/* ==========================================================================
   Gesture Control — design tokens
   ========================================================================== */
:root {
  --bg: #0b0e14;
  --panel: #12161f;
  --panel-raised: #171c27;
  --border: #232a38;
  --border-soft: #1a2029;

  --text: #e7ecf3;
  --text-dim: #8b93a3;
  --text-faint: #565f70;

  --accent-next: #8cff9b;      /* open hand / go */
  --accent-next-dim: #2c4a30;
  --accent-back: #ffb454;      /* fist / back */
  --accent-back-dim: #4a3a20;
  --accent-data: #5cc8ff;      /* skeleton / neutral telemetry */
  --accent-danger: #ff6b6b;

  --font-display: "Space Grotesk", "Inter", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --radius: 10px;
  --radius-sm: 6px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

body {
  background-image:
    linear-gradient(var(--border-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-soft) 1px, transparent 1px);
  background-size: 42px 42px;
  background-position: center;
  background-attachment: fixed;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

button { font-family: inherit; }

:focus-visible {
  outline: 2px solid var(--accent-data);
  outline-offset: 2px;
  border-radius: 4px;
}

.mono { font-family: var(--font-mono); }

/* ==========================================================================
   Layout shell
   ========================================================================== */
.console {
  max-width: 1280px;
  margin: 0 auto;
  padding: 28px 24px 40px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

/* ---------- Topbar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
}

.topbar__brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.topbar__mark {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  border-radius: 8px;
  background:
    radial-gradient(circle at 32% 30%, var(--accent-next) 0 3px, transparent 3.5px),
    radial-gradient(circle at 68% 30%, var(--accent-data) 0 3px, transparent 3.5px),
    radial-gradient(circle at 50% 68%, var(--accent-back) 0 3px, transparent 3.5px);
  border: 1px solid var(--border);
  background-color: var(--panel-raised);
}

.topbar__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 1.1;
  margin: 0;
  letter-spacing: -0.01em;
}

.topbar__subtitle {
  margin: 3px 0 0;
  font-size: 0.82rem;
  color: var(--text-dim);
}

.topbar__status {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 7px 13px;
  border: 1px solid var(--border);
  border-radius: 100px;
  background: var(--panel);
  font-size: 0.8rem;
  color: var(--text-dim);
}

.topbar__status .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-faint);
  flex-shrink: 0;
}

.topbar__status[data-state="loading"] .dot {
  background: var(--accent-data);
  animation: pulse 1.1s ease-in-out infinite;
}
.topbar__status[data-state="ready"] .dot { background: var(--accent-next); }
.topbar__status[data-state="error"] .dot { background: var(--accent-danger); }
.topbar__status[data-state="ready"] { color: var(--text); }

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

/* ---------- Grid ---------- */
.grid {
  display: grid;
  grid-template-columns: minmax(320px, 480px) 1fr;
  gap: 22px;
  align-items: start;
}

@media (max-width: 880px) {
  .grid { grid-template-columns: 1fr; }
}

/* ==========================================================================
   Monitor (camera panel)
   ========================================================================== */
.monitor {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.monitor__frame {
  position: relative;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
}

.bracket {
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid var(--accent-data);
  opacity: 0.7;
}
.bracket--tl { top: 6px; left: 6px; border-right: none; border-bottom: none; border-top-left-radius: 4px; }
.bracket--tr { top: 6px; right: 6px; border-left: none; border-bottom: none; border-top-right-radius: 4px; }
.bracket--bl { bottom: 6px; left: 6px; border-right: none; border-top: none; border-bottom-left-radius: 4px; }
.bracket--br { bottom: 6px; right: 6px; border-left: none; border-top: none; border-bottom-right-radius: 4px; }

.monitor__viewport {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #05070a;
  isolation: isolate;
}

#webcam {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scaleX(-1); /* mirror for natural interaction */
  z-index: 1;
}

#overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  transform: scaleX(-1);
}

.monitor__scanline {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.025) 0px,
    rgba(255, 255, 255, 0.025) 1px,
    transparent 1px,
    transparent 3px
  );
  mix-blend-mode: overlay;
}

.monitor__placeholder,
.monitor__error {
  position: absolute;
  inset: 0;
  z-index: 4;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-align: center;
  padding: 24px;
  color: var(--text-dim);
  background: #0d1017;
}

