/* ============================================================================
   NEXARSIL POLYSILICON TECHNOLOGY - COMPREHENSIVE CSS
   Professional B2B Industrial Technology Consulting Site
   ============================================================================ */

/* ============================================================================
   1. RESET & BASE STYLES
   ============================================================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--white);
  overflow-x: hidden;
}

/* ============================================================================
   2. CSS VARIABLES
   ============================================================================ */

:root {
  /* Color Scheme */
  --primary: #0f2b46;
  --primary-light: #1a4a72;
  --accent: #2d8cf0;
  --accent-hover: #1a6ed4;
  --text: #1a1a2e;
  --text-light: #5a6377;
  --bg-light: #f4f7fa;
  --bg-dark: #0b1d30;
  --white: #ffffff;
  --border: #e2e8f0;

  /* Additional useful colors */
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;

  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
}

/* ============================================================================
   3. TYPOGRAPHY
   ============================================================================ */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  color: var(--primary);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  letter-spacing: -0.5px;
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  letter-spacing: -0.3px;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2.125rem);
}

h4 {
  font-size: 1.5rem;
}

h5 {
  font-size: 1.25rem;
}

h6 {
  font-size: 1.125rem;
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text);
  line-height: 1.7;
}

p:last-child {
  margin-bottom: 0;
}

/* Lists */
ul,
ol {
  margin-bottom: var(--spacing-md);
  margin-left: 1.5rem;
}

li {
  margin-bottom: var(--spacing-sm);
}

/* Links */
a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
}

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

/* Code */
code,
pre {
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.875em;
  background-color: var(--bg-light);
  border-radius: var(--radius-md);
}

code {
  padding: 0.2em 0.4em;
  color: var(--primary);
}

pre {
  padding: var(--spacing-md);
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
}

pre code {
  background: none;
  padding: 0;
  color: inherit;
}

/* ============================================================================
   4. NAVIGATION
   ============================================================================ */

nav.main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: var(--white);
  border-bottom: 1px solid var(--border);
  transition: all var(--transition-base);
}

nav.main-nav.scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
  border-bottom-color: rgba(226, 232, 240, 0.5);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-sm) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-fast);
}

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

.nav-links a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-links a.active {
  color: var(--accent);
}

.nav-links a.active::after {
  transform: scaleX(1);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background-color: var(--primary);
  transition: all var(--transition-fast);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(10px, 10px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* ============================================================================
   5. HERO SECTIONS
   ============================================================================ */

.hero {
  position: relative;
  overflow: hidden;
  padding: 120px var(--spacing-lg) var(--spacing-3xl);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: var(--white);
  text-align: center;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(45, 140, 240, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(45, 140, 240, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  animation: fadeInUp 0.8s ease-out;
}

.hero h1 {
  color: var(--white);
  margin-bottom: var(--spacing-md);
  font-size: clamp(2.5rem, 6vw, 4rem);
}

.hero p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Hero variant: with side image */
.hero.hero-split {
  text-align: left;
  padding: 100px var(--spacing-lg);
}

.hero-split-container {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.hero-split-content {
  animation: fadeInLeft 0.8s ease-out;
}

.hero-split-image {
  animation: fadeInRight 0.8s ease-out;
}

/* ============================================================================
   6. SECTION LAYOUTS
   ============================================================================ */

section {
  scroll-margin-top: 80px;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
  animation: fadeIn 0.6s ease-out;
}

.section-header h2 {
  margin-bottom: var(--spacing-md);
}

.section-header p {
  font-size: 1.125rem;
  color: var(--text-light);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.section-tag {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--accent);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.section-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.content-section {
  padding: var(--spacing-3xl) 0;
}

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

.content-section.dark {
  background-color: var(--bg-dark);
  color: var(--white);
}

.content-section.dark h2,
.content-section.dark h3,
.content-section.dark h4,
.content-section.dark h5,
.content-section.dark h6 {
  color: var(--white);
}

.content-section.dark p {
  color: rgba(255, 255, 255, 0.85);
}

.content-section.dark .text-light {
  color: rgba(255, 255, 255, 0.7);
}

/* ============================================================================
   7. FEATURE/SERVICE CARD GRIDS
   ============================================================================ */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-3xl);
}

.card-grid.cols-1 {
  grid-template-columns: 1fr;
}

.card-grid.cols-2 {
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
}

.card-grid.cols-3 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.card {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-base);
  animation: fadeIn 0.6s ease-out;
}

