*{box-sizing:border-box}html{background:#f7fbff;color:#12323d;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;scroll-behavior:smooth}body{margin:0}a{color:inherit;text-decoration:none}button,input,select{font:inherit}.site-shell{overflow:hidden}.topbar,.footer{align-items:center;display:flex;gap:24px;justify-content:space-between;margin:0 auto;max-width:1180px;padding:22px 24px;width:100%}.topbar{min-height:76px}.brand{align-items:center;display:inline-flex;font-size:1.08rem;font-weight:800;gap:10px}.brand-mark{align-items:center;background:#176b87;border-radius:8px;color:#fff;display:inline-flex;height:36px;justify-content:center;width:36px}nav{align-items:center;display:flex;flex-wrap:wrap;gap:8px 18px}nav a{color:#385864;font-size:.96rem;font-weight:650}.hero{align-items:center;background:radial-gradient(circle at 78% 18%,rgba(248,214,109,.36),transparent 23%),radial-gradient(circle at 18% 86%,rgba(31,138,112,.24),transparent 26%),linear-gradient(135deg,#f4fbff,#e8f6fb 46%,#fff7dc);display:grid;isolation:isolate;margin:0 auto;max-width:none;min-height:calc(100vh - 76px);overflow:hidden;padding:clamp(28px,5vw,72px) 24px clamp(38px,6vw,82px);position:relative}.hero-copy{margin:0 auto;max-width:1280px;min-width:0;position:relative;width:100%;z-index:2}.hero-copy:before{background:linear-gradient(90deg,#f7fbfff5,#f7fbffb8,#f7fbff00);content:"";inset:-34px auto -34px -24px;pointer-events:none;position:absolute;width:min(820px,78vw);z-index:-1}.eyebrow,.kicker{color:#176b87;font-size:.78rem;font-weight:800;letter-spacing:0;margin:0 0 10px;text-transform:uppercase}h1,h2,h3,p{margin-top:0}h1{color:#0f2e38;font-size:clamp(4.2rem,11vw,9.4rem);line-height:.86;margin-bottom:20px}.hero-lede{color:#234b59;font-size:clamp(1.18rem,2vw,1.55rem);line-height:1.5;max-width:720px}.search-panel{backdrop-filter:blur(14px);background:#ffffffd1;border:1px solid rgba(197,224,233,.92);border-radius:8px;box-shadow:0 22px 54px #1c546624;margin:28px 0 18px;padding:14px;width:min(100%,640px)}.search-panel label{color:#46636e;display:block;font-size:.84rem;font-weight:750;margin-bottom:9px}.search-row{display:grid;gap:10px;grid-template-columns:1fr auto}.search-row input{border:1px solid #cbdde5;border-radius:6px;color:#15343f;min-height:48px;min-width:0;padding:0 14px}.search-row button,.hero-actions a,.lab-link{align-items:center;background:#176b87;border:0;border-radius:6px;color:#fff;cursor:pointer;display:inline-flex;font-weight:800;justify-content:center;min-height:48px;padding:0 18px}.hero-actions{display:flex;flex-wrap:wrap;gap:10px}.hero-actions a:last-child{background:#f8d66d;color:#173540}.hero-topic-strip{display:flex;flex-wrap:wrap;gap:9px;margin-top:18px;max-width:720px}.hero-topic-strip a{background:#ffffffb8;border:1px solid rgba(199,224,232,.92);border-radius:999px;color:#176b87;font-size:.84rem;font-weight:850;padding:8px 12px}.hero-promises{display:flex;flex-wrap:wrap;gap:9px;margin:4px 0 18px;max-width:720px}.hero-promises span{align-items:center;background:#0f2e38e0;border:1px solid rgba(255,255,255,.36);border-radius:999px;color:#fff;display:inline-flex;font-size:.78rem;font-weight:900;min-height:34px;padding:7px 12px}.hero-lab{inset:0;overflow:hidden;position:absolute;z-index:1}.lab-header{align-items:center;backdrop-filter:blur(14px);background:#ffffffb8;border:1px solid rgba(193,220,230,.92);border-radius:8px;bottom:clamp(104px,12vw,150px);box-shadow:0 18px 44px #144a5e21;display:flex;gap:16px;justify-content:space-between;padding:16px;position:absolute;right:clamp(22px,5vw,76px);width:min(430px,calc(100% - 44px))}.lab-header h2{font-size:clamp(1.25rem,2.4vw,1.8rem);line-height:1.15;margin:0}.kicker{margin-bottom:4px}.lab-link{background:#ebf6f9;color:#176b87;flex:0 0 auto;min-height:40px}canvas{display:block;height:100%;max-height:none;object-fit:cover;opacity:.88;width:100%}.controls{backdrop-filter:blur(14px);background:#ffffffb8;border:1px solid rgba(193,220,230,.92);border-radius:8px;bottom:28px;display:grid;gap:12px;grid-template-columns:repeat(2,minmax(0,1fr));padding:14px;position:absolute;right:clamp(22px,5vw,76px);width:min(430px,calc(100% - 44px))}.controls label{color:#405e69;display:grid;font-size:.84rem;font-weight:800;gap:8px}.controls input{accent-color:#176b87;width:100%}.formula-stats{backdrop-filter:blur(14px);background:#ffffffc2;border:1px solid rgba(193,220,230,.92);border-radius:8px;bottom:28px;box-shadow:0 18px 44px #144a5e1f;display:grid;grid-template-columns:repeat(3,1fr);left:clamp(22px,5vw,76px);margin:0;max-width:620px;position:absolute;right:auto;width:min(540px,42vw)}.formula-stats div{padding:14px 18px}.formula-stats div+div{border-left:1px solid #dfedf2}.formula-stats dt{color:#65808b;font-size:.76rem;font-weight:800;margin-bottom:4px;text-transform:uppercase}.formula-stats dd{font-size:1rem;font-weight:850;margin:0}.hero-lab .formula-stats{display:none}.trust-band,.section-grid,.featured-section,.method-section,.difference-section,.faq-section{margin:0 auto;max-width:1180px;padding:56px 24px}.trust-band{border-bottom:1px solid #dceaf0;border-top:1px solid #dceaf0;display:grid;gap:12px;grid-template-columns:repeat(4,minmax(0,1fr))}.trust-band div{background:radial-gradient(circle at 88% 18%,rgba(248,214,109,.2),transparent 30%),linear-gradient(135deg,#fffffffa,#eef8fcf5),#fff;border:1px solid #d8e7ed;border-radius:8px;box-shadow:0 10px 26px #154e6212;min-height:120px;padding:20px;transition:border-color .16s ease,box-shadow .16s ease,transform .16s ease}.trust-band div:hover{border-color:#b8dce8;box-shadow:0 16px 34px #154e621f;transform:translateY(-2px)}.trust-band strong,.trust-band span{display:block}.trust-band strong{color:#14333e;font-size:1.1rem;margin-bottom:8px}.trust-band span{color:#536f7a;line-height:1.45}.section-grid,.method-section,.difference-section{display:grid;gap:36px;grid-template-columns:minmax(250px,.7fr) minmax(0,1.3fr)}.section-heading h2,.method-section h2,.difference-section h2{color:#0f2e38;font-size:clamp(2rem,4.6vw,3.35rem);line-height:1.05;margin-bottom:18px}.section-heading p,.difference-copy p,.method-section p{color:#4b6873;font-size:1.08rem;line-height:1.65}.compact{max-width:780px}.subject-grid{display:grid;gap:16px;grid-template-columns:repeat(4,minmax(0,1fr))}.subject-card,.featured-list article,.method-list li{background:#fff;border:1px solid #d8e7ed;border-radius:8px;box-shadow:0 10px 28px #154e6214}.subject-card,.featured-list article a,.method-list li{transition:border-color .16s ease,box-shadow .16s ease,transform .16s ease}.subject-card:hover,.featured-list article a:hover,.method-list li:hover{border-color:#b8dce8;box-shadow:0 18px 38px #154e6221;transform:translateY(-2px)}.subject-card{background:radial-gradient(circle at 88% 12%,rgba(248,214,109,.28),transparent 28%),linear-gradient(180deg,#fff,#f8fcff);display:flex;flex-direction:column;min-height:300px;overflow:hidden;padding:20px;position:relative}.subject-card:after{background:linear-gradient(180deg,#176b87,#1f72d8);border-radius:999px;content:"";height:58px;opacity:.12;position:absolute;right:-16px;top:-18px;width:58px}.subject-card small{align-items:center;background:#ebf6f9;border:1px solid #cfe3eb;border-radius:999px;color:#176b87;display:inline-flex;font-size:.72rem;font-weight:900;height:30px;justify-content:center;margin-bottom:16px;width:42px}.subject-card span,.featured-list span{color:#176b87;font-size:.84rem;font-weight:850;text-transform:uppercase}.subject-card strong{color:#12323d;display:block;font-size:1.34rem;line-height:1.15;margin:12px 0 10px}.subject-card p{color:#536f7a;line-height:1.5}.subject-card ul{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:auto 0 0;padding:0}.subject-card li,.difference-checks span{background:#eef8f2;border:1px solid #d3eadc;border-radius:999px;color:#235d41;font-size:.84rem;font-weight:750;padding:7px 10px}.featured-list{display:grid;gap:14px;grid-template-columns:repeat(3,minmax(0,1fr))}.featured-list article a{background:linear-gradient(180deg,#fffffffa,#f7fbfffa),#fff;display:block;min-height:210px;padding:20px}.featured-list h3{color:#12323d;font-size:1.34rem;line-height:1.2;margin:18px 0 10px}.featured-list p{color:#536f7a;line-height:1.55}.method-list{counter-reset:step;display:grid;gap:14px;list-style:none;margin:0;padding:0}.method-list li{background:linear-gradient(135deg,#fff,#f7fbff),#fff;counter-increment:step;display:grid;gap:8px;grid-template-columns:56px 1fr;padding:18px}.method-list li:before{align-items:center;background:#f8d66d;border-radius:8px;color:#173540;content:counter(step);display:flex;font-size:1.2rem;font-weight:900;grid-row:1 / 3;height:48px;justify-content:center;width:48px}.method-list strong{color:#12323d;font-size:1.05rem;grid-column:2}.method-list span{color:#536f7a;grid-column:2;line-height:1.5}.difference-section{align-items:center;background:radial-gradient(circle at 88% 16%,rgba(248,214,109,.34),transparent 25%),radial-gradient(circle at 10% 94%,rgba(142,217,195,.26),transparent 28%),linear-gradient(135deg,#0d2b35,#176b87 62%,#1f8a70);border-radius:8px;color:#fff;margin-bottom:56px;overflow:hidden;position:relative}.difference-section:after{border:1px solid rgba(255,255,255,.16);border-radius:50%;content:"";height:320px;position:absolute;right:-120px;top:-130px;width:320px}.difference-section .eyebrow,.difference-section h2,.difference-section p{color:#fff}.difference-section p{opacity:.82}.difference-checks{display:flex;flex-wrap:wrap;gap:10px}.difference-copy,.difference-checks{position:relative;z-index:1}.difference-checks span{backdrop-filter:blur(10px);background:#ffffff21;border-color:#ffffff38;color:#fff}.faq-list{display:grid;gap:10px}details{background:#fff;border:1px solid #d8e7ed;border-radius:8px;padding:18px 20px}summary{color:#12323d;cursor:pointer;font-weight:850}details