/* 02 THE OBSERVATORY — 「近づくほど、知らない顔がある。」
   Rail sections (intro, selector, information) around one full-bleed observation window. */
.observatory{--obs-night:#070b13;--obs-blue:var(--blue,#8ed8ff);--obs-gold:#e6c797;--obs-sun:#f5cb79;--obs-line:var(--line,#ffffff24);--obs-gutter:var(--layout-gutter,clamp(20px,4vw,64px));
  position:relative;padding-block:clamp(96px,10vw,168px) 0;color:var(--white,#ecf1f0)}
.obs-rail{width:100%;max-width:1728px;margin-inline:auto;padding-inline:var(--obs-gutter);box-sizing:border-box}
.observatory :focus-visible{outline:2px solid var(--lime,#d9f56c);outline-offset:5px}
.observatory button{font-family:inherit;-webkit-tap-highlight-color:transparent;touch-action:manipulation}

/* ---------- intro ---------- */
.obs-intro{display:flex;justify-content:space-between;align-items:flex-end;gap:clamp(32px,5vw,96px);margin:clamp(44px,5vw,76px) 0 clamp(34px,4vw,56px)}
.obs-intro .section-kicker{display:block;letter-spacing:.16em}
/* the h2 carries .solar-h2 (the shell sets its size, line-height and breakpoints; this selector must not) */
.obs-intro h2{margin:24px 0 0;color:#f2f6f5;text-shadow:0 3px 40px #02040bcc}
.obs-intro p{color:#adb7c3;font-size:14px;line-height:2.2;margin:0 0 12px;max-width:560px}

/* ---------- selector rail ---------- */
.obs-navigation{display:grid;grid-template-columns:repeat(9,minmax(0,1fr));border-block:1px solid var(--obs-line);position:relative}
.obs-navigation button{appearance:none;border:0;background:none;color:#8d9aab;display:flex;align-items:center;gap:clamp(8px,.8vw,14px);padding:clamp(14px,1.4vw,22px) clamp(8px,.75vw,16px);text-align:left;position:relative;cursor:pointer;min-width:0;transition:background .3s,color .3s}
.obs-navigation button+button{border-left:1px solid #ffffff12}
.obs-nav-disc{position:relative;flex:none;width:clamp(28px,2.7vw,52px);aspect-ratio:1;border-radius:50%;display:grid;place-items:center;transition:transform .5s var(--ease,ease)}
.obs-nav-disc img{width:108%;height:108%;max-width:none;object-fit:contain;display:block;filter:saturate(.82) brightness(.82);transition:filter .3s}
.obs-nav-disc:after{content:'';position:absolute;inset:-6px;border-radius:50%;border:1px solid transparent;transition:border-color .3s,box-shadow .3s}
.obs-nav-text{display:flex;flex-direction:column;min-width:0;line-height:1.3}
.obs-nav-text small{font:400 9px var(--mono);letter-spacing:.16em;color:#8a97a6}
.obs-nav-text b{font:600 clamp(11px,.92vw,16px)/1.35 var(--display);letter-spacing:0;color:#c3ced8;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.obs-nav-text span{font-size:11px;color:#8391a1;white-space:nowrap}
.obs-navigation button:hover{background:linear-gradient(180deg,#8ed8ff0d,transparent 80%)}
.obs-navigation button:hover .obs-nav-disc{transform:translateY(-2px) scale(1.07)}
.obs-navigation button:hover img{filter:none}
.obs-navigation button[aria-pressed=true]{background:linear-gradient(180deg,#8ed8ff17,#8ed8ff03 85%)}
.obs-navigation button[aria-pressed=true]:before{content:'';position:absolute;left:0;right:0;top:-1px;height:2px;background:linear-gradient(90deg,transparent,var(--obs-blue) 30%,var(--obs-blue) 70%,transparent)}
.obs-navigation button[aria-pressed=true] .obs-nav-disc:after{border-color:#8ed8ff8c;box-shadow:0 0 24px #8ed8ff38,inset 0 0 10px #8ed8ff1c}
.obs-navigation button[aria-pressed=true] img{filter:none}
.obs-navigation button[aria-pressed=true] .obs-nav-text b{color:#fff}
.obs-navigation button[aria-pressed=true] .obs-nav-text small{color:var(--obs-blue)}
