/* boplog interaction lab — monochrome day / night (mirrors main site tokens) */
:root,
html[data-theme="day"] {
  color-scheme: light;
  --ink: #f3f3f0;
  --paper: #fafaf8;
  --panel: #ffffff;
  --bg: var(--ink);
  --surface: var(--panel);
  --surface-hover: #efefe9;
  --text: #111111;
  --muted: #4f4f4b;
  --faint: rgba(81, 81, 76, 0.55);
  --line: rgba(16, 16, 16, 0.12);
  --line-dark: rgba(16, 16, 16, 0.22);
  --accent: #1c1c1c;
  --accent-soft: rgba(16, 16, 16, 0.08);
  --signal: #1c1c1c;
  --signal-soft: rgba(16, 16, 16, 0.06);
  --glow: rgba(16, 16, 16, 0.18);
  --activity-0: #ebedf0;
  --activity-1: #c6c6c1;
  --activity-2: #8e8e88;
  --activity-3: #4a4a46;
  --activity-4: #1c1c1c;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --dur-fast: 120ms;
  --dur: 180ms;
  --shell: min(720px, calc(100vw - 28px));
}

html[data-theme="night"] {
  color-scheme: dark;
  --ink: #030303;
  --paper: #080808;
  --panel: #101010;
  --bg: var(--ink);
  --surface: var(--panel);
  --surface-hover: #161616;
  --text: #efefec;
  --muted: #b8b8b2;
  --faint: rgba(184, 184, 178, 0.45);
  --line: rgba(235, 235, 235, 0.1);
  --line-dark: rgba(255, 255, 255, 0.18);
  --accent: #f3f3f0;
  --accent-soft: rgba(255, 255, 255, 0.1);
  --signal: #f3f3f0;
  --signal-soft: rgba(255, 255, 255, 0.08);
  --glow: rgba(243, 243, 240, 0.22);
  --activity-0: #161616;
  --activity-1: #2e2e2c;
  --activity-2: #5a5a56;
  --activity-3: #a0a09a;
  --activity-4: #f3f3f0;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
.skip {
  position: absolute;
  left: 12px;
  top: 12px;
  z-index: 100;
  padding: 8px 12px;
  background: var(--panel);
  border: 1px solid var(--line-dark);
  transform: translateY(-160%);
}
.skip:focus { transform: none; }

/* ── top bar ── */
.top {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.top__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: var(--shell);
  margin: 0 auto;
  padding: 12px 0 8px;
}
.top__brand {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 8px;
  font: 12px/1.3 var(--mono);
}
.top__brand a {
  color: var(--muted);
  text-decoration: none;
}
.top__brand a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.top__sep { color: var(--faint); }
.badge {
  display: inline-block;
  padding: 2px 6px;
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  color: var(--faint);
  font: 9px/1.2 var(--mono);
  letter-spacing: 0.08em;
  text-transform: lowercase;
}
.top__note {
  width: var(--shell);
  margin: 0 auto;
  padding: 0 0 12px;
  color: var(--faint);
  font: 11px/1.45 var(--mono);
}
.top__url {
  display: block;
  margin-top: 4px;
  word-break: break-all;
  color: var(--muted);
}

/* theme toggle (matches main site spirit) */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 28px;
  padding: 0 10px 0 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font: 10px/1 var(--mono);
  cursor: pointer;
}
.theme-toggle__thumb {
  width: 18px;
  height: 18px;
  border-radius: 999px;
  background: var(--accent);
  transition: transform 220ms var(--ease-out);
}
html[data-theme="night"] .theme-toggle__thumb { transform: translateX(2px) scale(0.92); }
.theme-toggle:hover { border-color: var(--line-dark); color: var(--text); }

