@charset "UTF-8";
:root{color-scheme:light;--paper:#f4f1e8;--card:#fffdf8;--ink:#253b34;--muted:#68766d;--green:#315b4b;--line:#d9ded2;--orange:#d37750;--pale:#e5eadf;--serif:Georgia,"Noto Serif SC","Songti SC",serif;--sans:system-ui,-apple-system,"Segoe UI","Noto Sans SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);line-height:1.75}a{color:inherit;text-decoration:none}a:focus-visible{outline:3px solid var(--orange);outline-offset:4px}.skip-link{position:absolute;left:-9999px;top:1rem;background:var(--card);padding:.6rem 1rem;z-index:5}.skip-link:focus{left:1rem}.site-header{max-width:1180px;margin:auto;padding:1.25rem 2rem;display:flex;align-items:center;justify-content:space-between;gap:2rem;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:.7rem;font-weight:800;letter-spacing:.04em;font-size:1.05rem}.brand small{display:block;color:var(--muted);font-size:.68rem;letter-spacing:.14em;font-weight:500}.brand-mark{display:grid;place-items:center;width:2.7rem;height:2.7rem;border-radius:50% 50% 45% 45%;background:var(--green);color:#fff;font-family:var(--serif);font-size:1.35rem}.site-nav{display:flex;align-items:center;gap:clamp(.8rem,2.2vw,2rem);font-size:.92rem}.site-nav a{color:var(--muted);padding:.4rem 0;border-bottom:2px solid transparent}.site-nav a:hover,.site-nav a[aria-current=page]{color:var(--green);border-color:var(--orange)}.hero,.section-block,.note-banner,.page-wrap{max-width:1180px;margin:0 auto}.hero{padding:clamp(3rem,8vw,7rem) 2rem;display:grid;grid-template-columns:1.1fr .9fr;gap:3rem;align-items:center}.eyebrow,.card-kicker{margin:0 0 .85rem;color:var(--orange);font-size:.73rem;font-weight:800;letter-spacing:.16em;text-transform:uppercase}.hero h1,.article h1,.not-found h1{font-family:var(--serif);font-weight:600;letter-spacing:.015em;line-height:1.28}.hero h1{font-size:clamp(2.5rem,5vw,4.6rem);margin:.2rem 0 1.2rem}.hero-lead{max-width:38rem;color:var(--muted);font-size:1.08rem}.button-link{display:inline-flex;gap:.9rem;align-items:center;margin-top:1rem;padding:.78rem 1.15rem;background:var(--green);color:white;border-radius:2px;font-weight:650}.button-link:hover{background:#244639}.hero-art{height:340px;position:relative;overflow:hidden;background:#e4e9de;border-radius:46% 54% 42% 58%/55% 40% 60% 45%}.sun{position:absolute;left:27%;top:18%;width:130px;height:130px;border-radius:50%;background:#df9a62;box-shadow:0 0 0 22px #df9a6222,0 0 0 50px #df9a6211}.orbit{position:absolute;left:9%;top:39%;width:82%;height:28%;border:1px solid #64817188;border-radius:50%;transform:rotate(-25deg)}.orbit-two{top:32%;transform:rotate(27deg);border-color:#64817155}.paper{position:absolute;right:18%;bottom:9%;width:118px;height:156px;background:#fffdf8;box-shadow:10px 10px 0 #c5d0c0;transform:rotate(8deg);border-radius:2px}.paper:after{content:"";display:block;margin:35px 20px;width:72px;height:56px;border-top:1px solid #c8d0c4;border-bottom:1px solid #c8d0c4;background:repeating-linear-gradient(to bottom,transparent 0 13px,#c8d0c4 14px)}.paper-two{right:39%;bottom:13%;width:90px;height:120px;transform:rotate(-9deg);background:#f8f4e9}.art-caption{position:absolute;left:10%;bottom:11%;font-family:var(--serif);font-size:1.2rem;line-height:1.45;color:var(--green)}.section-block{padding:1.5rem 2rem 5rem}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:2rem;margin-bottom:1.4rem}.section-heading h2,.note-banner h2,.article h2{font-family:var(--serif);font-weight:600}.section-heading h2{font-size:2rem;margin:.1rem 0}.section-heading>p{max-width:23rem;color:var(--muted)}.