:root {
  color-scheme: dark;
  --ui: rgba(246, 250, 255, .94);
  --ui-muted: rgba(237, 246, 255, .62);
  --ui-faint: rgba(232, 244, 255, .34);
  --panel: rgba(6, 14, 24, .46);
  --panel-border: rgba(255, 255, 255, .16);
  --accent: 187 220 255;
  --ui-rest-opacity: 1;
  --transition: 1.6s cubic-bezier(.2,.65,.25,1);
}

* { box-sizing: border-box; }

html, body { width: 100%; min-height: 100%; margin: 0; }

body {
  overflow: hidden;
  background: #071018;
  color: var(--ui);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button, a { font: inherit; }
button { color: inherit; }

.observatory {
  position: relative;
  width: 100vw;
  height: 100svh;
  min-height: 560px;
  overflow: hidden;
  isolation: isolate;
  background: #071018;
}

.background-stack,
.background,
.background-shade,
#light-canvas,
.ui-shell { position: absolute; inset: 0; }

.background-stack { z-index: 0; }

.background {
  opacity: 0;
  background-position: center center;
  background-size: cover;
  transform: scale(1.015);
  transition: opacity var(--transition), transform 6s ease;
  will-change: opacity;
}
.background.is-active { opacity: 1; transform: scale(1); }
.background--river { background-image: url('./assets/009_river_night.png'); }
.background--forest { background-image: url('./assets/009_forest_light.png'); }
.background--sky { background-image: url('./assets/009_star_sky.png'); }

.background-shade {
  background:
    linear-gradient(180deg, rgba(2, 7, 14, .28) 0%, transparent 26%, transparent 68%, rgba(2, 7, 14, .22) 100%),
    linear-gradient(90deg, rgba(2, 7, 14, .22) 0%, transparent 22%, transparent 76%, rgba(2, 7, 14, .1) 100%);
  pointer-events: none;
}

#light-canvas {
  z-index: 1;
  width: 100%;
  height: 100%;
  pointer-events: none;
  mix-blend-mode: screen;
}

.ui-shell {
  z-index: 2;
  pointer-events: none;
  opacity: var(--ui-rest-opacity);
  transition: opacity .9s ease;
  text-shadow: 0 2px 18px rgba(0, 0, 0, .42);
}
.ui-shell.is-resting { --ui-rest-opacity: .18; }
.ui-shell:has(.info-panel:not([hidden])) { --ui-rest-opacity: 1; }

.masthead {
  position: absolute;
  top: max(22px, env(safe-area-inset-top));
  left: max(24px, env(safe-area-inset-left));
  right: max(24px, env(safe-area-inset-right));
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
}

.identity { max-width: min(520px, 56vw); }
.lab-link,
.scene-title,
.live-readout,
.scene-button,
.utility-button,
.eyebrow,
.updated-at {
  letter-spacing: .16em;
  text-transform: uppercase;
}

.lab-link {
  pointer-events: auto;
  display: inline-block;
  color: var(--ui-muted);
  text-decoration: none;
  font-size: 11px;
  font-weight: 650;
}
.lab-link:hover { color: var(--ui); }

h1 {
  margin: 8px 0 1px;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
  font-size: clamp(30px, 4.2vw, 64px);
  line-height: .95;
  letter-spacing: -.035em;
}

.scene-title {
  margin: 10px 0 0;
  color: var(--ui-muted);
  font-size: 10px;
}

.live-readout {
  min-width: 142px;
  padding-top: 2px;
  font-size: 9px;
  line-height: 1.5;
  color: var(--ui-muted);
  text-align: right;
}
.live-line,
.intensity-line { display: flex; align-items: center; justify-content: flex-end; gap: 8px; }
.intensity-line { margin-top: 5px; }
.intensity-line strong { min-width: 32px; color: var(--ui); font-size: 12px; font-variant-numeric: tabular-nums; }
.live-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgb(var(--accent));
  box-shadow: 0 0 12px rgba(var(--accent), .9);
  animation: live-pulse 2.4s ease-in-out infinite;
}
.live-readout.is-offline .live-dot { opacity: .4; animation: none; }

