.grade5-topic-shell{--g5-orange:#f58a3b;--g5-amber:#ffb34f;--g5-peach:#e9a584;--g5-cream:#f2dfd5;--g5-plum:#281a32;--g5-plum-2:#33203d;--g5-line:#52364f;background:#140e1c;border-color:#56374f;box-shadow:0 28px 80px #05020870,inset 0 1px #ffffff09}.grade5-premium-header{isolation:isolate;background:radial-gradient(at 86% 78%,#ad56354a 0,#0000 46%),radial-gradient(at 22% 95%,#63354a5c 0,#0000 56%),linear-gradient(115deg,#1b1325 0%,#291a34 53%,#1b1428 100%);border-bottom:1px solid #68414a;align-items:center;min-height:420px;padding:55px 58px 60px;display:flex;position:relative;overflow:hidden}.grade5-premium-header:before{z-index:2;content:"";pointer-events:none;background:linear-gradient(90deg,#211629 0%,#211629e8 41%,#0000 66%);position:absolute;inset:0}.grade5-premium-header .reference-article-heading{z-index:3;text-shadow:0 2px 16px #140a1cb8;max-width:57%;padding:12px 0;position:relative}.grade5-premium-header .reference-article-heading>span{color:var(--g5-orange);letter-spacing:.12em}.grade5-premium-header h1{color:#f5e4dc;letter-spacing:-.052em;text-wrap:balance;max-width:760px;margin:15px 0 19px;font-size:clamp(2.6rem,4.6vw,4.5rem);line-height:1.05}.grade5-premium-header p{color:#dfc5bd;max-width:600px;font-size:1.17rem;line-height:1.65}.grade5-premium-header:after{content:"";background:linear-gradient(90deg,var(--g5-orange),var(--g5-amber));border-radius:4px 4px 0 0;width:86px;height:4px;position:absolute;bottom:0;left:58px}.grade5-topic-hero{z-index:1;pointer-events:none;width:67%;height:100%;margin:0;position:absolute;bottom:0;right:0;overflow:hidden}.grade5-topic-hero:after{z-index:3;content:"";pointer-events:none;background:linear-gradient(#0000,#211629b0);height:10%;position:absolute;bottom:0;left:0;right:0}.grade5-topic-hero-glow{z-index:2;background:linear-gradient(90deg,#211629 0%,#0000 42%),linear-gradient(#0000 72%,#29192770);position:absolute;inset:0}.grade5-topic-mascot{z-index:1;object-fit:cover;object-position:48% 48%;filter:saturate(.88)brightness(.9);width:100%;height:100%;display:block;position:absolute;inset:0}.grade5-topic-motif{z-index:4;opacity:.82;transform-origin:50%;filter:drop-shadow(0 8px 16px #0a0511b8);place-items:center;width:35%;height:35%;display:grid;position:absolute;bottom:8%;right:3%;transform:rotate(-6deg)scale(.63)}.grade5-topic-motif>*{max-width:100%}.g5h-decimal-mark{color:#ffd0ae;gap:6px;font-size:3.2rem;font-weight:950;display:grid}.g5h-decimal-mark small{letter-spacing:.08em;font-size:.8rem}.g5h-angle{fill:none;stroke:#ffbd87;stroke-width:4px;stroke-linecap:round;width:180px}.g5h-angle text{fill:#ffbd87;stroke:none;font-size:42px}.g5h-digits{grid-template-columns:70px 100px 1fr;align-items:center;gap:10px;width:82%;display:grid}.g5h-digits span{color:#ffe0d2;font-variant-numeric:tabular-nums;background:#352133;border:1px solid #7b4e54;border-radius:18px;place-items:center;min-height:72px;font-size:clamp(1.45rem,2.7vw,2.15rem);font-weight:950;display:grid}.g5h-digits span:nth-child(2){background:#563028}.g5h-digits span:nth-child(3){color:#ffd0b8;background:#6b3426;border-color:#b9633e}.g5h-digits small{color:#bda6ae;letter-spacing:.08em;text-align:center;text-transform:uppercase;grid-column:1/-1;font-weight:800}.g5h-number-line{color:#dac6c6;justify-content:space-between;width:84%;padding-top:20px;font-size:.86rem;font-weight:850;display:flex;position:relative}.g5h-number-line>div{background:linear-gradient(90deg,#76536e,var(--g5-orange));border-radius:9px;width:100%;height:4px;position:absolute;top:18px;left:0;box-shadow:0 