/* EduResource ZA — StuDocu & Scribd Style Similar Resources Component */
/* Version: 20261025-v2 (Real PDF Document Previews) */

.reader-similar-section {
  margin: 36px auto 24px;
  width: 100%;
  max-width: 1400px;
  padding: 0 16px;
}

.reader-similar-wrapper {
  background: var(--edu-card, #ffffff);
  border: 1px solid var(--edu-line, #e2e8f0);
  border-radius: 16px;
  padding: 24px 28px;
  box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
  transition: all 0.2s ease;
}

.dark .reader-similar-wrapper {
  background: #111827;
  border-color: #1f2937;
  box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.4);
}

/* Header & Controls */
.reader-similar-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--edu-line, #e2e8f0);
}

.dark .reader-similar-header {
  border-bottom-color: #1f2937;
}

.reader-similar-title-group {
  flex: 1;
  min-width: 260px;
}

.reader-similar-eyebrow {
  display: block;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #e11d48;
  margin-bottom: 4px;
}

.dark .reader-similar-eyebrow {
  color: #f43f5e;
}

.reader-similar-title {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 4px;
  color: var(--edu-text, #0f172a);
}

.dark .reader-similar-title {
  color: #f8fafc;
}

.reader-similar-subtitle {
  font-size: 13px;
  color: var(--edu-muted, #64748b);
  margin: 0;
}

.reader-similar-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

/* Filter Pills (Brand Red Active) */
.reader-similar-filters {
  display: inline-flex;
  background: var(--edu-bg, #f8fafc);
  border: 1px solid var(--edu-line, #e2e8f0);
  border-radius: 999px;
  padding: 3px;
  gap: 4px;
}

.dark .reader-similar-filters {
  background: #1e293b;
  border-color: #334155;
}

.similar-filter-pill {
  border: 0;
  background: transparent;
  color: var(--edu-muted, #64748b);
  font-size: 11px;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.similar-filter-pill:hover {
  color: var(--edu-text, #0f172a);
}

.dark .similar-filter-pill:hover {
  color: #f8fafc;
}

.similar-filter-pill.is-active {
  background: #e11d48 !important;
  color: #ffffff !important;
  box-shadow: 0 2px 8px rgba(225, 29, 72, 0.4) !important;
}

/* Scroll Arrows */
.reader-similar-nav-arrows {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.similar-arrow-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  min-width: 34px;
  min-height: 34px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--edu-line, #e2e8f0);
  background: var(--edu-card, #ffffff);
  color: var(--edu-text, #0f172a);
  cursor: pointer;
  transition: all 0.15s ease;
}

.similar-arrow-btn svg {
  width: 16px !important;
  height: 16px !important;
  min-width: 16px !important;
  min-height: 16px !important;
  display: block !important;
  stroke: currentColor !important;
  fill: none !important;
  flex-shrink: 0 !important;
}

html.dark .similar-arrow-btn,
.dark .similar-arrow-btn {
  background: #1e293b !important;
  border-color: #334155 !important;
  color: #ffffff !important;
}

html.dark .similar-arrow-btn svg,
.dark .similar-arrow-btn svg {
  stroke: #ffffff !important;
  color: #ffffff !important;
}

.similar-arrow-btn:hover {
  background: #e11d48 !important;
  border-color: #e11d48 !important;
  color: #ffffff !important;
  transform: scale(1.05);
}

.similar-arrow-btn:hover svg {
  stroke: #ffffff !important;
}

/* Carousel Container */
.reader-similar-carousel {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
  padding: 8px 4px 16px;
  margin: 0 -4px;
  -webkit-overflow-scrolling: touch;
}

.reader-similar-carousel::-webkit-scrollbar {
  height: 6px;
}

.reader-similar-carousel::-webkit-scrollbar-track {
  background: transparent;
}

.reader-similar-carousel::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.4);
  border-radius: 999px;
}

.reader-similar-carousel::-webkit-scrollbar-thumb:hover {
  background: rgba(100, 116, 139, 0.7);
}

.similar-empty-msg {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 40px 16px;
  color: var(--edu-muted, #64748b);
  font-size: 13px;
  font-weight: 500;
  text-align: center;
}

