:root{color:#16213a;background:#f8fcff;font-family:Fredoka,Trebuchet MS,Arial,sans-serif;line-height:1.55}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:linear-gradient(160deg,#f8fcff 0%,#eaf7ff 48%,#fff5cc 100%);min-width:320px;min-height:100vh;margin:0;overflow-x:hidden}body:before,body:after{content:"";z-index:-1;pointer-events:none;position:fixed;inset:0}body:before{opacity:.5;background-image:radial-gradient(#6c92ff 1.5px,#0000 1.5px),radial-gradient(#ffb84d 1.5px,#0000 1.5px);background-position:0 0,34px 48px;background-size:92px 92px,126px 126px;animation:24s linear infinite star-drift}body:after{background:linear-gradient(120deg,#0000 0 42%,#ffffff80 46%,#0000 50% 100%);animation:11s ease-in-out infinite soft-shine;transform:translate(-60%)}a{color:inherit}button,input{font:inherit}button{color:#fff;cursor:pointer;background:#226ed8;border:2px solid #226ed8;border-radius:999px;min-height:44px;padding:.72rem 1.05rem;font-weight:700;transition:transform .2s,box-shadow .2s,background .2s}button:hover:not(:disabled),button:focus-visible{background:#1559b4;transform:translateY(-2px)scale(1.02);box-shadow:0 10px 22px #226ed838}button:disabled{cursor:not-allowed;opacity:.55}input{color:#17223c;background:#ffffffd1;border:2px solid #9dc3f7;border-radius:999px;min-width:0;min-height:44px;padding:.68rem .9rem}button:focus-visible,input:focus-visible,a:focus-visible{outline-offset:3px;outline:3px solid #ffca3a}.skip-link{z-index:10;color:#071125;background:#fff;border-radius:999px;padding:.5rem .8rem;position:absolute;top:.5rem;left:-999px}.skip-link:focus{left:.5rem}.site-header{justify-content:space-between;align-items:center;gap:1rem;width:min(1120px,92%);margin:0 auto;padding:1.15rem 0;display:flex}.brand{color:#1a4ea3;white-space:nowrap;font-size:clamp(1.45rem,4vw,2.2rem);font-weight:700;text-decoration:none;position:relative}.brand:after{content:"";transform-origin:0;background:#ffca3a;border-radius:999px;height:.32rem;animation:.8s both underline-pop;position:absolute;bottom:-.28rem;left:.05rem;right:.05rem}.site-header nav{flex-wrap:wrap;justify-content:flex-end;gap:.55rem;display:flex}.site-header nav a{color:#284369;border:2px solid #0000;border-radius:999px;min-height:40px;padding:.55rem .85rem;font-weight:700;text-decoration:none;transition:transform .2s,background .2s,border-color .2s}.site-header nav a:hover,.site-header nav a:focus-visible{transform:translateY(-2px)}.site-header nav a.active{color:#1559b4;background:#fff;border-color:#226ed8;box-shadow:0 8px 18px #226ed824}main,footer{width:min(1040px,92%);margin:0 auto}.page{min-height:calc(100vh - 104px);padding:clamp(2rem,5vw,4.75rem) 0 3rem}.page[hidden]{display:none}.active-page{animation:.46s both page-rise}.section-heading{justify-content:space-between;align-items:flex-start;gap:1rem;margin-bottom:1.4rem;display:flex}.eyebrow{color:#c04b82;letter-spacing:.08em;text-transform:uppercase;margin:0 0 .3rem;font-size:.86rem;font-weight:700}.page h2{color:#143771;max-width:790px;margin:0;font-size:clamp(2.35rem,8vw,5.7rem);font-weight:700;line-height:.95}.page-intro,.description,.chat-section>p:not(.eyebrow){color:#415778;max-width:760px;font-size:clamp(1.03rem,2vw,1.2rem)}.controls,.chat-controls{flex-wrap:wrap;align-items:center;gap:.65rem;display:flex}.controls{margin:1.5rem 0 .4rem}.controls label{font-weight:700}.status{color:#198f61;min-height:1.5rem;font-weight:700}.apod-story{max-width:920px;margin-top:1rem}.apod-story h3,.favorite-item h3{color:#152b55;margin:.25rem 0;font-size:clamp(1.5rem,4vw,2.45rem);line-height:1.1}.date,.credit{color:#60769a;font-size:.98rem;font-weight:600}.space-image,.favorite-item img{object-fit:cover;border:4px solid #fff;border-radius:1.3rem;width:100%;margin:1rem 0;display:block;box-shadow:0 18px 42px #375b9438}.space-image{max-height:640px;animation:1.1s both float-in}.favorite-item img{aspect-ratio:4/3}.description{white-space:pre-line}.media-link{color:#1559b4;margin:1rem 0;font-weight:700;display:inline-block}.gallery{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));align-items:start;gap:1.5rem;display:grid}.favorite-item{animation:.55s both float-in}.favorite-item:nth-child(2n){animation-delay:80ms}.favorite-item:nth-child(3n){animation-delay:.16s}.secondary-button{color:#a72e68;background:#fff;border-color:#c04b82;margin-top:.5rem}.secondary-button:hover:not(:disabled),.secondary-button:focus-visible{background:#ffe6f1;box-shadow:0 10px 22px #c04b822e}.empty-state,.loading{color:#4f6688;font-size:1.12rem;font-weight:600}.loading{animation:1.4s ease-in-out infinite gentle-pulse}.error{color:#87223a;background:#ffe8ee;border-left:6px solid #d8325b;border-radius:.85rem;max-width:760px;padding:1rem}.chat-controls{margin-top:1.25rem}.chat-controls input{flex:250px}.chat-answer{color:#2f4569;border-left:6px solid #ffca3a;max-width:760px;margin-top:1.25rem;padding-left:1rem;font-size:1.15rem;animation:.45s both float-in}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}@keyframes page-rise{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}@keyframes float-in{0%{opacity:0;transform:translateY(18px)scale(.98)}to{opacity:1;transform:translateY(0)scale(1)}}@keyframes gentle-pulse{0%,to{opacity:.55}50%{opacity:1}}@keyframes star-drift{0%{background-position:0 0,34px 48px}to{background-position:92px 92px,160px 174px}}@keyframes soft-shine{0%,55%,to{transform:translate(-60%)}72%{transform:translate(60%)}}@keyframes underline-pop{0%{transform:scaleX(0)}to{transform:scaleX(1)}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}@media (width<=680px){.site-header,.section-heading{flex-direction:column;align-items:flex-start}.site-header nav{justify-content:flex-start}.page{padding-top:2rem}.section-heading button,.controls>*,.chat-controls button{width:100%}}