/* ===== Tokens: light by default; dark via OS setting or the toggle (data-theme) ===== */
:root{
  --bg:#ffffff; --surface:#f4f6fb; --surface-2:#e8edf8; --fg:#141c33; --muted:#535f78; --line:#dfe4ef;
  --accent:#1659d6; --accent-fg:#ffffff; --accent-soft:#e7eefd; --good:#0f7a4d; --warn-bg:#fff6e0; --warn-line:#e7b54a;
  --shadow:0 1px 2px rgba(16,24,40,.06),0 6px 20px rgba(16,24,40,.07);
  --radius:12px; --wrap:1200px;
  --font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,"Times New Roman",serif;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme=light]){
    --bg:#080d1c; --surface:#0f1730; --surface-2:#17213f; --fg:#e6ecf8; --muted:#97a5c0; --line:#222e4f;
    --accent:#7fb2ff; --accent-fg:#06101f; --accent-soft:#16244a; --good:#58d6a0; --warn-bg:#2b2410; --warn-line:#a3842e;
    --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.35);
  }
}
:root[data-theme=dark]{
  --bg:#080d1c; --surface:#0f1730; --surface-2:#17213f; --fg:#e6ecf8; --muted:#97a5c0; --line:#222e4f;
  --accent:#7fb2ff; --accent-fg:#06101f; --accent-soft:#16244a; --good:#58d6a0; --warn-bg:#2b2410; --warn-line:#a3842e;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.35);
}

/* ===== Base ===== */
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.7 var(--font);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto}
a{color:var(--accent);text-underline-offset:3px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:4px}
h1,h2,h3{line-height:1.25;color:var(--fg)}
h1{font:700 clamp(1.9rem,3.2vw,2.6rem)/1.15 var(--serif);letter-spacing:-.01em;margin:.2rem 0 .6rem}
h2{font:700 1.55rem/1.25 var(--serif);margin:2rem 0 .6rem}
h3{font-size:1.2rem;margin:1.6rem 0 .4rem}
p{margin:.8rem 0}
.lead{font-size:1.2rem;color:var(--muted);max-width:60ch}
.muted{color:var(--muted)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;background:var(--bg);color:var(--fg);padding:8px 12px;z-index:200;border-radius:8px;box-shadow:var(--shadow)}

.btn,button{font:inherit;cursor:pointer}
.btn,button[type=submit],button#preset,button#reset{background:var(--accent);color:var(--accent-fg);border:1px solid var(--accent);border-radius:999px;padding:.55rem 1.15rem;font-weight:600;text-decoration:none;display:inline-block;transition:transform .12s,box-shadow .12s}
.btn:hover,button[type=submit]:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.btn.alt,button.alt{background:transparent;color:var(--accent);border:1px solid var(--accent)}
.linklike{background:none;border:0;padding:0;color:var(--accent);text-decoration:underline;font:inherit;cursor:pointer}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:100;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.bar{max-width:var(--wrap);margin:0 auto;padding:10px 20px;display:flex;align-items:center;gap:16px}
.brand{display:flex;align-items:center;flex:none}
.brand img{height:32px;width:auto;display:block}
:root[data-theme=dark] .brand img{filter:brightness(1.7) saturate(.85)}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .brand img{filter:brightness(1.7) saturate(.85)}}
.primary{margin-left:auto}
.primary ul{list-style:none;margin:0;padding:0}
.primary>ul{display:flex;gap:2px;align-items:center}
.primary a,.sub-toggle{color:var(--fg);text-decoration:none;font:500 .95rem var(--font);padding:.5rem .7rem;white-space:nowrap;border-radius:8px;display:flex;align-items:center;gap:6px;background:none;border:0}
.primary a:hover,.sub-toggle:hover,.has-sub.open>.sub-toggle{background:var(--surface-2)}
.primary a[aria-current=page]{color:var(--accent);font-weight:700}
.sub-toggle svg{transition:transform .15s;opacity:.7}
.has-sub.open>.sub-toggle svg{transform:rotate(180deg)}
.has-sub{position:relative}
.sub{position:absolute;left:0;top:calc(100% + 6px);min-width:230px;background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:6px;display:none}
.sub a{padding:.45rem .7rem;border-radius:8px;font-weight:450}
/* Invisible bridge across the gap so the menu stays open while the pointer moves down to it */
.sub::before{content:"";position:absolute;left:0;right:0;top:-10px;height:10px}
/* Last menu (About) opens leftwards so it never runs off the right edge */
.primary>ul>.has-sub:last-child>.sub{left:auto;right:0}
@media (hover:hover) and (min-width:1061px){
  .has-sub:hover>.sub,.has-sub:focus-within>.sub{display:block}
  .has-sub:hover>.sub-toggle svg{transform:rotate(180deg)}
}
.has-sub.open>.sub{display:block}
.theme-toggle,.nav-toggle{flex:none;width:40px;height:40px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--fg);display:grid;place-items:center;padding:0}
.theme-toggle:hover,.nav-toggle:hover{background:var(--surface-2)}
.theme-toggle .i-sun{display:none}
.theme-toggle[data-mode=dark] .i-sun{display:block}
.theme-toggle[data-mode=dark] .i-moon{display:none}
.nav-toggle{display:none}
@media (max-width:1060px){
  .nav-toggle{display:grid}
  .js .primary{display:none;position:absolute;left:0;right:0;top:100%;background:var(--bg);border-bottom:1px solid var(--line);box-shadow:var(--shadow);max-height:calc(100vh - 64px);overflow:auto;margin:0;padding:8px 12px}
  .js .primary.open{display:block}
  .primary>ul{flex-direction:column;align-items:stretch}
  .sub{position:static;box-shadow:none;border:0;border-left:2px solid var(--line);border-radius:0;margin:0 0 6px 14px;padding:2px 0 2px 6px;min-width:0}
  html:not(.js) .sub{display:block}
  .theme-toggle{margin-left:auto}
}

