* {
  box-sizing: border-box;
}

:root {
  color-scheme: dark;
  --bg: #090b10;
  --panel: rgba(20, 24, 34, 0.94);
  --panel-2: rgba(29, 35, 48, 0.95);
  --text: #f3f6fb;
  --muted: #9ca8bb;
  --accent: #64d8ff;
  --accent-2: #9b7bff;
  --border: rgba(255, 255, 255, 0.09);
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  overscroll-behavior: none;
}

body {
  min-height: 100dvh;
}

button,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.ar-container {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  background: #000;
}

.ar-container video,
.ar-container canvas {
  position: absolute;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
  object-fit: cover;
}

.app-shell {
  position: relative;
  z-index: 1;
  width: min(100%, 760px);
  min-height: 100dvh;
  margin: 0 auto;
  padding: max(18px, env(safe-area-inset-top)) 16px max(24px, env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  pointer-events: none;
}

.topbar,
.controls-card,
.instructions,
.scan-hint {
  pointer-events: auto;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--accent);
  font-size: 0.77rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: clamp(1.6rem, 7vw, 2.4rem);
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.7);
}

.controls-card,
.instructions,
.scan-hint {
  border: 1px solid var(--border);
  background: var(--panel);
  box-shadow: 0 20px 55px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(14px);
}

.scan-hint {
  margin-top: auto;
  margin-bottom: 14px;
  border-radius: 20px;
  padding: 18px;
  display: grid;
  place-items: center;
  gap: 10px;
  text-align: center;
  color: var(--muted);
}

.loader {
  width: 36px;
  height: 36px;
  border: 4px solid rgba(255, 255, 255, 0.15);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.controls-card,
.instructions {
  margin-top: 14px;
  border-radius: 20px;
  padding: 16px;
}

.control-row {
  display: grid;
  gap: 8px;
}

.control-row + .control-row,
.button-row + .control-row {
  margin-top: 14px;
}

.control-row label {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 700;
}

select,
.button-row button,
.icon-btn {
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--panel-2);
}

select {
  width: 100%;
  min-height: 46px;
  border-radius: 14px;
  padding: 0 13px;
}

.button-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 9px;
  margin-top: 14px;
}

.button-row button {
  min-height: 44px;
  border-radius: 13px;
  font-weight: 800;
}

.button-row button:active,
.icon-btn:active {
  transform: translateY(1px);
}

.icon-btn {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  font-weight: 900;
  background: var(--panel);
}

.status {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.45;
}

.instructions p {
  color: var(--muted);
  line-height: 1.6;
}

.hidden {
  display: none;
}

footer {
  padding: 18px 6px 2px;
  color: #667085;
  text-align: center;
  font-size: 0.78rem;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.6);
}