.obs-navigation button[data-observe=sun][aria-pressed=true]:before{background:linear-gradient(90deg,transparent,var(--obs-sun) 30%,var(--obs-sun) 70%,transparent)}
.obs-navigation button[data-observe=sun][aria-pressed=true] .obs-nav-disc:after{border-color:#f5cb798c;box-shadow:0 0 26px #f5cb7944,inset 0 0 10px #f5cb7922}
.obs-navigation button[data-observe=sun][aria-pressed=true] .obs-nav-text small{color:var(--obs-sun)}

/* ---------- the window ---------- */
.obs-window{position:relative;--obs-inset:max(var(--obs-gutter),calc((100% - 1728px) / 2 + var(--obs-gutter)))}
.obs-stage{position:relative;height:clamp(520px,min(62vw,calc(100svh - var(--header-h,86px) - var(--obs-nav-h,88px))),1180px);overflow:hidden;isolation:isolate;background:#02040a;user-select:none;-webkit-user-select:none}
.obs-sky{position:absolute;inset:0;z-index:0;
  background:radial-gradient(1px 1px at 12% 22%,#dfeaff99,transparent),radial-gradient(1px 1px at 67% 14%,#dfeaff77,transparent),radial-gradient(1.4px 1.4px at 84% 66%,#fff3dcaa,transparent),radial-gradient(1px 1px at 38% 81%,#dfeaff66,transparent),radial-gradient(1px 1px at 52% 40%,#dfeaff55,transparent),
    radial-gradient(ellipse 60% 45% at 30% 30%,#1c2b4a3d,transparent 70%),#02040a;background-size:317px 263px,317px 263px,317px 263px,317px 263px,317px 263px,100% 100%,auto}
.obs-stage.is-near .obs-sky{background:radial-gradient(ellipse 60% 45% at 30% 30%,#1c2b4a26,transparent 70%),url('./planets/sky/milkyway.webp') 75% 58%/360% auto no-repeat,#02040a;opacity:.72}
.obs-stage canvas{position:absolute;inset:0;z-index:1;display:block;width:100%;height:100%;cursor:grab;touch-action:pan-y;opacity:0;transition:opacity 1.1s var(--ease,ease)}
.obs-stage.is-live canvas{opacity:1}
.obs-stage.is-dragging canvas{cursor:grabbing}
.obs-stage canvas:focus-visible{outline:none}
.obs-stage:has(canvas:focus-visible) .obs-hud i{border-color:var(--lime,#d9f56c)}
.obs-poster{position:absolute;left:0;top:0;z-index:2;display:block;max-width:none;pointer-events:none;transform-origin:0 0;opacity:1;transition:opacity .35s ease-out}
.obs-poster.is-hidden{opacity:0}
.obs-stage.is-poster-sun .obs-poster{filter:drop-shadow(0 0 60px #f5a74866) drop-shadow(0 0 140px #f5903a33)}
.obs-sunglow{position:absolute;left:0;top:0;z-index:3;width:clamp(360px,40vw,720px);aspect-ratio:1;margin:calc(clamp(360px,40vw,720px)/-2) 0 0 calc(clamp(360px,40vw,720px)/-2);border-radius:50%;pointer-events:none;opacity:0;
  background:radial-gradient(circle,#ffd9973a 0%,#ffbf6a1c 26%,#ff9a4a08 52%,transparent 70%);mix-blend-mode:screen;will-change:transform,opacity}
.obs-vignette{position:absolute;inset:0;z-index:3;pointer-events:none;
  background:radial-gradient(ellipse 78% 72% at 50% 50%,transparent 55%,#02040a8c 100%),linear-gradient(180deg,var(--obs-night) 0,#070b1300 13%,#070b1300 84%,var(--obs-night) 100%)}
.obs-hud{position:absolute;inset:clamp(14px,1.6vw,26px);z-index:6;pointer-events:none}
.obs-hud i{position:absolute;width:16px;height:16px;border:0 solid #8ed8ff70;transition:border-color .3s}
.obs-hud i:nth-child(1){left:0;top:0;border-width:1px 0 0 1px}.obs-hud i:nth-child(2){right:0;top:0;border-width:1px 1px 0 0}
.obs-hud i:nth-child(3){left:0;bottom:0;border-width:0 0 1px 1px}.obs-hud i:nth-child(4){right:0;bottom:0;border-width:0 1px 1px 0}

/* projected labels */
.obs-overlay,.obs-markers{position:absolute;inset:0;pointer-events:none}
.obs-overlay{z-index:4}.obs-markers{z-index:5}