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

.card-header {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.card-icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  border-radius: var(--radius-lg);
  color: var(--white);
  font-size: 1.5rem;
}

.card h3 {
  margin-bottom: var(--spacing-sm);
  font-size: 1.25rem;
}

.card p {
  color: var(--text-light);
  font-size: 0.95rem;
  margin-bottom: 0;
}

.card.dark {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.1);
}

.card.dark:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(45, 140, 240, 0.3);
}

.card.dark h3,
.card.dark p {
  color: var(--white);
}

.card.dark p {
  color: rgba(255, 255, 255, 0.8);
}

/* ============================================================================
   8. TWO-COLUMN LAYOUTS WITH CHECKLISTS
   ============================================================================ */

.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.two-column-image img,
.two-column-image .placeholder {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

.checklist {
  list-style: none;
  margin-bottom: 0;
}

.checklist li {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border);
}

.checklist li:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.checklist li::before {
  content: '✓';
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  min-width: 24px;
  background-color: var(--success);
  color: var(--white);
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.75rem;
  margin-top: 2px;
}

.checklist li strong {
  display: block;
  color: var(--primary);
  margin-bottom: 4px;
  font-size: 0.95rem;
}

.checklist li span {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* ============================================================================
   9. PROCESS/METHODOLOGY STEP DISPLAYS
   ============================================================================ */

.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-3xl);
  position: relative;
}

.process-step {
  position: relative;
  padding-left: 60px;
  animation: fadeIn 0.6s ease-out;
}

.process-step::before {
  content: attr(data-step);
  position: absolute;
  left: 0;
  top: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  color: var(--white);
  border-radius: 50%;
  font-weight: 700;
  font-size: 1.25rem;
  font-family: 'Space Grotesk', sans-serif;
}

.process-step h3 {
  margin-bottom: var(--spacing-sm);
  font-size: 1.125rem;
}

.process-step p {
  color: var(--text-light);
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* Vertical timeline variant */
.process-timeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  max-width: 600px;
  margin: 0 auto;
}

.process-timeline .process-step {
  padding-left: 60px;
  padding-bottom: var(--spacing-xl);
  border-left: 2px solid var(--border);
  position: relative;
}

.process-timeline .process-step:last-child {
  border-left-color: transparent;
}

.process-timeline .process-step::before {
  left: -25px;
  background: var(--white);
  border: 3px solid var(--accent);
}

/* ============================================================================
   10. CTA BANNERS WITH GRADIENT
   ============================================================================ */

.cta-banner {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: var(--white);
  padding: var(--spacing-3xl) var(--spacing-lg);
  border-radius: var(--radius-lg);
  text-align: center;
  position: relative;
  overflow: hidden;
  animation: fadeIn 0.6s ease-out;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(45, 140, 240, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.cta-banner-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
  margin: 0 auto;
}

.cta-banner h2 {
  color: var(--white);
  margin-bottom: var(--spacing-md);
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-lg);
  font-size: 1.125rem;
}

/* ============================================================================
   11. STATS BAR
   ============================================================================ */

.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
  text-align: center;
  padding: var(--spacing-2xl) 0;
}

.stat {
  animation: scaleIn 0.6s ease-out;
}

.stat-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--accent);
  margin-bottom: var(--spacing-sm);
  line-height: 1;
}

.stat-label {
  color: var(--text-light);
  font-size: 0.95rem;
  font-weight: 500;
}

/* ============================================================================
   12. TECHNOLOGY GRID ITEMS
   ============================================================================ */

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-3xl);
}

.tech-item {
  background: linear-gradient(135deg, var(--white) 0%, var(--bg-light) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-base);
  animation: fadeIn 0.6s ease-out;
}

.tech-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.tech-item-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  border-radius: var(--radius-md);
  color: var(--white);
  font-size: 1.75rem;
  margin-bottom: var(--spacing-md);
}

.tech-item h3 {
  margin-bottom: var(--spacing-sm);
  font-size: 1.125rem;
}

.tech-item p {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-md);
}

.tech-specs {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.tech-spec {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-sm);
  background-color: var(--white);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
}

.tech-spec-label {
  color: var(--text-light);
  font-weight: 500;
}

.tech-spec-value {
  color: var(--primary);
  font-weight: 600;
}

/* ============================================================================
   13. FOOTER
   ============================================================================ */

footer {
  background-color: var(--bg-dark);
  color: rgba(255, 255, 255, 0.8);
  padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-column h4 {
  color: var(--white);
  margin-bottom: var(--spacing-md);
  font-size: 1rem;
}

