:root{color-scheme:light;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#20242b;background:#fff}*{box-sizing:border-box}body{margin:0;line-height:1.6}a{color:#0858a8}.container{width:min(100% - 32px,980px);margin:auto}.skip{position:absolute;left:-9999px}.skip:focus{left:16px;top:8px;background:#fff;z-index:2}.site-header{border-bottom:1px solid #d9dfe7;background:#f7f9fc}.header-row{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:16px 0}.brand{display:inline-flex;align-items:center;gap:8px;font-weight:700;color:#20242b;text-decoration:none;white-space:nowrap}.site-header nav,.site-footer nav{display:flex;gap:16px;flex-wrap:wrap}.site-header nav a{text-decoration:none;white-space:nowrap}.disclosure{border-left:4px solid #c2691c;background:#fff7ec;padding:12px 16px;margin:24px 0 0}.hero{padding:40px 0 20px}.eyebrow{font-size:13px;font-weight:700;text-transform:uppercase;color:#555}.hero h1{font-size:36px;line-height:1.15;margin:8px 0 16px;overflow-wrap:anywhere}.lead{font-size:18px;max-width:720px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.button{display:inline-flex;align-items:center;min-height:44px;background:#1264b2;color:#fff;padding:9px 16px;text-decoration:none;font-weight:650;border-radius:4px}.button--quiet{background:#edf3fa;color:#17446c}.section{padding:24px 0;border-top:1px solid #e2e6eb}.section h2{font-size:22px;margin:0 0 10px}.section p{margin:0;max-width:780px}.link-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px}.link-grid a{border:1px solid #d6dde6;padding:12px;text-decoration:none;border-radius:4px}.source{font-size:14px}.site-footer{border-top:1px solid #d9dfe7;background:#f7f9fc;padding:24px 0}.site-footer p{display:flex;align-items:center;gap:8px;margin:0 0 12px}@media(max-width:750px){.header-row{display:block}.site-header nav{padding-top:12px;gap:8px 14px}.hero{padding-top:28px}}@media(max-width:480px){.hero h1{font-size:28px}}@media(prefers-reduced-motion:no-preference){a{transition:color .15s,background-color .15s}}
.brand img,.site-footer img{border-radius:4px}.brand small{font-size:12px;font-weight:500;color:#526374}.hero-benefits{display:flex;flex-wrap:wrap;gap:8px 18px;list-style:none;padding:0;margin:22px 0 0;color:#166374;font-size:14px;font-weight:650}.hero-benefits li::before{content:"✓";margin-right:6px}.section-download{display:inline-flex;align-items:center;gap:7px;margin-top:14px;font-weight:700}.hero-actions .button{justify-content:center}.button:hover,.button:focus-visible{background:#0c518f;color:#fff}.button--quiet:hover,.button--quiet:focus-visible{background:#dcecf8;color:#17446c}
@media(max-width:600px){.header-row{display:flex;flex-wrap:wrap;gap:8px;padding:10px 0}.site-header nav{width:100%;padding:0;gap:8px 16px}.disclosure{margin-top:12px;padding:8px 12px;font-size:13px}.hero{padding-top:22px}.hero h1{font-size:29px}.hero-actions{gap:9px}.hero-actions .button{flex:1 1 100%;text-align:center}.hero-benefits{gap:6px 14px;margin-top:16px}}

.nasa-header-action{display:inline-flex;flex-direction:column;align-items:center;justify-content:center;min-height:48px;padding:6px 14px;background:#17684f;color:#fff;text-decoration:none;border-radius:4px;font-size:14px;font-weight:700;line-height:1.3;white-space:nowrap}.nasa-header-action small{font-size:12px;font-weight:500;margin-top:2px}.nasa-header-action:hover,.nasa-header-action:focus-visible,.button--nasa:hover,.button--nasa:focus-visible{background:#104e3b;color:#fff}.nasa-access>.eyebrow{margin:0 0 6px}.nasa-access-actions{display:flex;align-items:flex-start;gap:16px;margin-top:20px}.button--nasa{background:#17684f;flex-shrink:0;justify-content:center}.nasa-access-terms{font-size:14px;color:#475569;max-width:400px}a:focus-visible{outline:3px solid #0b4d8c;outline-offset:3px}.site-header nav a{display:inline-flex;align-items:center;min-height:44px}
@media(max-width:750px){.header-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px 12px;align-items:center}.site-header nav{grid-column:1 / -1;grid-row:2;justify-content:space-between;padding:0;gap:8px}.brand{min-width:0;white-space:normal}.brand span{line-height:1.3}.nasa-header-action{grid-column:2;grid-row:1}.nasa-access-actions{flex-direction:column;gap:12px}}
@media(max-width:390px){.brand{font-size:14px;gap:6px}.brand img{width:28px;height:28px}.brand small{font-size:11px}.nasa-header-action{padding:6px 10px}.button--nasa{width:100%;font-size:15px}.nasa-access h2{font-size:21px}}

.breadcrumbs{margin:18px 0 0;font-size:13px;color:#526374;overflow-wrap:anywhere}.contents{padding:0 0 20px}.contents ul{margin:0;padding-left:22px}.contents a{display:inline-block;padding:5px 0}.section[id]{scroll-margin-top:20px}

.steps,.guide-list{max-width:780px;margin:16px 0 0;padding-left:24px}.steps li,.guide-list li{padding:4px 0 4px 4px}.guide-note{border-left:3px solid #bb7b24;padding:10px 14px;background:#fff9ee;margin-top:16px!important}.guide-table{max-width:900px;margin-top:18px}.guide-table table{border-collapse:collapse;width:100%;text-align:left;font-size:15px}.guide-table caption{text-align:left;font-weight:650;padding-bottom:10px}.guide-table th,.guide-table td{padding:12px;border-bottom:1px solid #d9dfe7;vertical-align:top}.guide-table thead{background:#edf3fa}.guide-table td{overflow-wrap:anywhere}.guide-figure{max-width:780px;margin:24px 0 0}.guide-figure img{display:block;width:100%;height:auto}.guide-figure figcaption{font-size:13px;color:#526374;margin-top:8px}.guide-code{max-width:780px;white-space:pre-wrap;overflow-wrap:anywhere;background:#f1f5f9;padding:14px;border-left:3px solid #1264b2}.source-links{padding-left:22px}.source-links li{padding:4px 0}.checked-date{margin-top:12px!important;color:#526374}
@media(max-width:600px){.guide-table table,.guide-table tbody,.guide-table tr,.guide-table td{display:block}.guide-table thead{display:none}.guide-table tr{padding:10px 0;border-top:1px solid #d9dfe7}.guide-table td{border:0;padding:4px 0}.guide-table td::before{content:attr(data-label) ": ";font-weight:650}.steps,.guide-list{padding-left:22px}.guide-code{font-size:14px}}
@media(max-width:600px){.guide-table thead{display:table-header-group;position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}}