0 18px #f58a3b3d}.g5h-number-line>div:after{border-top:7px solid #0000;border-bottom:7px solid #0000;border-left:13px solid var(--g5-orange);content:"";position:absolute;top:-5px;right:-2px}.g5h-number-line span{text-align:center;padding-top:22px;position:relative}.g5h-number-line span i{background:#d1a58f;border-radius:4px;width:4px;height:21px;position:absolute;top:-7px;left:50%;transform:translate(-50%)}.g5h-number-line span.active{color:#ffc096}.g5h-number-line span.active i{background:var(--g5-orange);border:3px solid #27172e;border-radius:50%;width:16px;height:16px;top:-5px}.g5h-operation{color:#f3ddd6;text-align:center;grid-template-columns:1fr auto 1fr;align-items:center;gap:14px;width:82%;font-size:clamp(1.5rem,3vw,2.25rem);font-weight:950;display:grid}.g5h-operation span{background:#2f1e38;border:1px solid #644257;border-radius:17px;padding:18px 10px}.g5h-operation i{color:var(--g5-orange);font-style:normal}.g5h-operation b{color:#ffbd91;grid-column:1/-1;font-size:.7em}.g5h-operation.equation span:first-child{background:#4d292d;border-color:#9a5b4d}.g5h-multiplication{justify-items:center;gap:18px;display:grid}.g5h-multiplication>div{grid-template-columns:repeat(6,14px);gap:10px;display:grid}.g5h-multiplication i{background:linear-gradient(145deg,var(--g5-amber),var(--g5-orange));border-radius:50%;width:14px;height:14px;box-shadow:0 5px 10px #11081780}.g5h-multiplication strong{color:#f5ded6;font-size:2rem}.g5h-multiplication small{color:#e9a584;font-size:1.05rem;font-weight:850}.g5h-powers{justify-items:center;gap:14px;display:grid}.g5h-powers>*{color:#ecd7d3;background:#281a32;border:1px solid #5d3d55;border-radius:13px;padding:11px 18px}.g5h-powers strong{color:#ffd0b2;border-color:#a85c42;font-size:1.65rem}.g5h-powers span{font-size:1.45rem;font-weight:900}.g5h-powers small{color:#bea8af;font-weight:800}.g5h-area{grid-template-columns:160px 1fr;align-items:center;gap:22px;display:grid}.g5h-area-grid{border:2px solid #f28a3b;border-radius:12px;grid-template-columns:repeat(6,1fr);width:160px;height:118px;display:grid;overflow:hidden;transform:rotate(-3deg)}.g5h-area-grid i{background:#8d49324c;border-bottom:1px solid #a9685a;border-right:1px solid #a9685a}.g5h-area strong{color:#ffd0b0;white-space:nowrap;font-size:1.65rem}.g5h-volume{grid-template-columns:180px 1fr;align-items:center;display:grid}.g5h-cube{filter:drop-shadow(0 14px 18px #08040b70);width:190px}.g5h-cube .top{fill:#d07750;stroke:#ffbd87;stroke-width:2px}.g5h-cube .left{fill:#6a394a;stroke:#f1a070;stroke-width:2px}.g5h-cube .right{fill:#422844;stroke:#b76c64;stroke-width:2px}.g5h-cube .grid{fill:none;stroke:#ffd1a650;stroke-width:1px}.g5h-volume strong{color:#ffd0b0;white-space:nowrap;font-size:1.35rem}.g5h-frac{min-width:42px;color:inherit;text-align:center;vertical-align:middle;align-items:center;display:inline-grid}.g5h-frac b{font-size:inherit;padding:2px 8px;line-height:1.05}.g5h-frac b:first-child{border-bottom:2px solid}.g5h-fraction-pie{color:#ffd1b4;align-items:center;gap:22px;font-size:2rem;display:flex}.g5h-fraction-pie svg{width:155px}.g5h-fraction-pie circle{fill:#271932;stroke:#bd725a;stroke-width:3px}.g5h-fraction-pie