/* ── layout ── */
.lab {
  width: var(--shell);
  margin: 0 auto;
  padding: 18px 0 80px;
  display: grid;
  gap: 16px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  overflow: hidden;
}
.card__head {
  padding: 14px 16px 10px;
  border-bottom: 1px solid var(--line);
}
.card__head h2 {
  margin: 0;
  font: 600 13px/1.3 var(--mono);
  letter-spacing: 0.01em;
}
.card__head p {
  margin: 6px 0 0;
  color: var(--faint);
  font: 11px/1.45 var(--mono);
}
.card__body { padding: 14px 16px 16px; }
.card__body--stage { padding-bottom: 12px; }
.card__body--row {
  display: grid;
  gap: 14px;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font: 11px/1.3 var(--mono);
}
.controls label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  user-select: none;
}
.controls input { accent-color: var(--accent); }

/* ── agent strip ── */
.agent-strip {
  padding: 12px 12px 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
}
.agent-strip__label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  color: var(--muted);
  font: 11px/1.3 var(--mono);
  letter-spacing: 0.02em;
}
.agent-strip__live {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 0 var(--accent-soft);
}
.agent-strip.is-live .agent-strip__live {
  animation: live-pulse 2.4s var(--ease-in-out) infinite;
}
@keyframes live-pulse {
  0%, 100% { box-shadow: 0 0 0 0 var(--accent-soft); opacity: 1; }
  50% { box-shadow: 0 0 0 6px transparent; opacity: 0.7; }
}
.agent-strip__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.agent-strip__item {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  min-height: 28px;
}
.agent-strip__item canvas {
  display: block;
  width: 20px;
  height: 20px;
}
.agent-strip__name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font: 12px/1.3 var(--mono);
  color: var(--text);
}
.agent-strip__state {
  color: var(--faint);
  font: 10px/1.2 var(--mono);
  text-transform: lowercase;
}
.agent-strip__foot {
  margin: 12px 0 0;
  color: var(--faint);
  font: 10px/1.4 var(--mono);
}

/* ── orb gallery ── */
.orb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px;
}
.orb-card {
  display: grid;
  justify-items: center;
  gap: 8px;
  padding: 14px 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
}
.orb-card canvas { display: block; }
.orb-card__label {
  color: var(--muted);
  font: 11px/1.2 var(--mono);
}
.orb-card__sizes {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* ── activity demo ── */
.act__modes {
  display: inline-flex;
  margin-bottom: 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
}
.act__mode {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--faint);
  font: 11px/1 var(--mono);
  padding: 8px 12px;
  cursor: pointer;
}
.act__mode.is-active {
  background: var(--accent-soft);
  color: var(--text);
}
.act__frame {
  position: relative;
  padding: 10px 8px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
  overflow: hidden;
}
.act__map {
  --weeks: 20;
  display: grid;
  grid-template-columns: repeat(var(--weeks), minmax(0, 1fr));
  gap: 3px;
}
.act__week {
  display: grid;
  grid-template-rows: repeat(7, 1fr);
  gap: 3px;
}
.act__cell {
  aspect-ratio: 1;
  border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--text) 6%, transparent);
  background: var(--activity-0);
  padding: 0;
}
.act__cell[data-level="1"] { background: var(--activity-1); }
.act__cell[data-level="2"] { background: var(--activity-2); }
.act__cell[data-level="3"] { background: var(--activity-3); }
.act__cell[data-level="4"] { background: var(--activity-4); }
.act__cell.is-pulse {
  animation: cell-breathe 3.2s var(--ease-in-out) infinite;
}
@keyframes cell-breathe {
  0%, 100% { opacity: 0.55; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.12); }
}
.act__scan {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--accent);
  opacity: 0.55;
  pointer-events: none;
  animation: scan-sweep 520ms var(--ease-out) forwards;
}
@keyframes scan-sweep {
  from { top: 8%; opacity: 0.7; }
  to { top: 92%; opacity: 0; }
}
.act__meta {
  margin: 10px 0 0;
  color: var(--faint);
  font: 10px/1.4 var(--mono);
}