.obs-tag,.obs-sunlight,.obs-marker{position:absolute;left:0;top:0;will-change:transform;white-space:nowrap}
.obs-tag.is-off,.obs-sunlight.is-off,.obs-marker.is-off{visibility:hidden}
.obs-tag{transition:opacity .35s}
.obs-tag.is-under{opacity:.22}
.obs-tag-axis{display:flex;align-items:baseline;gap:6px;text-shadow:0 0 10px #02040a,0 1px 14px #02040a}
.obs-tag-axis b{font:700 13px/1 var(--mono);color:#eaf8ff;text-shadow:0 0 10px #02040a,0 0 16px #8ed8ff80}
.obs-tag-axis small{font:400 10px/1 var(--body,sans-serif);letter-spacing:.04em;color:#a9dcf5}
.obs-pole-dot{position:absolute;left:0;top:0;width:7px;height:7px;margin:-3.5px 0 0 -3.5px;border-radius:50%;background:#02040a;border:1.5px solid #eaf8ff;box-shadow:0 0 10px #8ed8ffb3;will-change:transform}
.obs-pole-dot.is-off{visibility:hidden}
.obs-tag-tilt{display:flex;flex-direction:column;gap:4px;text-shadow:0 1px 12px #02040a,0 0 3px #02040a}
.obs-tag-tilt b{font:600 clamp(16px,1.35vw,22px)/1 var(--display);letter-spacing:.01em;color:#eef9ff;font-variant-numeric:tabular-nums}
.obs-tag-tilt small{font:400 9px/1 var(--mono);letter-spacing:.16em;color:#a9dcf5}
.obs-tag-tilt.has-plate{background:#02040ac7;box-shadow:0 0 0 7px #02040ac7;border-radius:1px}
.obs-sunlight i{font-style:normal}
.obs-tag-plane{font:400 9px/1.4 var(--mono);letter-spacing:.16em;color:#e6c797d9;text-shadow:0 1px 10px #02040a,0 0 3px #02040a}
.obs-tag-plane small{font:11px var(--body);letter-spacing:.04em;margin-left:8px;color:#e6c797b8}
.obs-tag-parent{font-size:11px;line-height:16px;color:#c9ecff;text-shadow:0 1px 10px #02040a,0 0 3px #02040a;letter-spacing:.04em}
.obs-sunlight>span{display:block;transform:translateY(-50%);font:400 9px/1 var(--mono);letter-spacing:.22em;color:#f5cb79d9;text-shadow:0 0 14px #f5a74866}
.obs-sunlight>span b{font-size:15px;font-weight:400;color:var(--obs-sun);margin:0 2px;vertical-align:-2px}
.obs-sunlight.is-right>span{transform:translate(-100%,-50%)}
.obs-marker{pointer-events:auto;width:30px;height:30px;margin:-15px 0 0 -15px;padding:0;border:0;background:none;color:#cfe6f3;cursor:pointer}
.obs-marker{--ring:max(10px,calc(var(--r,0px) * 2 + 10px))}
.obs-marker::before{content:'';position:absolute;inset:-7px;border-radius:50%}
.obs-marker i{position:absolute;left:50%;top:50%;width:var(--ring);height:var(--ring);transform:translate(-50%,-50%);border:1px solid #a3dbf5c4;border-radius:50%;box-shadow:0 0 12px #8ddcff33;transition:transform .25s,border-color .25s}
.obs-marker span{position:absolute;left:calc(15px + var(--ring) / 2 + 5px);top:50%;transform:translateY(-50%);font-size:11px;line-height:16px;letter-spacing:.04em;padding:1px 6px 2px;border-radius:2px;background:#070b13e6;border:1px solid #ffffff14;text-shadow:0 1px 8px #000;transition:opacity .25s}
.obs-marker.label-left span{left:auto;right:calc(15px + var(--ring) / 2 + 5px)}
.obs-marker.is-quiet span{opacity:0}
.obs-marker.is-muted i{border-color:#a3dbf566;box-shadow:none}
.obs-marker:hover i,.obs-marker:focus-visible i{transform:translate(-50%,-50%) scale(1.35);border-color:#fff}
.obs-marker:hover span,.obs-marker:focus-visible span{opacity:1;color:#fff;text-decoration:underline;text-underline-offset:5px}
.obs-marker:focus-visible{outline-offset:-4px;border-radius:50%}

/* HUD text */
.obs-corner{position:absolute;z-index:7;top:clamp(26px,2.6vw,42px);left:calc(var(--obs-inset) + 4px);display:flex;align-items:center;gap:10px;font:400 9px/1 var(--mono);letter-spacing:.18em;color:#a3b6c6;pointer-events:none}
