/* ============ Free PDF Library section (Education page) ============ */
.edl-section {
  position: relative;
  background: hsl(var(--muted) / .5);
  border-top: 1px solid hsl(var(--foreground) / .08);
  padding: 72px 0 84px;
}
.edl-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 44px;
}
.edl-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: hsl(var(--secondary));
  background: hsl(var(--secondary) / .1);
  border: 1px solid hsl(var(--secondary) / .22);
  border-radius: 999px;
  padding: .4rem .85rem;
}
.edl-title-lg {
  margin: 18px 0 0;
  font-size: 2rem;
  line-height: 1.15;
  letter-spacing: -.03em;
  font-weight: 800;
  color: hsl(var(--foreground));
}
@media (min-width: 640px) { .edl-title-lg { font-size: 2.5rem; } }
.edl-subtitle {
  margin: 16px auto 0;
  color: hsl(var(--muted-foreground));
  font-size: 1rem;
  line-height: 1.65;
}

.edl-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) { .edl-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 960px) { .edl-grid { grid-template-columns: 1fr 1fr 1fr; } }

.edl-card {
  background: hsl(var(--card));
  border: 1px solid hsl(var(--card-border));
  border-radius: 1.1rem;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .25s, border-color .25s, box-shadow .25s;
  box-shadow: 0 1px 2px #242e420a;
}
.edl-card:hover {
  border-color: hsl(var(--secondary) / .45);
  transform: translateY(-3px);
  box-shadow: 0 16px 30px #2e426b1a;
}
.edl-thumb {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: hsl(var(--muted));
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: 1px solid hsl(var(--card-border));
}
.edl-thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.edl-thumb-fallback {
  color: hsl(var(--muted-foreground) / .5);
}
.edl-body {
  padding: 20px 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}
.edl-cat {
  align-self: flex-start;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: hsl(var(--secondary));
  background: hsl(var(--secondary) / .1);
  border-radius: 999px;
  padding: .25rem .65rem;
}
.edl-title {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -.01em;
  color: hsl(var(--foreground));
  margin: 2px 0 0;
}
.edl-desc {
  font-size: .88rem;
  line-height: 1.55;
  color: hsl(var(--muted-foreground));
  margin: 0;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.edl-dl-btn {
  margin-top: 10px;
  width: 100%;
  font-size: .88rem;
}

/* ============ Admin: PDF Library editor ============ */
.edl-admin-wrap { display: flex; flex-direction: column; gap: 28px; max-width: 760px; }
.edl-admin-block {
  background: hsl(var(--primary-foreground) / .04);
  border: 1px solid hsl(var(--primary-foreground) / .1);
  border-radius: 1rem;
  padding: 22px 24px;
}
.edl-admin-block h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: hsl(var(--primary-foreground));
  margin: 0;
}
.edl-admin-desc {
  font-size: .82rem;
  color: hsl(var(--primary-foreground) / .55);
  margin: 4px 0 16px;
}
.edl-admin-note {
  font-size: .78rem;
  color: hsl(var(--primary-foreground) / .5);
  margin: 12px 0 0;
  line-height: 1.5;
}
.edl-admin-grid { display: grid; gap: 14px; grid-template-columns: 1fr; }
.edl-admin-grid-2 { grid-template-columns: 1fr; }
@media (min-width: 640px) { .edl-admin-grid-2 { grid-template-columns: 1fr 1fr; } }
.edl-admin-field { display: flex; flex-direction: column; gap: 6px; }
.edl-admin-field label {
  font-size: .78rem;
  font-weight: 600;
  color: hsl(var(--primary-foreground) / .75);
}
.edl-admin-input, .edl-admin-textarea {
  background: hsl(var(--primary-foreground) / .06);
  border: 1px solid hsl(var(--primary-foreground) / .14);
  border-radius: .6rem;
  padding: .6rem .75rem;
  font-size: .88rem;
  color: hsl(var(--primary-foreground));
  width: 100%;
}
.edl-admin-input:focus, .edl-admin-textarea:focus {
  outline: none;
  border-color: hsl(var(--accent) / .6);
}
.edl-admin-textarea { min-height: 72px; resize: vertical; font-family: inherit; }

.edl-upload-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.edl-upload-btn { cursor: pointer; }
.edl-upload-status {
  font-size: .8rem;
  color: hsl(var(--primary-foreground) / .6);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.edl-draft-preview {
  margin-top: 10px;
  width: 84px;
  height: 84px;
  object-fit: cover;
  border-radius: .5rem;
  border: 1px solid hsl(var(--primary-foreground) / .14);
}

.edl-admin-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-top: 4px; }
.edl-admin-saved { display: inline-flex; align-items: center; gap: 6px; color: #6fe0a0; font-size: .85rem; font-weight: 600; }

.edl-admin-items { display: flex; flex-direction: column; gap: 10px; }
.edl-admin-empty { font-size: .85rem; color: hsl(var(--primary-foreground) / .5); }
.edl-admin-row {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: hsl(var(--primary-foreground) / .04);
  border: 1px solid hsl(var(--primary-foreground) / .1);
  border-radius: .75rem;
  padding: 12px 14px;
}
.edl-admin-thumb {
  width: 52px;
  height: 52px;
  border-radius: .5rem;
  object-fit: cover;
  flex-shrink: 0;
  background: hsl(var(--primary-foreground) / .08);
}
.edl-admin-thumb-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  color: hsl(var(--primary-foreground) / .35);
}
.edl-admin-thumb-empty svg { width: 20px; height: 20px; }
.edl-admin-row-body { flex: 1; min-width: 0; }
.edl-admin-row-body b { font-size: .92rem; color: hsl(var(--primary-foreground)); }
.edl-admin-row-body p {
  font-size: .8rem;
  color: hsl(var(--primary-foreground) / .55);
  margin: 3px 0 5px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.edl-admin-tag {
  font-size: .68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: hsl(var(--accent));
  background: hsl(var(--accent) / .12);
  border-radius: 999px;
  padding: .15rem .5rem;
}
.edl-admin-file {
  font-size: .74rem;
  color: hsl(var(--primary-foreground) / .45);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.edl-admin-row-actions { display: flex; gap: 6px; flex-shrink: 0; }
.edl-icon-btn {
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: .4rem;
  border: 1px solid hsl(var(--primary-foreground) / .14);
  background: transparent;
  color: hsl(var(--primary-foreground) / .7);
  cursor: pointer;
}
.edl-icon-btn:hover { background: hsl(var(--primary-foreground) / .08); }
.edl-icon-btn:disabled { opacity: .3; cursor: not-allowed; }
.edl-icon-btn-danger:hover { background: hsl(var(--destructive) / .2); color: hsl(var(--destructive)); }