/* ============================================================
   InfoNest — Global Design System
   Version: 1.0.0
   ============================================================ */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;0,900;1,400;1,700&family=Inter:wght@300;400;500;600;700&display=swap');

/* ── Design Tokens ── */
:root {
  /* Primary Palette */
  --color-navy:        #0D1B2A;
  --color-navy-800:    #162032;
  --color-navy-700:    #1E2D42;
  --color-navy-600:    #243552;

  /* Teal Accent */
  --color-teal:        #14B8A6;
  --color-teal-light:  #2DD4BF;
  --color-teal-dark:   #0D9488;

  /* Warm Amber Highlight */
  --color-amber:       #F59E0B;
  --color-amber-light: #FCD34D;
  --color-amber-dark:  #D97706;

  /* Neutrals */
  --color-slate-50:    #F8FAFC;
  --color-slate-100:   #F1F5F9;
  --color-slate-200:   #E2E8F0;
  --color-slate-300:   #CBD5E1;
  --color-slate-400:   #94A3B8;
  --color-slate-500:   #64748B;
  --color-slate-600:   #475569;
  --color-slate-700:   #334155;
  --color-slate-800:   #1E293B;
  --color-slate-900:   #0F172A;

  /* Semantic Tokens — Light Mode */
  --bg-base:           var(--color-slate-50);
  --bg-surface:        #FFFFFF;
  --bg-surface-2:      var(--color-slate-100);
  --bg-nav:            var(--color-navy);
  --bg-footer:         var(--color-navy);
  --text-primary:      var(--color-slate-800);
  --text-secondary:    var(--color-slate-500);
  --text-muted:        var(--color-slate-400);
  --text-on-dark:      #FFFFFF;
  --text-on-dark-muted:#94A3B8;
  --border-color:      var(--color-slate-200);
  --border-color-hover:var(--color-slate-300);
  --accent-primary:    var(--color-teal);
  --accent-secondary:  var(--color-amber);
  --shadow-sm:         0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05);
  --shadow-md:         0 4px 12px rgba(0,0,0,.1),  0 2px 4px rgba(0,0,0,.06);
  --shadow-lg:         0 10px 32px rgba(0,0,0,.12), 0 4px 8px rgba(0,0,0,.08);

  /* Typography */
  --font-display:      'Playfair Display', Georgia, serif;
  --font-body:         'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Spacing Scale (8pt grid) */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  /* Layout */
  --container-xl:  1280px;
  --container-lg:  1024px;
  --container-md:  768px;
  --radius-sm:     4px;
  --radius-md:     8px;
  --radius-lg:     12px;
  --radius-xl:     16px;
  --radius-full:   9999px;

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;

  /* Nav height */
  --nav-height: 68px;
}

/* ── Dark Mode Tokens ── */
[data-theme="dark"] {
  --bg-base:           #0A1220;
  --bg-surface:        #111B2E;
  --bg-surface-2:      #162033;
  --bg-nav:            #080E1A;
  --bg-footer:         #080E1A;
  --text-primary:      #E2E8F0;
  --text-secondary:    #94A3B8;
  --text-muted:        #64748B;
  --border-color:      #1E293B;
  --border-color-hover:#243552;
  --shadow-sm:         0 1px 3px rgba(0,0,0,.3),  0 1px 2px rgba(0,0,0,.2);
  --shadow-md:         0 4px 12px rgba(0,0,0,.4),  0 2px 4px rgba(0,0,0,.25);
  --shadow-lg:         0 10px 32px rgba(0,0,0,.5), 0 4px 8px rgba(0,0,0,.3);
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background-color var(--transition-base), color var(--transition-base);
  padding-top: var(--nav-height);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--color-teal-dark); }

ul, ol { list-style: none; }

/* ── Container ── */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}
@media (max-width: 640px) {
  .container { padding-left: var(--space-4); padding-right: var(--space-4); }
}

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--text-primary);
  line-height: 1.2;
  letter-spacing: -0.02em;
}
h1 { font-size: clamp(2rem, 4.5vw, 3.25rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 3vw,  2.25rem); font-weight: 600; }
h3 { font-size: clamp(1.2rem, 2vw,  1.5rem);  font-weight: 600; }
h4 { font-size: 1.125rem; font-weight: 600; }
p  { margin-bottom: var(--space-4); }

.text-muted  { color: var(--text-secondary); }
.text-accent { color: var(--accent-primary); }

