:root {
  --ink: #12222f;
  --muted: #4d6776;
  --accent: #14b8a6;
  --accent-2: #fb7185;
  --accent-3: #f59e0b;
  --paper: #ffffff;
  --bg-a: #ecfeff;
  --bg-b: #fff7ed;
  --ok: #127750;
  --warn: #9f1239;
  --radius-xl: 24px;
  --radius-lg: 16px;
  --shadow: 0 24px 60px rgba(18, 34, 47, 0.16);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  color: var(--ink);
  font-family: "Outfit", "Avenir Next", "Segoe UI", sans-serif;
  background:
    radial-gradient(900px 500px at 15% 0%, #dcfce7 0%, transparent 60%),
    radial-gradient(700px 500px at 100% 15%, #fecdd3 0%, transparent 58%),
    linear-gradient(150deg, var(--bg-a), var(--bg-b));
}

body {
  padding: max(14px, env(safe-area-inset-top)) 14px max(14px, env(safe-area-inset-bottom));
  display: grid;
  place-items: center;
}

.app {
  width: min(100%, 460px);
  background: color-mix(in oklab, var(--paper) 95%, #ffffff);
  border: 1px solid rgba(18, 34, 47, 0.07);
  border-radius: var(--radius-xl);
  padding: 18px;
  box-shadow: var(--shadow);
  animation: enter-up 440ms ease-out both;
}

.head {
  display: grid;
  gap: 4px;
  margin-bottom: 14px;
}

h1 {
  margin: 0;
  font-size: clamp(1.2rem, 4vw, 1.6rem);
  letter-spacing: 0.01em;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.35;
}

.status {
  margin: 12px 0 0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: rgba(20, 184, 166, 0.14);
  color: var(--ok);
}

.status.warn {
  background: rgba(190, 24, 93, 0.12);
  color: var(--warn);
}

.status::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 0 0 currentColor;
  animation: ping 1.5s infinite;
}

.viewer {
  margin-top: 14px;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #d8e4ec;
  aspect-ratio: 3 / 4;
}

video {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.freeze-frame {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: none;
  background: #d8e4ec;
}

.freeze-frame.visible {
  display: block;
}

.frame {
  position: absolute;
  inset: 14% 10%;
  z-index: 3;
  border-radius: 20px;
  background:
    linear-gradient(transparent calc(50% - 1px), rgba(20, 184, 166, 0.55) 50%, transparent calc(50% + 1px));
  animation: scan-line 2.4s ease-in-out infinite;
  pointer-events: none;
}

.frame::before,
.frame::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 20px;
  border: 2px solid rgba(255, 255, 255, 0.8);
  box-shadow: inset 0 0 0 1px rgba(20, 184, 166, 0.6);
}

.frame::after {
  border-color: transparent;
  background:
    linear-gradient(var(--accent), var(--accent)) top left / 22px 3px no-repeat,
    linear-gradient(var(--accent), var(--accent)) top left / 3px 22px no-repeat,
    linear-gradient(var(--accent), var(--accent)) top right / 22px 3px no-repeat,
    linear-gradient(var(--accent), var(--accent)) top right / 3px 22px no-repeat,
    linear-gradient(var(--accent), var(--accent)) bottom left / 22px 3px no-repeat,
    linear-gradient(var(--accent), var(--accent)) bottom left / 3px 22px no-repeat,
    linear-gradient(var(--accent), var(--accent)) bottom right / 22px 3px no-repeat,
    linear-gradient(var(--accent), var(--accent)) bottom right / 3px 22px no-repeat;
  animation: pulse-frame 2.2s infinite;
}

.controls {
  margin-top: 14px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.btn {
  border: 0;
  border-radius: 999px;
  padding: 11px 16px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform 140ms ease, filter 140ms ease, opacity 140ms ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: linear-gradient(120deg, var(--accent), #0ea5e9);
  color: #ffffff;
  box-shadow: 0 10px 20px rgba(20, 184, 166, 0.28);
}

.btn-secondary {
  background: rgba(18, 34, 47, 0.08);
  color: var(--ink);
}

.btn-accent {
  background: linear-gradient(120deg, var(--accent-2), var(--accent-3));
  color: #ffffff;
  box-shadow: 0 10px 20px rgba(251, 113, 133, 0.25);
}

.install-btn[hidden] {
  display: none !important;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  filter: saturate(0.7);
}

.result {
  margin-top: 14px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(18, 34, 47, 0.08);
  background: #f8fafc;
  padding: 12px;
  display: none;
  animation: enter-up 260ms ease-out both;
}

.result.visible {
  display: block;
}

.result.highlight {
  border-color: rgba(20, 184, 166, 0.55);
  background:
    linear-gradient(115deg, rgba(20, 184, 166, 0.12), rgba(14, 165, 233, 0.1)),
    #f8fafc;
  box-shadow: 0 8px 26px rgba(20, 184, 166, 0.2);
  animation: enter-up 260ms ease-out both, result-pulse 860ms ease-out 1;
}

.label {
  margin: 0 0 8px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.result.highlight .label {
  color: #0f766e;
}

.value {
  margin: 0;
  font-family: "Space Mono", ui-monospace, Menlo, monospace;
  font-size: 0.88rem;
  line-height: 1.4;
  word-break: break-word;
  color: var(--ink);
}

.result-note {
  margin: 8px 0 0;
  font-size: 0.78rem;
  color: var(--muted);
}

.actions {
  margin-top: 10px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.hint {
  margin: 12px 2px 0;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.35;
}

.version {
  margin: 10px 2px 0;
  font-family: "Space Mono", ui-monospace, Menlo, monospace;
  font-size: 0.72rem;
  color: var(--muted);
  text-align: right;
}

@keyframes enter-up {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes ping {
  0% {
    box-shadow: 0 0 0 0 currentColor;
  }
  90% {
    box-shadow: 0 0 0 8px transparent;
  }
  100% {
    box-shadow: 0 0 0 0 transparent;
  }
}

@keyframes pulse-frame {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.55;
  }
}

@keyframes scan-line {
  0% {
    background-position-y: 18%;
  }
  50% {
    background-position-y: 82%;
  }
  100% {
    background-position-y: 18%;
  }
}

@keyframes result-pulse {
  from {
    transform: scale(0.985);
  }
  to {
    transform: scale(1);
  }
}

@media (max-width: 360px) {
  .app {
    padding: 14px;
  }

  .btn {
    font-size: 0.9rem;
    padding: 10px 14px;
  }
}