/* ==========================================================================
   CZUFIN CONSULTING, LLC — MODERN PRODUCTION DESIGN SYSTEM
   High-Consequence Technical Leadership & Operational Excellence
   WCAG 2.1 AA Compliant • Mobile-First Responsive • Zero Horizontal Overflow
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens & Root Custom Properties
   -------------------------------------------------------------------------- */
:root {
  /* Brand Color Palette (Deep Nuclear & High-Tech Authority) */
  --color-primary-950: #040e1b;
  --color-primary-900: #07172c;
  --color-primary-850: #0a1f3a;
  --color-primary-800: #0b2545;  /* Core Brand Navy */
  --color-primary-700: #134074;
  --color-primary-600: #1d599f;
  --color-primary-500: #2b74c7;
  --color-primary-100: #e0edfb;
  --color-primary-50:  #f0f6fd;

  /* Accent Flame / Amber (Energy & Precision - Meets WCAG AA contrast) */
  --color-accent-700:  #92400e;
  --color-accent-600:  #b45309;  /* 4.8:1 text contrast on light */
  --color-accent-500:  #d97706;  /* Primary Interactive Amber */
  --color-accent-400:  #f59e0b;
  --color-accent-300:  #fbbf24;
  --color-accent-100:  #fef3c7;
  --color-accent-50:   #fffbeb;

  /* Neutral Surface & Slate Grayscale */
  --color-slate-900:   #0f172a;  /* Crisp dark text */
  --color-slate-800:   #1e293b;  /* Main body text */
  --color-slate-700:   #334155;
  --color-slate-600:   #475569;  /* Secondary text: 5.9:1 contrast */
  --color-slate-500:   #64748b;
  --color-slate-400:   #94a3b8;
  --color-slate-300:   #cbd5e1;
  --color-slate-200:   #e2e8f0;  /* Card & divider borders */
  --color-slate-100:   #f1f5f9;  /* Muted backgrounds */
  --color-slate-50:    #f8fafc;  /* Soft light background */
  --color-white:       #ffffff;

  /* Semantic Feedback Tokens */
  --color-success:     #059669;
  --color-success-bg:  #ecfdf5;
  --color-info:        #0284c7;
  --color-info-bg:     #f0f9ff;
  --color-warning:     #d97706;

  /* Fluid Typography Scale (using clamp for zero abrupt stepping) */
  --font-family-sans:  system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-family-mono:  ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --font-size-display: clamp(2.5rem, 5.5vw, 4rem);
  --font-size-h1:      clamp(2.15rem, 4.2vw, 3.25rem);
  --font-size-h2:      clamp(1.75rem, 3.2vw, 2.5rem);
  --font-size-h3:      clamp(1.25rem, 2.2vw, 1.75rem);
  --font-size-h4:      clamp(1.1rem, 1.8vw, 1.35rem);
  --font-size-body-lg: clamp(1.1rem, 1.4vw, 1.25rem);
  --font-size-body:    1.0625rem; /* 17px */
  --font-size-sm:      0.9375rem; /* 15px */
  --font-size-xs:      0.875rem;  /* 14px minimum standard */

  --line-height-tight: 1.15;
  --line-height-snug:  1.3;
  --line-height-base:  1.65;
  --line-height-loose: 1.8;

  /* Structural Dimensions & Layout */
  --container-max:     1240px;
  --container-pad:     clamp(1rem, 3.5vw, 2rem);
  --header-height:     76px;
  --radius-sm:         4px;
  --radius-md:         8px;
  --radius-lg:         12px;
  --radius-xl:         16px;
  --radius-full:       9999px;

  /* Elevation Shadows (resolving audit flat-card deficiency) */
  --shadow-xs:         0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-sm:         0 2px 4px 0 rgba(15, 23, 42, 0.06);
  --shadow-md:         0 4px 12px -2px rgba(15, 23, 42, 0.08), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
  --shadow-lg:         0 12px 24px -4px rgba(15, 23, 42, 0.12), 0 4px 10px -2px rgba(15, 23, 42, 0.06);
  --shadow-xl:         0 20px 32px -6px rgba(15, 23, 42, 0.16), 0 8px 16px -4px rgba(15, 23, 42, 0.08);