/* ===== Page layout (main + sidebar) ===== */
.layout{max-width:var(--wrap);margin:0 auto;padding:22px 20px 0;display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:48px;align-items:start}
.layout.full{grid-template-columns:minmax(0,1fr)}
@media (max-width:1000px){.layout{grid-template-columns:minmax(0,1fr);gap:32px}}
.content{min-width:0}
.sidebar{display:grid;gap:18px;align-content:start}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 16px 12px}
.side-card h2{font:700 1.1rem var(--serif);margin:0 0 10px;padding-bottom:8px;border-bottom:2px solid var(--accent);display:inline-block}
.side-card p{margin:.3rem 0}
.side-card .btn{display:block;text-align:center}
.latest,.plain{list-style:none;margin:0;padding:0}
.latest li{padding:12px 0;border-top:1px solid var(--line)}
.latest li:first-child{border-top:0;padding-top:4px}
.latest a{text-decoration:none;color:var(--fg);display:block}
.latest img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:10px;display:block;margin-bottom:8px;background:var(--surface-2)}
.latest .t{font-weight:650;line-height:1.35;display:block}
.latest a:hover .t{color:var(--accent);text-decoration:underline}
.latest p{font-size:.88rem;color:var(--muted);line-height:1.5;margin:.3rem 0 0}
.plain li{padding:.3rem 0}
.plain a{text-decoration:none}
.plain a:hover{text-decoration:underline}

/* ===== Footer ===== */
.site-footer{margin-top:56px;background:var(--surface);border-top:1px solid var(--line)}
.foot{max-width:var(--wrap);margin:0 auto;padding:24px 20px 40px;color:var(--muted);font-size:.88rem}

/* ===== Content ===== */
.crumbs{margin:.2rem 0 0;font-size:.9rem}
.hero{display:block;width:auto;max-width:100%;height:auto;margin:.8rem 0 1.2rem;border-radius:var(--radius);box-shadow:var(--shadow)}
.prose{max-width:74ch}
.prose h2{margin-top:2.2rem}
.prose img{border-radius:10px}
.prose table{display:block;overflow-x:auto}
.prose ul,.prose ol{padding-left:1.4rem}
.prose li{margin:.25rem 0}
.prose blockquote{margin:1rem 0;padding:.2rem 1rem;border-left:4px solid var(--accent);background:var(--accent-soft);border-radius:0 8px 8px 0}
.related{border-top:1px solid var(--line);margin-top:2rem}

.pillars{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:18px;margin:0 0 .6rem}
.more-guides{margin:.4rem 0 1.4rem;font-weight:600}
.home-sub{margin:1.8rem 0 .3rem}
.home-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;margin:1rem 0 2rem}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px}
.card h2{margin:0 0 .5rem;font-size:1.25rem}
.top{margin:0;padding-left:1.4rem;columns:2}
.top li{padding:.1rem 0;break-inside:avoid}

/* ===== Tables ===== */
table{border-collapse:collapse;width:100%}
caption{text-align:left;font-weight:700;padding:6px 0;font-family:var(--serif);font-size:1.1rem}
td,th{padding:7px 8px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}


