/* ==========================================================================
   Executive & Diplomatic Editorial Design System
   Targeting: Senior Public Policy Leaders, ITU Chairmen, Published Authors
   Palette: Presidential Navy (#0F2942), Warm Ivory (#FAF9F6), Royal Gold (#D97706)
   ========================================================================== */

:root {
  --bg-main: #faf9f6;
  --bg-card: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-navy-gradient: linear-gradient(135deg, #0f2942 0%, #1e3a5f 100%);
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --accent-navy: #0f2942;
  --accent-blue: #1d4ed8;
  --accent-gold: #d97706;
  --accent-gold-dark: #b45309;
  --accent-gold-bg: #fffbe6;
  --border-color: #cbd5e1;
  --border-gold: #fde68a;
  --border-focus: #1d4ed8;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-main: 0 12px 30px -8px rgba(15, 41, 66, 0.12), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-gold: 0 10px 25px -5px rgba(217, 119, 6, 0.2);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --transition-fast: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font-serif: 'Cinzel', 'Georgia', serif;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* Accessibility: Skip to Main Content Link */
.skip-link {
  position: absolute;
  top: -50px;
  left: 1rem;
  background: var(--accent-navy);
  color: #ffffff;
  padding: 10px 16px;
  z-index: 1000;
  font-weight: 800;
  text-decoration: none;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  box-shadow: var(--shadow-main);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
}

/* Performance Optimizations: Deferred Off-screen Section Rendering */
.section {
  content-visibility: auto;
  contain-intrinsic-size: 1px 600px;
}

/* Typography Defaults */
h1, h2, h3, h4 {
  color: var(--text-primary);
  font-weight: 700;
  letter-spacing: -0.01em;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 249, 246, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 2px solid var(--border-color);
  padding: 1.1rem 2.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.nav-brand-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--accent-navy);
}

.nav-brand-sub {
  font-size: 0.75rem;
  color: var(--accent-gold-dark);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
  padding: 0.25rem 0;
}

.nav-links a:hover, .nav-links a:focus {
  color: var(--accent-navy);
  border-bottom: 2px solid var(--accent-gold);
}

.lang-btn {
  background: #ffffff;
  border: 2px solid var(--border-color);
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--accent-navy);
  transition: all var(--transition-fast);
}

.lang-btn:hover {
  border-color: var(--accent-gold);
}

.linkedin-btn {
  background: #0a66c2 !important;
  color: #ffffff !important;
  padding: 0.45rem 1rem !important;
  border-radius: var(--radius-sm);
  font-weight: 700 !important;
  font-size: 0.85rem !important;
  box-shadow: 0 4px 10px rgba(10, 102, 194, 0.2);
}

.linkedin-btn:hover {
  background: #004182 !important;
}

/* Hero Section */
.hero {
  max-width: 1240px;
  margin: 3.5rem auto 4.5rem;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: 4rem;
  align-items: center;
}

.hero-image-wrapper {
  position: relative;
}

.hero-img {
  width: 100%;
  border-radius: var(--radius-lg);
  border: 4px solid var(--accent-navy);
  box-shadow: var(--shadow-main);
  object-fit: cover;
  aspect-ratio: 4/5;
}

.award-badge {
  position: absolute;
  bottom: -1.75rem;
  right: -1.25rem;
  background: #ffffff;
  border: 2px solid var(--accent-gold);
  border-radius: var(--radius-md);
  padding: 1.15rem 1.5rem;
  box-shadow: var(--shadow-gold);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.hero-content h1 {
  font-family: var(--font-serif);
  font-size: 3rem;
  line-height: 1.18;
  color: var(--accent-navy);
  margin-bottom: 1.15rem;
}

.hero-subtitle {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--accent-gold-dark);
  margin-bottom: 1.5rem;
  letter-spacing: 0.2px;
}

.hero-bio {
  font-size: 1.08rem;
  color: var(--text-secondary);
  margin-bottom: 2.25rem;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.95rem 2rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.98rem;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
}

.btn:focus {
  outline: 3px solid var(--accent-gold);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--accent-navy);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(15, 41, 66, 0.25);
}

.btn-primary:hover {
  background: #1e3a5f;
  transform: translateY(-2px);
}

.btn-outline {
  background: #ffffff;
  color: var(--accent-navy);
  border: 2px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-outline:hover {
  border-color: var(--accent-navy);
  color: var(--accent-navy);
  transform: translateY(-2px);
}

/* Section Shared */
.section {
  max-width: 1240px;
  margin: 5rem auto;
  padding: 0 2rem;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-tag {
  color: var(--accent-gold-dark);
  font-weight: 800;
  text-transform: uppercase;
  font-size: 0.88rem;
  letter-spacing: 1.2px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  color: var(--accent-navy);
  margin-top: 0.5rem;
}

/* Books Grid */
.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 3rem;
}

.book-card {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-main);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.book-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent-navy);
}

.book-cover-container {
  background: #f8fafc;
  padding: 2.5rem;
  display: flex;
  justify-content: center;
  align-items: center;
  border-bottom: 2px solid var(--border-color);
}

