13px}
.exercise .matching-pair-row>.answer-revealed{grid-column:1/-1;position:static;min-width:0;width:fit-content;max-width:calc(100% - 23px);margin:4px 0 0 23px;box-sizing:border-box;font-size:13px}
/* Shared teacher/student selection translator, rendered above lesson content. */
.selection-translation{position:fixed;inset:auto;margin:0;width:320px;max-width:calc(100vw - 24px);box-sizing:border-box;border:1px solid #dce5dd;border-radius:16px;background:#fff;color:#24392c;padding:16px;box-shadow:0 12px 40px #1c352326;z-index:1500;font:14px/1.5 Arial,sans-serif;overflow-wrap:anywhere}
.selection-translation[hidden]{display:none!important}.selection-translation::backdrop{background:transparent;pointer-events:none}
.translation-header,.translation-footer{display:flex;align-items:center;justify-content:space-between;gap:12px}.translation-header strong{font-size:14px;font-weight:700}.translation-source{font-size:13px;color:#6c786e;margin:10px 0 8px;padding-bottom:10px;border-bottom:1px solid #edf0ea;max-height:80px;overflow:auto}.translation-result{font-size:17px;line-height:1.5;margin:0 0 14px;color:#24392c}.translation-footer{font-size:11px;color:#7b877e}.selection-translation button{font:inherit;cursor:pointer;border:1px solid transparent;border-radius:8px;background:transparent;color:#365d44;transition:background .15s}.selection-translation .translation-close{display:grid;place-items:center;width:28px;height:28px;padding:0;font-size:22px;line-height:1;color:#6d796f}.selection-translation button:hover{background:#eff4ee}.selection-translation button:active{background:#e2ecdf}.selection-translation button:focus-visible{outline:2px solid #547c61;outline-offset:2px}.selection-translation .translation-retry{font-size:12px;padding:5px 9px;border-color:#dce5dd}.translation-retry[hidden]{display:none}.selection-translation[data-state=loading] .translation-result{font-size:14px;color:#6c786e;display:flex;align-items:center;gap:8px}.selection-translation[data-state=loading] .translation-result:before{content:'';width:12px;height:12px;border:2px solid #e0e9df;border-top-color:#55795b;border-radius:50%;animation:translation-spin .8s linear infinite}.selection-translation:is([data-state=error],[data-state=limit]) .translation-result{font-size:14px;color:#885142}@keyframes translation-spin{to{transform:rotate(360deg)}}@media(prefers-reduced-motion:reduce){.selection-translation[data-state=loading] .translation-result:before{animation:none}.selection-translation button{transition:none}}

.selection-translation[data-state=ready] .translation-retry{background:#284e40;border-color:#284e40;color:white;padding:7px 13px;font-size:13px;font-weight:600}.selection-translation[data-state=ready] .translation-retry:hover{background:#34614f}.selection-translation[data-state=ready] .translation-retry:active{background:#203f34}.selection-translation .translation-result[hidden]{display:none}
/* Lesson cards share the editor's Manrope, sage palette and component geometry. */
@font-face{font-family:Manrope;src:url('/design/manrope.ttf') format('truetype');font-weight:200 800;font-style:normal;font-display:swap}
:is(.live-lesson,.student-preview-screen){--lesson-ink:#2c3e2c;--lesson-border:#e0ddd7;--lesson-sage:#7a8b6f;background:#fafaf7}
:is(#lesson,#student-preview-content) .exercise{font-family:Manrope,sans-serif;color:var(--lesson-ink,#2c3e2c);padding:36px;border:0;border-radius:16px;box-shadow:0 8px 24px #2d3b2d14;min-width:0;overflow-wrap:anywhere}
:is(#lesson,#student-preview-content) .exercise:not(.teacher-note):not([data-mark=correct]):not([data-mark=wrong]){background:white}
.live-lesson .exercises,#student-preview-content{gap:32px}
:is(#lesson,#student-preview-content) .exercise-heading{display:flex;align-items:center;gap:16px;margin:0 0 28px;min-width:0}
:is(#lesson,#student-preview-content) .exercise-heading>.number{display:grid;place-items:center;box-sizing:border-box;min-width:42px;height:42px;padding:0 6px;border-radius:12px;background:#7a8b6f;color:white;font:800 15px/1 Manrope,sans-serif;transform:rotate(-3deg);box-shadow:0 3px 0 #547a5430}
:is(#lesson,#student-preview-content) .exercise-heading h2{font:700 20px/1.4 Manrope,sans-serif;color:#2c3e2c;margin:0;min-width:0}
:is(#lesson,#student-preview-content) .exercise-heading>.catalog-menu{margin-left:auto;flex:none}
:is(#lesson,#student-preview-content) .exercise-heading>.catalog-menu>summary{display:grid;place-items:center;box-sizing:border-box;width:32px;height:32px;min-width:32px;padding:3px;border:1px solid #e0ddd7;border-radius:12px;background:white url('/design/more.svg') center/24px 24px no-repeat;font-size:0;list-style:none}
:is(#lesson,#student-preview-content) .exercise-heading>.catalog-menu>summary:after{display:none}
:is(#lesson,#student-preview-content) .exercise-heading>.catalog-menu>summary:hover{background-color:#f2f6ef}
:is(#lesson,#student-preview-content) .exercise .sentence{font-size:18px;line-height:1.7;margin-bottom:20px}
:is(#lesson,#student-preview-content) .exercise :is(input[type=text],textarea,select){font-family:inherit;color:#2c3e2c;border:1px solid #e0ddd7;border-radius:12px;background:#fff;box-sizing:border-box}
:is(#lesson,#student-preview-content) .exercise>input[type=text]{min-height:46px;padding:11px 16px;font-size:16px;width:100%;max-width:540px}
:is(#lesson,#student-preview-content) .exercise textarea{padding:14px 16px;font-size:16px;line-height:1.6}
:is(#lesson,#student-preview-content) .exercise select{padding:9px 32px 9px 12px;font-size:16px;max-width:100%}
:is(#lesson,#student-preview-content) .exercise .multi-gap-text{font-size:18px;line-height:2.1}
:is(#lesson,#student-preview-content) .exercise .multi-gap-text :is(input,select,button){border-radius:8px}
:is(#lesson,#student-preview-content) .exercise :is(.matching-item,.sort-item,.word-bank button,.word-order button,.image-word-target){font-family:inherit;font-size:15px;line-height:1.5;border:1px solid #e0ddd7;border-radius:12px;background:#fff;color:#2c3e2c;padding:12px 16px;box-sizing:border-box}
:is(#lesson,#student-preview-content) .exercise .matching-item{min-height:54px}
:is(#lesson,#student-preview-content) .exercise :is(.word-bank button,.sort-item):hover:not(:disabled){background:#f3f7f0;border-color:#92ab89}
:is(#lesson,#student-preview-content) .exercise :is(.word-bank button,.sort-item)[aria-pressed=true]{background:#edf3e8;border-color:#7a8b6f;box-shadow:0 0 0 2px #7a8b6f22}
:is(#lesson,#student-preview-content) .exercise .choices{gap:12px}
:is(#lesson,#student-preview-content) .exercise .choices label{display:flex;align-items:center;gap:12px;padding:13px 16px;border:1px solid #e0ddd7;border-radius:12px;background:white;font-size:16px;line-height:1.5;min-height:50px;box-sizing:border-box;color:#2c3e2c}
:is(#lesson,#student-preview-content) .exercise .choices label:has(input:checked){background:#eef4e9;border-color:#7a8b6f}
