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

/* CSS Variables */
:root {
  /* Colors */
  --color-primary: #1E3A8A;
  --color-primary-light: #2563EB;
  --color-primary-dark: #1E3A8A;
  --color-accent: #F97316;
  --color-accent-light: #FB923C;
  --color-accent-dark: #EA580C;
  --color-white: #FFFFFF;
  --color-black: #000000;
  --color-gray-50: #F9FAFB;
  --color-gray-100: #F3F4F6;
  --color-gray-200: #E5E7EB;
  --color-gray-300: #D1D5DB;
  --color-gray-400: #9CA3AF;
  --color-gray-500: #6B7280;
  --color-gray-600: #4B5563;
  --color-gray-700: #374151;
  --color-gray-800: #1F2937;
  --color-gray-900: #111827;
  
  /* Typography */
  --font-family-heading: 'Inter', sans-serif;
  --font-family-body: 'Roboto', sans-serif;
  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-base: 1rem;    /* 16px */
  --font-size-lg: 1.125rem;  /* 18px */
  --font-size-xl: 1.25rem;   /* 20px */
  --font-size-2xl: 1.5rem;   /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */
  --font-size-4xl: 2.25rem;  /* 36px */
  --font-size-5xl: 3rem;     /* 48px */
  
  /* Spacing */
  --spacing-1: 0.25rem;  /* 4px */
  --spacing-2: 0.5rem;   /* 8px */
  --spacing-3: 0.75rem;  /* 12px */
  --spacing-4: 1rem;     /* 16px */
  --spacing-5: 1.25rem;  /* 20px */
  --spacing-6: 1.5rem;   /* 24px */
  --spacing-8: 2rem;     /* 32px */
  --spacing-10: 2.5rem;  /* 40px */
  --spacing-12: 3rem;    /* 48px */
  --spacing-16: 4rem;    /* 64px */
  --spacing-20: 5rem;    /* 80px */
  --spacing-24: 6rem;    /* 96px */
  
  /* Borders */
  --border-radius-sm: 0.125rem;  /* 2px */
  --border-radius: 0.25rem;      /* 4px */
  --border-radius-md: 0.375rem;  /* 6px */
  --border-radius-lg: 0.5rem;    /* 8px */
  --border-radius-xl: 0.75rem;   /* 12px */
  --border-radius-2xl: 1rem;     /* 16px */
  --border-radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --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;
  --transition-normal: 300ms;
  --transition-slow: 500ms;
  
  /* Container */
  --container-padding: 1rem;
  --container-max-width: 1200px;
}

/* Base Styles */
html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-body);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--color-gray-800);
  background-color: var(--color-white);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-4);
  color: var(--color-gray-900);
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

p {
  margin-bottom: var(--spacing-4);
}

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

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

ul, ol {
  margin-bottom: var(--spacing-4);
  padding-left: var(--spacing-6);
}

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

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

/* Utility Classes */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

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

/* Section Styles */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-12);
}

.section-title {
  margin-bottom: var(--spacing-4);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-white);
  box-shadow: var(--shadow);
  padding: var(--spacing-4) 0;
}

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

.logo img {
  height: auto;
  width: 250px;
  max-height: 80px;
}

.main-nav__list {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
}

.main-nav__item {
  margin-left: var(--spacing-6);
}

.main-nav__link {
  font-weight: 500;
  padding: var(--spacing-2) 0;
  position: relative;
}

.main-nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-normal) ease-in-out;
}

.main-nav__link:hover::after {
  width: 100%;
}

.header__contacts {
  display: flex;
  align-items: center;
}

.header__phone {
  font-weight: 700;
  margin-right: var(--spacing-4);
  color: var(--color-gray-900);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 30px;
  height: 24px;
  position: relative;
}

.mobile-menu-toggle span,
.mobile-menu-toggle span::before,
.mobile-menu-toggle span::after {
  position: absolute;
  width: 100%;
  height: 2px;
  background-color: var(--color-gray-900);
  transition: all var(--transition-fast) ease-in-out;
}

.mobile-menu-toggle span {
  top: 50%;
  transform: translateY(-50%);
}

.mobile-menu-toggle span::before,
.mobile-menu-toggle span::after {
  content: '';
  left: 0;
}

.mobile-menu-toggle span::before {
  top: -8px;
}

.mobile-menu-toggle span::after {
  bottom: -8px;
}

/* Hero Section */
.hero {
  padding: var(--spacing-16) 0;
  background-color: var(--color-gray-50);
  position: relative;
  overflow: hidden;
}

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

.hero__content {
  flex: 1;
  max-width: 600px;
}

.hero__title {
  font-size: var(--font-size-5xl);
  margin-bottom: var(--spacing-6);
  color: var(--color-primary-dark);
}

.hero__subtitle {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-8);
  color: var(--color-gray-700);
}