.obs-live-dot{width:5px;height:5px;border-radius:50%;background:var(--lime,#d9f56c);box-shadow:0 0 9px #d9f56c70;animation:obs-pulse 2.4s ease-in-out infinite}
.obs-stage.is-still .obs-live-dot{background:#7c8a99;box-shadow:none;animation:none}
@keyframes obs-pulse{50%{opacity:.35}}
.obs-stage-controls{position:absolute;z-index:7;top:clamp(18px,2vw,32px);right:calc(var(--obs-inset) - 4px);display:flex;gap:8px;align-items:center}
.obs-chip,.obs-zoom,.obs-round{background:#070b1359;border:1px solid #c5edff47;color:#e6f6ff;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.obs-chip{border-radius:30px;min-height:38px;padding:0 17px;font-size:11px;cursor:pointer;transition:background .3s,border-color .3s}
.obs-chip:hover{background:#8ed8ff22;border-color:#cdf3ff}
.obs-zoom{display:flex;border-radius:30px;padding:3px;gap:2px}
.obs-zoom[hidden]{display:none}
.obs-zoom button{border:0;border-radius:30px;background:none;color:#b7cbd8;font-size:11px;min-height:32px;padding:0 14px;cursor:pointer;transition:background .25s,color .25s}
.obs-zoom button[aria-pressed=true]{background:#8ed8ff2e;color:#fff;box-shadow:inset 0 0 0 1px #8ed8ff66}
.obs-zoom button:hover{color:#fff}
.obs-round{width:38px;height:38px;border-radius:50%;font-size:12px;cursor:pointer;line-height:1;transition:background .3s,border-color .3s}
.obs-round:hover{background:#8ed8ff22;border-color:#cdf3ff}
.obs-round:disabled{opacity:.45;cursor:not-allowed}
.obs-stage-caption{position:absolute;z-index:7;left:calc(var(--obs-inset) + 4px);bottom:clamp(40px,4.4vw,72px);pointer-events:none;max-width:min(560px,58%)}
.obs-stage-caption>span{font:400 10px/1 var(--mono);letter-spacing:.24em;color:#8fb3c9}
.obs-stage-caption h3{font:700 clamp(44px,5vw,88px)/1.05 var(--body,sans-serif);letter-spacing:-.045em;margin:14px 0 12px;color:#fff;text-shadow:0 3px 40px #02040bee,0 0 2px #02040b}
.obs-stage-caption p{margin:0;font-size:clamp(12px,1vw,15px);line-height:1.9;color:#c1ced9;text-shadow:0 2px 14px #02040b}
.obs-stage-caption .obs-coverage{margin-top:14px;max-width:420px}
.obs-stage-foot{position:absolute;z-index:7;right:calc(var(--obs-inset) + 4px);bottom:clamp(40px,4.4vw,72px);display:flex;flex-direction:column;align-items:flex-end;gap:10px;pointer-events:none;text-align:right}
.obs-drag-note{font:400 9px/1 var(--mono);letter-spacing:.2em;color:#8aa2b4}
.obs-drag-note:before{content:'⟷';margin-right:10px;color:var(--obs-blue);letter-spacing:0}
.obs-ring-note{font-size:11px;color:#e6c797cc;max-width:260px;line-height:1.7}
.obs-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;margin:0}

/* telemetry */
.obs-telemetry{position:absolute;z-index:7;left:calc(var(--obs-inset) + 4px);top:clamp(96px,14%,150px);margin:0;display:flex;flex-direction:column;gap:clamp(14px,1.6vw,24px);padding-left:18px;border-left:1px solid #8ed8ff33;pointer-events:none;max-width:260px}
.obs-telemetry>div{position:relative}
@media(min-width:1101px){
  .obs-telemetry{isolation:isolate}
  .obs-telemetry::before{content:'';position:absolute;inset:-48px -140px -48px -90px;z-index:-1;pointer-events:none;background:radial-gradient(60% 55% at 28% 50%,#050810d9,#05081000 75%)}
}
.obs-telemetry>div:before{content:'';position:absolute;left:-21px;top:4px;width:5px;height:1px;background:var(--obs-blue);box-shadow:0 0 6px #8ed8ff}
.obs-telemetry dt{font:400 9px/1 var(--mono);letter-spacing:.2em;color:#8397aa;text-shadow:0 1px 12px #02040b,0 0 2px #02040b}