:is(#lesson,#student-preview-content) .exercise .choices input{appearance:none;display:grid;place-content:center;flex:0 0 22px;width:22px;height:22px;margin:0;border:1px solid #c7cec1;background:white;border-radius:6px;cursor:pointer}
:is(#lesson,#student-preview-content) .exercise .choices input[type=radio]{border-radius:50%}
:is(#lesson,#student-preview-content) .exercise .choices input:checked{background:#7a8b6f;border-color:#7a8b6f}
:is(#lesson,#student-preview-content) .exercise .choices input:checked:after{content:'';width:14px;height:14px;background:url('/design/check.svg') center/14px no-repeat}
:is(#lesson,#student-preview-content) .exercise .choices input:disabled{cursor:default}
:is(#lesson,#student-preview-content) .exercise .sort-columns{gap:20px;grid-template-columns:repeat(auto-fit,minmax(min(190px,100%),1fr))}
:is(#lesson,#student-preview-content) .exercise .sort-column{padding:20px;border:1px solid #e0ddd7;border-radius:20px;background:white;min-width:0}
:is(#lesson,#student-preview-content) .exercise .sort-column>button{display:flex;align-items:center;gap:8px;border:0;background:none;color:#2c3e2c;padding:0 0 14px;text-align:left;font:800 15px/1.5 Manrope,sans-serif;min-height:32px}
:is(#lesson,#student-preview-content) .exercise .sort-column>button:before{content:'';width:8px;height:8px;flex:none;background:url('/design/dot.svg') center/8px no-repeat}
:is(#lesson,#student-preview-content) .exercise :is(.image-answer-card,.statement-card){border-color:#e0ddd7;border-radius:16px}
:is(#lesson,#student-preview-content) .exercise .review{border-color:#eeeee8;margin-top:24px;padding-top:16px}
:is(#lesson,#student-preview-content) .exercise .teacher-actions button,:is(#lesson,#student-preview-content) .exercise .mark-buttons button{border:1px solid #e0ddd7;border-radius:10px;background:white;color:#54734e}
:is(#lesson,#student-preview-content) .exercise .teacher-actions button:hover:not(:disabled){background:#f2f6ef}
:is(#lesson,#student-preview-content) .exercise :is(.attempt-history,.answer-comments){border-color:#eeeee8;font-size:13px}
:is(#lesson,#student-preview-content) .exercise :is(.attempt-history,.answer-comments)>summary{font-size:13px;color:#6b7a6b}
:is(#lesson,#student-preview-content) .exercise :is(button,input,select,textarea,summary):focus-visible{outline:2px solid #6b8f6b;outline-offset:3px}
@media(max-width:800px){:is(#lesson,#student-preview-content) .exercise{padding:24px}:is(#lesson,#student-preview-content) .exercise-heading{margin-bottom:22px}}
@media(max-width:520px){:is(#lesson,#student-preview-content) .exercise{padding:20px 16px}.live-lesson .exercises,#student-preview-content{gap:22px}:is(#lesson,#student-preview-content) .exercise-heading{gap:12px}:is(#lesson,#student-preview-content) .exercise-heading h2{font-size:18px}:is(#lesson,#student-preview-content) .exercise-heading>.number{min-width:36px;height:36px;border-radius:10px;font-size:13px}:is(#lesson,#student-preview-content) .exercise .matching-item{font-size:14px;padding:10px}:is(#lesson,#student-preview-content) .exercise .sort-column{padding:16px}:is(#lesson,#student-preview-content) .exercise .multi-gap-text{font-size:16px}}

.answer-unit{align-items:center!important;gap:8px}.answer-feedback{position:relative;align-self:center;flex:0 0 20px!important;width:20px!important;display:flex!important;align-items:center;justify-content:center}
.attempt-symbols{display:flex!important;flex-direction:column;align-items:center;justify-content:center;gap:1px;width:20px;min-width:20px;padding:2px!important;border:0!important;border-radius:6px;background:transparent!important;line-height:12px;cursor:pointer;color:#84948a}
.attempt-symbols:hover,.attempt-symbols:focus-visible{background:#edf2eb!important;outline:2px solid #8ca183;outline-offset:2px}.attempt-symbols span{font-size:13px;line-height:12px;height:12px;background:none!important;border:0!important}.attempt-symbols [data-result=correct],.attempt-history-row>[data-result=correct]{color:#287440!important}.attempt-symbols [data-result=wrong],.attempt-history-row>[data-result=wrong]{color:#b83e35!important}
.attempt-tooltip{display:none;position:absolute;z-index:50;bottom:calc(100% + 8px);left:0;width:max-content;max-width:min(260px,70vw);padding:9px 12px;background:#283e31;color:white;border-radius:9px;box-shadow:0 4px 18px #20332925;font-size:13px;white-space:normal}.answer-feedback:hover .attempt-tooltip,.answer-feedback:focus-within .attempt-tooltip{display:block}
.block-comment-button{margin-left:auto;width:34px;height:34px;min-width:34px;display:grid;place-items:center;padding:7px;border:1px solid #dce2d9;border-radius:10px;background:white;color:#72856a;cursor:pointer}.block-comment-button svg{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}.block-comment-button:hover{background:#eef3eb;border-color:#96a68d}.block-comment-button:focus-visible{outline:2px solid #72856a;outline-offset:3px}.exercise-heading:has(.block-comment-button) .catalog-menu{margin-left:0}.exercise-heading .block-comment-button{order:8}.exercise-heading .catalog-menu{order:9}
.feedback-dialog{box-sizing:border-box;width:min(480px,calc(100vw - 32px));max-height:85dvh;padding:24px;border:1px solid #dce2d9;overflow:auto;background:white}.feedback-dialog header{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:20px}.feedback-dialog h3{margin:0;font-size:19px}.feedback-dialog header button{width:32px;height:32px;padding:0;font-size:22px}.feedback-dialog textarea{width:100%;min-height:72px;margin:16px 0 10px;resize:vertical}.feedback-dialog>p[role=status]{font-size:13px;color:#61715e;margin:10px 0 0}.attempt-history-row{display:flex;align-items:center;gap:14px;padding:14px 0;border-bottom:1px solid #edf0e9}.attempt-history-row:last-child{border:0}.attempt-history-row>span{font-size:20px}.attempt-history-row p{margin:4px 0 0;overflow-wrap:anywhere}.attempt-history-row small{color:#71806d}.comment-thread{max-height:42dvh;overflow:auto;display:flex;flex-direction:column;gap:12px}.comment-message{padding:12px 14px;background:#f1f4ef;border-radius:12px;max-width:90%;align-self:flex-start}.comment-message[data-own=true]{align-self:flex-end;background:#e5eee1}.comment-message small{font-weight:650;color:#617658}.comment-message p{margin:6px 0 0;white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.5}.comment-empty{color:#72806e;font-size:14px;text-align:center;padding:20px 0}
.exercise .answer-feedback .attempt-symbols{display:flex!important;flex-direction:column;width:20px!important;min-width:20px!important;max-width:20px!important;height:42px!important;min-height:42px!important;padding:2px!important;margin:0!important;font-size:13px;line-height:12px;white-space:normal}.exercise .attempt-symbols span{display:block!important;flex:0 0 12px;min-width:12px;text-align:center}.exercise .attempt-history-row>[data-result]{background:transparent!important;border:0!important}.exercise .block-comment-button{display:grid!important;width:34px!important;min-width:34px!important;height:34px!important;padding:7px!important}.exercise .block-comment-button svg{display:block}
