:root {
  color-scheme: light;
  --page: #eef2f5;
  --panel: #ffffff;
  --ink: #17202a;
  --muted: #5d6b78;
  --line: #d4dce3;
  --blue: #1769aa;
  --blue-dark: #0f4e81;
  --green: #17815e;
  --orange: #b7611b;
  --shadow: 0 22px 60px rgba(20, 32, 45, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0)),
    var(--page);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

button,
input,
select,
textarea {
  font: inherit;
}

.app-shell {
  min-height: 100vh;
  padding: 32px;
  display: grid;
  place-items: center;
}

.workspace {
  width: min(1120px, 100%);
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(320px, 0.88fr);
  gap: 22px;
  align-items: stretch;
}

.editor-panel,
.preview-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.editor-panel {
  padding: 28px;
}

.preview-panel {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.title-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--orange);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.6rem);
  line-height: 0.98;
  letter-spacing: 0;
}

.status-pill {
  flex: 0 0 auto;
  min-width: 72px;
  padding: 8px 12px;
  border-radius: 999px;
  background: #e8f5ef;
  color: var(--green);
  font-size: 0.83rem;
  font-weight: 800;
  text-align: center;
}

.status-pill.error {
  background: #fdeceb;
  color: #b3261e;
}

.status-pill.busy {
  background: #eaf2fb;
  color: var(--blue-dark);
}

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

.type-picker {
  margin: 0;
  padding: 0;
  border: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
}

.type-picker legend {
  width: 100%;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 800;
}

.type-picker label {
  min-width: 0;
  cursor: pointer;
}

.type-picker input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.type-picker span {
  display: grid;
  min-height: 44px;
  place-items: center;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 800;
  text-align: center;
  transition:
    background 150ms ease,
    border-color 150ms ease,
    color 150ms ease;
}

.type-picker input:checked + span {
  border-color: var(--blue);
  background: #eef7ff;
  color: var(--blue-dark);
}

.type-picker input:focus-visible + span {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(23, 105, 170, 0.16);
}

.field-group,
.payload-box,
.select-label {
  display: grid;
  gap: 8px;
}

label,
legend {
  color: var(--muted);
}

.field-group label,
.payload-box label,
.select-label {
  font-size: 0.92rem;
  font-weight: 800;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
  color: var(--ink);
  outline: 0;
}

input,
select {
  height: 44px;
  padding: 0 12px;
}

textarea {
  min-height: 96px;
  resize: vertical;
  padding: 12px;
  line-height: 1.45;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(23, 105, 170, 0.16);
}

.field-grid {
  display: grid;
  gap: 14px;
}

.options-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

button {
  min-height: 44px;
  border: 0;
  border-radius: 8px;
  padding: 0 16px;
  cursor: pointer;
  font-weight: 800;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.primary-button {
  background: var(--blue);
  color: #ffffff;
}

.primary-button:hover:not(:disabled) {
  background: var(--blue-dark);
}

.secondary-button {
  background: #e8edf2;
  color: #233241;
}

.secondary-button:hover:not(:disabled) {
  background: #d8e1e9;
}

.qr-stage {
  position: relative;
  min-height: 330px;
  display: grid;
  place-items: center;
  border: 1px dashed #b9c4ce;
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(23, 105, 170, 0.06) 1px, transparent 1px),
    linear-gradient(rgba(23, 105, 170, 0.06) 1px, transparent 1px), #fbfcfd;
  background-size: 24px 24px;
  overflow: hidden;
}

#qr-code {
  display: none;
  border: 12px solid #ffffff;
  border-radius: 8px;
  box-shadow: 0 10px 28px rgba(20, 32, 45, 0.14);
  overflow: hidden;
}

.has-qr #qr-code {
  display: block;
}

#qr-code canvas,
#qr-code img {
  display: block;
  max-width: 100%;
  height: auto;
}

#empty-state {
  margin: 0;
  padding: 0 18px;
  color: var(--muted);
  font-weight: 800;
  text-align: center;
}

.has-qr #empty-state {
  display: none;
}

.payload-box textarea {
  min-height: 104px;
  background: #f7f9fb;
}

.hidden {
  display: none;
}

@media (max-width: 860px) {
  .app-shell {
    padding: 18px;
    align-items: start;
  }

  .workspace {
    grid-template-columns: 1fr;
  }

  .type-picker {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .editor-panel,
  .preview-panel {
    padding: 18px;
  }

  .title-row,
  .options-row {
    grid-template-columns: 1fr;
  }

  .title-row {
    display: grid;
  }

  h1 {
    font-size: 2.25rem;
  }

  .type-picker {
    grid-template-columns: 1fr;
  }

  .button-row button {
    width: 100%;
  }
}