.scene-switcher {
  pointer-events: auto;
  position: absolute;
  left: 50%;
  bottom: max(30px, calc(env(safe-area-inset-bottom) + 18px));
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: clamp(10px, 2.2vw, 30px);
  padding: 10px 14px;
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 999px;
  background: rgba(3, 10, 18, .2);
  backdrop-filter: blur(10px);
}

.scene-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 0;
  padding: 8px 6px;
  background: transparent;
  color: var(--ui-muted);
  cursor: pointer;
  font-size: 9px;
  font-weight: 650;
  transition: color .3s ease, opacity .3s ease;
}
.scene-button::after {
  content: "";
  position: absolute;
  left: 7px;
  right: 7px;
  bottom: 1px;
  height: 1px;
  background: rgb(var(--accent));
  transform: scaleX(0);
  transform-origin: center;
  box-shadow: 0 0 8px rgba(var(--accent), .85);
  transition: transform .4s ease;
}
.scene-button.is-active { color: var(--ui); }
.scene-button.is-active::after { transform: scaleX(1); }
.scene-button:hover { color: var(--ui); }

.scene-mark { display: inline-block; opacity: .9; }
.scene-mark--river { width: 16px; height: 2px; border-top: 1px solid currentColor; border-bottom: 1px solid currentColor; transform: skewX(-20deg); }
.scene-mark--forest { width: 8px; height: 8px; border-radius: 50%; background: currentColor; box-shadow: 0 0 9px currentColor; opacity: .6; }
.scene-mark--sky { width: 10px; font-size: 10px; line-height: 1; text-align: center; text-shadow: 0 0 8px currentColor; }

.utility-actions {
  pointer-events: auto;
  position: absolute;
  right: max(24px, env(safe-area-inset-right));
  bottom: max(31px, calc(env(safe-area-inset-bottom) + 19px));
  display: flex;
  gap: 6px;
}
.utility-button {
  border: 0;
  border-bottom: 1px solid var(--ui-faint);
  padding: 7px 2px 5px;
  background: transparent;
  color: var(--ui-muted);
  cursor: pointer;
  font-size: 9px;
}
.utility-button:hover,
.utility-button:focus-visible { color: var(--ui); border-color: var(--ui); }

.info-panel {
  pointer-events: auto;
  position: absolute;
  top: max(84px, calc(env(safe-area-inset-top) + 64px));
  right: max(24px, env(safe-area-inset-right));
  width: min(390px, calc(100vw - 48px));
  max-height: calc(100svh - 170px);
  overflow: auto;
  padding: 26px 26px 24px;
  border: 1px solid var(--panel-border);
  border-radius: 18px;
  background: var(--panel);
  box-shadow: 0 22px 80px rgba(0, 0, 0, .28);
  backdrop-filter: blur(24px) saturate(125%);
  color: rgba(250, 252, 255, .88);
  text-shadow: none;
}
.info-close {
  position: absolute;
  top: 10px;
  right: 12px;
  border: 0;
  background: transparent;
  color: var(--ui-muted);
  font-size: 22px;
  cursor: pointer;
}
.info-panel h2 { margin: 8px 28px 12px 0; font-family: Georgia, "Times New Roman", serif; font-size: 25px; font-weight: 400; line-height: 1.25; }
.info-panel p { margin: 0 0 14px; color: rgba(247, 251, 255, .72); font-size: 13px; line-height: 1.75; }
.info-panel a { color: rgba(255,255,255,.9); }
.eyebrow { color: rgba(240,248,255,.48) !important; font-size: 9px !important; }
.data-list { margin: 20px 0; border-top: 1px solid rgba(255,255,255,.12); }
.data-list div { display: flex; justify-content: space-between; gap: 20px; padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,.1); }
.data-list dt { color: rgba(247,251,255,.58); font-size: 11px; }
.data-list dd { margin: 0; font-size: 11px; font-variant-numeric: tabular-nums; }
.updated-at { font-size: 9px !important; }
.mapping { padding-left: 12px; border-left: 1px solid rgba(var(--accent), .5); }
.retry-button { border: 1px solid rgba(255,255,255,.24); border-radius: 999px; padding: 8px 13px; background: transparent; color: var(--ui); cursor: pointer; font-size: 11px; }

