.neptune-scene{position:absolute;inset:0;overflow:hidden;z-index:4;background:#020811;opacity:0}.neptune-scene[hidden]{display:none}.neptune-space-haze{position:absolute;inset:0;pointer-events:none;background:radial-gradient(ellipse at 66% 44%,rgba(79,160,177,.16),transparent 48%),radial-gradient(ellipse at 42% 67%,rgba(32,71,94,.18),transparent 62%)}.neptune-viewport{position:absolute;inset:0;pointer-events:none}.neptune-viewport canvas{display:block;width:100%;height:100%}.neptune-edge-shade{position:absolute;inset:0;pointer-events:none;background:linear-gradient(0deg,rgba(2,8,17,.74),transparent 19%,transparent 80%,rgba(2,8,17,.24))}.neptune-caption{position:absolute;left:7.5%;bottom:14%;z-index:7;width:min(710px,77vw);opacity:0;transform:translateY(14px);pointer-events:none;transition:opacity .8s ease,transform .8s cubic-bezier(.22,.78,.2,1)}.neptune-caption.is-visible{opacity:1;transform:none;pointer-events:auto}.neptune-caption .eyebrow{display:flex;align-items:center;gap:12px;margin:0 0 12px;color:#8ed4d8;font-size:8px;letter-spacing:3.5px;text-transform:uppercase}.neptune-caption .eyebrow span{display:block;width:31px;height:1px;background:#6fa9dd88}.neptune-caption h2{margin:0;color:#edf9f7;font-family:Georgia,"Times New Roman",serif;font-size:clamp(70px,8.4vw,126px);font-weight:400;line-height:.92;letter-spacing:-.045em}.neptune-caption h2 span{color:#6fa9dd}.neptune-whisper{margin:14px 0 22px;color:#a4b7c1;font-size:12px;letter-spacing:.6px}.neptune-arrival-actions{display:grid;grid-template-columns:minmax(130px,1fr) auto minmax(130px,1fr);align-items:center;gap:14px;width:min(690px,73vw)}.neptune-planet-nav{min-height:48px;display:flex;align-items:center;gap:10px;padding:0 4px;border:0;border-top:1px solid #d5e8ea21;border-bottom:1px solid #d5e8ea21;background:transparent;color:#91a2ae;text-align:left;transition:color .25s ease,border-color .25s ease,opacity .25s ease,transform .12s ease}.neptune-planet-nav svg{flex:0 0 auto;width:16px;height:16px;stroke:currentColor;stroke-width:1.25}.neptune-planet-nav span{display:grid;gap:3px;min-width:0}.neptune-planet-nav small,.neptune-planet-nav strong{display:block;font-weight:500;text-transform:uppercase;white-space:nowrap}.neptune-planet-nav small{color:#718591;font-size:6px;letter-spacing:1.45px}.neptune-planet-nav strong{color:inherit;font-size:8px;letter-spacing:1.15px}.neptune-planet-prev{justify-content:flex-start}.neptune-planet-next{justify-content:flex-end;text-align:right}.neptune-planet-nav:hover:not(:disabled){color:#a9e6e5;border-color:#6fa9dd62}.neptune-planet-nav:active:not(:disabled){transform:scale(.985)}.neptune-planet-nav:disabled{opacity:.34;cursor:default}.neptune-explore-button{display:inline-flex;align-items:center;justify-content:space-between;gap:28px;min-height:48px;padding:0 18px 0 21px;border-radius:2px;border:1px solid #7fb7e8;background:linear-gradient(120deg,#a8dfe0,#3f78bd);color:#10202a;font-size:10px;font-weight:700;letter-spacing:1.1px;text-transform:uppercase;white-space:nowrap;box-shadow:0 7px 28px #326fb926,inset 0 1px #dcefff;transition:transform .28s ease,background .28s ease,box-shadow .28s ease}.neptune-explore-button svg{width:17px;height:17px;stroke:currentColor;stroke-width:1.5}.neptune-explore-button:hover{transform:translateY(-2px);background:#94c7ee;box-shadow:0 