/* Necklace page. Plain CSS on top of styles.css tokens; no Tailwind. */
html, body { height: 100%; overflow: hidden; overscroll-behavior: none; }
body.app { min-height: 100dvh; height: 100dvh; overflow: hidden; user-select: none; -webkit-user-select: none; }

:root {
  --safe-t: env(safe-area-inset-top, 0px);
  --safe-r: env(safe-area-inset-right, 0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-l: env(safe-area-inset-left, 0px);
  --gutter: 16px;
  --panel-w: 380px;
  --ease: cubic-bezier(.16, 1, .3, 1);
}

/* ---- Header ---- */
#top {
  position: fixed; z-index: 20; top: 0; left: 0; right: 0;
  display: flex; align-items: center; gap: 12px;
  padding: calc(var(--safe-t) + 12px) calc(var(--safe-r) + var(--gutter)) 0 calc(var(--safe-l) + var(--gutter));
  pointer-events: none;
}
#top > * { pointer-events: auto; }
#top .brand { display: flex; align-items: center; gap: 8px; }
#top .brand-name { font-size: 22px; font-weight: 300; letter-spacing: .08em; color: var(--gold); }
#top .top-title { margin-left: auto; }

/* ---- Stage ---- */
#stage { position: fixed; inset: 0; z-index: 1; overflow: hidden; touch-action: none; }
#gl { position: absolute; inset: 0; width: 100%; height: 100%; display: block; outline: none; touch-action: none; cursor: grab; }
#gl:active { cursor: grabbing; }
[data-state="hover"] #gl { cursor: pointer; }

#labels { position: absolute; inset: 0; pointer-events: none; }
.hs-label {
  position: absolute; left: 0; top: 0; width: 44px; height: 44px; margin: -22px 0 0 -22px;
  display: grid; place-items: center; padding: 0; border: 0; background: transparent; color: var(--paper);
  border-radius: 50%; cursor: pointer; pointer-events: auto; will-change: transform;
}
.hs-label[hidden] { display: none; }
.hs-dot { width: 14px; height: 14px; border-radius: 50%; border: 1.5px solid rgb(var(--sodium-rgb) / .0); transition: transform .2s var(--ease), border-color .2s ease; }
.hs-label:hover .hs-dot, .hs-label.is-hover .hs-dot { transform: scale(1.4); border-color: var(--sodium); }
.hs-label:focus-visible { outline: 3px solid rgb(var(--sodium-rgb) / .7); outline-offset: 0; border-radius: 50%; }
.hs-name {
  position: absolute; left: 50%; top: 100%; transform: translate(-50%, 2px);
  font: 700 .6875rem var(--font-mono); letter-spacing: .04em; text-transform: uppercase; white-space: nowrap;
  padding: 3px 8px; border-radius: 12px; background: rgb(var(--ink-rgb) / .7); color: var(--paper);
  opacity: 0; transition: opacity .2s ease; pointer-events: none;
}
.hs-label:focus-visible .hs-name, .hs-label.is-hover .hs-name { opacity: 1; }
.hs-label.is-active .hs-name { opacity: 1; color: var(--sodium); }

/* ---- Tooltip ---- */
#tooltip {
  position: absolute; left: 0; top: 0; z-index: 12; max-width: min(280px, calc(100vw - 24px)); pointer-events: none;
  display: flex; flex-direction: column; gap: 4px; padding: 10px 14px; border-radius: 18px;
  font-size: .8125rem; line-height: 1.35; color: var(--paper);
  border: 1.2px solid rgb(182 221 230 / .38);
  background: linear-gradient(180deg, rgb(24 38 66 / .9), rgb(14 24 44 / .92));
  -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
}
#tooltip[hidden] { display: none; }
#tooltip strong { font: 700 .6875rem var(--font-mono); letter-spacing: .06em; text-transform: uppercase; color: var(--sodium); }
#tooltip::after {
  content: ''; position: absolute; left: var(--arrow-x, 50%); top: 100%; width: 10px; height: 10px; margin: -5px 0 0 -5px;
  transform: rotate(45deg); background: rgb(14 24 44); border: 1.2px solid rgb(182 221 230 / .38); border-top: 0; border-left: 0;
}
#tooltip.is-below::after { top: 0; margin-top: -5px; transform: rotate(225deg); }

/* ---- Hint chip ---- */
#hint {
  position: absolute; left: 50%; bottom: calc(var(--safe-b) + 150px); transform: translateX(-50%); margin: 0; z-index: 5;
  color: var(--paper); border: 1.2px solid rgb(182 221 230 / .38); background: rgb(var(--dusk-rgb) / .6);
  -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px); white-space: nowrap; pointer-events: none;
}
#hint[hidden] { display: none; }

