:root{--navy:#06213f;--navy2:#0b315a;--blue:#1673f9;--blue2:#0b5ee6;--ink:#10233e;--muted:#66758b;--line:#dfe8f4;--bg:#f6fbff;--green:#21b653;--card:#fff;--shadow:0 16px 40px rgba(17,57,101,.12)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:#fff;line-height:1.55}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto}.site-shell{width:min(1180px,calc(100% - 36px));margin:auto}.screen-reader-text{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.site-header{position:sticky;top:0;z-index:999;background:linear-gradient(90deg,#071d38,#082b52);color:#fff;border-bottom:1px solid rgba(255,255,255,.08)}.header-inner{height:76px;display:flex;align-items:center;gap:28px}.brand-wrap{min-width:255px}.brand{display:flex;align-items:center;gap:13px;color:#fff}.brand-copy{display:flex;flex-direction:column;line-height:1}.brand-copy strong{font-size:26px;letter-spacing:-.7px}.brand-copy strong span{color:#42a0ff}.brand-copy 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span{color:var(--blue);font-weight:700;font-size:13px}.entry-content{font-size:17px}.entry-content h2{font-size:29px;margin-top:32px}.entry-content h3{font-size:22px}.entry-content p{margin:1em 0}.entry-content table{width:100%;border-collapse:collapse}.entry-content td,.entry-content th{border:1px solid #dbe5ef;padding:10px}.entry-content blockquote{border-left:4px solid var(--blue);margin-left:0;padding:8px 18px;background:#f2f8ff}.breadcrumbs{font-size:12px;color:#758397;margin-bottom:10px}.term-search{margin:0 0 18px}.term-search input{width:100%;max-width:460px;border:1px solid #d5e2ef;border-radius:9px;padding:12px 14px}.inline-button{display:inline-block}.site-footer{background:#071f3b;color:#dce9f7;padding:42px 0 18px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;gap:28px}.footer-grid .brand{margin-bottom:14px}.footer-grid p{font-size:13px;color:#adc2d9}.footer-grid h3{font-size:14px;color:#fff}.footer-grid>div>a{display:block;font-size:13px;color:#bcd0e3;margin:8px 0}.footer-bottom{border-top:1px solid rgba(255,255,255,.09);padding-top:16px;margin-top:26px;font-size:12px;color:#8faccc}
@media(max-width:1050px){.header-actions .search-button{display:none}.primary-nav{display:none;position:absolute;top:76px;left:0;right:0;background:#08284b;padding:15px 24px}.primary-nav.open{display:block}.menu{display:block}.menu a{padding:10px 0}.menu-toggle{display:block;margin-left:auto}.hero-grid{grid-template-columns:35% 65%}.hero-art{display:none}.subject-grid{grid-template-columns:repeat(3,1fr)}.quick-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:760px){.site-shell{width:min(100% - 24px,1180px)}.header-inner{height:68px}.brand-wrap{min-width:0}.brand-copy strong{font-size:21px}.brand-copy small{display:none}.cube-logo{width:34px;height:34px;transform:scale(.8)}.primary-nav{top:68px}.study-button{display:none}.hero-grid{grid-template-columns:1fr;padding:30px 0}.hero-copy{text-align:center}.hero-copy h1{font-size:32px}.hero-copy h1 span{font-size:38px}.hero-copy>p{margin-left:auto;margin-right:auto}.hero-checks{max-width:440px;margin:20px auto}.solver-row{grid-template-columns:1fr}.solver-tab{padding:10px 12px}.solver-tab span{display:none}.subject-grid{grid-template-columns:repeat(2,1fr)}.how-grid{grid-template-columns:repeat(2,1fr)}.example-grid{grid-template-columns:1fr}.demo-panel,.demo-panel.active{grid-template-columns:1fr}.demo-panel>div{border-right:0;border-bottom:1px solid #e4edf6}.quick-grid,.posts-grid,.footer-grid{grid-template-columns:1fr 1fr}.practice-controls{grid-template-columns:1fr}.section h2{font-size:26px}.archive-head h1,.narrow-content h1{font-size:32px}}
@media(max-width:500px){.hero-checks{grid-template-columns:1fr;text-align:left;padding-left:30px}.subject-grid,.how-grid,.quick-grid,.posts-grid,.footer-grid{grid-template-columns:1fr}.subject-card{min-height:76px}.solver-card{padding:11px}.hero-copy h1 span{font-size:34px}.section{padding:30px 0}.example-tabs button{font-size:11px;padding:10px}.entry-content{font-size:16px}}

/* MathCube v1.1 branding / logo customizer */
.brand-icon-wrap{width:var(--mathcube-brand-icon-size,48px);height:var(--mathcube-brand-icon-size,48px);display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.brand-icon-wrap picture{display:contents}
.brand-icon{display:block;width:100%;height:100%;object-fit:contain;filter:drop-shadow(0 5px 10px rgba(0,0,0,.18))}
.site-header .mathcube-brand{min-height:54px}
.site-footer .brand-icon-wrap{width:52px;height:52px}