.obs-telemetry dd{margin:7px 0 4px;font:600 clamp(18px,1.55vw,26px)/1 var(--display);letter-spacing:-.01em;color:#eef6fa;font-variant-numeric:tabular-nums;white-space:nowrap;text-shadow:0 2px 16px #02040b}
.obs-telemetry dd small{font:400 11px var(--mono);letter-spacing:.06em;color:#9fb3c3;margin-left:5px}
.obs-telemetry dd.obs-t-note{display:block;margin:0;font:400 11px/1.55 var(--body,sans-serif);letter-spacing:0;color:#9aabbb;white-space:normal;text-shadow:0 1px 10px #02040b}
.obs-t-clock dd:not(.obs-t-note){color:var(--obs-blue)}

/* ---------- information ---------- */
.obs-information{display:grid;grid-template-columns:minmax(0,1.35fr) auto;gap:clamp(28px,5vw,96px);align-items:end;padding:clamp(34px,4vw,56px) 0 clamp(24px,2.6vw,36px);border-bottom:1px solid var(--obs-line)}
.obs-information p{font-size:clamp(14px,1.05vw,16px);line-height:2.1;color:#b8c4cf;max-width:680px;margin:0}
.obs-information dl{display:flex;gap:clamp(28px,4vw,72px);margin:0}
.obs-information dt{font:400 11px var(--body,sans-serif);color:#8193a4;margin-bottom:10px}
.obs-information dd{margin:0;white-space:nowrap;font:600 clamp(26px,2.5vw,42px)/1 var(--display);letter-spacing:-.02em;color:#eef4f7;font-variant-numeric:tabular-nums}
.obs-information dd small{font:400 12px var(--body,sans-serif);letter-spacing:0;color:#90a3b4;margin-left:6px}
.obs-coverage{font-size:12px;line-height:1.8;color:#ecd3a4;margin:14px 0 0!important;padding-left:14px;border-left:1px solid #e6c7978c}
.obs-notes{list-style:none;margin:24px 0 0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,330px),1fr));gap:10px clamp(24px,3vw,48px)}
.obs-notes li{position:relative;font-size:12px;line-height:1.85;color:#95a4b3;padding-left:18px}
.obs-notes li:before{content:'';position:absolute;left:0;top:.9em;width:8px;height:1px;background:#8ed8ff99}

/* ---------- moons ---------- */
.obs-moon-gallery{margin-top:clamp(52px,5vw,80px)}
.obs-moon-gallery[hidden]{display:none}
.obs-moon-heading{display:grid;grid-template-columns:auto minmax(0,1fr);gap:8px clamp(24px,4vw,64px);align-items:end}
.obs-moon-heading .section-kicker{grid-column:1/-1}
.obs-moon-heading h4{font:700 clamp(26px,2.5vw,40px)/1.3 var(--body,sans-serif);letter-spacing:-.035em;margin:6px 0 0;text-wrap:balance}
.obs-moon-heading p{font-size:12px;line-height:1.9;color:#93a3b3;margin:0;justify-self:end;text-align:right}
.obs-moon-cards{display:grid;grid-template-columns:repeat(var(--cols,4),minmax(0,1fr));gap:14px;margin-top:28px;max-width:calc(var(--cols,4) * 340px)}
@media(min-width:1600px){.obs-moon-cards.is-wide{max-width:none}}
.obs-moon-cards>button{position:relative;display:flex;flex-direction:column;align-items:flex-start;text-align:left;min-width:0;padding:18px 18px 20px;border:1px solid #ffffff17;border-radius:6px;cursor:pointer;color:#dfe8ef;
  background:radial-gradient(ellipse 80% 55% at 50% 30%,#1d3a5633,transparent 75%),#0a0f18;transition:transform .35s var(--ease,ease),border-color .3s,background-color .3s,box-shadow .3s}
.obs-moon-cards>button:hover{transform:translateY(-3px);border-color:#8ed8ff66;box-shadow:0 0 30px #8ed8ff1a}
.obs-moon-cards>button[aria-pressed=true]{border-color:#8ed8ffa6;box-shadow:0 0 0 1px #8ed8ff40,0 0 30px #8ed8ff22}
.obs-moon-portrait{align-self:center;display:block;width:min(128px,70%);aspect-ratio:1;margin:4px 0 16px;transition:transform .6s var(--ease,ease)}
.obs-moon-cards>button:hover .obs-moon-portrait{transform:scale(1.05) rotate(-3deg)}
.obs-moon-portrait img{width:100%;height:100%;object-fit:contain;display:block}
