/* ==========================================================================
   Scopetrics Design System
   Premium B2B Analytics Consultancy
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* Colors - Light Mode - Premium Deep Blue Palette */
  --color-primary: #0f172a;
  --color-primary-dark: #020617;
  --color-primary-light: #1e293b;
  --color-secondary: #0ea5e9;
  --color-accent: #6366f1;
  --color-success: #10b981;
  --color-highlight: #3b82f6;

  /* Neutrals - Refined Gray Scale */
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;
  --color-gray-900: #0f172a;
  --color-gray-950: #020617;

  /* Semantic */
  --color-text: var(--color-gray-900);
  --color-text-muted: var(--color-gray-600);
  --color-text-light: var(--color-gray-500);
  --color-bg: #ffffff;
  --color-bg-alt: var(--color-gray-50);
  --color-bg-elevated: #ffffff;
  --color-border: var(--color-gray-200);
  --color-border-light: var(--color-gray-100);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;

  /* Font Sizes (fluid) */
  --text-xs: clamp(0.75rem, 0.7rem + 0.15vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.2vw, 0.9375rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1.05rem + 0.35vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.5vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.3rem + 0.75vw, 1.875rem);
  --text-3xl: clamp(1.875rem, 1.5rem + 1.25vw, 2.5rem);
  --text-4xl: clamp(2.25rem, 1.75rem + 1.75vw, 3.25rem);
  --text-5xl: clamp(3rem, 2.25rem + 2.5vw, 4.5rem);

  /* Line Heights */
  --leading-tight: 1.2;
  --leading-snug: 1.35;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;

  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows - Refined Depth System */
  --shadow-sm: 0 1px 2px 0 rgb(15 23 42 / 0.04);
  --shadow-md: 0 4px 6px -1px rgb(15 23 42 / 0.08), 0 2px 4px -2px rgb(15 23 42 / 0.04);
  --shadow-lg: 0 10px 25px -3px rgb(15 23 42 / 0.1), 0 4px 10px -4px rgb(15 23 42 / 0.06);
  --shadow-xl: 0 20px 40px -5px rgb(15 23 42 / 0.12), 0 8px 16px -6px rgb(15 23 42 / 0.08);
  --shadow-2xl: 0 30px 60px -12px rgb(15 23 42 / 0.2);
  --shadow-inner: inset 0 2px 4px 0 rgb(15 23 42 / 0.05);
  --shadow-glow: 0 0 40px -10px rgb(99 102 241 / 0.3);

  /* Transitions - Smooth & Professional */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Container */
  --container-max: 1280px;
  --container-narrow: 768px;
  --container-wide: 1440px;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
  :root {
    --color-text: var(--color-gray-100);
    --color-text-muted: var(--color-gray-400);
    --color-text-light: var(--color-gray-500);
    --color-bg: var(--color-gray-950);
    --color-bg-alt: var(--color-gray-900);
    --color-bg-elevated: var(--color-gray-800);
    --color-border: var(--color-gray-800);
    --color-border-light: var(--color-gray-900);
    --color-primary: #f8fafc;
    --color-primary-dark: #ffffff;
    --color-primary-light: #e2e8f0;
    --color-secondary: #38bdf8;
    --color-accent: #818cf8;
  }
}

/* Light mode override class */
.light-mode {
  --color-text: var(--color-gray-900);
  --color-text-muted: var(--color-gray-600);
  --color-text-light: var(--color-gray-500);
  --color-bg: #ffffff;
  --color-bg-alt: var(--color-gray-50);
  --color-bg-elevated: #ffffff;
  --color-border: var(--color-gray-200);
  --color-border-light: var(--color-gray-100);
  --color-primary: #1a56db;
  --color-primary-dark: #1e40af;
  --color-primary-light: #3b82f6;
}

/* Dark mode override class */
.dark-mode {
  --color-text: var(--color-gray-100);
  --color-text-muted: var(--color-gray-400);
  --color-text-light: var(--color-gray-500);
  --color-bg: var(--color-gray-950);
  --color-bg-alt: var(--color-gray-900);
  --color-bg-elevated: var(--color-gray-800);
  --color-border: var(--color-gray-800);
  --color-border-light: var(--color-gray-900);
  --color-primary: #3b82f6;
  --color-primary-dark: #60a5fa;
  --color-primary-light: #93c5fd;
}

/* Light mode theme toggle icons */
.light-mode .theme-toggle .icon-sun {
  display: none;
}

