/* ========================================
   COMPONENTS — Reusable UI Elements
   ======================================== */

/* --- Navbar --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  background: var(--color-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-glass-border);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}
.navbar.scrolled {
  box-shadow: var(--shadow-md);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: var(--space-lg);
}
.nav-logo {
  font-size: var(--text-lg);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text-primary);
  white-space: nowrap;
}
.nav-logo:hover { color: var(--color-accent); }
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}
.nav-link {
  padding: 0.4rem 0.85rem;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}
.nav-link:hover, .nav-link.active {
  color: var(--color-text-primary);
  background: var(--color-accent-muted);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}
.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}
.icon-btn:hover {
  color: var(--color-text-primary);
  background: var(--color-accent-muted);
}
.icon-btn svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.nav-hamburger { display: none; }

/* Mobile Nav */
@media (max-width: 768px) {
  .nav-hamburger { display: flex; }
  /* When menu is open, disable backdrop-filter on navbar so it doesn't
     create a containing block that constrains .nav-links's fixed positioning */
  .navbar.nav-open,
  .navbar:has(.nav-links.open) {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: var(--color-bg);
  }
  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    height: calc(100vh - 64px);
    flex-direction: column;
    background-color: var(--color-bg);
    padding: var(--space-xl);
    gap: var(--space-sm);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    z-index: var(--z-modal);
    border-top: 1px solid var(--color-border);
    overflow-y: auto;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-link {
    font-size: var(--text-lg);
    font-weight: 600;
    padding: 0.75rem 1rem;
    width: 100%;
    color: var(--color-text-primary);
    border-radius: var(--radius-md);
  }
  .nav-link:hover, .nav-link.active {
    background: var(--color-accent-muted);
    color: var(--color-accent);
  }
}

/* --- Card Base --- */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}
.card:hover {
  border-color: var(--color-border-hover);
  background: var(--color-bg-card-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.card-image {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}
.card-body {
  padding: var(--space-lg);
}

/* --- News Card --- */
.news-card .card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.news-card .card-title {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-sm);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.35;
}
.news-card .card-excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* --- Phone Card --- */
.phone-card {
  text-align: center;
}
.phone-card .card-image {
  aspect-ratio: 3/4;
  object-fit: contain;
  background: var(--color-bg-elevated);
  padding: var(--space-lg);
}
.phone-card .card-body { padding: var(--space-md) var(--space-lg) var(--space-lg); }
.phone-card .phone-name {
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: 4px;
}
.phone-card .phone-price {
  font-size: var(--text-sm);
  color: var(--color-accent);
  font-weight: 600;
  font-family: var(--font-mono);
}
.phone-card .phone-specs-mini {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
}
.phone-card .phone-specs-mini span {
  font-size: 0.6875rem;
  color: var(--color-text-muted);
  padding: 2px 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
}

/* --- Review Card --- */
.review-card .review-rating {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: var(--space-sm);
}
.review-card .star { color: var(--color-amber); font-size: var(--text-base); }
.review-card .star.empty { opacity: 0.25; }
.review-card .rating-num {
  font-size: var(--text-sm);
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--color-amber);
  margin-left: 4px;
}
.review-card .card-title {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-sm);
}
.review-card .verdict {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  font-style: italic;
}

/* --- Breadcrumbs --- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding: var(--space-md) 0;
  flex-wrap: wrap;
}
.breadcrumb a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb .sep { opacity: 0.3; }

/* --- Spec Table --- */
.spec-table { margin: var(--space-xl) 0; }
.spec-group { margin-bottom: var(--space-xl); }
.spec-group-title {
  font-size: var(--text-lg);
  font-weight: 700;
  padding-bottom: var(--space-sm);
  margin-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-accent-muted);
  color: var(--color-accent);
}
.spec-row {
  display: flex;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--color-border);
  gap: var(--space-md);
}
.spec-label {
  flex: 0 0 40%;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}
.spec-value {
  flex: 1;
  font-size: var(--text-sm);
  font-weight: 500;
  font-family: var(--font-mono);
}

