/* CSS Variables */
:root {
  /* Colors */
  --color-primary: #6366f1;
  --color-primary-dark: #4f46e5;
  --color-secondary: #8b5cf6;
  --color-accent: #ec4899;
  --color-text: #1f2937;
  --color-text-light: #6b7280;
  --color-bg: #ffffff;
  --color-bg-light: #f9fafb;
  --color-bg-dark: #111827;
  --color-border: #e5e7eb;
  
  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-base: 16px;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 5rem;
  --spacing-5xl: 6rem;
  
  /* Layout */
  --container-max-width: 1200px;
  --container-padding: 1.5rem;
  --section-padding: 3rem;
  
  /* Borders */
  --border-radius-sm: 0.375rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 0.75rem;
  --border-radius-xl: 1rem;
  --border-radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 200ms ease-in-out;
  --transition-slow: 300ms ease-in-out;
  
  /* Breakpoints (for reference in media queries) */
  /* --bp-sm: 480px; */
  /* --bp-md: 768px; */
  /* --bp-lg: 1024px; */
  /* --bp-xl: 1280px; */
}

/* Base Styles */
html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-base);
  font-weight: var(--font-weight-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: var(--line-height-normal);
}

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

/* Typography */
h1,
h2,
h3 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
}

h1 {
  font-size: var(--font-size-3xl);
}

h2 {
  font-size: var(--font-size-2xl);
}

h3 {
  font-size: var(--font-size-xl);
}

p {
  line-height: var(--line-height-relaxed);
  color: var(--color-text-light);
}

/* Container */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

/* Section */
.section {
  padding-top: var(--section-padding);
  padding-bottom: var(--section-padding);
}

.section__title {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

/* Button Component */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-xl);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-base);
  text-align: center;
  min-height: 44px;
  min-width: 44px;
}

.button__icon {
  flex-shrink: 0;
}

.button--primary {
  background-color: var(--color-primary);
  color: var(--color-bg);
  box-shadow: var(--shadow-md);
}

.button--primary:hover,
.button--primary:focus {
  background-color: var(--color-primary-dark);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

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

.button--large {
  padding: var(--spacing-md) 2.3rem;
  font-size: var(--font-size-xl);
}

/* Card Component */
.card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-xl);
  text-align: center;
  transition: all var(--transition-base);
}

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

.card__icon {
  font-size: var(--font-size-5xl);
  margin-bottom: var(--spacing-md);
  text-align: center;
  display: block;
  width: 100%;
}

.card__icon img {
  width: 60px !important;
  height: 60px !important;
  object-fit: contain;
  display: inline-block;
  margin: 0 auto;
  background: transparent !important;
}

.card__title {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.card__description {
  font-size: var(--font-size-sm);
}

/* Navbar */
.navbar {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding-top: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.navbar__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
}

.navbar__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.navbar__logo-icon {
  flex-shrink: 0;
  border-radius: var(--border-radius-md);
  object-fit: contain;
}

.navbar__logo-text {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  font-size: clamp(0.875rem, 2vw + 0.5rem, 1.125rem);
  white-space: nowrap;
}

.navbar__contact {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-base);
  white-space: nowrap;
  flex-shrink: 0;
  transition: all var(--transition-base);
}

.navbar__contact:hover,
.navbar__contact:focus {
  color: var(--color-primary-dark);
  transform: translateX(2px);
}

.navbar__contact-icon {
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

.navbar__contact:hover .navbar__contact-icon,
.navbar__contact:focus .navbar__contact-icon {
  transform: scale(1.1);
}

.navbar__contact-text {
  display: inline;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: var(--color-bg);
  padding-top: var(--spacing-5xl);
  padding-bottom: var(--spacing-5xl);
  text-align: center;
}

.hero .container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero__title {
  color: var(--color-bg);
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-3xl);
}

.hero__subtitle {
  color: rgba(255, 255, 255, 0.95);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-medium);
  margin-bottom: calc(var(--spacing-lg) * 0.85);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero__highlight {
  color: var(--color-bg);
  font-weight: var(--font-weight-bold);
  background-color: var(--color-accent);
  padding: 0.125rem 0.5rem;
  border-radius: var(--border-radius-sm);
}

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

.hero .button:hover,
.hero .button:focus {
  background-color: rgba(255, 255, 255, 0.95);
  transform: translateY(-2px);
}

.hero__counter {
  color: rgba(255, 255, 255, 0.95);
  font-size: var(--font-size-xl);
  margin-top: var(--spacing-2xl);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  justify-content: center;
  font-weight: var(--font-weight-medium);
  width: 100%;
}

.hero__counter strong {
  font-weight: var(--font-weight-bold);
  color: var(--color-bg);
  font-size: var(--font-size-xl);
}