.light-mode .theme-toggle .icon-moon {
  display: block;
}

/* --------------------------------------------------------------------------
   Reset & Base Styles
   -------------------------------------------------------------------------- */
*, *::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-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --------------------------------------------------------------------------
   Typography - Professional & Refined
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  color: var(--color-gray-700);
  letter-spacing: -0.02em;
  margin-top: var(--space-2);
  margin-bottom: var(--space-4);
}

.dark-mode h1, .dark-mode h2, .dark-mode h3,
.dark-mode h4, .dark-mode h5, .dark-mode h6 {
  color: var(--color-gray-200);
}

h1 {
  font-size: var(--text-4xl);
  letter-spacing: -0.025em;
  font-weight: var(--font-bold);
  margin-bottom: var(--space-6);
}

h2 {
  font-size: var(--text-3xl);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-5);
}

h3 {
  font-size: var(--text-2xl);
  letter-spacing: -0.015em;
  margin-bottom: var(--space-4);
}

h4 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
}

h5 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}

h6 {
  font-size: var(--text-base);
  margin-bottom: var(--space-2);
}

p {
  margin-bottom: var(--space-4);
  color: var(--color-text-muted);
}

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

a:hover {
  color: var(--color-primary-dark);
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

strong {
  font-weight: var(--font-semibold);
  color: var(--color-text);
}

ul, ol {
  padding-left: var(--space-6);
  margin-bottom: var(--space-4);
}

li {
  margin-bottom: var(--space-2);
  color: var(--color-text-muted);
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background-color: var(--color-bg-alt);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

/* Code blocks with syntax highlighting */
pre {
  position: relative;
  margin: var(--space-6) 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

pre code {
  display: block;
  padding: var(--space-6);
  overflow-x: auto;
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
}

pre code.hljs {
  padding: var(--space-6);
}

/* Highlight.js copy button customization */
.hljs-copy-wrapper {
  position: relative;
}

.hljs-copy-button {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  width: 2.5rem;
  height: 2rem;
  border: 1px solid #d0d7de !important;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  background-color: #f6f8fa !important;
  background-repeat: no-repeat !important;
  background-position: center !important;
  background-size: 16px 16px !important;
  background-image: url('data:image/svg+xml;utf-8,<svg width="16" height="16" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg"><path fill-rule="evenodd" clip-rule="evenodd" d="M6 5C5.73478 5 5.48043 5.10536 5.29289 5.29289C5.10536 5.48043 5 5.73478 5 6V20C5 20.2652 5.10536 20.5196 5.29289 20.7071C5.48043 20.8946 5.73478 21 6 21H18C18.2652 21 18.5196 20.8946 18.7071 20.7071C18.8946 20.5196 19 20.2652 19 20V6C19 5.73478 18.8946 5.48043 18.7071 5.29289C18.5196 5.10536 18.2652 5 18 5H16C15.4477 5 15 4.55228 15 4C15 3.44772 15.4477 3 16 3H18C18.7956 3 19.5587 3.31607 20.1213 3.87868C20.6839 4.44129 21 5.20435 21 6V20C21 20.7957 20.6839 21.5587 20.1213 22.1213C19.5587 22.6839 18.7957 23 18 23H6C5.20435 23 4.44129 22.6839 3.87868 22.1213C3.31607 21.5587 3 20.7957 3 20V6C3 5.20435 3.31607 4.44129 3.87868 3.87868C4.44129 3.31607 5.20435 3 6 3H8C8.55228 3 9 3.44772 9 4C9 4.55228 8.55228 5 8 5H6Z" fill="%23374151"/><path fill-rule="evenodd" clip-rule="evenodd" d="M7 3C7 1.89543 7.89543 1 9 1H15C16.1046 1 17 1.89543 17 3V5C17 6.10457 16.1046 7 15 7H9C7.89543 7 7 6.10457 7 5V3ZM15 3H9V5H15V3Z" fill="%23374151"/></svg>') !important;
}

.hljs-copy-button:hover {
  background-color: #e9ecef !important;
  border-color: #b8bfc6 !important;
}

.hljs-copy-button[data-copied="true"] {
  background-color: #d1fae5 !important;
  border-color: #22c55e !important;
  color: #16a34a !important;
  background-size: 12px 12px !important;
  background-repeat: no-repeat !important;
  background-position: right 6px center !important;
  background-image: url('data:image/svg+xml;utf-8,<svg width="12" height="12" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M20 6L9 17L4 12" stroke="%2316a34a" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"/></svg>') !important;
  padding-left: 5px;
  padding-right: 22px !important;
}

