:root {
  color-scheme: dark;
  --space: #030713;
  --panel: rgba(7, 15, 35, 0.76);
  --line: rgba(122, 220, 255, 0.3);
  --cyan: #73e4ff;
  --gold: #ffd76a;
  --muted: #a8b8d2;
  --text: #f7fbff;
}

* { box-sizing: border-box; }
html, body { width: 100%; height: 100%; margin: 0; overflow: hidden; background: var(--space); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; touch-action: none; }
button, select, a { font: inherit; }
button, select { color: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: 0.52; filter: saturate(0.45); }
.app, .spacekit-container { position: absolute; inset: 0; }
.spacekit-container { background: radial-gradient(circle at 50% 45%, rgba(45, 79, 158, 0.16), transparent 36%), #02040b; }
.spacekit-container canvas { display: block; width: 100%; height: 100%; outline: none; }
.spacekit__object-label { z-index: 3; pointer-events: none; padding: 4px 7px !important; border: 1px solid rgba(119, 218, 255, 0.3); border-radius: 999px; background: rgba(4, 10, 25, 0.72); color: #f7fbff !important; font-family: inherit !important; font-size: 11px !important; white-space: nowrap; backdrop-filter: blur(6px); }
.vignette { position: absolute; inset: 0; pointer-events: none; background: linear-gradient(180deg, rgba(2, 5, 14, 0.82), transparent 20%, transparent 70%, rgba(2, 5, 14, 0.78)), radial-gradient(circle, transparent 46%, rgba(1, 3, 10, 0.66) 100%); }

.topbar { position: absolute; z-index: 14; top: max(12px, env(safe-area-inset-top)); left: 14px; right: 14px; display: flex; align-items: center; gap: 10px; pointer-events: none; }
.topbar > * { pointer-events: auto; }
.brand { min-width: 0; display: flex; flex-direction: column; margin-right: auto; text-shadow: 0 2px 16px #000; }
.brand-kicker, .panel-kicker { color: var(--cyan); font-size: 0.68rem; font-weight: 800; letter-spacing: 0.16em; text-transform: uppercase; }
.brand strong { margin-top: 2px; font-size: clamp(1rem, 2.2vw, 1.34rem); letter-spacing: 0.03em; }
.icon-button { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid rgba(132, 219, 255, 0.34); border-radius: 50%; background: rgba(5, 13, 31, 0.72); color: #fff; text-decoration: none; font-weight: 800; backdrop-filter: blur(12px); box-shadow: 0 8px 24px rgba(0, 0, 0, 0.24); }
.icon-button:hover, .icon-button:focus-visible, button:hover, button:focus-visible, select:focus-visible { border-color: rgba(255, 215, 106, 0.85); outline: none; }
.top-menu { position: absolute; top: 50px; right: 0; width: 180px; display: grid; gap: 5px; padding: 8px; border: 1px solid rgba(122, 220, 255, 0.3); border-radius: 14px; background: rgba(4, 12, 30, 0.96); box-shadow: 0 18px 46px rgba(0,0,0,.46); backdrop-filter: blur(14px); }
.top-menu button, .top-menu a { min-height: 38px; display: flex; align-items: center; border: 0; border-radius: 9px; padding: 7px 10px; background: transparent; color: #dceaff; text-align: left; text-decoration: none; font-weight: 720; }
.top-menu button:hover, .top-menu button:focus-visible, .top-menu a:hover, .top-menu a:focus-visible { background: rgba(115, 228, 255, 0.12); color: #fff; }
.quick-navigation { position: absolute; z-index: 11; top: max(62px, calc(env(safe-area-inset-top) + 50px)); left: 50%; max-width: calc(100vw - 32px); display: flex; align-items: center; gap: 5px; padding: 5px 7px; border: 1px solid rgba(122, 220, 255, 0.26); border-radius: 999px; background: rgba(3, 11, 29, 0.72); box-shadow: 0 9px 28px rgba(0,0,0,.28); backdrop-filter: blur(12px); transform: translateX(-50%); overflow-x: auto; scrollbar-width: none; white-space: nowrap; }
.quick-navigation::-webkit-scrollbar { display: none; }
.quick-navigation button { min-height: 28px; border: 0; border-radius: 999px; padding: 4px 9px; background: transparent; color: #b9cae2; font-size: 0.74rem; font-weight: 760; }
.quick-navigation button:not(:disabled):hover, .quick-navigation button:not(:disabled):focus-visible { background: rgba(115, 228, 255, 0.12); color: #fff; }
.quick-navigation button:disabled { opacity: 1; color: var(--gold); filter: none; cursor: default; }
.quick-navigation .quick-navigation-separator { color: rgba(168, 184, 210, 0.55); font-size: 0.7rem; }
.quick-navigation .quick-navigation-action { border: 1px solid rgba(255, 215, 106, 0.48); background: rgba(255, 215, 106, 0.14); color: #ffe59b; }
.quick-navigation .quick-navigation-action:disabled { border-color: rgba(168, 184, 210, 0.2); background: rgba(168, 184, 210, 0.08); color: #8292a9; }
.quick-navigation .quick-navigation-panel { color: var(--cyan); }
.quick-navigation .quick-navigation-panel.active { background: rgba(115, 228, 255, 0.16); color: #fff; }