.exercise .exercise-heading:has(.block-comment-button) .teacher-block-menu{margin-left:0!important}
.exercise .attempt-symbols span[data-result=correct]{font-size:11px!important;font-weight:600}.exercise .attempt-symbols span[data-result=wrong]{font-size:16px!important;font-weight:600}
.order-text .sentence-slot{display:flex;min-width:0;width:100%;box-sizing:border-box}.order-text .sentence-slot>:is(button,.sentence-placeholder){flex:1;min-width:0;width:100%;box-sizing:border-box}.order-text .word-order{background:transparent!important;border-color:transparent!important;display:flex;flex-direction:column;align-items:stretch;gap:12px}.order-text .word-order>.answer-unit{display:flex;width:100%;align-items:center}.order-text .word-order>.answer-unit>.sentence-slot{flex:1}.order-text .sentence-position{display:none}
.drawing-toolbar .drawing-icon{width:34px;min-width:34px;height:34px;padding:7px;display:grid;place-items:center}.drawing-icon svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}.drawing-toolbar .drawing-palette{display:flex;flex-wrap:nowrap;gap:5px;max-width:none}.drawing-palette .drawing-color:nth-child(n+7){display:none}.drawing-color-menu{position:relative}.drawing-more{list-style:none;display:grid;place-items:center;cursor:pointer;width:30px;height:30px;border:1px solid #dce2d9;border-radius:8px;background:white}.drawing-more::-webkit-details-marker{display:none}.drawing-all-colors{position:absolute;z-index:40;top:calc(100% + 8px);right:0;display:grid;grid-template-columns:repeat(5,26px);gap:8px;padding:12px;border:1px solid #dce2d9;border-radius:12px;background:white;box-shadow:0 8px 24px #20332920}.drawing-status:empty{display:none}.drawing-more:focus-visible{outline:2px solid #72856a;outline-offset:3px}@media(max-width:600px){.drawing-palette .drawing-color:nth-child(n+4){display:none}.drawing-toolbar{gap:7px}.drawing-thickness{max-width:160px}}
.order-text .sentence-slot[data-result]{background:transparent!important;border-color:transparent!important}.order-text .word-order>.sentence-slot{width:calc(100% - 28px);margin-left:28px}
.drawing-thickness{white-space:nowrap;flex:0 0 auto;max-width:none}.drawing-toolbar{container-type:inline-size}@media(max-width:600px){.drawing-thickness{max-width:none}.drawing-thickness .drawing-range{width:90px}}@container(min-width:900px){.drawing-palette .drawing-color:nth-child(n){display:block}.drawing-color-menu{display:none}}
/* Vocabulary rows follow the lesson's Figma typography and spacing. */
.vocabulary-list{display:flex;flex-direction:column;gap:20px}
.vocabulary-list .vocabulary-card{display:flex;align-items:flex-start;gap:10px;padding:0;border:0;min-width:0}
.vocabulary-content{min-width:0;flex:1;color:#2c3e2c}
.exercise .vocabulary-content h3,.vocabulary-content h3{font-size:16px;font-weight:800;line-height:1.5;margin:0}
.vocabulary-content p{margin:3px 0 0;font-size:16px;line-height:1.5;overflow-wrap:anywhere}
.vocabulary-content .vocabulary-translation{color:#929b92;font-weight:500}
.vocabulary-content .vocabulary-example{font-size:14px;color:#647166;margin-top:8px}
.vocabulary-content .image-task-thumb{margin-top:10px}
.exercise .vocabulary-speak,.vocabulary-speak{display:grid;place-items:center;flex:0 0 38px;width:38px;height:38px;min-height:38px;padding:0;border:0;border-radius:10px;background:transparent;cursor:pointer}
.vocabulary-speak img{width:38px;height:38px}
.vocabulary-speak:hover{background:#edf3e9}.vocabulary-speak:active{background:#e0eadd}.vocabulary-speak:focus-visible{outline:2px solid #7a8b6f;outline-offset:3px}.vocabulary-speak:disabled{opacity:.4;cursor:default}
.builder-screen .section-nav-button{grid-template-columns:minmax(0,1fr) 20px}
.live-lesson .workspace{grid-template-columns:minmax(0,840px) minmax(260px,300px);max-width:1200px;gap:24px;padding:28px}
.live-lesson .call-panel{padding:20px;border-radius:16px;background:#fff;box-shadow:0 8px 24px #2d3b2d0d;min-width:0}
.live-lesson .call-heading{margin:0 0 12px}.live-lesson .call-heading h2{margin:0;font-size:17px;font-weight:700}
.live-lesson .videos{gap:10px}
.live-lesson .video-tile{aspect-ratio:16/9;border:0;border-radius:12px}
.live-lesson #local,.live-lesson #remote{object-fit:cover}
.live-lesson .video-tile figcaption{left:8px;bottom:8px;padding:3px 7px;font-size:11px}
.live-lesson .controls{display:flex;gap:7px;justify-content:center;margin:12px 0 0}
.live-lesson .controls button{flex:0 0 36px;width:36px;min-height:36px;height:36px;padding:8px;border-radius:10px}
.live-lesson #status{font-size:12px;margin:12px 0 0}.live-lesson #hint:empty,.live-lesson #status:empty{display:none}
.live-lesson #student-sections{margin-top:20px;padding-top:18px;border-color:#f0f1ed}
.live-lesson #student-sections h2{font-size:16px;font-weight:700;margin-bottom:12px}
.live-lesson #student-sections [data-section]{font-size:14px;line-height:1.5;border-radius:10px;padding:10px 12px}
.live-lesson #student-sections [data-section]:hover{background:#f3f6f0}
.live-lesson #student-sections [aria-current=true]{background:#e8eee3;color:#2c3e2c}
@media(max-width:900px){.live-lesson .workspace{grid-template-columns:minmax(0,1fr) 260px;padding:20px;gap:20px}.live-lesson .call-panel{padding:16px}}
@media(max-width:760px){.live-lesson .workspace{grid-template-columns:minmax(0,1fr);padding:16px}.live-lesson .call-panel{width:100%;max-width:420px;box-sizing:border-box}.live-lesson .videos{display:flex;flex-direction:column}}

.lesson-image-figure{margin:0 0 16px;min-width:0}.lesson-image-figure figcaption{padding:10px 0;font-size:14px;line-height:1.5;color:var(--ui-muted);overflow-wrap:anywhere}.image-carousel-track>.lesson-image-figure{flex:0 0 100%;margin:0;scroll-snap-align:start;min-width:100%}.image-carousel-track>.lesson-image-figure .drawing-image{margin:0}.text-answer-question{margin-bottom:24px}.text-answer-question label{display:block;margin-bottom:8px}
.block-comment-button{position:relative}
.block-comment-button[data-unread="true"]::after{content:"";position:absolute;right:-3px;top:-3px;width:7px;height:7px;border-radius:50%;background:#54a06b;border:2px solid #fff}

/* Shared lesson readability and compact editing controls. */
.exercise[data-block-type="rich_text"] > p,.exercise[data-block-type="rich_text"] .rich-content{font-size:18px;line-height:1.7}
.live-lesson[data-viewer-role=teacher] .teacher-answer-hint{font-size:16px;line-height:1.5;font-weight:600;color:var(--ui-ink);background:var(--ui-surface,#fff);border:2px solid var(--ui-accent);box-shadow:0 6px 20px #0002;max-width:min(520px,85%);padding:12px 16px;top:52px}