/* Dark mode adjustments for code blocks */
.dark-mode pre code {
  background-color: #0d1117;
  border-color: #30363d;
}

.dark-mode .hljs-copy-button {
  background-color: #21262d !important;
  border-color: #444c56 !important;
  background-image: url('data:image/svg+xml;utf-8,<svg width="16" height="16" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg"><path fill-rule="evenodd" clip-rule="evenodd" d="M6 5C5.73478 5 5.48043 5.10536 5.29289 5.29289C5.10536 5.48043 5 5.73478 5 6V20C5 20.2652 5.10536 20.5196 5.29289 20.7071C5.48043 20.8946 5.73478 21 6 21H18C18.2652 21 18.5196 20.8946 18.7071 20.7071C18.8946 20.5196 19 20.2652 19 20V6C19 5.73478 18.8946 5.48043 18.7071 5.29289C18.5196 5.10536 18.2652 5 18 5H16C15.4477 5 15 4.55228 15 4C15 3.44772 15.4477 3 16 3H18C18.7956 3 19.5587 3.31607 20.1213 3.87868C20.6839 4.44129 21 5.20435 21 6V20C21 20.7957 20.6839 21.5587 20.1213 22.1213C19.5587 22.6839 18.7957 23 18 23H6C5.20435 23 4.44129 22.6839 3.87868 22.1213C3.31607 21.5587 3 20.7957 3 20V6C3 5.20435 3.31607 4.44129 3.87868 3.87868C4.44129 3.31607 5.20435 3 6 3H8C8.55228 3 9 3.44772 9 4C9 4.55228 8.55228 5 8 5H6Z" fill="%23c9d1d9"/><path fill-rule="evenodd" clip-rule="evenodd" d="M7 3C7 1.89543 7.89543 1 9 1H15C16.1046 1 17 1.89543 17 3V5C17 6.10457 16.1046 7 15 7H9C7.89543 7 7 6.10457 7 5V3ZM15 3H9V5H15V3Z" fill="%23c9d1d9"/></svg>') !important;
}

.dark-mode .hljs-copy-button:hover {
  background-color: #30363d !important;
  border-color: #6e7681 !important;
}

.dark-mode .hljs-copy-button[data-copied="true"] {
  background-color: #1b4721 !important;
  border-color: #3fb950 !important;
  color: #3fb950 !important;
  background-size: 12px 12px !important;
  background-repeat: no-repeat !important;
  background-position: right 6px center !important;
  background-image: url('data:image/svg+xml;utf-8,<svg width="12" height="12" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M20 6L9 17L4 12" stroke="%233fb950" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"/></svg>') !important;
  padding-right: 22px !important;
}

blockquote {
  border-left: 4px solid var(--color-primary);
  padding-left: var(--space-6);
  margin: var(--space-8) 0;
  font-size: var(--text-lg);
  font-style: italic;
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Layout Components
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-narrow {
  max-width: var(--container-narrow);
}

.container-wide {
  max-width: var(--container-wide);
}

.section {
  padding: var(--space-20) 0;
}

.section-sm {
  padding: var(--space-12) 0;
}

.section-lg {
  padding: var(--space-32) 0;
}

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

/* Grid System */
.grid {
  display: grid;
  gap: var(--space-8);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.grid-5 {
  grid-template-columns: repeat(5, 1fr);
}

@media (max-width: 1200px) {
  .grid-5 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 1024px) {
  .grid-5,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .grid-5,
  .grid-4,
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }
}

/* Flexbox Utilities */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }
.gap-12 { gap: var(--space-12); }

/* --------------------------------------------------------------------------
   Header & Navigation - Premium Styling
   -------------------------------------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(2, 6, 23, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(30, 41, 59, 0.6);
  transition: all var(--transition-base);
}

.header.scrolled {
  background-color: rgba(2, 6, 23, 0.98);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-md);
  border-bottom-color: transparent;
}

@media (prefers-color-scheme: dark) {
  .header {
    background-color: rgba(2, 6, 23, 0.8);
    border-bottom-color: rgba(30, 41, 59, 0.6);
  }
  .header.scrolled {
    background-color: rgba(2, 6, 23, 0.95);
  }
}

/* Header stays dark in all modes */
.light-mode .header,
.dark-mode .header {
  background-color: rgba(2, 6, 23, 0.95);
  border-bottom-color: rgba(30, 41, 59, 0.6);
}

