:root {
  /* Основные цвета */
  --color-primary: #4a5fe9;
  --color-primary-dark: #3443c4;
  --color-secondary: #ff7b54;
  --color-secondary-dark: #e05e3a;
  --color-tertiary: #1ecbe1;
  --color-tertiary-dark: #12a8bd;
  --color-success: #48d1aa;
  --color-success-dark: #34b792;
  --color-warning: #ffcf5c;
  --color-warning-dark: #e0b03f;
  --color-danger: #ff5a5a;
  --color-danger-dark: #e03f3f;
  
  /* Нейтральные цвета */
  --color-white: #ffffff;
  --color-light: #f5f7ff;
  --color-light-gray: #e6eaff;
  --color-gray: #c4c9e1;
  --color-dark-gray: #767b95;
  --color-dark: #2e3254;
  --color-black: #1a1c33;
  
  /* Фоны и тени */
  --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-tertiary));
  --gradient-secondary: linear-gradient(135deg, var(--color-secondary), var(--color-warning));
  --shadow-small: 4px 4px 10px rgba(0, 0, 0, 0.05), -4px -4px 10px rgba(255, 255, 255, 0.8);
  --shadow-medium: 8px 8px 20px rgba(0, 0, 0, 0.07), -8px -8px 20px rgba(255, 255, 255, 0.8);
  --shadow-large: 15px 15px 30px rgba(0, 0, 0, 0.1), -15px -15px 30px rgba(255, 255, 255, 0.8);
  --shadow-inset: inset 4px 4px 10px rgba(0, 0, 0, 0.05), inset -4px -4px 10px rgba(255, 255, 255, 0.8);
  
  /* Текстовые стили */
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Merriweather', serif;
  
  /* Размеры и радиусы */
  --border-radius-small: 8px;
  --border-radius-medium: 12px;
  --border-radius-large: 20px;
  --border-radius-circle: 50%;
  
  /* Анимации */
  --transition-fast: 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-medium: 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-slow: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  
  /* Разметка */
  --container-padding: 1.5rem;
  --section-spacing: 5rem;
  --grid-gap: 2rem;
}

/* ======= BASE STYLES ======= */
*, *::before, *::after {
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-body);
  line-height: 1.6;
  color: var(--color-dark);
  background-color: var(--color-light);
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  margin-top: 0;
  line-height: 1.2;
  color: var(--color-black);
  font-weight: 600;
}

h1 {
  font-size: 2.75rem;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 2.25rem;
  margin-bottom: 1.25rem;
}

h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

h4 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1.5rem;
  color: var(--color-dark);
}

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

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

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

ul, ol {
  padding-left: 1.5rem;
}

/* ======= UTILITY CLASSES ======= */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section-title {
  text-align: center;
  position: relative;
  margin-bottom: 3rem;
  font-weight: 700;
}

.section-title::after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: var(--border-radius-small);
  margin: 1rem auto 0;
}

/* ======= BUTTON STYLES ======= */
.btn, 
button,
input[type='submit'] {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 1rem;
  padding: 0.875rem 1.75rem;
  border-radius: var(--border-radius-medium);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-medium);
  border: none;
  box-shadow: var(--shadow-small);
  background-color: var(--color-white);
  color: var(--color-dark);
  text-decoration: none;
}

.btn:hover, 
button:hover,
input[type='submit']:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-medium);
  text-decoration: none;
}

.btn:active, 
button:active,
input[type='submit']:active {
  transform: translateY(1px);
  box-shadow: var(--shadow-small);
}

.btn.primary {
  background: var(--gradient-primary);
  color: var(--color-white);
}

.btn.secondary {
  background: var(--gradient-secondary);
  color: var(--color-white);
}

/* ======= HEADER STYLES ======= */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: var(--color-white);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  padding: 1rem 0;
}

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

.logo a {
  text-decoration: none;
}

.logo h1 {
  font-size: 1.75rem;
  margin: 0;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
}