.monitor__placeholder svg { color: var(--text-faint); margin-bottom: 4px; }
.monitor__placeholder p { margin: 0; color: var(--text); font-weight: 500; }
.monitor__placeholder span { font-size: 0.82rem; max-width: 240px; }
.monitor__placeholder strong { color: var(--accent-data); font-weight: 600; }

.monitor__error { color: var(--accent-danger); }
.monitor__error svg { color: var(--accent-danger); margin-bottom: 2px; }
.monitor__error p { margin: 0; color: var(--text); font-weight: 500; font-size: 0.9rem; max-width: 260px; }

/* ---------- Readout strip ---------- */
.readout {
  display: grid;
  grid-template-columns: 1fr 1fr auto auto;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.readout__cell {
  background: var(--panel);
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.readout__cell--mono { min-width: 74px; }

.readout__label {
  font-size: 0.68rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.readout__value {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.readout__value.mono { font-family: var(--font-mono); font-weight: 500; }

#gestureCell[data-gesture="open"] .readout__value { color: var(--accent-next); }
#gestureCell[data-gesture="fist"] .readout__value { color: var(--accent-back); }

#actionCell[data-action="next"] .readout__value { color: var(--accent-next); }
#actionCell[data-action="back"] .readout__value { color: var(--accent-back); }

/* ---------- Controls ---------- */
.controls {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font-size: 0.86rem;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.08s ease, border-color 0.15s ease, background 0.15s ease;
}

.btn:hover:not(:disabled) { border-color: var(--text-faint); }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn--primary {
  background: var(--accent-next);
  border-color: var(--accent-next);
  color: #0b1a0f;
}
.btn--primary:hover:not(:disabled) { background: #a3ffb0; border-color: #a3ffb0; }

.btn--danger {
  color: var(--accent-danger);
  border-color: var(--border);
}
.btn--danger:hover:not(:disabled) { border-color: var(--accent-danger); }

.btn--ghost { color: var(--text-dim); }

/* ---------- Instructions ---------- */
.instructions {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 14px;
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  background: var(--panel);
}

.instructions p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 8px;
}

.instructions strong { color: var(--text); }

/* ==========================================================================
   Deck (demo screens)
   ========================================================================== */
.deck {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 100%;
}

.deck__rail {
  display: flex;
  gap: 8px;
}

.deck__rail button {
  flex: 1;
  height: 4px;
  border: none;
  border-radius: 2px;
  background: var(--border);
  cursor: pointer;
  padding: 0;
  position: relative;
}

.deck__rail button::after {
  content: attr(data-index);
  position: absolute;
  top: -22px;
  left: 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-faint);
}

.deck__rail button[aria-selected="true"] { background: var(--accent-data); }
.deck__rail button[data-complete="true"] { background: var(--text-faint); }

.deck__stage {
  position: relative;
  flex: 1;
  min-height: 420px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 20% 15%, rgba(92, 200, 255, 0.06), transparent 45%),
    var(--panel);
  overflow: hidden;
}

.card {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 48px 56px;
  opacity: 0;
  transform: translateX(24px);
  transition: opacity 0.28s ease, transform 0.28s ease;
  pointer-events: none;
}

.card[data-active="true"] {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

.card__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--accent-data);
  margin: 0 0 10px;
}

.card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1.12;
  margin: 0 0 14px;
  letter-spacing: -0.01em;
  max-width: 15ch;
}

.card__body {
  font-size: 0.98rem;
  line-height: 1.6;
  color: var(--text-dim);
  max-width: 46ch;
  margin: 0 0 4px;
}

.card__icon {
  width: 46px;
  height: 46px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel-raised);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--accent-data);
}

/* ---------- Deck nav ---------- */
.deck__nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.deck__page { font-size: 0.85rem; color: var(--text-dim); }

.deck__nav-signals {
  display: flex;
  gap: 10px;
}

.signal {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 13px;
  border-radius: 100px;
  border: 1px solid var(--border);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-faint);
  background: var(--panel);
  transition: all 0.12s ease;
}

.signal--back.is-firing {
  color: var(--accent-back);
  border-color: var(--accent-back);
  background: var(--accent-back-dim);
}
.signal--next.is-firing {
  color: var(--accent-next);
  border-color: var(--accent-next);
  background: var(--accent-next-dim);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-faint);
  padding-top: 6px;
}

/* ---------- Small screens ---------- */
@media (max-width: 520px) {
  .card { padding: 32px 26px; }
  .readout { grid-template-columns: 1fr 1fr; }
  .readout__cell--mono:nth-of-type(3) { border-top: 1px solid var(--border); }
}