:root{font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#191b23;background:#f5f6fa;font-synthesis:none;text-rendering:optimizeLegibility;--violet: #6c5ce7;--violet-dark: #5747ca;--ink: #191b23;--muted: #686b78;--line: #e4e5eb}*{box-sizing:border-box}html,body,#root{width:100%;min-height:100%;margin:0}button,input,select{font:inherit}button{-webkit-tap-highlight-color:transparent}.visually-hidden{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}.library-shell{min-height:100svh;padding:24px clamp(22px,4vw,68px) 72px;background:radial-gradient(circle at 88% 4%,rgba(108,92,231,.12),transparent 26%),linear-gradient(180deg,#fafafe,#f4f5f9)}.library-header{max-width:1440px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:0 0 24px;border-bottom:1px solid var(--line)}.library-brand{display:flex;align-items:center;gap:14px}.library-brand .brand-mark{width:46px;height:46px;border-radius:14px;font-size:21px;box-shadow:none}.library-brand p{margin:0 0 4px;color:var(--violet);font-size:10px;font-weight:850;letter-spacing:.13em}.library-brand strong{font-size:16px;letter-spacing:-.01em}.library-actions{display:flex;gap:10px}.library-user{align-self:center;padding:7px 10px;border-radius:10px;background:#f0eefc;color:var(--violet-dark);font-size:11px;font-weight:800}.library-actions .primary-button,.library-actions .secondary-button{height:44px}.secondary-button{height:44px;padding:0 17px;border:1px solid var(--line);border-radius:13px;background:#fffc;color:var(--ink);font-weight:800;cursor:pointer}.secondary-button:hover{border-color:#cbc8ea;background:#fff}.library-intro{max-width:1440px;margin:0 auto;display:flex;align-items:end;justify-content:space-between;gap:40px;padding:clamp(42px,7vw,88px) 0 38px}.library-intro .eyebrow{margin:0 0 12px}.library-intro h1{margin:0;font-size:clamp(36px,4.5vw,64px);line-height:1;letter-spacing:-.055em}.library-intro>div>p:last-child{max-width:670px;margin:18px 0 0;color:var(--muted);font-size:16px;line-height:1.55}.library-summary{display:grid;grid-template-columns:auto auto;align-items:baseline;column-gap:9px;row-gap:3px;flex:0 0 auto;min-width:220px;padding:20px 24px;border:1px solid rgba(25,27,35,.07);border-radius:20px;background:#ffffffb8;box-shadow:0 14px 38px #2427380f}.library-summary strong{font-size:25px;letter-spacing:-.04em}.library-summary span{color:#777a88;font-size:12px;font-weight:700}.library-summary i{grid-column:1 / -1;height:1px;margin:7px 0;background:var(--line)}.library-folders{max-width:1440px;margin:0 auto;display:grid;gap:28px}.folder-section-wrap,.library-folder{position:relative;border:1px solid rgba(25,27,35,.07);border-radius:25px;background:#ffffffc7;box-shadow:0 18px 55px #2a2d410e}.folder-section-wrap .library-folder{border:0;border-radius:25px 25px 0 0;box-shadow:none;background:transparent}.library-folder{padding:22px}.folder-heading{display:flex;align-items:center;gap:12px;margin-bottom:22px}.folder-icon{width:44px;height:44px;display:grid;place-items:center;border-radius:13px;background:#efedff;color:var(--violet);font-size:27px;font-weight:900;transform:rotate(-2deg)}.folder-heading h2{margin:0 0 3px;font-size:18px;letter-spacing:-.025em}.folder-heading p{margin:0;color:#858895;font-size:11px;font-weight:700}.lesson-group+.lesson-group{margin-top:25px}.lesson-group h3{margin:0 0 11px;color:#696c79;font-size:11px;font-weight:850;letter-spacing:.08em;text-transform:uppercase}.lesson-group-past{padding-top:19px;border-top:1px solid #ececf1}.board-card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(245px,1fr));gap:13px}.library-board-card{position:relative;min-width:0;display:grid;grid-template-columns:90px minmax(0,1fr);align-items:center;gap:13px;min-height:104px;padding:8px 12px 8px 8px;border:1px solid #e7e7ed;border-radius:17px;background:#fff;color:var(--ink);text-decoration:none;transition:transform .16s,border-color .16s,box-shadow .16s}.library-board-card:hover{transform:translateY(-2px);border-color:#cbc7f0;box-shadow:0 12px 28px #26293b17}.board-card-preview{position:relative;align-self:stretch;min-height:86px;overflow:hidden;border-radius:11px;background-color:#f9f9fc;background-image:linear-gradient(#e8e9ef 1px,transparent 1px),linear-gradient(90deg,#e8e9ef 1px,transparent 1px);background-size:18px 18px}.preview-equation{position:absolute;left:12px;top:17px;font-family:Georgia,serif;font-size:13px;font-style:italic}.preview-stroke{position:absolute;display:block;height:2px;border-radius:3px;background:var(--violet);transform-origin:left center}.preview-stroke-a{width:50px;left:18px;top:50px;transform:rotate(-18deg)}.preview-stroke-b{width:38px;left:40px;top:60px;transform:rotate(28deg);background:#e85d75}.board-card-copy{display:grid;gap:7px;min-width:0;padding:0 0 20px}.board-card-copy strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px}.board-card-copy span{color:#858895;font-size:10px;font-weight:650}.lesson-status{position:absolute;right:12px;bottom:11px;padding:4px 7px;border-radius:99px;font-size:9px;font-weight:800}.lesson-status.current{background:#e8f8f2;color:#13855e}.lesson-status.past{background:#f0f1f4;color:#777a87}.folder-empty{margin:4px 0 8px;color:#9295a2;font-size:13px}.folder-add-board{width:100%;height:47px;border:0;border-top:1px solid #ececf1;border-radius:0 0 25px 25px;background:#f9f9fcc7;color:var(--violet-dark);font-size:12px;font-weight:800;cursor:pointer}.folder-add-board:hover{background:#f1efff}.library-loading,.library-error,.library-empty-state{max-width:1440px;margin:0 auto}.library-loading{padding:70px 0;color:#777a87;text-align:center}.auth-required{min-height:100svh;display:grid;place-content:center;justify-items:center;gap:14px;padding:28px;background:#f7f8fb;text-align:center}.auth-required h1{margin:4px 0 0;font-size:clamp(28px,6vw,46px)}.auth-required p{max-width:480px;margin:0 0 8px;color:#747786;line-height:1.55}.auth-required .primary-button{display:inline-flex;align-items:center;text-decoration:none}.board-login-card{display:grid;width:min(430px,calc(100vw - 32px));gap:18px;padding:clamp(24px,5vw,38px);border:1px solid rgba(72,75,95,.12);border-radius:28px;background:#fffffff5;box-shadow:0 28px 90px #1c1f2d29;text-align:left}.board-login-card .brand-mark{justify-self:start}.board-login-card h1{margin:2px 0 6px}.board-login-card p{margin:0}.board-login-card label{display:grid;gap:8px;color:#555866;font-size:12px;font-weight:800}.board-login-card input{width:100%;height:52px;border:1px solid var(--line);border-radius:15px;padding:0 15px;outline:none;background:#f9f9fc;color:var(--ink);font:inherit}.board-login-card input:focus{border-color:var(--violet);box-shadow:0 0 0 4px #6c5ce71c}.board-login-card .primary-button{width:100%;justify-content:center}.board-login-card .form-error{margin:-4px 0 0;color:#b72d45;font-size:12px}.library-error{margin-bottom:20px;padding:13px 16px;border-radius:13px;background:#fff0f3;color:#b72d45;font-size:13px}.library-empty-state{display:grid;justify-items:center;padding:65px 25px;border:1px dashed #d5d4df;border-radius:26px;background:#fff9;text-align:center}.library-empty-state>div{display:grid;place-items:center;width:64px;height:64px;border-radius:20px;background:#efedff;color:var(--violet);font-size:29px}.library-empty-state h2{margin:20px 0 8px;font-size:23px}.library-empty-state p{margin:0 0 22px;color:var(--muted);font-size:14px}.dialog-backdrop{position:fixed;z-index:60;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;padding:20px;background:#18192073;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.library-dialog{position:relative;width:min(560px,100%);padding:30px;border-radius:25px;background:#fff;box-shadow:0 35px 100px #14162047}.library-dialog .eyebrow{margin:0 0 8px}.library-dialog h2{margin:0 0 25px;font-size:29px;letter-spacing:-.04em}.dialog-close{position:absolute;top:16px;right:16px;width:36px;height:36px;border:0;border-radius:11px;background:#f1f2f5;color:#696c79;font-size:24px;cursor:pointer}.library-dialog form{display:grid;gap:17px}.library-dialog label{display:grid;gap:8px;color:#5d606d;font-size:12px;font-weight:800}.library-dialog input,.library-dialog