/* ============================================================
   QR Code Generator — styles.css
   Mobile-first, fluid typography, dark mode support
   ============================================================ */

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

:root {
  /* Color palette */
  --color-primary:       #6366f1;
  --color-primary-hover: #4f46e5;
  --color-primary-light: #eef2ff;
  --color-danger:        #ef4444;
  --color-success:       #22c55e;
  --color-warning:       #f59e0b;
  --color-warning-bg:    #fffbeb;
  --color-warning-border:#fde68a;

  /* Neutrals */
  --color-bg:            #f8fafc;
  --color-surface:       #ffffff;
  --color-surface-2:     #f1f5f9;
  --color-border:        #e2e8f0;
  --color-text:          #0f172a;
  --color-text-muted:    #64748b;
  --color-text-xmuted:   #94a3b8;

  /* Header */
  --color-header-bg:     #ffffff;
  --color-header-border: #e2e8f0;

  /* Shadows */
  --shadow-sm:  0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md:  0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.05);
  --shadow-lg:  0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.05);
  --shadow-xl:  0 20px 25px -5px rgb(0 0 0 / 0.10), 0 8px 10px -6px rgb(0 0 0 / 0.05);

  /* Radii */
  --radius-sm:  0.375rem;
  --radius-md:  0.625rem;
  --radius-lg:  1rem;
  --radius-xl:  1.25rem;
  --radius-full: 9999px;

  /* 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;

  /* Typography (fluid) */
  --text-xs:   clamp(0.7rem,  1.5vw, 0.75rem);
  --text-sm:   clamp(0.8rem,  1.8vw, 0.875rem);
  --text-base: clamp(0.9rem,  2vw,   1rem);
  --text-lg:   clamp(1rem,    2.2vw, 1.125rem);
  --text-xl:   clamp(1.1rem,  2.5vw, 1.25rem);
  --text-2xl:  clamp(1.25rem, 3vw,   1.5rem);
  --text-3xl:  clamp(1.5rem,  3.5vw, 1.875rem);

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

/* Dark mode */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg:            #0f172a;
    --color-surface:       #1e293b;
    --color-surface-2:     #253348;
    --color-border:        #334155;
    --color-text:          #f1f5f9;
    --color-text-muted:    #94a3b8;
    --color-text-xmuted:   #64748b;
    --color-header-bg:     #1e293b;
    --color-header-border: #334155;
    --color-primary-light: #1e1b4b;
    --color-warning-bg:    #451a03;
    --color-warning-border:#92400e;
  }
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

/* ── Utilities ──────────────────────────────────────────────── */
.hidden    { display: none !important; }
.mt-3      { margin-top: var(--space-3); }
.mt-4      { margin-top: var(--space-4); }
.container {
  width: 100%;
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

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

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.header__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.header__logo {
  width: 28px;
  height: 28px;
  color: var(--color-primary);
  flex-shrink: 0;
}

.header__title {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--color-primary), #818cf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header__auth {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.auth-section {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.auth-email {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.625rem 1.25rem;
  min-height: 44px;
  min-width: 44px;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast),
              border-color var(--transition-fast), box-shadow var(--transition-fast),
              transform var(--transition-fast);
  white-space: nowrap;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.btn:active { transform: scale(0.97); }
.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

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

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn--primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  box-shadow: 0 4px 12px rgb(99 102 241 / 0.35);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn--outline:hover:not(:disabled) {
  background: var(--color-primary-light);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-muted);
  border-color: transparent;
}
.btn--ghost:hover:not(:disabled) {
  background: var(--color-surface-2);
  color: var(--color-text);
}

.btn--sm {
  padding: 0.375rem 0.75rem;
  min-height: 36px;
  font-size: var(--text-xs);
}

.btn--full { width: 100%; }

/* ── Forms ───────────────────────────────────────────────────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
}

.form-input {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: var(--text-base);
  min-height: 44px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgb(99 102 241 / 0.15);
}

.form-input::placeholder { color: var(--color-text-xmuted); }

.form-textarea {
  resize: vertical;
  min-height: 88px;
}

.form-select {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: var(--text-sm);
  min-height: 44px;
  cursor: pointer;
  outline: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 16px;
  padding-right: 2.5rem;
}

