.ll-workspace[data-course-id="math-m1-operations"]{--ll-ink:#173f51;--ll-muted:#456070}
.ll-workspace[data-course-id="math-m1-operations"] .ll-header{border-bottom:3px solid #80afbc;padding-bottom:22px}
.ll-workspace[data-course-id="math-m1-operations"] .ll-road{grid-template-columns:repeat(3,minmax(0,1fr))}
.ll-workspace[data-course-id="math-m1-operations"] .ll-choices{grid-template-columns:1fr}
.ll-workspace[data-course-id="math-m1-operations"] .ll-classify label{grid-template-columns:27px minmax(0,1fr) minmax(180px,.6fr)}
.ll-workspace[data-course-id="math-m1-operations"] .ll-classify .ll-card-text{font-size:1rem;line-height:1.65;text-align:left}
.ll-workspace[data-course-id="math-m1-operations"] .ll-order .ll-card-text{display:block;line-height:1.65}
.m1o-figure{color:#173f51;min-width:0;border:1px solid #a9c9cf;background:#fbfefd;overflow:hidden}
.m1o-heading{display:grid;gap:7px;background:#e4f3f3;padding:20px 24px!important;border-bottom:1px solid #a9c9cf;color:#173f51!important}
.m1o-heading>span{font-size:.74rem;font-weight:800;letter-spacing:.07em}
.m1o-heading>strong{font-size:1.4rem;line-height:1.3}
.m1o-content{padding:20px 24px;line-height:1.7;min-width:0;overflow-wrap:anywhere}
.m1o-content p{margin:12px 0}.m1o-content h4{font-size:1.2rem;margin:0 0 14px;line-height:1.4}
.m1o-content ol{padding-left:24px;display:grid;gap:10px}
.m1o-equation{font-size:1.32rem;line-height:1.7;font-weight:650;font-variant-numeric:tabular-nums}
.m1o-equation strong{color:#124b58}
.m1o-example+.m1o-example{border-top:2px solid #a9c9cf;margin-top:28px;padding-top:26px}
.m1o-step{border:1px solid #afc4c9;border-radius:12px;background:#fff;margin:12px 0;overflow:hidden}
.m1o-step>summary{cursor:pointer;min-height:52px;padding:12px 14px;line-height:1.6;font-size:1rem;font-weight:750;background:#edf5f6}
.m1o-step>summary::marker{color:#24667a}
.m1o-step>summary:focus-visible{outline:3px solid #864224;outline-offset:-4px}
.m1o-step-number{display:inline-grid;place-items:center;background:#215c70;color:#fff;border-radius:50%;height:27px;min-width:27px;margin:0 9px 0 4px;font-size:.9rem}
.m1o-step-body{padding:4px 18px 15px;min-width:0}
.m1o-rule{border-left:4px solid #97592a;background:#fff1df;padding:12px 16px;color:#5f3b22}
.m1o-check{background:#eaf4e9;border:1px solid #b2c8ab;border-radius:12px;padding:16px 18px;margin-top:18px}
.m1o-check>strong{color:#2d552d}.m1o-check p:last-child{margin-bottom:0}
.m1o-column{width:100%;max-width:380px;margin:18px auto 6px;border-collapse:collapse;table-layout:fixed;font-variant-numeric:tabular-nums}
.m1o-column caption{text-align:left;margin-bottom:10px;font-size:1rem;font-weight:750;line-height:1.6}
.m1o-column th:first-child{width:56%;text-align:left;font-size:.83rem;font-weight:650;line-height:1.5;padding:8px 6px}
.m1o-column td,.m1o-column th:not(:first-child){width:14.66%;text-align:center;vertical-align:middle;padding:8px 3px}
.m1o-column td{font-size:1.55rem;font-weight:750;font-family:ui-monospace,Consolas,monospace}
.m1o-column thead{background:#eef3f4}.m1o-column th abbr{text-decoration:none}
.m1o-column td{border-left:1px dashed #b4c7cc}
.m1o-column .m1o-line{border-bottom:2px solid #476974}
.m1o-column .m1o-units{background:#e5f2f8}.m1o-column .m1o-tens{background:#fff0dc}.m1o-column .m1o-total{background:#e6f1e5}
.m1o-key{font-size:.82rem;color:#456070}
.m1o-place-value{display:flex;align-items:stretch;justify-content:center;gap:6px;margin:18px 0}
.m1o-place-value>span:not(.m1o-comma){display:grid;place-items:center;background:#e7f1f5;border:1px solid #abc5d0;border-radius:9px;padding:8px;min-width:0;flex:1;font-size:.8rem}
.m1o-place-value b{font-size:2rem}.m1o-place-value .m1o-comma{font-size:2rem;font-weight:800;align-self:center}
.m1o-scale-pair{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:20px 0}
