/* ==========================================================================
   UAVs Meet Embodied Intelligence - Embodied Perception Paper Archive
   Inspired by Corentin Bernadou Archive (corentinbernadou.com/archive)
   Split directory table with transparent background, 1-to-1 cursor sync,
   WebGL 3D hyperbolic bend deformation, and 3D flip card detail integration.
   ========================================================================== */

.paper-archive-hidden {
  display: none !important;
}

.perception-archive {
  width: 100%;
  max-width: 1420px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  padding: 0 1.5rem;
  position: relative;
  z-index: 10;
  box-sizing: border-box;
}

/* Toolbar (Exact User Screenshot Style) */
.archive-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  width: 100%;
  padding: 0.2rem 0.2rem 1.6rem;
  border-bottom: none; /* No underline across toolbar */
  box-sizing: border-box;
  gap: 1.5rem;
}

.archive-toolbar__left {
  flex: 0 0 auto;
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
}

.search-label {
  font-family: var(--font-mono, monospace);
  font-size: 0.82rem;
  color: #64748b;
  letter-spacing: 0.02em;
  user-select: none;
}

.archive-search-input {
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(16, 38, 57, 0.28);
  border-radius: 0;
  padding: 2px 4px 3px;
  font-family: var(--font-sans, sans-serif);
  font-size: 0.85rem;
  color: #102639;
  width: 220px;
  outline: none;
  transition: border-bottom-color 0.2s ease;
}

.archive-search-input:focus {
  border-bottom-color: #102639;
}

.archive-search-input::placeholder {
  color: #94a3b8;
}

.archive-toolbar__right {
  flex: 0 0 auto;
  font-family: var(--font-mono, monospace);
  font-size: 0.82rem;
  color: #64748b;
  letter-spacing: 0.02em;
}

/* Split Exhibition Grid Layout - 50% / 50% Balanced Proportions */
.archive-exhibition {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 2.5rem;
  width: 100%;
  max-width: 1420px;
  margin: 0 auto;
  height: calc(100svh - 220px);
  min-height: 540px;
  box-sizing: border-box;
  overflow: visible;
}

/* Left Column: Paper Directory (Completely Transparent, matches original page background) */
.archive-directory {
  min-width: 0;
  display: flex;
  flex-direction: column;
  background: transparent; /* STRICTLY NO WHITE BACKGROUND */
  border: none;
  box-shadow: none;
  backdrop-filter: none;
  overflow: hidden;
}

/* Hidden Scrollbar (Removes the middle grey vertical bar completely) */
.archive-list {
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-y: auto;
  flex: 1 1 auto;
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* IE / Edge */
}

.archive-list::-webkit-scrollbar {
  display: none; /* Chrome, Safari, WebKit */
  width: 0;
  height: 0;
}

/* Row Item Button (5 Columns: Index, Title, Type, Venue, Code) */
.archive-item-btn {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) 75px 105px 50px;
  gap: 12px;
  align-items: start;
  width: 100%;
  padding: 1.15rem 0.2rem;
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(16, 38, 57, 0.07);
  text-align: left;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.22, 1, 0.36, 1);
  user-select: none;
}

/* Hover & Active States */
.archive-item-btn:hover {
  background: rgba(16, 38, 57, 0.02);
}

.archive-item-btn.is-active {
  background: rgba(16, 38, 57, 0.02) !important;
}

.archive-item-idx {
  font-family: var(--font-mono, monospace);
  font-size: 0.72rem;
  font-weight: 500;
  color: #8a98a4;
  padding-top: 3px;
  letter-spacing: 0.04em;
}

.archive-item-btn.is-active .archive-item-idx {
  color: #102639;
  font-weight: 600;
}

.archive-item-title-block {
  min-width: 0;
}

.archive-item-title-text {
  font-family: var(--font-sans, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif);
  font-size: 1.04rem;
  font-weight: 420;
  color: #556677;
  line-height: 1.38;
  word-break: break-word;
  transition: color 0.18s ease;
}

.archive-item-btn.is-active .archive-item-title-text {
  color: var(--color-navy, #102639);
  font-weight: 500;
}

.archive-item-btn:hover .archive-item-title-text {
  color: var(--color-navy, #102639);
}

.archive-item-type {
  font-family: var(--font-sans, sans-serif);
  font-size: 0.88rem;
  color: #7b8b97;
  padding-top: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.archive-item-venue {
  font-family: var(--font-sans, sans-serif);
  font-size: 0.88rem;
  color: #7b8b97;
  padding-top: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.archive-item-code {
  font-family: var(--font-mono, monospace);
  font-size: 0.82rem;
  color: #7b8b97;
  padding-top: 4px;
  white-space: nowrap;
  text-align: right;
}

.archive-item-code-link {
  color: var(--color-orange-ink, #d7582a);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.15s ease;
}

.archive-item-code-link:hover {
  color: var(--color-navy, #102639);
  text-decoration: underline;
}

.archive-item-code-placeholder {
  color: #a0acb8;
  font-weight: 500;
}

.archive-empty {
  padding: 3rem 1.5rem;
  text-align: center;
  font-family: var(--font-mono, monospace);
  font-size: 0.85rem;
  color: #7b8893;
}

/* Right Column: Preview Stage (Centered & Fully Visible, Not Clipped) */
/* Right Column: Preview Stage (Floating 3D Paper Photo Cards) */
.archive-stage {
  min-width: 0;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  position: relative;
  perspective: 1000px;
  padding: 1.5rem 1rem;
  box-sizing: border-box;
  overflow: visible;
  cursor: pointer;
  outline: none;
  background: transparent;
  border: none;
  box-shadow: none;
}

/* Floating Flip Affordance Badge at Bottom of Stage */
.archive-stage-hint {
  position: absolute;
  bottom: 1.2rem;
  z-index: 10;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.22s ease, opacity 0.22s ease;
}

.archive-stage:hover .archive-stage-hint {
  transform: translateY(-2px);
}

.flip-hint-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono, monospace);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #ffffff;
  background: rgba(16, 38, 57, 0.88);
  padding: 6px 14px;
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(16, 38, 57, 0.2);
  backdrop-filter: blur(8px);
  transition: all 0.2s ease;
}

.archive-stage:hover .flip-hint-badge {
  background: var(--color-orange-ink, #d7582a);
  box-shadow: 0 8px 26px rgba(215, 88, 42, 0.35);
}

.flip-hint-icon {
  font-size: 0.95rem;
  line-height: 1;
}

/* WebGL Container */
.perception-webgl-container {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 2;
}

/* Responsive Rules */
@media (max-width: 1080px) {
  .archive-exhibition {
    grid-template-columns: 1fr;
    height: auto;
    min-height: 0;
    gap: 1.5rem;
  }
  .archive-directory {
    width: 100%;
    height: 420px;
  }
  .archive-stage {
    width: 100%;
    padding: 1rem 0;
  }
  .archive-card-frame {
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  .archive-toolbar {
    flex-direction: column;
    align-items: flex-start;
  }
  .archive-search-input {
    width: 100%;
  }
  .archive-table-header {
    grid-template-columns: 36px minmax(0, 1fr) 70px 50px;
  }
  .col-type {
    display: none;
  }
  .archive-item-btn {
    grid-template-columns: 36px minmax(0, 1fr) 70px 50px;
    padding: 0.75rem 0.6rem;
  }
  .archive-item-type {
    display: none;
  }
}