.glass-panel { z-index: 8; border: 1px solid var(--line); background: linear-gradient(145deg, rgba(11, 24, 54, 0.86), rgba(3, 9, 24, 0.72)); box-shadow: 0 20px 55px rgba(0, 0, 0, 0.34); backdrop-filter: blur(14px); }
.collapsible-panel { transition: width 0.22s ease, padding 0.22s ease, border-radius 0.22s ease; }
.panel-toggle { position: absolute; z-index: 2; top: 11px; display: inline-flex; min-width: 68px; min-height: 34px; align-items: center; justify-content: center; gap: 4px; border: 1px solid rgba(122, 220, 255, 0.34); border-radius: 999px; padding: 5px 9px; background: rgba(3, 12, 30, 0.82); color: var(--cyan); font-size: 0.75rem; font-weight: 800; box-shadow: 0 6px 18px rgba(0, 0, 0, 0.24); backdrop-filter: blur(10px); }
.panel-toggle-left, .panel-toggle-right { right: 11px; }
.panel-toggle-icon { font-size: 1.18rem; line-height: 0.8; }
.collapsible-panel.is-collapsed { display: none; }
.collapsible-panel.is-collapsed .panel-toggle { position: static; min-height: 38px; }
.scene-panel.is-collapsed { right: auto; }
.info-panel.is-collapsed { right: 18px; left: auto; }
.scene-panel { position: absolute; top: 108px; left: 18px; width: min(410px, calc(100vw - 36px)); padding: 18px; border-radius: 18px; }
.scene-panel:not(.is-collapsed) .panel-content { max-height: min(72vh, 760px); overflow-y: auto; padding-right: 54px; scrollbar-width: thin; scrollbar-color: rgba(122, 220, 255, 0.45) transparent; }
.scene-panel h1 { margin: 8px 0; font-size: clamp(1.45rem, 3vw, 2.2rem); line-height: 1.12; }
.scene-panel p, .info-panel p, .guide-dialog p, .guide-dialog li { color: var(--muted); line-height: 1.6; }
.scene-actions { display: flex; gap: 9px; margin-top: 16px; }
.primary-button, .secondary-button, .compact-button, .speed-button, .mobile-actions button { min-height: 40px; border: 1px solid rgba(122, 220, 255, 0.4); border-radius: 12px; padding: 9px 14px; background: rgba(21, 47, 87, 0.74); color: #f6fbff; font-weight: 750; }
.primary-button { border-color: rgba(255, 215, 106, 0.62); background: linear-gradient(135deg, #ffd76a, #f1a733); color: #172038; box-shadow: 0 9px 28px rgba(244, 178, 55, 0.23); }
.secondary-button { background: rgba(11, 25, 55, 0.8); }
.primary-button:disabled, .secondary-button:disabled { cursor: not-allowed; opacity: 0.42; box-shadow: none; }
.galaxy-guide-steps { margin-top: 15px; padding: 13px; border: 1px solid rgba(122, 220, 255, 0.24); border-radius: 14px; background: linear-gradient(145deg, rgba(13, 35, 70, 0.88), rgba(7, 18, 42, 0.82)); box-shadow: inset 0 1px 0 rgba(255,255,255,.04); }
.galaxy-guide-progress { display: flex; align-items: center; justify-content: space-between; gap: 10px; color: var(--cyan); font-size: 0.73rem; font-weight: 800; letter-spacing: 0.08em; }
.galaxy-guide-progress strong { padding: 3px 8px; border-radius: 999px; background: rgba(122, 220, 255, 0.12); color: #e9faff; letter-spacing: 0.03em; }
.galaxy-guide-steps h2 { margin: 9px 0 5px; color: #fff3c6; font-size: 1.02rem; line-height: 1.35; }
.galaxy-guide-steps p { margin: 0; font-size: 0.86rem; line-height: 1.58; }
.galaxy-guide-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 12px; }
.galaxy-guide-actions button { min-width: 0; min-height: 38px; padding: 7px 10px; }