9px 34px #326fb93d,inset 0 1px #e8f4ff}.neptune-context-media{position:absolute;z-index:7;top:clamp(100px,15vh,165px);right:clamp(32px,5vw,88px);width:min(390px,31vw);pointer-events:auto;opacity:0;transform:translateX(14px);transition:opacity .55s ease,transform .55s ease}.neptune-scene.is-exploring .neptune-context-media:not([hidden]){opacity:1;transform:none}.neptune-scene:not(.is-exploring) .neptune-context-media{opacity:0;pointer-events:none}.neptune-exploration{position:absolute;z-index:9;top:20%;left:6.5%;width:min(390px,34vw);height:clamp(440px,60vh,575px);max-height:calc(100dvh - 170px);padding:24px 25px 22px;display:flex;flex-direction:column;overflow:hidden;border:1px solid #5c8fbd25;border-left-color:#6fa9dd77;border-radius:2px;background:linear-gradient(145deg,#06131eea,#04101acc);box-shadow:0 25px 90px #0000003d;backdrop-filter:blur(15px);-webkit-backdrop-filter:blur(15px);opacity:0;transform:translate3d(-14px,8px,0);pointer-events:none;visibility:hidden;transition:opacity .65s ease,transform .8s cubic-bezier(.2,.75,.2,1),visibility 0s linear .8s}.neptune-scene.is-exploring .neptune-exploration{opacity:1;transform:none;pointer-events:auto;visibility:visible;transition-delay:.18s,.18s,0s}.neptune-scene.is-exploring .neptune-caption{opacity:0!important;transform:translateY(14px)!important;pointer-events:none!important;visibility:hidden}.neptune-scene.is-exploring .neptune-credit{opacity:0!important;pointer-events:none!important}.neptune-exploration-topline{display:flex;justify-content:space-between;align-items:center;gap:20px;padding-bottom:15px;border-bottom:1px solid #d8e9ea14}.neptune-topic-kicker,.neptune-topic-count{font-size:7px;letter-spacing:2.4px;color:#69a9e2;text-transform:uppercase}.neptune-topic-count{color:#8195aa;letter-spacing:1.7px;font-variant-numeric:tabular-nums}.neptune-topic-count #neptune-topic-current{color:#6fa9dd}.neptune-exploration h3{margin:20px 0 5px;color:#edf6ff;font-family:Georgia,"Times New Roman",serif;font-size:clamp(31px,3vw,43px);line-height:1.03;font-weight:400;letter-spacing:-1px}.neptune-topic-subtitle{margin:0 0 17px;color:#79a9d8;font-size:8px;line-height:1.5;letter-spacing:2.1px;text-transform:uppercase}.neptune-topic-scroll{flex:1 1 auto;min-height:0;overflow-y:auto;overscroll-behavior:contain;padding-right:14px;scrollbar-width:thin;scrollbar-color:#699aa16e transparent}.neptune-topic-summary{margin:0;color:#b8c9d8;font-size:12px;line-height:1.65}.neptune-topic-facts{display:grid;gap:9px;margin:18px 0 17px;padding:0;list-style:none}.neptune-topic-facts li{position:relative;padding-left:15px;color:#9badbd;font-size:10px;line-height:1.55}.neptune-topic-facts li::before{content:"";position:absolute;left:0;top:.72em;width:6px;height:1px;background:#6fa9ddaa}.neptune-topic-source{display:inline-flex;align-self:flex-start;margin-top:12px;color:#7189a2;font-size:7px;letter-spacing:1.25px;text-decoration:none;text-transform:uppercase}.neptune-topic-source:hover{color:#8dc6f2}.neptune-exploration-controls{display:grid;grid-template-columns:38px 1fr 38px;align-items:center;gap:13px;margin-top:22px}.neptune-topic-nav{width:38px;height:38px;display:grid;place-items:center;padding:0;border:1px solid #b6cde329;border-radius:50%;background:#06131e99;color:#d1e1ef;cursor:pointer;transition:border-color .25s