  /* Transitions */
  --transition-fast:   150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 350ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* --------------------------------------------------------------------------
   2. Modern Reset & Ergonomic Base Defaults
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 1.5rem);
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-body);
  line-height: var(--line-height-base);
  color: var(--color-slate-800);
  background-color: var(--color-slate-50);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: clip; /* Clip horizontal overflow without disabling sticky header */
}

/* Modern Typography Formatting */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-slate-900);
  font-weight: 700;
  line-height: var(--line-height-snug);
  letter-spacing: -0.015em;
  text-wrap: balance;
}

h1 { font-size: var(--font-size-h1); }
h2 { font-size: var(--font-size-h2); }
h3 { font-size: var(--font-size-h3); }
h4 { font-size: var(--font-size-h4); }

p {
  margin-block-end: 1rem;
  text-wrap: pretty;
}

p:last-child {
  margin-block-end: 0;
}

a {
  color: var(--color-primary-700);
  text-decoration: none;
  transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-600);
}

img, picture, svg, video {
  display: block;
  max-width: 100%;
  height: auto;
}

ul, ol {
  padding-inline-start: 1.25rem;
  margin-block-end: 1rem;
}

li {
  margin-block-end: 0.35rem;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

/* Visible accessible focus ring */
:focus-visible {
  outline: 3px solid var(--color-accent-500);
  outline-offset: 3px;
}

/* Skip to Content Accessibility Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--color-primary-900);
  color: var(--color-white);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  z-index: 9999;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 1rem;
}

/* --------------------------------------------------------------------------
   3. Core Container & Shared Layout Primitives
   -------------------------------------------------------------------------- */
.container {
  width: min(100% - (var(--container-pad) * 2), var(--container-max));
  margin-inline: auto;
}

.container-narrow {
  width: min(100% - (var(--container-pad) * 2), 920px);
  margin-inline: auto;
}

.section {
  padding-block: clamp(3.5rem, 6vw, 6rem);
  position: relative;
}

.section-alt {
  background-color: var(--color-white);
}

.section-dark {
  background-color: var(--color-primary-900);
  color: var(--color-primary-100);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: var(--color-white);
}

.section-dark p {
  color: var(--color-slate-300);
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin-inline: auto;
  margin-block-end: clamp(2.5rem, 4vw, 4rem);
}

.section-header.text-start {
  text-align: start;
  margin-inline: 0;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent-600);
  background-color: var(--color-accent-100);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  margin-block-end: 1rem;
}

.section-dark .section-eyebrow {
  color: var(--color-accent-300);
  background-color: rgba(217, 119, 6, 0.18);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.section-subtitle {
  font-size: var(--font-size-body-lg);
  color: var(--color-slate-600);
  line-height: var(--line-height-snug);
  margin-block-start: 0.75rem;
}

.section-dark .section-subtitle {
  color: var(--color-slate-300);
}

/* --------------------------------------------------------------------------
   4. Buttons, Badges, and Action Tokens (>= 48px Touch Targets)
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  padding: 0.75rem 1.625rem;
  min-height: 48px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: all var(--transition-normal);
  line-height: 1;
}

.btn-primary {
  background-color: var(--color-accent-500);
  color: var(--color-primary-950);
  border-color: var(--color-accent-500);
  box-shadow: 0 4px 12px rgba(217, 119, 6, 0.28);
}

.btn-primary:hover {
  background-color: var(--color-accent-400);
  border-color: var(--color-accent-400);
  color: var(--color-primary-950);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(217, 119, 6, 0.38);
}

.btn-navy {
  background-color: var(--color-primary-800);
  color: var(--color-white);
  border-color: var(--color-primary-800);
}