.info-panel { position: absolute; right: 18px; top: 108px; width: min(330px, calc(100vw - 36px)); padding: 16px; border-radius: 18px; }
.info-panel:not(.is-collapsed) .panel-content { max-height: min(64vh, 620px); overflow-y: auto; padding-right: 5px; scrollbar-width: thin; scrollbar-color: rgba(122, 220, 255, 0.45) transparent; }
.info-panel:not(.is-collapsed) .info-heading { padding-right: 58px; }
.info-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.info-heading h2 { margin: 5px 0 10px; font-size: 1.55rem; }
.visited-badge { padding: 5px 8px; border-radius: 999px; background: rgba(255, 215, 106, 0.15); color: var(--gold); font-size: 0.75rem; font-weight: 800; white-space: nowrap; }
.scale-note { margin: 12px 0 0; padding: 10px 11px; border-left: 3px solid var(--gold); border-radius: 4px 9px 9px 4px; background: rgba(255, 215, 106, 0.08); font-size: 0.83rem; }

.solar-controls { position: absolute; z-index: 9; left: 50%; bottom: 58px; width: min(780px, calc(100vw - 36px)); padding: 12px; border-radius: 16px; transform: translateX(-50%); }
.target-row, .time-row { display: flex; align-items: center; gap: 8px; }
.target-row { margin-bottom: 9px; }
.target-row label { color: var(--muted); font-size: 0.86rem; }
.target-row select { flex: 1; min-width: 110px; min-height: 40px; border: 1px solid rgba(122, 220, 255, 0.35); border-radius: 11px; padding: 0 10px; background: rgba(3, 10, 26, 0.88); }
.time-row { flex-wrap: wrap; }
.compact-button, .speed-button { min-height: 34px; padding: 6px 10px; font-size: 0.82rem; }
.speed-button.active { border-color: var(--gold); color: var(--gold); }
#dateReadout { margin-left: auto; color: var(--muted); font-size: 0.82rem; }

