@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap");

:root {
  --font-primary: "Inter", sans-serif;

  /* Light Theme */
  --color-background: #f9fafb;
  --color-background-secondary: #ffffff;
  --color-background-accent: #eff6ff;
  --color-background-contrast: #111827;
  --color-text-primary: #1f2937;
  --color-text-secondary: #4b5563;
  --color-text-contrast: #ffffff;
  --color-brand-primary: #2563eb;
  --color-brand-secondary: #1d4ed8;
  --color-accent-green: #22c55e;
  --color-accent-yellow: #fbbf24;
  --color-border: #e5e7eb;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1),
    0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1),
    0 8px 10px -6px rgb(0 0 0 / 0.1);

  --spacing-unit: 1rem;
  --border-radius: 0.75rem;
  --transition-speed: 300ms;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-background: #111827;
    --color-background-secondary: #1f2937;
    --color-background-accent: #1e293b;
    --color-background-contrast: #f9fafb;
    --color-text-primary: #f3f4f6;
    --color-text-secondary: #9ca3af;
    --color-text-contrast: #111827;
    --color-brand-primary: #3b82f6;
    --color-brand-secondary: #60a5fa;
    --color-accent-green: #4ade80;
    --color-accent-yellow: #facc15;
    --color-border: #374151;
  }
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  background-color: var(--color-background);
  color: var(--color-text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Глобальные стили для SVG иконок */
svg {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Стили для конкретных размеров иконок */
.icon-sm {
  width: 1rem;
  height: 1rem;
}

.icon-md {
  width: 1.5rem;
  height: 1.5rem;
}

.icon-lg {
  width: 2rem;
  height: 2rem;
}

.icon-xl {
  width: 2.5rem;
  height: 2.5rem;
}

.container {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: calc(var(--spacing-unit) * 1.5);
  padding-right: calc(var(--spacing-unit) * 1.5);
}

section {
  padding-top: calc(var(--spacing-unit) * 5);
  padding-bottom: calc(var(--spacing-unit) * 5);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
}
h2 {
  font-size: clamp(2rem, 4vw, 2.5rem);
}
h3 {
  font-size: clamp(1.5rem, 3vw, 1.875rem);
}
h4 {
  font-size: 1.25rem;
}
p {
  margin-bottom: var(--spacing-unit);
  color: var(--color-text-secondary);
  max-width: 65ch;
}
p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--color-brand-primary);
  text-decoration: none;
  transition: color var(--transition-speed) ease;
}

a:hover {
  color: var(--color-brand-secondary);
}

ul,
ol {
  list-style: none;
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--color-background-secondary);
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition-speed) ease;
}

header nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: calc(var(--spacing-unit) * 5);
}

header nav .logo a {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-text-primary);
}

header nav .nav-links {
  display: none;
}

header nav .nav-links a {
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
}

header nav .nav-links a:hover {
  background-color: var(--color-background-accent);
  color: var(--color-brand-primary);
}

header nav .cta-button {
  display: none;
  background-color: var(--color-brand-primary);
  color: var(--color-text-contrast);
  padding: 0.65rem 1.5rem;
  border-radius: 9999px;
  font-weight: 600;
  transition: background-color var(--transition-speed) ease,
    transform var(--transition-speed) ease;
}

header nav .cta-button:hover {
  background-color: var(--color-brand-secondary);
  transform: scale(1.05);
}

#mobile-menu-button {
  display: block;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

#mobile-menu-button svg {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--color-text-primary);
}

#mobile-menu {
  display: none;
  padding: var(--spacing-unit);
  border-top: 1px solid var(--color-border);
}

#mobile-menu.is-active {
  display: block;
}

#mobile-menu a {
  display: block;
  padding: var(--spacing-unit);
  font-weight: 500;
  border-radius: var(--border-radius);
}

#mobile-menu a:hover {
  background-color: var(--color-background-accent);
}

#mobile-menu .cta-button {
  display: block;
  text-align: center;
  margin-top: var(--spacing-unit);
}