/* ── Navigation ── */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: var(--bg-nav);
  z-index: 1000;
  border-bottom: 1px solid rgba(255,255,255,.06);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--space-4);
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  flex-shrink: 0;
}
.nav-logo-text {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: -0.03em;
}
.nav-logo-text span { color: var(--color-teal); }
.nav-logo svg { width: 32px; height: 32px; }

/* Desktop menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex: 1;
  justify-content: center;
  flex-wrap: nowrap;
}
.nav-link {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-on-dark-muted);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.nav-link:hover,
.nav-link.active {
  color: var(--color-teal-light);
  background: rgba(20, 184, 166, 0.1);
}

/* Nav Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

/* Dark mode toggle */
.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255,255,255,.15);
  background: rgba(255,255,255,.07);
  color: #FFFFFF;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast), border-color var(--transition-fast);
  font-size: 1rem;
}
.theme-toggle:hover { background: rgba(255,255,255,.15); border-color: rgba(255,255,255,.3); }

/* Mobile hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-1);
}
.nav-hamburger span {
  display: block;
  height: 2px;
  background: #FFFFFF;
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile drawer */
.nav-drawer {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0; right: 0; bottom: 0;
  background: var(--bg-nav);
  z-index: 999;
  overflow-y: auto;
  padding: var(--space-6);
  flex-direction: column;
  gap: var(--space-2);
  transform: translateX(-100%);
  transition: transform var(--transition-base);
}
.nav-drawer.open { transform: translateX(0); }
.nav-drawer-link {
  display: block;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-on-dark-muted);
  padding: var(--space-4) var(--space-4);
  border-radius: var(--radius-md);
  text-decoration: none;
  border-bottom: 1px solid rgba(255,255,255,.05);
  transition: color var(--transition-fast), background var(--transition-fast);
}
.nav-drawer-link:hover { color: var(--color-teal-light); background: rgba(20,184,166,.1); }

@media (max-width: 1024px) {
  .nav-menu { display: none; }
  .nav-hamburger { display: flex; }
  .nav-drawer { display: flex; }
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition-fast);
  text-decoration: none;
  letter-spacing: 0.01em;
}
.btn-primary {
  background: var(--color-teal);
  color: #FFFFFF;
  border-color: var(--color-teal);
}
.btn-primary:hover {
  background: var(--color-teal-dark);
  border-color: var(--color-teal-dark);
  color: #FFFFFF;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(20,184,166,.3);
}
.btn-outline {
  background: transparent;
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}
.btn-outline:hover {
  background: var(--accent-primary);
  color: #FFFFFF;
  transform: translateY(-1px);
}
.btn-amber {
  background: var(--color-amber);
  color: var(--color-navy);
  border-color: var(--color-amber);
}
.btn-amber:hover {
  background: var(--color-amber-dark);
  border-color: var(--color-amber-dark);
  color: #FFFFFF;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(245,158,11,.35);
}
.btn-sm { padding: var(--space-2) var(--space-4); font-size: 0.8rem; }
.btn-lg { padding: var(--space-4) var(--space-8); font-size: 1rem; }

/* ── Cards ── */
.card {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-color-hover);
}

.card-img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.card-img-placeholder {
  width: 100%;
  aspect-ratio: 16/9;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  font-weight: 700;
  color: rgba(255,255,255,0.9);
  font-family: var(--font-display);
  letter-spacing: -0.02em;
}

.card-body {
  padding: var(--space-6);
}

.card-category {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-primary);
  margin-bottom: var(--space-3);
  padding: 3px 10px;
  background: rgba(20,184,166,.1);
  border-radius: var(--radius-full);
  border: 1px solid rgba(20,184,166,.2);
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.35;
  margin-bottom: var(--space-3);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-title a { color: inherit; text-decoration: none; transition: color var(--transition-fast); }
.card-title a:hover,
.card:hover .card-title a,
.card:hover .card-title { 
  color: var(--accent-primary) !important; 
}


.card-excerpt {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: var(--space-4);
}

.card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.78rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.card-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

/* ── Article Grid ── */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-6);
}
@media (max-width: 640px) {
  .article-grid { grid-template-columns: 1fr; gap: var(--space-4); }
}

