:root {
  --ad-leaderboard-h: 90px;
  --ad-mobile-h: 100px;
  --ring-indigo: 99 102 241;
}

html {
  scroll-behavior: smooth;
}

body {
  font-feature-settings: "cv02", "cv03", "cv04", "cv11";
}

.bg-grid {
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgb(199 210 254 / 0.55), transparent),
    linear-gradient(to bottom, transparent, rgb(248 250 252)),
    linear-gradient(rgb(226 232 240 / 0.35) 1px, transparent 1px),
    linear-gradient(90deg, rgb(226 232 240 / 0.35) 1px, transparent 1px);
  background-size: auto, auto, 48px 48px, 48px 48px;
}

.ad-slot {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: var(--ad-mobile-h);
  background: #f8fafc;
  border: 1px dashed #cbd5e1;
  border-radius: 0.75rem;
  overflow: hidden;
}

.ad-slot.is-pending,
.ad-slot[hidden] {
  display: none;
  min-height: 0;
  margin: 0;
  border: none;
}

.ad-slot-inner {
  color: #94a3b8;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  user-select: none;
}

@media (min-width: 768px) {
  .ad-slot {
    min-height: var(--ad-leaderboard-h);
  }
}

.tab-btn[aria-selected="true"] {
  background: #4f46e5;
  color: #fff;
  box-shadow: 0 10px 15px -3px rgb(79 70 229 / 0.25);
}

.tab-btn[aria-selected="false"] {
  background: transparent;
  color: #475569;
}

.dropzone.is-dragover {
  border-color: #6366f1;
  background: rgb(238 242 255 / 0.85);
  transform: scale(1.01);
}

.dropzone.is-compact {
  padding: 1.25rem 1rem;
}

.dropzone.is-compact .dropzone-lead {
  display: none;
}

.file-card.is-dragging {
  opacity: 0.45;
  transform: scale(0.98);
}

.file-card.is-drag-over {
  outline: 2px dashed #6366f1;
  outline-offset: 2px;
}

.page-card {
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.page-card:hover {
  transform: translateY(-2px);
}

.page-card.is-selected {
  border-color: #4f46e5;
  box-shadow: 0 0 0 3px rgb(79 70 229 / 0.22);
}

.page-card.is-dragging {
  opacity: 0.45;
  transform: scale(0.98);
}

.page-card.is-drag-over {
  outline: 2px dashed #6366f1;
  outline-offset: 2px;
}

.page-card.is-sortable {
  cursor: grab;
}

.page-card.is-sortable:active {
  cursor: grabbing;
}

.page-card canvas {
  width: 100%;
  height: auto;
  display: block;
  background: #fff;
}

.page-card canvas[hidden] {
  display: none;
}

.thumb-skeleton {
  background: linear-gradient(90deg, #e2e8f0 0%, #f1f5f9 50%, #e2e8f0 100%);
  background-size: 200% 100%;
  animation: shimmer 1.2s ease-in-out infinite;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-up {
  animation: fade-up 280ms ease both;
}

.toast {
  animation: fade-up 220ms ease both;
}

.success-modal {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  padding: 1.25rem;
}

.success-modal[hidden],
.success-modal.hidden {
  display: none;
}

.success-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgb(15 23 42 / 0.55);
  backdrop-filter: blur(6px);
}

.success-modal-card {
  position: relative;
  width: min(32rem, 100%);
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 1.25rem;
  padding: 1.75rem 1.5rem 1.5rem;
  text-align: center;
  box-shadow: 0 25px 50px -12px rgb(15 23 42 / 0.35);
}

.progress-bar {
  width: 0%;
  transition: width 180ms ease;
}

.btn-primary:disabled,
.btn-secondary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .fade-up,
  .toast,
  .thumb-skeleton,
  .page-card,
  .dropzone,
  .success-modal-card {
    animation: none !important;
    transition: none !important;
  }
}