p{color:#536f7a;line-height:1.6;margin:12px 0 0}.footer{border-top:1px solid #dceaf0;color:#45636e;display:flex;flex-wrap:wrap;font-size:.9rem;gap:12px 18px;justify-content:space-between;margin:0 auto;max-width:1440px;padding:18px 28px}.footer p{font-weight:800;margin:0}.footer nav{display:flex;flex-wrap:wrap;gap:10px 16px}.footer a{color:#176b87;font-weight:850}.library-hero,.chapter-directory,.full-directory,.topic-shell,.breadcrumbs{margin:0 auto;max-width:1180px;padding-left:24px;padding-right:24px}.library-hero{background:radial-gradient(circle at 82% 18%,rgba(248,214,109,.26),transparent 28%),linear-gradient(180deg,#ebf6f9c2,#f7fbff00);border-bottom:1px solid rgba(216,231,237,.74);max-width:none;padding-bottom:56px;padding-top:54px}.library-hero h1,.topic-hero h1{font-size:clamp(3.8rem,10vw,7.4rem);margin-bottom:22px}.library-hero p,.topic-hero p{color:#45636e;font-size:clamp(1.08rem,2vw,1.35rem);line-height:1.6;max-width:820px}.library-hero>*{margin-left:auto;margin-right:auto;max-width:1280px}.topic-count{color:#176b87;font-weight:850}.chapter-directory,.full-directory,.topic-shell{padding-bottom:56px;padding-top:44px}.chapter-card-grid{display:grid;gap:18px;grid-template-columns:repeat(3,minmax(0,1fr))}.chapter-card,.directory-chapter,.directory-section,.topic-placeholder{background:#fff;border:1px solid #d8e7ed;border-radius:8px;box-shadow:0 10px 28px #154e6214}.chapter-card{display:flex;flex-direction:column;isolation:isolate;min-height:330px;overflow:hidden;padding:22px;position:relative;transition:border-color .16s ease,box-shadow .16s ease,transform .16s ease}.chapter-card:before{background:var(--card-soft, #eef8f2);border-radius:50%;content:"";height:170px;opacity:.7;position:absolute;right:-62px;top:-74px;width:170px;z-index:-1}.chapter-card:hover{border-color:var(--card-border, #bfdde7);box-shadow:0 16px 34px #154e621f;transform:translateY(-2px)}.chapter-card-top{align-items:center;display:flex;gap:12px;justify-content:space-between;margin-bottom:18px}.chapter-icon{align-items:center;background:var(--card-soft, #eef8f2);border:1px solid var(--card-border, #d3eadc);border-radius:8px;color:var(--card-ink, #176b87);display:inline-flex;height:54px;justify-content:center;width:54px}.chapter-icon svg{fill:none;height:30px;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:1.8;width:30px}.chapter-count,.directory-chapter header span{color:#176b87;font-size:.78rem;font-weight:850;text-transform:uppercase}.chapter-count{background:#ffffffb8;border:1px solid var(--card-border, #d3eadc);border-radius:999px;color:var(--card-ink, #176b87);padding:7px 10px;white-space:nowrap}.chapter-card h3,.directory-chapter h3,.directory-section h3,.directory-section h4,.topic-placeholder h2{color:#12323d;line-height:1.16;margin-bottom:12px;margin-top:0}.chapter-card h3{font-size:1.5rem;margin-top:0}.chapter-card p{color:#536f7a;line-height:1.55}.chapter-card ul{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:auto 0 0;padding:0}.chapter-card li{background:#ffffffc2;border:1px solid var(--card-border, #d3eadc);border-radius:999px;color:var(--card-ink, #235d41);font-size:.78rem;font-weight:750;padding:7px 10px}.chapter-card-mint{--card-soft: #e8f8ef;--card-border: #c6ead3;--card-ink: #20724b}.chapter-card-sky{--card-soft: #e8f5ff;--card-border: #c7e5f7;--card-ink: #176b87}.chapter-card-sun{--card-soft: #fff6d7;--card-border: #f0dea1;--card-ink: #8a6816}.chapter-card-rose{--card-soft: #fff0f0;--card-border: #f3cece;--card-ink: #a54a4a}.chapter-card-violet{--card-soft: #f2f0ff;--card-border: #d9d2f4;--card-ink: #6252a4}.chapter-card-leaf{--card-soft: #eef9df;--card-border: #d6eab6;--card-ink: #58751f}.chapter-card-aqua{--card-soft: #e4fbf6;--card-border: #bfebe1;--card-ink: #21766b}.chapter-card-peach{--card-soft: #fff1e5;--card-border: #f0d2b7;--card-ink: #9a5f29}.chapter-card-lime{--card-soft: #f2f8d7;--card-border: #dce9a5;--card-ink: #66771d}.chapter-card-blue{--card-soft: #eaf2ff;--card-border: #cadcf5;--card-ink: #386aa3}.directory-stack{display:grid;gap:22px}.directory-chapter{padding:22px}.directory-chapter header{align-items:center;border-bottom:1px solid #e2edf2;display:flex;gap:18px;justify-content:space-between;margin-bottom:18px;padding-bottom:16px}.directory-chapter header>a{background:#f8d66d;border-radius:6px;color:#173540;flex:0 0 auto;font-weight:850;min-height:40px;padding:10px 14px}.directory-chapter h3{font-size:1.7rem;margin-bottom:0;margin-top:6px}.directory-sections{display:grid;gap:16px;grid-template-columns:repeat(2,minmax(0,1fr))}.chapter-topic-page .directory-sections{grid-template-columns:repeat(3,minmax(0,1fr))}.directory-section{background:#fbfeff;padding:18px}.directory-section h3,.directory-section h4{font-size:1.15rem}.directory-section ul{display:grid;gap:8px;list-style:none;margin:0;padding:0}.directory-section a{color:#315561;display:inline-flex;font-weight:700;line-height:1.35;padding:1px 0}.directory-section a:hover{color:#176b87}.breadcrumbs{align-items:center;color:#5f7882;display:flex;flex-wrap:wrap;font-size:.84rem;font-weight:750;gap:8px;padding-top:16px}.breadcrumbs a{color:#176b87}.topic-page-shell{display:grid;grid-template-columns:312px minmax(0,1fr);margin:0 auto;max-width:1440px;min-height:100vh;width:100%}.topic-page-shell:has(.topic-sidebar-panel:not([open])){grid-template-columns:64px minmax(0,1fr)}.topic-sidebar{background:#fff;border-right:1px solid #d8e7ed;height:100vh;min-height:100vh;position:sticky;top:0}.topic-sidebar-panel{background:transparent;border:0;border-radius:0;height:100vh;overflow:hidden;padding:0}.topic-sidebar-panel[open]{display:flex;flex-direction:column}.topic-sidebar-panel>summary,.topic-mobile-nav>summary{align-items:center;color:#12323d;display:flex;font-size:.9rem;font-weight:850;justify-content:space-between;min-height:48px}.topic-sidebar-panel>summary{border-bottom:1px solid #e1edf2;flex:0 0 auto;gap:14px;min-height:88px;padding:12px 16px}.topic-sidebar-panel>summary::-webkit-details-marker,.topic-mobile-nav>summary::-webkit-details-marker{display:none}.sidebar-summary-brand{align-items:center;display:inline-flex;gap:14px;min-width:0}.sidebar-logo-mark{align-items:center;background:#176b87;border-radius:8px;color:#fff;display:inline-flex;flex:0 0 auto;font-size:1.25rem;font-weight:950;height:52px;justify-content:center;width:52px}.sidebar-summary-title{color:#12323d;font-size:1.9rem;font-weight:900;line-height:1;padding:8px 0}.sidebar-collapse-icon{align-items:center;background:#eef8f2;border:1px solid #d3eadc;border-radius:6px;color:#176b87;display:inline-flex;flex:0 0 auto;height:30px;justify-content:center;width:30px}.sidebar-collapse-icon:before{content:"<";font-size:1rem;font-weight:900}.topic-sidebar-panel:not([open])>summary{align-items:center;flex-direction:column;gap:8px;justify-content:flex-start;min-height:100vh;padding-top:12px}.topic-sidebar-panel:not([open]) .sidebar-summary-title{display:none}.topic-sidebar-panel:not([open]) .sidebar-collapse-icon:before{content:">"}.topic-sidebar-inner{display:flex;flex:1 1 auto;flex-direction:column;height:calc(100vh - 88px);min-height:0;overflow:hidden;padding:16px 12px 0}.topic-sidebar-brand{background:#f7fbff;border:1px solid #e0edf2;border-radius:8px;color:#315561;flex:0 0 auto;font-size:.88rem;font-weight:900;line-height:1.3;margin-bottom:12px;padding:11px 12px}.topic-sidebar-search{flex:0 0 auto;margin-bottom:12px}.topic-sidebar-search label{color:#405e69;display:block;font-size:.78rem;font-weight:850;margin-bottom:8px}.topic-sidebar-search input{background:#f8fcfd;border:1px solid #cbdde5;border-radius:6px;color:#15343f;min-height:42px;padding:0 12px;width:100%}.topic-tree{align-items:stretch;display:block;flex:1 1 auto;min-height:0;overflow:auto;padding:0 4px 18px 0;scrollbar-color:#c6dce6 transparent;scrollbar-width:thin}.topic-tree::-webkit-scrollbar{width:8px}.topic-tree::-webkit-scrollbar-thumb{background:#c6dce6;border-radius:999px}.topic-tree::-webkit-scrollbar-track{background:transparent}.topic-tree details{background:transparent;border:0;border-radius:0;padding:0}.topic-tree summary{border-radius:6px;color:#274a56;font-size:.9rem;font-weight:850;line-height:1.25;list-style-position:inside;padding:9px 8px}.topic-tree-section summary{color:#176b87;font-size:.84rem;padding-left:18px}.topic-tree ul{display:grid;gap:3px;list-style:none;margin:0 0 5px;padding:0 0 0 18px}.topic-tree-link{border-radius:6px;color:#405e69;display:block;font-size:.84rem;font-weight:700;line-height:1.25;padding:7px 9px}.topic-tree-link:hover{background:#eef8f2;color:#176b87}.topic-tree-link.is-current{background:#176b87;color:#fff}.topic-mobile-nav{display:none}.topic-main{min-width:0;padding:0 28px 56px}.topic-topline{align-items:center;display:flex;gap:12px;justify-content:space-between}.topic-main .breadcrumbs{justify-content:flex-start;margin-left:0;margin-right:0;font-size:.7rem;flex:1 1 auto;gap:5px;max-width:none;padding-left:0;padding-right:0;padding-top:12px}.topic-quick-links{display:flex;flex:0 0 auto;flex-wrap:wrap;gap:7px;justify-content:flex-end;padding-top:12px}.topic-quick-links a{background:#fff;border:1px solid #d8e7ed;border-radius:6px;color:#176b87;font-size:.72rem;font-weight:850;min-height:28px;padding:6px 9px}.topic-quick-links a:hover{background:#eef8f2;border-color:#c6e2cf}.topic-main .topic-hero{max-width:none;padding:10px 0}.topic-main .topic-hero .eyebrow{font-size:.65rem;margin-bottom:5px}.topic-main .topic-hero h1{font-size:clamp(1.36rem,2vw,1.82rem);line-height:1;margin-bottom:7px}.topic-main .topic-hero p{font-size:clamp(.84rem,.95vw,.92rem);line-height:1.5;max-width:700px}.coming-soon-badge{align-items:center;background:#fff7ed;border:1px solid #fed7aa;border-radius:999px;color:#9a3412;display:inline-flex;font-size:.72rem;font-weight:900;letter-spacing:.04em;line-height:1;margin-top:9px;min-height:28px;padding:0 