:root{color:#213547;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;background-color:#fff;font-family:Arial,sans-serif}*{box-sizing:border-box}body{min-width:0;min-height:100vh;margin:0}button,select{font:inherit}button{cursor:pointer}:focus-visible{outline-offset:4px;outline:3px solid #245b9e}.sr-only{clip-path:inset(50%);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.lessons-page{overflow-wrap:anywhere;max-width:760px;margin:0 auto;padding:40px 24px 80px}.lessons-back{color:#607a70;margin-bottom:32px;font-size:13px;text-decoration:none;display:inline-block}.lessons-page h1{margin:0 0 36px;font-size:30px;line-height:1.6}.lessons-list{gap:12px;display:grid}.lessons-list>a{color:#33483e;border-bottom:1px solid #e3e9e6;justify-content:space-between;gap:16px;padding:24px 0;font-size:18px;text-decoration:none;display:flex}.lesson-content p{white-space:pre-wrap;margin:24px 0;line-height:2}.lesson-content h2{margin:40px 0 20px;font-size:24px}.lesson-content h3{margin-top:32px;font-size:20px}.lesson-content figure{margin:32px 0}.lesson-content img{object-fit:contain;max-width:100%;max-height:700px;margin:auto;display:block}.lesson-content figcaption{color:#7d8983;text-align:center;white-space:pre-wrap;margin-top:12px;font-size:12px}@media (width<=600px){.lessons-page{padding:24px 16px 60px}.lessons-page h1{font-size:26px}}.lessons-page h1:focus{outline:none}.faq-list{border-top:1px solid #e3e9e6}.faq-list>details{border-bottom:1px solid #e3e9e6;padding:22px 0}.faq-list summary{cursor:pointer;font-size:17px;font-weight:600;line-height:1.8}.faq-list p{white-space:pre-wrap;margin:18px 0 0;padding-left:20px;line-height:1.9}.faq-page h1:focus{outline:none}.admin-faq-form{max-width:660px;margin:24px auto}.admin-faq-form>label{margin:24px 0}.admin-faq-form textarea{resize:vertical;min-height:90px;line-height:1.8}.admin-faq-form textarea[name=answer]{min-height:220px}.admin-faq-form .admin-check{align-items:center;gap:8px;display:flex}.admin-faq-form input[type=checkbox]{accent-color:#2c695b}.admin-faq-danger{max-width:660px;margin:32px auto}.admin-tabs{flex-wrap:wrap}.faq-footer{margin:36px auto 16px;font-size:14px}.faq-footer a{color:#607a70}#root{width:100%;min-height:100vh}.app{text-align:center;box-sizing:border-box;max-width:900px;margin:0 auto;padding:24px}.theme-list{flex-direction:column;gap:16px;max-width:650px;margin:40px auto;display:flex}.theme-card{color:#222;text-align:left;cursor:pointer;background:#fff;border:2px solid #ccc;border-radius:12px;flex-direction:column;align-items:flex-start;gap:8px;width:100%;padding:24px;display:flex}.theme-card:hover{background:#f5f5f5;border-color:#555}.theme-name{font-size:20px;font-weight:700}.theme-description{color:#666;font-size:14px}.theme-status{color:#666;font-size:13px}.settings-panel{max-width:600px;margin:30px auto}.setting-row{justify-content:space-between;align-items:center;gap:16px;margin:20px 0;display:flex}.setting-row select{padding:10px;font-size:16px}.start-button{width:100%;margin-top:30px;padding:16px;font-size:18px}.back-button{margin-bottom:24px;display:block}.image-container{background:#eee;border-radius:12px;justify-content:center;align-items:center;height:60vh;margin:24px 0;display:flex}.image-container img{object-fit:contain;max-width:100%;max-height:100%}.controls{flex-wrap:wrap;justify-content:center;gap:16px;margin-top:16px;display:flex}button{cursor:pointer;padding:12px 24px;font-size:16px}@media (width<=600px){.app{padding:16px}.theme-card{padding:20px}.setting-row{flex-direction:column;align-items:stretch}}.app:has(.practice-screen){max-width:1100px;height:auto;min-height:100dvh;margin:0 auto;padding:12px;display:block;overflow:visible}.app:has(.practice-screen)>h1{display:none}.practice-screen{flex-direction:column;height:auto;min-height:0;display:flex}.practice-header{flex-shrink:0;padding:8px 