/* ── rows ── */
.rows {
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg);
}
.row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 10px;
  padding: 12px 12px;
  border-bottom: 1px solid var(--line);
  transition: background var(--dur) var(--ease-in-out);
}
.row:last-child { border-bottom: 0; }
.row:active,
.row:hover { background: var(--surface-hover); }
.row.is-enter {
  animation: row-in 320ms var(--ease-out) both;
}
@keyframes row-in {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: none; }
}
.row__date {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--faint);
  font: 10px/1.2 var(--mono);
}
.row__date canvas {
  display: block;
  width: 16px;
  height: 16px;
  flex: 0 0 auto;
}
.row__main h3 {
  margin: 0;
  font: 600 13px/1.35 var(--mono);
}
.row__main p {
  margin: 3px 0 0;
  color: var(--muted);
  font: 12px/1.4 var(--sans);
}
.row__path {
  margin-top: 4px;
  color: var(--faint);
  font: 10px/1.3 var(--mono);
}

/* ── atmosphere stage ── */
.stage {
  position: relative;
  min-height: 180px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
  overflow: hidden;
}
.stage__lattice {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.55;
  pointer-events: none;
}
.stage__copy {
  position: relative;
  z-index: 1;
  max-width: 42ch;
  padding: 28px 20px;
}
.stage__kicker {
  margin: 0 0 8px;
  color: var(--faint);
  font: 10px/1.2 var(--mono);
  letter-spacing: 0.08em;
}
.stage__copy p:last-child {
  margin: 0;
  color: var(--muted);
  font: 13px/1.5 var(--sans);
}
.stage__grain {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  opacity: 0.07;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}
html[data-theme="night"] .stage__grain {
  opacity: 0.12;
  mix-blend-mode: screen;
}

/* ── misc ── */
.misc-block {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
}
.misc-block--stamp {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 18px 12px;
}
.misc-label {
  margin: 0;
  font: 12px/1.3 var(--mono);
}
.misc-hint {
  margin: 4px 0 0;
  color: var(--faint);
  font: 10px/1.4 var(--mono);
}
#pixel-stamp {
  display: block;
  width: 48px;
  height: 48px;
  image-rendering: pixelated;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
}

/* ── empty ── */
.empty {
  display: grid;
  justify-items: center;
  gap: 10px;
  padding: 28px 16px;
  border: 1px dashed var(--line-dark);
  border-radius: 10px;
  background: var(--bg);
  color: var(--faint);
  font: 12px/1.4 var(--mono);
  text-align: center;
}
.empty__orb {
  display: block;
  width: 40px;
  height: 40px;
}
.btn {
  appearance: none;
  margin-top: 4px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font: 11px/1 var(--mono);
  cursor: pointer;
}
.btn:hover {
  color: var(--text);
  border-color: var(--line-dark);
}

/* ── notes ── */
.prose ul {
  margin: 0;
  padding-left: 1.15em;
  color: var(--muted);
  font: 12px/1.55 var(--sans);
}
.prose li + li { margin-top: 6px; }
.prose code {
  font: 11px/1 var(--mono);
  color: var(--text);
}
.prose__foot {
  margin: 14px 0 0;
  color: var(--faint);
  font: 11px/1.4 var(--mono);
}
.prose__foot a { color: var(--muted); }

/* ── scroll rail ── */
.scroll-rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 2px;
  z-index: 50;
  background: var(--line);
  pointer-events: none;
}
.scroll-rail__fill {
  width: 100%;
  height: 0%;
  background: var(--accent);
  opacity: 0.75;
  transition: height 60ms linear;
}

@media (max-width: 520px) {
  .top__inner, .top__note, .lab { width: min(100vw - 20px, 720px); }
  .row { grid-template-columns: 64px minmax(0, 1fr); padding: 11px 10px; }
  .orb-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .agent-strip__item { grid-template-columns: 20px minmax(0, 1fr); }
  .agent-strip__state { grid-column: 2; margin-top: -4px; }
}

@media (prefers-reduced-motion: reduce) {
  .agent-strip.is-live .agent-strip__live,
  .act__cell.is-pulse,
  .row.is-enter,
  .act__scan {
    animation: none !important;
  }
}