.site-footer .brand-icon{filter:drop-shadow(0 5px 12px rgba(0,0,0,.25))}
@media(max-width:760px){.brand-icon-wrap{width:var(--mathcube-brand-icon-mobile-size,38px);height:var(--mathcube-brand-icon-mobile-size,38px)}.site-header .mathcube-brand{min-height:44px}.site-footer .brand-icon-wrap{width:44px;height:44px}}

/* MathCube v1.2 Math Term Learning Template */
.term-hero-section{background:radial-gradient(circle at 85% 15%,#d7f7ff 0,#ecf8ff 37%,#f7fbff 75%);border-bottom:1px solid #e5eef7;padding:38px 0 34px}.term-hero-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(300px,.7fr);gap:36px;align-items:center}.term-hero-section h1{font-size:48px;line-height:1.08;letter-spacing:-1.3px;margin:12px 0 13px}.term-lead{font-size:19px;line-height:1.65;color:#405570;max-width:760px;margin:0}.term-subject-badge{display:inline-flex;background:#e7f3ff;color:#1069d4;border:1px solid #cfe5ff;border-radius:999px;padding:6px 11px;font-size:12px;font-weight:800}.term-hero-actions{display:flex;align-items:center;gap:18px;margin-top:23px}.term-text-link{color:var(--blue);font-weight:750;font-size:14px}.term-at-glance{background:#fff;border:1px solid #deebf7;border-radius:15px;box-shadow:var(--shadow);padding:18px}.term-at-glance h2{font-size:20px;margin:0 0 8px}.term-at-glance>div{padding:12px 0;border-top:1px solid #edf2f7}.term-at-glance>div span{display:block;color:#748399;text-transform:uppercase;letter-spacing:.06em;font-size:10px;font-weight:800;margin-bottom:3px}.term-at-glance>div strong{display:block;font-size:14px;line-height:1.4}.math-display{font-family:Cambria,"Times New Roman",serif}.term-learning-section{background:#f7fbff}.term-content-shell{max-width:1120px;display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:26px;align-items:start}.term-main-column{min-width:0}.term-section-card{background:#fff;border:1px solid #e0eaf4;border-radius:14px;padding:28px;margin-bottom:20px;box-shadow:0 7px 24px rgba(21,64,108,.045);scroll-margin-top:95px}.term-section-kicker{display:inline-block;color:#1471e8;background:#ecf5ff;border-radius:999px;padding:5px 9px;text-transform:uppercase;letter-spacing:.08em;font-size:10px;font-weight:850}.term-section-card h2{font-size:28px;line-height:1.2;margin:9px 0 12px}.term-section-card>p{font-size:17px;color:#43566e}.term-extra-explanation{border-top:1px solid #e8eef5;margin-top:20px;padding-top:8px}.term-example-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:18px}.term-example-card{display:grid;grid-template-columns:31px minmax(0,1fr);gap:10px;align-items:center;border:1px solid #dae7f3;background:#f9fcff;border-radius:10px;padding:12px}.term-example-card>span{width:28px;height:28px;display:grid;place-items:center;background:#dfeeff;color:#1268d2;border-radius:50%;font-size:12px;font-weight:850}.term-example-card code{font-family:Cambria,"Times New Roman",serif;color:#122d4c;font-size:17px;white-space:normal}.term-formula-box{background:linear-gradient(135deg,#eef7ff,#f8fcff);border:1px solid #cfe3f8;border-radius:12px;padding:18px;margin:16px 0 20px}.term-formula-box small{display:block;color:#65778e;font-weight:700;margin-bottom:5px}.term-formula-box div{font-family:Cambria,"Times New Roman",serif;font-size:24px;color:#0c4f9d;overflow-wrap:anywhere}.term-check-list{list-style:none;padding:0;margin:0;display:grid;gap:10px}.term-check-list li{position:relative;padding-left:31px}.term-check-list li:before{content:"✓";position:absolute;left:0;top:1px;width:21px;height:21px;display:grid;place-items:center;border-radius:50%;background:#e6f8ec;color:#159044;font-weight:900;font-size:12px}.term-problem-box{background:#f4f8fd;border:1px solid #dce8f5;border-radius:11px;padding:16px;margin:16px 0}.term-problem-box strong{display:block;font-size:12px;color:#65778c;text-transform:uppercase;letter-spacing:.06em}.term-problem-box p{font-size:19px;margin:5px 0 0}.term-worked-steps{list-style:none;counter-reset:steps;margin:18px 0;padding:0;display:grid;gap:11px}.term-worked-steps li{counter-increment:steps;display:grid;grid-template-columns:35px 1fr;gap:11px;align-items:start}.term-worked-steps li:before{content:counter(steps);width:31px;height:31px;display:grid;place-items:center;border-radius:50%;background:var(--blue);color:#fff;font-weight:850}.term-worked-steps li div{border-bottom:1px solid #edf2f6;padding:4px 0 13px}.term-final-answer{display:flex;align-items:center;gap:12px;background:#edfaef;border:1px solid #bfe7c9;border-radius:11px;padding:14px 