.btn-navy:hover {
  background-color: var(--color-primary-700);
  border-color: var(--color-primary-700);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline-white {
  background-color: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline-white:hover {
  background-color: rgba(255, 255, 255, 0.12);
  border-color: var(--color-white);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-outline-navy {
  background-color: transparent;
  color: var(--color-primary-800);
  border-color: var(--color-primary-800);
}

.btn-outline-navy:hover {
  background-color: var(--color-primary-800);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-sm {
  min-height: 40px;
  padding: 0.5rem 1.125rem;
  font-size: var(--font-size-xs);
}

.btn-icon {
  width: 1.125rem;
  height: 1.125rem;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.btn:hover .btn-icon {
  transform: translateX(3px);
}

/* --------------------------------------------------------------------------
   5. Sticky Header & Pinned Glassmorphic Navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  background-color: rgba(7, 23, 44, 0.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

/* The logo sits at the start of the header and is the home link */
.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.875rem;
  text-decoration: none;
  min-height: 48px;
  padding-block: 0.25rem;
  color: var(--color-white);
}

.brand-logo-img {
  width: 44px;
  height: 40px;
  object-fit: contain;
  flex-shrink: 0;
}

.brand-text-block {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-white);
  line-height: 1.2;
}

.brand-subtitle {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-accent-400);
  line-height: 1.2;
}

/* Primary Desktop Navigation Bar (Strictly NO separate Home item) */
.primary-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0.5rem 1rem;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-md);
  position: relative;
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.08);
}

.nav-link.active {
  color: var(--color-accent-400);
  background-color: rgba(245, 158, 11, 0.12);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 6px;
  left: 1rem;
  right: 1rem;
  height: 2px;
  background-color: var(--color-accent-400);
  border-radius: var(--radius-full);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Hamburger Toggle Button (Mobile) */
.mobile-nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  color: var(--color-white);
  cursor: pointer;
  padding: 0;
  z-index: 1010;
  transition: all var(--transition-fast);
}

.mobile-nav-toggle:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.hamburger-icon {
  width: 24px;
  height: 20px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hamburger-line {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-fast);
}

.mobile-nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.mobile-nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
}

.mobile-nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

/* Mobile Drawer Overlay */
.mobile-nav-drawer {
  display: none;
}

@media (max-width: 900px) {
  .primary-nav {
    display: none;
  }

  .mobile-nav-toggle {
    display: inline-flex;
  }

  .header-actions .btn {
    display: none;
  }

  .mobile-nav-drawer {
    display: block;
    position: fixed;
    top: var(--header-height);
    inset-inline-start: 0;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background-color: rgba(4, 14, 27, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 2rem var(--container-pad);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-smooth), opacity var(--transition-smooth), visibility var(--transition-smooth);
    overflow-y: auto;
    z-index: 999;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }

  .mobile-nav-drawer.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .mobile-nav-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    list-style: none;
    padding: 0;
    margin: 0 0 2rem 0;
  }

  .mobile-nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 52px;
    padding: 0.875rem 1.25rem;
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-white);
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.08);
  }

  .mobile-nav-link:hover,
  .mobile-nav-link.active {
    background-color: rgba(245, 158, 11, 0.18);
    border-color: rgba(245, 158, 11, 0.4);
    color: var(--color-accent-300);
  }

  .mobile-drawer-cta {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }

  .mobile-drawer-contact {
    margin-block-start: 2rem;
    padding-block-start: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--color-slate-300);
    font-size: var(--font-size-sm);
  }
}

/* --------------------------------------------------------------------------
   6. Hero Component (High-Impact Engineering Masthead)
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  background-color: var(--color-primary-950);
  color: var(--color-white);
  padding-block: clamp(4rem, 8vw, 7.5rem);
  overflow: hidden;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-bg-wrapper {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  opacity: 0.22;
  filter: contrast(1.1) brightness(0.8);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(4, 14, 27, 0.95) 0%,
    rgba(11, 37, 69, 0.88) 55%,
    rgba(7, 23, 44, 0.95) 100%
  );
}

