:root{--bg-deep: #040810;--bg-panel: rgba(8, 16, 32, .88);--bg-panel-solid: #0a1224;--bg-card: rgba(12, 24, 48, .92);--accent: #4d9fff;--accent-light: #7cb8ff;--accent-dim: rgba(77, 159, 255, .15);--accent-glow: rgba(77, 159, 255, .3);--text-primary: rgba(255, 255, 255, .95);--text-secondary: rgba(200, 220, 255, .7);--text-dim: rgba(160, 180, 210, .5);--border: rgba(77, 159, 255, .2);--border-hover: rgba(77, 159, 255, .45);--shadow: 0 4px 24px rgba(0, 0, 0, .5);--shadow-accent: 0 0 20px rgba(77, 159, 255, .15);--radius: 12px;--radius-sm: 8px;--radius-lg: 16px;--font: "Inter", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;--transition: .3s cubic-bezier(.4, 0, .2, 1);--panel-blur: blur(16px) saturate(1.2)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html,body,#app,#scene-container{width:100%;height:100%;overflow:hidden;background:var(--bg-deep);color:var(--text-primary);font-family:var(--font)}#scene-container{position:absolute;top:0;left:0;z-index:0}#loading-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:var(--bg-deep);z-index:9999;display:flex;align-items:center;justify-content:flex-start;transition:opacity .8s ease}#loading-overlay.fade-out{opacity:0;pointer-events:none}.loading-spinner{width:48px;height:48px;border:3px solid rgba(77,159,255,.2);border-top-color:var(--accent);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading-text{margin-top:20px;font-size:1rem;color:var(--text-secondary);letter-spacing:1px}#planet-labels{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:5}.planet-label{position:absolute;transform:translate(-50%,-100%);display:flex;align-items:center;gap:5px;padding:3px 8px 3px 4px;background:#081020bf;border:1px solid rgba(77,159,255,.25);border-radius:10px;pointer-events:auto;cursor:pointer;transition:all var(--transition);white-space:nowrap;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.planet-label:hover{background:#4d9fff40;border-color:var(--accent);box-shadow:var(--shadow-accent);transform:translate(-50%,-100%) scale(1.08)}.planet-label .label-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0;box-shadow:0 0 6px currentColor}.planet-label .label-text{font-size:.82rem;font-weight:500;color:#ffffffeb;text-shadow:0 1px 3px rgba(0,0,0,.8);letter-spacing:.3px}#top-nav{position:absolute;top:0;left:0;width:100%;z-index:20;display:flex;align-items:center;justify-content:space-between;padding:10px 20px;background:linear-gradient(180deg,rgba(4,8,16,.92) 0%,rgba(4,8,16,.7) 70%,transparent 100%);-webkit-backdrop-filter:var(--panel-blur);backdrop-filter:var(--panel-blur);border-bottom:1px solid rgba(77,159,255,.08)}.nav-brand{display:flex;align-items:center;gap:10px}.nav-icon{font-size:1.5rem;background:radial-gradient(circle,#ffcc00 0%,#ff8800 60%,transparent 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;filter:drop-shadow(0 0 8px rgba(255,180,50,.4))}.nav-title{font-size:1.2rem;font-weight:500;letter-spacing:2px;text-transform:uppercase;color:#dcf0fff2;text-shadow:0 0 20px rgba(77,159,255,.3)}.nav-tabs{display:flex;gap:4px;background:#ffffff0a;border-radius:10px;padding:3px}.nav-tab{background:transparent;border:none;color:var(--text-secondary);padding:7px 16px;border-radius:8px;cursor:pointer;font-size:.82rem;font-weight:500;font-family:var(--font);transition:all var(--transition);letter-spacing:.3px}.nav-tab:hover{color:var(--text-primary);background:#4d9fff1a}.nav-tab.active{color:#fff;background:#4d9fff33;box-shadow:0 0 12px #4d9fff26,inset 0 0 8px #4d9fff14}.nav-actions{display:flex;align-items:center;gap:10px}.login-btn{text-decoration:none;background:#4d9fff26;border:1px solid rgba(77,159,255,.3);color:var(--accent-light);padding:6px 14px;border-radius:var(--radius-sm);cursor:pointer;font-size:.8rem;font-family:var(--font);transition:all var(--transition)}.login-btn:hover{background:#4d9fff4d;color:#fff;box-shadow:0 0 12px #4d9fff33}.nav-action-btn{background:#ffffff0f;border:1px solid rgba(255,255,255,.12);color:var(--text-secondary);padding:6px 14px;border-radius:var(--radius-sm);cursor:pointer;font-size:.8rem;font-family:var(--font);transition:all