/* ===== Tools Page Styles ===== */

/* --- Nav link active state --- */
.nav-link.active {
  color: #3b82f6;
  font-weight: 600;
}

/* --- Main Section --- */
.tools-main {
  padding: 0 0 80px;
  background: #f8fafc;
}

.tools-main-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ===== Tools Filter Tabs ===== */
.tools-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 13.5px;
  font-weight: 500;
  color: #64748b;
  background: #f1f5f9;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

.filter-btn:hover {
  background: #e2e8f0;
  color: #334155;
}

.filter-btn.active {
  background: #fff;
  color: #3b82f6;
  border-color: #3b82f6;
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.12);
}

.filter-count {
  font-size: 11px;
  font-weight: 700;
  background: rgba(0,0,0,0.06);
  padding: 1px 7px;
  border-radius: 10px;
}

.filter-btn.active .filter-count {
  background: rgba(59, 130, 246, 0.12);
  color: #3b82f6;
}

/* ===== Tools Layout (Sidebar + Content) ===== */
.tools-layout {
  display: flex;
  gap: 32px;
  align-items: flex-start;
}

.tools-sidebar {
  width: 200px;
  flex-shrink: 0;
  position: sticky;
  top: 80px;
  background: #fff;
  border-radius: 12px;
  padding: 16px 12px;
  border: 1px solid #e8ecf1;
}

.sidebar-title {
  font-size: 13px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid #e8ecf1;
  display: flex;
  align-items: center;
  gap: 6px;
}

.tools-sidebar .sidebar-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 13px;
  color: #64748b;
  transition: all 0.2s;
  text-decoration: none;
  margin-bottom: 2px;
}

.tools-sidebar .sidebar-link:hover {
  background: #f1f5f9;
  color: #334155;
}

.tools-sidebar .sidebar-link.active {
  background: #eff6ff;
  color: #3b82f6;
  font-weight: 600;
}

.tools-sidebar .sidebar-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.tools-sidebar .sidebar-count {
  margin-left: auto;
  font-size: 11px;
  color: #94a3b8;
  font-weight: 600;
}

.tools-content {
  flex: 1;
  min-width: 0;
}

/* ===== Category Sections ===== */
.category-anchor {
  scroll-margin-top: 64px;
}

.tools-grid-spaced {
  margin-bottom: 48px;
}

.tools-grid-spaced:last-child {
  margin-bottom: 0;
}

.category-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
  padding: 16px 0 16px;
  border-bottom: 2px solid #f1f5f9;
  position: sticky;
  top: 64px;
  background: #f8fafc;
  z-index: 10;
}

.category-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
  color: #fff;
}

.category-title {
  font-size: 20px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 2px;
}

.category-desc {
  font-size: 13px;
  color: #94a3b8;
}

/* ===== Tool Cards Grid ===== */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
}

.tool-card {
  background: #fff;
  border-radius: 12px;
  padding: 18px;
  border: 1px solid #e8ecf1;
  transition: all 0.25s;
  display: flex;
  flex-direction: column;
}

.tool-card:hover {
  border-color: #e2e8f0;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  transform: translateY(-2px);
}

.tool-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.tool-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
  overflow: hidden;
}

.tool-icon img {
  width: 26px;
  height: 26px;
  object-fit: contain;
}

.tool-meta {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.tool-name {
  font-size: 14.5px;
  font-weight: 650;
  color: #0f172a;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}



.tool-desc {
  font-size: 12.5px;
  color: #64748b;
  line-height: 1.7;
  flex: 1;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.tool-footer {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 12px;
  border-top: 1px solid #f8fafc;
}

.tool-stat {
  font-size: 11.5px;
  color: #94a3b8;
  white-space: nowrap;
}

.tool-link {
  margin-left: auto;
  font-size: 12px;
  font-weight: 600;
  color: #3b82f6;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s;
}

.tool-link:hover {
  color: #2563eb;
}

/* --- Mobile TOC (reuse from papers) --- */
.mobile-toc-fab{display:none;position:fixed;bottom:124px;right:18px;width:44px;height:44px;border-radius:14px;background:rgba(255,255,255,0.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(0,0,0,0.08);box-shadow:0 4px 20px rgba(0,0,0,0.1);align-items:center;justify-content:center;cursor:pointer;z-index:89;color:#f97316;transition:all .3s}
.mobile-toc-fab svg{width:20px;height:20px}
.mobile-toc-fab:active{transform:scale(.92)}
.mobile-toc-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.35);backdrop-filter:blur(4px);z-index:299;opacity:0;pointer-events:none;transition:opacity .3s}
.mobile-toc-overlay.active{opacity:1;pointer-events:auto}
.mobile-toc-panel{display:none;position:fixed;bottom:0;left:0;right:0;max-height:55vh;background:#fff;border-radius:20px 20px 0 0;box-shadow:0 -8px 40px rgba(0,0,0,0.12);z-index:300;transform:translateY(100%);pointer-events:none;transition:transform .35s cubic-bezier(.16,1,.3,1);overflow:hidden;flex-direction:column}
.mobile-toc-panel.active{transform:translateY(0);pointer-events:auto}
.mobile-toc-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px 12px;border-bottom:1px solid #f1f5f9}
.mobile-toc-title{font-size:15px;font-weight:700;color:#0f172a}
.mobile-toc-close{width:30px;height:30px;border-radius:8px;border:none;background:#f1f5f9;color:#64748b;display:flex;align-items:center;justify-content:center;cursor:pointer}
.mobile-toc-list{flex:1;overflow-y:auto;padding:8px 12px 24px;-webkit-overflow-scrolling:touch}
.mobile-toc-item{display:flex;align-items:center;gap:10px;padding:12px 14px;border-radius:10px;font-size:14px;font-weight:500;color:#475569;text-decoration:none;transition:all .2s}
.mobile-toc-item:active{background:#f1f5f9}
.mobile-toc-item.active{background:linear-gradient(135deg,#fff7ed,#fef3c7);color:#f97316;font-weight:600}
.mobile-toc-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}
.mobile-toc-count{margin-left:auto;font-size:11px;color:#94a3b8}

/* ===== Responsive ===== */
@media (max-width: 1100px) {
  .tools-sidebar {
    display: none;
  }
  .mobile-toc-fab, .mobile-toc-overlay, .mobile-toc-panel {
    display: flex;
  }
  .tools-layout {
    gap: 0;
  }
}

@media (max-width: 900px) {
  .tools-filter {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    gap: 6px;
    padding-bottom: 8px;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  .tools-filter::-webkit-scrollbar {
    display: none;
  }

  .filter-btn {
    font-size: 12px;
    padding: 8px 14px;
    white-space: nowrap;
    flex-shrink: 0;
  }
}

@media (max-width: 600px) {
  .tools-main-inner {
    padding: 0 16px;
  }

  .tools-grid {
    grid-template-columns: 1fr;
  }

  .category-title {
    font-size: 17px;
  }
}