.status-bar { position: absolute; z-index: 9; left: 18px; right: 18px; bottom: max(14px, env(safe-area-inset-bottom)); display: flex; justify-content: space-between; gap: 12px; pointer-events: none; color: #aebdd4; font-size: 0.75rem; text-shadow: 0 2px 8px #000; }
.status-bar span { display: flex; align-items: center; gap: 6px; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: #62f2a1; box-shadow: 0 0 12px #62f2a1; }
.mobile-actions { display: none; }
.local-group-navigator, .galaxy-navigator { position: absolute; z-index: 9; left: 18px; bottom: 52px; width: min(390px, calc(100vw - 36px)); display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 8px; padding: 9px; border-radius: 14px; }
.local-group-navigator label, .galaxy-navigator label { color: var(--muted); font-size: 0.8rem; }
.local-group-navigator select, .galaxy-navigator select, .system-controls select { min-width: 0; min-height: 40px; border: 1px solid rgba(122, 220, 255, 0.35); border-radius: 11px; padding: 0 10px; background: rgba(3, 10, 26, 0.88); }
.local-group-navigator label, .galaxy-navigator label, .local-group-navigator small, .galaxy-navigator small { display: none; }
.local-group-navigator button, .galaxy-navigator button { grid-column: auto; min-height: 40px; padding: 7px 12px; }
.local-group-navigator small, .galaxy-navigator small { grid-column: 1 / -1; color: #8fa3bf; line-height: 1.35; }
.system-controls { position: absolute; z-index: 9; left: 50%; bottom: 28px; width: min(650px, calc(100vw - 36px)); display: flex; flex-wrap: wrap; gap: 8px; padding: 12px; border-radius: 16px; transform: translateX(-50%); }
.system-controls .target-row { flex: 1 1 100%; margin: 0; }
.system-controls .target-row select { flex: 1; }
.app[data-scene="system"] .info-panel.is-collapsed { display: none; }
#returnSystemGalaxyButton { display: none; }
.pan-control { display: none; position: absolute; z-index: 12; right: 22px; bottom: 48px; flex-direction: column; align-items: flex-end; gap: 7px; }
.app[data-scene="local-group"] .pan-pad,
.app[data-scene="solar"] .pan-pad,
.app[data-scene="galaxy"] .pan-pad { display: grid; }
.app[data-scene="local-group"] .pan-control,
.app[data-scene="solar"] .pan-control,
.app[data-scene="galaxy"] .pan-control { display: flex; }
.move-toggle { min-width: 58px; min-height: 38px; border: 1px solid rgba(117, 226, 255, 0.42); border-radius: 999px; padding: 7px 12px; background: rgba(8, 24, 54, 0.9); color: var(--cyan); font-weight: 800; box-shadow: 0 10px 28px rgba(0,0,0,.3); }
.pan-pad { position: static; grid-template-columns: repeat(3, 42px); gap: 4px; padding: 6px; border: 1px solid rgba(122, 220, 255, 0.3); border-radius: 15px; background: linear-gradient(145deg, rgba(11, 24, 54, 0.9), rgba(3, 9, 24, 0.84)); box-shadow: 0 14px 40px rgba(0, 0, 0, 0.32); backdrop-filter: blur(12px); }
.pan-pad button { min-height: 42px; border: 1px solid rgba(117, 226, 255, 0.42); border-radius: 11px; background: rgba(8, 24, 54, 0.88); color: #fff; font-size: 1.02rem; font-weight: 800; touch-action: none; -webkit-tap-highlight-color: transparent; }
.pan-pad button:nth-child(1) { grid-column: 2; }
.pan-pad button:nth-child(2) { grid-column: 1; grid-row: 2; }
.pan-pad button:nth-child(3) { grid-column: 3; grid-row: 2; }
.pan-pad button:nth-child(4) { grid-column: 2; grid-row: 3; }
.pan-pad button:active { background: rgba(255, 205, 91, 0.82); color: #172038; transform: scale(0.94); }
.status-bar span:nth-child(n+2) { display: none; }
.mobile-actions { display: none !important; }