10px;text-transform:uppercase;width:fit-content}.topic-title-row{align-items:center;display:flex;gap:18px;justify-content:space-between;width:100%}.topic-share-button{align-items:center;background:#fff;border:1px solid #d8e7ed;border-radius:8px;box-shadow:0 8px 18px #154e6214;color:#176b87;cursor:pointer;display:inline-flex;flex:0 0 auto;font-size:.82rem;font-weight:900;gap:8px;margin-left:auto;min-height:38px;padding:0 13px}.topic-share-button:hover{background:#eef8f2;border-color:#c6e2cf}.topic-share-button svg{fill:none;height:19px;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:2;width:19px}.ad-slot{min-height:0}.simulator-card{background:#fff;border:1px solid #d8e7ed;border-radius:8px;box-shadow:0 14px 34px #154e6217;display:grid;gap:0;grid-template-columns:minmax(0,1fr) 290px;overflow:hidden;position:relative}.coming-soon-watermark{color:#176b87;font-size:clamp(3.2rem,8vw,7rem);font-weight:950;left:50%;letter-spacing:.02em;line-height:1;opacity:.07;pointer-events:none;position:absolute;text-transform:uppercase;top:50%;transform:translate(-50%,-50%) rotate(-12deg);user-select:none;white-space:nowrap;z-index:3}.simulator-workspace,.simulator-panel{position:relative;z-index:1}.distance-simulator-section,.speed-simulator-section{margin-left:-28px;margin-right:-28px}.simulator-workspace{min-width:0;padding:0}.simulator-toolbar{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:9px;padding:10px 10px 0}.simulator-toolbar button{background:#f4f9fb;border:1px solid #d8e7ed;border-radius:6px;color:#315561;cursor:pointer;font-size:.82rem;font-weight:850;min-height:32px;padding:0 10px}.simulator-toolbar button.is-active{background:#176b87;border-color:#176b87;color:#fff}.simulator-expand-button{align-items:center;display:inline-flex;justify-content:center;margin-left:auto;padding:0;width:34px}.simulator-expand-button svg{fill:none;height:18px;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:1.8;width:18px}.simulator-stage{background:#f8fcfd;border:1px solid #d8e7ed;border-radius:8px;min-height:300px;overflow:hidden}.simulator-stage svg{display:block;height:auto;min-height:300px;width:100%}.simulator-stage text{fill:#12323d;font-size:20px;font-weight:850}.simulator-panel{background:#fbfeff;border-left:1px solid #d8e7ed;display:grid;gap:13px;padding:18px}.simulator-panel h2,.topic-card h2{color:#12323d;font-size:1.1rem;line-height:1.2;margin-bottom:0}.simulator-panel label{color:#405e69;display:grid;font-size:.84rem;font-weight:850;gap:7px}.simulator-panel input,.simulator-panel select{background:#fff;border:1px solid #cbdde5;border-radius:6px;color:#15343f;min-height:40px;padding:0 10px;width:100%}.simulator-panel input[type=range]{accent-color:#176b87;padding:0}.simulator-panel button{background:#176b87;border:0;border-radius:6px;color:#fff;cursor:pointer;font-weight:850;min-height:44px}body.simulator-fullscreen-open{overflow:hidden}.simulator-card.is-fullscreen{grid-template-columns:minmax(0,1fr) 320px;inset:16px;position:fixed;z-index:1000}.simulator-card.is-fullscreen .simulator-stage,.simulator-card.is-fullscreen .simulator-stage svg{min-height:calc(100vh - 126px)}.simulator-card.is-fullscreen .speed-stage,.simulator-card.is-fullscreen .speed-stage svg{min-height:calc(100vh - 210px)}html body :is([data-gravity-simulator],[data-gravity-accel-simulator],[data-free-fall-simulator],[data-weight-simulator],[data-mass-weight-simulator],[data-universal-gravitation-simulator],[data-gravitational-field-strength-simulator],[data-gravitational-potential-energy-simulator],[data-gravitational-potential-simulator],[data-escape-velocity-simulator],[data-orbital-velocity-simulator],[data-satellite-motion-simulator],[data-keplers-first-law-simulator],[data-keplers-second-law-simulator],[data-keplers-third-law-simulator],[data-sat-simulator-root],[data-work-simulator-root],[data-wfs-simulator-root]) .simulator-card.is-fullscreen{background:#fff!important;border-radius:0!important;box-shadow:none!important;display:grid!important;grid-template-columns:minmax(0,1fr) minmax(270px,320px)!important;height:100vh!important;inset:0!important;margin:0!important;max-height:100vh!important;max-width:none!important;overflow:auto!important;padding:8px!important;position:fixed!important;width:100vw!important;z-index:10000!important}html body :is([data-gravity-simulator],[data-gravity-accel-simulator],[data-free-fall-simulator],[data-weight-simulator],[data-mass-weight-simulator],[data-universal-gravitation-simulator],[data-gravitational-field-strength-simulator],[data-gravitational-potential-energy-simulator],[data-gravitational-potential-simulator],[data-escape-velocity-simulator],[data-orbital-velocity-simulator],[data-satellite-motion-simulator],[data-keplers-first-law-simulator],[data-keplers-second-law-simulator],[data-keplers-third-law-simulator],[data-sat-simulator-root],[data-work-simulator-root],[data-wfs-simulator-root]) .simulator-card.is-fullscreen .simulator-workspace{display:grid!important;grid-template-rows:auto auto minmax(0,1fr) auto!important;height:100%!important;min-height:0!important}html body :is([data-gravity-simulator],[data-gravity-accel-simulator],[data-free-fall-simulator],[data-weight-simulator],[data-mass-weight-simulator],[data-universal-gravitation-simulator],[data-gravitational-field-strength-simulator],[data-gravitational-potential-energy-simulator],[data-gravitational-potential-simulator],[data-escape-velocity-simulator],[data-orbital-velocity-simulator],[data-satellite-motion-simulator],[data-keplers-first-law-simulator],[data-keplers-second-law-simulator],[data-keplers-third-law-simulator],[data-sat-simulator-root],[data-work-simulator-root],[data-wfs-simulator-root]) .simulator-card.is-fullscreen :is(.gravity-stage,.gravity-stage svg,.impulse-stage,.impulse-stage svg,.escape-stage,.escape-stage svg,.orbital-stage,.orbital-stage svg,.satellite-stage,.satellite-stage svg,.kepler-stage,.kepler-stage svg,.kepler3-stage,.kepler3-stage svg,.work-angle-stage,.work-angle-stage svg,.work-wfs-stage,.work-wfs-stage svg){aspect-ratio:auto!important;height:auto!important;min-height:calc(100vh - 190px)!important;width:100%!important}html body :is([data-gravity-simulator],[data-gravity-accel-simulator],[data-free-fall-simulator],[data-weight-simulator],[data-mass-weight-simulator],[data-universal-gravitation-simulator],[data-gravitational-field-strength-simulator],[data-gravitational-potential-energy-simulator],[data-gravitational-potential-simulator],[data-escape-velocity-simulator],[data-orbital-velocity-simulator],[data-satellite-motion-simulator],[data-keplers-first-law-simulator],[data-keplers-second-law-simulator],[data-keplers-third-law-simulator],[data-sat-simulator-root],[data-work-simulator-root],[data-wfs-simulator-root]) .simulator-card.is-fullscreen .simulator-panel{max-height:calc(100vh - 16px)!important;overflow:auto!important}.gravity-topic-main .topic-topline{margin-bottom:0!important}.gravity-topic-main .topic-hero{margin-bottom:0!important;padding:7px 0!important}.gravity-topic-main .topic-title-row{gap:10px!important}.gravity-topic-main .topic-hero .eyebrow{font-size:.62rem!important;line-height:1.05!important;margin:0!important;padding:7px 0!important}.gravity-topic-main .topic-hero h1{font-size:clamp(1.22rem,1.75vw,1.58rem)!important;line-height:1.04!important;margin:0!important;padding:7px 0!important}.gravity-topic-main .topic-hero p{font-size:clamp(.76rem,.82vw,.84rem)!important;line-height:1.25!important;margin:0!important;max-width:780px!important;padding:7px 0!important}.gravity-topic-main :is(.gravity-simulator-section,.impulse-simulator-section,.escape-simulator-section,.orbital-simulator-section,.satellite-simulator-section,.kepler-simulator-section,.kepler3-simulator-section){margin-left:-28px!important;margin-right:-28px!important;margin-top:0!important}.gravity-topic-main :is(.gravity-simulator-card,.impulse-simulator-card,.escape-simulator-card,.orbital-simulator-card,.satellite-simulator-card,.kepler-simulator-card,.kepler3-simulator-card){border-radius:0 8px 8px 0!important;border-left-width:0!important;border-right-width:0!important}.gravity-topic-main :is(.gravity-simulator-card,.impulse-simulator-card,.escape-simulator-card,.orbital-simulator-card,.satellite-simulator-card,.kepler-simulator-card,.kepler3-simulator-card) .simulator-toolbar{margin-bottom:0!important;padding:6px 6px 0!important}.gravity-topic-main :is(.escape-heading-row,.orbital-heading-row,.satellite-heading-row,.kepler-heading-row,.kepler3-heading-row){gap:6px!important;margin:0!important;padding:7px 8px!important}.gravity-topic-main :is(.simulator-heading){font-size:clamp(.9rem,1.1vw,1.06rem)!important;line-height:1.08!important;margin:0!important;padding:7px 6px!important}.gravity-topic-main :is(.simulator-note){font-size:.72rem!important;line-height:1.18!important;margin:0!important;padding:7px 6px!important}.gravity-topic-main :is(.lesson-section,.compact-lesson)>h2,.gravity-topic-main :is(.learning-card,.topic-card,.practice-card,.faq-section,.topic-related-section) h2{padding-bottom:7px!important;padding-top:7px!important}.gravity-topic-main :is(.lesson-section,.compact-lesson)>p,.gravity-topic-main :is(.learning-card,.topic-card,.practice-card)>p,.gravity-topic-main :is(.faq-section,.topic-related-section)>p{padding-bottom:7px!important;padding-top:7px!important}.gravity-topic-main :is(.simulator-panel,.speed-control-panel) button,.gravity-topic-main .control-grid-2 button,.gravity-topic-main .simulator-toolbar button,.gravity-topic-main .velocity-tabs button{align-items:center!important;border-radius:8px!important;cursor:pointer!important;display:inline-flex!important;font-weight:850!important;justify-content:center!important;min-height:32px!important;transition:background .18s ease,border-color .18s ease,box-shadow .18s ease,color .18s ease,transform .18s ease!important}.gravity-topic-main :is(.simulator-panel,.speed-control-panel) button:not(.reset-control):not(.pause-control):not(.play-control),.gravity-topic-main .control-grid-2 button:not(.reset-control):not(.pause-control):not(.play-control){background:linear-gradient(180deg,#f8fcff,#eef8f2)!important;border:1px solid #cfe0e7!important;color:#174b5d!important;box-shadow:0 6px 14px #154e6214!important}.gravity-topic-main :is(.simulator-panel,.speed-control-panel) button:hover,.gravity-topic-main .control-grid-2 button:hover,.gravity-topic-main .simulator-toolbar button:hover,.gravity-topic-main .velocity-tabs button:hover{transform:translateY(-1px)!important}.gravity-topic-main :is(.simulator-panel,.speed-control-panel) button.reset-control,.gravity-topic-main .control-grid-2 button.reset-control{background:linear-gradient(180deg,#fff7ed,#fed7aa)!important;border:1px solid #fdba74!important;color:#9a3412!important;box-shadow:0 8px 18px #ea580c29!important}.gravity-topic-main :is(.simulator-panel,.speed-control-panel) button.reset-control:hover,.gravity-topic-main .control-grid-2 button.reset-control:hover{background:linear-gradient(180deg,#ffedd5,#fdba74)!important;border-color:#fb923c!important}.gravity-topic-main :is(.simulator-panel,.speed-control-panel) button.play-control,.gravity-topic-main .control-grid-2 button.play-control{background:linear-gradient(180deg,#dcfce7,#86efac)!important;border:1px solid #86efac!important;color:#166534!important;box-shadow:0 8px 18px #16a34a24!important}.gravity-topic-main :is(.simulator-panel,.speed-control-panel) button.pause-control,.gravity-topic-main .control-grid-2 button.pause-control{background:linear-gradient(180deg,#eff6ff,#bfdbfe)!important;border:1px solid #bfdbfe!important;color:#1d4ed8!important;box-shadow:0 8px 18px #2563eb24!important}.gravity-topic-main .simulator-expand-button{background:#fff!important;border:1px solid #cfe0e7!important;box-shadow:0 6px 16px #154e621a!important;color:#176b87!important;min-height:34px!important;width:34px!important}.topic-content-grid{display:grid;gap:14px;grid-template-columns:repeat(3,minmax(0,1fr));margin-top:16px}.topic-card{background:linear-gradient(180deg,#fff,#fbfdff);border:1px solid #d8e7ed;border-radius:8px;box-shadow:0 10px 24px #154e6214;margin-top:16px;min-height:178px;padding:15px}.topic-content-grid .topic-card{margin-top:0}.topic-card p{color:#45636e;font-size:.86rem;line-height:1.5;margin:9px 0 0}.topic-definition-card{position:relative}.definition-points{display:grid;gap:14px;margin-top:14px;padding-right:92px}.definition-points p{margin:0;padding-left:18px;position:relative}.definition-points p:before{background:#f28c28;border-radius:50%;content:"";height:9px;left:0;position:absolute;top:7px;width:9px}.definition-points p:nth-child(2):before{background:#1266d6}.definition-points strong,.solved-lines strong{color:#12323d;display:block;font-size:.88rem;margin-bottom:4px}.mini-path{bottom:18px;height:82px;position:absolute;right:16px;width:124px}.concept-table{border-collapse:collapse;color:#315561;font-size:.78rem;margin-top:14px;width:100%}.concept-table th,.concept-table td{border:1px solid #dceaf0;padding:8px;text-align:left;vertical-align:top}.concept-table th{background:#f0f6fb;color:#12323d;font-weight:900}.concept-table tr:nth-child(2n) td{background:#fbfdff}.topic-example-card{background:radial-gradient(circle at 86% 72%,rgba(248,214,109,.28),transparent 28%),linear-gradient(180deg,#fff,#fbfdff)}.solved-lines{background:#f8fcfd;border:1px solid #d8e7ed;border-radius:8px;display:grid;gap:7px;margin-top:14px;padding:12px}.solved-lines p{margin:0}.topic-card details{box-shadow:none;margin-top:8px;padding:10px 11px}.topic-card details p{font-size:.82rem}.topic-card summary{font-size:.84rem}.topic-card-kicker{color:#176b87;display:block;font-size:.68rem;font-weight:900;margin-bottom:6px;text-transform:uppercase}.topic-content-grid .topic-card:nth-child(1) h2{color:#1266d6}.topic-content-grid .topic-card:nth-child(2) h2{color:#15935f}.topic-content-grid .topic-card:nth-child(3) h2{color:#0b7c8e}.topic-shell{display:grid;gap:24px}.topic-hero{max-width:900px}.topic-placeholder{padding:22px}.topic-placeholder ul{color:#45636e;line-height:1.7;margin-bottom:0}.related-links{display:flex;flex-wrap:wrap;gap:10px}.related-links a{background:#eef8f2;border:1px solid #d3eadc;border-radius:999px;color:#235d41;font-weight:800;padding:8px 11px}.topic-faq-section,.topic-related-section{margin-top:100px}.topic-faq-section h2,.topic-related-section h2{color:#12323d;font-size:1.18rem;line-height:1.2;margin-bottom:12px}.related-topic-pills{display:flex;flex-wrap:wrap;gap:10px}.related-topic-pills a{align-items:center;background:linear-gradient(180deg,#f7fbff,#edf7fb);border:1px solid #cfe4ec;border-radius:8px;box-shadow:0 8px 18px #154e620f;color:#176b87;display:inline-flex;font-size:.82rem;font-weight:900;min-height:36px;padding:0 12px}.related-topic-pills a:hover{background:#eef8f2;border-color:#c6e2cf;color:#235d41}.topic-faq-list{display:grid;gap:8px}.topic-faq-list details{background:transparent;border:1px solid #d8e7ed;box-shadow:none;padding:13px 14px}.search-results-section{margin:0 auto;max-width:1180px;padding:48px 24px 64px}.search-summary{color:#536f7a;font-weight:750}.search-results{display:grid;gap:12px;grid-template-columns:repeat(3,minmax(0,1fr));margin-top:18px}.search-result-card{background:#fff;border:1px solid #d8e7ed;border-radius:8px;box-shadow:0 10px 28px #154e6214;display:block;min-height:150px;padding:18px}.search-result-card[hidden]{display:none}.search-result-card span{color:#176b87;font-size:.78rem;font-weight:850;text-transform:uppercase}.search-result-card h3{color:#12323d;font-size:1.18rem;line-height:1.2;margin:12px 0 8px}.search-result-card p{color:#536f7a;line-height:1.45;margin-bottom:0}.simple-page{margin:0 auto;max-width:920px;padding:0 24px 64px}.simple-page .breadcrumbs{padding-left:0;padding-right:0}.simple-page-hero{padding:46px 0 24px}.simple-page-hero h1{color:#12323d;font-size:clamp(2.4rem,7vw,4.8rem);line-height:.95;margin-bottom:18px}.simple-page-hero p,.simple-page-card p{color:#45636e;line-height:1.65}.simple-page-card{background:#fff;border:1px solid #d8e7ed;border-radius:8px;box-shadow:0 10px 28px #154e6214;padding:22px}.simple-page-card h2{color:#12323d;font-size:1.25rem;margin:18px 0 8px}.simple-page-card h2:first-child{margin-top:0}.simple-page-card a{color:#176b87;font-weight:850}.distance-topic-main{background:linear-gradient(180deg,#f8fcff,#fff 360px)}.speed-topic-main{background:linear-gradient(180deg,#f8fcff,#fff 330px)}.distance-hero{border-bottom:1px solid #e1edf2;margin-bottom:18px}.speed-hero{border-bottom:1px solid #e1edf2;margin-bottom:14px}.speed-topic-main .topic-hero h1{font-size:clamp(1.4rem,2vw,1.9rem)}.speed-topic-main .topic-hero p{max-width:760px}.section-heading{margin:22px 0 12px}.compact-heading{margin-top:18px}.section-heading h2,.lesson-section h2{color:#12323d;font-size:clamp(1.35rem,2vw,1.85rem);line-height:1.08;margin:5px 0 8px}.section-heading p,.lesson-section p{color:#45636e;line-height:1.6;margin:0;max-width:820px}.distance-simulator-card{grid-template-columns:minmax(0,1fr) 320px}.speed-simulator-card{grid-template-columns:minmax(0,1fr) 300px}.velocity-simulator-card,.acceleration-simulator-card{grid-template-columns:minmax(0,1fr) 310px}.average-speed-simulator-card{grid-template-columns:minmax(0,1fr) 300px}.average-velocity-simulator-card{grid-template-columns:minmax(0,1fr) 310px}.uniform-motion-simulator-card,.nonuniform-motion-simulator-card{grid-template-columns:minmax(0,1fr) 300px}.speed-simulator-card .simulator-workspace{padding:0}.speed-toolbar{justify-content:space-between}.speed-toolbar span{align-items:center;background:#edf7fb;border:1px solid #d8e7ed;border-radius:8px;color:#176b87;display:inline-flex;font-size:.82rem;font-weight:900;min-height:34px;padding:0 12px}.velocity-toolbar{align-items:center;gap:10px}.velocity-tabs{display:flex;flex-wrap:wrap;gap:8px}.velocity-tabs button{background:#f3f8ff;border:1px solid #cfe1f5;border-radius:8px;color:#12323d;cursor:pointer;font-size:.78rem;font-weight:900;min-height:34px;padding:0 12px}.velocity-tabs button.is-active{background:#1266d6;border-color:#1266d6;color:#fff}.simulator-heading{color:#12323d;font-size:1.04rem;margin:4px 0 10px;padding:0 10px}.simulator-note{padding:0 10px}.distance-stage{min-height:430px;position:relative}.distance-stage svg{min-height:430px}.speed-stage{background:#fbfeff;border:1px solid #d8e7ed;border-radius:8px;min-height:380px;overflow:hidden;position:relative}.speed-stage svg{display:block;min-height:380px;width:100%}.velocity-stage{background:#fbfeff;border:1px solid #d8e7ed;border-radius:8px;min-height:400px;overflow:hidden;position:relative}.velocity-stage svg{display:block;min-height:400px;width:100%}.acceleration-stage{background:#fbfeff}.distance-tabs button{min-height:36px}.live-result-panel,.formula-overlay,.speed-result-panel{background:#fffffff0;border:1px solid #d8e7ed;border-radius:8px;box-shadow:0 10px 26px #154e621a;position:absolute}.live-result-panel{left:16px;padding:12px;top:16px;width:min(255px,calc(100% - 32px))}.speed-result-panel{box-shadow:0 8px 18px #154e6212;margin:9px 10px 10px;padding:9px 10px;position:static;width:auto}.live-result-panel h3,.speed-result-panel h3{color:#12323d;font-size:.92rem;margin:0 0 8px}.live-result-panel dl,.speed-result-panel dl{display:grid;gap:5px;margin:0}.speed-result-panel dl{grid-template-columns:repeat(5,minmax(0,1fr))}.velocity-result-panel dl{grid-template-columns:repeat(3,minmax(0,1fr))}.live-result-panel div,.speed-result-panel div{display:flex;justify-content:space-between;gap:12px}.live-result-panel dt,.speed-result-panel