0}.practice-content{flex:none;justify-content:center;align-items:center;height:min(65dvh,650px);min-height:0;display:flex;overflow:hidden}.practice-image{justify-content:center;align-items:center;width:100%;height:100%;min-height:0;display:flex}.practice-image img{object-fit:contain;width:auto;max-width:100%;height:auto;max-height:100%;display:block}.practice-bottom{flex-shrink:0;padding:12px 0 24px}.practice-timer{margin-bottom:12px}@media (width<=600px){.practice-content{height:55dvh}}.countdown-screen{flex-direction:column;justify-content:center;align-items:center;min-height:70dvh;display:flex}.countdown-screen h2{font-size:20px;font-weight:400}.countdown-number{font-size:120px;font-weight:700;line-height:1.2}.practice-single{display:contents}.practice-pair{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px;width:100%;height:100%;display:grid}.practice-pair figure{flex-direction:column;align-items:center;min-width:0;min-height:0;margin:0;display:flex}.practice-pair figure img{object-fit:contain;flex:1;width:100%;max-width:100%;min-height:0}.practice-pair figcaption{color:#777;flex-shrink:0;padding:6px 0;font-size:12px}@media (width<=600px){.practice-pair{gap:8px}}.admin-tabs{border-bottom:1px solid #e4e9e9;gap:6px;margin-top:20px;padding-bottom:10px;display:flex}.admin-tabs button{color:#7c8b8f;border:0;font-size:13px}.admin-tabs button[aria-pressed=true]{color:#235f52;background:#eaf2ef}.admin-article-editor .admin-editor-heading h2{font-size:20px}.admin-article-editor .admin-editor-heading .admin-hint{margin-top:6px}.admin-new-article{margin-top:12px}.admin-article-preview{overflow-wrap:anywhere;max-width:660px;margin:0 auto 24px;padding:20px 0}.admin-article-preview h1{margin:0 0 30px;font-size:28px}.admin-article-preview h2{margin:28px 0 16px;font-size:22px}.admin-article-preview h3{font-size:18px}.admin-article-preview p{white-space:pre-wrap;line-height:1.9}.admin-article-preview figure{margin:24px 0}.admin-article-preview img{object-fit:contain;max-width:100%;max-height:480px;margin:auto;display:block}.admin-article-preview figcaption{color:#7c8b8f;text-align:center;white-space:pre-wrap;margin-top:10px;font-size:12px}.writing-header-actions{align-items:center;gap:10px;display:flex}.writing-header-actions>button:first-child{color:#78888b;border:0;font-size:12px}.writing-title,.writing-canvas{max-width:660px;margin:0 auto}.writing-title{margin-bottom:24px;padding-top:28px}.admin-panel .writing-text{resize:none;width:100%;box-shadow:none;color:#303b3e;background:0 0;border:0;border-radius:0;margin:0;padding:0;line-height:1.9;display:block;overflow:hidden}.admin-panel .writing-text:focus-visible{outline:none}.admin-panel .writing-text:focus{box-shadow:-2px 0 #b5d5c9}.admin-panel .writing-title .writing-text{font-size:30px;font-weight:700;line-height:1.55}.writing-text::placeholder{color:#b2bdbd}.writing-block{padding:4px 0;position:relative}.writing-block-controls{opacity:0;pointer-events:none;z-index:2;background:#fff;border-radius:4px;align-items:center;gap:6px;min-height:28px;transition:opacity .12s;display:flex;position:absolute;top:-24px;left:-32px;right:0}.writing-block:hover .writing-block-controls,.writing-block:focus-within .writing-block-controls{opacity:1;pointer-events:auto}.admin-panel .writing-block-controls select{color:#83908e;background:0 0;border:0;width:auto;max-width:190px;margin:0;padding:3px 5px;font-size:11px}.writing-block-controls details{margin-left:auto;position:relative}.writing-block-controls summary{padding:2px 8px;font-size:18px;list-style:none}.writing-block-controls details[open]{z-index:4}.writing-block-menu{background:#fff;border:1px solid #e1e7e5;border-radius:8px;min-width:130px;padding:8px;position:absolute;top:100%;right:0;box-shadow:0 5px 18px #223c3214}.writing-block-menu>button{text-align:left;border:0;width:100%;font-size:12px;display:block}.admin-panel .writing-paragraph{font-size:16px}.admin-panel .writing-heading{font-weight:650;line-height:1.65}.admin-panel .writing-h2{font-size:24px}.admin-panel .writing-h3{font-size:20px}.writing-insertion{align-items:center;gap:8px;height:20px;display:flex;position:relative}.admin-panel .writing-plus{color:#7e9c90;opacity:.25;border-color:#d9e3de;border-radius:50%;width:28px;height:28px;padding:0;font-size:18px}.writing-insertion:hover .writing-plus,.writing-insertion:focus-within .writing-plus{opacity:1}.writing-insert-menu{z-index:4;background:#fff;border:1px solid #e1e7e5;border-radius:8px;gap:4px;width:max-content;max-width:calc(100% - 36px);padding:5px;display:flex;position:absolute;top:50%;left:36px;transform:translateY(-50%);box-shadow:0 4px 12px #223c3210}.writing-insert-menu button{white-space:nowrap;border:0;flex:1;min-width:0;padding:4px 6px;font-size:12px}.admin-panel .writing-start{text-align:left;color:#b2bdbd;background:0 0;border:0;width:100%;padding:24px 0 60px;font-size:17px;display:block}.writing-help{color:#9ba8a5;margin:32px 0;font-size:11px;line-height:1.8}.writing-image{margin:0}.writing-image>img{object-fit:contain;width:100%;max-height:440px;margin:12px auto;display:block}.writing-image-picker{padding:10px 0}.writing-image-picker summary{color:#86a397;font-size:12px}.writing-image-picker[open]{background:#f7f9f8;border-radius:8px;padding:16px}.admin-panel .writing-caption{text-align:center;color:#87958f;font-size:12px}.admin-article-editor>.admin-hint,.admin-article-editor>.admin-danger-zone{max-width:660px;margin:24px auto}@media (width<=800px){.writing-header-actions{gap:2px}.writing-header-actions>button:first-child{padding:6px}.admin-article-editor .admin-editor-heading h2{font-size:17px}.admin-panel .writing-title .writing-text{font-size:27px}.writing-block-controls{opacity:1;pointer-events:auto;position:relative;top:auto;left:0;right:auto}.admin-panel .writing-plus{opacity:.65}}.admin-article-publication{color:#6c8a7f;border-bottom:1px solid #eef1ef;justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px;padding-bottom:14px;font-size:12px;display:flex}.admin-article-publication>div{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.admin-article-publication button{font-size:12px}.admin-article-publication a{color:#4c7a69}@media (width<=800px){.admin-article-publication{flex-direction:column;align-items:flex-start}}.admin-panel{color:#283740;max-width:1440px;margin:0 auto;padding:24px}.admin-panel *{box-sizing:border-box}.admin-panel button,.admin-panel input,.admin-panel textarea,.admin-panel select{font:inherit}.admin-panel button{color:inherit;cursor:pointer;background:#fff;border:1px solid #dce2e6;border-radius:7px;padding:8px 12px}.admin-panel button:hover{background:#f2f6f5}.admin-panel button:disabled{opacity:.45;cursor:default}.admin-panel :focus-visible{outline-offset:2px;outline:2px solid #398575}.admin-panel [role=alert]{color:#a23939}.admin-toolbar,.admin-toolbar-actions,.admin-nav-heading,.admin-editor-heading,.admin-material-heading{justify-content:space-between;align-items:center;gap:16px;display:flex}.admin-brand,.admin-eyebrow{color:#78858c;letter-spacing:.04em;margin:0 0 5px;font-size:12px}.admin-toolbar h1{margin:0;font-size:24px;font-weight:650}.admin-toolbar-actions{font-size:13px}.admin-toolbar-actions a{color:#52666b;text-decoration:none}.admin-feedback{min-height:22px;margin:12px 0 8px;font-size:13px}.admin-workspace{border:0;min-width:0;margin:0;padding:0}.admin-layout{grid-template-columns:260px minmax(0,1fr);align-items:start;gap:24px;height:auto;min-height:360px;display:grid}.admin-theme-navigation{flex-direction:column;min-width:0;height:calc(100dvh - 32px);min-height:0;display:flex;position:sticky;top:16px}.admin-nav-heading{padding:6px 8px 