.exercise .choices label:has(input:checked):not([data-result="correct"]):not([data-result="wrong"]){background:#e5e7e9;border-color:#aeb5ba;color:#27323b}
.drawing-quick{display:flex;align-items:center;gap:8px;margin:0 0 12px}
.drawing-quick button{display:grid;place-items:center;width:36px;height:36px;min-width:36px;padding:7px;border:1px solid var(--ui-border);border-radius:10px;background:var(--ui-surface,#fff);color:var(--ui-ink);cursor:pointer}
.drawing-quick button:hover:not(:disabled){background:var(--ui-accent-soft,#eef2eb)}
.drawing-quick button:disabled{opacity:.45;cursor:default}
.drawing-quick button:focus-visible{outline:2px solid var(--ui-accent);outline-offset:2px}
.drawing-image{isolation:isolate}.drawing-overlay{z-index:2;display:block;max-width:none;max-height:none}
.vocabulary-list .vocabulary-card>.image-task-thumb{width:112px;height:96px;flex:0 0 112px;object-fit:contain;margin:0;border-radius:12px}
.exercise{scroll-margin-top:24px}
.builder-screen .insert-block-between{display:block;margin:12px auto;width:max-content;max-width:100%;padding:7px 18px;border:1px dashed var(--ui-border);border-radius:20px;color:var(--ui-muted);background:transparent;font:inherit;font-size:13px;cursor:pointer}
.builder-screen .insert-block-between:hover,.builder-screen .insert-block-between:focus-visible{color:var(--ui-ink);border-color:var(--ui-accent);background:var(--ui-accent-soft,#eef2eb)}
.builder-screen .block-editor-body>.form-note{font-size:13px;line-height:1.5;padding:8px 12px;border-radius:8px;background:#f1f4ef}
#speaker[data-blocked=true]{outline:2px solid var(--ui-accent);outline-offset:3px}
@media(max-width:600px){.vocabulary-list .vocabulary-card>.image-task-thumb{width:88px;height:80px;flex-basis:88px}.exercise[data-block-type="rich_text"] > p,.exercise[data-block-type="rich_text"] .rich-content{font-size:17px}}

.exercise .attempt-symbols:has(>span:only-child){height:24px!important;min-height:24px!important}
.builder-screen .homework-editor-info{margin:4px 0 20px;padding:14px 18px;border:1px solid var(--ui-border);border-radius:12px;background:var(--ui-surface,#fff);color:var(--ui-muted);font-size:14px;line-height:1.6}
.builder-screen #homework-outline .section-nav-button{padding:10px 8px;min-height:40px}
.builder-screen #homework-outline .section-nav-button[aria-current=true]{background:#eef3eb;border-radius:8px}

/* Live lesson dark palette. Keep answer states separate from surface colors. */
body.live-lesson.dark-theme{
 --ui-accent:#a4c397;--ui-focus:#b0d1a4;--ui-ink:#e6ebe7;--ui-muted:#a6b3ab;
 --ui-border:#42514a;--ui-surface:#222c27;--ui-soft:#2b3830;--ui-danger:#ffaaa3;
 --lesson-canvas:#171e1a;--lesson-input:#1c2520;--lesson-selected:#39483f;
 --lesson-success-bg:#214b36;--lesson-success-ink:#b9f2cc;--lesson-success-border:#66b785;
 --lesson-error-bg:#502d2c;--lesson-error-ink:#ffd0cb;--lesson-error-border:#d88177;
 background:var(--lesson-canvas);color:var(--ui-ink);color-scheme:dark;
}
.live-lesson.dark-theme :is(.workspace,.lesson-header,.teacher-actions,.answer-unit,.matching-pair-row,.lesson-sections,.section-list){background:transparent;box-shadow:none}
.live-lesson.dark-theme #app-header{background:var(--lesson-canvas);border-color:var(--ui-border);color:var(--ui-ink)}
.live-lesson.dark-theme #app-header :is(a,button,.account-name){color:var(--ui-ink)}
.live-lesson.dark-theme #app-header a[aria-current],.live-lesson.dark-theme #app-header a:hover{background:var(--ui-soft)}
.live-lesson.dark-theme :is(.call-panel,dialog,.selection-translation,.catalog-dropdown,.account-dropdown,.ui-audio-rates,.drawing-all-colors){background:var(--ui-surface);color:var(--ui-ink);border-color:var(--ui-border);box-shadow:0 12px 32px #0003}
body.live-lesson.dark-theme #lesson .exercise:not(.teacher-note),body.live-lesson.dark-theme #history-exercises .exercise{background:var(--ui-surface);color:var(--ui-ink);border-color:var(--ui-border);box-shadow:0 8px 24px #0002}
.live-lesson.dark-theme :is(h1,h2,h3,h4,label,.sentence,.rich-content,.multi-gap-text,.vocabulary-content,.translation-result){color:var(--ui-ink)}
.live-lesson.dark-theme #lesson .exercise-heading h2,.live-lesson.dark-theme #lesson .sort-column>button{color:var(--ui-ink)}
.live-lesson.dark-theme :is(.form-note,.lesson-course-title,.vocabulary-translation,.vocabulary-example,.ui-audio-time,.translation-source,.translation-footer,.comment-empty,small,figcaption,#class-presence,#lesson-course-title){color:var(--ui-muted)}
.live-lesson.dark-theme :is(a,.rich-content a){color:var(--ui-accent)}
.live-lesson.dark-theme :is(button,summary,input,textarea,select),.live-lesson.dark-theme #lesson .exercise :is(input,textarea,select,button,.choices label,.matching-item,.sort-item,.gap-target,.image-word-target){background-color:var(--lesson-input);color:var(--ui-ink);border-color:var(--ui-border)}
.live-lesson.dark-theme :is(input,textarea)::placeholder{color:#93a199;opacity:1}
.live-lesson.dark-theme :is(button,summary):hover:not(:disabled),.live-lesson.dark-theme #lesson .exercise button:hover:not(:disabled){background-color:var(--ui-soft);border-color:#7c9384}
.live-lesson.dark-theme :is(button,input,textarea,select):disabled{color:var(--ui-muted)}
.live-lesson.dark-theme :is(.primary,.ui-primary,#start-call,#setup-confirm){background:#91b486;color:#122017;border-color:#91b486}
.live-lesson.dark-theme :is(.primary,.ui-primary,#start-call,#setup-confirm):hover:not(:disabled){background:#a5c59c;color:#122017}
.live-lesson.dark-theme #lesson .exercise-heading>.catalog-menu>summary{background-color:var(--lesson-input);border-color:var(--ui-border)}
.live-lesson.dark-theme #lesson .exercise :is(.sort-column,.image-answer-card,.statement-card){background:var(--lesson-input);border-color:var(--ui-border)}
.live-lesson.dark-theme #lesson .exercise :is(.teacher-actions,.review){background:transparent;border-color:var(--ui-border)}
.live-lesson.dark-theme #lesson .choices label:has(input:checked):not([data-result=correct]):not([data-result=wrong]){background:var(--lesson-selected);border-color:#a0b3a7;color:var(--ui-ink)}
.live-lesson.dark-theme #lesson :is(input,select,textarea,button,label,.image-answer-card,.statement-card)[data-result=correct]{background:var(--lesson-success-bg)!important;color:var(--lesson-success-ink)!important;border-color:var(--lesson-success-border)!important;opacity:1!important}
.live-lesson.dark-theme #lesson :is(input,select,textarea,button,label,.image-answer-card,.statement-card)[data-result=wrong]{background:var(--lesson-error-bg)!important;color:var(--lesson-error-ink)!important;border-color:var(--lesson-error-border)!important;opacity:1!important}
.live-lesson.dark-theme .attempt-symbols span[data-result=correct],.live-lesson.dark-theme .attempt-history-row>[data-result=correct]{color:var(--lesson-success-ink)}