ease,color .25s ease,transform .25s ease,opacity .25s ease}.neptune-topic-nav:hover:not(:disabled){border-color:#6fa9dd88;color:#6fa9dd;transform:scale(1.055)}.neptune-topic-nav:disabled{opacity:.24;cursor:default}.neptune-topic-nav svg{width:16px;height:16px;stroke:currentColor;stroke-width:1.35}.neptune-topic-progress{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;gap:4px}.neptune-topic-progress span{height:1px;background:#788a9e29;transition:background .35s ease,transform .35s ease;transform-origin:left}.neptune-topic-progress span.is-active{background:#6fa9dd;transform:scaleY(2)}.neptune-exploration-close{display:block;width:fit-content;min-width:188px;margin:17px auto 0;padding:8px 14px;border:1px solid #5b84ae4a;border-radius:2px;background:#06131e66;color:#8297aa;font:inherit;font-size:7px;letter-spacing:1.2px;text-transform:uppercase;cursor:pointer}.neptune-exploration-close:hover{border-color:#6fa9dd7a;color:#c9d9e8}.neptune-credit{position:absolute;right:3.5%;bottom:80px;z-index:8;color:#71869b;font-size:7px;letter-spacing:.5px;text-decoration:none;opacity:0;transition:opacity .3s ease}.neptune-credit:hover{color:#7fb9e8}.neptune-axis-overlay,.neptune-season-overlay,.neptune-ring-annotation{position:absolute;inset:0;z-index:6;pointer-events:none}.neptune-axis-overlay[hidden],.neptune-season-overlay[hidden],.neptune-ring-annotation[hidden]{display:none}.neptune-axis-line{position:absolute;left:65%;top:21%;width:2px;height:57%;background:linear-gradient(transparent,#9dcff4 14%,#9dcff4 86%,transparent);transform:rotate(82deg);transform-origin:center;box-shadow:0 0 12px #5fa9e8aa}.neptune-axis-line::before,.neptune-axis-line::after{content:"";position:absolute;left:50%;width:8px;height:8px;border:1px solid #9dcff4;transform:translateX(-50%) rotate(45deg)}.neptune-axis-line::before{top:7%}.neptune-axis-line::after{bottom:7%}.neptune-axis-label{position:absolute;left:73%;top:27%;display:grid;gap:4px;color:#9dcff4;font-size:9px;letter-spacing:1.5px}.neptune-axis-label b{font-size:20px;font-weight:400;letter-spacing:.04em}.neptune-season-sun{position:absolute;left:47%;top:45%;width:14px;height:14px;border-radius:50%;background:#c8dcff;box-shadow:0 0 25px #9dbde9}.neptune-season-ray{position:absolute;left:23%;top:47%;width:31%;height:1px;background:linear-gradient(90deg,transparent,#c8dcff88)}.neptune-ring-annotation .ring-label{position:absolute;color:#9eb9d2;font-size:7px;letter-spacing:1.4px;text-transform:uppercase}.neptune-ring-annotation .ring-label::after{content:"";position:absolute;top:50%;height:1px;background:#6789aa55}.neptune-ring-annotation .epsilon{left:70%;top:35%}.neptune-ring-annotation .epsilon::after{right:calc(100% + 8px);width:72px}.neptune-ring-annotation .beta{left:72%;top:43%}.neptune-ring-annotation .beta::after{right:calc(100% + 8px);width:82px}.neptune-ring-annotation .alpha{left:71%;top:50%}.neptune-ring-annotation .alpha::after{right:calc(100% + 8px);width:76px}.neptune-exploration.is-switching-next .neptune-topic-scroll,.neptune-exploration.is-switching-next h3,.neptune-exploration.is-switching-next .neptune-topic-subtitle{animation:neptuneSlideNext .54s cubic-bezier(.22,.75,.2,1)}.neptune-exploration.is-switching-prev .neptune-topic-scroll,.neptune-exploration.is-switching-prev h3,.neptune-exploration.is-switching-prev .neptune-topic-subtitle{animation:neptuneSlidePrev .54s cubic-bezier(.22,.75,.2,1)}@keyframes neptuneSlideNext{0%{opacity:.25;transform:translateX(18px)}100%{opacity:1;transform:none}}@keyframes neptuneSlidePrev{0%{opacity:.25;transform:translateX(-18px)}100%{opacity:1;transform:none}}.neptune-scene.is-leaving .neptune-caption,.neptune-scene.is-leaving .neptune-credit{pointer-events:none}.is-neptune .masthead{opacity:1;transition:opacity 2s}.is-neptune .preparation{opacity:0}.mission.is-planet-transitioning .neptune-caption{pointer-events:none}.mission.is-planet-transitioning .is-nav-pressed{transform:scale(.975)!important;filter:brightness(1.15)}
@media(max-width:900px) and (min-width:701px){.neptune-caption{left:5%;width:min(690px,88vw)}.neptune-exploration{left:4.5%;width:min(350px,43vw);padding:20px}.neptune-context-media{right:26px;width:min(330px,38vw)}.neptune-axis-line{left:66%}}
@media(max-width:700px){.neptune-caption{left:18px;right:18px;bottom:24px;width:auto;text-align:center}.neptune-caption .eyebrow{justify-content:center}.neptune-caption .eyebrow span{display:none}.neptune-caption h2{font-size:clamp(58px,18vw,84px)}.neptune-whisper{margin:10px 0 15px;font-size:10px}.neptune-arrival-actions{grid-template-columns:minmax(0,1fr) minmax(0,1.18fr) minmax(0,1fr);gap:6px;width:100%}.neptune-arrival-actions>*{min-width:0}.neptune-planet-nav,.neptune-explore-button{min-width:0;min-height:50px;padding:8px 6px;gap:5px}.neptune-planet-nav small,.neptune-planet-nav strong{white-space:normal}.neptune-planet-nav small{font-size:5.5px;letter-spacing:.9px}.neptune-planet-nav strong{font-size:7.5px;letter-spacing:.8px}.neptune-explore-button{font-size:7.5px;letter-spacing:.05em}.neptune-exploration{top:auto;left:5%;right:5%;bottom:5.5%;width:auto;height:min(46dvh,340px);max-height:calc(100dvh - 48px);transform:translateY(18px);padding:16px 17px 14px}.neptune-scene.is-exploring .neptune-exploration{transform:none}.neptune-exploration h3{margin-top:15px;font-size:29px}.neptune-exploration-controls{margin-top:14px}.neptune-exploration-close{margin-top:10px}.neptune-context-media{top:70px;right:14px;width:190px}.neptune-credit{display:none}.neptune-axis-line{left:50%;top:14%;height:36%;transform:rotate(82deg)}.neptune-axis-label{left:65%;top:14%}.neptune-ring-annotation .ring-label{display:none}}
@media(prefers-reduced-motion:reduce){.neptune-caption,.neptune-exploration,.neptune-context-media,.neptune-planet-nav,.neptune-explore-button{transition:none}.neptune-exploration.is-switching-next .neptune-topic-scroll,.neptune-exploration.is-switching-next h3,.neptune-exploration.is-switching-next .neptune-topic-subtitle,.neptune-exploration.is-switching-prev .neptune-topic-scroll,.neptune-exploration.is-switching-prev h3,.neptune-exploration.is-switching-prev .neptune-topic-subtitle{animation:none}}

.neptune-flow-overlay{position:absolute;inset:0;z-index:6;pointer-events:none;overflow:hidden}
.neptune-flow-overlay[hidden]{display:none}
.neptune-flow-line{position:absolute;left:58%;width:25%;height:1px;background:linear-gradient(90deg,transparent,#9ad9ffb8,transparent);box-shadow:0 0 12px #5ca9e5aa;transform:skewX(-18deg);animation:neptuneFlow 3.8s linear infinite}
.neptune-flow-line:nth-child(1){top:33%;animation-delay:-.8s}.neptune-flow-line:nth-child(2){top:42%;width:29%;animation-delay:-2.1s}.neptune-flow-line:nth-child(3){top:53%;width:22%;animation-delay:-3s}