.hero-container {
  position: relative;
  z-index: 1;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 4vw, 4rem);
  align-items: center;
}

@media (min-width: 992px) {
  .hero-grid {
    grid-template-columns: 1.25fr 0.95fr;
  }
}

.hero-content {
  max-width: 680px;
}

.hero-title {
  color: var(--color-white);
  font-size: var(--font-size-display);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.025em;
  margin-block-end: 1.5rem;
}

.hero-title .text-gradient {
  background: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline;
}

.hero-description {
  font-size: var(--font-size-body-lg);
  line-height: var(--line-height-base);
  color: var(--color-slate-200);
  margin-block-end: 2rem;
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-block-end: 2.5rem;
}

/* Quick Hero Highlights / Trust Indicators */
.hero-trust-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  padding-block-start: 1.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.hero-trust-item {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: var(--font-size-sm);
  color: var(--color-slate-300);
}

.hero-trust-icon {
  color: var(--color-accent-400);
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
}

/* Hero Visual Showcase Card (Right Column) */
.hero-card-preview {
  background: rgba(11, 37, 69, 0.65);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.hero-founder-badge {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-block-end: 1.5rem;
}

.hero-founder-avatar {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 2px solid var(--color-accent-400);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  flex-shrink: 0;
}

.hero-founder-info h3 {
  font-size: 1.25rem;
  color: var(--color-white);
  margin: 0;
}

.hero-founder-info p {
  font-size: var(--font-size-xs);
  color: var(--color-accent-300);
  margin: 0.15rem 0 0 0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.hero-metric-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-block-start: 1rem;
}

.hero-metric-box {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.hero-metric-num {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-accent-400);
  line-height: 1;
}

.hero-metric-label {
  font-size: var(--font-size-xs);
  color: var(--color-slate-300);
  margin-block-start: 0.4rem;
  line-height: 1.3;
}

/* --------------------------------------------------------------------------
   7. Authority & Industry Statistics Ribbon
   -------------------------------------------------------------------------- */
.stats-ribbon {
  background-color: var(--color-primary-900);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-block: 2.5rem;
  position: relative;
  z-index: 2;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}

@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat-item {
  text-align: center;
  padding: 0.5rem;
  border-inline-end: 1px solid rgba(255, 255, 255, 0.08);
}

.stat-item:last-child {
  border-inline-end: none;
}

@media (max-width: 767px) {
  .stat-item:nth-child(2) {
    border-inline-end: none;
  }
}

.stat-value {
  font-size: clamp(2rem, 3.8vw, 3rem);
  font-weight: 800;
  color: var(--color-accent-400);
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-white);
  margin-block-start: 0.5rem;
  text-wrap: balance;
}

.stat-desc {
  font-size: var(--font-size-xs);
  color: var(--color-slate-400);
  margin-block-start: 0.25rem;
}

/* --------------------------------------------------------------------------
   8. Four Pillars Consulting Services Grid
   -------------------------------------------------------------------------- */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 768px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.service-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-slate-200);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-fast);
  min-width: 0;
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(217, 119, 6, 0.4);
}

.service-img-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--color-primary-900);
}

.service-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-smooth);
}

.service-card:hover .service-img {
  transform: scale(1.05);
}

.service-pillar-tag {
  position: absolute;
  top: 1rem;
  inset-inline-start: 1rem;
  background-color: rgba(7, 23, 44, 0.88);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--color-accent-300);
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(245, 158, 11, 0.4);
}

.service-body {
  padding: clamp(1.5rem, 2.5vw, 2.25rem);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.service-title {
  font-size: 1.35rem;
  color: var(--color-slate-900);
  margin-block-end: 0.875rem;
  line-height: 1.25;
}