select{width:100%;height:50px;border:1px solid var(--line);border-radius:14px;padding:0 14px;outline:none;background:#fbfbfd;color:var(--ink)}.library-dialog input:focus,.library-dialog select:focus{border-color:var(--violet);box-shadow:0 0 0 4px #6c5ce71a}.library-dialog .primary-button{width:100%;margin-top:3px}.dialog-form-row{display:grid;grid-template-columns:1fr 1.15fr;gap:12px}.home-shell{min-height:100svh;display:grid;grid-template-columns:minmax(400px,.92fr) minmax(520px,1.08fr);gap:clamp(24px,5vw,84px);align-items:center;padding:clamp(28px,6vw,96px);overflow:hidden;background:radial-gradient(circle at 12% 14%,rgba(108,92,231,.14),transparent 29%),linear-gradient(145deg,#f9f9fc,#f3f4f9)}.home-card{max-width:620px;position:relative;z-index:2}.brand-mark,.compact-brand{display:grid;place-items:center;width:54px;height:54px;border-radius:17px;background:var(--ink);color:#fff;font-weight:850;font-size:25px;text-decoration:none;box-shadow:0 12px 30px #191b2329}.eyebrow{margin:30px 0 14px;color:var(--violet);font-size:13px;font-weight:800;letter-spacing:.16em}.home-card h1{margin:0;max-width:590px;font-size:clamp(42px,5.1vw,76px);line-height:.98;letter-spacing:-.055em}.home-lead{margin:24px 0 30px;max-width:570px;color:var(--muted);font-size:18px;line-height:1.55}.teacher-only-note{margin:-12px 0 22px;max-width:570px;padding:12px 15px;border-radius:13px;background:#efedff;color:#5f54b8;font-size:13px;font-weight:700;line-height:1.45}.create-room-form{display:grid;grid-template-columns:1fr 1.2fr 1fr;align-items:end;gap:12px}.create-room-form label{display:grid;gap:8px;color:#555865;font-size:12px;font-weight:750}.create-room-form input{width:100%;height:52px;border:1px solid var(--line);border-radius:15px;padding:0 16px;background:#ffffffd6;outline:none;color:var(--ink);transition:border-color .15s,box-shadow .15s}.create-room-form input:focus{border-color:var(--violet);box-shadow:0 0 0 4px #6c5ce71a}.primary-button,.share-button{border:0;border-radius:15px;height:52px;padding:0 21px;color:#fff;background:var(--violet);font-weight:800;cursor:pointer;box-shadow:0 10px 24px #6c5ce740}.create-room-form .primary-button{grid-column:1 / -1}.primary-button:hover,.share-button:hover{background:var(--violet-dark)}.primary-button:disabled{opacity:.62;cursor:wait}.form-error{grid-column:1 / -1;margin:0;color:#b72d45;font-size:13px}.feature-row{display:flex;flex-wrap:wrap;gap:9px;margin-top:22px}.feature-row span{border:1px solid var(--line);border-radius:99px;padding:8px 12px;background:#ffffff9e;color:#5f6270;font-size:12px;font-weight:700}.home-preview{position:relative;height:min(74vh,720px);min-height:520px;border-radius:34px;background-color:#fff;overflow:hidden;transform:rotate(1.1deg);border:1px solid rgba(25,27,35,.06);box-shadow:0 45px 100px #272b4029;background-image:linear-gradient(#eef0f5 1px,transparent 1px),linear-gradient(90deg,#eef0f5 1px,transparent 1px);background-size:36px 36px}.preview-toolbar{position:absolute;left:22px;top:22px;display:grid;gap:10px;padding:10px;border-radius:16px;background:#fff;box-shadow:0 10px 35px #282c4226}.preview-toolbar i{width:30px;height:30px;border-radius:9px;background:#f1f2f6}.preview-toolbar i:nth-child(1){background:var(--violet)}.formula{position:absolute;font-family:Times New Roman,serif;font-size:clamp(29px,3vw,46px);font-style:italic}.formula-one{top:26%;left:27%;transform:rotate(-1deg)}.formula-two{top:42%;left:37%;color:var(--violet);transform:rotate(.5deg)}.formula-two:after{content:"";position:absolute;height:4px;left:-6px;right:-9px;bottom:-10px;border-radius:4px;background:#e85d75;transform:rotate(-2deg)}.sketch-axis{position:absolute;left:23%;right:19%;top:64%;height:2px;background:#4d5060}.sketch-axis i{position:absolute;left:48%;top:-80px;width:2px;height:160px;background:#4d5060}.sketch-axis b{position:absolute;left:28%;top:-54px;width:42%;height:96px;border:4px solid #1677ff;border-color:#1677ff transparent transparent #1677ff;border-radius:50%;transform:rotate(43deg)}.preview-cursor{position:absolute;padding:5px 8px;border-radius:7px 