dt{color:#536f7a;font-size:.75rem;font-weight:800}.live-result-panel dd,.speed-result-panel dd{color:#12323d;font-size:.75rem;font-weight:900;margin:0;text-align:right}.formula-overlay{bottom:16px;color:#315561;display:grid;font-size:.82rem;gap:4px;left:16px;max-width:calc(100% - 32px);padding:10px 12px}.formula-overlay strong{color:#1266d6}.distance-control-panel{align-content:start;max-height:none}.speed-control-panel{align-content:start;gap:9px;padding:12px}.velocity-control-panel,.acceleration-control-panel,.average-speed-control-panel,.average-velocity-control-panel,.uniform-motion-control-panel,.nonuniform-motion-control-panel{gap:8px}.speed-control-panel h3{color:#12323d;font-size:.92rem;margin:0}.distance-control-panel .control-grid-2,.speed-control-panel .control-grid-2{display:grid;gap:8px;grid-template-columns:repeat(2,minmax(0,1fr))}.distance-control-panel .control-grid-2 label,.speed-control-panel .control-grid-2 label{min-width:0}.distance-control-panel button.secondary-control,.speed-control-panel button.secondary-control{background:#eef8f2;border:1px solid #d3eadc;color:#235d41}.distance-control-panel button.pause-control,.speed-control-panel button.pause-control{background:#f28c28}.distance-control-panel button.reset-control,.speed-control-panel button.reset-control{background:#e63946}.speed-copy-link{min-height:34px;width:100%}.speed-control-panel label{font-size:.76rem;gap:5px}.speed-control-panel input,.speed-control-panel select{border-radius:6px;font-size:.84rem;min-height:34px;padding:0 9px}.speed-control-panel input[type=range]{min-height:18px}.speed-control-panel button{font-size:.78rem;min-height:34px}.velocity-step-controls,.velocity-straight-controls,.acceleration-car-controls,.acceleration-fall-controls,.average-trip-controls,.average-lap-controls,.average-velocity-hiker-controls,.average-velocity-elevator-controls{display:grid;gap:8px}.velocity-step-controls[hidden],.velocity-straight-controls[hidden],.acceleration-car-controls[hidden],.acceleration-fall-controls[hidden],.average-trip-controls[hidden],.average-lap-controls[hidden],.average-velocity-hiker-controls[hidden],.average-velocity-elevator-controls[hidden],.average-segment-row[hidden]{display:none}.average-segment-row{display:grid;gap:8px;grid-template-columns:repeat(2,minmax(0,1fr))}.toggle-list{display:grid;gap:7px}.toggle-list label{align-items:center;display:flex;flex-direction:row;font-size:.78rem;gap:8px}.toggle-list input{accent-color:#176b87;min-height:auto;width:auto}.svg-label{fill:#12323d;font-size:17px;font-weight:900}.svg-small-label{fill:#536f7a;font-size:12px;font-weight:800}.speed-svg-label{fill:#12323d;font-size:15px;font-weight:900}.speed-svg-small{fill:#536f7a;font-size:12px;font-weight:800}.speed-svg-tiny{fill:#6f8791;font-size:11px;font-weight:900}.speed-svg-title{fill:#12323d;font-size:13px;font-weight:950}.speed-svg-value{fill:#176b87;font-size:14px;font-weight:950}.speed-svg-timer{fill:#45636e;font-size:11px;font-weight:900}.speed-svg-center{text-anchor:middle}.velocity-svg-label{fill:#12323d;font-size:15px;font-weight:950}.velocity-svg-small{fill:#536f7a;font-size:12px;font-weight:850}.velocity-svg-blue{fill:#1266d6;font-size:14px;font-weight:950}.acceleration-gauge-value{fill:#1266d6;font-size:15px;font-weight:950}.velocity-svg-orange{fill:#d66f00;font-size:14px;font-weight:950}.acceleration-svg-note{fill:#315561;font-size:12px;font-weight:950}.acceleration-svg-blue{fill:#1266d6;font-size:13px;font-weight:950}.acceleration-svg-orange{fill:#d66f00;font-size:13px;font-weight:950}.simulator-note{color:#536f7a;font-size:.82rem;font-weight:800;margin:-4px 0 10px}.lesson-section{margin-top:34px}.compact-lesson{margin-top:28px}.learning-card-grid{display:grid;gap:16px;grid-template-columns:repeat(2,minmax(0,1fr));margin-top:24px}.learning-card,.solution-card,.practice-card,.summary-card{background:linear-gradient(180deg,#fff,#fbfdff);border:1px solid #d8e7ed;border-radius:8px;box-shadow:0 12px 28px #154e6214;padding:18px}.learning-card h2{color:#12323d;font-size:1.18rem;margin:0 0 12px}.learning-card h3{color:#12323d;font-size:.95rem;margin:10px 0 8px}.learning-card p,.learning-card li,.solution-card p,.solution-card li,.practice-card p,.summary-card li{color:#45636e;font-size:.9rem;line-height:1.55}.card-icon{align-items:center;border-radius:8px;display:inline-flex;font-size:.74rem;font-weight:950;height:28px;justify-content:center;margin-bottom:10px;text-transform:uppercase;width:34px}.blue-icon{background:#e9f2ff;color:#1266d6}.teal-icon{background:#e8f6f7;color:#0b7c8e}.green-icon{background:#eef8f2;color:#15935f}.purple-icon{background:#f4efff;color:#7b3fba}.orange-icon{background:#fff4e4;color:#d66f00}.definition-columns{display:grid;gap:14px;grid-template-columns:repeat(2,minmax(0,1fr))}.definition-columns ul,.mini-example-list,.check-list{display:grid;gap:8px;margin:0;padding-left:18px}.learning-visual,.park-map{display:block;height:auto;margin-top:12px;width:100%}.speed-mini-road{display:block;height:auto;margin-top:10px;width:100%}.speed-mini-road text{fill:#315561;font-size:15px;font-weight:900}.formula-boxes{display:grid;gap:9px}.formula-box{background:#f5fbfd;border:1px solid #d8e7ed;border-radius:8px;display:grid;gap:5px;padding:11px}.inline-formula{display:inline-block;padding:.02rem .24rem;border-radius:.35rem;background:#eff6ff;color:#1d4ed8;font-weight:750;white-space:nowrap}.formula-box strong{color:#176b87;font-size:.8rem}.formula-box code{color:#12323d;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-size:clamp(.78rem,1.2vw,.95rem);white-space:normal}.copy-formula-button{background:#176b87;border:0;border-radius:8px;color:#fff;cursor:pointer;font-weight:900;margin-top:12px;min-height:38px;padding:0 14px}.formula-card details{margin-top:12px}.note{background:#fff9ec;border:1px solid #f4ddb4;border-radius:8px;color:#734a00;padding:10px}.comparison-table{border-collapse:collapse;color:#315561;font-size:.82rem;width:100%}.comparison-table th,.comparison-table td{border:1px solid #dceaf0;padding:9px;text-align:left;vertical-align:top}.comparison-table th{background:#f0f6fb;color:#12323d}.solved-grid,.practice-grid{display:grid;gap:12px;grid-template-columns:repeat(3,minmax(0,1fr));margin-top:14px}.practice-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.solution-card summary,.practice-card summary{color:#12323d;font-weight:900}.distance-answer{color:#d66f00;font-weight:900}.displacement-answer{color:#1266d6;font-weight:900}.final-answer{color:#15935f;display:block;font-weight:900;margin-top:10px}.mini-solution-card{box-shadow:none;margin-top:9px;padding:12px}.speed-card-grid{gap:12px;margin-top:16px}.speed-card-grid .learning-card{padding:12px}.speed-card-grid .definition-card{background:linear-gradient(180deg,#f7fbff,#fff);border-color:#cfe1f5;border-top:4px solid #1266d6}.speed-card-grid .formula-card{background:linear-gradient(180deg,#f4fcfd,#fff);border-color:#c8e7ec;border-top:4px solid #0b7c8e}.speed-card-grid .example-card{background:linear-gradient(180deg,#f4fbf7,#fff);border-color:#cdebd8;border-top:4px solid #15935f}.speed-card-grid .solved-card{background:linear-gradient(180deg,#fbf7ff,#fff);border-color:#e2d4f7;border-top:4px solid #7b3fba}.velocity-card-grid .comparison-card,.acceleration-card-grid .acceleration-types-card,.speed-card-grid .mistakes-card{background:linear-gradient(180deg,#fff8ef,#fff);border-color:#f1d8b3;border-top:4px solid #f28c28}.speed-card-grid .speed-summary-card{background:linear-gradient(180deg,#f2fbf6,#fff);border-color:#cdebd8;border-top:4px solid #22a06b}.speed-control-panel{background:linear-gradient(180deg,#fbfeff,#f4fbfd);border-left-color:#cfe4ec}.speed-result-panel{background:linear-gradient(90deg,#f7fbff,#fff9f0);border-color:#d6e7ed}.speed-card-grid .learning-card h2{font-size:1rem;margin-bottom:8px}.speed-card-grid .learning-card p,.speed-card-grid .learning-card li,.speed-card-grid .solution-card p{font-size:.8rem;line-height:1.45}.learning-card.definition-card p,.learning-card.definition-card li,.speed-card-grid .definition-card p,.speed-card-grid .definition-card li{font-size:.94rem;line-height:1.58}.speed-card-grid .card-icon{height:24px;margin-bottom:7px;width:30px}.speed-card-grid .formula-box{gap:3px;padding:8px}.speed-card-grid .copy-formula-button{min-height:32px}.speed-secondary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.speed-practice-grid .practice-card{background:linear-gradient(180deg,#fff,#f8fcff);border-top:4px solid #1266d6;padding:13px}.speed-practice-grid .practice-card:nth-child(2n){background:linear-gradient(180deg,#fff,#f4fbf7);border-top-color:#15935f}.speed-practice-grid .practice-card:nth-child(3n){background:linear-gradient(180deg,#fff,#fff8ef);border-top-color:#f28c28}.speed-practice-grid .practice-card:nth-child(4n){background:linear-gradient(180deg,#fff,#fbf7ff);border-top-color:#7b3fba}.warning-list li::marker{color:#f28c28}.related-topic-strip a{background:#f3f8ff;border-color:#cfe1f5;color:#12323d;min-height:38px}.acceleration-result-panel dl,.average-speed-result-panel dl,.average-velocity-result-panel dl{grid-template-columns:repeat(3,minmax(0,1fr))}.uniform-motion-result-panel dl{grid-template-columns:repeat(4,minmax(0,1fr))}.nonuniform-motion-result-panel dl{grid-template-columns:repeat(3,minmax(0,1fr))}.average-speed-stage{background:#fbfeff}.average-velocity-stage{background:#fbfeff;min-height:430px}.average-velocity-stage svg{min-height:430px}.average-speed-card-grid .comparison-card,.average-velocity-card-grid .comparison-card,.uniform-motion-card-grid .graph-card,.nonuniform-motion-card-grid .comparison-card{background:linear-gradient(180deg,#fff8ef,#fff);border-color:#f1d8b3;border-top:4px solid #f28c28}.uniform-motion-stage{background:#fbfeff;min-height:420px}.uniform-motion-stage