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/* Observatory finish */
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.planet-kicker{color:#8c682e!important}body[data-theme="light"] .planet-info>p:not(.planet-kicker){color:#435047}body[data-theme="light"] .planet-info dl,body[data-theme="light"] .planet-info dl div{border-color:#ddd8cc}body[data-theme="light"] .planet-info dt{color:#6e766c}body[data-theme="light"] .planet-info dd{color:#263129}body[data-theme="light"] .planet-info .scale-note{color:#68736b!important}body[data-theme="light"] .solar-controls{background:#fffefa;border-color:#d9d5cc;color:#354139}body[data-theme="light"] .solar-controls button{background:#f7f4ec;border-color:#d7d1c4;color:#27332b}body[data-theme="light"] .solar-controls label{color:#68736b}body[data-theme="light"] .activities h2{color:#18231d}body[data-theme="light"] .activity-list,body[data-theme="light"] .activity-list a{border-color:#dcd9d0}body[data-theme="light"] .activity-list a span:first-child{color:#202c24}body[data-theme="light"] .activity-list a span+span{color:#606b63}body[data-theme="light"] footer{border-color:#dedbd2;color:#68736b}@keyframes sun-breathe{0%,100%{opacity:.28}50%{opacity:.45}}@media(max-width:760px){.solar-feature{padding:34px 0 28px}.solar-layout{grid-template-columns:minmax(0,1fr) 230px;gap:13px}.planet-info{padding:18px 16px}.planet-info h2{font-size:25px}.activities{margin-top:0}}@media(max-width:600px){.site-header{padding-inline:18px;height:64px}.site-header nav{gap:3px}.site-header nav a{font-size:12px;padding:7px 6px}.theme-toggle{padding:8px 10px;font-size:11px}.solar-layout{grid-template-columns:1fr}.solar-view{min-height:0}.planet-info{padding:18px}.activity-list{grid-template-columns:1fr}.activity-list a{min-height:51px}.solar-controls{gap:9px}.solar-controls label{margin-left:auto}.solar-controls input{width:84px}}
.sun-secret{cursor:pointer;outline:none}.sun-secret:focus-visible .sun{stroke:#fff7d5;stroke-width:3;stroke-opacity:1}.catalogue-main{max-width:1120px}.catalogue-heading{padding:26px 0 24px;border-bottom:1px solid var(--line)}.catalogue-heading h1{font:500 clamp(30px,4vw,42px) Georgia,serif;letter-spacing:-.025em;margin:0 0 8px}.catalogue-heading p{margin:0;color:var(--muted);font-size:14px}.catalogue-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:16px;padding:24px 0;min-height:230px}.catalogue-empty{min-height:174px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;border:1px dashed #3b4654;border-radius:13px;background:linear-gradient(145deg,#171e28,#111720);color:#adb7c4}.catalogue-empty p{margin:0;font-size:13px}.catalogue-empty-icon{width:38px;height:38px;display:grid;place-items:center;border-radius:11px;background:#28303b;color:#e5b764;font-size:18px}body[data-theme="light"] .catalogue-empty{background:linear-gradient(145deg,#fffefa,#efede6);border-color:#d3cec2;color:#59645c}body[data-theme="light"] .catalogue-empty-icon{background:#f1ead7;color:#856229}@media(max-width:560px){.catalogue-main{padding-top:32px}.catalogue-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.catalogue-empty{min-height:145px}}
.sun-secret{cursor:pointer}.sun-hit-area{fill:transparent;pointer-events:all}.sun-secret:hover .sun-halo,.sun-secret:focus-visible .sun-halo{opacity:.7}.sun-secret:focus-visible .sun{stroke:#fff7d5;stroke-width:3;stroke-opacity:1}
.topic-calculator{margin:36px 0 24px;padding:24px;border:1px solid #343d49;border-radius:13px;background:linear-gradient(145deg,#181f29,#111720)}.topic-calculator>h2{font:500 23px Georgia,serif;margin:0 0 8px}.topic-calculator>p{font-size:13px;color:var(--muted);line-height:1.55;margin:0 0 18px}.topic-calculator .calculator{border-color:#343d49;background:#111720}.topic-calculator .calc-controls{padding:18px}.topic-calculator .answer-panel{min-height:220px}.topic-calculator .answer-panel h3{font-size:16px;margin:0 0 15px}.topic-calculator button{background:#c58e3d;color:#11161b}.topic-calculator button:hover{background:#d6a24f}body[data-theme="light"] .topic-calculator{background:linear-gradient(145deg,#fffefa,#efede6);border-color:#d9d4c8}body[data-theme="light"] .topic-calculator .calculator{border-color:#ded9cd;background:#fff}body[data-theme="light"] .topic-calculator>p{color:#5c675f}