.service-text {
  color: var(--color-slate-600);
  font-size: var(--font-size-body);
  line-height: var(--line-height-base);
  margin-block-end: 1.5rem;
  flex-grow: 1;
}

.service-features-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1.75rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  font-size: var(--font-size-sm);
  color: var(--color-slate-700);
}

.service-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
}

.service-feature-icon {
  color: var(--color-accent-600);
  width: 1.125rem;
  height: 1.125rem;
  flex-shrink: 0;
  margin-block-start: 0.2rem;
}

.service-card-footer {
  padding-block-start: 1.25rem;
  border-top: 1px solid var(--color-slate-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* --------------------------------------------------------------------------
   9. Executive Biography & Authority Profile Section
   -------------------------------------------------------------------------- */
.bio-wrapper {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 4vw, 3.5rem);
  align-items: center;
}

@media (min-width: 992px) {
  .bio-wrapper {
    grid-template-columns: 0.85fr 1.15fr;
  }
}

.bio-card-visual {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  background-color: var(--color-primary-900);
  border: 1px solid var(--color-slate-200);
}

.bio-portrait {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  object-position: center top;
}

.bio-credentials-badge {
  position: absolute;
  bottom: 0;
  inset-inline: 0;
  background: linear-gradient(to top, rgba(7, 23, 44, 0.95) 0%, rgba(7, 23, 44, 0.7) 70%, transparent 100%);
  padding: 1.5rem;
  color: var(--color-white);
}

.bio-credentials-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-white);
}

.bio-credentials-sub {
  font-size: var(--font-size-xs);
  color: var(--color-accent-300);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.bio-content {
  min-width: 0;
}

.bio-lead {
  font-size: var(--font-size-body-lg);
  font-weight: 500;
  color: var(--color-primary-900);
  line-height: var(--line-height-base);
  margin-block-end: 1.25rem;
}

.bio-history-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  margin-block: 1.5rem;
}

.bio-pill {
  font-size: var(--font-size-xs);
  font-weight: 600;
  background-color: var(--color-primary-50);
  color: var(--color-primary-800);
  border: 1px solid var(--color-primary-100);
  padding: 0.4rem 0.875rem;
  border-radius: var(--radius-full);
}

/* --------------------------------------------------------------------------
   10. Client Utilities & Industry Reach Component
   -------------------------------------------------------------------------- */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

@media (min-width: 600px) {
  .clients-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 992px) {
  .clients-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.client-box {
  background: var(--color-white);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1rem;
  text-align: center;
  box-shadow: var(--shadow-xs);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 84px;
  transition: all var(--transition-fast);
}

.client-box:hover {
  border-color: var(--color-primary-600);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  background-color: var(--color-primary-50);
}

.client-name {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-slate-800);
  line-height: 1.25;
}

.client-sub {
  font-size: var(--font-size-xs);
  color: var(--color-slate-500);
  margin-block-start: 0.25rem;
}

/* --------------------------------------------------------------------------
   11. Featured Book Spotlight (*The Art of Effective Technical Leadership*)
   -------------------------------------------------------------------------- */
.book-spotlight {
  background: linear-gradient(135deg, var(--color-primary-950) 0%, var(--color-primary-850) 100%);
  color: var(--color-white);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: clamp(2rem, 4.5vw, 4rem);
  box-shadow: var(--shadow-xl);
}

.book-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 4vw, 3.5rem);
  align-items: center;
}

@media (min-width: 850px) {
  .book-grid {
    grid-template-columns: 300px 1fr;
  }
}

.book-cover-container {
  text-align: center;
}

.book-cover-img {
  width: 260px;
  max-width: 100%;
  aspect-ratio: 348 / 436;
  border-radius: var(--radius-md);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5), 0 5px 15px rgba(0, 0, 0, 0.3);
  margin-inline: auto;
  border: 1px solid rgba(255, 255, 255, 0.15);
  transition: transform var(--transition-normal);
}