.light-mode .header.scrolled,
.dark-mode .header.scrolled {
  background-color: rgba(2, 6, 23, 0.98);
}

/* Header text colors for dark header */
.light-mode .header .logo,
.light-mode .header .nav-link,
.light-mode .header .mobile-menu-btn {
  color: var(--color-gray-100);
}

.light-mode .header .nav-link {
  color: var(--color-gray-400);
}

.light-mode .header .nav-link:hover,
.light-mode .header .nav-link.active {
  color: white;
}

.light-mode .header .theme-toggle {
  color: var(--color-gray-400);
  border-color: var(--color-gray-700);
}

.light-mode .header .theme-toggle:hover {
  color: white;
  background-color: var(--color-gray-800);
  border-color: var(--color-gray-600);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  text-align: center;
}

.logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-1);
  font-weight: 700;
  font-size: var(--text-xl);
  color: white;
  letter-spacing: -0.02em;
  transition: opacity var(--transition-fast);
}

.logo:hover {
  opacity: 0.8;
  color: white;
}

.logo img {
  height: 36px;
  width: auto;
  margin-bottom: 2px;
}

.logo span.company-tagline {
  font-weight: 500;
  font-size: 9px;
  color: var(--color-gray-400);
  text-transform: uppercase;
  letter-spacing: 0.89em;
}

/* Header hide/show on scroll */
.header.header-hidden {
  transform: translateY(-100%);
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-gray-700);
  border-radius: var(--radius-lg);
  cursor: pointer;
  color: var(--color-gray-400);
  transition: all var(--transition-fast);
  margin-left: var(--space-2);
}

.theme-toggle:hover {
  background-color: var(--color-gray-800);
  color: white;
  border-color: var(--color-gray-600);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

.theme-toggle .icon-sun {
  display: none;
}

.theme-toggle .icon-moon {
  display: block;
}

.dark-mode .theme-toggle .icon-sun {
  display: block;
}

.dark-mode .theme-toggle .icon-moon {
  display: none;
}

/* Language Selector */
.lang-selector {
  position: relative;
  margin-left: var(--space-2);
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: transparent;
  border: 1px solid var(--color-gray-700);
  border-radius: var(--radius-lg);
  cursor: pointer;
  color: var(--color-gray-400);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  transition: all var(--transition-fast);
}

.lang-toggle:hover {
  background-color: var(--color-gray-800);
  color: white;
  border-color: var(--color-gray-600);
}

.lang-current {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  right: 0;
  min-width: 140px;
  background-color: var(--color-gray-900);
  border: 1px solid var(--color-gray-700);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
  z-index: 100;
}

.lang-selector:hover .lang-dropdown,
.lang-selector:focus-within .lang-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-option {
  display: block;
  padding: var(--space-3) var(--space-4);
  color: var(--color-gray-300);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
}

.lang-option:hover {
  background-color: var(--color-gray-800);
  color: white;
}

.lang-option.active {
  color: var(--color-secondary);
  font-weight: var(--font-medium);
}

.lang-option:first-child {
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.lang-option:last-child {
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.light-mode .lang-toggle {
  color: var(--color-gray-400);
  border-color: var(--color-gray-700);
}

.light-mode .lang-toggle:hover {
  color: white;
  background-color: var(--color-gray-800);
  border-color: var(--color-gray-600);
}

.light-mode .lang-dropdown {
  background-color: var(--color-gray-900);
  border-color: var(--color-gray-700);
}

.light-mode .lang-option {
  color: var(--color-gray-300);
}

.light-mode .lang-option:hover {
  background-color: var(--color-gray-800);
  color: white;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-gray-400);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: white;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-cta {
  margin-left: var(--space-4);
}

/* Mobile Navigation */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  color: white;
}

.mobile-menu-btn svg {
  width: 24px;
  height: 24px;
}

@media (max-width: 1024px) {
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-6);
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
  }

  .nav.open {
    display: flex;
  }

  .nav-link {
    padding: var(--space-3) 0;
    font-size: var(--text-base);
  }

  .nav-cta {
    margin-left: 0;
    margin-top: var(--space-4);
  }

  .mobile-menu-btn {
    display: block;
  }
}

/* --------------------------------------------------------------------------
   Buttons - Premium Design System
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.875rem 1.5rem;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1;
  text-align: center;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn-primary {
  background-color: var(--color-primary);
  color: white;
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  color: white;
  box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: var(--color-bg-alt);
  border-color: var(--color-gray-300);
  color: var(--color-text);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-secondary:active {
  transform: translateY(0);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-gray-700);
  font-weight: 500;
}

