/* ==========================================================================
   iLoveMarks - Components & UI Modules
   ========================================================================== */

/* ---------------- Header & Navbar ---------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: var(--bg-surface-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
  transition: all var(--transition-normal);
}

.site-header .nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--text-primary);
  text-decoration: none;
}

.brand-logo .logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.brand-logo-img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  object-fit: contain;
  display: block;
  filter: drop-shadow(0 4px 8px rgba(99, 102, 241, 0.25));
  transition: transform var(--transition-fast);
}

.brand-logo:hover .brand-logo-img {
  transform: scale(1.08) rotate(-3deg);
}

.brand-logo span span {
  color: var(--primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-item {
  position: relative;
}

.nav-link {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-secondary);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 0.35rem;
  transition: all var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Nav Dropdown */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 240px;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 0.5rem;
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  z-index: 110;
  animation: fadeInDown 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-item:hover .nav-dropdown {
  display: flex;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.85rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.dropdown-item:hover {
  background: var(--bg-subtle);
  color: var(--primary);
  transform: translateX(4px);
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
}

/* ---------------- Hero Section ---------------- */
.hero-section {
  padding: 4.5rem 0 3.5rem;
  text-align: center;
  position: relative;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  background: var(--primary-light);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-xs);
}

.hero-title {
  margin-bottom: 1.25rem;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}

.hero-subtitle {
  font-size: 1.15rem;
  max-width: 640px;
  margin: 0 auto 2.5rem;
  color: var(--text-secondary);
}

/* Hero Search Box */
.hero-search-wrapper {
  max-width: 680px;
  margin: 0 auto 2rem;
  position: relative;
}

.hero-search-bar {
  display: flex;
  align-items: center;
  background: var(--bg-surface);
  border: 2px solid var(--border-light);
  border-radius: var(--radius-full);
  padding: 0.5rem 0.65rem 0.5rem 1.4rem;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.hero-search-bar:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-light), var(--shadow-lg);
}

.hero-search-bar svg.search-icon {
  width: 22px;
  height: 22px;
  color: var(--text-muted);
  flex-shrink: 0;
  margin-right: 0.75rem;
}

.hero-search-bar input {
  flex: 1;
  border: none;
  background: transparent;
  font-family: var(--font-body);
  font-size: 1.05rem;
  color: var(--text-primary);
  outline: none;
}

.hero-search-bar input::placeholder {
  color: var(--text-muted);
}

.search-shortcut {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: var(--bg-subtle);
  border: 1px solid var(--border-light);
  color: var(--text-muted);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  margin-right: 0.5rem;
}

/* Quick Search Tags */
.quick-tags {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
}

.quick-tag-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.quick-tag {
  font-size: 0.82rem;
  padding: 0.3rem 0.8rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.quick-tag:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}

/* Quick Stats Bar */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.15rem;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ---------------- Category Filter Tabs ---------------- */
.category-filter-section {
  padding: 1.5rem 0 2.5rem;
}

.category-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 2rem;
}

.category-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.category-btn:hover {
  background: var(--bg-subtle);
  border-color: var(--primary);
  color: var(--primary);
}

.category-btn.active {
  background: var(--primary-gradient);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 12px var(--primary-glow);
}

/* ---------------- Tools Grid & Cards ---------------- */
.tools-section {
  padding-bottom: 4rem;
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.section-title {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.section-title span.eyebrow {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary);
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

.tool-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-xs);
  overflow: hidden;
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary-gradient);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.tool-card:hover {
  transform: translateY(-4px);
  border-color: rgba(99, 102, 241, 0.35);
  box-shadow: var(--shadow-md);
}

.tool-card:hover::before {
  opacity: 1;
}

.tool-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.tool-icon-wrapper {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.btn-bookmark {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.35rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.btn-bookmark:hover, .btn-bookmark.bookmarked {
  color: var(--accent-amber);
}

.tool-card-body {
  margin-bottom: 1.5rem;
}

.tool-card-title {
  font-size: 1.2rem;
  margin-bottom: 0.6rem;
}

.tool-card-title a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.tool-card-title a:hover {
  color: var(--primary);
}

.tool-card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.tool-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-light);
}

.tool-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--primary);
  text-decoration: none;
}

.tool-link-btn:hover {
  color: var(--primary-hover);
  transform: translateX(3px);
}

/* ---------------- Feature Callout Grid ---------------- */
.featured-hub-section {
  padding: 4rem 0;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 4rem;
}

.hub-matrix-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.hub-card {
  background: var(--bg-main);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.hub-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--primary);
  transform: translateY(-2px);
}

.hub-card-info h4 {
  font-size: 1.05rem;
  margin-bottom: 0.2rem;
  color: var(--text-primary);
}

.hub-card-info p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.hub-card-arrow {
  color: var(--primary);
  font-size: 1.25rem;
  transition: transform var(--transition-fast);
}

.hub-card:hover .hub-card-arrow {
  transform: translateX(4px);
}

/* ---------------- Formula & Guide Showcase ---------------- */
.guide-section {
  padding: 3rem 0 4.5rem;
}

.guide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.guide-box {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.formula-item {
  background: var(--bg-subtle);
  border-left: 3px solid var(--primary);
  padding: 0.9rem 1.2rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1rem 0;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--primary);
}

/* ---------------- FAQ Accordion ---------------- */
.faq-section {
  padding: 3rem 0 5rem;
}

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item.open {
  border-color: var(--primary);
}

.faq-question {
  width: 100%;
  background: transparent;
  border: none;
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  text-align: left;
}

.faq-icon {
  transition: transform var(--transition-normal);
  color: var(--text-muted);
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 0 1.5rem;
}

.faq-item.open .faq-answer {
  padding: 0 1.5rem 1.25rem;
  max-height: 300px;
}

/* ---------------- Footer ---------------- */
.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-light);
  padding: 4.5rem 0 2rem;
  margin-top: auto;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3.5rem;
}

.footer-brand p {
  margin-top: 1rem;
  font-size: 0.9rem;
  max-width: 320px;
}

.footer-heading {
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-links a {
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid var(--border-light);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Keyframe Animations */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}