/* Counter Display (Табло) */
#user-counter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 68px;
  padding: 0.34rem 0.85rem;
  background: linear-gradient(180deg, #1a1a1a 0%, #0a0a0a 100%);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-md);
  font-family: 'Courier New', 'Courier', monospace;
  font-size: 1.9125rem;
  font-weight: var(--font-weight-bold);
  color: #e879f9;
  text-shadow: 0 0 10px rgba(232, 121, 249, 0.6),
               0 0 20px rgba(232, 121, 249, 0.4);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.5),
              0 4px 8px rgba(0, 0, 0, 0.3);
  letter-spacing: 0.1em;
  animation: counterFlip 0.6s ease-out;
  position: relative;
}

#user-counter::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: rgba(255, 255, 255, 0.05);
  transform: translateY(-50%);
}

@keyframes counterFlip {
  0% {
    transform: perspective(400px) rotateX(-90deg);
    opacity: 0;
  }
  50% {
    transform: perspective(400px) rotateX(-10deg);
  }
  100% {
    transform: perspective(400px) rotateX(0deg);
    opacity: 1;
  }
}

/* Benefits Section */
.benefits {
  background-color: var(--color-bg);
}

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

/* Examples Section (Slider) */
.examples {
  background-color: var(--color-bg);
}

.slider {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
}

.slider__wrapper {
  position: relative;
  width: 100%;
  min-height: 350px;
}

.slider__slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  opacity: 0;
  transition: opacity var(--transition-slow);
  pointer-events: none;
}

.slider__slide--active {
  opacity: 1;
  pointer-events: auto;
}

.task-card {
  background-color: var(--color-bg-light);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-md);
  min-height: 300px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.task-card__title {
  color: var(--color-primary);
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-xl);
}

.task-card__question {
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--color-text);
}

.slider__arrow {
  display: none;
}

.slider__dots {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xl);
}

.slider__dot {
  width: 12px;
  height: 12px;
  border-radius: var(--border-radius-full);
  background-color: var(--color-border);
  transition: all var(--transition-base);
}

.slider__dot:hover,
.slider__dot:focus {
  background-color: var(--color-text-light);
}

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

.slider__dot--active {
  background-color: var(--color-primary);
  width: 32px;
}

/* How It Works Section */
.how-it-works {
  background-color: var(--color-bg-light);
}

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

.step {
  text-align: center;
}

.step__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: var(--color-bg);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  border-radius: var(--border-radius-full);
  margin-bottom: var(--spacing-md);
}

.step__title {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.step__description {
  font-size: var(--font-size-sm);
}

/* CTA Section */
.cta {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: var(--color-bg);
  text-align: center;
  padding-top: var(--spacing-4xl);
  padding-bottom: var(--spacing-4xl);
}

.cta__title {
  color: var(--color-bg);
  margin-bottom: calc(var(--spacing-md) * 4.18);
}

.cta__subtitle {
  color: rgba(255, 255, 255, 0.95);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-2xl);
}

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

.cta .button:hover,
.cta .button:focus {
  background-color: rgba(255, 255, 255, 0.95);
}

/* Footer */
.footer {
  background-color: var(--color-bg-dark);
  color: var(--color-bg-light);
  text-align: center;
  padding-top: var(--spacing-2xl);
  padding-bottom: var(--spacing-2xl);
}

.footer__copyright {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--spacing-xs);
}

.footer__link a {
  color: var(--color-primary);
  transition: color var(--transition-base);
}

.footer__link a:hover,
.footer__link a:focus {
  color: var(--color-secondary);
}

/* Responsive Design - Tablet */
@media (min-width: 768px) {
  :root {
    --section-padding: 4rem;
  }
  
  h1 {
    font-size: var(--font-size-4xl);
  }
  
  h2 {
    font-size: var(--font-size-3xl);
  }
  
  .hero__title {
    font-size: var(--font-size-5xl);
  }
  
  .benefits__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .steps {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
  }
}

/* Responsive Design - Desktop */
@media (min-width: 1024px) {
  :root {
    --section-padding: 5rem;
    --container-padding: 2rem;
  }
  
  .hero {
    padding-top: var(--spacing-5xl);
    padding-bottom: var(--spacing-5xl);
  }
  
  .benefits__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Responsive Design - Small Mobile */
@media (max-width: 480px) {
  .navbar__contact {
    font-size: var(--font-size-sm);
  }
  
  .navbar__contact-icon {
    width: 20px;
    height: 20px;
  }
  
  .task-card {
    padding: var(--spacing-lg);
  }
  
  .hero__title {
    font-size: var(--font-size-2xl);
  }
  
  .hero__subtitle {
    font-size: var(--font-size-lg);
  }
  
  .hero__highlight {
    display: inline-block;
  }
  
  .cta__title {
    margin-bottom: calc(var(--spacing-md) * 2);
  }
}

/* Responsive Design - Extra Small Mobile */
@media (max-width: 400px) {
  .navbar__logo-icon {
    width: 32px;
    height: 32px;
  }
  
  .navbar__logo-text {
    white-space: normal;
    line-height: 1.2;
  }
  
  .navbar__contact {
    font-size: 0.75rem;
  }
  
  .navbar__contact-icon {
    width: 18px;
    height: 18px;
  }
  
  .navbar__contact-text {
    display: none;
  }
}