:root {
  --bg-color: #0b0f14;
  --accent-color: #71f562;
  --button-bg-color: rgb(85, 0, 255);
}

body {
  margin: 0;
  font-family: "Special Elite", system-ui;
  background: var(--bg-color);
  color: var(--accent-color);
  overflow: hidden;
}

.start-screen {
  height: 100vh;
  display: grid;
  place-items: center;
}

.scan-btn {
  padding: 16px 28px;
  font-family: "Special Elite";
  border: 1px solid var(--accent-color);
  background: var(--button-bg-color);
  color: var(--accent-color);
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: 0 0 20px rgba(98, 245, 213, 0.12);
}

.hud {
  position: fixed;
  top: 24px;
  right: 24px;
  width: 320px;
  padding: 12px;
  border: 1px solid rgba(98, 245, 213, 0.5);
  background: rgb(85, 0, 255);
  backdrop-filter: blur(6px);
  display: none;
  z-index: 20;
}

.hud-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  margin-bottom: 10px;
  color: var(--accent-color);
  text-transform: uppercase;
}

.video-wrap {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border: 1px solid rgba(143, 255, 233, 0.35);
  background: #000;
}

video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: contrast(1.15) saturate(0) brightness(0.95);
  transform: scaleX(-1);
}

.scan-line {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent-color);
  box-shadow: 0 0 12px var(--accent-color);
  animation: scan 2.4s linear infinite;
}

.face-box {
  position: absolute;
  top: 23%;
  left: 27%;
  width: 46%;
  height: 42%;
  border: 2px solid var(--accent-color);
  box-shadow: 0 0 12px rgba(98, 245, 213, 0.35);
  pointer-events: none;
}

.face-box::before,
.face-box::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border-color: var(--accent-color);
}

.face-box::before {
  top: -2px;
  left: -2px;
  border-top: 3px solid var(--accent-color);
  border-left: 3px solid var(--accent-color);
}

.face-box::after {
  bottom: -2px;
  right: -2px;
  border-bottom: 3px solid var(--accent-color);
  border-right: 3px solid var(--accent-color);
}

.hud-footer {
  margin-top: 10px;
  font-size: 0.72rem;
  line-height: 1.5;
  color: var(--accent-color);
}

.status {
  color: var(--accent-color);
}

@keyframes scan {
  0% {
    top: 0%;
  }
  100% {
    top: 100%;
  }
}