/* ---- Front / Back toggle ---- */
#flip {
  position: fixed; z-index: 20; top: calc(var(--safe-t) + 12px); left: 50%; transform: translateX(-50%);
  min-height: 44px; padding: 4px; gap: 0; font-size: .875rem; box-shadow: none;
}
#flip:active { transform: translateX(-50%) scale(.98); }
#flip[hidden] { display: none; }
#flip .seg { padding: 8px 16px; border-radius: 20px; color: var(--mist); transition: background-color .25s ease, color .25s ease; }
#flip .seg.is-on { color: var(--ink); background: linear-gradient(180deg, rgb(134 234 240 / .85), rgb(69 187 203 / .7)); }

/* ---- Sensor list ---- */
#list {
  position: fixed; z-index: 15; left: 50%; bottom: calc(var(--safe-b) + 20px); transform: translateX(-50%);
  display: flex; gap: 10px; max-width: calc(100vw - 2 * var(--gutter)); transition: left .5s var(--ease), transform .5s var(--ease);
}
#list[hidden] { display: none; }
.list-btn { min-height: 52px; padding: 0 18px 0 12px; gap: 10px; font-size: .9375rem; box-shadow: none; }
.list-ic { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: rgb(255 255 255 / .12); }
.list-txt { display: flex; flex-direction: column; align-items: flex-start; line-height: 1.15; }
.list-name { font-weight: 600; font-size: .9375rem; }
.list-tag { font-size: .6875rem; color: var(--mist); }
.list-btn.is-hover { filter: brightness(1.2); }
.list-btn[aria-pressed="true"] { border-color: rgb(212 246 249 / .75); background: linear-gradient(180deg, rgb(134 234 240 / .3), rgb(69 187 203 / .22)); }
.list-btn[aria-pressed="true"] .list-ic { background: var(--sodium); color: var(--ink); }

/* ---- Panel ---- */
#panel {
  position: fixed; z-index: 18; top: calc(var(--safe-t) + 72px); right: calc(var(--safe-r) + var(--gutter)); bottom: calc(var(--safe-b) + 92px);
  width: var(--panel-w); max-width: calc(100vw - 2 * var(--gutter)); overflow-y: auto; padding: 22px; display: flex; flex-direction: column; gap: 16px;
  opacity: 0; visibility: hidden; transform: translateX(24px);
  transition: opacity .35s ease, transform .5s var(--ease), visibility 0s linear .5s;
}
#panel.is-open { opacity: 1; visibility: visible; transform: none; transition: opacity .35s ease, transform .5s var(--ease); }
.panel-head { display: flex; align-items: flex-start; gap: 12px; }
.panel-ic { display: grid; place-items: center; flex: none; width: 44px; height: 44px; border-radius: 50%; background: rgb(var(--sodium-rgb) / .16); color: var(--sodium); }
.panel-titles { flex: 1; min-width: 0; }
.panel-titles h2 { margin: 4px 0 0; font-size: 1.375rem; line-height: 1.2; letter-spacing: -0.03em; }
.panel-body p { margin: 0 0 10px; font-size: .9375rem; line-height: 1.5; color: var(--paper); }
.panel-body p:last-child { margin-bottom: 0; }
.facts { margin: 0; display: grid; gap: 0; border-top: 1px solid rgb(var(--line-rgb) / .8); }
.facts > div { display: grid; gap: 4px; padding: 11px 0; border-bottom: 1px solid rgb(var(--line-rgb) / .8); }
.facts dd { margin: 0; font-size: .8125rem; line-height: 1.4; color: var(--paper); }
.panel-back { margin-top: auto; min-height: 48px; font-size: .9375rem; box-shadow: none; }

/* While a panel is open on desktop the list slides left of it. */
@media (min-width: 720px) {
  [data-state="focused"] #list { left: calc((100vw - var(--panel-w) - var(--gutter)) / 2); }
}

