/* =========================================================
   QRCards – Main Stylesheet
   Structure: Variables → Reset → Layout → Components
   ========================================================= */

/* ---------------------------------------------------------
   1. Design Tokens
   --------------------------------------------------------- */
:root {
  /* Colors */
  --clr-brand:       #4f46e5;   /* indigo-600 */
  --clr-brand-dark:  #4338ca;   /* indigo-700 */
  --clr-brand-light: #ede9fe;   /* indigo-100 */
  --clr-accent:      #f59e0b;   /* amber-400 */

  --clr-surface:     #ffffff;
  --clr-surface-2:   #f9fafb;   /* gray-50 */
  --clr-surface-3:   #f3f4f6;   /* gray-100 */
  --clr-border:      #e5e7eb;   /* gray-200 */
  --clr-border-2:    #d1d5db;   /* gray-300 */

  --clr-text:        #111827;   /* gray-900 */
  --clr-text-2:      #374151;   /* gray-700 */
  --clr-text-muted:  #6b7280;   /* gray-500 */
  --clr-text-light:  #9ca3af;   /* gray-400 */

  --clr-error:       #dc2626;
  --clr-error-bg:    #fef2f2;
  --clr-success:     #16a34a;

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --fz-xs:   0.75rem;
  --fz-sm:   0.875rem;
  --fz-base: 1rem;
  --fz-lg:   1.125rem;
  --fz-xl:   1.25rem;
  --fz-2xl:  1.5rem;
  --fz-3xl:  1.875rem;
  --fz-4xl:  2.25rem;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Radii */
  --radius-sm:  0.375rem;
  --radius-md:  0.5rem;
  --radius-lg:  0.75rem;
  --radius-xl:  1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:  0 1px 2px 0 rgb(0 0 0 / .05);
  --shadow-md:  0 4px 6px -1px rgb(0 0 0 / .08), 0 2px 4px -2px rgb(0 0 0 / .05);
  --shadow-lg:  0 10px 15px -3px rgb(0 0 0 / .08), 0 4px 6px -4px rgb(0 0 0 / .05);
  --shadow-xl:  0 20px 25px -5px rgb(0 0 0 / .08), 0 8px 10px -6px rgb(0 0 0 / .05);

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   200ms ease;
  --transition-slow:   300ms ease;

  /* Layout */
  --max-width:  1100px;
  --card-width: 680px;
}

/* ---------------------------------------------------------
   2. Reset & Base
   --------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--fz-base);
  line-height: 1.6;
  color: var(--clr-text);
  background-color: var(--clr-surface-2);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

img, svg, canvas { display: block; max-width: 100%; }

a { color: var(--clr-brand); text-decoration: none; }
a:hover { text-decoration: underline; }

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

button { cursor: pointer; }
ul, ol { list-style: none; }

details > summary { cursor: pointer; list-style: none; }
details > summary::-webkit-details-marker { display: none; }

/* ---------------------------------------------------------
   3. Accessibility
   --------------------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 9999;
  padding: var(--space-2) var(--space-4);
  background: var(--clr-brand);
  color: #fff;
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: top var(--transition-fast);
}
.skip-link:focus { top: var(--space-4); }

:focus-visible {
  outline: 2px solid var(--clr-brand);
  outline-offset: 2px;
}

/* ---------------------------------------------------------
   4. Layout
   --------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.main-content {
  flex: 1;
  padding-block: var(--space-8) var(--space-16);
}

.main-content .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
}

/* ---------------------------------------------------------
   5. Header
   --------------------------------------------------------- */
.site-header {
  background: var(--clr-surface);
  border-bottom: 1px solid var(--clr-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-3);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--clr-text);
  text-decoration: none;
}

.logo:hover { text-decoration: none; }

.logo-icon {
  width: 32px;
  height: 32px;
  color: var(--clr-brand);
  flex-shrink: 0;
}

.logo-text {
  font-size: var(--fz-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo-accent { color: var(--clr-brand); }

.header-tagline {
  font-size: var(--fz-sm);
  color: var(--clr-text-muted);
  font-weight: 500;
}

/* ---------------------------------------------------------
   6. Hero
   --------------------------------------------------------- */
.hero {
  background: linear-gradient(135deg, #eef2ff 0%, #f0fdf4 100%);
  padding-block: var(--space-10) var(--space-8);
  text-align: center;
  border-bottom: 1px solid var(--clr-border);
}

.hero-title {
  font-size: clamp(var(--fz-2xl), 4vw, var(--fz-4xl));
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--clr-text);
}