@keyframes neptuneFlow{0%{opacity:.22;transform:translateX(-20px) skewX(-18deg)}50%{opacity:.8}100%{opacity:.18;transform:translateX(36px) skewX(-18deg)}}
.neptune-focus-reticle{position:absolute;z-index:8;width:1px;height:1px;pointer-events:none;opacity:0;transition:opacity .3s ease}
.neptune-focus-reticle.is-marker-visible{opacity:1}
.neptune-focus-ring{position:absolute;left:-24px;top:-24px;width:48px;height:48px;border:1px solid #b9dfff77;border-radius:50%;box-shadow:0 0 18px #559de655}
.neptune-focus-dot{position:absolute;left:-3px;top:-3px;width:6px;height:6px;border-radius:50%;background:#d9f1ff;box-shadow:0 0 10px #73b9ff}
.neptune-focus-line{position:absolute;left:20px;top:0;width:86px;height:1px;background:linear-gradient(90deg,#a9d8f2aa,transparent)}
.neptune-focus-label{position:absolute;left:112px;top:-14px;display:grid;gap:3px;min-width:155px}
.neptune-focus-title{color:#dceeff;font-size:8px;letter-spacing:1.7px}.neptune-focus-context{color:#718ba3;font-size:6px;letter-spacing:1.2px}
.neptune-ring-annotation{position:absolute;inset:0;z-index:6;pointer-events:none}
.neptune-ring-annotation[hidden]{display:none}
.neptune-ring-annotation .ring-label{position:absolute;color:#9eb6cc;font-size:7px;letter-spacing:1.3px;text-transform:uppercase}
.neptune-ring-annotation .ring-label::after{content:"";position:absolute;top:50%;height:1px;background:#657f9955}
.neptune-ring-annotation .adams{left:73%;top:35%}.neptune-ring-annotation .adams::after{right:calc(100% + 8px);width:86px}
.neptune-ring-annotation .leverrier{left:72%;top:43%}.neptune-ring-annotation .leverrier::after{right:calc(100% + 8px);width:78px}
.neptune-ring-annotation .arcs{left:71%;top:51%}.neptune-ring-annotation .arcs::after{right:calc(100% + 8px);width:70px}
@media(max-width:700px){.neptune-flow-overlay{display:none}.neptune-ring-annotation .ring-label{display:none}.neptune-focus-label{display:none}}
@media(prefers-reduced-motion:reduce){.neptune-flow-line{animation:none}}


/* 2026-10-03 CHILD EDUCATION MOBILE READABILITY
   Keep the longer child-friendly lessons readable without turning the mobile
   exploration sheet into tiny textbook text. */
@media(max-width:700px){
  .neptune-exploration{height:min(56dvh,420px)!important;max-height:calc(100dvh - 48px)!important}
  .neptune-exploration h3{font-size:clamp(25px,7.4vw,29px)!important;line-height:1.05!important}
  .neptune-topic-summary{font-size:12px!important;line-height:1.62!important}
  .neptune-topic-facts li{font-size:10px!important;line-height:1.5!important}
  .neptune-topic-facts{gap:8px!important;margin:15px 0 14px!important}
}
@media(max-width:340px){
  .neptune-exploration{height:min(58dvh,420px)!important;left:4%!important;right:4%!important;padding:15px 15px 13px!important}
  .neptune-exploration h3{font-size:24px!important}
  .neptune-exploration-controls{margin-top:11px!important}
  .neptune-exploration-close{margin-top:8px!important}
}

/* Keep historical-storm / Triton marker labels inside the viewport. */
.neptune-focus-reticle.is-left .neptune-focus-line{left:auto;right:20px;background:linear-gradient(270deg,#a9d8f2aa,transparent)}
.neptune-focus-reticle.is-left .neptune-focus-label{left:auto;right:112px;text-align:right}