.hero__buttons {
  display: flex;
  gap: var(--spacing-4);
}

.hero__image {
  flex: 1;
  display: flex;
  justify-content: flex-end;
}

.hero__image img {
  max-width: 100%;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}

/* About Section */
.about {
  padding: var(--spacing-16) 0;
  background-color: var(--color-white);
}

.about__wrapper {
  display: flex;
  align-items: center;
  gap: var(--spacing-12);
}

.about__content {
  flex: 1;
}

.about__text {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-6);
}

.about__list {
  margin-bottom: var(--spacing-6);
}

.about__list li {
  margin-bottom: var(--spacing-2);
}

.about__image {
  flex: 1;
}

.about__image img {
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}

/* Guarantees Section */
.guarantees {
  padding: var(--spacing-16) 0;
  background-color: var(--color-primary-dark);
  color: var(--color-white);
}

.guarantees .section-title {
  color: var(--color-white);
}

.guarantees__wrapper {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-8);
}

.guarantees__item {
  display: flex;
  align-items: center;
  background-color: rgba(255, 255, 255, 0.1);
  padding: var(--spacing-6);
  border-radius: var(--border-radius-lg);
  transition: transform var(--transition-normal) ease-in-out;
}

.guarantees__item:hover {
  transform: translateY(-5px);
}

.guarantees__icon {
  margin-right: var(--spacing-4);
}

.guarantees__icon img {
  width: 64px;
  height: 64px;
}

.guarantees__title {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-2);
  color: var(--color-white);
}

.guarantees__value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-accent);
}

/* Services Section */
.services {
  padding: var(--spacing-16) 0;
  background-color: var(--color-gray-50);
}

.services__wrapper {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-8);
}

.service-card {
  background-color: var(--color-white);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-6);
  box-shadow: var(--shadow);
  transition: transform var(--transition-normal) ease-in-out, box-shadow var(--transition-normal) ease-in-out;
  height: 100%;
  display: flex;
  flex-direction: column;
}

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

.service-card__icon {
  margin-bottom: var(--spacing-4);
  display: flex;
  justify-content: center;
}

.service-card__icon img {
  width: 80px;
  height: 80px;
}

.service-card__title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-4);
  text-align: center;
}

.service-card__text {
  margin-bottom: var(--spacing-6);
  flex-grow: 1;
}

.service-card__more {
  align-self: flex-start;
  background: none;
  border: none;
  color: var(--color-primary);
  font-weight: 500;
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  transition: color var(--transition-fast) ease-in-out;
}

.service-card__more:hover {
  color: var(--color-primary-light);
}

.service-card__more::after {
  content: '→';
  margin-left: var(--spacing-2);
  transition: transform var(--transition-fast) ease-in-out;
}

.service-card__more:hover::after {
  transform: translateX(4px);
}

.service-card__details {
  display: none;
  margin-top: var(--spacing-4);
  padding-top: var(--spacing-4);
  border-top: 1px solid var(--color-gray-200);
}

.service-card__details.active {
  display: block;
}

/* Benefits Section */
.benefits {
  padding: var(--spacing-16) 0;
  background-color: var(--color-white);
}

.benefits__wrapper {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-8);
}

.benefit-card {
  text-align: center;
  padding: var(--spacing-6);
  border-radius: var(--border-radius-lg);
  transition: transform var(--transition-normal) ease-in-out;
}

.benefit-card:hover {
  transform: translateY(-5px);
}

.benefit-card__icon {
  margin-bottom: var(--spacing-4);
  display: flex;
  justify-content: center;
}

.benefit-card__icon img {
  width: 80px;
  height: 80px;
}

.benefit-card__title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-4);
  color: var(--color-primary-dark);
}

/* Pricing Section */
.pricing {
  padding: var(--spacing-16) 0;
  background-color: var(--color-gray-50);
}

.pricing__wrapper {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-8);
}

.pricing-card {
  background-color: var(--color-white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform var(--transition-normal) ease-in-out, box-shadow var(--transition-normal) ease-in-out;
  position: relative;
}

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

.pricing-card--popular {
  border: 2px solid var(--color-accent);
  transform: scale(1.05);
}

.pricing-card--popular:hover {
  transform: scale(1.05) translateY(-5px);
}

.pricing-card__badge {
  position: absolute;
  top: var(--spacing-4);
  right: var(--spacing-4);
  background-color: var(--color-accent);
  color: var(--color-white);
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.pricing-card__header {
  padding: var(--spacing-6);
  background-color: var(--color-primary-dark);
  color: var(--color-white);
  text-align: center;
}

.pricing-card__title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-2);
  color: var(--color-white);
}

.pricing-card__price {
  margin-bottom: var(--spacing-2);
}

.pricing-card__amount {
  font-size: var(--font-size-3xl);
  font-weight: 700;
}

.pricing-card__period {
  font-size: var(--font-size-sm);
  opacity: 0.8;
}

.pricing-card__body {
  padding: var(--spacing-6);
}

.pricing-card__description {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-4);
  text-align: center;
  color: var(--color-gray-700);
}