.live-lesson.dark-theme .attempt-symbols span[data-result=wrong],.live-lesson.dark-theme .attempt-history-row>[data-result=wrong]{color:var(--lesson-error-ink)}
.live-lesson.dark-theme :is(.attempt-tooltip,.teacher-answer-hint){background:var(--ui-soft);color:var(--ui-ink);border-color:var(--ui-accent)}
.live-lesson.dark-theme #student-sections{border-color:var(--ui-border)}
.live-lesson.dark-theme #student-sections button{background:transparent;color:var(--ui-muted)}
.live-lesson.dark-theme #student-sections button:hover{background:var(--ui-soft);color:var(--ui-ink)}
.live-lesson.dark-theme #student-sections [aria-current=true]{background:var(--lesson-selected);color:#eef6eb}
.live-lesson.dark-theme :is(.ui-audio-player,.audio-transcript,.drawing-palette,.comment-message,.setup-camera){background:var(--lesson-input);border-color:var(--ui-border);color:var(--ui-ink)}
.live-lesson.dark-theme .comment-message[data-own=true]{background:var(--lesson-selected)}
.live-lesson.dark-theme .comment-message small{color:var(--ui-accent)}
.live-lesson.dark-theme :is(.ui-audio-seek,.ui-audio-volume,input[type=range],input[type=checkbox],input[type=radio]){accent-color:var(--ui-accent)}
.live-lesson.dark-theme .drawing-color{background:var(--drawing-color)!important;border-color:var(--ui-surface)!important}
.live-lesson.dark-theme .video-tile{background:#101713;border-color:var(--ui-border)}
.live-lesson.dark-theme .video-tile figcaption{background:#101713cc;color:#eff5f0}
.live-lesson.dark-theme #lesson .teacher-note[data-note-color=green]{background:#243e2d;border-color:#526e59}
.live-lesson.dark-theme #lesson .teacher-note[data-note-color=yellow]{background:#423c24;border-color:#807243}
.live-lesson.dark-theme #lesson .teacher-note[data-note-color=blue]{background:#25394b;border-color:#4a728b}
.live-lesson.dark-theme #lesson .teacher-note[data-note-color=red]{background:#472d2c;border-color:#8c5653}
.live-lesson.dark-theme :is(.translation-source,.attempt-history-row){border-color:var(--ui-border)}
.live-lesson.dark-theme dialog::backdrop{background:#080e0bbb;backdrop-filter:blur(3px)}
.live-lesson.dark-theme :is(button,summary,a,input,select,textarea):focus-visible{outline-color:var(--ui-focus)}
.live-lesson.dark-theme .exercise .exercise-ghost{color:var(--ui-muted);background:transparent;border-color:var(--ui-border)}
body.live-lesson.dark-theme #lesson .exercise[data-auto-check=true]{background:var(--ui-surface)!important}
body.live-lesson.dark-theme #lesson-toolbar button,body.live-lesson.dark-theme #call-settings{background:var(--lesson-input);color:var(--ui-ink);border-color:var(--ui-border)}
body.live-lesson.dark-theme #lesson-toolbar button:hover{background:var(--ui-soft)}
body.live-lesson.dark-theme .attempt-symbols [data-result=correct]{color:var(--lesson-success-ink)!important}
body.live-lesson.dark-theme .attempt-symbols [data-result=wrong]{color:var(--lesson-error-ink)!important}
body.live-lesson.dark-theme .attempt-symbols:hover{background:var(--ui-soft)!important}
body.live-lesson.dark-theme #call-settings-panel,body.live-lesson.dark-theme #empty-material{background:var(--ui-surface);color:var(--ui-ink);border-color:var(--ui-border)}
body.live-lesson.dark-theme #lesson [data-result=correct]{background-color:var(--lesson-success-bg)!important;border-color:var(--lesson-success-border)!important;color:var(--lesson-success-ink)}
body.live-lesson.dark-theme #lesson [data-result=wrong]{background-color:var(--lesson-error-bg)!important;border-color:var(--lesson-error-border)!important;color:var(--lesson-error-ink)}
body.live-lesson.dark-theme #lesson :is(.answer-feedback,.attempt-symbols span,.sentence-slot)[data-result]{background:transparent!important;border-color:transparent!important}

/* Stack images retain their proportions with a 15% taller display limit. */
.live-lesson .exercise[data-block-type=image] .lesson-image-figure:not(.image-carousel-track > *) .lesson-image{max-height:483px}
.live-lesson .exercise>.teacher-actions{margin:0 0 16px;padding:0;border:0}
.live-lesson .exercise>.teacher-actions:has(>button:not([hidden])){display:flex;justify-content:flex-end}
/* Materials catalog: shared page and in-lesson picker. */
.materials-screen{background:#f7f8f4}
.materials-screen .home.dashboard.catalog-design{max-width:1200px;width:calc(100% - 64px);padding:48px 0 64px}
.catalog-design{--catalog-ink:#14251e;--catalog-muted:#5e7369;--catalog-line:#d6e3d9;color:var(--catalog-ink)}
.catalog-design .library-heading{margin:0 0 76px;display:flex;flex-direction:row;justify-content:space-between;align-items:center;gap:24px}
.catalog-design .library-heading h1{font-size:48px;line-height:1.17;letter-spacing:-1.2px;margin:0;overflow-wrap:anywhere}
.catalog-design #catalog-top-actions{display:flex;align-items:center;gap:10px;margin:0;flex-shrink:0}
.catalog-design .catalog-create-course{min-height:48px;padding:12px 20px;border-radius:14px;background:var(--ui-accent);color:white;border:0;font-weight:700}
.catalog-design .library-search{display:block;margin:0 0 40px;max-width:none;position:relative}
.catalog-design .catalog-search-label{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
.catalog-design .library-search:before{content:'⌕';position:absolute;left:20px;top:13px;font-size:24px;color:var(--catalog-muted)}
.catalog-design #library-search{height:58px;width:100%;max-width:none;box-sizing:border-box;padding:16px 20px 16px 52px;border:1px solid var(--catalog-line);border-radius:16px;background:white;color:var(--catalog-ink);font:inherit;font-size:15px}
.catalog-design #library-search::placeholder{color:var(--catalog-muted)}
.catalog-design .library-group{margin:0 0 28px}.catalog-design .library-group>h2{font-size:22px;line-height:28px;margin:0 0 24px}.catalog-count{float:right;font-size:13px;color:var(--catalog-muted);padding-top:5px}
.catalog-design .catalog-grid,#class-catalog.catalog-design .catalog-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:20px 24px;margin-top:0}
.catalog-course{position:relative;min-width:0;border:1px solid var(--catalog-line);border-radius:18px;background:white;box-shadow:0 8px 20px #12261c14;transition:box-shadow .15s,transform .15s}
.catalog-course:hover{box-shadow:0 10px 24px #12261c20;transform:translateY(-2px)}
.catalog-course-link{display:block;color:var(--catalog-ink)!important;text-decoration:none;border-radius:18px;overflow:hidden}
.catalog-course-cover{height:132px;box-sizing:border-box;padding:30px 20px 14px;background:#e8f2eb;display:flex;flex-direction:column;align-items:flex-start;justify-content:space-between}
.catalog-course:nth-child(4n+2) .catalog-course-cover{background:#e8e5f7}.catalog-course:nth-child(4n+3) .catalog-course-cover{background:#fae8db}.catalog-course:nth-child(4n) .catalog-course-cover{background:#f2ebd9}