svg{min-height:420px}.nonuniform-motion-stage{background:#fbfeff;min-height:430px}.nonuniform-motion-stage svg{min-height:430px}.uniform-mini-road,.nonuniform-mini-road{background:#fbfeff;border-radius:8px}.distance-time-graph-simulator-card{grid-template-columns:minmax(0,1fr) 300px}.distance-time-graph-control-panel{gap:8px}.distance-time-graph-stage{background:#fbfeff;min-height:460px;overflow-x:auto}.distance-time-graph-stage svg{display:block;min-width:760px;min-height:460px}.second-equation-stage{overflow:hidden}.second-equation-stage svg{min-width:0;width:100%}.third-equation-stage{overflow:hidden}.third-equation-stage svg{min-width:0;width:100%}.relative-velocity-stage,.horizontal-projectile-stage,.vertical-projectile-stage,.max-height-stage,.time-of-flight-stage,.range-projectile-stage{overflow:hidden}.relative-velocity-stage svg,.horizontal-projectile-stage svg,.vertical-projectile-stage svg,.max-height-stage svg,.time-of-flight-stage svg,.range-projectile-stage svg{min-width:0;width:100%}.projectile-motion-stage{overflow:hidden}.projectile-motion-stage svg{min-width:0;width:100%}.simulator-panel [hidden],.speed-control-panel [hidden]{display:none!important}.distance-time-graph-result-panel dl{grid-template-columns:repeat(3,minmax(0,1fr))}.balanced-force-simulator-section{margin-left:-32px;margin-right:-32px}.balanced-force-simulator-card{grid-template-columns:minmax(0,1fr) 292px}.balanced-force-simulator-card .simulator-workspace{padding:0}.balanced-force-simulator-card .simulator-toolbar{margin-bottom:0;padding:8px 8px 0}.balanced-force-simulator-card .simulator-heading{font-size:.98rem;margin:4px 0 3px;padding:0 8px}.balanced-force-simulator-card .simulator-note{color:#536f7a;font-size:.78rem;margin:0 0 6px;padding:0 8px}.balanced-force-stage{border-left:0;border-right:0;border-radius:0;min-height:520px;overflow:hidden}.balanced-force-stage svg{min-height:520px;min-width:0;width:100%}.balanced-force-simulator-card .speed-result-panel{border-left:0;border-right:0;border-radius:0;margin:0}.balanced-force-simulator-card .speed-result-panel dl{grid-template-columns:repeat(3,minmax(0,1fr))}.unbalanced-force-simulator-section{margin-left:-32px;margin-right:-32px}.unbalanced-force-simulator-card{grid-template-columns:minmax(0,1fr) 292px}.unbalanced-force-simulator-card .simulator-workspace{padding:0}.unbalanced-force-simulator-card .simulator-toolbar{margin-bottom:0;padding:8px 8px 0}.unbalanced-force-simulator-card .simulator-heading{font-size:.98rem;margin:4px 0 3px;padding:0 8px}.unbalanced-force-simulator-card .simulator-note{color:#536f7a;font-size:.78rem;margin:0 0 6px;padding:0 8px}.unbalanced-force-stage{border-left:0;border-radius:0;border-right:0;min-height:520px;overflow:hidden}.unbalanced-force-stage svg{min-height:520px;min-width:0;width:100%}.unbalanced-force-simulator-card .speed-result-panel{border-left:0;border-radius:0;border-right:0;margin:0}.unbalanced-force-simulator-card .speed-result-panel dl{grid-template-columns:repeat(3,minmax(0,1fr))}.net-force-simulator-section{margin-left:-32px;margin-right:-32px}.net-force-simulator-card{grid-template-columns:minmax(0,1fr) 292px}.net-force-simulator-card .simulator-workspace{padding:0}.net-force-simulator-card .simulator-toolbar{margin-bottom:0;padding:8px 8px 0}.net-force-simulator-card .simulator-heading{font-size:.98rem;margin:4px 0 3px;padding:0 8px}.net-force-simulator-card .simulator-note{color:#536f7a;font-size:.78rem;margin:0 0 6px;padding:0 8px}.net-force-stage{border-left:0;border-radius:0;border-right:0;min-height:520px;overflow:hidden}.net-force-stage svg{min-height:520px;min-width:0;width:100%}.net-force-simulator-card .speed-result-panel{border-left:0;border-radius:0;border-right:0;margin:0}.net-force-simulator-card .speed-result-panel dl{grid-template-columns:repeat(3,minmax(0,1fr))}.distance-time-graph-card-grid .comparison-card{background:linear-gradient(180deg,#f0f8fff5,#fffffffa),#fff;border-top:3px solid #1266d6}.mini-meaning-grid{display:grid;gap:10px;grid-template-columns:repeat(2,minmax(0,1fr))}.mini-meaning-grid article{border:1px solid #d8e7ed;border-radius:8px;background:#fbfeff;padding:10px}.mini-meaning-grid h3{margin:0 0 6px;font-size:.95rem;color:#12323d}.mini-meaning-grid p{margin:0;font-size:.9rem}.distance-time-graph-mini{background:#fbfeff;border-radius:8px}@media (max-width: 1080px){.distance-time-graph-simulator-card{grid-template-columns:1fr}}@media (max-width: 640px){.distance-time-graph-result-panel dl,.mini-meaning-grid{grid-template-columns:1fr}}.average-velocity-mini-map{background:#fbfeff;border-radius:8px}.table-wrap{overflow-x:auto}.acceleration-type-grid{display:grid;gap:10px;grid-template-columns:repeat(3,minmax(0,1fr))}.acceleration-type-grid article{background:#fff;border:1px solid #f1d8b3;border-radius:8px;padding:10px}.acceleration-type-grid h3{font-size:.84rem;margin:0 0 5px}.acceleration-type-grid p{margin:0}.acceleration-mini-road{background:#fbfeff;border-radius:8px}@media (min-width: 1181px){.topbar,.footer,.trust-band,.section-grid,.featured-section,.method-section,.difference-section,.faq-section,.library-hero,.chapter-directory,.full-directory,.topic-shell,.breadcrumbs,.search-results-section{max-width:1240px}}@media (min-width: 1320px){.topbar,.footer,.trust-band,.section-grid,.featured-section,.method-section,.difference-section,.faq-section,.library-hero,.chapter-directory,.full-directory,.topic-shell,.breadcrumbs,.search-results-section{max-width:1280px}}@media (max-width: 1120px){.featured-list{grid-template-columns:repeat(2,minmax(0,1fr))}.subject-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.chapter-card-grid,.chapter-topic-page .directory-sections,.search-results,.topic-content-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.topic-page-shell{grid-template-columns:280px minmax(0,1fr)}.topic-page-shell:has(.topic-sidebar-panel:not([open])){grid-template-columns:64px minmax(0,1fr)}.simulator-card,.distance-simulator-card,.speed-simulator-card,.balanced-force-simulator-card,.unbalanced-force-simulator-card,.net-force-simulator-card,.velocity-simulator-card,.acceleration-simulator-card{grid-template-columns:1fr}.speed-result-panel dl{grid-template-columns:repeat(3,minmax(0,1fr))}.simulator-panel{border-left:0;border-top:1px solid #d8e7ed;grid-template-columns:repeat(2,minmax(0,1fr))}.simulator-panel h2,.simulator-panel button,.speed-control-panel h3,.speed-control-panel .control-grid-2,.speed-control-panel .speed-copy-link,.velocity-control-panel .velocity-straight-controls,.velocity-control-panel .velocity-step-controls,.velocity-control-panel .velocity-toggle-list,.acceleration-control-panel .acceleration-car-controls,.acceleration-control-panel .acceleration-fall-controls,.acceleration-control-panel .acceleration-toggle-list{grid-column:1 / -1}.distance-control-panel{grid-template-columns:repeat(2,minmax(0,1fr))}.distance-control-panel h2,.distance-control-panel .number-line-controls,.distance-control-panel .toggle-list,.distance-control-panel .control-grid-2{grid-column:1 / -1}.solved-grid,.simulator-card.is-fullscreen{grid-template-columns:1fr}.simulator-card.is-fullscreen .simulator-stage,.simulator-card.is-fullscreen .simulator-stage svg{min-height:calc(100vh - 360px)}.simulator-card.is-fullscreen .speed-stage,.simulator-card.is-fullscreen .speed-stage svg{min-height:calc(100vh - 320px)}.simulator-card.is-fullscreen .velocity-stage,.simulator-card.is-fullscreen .velocity-stage svg{min-height:calc(100vh - 320px)}.simulator-card.is-fullscreen .balanced-force-stage,.simulator-card.is-fullscreen .balanced-force-stage svg{min-height:calc(100vh - 320px)}.simulator-card.is-fullscreen .unbalanced-force-stage,.simulator-card.is-fullscreen .unbalanced-force-stage svg{min-height:calc(100vh - 320px)}.simulator-card.is-fullscreen .net-force-stage,.simulator-card.is-fullscreen .net-force-stage svg{min-height:calc(100vh - 320px)}.simulator-card.is-fullscreen .acceleration-stage,.simulator-card.is-fullscreen .acceleration-stage svg{min-height:calc(100vh - 320px)}}@media (max-width: 980px){.hero,.section-grid,.method-section,.difference-section{grid-template-columns:1fr}.hero{min-height:auto;padding-bottom:32px;padding-top:28px}.hero-lab{min-height:720px}.subject-grid,.trust-band{grid-template-columns:repeat(2,minmax(0,1fr))}.directory-sections{grid-template-columns:1fr}.subject-card{min-height:280px}.topic-page-shell{display:block}.topic-sidebar{display:none}.topic-mobile-nav{background:#fff;border:1px solid #d8e7ed;border-radius:8px;box-shadow:0 10px 28px #154e6214;display:block;margin:12px 18px 0;padding:0}.topic-mobile-nav>summary{padding:0 14px}.topic-mobile-nav .topic-sidebar-search,.topic-mobile-nav .topic-tree{padding:0 14px 14px}.topic-main{padding-left:18px;padding-right:18px}.distance-simulator-section,.speed-simulator-section{margin-left:-18px;margin-right:-18px}.learning-card-grid,.practice-grid,.speed-card-grid,.speed-secondary-grid,.acceleration-type-grid{grid-template-columns:1fr}.topic-title-row{align-items:flex-start;flex-direction:column}.topic-topline{align-items:flex-start;flex-direction:column;gap:6px}.topic-quick-links{justify-content:flex-start;padding-top:0}}@media (max-width: 760px){.featured-list,.subject-grid,.trust-band,.chapter-card-grid,.chapter-topic-page .directory-sections,.search-results{grid-template-columns:1fr}.topbar,.footer{align-items:flex-start;flex-direction:column;gap:14px;padding-bottom:16px;padding-top:16px}}@media (max-width: 680px){nav{gap:8px 14px}.hero{gap:16px;min-height:auto;padding-bottom:20px;padding-left:16px;padding-right:16px}h1{font-size:3.5rem;margin-bottom:14px}.hero-lede{font-size:1.04rem;line-height:1.42}.search-panel{margin:16px 0 12px;padding:10px}.search-row{grid-template-columns:minmax(0,1fr) auto}.search-row input,.search-row button,.hero-actions