:root {
  color-scheme: dark;
  --ar-bg: #05080c;
  --ar-bg-soft: #071018;
  --ar-panel: #0a151d;
  --ar-panel-raised: #0d1b24;
  --ar-ink: #eef6f8;
  --ar-muted: #93a9b2;
  --ar-faint: #617681;
  --ar-line: #263b46;
  --ar-line-strong: #3a5663;
  --ar-green: #80f0bd;
  --ar-cyan: #80c9dd;
  --ar-amber: #f0c777;
  --ar-red: #ff8c8c;
  --ar-shadow: rgba(0, 0, 0, .44);
  --bg: var(--ar-bg);
  --panel: var(--ar-panel);
  --panel-raised: var(--ar-panel-raised);
  --line: var(--ar-line);
  --line-strong: var(--ar-line-strong);
  --ink: var(--ar-ink);
  --muted: var(--ar-muted);
  --faint: var(--ar-faint);
  --green: var(--ar-green);
  --cyan: var(--ar-cyan);
  --amber: var(--ar-amber);
  --red: var(--ar-red);
  --surface-page: var(--ar-bg);
  --surface-section: var(--ar-bg-soft);
  --surface-card: var(--ar-panel);
  --surface-elevated: var(--ar-panel-raised);
  --surface-positive: #0a211b;
  --surface-warning: #211b10;
  --surface-technical: #081922;
  --border-muted: var(--ar-line);
  --border-active: var(--ar-green);
}

:root[data-theme="light"] {
  color-scheme: light;
  --ar-bg: #f4f7f7;
  --ar-bg-soft: #e9f0ef;
  --ar-panel: #ffffff;
  --ar-panel-raised: #edf5f4;
  --ar-ink: #102127;
  --ar-muted: #526b74;
  --ar-faint: #6f8289;
  --ar-line: #b9c9cb;
  --ar-line-strong: #8ca5a9;
  --ar-green: #0d7f5b;
  --ar-cyan: #126f85;
  --ar-amber: #9a640c;
  --ar-red: #b63838;
  --ar-shadow: rgba(16, 33, 39, .16);
  --surface-positive: #e4f4ec;
  --surface-warning: #fff3dc;
  --surface-technical: #e8f2f4;
}

html { background: var(--ar-bg); }

body {
  color: var(--ar-ink);
  background:
    radial-gradient(circle at 82% -12%, color-mix(in srgb, var(--ar-cyan) 30%, transparent) 0, transparent 34rem),
    linear-gradient(145deg, var(--ar-bg), var(--ar-bg-soft));
}

:root[data-theme="light"] body::before { opacity: .08; }

.journey-nav {
  position: sticky;
  z-index: 15;
  top: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 5px;
  border-top: 1px solid var(--ar-line);
  border-bottom: 1px solid var(--ar-line);
  background: color-mix(in srgb, var(--ar-bg) 92%, transparent);
  padding: 7px 0;
  backdrop-filter: blur(12px);
}

.journey-nav a,
.journey-nav button {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ar-line);
  border-left: 2px solid var(--ar-line);
  background: var(--ar-bg-soft);
  color: var(--ar-muted);
  padding: 8px 11px;
  font: 700 .57rem var(--mono, ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace);
  letter-spacing: .06em;
  text-transform: uppercase;
  cursor: pointer;
}

.journey-nav a:hover,
.journey-nav button:hover,
.journey-nav a[aria-current="page"] {
  border-color: var(--ar-green);
  background: var(--surface-positive);
  color: var(--ar-ink);
}

.journey-controls {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-left: auto;
}

.theme-toggle[aria-pressed="true"] {
  border-color: var(--ar-cyan);
  color: var(--ar-cyan);
}