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem}.topic-card{display:flex;flex-direction:column;min-height:245px;padding:1.25rem;background:var(--card);border:1px solid var(--line);transition:transform .18s ease,border-color .18s ease}.topic-card:hover{transform:translateY(-4px);border-color:#8da592}.topic-card strong{font-family:var(--serif);font-size:1.25rem;line-height:1.45}.topic-card>span:not(.card-kicker):not(.card-link){margin-top:.7rem;color:var(--muted);font-size:.9rem}.card-kicker{font-size:.67rem}.card-link{margin-top:auto;padding-top:1rem;color:var(--green);font-size:.84rem;font-weight:700}.note-banner{margin:0 auto 5rem;padding:2rem;display:flex;gap:1.5rem;align-items:start;background:#e6eadf}.note-icon{display:grid;place-items:center;flex:0 0 3rem;height:3rem;border-radius:50%;background:#fffdf8;color:var(--orange);font-size:1.5rem}.note-banner h2{margin:.1rem 0;font-size:1.45rem}.note-banner p:last-child{margin-bottom:0;color:var(--muted)}.page-wrap{padding:clamp(2.5rem,7vw,5rem) 2rem 6rem}.article{max-width:760px;margin:0 auto}.article h1{font-size:clamp(2.25rem,5vw,3.6rem);margin:.2rem 0 .85rem}.article-lead{font-family:var(--serif);font-size:1.25rem;color:var(--muted);line-height:1.65;margin:0 0 3rem}.article h2{font-size:1.55rem;margin:2.5rem 0 .65rem}.article h3{margin:.1rem 0 .3rem;font-size:1.05rem}.article p,.article li{color:#4e5f56}.article p{margin:.75rem 0 1rem}.article ul,.article ol{padding-left:1.35rem}.article li{padding:.18rem 0}.callout{margin:1.5rem 0;padding:1.35rem 1.5rem;background:var(--card);border-left:3px solid var(--orange)}.callout ol,.callout ul{margin:.6rem 0 0}.callout li{margin:.25rem 0}.steps{display:grid;gap:.75rem;margin:1.4rem 0}.steps section{display:flex;gap:1rem;padding:1rem;background:var(--card);border:1px solid var(--line)}.steps section>span{font-family:var(--serif);color:var(--orange);font-size:1.35rem}.steps p{margin:.1rem 0 0}.observation{display:grid;grid-template-columns:repeat(3,1fr);gap:.8rem;margin:1.5rem 0}.observation>div{display:grid;justify-items:center;gap:.25rem;padding:1.1rem .5rem;background:var(--card);border:1px solid var(--line);text-align:center}.observation small{color:var(--muted)}.moon{display:block;width:52px;height:52px;border-radius:50%;background:#d99b62;margin:.2rem 0 .6rem}.moon-new{background:var(--green);box-shadow:inset 0 0 0 2px #fffdf8}.moon-quarter{background:linear-gradient(90deg,#d99b62 50%,var(--green) 50%)}.moon-full{background:#d99b62}.closing-line{padding-top:1rem;border-top:1px solid var(--line);font-family:var(--serif);font-size:1.1rem}.site-footer{max-width:1180px;margin:auto;padding:1.5rem 2rem 2.5rem;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:.65rem 1.5rem;color:var(--muted);font-size:.82rem}.site-footer a{color:var(--green);font-weight:800}.not-found{min-height:60vh;display:flex;flex-direction:column;align-items:flex-start;justify-content:center}.not-found h1{font-size:clamp(2.3rem,5vw,3.7rem);margin:.2rem 0}.not-found>p:not(.eyebrow){color:var(--muted)}
@media(max-width:850px){.card-grid{grid-template-columns:repeat(2,1fr)}.hero{gap:2rem}.hero-art{height:290px}.site-header{padding-inline:1.25rem}}
@media(max-width:600px){.site-header{align-items:flex-start;flex-direction:column;gap:.8rem}.site-nav{width:100%;justify-content:space-between;gap:.35rem;font-size:.83rem}.site-nav a{padding:.25rem 0}.hero{padding:3rem 1.25rem 3.5rem;grid-template-columns:1fr;gap:1.8rem}.hero h1{font-size:2.6rem}.hero-art{height:230px}.section-block{padding-inline:1.25rem}.section-heading{display:block}.section-heading>p{margin:.4rem 0}.card-grid{grid-template-columns:1fr}.topic-card{min-height:190px}.note-banner{margin-inline:1.25rem;margin-bottom:3rem;padding:1.3rem;gap:.85rem}.page-wrap{padding:3rem 1.25rem 4rem}.article-lead{margin-bottom:2rem}.observation{gap:.45rem}.observation>div{font-size:.82rem;padding:.8rem .35rem}.moon{width:42px;height:42px}.site-footer{padding-inline:1.25rem;flex-direction:column;gap:.3rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important}}