/* ── Reset & base ─────────────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --green:        #00ff41;
  --green-dim:    rgba(0, 255, 65, 0.3);
  --green-faint:  rgba(0, 255, 65, 0.08);
  --red:          #ff3030;
  --yellow:       #ffaa00;
  --bg-deep:      #0a0e0a;
  --bg-mid:       #1a1f1a;
  --bg-panel:     rgba(10, 14, 10, 0.85);
  --font:         'JetBrains Mono', 'Courier New', monospace;
  --header-h:     48px;
  --controls-h:   56px;
  --sidebar-w:    280px;
}

html, body {
  height: 100%;
  overflow: hidden;
  background: linear-gradient(135deg, var(--bg-deep) 0%, var(--bg-mid) 100%);
  color: var(--green);
  font-family: var(--font);
  font-size: clamp(0.75rem, 2vw, 1rem);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  padding:
    env(safe-area-inset-top)
    env(safe-area-inset-right)
    env(safe-area-inset-bottom)
    env(safe-area-inset-left);
}

/* Subtle full-page scanline texture */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.04) 2px,
    rgba(0, 0, 0, 0.04) 4px
  );
  pointer-events: none;
  z-index: 1000;
}

/* ── App shell ────────────────────────────────────────────────────────────── */
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}

/* ── HUD header ───────────────────────────────────────────────────────────── */
.hud-header {
  flex: 0 0 var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: var(--bg-panel);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--green-dim);
  z-index: 10;
}

.hud-logo {
  font-size: clamp(0.7rem, 1.5vw, 0.85rem);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--green);
}

.logo-bracket { color: rgba(0, 255, 65, 0.5); }

.hud-center {
  font-size: clamp(0.6rem, 1.4vw, 0.75rem);
  font-weight: 600;
  letter-spacing: 0.25em;
  opacity: 0.7;
}

.hud-status-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  transition: background 0.3s;
}

.status-dot.status-active    { background: var(--red);    animation: pulse-dot 1.2s ease-in-out infinite; }
.status-dot.status-error     { background: var(--red); }
.status-dot.status-requesting{ background: var(--yellow); animation: pulse-dot 0.6s ease-in-out infinite; }

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.25; }
}

.hud-status {
  font-size: clamp(0.65rem, 1.4vw, 0.8rem);
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--green);
  transition: color 0.3s;
  min-width: 6ch;
  text-align: right;
}

.hud-status.status-active     { color: var(--red); }
.hud-status.status-error      { color: var(--red); }
.hud-status.status-requesting { color: var(--yellow); }

/* ── App body (camera + sidebar) ──────────────────────────────────────────── */
.app-body {
  flex: 1;
  display: flex;
  overflow: hidden;
  min-height: 0;
}

/* ── Camera container ─────────────────────────────────────────────────────── */
.camera-container {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: #000;
  border-left: 1px solid var(--green-dim);
  border-right: 1px solid var(--green-dim);
  min-width: 0;
}

#videoFeed { display: none; }

#videoCanvas,
#overlayCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

#overlayCanvas { z-index: 2; }

/* ── HUD info panel (top-left in camera) ──────────────────────────────────── */
.hud-info-panel {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 7;
  background: var(--bg-panel);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--green-dim);
  padding: 6px 10px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 130px;
}

.hud-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.hud-label {
  font-size: clamp(0.5rem, 1.1vw, 0.6rem);
  font-weight: 600;
  letter-spacing: 0.12em;
  color: rgba(0, 255, 65, 0.55);
  min-width: 5ch;
}

.hud-val {
  font-size: clamp(0.6rem, 1.3vw, 0.75rem);
  font-weight: 700;
  color: var(--green);
  min-width: 3.5ch;
  text-align: right;
  transition: color 0.2s;
}

.hud-unit {
  font-size: clamp(0.45rem, 1vw, 0.55rem);
  color: rgba(0, 255, 65, 0.45);
  letter-spacing: 0.08em;
}

.hud-divider {
  height: 1px;
  background: var(--green-dim);
  margin: 2px 0;
}

/* FPS color coding */
.fps-green  { color: var(--green)  !important; }
.fps-yellow { color: var(--yellow) !important; }
.fps-red    { color: var(--red)    !important; }

/* ── Idle overlay ─────────────────────────────────────────────────────────── */
.idle-overlay {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 14, 10, 0.9);
  transition: opacity 0.4s;
}

.idle-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.idle-text {
  font-size: clamp(0.9rem, 2.5vw, 1.4rem);
  font-weight: 700;
  letter-spacing: 0.4em;
  color: rgba(0, 255, 65, 0.35);
  animation: blink-text 2.5s step-end infinite;
}

@keyframes blink-text {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.2; }
}