/* ---- Loading, errors, fallback ---- */
#loading {
  position: fixed; inset: 0; z-index: 40; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px;
  background: linear-gradient(180deg, #0a1222 0%, #050911 100%); transition: opacity .5s ease;
}
#loading.is-done { opacity: 0; pointer-events: none; }
#loading[hidden] { display: none; }
#loading #loadLogo { animation: nkPulse 1.6s ease-in-out infinite; }
@keyframes nkPulse { 50% { opacity: .45; } }
#err { position: fixed; z-index: 30; left: var(--gutter); right: var(--gutter); top: calc(var(--safe-t) + 72px); margin: 0; text-align: center; font-size: .9375rem; font-weight: 600; color: var(--amber); }
#err[hidden] { display: none; }
#fallback {
  position: fixed; z-index: 25; inset: calc(var(--safe-t) + 112px) var(--gutter) var(--safe-b); margin: 0 auto; max-width: 560px; padding: 0 0 24px 0; list-style: none;
  overflow-y: auto; display: grid; gap: 14px; align-content: start; counter-reset: fb;
}
#fallback[hidden] { display: none; }
#fallback li { counter-increment: fb; position: relative; padding: 18px 18px 18px 56px; border-radius: var(--radius); border: 1.2px solid rgb(182 221 230 / .38); background: linear-gradient(180deg, rgb(156 195 228 / .17), rgb(54 71 111 / .16)); }
#fallback li::before { content: counter(fb); position: absolute; left: 16px; top: 18px; width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; background: rgb(var(--sodium-rgb) / .18); color: var(--sodium); font: 700 .8125rem var(--font-mono); }
#fallback h2 { margin: 0 0 6px; font-size: 1.0625rem; }
#fallback p { margin: 0 0 8px; font-size: .875rem; line-height: 1.5; color: var(--mist); }
#fallback .fb-tip { color: var(--paper); }

/* ---- Mobile: bottom sheet and icon-only pills ---- */
@media (max-width: 719.98px) {
  :root { --gutter: 12px; }
  #top .top-title { display: none; }
  #top .brand { margin-left: 0; }
  #flip { left: auto; right: calc(var(--safe-r) + var(--gutter)); transform: none; }
  #flip:active { transform: scale(.98); }
  #flip .seg { padding: 8px 12px; }
  #list { gap: 8px; bottom: calc(var(--safe-b) + 12px); }
  .list-btn { width: 52px; padding: 0; justify-content: center; }
  .list-txt { display: none; }
  .list-ic { background: transparent; }
  #hint { bottom: calc(var(--safe-b) + 84px); }
  #panel {
    top: auto; left: var(--gutter); right: var(--gutter); bottom: calc(var(--safe-b) + 76px); width: auto; max-width: none;
    max-height: 45vh; max-height: 45dvh; padding: 18px; gap: 12px; transform: translateY(24px);
  }
  #panel.is-open { transform: none; }
  .panel-titles h2 { font-size: 1.1875rem; }
  .panel-back { display: none; }
  #fallback { top: calc(var(--safe-t) + 128px); }
}

@media (prefers-reduced-motion: reduce) {
  #panel, #panel.is-open, #list, .hs-dot, .hs-name, #loading, #flip .seg { transition-duration: 0s !important; }
  #loading #loadLogo { animation: none; }
}
#top .icon-btn { color: var(--paper); }

/* ---- Compatibility with the shared stylesheet ----
   styles.css no longer ships .icon-btn, .pill, .eyebrow, .mono or --font-mono / --radius, so this page defines
   what it needs here, using the shared tokens and the 8px / 16px / full radius scale. */
:root { --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace; --radius: 16px; }
.mono { font-family: var(--font-mono); }
.eyebrow { font: 500 .75rem var(--font-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--mist); }
.icon-btn {
  display: inline-grid; place-items: center; width: 44px; height: 44px; flex: none; border-radius: 999px;
  color: var(--paper); background: rgb(255 255 255 / .06); border: 1px solid rgb(255 255 255 / .14);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
}
.icon-btn:hover { background: rgb(255 255 255 / .12); }
.pill {
  display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border-radius: 999px;
  font: 700 .6875rem var(--font-mono); letter-spacing: .04em; text-transform: uppercase; color: var(--paper);
  background: rgb(255 255 255 / .06); border: 1px solid rgb(255 255 255 / .14);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
}
#tooltip { border-radius: 16px; }
#panel { border-radius: 16px; }
#fallback li { border-radius: 16px; border: 1px solid rgb(255 255 255 / .1); background: rgb(255 255 255 / .04); }
#list button, #flip { border-color: rgb(255 255 255 / .14); }
#flip, .list-btn {
  color: var(--paper); background: rgb(255 255 255 / .06); border: 1px solid rgb(255 255 255 / .14);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
}
.list-btn:hover { background: rgb(255 255 255 / .12); }
/* The panel sits over the 3D board, so keep it nearly opaque for readable text. */
#panel { background: rgb(14 22 40 / .94); border: 1px solid rgb(255 255 255 / .1); -webkit-backdrop-filter: blur(18px); backdrop-filter: blur(18px); }