.desktop-nav {
  display: none;
}

.desktop-nav ul {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}

.desktop-nav li {
  margin-left: 2rem;
}

.desktop-nav a {
  color: var(--color-dark);
  font-family: var(--font-heading);
  font-weight: 500;
  position: relative;
}

.desktop-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -5px;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-medium);
}

.desktop-nav a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.desktop-nav a:hover::after {
  width: 100%;
}

.mobile-menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 21px;
  cursor: pointer;
}

.mobile-menu-toggle span {
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--color-primary);
  border-radius: 3px;
  transition: all var(--transition-fast);
}

.mobile-nav {
  display: none;
  padding: 1rem 0;
}

.mobile-nav.open {
  display: block;
}

.mobile-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mobile-nav li {
  margin-bottom: 1rem;
}

.mobile-nav a {
  display: block;
  color: var(--color-dark);
  font-family: var(--font-heading);
  font-weight: 500;
  padding: 0.5rem 0;
}

/* ======= HERO SECTION ======= */
.hero {
  position: relative;
  padding: 8rem 0 5rem;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: var(--color-white);
  text-align: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5));
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  color: var(--color-white);
  font-size: 3rem;
  margin-bottom: 1.5rem;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero p {
  color: var(--color-white);
  font-size: 1.25rem;
  margin-bottom: 2rem;
  text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}

.hero-buttons {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  justify-content: center;
  align-items: center;
}

/* ======= VISION SECTION ======= */
.vision {
  padding: var(--section-spacing) 0;
  background-color: var(--color-white);
}

.vision-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--grid-gap);
}

.vision-text {
  flex: 1;
}

.vision-image {
  flex: 1;
  border-radius: var(--border-radius-large);
  overflow: hidden;
  box-shadow: var(--shadow-medium);
}

.vision-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-medium);
}

.vision-image:hover img {
  transform: scale(1.05);
}

/* ======= PORTFOLIO SECTION ======= */
.portfolio {
  padding: var(--section-spacing) 0;
  background-color: var(--color-light);
}

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

.card {
  display: flex;
  flex-direction: column;
  align-items: center;
  background-color: var(--color-white);
  border-radius: var(--border-radius-large);
  overflow: hidden;
  box-shadow: var(--shadow-small);
  transition: all var(--transition-medium);
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-medium);
}

.card-image {
  width: 100%;
  height: 250px;
  overflow: hidden;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-medium);
}

.card:hover .card-image img {
  transform: scale(1.05);
}

.card-content {
  padding: 1.5rem;
  text-align: center;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.card-content h3 {
  margin-bottom: 0.75rem;
  color: var(--color-black);
}

.card-content p {
  margin-bottom: 1.5rem;
}

.card-content .btn {
  margin-top: auto;
}

/* ======= INSIGHTS SECTION ======= */
.insights {
  padding: var(--section-spacing) 0;
  background-color: var(--color-white);
}

.insights-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--grid-gap);
}

.insights-image {
  flex: 1;
  border-radius: var(--border-radius-large);
  overflow: hidden;
  box-shadow: var(--shadow-medium);
}

.insights-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-medium);
}

.insights-image:hover img {
  transform: scale(1.05);
}

.insights-text {
  flex: 1;
}

/* ======= RESOURCES SECTION ======= */
.resources {
  padding: var(--section-spacing) 0;
  background-color: var(--color-light);
}

.resources-intro {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 3rem;
}

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

.resource-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  background-color: var(--color-white);
  border-radius: var(--border-radius-large);
  overflow: hidden;
  box-shadow: var(--shadow-small);
  transition: all var(--transition-medium);
  padding: 1.5rem;
  text-align: center;
  text-decoration: none;
  color: var(--color-dark);
}

.resource-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-medium);
  text-decoration: none;
}

.resource-image {
  width: 100%;
  height: 200px;
  overflow: hidden;
  border-radius: var(--border-radius-medium);
  margin-bottom: 1.25rem;
}

.resource-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-medium);
}

.resource-card:hover .resource-image img {
  transform: scale(1.05);
}

.resource-card h3 {
  margin-bottom: 0.5rem;
  transition: color var(--transition-fast);
}