path{fill:#d76f42;stroke:#ffb075;stroke-width:2px}.g5h-fraction-bars{color:#f2dcd5;grid-template-columns:140px auto 25px 140px auto;align-items:center;gap:10px;font-size:1.1rem;display:grid}.g5h-fraction-bars>div{border:1px solid #6c4a61;border-radius:10px;grid-template-columns:repeat(8,1fr);height:52px;display:grid;overflow:hidden}.g5h-fraction-bars>div i{background:#25182e;border-right:1px solid #5f4057}.g5h-fraction-bars>div i.on{background:linear-gradient(#f7a05a,#c85b35)}.g5h-fraction-bars>strong{color:#ffad78;font-size:1.65rem}.g5h-mixed,.g5h-fraction-ops{color:#f6ddd4;align-items:center;gap:15px;font-size:2rem;font-weight:950;display:flex}.g5h-mixed>span{color:#ffbd93;background:#4b2933;border-radius:16px;padding:15px 19px}.g5h-mixed i,.g5h-fraction-ops i{color:var(--g5-orange);font-style:normal}.g5h-denominator{color:#f3dbd4;gap:14px;font-size:1.35rem;display:grid}.g5h-denominator>span{background:#25182e;border:1px solid #5c3b52;border-radius:15px;align-items:center;gap:15px;padding:10px 17px;display:flex}.g5h-denominator>span:last-child{border-color:#9a5c4a;margin-left:40px}.g5h-denominator b{color:var(--g5-orange)}.g5h-fraction-ops{color:#f4d9d1;background:#2b1b34;border:1px solid #785063;border-radius:20px;padding:22px 28px}.g5h-model-bar{color:#f3dcd6;justify-items:center;gap:20px;display:grid}.g5h-model-bar>div{border:2px solid #b96950;border-radius:13px;grid-template-columns:repeat(5,50px);height:62px;display:grid;overflow:hidden}.g5h-model-bar>div i{background:#25182e;border-right:1px solid #684253}.g5h-model-bar>div i.on{background:linear-gradient(145deg,#f4a35f,#cc6039)}.g5h-model-bar strong{font-size:1.3rem}.g5h-rounding{color:#f2ddd7;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;font-size:2.15rem;font-weight:950;display:grid}.g5h-rounding span{background:#2c1c35;border-radius:16px;padding:16px}.g5h-rounding span b{border:2px solid var(--g5-orange);color:#ffb17f;border-radius:50%;place-items:center;width:1.25em;height:1.35em;margin-left:3px;display:inline-grid}.g5h-rounding i{color:var(--g5-orange);font-style:normal}.g5h-rounding strong{color:#ffd0b1}.g5h-rounding small{color:#bba5ae;text-align:center;grid-column:1/-1;font-size:.85rem}.g5h-decimal-column{color:#f1dcd6;justify-items:end;width:210px;font:900 1.9rem/1.45 ui-monospace,SFMono-Regular,Consolas,monospace;display:grid}.g5h-decimal-column span:nth-child(2){color:#ffb386}.g5h-decimal-column i{background:var(--g5-orange);width:100%;height:2px}.g5h-decimal-column strong{color:#ffd0b1}.g5h-logic{gap:12px;display:grid}.g5h-logic span{color:#e9d3cf;background:#25182e;border:1px solid #5c3c53;border-radius:15px;align-items:center;gap:14px;padding:14px 20px;font-size:1.2rem;font-weight:900;display:flex}.g5h-logic i{color:#ffc097;background:#5d3e4f;border-radius:50%;place-items:center;width:34px;height:34px;font-style:normal;display:grid}.g5h-logic span:last-child{opacity:.72}.g5h-logic span:last-child i{color:#d89a8f;background:#352537}.g5h-tree{color:#f3d9d0;grid-template-rows:repeat(3,52px);grid-template-columns:repeat(4,48px);place-items:center;gap:9px;font-weight:950;display:grid;position:relative}.g5h-tree>*{background:#2c1b34;border:1px solid #80505e;border-radius:50%;place-items:center;width:44px;height:44px;display:grid}.g5h-tree strong{color:#ffc092;background:#673626;grid-column:2/4}.g5h-tree