.obs-moon-index{font:400 9px var(--mono);letter-spacing:.16em;color:#7d93a7}
.obs-moon-cards strong{font-size:17px;font-weight:700;letter-spacing:-.01em;margin-top:6px}
.obs-moon-cards small:not(.obs-moon-index){font:400 10px var(--mono);color:#8ea3b6;margin-top:4px}
.obs-moon-tagline{font-size:11px;line-height:1.75;color:#a5b3c0;margin-top:10px}
.obs-moon-coverage{font-size:10px;color:#e6c797;margin-top:8px;padding:2px 8px;border:1px solid #e6c79759;border-radius:20px}
.obs-moon-action{margin-top:auto;padding-top:14px;font-size:11px;color:#a8e1ff;display:flex;gap:8px;align-items:center}
.obs-moon-action b{font-weight:400;transition:transform .3s}
.obs-moon-cards>button:hover .obs-moon-action b{transform:translate(3px,-3px)}

/* ---------- scale ---------- */
.obs-scale-section{margin-top:clamp(56px,5.5vw,88px);padding-top:clamp(32px,3vw,44px);border-top:1px solid var(--obs-line)}
.obs-scale-heading{display:flex;justify-content:space-between;gap:30px;align-items:flex-end}
.obs-scale-heading h4{font:700 clamp(22px,2.2vw,34px)/1.35 var(--body,sans-serif);letter-spacing:-.035em;margin:12px 0 0;text-wrap:balance;word-break:keep-all;overflow-wrap:anywhere}
.obs-scale-heading p{font-size:12px;line-height:1.9;color:#8f9fae;margin:0;text-align:right}
.obs-scale-scroll{width:100%;overflow-x:auto;scrollbar-color:#2e485d transparent;scrollbar-width:thin}
/* true-scale row + magnified row share one horizontally scrolling stack; the SVG draws the funnels and the planet's limb */
.obs-scale-stack{position:relative;min-width:max-content}
.obs-scale-stack>.obs-scale,.obs-scale-stack>.obs-scale-zoom{position:relative;z-index:1}
.obs-scale-links{position:absolute;left:0;top:0;z-index:0;pointer-events:none;overflow:visible}
.obs-links-funnels line{stroke:#8ed8ff;stroke-opacity:.36;stroke-width:1;stroke-dasharray:2 5}
.obs-links-giant{opacity:.7}
.obs-links-limb{fill:none;stroke:#fff4de;stroke-opacity:.85;stroke-width:1.2}
.obs-links-halo{fill:none;stroke:#ffe7bf;stroke-opacity:.5;stroke-width:7}
.obs-scale{--obs-reference:clamp(170px,15vw,240px);display:flex;align-items:flex-end;justify-content:space-evenly;min-width:max-content;gap:clamp(20px,2.4vw,40px);padding:34px 14px 18px}
.obs-body-button{border:0;color:#d2dfeb;background:none;padding:0;min-width:86px;cursor:pointer;text-align:center;display:flex;flex-direction:column;align-items:center}
.obs-body-button:first-child{min-width:var(--obs-reference)}
.obs-size-cell{height:var(--obs-reference);display:flex;align-items:center;justify-content:center;width:100%;position:relative;margin-bottom:14px}
.obs-size-body{position:relative;display:grid;place-items:center;width:calc(var(--obs-reference) * var(--ratio));aspect-ratio:1;flex-shrink:0;border-radius:50%;transition:transform .5s var(--ease,ease)}
.obs-size-body img{width:108%;height:108%;max-width:none;object-fit:contain;display:block}
.obs-size-body.is-tiny:after{content:'';position:absolute;left:50%;top:50%;width:12px;height:12px;margin:-6px 0 0 -6px;border:1px solid #a3dbf599;border-radius:50%}
.obs-size-cell:after{content:'';position:absolute;width:1px;height:13px;bottom:-4px;left:50%;background:#5c728266}
.obs-body-button:hover .obs-size-body{transform:scale(1.04)}
.obs-body-button strong{font-size:12px;font-weight:500;white-space:nowrap;transition:color .2s}
.obs-body-button small{font:10px var(--mono);color:#6f889b;white-space:nowrap;line-height:2.1}
.obs-body-button:hover strong,.obs-body-button[aria-pressed=true] strong{color:#a8e1ff}
