:root {
  --font-family-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji",
    "Segoe UI Symbol";
  --font-family-serif: "Georgia", "Times New Roman", serif;

  /* Light Theme */
  --color-background: #f9fafb;
  --color-surface: #ffffff;
  --color-primary: #1f2937;
  --color-secondary: #4b5563;
  --color-accent: #3b82f6;
  --color-accent-hover: #2563eb;
  --color-border: #e5e7eb;
  --color-text-on-accent: #ffffff;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2.5rem;
  --spacing-xxl: 4rem;

  /* Typography */
  --font-size-base: 16px;
  --font-size-sm: clamp(0.8rem, 0.17vw + 0.76rem, 0.89rem);
  --font-size-md: clamp(1rem, 0.34vw + 0.91rem, 1.19rem);
  --font-size-lg: clamp(1.25rem, 0.61vw + 1.1rem, 1.58rem);
  --font-size-xl: clamp(1.56rem, 1vw + 1.31rem, 2.11rem);
  --font-size-xxl: clamp(1.95rem, 1.56vw + 1.56rem, 2.81rem);
  --font-size-xxxl: clamp(2.44rem, 2.38vw + 1.85rem, 3.75rem);

  /* Other */
  --border-radius-sm: 0.25rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 0.75rem;
  --transition-speed: 0.3s;
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -2px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
  --color-background: #111827;
  --color-surface: #1f2937;
  --color-primary: #f9fafb;
  --color-secondary: #9ca3af;
  --color-accent: #60a5fa;
  --color-accent-hover: #3b82f6;
  --color-border: #374151;
  --color-text-on-accent: #111827;
}

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family-sans);
  background-color: var(--color-background);
  color: var(--color-secondary);
  line-height: 1.6;
  transition: background-color var(--transition-speed) ease,
    color var(--transition-speed) ease;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--color-primary);
  font-weight: 700;
  line-height: 1.2;
}

h1 {
  font-size: var(--font-size-xxxl);
}
h2 {
  font-size: var(--font-size-xxl);
}
h3 {
  font-size: var(--font-size-xl);
}
h4 {
  font-size: var(--font-size-lg);
}

p {
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-md);
}

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

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

ul {
  list-style: none;
}

section {
  padding-top: var(--spacing-xxl);
  padding-bottom: var(--spacing-xxl);
}

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

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

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

.button {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-weight: 600;
  font-size: var(--font-size-md);
  text-align: center;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: background-color var(--transition-speed) ease,
    transform var(--transition-speed) ease;
  border: 1px solid transparent;
}

.button:hover {
  transform: translateY(-2px);
}

.button--primary {
  background-color: var(--color-primary);
  color: var(--color-surface);
  border-color: var(--color-primary);
}
[data-theme="dark"] .button--primary:hover {
  background-color: var(--color-secondary);
}

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

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

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

.button--white {
  background-color: #ffffff;
  color: #111827;
}

.site-header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background-color var(--transition-speed) ease,
    border-color var(--transition-speed) ease;
}

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

.logo-link {
  font-size: var(--font-size-lg);
  font-weight: 800;
  color: var(--color-primary);
}

.navigation__list {
  display: flex;
  gap: var(--spacing-lg);
}

.navigation__link {
  color: var(--color-secondary);
  font-weight: 500;
  position: relative;
  padding: var(--spacing-xs) 0;
}

.navigation__link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width var(--transition-speed) ease;
}

.navigation__link:hover::after {
  width: 100%;
}
.navigation__link:hover {
  color: var(--color-primary);
}

.hero-section {
  text-align: center;
  padding-top: var(--spacing-xxl);
  padding-bottom: var(--spacing-xxl);
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

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

.hero-subtitle {
  font-size: var(--font-size-lg);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--spacing-xl);
}

.product-features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.feature-card {
  background-color: var(--color-surface);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-border);
  text-align: center;
  transition: transform var(--transition-speed) ease,
    box-shadow var(--transition-speed) ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

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

.feature-card__icon .icon-svg {
  width: 48px;
  height: 48px;
  color: var(--color-accent);
}