7px 7px 0;color:#fff;font-size:11px;font-weight:750}.preview-cursor:before{content:"";position:absolute;left:-8px;bottom:-8px;border:6px solid transparent;border-top-color:inherit;transform:rotate(45deg)}.cursor-a{left:59%;top:55%;background:#e85d75}.cursor-b{left:45%;top:34%;background:var(--violet)}.board-app{position:fixed;top:0;right:0;bottom:0;left:0;overflow:hidden;background:#f7f8fb}.board-header{position:absolute;z-index:20;top:14px;left:14px;right:14px;height:62px;display:flex;align-items:center;gap:13px;padding:8px 10px;border:1px solid rgba(25,27,35,.08);border-radius:20px;background:#ffffffe3;box-shadow:0 12px 32px #22253317;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.compact-brand{width:44px;height:44px;border-radius:13px;font-size:20px;box-shadow:none;flex:0 0 auto}.board-title-block{display:grid;gap:3px;min-width:0}.board-title-block strong{font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.board-title-block span{display:flex;align-items:center;gap:6px;color:#757886;font-size:11px}.board-title-block span:before{content:"";width:7px;height:7px;border-radius:50%;background:#19a974}.board-title-block .connection-offline:before{background:#e09b23}.participant-stack{display:flex;margin-left:auto;padding-left:12px}.participant-stack span{display:grid;place-items:center;width:34px;height:34px;margin-left:-8px;border:3px solid white;border-radius:50%;color:#fff;font-size:12px;font-weight:800}.share-button{height:40px;min-width:108px;padding:0 16px;border-radius:12px;font-size:12px;box-shadow:none}.drawing-access{display:flex;align-items:center;gap:7px;height:40px;padding:0 12px;border:0;border-radius:12px;font-size:11px;font-weight:800;cursor:pointer}.drawing-access.enabled{color:#087a55;background:#e6f8f1}.drawing-access.locked{color:#a22c43;background:#fff0f3}.video-toggle{display:flex;align-items:center;justify-content:center;gap:7px;height:40px;padding:0 12px;border:0;border-radius:12px;background:#f1f2f6;color:#565966;font-size:11px;font-weight:800;cursor:pointer}.video-toggle:hover,.video-toggle.active{color:var(--violet-dark);background:#ece9ff}.view-only-banner{position:absolute;z-index:23;top:90px;left:50%;display:flex;align-items:center;gap:7px;transform:translate(-50%);padding:9px 13px;border-radius:12px;background:#191b23;color:#fff;font-size:11px;font-weight:800;box-shadow:0 10px 26px #191b2333}.canvas-shell{position:absolute;top:0;right:0;bottom:0;left:0}.board-loading{display:grid;place-items:center;width:100%;height:100%;color:#747786}.board-canvas-container{position:relative;width:100%;height:100%;overflow:hidden}.board-canvas{display:block;width:100%;height:100%;touch-action:none;-webkit-user-select:none;user-select:none}.board-canvas.tool-hand{cursor:grab}.board-canvas.tool-select{cursor:default}.board-canvas.tool-text{cursor:text}.board-canvas.tool-eraser{cursor:cell}.board-canvas.tool-pencil,.board-canvas.tool-brush,.board-canvas.tool-highlighter,.board-canvas.tool-line,.board-canvas.tool-dashedLine,.board-canvas.tool-wavyLine,.board-canvas.tool-arrow,.board-canvas.tool-doubleArrow,.board-canvas.tool-rectangle,.board-canvas.tool-ellipse,.board-canvas.tool-triangle,.board-canvas.tool-rightTriangle,.board-canvas.tool-diamond,.board-canvas.tool-hexagon,.board-canvas.tool-octagon,.board-canvas.tool-cube,.board-canvas.tool-rectangularPrism,.board-canvas.tool-cylinder,.board-canvas.tool-cone,.board-canvas.tool-pyramid,.board-canvas.tool-sphere,.board-canvas.tool-triangularPrism,.board-canvas.tool-trapezoidalPrism,.board-canvas.tool-hexagonalPrism,.board-canvas.tool-coneFrustum,.board-canvas.tool-triangularPyramid,.board-canvas.tool-rectangularPyramid,.board-canvas.tool-trapezoidalPyramid,.board-canvas.tool-hexagonalPyramid,.board-canvas.tool-squareFrustum,.board-canvas.tool-hexagonalFrustum,.board-canvas.tool-axes2d,.board-canvas.tool-axes3d{cursor:crosshair}.board-canvas.view-only{cursor:grab}.tool-dock{position:absolute;z-index:21;left:16px;top:92px;display:grid;gap:5px;padding:7px;border:1px solid rgba(25,27,35,.08);border-radius:18px;background:#ffffffeb;box-shadow:0 