/* ========================================== */
/* SECTION 1: Main Container & Layout Styling */
/* ========================================== */
.app-wrapper {
  position: relative;
  z-index: 1;
  width: 90%;
  max-width: 720px;
  margin: 30px auto;
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 22px 25px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.app-header {
  text-align: center;
  margin-bottom: 16px;
}

.app-header h1 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.app-header h1 span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.app-header p {
  color: var(--text-muted);
  font-size: 12px;
  margin-top: 4px;
  line-height: 1.4;
}

/* ========================================== */
/* SECTION 2: Mode Selector & Upload Area    */
/* ========================================== */
.mode-selector {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.mode-tab {
  flex: 1;
  background: var(--input-bg);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 10px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  transition: 0.2s;
}

.mode-tab.active {
  background: var(--accent-gradient);
  color: #fff;
  border-color: transparent;
}

.drop-zone {
  border: 2px dashed var(--border-color);
  border-radius: 12px;
  padding: 30px 20px;
  text-align: center;
  background: var(--input-bg);
  cursor: pointer;
  transition: 0.2s;
}

.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--accent-color);
  background: rgba(225, 29, 72, 0.05);
}

.upload-icon {
  color: var(--accent-color);
  margin-bottom: 10px;
}

.drop-zone p {
  font-size: 13px;
  color: var(--text-muted);
}

.browse-link {
  color: var(--accent-color);
  font-weight: 600;
  text-decoration: underline;
}

/* ========================================== */
/* SECTION 3: Preview Area & Card Grid       */
/* ========================================== */
.preview-area {
  margin-top: 20px;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
}

.preview-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  flex-wrap: wrap;
  gap: 10px;
}

.header-title-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.preview-header span {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
}

.reorder-hint {
  font-size: 11px !important;
  font-weight: 400 !important;
  color: var(--text-muted) !important;
}

.action-buttons {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.progress-container {
  width: 100%;
  height: 6px;
  background: var(--input-bg);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 14px;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--accent-gradient);
  transition: width 0.3s ease;
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
  max-height: 350px;
  overflow-y: auto;
  padding-right: 4px;
}

/* Draggable Preview Card */
.preview-card {
  background: var(--input-bg);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 8px;
  text-align: center;
  position: relative;
  transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;
  user-select: none;
}

.preview-card[draggable="true"] {
  cursor: grab;
}

.preview-card.dragging {
  opacity: 0.4;
  border-color: var(--accent-color);
}

.preview-card.drag-over {
  border: 2px dashed var(--accent-color);
  transform: scale(1.02);
}

/* Page Badge Styling */
.page-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(13, 17, 23, 0.85);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 6px;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  z-index: 2;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.preview-card img {
  width: 100%;
  height: 120px;
  object-fit: contain;
  border-radius: 6px;
  background: #111827;
  pointer-events: none; /* Prevents native image drag collision */
}

.preview-card p {
  font-size: 11px;
  color: var(--text-muted);
  margin: 6px 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Card Individual Buttons */
.card-btn-group {
  display: flex;
  gap: 4px;
}

.card-btn {
  flex: 1;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  border-radius: 4px;
  padding: 4px;
  font-size: 10px;
  font-weight: 600;
  cursor: pointer;
  transition: 0.2s;
}

.card-btn:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.card-btn.primary {
  background: var(--accent-gradient);
  color: #fff;
  border: none;
}

.card-btn.danger {
  color: #ef4444;
}

.card-btn.danger:hover {
  border-color: #ef4444;
  background: rgba(239, 68, 68, 0.1);
}

.action-btn {
  background: var(--input-bg);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: 0.2s;
}

.action-btn:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.primary-btn {
  background: var(--accent-gradient);
  color: #fff;
  border: none;
}

.primary-btn:hover {
  opacity: 0.9;
  color: #fff;
}

/* ========================================== */
/* SECTION 4: Enlarged Modal Preview Styling */
/* ========================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.82);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 15px;
}

.modal-content {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  width: 92%;
  max-width: 1100px;
  height: 88vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.modal-header {
  padding: 12px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(0, 0, 0, 0.2);
}

.modal-header span {
  font-weight: 700;
  color: var(--text-main);
}

.modal-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.open-tab-btn {
  background: var(--input-bg);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 5px 12px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: 0.2s;
}

.open-tab-btn:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
  line-height: 1;
  transition: 0.2s;
}

.modal-close:hover {
  color: #ef4444;
}

.modal-body {
  padding: 12px;
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  background: #0d1117;
}

.modal-body img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 6px;
}

.modal-body iframe {
  width: 100%;
  height: 100%;
  border: none;
  border-radius: 6px;
}