.game-tile{position:relative;min-height:176px;display:flex;flex-direction:column;justify-content:space-between;gap:20px;padding:20px;border:1px solid #343d4a;border-radius:12px;background:linear-gradient(145deg,#1b2431,#121821);color:var(--ink);text-decoration:none;transition:transform .18s,border-color .18s,background-color .18s}.game-tile:hover{transform:translateY(-2px);border-color:#e3ae59;background:linear-gradient(145deg,#222d3b,#151c26)}.game-tile:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.game-tile-icon{width:44px;height:44px;display:grid;place-items:center;border-radius:10px;background:#28303b;color:#e3ae59;font-size:27px}.game-tile-copy{display:grid;gap:6px}.game-tile-copy strong{font-size:18px;color:#edf0f4}.game-tile-copy>span{font-size:13px;line-height:1.4;color:#aab4c1}.game-tile-arrow{position:absolute;right:20px;bottom:21px;color:#e3ae59;font-size:18px}body[data-theme="light"] .game-tile{background:linear-gradient(145deg,#fffefa,#efede6);border-color:#d3cec2}body[data-theme="light"] .game-tile:hover{border-color:#a47b38;background:linear-gradient(145deg,#fff,#f4efdf)}body[data-theme="light"] .game-tile-icon{background:#f1ead7;color:#856229}body[data-theme="light"] .game-tile-copy strong{color:#18231d}body[data-theme="light"] .game-tile-copy>span{color:#5c675f}body[data-theme="light"] .game-tile-arrow{color:#856229}@media(max-width:560px){.game-tile{min-height:156px;padding:16px}.game-tile-arrow{right:16px;bottom:17px}}
.not-found{max-width:1020px;min-height:calc(100vh - 132px);display:flex;flex-direction:column;align-items:flex-start;justify-content:center;padding-top:68px;padding-bottom:76px}.not-found-code{margin:0 0 18px;color:#e3ae59;font:600 12px ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.13em}.not-found h1{max-width:760px;margin:0;color:#edf0f4;font:500 clamp(36px,7vw,72px)/1.03 Georgia,serif;letter-spacing:-.035em}.not-found>p:not(.not-found-code){max-width:42rem;margin:20px 0 30px;color:#aab4c1;font-size:16px;line-height:1.6}.not-found-actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px}.not-found-primary,.not-found-secondary{min-height:48px;display:inline-flex;align-items:center;justify-content:center;gap:24px;padding:0 17px;border-radius:6px;text-decoration:none;font-size:14px;font-weight:600}.not-found-primary{background:#e3ae59;color:#10141c}.not-found-primary:hover{background:#f0c575}.not-found-secondary{border:1px solid #46515f;color:#edf0f4;background:#1b222c}.not-found-secondary:hover{border-color:#e3ae59}.not-found-actions a:focus-visible{outline:2px solid #e3ae59;outline-offset:3px}@media(max-width:560px){.not-found{min-height:calc(100vh - 116px);padding-top:44px;padding-bottom:56px}.not-found>p:not(.not-found-code){font-size:14px}.not-found-actions{align-items:stretch;flex-direction:column;width:100%}.not-found-primary,.not-found-secondary{justify-content:space-between}}

/* Full-width physics workspace on the homepage */
body[data-theme="dark"]{--ink:#edf0f4;--muted:#aab4c1;--line:#303a47;--soft:#171e28}
body[data-theme="dark"] main.home-main{color:#edf0f4}
.home-main{width:min(100% - 48px,1320px);max-width:1320px;padding:42px 0 88px}
.home-main .solar-feature{padding:18px 0 44px}
.home-main .solar-layout{grid-template-columns:minmax(0,1fr) 310px;gap:26px}
.home-main .solar-view{min-height:0}
.home-main .planet-info{padding:28px}
.home-main .tools-hub{padding:68px 0 0;scroll-margin-top:30px}
.tools-heading{display:flex;justify-content:space-between;align-items:end;gap:32px;margin-bottom:25px}
.tools-kicker{margin:0 0 11px;color:#e3ae59;font:600 11px/1.3 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.12em}