/* ── Scan line animation ──────────────────────────────────────────────────── */
.scan-line-wrap {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 4;
  opacity: 0;
  transition: opacity 0.5s;
}

.scan-line-wrap.active { opacity: 1; }

.scan-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, rgba(0,255,65,0.35) 50%, transparent 100%);
  animation: scan 6s linear infinite;
  top: -2px;
}

@keyframes scan {
  0%   { top: -2px; }
  100% { top: 100%; }
}

/* ── Corner brackets ──────────────────────────────────────────────────────── */
.corner {
  position: absolute;
  width: 22px;
  height: 22px;
  border-color: var(--green);
  border-style: solid;
  z-index: 6;
  opacity: 0.7;
}

.corner-tl { top: 10px;    left: 10px;   border-width: 2px 0 0 2px; }
.corner-tr { top: 10px;    right: 10px;  border-width: 2px 2px 0 0; }
.corner-bl { bottom: 10px; left: 10px;   border-width: 0 0 2px 2px; }
.corner-br { bottom: 10px; right: 10px;  border-width: 0 2px 2px 0; }

/* ── Detection badge (bottom-left) ───────────────────────────────────────── */
.detection-badge {
  position: absolute;
  bottom: 14px;
  left: 14px;
  z-index: 7;
  background: var(--bg-panel);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--green-dim);
  padding: 6px 10px;
}

.badge-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge-label {
  font-size: clamp(0.55rem, 1.2vw, 0.65rem);
  font-weight: 600;
  letter-spacing: 0.15em;
  color: rgba(0, 255, 65, 0.6);
  min-width: 5.5ch;
}

.badge-value {
  font-size: clamp(0.65rem, 1.4vw, 0.8rem);
  font-weight: 700;
  color: var(--green);
  min-width: 3ch;
  text-align: right;
}

/* ── Control sidebar (desktop) ────────────────────────────────────────────── */
.control-sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  overflow-y: auto;
  background: var(--bg-panel);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-left: 1px solid var(--green-dim);
  display: flex;
  flex-direction: column;
}

.sidebar-inner {
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* ── Panel sections (shared by sidebar + bottom sheet) ───────────────────── */
.panel-section {
  padding: 16px;
  border-bottom: 1px solid var(--green-faint);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.section-header {
  font-size: clamp(0.55rem, 1.1vw, 0.65rem);
  font-weight: 700;
  letter-spacing: 0.3em;
  color: rgba(0, 255, 65, 0.5);
  text-transform: uppercase;
}

.shortcut-hint {
  font-size: clamp(0.5rem, 1vw, 0.6rem);
  color: rgba(0, 255, 65, 0.35);
  letter-spacing: 0.05em;
  line-height: 1.6;
}

kbd {
  display: inline-block;
  padding: 1px 4px;
  border: 1px solid rgba(0, 255, 65, 0.3);
  font-family: var(--font);
  font-size: inherit;
  color: rgba(0, 255, 65, 0.6);
}

/* ── Crosshair selector (desktop grid) ───────────────────────────────────── */
.crosshair-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}

.crosshair-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 4px 6px;
  background: transparent;
  border: 1px solid rgba(0, 255, 65, 0.2);
  color: rgba(0, 255, 65, 0.6);
  font-family: var(--font);
  font-size: clamp(0.45rem, 0.9vw, 0.55rem);
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
  min-height: 44px;
}

.crosshair-btn svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.crosshair-label {
  text-transform: uppercase;
  line-height: 1;
}

.crosshair-btn:hover {
  border-color: rgba(0, 255, 65, 0.5);
  background: var(--green-faint);
  color: var(--green);
}

.crosshair-btn.active {
  border-color: var(--green);
  background: rgba(0, 255, 65, 0.1);
  color: var(--green);
  box-shadow: 0 0 8px rgba(0, 255, 65, 0.2);
}

.crosshair-btn:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 2px;
}

/* Mobile: horizontal scroll row */
.crosshair-scroll {
  display: flex;
  flex-direction: row;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: thin;
  scrollbar-color: var(--green-dim) transparent;
}

.crosshair-scroll .crosshair-btn {
  flex-shrink: 0;
  width: 60px;
}

/* ── Grid toggle button ───────────────────────────────────────────────────── */
.grid-toggle-btn {
  width: 100%;
  justify-content: flex-start;
  gap: 8px;
  text-align: left;
  padding: 0 14px;
}

.grid-toggle-btn.active {
  color: var(--green);
  border-color: var(--green);
  background: rgba(0, 255, 65, 0.08);
}

.toggle-state {
  margin-left: auto;
  font-weight: 700;
}

/* ── Control panel (bottom bar) ───────────────────────────────────────────── */
.control-panel {
  flex: 0 0 var(--controls-h);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0 16px;
  background: var(--bg-panel);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-top: 1px solid var(--green-dim);
}