.btn-ghost:hover {
  background-color: var(--color-bg-alt);
  color: var(--color-text);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: var(--text-base);
  border-radius: var(--radius-xl);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn-icon {
  padding: var(--space-3);
}

/* --------------------------------------------------------------------------
   Cards - Elevated Design
   -------------------------------------------------------------------------- */
.card {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.03) 0%, rgba(14, 165, 233, 0.03) 100%);
}

.card:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card:hover::before {
  opacity: 1;
}

.card-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.card-link:hover {
  color: inherit;
}

.card-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: white;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-md);
}

.card-icon svg {
  width: 24px;
  height: 24px;
}

.card-icon img {
  background-color: white;
  border-radius: var(--radius-md);
  padding: 6px;
}

.card-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-3);
  color: var(--color-gray-700);
}

.dark-mode .card-title {
  color: var(--color-gray-200);
}

.card-description {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: 0;
  line-height: var(--leading-relaxed);
}

.card-feature {
  text-align: center;
  padding: var(--space-10);
}

.card-feature .card-icon {
  margin: 0 auto var(--space-6);
}

/* --------------------------------------------------------------------------
   Hero Section - Premium Landing Experience
   -------------------------------------------------------------------------- */
.hero {
  padding: calc(80px + var(--space-24)) 0 var(--space-24);
  min-height: 90vh;
  display: flex;
  align-items: center;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
    linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(circle at 25% 25%, rgba(99, 102, 241, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 75% 75%, rgba(14, 165, 233, 0.03) 0%, transparent 50%);
  pointer-events: none;
}

.hero.has-bg {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero.has-bg::before {
  background: linear-gradient(to bottom, rgba(2, 6, 23, 0.6) 0%, rgba(2, 6, 23, 0.8) 100%);
}

.hero.has-bg .hero-label {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.2);
  color: white;
}

.hero.has-bg h1 {
  background: none;
  -webkit-text-fill-color: white;
  color: white;
}

.hero.has-bg .hero-subtitle {
  color: rgba(255, 255, 255, 0.9);
}

.hero.has-bg .btn-secondary {
  border-color: rgba(255, 255, 255, 0.4);
  color: white;
  background-color: rgba(255, 255, 255, 0.1);
}

.hero.has-bg .btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.6);
}

.hero-content {
  max-width: 800px;
  position: relative;
  z-index: 1;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-gray-600);
  margin-bottom: var(--space-8);
  padding: var(--space-2) var(--space-5);
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
}

.hero-label svg {
  color: var(--color-accent);
}

.hero h1 {
  margin-bottom: var(--space-8);
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-gray-700) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-muted);
  margin-bottom: var(--space-10);
  max-width: 620px;
  line-height: var(--leading-relaxed);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

@media (max-width: 640px) {
  .hero {
    min-height: auto;
    padding: calc(80px + var(--space-16)) 0 var(--space-16);
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }
}

/* --------------------------------------------------------------------------
   Logo Strip / Tool Proof
   -------------------------------------------------------------------------- */
.logo-strip {
  padding: var(--space-12) 0;
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
  background-color: var(--color-bg);
}

.logo-strip-label {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  text-align: center;
  margin-bottom: var(--space-8);
}

.logo-strip-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-10);
}

.logo-strip-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-muted);
  opacity: 0.7;
  transition: opacity var(--transition-fast);
}

.logo-strip-item:hover {
  opacity: 1;
}

.logo-strip-item svg,
.logo-strip-item img {
  height: 32px;
  width: auto;
}

.logo-strip-item img {
  background-color: white;
  border-radius: var(--radius-sm);
  padding: 4px;
}

/* --------------------------------------------------------------------------
   Section Headers - Refined Typography
   -------------------------------------------------------------------------- */
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--space-16);
}

.section-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-4);
  padding: var(--space-1) var(--space-3);
  background-color: rgba(99, 102, 241, 0.08);
  border-radius: var(--radius-sm);
}

.section-header h2 {
  margin-bottom: var(--space-5);
}

.section-header p {
  font-size: var(--text-lg);
  max-width: 600px;
  margin: 0 auto;
  line-height: var(--leading-relaxed);
}

.section-header-left {
  text-align: left;
  max-width: none;
  margin-bottom: var(--space-12);
}

.section-header-left .section-label {
  margin-left: 0;
}

/* --------------------------------------------------------------------------
   Process / Steps - Refined Flow
   -------------------------------------------------------------------------- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  position: relative;
}