14px 38px #2225331a;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.tool-button{width:48px;height:46px;display:grid;place-items:center;border:0;border-radius:12px;background:transparent;color:#5f6270;cursor:pointer}.tool-button span{font-size:22px;line-height:1}.tool-button svg{width:23px;height:23px}.tool-button small{display:none}.tool-button:hover{background:#f2f2f7;color:var(--ink)}.tool-button.active{background:var(--ink);color:#fff}.tool-button:disabled,.tool-popover-grid button:disabled{opacity:.38;cursor:default}.tool-popover{position:absolute;z-index:24;left:82px;width:min(620px,calc(100vw - 102px));padding:12px;border:1px solid rgba(25,27,35,.08);border-radius:18px;background:#fffffff5;box-shadow:0 18px 52px #1e22312e;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.tool-popover-lines{top:328px}.tool-popover-shapes2d{top:378px}.tool-popover-shapes3d{top:428px}.tool-popover-shapes3d{width:min(760px,calc(100vw - 102px));max-height:min(520px,calc(100vh - 450px));overflow-y:auto}.tool-popover strong{display:block;margin:0 4px 10px;font-size:12px;color:#666977}.tool-popover-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(108px,1fr));gap:7px}.tool-popover-grid button{min-height:66px;display:grid;place-items:center;gap:4px;border:0;border-radius:12px;background:#f4f5f8;color:#555865;cursor:pointer}.tool-popover-grid button:hover,.tool-popover-grid button.selected{background:#ece9ff;color:var(--violet-dark)}.tool-popover-grid svg{width:29px;height:29px}.tool-popover-grid small{max-width:100%;font-size:10px;font-weight:750;line-height:1.15;text-align:center;overflow-wrap:anywhere}.tool-popover-shapes2d .tool-popover-grid,.tool-popover-shapes3d .tool-popover-grid{grid-template-columns:repeat(auto-fit,minmax(112px,1fr))}.tool-popover-shapes2d .tool-popover-grid button,.tool-popover-shapes3d .tool-popover-grid button{min-height:94px;padding:4px}.shape-thumbnail{display:block;width:112px;height:82px;max-width:100%}.board-controls{position:absolute;z-index:21;left:50%;bottom:max(16px,env(safe-area-inset-bottom));transform:translate(-50%);display:flex;align-items:center;gap:8px;max-width:calc(100vw - 28px);padding:8px;border:1px solid rgba(25,27,35,.08);border-radius:18px;background:#ffffffeb;box-shadow:0 14px 40px #2225331f;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.board-controls>button{height:39px;min-width:39px;border:0;border-radius:11px;padding:0 11px;background:#f2f3f7;color:#4e5160;font-size:12px;font-weight:750;cursor:pointer}.board-controls>button:hover{background:#e8e9ef;color:var(--ink)}.board-controls>button:disabled,.color-dot:disabled{opacity:.38;cursor:default}.board-controls .clear-board{color:#bd334d;background:#fff0f3}.color-palette{display:flex;gap:5px;padding:0 6px}.color-dot{width:24px;height:24px;border:3px solid white;border-radius:50%;padding:0;cursor:pointer;box-shadow:0 0 0 1px #d8d9df}.color-dot.selected{box-shadow:0 0 0 2px var(--violet);transform:scale(.88)}.width-control{display:flex;align-items:center;gap:7px;padding:0 7px;color:#737684;font-size:10px;font-weight:750}.width-control input{width:82px;accent-color:var(--violet)}.remote-cursors{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;overflow:hidden}.remote-cursor{position:absolute;transform:translate(4px,4px);transition:left 45ms linear,top 45ms linear}.remote-cursor i{display:block;width:14px;height:18px;background:currentColor;clip-path:polygon(0 0,100% 68%,54% 72%,35% 100%)}.remote-cursor span{display:inline-block;margin:-2px 0 0 10px;padding:4px 7px;border-radius:0 7px 7px;color:#fff;font-size:10px;font-weight:750;white-space:nowrap}.zoom-indicator{position:absolute;right:18px;bottom:18px;padding:7px 10px;border:1px solid var(--line);border-radius:10px;background:#ffffffd6;color:#6d707d;font-size:11px;font-weight:750;pointer-events:none}.image-drop-overlay{position:absolute;z-index:30;top:88px;right:22px;bottom:92px;left:86px;display:grid;place-items:center;border:3px dashed