/* ==========================================================================
   iDentist.Live — Blog & SEO Knowledge Base Stylesheet
   Glassmorphism UI, Responsive Typography, AI-Search Optimized Layout
   ========================================================================== */

:root {
  --primary-color: #00F2FE;
  --primary-gradient: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%);
  --accent-color: #10B981;
  --bg-dark: #0F172A;
  --bg-dark-card: rgba(30, 41, 59, 0.7);
  --border-dark: rgba(255, 255, 255, 0.08);
  --text-dark-main: #F8FAFC;
  --text-dark-muted: #94A3B8;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-dark);
  color: var(--text-dark-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header & Nav */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-dark);
  padding: 16px 0;
}

.nav-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: white;
  font-weight: 800;
  font-size: 1.25rem;
}

.brand-logo img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  object-fit: contain;
  background: rgba(15, 23, 42, 0.9);
  padding: 2px;
  border: 1.5px solid var(--primary-color);
  box-shadow: 0 0 14px rgba(0, 242, 254, 0.4);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.brand-logo:hover img {
  transform: scale(1.05);
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.7);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-links a {
  color: var(--text-dark-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  transition: color 0.2s;
}

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

.btn-launch {
  background: var(--primary-gradient);
  color: #041225 !important;
  padding: 8px 18px;
  border-radius: 10px;
  font-weight: 700 !important;
  box-shadow: 0 4px 14px rgba(0, 242, 254, 0.3);
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-launch:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 242, 254, 0.45);
}

/* Hero Section */
.hero-banner {
  padding: 60px 0 40px;
  text-align: center;
  background: radial-gradient(circle at top, rgba(0, 242, 254, 0.12) 0%, transparent 70%);
}

.hero-tag {
  display: inline-block;
  background: rgba(0, 242, 254, 0.1);
  color: var(--primary-color);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 700;
  border: 1px solid rgba(0, 242, 254, 0.25);
  margin-bottom: 16px;
}

.hero-banner h1 {
  font-size: 2.8rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  background: linear-gradient(180deg, #FFFFFF 0%, #CBD5E1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-banner p {
  font-size: 1.15rem;
  color: var(--text-dark-muted);
  max-width: 760px;
  margin: 0 auto 30px;
}

/* App Demonstration & Photo Gallery Showcase */
.demo-gallery-section {
  padding: 40px 0;
}

.gallery-title {
  text-align: center;
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 24px;
  color: #E2E8F0;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.gallery-card {
  background: var(--bg-dark-card);
  border: 1px solid var(--border-dark);
  border-radius: 16px;
  padding: 20px;
  transition: transform 0.25s, border-color 0.25s;
}

.gallery-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 242, 254, 0.3);
}

.gallery-icon {
  width: 48px;
  height: 48px;
  background: rgba(0, 242, 254, 0.12);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  font-size: 1.5rem;
  margin-bottom: 14px;
}

.gallery-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.gallery-card p {
  font-size: 0.9rem;
  color: var(--text-dark-muted);
}

/* Category Filter Pills */
.filter-pills {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 30px 0 40px;
}

.pill-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-dark);
  color: var(--text-dark-muted);
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.pill-btn:hover, .pill-btn.active {
  background: rgba(0, 242, 254, 0.18);
  color: var(--primary-color);
  border-color: var(--primary-color);
}

/* Article Cards Grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
  margin-bottom: 60px;
}

.article-card {
  background: var(--bg-dark-card);
  border: 1px solid var(--border-dark);
  border-radius: 18px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.25s, border-color 0.25s;
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 242, 254, 0.35);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--text-dark-muted);
  margin-bottom: 12px;
}

.badge-cat {
  background: rgba(16, 185, 129, 0.15);
  color: #10B981;
  padding: 3px 8px;
  border-radius: 6px;
  font-weight: 700;
}

.article-card h2 {
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 12px;
}

.article-card h2 a {
  color: var(--text-dark-main);
  text-decoration: none;
  transition: color 0.2s;
}

.article-card h2 a:hover {
  color: var(--primary-color);
}

.article-card p {
  font-size: 0.92rem;
  color: var(--text-dark-muted);
  margin-bottom: 20px;
}

.article-link {
  color: var(--primary-color);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-link:hover {
  text-decoration: underline;
}

/* Article Detail Page Layout */
.article-page {
  padding: 50px 0;
  max-width: 860px;
  margin: 0 auto;
}

.article-header {
  margin-bottom: 30px;
}

.article-header h1 {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 16px;
}

.article-content {
  font-size: 1.1rem;
  line-height: 1.8;
  color: #CBD5E1;
}

.article-content h2 {
  font-size: 1.6rem;
  color: #F8FAFC;
  margin: 40px 0 16px;
  border-bottom: 1px solid var(--border-dark);
  padding-bottom: 8px;
}

.article-content h3 {
  font-size: 1.25rem;
  color: #F8FAFC;
  margin: 24px 0 12px;
}

.article-content p {
  margin-bottom: 20px;
}

.article-content ul, .article-content ol {
  margin: 0 0 20px 24px;
}

.article-content li {
  margin-bottom: 8px;
}

/* SEO Comparison Table */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: 30px 0;
  background: var(--bg-dark-card);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-dark);
}

