/* ============================================================================
   SYNERGI AI WEBSITE - COMPREHENSIVE STYLESHEET
   Version 1.0
   ============================================================================ */

/* ============================================================================
   CSS CUSTOM PROPERTIES (Brand Colors, Fonts, Spacing)
   ============================================================================ */

:root {
  /* Dark Brand Colors */
  --primary: #77bde0;
  --secondary: #b78bd3;
  --accent: #dc9171;
  
  /* Light Brand Colors */
  --primary-light: #85ecf8;
  --secondary-light: #f0d4fa;
  --accent-light: #ffe7ba;
  
  /* Backgrounds & Surfaces */
  --bg-dark: #0a0e1a;
  --bg-darker: #050609;
  --bg-light: #f8f9fc;
  --bg-white: #ffffff;
  
  /* Text Colors */
  --text-primary: #ffffff;
  --text-secondary: #b0b8c4;
  --text-muted: #7a8292;
  --text-dark: #1a1f2e;
  
  /* Borders & Dividers */
  --border-color: rgba(255, 255, 255, 0.1);
  --border-light: rgba(0, 0, 0, 0.08);
  
  /* Fonts */
  --font-heading: 'Roboto', sans-serif;
  --font-body: 'Poppins', sans-serif;
  --font-condensed: 'Roboto Condensed', sans-serif;
  
  /* Spacing Scale */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Shadow System */
  --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 25px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
}

/* ============================================================================
   RESET & BASE STYLES
   ============================================================================ */

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  letter-spacing: 0.3px;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.5px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

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

/* ============================================================================
   TYPOGRAPHY SYSTEM
   ============================================================================ */

h1 {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xl);
}

h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
}

h3 {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

h4 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  font-weight: 300;
  letter-spacing: 0.5px;
}

.text-muted {
  color: var(--text-muted);
  font-size: 0.875rem;
}

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

.text-gradient {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================================================
   LAYOUT
   ============================================================================ */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1;
}

/* ============================================================================
   NAVIGATION
   ============================================================================ */

.top-bar {
  background-color: var(--bg-dark);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-md) 0;
  position: relative;
  z-index: 50;
}

.navbar {
  position: sticky;
  top: 0;
  background: rgba(10, 14, 26, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-lg) 0;
  z-index: 100;
}

.navbar-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: transform var(--transition-base);
}

.nav-logo:hover {
  transform: scale(1.05);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-2xl);
  list-style: none;
}

.nav-menu a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-base);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--primary);
}

.nav-cta {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

/* ============================================================================
   HERO SECTIONS
   ============================================================================ */

.hero {
  position: relative;
  padding: 6rem var(--spacing-xl) 5rem;
  background: linear-gradient(135deg, var(--bg-dark) 0%, rgba(183, 139, 211, 0.05) 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(119, 189, 224, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  filter: blur(60px);
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  right: 5%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(220, 145, 113, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  filter: blur(60px);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
}

.hero-badge {
  display: inline-block;
  background: rgba(119, 189, 224, 0.15);
  border: 1px solid var(--primary);
  border-radius: var(--radius-full);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--primary);
  margin-bottom: var(--spacing-lg);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.hero h1 {
  font-size: 4rem;
  line-height: 1.1;
  margin-bottom: var(--spacing-xl);
}

.hero h1 .gradient {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

/* ============================================================================
   SECTIONS
   ============================================================================ */

.section {
  padding: 5rem var(--spacing-xl);
  position: relative;
}

.section-dark {
  background-color: var(--bg-darker);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

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

.section-light a {
  color: var(--primary);
}

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

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

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title h2 {
  margin-bottom: var(--spacing-lg);
}

/* ============================================================================
   CARDS
   ============================================================================ */

.card {
  background-color: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  border: 1px solid var(--border-light);
  color: var(--text-dark);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.card h3,
.card h4 {
  color: var(--text-dark);
}

.card p {
  color: var(--text-dark);
}

.feature-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.feature-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
  flex-shrink: 0;
}

.pricing-card {
  background-color: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  transition: all var(--transition-base);
  text-align: center;
  display: flex;
  flex-direction: column;
  color: var(--text-dark);
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: var(--text-primary);
  transform: scale(1.05);
  box-shadow: var(--shadow-xl);
  border: none;
}

.pricing-card.featured h3,
.pricing-card.featured p,
.pricing-card.featured .pricing-price {
  color: var(--text-primary);
}

.pricing-card.featured .btn-primary {
  background-color: var(--bg-white);
  color: var(--primary);
}

.pricing-card.featured .btn-primary:hover {
  background-color: var(--bg-light);
}

.pricing-price {
  font-size: 3rem;
  font-weight: 700;
  color: var(--text-dark);
  margin: var(--spacing-lg) 0;
}