.footer-column ul {
  list-style: none;
  margin: 0;
}

.footer-column li {
  margin-bottom: var(--spacing-sm);
}

.footer-column a {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast);
  font-size: 0.9rem;
}

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

.footer-divider {
  height: 1px;
  background-color: rgba(255, 255, 255, 0.1);
  margin: var(--spacing-2xl) 0;
}

.footer-bottom {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
}

.footer-copyright {
  margin: 0;
}

.footer-social {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
  margin: 0;
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: rgba(45, 140, 240, 0.1);
  color: var(--accent);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background-color: var(--accent);
  color: var(--white);
  transform: translateY(-2px);
}

/* ============================================================================
   14. BLOCKQUOTE STYLES
   ============================================================================ */

blockquote {
  border-left: 4px solid var(--accent);
  padding-left: var(--spacing-lg);
  padding: var(--spacing-lg);
  padding-left: var(--spacing-lg);
  background-color: var(--bg-light);
  border-radius: var(--radius-md);
  margin: var(--spacing-lg) 0;
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--primary);
  font-style: italic;
}

blockquote p {
  margin-bottom: var(--spacing-sm);
}

.blockquote-author {
  margin-top: var(--spacing-md);
  color: var(--text-light);
  font-size: 0.9rem;
  font-style: normal;
}

.blockquote-author strong {
  color: var(--text);
  font-weight: 600;
}

/* Expert quote variant */
.expert-quote {
  display: flex;
  gap: var(--spacing-lg);
  align-items: flex-start;
  background: linear-gradient(135deg, rgba(15, 43, 70, 0.05) 0%, rgba(45, 140, 240, 0.05) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.expert-quote-avatar {
  width: 64px;
  height: 64px;
  min-width: 64px;
  border-radius: 50%;
  background-color: var(--accent);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.5rem;
}

.expert-quote-content h4 {
  margin-bottom: var(--spacing-sm);
  color: var(--primary);
}

.expert-quote-content p {
  margin-bottom: var(--spacing-sm);
  color: var(--text);
  font-style: italic;
}

.expert-quote-meta {
  color: var(--text-light);
  font-size: 0.85rem;
}

/* ============================================================================
   15. FAQ ACCORDION STYLES
   ============================================================================ */

.accordion {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--spacing-xl);
}

.accordion-item {
  border-bottom: 1px solid var(--border);
  animation: fadeIn 0.6s ease-out;
}

.accordion-item:last-child {
  border-bottom: none;
}

.accordion-header {
  background-color: var(--white);
  padding: var(--spacing-lg);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color var(--transition-fast);
  user-select: none;
}

.accordion-header:hover {
  background-color: var(--bg-light);
}

.accordion-header h4 {
  margin: 0;
  color: var(--primary);
  font-size: 1.125rem;
}

.accordion-toggle {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.accordion-item.open .accordion-toggle {
  transform: rotate(180deg);
}

.accordion-content {
  background-color: var(--bg-light);
  padding: 0 var(--spacing-lg);
  max-height: 0;
  overflow: hidden;
  transition: all var(--transition-base);
}

.accordion-item.open .accordion-content {
  max-height: 1000px;
  padding: var(--spacing-lg);
}

.accordion-content p {
  color: var(--text-light);
  margin-bottom: 0;
}

/* ============================================================================
   16. TABLE STYLES
   ============================================================================ */

table {
  width: 100%;
  border-collapse: collapse;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: var(--spacing-lg) 0;
  background-color: var(--white);
  box-shadow: var(--shadow-sm);
}

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

th {
  padding: var(--spacing-md);
  text-align: left;
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

td {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}

tbody tr {
  transition: background-color var(--transition-fast);
}

tbody tr:hover {
  background-color: var(--bg-light);
}

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

/* Comparison table variant */
.comparison-table th.feature {
  text-align: left;
  background-color: var(--bg-light);
  color: var(--primary);
  font-weight: 600;
}

.comparison-table td.feature {
  background-color: var(--bg-light);
  font-weight: 500;
  color: var(--primary);
  border-bottom: 1px solid var(--border);
}

.comparison-table .checkmark {
  color: var(--success);
  font-weight: 700;
  font-size: 1.25rem;
  text-align: center;
}

.comparison-table .cross {
  color: var(--error);
  font-weight: 700;
  font-size: 1.25rem;
  text-align: center;
}

