:root {
  color-scheme: light;
}

body {
  font-family: "Inter", "Segoe UI", sans-serif;
  background: #f5f7fb;
}

.login-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(2px);
  z-index: 2000;
}

.login-card {
  width: min(420px, 92vw);
  background: #fff;
  padding: 2rem;
  border-radius: 16px;
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.2);
}

.navbar {
  background: linear-gradient(120deg, #1b3a57, #2e5f8a);
}

.navbar-brand {
  font-weight: 600;
  color: #fff !important;
}

.session-badge {
  font-size: 0.85rem;
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  padding: 0.3rem 0.6rem;
  border-radius: 999px;
  border: none;
}

.session-badge.dropdown-toggle::after {
  margin-left: 0.4rem;
}

.session-dropdown .dropdown-menu {
  min-width: 200px;
}

.card {
  border: none;
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
}

.sidebar-card {
  position: sticky;
  top: 1.5rem;
}

.pdf-card {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.pdf-card.selectable {
  cursor: pointer;
}

.pdf-card.selected {
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.8), 0 16px 32px rgba(15, 23, 42, 0.16);
}

.pdf-card.recent-output {
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.9), 0 18px 36px rgba(16, 185, 129, 0.25);
  transform: translateY(-2px);
}

.pdf-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 32px rgba(15, 23, 42, 0.16);
}

.pdf-thumb {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-bottom: 1px solid #e5e7eb;
  background: #ffffff;
}

.thumb-error {
  background: repeating-linear-gradient(
    45deg,
    #f8fafc,
    #f8fafc 10px,
    #e2e8f0 10px,
    #e2e8f0 20px
  );
}

.section-title {
  font-weight: 600;
  color: #0f172a;
}

.file-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: #e0f2fe;
  color: #0f172a;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.85rem;
}

#previewFrame {
  width: 100%;
  height: 70vh;
  border: none;
}

.preview-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.preview-title-wrap {
  flex: 1;
  min-width: 0;
}

.preview-actions {
  margin-left: auto;
}

.preview-modal-dim .modal-body,
.preview-modal-dim .modal-header {
  position: relative;
}

.preview-modal-dim .modal-body::after,
.preview-modal-dim .modal-header::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.35);
  z-index: 2;
  pointer-events: none;
}

.action-btn {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.action-btn i {
  font-size: 0.95rem;
}

.selection-panel {
  min-height: 80px;
}

.selection-indicator {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid #cbd5f5;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  background: #fff;
  flex-shrink: 0;
}

.pdf-card.selected .selection-indicator {
  background: #22c55e;
  border-color: #22c55e;
}

.arrange-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 1rem;
}

.arrange-card {
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  background: #fff;
  padding: 0.5rem;
  box-shadow: 0 8px 16px rgba(15, 23, 42, 0.08);
  cursor: grab;
  user-select: none;
}

.arrange-card:active {
  cursor: grabbing;
}

.arrange-card.dragging {
  opacity: 0.6;
  border-color: #60a5fa;
}

.arrange-thumb {
  width: 100%;
  aspect-ratio: 3 / 4;
  background: #f8fafc;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.arrange-thumb canvas,
.arrange-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.arrange-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: #334155;
  margin-top: 0.5rem;
  text-align: center;
}

.images-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
}

.images-card {
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  background: #fff;
  padding: 0.75rem;
  box-shadow: 0 8px 16px rgba(15, 23, 42, 0.08);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.images-thumb {
  width: 100%;
  height: 140px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid #e5e7eb;
  background: #f8fafc;
}

.images-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: #0f172a;
  word-break: break-all;
}

.images-actions {
  display: flex;
  justify-content: flex-end;
}

.session-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}

.session-card {
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  background: #fff;
  padding: 0.85rem;
  box-shadow: 0 8px 16px rgba(15, 23, 42, 0.08);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.session-card-cover {
  width: 100%;
  height: 140px;
  border-radius: 10px;
  border: 1px solid #e5e7eb;
  background: #f8fafc;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  font-size: 0.8rem;
}

.session-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.session-card-placeholder {
  font-size: 2.25rem;
  font-weight: 700;
  color: #475569;
  letter-spacing: 0.08em;
}

.session-card-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: #0f172a;
  word-break: break-word;
}

.session-card-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
}