.tool-page{color:#102a54;background:#f7f6f2;min-height:100vh}.tool-page-header{background:#fff;border-bottom:1px solid #e5e3dd;align-items:center;gap:18px;height:78px;padding:0 clamp(18px,4vw,52px);display:flex}.tool-page-header a{color:#102a54;font-weight:750;text-decoration:none}.tool-page-header .back-link{color:#546176;align-items:center;gap:8px;font-size:14px;display:inline-flex}.tool-page-header .tool-brand{margin-left:auto;font-size:20px;font-weight:850}.tool-main{width:min(1180px,100% - 36px);margin:0 auto;padding:46px 0 72px}.tool-heading{gap:12px;margin-bottom:30px;display:grid}.tool-heading .kicker{color:#2f80d9;letter-spacing:1.4px;text-transform:uppercase;margin:0;font-size:12px;font-weight:850}.tool-heading h1{letter-spacing:-2px;margin:0;font-size:clamp(34px,5vw,54px);line-height:1.04}.tool-heading>p:last-child{color:#667085;max-width:720px;margin:0;font-size:17px;line-height:1.6}.tool-panel{background:#fff;border:1px solid #e5e3dd;border-radius:20px;box-shadow:0 12px 36px #202c3a12}.control-panel{flex-wrap:wrap;align-items:end;gap:14px;margin-bottom:20px;padding:22px;display:flex}.field{gap:7px;min-width:150px;display:grid}.field.grow{flex:240px}.field label,.field-label{color:#344054;font-size:13px;font-weight:750}.field input,.field select{color:#102a54;background:#fff;border:1px solid #cbc9c2;border-radius:11px;outline:none;height:46px;padding:0 13px}.field input:focus,.field select:focus{border-color:#2f80d9;box-shadow:0 0 0 3px #2f80d91f}.primary-button,.secondary-button,.danger-button{cursor:pointer;border:0;border-radius:11px;height:46px;padding:0 18px;font-weight:750}.primary-button{color:#fff;background:#102a54}.secondary-button{color:#102a54;background:#edf2f7}.danger-button{color:#a83928;background:#fff0ed}.primary-button:hover{background:#173a70}.secondary-button:hover{background:#e2e9f0}.tool-help{color:#667085;font-size:13px;line-height:1.5}.decimal-stage{-webkit-user-select:none;user-select:none;touch-action:none;grid-template-rows:1fr auto;place-items:center;gap:22px;min-height:390px;padding:38px 24px 30px;display:grid;position:relative;overflow:hidden;container-type:inline-size}.decimal-stage:before{content:"";pointer-events:none;background:linear-gradient(90deg,#0000 49.75%,#f26f5224 49.75% 50.25%,#0000 50.25%);border-radius:16px;position:absolute;inset:26px}.decimal-dragger{z-index:1;cursor:grab;perspective:900px;background:linear-gradient(#edf2f7c7,#ffffff1f 24% 76%,#edf2f7c7),repeating-linear-gradient(0deg,#0000 0 32px,#102a5406 32px 33px);border-radius:24px;outline:none;align-content:center;gap:28px;width:min(100%,1040px);min-height:245px;padding:32px 18px;display:grid;position:relative;box-shadow:inset 0 16px 28px #102a5409,inset 0 -16px 28px #102a5409}.decimal-dragger:active,.decimal-dragger.is-dragging,.decimal-dragger.is-gliding{cursor:grabbing;box-shadow:inset 0 22px 34px #102a540f,inset 0 -22px 34px #102a540f}.decimal-number{width:100%;height:1.12em;font-size:clamp(44px,calc(88cqw / var(--digit-count)),126px);font-variant-numeric:tabular-nums;letter-spacing:.03em;transform-style:preserve-3d;font-weight:800;line-height:1;position:relative}.decimal-whole{white-space:nowrap;text-align:right;position:absolute;top:0;right:calc(50% + .28em)}.decimal-comma{z-index:4;color:#f26f52;isolation:isolate;pointer-events:none;text-shadow:-.08em 0 #fff,.08em 0 #fff,0 -.04em #fff,0 .04em #fff;position:absolute;top:0;left:50%;transform:translate(-50%)}.decimal-fraction{white-space:nowrap;align-items:baseline;display:flex;position:absolute;top:0;left:calc(50% + .3em)}.decimal-hidden{color:#cdd5df}.decimal-instruction{text-align:center;color:#526174;margin:0;font-weight:650}.is-dragging .decimal-number{filter:drop-shadow(0 5px 4px #102a5414);transform:rotateX(-2deg)scale(.995)}.decimal-scale{z-index:2;grid-template-columns:repeat(3,auto) minmax(120px,420px) repeat(3,auto);justify-content:center;align-items:center;gap:10px;width:100%;display:grid;position:relative}.drag-track{background:repeating-linear-gradient(90deg,#d6dde7 0 2px,#0000 2px 10%);border-radius:999px;width:min(420px,55vw);height:8px;position:relative}.drag-track:after{content:"";background:#f26f52;border-radius:2px;width:3px;height:18px;position:absolute;top:-5px;left:50%}.drag-track span{background:#2f80d9;border:4px