.catalog-course-cover>img{display:block;max-width:none;flex-shrink:0}.catalog-course-cover small{font-size:10px;letter-spacing:1.2px;font-weight:700;color:#1f4f43b3}
.catalog-course-content{padding:18px;min-height:136px;box-sizing:border-box;display:flex;flex-direction:column;gap:24px}.catalog-course h3{font-size:16px;line-height:22px;letter-spacing:-.2px;margin:0;font-weight:700;overflow-wrap:anywhere}
.catalog-course-meta{display:flex;justify-content:space-between;gap:8px;margin-top:auto;font-size:12px;color:#1f4f43}.catalog-course-meta time{color:var(--catalog-muted);font-size:11px}
.catalog-course>.catalog-menu{position:absolute;right:10px;top:10px}.catalog-course>.catalog-menu>summary{background:#ffffffd9;border:1px solid var(--catalog-line);width:32px;height:32px;min-height:32px;min-width:32px;padding:0}.catalog-course>.catalog-menu[open]{box-shadow:0 8px 24px #12261c20;padding:6px;background:white}
.catalog-design.catalog-inside .library-heading{margin-bottom:28px}.catalog-design.catalog-inside .library-heading h1{font-size:32px;letter-spacing:-.6px}.catalog-design .library-eyebrow{font-size:14px;color:var(--catalog-muted);line-height:1.6;max-width:640px}
.catalog-design.catalog-inside #material-list{background:white;border:1px solid var(--catalog-line);border-radius:20px;padding:28px}
.catalog-design .catalog-grid:has(>.library-row),.catalog-design .catalog-modules>.catalog-grid,#class-catalog.catalog-design .catalog-grid:has(>.library-row),#class-catalog.catalog-design .catalog-modules>.catalog-grid{display:flex;flex-direction:column;gap:0}
.catalog-design .library-row.catalog-card{display:flex;flex-direction:row;align-items:center;gap:16px;min-height:76px;padding:16px 8px;border:0;border-bottom:1px solid #e9eee9;border-radius:0;box-shadow:none;background:transparent}
.catalog-design .library-row.catalog-card>div:not(.library-row-actions){flex:1;min-width:0}.catalog-design .library-row.catalog-card>div>span{font-size:15px;line-height:1.5;font-weight:600}.catalog-design .library-row.catalog-card small{font-size:12px;margin-top:4px;color:var(--catalog-muted)}
.catalog-design .library-row .catalog-symbol{background:#edf3eb;border-radius:10px;padding:12px;font-size:22px}.catalog-design .library-row .lesson-type{display:none}.catalog-design .library-row .library-row-actions{margin:0;flex-shrink:0;gap:8px}.catalog-design .library-row .library-row-actions>a{font-size:13px;background:#f1f5ef;color:var(--catalog-ink);padding:8px 12px}
.catalog-design .catalog-modules .library-module{border-bottom:1px solid var(--catalog-line);padding:0 0 16px;margin-bottom:20px}.catalog-design .catalog-modules .library-module>summary{padding:16px 8px;font-size:18px;font-weight:700;cursor:pointer}.catalog-design .library-module>.catalog-grid{padding-left:24px}.catalog-design .library-module>p{color:var(--catalog-muted);font-size:14px}.catalog-module-actions{margin:0 8px 12px;color:var(--catalog-muted);font-size:12px}.catalog-module-actions summary{cursor:pointer}.catalog-module-actions .teacher-actions{display:flex;gap:8px;flex-wrap:wrap;padding:12px 0}
#class-catalog.catalog-design .library-heading{display:flex;margin:24px 0}#class-catalog.catalog-design .library-heading h1{font-size:28px}#class-catalog.catalog-design #catalog-top-actions{display:none}.catalog-design #library-breadcrumb{font-size:14px;margin:0 0 24px}.catalog-design #library-breadcrumb a{color:var(--ui-accent)}
.catalog-design :is(button,a,summary,input):focus-visible{outline:2px solid var(--ui-accent);outline-offset:3px}.catalog-design button:disabled{opacity:.5;cursor:wait}.catalog-design #account-status:empty{display:none}
body.live-lesson.dark-theme #class-catalog.catalog-design{--catalog-ink:var(--ui-ink);--catalog-muted:var(--ui-muted);--catalog-line:var(--ui-border)}
body.live-lesson.dark-theme #class-catalog :is(.catalog-course,.catalog-course-content,#material-list,#library-search){background:var(--ui-surface);color:var(--ui-ink)}
body.live-lesson.dark-theme #class-catalog .catalog-course-meta{color:var(--ui-accent)}
@media(max-width:1100px){.catalog-design .catalog-grid,#class-catalog.catalog-design .catalog-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:800px){.catalog-design .catalog-grid,#class-catalog.catalog-design .catalog-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.catalog-design .library-heading{margin-bottom:36px;flex-wrap:wrap}.catalog-design.catalog-inside #material-list{padding:18px}.catalog-design .library-heading h1{font-size:36px}}
@media(max-width:520px){.materials-screen .home.dashboard.catalog-design{width:calc(100% - 32px);padding-top:28px}.catalog-design .catalog-grid,#class-catalog.catalog-design .catalog-grid{grid-template-columns:1fr}.catalog-design .library-heading h1{font-size:32px}.catalog-design .library-row.catalog-card{flex-wrap:wrap}.catalog-design .library-row .library-row-actions{margin-left:auto}.catalog-design .library-module>.catalog-grid{padding-left:8px}.catalog-design.catalog-inside #material-list{padding:12px}.catalog-design #catalog-top-actions{flex-wrap:wrap;flex-shrink:1}}
.catalog-design .catalog-course>a.catalog-course-link{display:block;width:100%;min-height:0;box-sizing:border-box;padding:0;margin:0;border:0;border-radius:18px;background:transparent;text-align:left;white-space:normal;font-weight:inherit;box-shadow:none}
.catalog-design .catalog-course>a.catalog-course-link:hover{background:transparent}
.catalog-design #catalog-top-actions>a{border-radius:12px;padding:10px 16px;font-size:14px;border:1px solid var(--catalog-line)}
#class-catalog.catalog-design #library-search{padding:16px 20px 16px 52px}
#class-catalog.catalog-design .library-row-actions a{text-decoration:none}
.live-lesson .block-focus-button{order:7;position:relative;display:grid;place-items:center;flex:0 0 34px;width:34px;height:34px;min-height:34px;padding:0;border:1px solid var(--ui-border);border-radius:10px;background:var(--ui-surface);color:var(--ui-accent);font-size:25px;line-height:1;cursor:pointer;margin-left:auto}
.live-lesson .block-focus-button[hidden]{display:none}.live-lesson .block-focus-button~.block-comment-button{margin-left:0}.live-lesson .block-focus-button:hover{background:var(--ui-soft,#eef3eb)}
.block-focus-button:after{content:attr(data-tooltip);display:none;position:absolute;right:0;top:calc(100% + 9px);width:max-content;max-width:250px;padding:9px 12px;white-space:normal;border:1px solid var(--ui-border);border-radius:9px;background:var(--ui-surface,#fff);color:var(--ui-ink);font:500 13px/1.4 Manrope,sans-serif;z-index:80;box-shadow:0 5px 20px #0002;pointer-events:none}
.block-focus-button:hover:after,.block-focus-button:focus-visible:after{display:block}
.element-answer-tooltip{position:fixed;z-index:9000;max-width:min(360px,calc(100vw - 32px));padding:10px 14px;border:1px solid var(--ui-accent);border-radius:10px;background:var(--ui-surface,#fff);color:var(--ui-ink);font-size:15px;font-weight:600;line-height:1.5;box-shadow:0 8px 24px #0002;pointer-events:none;overflow-wrap:anywhere}