.book-cover-img:hover {
  transform: scale(1.03) rotate(-1deg);
}

.book-asin-badge {
  display: inline-block;
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
  color: var(--color-accent-300);
  background-color: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  margin-block-start: 1rem;
}

.outcomes-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-block: 1.75rem;
}

@media (min-width: 600px) {
  .outcomes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.outcome-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.outcome-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-accent-400);
  margin-block-end: 0.35rem;
}

.outcome-desc {
  font-size: var(--font-size-xs);
  color: var(--color-slate-300);
  line-height: 1.45;
  margin: 0;
}

/* --------------------------------------------------------------------------
   12. Testimonials & Social Proof Grid
   -------------------------------------------------------------------------- */
.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1100px) {
  .testimonials-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.testimonial-card {
  background: var(--color-white);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

.quote-mark {
  color: var(--color-accent-400);
  font-size: 3rem;
  line-height: 1;
  font-family: Georgia, serif;
  height: 24px;
  margin-block-end: 0.75rem;
}

.testimonial-quote {
  font-size: var(--font-size-sm);
  line-height: 1.6;
  color: var(--color-slate-700);
  font-style: italic;
  flex-grow: 1;
  margin-block-end: 1.25rem;
}

.testimonial-author {
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--color-primary-800);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding-block-start: 0.75rem;
  border-top: 1px solid var(--color-slate-100);
}

/* --------------------------------------------------------------------------
   13. Interactive FAQ Accordion (AEO / Direct-Answer Engine Optimized)
   -------------------------------------------------------------------------- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 860px;
  margin-inline: auto;
}

.faq-item {
  background: var(--color-white);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--color-primary-600);
}

.faq-question-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  min-height: 52px;
  background: transparent;
  border: none;
  text-align: start;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-slate-900);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.faq-question-btn:hover {
  color: var(--color-primary-700);
}

.faq-icon {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
  color: var(--color-accent-600);
  transition: transform var(--transition-normal);
}

.faq-question-btn[aria-expanded="true"] .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 1.5rem 1.5rem 1.5rem;
  color: var(--color-slate-600);
  font-size: var(--font-size-body);
  line-height: var(--line-height-base);
}

/* --------------------------------------------------------------------------
   14. Forms & Accessible Inputs (WCAG 3.3.2 Compliant)
   -------------------------------------------------------------------------- */
.form-card {
  background: var(--color-white);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-xl);
  padding: clamp(1.75rem, 3.5vw, 3rem);
  box-shadow: var(--shadow-lg);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 650px) {
  .form-grid-2col {
    grid-template-columns: repeat(2, 1fr);
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-slate-800);
}

.form-label .required-indicator {
  color: #dc2626;
  margin-inline-start: 0.2rem;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  min-height: 48px;
  padding: 0.75rem 1rem;
  font-size: var(--font-size-body);
  color: var(--color-slate-800);
  background-color: var(--color-white);
  border: 1.5px solid var(--color-slate-300);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-textarea {
  min-height: 140px;
  resize: vertical;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-primary-700);
  box-shadow: 0 0 0 3px rgba(19, 64, 116, 0.15);
  outline: none;
}

.form-hint {
  font-size: var(--font-size-xs);
  color: var(--color-slate-500);
}

.form-alert {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  display: none;
  align-items: center;
  gap: 0.75rem;
  margin-block-end: 1.5rem;
}

.form-alert.is-visible {
  display: flex;
}

.form-alert-success {
  background-color: var(--color-success-bg);
  border: 1px solid #a7f3d0;
  color: #065f46;
}

.form-alert-error {
  background-color: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
}

/* --------------------------------------------------------------------------
   15. Multi-Column Comprehensive Global Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-primary-950);
  color: var(--color-slate-300);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-block-start: clamp(3.5rem, 6vw, 5rem);
  padding-block-end: 2rem;
  margin-block-start: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 3.5vw, 3.5rem);
  padding-block-end: clamp(2.5rem, 4vw, 3.5rem);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