.resource-card:hover h3 {
  color: var(--color-primary);
}

.resource-card p {
  margin-bottom: 0;
}

/* ======= PRICING SECTION ======= */
.pricing {
  padding: var(--section-spacing) 0;
  background-color: var(--color-white);
}

.pricing-intro {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 3rem;
}

.pricing-cards {
  display: flex;
  flex-direction: column;
  gap: var(--grid-gap);
}

.pricing-card {
  flex: 1;
  background-color: var(--color-white);
  border-radius: var(--border-radius-large);
  padding: 2rem;
  box-shadow: var(--shadow-small);
  transition: all var(--transition-medium);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.pricing-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-medium);
}

.pricing-card.featured {
  box-shadow: var(--shadow-medium);
  border: 2px solid var(--color-primary);
}

.featured-label {
  position: absolute;
  top: 0;
  right: 0;
  background: var(--gradient-primary);
  color: var(--color-white);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.5rem 1.5rem;
  transform: rotate(45deg) translateX(3.5rem) translateY(-1.5rem);
  width: 200px;
  text-align: center;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.pricing-card h3 {
  margin-bottom: 0.5rem;
}

.price {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 2rem;
}

.pricing-card ul {
  list-style: none;
  padding: 0;
  margin-bottom: 2rem;
}

.pricing-card li {
  margin-bottom: 0.75rem;
  position: relative;
  padding-left: 1.5rem;
}

.pricing-card li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: bold;
}

/* ======= SUSTAINABILITY SECTION ======= */
.sustainability {
  padding: var(--section-spacing) 0;
  background-color: var(--color-light);
}

.sustainability-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--grid-gap);
}

.sustainability-text {
  flex: 1;
}

.sustainability-image {
  flex: 1;
  border-radius: var(--border-radius-large);
  overflow: hidden;
  box-shadow: var(--shadow-medium);
}

.sustainability-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-medium);
}

.sustainability-image:hover img {
  transform: scale(1.05);
}

/* ======= HISTORY SECTION ======= */
.history {
  padding: var(--section-spacing) 0;
  background-color: var(--color-white);
}

.history-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--grid-gap);
}

.history-image {
  flex: 1;
  border-radius: var(--border-radius-large);
  overflow: hidden;
  box-shadow: var(--shadow-medium);
}

.history-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-medium);
}

.history-image:hover img {
  transform: scale(1.05);
}

.history-text {
  flex: 1;
}

/* ======= FAQ SECTION ======= */
.faq {
  padding: var(--section-spacing) 0;
  background-color: var(--color-light);
}

.accordion {
  margin-top: 2rem;
}

.accordion-item {
  background-color: var(--color-white);
  border-radius: var(--border-radius-medium);
  box-shadow: var(--shadow-small);
  margin-bottom: 1rem;
  overflow: hidden;
}

.accordion-header {
  padding: 1.5rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.accordion-header h3 {
  margin: 0;
  font-size: 1.25rem;
  transition: color var(--transition-fast);
}

.accordion-icon {
  font-family: monospace;
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--color-primary);
  transition: transform var(--transition-medium);
}

.accordion-item.active .accordion-icon {
  transform: rotate(45deg);
}

.accordion-item:hover .accordion-header h3 {
  color: var(--color-primary);
}

.accordion-body {
  padding: 0 1.5rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-medium), padding var(--transition-medium);
}

.accordion-item.active .accordion-body {
  padding-bottom: 1.5rem;
  max-height: 500px; /* Adjust based on content */
}

/* ======= CONTACT SECTION ======= */
.contact {
  padding: var(--section-spacing) 0;
  background-color: var(--color-white);
}

.contact-content {
  display: flex;
  flex-direction: column;
  gap: var(--grid-gap);
}

.contact-info, .contact-form {
  flex: 1;
  background-color: var(--color-white);
  border-radius: var(--border-radius-large);
  padding: 2rem;
  box-shadow: var(--shadow-small);
}

