:root {
  --green: #268b45;
  --dark: #183d2b;
  --background: #f4f7f4;
  --border: #dce5dd;
  --text: #203027;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: system-ui, sans-serif;
  line-height: 1.55;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px max(20px, calc((100% - 1150px) / 2));
  background: var(--dark);
  color: white;
}

.brand {
  color: white;
  font-size: 1.2rem;
  font-weight: 800;
  text-decoration: none;
}

.topbar span { color: #d4e9d8; font-size: .9rem; }

.container { max-width: 1150px; margin: auto; padding: 32px 20px; }
.intro { margin-bottom: 28px; }
.intro h1 { margin: 4px 0; font-size: clamp(2rem, 5vw, 3.2rem); }
.intro p { color: #58665c; }
.eyebrow { color: var(--green) !important; font-weight: 800; letter-spacing: .12em; }

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, .8fr);
  align-items: start;
  gap: 22px;
}

#qr-form { display: grid; gap: 18px; }

.panel {
  background: white;
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px;
  box-shadow: 0 5px 20px #183d2b08;
}

.panel h2 { margin: 0 0 18px; font-size: 1.2rem; }

label { display: block; margin: 14px 0 6px; font-weight: 650; }

input:not([type="checkbox"]):not([type="color"]):not([type="file"]),
select, textarea {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid #cbd7cd;
  border-radius: 9px;
  background: white;
  color: var(--text);
  font: inherit;
}

input[type="color"] { width: 100%; height: 44px; cursor: pointer; }
input[type="file"] { display: block; width: 100%; padding: 8px 0; }
textarea { resize: vertical; }

input:focus, select:focus, textarea:focus {
  outline: 3px solid #268b4533;
  border-color: var(--green);
}

.fields, .options { margin-top: 12px; }
.fields[hidden], .options[hidden], [hidden] { display: none !important; }

.two-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 16px;
}

.check {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 18px 0;
  cursor: pointer;
}

.check input {
  width: 19px;
  height: 19px;
  accent-color: var(--green);
  flex-shrink: 0;
}

small, .hint { color: #657168; font-size: .85rem; }

.primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 48px;
  padding: 12px 18px;
  border: 0;
  border-radius: 10px;
  background: var(--green);
  color: white;
  font: inherit;
  font-weight: 750;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}

.primary:hover { background: var(--dark); }
.primary:disabled { opacity: .6; cursor: wait; }

.preview-panel { position: sticky; top: 20px; }

.preview {
  display: grid;
  place-items: center;
  min-height: 320px;
  padding: 16px;
  border: 1px dashed #cbd7cd;
  border-radius: 12px;
  background: #f9fbf9;
  overflow: hidden;
}

.preview img { display: block; max-width: 100%; height: auto; }
.placeholder { color: #7b887e; text-align: center; }
.placeholder span { font-size: 5rem; }

.download { margin-top: 16px; }
.hint { margin-top: 18px; }
#status { overflow-wrap: anywhere; }
#status.error { color: #b42318; }
#status.success { color: #20743a; }

footer { padding: 24px 16px; color: #657168; text-align: center; font-size: .85rem; }

@media (max-width: 760px) {
  .layout { grid-template-columns: 1fr; }
  .preview-panel { position: static; }
  .topbar { flex-wrap: wrap; }
}