:root {
  --bg: #f1f5f9;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --primary: #0f172a;
  --primary-hover: #1e293b;
  --accent: #2563eb;
  --success: #059669;
  --warn: #b45309;
  --danger: #b91c1c;
  --radius: 18px;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
}

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

.site-header {
  padding: 1rem 1.25rem 1rem;
}

.nav {
  max-width: 1024px;
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  color: var(--text);
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.nav-cta {
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.55rem 1rem;
  text-decoration: none;
  font-weight: 700;
}

.hero {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--success);
}

.hero h1 {
  margin: 0 0 0.65rem;
  font-size: clamp(1.85rem, 4.8vw, 2.8rem);
  line-height: 1.08;
  letter-spacing: -0.045em;
}

.hero-lead {
  margin: 0 auto;
  max-width: 34rem;
  color: var(--muted);
  font-size: 1rem;
}

.workspace {
  max-width: 960px;
  margin: 0 auto 1.5rem;
  padding: 0 1.25rem;
}

.workspace-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 1rem;
  align-items: start;
}

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

.preview-panel {
  position: sticky;
  top: 1rem;
  order: 2;
  display: grid;
  gap: 0.8rem;
  align-content: start;
  padding: 1rem;
  scroll-margin-top: 1rem;
}

.preview-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.preview-header h2,
.content-block h3 {
  margin: 0;
}

.preview-subhead,
.content-help {
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}


.badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.28rem 0.6rem;
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.badge-idle {
  background: #e2e8f0;
  color: var(--muted);
}

.badge-ready {
  background: #d1fae5;
  color: var(--success);
}

.badge-warn {
  background: #fef3c7;
  color: var(--warn);
}

.qr-preview {
  aspect-ratio: 1 / 1;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #f8fafc;
  padding: 0.9rem;
  overflow: hidden;
}

.preview-empty {
  text-align: center;
  color: var(--muted);
}

.preview-empty-icon {
  font-size: 2.5rem;
  opacity: 0.35;
  margin-bottom: 0.5rem;
}

.qr-canvas {
  display: block;
  width: min(100%, 250px);
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 8px 22px rgba(15, 23, 42, 0.08);
}

.status {
  min-height: 1.25rem;
  margin: 0.85rem 0 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.status-ok {
  color: var(--success);
}

.status-warn {
  color: var(--warn);
}

.download-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem;
  margin-top: 0.25rem;
}

#share-png {
  display: none;
}

@media (max-width: 900px) {
  #share-png.share-available {
    display: block;
    grid-column: 1 / -1;
  }
}

.btn {
  border: 0;
  border-radius: 12px;
  padding: 0.75rem 0.9rem;
  font-size: 0.9rem;
  font-weight: 800;
  cursor: pointer;
  transition: transform 140ms ease, background 140ms ease, box-shadow 140ms ease;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-primary {
  grid-column: 1 / -1;
  background: var(--primary);
  color: #ffffff;
}

.btn-primary:hover:not(:disabled),
.btn-secondary:hover:not(:disabled),
.btn-ghost:hover:not(:disabled),
.quick-type:hover,
.nav-cta:hover {
  transform: translateY(-1px);
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-hover);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-ghost {
  grid-column: 1 / -1;
  background: transparent;
  color: var(--muted);
  border: 1px dashed var(--border);
}

.editor-panel {
  order: 1;
  padding: 1.1rem;
}

#qr-form {
  display: grid;
  gap: 0.9rem;
  justify-items: stretch;
}

.field-block {
  width: 100%;
  margin-bottom: 0;
}

.content-block {
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface-soft);
}

label,
.customize-grid label {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  margin: 0.85rem 0 0.35rem;
}

.field-block > label:first-child,
.customize-grid > label:first-child {
  margin-top: 0;
}

input,
select,
textarea {
  width: 100%;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.72rem 0.8rem;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.14);
}

textarea {
  resize: vertical;
  min-height: 90px;
}

.quick-types {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.7rem;
}

.quick-type {
  border: 1px solid var(--border);
  background: var(--surface-soft);
  color: var(--text);
  border-radius: 999px;
  padding: 0.38rem 0.72rem;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
}

.quick-type.is-active {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
}

.content-heading-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.dynamic-fields > :first-child {
  margin-top: 0;
}

.field-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.check {
  display: flex !important;
  align-items: center;
  gap: 0.55rem;
  margin-top: 0.9rem !important;
  font-weight: 600 !important;
}

.check input,
.radio-row input {
  width: auto;
}

.radio-row {
  display: flex;
  gap: 1rem;
  border: 0;
  padding: 0;
  margin: 0.6rem 0 0;
}

.radio-row label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin: 0 !important;
  font-weight: 600 !important;
}

.input-compact {
  margin-bottom: 0.25rem;
}

.customize-panel {
  width: 100%;
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 0.85rem 1rem;
}

.customize-panel summary {
  cursor: pointer;
  font-weight: 800;
}

.customize-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 0.8rem;
  margin-top: 0.75rem;
}

.customize-grid .check {
  grid-column: 1 / -1;
}

.generate-row {
  display: none;
}

.btn-generate {
  width: 100%;
  background: var(--accent);
  color: #ffffff;
  font-size: 1rem;
  padding: 0.9rem 1rem;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.22);
}

.btn-generate:hover:not(:disabled) {
  background: #1d4ed8;
  transform: translateY(-1px);
}

.generate-hint {
  margin: 0.55rem 0 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.82rem;
}

.utility-note {
  max-width: 960px;
  margin: 0 auto 1.5rem;
  padding: 0 1.25rem;
  color: var(--muted);
  font-size: 0.92rem;
  text-align: center;
}

.site-footer {
  text-align: center;
  padding: 1.25rem 1.25rem 2rem;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 900px) {
  .workspace-grid {
    grid-template-columns: 1fr;
  }

  .preview-panel {
    position: static;
    order: 2;
    gap: 0.85rem;
  }

  .editor-panel {
    order: 1;
  }

  .generate-row {
    display: block;
  }
}

@media (max-width: 640px) {
  .nav,
  .content-heading-row {
    flex-direction: column;
    align-items: stretch;
  }

  .nav-cta {
    text-align: center;
  }

  .field-row,
  .customize-grid,
  .download-row {
    grid-template-columns: 1fr;
  }
}