/* ============================================================================
   17. BREADCRUMB STYLES
   ============================================================================ */

.breadcrumb {
  display: flex;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg) 0;
  font-size: 0.9rem;
  list-style: none;
  margin: 0;
}

.breadcrumb li {
  margin: 0;
}

.breadcrumb a {
  color: var(--accent);
  transition: color var(--transition-fast);
}

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

.breadcrumb li::after {
  content: '/';
  margin-left: var(--spacing-sm);
  color: var(--border);
}

.breadcrumb li:last-child::after {
  display: none;
}

.breadcrumb li:last-child {
  color: var(--text-light);
}

/* ============================================================================
   18. BADGE/TAG STYLES
   ============================================================================ */

.badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-xl);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: all var(--transition-fast);
}

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

.badge-primary:hover {
  background-color: var(--accent-hover);
}

.badge-secondary {
  background-color: var(--bg-light);
  color: var(--primary);
  border: 1px solid var(--border);
}

.badge-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.badge-success {
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-warning {
  background-color: rgba(245, 158, 11, 0.1);
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-error {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--error);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

/* ============================================================================
   19. FORM STYLES
   ============================================================================ */

form {
  margin: var(--spacing-lg) 0;
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group:last-child {
  margin-bottom: 0;
}

label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  color: var(--primary);
  font-size: 0.95rem;
}

input,
textarea,
select {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 1rem;
  color: var(--text);
  background-color: var(--white);
  transition: all var(--transition-fast);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(45, 140, 240, 0.1);
}

textarea {
  resize: vertical;
  min-height: 120px;
  font-family: 'Inter', sans-serif;
}

input:disabled,
textarea:disabled,
select:disabled {
  background-color: var(--bg-light);
  cursor: not-allowed;
  opacity: 0.6;
}

.form-error {
  color: var(--error);
  font-size: 0.85rem;
  margin-top: 4px;
}

.form-success {
  color: var(--success);
  font-size: 0.85rem;
  margin-top: 4px;
}

/* Contact form layout */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
  background-color: var(--bg-light);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-lg);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
}

.form-row.full {
  grid-template-columns: 1fr;
}

/* ============================================================================
   20. BUTTONS
   ============================================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius-md);
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-transform: none;
  gap: var(--spacing-sm);
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Primary button */
.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  color: var(--white);
  box-shadow: 0 4px 12px rgba(45, 140, 240, 0.3);
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(45, 140, 240, 0.4);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

/* Secondary button */
.btn-secondary {
  background-color: var(--bg-light);
  color: var(--primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
  background-color: var(--white);
}

/* Outline button */
.btn-outline {
  background-color: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}

.btn-outline:hover:not(:disabled) {
  background-color: var(--accent);
  color: var(--white);
}

/* Dark button */
.btn-dark {
  background-color: var(--primary);
  color: var(--white);
}

.btn-dark:hover:not(:disabled) {
  background-color: var(--primary-light);
  transform: translateY(-2px);
}

/* Button sizes */
.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

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

/* ============================================================================
   21. IMAGE PLACEHOLDER STYLES
   ============================================================================ */

.placeholder {
  background: linear-gradient(135deg, var(--bg-light) 0%, #e5eef5 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: 3rem;
  position: relative;
  overflow: hidden;
}

.placeholder::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: shimmer 2s infinite;
}

.placeholder.small {
  min-height: 200px;
  font-size: 2rem;
}

.placeholder.medium {
  min-height: 400px;
  font-size: 3rem;
}

.placeholder.large {
  min-height: 600px;
  font-size: 4rem;
}

.img-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.img-contain {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}

/* ============================================================================
   22. ANIMATIONS
   ============================================================================ */

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes shimmer {
  0% {
    left: -100%;
  }
  100% {
    left: 100%;
  }
}

/* ============================================================================
   23. RESPONSIVE BREAKPOINTS
   ============================================================================ */

/* Tablet breakpoint: 960px */
@media (max-width: 960px) {
  .hero {
    padding: 100px var(--spacing-md) var(--spacing-2xl);
    min-height: auto;
  }

  .hero-split-container {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  .two-column {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  .card-grid.cols-2 {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .nav-links {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .content-section {
    padding: var(--spacing-2xl) 0;
  }

  .section-container {
    padding: 0 var(--spacing-md);
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .contact-form {
    padding: var(--spacing-lg);
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  h3 {
    font-size: 1.25rem;
  }
}