.process-grid::before {
  content: '';
  position: absolute;
  top: 28px;
  left: 12.5%;
  right: 12.5%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-secondary) 100%);
  opacity: 0.2;
}

.process-step {
  text-align: center;
  position: relative;
}

.process-number {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: white;
  font-weight: var(--font-bold);
  font-size: var(--text-xl);
  border-radius: var(--radius-full);
  margin: 0 auto var(--space-6);
  position: relative;
  z-index: 1;
  box-shadow: var(--shadow-lg);
}

.process-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-3);
}

.process-description {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: 0;
  line-height: var(--leading-relaxed);
}

@media (max-width: 768px) {
  .process-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .process-grid::before {
    display: none;
  }
}

/* --------------------------------------------------------------------------
   Testimonials - Social Proof
   -------------------------------------------------------------------------- */
.testimonial {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  position: relative;
  transition: all var(--transition-base);
}

.testimonial::before {
  content: '"';
  position: absolute;
  top: var(--space-4);
  left: var(--space-6);
  font-size: 4rem;
  font-family: Georgia, serif;
  color: var(--color-border);
  line-height: 1;
  opacity: 0.5;
}

.testimonial:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-lg);
}

.testimonial-quote {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--color-text);
  margin-bottom: var(--space-6);
  position: relative;
  z-index: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.testimonial-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-bold);
  font-size: var(--text-sm);
  box-shadow: var(--shadow-sm);
}

.testimonial-name {
  font-weight: var(--font-semibold);
  color: var(--color-text);
}

.testimonial-role {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   CTA Band - Premium Call to Action
   -------------------------------------------------------------------------- */
.cta-band {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: white;
  padding: var(--space-20) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-band::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.2) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(14, 165, 233, 0.2) 0%, transparent 50%);
  pointer-events: none;
}

.cta-band > .container {
  position: relative;
  z-index: 1;
}

.cta-band h2 {
  color: white;
  margin-bottom: var(--space-4);
}

.cta-band p {
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--text-lg);
  margin-bottom: var(--space-10);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta-band .btn-primary {
  background-color: white;
  color: var(--color-primary);
  box-shadow: var(--shadow-lg);
}

.cta-band .btn-primary:hover {
  background-color: var(--color-gray-100);
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.cta-band .btn-secondary {
  border-color: rgba(255, 255, 255, 0.4);
  color: white;
  background-color: rgba(255, 255, 255, 0.1);
}

.cta-band .btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.6);
}

/* --------------------------------------------------------------------------
   Case Study Cards
   -------------------------------------------------------------------------- */
.case-study-card {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  overflow: hidden;
  background-color: var(--color-bg-elevated);
  transition: all var(--transition-base);
}

.case-study-card:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.case-study-image {
  aspect-ratio: 16/9;
  background-color: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-4xl);
  overflow: hidden;
}

.case-study-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.case-study-card:hover .case-study-image img {
  transform: scale(1.05);
}

/* Disclaimer notice - subtle version */
.disclaimer-subtle {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  text-align: center;
  margin-top: var(--space-12);
  font-style: italic;
}

.case-study-content {
  padding: var(--space-6);
}

.case-study-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.tag {
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  padding: var(--space-1) var(--space-3);
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
}

.tag-primary {
  background-color: var(--color-primary);
  color: white;
}

.case-study-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.case-study-excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.case-study-metrics {
  display: flex;
  gap: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-light);
}

.metric {
  text-align: left;
}

.metric-value {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
}

.metric-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Resource / Article Cards
   -------------------------------------------------------------------------- */
.resource-card {
  display: block;
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: all var(--transition-base);
  text-decoration: none;
}

.resource-card:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  color: inherit;
}

.resource-category {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
}

.resource-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-2);
  color: var(--color-text);
  line-height: var(--leading-snug);
}

.resource-excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  line-height: var(--leading-normal);
}

.resource-meta {
  font-size: var(--text-xs);
  color: var(--color-text-light);
}

/* --------------------------------------------------------------------------
   Architecture Diagrams
   -------------------------------------------------------------------------- */
.architecture-diagram {
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-bottom: var(--space-8);
}

.architecture-diagram svg {
  width: 100%;
  height: auto;
  max-height: 400px;
}

.architecture-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-4);
}

.architecture-description {
  font-size: var(--text-base);
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Forms
   -------------------------------------------------------------------------- */
.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-input.error,
.form-textarea.error,
.form-select.error {
  border-color: #ef4444;
}