.hero-subtitle {
  display: block;
  font-size: clamp(var(--fz-lg), 2.5vw, var(--fz-2xl));
  color: var(--clr-brand);
  font-weight: 500;
  margin-top: var(--space-1);
}

.hero-desc {
  margin-top: var(--space-3);
  font-size: var(--fz-lg);
  color: var(--clr-text-muted);
  max-width: 520px;
  margin-inline: auto;
}

/* ---------------------------------------------------------
   7. App Card
   --------------------------------------------------------- */
.app-card {
  width: 100%;
  max-width: var(--card-width);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
}

/* ---------------------------------------------------------
   8. Tab Navigation
   --------------------------------------------------------- */
.tab-nav {
  display: flex;
  background: var(--clr-surface-3);
  border-bottom: 1px solid var(--clr-border);
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: var(--space-2);
  gap: var(--space-1);
}

.tab-nav::-webkit-scrollbar { display: none; }

.tab-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border: none;
  background: transparent;
  color: var(--clr-text-muted);
  font-size: var(--fz-sm);
  font-weight: 500;
  border-radius: var(--radius-lg);
  white-space: nowrap;
  transition: background var(--transition-fast), color var(--transition-fast);
  flex-shrink: 0;
}

.tab-btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.tab-btn:hover {
  background: var(--clr-surface);
  color: var(--clr-text-2);
}

.tab-btn.active {
  background: var(--clr-surface);
  color: var(--clr-brand);
  box-shadow: var(--shadow-sm);
}

/* ---------------------------------------------------------
   9. Input Panels
   --------------------------------------------------------- */
.panels-wrapper {
  padding: var(--space-6);
}

.input-panel {
  display: none;
  flex-direction: column;
  gap: var(--space-4);
}

.input-panel.active { display: flex; }

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.field-group { display: flex; flex-direction: column; gap: var(--space-1); }
.field-group--sm { max-width: 110px; }
.field-group--check {
  justify-content: flex-end;
  padding-bottom: var(--space-1);
}

.field-label {
  font-size: var(--fz-sm);
  font-weight: 500;
  color: var(--clr-text-2);
}

.field-optional {
  font-weight: 400;
  color: var(--clr-text-light);
  font-size: var(--fz-xs);
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-wrapper .field-input {
  flex: 1;
  padding-right: 2.75rem;
}

.field-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--clr-border-2);
  border-radius: var(--radius-md);
  background: var(--clr-surface);
  color: var(--clr-text);
  font-size: var(--fz-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  -webkit-appearance: none;
  appearance: none;
}

.field-input::placeholder { color: var(--clr-text-light); }

.field-input:hover { border-color: var(--clr-brand); }

.field-input:focus {
  outline: none;
  border-color: var(--clr-brand);
  box-shadow: 0 0 0 3px rgb(79 70 229 / .15);
}

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

.field-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%236b7280'%3E%3Cpath fill-rule='evenodd' d='M5.23 7.21a.75.75 0 011.06.02L10 11.168l3.71-3.938a.75.75 0 111.08 1.04l-4.25 4.5a.75.75 0 01-1.08 0l-4.25-4.5a.75.75 0 01.02-1.06z' clip-rule='evenodd'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  background-size: 18px;
  padding-right: 2.5rem;
}

/* Paste / Eye toggle buttons inside input-wrapper */
.paste-btn,
.toggle-pass-btn {
  position: absolute;
  right: var(--space-3);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  border: none;
  background: transparent;
  color: var(--clr-text-muted);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.paste-btn svg, .toggle-pass-btn svg { width: 18px; height: 18px; }

.paste-btn:hover, .toggle-pass-btn:hover {
  color: var(--clr-brand);
  background: var(--clr-brand-light);
}

/* Checkbox */
.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  font-size: var(--fz-sm);
  color: var(--clr-text-2);
  font-weight: 500;
  user-select: none;
}

.checkbox-input { position: absolute; opacity: 0; width: 0; height: 0; }

.checkbox-custom {
  width: 18px;
  height: 18px;
  border: 2px solid var(--clr-border-2);
  border-radius: var(--radius-sm);
  background: var(--clr-surface);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.checkbox-input:checked + .checkbox-custom {
  background: var(--clr-brand);
  border-color: var(--clr-brand);
}

.checkbox-input:checked + .checkbox-custom::after {
  content: '';
  display: block;
  width: 10px;
  height: 6px;
  border-left: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(-45deg) translateY(-1px);
}

.checkbox-input:focus-visible + .checkbox-custom {
  outline: 2px solid var(--clr-brand);
  outline-offset: 2px;
}