.tools-heading h2{margin:0 0 10px;color:#f0f2f5;font:500 clamp(30px,4vw,44px)/1.08 Georgia,"Times New Roman",serif;letter-spacing:-.025em}
.tools-heading p:not(.tools-kicker){margin:0;color:#aab4c1;font-size:15px;line-height:1.55}
.tool-search-wrap{max-width:720px;margin:28px 0 23px}
.tool-search-wrap>label{display:block;margin:0 0 8px;color:#e6eaf0;font-size:13px;font-weight:600}
.tool-search-box{height:54px;display:flex;align-items:center;gap:12px;padding:0 15px;border:1px solid #3a4655;border-radius:9px;background:#141b25;color:#e3ae59;transition:border-color .16s,box-shadow .16s}
.tool-search-box:focus-within{border-color:#e3ae59;box-shadow:0 0 0 3px #e3ae5922}
.tool-search-box>span{font-size:25px;line-height:1}
.tool-search-box input{min-width:0;flex:1;border:0;outline:0;background:transparent;color:#f0f2f5;font:15px Arial,Helvetica,sans-serif}
.tool-search-box input::placeholder{color:#8390a0}
.tool-search-box button{width:30px;height:30px;border:0;border-radius:50%;background:#28313e;color:#e5e9ef;font-size:22px;cursor:pointer}
.search-hint{margin:8px 0 0;color:#8995a4;font-size:12px}
.tool-tablist{position:relative;display:flex;gap:7px;overflow-x:auto;padding:5px 0 13px;border-bottom:1px solid #303a47;scrollbar-width:thin;scrollbar-color:#526071 transparent}
.tool-tab{flex:0 0 auto;min-height:42px;padding:0 16px;border:1px solid #3a4654;border-radius:7px;background:#151c26;color:#c4ccd6;font:600 13px Arial,Helvetica,sans-serif;cursor:pointer;white-space:nowrap}
.tool-tab:hover{border-color:#778392;color:#f2f4f7}
.tool-tab[aria-selected="true"]{border-color:#e3ae59;background:#e3ae59;color:#171a1e}
.tool-tab:focus-visible,.tool-search-box button:focus-visible,.equation-card:focus-visible,.tool-panel-heading>a:focus-visible{outline:2px solid #e3ae59;outline-offset:3px}
.tool-panel{padding:32px 0 8px;scroll-margin-top:20px}
.tool-panel[hidden],.search-results[hidden]{display:none}
.tool-panel-heading{display:flex;justify-content:space-between;align-items:end;gap:28px;padding:0 0 22px;border-bottom:1px solid #303a47}
.tool-panel-heading h3{margin:0 0 9px;color:#f0f2f5;font:500 clamp(25px,3vw,34px)/1.12 Georgia,"Times New Roman",serif;letter-spacing:-.02em}
.tool-panel-heading p:not(.tools-kicker){max-width:730px;margin:0;color:#aab4c1;font-size:14px;line-height:1.6}
.tool-panel-heading>a{flex:0 0 auto;padding:11px 14px;border:1px solid #46515f;border-radius:7px;color:#e3ae59;text-decoration:none;font-size:13px;font-weight:600}
.tool-panel-heading>a:hover{border-color:#e3ae59;background:#e3ae5914}
.equation-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;padding:20px 0}
.equation-card{min-width:0;min-height:148px;display:flex;flex-direction:column;align-items:flex-start;gap:9px;padding:17px;border:1px solid #303a47;border-radius:9px;background:#141b25;color:#edf0f4;text-align:left;cursor:pointer;transition:transform .16s,border-color .16s,background .16s}
.equation-card:hover,.equation-card.is-selected{transform:translateY(-1px);border-color:#a77e42;background:#1a222c}
.equation-card-topic{color:#e3ae59;font:600 10px ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.1em;text-transform:uppercase}
.equation-card strong{font-size:16px;line-height:1.25}
.equation-card-formula{color:#c2cbd6;font:13px/1.45 ui-monospace,SFMono-Regular,Consolas,monospace}
.equation-card-action{display:flex;justify-content:space-between;gap:12px;width:100%;margin-top:auto;padding-top:8px;color:#8f9bab;font-size:11px}
.equation-card-action span{color:#e3ae59;font-size:14px}
.topic-calculator{margin:12px 0 32px;padding:26px}
.topic-calculator>h4{margin:0 0 7px;color:#edf0f4;font:500 22px Georgia,"Times New Roman",serif}
.topic-calculator .calculator{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr)}
.topic-calculator .calc-controls{padding:24px}
.topic-calculator .answer-panel{padding:26px}
.search-results{max-width:100%;margin:20px 0 6px;padding:20px;border:1px solid #3a4654;border-radius:10px;background:#111720}