/* Hide the mobile control bar on desktop (sidebar has toggle btn) */
@media (min-width: 769px) {
  .control-panel { display: none; }
  .settings-btn  { display: none; }
}

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.btn {
  min-width: 44px;
  min-height: 44px;
  padding: 0 20px;
  font-family: var(--font);
  font-size: clamp(0.7rem, 1.5vw, 0.85rem);
  font-weight: 700;
  letter-spacing: 0.2em;
  cursor: pointer;
  border: 1px solid;
  background: transparent;
  transition: background 0.15s, box-shadow 0.15s, color 0.15s;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 2px;
}

.btn-primary {
  color: var(--green);
  border-color: var(--green);
  width: 100%;
}

.btn-primary:hover,
.btn-primary:active {
  background: rgba(0, 255, 65, 0.12);
  box-shadow: 0 0 12px rgba(0, 255, 65, 0.3);
}

.btn-primary[data-state="active"] {
  color: var(--red);
  border-color: var(--red);
}

.btn-primary[data-state="active"]:hover,
.btn-primary[data-state="active"]:active {
  background: rgba(255, 48, 48, 0.12);
  box-shadow: 0 0 12px rgba(255, 48, 48, 0.3);
}

.btn-primary[data-state="requesting"] {
  color: var(--yellow);
  border-color: var(--yellow);
  pointer-events: none;
  opacity: 0.7;
}

.btn-secondary {
  color: rgba(0, 255, 65, 0.7);
  border-color: rgba(0, 255, 65, 0.4);
  font-size: clamp(0.65rem, 1.4vw, 0.8rem);
  padding: 0 14px;
}

.btn-secondary:hover,
.btn-secondary:active {
  background: rgba(0, 255, 65, 0.08);
}

.settings-btn {
  font-size: 1rem;
  padding: 0 12px;
}

/* ── Error banner ─────────────────────────────────────────────────────────── */
.error-panel {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: rgba(255, 48, 48, 0.1);
  border-top: 1px solid rgba(255, 48, 48, 0.4);
  color: var(--red);
  font-size: clamp(0.65rem, 1.4vw, 0.8rem);
  letter-spacing: 0.05em;
}

.error-prefix {
  font-weight: 700;
  flex-shrink: 0;
}

/* ── Mobile bottom sheet ──────────────────────────────────────────────────── */
.bottom-sheet {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 300;
  background: var(--bg-mid);
  border-top: 1px solid var(--green-dim);
  border-radius: 12px 12px 0 0;
  max-height: 60vh;
  transform: translateY(100%);
  transition: transform 0.35s cubic-bezier(0.32, 0.72, 0, 1);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  scrollbar-width: thin;
  scrollbar-color: var(--green-dim) transparent;
}

.bottom-sheet.open { transform: translateY(0); }

.bottom-sheet-handle {
  flex-shrink: 0;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: grab;
  touch-action: none;
}

.bottom-sheet-handle::before {
  content: '';
  width: 40px;
  height: 4px;
  border-radius: 2px;
  background: rgba(0, 255, 65, 0.3);
}

.bottom-sheet-handle:active { cursor: grabbing; }

.bottom-sheet-handle:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 2px;
}

.bottom-sheet-content {
  padding-bottom: env(safe-area-inset-bottom, 16px);
}

/* Only render bottom sheet on mobile */
@media (min-width: 769px) {
  .bottom-sheet { display: none !important; }
}

/* ── Permission modal ─────────────────────────────────────────────────────── */
.modal {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 14, 10, 0.92);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  padding: 24px;
  transition: opacity 0.3s;
}

.modal.modal-hidden {
  opacity: 0;
  pointer-events: none;
}

.modal-content {
  max-width: 420px;
  width: 100%;
  background: var(--bg-mid);
  border: 1px solid var(--green-dim);
  padding: 36px 32px;
  text-align: center;
  box-shadow: 0 0 40px rgba(0, 255, 65, 0.1);
}

.modal-icon {
  font-size: 2.5rem;
  color: var(--green);
  margin-bottom: 20px;
  opacity: 0.8;
}

.modal-content h2 {
  font-size: clamp(0.9rem, 2.5vw, 1.1rem);
  font-weight: 700;
  letter-spacing: 0.25em;
  margin-bottom: 16px;
  color: var(--green);
}

.modal-content p {
  font-size: clamp(0.7rem, 1.6vw, 0.85rem);
  line-height: 1.7;
  color: rgba(0, 255, 65, 0.75);
  margin-bottom: 12px;
}

.modal-sub {
  font-size: clamp(0.6rem, 1.3vw, 0.72rem) !important;
  opacity: 0.55;
}