#hero {
  text-align: center;
  padding: calc(var(--spacing-unit) * 6) 0;
  background-color: var(--color-background-secondary);
}

#hero h1 {
  max-width: 20ch;
  margin: 0 auto var(--spacing-unit);
}

#hero p {
  max-width: 50ch;
  margin: 0 auto calc(var(--spacing-unit) * 2);
  font-size: 1.25rem;
}

#hero .cta-button {
  background-color: var(--color-brand-primary);
  color: var(--color-text-contrast);
  padding: 1rem 2rem;
  border-radius: 9999px;
  font-size: 1.125rem;
  font-weight: 600;
  display: inline-block;
  transition: all var(--transition-speed) ease;
}
#hero .cta-button:hover {
  background-color: var(--color-brand-secondary);
  transform: scale(1.05);
}

#product-description .grid-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: calc(var(--spacing-unit) * 2);
}

#product-description .card {
  background-color: var(--color-background-secondary);
  padding: calc(var(--spacing-unit) * 2);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-speed) ease;
}

#product-description .card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

#product-description .icon-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 9999px;
  background-color: var(--color-background-accent);
  margin-bottom: 1.5rem;
}

#product-description .icon-wrapper svg {
  width: 1.5rem;
  height: 1.5rem;
  color: var(--color-brand-primary);
}

#product-description .card h3 {
  margin-bottom: 0.5rem;
}

#benefits .grid-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: calc(var(--spacing-unit) * 4);
  align-items: center;
}

#benefits ul li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

#benefits ul li svg {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  color: var(--color-accent-green);
  margin-top: 0.2rem;
}

#benefits .timeline-wrapper {
  background-color: var(--color-background-accent);
  padding: calc(var(--spacing-unit) * 2);
  border-radius: var(--border-radius);
}

#benefits .timeline {
  position: relative;
  border-left: 2px solid var(--color-border);
}

#benefits .timeline-item {
  position: relative;
  padding-left: 2rem;
  margin-bottom: 2.5rem;
}
#benefits .timeline-item:last-child {
  margin-bottom: 0;
}

#benefits .timeline-item span {
  position: absolute;
  left: -1.5rem;
  top: 0;
  width: 2rem;
  height: 2rem;
  border-radius: 9999px;
  background-color: var(--color-background-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 3px solid var(--color-background-secondary);
}

#benefits .timeline-item span svg {
  width: 1rem;
  height: 1rem;
  color: var(--color-brand-primary);
}

#benefits .timeline-dot {
  position: absolute;
  left: -0.5rem;
  top: 0.1rem;
  width: 1rem;
  height: 1rem;
  border-radius: 9999px;
  background-color: var(--color-brand-primary);
  border: 2px solid var(--color-background-secondary);
}

#case-studies .grid-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: calc(var(--spacing-unit) * 2);
}

#case-studies article {
  background-color: var(--color-background-secondary);
  padding: calc(var(--spacing-unit) * 2);
  border-radius: var(--border-radius);
  display: flex;
  flex-direction: column;
}

#case-studies p {
  font-style: italic;
  flex-grow: 1;
}

#case-studies .author {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 1.5rem;
}

#case-studies .author-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 9999px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-background-accent);
  flex-shrink: 0;
}

#case-studies .author-icon svg {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--color-brand-primary);
}

#mission-vision {
  background-color: var(--color-brand-primary);
  color: var(--color-text-contrast);
}

#mission-vision h3 {
  color: var(--color-text-contrast);
}

#mission-vision p {
  color: #a5b4fc;
}

#mission-vision .grid-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: calc(var(--spacing-unit) * 3);
}

#team .grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: calc(var(--spacing-unit) * 2);
}

#team .team-member {
  text-align: center;
  padding: 1.5rem;
  background-color: var(--color-background-secondary);
  border-radius: var(--border-radius);
}