span:first-of-type{grid-column:1/3}.g5h-tree span:last-of-type{grid-column:3/5}.g5h-tree i{color:#ffc09a;font-style:normal}.g5h-tree:before,.g5h-tree:after{content:"";opacity:.45;border-bottom:1px solid #b8654f;width:160px;height:100px;position:absolute;transform:rotate(22deg)}.g5h-tree:after{transform:rotate(-22deg)}.g5h-models{align-items:center;gap:28px;display:flex}.g5h-percent{background:conic-gradient(var(--g5-orange) 0 25%,#35233f 25%);border-radius:50%;place-items:center;width:118px;height:118px;display:grid;box-shadow:inset 0 0 0 15px #211529}.g5h-percent span{color:#ffc19c;background:#25182e;border-radius:50%;place-items:center;width:72px;height:72px;font-weight:950;display:grid}.g5h-route{color:#f0d9d2;grid-template-columns:auto 130px auto;align-items:center;gap:6px;display:grid}.g5h-route i{color:#ffbd91;background:#41242e;border:1px solid #bd6c50;border-radius:50%;place-items:center;width:35px;height:35px;font-style:normal;font-weight:950;display:grid}.g5h-route>span{background:repeating-linear-gradient(90deg,var(--g5-orange) 0 12px,transparent 12px 20px);height:3px}.g5h-route b{color:#d8b4ad;text-align:center;grid-column:1/-1;margin-top:12px}.grade5-topic-shell .material-content{background:linear-gradient(#17101f,#120d19);gap:22px;padding:48px 58px 62px}.grade5-reading{color:#ead8d4;gap:25px;min-width:0;display:grid}.grade5-reading>*{min-width:0}.grade5-reading .material-heading{color:#f5e2da;letter-spacing:-.035em;margin:30px 0 0;padding-left:21px;scroll-margin-top:28px;font-size:clamp(1.65rem,3vw,2.15rem);line-height:1.2;position:relative}.grade5-reading .material-heading:before{content:"";background:linear-gradient(var(--g5-amber),var(--g5-orange));border-radius:5px;width:5px;height:1.05em;position:absolute;top:.14em;left:0;box-shadow:0 0 18px #f58a3b42}.grade5-reading .material-paragraph{color:#d9c7c7;margin:0;font-size:1.13rem;line-height:1.82}.grade5-card,.grade5-check,.grade5-lesson-map,.grade5-optional{background:linear-gradient(145deg,#24172d,#1c1426);border:1px solid #573a53;border-radius:22px;padding:27px 29px;box-shadow:0 15px 35px #07030c2e,inset 0 1px #ffffff09}.grade5-eyebrow{color:var(--g5-orange);letter-spacing:.12em;text-transform:uppercase;margin-bottom:12px;font-size:.74rem;font-weight:900;line-height:1.5;display:block}.grade5-card h3,.grade5-optional strong{color:#f2dcd4;margin:0 0 16px;font-size:1.28rem;line-height:1.4;display:block}.grade5-card p+p{margin-top:12px}.grade5-intro{background:linear-gradient(145deg,#35202f,#21162b);border-color:#704250}.grade5-example{background:linear-gradient(145deg,#321f31,#20162a);border-color:#8d554e}.grade5-example ol,.grade5-steps{color:#e3ceca;margin:0;padding-left:1.5em;font-size:1.13rem;line-height:1.8}.grade5-example li,.grade5-steps li{margin-top:12px;padding-left:.35em}.grade5-example li:first-child,.grade5-steps li:first-child{margin-top:0}.grade5-example li::marker{color:var(--g5-orange);font-weight:900}.grade5-steps li::marker{color:var(--g5-orange);font-weight:900}.grade5-note{border-left:4px solid var(--g5-orange);background:linear-gradient(100deg,#35202b,#21162a)}.grade5-note .material-paragraph{font-size:1.08rem}.grade5-lesson-map{background:linear-gradient(135deg,#34202f,#20152a);border-color:#74474d;position:relative;overflow:hidden}.grade5-lesson-map:after{content:"";border:22px solid #f58a3b0d;border-radius:50%;width:130px;height:130px;position:absolute;bottom:-46px;right:-28px}.grade5-lesson-map ol{z-index:1;counter-reset:g5-map;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 26px;margin:0;padding:0;list-style:none;display:grid;position:relative}.grade5-lesson-map li{counter-increment:g5-map}.grade5-lesson-map a{color:#e6d3d0;grid-template-columns:28px 1fr;align-items:center;gap:9px;font-weight:800;line-height:1.45;display:grid}.grade5-lesson-map a:before{color:#ffb887;content:counter(g5-map);background:#51303a;border-radius:50%;place-items:center;width:27px;height:27px;font-size:.72rem;font-weight:950;display:grid}.grade5-lesson-map a:hover{color:#ffc09a}.grade5-reading a:focus-visible,.grade5-reading summary:focus-visible{outline:2px solid var(--g5-orange);outline-offset:5px;border-radius:4px}.grade5-check{background:linear-gradient(145deg,#321e2b,#201528);border-color:#75484a}.grade5-check details{border-top:1px solid #674047;margin-top:16px;padding-top:14px}.grade5-check summary,.grade5-optional summary{cursor:pointer;color:#f0b08d;font-weight:800;line-height:1.5}.grade5-check details p{color:#dcc8c7;margin-bottom:0;font-size:1.08rem;line-height:1.8}.grade5-optional summary strong{margin-bottom:0}.grade5-optional[open]>.grade5-reading{margin-top:24px}.grade5-figure,.grade5-column-figure,.senior-diagram{background:radial-gradient(circle at 75% 0,#6d352329,#0000 35%),#1b1324;border:1px solid #67404f;border-radius:20px;margin:0;overflow:hidden;box-shadow:inset 0 1px #ffffff08}.grade5-figure svg,.senior-diagram svg{width:100%;max-width:680px;height:auto;margin:auto;padding:15px;display:block}.grade5-figure text{fill:#f0ddd7;text-anchor:middle;font:800 20px Arial,Helvetica,sans-serif}.grade5-figure text.g5-small{font-size:18px}.grade5-figure figcaption,.grade5-column-figure figcaption,.senior-diagram figcaption{color:#cfb9bd;border-top:1px solid #513443;padding:16px 20px;font-size:1rem;line-height:1.6}.g5-line,.g5-tick{fill:none;stroke:#c2806e;stroke-width:2.5px}.g5-accent-line{fill:none;stroke:var(--g5-orange);stroke-width:3px;stroke-linecap:round;stroke-linejoin:round}.g5-grid{fill:none;stroke:#684353;stroke-width:1px}.g5-dot{fill:var(--g5-orange);stroke:#211527;stroke-width:2px}.g5-fill{fill:#9a4f3c;stroke:#f1a675;stroke-width:1.5px}.g5-empty{fill:#30203a;stroke:#9f6c79;stroke-width:1.5px}.g5-top{fill:#cf7958;stroke:#f2ad80;stroke-width:1px}.g5-side{fill:#714156;stroke:#d18c72;stroke-width:1px}.grade5-column,.grade5-division{color:#ffd0b2;font-variant-numeric:tabular-nums;width:max-content;margin:26px auto;font:600 1.6rem/1.7 ui-monospace,SFMono-Regular,Consolas,monospace}.grade5-column>div{display:flex}.grade5-column span,.grade5-column b{text-align:center;width:1.35em}.grade5-column-result{border-top:2px solid var(--g5-orange);margin-top:4px}.grade5-division{align-items:flex-start;gap:18px;display:flex}.grade5-division-row{grid-template-columns:1em repeat(4,1.1em);display:grid}.grade5-division-row>span{justify-content:space-around;display:flex}.grade5-division-row i{text-align:center;width:1.1em;font-style:normal}.grade5-division-row b{grid-area:1/1;font-weight:500}.grade5-division-row.subtract>span{border-bottom:1px solid #d1795a}.grade5-division-answer{border-left:2px solid var(--g5-orange);padding-left:12px}.grade5-division-answer>div:first-child{border-bottom:2px solid var(--g5-orange)}.grade5-reading .material-table-scroll{background:#191120;border-color:#60404f}.grade5-reading .material-table{font-size:1.05rem;line-height:1.6}.grade5-reading .material-table th{color:#ffc09c;background:#422630;border-color:#6c4246}.grade5-reading .material-table td{border-color:#46303f}.grade5-reading .grade6-diagram{min-width:0}.grade5-topic-shell .reference-related{background:#110c18;border-color:#432c3e}.grade5-topic-shell .reference-related a{background:#1b1223;border-color:#543549}.grade5-topic-shell .reference-related a:hover{border-color:var(--g5-orange)}.grade5-topic-shell .reference-related a>span,.grade5-topic-shell .reference-related a>b{color:var(--g5-orange)}.grade5-topic-shell .reference-pager{background:#110c18;border-color:#482f41}.grade5-topic-shell .reference-pager a{background:linear-gradient(145deg,#2b1b2e,#1b1323);border-color:#8c513f}.grade5-topic-shell .reference-pager a:hover{border-color:var(--g5-orange);background:#34202e}.grade5-topic-shell .reference-pager a.next{color:#1a101b;background:linear-gradient(135deg,#dc6b35,#f59445);border-color:#f58a3b}.grade5-topic-shell .reference-pager a.next small,.grade5-topic-shell .reference-pager a.next strong{color:#1d111a}.grade5-topic-shell .reference-pager small{color:#f0a077}@media (max-width:980px){.grade5-premium-header{min-height:390px;padding:45px 38px}.grade5-premium-header:after{left:38px}.grade5-premium-header .reference-article-heading{max-width:62%}.grade5-topic-hero{width:65%}.g5h-fraction-bars{grid-template-columns:100px auto 20px 100px auto}.g5h-models{gap:14px}.g5h-route>span{width:85px}.g5h-volume{grid-template-columns:150px 1fr}.g5h-cube{width:155px}}@media (max-width:760px){.grade5-premium-header{min-height:0;padding:35px 24px 0;display:block}.grade5-premium-header .reference-article-heading{max-width:100%}.grade5-premium-header h1{font-size:clamp(2.45rem,12vw,3.6rem)}.grade5-premium-header p{font-size:1.05rem}.grade5-premium-header:before{display:none}.grade5-premium-header:after{left:24px}.grade5-topic-hero{width:calc(100% + 48px);height:280px;margin:18px -24px 0;position:relative;bottom:auto;right:auto}.grade5-topic-hero-glow{background:linear-gradient(#0000 65%,#2116295c)}.grade5-topic-mascot{object-position:50% 42%}.grade5-topic-motif{width:40%;height:42%;bottom:4%;right:2%;transform:rotate(-7deg)scale(.55)}.grade5-topic-shell .material-content{padding:34px 20px 44px}.grade5-lesson-map ol{grid-template-columns:1fr}.g5h-volume{grid-template-columns:145px 1fr}.g5h-cube{width:150px}.g5h-models,.g5h-fraction-bars{transform:scale(.86)}.g5h-area{transform:scale(.9)}}@media (max-width:640px){.grade5-reading{gap:20px}.grade5-card,.grade5-check,.grade5-lesson-map,.grade5-optional{border-radius:17px;padding:20px 18px}.grade5-example ol,.grade5-steps{font-size:1.06rem}.grade5-reading .material-heading{font-size:1.55rem}.grade5-figure svg,.senior-diagram svg{padding:6px}.grade5-reading .solid-nets-grid svg{min-width:0}.grade5-reading .material-table-scroll{max-width:100%}.grade5-optional>.grade5-reading .grade5-card{padding:16px 12px}.g5h-digits{grid-template-columns:55px 78px 1fr;width:92%}.g5h-digits span{min-height:60px;font-size:1.2rem}.g5h-operation{gap:7px;width:90%;font-size:1.35rem}.g5h-fraction-bars{transform:scale(.72)}.g5h-volume{transform:scale(.82)}.g5h-rounding{font-size:1.55rem}.g5h-model-bar{transform:scale(.82)}.g5h-models{transform:scale(.7)}.g5h-area{transform:scale(.78)}}.grade6-premium-header{isolation:isolate;background:radial-gradient(at 