/* Mobile breakpoint: 640px */
@media (max-width: 640px) {
  :root {
    font-size: 15px;
  }

  .nav-container {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .nav-logo {
    font-size: 1.25rem;
  }

  body {
    font-size: 15px;
  }

  .hero {
    padding: 80px var(--spacing-md) var(--spacing-xl);
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero p {
    font-size: 1rem;
  }

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

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

  .section-header {
    margin-bottom: var(--spacing-2xl);
  }

  .section-header h2 {
    font-size: 1.5rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .process-steps {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
  }

  .stat-number {
    font-size: 2rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .footer-column {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: var(--spacing-lg);
  }

  .footer-column:last-child {
    border-bottom: none;
  }

  .checklist li {
    gap: var(--spacing-sm);
  }

  .two-column-image {
    margin-top: var(--spacing-lg);
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  h3 {
    font-size: 1.125rem;
  }

  .content-section {
    padding: var(--spacing-xl) 0;
  }

  .section-container {
    padding: 0 var(--spacing-sm);
  }

  table {
    font-size: 0.85rem;
  }

  th,
  td {
    padding: var(--spacing-sm);
  }

  .accordion-header {
    padding: var(--spacing-md);
  }

  .accordion-content {
    padding: 0 var(--spacing-md);
  }

  .accordion-item.open .accordion-content {
    padding: var(--spacing-md);
  }

  .btn {
    padding: 0.75rem 1.25rem;
    width: 100%;
  }

  .btn-sm {
    padding: 0.5rem 0.75rem;
  }

  .expert-quote {
    flex-direction: column;
    text-align: center;
  }

  .expert-quote-avatar {
    margin: 0 auto;
  }

  .cta-banner {
    padding: var(--spacing-2xl) var(--spacing-md);
  }

  .breadcrumb {
    flex-wrap: wrap;
  }
}

/* ============================================================================
   24. UTILITY CLASSES
   ============================================================================ */

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

.text-right {
  text-align: right;
}

.text-left {
  text-align: left;
}

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

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

.text-light {
  color: var(--text-light);
}

.text-white {
  color: var(--white);
}

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

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

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

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

.mt-sm {
  margin-top: var(--spacing-sm);
}

.mt-md {
  margin-top: var(--spacing-md);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mt-xl {
  margin-top: var(--spacing-xl);
}

.mb-sm {
  margin-bottom: var(--spacing-sm);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.mb-xl {
  margin-bottom: var(--spacing-xl);
}

.pt-sm {
  padding-top: var(--spacing-sm);
}

.pt-md {
  padding-top: var(--spacing-md);
}

.pt-lg {
  padding-top: var(--spacing-lg);
}

.pb-sm {
  padding-bottom: var(--spacing-sm);
}

.pb-md {
  padding-bottom: var(--spacing-md);
}

.pb-lg {
  padding-bottom: var(--spacing-lg);
}

.max-width-container {
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
}

.max-width-sm {
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.max-width-md {
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.shadow-sm {
  box-shadow: var(--shadow-sm);
}

.shadow-md {
  box-shadow: var(--shadow-md);
}

.shadow-lg {
  box-shadow: var(--shadow-lg);
}

.shadow-xl {
  box-shadow: var(--shadow-xl);
}

.rounded-sm {
  border-radius: var(--radius-sm);
}

.rounded-md {
  border-radius: var(--radius-md);
}

.rounded-lg {
  border-radius: var(--radius-lg);
}

.rounded-xl {
  border-radius: var(--radius-xl);
}

.border {
  border: 1px solid var(--border);
}

.border-top {
  border-top: 1px solid var(--border);
}

.border-bottom {
  border-bottom: 1px solid var(--border);
}

.opacity-50 {
  opacity: 0.5;
}

.opacity-75 {
  opacity: 0.75;
}

.hidden {
  display: none !important;
}

.visible {
  display: block !important;
}

.inline-block {
  display: inline-block;
}

.flex {
  display: flex;
}

.grid {
  display: grid;
}

/* ============================================================================
   25. PRINT STYLES
   ============================================================================ */

@media print {
  nav.main-nav,
  footer {
    display: none;
  }

  body {
    background-color: var(--white);
    color: var(--text);
  }

  .section-container {
    max-width: 100%;
  }

  a {
    text-decoration: underline;
  }

  .btn {
    border: 1px solid var(--text);
  }

  .no-print {
    display: none !important;
  }
}