:root {
  color-scheme: light;
  --accent: #0f766e;
  --ink: #16211f;
  --muted: #65716f;
  --line: #cfd8d5;
  --surface: #f4f8f7;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: #ffffff;
  color: var(--ink);
  font: 16px/1.4 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.app {
  width: min(720px, 100%);
  margin: 0 auto;
  padding: max(18px, env(safe-area-inset-top)) 18px max(24px, env(safe-area-inset-bottom));
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

h1 {
  margin: 0 0 4px;
  font-size: clamp(30px, 8vw, 46px);
  letter-spacing: 0;
}

h2 {
  margin: 0 0 10px;
  font-size: 18px;
}

p {
  margin: 0;
  color: var(--muted);
}

.picker {
  position: relative;
  min-height: 150px;
  border: 2px dashed var(--line);
  border-radius: 8px;
  background: var(--surface);
  transition: border-color 120ms ease, background 120ms ease;
}

.picker.dragging {
  border-color: var(--accent);
  background: #e6f4f1;
}

.picker input {
  position: absolute;
  inset: 0;
  opacity: 0;
}

.picker label {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 8px;
  text-align: center;
  padding: 22px;
}

.picker .icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  font-size: 30px;
  line-height: 1;
}

.picker span:last-child,
.status {
  color: var(--muted);
}

.status {
  min-height: 26px;
  margin: 14px 0;
}

.result {
  display: grid;
  gap: 18px;
}

.hidden {
  display: none;
}

.qr-card {
  display: grid;
  place-items: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

canvas {
  width: min(100%, 360px);
  height: auto;
  image-rendering: pixelated;
}

.actions {
  display: flex;
  gap: 10px;
}

button,
.actions a {
  flex: 1;
  appearance: none;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  padding: 13px 14px;
  font: inherit;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
}

dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  column-gap: 14px;
  row-gap: 6px;
  margin: 0;
}

dt {
  color: var(--muted);
}

dd {
  margin: 0;
  font-weight: 700;
}

textarea {
  width: 100%;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  font: 13px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--ink);
}