.pricing-card__features {
  list-style: none;
  padding: 0;
  margin-bottom: var(--spacing-6);
}

.pricing-card__features li {
  padding: var(--spacing-2) 0;
  border-bottom: 1px solid var(--color-gray-200);
  display: flex;
  align-items: center;
}

.pricing-card__features li::before {
  content: '✓';
  color: var(--color-primary);
  margin-right: var(--spacing-2);
  font-weight: 700;
}

.pricing-card__footer {
  padding: var(--spacing-6);
  text-align: center;
}

/* Contact Section */
.contact {
  padding: var(--spacing-16) 0;
  background-color: var(--color-white);
}

.contact__wrapper {
  max-width: 600px;
  margin: 0 auto;
}

.contact-form {
  background-color: var(--color-gray-50);
  padding: var(--spacing-8);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: var(--spacing-4);
}

.form-control {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast) ease-in-out, box-shadow var(--transition-fast) ease-in-out;
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Map Section */
.map {
  height: 400px;
}

/* Footer */
.footer {
  background-color: var(--color-gray-900);
  color: var(--color-white);
  padding: var(--spacing-12) 0 var(--spacing-6);
}

.footer__wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-8);
}

.footer-nav__list {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-nav__item {
  margin-right: var(--spacing-6);
}

.footer-nav__link {
  color: var(--color-gray-300);
  transition: color var(--transition-fast) ease-in-out;
}

.footer-nav__link:hover {
  color: var(--color-white);
}

.footer__phone {
  color: var(--color-white);
  font-weight: 700;
  margin-bottom: var(--spacing-2);
  display: block;
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-6);
  border-top: 1px solid var(--color-gray-800);
}

.footer__copyright {
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
  margin: 0;
}

.footer__policy {
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast) ease-in-out;
  margin-right: var(--spacing-4);
}

.footer__policy:hover {
  color: var(--color-white);
}

.footer__download {
  color: var(--color-accent);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: color var(--transition-fast) ease-in-out;
}

.footer__download:hover {
  color: var(--color-accent-light);
}

.footer__links {
  display: flex;
  align-items: center;
}

/* Button Styles */
.btn {
  display: inline-block;
  font-weight: 500;
  text-align: center;
  white-space: nowrap;
  vertical-align: middle;
  user-select: none;
  border: 1px solid transparent;
  padding: var(--spacing-3) var(--spacing-6);
  font-size: var(--font-size-base);
  line-height: 1.5;
  border-radius: var(--border-radius);
  transition: all var(--transition-fast) ease-in-out;
  cursor: pointer;
}

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

.btn--primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-white);
}

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

.btn--secondary:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  color: var(--color-white);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

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

/* Responsive Styles */
@media (max-width: 1200px) {
  .hero__title {
    font-size: var(--font-size-4xl);
  }
}

@media (max-width: 992px) {
  .hero__wrapper {
    flex-direction: column;
    text-align: center;
  }
  
  .hero__content {
    margin-bottom: var(--spacing-8);
    max-width: 100%;
  }
  
  .hero__buttons {
    justify-content: center;
  }
  
  .about__wrapper {
    flex-direction: column;
  }
  
  .about__content {
    order: 2;
  }
  
  .about__image {
    order: 1;
    margin-bottom: var(--spacing-8);
  }
  
  .footer__wrapper {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .footer__logo {
    margin-bottom: var(--spacing-6);
  }
  
  .footer-nav {
    margin-bottom: var(--spacing-6);
  }
  
  .footer-nav__list {
    flex-wrap: wrap;
  }
  
  .footer-nav__item {
    margin-bottom: var(--spacing-4);
  }
}

@media (max-width: 768px) {
  .header__wrapper {
    position: relative;
  }
  
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--color-white);
    box-shadow: var(--shadow);
    padding: var(--spacing-4);
  }
  
  .main-nav.active {
    display: block;
  }
  
  .main-nav__list {
    flex-direction: column;
  }
  
  .main-nav__item {
    margin: 0;
    margin-bottom: var(--spacing-4);
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .header__contacts {
    display: none;
  }
  
  .hero__title {
    font-size: var(--font-size-3xl);
  }
  
  .hero__subtitle {
    font-size: var(--font-size-lg);
  }
  
  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .footer__copyright {
    margin-bottom: var(--spacing-4);
  }
}

@media (max-width: 576px) {
  .hero__buttons {
    flex-direction: column;
    gap: var(--spacing-4);
  }
  
  .hero__title {
    font-size: var(--font-size-2xl);
  }
  
  .section-title {
    font-size: var(--font-size-2xl);
  }
  
  .section-subtitle {
    font-size: var(--font-size-base);
  }
  
  .about__text {
    font-size: var(--font-size-base);
  }
  
  .pricing-card__amount {
    font-size: var(--font-size-2xl);
  }
}