.loading-screen, .transition-screen { position: absolute; z-index: 40; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px; background: #030713; transition: opacity 0.45s ease, visibility 0.45s ease; }
.loading-screen p { margin: 0; color: var(--muted); }
.loading-screen.ready { opacity: 0; visibility: hidden; pointer-events: none; }
.loading-orbit { position: relative; width: 72px; height: 72px; border: 1px solid rgba(115, 228, 255, 0.32); border-radius: 50%; animation: spin 2.2s linear infinite; }
.loading-orbit::before { content: ""; position: absolute; width: 8px; height: 8px; margin: 4px 0 0 8px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 16px var(--gold); }
.loading-orbit span { display: block; width: 12px; height: 12px; margin: 29px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 25px var(--cyan); }
.transition-screen { z-index: 35; visibility: hidden; opacity: 0; overflow: hidden; background: radial-gradient(circle, rgba(70, 130, 255, 0.25), #02040c 58%); }
.transition-screen.active { visibility: visible; opacity: 1; }
.transition-screen strong { z-index: 2; font-size: clamp(1.25rem, 4vw, 2rem); letter-spacing: 0.08em; }
.warp-lines { position: absolute; inset: -40%; background: repeating-conic-gradient(from 0deg, transparent 0 4deg, rgba(115, 228, 255, 0.13) 4.5deg 5deg); animation: warp 1.4s linear infinite; }

.guide-dialog { width: min(540px, calc(100vw - 28px)); border: 1px solid rgba(122, 220, 255, 0.4); border-radius: 20px; padding: 0; background: rgba(8, 18, 41, 0.98); color: var(--text); box-shadow: 0 32px 90px rgba(0, 0, 0, 0.7); }
.guide-dialog::backdrop { background: rgba(0, 3, 13, 0.74); backdrop-filter: blur(5px); }
.guide-dialog form { position: relative; padding: 24px; }
.guide-dialog h2 { margin: 8px 40px 14px 0; }
.guide-dialog ol { padding-left: 1.25rem; }
.guide-dialog li + li { margin-top: 7px; }
.dialog-close { position: absolute; right: 15px; top: 13px; width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 50%; background: rgba(255,255,255,.05); color: #fff; font-size: 1.4rem; }
.dialog-action { width: 100%; margin-top: 8px; }
.error-panel { position: absolute; z-index: 60; left: 50%; top: 50%; width: min(440px, calc(100vw - 32px)); padding: 22px; border: 1px solid rgba(255, 120, 146, 0.55); border-radius: 18px; background: #190b18; transform: translate(-50%, -50%); text-align: center; }
.error-panel p { color: #e7bdc8; line-height: 1.55; }
.error-panel a { color: var(--cyan); }
.hidden, [hidden] { display: none !important; }

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes warp { to { transform: rotate(10deg) scale(1.08); } }