.guide-button {
  color: var(--ar-green) !important;
}

.guide-button[hidden] { display: none; }

.ar-guide-panel {
  position: fixed;
  z-index: 40;
  right: 16px;
  bottom: 16px;
  width: min(390px, calc(100vw - 32px));
  border: 1px solid var(--ar-green);
  background: var(--ar-panel);
  box-shadow: 0 24px 70px var(--ar-shadow);
  padding: 15px;
}

.ar-guide-panel[hidden] { display: none; }

.ar-guide-kicker,
.ar-guide-count {
  margin: 0;
  color: var(--ar-green);
  font: 700 .6rem/1.4 var(--mono, ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace);
  letter-spacing: .12em;
  text-transform: uppercase;
}

.ar-guide-panel h2 {
  margin: 7px 0 6px;
  color: var(--ar-ink);
  font: 800 1.05rem/1.2 var(--display, "Arial Narrow", "Segoe UI", sans-serif);
  letter-spacing: 0;
  text-transform: none;
}

.ar-guide-panel p {
  margin: 0;
  color: var(--ar-muted);
  font: .7rem/1.55 var(--mono, ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace);
}

.ar-guide-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 13px;
}

.ar-guide-actions button {
  min-height: 36px;
  border: 1px solid var(--ar-line);
  background: var(--ar-bg-soft);
  color: var(--ar-ink);
  padding: 8px 10px;
  font: 700 .58rem var(--mono, ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace);
  letter-spacing: .06em;
  text-transform: uppercase;
  cursor: pointer;
}

.ar-guide-actions button:hover,
.ar-guide-actions button:focus-visible {
  border-color: var(--ar-green);
  color: var(--ar-green);
}

.ar-guide-actions .ar-guide-next {
  background: var(--ar-green);
  border-color: var(--ar-green);
  color: var(--ar-bg);
}

.ar-guide-actions .ar-guide-next:hover,
.ar-guide-actions .ar-guide-next:focus-visible {
  color: var(--ar-bg);
}

.single-next-action {
  margin-top: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--ar-line);
  padding-top: 18px;
}

.single-next-action .interactive-card {
  max-width: 560px;
}

:root[data-theme="light"] .panel,
:root[data-theme="light"] .data-card,
:root[data-theme="light"] .next-action-grid .interactive-card,
:root[data-theme="light"] .record-preview,
:root[data-theme="light"] .receipt-object,
:root[data-theme="light"] .integrity-panel,
:root[data-theme="light"] .proof-compare,
:root[data-theme="light"] .control-schematic,
:root[data-theme="light"] .contract-panel,
:root[data-theme="light"] .console-summary,
:root[data-theme="light"] .payload-panel,
:root[data-theme="light"] .flow-panel,
:root[data-theme="light"] .verification-grid article {
  background: var(--ar-panel);
  color: var(--ar-ink);
}

:root[data-theme="light"] pre,
:root[data-theme="light"] textarea,
:root[data-theme="light"] input,
:root[data-theme="light"] select,
:root[data-theme="light"] .state-line,
:root[data-theme="light"] .payload-link,
:root[data-theme="light"] .technical-link-row a,
:root[data-theme="light"] .contract-link,
:root[data-theme="light"] .preview-toolbar,
:root[data-theme="light"] .segmented-control span,
:root[data-theme="light"] .toggle-grid label,
:root[data-theme="light"] .preset-button,
:root[data-theme="light"] .graph-node {
  background: var(--ar-bg-soft);
  color: var(--ar-ink);
}

@media (max-width: 680px) {
  .journey-nav {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .journey-nav a,
  .journey-nav button {
    width: 100%;
    min-width: 0;
    text-align: center;
  }

  .journey-controls {
    display: grid;
    grid-column: 1 / -1;
    grid-template-columns: 1fr 1fr;
    margin-left: 0;
  }

  .ar-guide-panel {
    right: 10px;
    bottom: 10px;
    width: calc(100vw - 20px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .ar-guide-panel,
  .journey-nav a,
  .journey-nav button {
    transition: none !important;
  }
}