.obs-body-button[aria-pressed=true] strong:after{content:' ↗'}
.obs-scale-note{font-size:11px;line-height:1.9;color:#8d9faf;margin:12px 0 0;max-width:980px}
.obs-scale-section[hidden],.obs-scale-zoom[hidden]{display:none}
.obs-scale-zoom{--obs-reference:clamp(170px,15vw,240px);margin-top:8px;padding-top:18px;border-top:1px dashed #8ed8ff26}
.obs-scale-zoom-head{position:sticky;left:14px;width:max-content;max-width:min(100%,calc(100vw - 2 * var(--layout-gutter,20px)));margin:0 14px;font-size:12px;line-height:1.8;color:#a9b8c6;display:flex;align-items:baseline;gap:4px 14px;flex-wrap:wrap}
.obs-scale-zoom-head span{font:400 9px var(--mono);letter-spacing:.18em;color:var(--obs-blue)}
/* each magnified moon sits under its own column (left is set by layoutScale); discs share one centre line */
.obs-scale-zoom-row{position:relative;height:calc(var(--obs-reference) * var(--zoom-max,.5) + 72px);margin-top:14px}
.obs-scale-zoom-row figure{margin:0;display:flex;flex-direction:column;align-items:center;min-width:64px}
.obs-scale-zoom-row figure[data-body]{position:absolute;top:0;transform:translateX(-50%)}
.obs-zoom-cell{height:calc(var(--obs-reference) * var(--zoom-max,.5) + 14px);display:flex;align-items:center;justify-content:center;margin-bottom:10px}
.obs-zoom-giant{position:absolute;top:0;bottom:0;align-items:flex-start!important;justify-content:flex-end;pointer-events:none}
.obs-zoom-giant figcaption{align-items:flex-start!important;text-shadow:0 1px 8px #03060c}
.obs-scale-zoom-row small b{font-weight:400;color:var(--obs-blue);margin-left:5px}
.obs-scale-zoom-row figcaption{display:flex;flex-direction:column;align-items:center;line-height:1.5}
.obs-scale-zoom-row strong{font-size:12px;font-weight:500;color:#d2dfeb;white-space:nowrap}
.obs-scale-zoom-row small{font:10px var(--mono);color:#7f95a8;white-space:nowrap;line-height:2}

/* ---------- credit line (full list in #sources) ---------- */
.obs-credit{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 22px;margin:clamp(36px,3.6vw,56px) 0 0;padding-top:18px;border-top:1px solid var(--obs-line);font:400 9px/2.1 var(--mono);letter-spacing:.1em;color:#8a97a6;word-break:keep-all;overflow-wrap:anywhere}
.obs-credit a{color:#b3d2e6;letter-spacing:.04em;font-family:var(--body,sans-serif);font-size:11px;text-decoration:underline;text-underline-offset:4px;text-decoration-color:#8ed8ff55;white-space:nowrap}
.obs-credit a:hover{color:#fff}

/* ---------- fallback ---------- */
.obs-stage.is-fallback canvas{visibility:hidden}
.obs-stage.is-fallback .obs-drag-note{display:none}

/* ---------- responsive ---------- */
@media(min-width:1101px) and (max-width:1360px){.obs-telemetry{gap:12px}.obs-telemetry dd.obs-t-note{display:none}}
@media(min-width:1920px){.obs-telemetry{max-width:300px}.obs-stage-caption{max-width:620px}.obs-intro p{font-size:15px}}
@media(min-width:2400px){.obs-intro p{font-size:17px}}
@media(max-width:1100px){
  .obs-telemetry{position:static;transform:none;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:18px 20px;max-width:none;padding:22px var(--obs-gutter) 4px;border-left:0;background:linear-gradient(180deg,var(--obs-night),transparent)}
  .obs-telemetry>div{padding-left:12px;border-left:1px solid #8ed8ff33}
  .obs-telemetry>div:before{left:-1px;top:0;width:1px;height:11px}
  .obs-stage-caption{max-width:70%}
  .obs-moon-cards{grid-template-columns:repeat(auto-fill,minmax(160px,1fr));max-width:none}
}
@media(max-width:800px){