@media (max-width: 760px) {
  .topbar { left: 9px; right: 9px; top: max(8px, env(safe-area-inset-top)); gap: 7px; }
  .icon-button { width: 38px; height: 38px; }
  .brand-kicker { font-size: 0.56rem; }
  .brand strong { font-size: 0.98rem; }
  .quick-navigation { top: max(57px, calc(env(safe-area-inset-top) + 49px)); max-width: calc(100vw - 18px); }
  .quick-navigation button { padding: 4px 7px; font-size: 0.69rem; }
  .scene-panel { top: 101px; left: 9px; width: calc(100vw - 18px); padding: 13px 14px; border-radius: 14px; }
  .scene-panel:not(.is-collapsed) .panel-content { max-height: min(46vh, 380px); padding-right: 46px; }
  .scene-panel.is-collapsed { right: auto; width: auto; padding: 6px; border-radius: 999px; }
  .scene-panel h1 { margin: 5px 0; font-size: 1.22rem; }
  .scene-panel p { margin: 0; font-size: 0.82rem; line-height: 1.46; }
  .scene-actions { margin-top: 10px; }
  .scene-actions .primary-button, .scene-actions .secondary-button { display: none; }
  .galaxy-guide-steps { margin-top: 10px; padding: 10px; }
  .galaxy-guide-steps h2 { margin-top: 7px; font-size: 0.94rem; }
  .galaxy-guide-steps p { font-size: 0.79rem; line-height: 1.48; }
  .galaxy-guide-actions { margin-top: 9px; }
  .galaxy-guide-actions .primary-button, .galaxy-guide-actions .secondary-button { display: block; min-height: 36px; font-size: 0.76rem; }
  .info-panel { top: auto; right: 9px; left: 9px; bottom: 68px; width: auto; padding: 12px 13px; border-radius: 14px; }
  .info-panel:not(.is-collapsed) .panel-content { max-height: min(38vh, 300px); }
  .info-panel.is-collapsed { right: 9px; left: auto; width: auto; padding: 6px; border-radius: 999px; }
  .collapsible-panel.is-collapsed .panel-toggle { min-height: 42px; }
  .info-heading h2 { margin: 3px 0 5px; font-size: 1.18rem; }
  .info-panel p { margin: 0; font-size: 0.79rem; line-height: 1.42; }
  .scale-note { margin-top: 7px !important; padding: 7px 8px; }
  .app[data-scene="solar"] .info-panel { bottom: 188px; }
  .solar-controls { left: 9px; right: 9px; bottom: max(8px, env(safe-area-inset-bottom)); width: auto; padding: 9px; transform: none; }
  .target-row { margin-bottom: 6px; }
  .target-row label { display: none; }
  .target-row select { min-height: 36px; }
  .compact-button, .speed-button { min-height: 32px; padding: 5px 8px; }
  #dateReadout { width: 100%; margin: 0; text-align: center; font-size: 0.75rem; }
  .status-bar { display: none; }
  .desktop-hint { display: none !important; }
  .mobile-actions { position: absolute; z-index: 11; right: 9px; left: 9px; bottom: max(10px, env(safe-area-inset-bottom)); gap: 7px; }
  .mobile-actions button { flex: 1; min-width: 0; min-height: 42px; padding: 7px 10px; font-size: 0.78rem; box-shadow: 0 10px 26px rgba(0,0,0,.3); }
  .app[data-scene="solar"] .mobile-actions { bottom: 132px; }
  .local-group-navigator, .galaxy-navigator { right: 9px; bottom: 70px; left: 9px; width: auto; padding: 9px; }
  .local-group-navigator small, .galaxy-navigator small { display: none; }
  .app[data-scene="local-group"] .info-panel,
  .app[data-scene="galaxy"] .info-panel { bottom: 191px; }
  .system-controls { right: 9px; bottom: max(8px, env(safe-area-inset-bottom)); left: 9px; width: auto; padding: 9px; transform: none; }
  .system-controls .target-row label { display: none; }
  .system-controls > button { flex: 1; min-height: 38px; padding: 6px 8px; font-size: 0.76rem; }
  .app[data-scene="system"] .info-panel { bottom: 132px; }
  .app[data-scene="system"] .mobile-actions { display: none; }
  .pan-control { right: 9px; top: 50%; bottom: auto; transform: translateY(-50%); }
  .pan-pad { grid-template-columns: repeat(3, 40px); gap: 3px; padding: 5px; }
  .pan-pad button { min-height: 40px; font-size: 0.95rem; }
  .pan-pad button:active { background: rgba(255, 205, 91, 0.82); color: #172038; transform: scale(0.94); }
}

@media (min-width: 761px) and (max-width: 1160px) and (min-height: 621px) {
  .app[data-scene="solar"] .solar-controls { right: 210px; left: auto; width: min(780px, calc(100vw - 250px)); transform: none; }
}

@media (max-height: 620px) and (orientation: landscape) {
  .scene-panel { max-width: 340px; }
  .info-panel { top: 62px; right: 8px; bottom: auto; left: auto; width: 300px; }
  .solar-controls { bottom: 38px; }
  .status-bar { bottom: 6px; }
  .mobile-actions { right: 8px; bottom: 45px; }
  .app[data-scene="solar"] .mobile-actions { bottom: 124px; }
  .pan-control { right: 10px; top: 50%; bottom: auto; transform: translateY(-50%); }
  .pan-pad { grid-template-columns: repeat(3, 38px); gap: 3px; padding: 4px; }
  .pan-pad button { min-height: 36px; font-size: 0.9rem; }
  .local-group-navigator, .galaxy-navigator { left: 8px; width: 320px; }
  .system-controls { right: 8px; bottom: 8px; left: auto; width: 330px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; }
}