var(--violet);border-radius:28px;background:#efedffd1;color:var(--violet-dark);font-size:clamp(18px,3vw,30px);font-weight:850;pointer-events:none;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.drag-active .board-canvas{filter:saturate(.72)}.page-strip{position:absolute;z-index:22;top:92px;right:18px;display:flex;align-items:center;gap:5px;max-width:calc(100vw - 110px);padding:6px;border:1px solid rgba(25,27,35,.08);border-radius:15px;background:#ffffffeb;box-shadow:0 11px 30px #2225331a;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.page-strip button{flex:0 0 auto;height:34px;padding:0 12px;border:0;border-radius:10px;background:transparent;color:#6e7180;font-size:11px;font-weight:800;cursor:pointer}.page-strip button:hover{background:#f1f2f6;color:var(--ink)}.page-strip .page-step,.page-strip .add-page{display:grid;width:34px;padding:0;place-items:center}.page-strip .page-step{background:#f1f2f6}.page-strip .page-step:disabled{opacity:.35;cursor:default}.page-status{min-width:82px;padding:0 5px;color:#555865;font-size:11px;font-weight:800;text-align:center;white-space:nowrap}.page-strip .add-page{background:#efedff;color:var(--violet-dark)}.page-strip .add-page:disabled{opacity:.4;cursor:default}.page-actions{position:relative;flex:0 0 auto}.page-strip .page-menu-toggle{display:grid;width:34px;padding:0;place-items:center;background:#f1f2f6}.page-menu{position:absolute;z-index:60;top:calc(100% + 10px);right:0;width:max-content;max-width:min(290px,calc(100vw - 32px));padding:6px;border:1px solid rgba(25,27,35,.09);border-radius:13px;background:#fffffffa;box-shadow:0 16px 42px #191b232e;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.page-strip .page-menu .delete-page{display:flex;align-items:center;gap:8px;width:100%;height:38px;color:#bd334d;background:#fff0f3}.page-strip .page-menu .delete-page:hover{color:#9e213a;background:#ffe2e8}.page-strip .page-menu .delete-page:disabled{color:#9699a5;background:#f2f3f6;cursor:default}.video-open .page-strip,.video-open .zoom-indicator{right:318px}.video-panel{position:absolute;z-index:26;top:92px;right:14px;display:none;width:286px;max-height:calc(100svh - 112px);padding:9px;overflow-y:auto;border:1px solid rgba(25,27,35,.09);border-radius:20px;background:#fffffff0;box-shadow:0 18px 54px #1c1f2d29;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.video-panel.open{display:grid;gap:9px}.video-panel-header{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:2px 2px 3px 5px}.video-panel-header>div{display:flex;align-items:center;gap:8px;min-width:0;color:#656876}.video-panel-header>div>span{display:grid;gap:1px;min-width:0}.video-panel-header strong{color:var(--ink);font-size:12px}.video-panel-header small{color:#7a7d8a;font-size:9px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.video-panel-header button{display:grid;width:32px;height:32px;place-items:center;flex:0 0 auto;border:0;border-radius:10px;background:#f1f2f6;color:#686b78;cursor:pointer}.video-panel-header button:hover{color:var(--ink);background:#e8e9ef}.device-mode-switch{display:grid;grid-template-columns:1fr 1fr;gap:5px;padding:4px;border-radius:12px;background:#f0f1f5}.device-mode-switch button{min-height:31px;border:0;border-radius:9px;background:transparent;color:#747786;font-size:9px;font-weight:800;cursor:pointer}.device-mode-switch button.active{background:#fff;color:var(--violet-dark);box-shadow:0 3px 12px #1f22311a}.device-mode-note{padding:9px 10px;border-radius:11px;background:#efedff;color:#51479f;font-size:9px;font-weight:700;line-height:1.4}.video-tile{position:relative;aspect-ratio:16 / 10;overflow:hidden;border-radius:15px;background:#20222b;color:#fff}.video-tile video{display:block;width:100%;height:100%;object-fit:cover;transform:scaleX(-1);background:#20222b}.video-tile.remote-tile video{transform:none}.video-tile video.video-hidden{opacity:0}.video-placeholder{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-content:center;justify-items:center;gap:8px;background:radial-gradient(circle at 50% 25%,#444858,#20222b 70%);color:#d9dbe4}.video-placeholder b{display:grid;width:54px;height:54px;place-items:center;border:2px