16px;margin:17px 0}.term-final-answer>span{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:#24ad53;color:#fff;font-weight:900}.term-final-answer small{display:block;color:#398452;font-weight:750}.term-final-answer strong{display:block;font-size:22px;color:#12672d;margin-top:2px}.term-solver-cta{margin-top:4px}.term-table-wrap{overflow:auto;border:1px solid #dce6f0;border-radius:10px;margin-top:15px}.term-comparison-table{width:100%;border-collapse:collapse;min-width:560px}.term-comparison-table th,.term-comparison-table td{padding:12px 14px;border-bottom:1px solid #e5edf5;text-align:left;vertical-align:top}.term-comparison-table th{background:#eef6ff;color:#143b68;font-size:13px}.term-comparison-table tr:last-child td{border-bottom:0}.related-term-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:15px}.related-term-grid a{position:relative;border:1px solid #dfe8f1;border-radius:10px;padding:14px 38px 14px 14px;transition:.2s}.related-term-grid a:hover{border-color:#a9cff9;box-shadow:0 7px 18px rgba(28,87,146,.08);transform:translateY(-2px)}.related-term-grid strong{display:block;color:#173b65}.related-term-grid span{display:block;color:#6d7c8f;font-size:12px;margin-top:4px}.related-term-grid em{position:absolute;right:13px;top:16px;color:var(--blue);font-style:normal;font-size:20px}.term-faq-list{margin-top:15px;border-top:1px solid #e5edf5}.term-faq-list details{border-bottom:1px solid #e5edf5;padding:3px 0}.term-faq-list summary{cursor:pointer;padding:14px 34px 14px 0;font-weight:750;position:relative}.term-faq-list summary:after{content:"+";position:absolute;right:4px;top:12px;font-size:22px;color:var(--blue)}.term-faq-list details[open] summary:after{content:"−"}.term-faq-list p{color:#566980;margin:0 0 16px}.term-side-nav{position:sticky;top:96px;display:grid;gap:14px}.term-side-card{background:#fff;border:1px solid #e0e9f3;border-radius:12px;padding:16px}.term-side-card>strong{display:block;margin-bottom:8px}.term-side-card>a:not(.primary-button){display:block;padding:8px 0;border-bottom:1px solid #eff3f7;color:#5b6d82;font-size:13px}.term-side-card>a:not(.primary-button):hover{color:var(--blue)}.solver-promo-card{background:linear-gradient(145deg,#0a2a4e,#0d427a);color:#fff}.solver-promo-card>span{display:grid;place-items:center;width:43px;height:43px;border-radius:10px;background:#1c78e4;font-family:Cambria,"Times New Roman",serif;font-size:24px;margin-bottom:11px}.solver-promo-card p{color:#cee2f5;font-size:12px}.solver-promo-card .primary-button{margin-top:4px;padding:10px 14px;font-size:13px}.term-side-card .primary-button{color:#fff}
@media(max-width:900px){.term-hero-grid{grid-template-columns:1fr}.term-content-shell{grid-template-columns:1fr}.term-side-nav{position:static;grid-template-columns:1fr 1fr}.term-hero-section h1{font-size:41px}}
@media(max-width:620px){.term-hero-section{padding:27px 0}.term-hero-section h1{font-size:34px}.term-lead{font-size:17px}.term-hero-actions{align-items:flex-start;flex-direction:column;gap:10px}.term-section-card{padding:20px}.term-section-card h2{font-size:24px}.term-example-grid,.related-term-grid{grid-template-columns:1fr}.term-side-nav{grid-template-columns:1fr}.term-formula-box div{font-size:20px}}

/* MathCube v1.3 CSE learning library */
.term-cse-card{border-color:#cfe2fb;background:linear-gradient(145deg,#fff,#f6fbff)}
.term-cse-use{display:grid;grid-template-columns:48px 1fr;gap:14px;align-items:start;margin-top:16px;padding:18px;border-radius:12px;background:#eef7ff;border:1px solid #cfe4fb}
.term-cse-use>span{width:44px;height:44px;display:grid;place-items:center;border-radius:10px;background:#1471e8;color:#fff;font-size:22px;font-weight:800}
.term-cse-use p{margin:2px 0 0;color:#34516f;font-size:16px;line-height:1.65}
.term-subject-filters{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 18px}
.term-subject-filters a{display:inline-flex;align-items:center;gap:6px;padding:7px 11px;border:1px solid #d7e5f3;border-radius:999px;background:#fff;color:#3e5875;font-size:12px;font-weight:700}
.term-subject-filters a:hover{border-color:#9dc9fb;color:var(--blue);background:#f4f9ff}
.term-subject-filters small{display:inline-grid;place-items:center;min-width:20px;height:20px;padding:0 5px;border-radius:999px;background:#e8f3ff;color:#176ccc;font-size:10px}
.term-card-subject{display:inline-block;margin-bottom:8px;padding:4px 8px;border-radius:999px;background:#eef6ff;color:#176ccc;font-weight:800;font-size:10px}