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

.advantages-section {
  background-color: var(--color-surface);
}

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

.advantage-item {
  padding-left: var(--spacing-lg);
  border-left: 3px solid var(--color-accent);
}

.case-studies-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

.case-study-card {
  background-color: var(--color-surface);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-border);
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.case-study-card__quote {
  font-family: var(--font-family-serif);
  font-style: italic;
  margin-bottom: var(--spacing-lg);
  flex-grow: 1;
}

.case-study-card__author {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.author-icon .icon-svg {
  width: 40px;
  height: 40px;
  color: var(--color-secondary);
}

.author-name {
  display: block;
  font-weight: 600;
  color: var(--color-primary);
}

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

.mission-vision-section {
  background-color: var(--color-surface);
}

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

@media (min-width: 768px) {
  .mission-vision-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.mission-item,
.vision-item {
  text-align: center;
  padding: var(--spacing-lg);
}

.mission-item__icon,
.vision-item__icon {
  margin-bottom: var(--spacing-md);
}
.mission-item__icon .icon-svg,
.vision-item__icon .icon-svg {
  width: 56px;
  height: 56px;
  color: var(--color-accent);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.team-member-card {
  text-align: center;
}

.team-member-card__icon-wrapper {
  width: 100px;
  height: 100px;
  margin: 0 auto var(--spacing-md);
  border-radius: 50%;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  display: flex;
  justify-content: center;
  align-items: center;
}

.team-member-card__icon {
  width: 48px;
  height: 48px;
  color: var(--color-secondary);
}

.team-member-card__name {
  font-size: var(--font-size-lg);
}

.team-member-card__role {
  font-size: var(--font-size-sm);
  color: var(--color-accent);
}

.testimonials-section {
  background-color: var(--color-surface);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

.testimonial-card {
  background-color: var(--color-background);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-lg);
  border: 1px solid var(--color-border);
}

.testimonial-card__text {
  margin-bottom: var(--spacing-md);
}
.testimonial-card__author .author-name {
  font-style: italic;
}

.faq-accordion {
  max-width: 800px;
  margin: 0 auto;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}
.faq-item:last-child {
  border-bottom: none;
}
.faq-item__question {
  width: 100%;
  text-align: left;
  padding: var(--spacing-lg);
  cursor: pointer;
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: var(--color-primary);
  position: relative;
  list-style: none;
}
.faq-item__question::-webkit-details-marker {
  display: none;
}
.faq-item__question::after {
  content: "+";
  position: absolute;
  right: var(--spacing-lg);
  top: 50%;
  transform: translateY(-50%);
  font-size: var(--font-size-xl);
  color: var(--color-secondary);
  transition: transform var(--transition-speed) ease;
}
.faq-item[open] .faq-item__question::after {
  transform: translateY(-50%) rotate(45deg);
}

.faq-item__answer {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  background-color: var(--color-surface);
}

.faq-more-link {
  text-align: center;
  margin-top: var(--spacing-xl);
}

.link-styled {
  font-weight: 500;
}

.cta-section {
  background-color: var(--color-primary);
  color: var(--color-background);
  text-align: center;
}

.cta-title {
  color: var(--color-background);
}

.cta-text {
  max-width: 600px;
  margin: var(--spacing-md) auto var(--spacing-xl);
}

.site-footer {
  background-color: var(--color-surface);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-column__title {
  margin-bottom: var(--spacing-md);
  color: var(--color-primary);
}

.footer-link-list__item {
  margin-bottom: var(--spacing-sm);
}

.footer-link {
  color: var(--color-secondary);
}

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

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
  text-align: center;
  font-size: var(--font-size-sm);
}

.cookie-consent-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: var(--color-surface);
  padding: var(--spacing-md);
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  border-top: 1px solid var(--color-border);
}

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

.cookie-consent-text a {
  text-decoration: underline;
}

@media (max-width: 768px) {
  .navigation {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  .navigation__list {
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
  }
  .navigation__action {
    margin-top: var(--spacing-sm);
  }
  .cookie-consent-content {
    flex-direction: column;
    text-align: center;
  }
}

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

.animated-element.is-visible {
  opacity: 1;
  transform: translateY(0);
}