.element-answer-tooltip[hidden]{display:none}
.live-lesson .exercise .answer-unit{gap:4px!important}.live-lesson .exercise .answer-feedback{order:10;flex:0 0 16px!important;width:16px!important;min-width:16px;margin:0!important}
.live-lesson .exercise .answer-feedback .attempt-symbols{gap:0;width:16px!important;min-width:16px!important;max-width:16px!important;height:32px!important;min-height:32px!important;padding:1px!important}
.live-lesson .exercise .attempt-symbols span{flex:0 0 10px;height:10px;line-height:10px;font-size:12px;min-width:12px}.live-lesson .exercise .attempt-symbols span[data-result=wrong]{font-size:15px}
.live-lesson .exercise .attempt-symbols:has(>span:only-child){height:18px!important;min-height:18px!important}
.exercise-drop-line{background:var(--ui-accent,#6d9168);border-radius:3px;box-shadow:0 0 0 1px var(--ui-surface,#fff)}
.live-lesson .lesson-theme-toggle{margin-top:12px;padding:8px 14px;min-height:36px;border:1px solid var(--ui-border);border-radius:10px;background:var(--ui-surface,#fff);color:var(--ui-ink);font:inherit;font-size:14px;cursor:pointer}

.live-lesson #lesson .exercise .block-focus-button{font-size:25px;padding:0;line-height:1}
/* Class cards, matching the Students Figma layout. */
body.classes-design{background:#f7f8f4}.classes-design .shell-content{max-width:1248px;padding:58px 32px 72px}.classes-design .work-heading{position:relative;display:flex;flex-direction:column;gap:14px;margin-bottom:52px;padding-right:180px}.classes-design .work-heading h1{order:-1;font-size:46px;line-height:52px;margin:0}.classes-design .work-heading #work-date{font-size:16px;color:#637369;margin:0}.classes-design .work-heading #create-room{position:absolute;right:0;top:10px;min-height:44px;padding:12px 20px;border-radius:12px;background:var(--ui-accent);color:white;font-size:13px;font-weight:700}.classes-design #students-heading{font-size:14px;color:#637369;font-weight:500}.classes-design #room-list{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;margin:0}.classes-design #room-list .work-row,.classes-design .class-add-card{position:relative;display:flex;flex-direction:column;align-items:stretch;justify-content:flex-start;min-height:250px;box-sizing:border-box;padding:32px 20px 20px;border:1px solid #d6e3d9;border-radius:18px;background:white;box-shadow:0 6px 18px #12261c0f;gap:0;margin:0;min-width:0}.classes-design .work-details{padding-right:36px}.classes-design .work-details h3{font-size:20px;line-height:26px;font-weight:700;overflow-wrap:anywhere}.classes-design .work-details p{font-size:14px;line-height:22px;color:#637369;margin-top:8px;overflow-wrap:anywhere}.classes-design .class-presence{display:flex;align-items:center;gap:6px;font-size:12px;color:#738078;margin-top:16px}.classes-design .class-presence[data-online=true]{color:#1f4f42}.class-presence img{display:block;max-width:none;flex-shrink:0}.classes-design .work-actions{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:auto;padding-top:24px}.classes-design .work-actions .work-continue,.classes-design .work-actions .copy-invite{min-height:34px;box-sizing:border-box;border-radius:10px;font-size:12px;padding:8px 12px;margin:0;text-align:center;white-space:nowrap;text-decoration:none}.classes-design .work-actions .work-continue{background:#e5f2eb;color:#1f4f42;min-width:104px;border:0}.classes-design .work-actions .copy-invite{background:white;border:1px solid #d6e3d9;color:#1f4f42}.classes-design .student-menu{position:absolute;right:20px;top:20px}.classes-design .student-menu summary{height:36px;width:36px;min-width:36px;padding:0;box-sizing:border-box;border-radius:50%;background:#e5f2eb;color:#637369}.classes-design .class-add-card{padding:22px;background:#e5f2eb;text-align:left;cursor:pointer;color:#17241c;box-shadow:none;font:inherit}.classes-design .class-add-card>span{width:44px;height:44px;display:grid;place-items:center;background:white;border-radius:50%;font-size:24px;color:#1f4f42;margin-bottom:24px}.classes-design .class-add-card strong{font-size:19px}.classes-design .class-add-card p{font-size:13px;line-height:18px;color:#637369;margin-top:10px}.classes-design .class-add-card b{font-size:14px;color:#1f4f42;margin-top:auto;padding-top:20px}.classes-design .class-add-card:hover{background:#dcece1}.classes-design .work-row:hover{border-color:#a8c3ad}.classes-design :is(button,a,summary):focus-visible{outline:2px solid var(--ui-accent);outline-offset:3px}
@media(max-width:1150px){.classes-design #room-list{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:850px){.classes-design #room-list{grid-template-columns:repeat(2,minmax(0,1fr))}.classes-design .shell-content{padding:32px 20px}.classes-design .work-heading{padding-right:0}.classes-design .work-heading #create-room{position:static;align-self:flex-start}}@media(max-width:550px){.classes-design #room-list{grid-template-columns:1fr}.classes-design .work-heading h1{font-size:36px}.classes-design .work-heading{margin-bottom:32px}}
/* Audio controls share the lesson surface in both themes. */
.live-lesson #lesson .lesson-audio{padding:16px;border:1px solid var(--ui-border);border-radius:18px;background:var(--ui-surface,#fff);gap:14px}
.live-lesson #lesson .ui-audio-player{margin:0;padding:16px;border-radius:14px;background:var(--ui-soft,#f1f5ef);border:0;gap:14px;grid-template-columns:44px minmax(60px,1fr) auto}
.live-lesson #lesson .ui-audio-player .ui-audio-play{width:44px;height:44px;padding:0;border-radius:50%;background:var(--ui-accent);color:var(--ui-surface,#fff);border:0;font-size:18px}
.live-lesson #lesson .ui-audio-player .ui-audio-rate{border-radius:9px;padding:6px 10px;min-height:32px;background:var(--ui-surface,#fff)}
.live-lesson #lesson .ui-audio-player .ui-audio-rate[aria-pressed=true]{background:var(--ui-accent);color:var(--ui-surface,#fff)}
.live-lesson #lesson .lesson-audio details{padding:12px 14px;border:1px solid var(--ui-border);border-radius:12px;background:var(--ui-surface,#fff)}
.live-lesson #lesson .lesson-audio summary{background:transparent;cursor:pointer;font-size:14px;color:var(--ui-ink)}
.live-lesson #lesson .audio-transcript{margin-top:12px;border:0;padding:0;background:transparent;color:var(--ui-ink);font-size:15px;line-height:1.7}
.live-lesson #lesson .audio-toolbar{gap:8px}.live-lesson #lesson .audio-toolbar button{border-radius:10px;font-size:13px;min-height:36px;padding:8px 12px}.live-lesson #lesson .audio-listen-mode[aria-pressed=true]{background:var(--ui-soft,#edf3e9);border-color:var(--ui-accent);color:var(--ui-ink)}
@media(max-width:520px){.live-lesson #lesson .lesson-audio{padding:10px}.live-lesson #lesson .ui-audio-player{gap:8px;padding:12px;grid-template-columns:40px minmax(40px,1fr)}.live-lesson #lesson .ui-audio-time{grid-column:2;text-align:right}.live-lesson #lesson .ui-audio-rates{grid-column:1/-1}}
