:root {
  --bg-top: #0e1416;
  --bg-bottom: #1c2428;
  --card: rgba(17, 24, 28, 0.95);
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(131, 230, 192, 0.34);
  --text-main: #f0f6f2;
  --text-soft: #b7c9bf;
  --text-muted: #8ca196;
  --accent: #83e6c0;
  --accent-strong: #efff96;
  --shadow: 0 28px 56px rgba(3, 8, 9, 0.34);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  background:
    radial-gradient(circle at top left, rgba(131, 230, 192, 0.14), transparent 22%),
    linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
  color: var(--text-main);
  font-family: "Bahnschrift", "Aptos", "Segoe UI", sans-serif;
}

button,
input {
  font: inherit;
}

[hidden] {
  display: none !important;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 16px;
}

.app-card {
  width: min(100%, 560px);
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent 22%),
    var(--card);
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
  color: var(--accent-strong);
}

h1 {
  margin: 8px 0 0;
  font-size: clamp(1.8rem, 5vw, 2.5rem);
  letter-spacing: -0.03em;
}

.scan-button,
.scan-now-button,
.install-button,
.copy-button {
  min-height: 52px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-main);
}

.control-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  margin-top: 18px;
}

.scan-button {
  background: linear-gradient(180deg, rgba(131, 230, 192, 0.22), rgba(131, 230, 192, 0.12));
  border-color: var(--line-strong);
  font-weight: 800;
}

.scan-now-button,
.copy-button {
  min-width: 116px;
  padding: 0 18px;
  background: rgba(255, 255, 255, 0.05);
}

.install-button {
  width: 100%;
  margin-top: 10px;
  background: rgba(255, 255, 255, 0.05);
}

.scan-now-button:disabled,
.copy-button:disabled {
  opacity: 0.55;
}

.status-line,
.install-note,
.preview-empty p,
.result-label {
  color: var(--text-soft);
}

.install-note {
  min-height: 1.25em;
  margin: 10px 0 0;
  font-size: 0.9rem;
  line-height: 1.4;
}

.status-line {
  min-height: 1.4em;
  margin: 14px 0 0;
  line-height: 1.45;
}

.preview-frame {
  position: relative;
  width: min(100%, 380px);
  height: 176px;
  margin: 18px auto 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(131, 230, 192, 0.05), transparent 32%),
    linear-gradient(180deg, rgba(8, 13, 15, 0.96), rgba(14, 20, 23, 0.96));
}

.preview-frame video,
.preview-frame canvas {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.guide-box {
  position: absolute;
  inset: 10px;
  border: 2px solid rgba(131, 230, 192, 0.9);
  border-radius: 22px;
  box-shadow:
    inset 0 0 0 1px rgba(239, 255, 150, 0.28);
  pointer-events: none;
}

.guide-box::before,
.guide-box::after {
  content: "";
  position: absolute;
  width: 28px;
  height: 28px;
  border-color: var(--accent-strong);
  border-style: solid;
}

.guide-box::before {
  left: 8px;
  top: 8px;
  border-width: 3px 0 0 3px;
  border-top-left-radius: 12px;
}

.guide-box::after {
  right: 8px;
  bottom: 8px;
  border-width: 0 3px 3px 0;
  border-bottom-right-radius: 12px;
}

.guide-label {
  position: absolute;
  left: 50%;
  top: -14px;
  transform: translateX(-50%);
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(8, 13, 15, 0.92);
  border: 1px solid rgba(131, 230, 192, 0.28);
  color: var(--accent-strong);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.preview-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  padding: 24px;
  text-align: center;
}

.preview-empty strong {
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.result-card {
  margin-top: 18px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.03);
}

.result-label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.86rem;
}

.code-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
}

#final-code {
  width: 100%;
  min-height: 52px;
  padding: 0 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  font-size: 1.05rem;
  letter-spacing: 0.03em;
}

@media (max-width: 640px) {
  .app-card {
    padding: 18px;
  }

  .preview-frame {
    width: min(100%, 340px);
    height: 156px;
  }

  .control-row,
  .code-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .guide-box {
    inset: 8px;
  }

  .guide-label {
    font-size: 0.68rem;
  }
}