/* ── Category Colors ── */
.cat-technology   { background: linear-gradient(135deg, #1a237e, #0277bd); }
.cat-ai           { background: linear-gradient(135deg, #1b0036, #7b1fa2); }
.cat-programming  { background: linear-gradient(135deg, #004d40, #00796b); }
.cat-finance      { background: linear-gradient(135deg, #1a237e, #283593); }
.cat-health       { background: linear-gradient(135deg, #b71c1c, #c62828); }
.cat-education    { background: linear-gradient(135deg, #e65100, #bf360c); }
.cat-career       { background: linear-gradient(135deg, #1565c0, #0d47a1); }
.cat-business     { background: linear-gradient(135deg, #33691e, #2e7d32); }
.cat-productivity { background: linear-gradient(135deg, #4a148c, #6a1b9a); }
.cat-travel       { background: linear-gradient(135deg, #006064, #00838f); }
.cat-lifestyle    { background: linear-gradient(135deg, #880e4f, #ad1457); }

/* Category badge colors */
.badge-technology   { color: #60a5fa; background: rgba(96,165,250,.1);  border-color: rgba(96,165,250,.2); }
.badge-ai           { color: #c084fc; background: rgba(192,132,252,.1); border-color: rgba(192,132,252,.2); }
.badge-programming  { color: #34d399; background: rgba(52,211,153,.1);  border-color: rgba(52,211,153,.2); }
.badge-finance      { color: #818cf8; background: rgba(129,140,248,.1); border-color: rgba(129,140,248,.2); }
.badge-health       { color: #f87171; background: rgba(248,113,113,.1); border-color: rgba(248,113,113,.2); }
.badge-education    { color: #fb923c; background: rgba(251,146,60,.1);  border-color: rgba(251,146,60,.2); }
.badge-career       { color: #38bdf8; background: rgba(56,189,248,.1);  border-color: rgba(56,189,248,.2); }
.badge-business     { color: #4ade80; background: rgba(74,222,128,.1);  border-color: rgba(74,222,128,.2); }
.badge-productivity { color: #a78bfa; background: rgba(167,139,250,.1); border-color: rgba(167,139,250,.2); }
.badge-travel       { color: #22d3ee; background: rgba(34,211,238,.1);  border-color: rgba(34,211,238,.2); }
.badge-lifestyle    { color: #f472b6; background: rgba(244,114,182,.1); border-color: rgba(244,114,182,.2); }

/* ── Section Styles ── */
.section { padding: var(--space-20) 0; }
.section-sm { padding: var(--space-12) 0; }
.section-lg { padding: var(--space-24) 0; }

.section-header {
  margin-bottom: var(--space-10);
}
.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-primary);
  margin-bottom: var(--space-3);
}
.section-label::before {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: var(--accent-primary);
  border-radius: 1px;
}
.section-title { margin-bottom: var(--space-4); }
.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
}

/* ── Hero ── */
.hero {
  background: var(--color-navy);
  position: relative;
  overflow: hidden;
  padding: var(--space-24) 0;
  min-height: 600px;
  display: flex;
  align-items: center;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(20,184,166,.18) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(245,158,11,.12) 0%, transparent 50%),
    radial-gradient(ellipse at 60% 80%, rgba(20,184,166,.1) 0%, transparent 40%);
}
.hero-content { position: relative; z-index: 1; }
.hero-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-teal);
  margin-bottom: var(--space-5);
  padding: 4px 14px;
  background: rgba(20,184,166,.1);
  border-radius: var(--radius-full);
  border: 1px solid rgba(20,184,166,.25);
}
.hero h1 {
  color: #FFFFFF;
  margin-bottom: var(--space-6);
  max-width: 700px;
}
.hero p {
  color: var(--text-on-dark-muted);
  font-size: 1.1rem;
  margin-bottom: var(--space-8);
  max-width: 560px;
}
.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* ── Category Grid ── */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: var(--space-4);
}
.category-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-4);
  gap: var(--space-3);
  color: #FFFFFF;
  font-weight: 600;
  font-size: 0.9rem;
  text-align: center;
  letter-spacing: 0.01em;
  transition: transform var(--transition-base), box-shadow var(--transition-base), filter var(--transition-base);
  min-height: 140px;
}
.category-card:hover {
  transform: translateY(-5px) scale(1.02);
  box-shadow: var(--shadow-lg);
  filter: brightness(1.1);
  color: #FFFFFF;
}
.category-icon {
  font-size: 2rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 54px; height: 54px;
  background: rgba(255,255,255,.15);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(4px);
}