solid rgba(255,255,255,.32);border-radius:50%;background:#6c5ce7;color:#fff;font-size:20px}.video-placeholder span{font-size:10px;font-weight:750}.video-tile-label{position:absolute;z-index:2;top:8px;left:8px;display:flex;align-items:center;gap:6px;max-width:calc(100% - 16px);padding:5px 7px;border-radius:8px;background:#14151ba6;font-size:10px;font-weight:800;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.video-tile-label span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.video-tile-label small{color:#c7c9d2;font-size:8px}.video-controls{position:absolute;z-index:3;left:50%;bottom:9px;display:flex;gap:7px;transform:translate(-50%)}.video-controls button,.moderation-controls button{display:grid;width:36px;height:36px;place-items:center;border:0;border-radius:11px;color:#fff;cursor:pointer;box-shadow:0 6px 18px #0003}.video-controls button.active{background:#2c2f3bd6}.video-controls button.muted,.moderation-controls button.blocked{background:#d9435e}.video-controls button:disabled{opacity:.48;cursor:default}.moderation-controls{position:absolute;z-index:3;left:8px;right:8px;bottom:8px;display:flex;align-items:center;justify-content:space-between;gap:7px;padding:6px 7px 6px 9px;border-radius:11px;background:#14151bb8;-webkit-backdrop-filter:blur(9px);backdrop-filter:blur(9px)}.moderation-controls>span{display:flex;align-items:center;gap:5px;color:#e2e3e9;font-size:8px;font-weight:800}.moderation-controls>div{display:flex;gap:5px}.moderation-controls button{width:31px;height:31px;border-radius:9px;box-shadow:none}.moderation-controls button.allowed{background:#168a65}.media-restriction,.video-error{display:flex;align-items:center;gap:7px;padding:9px 10px;border-radius:11px;font-size:9px;font-weight:750;line-height:1.35}.media-restriction{color:#87611a;background:#fff6dc}.video-error{color:#a22c43;background:#fff0f3}.canvas-text-editor{position:absolute;z-index:45;width:min(310px,calc(100vw - 32px));padding:8px;border:1px solid rgba(108,92,231,.35);border-radius:15px;background:#fffffffa;box-shadow:0 18px 50px #191b2333;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.canvas-text-editor textarea{display:block;width:100%;height:86px;resize:vertical;border:0;border-radius:10px;padding:10px 11px;outline:none;background:#f6f6fa;color:var(--ink);font:500 15px/1.4 Inter,sans-serif}.canvas-text-editor>div{display:flex;justify-content:flex-end;gap:7px;margin-top:7px}.canvas-text-editor button{height:33px;padding:0 12px;border:0;border-radius:9px;background:#eeeff3;color:#656875;font-size:11px;font-weight:800;cursor:pointer}.canvas-text-editor button[type=submit]{background:var(--violet);color:#fff}.canvas-text-editor button:disabled{opacity:.45;cursor:default}.export-backdrop{position:fixed;z-index:70;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;padding:18px;background:#1819207a;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.export-dialog{position:relative;width:min(500px,100%);padding:28px;border-radius:24px;background:#fff;box-shadow:0 35px 100px #1416204d}.export-dialog .eyebrow{margin:0 0 7px}.export-dialog h2{margin:0 0 22px;font-size:28px;letter-spacing:-.04em}.export-format{display:grid;grid-template-columns:1fr 1fr;gap:6px;padding:5px;border-radius:14px;background:#f1f2f6}.export-format button{height:41px;border:0;border-radius:10px;background:transparent;color:#707381;font-weight:850;cursor:pointer}.export-format button.active{background:#fff;color:var(--violet-dark);box-shadow:0 3px 12px #282b3c1a}.export-scope{display:grid;gap:12px;margin:20px 0 0;padding:0;border:0}.export-scope legend{margin-bottom:11px;color:#555866;font-size:12px;font-weight:850}.export-scope>label{display:flex;align-items:center;gap:9px;color:#4d505d;font-size:13px;font-weight:700}.export-scope input[type=radio]{width:17px;height:17px;margin:0;accent-color:var(--violet)}.export-range{display:flex;gap:9px;padding-left:26px}.export-range label{display:flex;align-items:center;gap:6px;color:#777a87;font-size:12px;font-weight:700}.export-range input{width:70px;height:38px;border:1px