86% 78%,#ad56354a 0,#0000 46%),radial-gradient(at 22% 95%,#63354a5c 0,#0000 56%),linear-gradient(115deg,#1b1325 0%,#291a34 53%,#1b1428 100%);border-bottom:1px solid #68414a;align-items:center;min-height:420px;padding:55px 58px 60px;display:flex;position:relative;overflow:hidden}.grade6-premium-header:before{z-index:2;content:"";pointer-events:none;background:linear-gradient(90deg,#211629 0%,#211629e8 41%,#0000 66%);position:absolute;inset:0}.grade6-premium-header .reference-article-heading{z-index:3;text-shadow:0 2px 16px #140a1cb8;max-width:57%;padding:12px 0;position:relative}.grade6-premium-header .reference-article-heading>span{color:#efaa83;letter-spacing:.12em}.grade6-premium-header h1{color:#f5e4dc;letter-spacing:-.05em;text-wrap:balance;max-width:760px;margin:15px 0 19px;font-size:clamp(2.55rem,4.35vw,4.4rem);line-height:1.06}.grade6-premium-header p{color:#dfc5bd;max-width:580px;font-size:1.1rem;line-height:1.6}.grade6-premium-header:after{z-index:4;content:"";background:linear-gradient(90deg,#e59467,#ffbf8e);border-radius:4px 4px 0 0;width:82px;height:4px;position:absolute;bottom:0;left:58px}.grade6-topic-art{z-index:1;pointer-events:none;width:67%;height:100%;margin:0;position:absolute;bottom:0;right:0;overflow:hidden}.grade6-topic-art-glow{z-index:2;background:linear-gradient(90deg,#211629 0%,#0000 42%),linear-gradient(#0000 72%,#29192770);position:absolute;inset:0}.grade6-topic-mascot{z-index:1;object-fit:cover;object-position:48% 48%;filter:saturate(.88)brightness(.9);width:100%;height:100%;display:block;position:absolute;inset:0}@media (max-width:750px){.grade6-premium-header{align-items:flex-start;min-height:440px;padding:32px 28px 215px}.grade6-premium-header:before{background:linear-gradient(#211629 0%,#211629ed 38%,#0000 77%)}.grade6-premium-header .reference-article-heading{max-width:100%}.grade6-premium-header h1{font-size:clamp(2.1rem,8vw,3.1rem)}.grade6-premium-header p{font-size:1rem}.grade6-premium-header:after{left:28px}.grade6-topic-art{width:100%;height:245px;top:auto;bottom:0}.grade6-topic-art-glow{background:linear-gradient(#211629 0%,#0000 35%)}.grade6-topic-mascot{object-position:67% 42%}}.grade7-premium-header{isolation:isolate;background:radial-gradient(at 84% 82%,#a9583540,#0000 48%),linear-gradient(115deg,#1b1325,#291a34 53%,#1b1428);border-bottom:1px solid #68414a;align-items:center;min-height:420px;padding:55px 58px 60px;display:flex;position:relative;overflow:hidden}.grade7-premium-header:before{z-index:2;content:"";pointer-events:none;background:linear-gradient(90deg,#211629 0%,#211629eb 39%,#0000 68%);position:absolute;inset:0}.grade7-premium-header .reference-article-heading{z-index:3;text-shadow:0 2px 16px #140a1cb8;max-width:57%;padding:12px 0;position:relative}.grade7-premium-header .reference-article-heading>span{color:#efa777;letter-spacing:.12em}.grade7-premium-header h1{color:#f5e4dc;letter-spacing:-.05em;text-wrap:balance;max-width:760px;margin:15px 0 19px;font-size:clamp(2.55rem,4.35vw,4.4rem);line-height:1.06}.grade7-premium-header p{color:#dfc5bd;max-width:580px;font-size:1.1rem;line-height:1.6}.grade7-premium-header:after{z-index:4;content:"";background:linear-gradient(90deg,#e59467,#ffbf8e);border-radius:4px 