/* ── Featured Article (Large Card) ── */
.featured-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  min-height: 360px;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.featured-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.featured-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.featured-card-img-placeholder {
  width: 100%;
  height: 100%;
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  font-weight: 900;
  color: rgba(255,255,255,0.85);
  font-family: var(--font-display);
}
.featured-card-body {
  padding: var(--space-10);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.featured-card-body .card-title {
  font-size: 1.6rem;
  -webkit-line-clamp: 3;
  margin-bottom: var(--space-4);
}
.featured-card-body .card-excerpt {
  -webkit-line-clamp: 4;
  font-size: 0.95rem;
}
@media (max-width: 768px) {
  .featured-card { grid-template-columns: 1fr; }
  .featured-card-img-placeholder,
  .featured-card-img { min-height: 220px; height: 220px; }
  .featured-card-body { padding: var(--space-6); }
  .featured-card-body .card-title { font-size: 1.3rem; }
}

/* ── Newsletter Section ── */
.newsletter-section {
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-700) 100%);
  border-radius: var(--radius-xl);
  padding: var(--space-12) var(--space-10);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.newsletter-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(20,184,166,.15) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 50%, rgba(245,158,11,.1)  0%, transparent 60%);
}
.newsletter-section > * { position: relative; }
.newsletter-section h2 { color: #FFFFFF; margin-bottom: var(--space-4); }
.newsletter-section p { color: var(--text-on-dark-muted); margin-bottom: var(--space-6); font-size: 1.05rem; }
.newsletter-form {
  display: flex;
  gap: var(--space-3);
  max-width: 480px;
  margin: 0 auto;
}
.newsletter-input {
  flex: 1;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,.2);
  background: rgba(255,255,255,.1);
  color: #FFFFFF;
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}
.newsletter-input::placeholder { color: rgba(255,255,255,.5); }
.newsletter-input:focus { border-color: var(--color-teal); background: rgba(255,255,255,.15); }
@media (max-width: 480px) {
  .newsletter-form { flex-direction: column; }
  .newsletter-section { padding: var(--space-10) var(--space-6); }
}

/* ── Ad Slot Containers ── */
/* NOTE: During the Google AdSense review phase, we hide empty ad slots so the site looks fully complete and clean without dashed placeholder boxes. 
   Once your account is approved, remove "display: none !important;" to display the ad units. */
.ad-slot {
  display: none !important;
  width: 100%;
  background: var(--bg-surface-2);
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 500;
}
.ad-slot-header  { min-height: 90px;  margin-bottom: var(--space-6); }
.ad-slot-footer  { min-height: 90px;  margin-top: var(--space-6); }
.ad-slot-sidebar { min-height: 250px; }
.ad-slot-inarticle { min-height: 250px; margin: var(--space-8) 0; }


/* ── Page Header ── */
.page-header {
  background: var(--color-navy);
  padding: var(--space-16) 0 var(--space-12);
  position: relative;
  overflow: hidden;
}
.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(20,184,166,.15) 0%, transparent 60%);
}
.page-header-content { position: relative; }
.page-header h1 { color: #FFFFFF; margin-bottom: var(--space-4); }
.page-header p { color: var(--text-on-dark-muted); font-size: 1.05rem; max-width: 600px; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.82rem;
  color: var(--text-on-dark-muted);
  margin-bottom: var(--space-4);
}
.breadcrumb a { color: var(--color-teal); text-decoration: none; }
.breadcrumb a:hover { color: var(--color-teal-light); }
.breadcrumb-sep { color: rgba(255,255,255,.3); }

/* ── Footer ── */
.site-footer {
  background: var(--bg-footer);
  color: var(--text-on-dark-muted);
  padding: var(--space-16) 0 var(--space-8);
  border-top: 1px solid rgba(255,255,255,.05);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-10);
  margin-bottom: var(--space-10);
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-8); }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}

.footer-brand .nav-logo-text { font-size: 1.5rem; margin-bottom: var(--space-4); display: block; }
.footer-tagline { font-size: 0.9rem; color: var(--text-on-dark-muted); margin-bottom: var(--space-5); line-height: 1.6; }

.footer-social {
  display: flex;
  gap: var(--space-3);
}
.social-link {
  width: 36px; height: 36px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,.12);
  color: var(--text-on-dark-muted);
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}
.social-link:hover { background: rgba(255,255,255,.1); color: #FFFFFF; border-color: rgba(255,255,255,.25); }