16px}.admin-nav-heading h2,.admin-material-heading h3{margin:0;font-size:16px;font-weight:600}.admin-count{color:#758189;vertical-align:middle;background:#edf1f2;border-radius:20px;margin-left:6px;padding:2px 7px;font-size:11px;font-weight:500;display:inline-block}.admin-panel .admin-text-button{color:#55736e;background:0 0;border:0;padding:4px;font-size:12px}.admin-theme-list{overscroll-behavior:auto;scrollbar-gutter:stable;flex:1;min-height:0;margin:0;padding:2px 4px;list-style:none;overflow-y:auto}.admin-theme-list li{grid-template-columns:minmax(0,1fr);align-items:center;gap:2px;margin-bottom:4px;display:grid}.admin-theme-list .admin-theme-select{text-align:left;overflow-wrap:anywhere;background:0 0;border:0;border-radius:8px;width:100%;min-width:0;padding:12px}.admin-theme-select strong{font-size:14px;font-weight:500;display:block}.admin-theme-list .admin-theme-select[aria-pressed=true]{color:#235f52;background:#eaf2ef;box-shadow:inset 3px 0 #4a8a78}.admin-theme-status{color:#879198;margin-top:5px;font-size:11px;display:block}.admin-theme-status:before{content:"";vertical-align:2px;background:#b9c1c5;border-radius:50%;width:5px;height:5px;margin-right:5px;display:inline-block}.admin-theme-status.is-public:before{background:#5a9b7e}.admin-theme-list.is-ordering li{grid-template-columns:24px minmax(0,1fr) 24px 24px}.admin-panel .admin-drag,.admin-panel .admin-order-button{color:#78888c;background:0 0;border:0;padding:4px 2px}.admin-panel .admin-drag{cursor:grab;touch-action:none;-webkit-user-select:none;user-select:none;font-size:22px}.admin-panel .admin-drag:active{cursor:grabbing}.admin-sort-hint{color:#7c888d;margin:0 8px 10px;font-size:11px}.admin-new-theme{border-top:1px solid #e2e7e8;flex-shrink:0;max-height:55%;margin-top:12px;padding:12px 8px 0;overflow-y:auto}.admin-panel summary{cursor:pointer;color:#65777c;font-size:13px}.admin-panel label{color:#627178;font-size:13px;display:block}.admin-panel input:not([type=checkbox]),.admin-panel textarea,.admin-panel select{color:#283740;background:#fff;border:1px solid #dce2e6;border-radius:7px;width:100%;margin-top:7px;padding:10px;display:block}.admin-new-theme label,.admin-asset-details label{margin:12px 0}.admin-editor-pane{background:#fff;border:1px solid #e1e6e8;border-radius:12px;min-width:0;min-height:0;padding:24px;scroll-margin-top:16px;scroll-padding-top:24px;overflow:visible}.admin-editor-heading{z-index:3;background:#fff;border-bottom:1px solid #eef1f2;margin:-18px 0 20px;padding:18px 0;position:sticky;top:0}.admin-editor-heading>div{min-width:0}.admin-editor-heading h2{overflow-wrap:anywhere;margin:0;font-size:22px;font-weight:600}.admin-editor-heading h2:focus{outline:none}.admin-panel .admin-primary{color:#fff;background:#2c695b;border-color:#2c695b;flex-shrink:0;padding:10px 16px;font-size:13px}.admin-panel .admin-primary:hover{background:#225548}.admin-theme-form{grid-template-columns:1fr 1.2fr;align-items:start;gap:16px;display:grid}.admin-theme-form textarea{resize:vertical;height:72px;min-height:42px}.admin-theme-form .admin-check{align-items:center;gap:7px;display:flex}.admin-check input{accent-color:#2c695b;margin:0}.admin-material-heading{border-top:1px solid #eef1f2;margin-top:24px;padding:20px 0 14px}.admin-panel .admin-add-image{font-size:12px}.admin-registration{background:#f6f8f8;border-radius:8px;grid-template-columns:80px minmax(0,1fr);gap:16px;padding:16px;display:grid}.admin-registration>img{object-fit:contain;width:80px;height:100px}.admin-registration-controls{min-width:0}.admin-registration-controls>button{margin-top:10px;font-size:12px}.admin-panel .admin-upload-action{color:#397465;cursor:pointer;margin:12px 0 8px 12px;font-size:12px;display:inline-block}.admin-upload-action:focus-within{outline:2px solid #398575}.admin-hint{color:#879298;font-size:11px;line-height:1.6;display:block}.admin-item-grid,.admin-asset-grid{grid-template-columns:repeat(auto-fill,minmax(145px,1fr));gap:14px;margin:0 0 20px;display:grid}.admin-item-grid article{min-width:0;position:relative}.admin-item-grid article>img{object-fit:contain;background:#f7f9f9;border-radius:8px;width:100%;height:140px;display:block}.admin-image-caption{color:#8a969b;justify-content:space-between;align-items:center;min-height:26px;padding:4px 2px;font-size:11px;display:flex}.admin-panel .admin-remove{color:#748187;background:#fffffff0;border:1px solid #e7ebed;border-radius:50%;width:25px;height:25px;padding:0;font-size:18px;line-height:1;position:absolute;top:6px;right:6px}.admin-confirm{background:#fff;border:1px solid #e3e7e9;border-radius:8px;flex-wrap:wrap;gap:5px;padding:8px;display:inline-flex;box-shadow:0 3px 12px #263a4012}.admin-item-grid .admin-confirm{z-index:2;max-width:100%;position:absolute;top:6px;right:6px}.admin-confirm button{padding:6px;font-size:11px}.admin-panel .admin-danger-button{color:#a34343}.admin-empty{text-align:center;color:#8b979b;padding:32px 12px 42px}.admin-empty>span{color:#b7c2c4;font-size:30px}.admin-empty p{margin:10px 0 5px;font-size:14px}.admin-empty small{font-size:12px}.admin-danger-zone,.admin-library{border-top:1px solid #edf0f1;margin-top:16px;padding-top:16px}.admin-danger-zone summary{color:#9a7474;font-size:12px}.admin-danger-zone p{color:#7c878d;font-size:12px}.admin-danger-zone label{margin-bottom:12px}.admin-library{margin-top:24px}.admin-asset-grid{margin-top:16px}.admin-asset-grid button{overflow-wrap:anywhere;flex-direction:column;align-items:center;gap:8px;min-width:0;font-size:12px;display:flex}.admin-asset-grid img{object-fit:contain;width:100%;height:110px}.admin-asset-details{background:#f7f9f9;border-radius:8px;padding:16px}.admin-asset-details img{object-fit:contain;max-width:100%;height:150px}@media (width>=801px) and (width<=1050px){.admin-layout{grid-template-columns:230px minmax(0,1fr);gap:16px}.admin-theme-form{grid-template-columns:1fr}}@media (width<=800px){.admin-panel{padding:16px}.admin-toolbar{flex-wrap:wrap}.admin-toolbar h1{font-size:22px}.admin-toolbar-actions{justify-content:flex-start;width:100%}.admin-layout{grid-template-columns:1fr;gap:16px;height:auto;min-height:0}.admin-theme-navigation{height:280px;position:static}.admin-editor-pane{height:auto;min-height:360px;padding:18px}.admin-editor-heading{top:0}.admin-editor-heading h2{font-size:18px}.admin-theme-form{grid-template-columns:1fr}.admin-panel .admin-primary{padding:9px 12px}.admin-registration{grid-template-columns:1fr}.admin-registration>img{height:70px}.admin-panel .admin-upload-action{margin-left:0;display:block}}.admin-format-switch{gap:6px;margin-bottom:12px;display:flex}.admin-format-switch button{font-size:12px}.admin-format-switch button[aria-pressed=true]{color:#235f52;background:#eaf2ef;border-color:#7fa99c}.admin-pair-fields{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px;display:grid}.admin-pair-editor{background:#f6f8f8;border-radius:8px;margin-bottom:16px;padding:16px}.admin-pair-preview{color:#9ba6aa;justify-content:center;align-items:center;height:110px;margin-top:10px;font-size:12px;display:flex}.admin-pair-preview img{object-fit:contain;max-width:100%;height:100%}.admin-panel .admin-pair-editor .admin-upload-action{margin-left:0}.admin-pair-actions{flex-wrap:wrap;gap:8px;margin-top:12px;display:flex}.admin-pair-actions button{font-size:12px}.admin-pair-thumbnails{background:#f7f9f9;border-radius:8px;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:4px;height:140px;display:grid;overflow:hidden}.admin-pair-thumbnails img{object-fit:contain;width:100%;min-width:0;height:100%}.admin-pair-edit-section{border-top:1px solid #edf0f1;padding-top:12px}@media (width<=500px){.admin-pair-fields{gap:8px}.admin-pair-editor{padding:12px}}