var(--transition)}.nav-action-btn:hover{background:#4d9fff26;color:#fff;border-color:var(--border-hover)}.nav-action-btn.active{background:#4d9fff40;border-color:var(--accent);color:var(--accent-light);box-shadow:var(--shadow-accent)}#scale-switcher{display:flex;gap:3px;background:#ffffff0a;border-radius:8px;padding:2px}.scale-btn{background:transparent;border:none;color:var(--text-dim);padding:5px 10px;border-radius:6px;cursor:pointer;font-size:.75rem;font-family:var(--font);transition:all var(--transition)}.scale-btn:hover{color:var(--text-secondary);background:#4d9fff14}.scale-btn.active{color:var(--accent-light);background:#4d9fff2e;box-shadow:0 0 8px #4d9fff1a}#side-panel{position:absolute;top:56px;right:0;bottom:70px;width:380px;max-width:90vw;background:var(--bg-panel);-webkit-backdrop-filter:var(--panel-blur);backdrop-filter:var(--panel-blur);border-left:1px solid var(--border);border-radius:var(--radius-lg) 0 0 var(--radius-lg);z-index:25;overflow-y:auto;overflow-x:hidden;padding:20px;box-shadow:-4px 0 30px #00000080;transition:transform .4s cubic-bezier(.4,0,.2,1),opacity .35s ease;transform:translate(0)}#side-panel.hidden{transform:translate(110%);opacity:0;pointer-events:none}.side-panel-header{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:16px}.side-panel-title-row{display:flex;align-items:center;gap:12px}.side-icon{width:42px;height:42px;border-radius:50%;display:flex;align-items:center;justify-content:flex-start;font-size:1.5rem;background:var(--accent-dim);border:2px solid var(--accent);box-shadow:0 0 16px #4d9fff33;flex-shrink:0}.side-title-info h2{font-size:1.4rem;font-weight:600;color:#fff;text-shadow:0 0 12px rgba(77,159,255,.3);margin:0}.side-title-info span{font-size:.78rem;color:var(--text-secondary);border:1px solid rgba(77,159,255,.25);padding:2px 10px;border-radius:12px;background:#4d9fff0f;display:inline-block;margin-top:4px}.panel-close-btn{background:#ffffff0f;border:1px solid rgba(255,255,255,.1);color:var(--text-dim);font-size:1rem;cursor:pointer;width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:flex-start;transition:all var(--transition);flex-shrink:0}.panel-close-btn:hover{background:#ff3c3c26;color:#f66;border-color:#ff3c3c4d}.side-image{width:100%;height:180px;border-radius:var(--radius);background:linear-gradient(135deg,#14285080,#0a1428cc);margin-bottom:16px;overflow:hidden;display:flex;align-items:center;justify-content:flex-start;border:1px solid rgba(77,159,255,.1)}.side-image canvas{border-radius:var(--radius)}.side-description{font-size:.92rem;line-height:1.65;color:var(--text-primary);margin-bottom:14px}.side-fact-block{background:linear-gradient(90deg,#4d9fff14,#4d9fff05);border-left:3px solid var(--accent);padding:12px 16px;margin-bottom:14px;border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-primary);line-height:1.55;font-size:.9rem}.side-fact-block strong{color:var(--accent-light)}.side-params{width:100%;border-collapse:collapse;margin-bottom:14px;font-size:.85rem}.side-params tr:nth-child(2n){background:#4d9fff08}.side-params td{padding:7px 10px;border-bottom:1px solid rgba(77,159,255,.06)}.side-params td:first-child{color:var(--text-secondary);width:45%;font-size:.82rem}.side-params td:last-child{color:#e8f0ff}.side-params .note{font-size:.72rem;color:var(--text-dim);margin-left:4px}.side-source{font-size:.75rem;color:var(--text-dim);margin-bottom:14px;padding:6px 10px;background:#ffffff05;border-radius:var(--radius-sm);border:1px solid rgba(255,255,255,.04)}.side-actions{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px}.side-btn{background:#4d9fff14;border:1px solid rgba(77,159,255,.2);color:var(--accent-light);padding:8px 14px;border-radius:var(--radius-sm);cursor:pointer;font-size:.82rem;font-family:var(--font);transition:all var(--transition);white-space:nowrap}.side-btn:hover{background:#4d9fff33;color:#fff;border-color:var(--border-hover);box-shadow:0 0 10px #4d9fff1a}.side-btn.active{background:#4d9fff4d;border-color:var(--accent)}.side-moons-list{border-top:1px solid var(--border);padding-top:14px;margin-top:4px}.side-moons-list.hidden{display:none}.side-moons-list