.footer-col-title {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,.7);
  margin-bottom: var(--space-5);
}
.footer-links { display: flex; flex-direction: column; gap: var(--space-3); }
.footer-link {
  font-size: 0.875rem;
  color: var(--text-on-dark-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.footer-link:hover { color: var(--color-teal-light); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255,255,255,.06);
  font-size: 0.82rem;
  color: rgba(255,255,255,.35);
  flex-wrap: wrap;
  gap: var(--space-4);
}
.footer-bottom-links {
  display: flex;
  gap: var(--space-5);
}
.footer-bottom-link {
  color: rgba(255,255,255,.35);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.footer-bottom-link:hover { color: rgba(255,255,255,.7); }

/* ── Utility Classes ── */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.text-center { text-align: center; }
.text-right  { text-align: right;  }
.mb-0  { margin-bottom: 0; }
.mb-2  { margin-bottom: var(--space-2); }
.mb-4  { margin-bottom: var(--space-4); }
.mb-6  { margin-bottom: var(--space-6); }
.mb-8  { margin-bottom: var(--space-8); }
.mb-10 { margin-bottom: var(--space-10); }
.mt-6  { margin-top: var(--space-6); }
.mt-8  { margin-top: var(--space-8); }
.mt-10 { margin-top: var(--space-10); }

.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

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

/* ── Divider ── */
.divider {
  height: 1px;
  background: var(--border-color);
  border: none;
  margin: var(--space-10) 0;
}

/* ── Page Prose ── */
.prose {
  max-width: 75ch;
  color: var(--text-primary);
  font-size: 1.05rem;
  line-height: 1.75;
}
.prose h2 { margin-top: var(--space-10); margin-bottom: var(--space-4); }
.prose h3 { margin-top: var(--space-8); margin-bottom: var(--space-3); }
.prose p  { margin-bottom: var(--space-5); }
.prose ul, .prose ol {
  padding-left: var(--space-6);
  margin-bottom: var(--space-5);
}
.prose li { margin-bottom: var(--space-2); }
.prose ul li { list-style: disc; }
.prose ol li { list-style: decimal; }
.prose strong { font-weight: 600; color: var(--text-primary); }
.prose a { color: var(--accent-primary); text-decoration: underline; text-underline-offset: 3px; }
.prose a:hover { color: var(--color-teal-dark); }
.prose blockquote {
  border-left: 4px solid var(--color-teal);
  padding-left: var(--space-6);
  margin: var(--space-6) 0;
  color: var(--text-secondary);
  font-style: italic;
}

/* ── Scroll to Top ── */
.scroll-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 44px; height: 44px;
  background: var(--color-teal);
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  box-shadow: 0 4px 16px rgba(20,184,166,.4);
  transition: all var(--transition-fast);
  opacity: 0;
  pointer-events: none;
  z-index: 500;
}
.scroll-top.visible { opacity: 1; pointer-events: auto; }
.scroll-top:hover { background: var(--color-teal-dark); transform: translateY(-2px); }

/* ── Reading Progress Bar ── */
.reading-progress {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-teal), var(--color-amber));
  width: 0%;
  z-index: 999;
  transition: width 0.1s linear;
}

/* ── Animations ── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.animate-fade-up { animation: fadeInUp 0.6s ease both; }
.animate-fade    { animation: fadeIn  0.6s ease both; }

[data-animate] { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
[data-animate].in-view { opacity: 1; transform: none; }

/* ── Category Landing Page ── */
.category-header {
  position: relative;
  min-height: 320px;
  display: flex;
  align-items: flex-end;
  padding: var(--space-12) 0;
  overflow: hidden;
}
.category-header::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(0,0,0,.75) 0%, rgba(0,0,0,.35) 60%, transparent 100%);
}
.category-header-content { position: relative; z-index: 1; }
.category-header h1 { color: #FFFFFF; }
.category-header p { color: rgba(255,255,255,.8); }
.category-header .section-label { color: rgba(255,255,255,.9); }
.category-header .section-label::before { background: rgba(255,255,255,.8); }

/* ── Tag / Chip ── */
.tag {
  display: inline-flex;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: all var(--transition-fast);
}

/* ── Info Box ── */
.info-box {
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin: var(--space-6) 0;
  border-left: 4px solid;
}
.info-box.teal  { background: rgba(20,184,166,.07);  border-color: var(--color-teal);  }
.info-box.amber { background: rgba(245,158,11,.07);  border-color: var(--color-amber); }
.info-box.red   { background: rgba(248,113,113,.07); border-color: #f87171; }