.m1o-scale-pair>div{display:grid;gap:4px;justify-items:center;border:1px solid #aac5d3;border-radius:12px;background:#e5f2f8;padding:12px 8px}
.m1o-scale-pair>div:last-child{background:#fff0dc;border-color:#d9bd95}
.m1o-scale-pair span{font-size:1.8rem;font-weight:750;font-variant-numeric:tabular-nums}.m1o-scale-pair b{padding:3px 10px;background:#fff;border-radius:6px}
.m1o-pack-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.m1o-pack{display:grid;justify-items:center;gap:10px;border:1px solid #9ebbc8;border-radius:14px;background:#e8f2f8;padding:14px 8px;font-size:.88rem}
.m1o-pack:nth-child(even){background:#fff0dc;border-color:#d9bd95}.m1o-pack>strong{font-size:.83rem}
.m1o-dots{display:grid;grid-template-columns:repeat(4,12px);gap:6px}.m1o-dots i{width:12px;height:12px;background:#235e73;border-radius:50%}
.m1o-split{display:grid;grid-template-columns:10fr 4fr;border:2px solid #4d7685;border-radius:12px;overflow:hidden;margin:20px 0}
.m1o-split>div{display:grid;gap:8px;text-align:center;padding:16px 8px;background:#fff0dc}.m1o-split>div:last-child{border-left:2px solid #4d7685;background:#e5f2f8}.m1o-split strong{font-size:1.7rem}.m1o-split b{font-size:1.35rem}
.m1o-division-model{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin:18px 0}.m1o-division-model>div{display:grid;gap:8px;background:#e5f2f8;border:1px solid #aac5d3;border-radius:12px;padding:14px;flex:1;min-width:125px}.m1o-division-model>.m1o-remainder{background:#fff0dc;border-color:#d9bd95}
.m1o-comparison{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.m1o-comparison>section{padding:18px;background:#e8f3f6;border:1px solid #aac5d3;border-radius:12px}.m1o-comparison>section:last-child{background:#fff0dc;border-color:#d9bd95}
.m1o-rolls{display:grid;gap:16px;margin:18px 0}.m1o-roll>strong{font-size:.9rem}.m1o-roll>div{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));margin-top:7px;border:1px solid #477484;border-radius:8px;overflow:hidden}.m1o-roll span{text-align:center;padding:10px 2px;background:#dceef4;border-right:1px dashed #477484;font-weight:750}.m1o-roll span:nth-child(even){background:#ffebcb}.m1o-roll span:last-child{border-right:0}
.m1o-challenge-guide{padding:18px 20px;margin:18px 0;border:1px solid #aac5d3;border-radius:12px;background:#edf5f6;line-height:1.7}.m1o-challenge-guide ol{padding-left:24px}.m1o-challenge-guide p{margin-bottom:0}
.m1o-notebook-preview{background:#edf5f6;border:1px solid #aac5d3;border-radius:12px;padding:18px;margin-bottom:18px;line-height:1.7;overflow-wrap:anywhere}.m1o-notebook-preview [data-m1o-draft]{white-space:pre-wrap}.m1o-notebook-preview small{display:block;color:#456070}
@media(max-width:1000px){.ll-workspace[data-course-id="math-m1-operations"] .ll-make-layout{grid-template-columns:1fr}.ll-workspace[data-course-id="math-m1-operations"] .ll-road{grid-template-columns:repeat(2,minmax(0,1fr))}.ll-workspace[data-course-id="math-m1-operations"] .ll-classify label{grid-template-columns:27px minmax(0,1fr)}.ll-workspace[data-course-id="math-m1-operations"] .ll-classify select{grid-column:2;width:100%}}
@media(max-width:560px){.m1o-heading{padding:16px!important}.m1o-content{padding:16px}.m1o-heading>strong{font-size:1.2rem}.m1o-pack-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.m1o-comparison{grid-template-columns:1fr}.m1o-step>summary{padding:12px 9px}.m1o-step-body{padding:4px 12px 12px}.m1o-equation{font-size:1.12rem}.m1o-scale-pair{gap:8px}.m1o-scale-pair strong{font-size:.9rem}.m1o-column td{font-size:1.35rem}.m1o-column th:first-child{font-size:.8rem}.m1o-split>div{padding:12px 4px;font-size:.85rem}}
/* The arithmetic stays still and each disclosure follows the learner's pace. */
.ll-workspace[data-course-id="math-m1-operations"][data-motion="reduced"] .m1o-figure{animation:none;transition:none}
@media(prefers-reduced-motion:reduce){.m1o-figure,.m1o-step{animation:none;transition:none}}