h3{font-size:.9rem;font-weight:500;color:var(--text-secondary);margin-bottom:10px}.moon-item{display:flex;align-items:center;gap:8px;padding:6px 10px;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);margin-bottom:4px}.moon-item:hover{background:#4d9fff1a}.moon-item .moon-dot{width:10px;height:10px;border-radius:50%;flex-shrink:0}.moon-item .moon-name{font-size:.85rem;color:var(--text-primary)}.moon-item .moon-info{font-size:.72rem;color:var(--text-dim);margin-left:auto}#comet-panel{position:absolute;top:56px;left:0;bottom:70px;width:320px;max-width:85vw;background:var(--bg-panel);-webkit-backdrop-filter:var(--panel-blur);backdrop-filter:var(--panel-blur);border-right:1px solid var(--border);border-radius:0 var(--radius-lg) var(--radius-lg) 0;z-index:25;overflow-y:auto;padding:20px;box-shadow:4px 0 30px #00000080;transition:transform .4s cubic-bezier(.4,0,.2,1),opacity .35s ease}#comet-panel.hidden{transform:translate(-110%);opacity:0;pointer-events:none}.comet-panel-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.comet-panel-header h2{font-size:1.2rem;font-weight:500;color:var(--text-primary);letter-spacing:.5px}.comet-list{display:flex;flex-direction:column;gap:10px}.comet-card{background:#ffffff08;border:1px solid rgba(77,159,255,.12);border-radius:var(--radius);padding:14px;cursor:pointer;transition:all var(--transition)}.comet-card:hover{background:#4d9fff14;border-color:var(--border-hover);box-shadow:var(--shadow-accent)}.comet-card.active{border-color:var(--accent);background:#4d9fff1f;box-shadow:0 0 16px #4d9fff33}.comet-card h3{font-size:.95rem;font-weight:500;color:#fff;margin-bottom:4px}.comet-card .comet-type{font-size:.72rem;color:var(--text-dim);border:1px solid rgba(255,255,255,.08);padding:1px 8px;border-radius:10px;display:inline-block;margin-bottom:6px;background:#ffffff08}.comet-card .comet-desc{font-size:.82rem;color:var(--text-secondary);line-height:1.5;margin-bottom:8px}.comet-card .comet-actions{display:flex;gap:6px;flex-wrap:wrap}.comet-card .comet-btn{background:#4d9fff14;border:1px solid rgba(77,159,255,.15);color:var(--accent-light);padding:5px 12px;border-radius:var(--radius-sm);cursor:pointer;font-size:.78rem;font-family:var(--font);transition:all var(--transition)}.comet-card .comet-btn:hover{background:#4d9fff33;color:#fff}.comet-card .comet-btn.active{background:#4d9fff4d;border-color:var(--accent)}#bottom-bar{position:absolute;bottom:0;left:0;width:100%;z-index:20;background:linear-gradient(0deg,rgba(4,8,16,.92) 0%,rgba(4,8,16,.7) 80%,transparent 100%);-webkit-backdrop-filter:var(--panel-blur);backdrop-filter:var(--panel-blur);border-top:1px solid rgba(77,159,255,.08);padding:8px 20px 12px}#timeline-bar{margin-bottom:8px;transition:height .3s ease,opacity .3s ease;overflow:hidden}#timeline-bar.hidden{height:0;opacity:0;pointer-events:none;margin:0}#timeline-bar:not(.hidden){height:60px}#timeline-track{position:relative;width:100%;height:50px;background:#ffffff08;border-radius:var(--radius-sm);overflow-x:auto;overflow-y:hidden;white-space:nowrap;padding:6px 12px}#timeline-marker{position:absolute;top:0;bottom:0;width:2px;background:var(--accent);box-shadow:0 0 8px var(--accent);z-index:2;left:50%;pointer-events:none}#timeline-events{display:flex;gap:8px;height:100%;align-items:center;padding-bottom:4px}.timeline-event{display:flex;flex-direction:column;align-items:center;justify-content:flex-start;min-width:90px;padding:6px 10px;background:#4d9fff0f;border:1px solid rgba(77,159,255,.12);border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);white-space:normal;text-align:center}.timeline-event:hover{background:#4d9fff26;border-color:var(--border-hover);box-shadow:var(--shadow-accent)}.timeline-event.active{background:#4d9fff33;border-color:var(--accent)}.timeline-event .event-icon{font-size:1.3rem;margin-bottom:2px}.timeline-event .event-year{font-size:.72rem;color:var(--accent-light);font-weight:600}.timeline-event .event-name{font-size:.68rem;color:var(--text-secondary);line-height:1.2}.time-controls-row{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.time-left,.time-center,.time-right{display:flex;align-items:center;gap:6px}.time-center{flex:1;justify-content:flex-start}.tc-btn{background:#ffffff0f;border:1px solid rgba(255,255,255,.12);color:var(--text-secondary);padding:6px 14px;border-radius:var(--radius-sm);cursor:pointer;font-size:.8rem;font-family:var(--font);transition:all var(--transition)}.tc-btn:hover{background:#4d9fff26;color:#fff;border-color:var(--border-hover)}.tc-btn.active,.tc-btn.play-btn.playing{background:#4d9fff33;border-color:var(--accent);color:var(--accent-light)}.speed-btn{padding:6px 10px;font-size:.78rem}.speed-display{min-width:52px;text-align:center;font-size:.95rem;font-weight:600;color:var(--accent-light);text-shadow:0 0 10px rgba(77,159,255,.4);padding:3px 10px;background:#4d9fff14;border-radius:var(--radius-sm)}#time-input{background:#040a1cb3;border:1px solid rgba(77,159,255,.2);color:var(--text-primary);padding:6px 12px;border-radius:var(--radius-sm);font-size:.82rem;font-family:var(--font);min-width:155px;letter-spacing:.3px}#time-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 12px #4d9fff26}.date-display{font-size:.82rem;color:var(--text-secondary);letter-spacing:.5px}#scale-notice{position:absolute;bottom:80px;left:50%;transform:translate(-50%);font-size:.72rem;color:var(--text-dim);letter-spacing:.5px;background:#04081099;padding:4px 14px;border-radius:12px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:15;transition:opacity .3s ease}#scale-notice.hidden{opacity:0;pointer-events:none}#loading-overlay{animation:autoFadeOut 0s ease 5s forwards}@keyframes autoFadeOut{to{opacity:0;pointer-events:none}}@media (max-width: 900px){#top-nav{padding:8px 12px}.nav-title{display:none}.nav-tab{padding:6px 10px;font-size:.75rem}#side-panel{width:100%;top:auto;bottom:0;max-height:60vh;border-radius:var(--radius-lg) var(--radius-lg) 0 0;border-left:none;border-top:1px solid var(--border)}#side-panel.hidden{transform:translateY(110%)}#comet-panel{width:100%;top:auto;bottom:0;max-height:60vh;border-radius:var(--radius-lg) var(--radius-lg) 0 0;border-right:none;border-top:1px solid var(--border)}#comet-panel.hidden{transform:translateY(-110%)}.time-left,.time-center,.time-right{flex-wrap:wrap}.nav-actions{display:flex;flex-wrap:wrap;gap:6px}}@media (max-width: 640px){.nav-tabs{gap:2px}.nav-tab{padding:5px 8px;font-size:.7rem}#side-panel{padding:14px}.side-actions{gap:4px}.side-btn{padding:6px 10px;font-size:.78rem}.time-controls-row{gap:6px}.tc-btn{padding:5px 10px;font-size:.74rem}#time-input{min-width:120px}}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:#0003}::-webkit-scrollbar-thumb{background:#4d9fff4d;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#4d9fff80}


/* Mobile CTA: Login/Register buttons */
#mobile-cta{position:absolute;top:62px;left:12px;z-index:15;display:none;gap:10px;padding:8px 16px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius);-webkit-backdrop-filter:var(--panel-blur);backdrop-filter:var(--panel-blur)}
.cta-btn{text-decoration:none;font-size:.82rem;font-weight:500;font-family:var(--font);padding:8px 18px;border-radius:var(--radius-sm);transition:all var(--transition);white-space:nowrap;cursor:pointer}
.cta-login{background:#4d9fff26;border:1px solid rgba(77,159,255,.3);color:var(--accent-light)}
.cta-login:hover{background:#4d9fff4d;color:#fff;box-shadow:0 0 12px #4d9fff33}
.cta-register{background:#4d9fff40;border:1px solid rgba(77,159,255,.5);color:#fff}
.cta-register:hover{background:#4d9fff66;box-shadow:0 0 12px #4d9fff33}
@media (max-width:900px){#mobile-cta{display:flex;top:56px;left:0;right:0;transform:none;justify-content:flex-start;padding:6px 12px;background:var(--bg-panel);border-top:none;border-left:none;border-right:none;border-radius:0}}
@media (max-width:480px){.cta-btn{font-size:.78rem;padding:7px 14px}}
@media(max-width:900px){.nav-tabs{display:none!important}#scale-switcher{display:none!important}#btn-size-compare{display:none!important}.nav-actions .login-btn{display:none!important}}
@media(max-width:640px){#bottom-bar{display:none!important}}