@media (min-width: 600px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1.4fr 0.8fr 1fr 1fr;
  }
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.footer-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: -0.01em;
}

.footer-text {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
  color: var(--color-slate-400);
}

.footer-nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.footer-nav-link {
  font-size: var(--font-size-sm);
  color: var(--color-slate-300);
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.footer-nav-link:hover {
  color: var(--color-accent-400);
  transform: translateX(3px);
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: var(--font-size-sm);
  color: var(--color-slate-300);
  margin-block-end: 0.75rem;
}

.footer-contact-item a {
  color: var(--color-slate-300);
}

.footer-contact-item a:hover {
  color: var(--color-accent-400);
}

.footer-contact-icon {
  width: 1.125rem;
  height: 1.125rem;
  color: var(--color-accent-400);
  flex-shrink: 0;
  margin-block-start: 0.2rem;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block-start: 2rem;
  font-size: var(--font-size-xs);
  color: var(--color-slate-400);
}

.footer-social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-slate-300);
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-md);
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  min-height: 48px;
}

.footer-social-link:hover {
  background-color: rgba(255, 255, 255, 0.12);
  color: var(--color-accent-300);
}

/* --------------------------------------------------------------------------
   16. Ergonomic Back-to-Top Button (>= 48px Touch Target)
   -------------------------------------------------------------------------- */
.back-to-top {
  position: fixed;
  bottom: 1.75rem;
  inset-inline-end: 1.75rem;
  width: 50px;
  height: 50px;
  min-width: 48px;
  min-height: 48px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary-800);
  color: var(--color-white);
  border: 2px solid var(--color-accent-400);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 990;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity var(--transition-normal), visibility var(--transition-normal), transform var(--transition-normal), background-color var(--transition-fast);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: var(--color-accent-500);
  color: var(--color-primary-950);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(217, 119, 6, 0.45);
}

.back-to-top svg {
  width: 22px;
  height: 22px;
}

/* --------------------------------------------------------------------------
   17. Page-Specific Subcomponents (About Timeline, Resume CTA, Book)
   -------------------------------------------------------------------------- */
.timeline {
  position: relative;
  padding-inline-start: 2rem;
  margin-block: 2.5rem;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  inset-inline-start: 7px;
  width: 3px;
  background-color: var(--color-slate-200);
}

.timeline-item {
  position: relative;
  margin-block-end: 2.5rem;
}

.timeline-item:last-child {
  margin-block-end: 0;
}

.timeline-dot {
  position: absolute;
  inset-inline-start: -2rem;
  top: 4px;
  width: 17px;
  height: 17px;
  border-radius: var(--radius-full);
  background-color: var(--color-accent-500);
  border: 3px solid var(--color-white);
  box-shadow: 0 0 0 2px var(--color-primary-700);
}

.timeline-date {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--color-accent-700);
  background-color: var(--color-accent-100);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  margin-block-end: 0.4rem;
}

.timeline-role {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-slate-900);
  margin-block-end: 0.25rem;
}

.timeline-company {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary-700);
  margin-block-end: 0.75rem;
}

.timeline-desc {
  font-size: var(--font-size-sm);
  color: var(--color-slate-600);
  line-height: var(--line-height-base);
}

/* Callout Banner */
.callout-box {
  background: var(--color-primary-50);
  border-inline-start: 4px solid var(--color-primary-700);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.5rem;
  margin-block: 1.75rem;
}

.callout-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary-900);
  margin-block-end: 0.5rem;
}

/* Contact Page Layout Grid */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 4vw, 3.5rem);
  align-items: flex-start;
}

@media (min-width: 900px) {
  .contact-grid {
    grid-template-columns: 1fr 1.35fr;
  }
}

/* Print Styles */
@media print {
  .site-header,
  .mobile-nav-toggle,
  .back-to-top,
  .site-footer {
    display: none !important;
  }
  body {
    background: white;
    color: black;
  }
}