.modal-content .btn { margin-top: 24px; height: 48px; }

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 480px) {
  .hud-center { display: none; }
  .corner { width: 16px; height: 16px; }
  .modal-content { padding: 28px 20px; }
}

/* ── Accessibility: reduced motion ────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .scan-line,
  .idle-text,
  .status-dot,
  .lock-badge {
    animation: none;
  }

  .bottom-sheet {
    transition: none;
  }

  /* Pulse on bounding box is suppressed in JS via matchMedia */
}

/* ── Intelligence HUD panel (top-right in camera) ─────────────────────────── */
.intel-panel {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 7;
  background: var(--bg-panel);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--green-dim);
  padding: 6px 10px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 150px;
}

/* ── Lock badge (bottom-centre in camera) ─────────────────────────────────── */
.lock-badge {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 7;
  background: rgba(0, 255, 65, 0.12);
  border: 1px solid var(--green);
  padding: 4px 18px;
  font-size: clamp(0.5rem, 1.1vw, 0.6rem);
  font-weight: 700;
  letter-spacing: 0.35em;
  color: var(--green);
  white-space: nowrap;
  animation: lock-pulse 1.5s ease-in-out infinite;
}

@keyframes lock-pulse {
  0%, 100% { box-shadow: 0 0 8px  rgba(0, 255, 65, 0.25); }
  50%       { box-shadow: 0 0 18px rgba(0, 255, 65, 0.55); }
}

/* ── Distance bar (inside HUD info panel) ─────────────────────────────────── */
.dist-bar-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 1px 0 2px;
}

.dist-bar {
  flex: 1;
  height: 3px;
  background: rgba(0, 255, 65, 0.15);
  border-radius: 2px;
  overflow: hidden;
  min-width: 40px;
}

.dist-bar-fill {
  height: 100%;
  width: 0%;
  border-radius: 2px;
  background: var(--green);
  transition: width 0.3s ease, background 0.3s ease;
}

.dist-label {
  font-size: clamp(0.42rem, 0.9vw, 0.52rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  min-width: 8ch;
  text-align: right;
  color: var(--green);
  transition: color 0.3s;
}

/* ── HUD unit toggle button (inline with distance row) ────────────────────── */
.hud-unit-btn {
  font-family: var(--font);
  font-size: clamp(0.42rem, 0.9vw, 0.52rem);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: rgba(0, 255, 65, 0.45);
  background: transparent;
  border: 1px solid rgba(0, 255, 65, 0.2);
  padding: 1px 5px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
  flex-shrink: 0;
}

.hud-unit-btn:hover {
  color: var(--green);
  border-color: rgba(0, 255, 65, 0.6);
}

/* ── Slider rows (in sidebar sections) ───────────────────────────────────── */
.slider-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.slider-label {
  font-size: clamp(0.5rem, 1.1vw, 0.6rem);
  font-weight: 600;
  letter-spacing: 0.12em;
  color: rgba(0, 255, 65, 0.55);
  min-width: 5ch;
  flex-shrink: 0;
}

.slider-val {
  font-size: clamp(0.5rem, 1.1vw, 0.6rem);
  font-weight: 700;
  color: var(--green);
  min-width: 3.5ch;
  text-align: right;
  flex-shrink: 0;
}

/* Range input — cross-browser tactical styling */
.hud-slider {
  flex: 1;
  min-width: 0;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: rgba(0, 255, 65, 0.2);
  outline: none;
  border-radius: 2px;
  cursor: pointer;
}

.hud-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--green);
  cursor: pointer;
  box-shadow: 0 0 6px rgba(0, 255, 65, 0.5);
}

.hud-slider::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border: none;
  border-radius: 50%;
  background: var(--green);
  cursor: pointer;
  box-shadow: 0 0 6px rgba(0, 255, 65, 0.5);
}

.hud-slider:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* ── Control row (side-by-side buttons) ──────────────────────────────────── */
.control-row {
  display: flex;
  gap: 8px;
}

/* ── Generic toggle button active state ──────────────────────────────────── */
.btn-secondary.active {
  color: var(--green);
  border-color: var(--green);
  background: rgba(0, 255, 65, 0.08);
}

/* ── Intelligence metrics (sidebar section) ───────────────────────────────── */
.intel-metrics {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.metric-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.metric-label {
  font-size: clamp(0.5rem, 1.1vw, 0.6rem);
  font-weight: 600;
  letter-spacing: 0.1em;
  color: rgba(0, 255, 65, 0.55);
  flex-shrink: 0;
}

.metric-val {
  font-size: clamp(0.55rem, 1.2vw, 0.65rem);
  font-weight: 700;
  color: var(--green);
  text-align: right;
}