.search-results-heading{margin:0;color:#f0f2f5;font:500 20px Georgia,"Times New Roman",serif}
.search-result-grid{grid-template-columns:repeat(3,minmax(0,1fr));padding-bottom:0}
.no-search-results{margin:12px 0 0;color:#aab4c1;font-size:14px;line-height:1.55}
body[data-theme="light"] .tools-heading h2,body[data-theme="light"] .tool-panel-heading h3,body[data-theme="light"] .topic-calculator>h4,body[data-theme="light"] .search-results-heading{color:#18231d}
body[data-theme="light"] .tools-heading p:not(.tools-kicker),body[data-theme="light"] .tool-panel-heading p:not(.tools-kicker){color:#5c675f}
body[data-theme="light"] .tool-search-wrap>label{color:#263129}
body[data-theme="light"] .tool-search-box{background:#fffefa;border-color:#d3cec2;color:#856229}
body[data-theme="light"] .tool-search-box input{color:#18231d}
body[data-theme="light"] .tool-search-box input::placeholder{color:#737d74}
body[data-theme="light"] .tool-tablist,body[data-theme="light"] .tool-panel-heading{border-color:#d9d4c8}
body[data-theme="light"] .tool-tab{background:#fffefa;border-color:#d3cec2;color:#414c44}
body[data-theme="light"] .tool-tab[aria-selected="true"]{background:#b67c2d;border-color:#b67c2d;color:#fff}
body[data-theme="light"] .tool-panel-heading>a{border-color:#d3cec2;color:#856229}
body[data-theme="light"] .equation-card{background:#fffefa;border-color:#ded9cd;color:#18231d}
body[data-theme="light"] .equation-card:hover,body[data-theme="light"] .equation-card.is-selected{border-color:#b67c2d;background:#f7f1e3}
body[data-theme="light"] .equation-card-formula{color:#435047}
body[data-theme="light"] .equation-card-action{color:#626d66}
body[data-theme="light"] .search-results{background:#f8f6f0;border-color:#ded9cd}
body[data-theme="light"] .no-search-results{color:#5c675f}
@media(max-width:850px){.home-main{width:min(100% - 36px,1320px)}.home-main .solar-layout{grid-template-columns:minmax(0,1fr) 260px;gap:18px}.equation-grid,.search-result-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.tool-panel-heading{align-items:flex-start;flex-direction:column;gap:17px}}
@media(max-width:620px){.home-main{width:calc(100% - 32px);padding:25px 0 60px}.home-main .solar-layout{grid-template-columns:1fr}.home-main .planet-info{padding:21px}.home-main .tools-hub{padding-top:44px}.tools-heading{margin-bottom:18px}.tools-heading h2{font-size:31px}.tools-heading p:not(.tools-kicker){font-size:14px}.tool-search-wrap{margin:22px 0 17px}.tool-search-box{height:50px}.tool-tablist{margin-inline:-16px;padding-inline:16px}.tool-panel{padding-top:25px}.tool-panel-heading h3{font-size:26px}.equation-grid,.search-result-grid{grid-template-columns:1fr;gap:9px;padding:15px 0}.equation-card{min-height:126px;padding:15px}.topic-calculator{padding:17px;margin:8px 0 24px}.topic-calculator .calculator{grid-template-columns:1fr}.topic-calculator .calc-controls,.topic-calculator .answer-panel{padding:18px}.search-results{padding:15px}.home-main .solar-feature{padding-top:8px}}

/* Tall learning sections and compact privacy footer */
.guide-panel{position:relative;min-height:470px;display:grid;grid-template-columns:minmax(0,1fr) minmax(420px,.94fr);align-items:center;gap:clamp(30px,6vw,90px);margin-top:30px;padding:clamp(30px,5vw,68px);overflow:hidden;border:1px solid #303a47;border-radius:15px;background:linear-gradient(115deg,#151d28 0%,#111720 72%)}
.guide-panel::before{content:"";position:absolute;width:340px;height:340px;right:-130px;top:-190px;border:1px solid #e3ae5922;border-radius:50%;box-shadow:0 0 0 26px #e3ae5908,0 0 0 55px #e3ae5905;pointer-events:none}
.guide-copy{position:relative;z-index:1;max-width:570px}
.guide-copy h2{margin:0 0 17px;color:#f0f2f5;font:500 clamp(31px,4.3vw,48px)/1.08 Georgia,"Times New Roman",serif;letter-spacing:-.03em}
.guide-copy>p:not(.tools-kicker){margin:0 0 20px;color:#b4bfcc;font-size:16px;line-height:1.7}