.book-cover-img {
  max-width: 230px;
  border-radius: var(--radius-sm);
  box-shadow: 0 20px 35px -10px rgba(15, 41, 66, 0.3);
}

.book-body {
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.edition-badge {
  background: var(--accent-gold-bg);
  color: var(--accent-gold-dark);
  border: 1px solid var(--border-gold);
  padding: 0.4rem 0.9rem;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 800;
  width: fit-content;
  margin-bottom: 1rem;
}

.book-category {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--accent-navy);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.book-title {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  margin: 0.4rem 0 0.8rem;
  color: var(--accent-navy);
}

.book-excerpt {
  color: var(--text-secondary);
  font-size: 0.98rem;
  margin-bottom: 1.75rem;
  flex-grow: 1;
  line-height: 1.65;
}

.book-actions {
  display: flex;
  gap: 0.85rem;
}

/* Spotlight Box */
.spotlight-box {
  background: #ffffff;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3.5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: center;
  box-shadow: var(--shadow-main);
}

.spotlight-box h3 {
  font-family: var(--font-serif);
  font-size: 2.15rem;
  margin-bottom: 1rem;
}

.spotlight-stats {
  display: flex;
  gap: 2.5rem;
  margin-top: 2.25rem;
}

.stat-item {
  border-left: 4px solid var(--accent-gold-dark);
  padding-left: 1.15rem;
}

.stat-number {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--accent-navy);
  display: block;
}

/* 3D Architectural Viewport */
.three-viewport {
  width: 100%;
  height: 500px;
  border-radius: var(--radius-lg);
  border: 3px solid var(--accent-navy);
  overflow: hidden;
  position: relative;
  background: #ffffff;
  box-shadow: var(--shadow-main);
}

/* Photo Scroll Container */
.geneva-scroll-container {
  display: flex;
  gap: 1.75rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 1rem 0.5rem 1.75rem 0.5rem;
  -webkit-overflow-scrolling: touch;
}

.geneva-scroll-container::-webkit-scrollbar {
  height: 10px;
}

.geneva-scroll-container::-webkit-scrollbar-track {
  background: #e2e8f0;
  border-radius: 10px;
}

.geneva-scroll-container::-webkit-scrollbar-thumb {
  background: var(--accent-navy);
  border-radius: 10px;
}

.geneva-photo-card {
  flex: 0 0 360px;
  scroll-snap-align: start;
  background: #ffffff;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-main);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.geneva-photo-card:hover, .geneva-photo-card:focus-within {
  transform: translateY(-5px);
  border-color: var(--accent-navy);
}

.geneva-photo-img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  display: block;
}

.geneva-photo-caption {
  padding: 1.25rem;
  background: #ffffff;
}

.geneva-photo-title {
  font-size: 0.98rem;
  font-weight: 800;
  color: var(--accent-navy);
  margin-bottom: 0.35rem;
}

.geneva-photo-sub {
  font-size: 0.85rem;
  color: var(--accent-gold-dark);
  font-weight: 700;
}

/* Timeline */
.timeline {
  position: relative;
  max-width: 920px;
  margin: 0 auto;
  padding-left: 2.25rem;
  border-left: 3px solid var(--accent-navy);
}

.timeline-item {
  margin-bottom: 2.75rem;
  position: relative;
}

.timeline-dot {
  position: absolute;
  left: -2.85rem;
  top: 0.25rem;
  width: 1.15rem;
  height: 1.15rem;
  border-radius: 50%;
  background: var(--accent-gold);
  border: 3px solid #ffffff;
  box-shadow: 0 0 0 2px var(--accent-navy);
}

.timeline-date {
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--accent-gold-dark);
  margin-bottom: 0.3rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.timeline-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: var(--accent-navy);
  margin-bottom: 0.5rem;
}

.timeline-desc {
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.65;
}

/* Contact Form */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--accent-navy);
  margin-bottom: 0.5rem;
}

.form-control {
  width: 100%;
  padding: 0.9rem 1.15rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.98rem;
  color: var(--text-primary);
  background: #ffffff;
  transition: border-color var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-navy);
  box-shadow: 0 0 0 3px rgba(15, 41, 66, 0.1);
}

/* Modals */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 41, 66, 0.65);
  backdrop-filter: blur(4px);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  padding: 1.5rem;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 2.75rem;
  max-width: 680px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  position: relative;
  border: 2px solid var(--accent-navy);
  box-shadow: var(--shadow-main);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  font-size: 2rem;
  border: none;
  background: none;
  cursor: pointer;
  color: var(--text-muted);
}

/* Submission inspector log */
.submission-log-box {
  margin-top: 1.5rem;
  background: var(--bg-main);
  border: 2px solid var(--border-color);
  padding: 1.15rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
}

/* Footer */
footer {
  background: var(--accent-navy);
  color: #ffffff;
  border-top: 4px solid var(--accent-gold);
  padding: 3.5rem 1.5rem;
  text-align: center;
  font-size: 0.95rem;
}

footer a {
  color: #93c5fd;
}

/* Responsive */
@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .spotlight-box {
    grid-template-columns: 1fr;
    padding: 2rem;
  }
  .navbar {
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
  }
  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }
}