.comparison-table th, .comparison-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-dark);
  font-size: 0.95rem;
}

.comparison-table th {
  background: rgba(0, 242, 254, 0.1);
  color: var(--primary-color);
  font-weight: 700;
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

/* CTA Banner Box */
.cta-banner {
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.12) 0%, rgba(16, 185, 129, 0.12) 100%);
  border: 1px solid rgba(0, 242, 254, 0.3);
  border-radius: 20px;
  padding: 36px;
  text-align: center;
  margin: 50px 0;
}

.cta-banner h3 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.cta-banner p {
  font-size: 1rem;
  color: var(--text-dark-muted);
  max-width: 600px;
  margin: 0 auto 24px;
}

/* Footer */
footer.site-footer {
  border-top: 1px solid var(--border-dark);
  padding: 40px 0;
  text-align: center;
  color: var(--text-dark-muted);
  font-size: 0.9rem;
}

/* Hero Image & Content Photography Styles */
.article-hero-image {
  width: 100%;
  margin: 24px 0 35px;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--border-dark);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
  background: var(--bg-dark-card);
}

.article-hero-image img {
  width: 100%;
  max-height: 420px;
  object-fit: cover;
  display: block;
}

.image-caption {
  padding: 10px 16px;
  font-size: 0.85rem;
  color: var(--text-dark-muted);
  text-align: center;
  background: rgba(15, 23, 42, 0.7);
  border-top: 1px solid var(--border-dark);
}

/* Inline Photography Card */
.content-photo-card {
  margin: 30px 0;
  border-radius: 16px;
  overflow: hidden;
  background: var(--bg-dark-card);
  border: 1px solid var(--border-dark);
}

.content-photo-card img {
  width: 100%;
  max-height: 320px;
  object-fit: cover;
  display: block;
}

.photo-card-body {
  padding: 16px 20px;
}

.photo-card-body h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 6px;
}

.photo-card-body p {
  font-size: 0.92rem;
  color: var(--text-dark-muted);
  margin: 0;
}

/* Key Takeaways Box */
.takeaways-box {
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.08) 0%, rgba(30, 41, 59, 0.8) 100%);
  border: 1px solid rgba(0, 242, 254, 0.25);
  border-radius: 16px;
  padding: 24px;
  margin: 30px 0;
}

.takeaways-box h4 {
  color: var(--primary-color);
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.takeaways-box ul {
  margin: 0 0 0 20px;
  color: #E2E8F0;
  font-size: 0.98rem;
}

.takeaways-box li {
  margin-bottom: 8px;
}

/* Human Author Bio Box */
.author-bio-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--bg-dark-card);
  border: 1px solid var(--border-dark);
  border-radius: 16px;
  padding: 24px;
  margin: 50px 0 30px;
}

.author-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary-color);
  flex-shrink: 0;
}

.author-info h4 {
  font-size: 1.15rem;
  font-weight: 800;
  color: #F8FAFC;
  margin-bottom: 4px;
}

.author-title {
  font-size: 0.85rem;
  color: var(--primary-color);
  font-weight: 700;
  margin-bottom: 8px;
}

.author-bio {
  font-size: 0.9rem;
  color: var(--text-dark-muted);
  line-height: 1.5;
  margin: 0;
}

.verification-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(16, 185, 129, 0.15);
  color: #10B981;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 700;
  margin-top: 10px;
}

/* Copy-Proof & Image / Text Protection */
body, .article-page, .article-content, img, svg {
  -webkit-user-select: none !important;
  -moz-user-select: none !important;
  -ms-user-select: none !important;
  user-select: none !important;
  -webkit-user-drag: none !important;
  -khtml-user-drag: none !important;
  -moz-user-drag: none !important;
  -o-user-drag: none !important;
  user-drag: none !important;
}

/* Breadcrumb Root Navigation Bar */
.breadcrumb-trail {
  background: rgba(15, 23, 42, 0.95);
  border-bottom: 1px solid var(--border-dark);
  padding: 10px 0;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  font-size: 0.88rem;
  margin: 0;
  padding: 0;
}

.breadcrumb-root-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 8px;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.2);
  transition: all 0.2s ease;
  pointer-events: auto !important;
  cursor: pointer !important;
}

.breadcrumb-root-link:hover {
  background: rgba(0, 242, 254, 0.25);
  color: #ffffff;
  border-color: var(--primary-color);
  box-shadow: 0 0 10px rgba(0, 242, 254, 0.3);
}

.breadcrumb-root-link.active {
  color: #F8FAFC;
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.15);
  max-width: 320px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.breadcrumb-sep {
  color: var(--text-dark-muted);
  font-weight: 800;
  font-size: 0.8rem;
  user-select: none;
}

a {
  pointer-events: auto !important;
}

/* Mobile Responsive Adjustments */
@media (max-width: 768px) {
  .hero-banner h1 {
    font-size: 2rem;
  }
  .article-header h1 {
    font-size: 1.8rem;
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .breadcrumb-root-link.active {
    max-width: 180px;
  }
}