/* --- Footer --- */
.footer {
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  padding: var(--space-3xl) 0 var(--space-xl);
  margin-top: var(--space-4xl);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-xl); }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer-col h4 {
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}
.footer-col p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}
.footer-col a {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  padding: 3px 0;
  transition: color var(--transition-fast);
}
.footer-col a:hover { color: var(--color-accent); }
.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-align: center;
}

/* --- Search Overlay --- */
.search-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 12vh;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}
.search-overlay.open {
  opacity: 1;
  visibility: visible;
}
.search-modal {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  width: 90%;
  max-width: 640px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transform: translateY(-20px) scale(0.97);
  transition: transform var(--transition-slow);
}
.search-overlay.open .search-modal {
  transform: translateY(0) scale(1);
}
.search-header {
  display: flex;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-border);
  gap: var(--space-md);
}
.search-icon-wrap { color: var(--color-text-muted); flex-shrink: 0; }
.search-icon-wrap svg { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 2; }
.search-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  font-size: var(--text-lg);
  color: var(--color-text-primary);
}
.search-input::placeholder { color: var(--color-text-muted); }
.search-close {
  font-size: var(--text-xs);
  padding: 3px 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
}
.search-results {
  max-height: 50vh;
  overflow-y: auto;
  padding: var(--space-md);
}
.search-result-group { margin-bottom: var(--space-md); }
.search-result-group h4 {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  padding: var(--space-sm) var(--space-sm);
}
.search-result-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-sm);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
  cursor: pointer;
}
.search-result-item:hover { background: var(--color-accent-muted); }
.search-result-item img {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  object-fit: cover;
}
.search-result-info { flex: 1; }
.search-result-info .result-title {
  font-size: var(--text-sm);
  font-weight: 600;
}
.search-result-info .result-sub {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.search-empty {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* --- Brand Card --- */
.brand-card {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-lg);
}
.brand-logo {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  object-fit: contain;
  background: var(--color-bg-elevated);
  padding: 8px;
}
.brand-info h3 { font-size: var(--text-lg); }
.brand-info p { font-size: var(--text-sm); color: var(--color-text-secondary); }

/* Page content offset for fixed navbar */
.page-content { padding-top: 80px; }

/* --- Article Layout --- */
.article-header {
  max-width: 800px;
  margin: 0 auto var(--space-2xl);
}
.article-header h1 {
  margin-bottom: var(--space-md);
}
.article-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  flex-wrap: wrap;
}
.article-hero-img {
  width: 100%;
  max-width: 900px;
  margin: 0 auto var(--space-2xl);
  border-radius: var(--radius-xl);
  aspect-ratio: 16/9;
  object-fit: cover;
}
.article-body {
  max-width: 740px;
  margin: 0 auto;
  font-size: var(--text-base);
  line-height: 1.8;
  color: var(--color-text-secondary);
}
.article-body h2 {
  color: var(--color-text-primary);
  margin: var(--space-2xl) 0 var(--space-md);
}
.article-body p { margin-bottom: var(--space-lg); }
.article-body img {
  border-radius: var(--radius-md);
  margin: var(--space-xl) 0;
}

/* --- Reading Progress Bar --- */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-purple));
  z-index: calc(var(--z-modal) + 1);
  transition: width 60ms linear;
  pointer-events: none;
  box-shadow: 0 0 8px rgba(99, 139, 255, 0.4);
}
.reading-progress::after {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  width: 80px;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--color-purple));
  opacity: 0.6;
  border-radius: 0 0 2px 0;
}

/* --- Back to Top Button --- */
.back-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-bg);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-sticky);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-lg);
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  transform: translateY(-3px);
  background: var(--color-text-primary);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}
.back-to-top svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}
@media (max-width: 768px) {
  .back-to-top {
    bottom: var(--space-lg);
    right: var(--space-md);
    width: 42px;
    height: 42px;
  }
  .back-to-top svg {
    width: 20px;
    height: 20px;
  }
}