/* ==========================================================================
   CHANDERAGARWAL.COM - EXECUTIVE DESIGN SYSTEM
   Optimized for 100/100 Core Web Vitals, Accessibility & Performance
   ========================================================================== */

:root {
  --color-primary: #0a192f;
  --color-secondary: #0f2b48;
  --color-accent: #0284c7;
  --color-accent-hover: #0369a1;
  --color-accent-light: #e0f2fe;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --color-card-bg: #ffffff;
  --color-bg: #f8fafc;
  --color-highlight: #f1f5f9;
  
  --font-serif: "Merriweather", Georgia, "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.08);
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --container-max: 1120px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Typography */
h1, h2, h3, h4 {
  color: var(--color-primary);
  font-weight: 800;
  line-height: 1.3;
}

h1 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 2.9rem);
  letter-spacing: -0.5px;
}

h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 1.25rem;
}

h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1.35rem;
  font-size: 1.06rem;
}

a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 600;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--color-accent-hover);
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 70px 0;
}

.section-alt {
  background-color: #ffffff;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

/* Header & Navigation */
.site-header {
  background: #ffffff;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 75px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: -0.3px;
}

.header-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--color-accent);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
  display: block;
  flex-shrink: 0;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.site-logo:hover .header-avatar {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.25);
}

.site-logo span {
  color: var(--color-accent);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.15s ease;
  padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
}

.nav-cta {
  background: var(--color-accent);
  color: #ffffff !important;
  padding: 8px 18px !important;
  border-radius: var(--radius-sm);
  text-decoration: none !important;
  border-bottom: none !important;
  transition: background 0.15s ease;
}

.nav-cta:hover {
  background: var(--color-accent-hover);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-primary);
}

/* Hero Section */
.hero {
  padding: 80px 0 60px;
  background: linear-gradient(180deg, #ffffff 0%, var(--color-bg) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 50px;
  align-items: center;
}

.hero-kicker {
  display: inline-block;
  background: var(--color-accent-light);
  color: var(--color-accent);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 18px;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 25px;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 25px;
}

.badge {
  background: #ffffff;
  border: 1px solid var(--color-border);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-primary);
}

.hero-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
  text-align: center;
}

.profile-avatar {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  margin: 0 auto 18px;
  overflow: hidden;
  border: 4px solid var(--color-accent-light);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
}

.profile-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero-card h3 {
  margin-bottom: 4px;
}

.hero-card p {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  margin-bottom: 16px;
}

/* AI Overview / GEO Quick Facts Box */
.ai-summary-box {
  background: #ffffff;
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 28px;
  margin: 35px 0 50px;
  box-shadow: var(--shadow-sm);
}

.ai-summary-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.ai-icon {
  background: var(--color-accent);
  color: #ffffff;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 900;
}

.ai-summary-title {
  font-size: 1.15rem;
  color: var(--color-primary);
  font-weight: 800;
}

.ai-facts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 15px;
}

.ai-fact-item {
  background: var(--color-highlight);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.94rem;
}

.ai-fact-item strong {
  display: block;
  font-size: 0.78rem;
  text-transform: uppercase;
  color: var(--color-text-muted);
  letter-spacing: 0.5px;
  margin-bottom: 3px;
}

/* Content Grid / Cards */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 30px;
}

.card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.card-num {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--color-accent);
  margin-bottom: 10px;
}

/* Timeline */
.timeline {
  position: relative;
  margin: 40px 0;
  padding-left: 30px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 5px;
  bottom: 5px;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  margin-bottom: 32px;
}

.timeline-dot {
  position: absolute;
  left: -30px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid #ffffff;
  box-shadow: 0 0 0 2px var(--color-accent);
}

.timeline-date {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 4px;
}

/* FAQ / AEO Accordion */
.faq-list {
  margin-top: 30px;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 20px 24px;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--color-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
}

.faq-question::after {
  content: "+";
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--color-accent);
  transition: transform 0.2s ease;
}

.faq-item.active .faq-question::after {
  content: "−";
}

.faq-answer {
  padding: 0 24px 20px;
  display: none;
  font-size: 1.02rem;
  color: var(--color-text);
  border-top: 1px solid #f1f5f9;
  margin-top: -5px;
  padding-top: 15px;
}

.faq-item.active .faq-answer {
  display: block;
}

/* Verified Directory Grid */
.directory-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 25px;
}

.directory-link {
  display: block;
  background: #ffffff;
  border: 1px solid var(--color-border);
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.directory-link:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.directory-category {
  display: block;
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--color-text-muted);
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.directory-title {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
}

/* Footer */
.site-footer {
  background: var(--color-primary);
  color: #94a3b8;
  padding: 60px 0 35px;
  font-size: 0.95rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 30px;
  padding-bottom: 40px;
  border-bottom: 1px solid #1e293b;
}

.footer-col {
  max-width: 360px;
}

.footer-col h4 {
  color: #ffffff;
  margin-bottom: 16px;
  font-size: 1.1rem;
}

.footer-col a {
  color: #cbd5e1;
  text-decoration: none;
}

.footer-col a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  padding-top: 25px;
  text-align: center;
  font-size: 0.85rem;
  color: #64748b;
}

/* Responsive */
@media (max-width: 840px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .hero-card {
    max-width: 380px;
    margin: 0 auto;
  }
  .nav-menu {
    display: none;
    position: absolute;
    top: 75px;
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    padding: 20px;
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--color-border);
  }
  .nav-menu.open {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
}