#team .avatar {
  width: 4rem;
  height: 4rem;
  border-radius: 9999px;
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-background);
  box-shadow: inset 0 2px 4px 0 rgb(0 0 0 / 0.06);
}

#team .avatar svg {
  width: 1.5rem;
  height: 1.5rem;
  color: var(--color-text-secondary);
}

#team .team-member h4 {
  color: var(--color-text-primary);
  margin-bottom: 0.25rem;
}

#team .team-member p {
  color: var(--color-brand-primary);
  font-weight: 500;
  margin: 0;
}

#testimonials .grid-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: calc(var(--spacing-unit) * 2);
}

#testimonials .testimonial-card {
  background-color: var(--color-background-secondary);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
}

#testimonials .stars {
  display: flex;
  gap: 0.125rem;
  color: var(--color-accent-yellow);
  margin-bottom: 1rem;
}

#testimonials .stars svg {
  width: 1rem;
  height: 1rem;
}

#testimonials .author-name {
  font-weight: 700;
  margin-top: 1rem;
  color: var(--color-text-primary);
}

#faq details {
  background-color: var(--color-background-secondary);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
  margin-bottom: 1rem;
}

#faq summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}

#faq summary::-webkit-details-marker {
  display: none;
}

#faq summary svg {
  width: 1.25rem;
  height: 1.25rem;
  transition: transform var(--transition-speed) ease;
  flex-shrink: 0;
}

#faq details[open] summary svg {
  transform: rotate(180deg);
}

#faq .faq-content {
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  margin-top: 1rem;
}

#cta {
  text-align: center;
}

footer {
  background-color: var(--color-background-contrast);
  color: var(--color-text-secondary);
  padding: calc(var(--spacing-unit) * 4) 0;
}

footer h4,
footer h5 {
  color: var(--color-text-contrast);
  margin-bottom: 1rem;
}

footer .grid-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: calc(var(--spacing-unit) * 3);
}

footer ul a {
  color: var(--color-text-secondary);
}

footer ul a:hover {
  color: var(--color-text-contrast);
}

footer .contact-info li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

footer .contact-info svg {
  width: 1rem;
  height: 1rem;
  color: var(--color-text-secondary);
  margin-top: 0.125rem;
  flex-shrink: 0;
}

footer .footer-bottom {
  border-top: 1px solid var(--color-border);
  margin-top: calc(var(--spacing-unit) * 3);
  padding-top: calc(var(--spacing-unit) * 2);
  text-align: center;
}

#cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--color-background-contrast);
  color: var(--color-text-contrast);
  padding: 1.5rem;
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-direction: column;
}

#cookie-banner.is-visible {
  display: flex;
}

#cookie-banner p {
  color: var(--color-text-secondary);
  margin: 0;
}

#cookie-banner a {
  color: var(--color-brand-secondary);
}

#cookie-banner button {
  background-color: var(--color-brand-primary);
  color: var(--color-text-contrast);
  padding: 0.65rem 1.5rem;
  border: none;
  border-radius: 9999px;
  cursor: pointer;
  font-weight: 500;
  white-space: nowrap;
  width: 100%;
  transition: background-color var(--transition-speed) ease;
}

#cookie-banner button:hover {
  background-color: var(--color-brand-secondary);
}

@media (min-width: 768px) {
  header nav .nav-links,
  header nav .cta-button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  #mobile-menu-button,
  #mobile-menu {
    display: none;
  }

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

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

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

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

  #cookie-banner {
    flex-direction: row;
  }

  #cookie-banner button {
    width: auto;
  }
}

@media (min-width: 1024px) {
  #product-description .grid-container {
    grid-template-columns: repeat(4, 1fr);
  }

  #benefits .grid-container {
    grid-template-columns: 1fr 1fr;
  }

  #mission-vision .grid-container {
    grid-template-columns: 1fr 1fr;
  }

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

  footer .grid-container {
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
  }
}