.guide-copy ul,.guide-copy ol{display:grid;gap:13px;margin:22px 0 28px;padding-left:21px;color:#d4dbe4;font-size:14px;line-height:1.55}
.guide-copy li::marker{color:#e3ae59;font-weight:700}
.guide-copy li strong{color:#f2d08f}
.guide-link{display:inline-flex;align-items:center;gap:25px;min-height:46px;padding:0 15px;border:1px solid #755b35;border-radius:7px;color:#f0c875;text-decoration:none;font-size:13px;font-weight:600}
.guide-link:hover{background:#e3ae5917;border-color:#e3ae59}
.guide-art{position:relative;min-width:0}
.guide-art svg{display:block;width:100%;height:auto;border-radius:18px;filter:drop-shadow(0 20px 35px #03070c55)}
.guide-panel-how{grid-template-columns:minmax(0,.95fr) minmax(420px,1fr);background:linear-gradient(245deg,#182330,#111720 78%)}
.guide-panel-how .guide-art{order:-1}
.guide-panel-when{margin-bottom:12px}
.guide-note{padding-left:13px;border-left:2px solid #e3ae59;color:#929eae!important;font-size:13px!important}
.site-footer{width:min(100% - 48px,1320px);min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px;margin:0 auto;padding:12px 0 20px;border-top:1px solid #29313e;color:#8290a0;font-size:11px}
.site-footer a{color:#d6b66f;text-decoration:none}
.site-footer a:hover{text-decoration:underline}
body[data-theme="light"] .guide-panel{background:linear-gradient(115deg,#fffefa,#f0ede5);border-color:#d9d4c8}
body[data-theme="light"] .guide-panel-how{background:linear-gradient(245deg,#f3efe5,#fffefa 78%)}
body[data-theme="light"] .guide-copy h2{color:#18231d}
body[data-theme="light"] .guide-copy>p:not(.tools-kicker){color:#4e5b52}
body[data-theme="light"] .guide-copy ul,body[data-theme="light"] .guide-copy ol{color:#354239}
body[data-theme="light"] .guide-copy li strong{color:#76551d}
body[data-theme="light"] .guide-link{border-color:#c4a46d;color:#75551d}
body[data-theme="light"] .site-footer{border-color:#dedbd2;color:#68736b}
body[data-theme="light"] .site-footer a{color:#785c28}
@media(max-width:900px){.guide-panel,.guide-panel-how{grid-template-columns:minmax(0,1fr) minmax(290px,.9fr);gap:28px;padding:32px}.guide-copy h2{font-size:36px}}
@media(max-width:620px){.guide-panel,.guide-panel-how{min-height:0;grid-template-columns:1fr;gap:22px;margin-top:18px;padding:23px 19px;border-radius:11px}.guide-panel-how .guide-art{order:0}.guide-copy h2{font-size:32px}.guide-copy>p:not(.tools-kicker){font-size:14px}.guide-copy ul,.guide-copy ol{gap:10px;margin:16px 0 21px;font-size:13px}.guide-art svg{max-height:290px}.site-footer{width:calc(100% - 32px);align-items:flex-start;flex-direction:column;justify-content:center;gap:7px;padding:13px 0 18px;font-size:10px}}

.privacy-main{max-width:860px;padding-top:44px;padding-bottom:58px}
.privacy-main h1{margin:0 0 9px;color:#f0f2f5;font:500 clamp(34px,5vw,50px)/1.08 Georgia,"Times New Roman",serif;letter-spacing:-.03em}
.privacy-updated{margin:0 0 34px;color:#8f9bab;font-size:13px}
.privacy-main section{padding:22px 0;border-top:1px solid #303a47}
.privacy-main section h2{margin:0 0 12px;color:#e9edf2;font:500 22px Georgia,"Times New Roman",serif}
.privacy-main section p{margin:0 0 12px;color:#b4bfcc;font-size:14px;line-height:1.75}
.privacy-main section p:last-child{margin-bottom:0}
.privacy-main section strong{color:#edf0f4}
.privacy-main a{color:#e3bd73;text-underline-offset:3px}
.privacy-main a:hover{color:#f4d08f}
body[data-theme="light"] .privacy-main h1,body[data-theme="light"] .privacy-main section h2{color:#18231d}
body[data-theme="light"] .privacy-updated{color:#68736b}
body[data-theme="light"] .privacy-main section{border-color:#dedbd2}
body[data-theme="light"] .privacy-main section p{color:#47544b}
body[data-theme="light"] .privacy-main section strong{color:#202c24}
body[data-theme="light"] .privacy-main a{color:#75551d}
@media(max-width:600px){.privacy-main{padding-top:30px;padding-bottom:40px}.privacy-main section{padding:18px 0}.privacy-main section h2{font-size:20px}.privacy-main section p{font-size:13px}}