  .obs-intro{display:block}.obs-intro p{margin-top:22px;font-size:13px;line-height:2.1}
  .obs-navigation{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none;margin-inline:calc(var(--obs-gutter) * -1);padding-inline:var(--obs-gutter);border-block:1px solid var(--obs-line);scroll-padding-inline:var(--obs-gutter)}
  .obs-navigation::-webkit-scrollbar{display:none}
  .obs-navigation button{flex:0 0 auto;scroll-snap-align:start;padding:14px 16px 14px 10px}
  .obs-nav-disc{width:40px}
  .obs-nav-text b{font-size:13px}
  .obs-stage{height:clamp(460px,min(135vw,calc(100svh - 150px)),720px)}
  .obs-stage-caption{max-width:calc(100% - 2 * var(--obs-gutter));bottom:30px}
  .obs-stage-caption h3{font-size:clamp(34px,9vw,52px);margin:10px 0 8px}
  .obs-stage-foot{bottom:auto;top:100px;right:calc(var(--obs-gutter) + 2px)}
  .obs-ring-note{max-width:170px;font-size:10px}
  .obs-corner{top:26px;font-size:8px;letter-spacing:.12em}
  .obs-stage-controls{top:40px}                       /* below the HUD corner brackets and the mode label */
  .obs-zoom button,.obs-chip,.obs-round{min-height:44px}.obs-round{min-width:44px}.obs-zoom button{font-size:12px}
  .obs-credit a{padding-block:11px}
  .obs-information{display:block}.obs-information dl{margin-top:26px}
  .obs-moon-heading{display:block}.obs-moon-heading p{text-align:left;margin-top:12px}
  .obs-scale-heading{display:block}.obs-scale-heading p{text-align:left;margin-top:14px}
}
@media(max-width:600px){
  .observatory{padding-top:92px}
  .obs-intro p br{display:none}
  .obs-telemetry{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 14px}
  .obs-telemetry dt{font-size:8px}.obs-telemetry dd{font-size:18px}.obs-telemetry dd.obs-t-note{font-size:10px}
  .obs-t-clock{grid-column:1/-1}
  .obs-corner>span:last-child{max-width:170px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .obs-zoom button{padding:0 10px}
  .obs-chip{padding:0 14px;font-size:11px}
  .obs-round{width:44px;height:44px}
  .obs-stage-foot{display:none}
  .obs-stage-caption>span{font-size:9px}
  .obs-stage-caption p{font-size:12px}
  .obs-moon-cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
  .obs-moon-cards>button{padding:14px 12px 16px}
  .obs-moon-tagline{display:none}
  .obs-marker span{font-size:10px}
  .obs-tag-plane small{display:none}
  .obs-sunlight i{display:none}
  .obs-scale,.obs-scale-zoom{--obs-reference:150px}
  .obs-scale-zoom-row{gap:16px 20px}
}
@media(max-width:420px){.obs-stage-caption h3{font-size:34px}}
@media (orientation:landscape) and (max-height:540px){
  .obs-stage{height:max(280px,calc(100svh - var(--header-h,56px)))}
  .obs-hud{inset:10px}
  .obs-corner{top:22px;font-size:8px;letter-spacing:.14em}
  .obs-stage-controls{top:14px;right:max(30px,calc(var(--obs-inset) - 4px));gap:6px}   /* clear of the corner bracket */
  .obs-zoom{padding:2px}
  .obs-zoom button,.obs-chip,.obs-round{min-height:44px}.obs-round{width:44px;height:44px}
  .obs-zoom button{padding:0 12px}
  .obs-tag-tilt b{font-size:15px}.obs-tag-tilt small{font-size:8px;letter-spacing:.12em}
  .obs-tag-axis b{font-size:11px}.obs-tag-axis small{font-size:9px}
  .obs-tag-plane{font-size:8px}.obs-tag-plane small{display:none}
  .obs-stage-caption{bottom:20px}
  .obs-stage-caption>span{font-size:9px}
  .obs-stage-caption h3{font-size:30px;margin:6px 0 4px}
  .obs-stage-caption p{font-size:11px;line-height:1.6}
  .obs-stage-caption .obs-coverage{display:none}
  .obs-stage-foot{top:auto;bottom:20px;gap:6px}
  .obs-ring-note{font-size:10px;max-width:200px}
}