/* StuDocu-Style Real Document Card */
.similar-card {
  flex: 0 0 215px;
  width: 215px;
  scroll-snap-align: start;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 14px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease, border-color 0.2s ease;
  user-select: none;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.similar-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px -4px rgba(0, 0, 0, 0.12), 0 0 0 1px rgba(225, 29, 72, 0.25);
  border-color: rgba(225, 29, 72, 0.45);
}

.dark .similar-card {
  background: #111827;
  border-color: rgba(255, 255, 255, 0.09);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
}

.dark .similar-card:hover {
  box-shadow: 0 12px 28px -6px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(225, 29, 72, 0.3);
  border-color: rgba(225, 29, 72, 0.45);
}

.similar-card.is-companion-highlight {
  border-color: #e11d48;
  box-shadow: 0 0 0 1px #e11d48, 0 4px 12px rgba(225, 29, 72, 0.15);
}

/* White A4 Sheet Preview (Real PDF Page 2) */
.similar-sheet {
  position: relative;
  width: 100%;
  height: 185px;
  background: #f8fafc;
  color: #0f172a;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  overflow: hidden;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 10px;
  text-decoration: none;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.03);
}

.dark .similar-sheet {
  background: #1e293b;
  color: #ffffff;
  border-color: #334155;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.2);
}

.similar-sheet canvas {
  max-height: 172px;
  max-width: 90%;
  display: block;
  background: #ffffff;
  border-radius: 3px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

.dark .similar-sheet canvas {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.similar-sheet .preview-placeholder {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 10px;
  font-weight: 600;
  color: #94a3b8;
  pointer-events: none;
}

/* NEW Sticker */
.similar-new-sticker {
  position: absolute;
  top: 8px;
  left: 8px;
  background: #e11d48;
  color: #ffffff;
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.05em;
  padding: 2px 6px;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  z-index: 5;
  box-shadow: 0 2px 6px rgba(225, 29, 72, 0.4);
}

/* PDF Preview Pill */
.similar-pdf-preview-pill {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(15, 23, 42, 0.9);
  color: #ffffff;
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
  font-size: 9.5px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  pointer-events: none;
  z-index: 5;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

/* Card Details */
.similar-card-details {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.similar-card-board {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 11px;
  font-weight: 800;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 3px;
}

.dark .similar-card-board {
  color: #94a3b8;
}

.similar-card-title {
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  font-size: 12.5px;
  font-weight: 700;
  line-height: 1.35;
  color: #0f172a;
  margin: 0 0 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  height: 34px;
  transition: color 0.15s ease;
}

.similar-card:hover .similar-card-title {
  color: #e11d48;
}

.dark .similar-card-title {
  color: #ffffff;
}

.dark .similar-card:hover .similar-card-title {
  color: #fb7185;
}

.similar-card-subject {
  font-size: 11.5px;
  font-weight: 500;
  color: #64748b;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 10px;
}

.dark .similar-card-subject {
  color: #94a3b8;
}

/* Card Action Buttons */
.similar-card-actions {
  display: flex;
  gap: 6px;
  margin-top: auto;
}

.similar-btn-practice {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  height: 30px;
  padding: 0 10px;
  background: #e11d48;
  color: #ffffff;
  border: 0;
  border-radius: 6px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 11.5px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s ease;
  box-shadow: 0 2px 6px rgba(225, 29, 72, 0.35);
  white-space: nowrap;
}

.similar-btn-practice:hover {
  background: #be123c;
  transform: translateY(-1px);
}

.similar-btn-dual {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  height: 30px;
  padding: 0 8px;
  background: #10b981;
  color: #ffffff;
  border: 0;
  border-radius: 6px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 11.5px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s ease;
  box-shadow: 0 2px 6px rgba(16, 185, 129, 0.35);
  white-space: nowrap;
}

.similar-btn-dual:hover {
  background: #059669;
  transform: translateY(-1px);
}

.similar-btn-preview {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  height: 30px;
  padding: 0 10px;
  background: #f8fafc;
  color: #0f172a;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 11.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.similar-btn-preview:hover {
  background: #e2e8f0;
  border-color: #94a3b8;
}

.dark .similar-btn-preview {
  background: #0f172a;
  color: #ffffff;
  border-color: #334155;
}

.dark .similar-btn-preview:hover {
  background: #1e293b;
  border-color: #475569;
}