a{min-height:42px}.hero-actions{gap:8px}.lab-header{padding:14px 14px 8px}.lab-header h2{font-size:1.08rem}.lab-link{min-height:36px;padding:0 12px}canvas{height:150px}.hero-lab canvas{height:100%}.hero-lab .lab-header,.hero-lab .controls{display:none}.controls{gap:10px;grid-template-columns:repeat(2,minmax(0,1fr));padding:10px 14px 12px}.formula-stats{display:none}.trust-band,.section-grid,.featured-section,.method-section,.difference-section,.faq-section,.library-hero,.chapter-directory,.full-directory,.topic-shell,.breadcrumbs,.search-results-section,.topic-main{padding-left:16px;padding-right:16px}.distance-simulator-section,.speed-simulator-section{margin-left:-16px;margin-right:-16px}.topic-quick-links a{font-size:.7rem;min-height:26px;padding:5px 8px}.library-hero h1,.topic-hero h1{font-size:3.4rem}.topic-main .topic-hero h1{font-size:1.48rem}.simulator-workspace,.simulator-panel,.topic-card{padding:14px}.simulator-workspace{padding:0}.definition-points{padding-right:0}.mini-path{display:none}.concept-table{font-size:.72rem}.simulator-toolbar button{flex:1 1 130px}.simulator-expand-button{margin-left:0}.simulator-stage,.simulator-stage svg{min-height:230px}.simulator-card.is-fullscreen{inset:8px;overflow:auto}.simulator-card.is-fullscreen .simulator-stage,.simulator-card.is-fullscreen .simulator-stage svg{min-height:300px}.distance-stage,.distance-stage svg{min-height:360px}.balanced-force-stage,.balanced-force-stage svg{min-height:430px}.balanced-force-simulator-card .speed-result-panel dl{grid-template-columns:1fr}.unbalanced-force-stage,.unbalanced-force-stage svg{min-height:430px}.unbalanced-force-simulator-card .speed-result-panel dl{grid-template-columns:1fr}.net-force-stage,.net-force-stage svg{min-height:430px}.net-force-simulator-card .speed-result-panel dl{grid-template-columns:1fr}.live-result-panel{position:static;width:auto;margin:10px}.speed-result-panel dl{grid-template-columns:1fr}.formula-overlay{bottom:10px;font-size:.72rem;left:10px}.definition-columns,.distance-control-panel,.distance-control-panel .control-grid-2{grid-template-columns:1fr}.directory-chapter header{align-items:flex-start;flex-direction:column}.subject-card,.featured-list article a,.chapter-card{min-height:auto}.topic-content-grid,.simulator-panel{grid-template-columns:1fr}}@media (max-width: 420px){.search-row{grid-template-columns:1fr}.hero-actions a{width:100%}.controls{grid-template-columns:1fr}h1{font-size:3.2rem}}@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}}.newtons-first-law-simulator-section,.newtons-second-law-simulator-section,.newtons-third-law-simulator-section{margin-left:-32px;margin-right:-32px}.newtons-first-law-simulator-card,.newtons-second-law-simulator-card,.newtons-third-law-simulator-card,.inertia-simulator-card,.momentum-simulator-card,.gravity-simulator-card,.impulse-simulator-card{grid-template-columns:minmax(0,1fr) 292px}.newtons-first-law-simulator-card .simulator-workspace,.newtons-second-law-simulator-card .simulator-workspace,.newtons-third-law-simulator-card .simulator-workspace,.inertia-simulator-card .simulator-workspace,.momentum-simulator-card .simulator-workspace,.gravity-simulator-card .simulator-workspace,.impulse-simulator-card .simulator-workspace{padding:0}.newtons-first-law-simulator-card .simulator-toolbar,.newtons-second-law-simulator-card .simulator-toolbar,.newtons-third-law-simulator-card .simulator-toolbar,.inertia-simulator-card .simulator-toolbar,.momentum-simulator-card .simulator-toolbar,.gravity-simulator-card .simulator-toolbar,.impulse-simulator-card .simulator-toolbar{margin-bottom:0;padding:8px 8px 0}.newtons-first-law-simulator-card .simulator-heading,.newtons-second-law-simulator-card .simulator-heading,.newtons-third-law-simulator-card .simulator-heading,.inertia-simulator-card .simulator-heading,.momentum-simulator-card .simulator-heading,.gravity-simulator-card .simulator-heading,.impulse-simulator-card .simulator-heading{font-size:.98rem;margin:4px 0 3px;padding:0 8px}.newtons-first-law-simulator-card .simulator-note,.newtons-second-law-simulator-card .simulator-note,.newtons-third-law-simulator-card .simulator-note,.inertia-simulator-card .simulator-note,.momentum-simulator-card .simulator-note,.gravity-simulator-card .simulator-note,.impulse-simulator-card .simulator-note{color:#536f7a;font-size:.78rem;margin:0 0 6px;padding:0 8px}.newtons-first-law-stage,.newtons-second-law-stage,.newtons-third-law-stage,.inertia-stage,.momentum-stage,.gravity-stage,.impulse-stage{border-left:0;border-right:0;border-radius:0;min-height:520px;overflow:hidden;position:relative;background:#fbfeff;border-top:1px solid #d8e7ed;border-bottom:1px solid #d8e7ed}.newtons-first-law-stage svg,.newtons-second-law-stage svg,.newtons-third-law-stage svg,.inertia-stage svg,.momentum-stage svg,.gravity-stage svg,.impulse-stage svg{min-height:520px;min-width:0;width:100%;display:block}.newtons-first-law-simulator-card .speed-result-panel,.newtons-second-law-simulator-card .speed-result-panel,.newtons-third-law-simulator-card .speed-result-panel,.inertia-simulator-card .speed-result-panel,.momentum-simulator-card .speed-result-panel,.gravity-simulator-card .speed-result-panel,.impulse-simulator-card .speed-result-panel{border-left:0;border-right:0;border-radius:0;margin:0}.newtons-first-law-simulator-card .speed-result-panel dl,.newtons-second-law-simulator-card .speed-result-panel dl,.newtons-third-law-simulator-card .speed-result-panel dl,.inertia-simulator-card .speed-result-panel dl,.momentum-simulator-card .speed-result-panel dl,.gravity-simulator-card .speed-result-panel dl,.impulse-simulator-card .speed-result-panel dl{grid-template-columns:repeat(3,minmax(0,1fr))}.simulator-card.is-fullscreen .newtons-first-law-stage,.simulator-card.is-fullscreen .newtons-first-law-stage svg,.simulator-card.is-fullscreen .newtons-second-law-stage,.simulator-card.is-fullscreen .newtons-second-law-stage svg,.simulator-card.is-fullscreen .newtons-third-law-stage,.simulator-card.is-fullscreen .newtons-third-law-stage svg,.simulator-card.is-fullscreen .inertia-stage,.simulator-card.is-fullscreen .inertia-stage svg,.simulator-card.is-fullscreen .momentum-stage,.simulator-card.is-fullscreen .momentum-stage svg,.simulator-card.is-fullscreen .gravity-stage,.simulator-card.is-fullscreen .gravity-stage svg,.simulator-card.is-fullscreen .impulse-stage,.simulator-card.is-fullscreen .impulse-stage svg{min-height:calc(100vh - 320px)}@media (max-width: 980px){.newtons-first-law-simulator-section,.newtons-second-law-simulator-section,.newtons-third-law-simulator-section,.inertia-simulator-section,.momentum-simulator-section,.gravity-simulator-section,.impulse-simulator-section{margin-left:-16px;margin-right:-16px}.newtons-first-law-simulator-card,.newtons-second-law-simulator-card,.newtons-third-law-simulator-card,.inertia-simulator-card,.momentum-simulator-card,.gravity-simulator-card,.impulse-simulator-card{grid-template-columns:1fr}.newtons-first-law-simulator-card .speed-result-panel dl,.newtons-second-law-simulator-card .speed-result-panel dl,.newtons-third-law-simulator-card .speed-result-panel dl,.inertia-simulator-card .speed-result-panel dl,.momentum-simulator-card .speed-result-panel dl,.gravity-simulator-card .speed-result-panel dl,.impulse-simulator-card .speed-result-panel dl{grid-template-columns:repeat(3,minmax(0,1fr))}}.speed-result-panel dt,.speed-result-panel dd,.speed-control-panel label,.speed-control-panel .slider-val-bubble,.speed-control-panel button,.toggle-list label{font-size:.88rem!important}.speed-result-panel h3{font-size:1.05rem!important}.speed-control-panel input,.speed-control-panel select{font-size:.95rem!important}.simulator-info-button:hover{color:#0ea5e9!important}.gravity-topic-main{margin-top:4px!important}.gravity-topic-main .topic-topline{padding-top:4px!important}.gravity-topic-main .topic-topline .breadcrumbs,.gravity-topic-main .topic-topline .topic-quick-links{padding-top:0!important;margin-top:2px!important;margin-bottom:2px!important}.gravity-topic-main .topic-quick-links a{min-height:24px!important;padding:3px 6px!important;font-size:.68rem!important}.gravity-topic-main .topic-hero{padding:6px 12px!important;margin-bottom:8px!important;min-height:auto!important}.gravity-topic-main .topic-hero h1{font-size:1.45rem!important;margin-bottom:2px!important}.gravity-topic-main .topic-hero p{font-size:.8rem!important;line-height:1.4!important;margin-bottom:0!important;max-width:850px!important}.gravity-topic-main .topic-share-button{padding:4px 8px!important;font-size:.75rem!important}.gravity-topic-main .topic-share-button svg{width:14px!important;height:14px!important}.gravity-topic-main .impulse-simulator-card:not(.is-fullscreen) .impulse-stage,.gravity-topic-main .impulse-simulator-card:not(.is-fullscreen) .impulse-stage svg,.gravity-topic-main .simulator-card:not(.is-fullscreen) .simulator-stage,.gravity-topic-main .simulator-card:not(.is-fullscreen) .simulator-stage svg{min-height:380px!important;height:380px!important}.gravity-topic-main .impulse-simulator-card.is-fullscreen .impulse-stage,.gravity-topic-main .impulse-simulator-card.is-fullscreen .impulse-stage svg,.gravity-topic-main .simulator-card.is-fullscreen .simulator-stage,.gravity-topic-main .simulator-card.is-fullscreen .simulator-stage svg{min-height:calc(100vh - 210px)!important;height:calc(100vh - 210px)!important}.gravity-topic-main .impulse-simulator-card .impulse-stage svg,.gravity-topic-main .simulator-card .simulator-stage svg{aspect-ratio:920 / 560}.gravity-topic-main .speed-control-panel,.gravity-topic-main .simulator-panel{padding:10px 12px!important;gap:6px!important}.gravity-topic-main .speed-control-panel h3,.gravity-topic-main .simulator-panel