.form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgb(99 102 241 / 0.15);
}

/* Char counter */
.char-counter {
  font-size: var(--text-xs);
  color: var(--color-text-xmuted);
  text-align: right;
  margin-top: var(--space-1);
}
.char-counter.warn { color: var(--color-warning); }
.char-counter.danger { color: var(--color-danger); }

/* ── Tabs ────────────────────────────────────────────────────── */
.tabs {
  display: flex;
  gap: var(--space-1);
  padding: var(--space-1);
  background: var(--color-surface-2);
  border-radius: var(--radius-md);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab {
  flex: 1;
  padding: 0.5rem 0.75rem;
  min-height: 44px;
  min-width: 64px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
}

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

.tab--active {
  background: var(--color-surface);
  color: var(--color-primary);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

/* ── Color Input ─────────────────────────────────────────────── */
.color-input-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.5rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  min-height: 44px;
}

.color-input {
  width: 36px;
  height: 28px;
  border: none;
  background: none;
  cursor: pointer;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  padding: 0;
}

.color-hex {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-family: 'SF Mono', 'Fira Code', monospace;
}

/* ── Range Input ─────────────────────────────────────────────── */
.range-input {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-border);
  outline: none;
  cursor: pointer;
}

.range-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  box-shadow: 0 2px 4px rgb(0 0 0 / 0.2);
  transition: transform var(--transition-fast);
}

.range-input::-webkit-slider-thumb:hover { transform: scale(1.15); }
.range-input::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  border: none;
}

/* ── File Upload ─────────────────────────────────────────────── */
.file-upload-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.file-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.file-upload-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.5rem 1rem;
  min-height: 44px;
  border: 1.5px dashed var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast);
  flex: 1;
}

.file-upload-label:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.file-upload-label svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* ── Cards ───────────────────────────────────────────────────── */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: clamp(1.25rem, 4vw, 2rem);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  box-shadow: var(--shadow-md);
}

.card__title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.card__subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: calc(-1 * var(--space-3));
}

/* ── Customization Panel ─────────────────────────────────────── */
.customization-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--color-surface-2);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.customization-panel__title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
}

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

/* ── Download Actions ────────────────────────────────────────── */
.download-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.download-actions .btn {
  flex: 1;
  min-width: 120px;
}

/* ── Preview Panel ───────────────────────────────────────────── */
.preview-panel {
  position: sticky;
  top: 76px;
  height: fit-content;
}

.preview-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: clamp(1.25rem, 4vw, 2rem);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  align-items: center;
}

.preview-card__title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
  align-self: flex-start;
}

.preview-area {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 200px;
}

.qr-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-8);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text-xmuted);
  width: 100%;
  text-align: center;
  font-size: var(--text-sm);
}

.qr-placeholder svg {
  width: 64px;
  height: 64px;
  opacity: 0.3;
}

.qr-output {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  max-width: 100%;
}

/* Override QR code library table styles */
.qr-output table { border: none !important; }
.qr-output td { padding: 0 !important; }

.qr-canvas-container {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.qr-canvas-container canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

.qr-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgb(var(--color-surface) / 0.8);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(2px);
}

/* ── Short URL Display ───────────────────────────────────────── */
.short-url-display {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-primary-light);
  border: 1px solid rgb(99 102 241 / 0.3);
  border-radius: var(--radius-md);
  width: 100%;
  flex-wrap: wrap;
}

.short-url-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.short-url-link {
  font-size: var(--text-sm);
  color: var(--color-primary);
  text-decoration: none;
  word-break: break-all;
  flex: 1;
  font-weight: 500;
}

.short-url-link:hover { text-decoration: underline; }

/* ── Spinner ─────────────────────────────────────────────────── */
.spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 2.5px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

.spinner--sm {
  width: 14px;
  height: 14px;
  border-width: 2px;
}

.spinner--lg {
  width: 40px;
  height: 40px;
  border-width: 3.5px;
}

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

/* ── Toast ───────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: clamp(1rem, 4vw, 1.5rem);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--color-text);
  color: var(--color-bg);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  box-shadow: var(--shadow-xl);
  z-index: 9999;
  max-width: min(480px, 90vw);
  text-align: center;
  pointer-events: none;
  transition: transform var(--transition-slow), opacity var(--transition-slow);
  opacity: 0;
}