/* ===== Search tools ===== */
.filters{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin:1rem 0}
fieldset{border:0;margin:0 0 12px;padding:0}
legend{font-weight:700;margin-bottom:6px}
.row{display:flex;flex-wrap:wrap;gap:12px 20px;align-items:end}
.row label{font-size:.92rem}
.row select,.row input[type=search],.contact input,.contact select,.contact textarea{font:inherit;padding:.45rem .6rem;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--fg)}
.row select,.row input[type=search]{margin-left:4px}
.check{display:flex;align-items:center;gap:6px}
input[type=checkbox]{accent-color:var(--accent);width:1.05rem;height:1.05rem}
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius)}
.results thead th{background:var(--surface);position:sticky;top:0}
.results th[data-sort]{cursor:pointer;white-space:nowrap;user-select:none}
.results th[aria-sort=ascending]::after{content:" \25B2";font-size:.7em;color:var(--accent)}
.results th[aria-sort=descending]::after{content:" \25BC";font-size:.7em;color:var(--accent)}
.results tbody th{font-weight:600}
.results td{text-align:center}
.results tbody tr:hover{background:var(--accent-soft)}

/* ===== Contact + consent ===== */
.contact{display:grid;gap:14px;max-width:560px}
.contact label{display:grid;gap:4px;font-weight:600}
.hp{position:absolute;left:-9999px;height:0;overflow:hidden}
#consent{position:fixed;left:16px;right:16px;bottom:16px;max-width:760px;margin:0 auto;z-index:150;background:var(--bg);color:var(--fg);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:flex-end;box-shadow:var(--shadow)}
#consent p{margin:0;flex:1 1 300px;font-size:.92rem}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
#consent button{background:var(--accent);color:var(--accent-fg);border:1px solid var(--accent);border-radius:999px;padding:.45rem 1.1rem;font-weight:600}
#consent button.alt{background:transparent;color:var(--accent)}
.byline{font-size:.9rem;margin:.1rem 0 .6rem}
.byline a{color:inherit}
.small-note{font-size:.9rem;margin:.2rem 0 .8rem}
.hero-fig{margin:.8rem 0 1.2rem}
.hero-fig .hero{margin:0 0 .35rem}
.hero-fig figcaption{font-size:.8rem;color:var(--muted)}

/* ===== Astro-Observer components ===== */
/* Home hero: wide crop of the photo with the heading over a dark fade (the photo is dark in both themes). */
.home-hero{position:relative;margin:.4rem 0 1.4rem;overflow:hidden;border-radius:var(--radius);background:#050914;box-shadow:var(--shadow);color:#fff}
.home-hero img{display:block;width:100%;height:auto;aspect-ratio:1024/434;object-fit:cover}
.home-hero::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(4,8,20,.78) 0,rgba(4,8,20,.45) 38%,rgba(4,8,20,0) 62%);pointer-events:none}
.home-hero-text{position:absolute;z-index:1;left:0;top:0;bottom:0;max-width:52%;padding:1.4rem 1.6rem;display:flex;flex-direction:column;justify-content:center}
.home-hero h1{margin:0 0 .5rem;color:#fff;font-size:clamp(1.6rem,4vw,2.8rem)}
.home-hero .lead{margin:0;color:#e3e9f7;font-size:clamp(.95rem,1.8vw,1.15rem);line-height:1.5}
/* Phones: show the whole picture, with the heading underneath instead of on top */
@media (max-width:640px){
  .home-hero::before{display:none}
  .home-hero-text{position:static;max-width:none;padding:1rem 1.1rem 1.2rem}
}
.season-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:14px;margin:1rem 0 2rem}
.home-intro{border-top:1px solid var(--line);padding-top:.6rem}

/* Key facts under a page title (Messier objects, constellations, star parties) */
.facts{display:flex;flex-wrap:wrap;gap:10px;margin:.6rem 0 1rem;padding:0}
.facts div{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:.45rem .8rem;min-width:120px}
.facts dt{font-size:.75rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}
.facts dd{margin:0;font-weight:600}
.notice{background:var(--warn-bg);border:1px solid var(--warn-line);border-radius:10px;padding:.7rem 1rem;font-size:.95rem}