4px 0 0;width:82px;height:4px;position:absolute;bottom:0;left:58px}.grade7-topic-art{z-index:1;pointer-events:none;width:67%;height:100%;margin:0;position:absolute;bottom:0;right:0;overflow:hidden}.grade7-topic-art-glow{z-index:2;background:linear-gradient(90deg,#211629 0%,#0000 42%),linear-gradient(#0000 72%,#29192770);position:absolute;inset:0}.grade7-topic-mascot{z-index:1;object-fit:cover;object-position:52% 50%;filter:saturate(.89)brightness(.91);width:100%;height:100%;display:block;position:absolute;inset:0}@media (max-width:750px){.grade7-premium-header{align-items:flex-start;min-height:440px;padding:32px 28px 215px}.grade7-premium-header:before{background:linear-gradient(#211629 0%,#211629ef 39%,#0000 78%)}.grade7-premium-header .reference-article-heading{max-width:100%}.grade7-premium-header h1{font-size:clamp(2.1rem,8vw,3.1rem)}.grade7-premium-header p{font-size:1rem}.grade7-premium-header:after{left:28px}.grade7-topic-art{width:100%;height:245px;top:auto;bottom:0}.grade7-topic-art-glow{background:linear-gradient(#211629 0%,#0000 46%)}.grade7-topic-mascot{object-position:67% 46%}}@media (max-width:420px){.grade7-premium-header{padding:27px 22px 200px}.grade7-premium-header h1{font-size:2rem}.grade7-premium-header:after{left:22px}.grade7-topic-art{height:220px}}.school-multiplication-guide{color:#ead8d4;gap:18px;max-width:780px;margin:12px 0 26px;display:grid}.school-mult-intro{color:#dccac8;margin:0;font-size:1.07rem;line-height:1.7}.school-mult-board{background:linear-gradient(150deg,#25182e,#17121f);border:1px solid #765064;border-radius:18px;flex-wrap:wrap;justify-content:center;align-items:center;gap:20px 34px;margin:0;padding:22px 24px;display:flex;box-shadow:inset 0 1px #ffffff0a}.school-mult-stack{background-color:#17131f;background-image:linear-gradient(#876a8e13 1px,#0000 1px),linear-gradient(90deg,#876a8e13 1px,#0000 1px);background-size:24px 24px;border:1px solid #60485c;border-radius:13px;flex:none;gap:3px;padding:10px 18px;display:grid}.school-mult-row{text-align:center;color:#f4e3db;font-variant-numeric:tabular-nums;grid-template-columns:1.25em repeat(4,1.5em);align-items:center;min-height:1.38em;font:900 clamp(1.55rem,3vw,2rem)/1.25 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;display:grid}.school-mult-row>span{min-width:0}.school-mult-sign{color:#ee9e79}.school-mult-row.bottom{border-bottom:2px solid #e7b09f;padding-bottom:3px}.school-mult-row.units{color:#ffbb8d}.school-mult-row.tens{color:#b5cfb8;border-bottom:2px solid #e7b09f;padding-bottom:3px}.school-mult-row.total{color:#ffe1cb}.school-mult-board figcaption{color:#d2bfc0;flex:210px;gap:10px;max-width:350px;font-size:.98rem;line-height:1.55;display:grid}.school-mult-board figcaption span:first-child{border-left:3px solid #f1a576;padding-left:12px}.school-mult-board figcaption span:last-child{border-left:3px solid #a6c5ab;padding-left:12px}.school-mult-steps{color:#dfceca;gap:12px;margin:0;padding-left:1.65em;font-size:1.04rem;line-height:1.75;display:grid}.school-mult-steps li{padding-left:.15em}.school-mult-steps li::marker{color:#eea47e;font-weight:900}.school-mult-steps strong{color:#f4d6c7}@media (max-width:540px){.school-mult-board{padding:16px 10px}.school-mult-stack{padding:10px}.school-mult-row{font-size:1.55rem}.school-mult-board figcaption{padding:0 6px}.school-mult-steps{font-size:1rem}}