:root {
  --fg: #f2f2f2;
  --bg: #000;
  --dim: rgba(255, 255, 255, 0.55);
  --glass: rgba(0, 0, 0, 0.45);
  --red: #e5322d;
  --font: "Helvetica Neue", "Arial Black", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

[hidden] { display: none !important; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  overflow: hidden;
  overscroll-behavior: none;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
}

#video { display: none; }

#view {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100dvh;
  display: block;
  background: #000;
}

button {
  font: inherit;
  color: inherit;
  border: 0;
  background: none;
  cursor: pointer;
}

/* Download progress of the lenses */
#progress {
  position: fixed;
  top: env(safe-area-inset-top);
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(255, 255, 255, 0.15);
  pointer-events: none;
  z-index: 30;
}

#progress::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--fg);
  transform-origin: left;
  transform: scaleX(var(--p, 0));
  transition: transform 0.2s linear;
}

/* Intro */
.screen {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 24px;
  text-align: center;
  background: #000;
  z-index: 10;
}

.screen h1 {
  margin: 0;
  font-size: clamp(36px, 11vw, 72px);
  font-weight: 900;
  letter-spacing: 0.04em;
  background: #fff;
  color: #000;
  padding: 0.05em 0.3em;
}

.screen p {
  margin: 0;
  color: var(--dim);
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.6;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.big {
  margin-top: 12px;
  padding: 16px 28px;
  background: var(--fg);
  color: #000;
  font-weight: 900;
  font-size: 18px;
  letter-spacing: 0.06em;
}

.big:active { transform: scale(0.97); }

.link {
  color: var(--dim);
  font-family: var(--mono);
  font-size: 13px;
  text-decoration: underline;
}

.error {
  max-width: 360px;
  color: var(--red) !important;
}

/* HUD */
#hud {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 5;
}

#hud button { pointer-events: auto; }

.top {
  position: absolute;
  top: calc(env(safe-area-inset-top) + 12px);
  left: 16px;
  right: 16px;
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-shadow: 0 0 4px #000;
}

#credit {
  position: absolute;
  top: calc(env(safe-area-inset-top) + 30px);
  left: 16px;
  right: 16px;
  margin: 0;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--dim);
  text-shadow: 0 0 4px #000;
}

#rec { color: var(--red); animation: blink 1s steps(2) infinite; }

@keyframes blink { 50% { opacity: 0; } }

.bottom {
  position: absolute;
  left: 0;
  right: 0;
  bottom: calc(env(safe-area-inset-bottom) + 16px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

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

.chip {
  padding: 7px 12px;
  background: var(--glass);
  border: 1px solid rgba(255, 255, 255, 0.35);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--dim);
}

.chip[aria-pressed="true"] {
  background: var(--fg);
  color: #000;
  border-color: var(--fg);
}

.controls {
  display: flex;
  align-items: center;
  gap: 36px;
}

.round {
  display: grid;
  place-items: center;
  border-radius: 50%;
}

.round.small {
  width: 48px;
  height: 48px;
  background: var(--glass);
  border: 1px solid rgba(255, 255, 255, 0.35);
  font-size: 22px;
}

.round.small:disabled { opacity: 0.3; }

.shutter {
  width: 72px;
  height: 72px;
  border: 4px solid var(--fg);
  background: rgba(255, 255, 255, 0.15);
}

.shutter:active { background: var(--fg); }

.record span {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--red);
  transition: border-radius 0.15s;
}

.record.on span { border-radius: 3px; }

.glasses-toggle {
  padding: 10px 22px;
  background: var(--fg);
  color: #000;
  font-weight: 900;
  font-size: 14px;
  letter-spacing: 0.12em;
}

.glasses-toggle.off {
  background: var(--glass);
  color: var(--fg);
  border: 1px solid var(--fg);
}

#toast {
  position: fixed;
  left: 50%;
  top: calc(env(safe-area-inset-top) + 48px);
  transform: translateX(-50%);
  max-width: calc(100vw - 32px);
  padding: 8px 14px;
  background: var(--fg);
  color: #000;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  z-index: 20;
}