/* ---------------------------------------------------------
   10. Customise Section
   --------------------------------------------------------- */
.customise-section {
  border-top: 1px solid var(--clr-border);
  margin-inline: var(--space-6);
}

.customise-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding-block: var(--space-4);
  font-size: var(--fz-sm);
  font-weight: 600;
  color: var(--clr-text-2);
  transition: color var(--transition-fast);
}

.customise-toggle svg {
  width: 16px;
  height: 16px;
  color: var(--clr-brand);
}

.customise-toggle:hover { color: var(--clr-brand); }

.customise-body {
  padding-bottom: var(--space-4);
}

.customise-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

/* Color inputs */
.color-input-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border: 1.5px solid var(--clr-border-2);
  border-radius: var(--radius-md);
  background: var(--clr-surface);
  transition: border-color var(--transition-fast);
}

.color-input-wrap:hover { border-color: var(--clr-brand); }

.color-swatch {
  width: 32px;
  height: 32px;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0;
  cursor: pointer;
  background: none;
  flex-shrink: 0;
}

.color-swatch::-webkit-color-swatch-wrapper { padding: 0; }
.color-swatch::-webkit-color-swatch { border: none; border-radius: var(--radius-sm); }
.color-swatch::-moz-color-swatch { border: none; border-radius: var(--radius-sm); }

.color-hex {
  font-size: var(--fz-sm);
  font-family: 'Courier New', monospace;
  color: var(--clr-text-2);
  font-weight: 500;
}

/* ---------------------------------------------------------
   11. Generate Button
   --------------------------------------------------------- */
.generate-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: calc(100% - var(--space-12));
  margin: var(--space-4) var(--space-6) var(--space-6);
  padding: var(--space-4) var(--space-6);
  background: var(--clr-brand);
  color: #fff;
  font-size: var(--fz-base);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-lg);
  letter-spacing: 0.01em;
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: 0 4px 14px 0 rgb(79 70 229 / .35);
}

.generate-btn svg { width: 20px; height: 20px; }

.generate-btn:hover {
  background: var(--clr-brand-dark);
  box-shadow: 0 6px 20px 0 rgb(79 70 229 / .45);
  transform: translateY(-1px);
}

.generate-btn:active { transform: translateY(0); }

/* ---------------------------------------------------------
   12. QR Output
   --------------------------------------------------------- */
.qr-output {
  width: 100%;
  max-width: var(--card-width);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
  animation: slideUp var(--transition-slow) both;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.qr-canvas-wrap {
  position: relative;
  display: inline-flex;
  padding: var(--space-5);
  background: #fff;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
}

#qr-canvas { border-radius: var(--radius-sm); }

.qr-loader {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgb(255 255 255 / .8);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(2px);
}

.qr-loader[hidden] { display: none; }

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--clr-border);
  border-top-color: var(--clr-brand);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.qr-content-preview {
  font-size: var(--fz-sm);
  color: var(--clr-text-muted);
  text-align: center;
  max-width: 340px;
  word-break: break-all;
  background: var(--clr-surface-3);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-4);
}

/* ---------------------------------------------------------
   13. Action Buttons
   --------------------------------------------------------- */
.action-btns {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-lg);
  font-size: var(--fz-sm);
  font-weight: 600;
  border: none;
  transition: all var(--transition-fast);
}

.action-btn svg { width: 16px; height: 16px; }

.action-btn--primary {
  background: var(--clr-brand);
  color: #fff;
  box-shadow: 0 2px 8px 0 rgb(79 70 229 / .3);
}
.action-btn--primary:hover { background: var(--clr-brand-dark); transform: translateY(-1px); }

.action-btn--secondary {
  background: var(--clr-surface-3);
  color: var(--clr-text-2);
  border: 1px solid var(--clr-border-2);
}
.action-btn--secondary:hover { background: var(--clr-border); color: var(--clr-text); }

.action-btn--ghost {
  background: transparent;
  color: var(--clr-text-muted);
  border: 1px solid var(--clr-border);
}
.action-btn--ghost:hover { background: var(--clr-surface-3); color: var(--clr-text-2); }

.action-btn--success {
  background: var(--clr-success) !important;
  color: #fff !important;
}

/* ---------------------------------------------------------
   14. Error Banner
   --------------------------------------------------------- */
.error-banner[hidden] { display: none; }

.error-banner {
  width: 100%;
  max-width: var(--card-width);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--clr-error-bg);
  border: 1px solid #fca5a5;
  border-radius: var(--radius-lg);
  color: var(--clr-error);
  font-size: var(--fz-sm);
  font-weight: 500;
  animation: slideUp var(--transition-base) both;
}