/* Generated lists on hub pages */
.hub{margin-top:2.4rem;border-top:1px solid var(--line)}
.chips{list-style:none;margin:.4rem 0 1rem;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.chips a{display:inline-block;padding:.25rem .75rem;border:1px solid var(--line);border-radius:999px;background:var(--surface);text-decoration:none;font-size:.95rem}
.chips a:hover{border-color:var(--accent);background:var(--accent-soft)}
.chips.big a{font-weight:600;padding:.4rem 1rem}
.list li{padding:.45rem 0;border-top:1px solid var(--line)}
.list li:first-child{border-top:0}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px;margin:1rem 0 1.4rem}
.mini-card{display:flex;flex-direction:column;gap:2px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:10px;text-decoration:none;color:var(--fg)}
.mini-card img{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:8px;margin-bottom:6px;background:#050914}
.mini-card .t{font-weight:650}
.mini-card .muted{font-size:.85rem}
.mini-card:hover{border-color:var(--accent)}
.mini-card:hover .t{color:var(--accent);text-decoration:underline}
.mini-card.season{padding:14px 16px}
.mini-card.season .t{font:700 1.25rem var(--serif)}
.results td,.results th{text-align:left}
.planet-facts{margin:2rem 0 1rem;max-width:640px}
.planet-facts th{font-weight:600;width:45%}
.related .chips{margin-bottom:.6rem}

/* Meteor showers */
.badge{display:inline-block;padding:0 .5rem;border-radius:999px;background:var(--accent);color:var(--accent-fg);font-size:.72rem;font-weight:700;letter-spacing:.03em;vertical-align:middle}
.shower-list{list-style:none;margin:.2rem 0 1rem;padding:0}
.shower-list li{padding:.7rem 0;border-top:1px solid var(--line)}
.shower-list li:first-child{border-top:0}
.shower-list .t{font-weight:700;font-size:1.05rem}
.shower-list .meta{display:block;font-size:.88rem;color:var(--muted)}
.shower-list .sum{display:block;margin-top:.15rem}
.moon-good{color:var(--good);font-weight:600}
.moon-fair{color:inherit}
.moon-poor{color:var(--muted)}
.peaks{margin:1.4rem 0 .6rem}
.peaks h2{margin-top:0}
.sources ul{padding-left:1.2rem;font-size:.92rem}
.pager p{display:flex;flex-wrap:wrap;gap:.4rem 1rem}
.after-hub{margin-top:2.4rem;border-top:1px solid var(--line)}

/* Major showers and stronger-than-usual years */
:root{--gold:#a8650a;--gold-soft:#fff4dc;--gold-line:#e3a43a}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--gold:#f5c35b;--gold-soft:#2a2210;--gold-line:#a37a24}}
:root[data-theme=dark]{--gold:#f5c35b;--gold-soft:#2a2210;--gold-line:#a37a24}
.star{color:var(--gold);font-style:normal}
h1 .star{font-size:.85em}
.badge.stronger{background:var(--gold);color:#fff}
:root[data-theme=dark] .badge.stronger{color:#1b1404}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .badge.stronger{color:#1b1404}}
.badge.possible{background:transparent;color:var(--gold);border:1px solid var(--gold-line)}
.major-note{margin:.2rem 0 .6rem;font-size:.95rem}
.outlook{margin:.8rem 0 1rem;padding:.8rem 1rem;border-radius:var(--radius);border:1px solid var(--gold-line);background:var(--gold-soft)}
.outlook-stronger{border-left:6px solid var(--gold)}
.outlook p{margin:.3rem 0}
.outlook-head{display:flex;flex-wrap:wrap;gap:.5rem;align-items:center}
.shower-list li.is-major{background:var(--surface);border:1px solid var(--line);border-left:5px solid var(--accent);border-radius:10px;padding:.7rem .9rem;margin:.5rem 0}
.shower-list li.has-outlook{background:var(--gold-soft);border:1px solid var(--gold-line);border-left:6px solid var(--gold);border-radius:10px;padding:.8rem .9rem;margin:.6rem 0}
.shower-list li.is-major + li,.shower-list li.has-outlook + li{border-top:0}
.outlook-line{color:var(--gold)}
.results tr.is-major th{font-weight:700}
.highlights{margin:1.4rem 0 1.8rem;padding:1rem 1.1rem;border:1px solid var(--gold-line);border-radius:var(--radius);background:var(--gold-soft)}
.highlights h2{margin:0 0 .6rem}
.hl-list{list-style:none;margin:0 0 .6rem;padding:0}
.hl-list li{display:grid;grid-template-columns:auto 1fr;gap:.15rem .6rem;align-items:baseline;padding:.55rem 0;border-top:1px solid var(--gold-line)}
.hl-list li:first-child{border-top:0}
.hl-list .badge{grid-row:span 3;align-self:start;margin-top:.2rem}
.hl-list .t{font-weight:700}
.hl-list .when{grid-column:2;font-size:.9rem;color:var(--muted)}
.hl-list .sum{grid-column:2}
.hl-sub{margin:.6rem 0 .3rem}
.highlights .chips a{background:var(--bg)}
@media (max-width:560px){.hl-list li{grid-template-columns:1fr}.hl-list .badge{grid-row:auto;justify-self:start}.hl-list .when,.hl-list .sum{grid-column:1}}