.form-error {
  display: block;
  font-size: var(--text-xs);
  color: #ef4444;
  margin-top: var(--space-1);
  min-height: 1.2em;
}

.required {
  color: #ef4444;
}

.form-status {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
  font-weight: 500;
}

.form-status-success {
  background-color: #d1fae5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

.form-status-error {
  background-color: #fee2e2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

.dark-mode .form-status-success {
  background-color: #064e3b;
  color: #a7f3d0;
  border-color: #065f46;
}

.dark-mode .form-status-error {
  background-color: #7f1d1d;
  color: #fecaca;
  border-color: #991b1b;
}

.contact-form {
  margin-top: var(--space-8);
}

.contact-alternatives {
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border-light);
}

/* --------------------------------------------------------------------------
   Footer - Professional & Clean
   -------------------------------------------------------------------------- */
.footer {
  background-color: var(--color-gray-950);
  color: var(--color-gray-300);
  padding: var(--space-20) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-16);
}

.footer-brand p {
  color: var(--color-gray-400);
  margin-top: var(--space-5);
  max-width: 320px;
  line-height: var(--leading-relaxed);
  font-size: var(--text-sm);
}

.footer-title {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-gray-300);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-5);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: var(--space-3);
}

.footer-links a {
  color: var(--color-gray-400);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: white;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-gray-800);
  font-size: var(--text-sm);
  color: var(--color-gray-500);
}

.footer-bottom a {
  color: var(--color-gray-400);
  transition: color var(--transition-fast);
}

.footer-bottom a:hover {
  color: white;
}

.footer-logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-1);
  color: white;
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: -0.02em;
}

.footer-logo img {
  height: 36px;
  width: auto;
  margin-bottom: 5px;
}

.footer-logo span.company-tagline {
  font-weight: 500;
  font-size: 9px;
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.89em;
}

.footer-disclaimer {
  font-size: var(--text-xs);
  color: var(--color-gray-600);
  text-align: center;
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-gray-800);
  line-height: var(--leading-relaxed);
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }

  .footer-brand {
    grid-column: span 2;
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-brand {
    grid-column: span 1;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }
}

/* --------------------------------------------------------------------------
   Article / Long-form Content
   -------------------------------------------------------------------------- */
.article-header {
  padding: calc(72px + var(--space-16)) 0 var(--space-12);
  background-color: var(--color-bg-alt);
  position: relative;
  overflow: hidden;
}

.article-header.has-bg {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.article-header.has-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(2, 6, 23, 0.4) 0%, rgba(2, 6, 23, 0.6) 100%);
  z-index: 1;
}

.article-header.has-bg > .container,
.article-header.has-bg > .container-narrow {
  position: relative;
  z-index: 2;
}

.article-header.has-bg h1,
.article-header.has-bg .article-excerpt,
.article-header.has-bg .article-meta,
.article-header.has-bg .article-category {
  color: white;
}

.article-header.has-bg .article-excerpt {
  color: rgba(255, 255, 255, 0.85);
}

.article-header.has-bg .article-meta {
  color: rgba(255, 255, 255, 0.75);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.article-category {
  font-weight: var(--font-semibold);
  color: var(--color-primary);
}

.article-header h1 {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-6);
  color: var(--color-gray-700);
}

.dark-mode .article-header h1 {
  color: var(--color-gray-200);
}

.article-excerpt {
  font-size: var(--text-xl);
  color: var(--color-text-muted);
  max-width: 700px;
}

.article-content {
  padding: var(--space-16) 0;
}

.article-body {
  max-width: 720px;
  margin: 0 auto;
}

.article-body h2 {
  font-size: var(--text-3xl);
  margin-top: var(--space-12);
  margin-bottom: var(--space-6);
}

.article-body h3 {
  font-size: var(--text-2xl);
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
}

.article-body p {
  margin-bottom: var(--space-6);
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
}

.article-body ul,
.article-body ol {
  margin-bottom: var(--space-6);
}

.article-body li {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}

.article-body table {
  width: 100%;
  margin: var(--space-8) 0;
  border-collapse: collapse;
  font-size: var(--text-base);
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.article-body thead {
  background-color: var(--color-bg-alt);
}

.article-body th {
  padding: var(--space-4) var(--space-5);
  text-align: left;
  font-weight: 600;
  color: var(--color-text);
  border-bottom: 2px solid var(--color-border);
}

.article-body td {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
  vertical-align: top;
}