.toast.toast--visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.toast.toast--success { background: var(--color-success); color: #fff; }
.toast.toast--error   { background: var(--color-danger);  color: #fff; }
.toast.toast--warning { background: var(--color-warning); color: #fff; }

/* ── Notice Banner ───────────────────────────────────────────── */
.notice {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
}

.notice svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.notice--warning {
  background: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  color: var(--color-warning);
}

/* ── Saved QR List ───────────────────────────────────────────── */
.saved-qr-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.saved-qr-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.saved-qr-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
}

.saved-qr-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-height: 400px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

/* Scrollbar styling */
.saved-qr-list::-webkit-scrollbar { width: 4px; }
.saved-qr-list::-webkit-scrollbar-track { background: transparent; }
.saved-qr-list::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
}

.saved-qr-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.saved-qr-item:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgb(99 102 241 / 0.1);
}

.saved-qr-item__info {
  flex: 1;
  overflow: hidden;
}

.saved-qr-item__type {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.saved-qr-item__data {
  font-size: var(--text-sm);
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: var(--space-1);
}

.saved-qr-item__meta {
  font-size: var(--text-xs);
  color: var(--color-text-xmuted);
  margin-top: var(--space-1);
}

.saved-qr-item__short-url {
  font-size: var(--text-xs);
  color: var(--color-primary);
  text-decoration: none;
}

.saved-qr-item__short-url:hover { text-decoration: underline; }

.saved-qr-item__actions {
  display: flex;
  gap: var(--space-1);
  flex-shrink: 0;
}

/* ── Empty / Loading States ──────────────────────────────────── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-8) var(--space-4);
  color: var(--color-text-xmuted);
  font-size: var(--text-sm);
  text-align: center;
}

.empty-state svg {
  width: 40px;
  height: 40px;
  opacity: 0.4;
}

.loading-state {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  justify-content: center;
  padding: var(--space-6);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* ── Modal ───────────────────────────────────────────────────── */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgb(0 0 0 / 0.5);
  backdrop-filter: blur(4px);
}

.modal__content {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: clamp(1.5rem, 4vw, 2rem);
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow-xl);
  animation: modal-in var(--transition-slow) ease;
}

@keyframes modal-in {
  from { opacity: 0; transform: scale(0.93) translateY(8px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.modal__close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 32px;
  height: 32px;
  min-height: unset;
  border: none;
  background: var(--color-surface-2);
  color: var(--color-text-muted);
  font-size: 1.25rem;
  line-height: 1;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
}

.modal__close:hover {
  background: var(--color-border);
  color: var(--color-text);
}

.modal__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  letter-spacing: -0.02em;
}

.modal__subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}

/* ── Login Form ──────────────────────────────────────────────── */
.login-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.login-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-6);
  text-align: center;
  color: var(--color-success);
  font-size: var(--text-base);
  font-weight: 500;
}

.login-success svg {
  width: 48px;
  height: 48px;
}

/* Edit modal actions */
.edit-modal-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
}

/* ── Main Layout ─────────────────────────────────────────────── */
.main {
  flex: 1;
  padding-block: clamp(1.5rem, 4vw, 2.5rem);
}

.app-layout {
  display: flex;
  flex-direction: column;
  gap: clamp(1.25rem, 3vw, 1.5rem);
}

.controls-panel {
  display: flex;
  flex-direction: column;
  gap: clamp(1.25rem, 3vw, 1.5rem);
}

/* ── Footer ──────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-5);
  text-align: center;
  color: var(--color-text-xmuted);
  font-size: var(--text-xs);
}

/* ── Responsive: Tablet / PC (>= 768px) ──────────────────────── */
@media (min-width: 768px) {
  .app-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
    gap: clamp(1.5rem, 3vw, 2rem);
  }

  .preview-panel { top: 76px; }

  .download-actions .btn { flex: unset; }
}

/* ── Responsive: Ultrawide (> 1440px) ───────────────────────── */
@media (min-width: 1441px) {
  .container {
    max-width: 1440px;
  }
}

/* ── Focus Visible ───────────────────────────────────────────── */
:focus-visible {
  outline: 2.5px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ── Reduced Motion ──────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}