.status {
  position: absolute;
  left: 50%;
  bottom: max(94px, calc(env(safe-area-inset-bottom) + 82px));
  transform: translateX(-50%);
  max-width: min(560px, calc(100vw - 48px));
  padding: 7px 11px;
  border-radius: 999px;
  background: rgba(3, 10, 18, .38);
  backdrop-filter: blur(12px);
  color: var(--ui-muted);
  font-size: 10px;
  text-align: center;
  transition: opacity .4s ease;
}
.status[hidden] { display: block; opacity: 0; pointer-events: none; }

.site-legal--009 {
  pointer-events: auto;
  position: absolute;
  left: max(24px, env(safe-area-inset-left));
  bottom: max(34px, calc(env(safe-area-inset-bottom) + 22px));
  margin: 0;
  color: var(--ui-muted);
  font-size: 9px;
  letter-spacing: .08em;
}
.site-legal--009 a { color: inherit; }

button:focus-visible,
a:focus-visible { outline: 1px solid rgb(var(--accent)); outline-offset: 4px; }

@keyframes live-pulse {
  0%, 100% { opacity: .45; transform: scale(.86); }
  50% { opacity: 1; transform: scale(1.08); }
}

@media (max-width: 720px) {
  .observatory { min-height: 480px; }
  .masthead { top: max(18px, env(safe-area-inset-top)); left: max(18px, env(safe-area-inset-left)); right: max(18px, env(safe-area-inset-right)); }
  .identity { max-width: 64vw; }
  .lab-link { font-size: 9px; }
  h1 { margin-top: 6px; font-size: clamp(25px, 9vw, 42px); }
  .scene-title { margin-top: 7px; font-size: 8px; }
  .live-readout { min-width: 86px; font-size: 7px; }
  .intensity-line span { display: none; }
  .intensity-line strong { font-size: 10px; }

  .scene-switcher {
    bottom: max(25px, calc(env(safe-area-inset-bottom) + 16px));
    gap: 5px;
    padding: 7px 8px;
  }
  .scene-button { gap: 5px; padding: 8px 5px; font-size: 8px; }
  .scene-mark--river { width: 11px; }
  .scene-mark--forest { width: 6px; height: 6px; }
  .scene-mark--sky { width: 7px; font-size: 8px; }

  .utility-actions { right: max(16px, env(safe-area-inset-right)); bottom: max(82px, calc(env(safe-area-inset-bottom) + 72px)); }
  .site-legal--009 { left: max(16px, env(safe-area-inset-left)); bottom: max(86px, calc(env(safe-area-inset-bottom) + 76px)); font-size: 8px; }
  .info-panel { top: max(76px, calc(env(safe-area-inset-top) + 58px)); right: 16px; width: calc(100vw - 32px); max-height: calc(100svh - 156px); padding: 22px 20px 20px; }
  .status { bottom: max(128px, calc(env(safe-area-inset-bottom) + 118px)); }
}

@media (max-width: 430px) {
  .identity h1 { max-width: 230px; }
  .scene-switcher { width: calc(100vw - 104px); justify-content: space-around; }
  .scene-button { flex: 1; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  .background,
  .ui-shell,
  .scene-button::after,
  .status { transition-duration: .01ms; }
  .live-dot { animation: none; opacity: .8; }
}