solid #fff;border-radius:50%;width:17px;height:17px;transition:left .2s;position:absolute;top:50%;transform:translate(-50%,-50%);box-shadow:0 2px 7px #102a5440}.decimal-error{color:#b42318;margin:0;font-size:13px}.numberline-layout{grid-template-columns:310px minmax(0,1fr);align-items:start;gap:20px;display:grid}.numberline-controls{gap:20px;padding:22px;display:grid}.control-section{border-bottom:1px solid #ebe9e3;gap:13px;padding-bottom:20px;display:grid}.control-section:last-child{border-bottom:0;padding-bottom:0}.control-section h2{margin:0;font-size:17px}.control-row{grid-template-columns:1fr 1fr;gap:10px;display:grid}.checkbox-row{color:#475467;align-items:center;gap:9px;font-size:14px;display:flex}.checkbox-row input{accent-color:#2f80d9;width:17px;height:17px}.marker-color{background:#fff;border:1px solid #cbc9c2;border-radius:10px;width:100%;height:42px;padding:4px}.numberline-workspace{grid-template-rows:auto 1fr auto;gap:22px;min-height:570px;padding:28px clamp(18px,4vw,44px);display:grid}.workspace-toolbar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;display:flex}.workspace-toolbar h2{margin:0;font-size:18px}.workspace-actions{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:12px;display:flex}.compact-button{height:38px;padding:0 13px;font-size:13px}.numberline-canvas{touch-action:none;-webkit-user-select:none;user-select:none;background:#fcfcfa;border:1px solid #eeece7;border-radius:16px;min-height:330px;position:relative;overflow:hidden}.numberline-axis{cursor:crosshair;background:#102a54;border-radius:5px;height:5px;position:absolute;top:56%;left:7%;right:7%}.tick{pointer-events:none;background:#102a54;width:2px;height:24px;position:absolute;top:50%;transform:translate(-50%,-50%)}.tick.major{width:3px;height:34px}.tick-label{white-space:nowrap;color:#344054;font-size:13px;font-weight:700;position:absolute;top:25px;left:50%;transform:translate(-50%)}.line-marker{cursor:grab;touch-action:none;z-index:2;justify-items:center;min-width:76px;display:grid;position:absolute;top:-78px;transform:translate(-50%)}.line-marker:active{cursor:grabbing}.marker-card{color:#fff;white-space:nowrap;border-radius:9px;justify-items:center;gap:2px;padding:7px 10px;font-size:12px;font-weight:750;display:grid;box-shadow:0 5px 13px #102a5429}.marker-card small{opacity:.88;font-size:11px}.marker-pointer{border-left:8px solid #0000;border-right:8px solid #0000;border-top:13px solid var(--marker-color);width:0;height:0}.marker-stem{background:var(--marker-color);width:3px;height:24px}.marker-list{flex-wrap:wrap;gap:9px;min-height:36px;display:flex}.marker-chip{background:#fff;border:1px solid #e2e0da;border-radius:999px;align-items:center;gap:7px;padding:8px 10px;font-size:13px;display:inline-flex}.marker-chip-dot{background:var(--marker-color);border-radius:50%;width:11px;height:11px}.marker-color-select{color:#344054;background:#fff;border:1px solid #d8d5ce;border-radius:8px;height:28px;padding:0 5px;font-size:12px}.marker-chip button{color:#9b2c21;cursor:pointer;background:0 0;border:0;padding:0 2px}.empty-markers{color:#7a8492;font-size:13px}@media (max-width:900px){.numberline-layout{grid-template-columns:1fr}.numberline-controls{grid-template-columns:repeat(2,minmax(0,1fr))}.control-section{border-bottom:0;padding:0}}@media (max-width:760px){.decimal-scale{grid-template-columns:repeat(3,auto)}.decimal-scale .drag-track{grid-area:2/1/auto/-1;justify-self:center}}@media (max-width:620px){.tool-main{width:min(100% - 24px,1180px);padding-top:30px}.tool-page-header{height:68px}.numberline-controls,.control-row{grid-template-columns:1fr}.decimal-stage{min-height:340px;padding-inline:8px}.decimal-dragger{min-height:210px;padding-inline:6px}.decimal-scale{gap:7px}.decimal-scale .secondary-button{padding:0 9px;font-size:12px}.numberline-workspace{padding:18px 10px}.workspace-actions{justify-content:flex-start}.tick-label{font-size:11px}}@media print{.tool-page-header,.numberline-controls,.workspace-toolbar,.marker-list{display:none!important}.tool-main{width:100%;padding:0}.numberline-layout{display:block}.numberline-workspace{min-height:650px;box-shadow:none;border:0}}@media (prefers-reduced-motion:reduce){.drag-track span{transition:none}}.tick.minor{opacity:.75;width:1px;height:13px}