.pricing-card.featured .pricing-price {
  color: var(--text-primary);
}

.pricing-features {
  text-align: left;
  margin: var(--spacing-2xl) 0;
  flex: 1;
}

.pricing-features li {
  list-style: none;
  padding: var(--spacing-sm) 0;
  color: var(--text-dark);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.pricing-card.featured .pricing-features li {
  color: var(--text-primary);
}

.pricing-features li::before {
  content: '✓';
  color: var(--primary);
  font-weight: 700;
  font-size: 1.25rem;
}

/* ============================================================================
   BUTTONS
   ============================================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

.btn-secondary {
  background-color: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}

.btn-secondary:hover {
  background-color: rgba(119, 189, 224, 0.1);
  color: var(--primary-light);
}

.btn-large {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: 1rem;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-md);
}

/* ============================================================================
   GRID LAYOUTS
   ============================================================================ */

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

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-2xl);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xl);
}

/* ============================================================================
   STATS
   ============================================================================ */

.stat {
  text-align: center;
}

.stat-number {
  font-size: 3.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: var(--spacing-md);
}

.stat-label {
  font-size: 1rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
}

/* ============================================================================
   FOOTER
   ============================================================================ */

.footer {
  background-color: var(--bg-darker);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-2xl) var(--spacing-xl) var(--spacing-xl);
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-section h4 {
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: color var(--transition-base);
}

.footer-links a:hover {
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: var(--spacing-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ============================================================================
   ANIMATIONS
   ============================================================================ */

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: all var(--transition-base);
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-scale {
  animation: fadeInScale var(--transition-base) ease-out;
}

/* ============================================================================
   PRICING TOGGLE
   ============================================================================ */

.toggle-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.toggle-label {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.toggle-switch {
  position: relative;
  width: 60px;
  height: 32px;
  background-color: rgba(119, 189, 224, 0.2);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background-color var(--transition-base);
  border: 2px solid var(--border-color);
}

.toggle-switch.active {
  background-color: var(--primary);
}

.toggle-switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 24px;
  height: 24px;
  background-color: var(--text-primary);
  border-radius: 50%;
  transition: left var(--transition-base);
}

.toggle-switch.active::after {
  left: 32px;
}

.pricing-item {
  display: none;
}

.pricing-item.visible {
  display: block;
  animation: fadeUp var(--transition-base) ease-out;
}

/* ============================================================================
   FAQ ACCORDION
   ============================================================================ */

.faq-item {
  background-color: var(--bg-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  overflow: hidden;
  margin-bottom: var(--spacing-lg);
  transition: all var(--transition-base);
  color: var(--text-dark);
}

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

.faq-question {
  padding: var(--spacing-xl);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  font-size: 1rem;
  background-color: var(--bg-white);
  transition: background-color var(--transition-base);
  color: var(--text-dark);
}

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

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--primary);
  transition: transform var(--transition-base);
  font-weight: 300;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base), padding var(--transition-base);
  padding: 0 var(--spacing-xl);
  color: var(--text-dark);
  font-size: 0.95rem;
  line-height: 1.6;
}

.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 0 var(--spacing-xl) var(--spacing-xl);
}

/* ============================================================================
   RESPONSIVE BREAKPOINTS
   ============================================================================ */

@media (max-width: 1024px) {
  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 2rem;
  }

  h3 {
    font-size: 1.5rem;
  }

  .hero h1 {
    font-size: 3rem;
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .nav-menu {
    gap: var(--spacing-lg);
  }

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

  .pricing-card.featured {
    transform: scale(1);
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-2xl: 2rem;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  h3 {
    font-size: 1.25rem;
  }

  .hero {
    padding: 3rem var(--spacing-lg) 2rem;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-badge {
    font-size: 0.75rem;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .nav-menu {
    display: none;
  }

  .nav-cta {
    gap: var(--spacing-md);
  }

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

  .section {
    padding: 2rem var(--spacing-lg);
  }

  .card,
  .pricing-card {
    padding: var(--spacing-lg);
  }

  .stat-number {
    font-size: 2.5rem;
  }

  .toggle-container {
    flex-direction: column;
    gap: var(--spacing-md);
  }

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

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

@media (max-width: 480px) {
  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  .hero h1 {
    font-size: 1.5rem;
  }

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

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

  .btn {
    width: 100%;
  }

  .pricing-price {
    font-size: 2rem;
  }

  .section-title {
    margin-bottom: 2rem;
  }
}

/* ============================================================================
   UTILITY CLASSES
   ============================================================================ */

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

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

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

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

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

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.w-full {
  width: 100%;
}

.hidden {
  display: none;
}

.visible {
  display: block;
}

/* ============================================================================
   END OF STYLESHEET
   ============================================================================ */