.error-banner svg { width: 20px; height: 20px; flex-shrink: 0; margin-top: 1px; }

/* ---------------------------------------------------------
   15. Info / FAQ Section
   --------------------------------------------------------- */
.info-section,
.usecases-section {
  padding-block: var(--space-16);
  border-top: 1px solid var(--clr-border);
}

.info-section { background: var(--clr-surface); }
.howto-section { background: var(--clr-brand-light); border-top: 1px solid var(--clr-border); padding-block: var(--space-16); }
.usecases-section { background: var(--clr-surface-2); }

.section-heading {
  font-size: var(--fz-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--clr-text);
  text-align: center;
  margin-bottom: var(--space-8);
}

/* FAQ */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-4);
  max-width: 900px;
  margin-inline: auto;
}

.faq-item {
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  background: var(--clr-surface);
  overflow: hidden;
  transition: box-shadow var(--transition-base);
}

.faq-item:hover { box-shadow: var(--shadow-md); }

.faq-item[open] { box-shadow: var(--shadow-md); }

.faq-question {
  padding: var(--space-4) var(--space-5);
  font-size: var(--fz-sm);
  font-weight: 600;
  color: var(--clr-text-2);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
}

.faq-question::after {
  content: '+';
  font-size: var(--fz-xl);
  color: var(--clr-brand);
  flex-shrink: 0;
  font-weight: 400;
  line-height: 1;
}

.faq-item[open] .faq-question::after { content: '−'; }

.faq-answer {
  padding: 0 var(--space-5) var(--space-4);
  font-size: var(--fz-sm);
  color: var(--clr-text-muted);
  line-height: 1.7;
}

/* Use Cases */
.usecases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-6);
  max-width: 900px;
  margin-inline: auto;
}

.usecase-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  text-align: center;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.usecase-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.usecase-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: var(--space-3);
}

.usecase-title {
  font-size: var(--fz-base);
  font-weight: 600;
  color: var(--clr-text);
  margin-bottom: var(--space-2);
}

.usecase-desc {
  font-size: var(--fz-sm);
  color: var(--clr-text-muted);
  line-height: 1.6;
}

/* HowTo Steps */
.howto-steps {
  list-style: none;
  max-width: 700px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  counter-reset: none;
}

.howto-step {
  display: flex;
  align-items: flex-start;
  gap: var(--space-5);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: var(--space-5) var(--space-6);
  box-shadow: var(--shadow-sm);
}

.step-num {
  flex-shrink: 0;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-full);
  background: var(--clr-brand);
  color: #fff;
  font-size: var(--fz-base);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-title {
  font-size: var(--fz-base);
  font-weight: 600;
  color: var(--clr-text);
  margin-bottom: var(--space-1);
}

.step-desc {
  font-size: var(--fz-sm);
  color: var(--clr-text-muted);
  line-height: 1.6;
}

/* ---------------------------------------------------------
   16. Footer
   --------------------------------------------------------- */
.site-footer {
  background: var(--clr-text);
  color: #9ca3af;
  padding-block: var(--space-8);
  margin-top: auto;
}

.site-footer .container {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-copy { font-size: var(--fz-sm); }
.footer-made { font-size: var(--fz-sm); color: #6b7280; }

/* ---------------------------------------------------------
   17. Responsive
   --------------------------------------------------------- */
@media (max-width: 640px) {
  .header-tagline { display: none; }

  .hero { padding-block: var(--space-8) var(--space-6); }

  .tab-btn {
    padding: var(--space-2) var(--space-3);
    font-size: var(--fz-xs);
    gap: var(--space-1);
  }

  .panels-wrapper { padding: var(--space-4); }

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

  .field-group--sm { max-width: 100%; }

  .customise-section { margin-inline: var(--space-4); }

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

  .generate-btn {
    width: calc(100% - var(--space-8));
    margin-inline: var(--space-4);
    margin-bottom: var(--space-4);
  }

  .qr-output { padding: var(--space-5); }

  .action-btns { flex-direction: column; align-items: stretch; }

  .faq-grid { grid-template-columns: 1fr; }
  .usecases-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 400px) {
  .usecases-grid { grid-template-columns: 1fr; }
}

/* ---------------------------------------------------------
   18. Print
   --------------------------------------------------------- */
@media print {
  .site-header,
  .hero,
  .app-card,
  .action-btns,
  .info-section,
  .howto-section,
  .usecases-section,
  .site-footer { display: none !important; }

  .qr-output {
    box-shadow: none;
    border: none;
    padding: 0;
  }
}

/* ---------------------------------------------------------
   19. Reduced Motion
   --------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}