.info-item {
  margin-bottom: 1rem;
  display: flex;
  flex-direction: column;
}

.info-label {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

.map {
  margin-top: 2rem;
  border-radius: var(--border-radius-medium);
  overflow: hidden;
  box-shadow: var(--shadow-small);
}

.map img {
  width: 100%;
  height: auto;
  display: block;
}

.form-group {
  margin-bottom: 1.5rem;
}

label {
  display: block;
  font-family: var(--font-heading);
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--color-dark);
}

input[type="text"], 
input[type="email"], 
input[type="tel"], 
select, 
textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--color-light-gray);
  border-radius: var(--border-radius-medium);
  font-family: var(--font-body);
  font-size: 1rem;
  background-color: var(--color-white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input[type="text"]:focus, 
input[type="email"]:focus, 
input[type="tel"]:focus, 
select:focus, 
textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(74, 95, 233, 0.2);
}

.checkbox-wrapper {
  display: flex;
  align-items: flex-start;
}

.checkbox-wrapper input[type="checkbox"] {
  margin-top: 0.25rem;
  margin-right: 0.75rem;
}

/* ======= FOOTER STYLES ======= */
.footer {
  padding: 4rem 0 2rem;
  background-color: var(--color-dark);
  color: var(--color-white);
}

.footer-content {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.footer-column {
  flex: 1;
}

.footer-logo h3 {
  color: var(--color-white);
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

.footer h4 {
  color: var(--color-white);
  margin-bottom: 1.5rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.footer h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 40px;
  height: 3px;
  background: var(--gradient-primary);
}

.footer p {
  color: var(--color-light-gray);
}

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

.footer li {
  margin-bottom: 0.75rem;
}

.footer a {
  color: var(--color-light-gray);
  transition: color var(--transition-fast);
}

.footer a:hover {
  color: var(--color-white);
  text-decoration: none;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.social-links a {
  display: inline-block;
  color: var(--color-white);
  padding: 0.5rem;
  border-radius: var(--border-radius-circle);
  background: rgba(255, 255, 255, 0.1);
  transition: all var(--transition-fast);
}

.social-links a:hover {
  background: var(--gradient-primary);
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.footer-bottom {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.footer-bottom p {
  margin: 0;
  color: var(--color-gray);
  font-size: 0.875rem;
}

/* ======= SUCCESS PAGE ======= */
.success-page {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 2rem;
}

.success-content {
  max-width: 600px;
}

.success-icon {
  font-size: 5rem;
  color: var(--color-success);
  margin-bottom: 1.5rem;
}

/* ======= PRIVACY & TERMS PAGES ======= */
.privacy-content, .terms-content {
  padding-top: 100px;
  max-width: 800px;
  margin: 0 auto;
  padding-bottom: 4rem;
}

/* ======= MEDIA QUERIES ======= */
@media (min-width: 576px) {
  .hero-buttons {
    flex-direction: row;
    justify-content: center;
  }
}

@media (min-width: 768px) {
  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .resources-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .vision-content,
  .insights-content,
  .sustainability-content,
  .history-content {
    flex-direction: row;
  }

  .sustainability-content,
  .history-content {
    align-items: flex-start;
  }
  
  .pricing-cards {
    flex-direction: row;
  }
  
  .contact-content {
    flex-direction: row;
  }
}

@media (min-width: 992px) {
  .mobile-menu-toggle {
    display: none;
  }
  
  .desktop-nav {
    display: block;
  }
  
  .portfolio-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .resources-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .footer-content {
    flex-direction: row;
  }
}

/* ======= ANIMATIONS ======= */
[data-aos] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
}

[data-aos="fade-up"] {
  transform: translateY(30px);
}

[data-aos="fade-down"] {
  transform: translateY(-30px);
}

[data-aos="fade-left"] {
  transform: translateX(30px);
}

[data-aos="fade-right"] {
  transform: translateX(-30px);
}

[data-aos="zoom-in"] {
  transform: scale(0.9);
}

[data-aos="flip-left"] {
  transform: rotateY(25deg);
}

[data-aos].aos-animate {
  opacity: 1;
  transform: translate(0) rotate(0) scale(1);
}