h3{font-size:.95rem!important;margin-bottom:4px!important;padding-bottom:2px!important}.gravity-topic-main .speed-control-panel label,.gravity-topic-main .simulator-panel label{margin-bottom:3px!important;gap:1px!important;font-size:.8rem!important}.gravity-topic-main .speed-control-panel input,.gravity-topic-main .speed-control-panel select,.gravity-topic-main .simulator-panel input,.gravity-topic-main .simulator-panel select{font-size:.85rem!important}.gravity-topic-main .speed-control-panel .slider-val-bubble,.gravity-topic-main .simulator-panel .slider-val-bubble{font-size:.78rem!important}.gravity-topic-main .speed-control-panel button,.gravity-topic-main .simulator-panel button{font-size:.78rem!important;padding:6px!important}.gravity-topic-main .toggle-list label{font-size:.78rem!important}.gravity-topic-main .toggle-list{margin:2px 0!important;padding:4px 8px!important;gap:2px!important}.gravity-topic-main .control-grid-2{gap:4px!important}.gravity-topic-main .speed-result-panel{padding:6px 12px!important;margin:0!important;border-top:1px solid #1e293b!important;background:#0f172a!important;color:#e2e8f0!important}.gravity-topic-main .speed-result-panel h3{font-size:.9rem!important;margin-bottom:4px!important;color:#94a3b8!important}.gravity-topic-main .speed-result-panel dl{gap:4px 12px!important}.gravity-topic-main .speed-result-panel div{padding:2px 0!important}.gravity-topic-main .speed-result-panel dt{font-size:.78rem!important;color:#94a3b8!important}.gravity-topic-main .speed-result-panel dd{font-size:.84rem!important}.shm-topic-main .topic-topline{align-items:center!important;gap:10px!important;padding-block:6px!important}.shm-topic-main .topic-quick-links{margin-left:auto!important}.shm-topic-main .topic-hero{padding-block:7px!important}.shm-topic-main .topic-hero h1{margin-bottom:4px!important}.shm-topic-main .topic-hero p{margin-bottom:0!important}.shm-topic-main .eyebrow{margin-bottom:3px!important}.shm-topic-main :is(.oscillation-simulator-section,.mss-simulator-section,.pend-simulator-section,.period-simulator-section,.res-simulator-section){margin:8px -20px 26px!important;padding:0!important}.shm-topic-main :is(.oscillation-simulator-card,.mss-simulator-card,.pend-simulator-card,.period-simulator-card,.res-simulator-card){border-radius:12px!important;gap:0!important;grid-template-columns:minmax(0,1fr) 292px!important;overflow:hidden!important}.shm-topic-main :is(.oscillation-workspace,.mss-workspace,.pend-workspace,.period-workspace,.res-workspace,.simulator-workspace){min-width:0!important;padding:0!important}.shm-topic-main :is(.oscillation-toolbar,.mss-toolbar,.pend-toolbar,.period-toolbar,.res-toolbar,.simulator-toolbar){padding:7px 8px!important}.shm-topic-main :is(.oscillation-heading-row,.mss-heading-row,.pend-heading-row,.period-heading-row,.res-heading-row){gap:8px!important;padding:7px 10px!important}.shm-topic-main .simulator-heading{font-size:clamp(1.08rem,1.8vw,1.55rem)!important;line-height:1.12!important;margin-bottom:3px!important}.shm-topic-main .simulator-note{font-size:.82rem!important;line-height:1.35!important;margin:0!important}.shm-topic-main :is(.oscillation-stage,.mss-stage,.pend-stage,.period-stage,.res-stage){border-radius:0!important;margin:0!important}.shm-topic-main :is(.oscillation-control-panel,.mss-control-panel,.pend-control-panel,.period-control-panel,.res-control-panel,.speed-control-panel,.simulator-panel){background:linear-gradient(180deg,#f8fbff,#eef7ff)!important;border-left:1px solid #d8e6ef!important;box-shadow:inset 1px 0 #fffc!important;gap:7px!important;padding:10px 11px!important}.shm-topic-main :is(.oscillation-control-panel,.mss-control-panel,.pend-control-panel,.period-control-panel,.res-control-panel,.speed-control-panel,.simulator-panel) h3{color:#0f3d4f!important;font-size:.95rem!important;line-height:1.15!important;margin:0 0 4px!important}.shm-topic-main :is(.oscillation-control-panel,.mss-control-panel,.pend-control-panel,.period-control-panel,.res-control-panel,.speed-control-panel,.simulator-panel) label{color:#315262!important;font-size:.76rem!important;font-weight:800!important;gap:3px!important;line-height:1.2!important;margin:0!important}.shm-topic-main :is(.oscillation-control-panel,.mss-control-panel,.pend-control-panel,.period-control-panel,.res-control-panel,.speed-control-panel,.simulator-panel) :is(input,select){border-radius:8px!important;font-size:.8rem!important;min-height:32px!important;padding:5px 8px!important}.shm-topic-main :is(.oscillation-control-panel,.mss-control-panel,.pend-control-panel,.period-control-panel,.res-control-panel,.speed-control-panel,.simulator-panel) input[type=range]{min-height:22px!important;padding:0!important}.shm-topic-main :is(.oscillation-control-panel,.mss-control-panel,.pend-control-panel,.period-control-panel,.res-control-panel,.speed-control-panel,.simulator-panel) input[type=checkbox]{height:16px!important;min-height:16px!important;width:16px!important}.shm-topic-main :is(.oscillation-control-panel,.mss-control-panel,.pend-control-panel,.period-control-panel,.res-control-panel,.speed-control-panel,.simulator-panel) button{border-radius:8px!important;font-size:.78rem!important;min-height:32px!important;padding:6px 8px!important}.shm-topic-main :is(.oscillation-control-panel,.mss-control-panel,.pend-control-panel,.period-control-panel,.res-control-panel) .range-display{background:#e0f2fe!important;border:1px solid #bae6fd!important;border-radius:999px!important;color:#0369a1!important;float:none!important;font-size:.72rem!important;padding:1px 7px!important}.shm-topic-main :is(.oscillation-result-panel,.mss-result-panel,.pend-result-panel,.period-result-panel,.res-result-panel,.speed-result-panel){background:linear-gradient(120deg,#eff6fff5,#fffbebc7)!important;border-top:1px solid #d8e6ef!important;color:#0f2f3f!important;margin:0!important;padding:10px 12px!important}.shm-topic-main :is(.oscillation-result-panel,.mss-result-panel,.pend-result-panel,.period-result-panel,.res-result-panel,.speed-result-panel) h3{color:#135e7a!important;display:block!important;font-size:.82rem!important;letter-spacing:.04em!important;line-height:1.2!important;margin:0 0 8px!important;overflow:visible!important;text-transform:uppercase!important;white-space:normal!important}.shm-topic-main :is(.oscillation-result-panel,.mss-result-panel,.pend-result-panel,.period-result-panel,.res-result-panel,.speed-result-panel) dl{display:grid!important;gap:8px!important;grid-template-columns:repeat(auto-fit,minmax(130px,1fr))!important;margin:0!important;padding:0!important}.shm-topic-main :is(.oscillation-result-panel,.mss-result-panel,.pend-result-panel,.period-result-panel,.res-result-panel,.speed-result-panel) dl div{align-items:flex-start!important;background:#ffffffe0!important;border:1px solid rgba(56,189,248,.18)!important;border-radius:10px!important;display:flex!important;flex-direction:column!important;gap:5px!important;min-height:64px!important;overflow:visible!important;padding:9px 10px!important}.shm-topic-main :is(.oscillation-result-panel,.mss-result-panel,.pend-result-panel,.period-result-panel,.res-result-panel,.speed-result-panel) dt{color:#557081!important;display:block!important;font-size:.68rem!important;font-weight:900!important;letter-spacing:.03em!important;line-height:1.2!important;max-width:none!important;overflow:visible!important;text-overflow:unset!important;text-transform:uppercase!important;white-space:normal!important}.shm-topic-main :is(.oscillation-result-panel,.mss-result-panel,.pend-result-panel,.period-result-panel,.res-result-panel,.speed-result-panel) dd{color:#0e3447!important;display:block!important;font-size:.98rem!important;font-weight:900!important;line-height:1.15!important;margin:0!important;overflow-wrap:anywhere!important;text-align:left!important;white-space:normal!important}.shm-topic-main :is(.topic-faq-section,.faqs-section){background:linear-gradient(180deg,#f8fbff,#eef8ff)!important;border:1px solid #dbeaf2!important;border-radius:14px!important;box-shadow:0 16px 36px #12323d14!important;margin-top:42px!important;padding:18px!important}.shm-topic-main :is(.topic-faq-section,.faqs-section) h2{color:#12323d!important;font-size:clamp(1.35rem,2vw,1.9rem)!important;margin-bottom:14px!important}.shm-topic-main :is(.faq-list,.faqs-list){display:grid!important;gap:10px!important;margin:0!important}.shm-topic-main :is(.faq-list details,.faqs-list div){background:#fff!important;border:1px solid #d9e9f2!important;border-radius:12px!important;box-shadow:0 8px 18px #12323d0f!important;padding:12px 14px!important}.shm-topic-main :is(.faq-list summary,.faqs-list dt){color:#12323d!important;cursor:pointer!important;font-size:.98rem!important;font-weight:900!important;line-height:1.35!important}.shm-topic-main :is(.faq-list p,.faqs-list dd){color:#385864!important;font-size:.93rem!important;line-height:1.55!important;margin:8px 0 0!important}@media (max-width: 1120px){.shm-topic-main :is(.oscillation-simulator-card,.mss-simulator-card,.pend-simulator-card,.period-simulator-card,.res-simulator-card){grid-template-columns:1fr!important}.shm-topic-main :is(.oscillation-control-panel,.mss-control-panel,.pend-control-panel,.period-control-panel,.res-control-panel,.speed-control-panel,.simulator-panel){border-left:0!important;border-top:1px solid #d8e6ef!important;display:grid!important;grid-template-columns:repeat(2,minmax(0,1fr))!important}}@media (max-width: 720px){.shm-topic-main :is(.oscillation-simulator-section,.mss-simulator-section,.pend-simulator-section,.period-simulator-section,.res-simulator-section){margin-inline:-12px!important}.shm-topic-main :is(.oscillation-control-panel,.mss-control-panel,.pend-control-panel,.period-control-panel,.res-control-panel,.speed-control-panel,.simulator-panel){grid-template-columns:1fr!important}}