/* ── Table ── */
.table-wrap { overflow-x: auto; margin: var(--space-6) 0; }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { padding: var(--space-3) var(--space-4); text-align: left; border-bottom: 1px solid var(--border-color); }
th { font-weight: 600; background: var(--bg-surface-2); color: var(--text-primary); }
tr:hover { background: var(--bg-surface-2); }

/* ── Back to Top Focus ── */
:focus-visible { outline: 2px solid var(--color-teal); outline-offset: 3px; }

/* ── Responsive Grid Helpers ── */
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: var(--space-6); }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: var(--space-6); }
@media (max-width: 768px) {
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .grid-3 { grid-template-columns: 1fr; }
}

/* ── Testimonial / Quote Block ── */
.stat-block {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
}
.stat-block .stat-value {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent-primary);
  line-height: 1;
  margin-bottom: var(--space-2);
}
.stat-block .stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ── Author Bio Card (inline) ── */
.author-bio-card {
  display: flex;
  gap: var(--space-4);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  align-items: flex-start;
}
.author-avatar {
  width: 64px; height: 64px;
  border-radius: var(--radius-full);
  object-fit: cover;
  flex-shrink: 0;
}
.author-avatar-placeholder {
  width: 64px; height: 64px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-teal), var(--color-navy));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  font-weight: 700;
  font-size: 1.3rem;
  flex-shrink: 0;
}
.author-bio-info h4 { font-size: 1rem; margin-bottom: var(--space-1); }
.author-bio-info .author-role {
  font-size: 0.8rem;
  color: var(--accent-primary);
  font-weight: 600;
  margin-bottom: var(--space-2);
}
.author-bio-info p { font-size: 0.875rem; color: var(--text-secondary); margin-bottom: 0; }

/* ── Share buttons ── */
.share-buttons {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-fast);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  background: var(--bg-surface);
}
.share-btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-sm); color: var(--text-primary); border-color: var(--border-color-hover); }

/* ── Related Articles ── */
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
@media (max-width: 768px) { .related-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .related-grid { grid-template-columns: 1fr; } }

/* ── Table of Contents ── */
.toc {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-8);
}
.toc-title {
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.toc-list { display: flex; flex-direction: column; gap: var(--space-2); }
.toc-list a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  padding: 2px 0;
}
.toc-list a:hover { color: var(--accent-primary); }

/* ── Disclaimer Box ── */
.disclaimer-box {
  background: rgba(245,158,11,.08);
  border: 1px solid rgba(245,158,11,.25);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  margin: var(--space-6) 0;
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}
.disclaimer-box strong { color: var(--color-amber-dark); }

/* ── 404 Page ── */
.error-page {
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-16);
}
.error-code {
  font-family: var(--font-display);
  font-size: clamp(6rem, 20vw, 12rem);
  font-weight: 900;
  line-height: 1;
  color: var(--color-teal);
  opacity: 0.15;
  margin-bottom: var(--space-4);
  display: block;
}

/* ── Print ── */
@media print {
  .site-nav, .site-footer, .ad-slot, .scroll-top, .reading-progress { display: none !important; }
  body { padding-top: 0; }
}

/* ── Real AI Image Backgrounds ── */
.card-img-placeholder,
.featured-card-img-placeholder {
  font-size: 0 !important;
  color: transparent !important;
  background-size: cover !important;
  background-position: center !important;
  background-repeat: no-repeat !important;
}

.cat-technology   { background-image: url('/assets/images/tech_hero.png') !important; }
.cat-ai           { background-image: url('/assets/images/ai_hero.png') !important; }
.cat-programming  { background-image: url('/assets/images/prog_hero.png') !important; }
.cat-finance      { background-image: url('/assets/images/finance_hero.png') !important; }
.cat-health       { background-image: url('/assets/images/health_hero.png') !important; }
.cat-education    { background-image: url('/assets/images/edu_hero.png') !important; }
.cat-career       { background-image: url('/assets/images/career_hero.png') !important; }
.cat-business     { background-image: url('/assets/images/business_hero.png') !important; }
.cat-productivity { background-image: url('/assets/images/prod_hero.png') !important; }
.cat-travel       { background-image: url('/assets/images/travel_hero.png') !important; }
.cat-lifestyle    { background-image: url('/assets/images/lifestyle_hero.png') !important; }