solid var(--line);border-radius:10px;padding:0 8px;outline:none}.export-range input:focus{border-color:var(--violet);box-shadow:0 0 0 3px #6c5ce71a}.export-hint{margin:19px 0 0;padding:12px 14px;border-radius:12px;background:#f6f5ff;color:#665cae;font-size:11px;font-weight:650;line-height:1.45}.export-dialog .form-error{margin:12px 0 0}.export-actions{display:grid;grid-template-columns:1fr 1.35fr;gap:9px;margin-top:20px}.export-actions>button{height:46px;border:0;border-radius:13px;background:#eff0f4;color:#5f6270;font-weight:800;cursor:pointer}.export-actions .primary-button{height:46px;color:#fff;background:var(--violet)}.export-actions button:disabled,.export-dialog .dialog-close:disabled{opacity:.55;cursor:wait}@media(max-width:1050px){.home-shell{grid-template-columns:1fr .8fr;padding:44px}.create-room-form{grid-template-columns:1fr 1fr}.create-room-form .primary-button{grid-column:1 / -1}.home-preview{min-height:480px}.video-toggle span{display:none}.video-toggle{width:40px;padding:0}}@media(max-width:760px){.library-shell{padding:16px 14px 44px}.library-header{align-items:flex-start}.library-brand>div:last-child{display:none}.library-actions{width:100%;justify-content:flex-end}.library-actions button{padding:0 12px;font-size:11px}.library-intro{display:block;padding:42px 4px 28px}.library-intro h1{font-size:40px}.library-intro>div>p:last-child{font-size:14px}.library-summary{width:100%;margin-top:24px}.library-folder{padding:16px}.board-card-grid,.dialog-form-row{grid-template-columns:1fr}.library-dialog{max-height:calc(100svh - 24px);overflow-y:auto;padding:25px 20px;border-radius:21px}.home-shell{display:block;padding:28px 20px 44px;overflow:auto}.home-card{margin:0 auto}.home-card h1{font-size:clamp(40px,14vw,62px)}.home-lead{font-size:16px}.create-room-form{grid-template-columns:1fr}.create-room-form .primary-button{grid-column:auto}.home-preview{display:none}.board-header{top:max(8px,env(safe-area-inset-top));left:8px;right:8px;height:56px;border-radius:17px}.compact-brand{width:40px;height:40px}.board-title-block span{display:none}.participant-stack{padding-left:0}.participant-stack span{width:31px;height:31px}.drawing-access{width:40px;padding:0;justify-content:center;font-size:0}.share-button{min-width:74px;padding:0 11px}.tool-dock{top:auto;left:8px;right:8px;bottom:calc(76px + env(safe-area-inset-bottom));display:flex;overflow-x:auto;padding:6px;border-radius:16px}.tool-button{min-width:54px;height:50px}.tool-button span{font-size:20px}.tool-button small{display:block;font-size:8px;font-weight:700}.tool-popover{left:8px;right:8px;top:auto;bottom:calc(142px + env(safe-area-inset-bottom));width:auto}.tool-popover-shapes3d{max-height:min(52svh,420px)}.tool-popover-grid{display:flex;overflow-x:auto}.tool-popover-grid button{min-width:72px}.board-controls{left:8px;right:8px;bottom:max(8px,env(safe-area-inset-bottom));transform:none;justify-content:center;overflow-x:auto}.width-control,.board-controls .clear-board{display:none}.color-palette{flex:0 0 auto}.color-dot{width:22px;height:22px}.zoom-indicator{right:10px;bottom:143px}.image-drop-overlay{top:72px;right:10px;bottom:142px;left:10px}.page-strip{top:calc(72px + env(safe-area-inset-top));left:auto;right:8px;max-width:calc(100vw - 16px)}.video-open .page-strip,.video-open .zoom-indicator{right:8px}.video-panel{top:calc(118px + env(safe-area-inset-top));right:8px;width:min(250px,calc(100vw - 16px));max-height:calc(100svh - 270px)}.canvas-text-editor{position:fixed;left:16px!important;right:16px;top:max(90px,env(safe-area-inset-top))!important;width:auto}.export-dialog{max-height:calc(100svh - 24px);overflow-y:auto;padding:24px 19px;border-radius:20px}}@media(max-width:460px){.library-actions .secondary-button span,.library-actions .primary-button span{display:none}.library-actions{gap:6px}.library-intro h1{font-size:36px}.board-title-block{max-width:31vw}.participant-stack span:nth-child(n+3){display:none}.board-controls>button:nth-of-type(3){display:none}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}