:root {
  /* Dark-only palette (base) */
  --bg: #000000;
  --fg: #eeeeee;
  --muted: #a9a9a9;
  --ring-bg: #2f2f2f;

  /* These are starting tints; JS gently breathes them */
  --ring-active: #c8c8c8;
  --accent-wax: #e1b12c;  /* warm */
  --accent-wane: #00a8cc; /* cool */

  --overlay-bg: rgba(0, 0, 0, 0.85);

  --stroke-hr: 2px;
  --stroke-min: 1.5px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
html, body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

#app {
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: max(12px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right))
           max(12px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));
  position: relative;
  touch-action: manipulation;
}

#clock {
  width: min(96svmin, 900px);
  height: min(96svmin, 900px);
  display: block;
}

/* Info button */
#infoBtn {
  position: fixed;
  right: calc(16px + env(safe-area-inset-right));
  bottom: calc(16px + env(safe-area-inset-bottom));
  width: 48px; height: 48px;
  border-radius: 50%;
  border: 1px solid var(--ring-bg);
  background: transparent;
  color: var(--fg);
  font: 600 18px/1 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  letter-spacing: 0.02em;
  cursor: pointer;
  opacity: 0.75;
  transition: opacity 180ms ease, border-color 180ms ease, transform 120ms ease;
  -webkit-tap-highlight-color: transparent;
}
#infoBtn:hover { opacity: 1; border-color: var(--ring-active); }
#infoBtn:active { transform: translateY(1px); }

/* Overlay */
#overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay-bg);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
#overlay[aria-hidden="false"] { display: flex; }

.panel {
  width: min(720px, 96vw);
  max-height: min(86svh, 760px);
  border: 1px solid var(--ring-bg);
  background: #0d0d0d;
  color: var(--fg);
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}

.panel header {
  position: sticky; top: 0;
  background: #0d0d0d;
  display: grid; grid-template-columns: 1fr auto;
  align-items: center;
  padding: 12px 12px 0 12px;
  z-index: 1;
}
.brand {
  margin: 0;
  font-weight: 600;
  letter-spacing: 0.18em;
  font-size: clamp(18px, 2.6vmin, 22px);
  /* Subtle "engraved" luminosity */
  background: linear-gradient(180deg, #e6e6e6 0%, #9f9f9f 60%, #cfcfcf 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

#closeOverlay {
  background: transparent;
  color: var(--fg);
  border: none;
  padding: 8px 12px;
  margin: 0;
  font: 700 26px/1 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  cursor: pointer;
  opacity: 0.9;
  -webkit-tap-highlight-color: transparent;
}
#closeOverlay:hover { opacity: 1; }

.panel .content { padding: 8px 16px 16px 16px; }

.tagline { margin: 8px 4px 16px 4px; opacity: 0.9; color: #d5d5d5; }

.grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 12px 24px;
}
@media (max-width: 560px) { .grid { grid-template-columns: 1fr; } }

h2 {
  margin: 12px 0 4px 0; font-size: 12px;
  letter-spacing: 0.16em; text-transform: uppercase; opacity: 0.8;
}
.grid p { margin: 0 0 4px 0; color: var(--muted); line-height: 1.5; }

.panel footer {
  margin-top: 8px; padding-top: 8px;
  border-top: 1px solid var(--ring-bg);
}
.panel .note { margin: 0; font-size: 12px; color: var(--muted); opacity: 0.8; }

@media (prefers-reduced-motion: reduce) {
  #infoBtn, #closeOverlay { transition: none; }
}