.article-body td strong {
  color: var(--color-text);
}

.article-body tbody tr:last-child td {
  border-bottom: none;
}

.article-body tbody tr:hover {
  background-color: var(--color-bg-alt);
}

.dark-mode .article-body table {
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

/* Responsive tables */
@media (max-width: 640px) {
  .article-body table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .article-body th,
  .article-body td {
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-sm);
  }
}

/* --------------------------------------------------------------------------
   Page Headers (Non-article pages)
   -------------------------------------------------------------------------- */
.page-header {
  padding: calc(72px + var(--space-16)) 0 var(--space-12);
  background-color: var(--color-bg-alt);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header.has-bg {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.page-header.has-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(2, 6, 23, 0.4) 0%, rgba(2, 6, 23, 0.6) 100%);
  z-index: 1;
}

.page-header.has-bg > .container {
  position: relative;
  z-index: 2;
}

.page-header.has-bg h1,
.page-header.has-bg p,
.page-header.has-bg .section-label {
  color: white;
}

.page-header.has-bg p {
  color: rgba(255, 255, 255, 0.85);
}

.page-header h1 {
  margin-bottom: var(--space-4);
}

.page-header p {
  font-size: var(--text-xl);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* --------------------------------------------------------------------------
   FAQ Accordion
   -------------------------------------------------------------------------- */
.faq-item {
  border-bottom: 1px solid var(--color-border-light);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-6) 0;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  text-align: left;
  color: var(--color-text);
}

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

.faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  transition: transform var(--transition-fast);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  display: none;
  padding-bottom: var(--space-6);
  color: var(--color-text-muted);
}

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

/* --------------------------------------------------------------------------
   Service Detail Sections
   -------------------------------------------------------------------------- */
.service-detail {
  padding: var(--space-12) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.service-detail:last-child {
  border-bottom: none;
}

.service-detail-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
}

.service-detail-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary);
  color: white;
  border-radius: var(--radius-lg);
  flex-shrink: 0;
}

.service-detail h3 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-2);
}

.service-detail > p {
  font-size: var(--text-lg);
  margin-bottom: var(--space-6);
}

.service-deliverables {
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

.service-deliverables h4 {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-4);
}

.service-deliverables ul {
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Utility Classes
   -------------------------------------------------------------------------- */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

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

.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mt-16 { margin-top: var(--space-16); }

.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }
.mb-16 { margin-bottom: var(--space-16); }

.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }
.py-8 { padding-top: var(--space-8); padding-bottom: var(--space-8); }

.hidden { display: none; }

.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;
}

/* Skip Link for Accessibility - visually hidden but accessible to screen readers */
.skip-link {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link:focus {
  position: fixed;
  top: var(--space-2);
  left: var(--space-2);
  width: auto;
  height: auto;
  padding: var(--space-2) var(--space-4);
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
  background: var(--color-primary);
  color: white;
  z-index: 10000;
  border-radius: var(--radius-sm);
}

/* --------------------------------------------------------------------------
   Modal / Popup
   -------------------------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.6);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 1;
  visibility: visible;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.modal-overlay[aria-hidden="true"] {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.modal-container {
  background-color: var(--color-bg);
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  width: auto;
  max-width: 95vw;
  max-height: 95vh;
  overflow: hidden;
  transform: scale(1);
  transition: transform 0.2s ease;
}

.modal-overlay[aria-hidden="true"] .modal-container {
  transform: scale(0.95);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
  margin: 0;
  font-size: var(--text-xl);
}

.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.modal-close:hover {
  background-color: var(--color-bg-alt);
  color: var(--color-text);
}

.modal-body {
  line-height: 0;
  font-size: 0;
}

.appointment-iframe {
  width: 420px;
  height: 680px;
  border: none;
  display: block;
  overflow: hidden;
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* IE/Edge */
}

.appointment-iframe::-webkit-scrollbar {
  display: none; /* Chrome/Safari */
}

@media (max-width: 640px) {
  .modal-container {
    max-height: 95vh;
    border-radius: var(--radius-md);
  }

  .modal-header {
    padding: var(--space-3) var(--space-4);
  }

  .modal-body {
    min-height: 400px;
  }

  .appointment-iframe {
    min-height: 400px;
  }
}

/* Print Styles */
@media print {
  .header,
  .footer,
  .cta-band {
    display: none;
  }

  body {
    font-size: 12pt;
    line-height: 1.5;
  }

  a {
    color: inherit;
    text-decoration: underline;
  }
}