.classes-design .work-details{flex:0 0 auto}.classes-design .work-actions{width:100%;box-sizing:border-box;padding-left:0}.classes-design #students-heading{position:static;width:auto;height:auto;clip-path:none;overflow:visible;display:block}.classes-design .section-heading{display:flex!important}.classes-design .work-heading #create-room{background:#1f4f42;opacity:1}.classes-design .shell-content{box-sizing:border-box;width:100%}
body.live-lesson.dark-theme #lesson .teacher-note:not([data-note-color]),body.live-lesson.dark-theme #lesson .teacher-note[data-note-color=neutral]{background:var(--ui-surface);color:var(--ui-ink);border-color:var(--ui-border)}
body.live-lesson.dark-theme #lesson .teacher-note p{color:var(--ui-ink)}
/* Homework workspace uses the same cards and controls as the live lesson. */
body.assignment-open #lesson>.exercises,body.assignment-open #lesson-title,body.assignment-open #lesson-course-title,body.assignment-open #empty-material{display:none!important}
#assignment-panel{min-width:0;scroll-margin-top:24px}#assignment-panel[hidden]{display:none}.assignment-heading{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:24px}.assignment-heading h2{width:100%;font-size:28px;line-height:1.3;margin:4px 0;overflow-wrap:anywhere}.assignment-heading>button:first-child{background:transparent;border:0;padding-left:0;color:var(--ui-muted)}.assignment-status{padding:6px 10px;border-radius:20px;background:var(--ui-soft,#edf3eb);color:var(--ui-ink);font-size:12px;font-weight:650}.assignment-status[data-status=submitted]{background:#e7eef9;color:#355c91}.assignment-status[data-status=needs_revision]{background:#fff0d8;color:#805514}.assignment-status[data-status=accepted]{background:#dfefdf;color:#346641}.assignment-save-state{font-size:12px;color:var(--ui-muted);margin-left:auto}.assignment-description{color:var(--ui-muted);font-size:14px;line-height:1.6;margin:0 0 24px}.assignment-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.assignment-list-card{position:relative;display:flex;flex-direction:column;gap:16px;align-items:flex-start;text-align:left;padding:24px;min-height:170px;border:1px solid var(--ui-border);border-radius:18px;background:var(--ui-surface,#fff);color:var(--ui-ink);font:inherit;cursor:pointer}.assignment-list-card:hover{border-color:var(--ui-accent);box-shadow:0 6px 20px #0001}.assignment-list-card strong{font-size:18px;overflow-wrap:anywhere}.assignment-list-card small{color:var(--ui-muted);font-size:12px;margin-top:auto}.assignment-new{color:var(--ui-accent);font-size:12px;font-weight:700}.assignment-empty{padding:36px 24px;border:1px dashed var(--ui-border);border-radius:18px;text-align:center;color:var(--ui-muted);line-height:1.6}.assignment-empty h3{color:var(--ui-ink)}.assignment-feedback,.assignment-review{padding:24px;margin:0 0 24px;border:1px solid var(--ui-border);border-radius:18px;background:var(--ui-surface,#fff)}.assignment-feedback p{white-space:pre-wrap;line-height:1.6}.assignment-exercises{display:grid;gap:24px;margin-bottom:24px}.assignment-exercises .exercise{padding:28px!important}.assignment-review textarea,#assignment-panel>input{display:block;width:100%;box-sizing:border-box;padding:12px 14px;border:1px solid var(--ui-border);border-radius:12px;background:var(--ui-surface,#fff);color:var(--ui-ink);font:inherit;margin:12px 0 18px}.assignment-review-choices{display:flex;flex-direction:column;gap:12px;margin:20px 0}.assignment-review-choices label{display:flex;align-items:center;gap:10px;font-size:14px}.assignment-review>button{margin:0 10px 8px 0}.assignment-draft-items{display:grid;gap:10px;margin:20px 0}.assignment-draft-row{display:flex;align-items:center;gap:8px;padding:14px;border:1px solid var(--ui-border);border-radius:12px;background:var(--ui-surface,#fff)}.assignment-draft-row label{display:flex;gap:10px;align-items:center;flex:1;min-width:0;overflow-wrap:anywhere}.assignment-draft-row button{padding:6px 10px;min-height:32px}.assignment-error{color:var(--ui-danger,#b94d45);font-size:14px;line-height:1.5}.assignment-error:empty{display:none}.assignment-revise-tag{font-size:12px;color:#805514;background:#fff0d8;border-radius:8px;padding:8px 12px;display:inline-block}.assignment-submit{margin-bottom:24px}#homework-nav{display:block;width:100%;text-align:left;padding:12px 14px;margin-top:16px;border:1px solid var(--ui-border);border-radius:12px;background:var(--ui-surface,#fff);color:var(--ui-ink);font:inherit;font-size:14px;cursor:pointer}#homework-nav.has-new:after{content:'';display:inline-block;width:7px;height:7px;margin-left:8px;border-radius:50%;background:var(--ui-accent)}#homework-nav[aria-current=true]{background:var(--ui-soft,#edf3eb);border-color:var(--ui-accent)}.homework-pending{font-size:12px;color:#355c91;margin-top:10px}.assignment-draft-row input,.assignment-review input{accent-color:var(--ui-accent)}
body.live-lesson.dark-theme .assignment-status[data-status=submitted]{background:#263e54;color:#c2d7fa}body.live-lesson.dark-theme :is(.assignment-status[data-status=needs_revision],.assignment-revise-tag){background:#493d24;color:#efd5a4}body.live-lesson.dark-theme .assignment-status[data-status=accepted]{background:#284531;color:#b8dbbb}
@media(max-width:600px){.assignment-list{grid-template-columns:1fr}.assignment-heading h2{font-size:24px}.assignment-exercises .exercise{padding:18px!important}.assignment-review,.assignment-feedback{padding:18px}}
.assignment-draft-row label,.assignment-review-choices label{line-height:1.5;overflow-wrap:anywhere}.assignment-draft-row input[type=checkbox],.assignment-review input[type=checkbox]{appearance:none;flex:0 0 20px;width:20px;height:20px;margin:0;border:1px solid var(--ui-border);border-radius:6px;background:var(--ui-surface,#fff);display:grid;place-items:center;cursor:pointer}.assignment-draft-row input:checked,.assignment-review input:checked{background:var(--ui-accent);border-color:var(--ui-accent)}.assignment-draft-row input:checked:after,.assignment-review input:checked:after{content:'';width:5px;height:10px;border:solid white;border-width:0 2px 2px 0;transform:rotate(45deg) translate(-1px,-1px)}#assignment-panel button:disabled{opacity:.55;cursor:default}#assignment-panel :is(button,input,textarea):focus-visible,#homework-nav:focus-visible{outline:2px solid var(--ui-accent);outline-offset:3px}#assignment-panel>button{margin-right:10px;margin-bottom:12px}.assignment-list-card:active{transform:translateY(1px)}
@media(max-width:760px){#homework-nav{display:none}#mobile-section-dialog #homework-nav{display:block}}
body.live-lesson.dark-theme #lesson #assignment-panel .exercise:not(.teacher-note){background:var(--ui-surface)!important;color:var(--ui-ink);border-color:var(--ui-border)}