/* ==========================================================================
   Kite76 - Modern CSS
   Версия: 2.0
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables (Custom Properties)
   -------------------------------------------------------------------------- */
:root {
  /* Цветовая палитра */
  --color-primary: #006DB8;
  --color-primary-dark: #005a96;
  --color-primary-light: #3d9fd8;
  --color-secondary: #0E4687;
  --color-accent: #FF6B35;
  --color-accent-hover: #e55a2b;
  
  /* Нейтральные цвета */
  --color-white: #ffffff;
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;
  --color-gray-900: #0f172a;
  --color-black: #000000;
  
  /* Семантические цвета */
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;
  
  /* Типографика */
  --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 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 */
  
  --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;
  
  /* Отступы */
  --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 */
  
  /* Границы */
  --border-radius-sm: 0.25rem;
  --border-radius-md: 0.375rem;
  --border-radius-lg: 0.5rem;
  --border-radius-xl: 0.75rem;
  --border-radius-2xl: 1rem;
  --border-radius-full: 9999px;
  
  /* Тени */
  --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);
  
  /* Переходы */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;
  
  /* Контейнер */
  --container-max-width: 1200px;
  --container-padding: var(--spacing-4);
  
  /* Z-index */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal: 400;
  --z-tooltip: 500;
}

/* --------------------------------------------------------------------------
   Reset & Base Styles
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-gray-800);
  background-color: var(--color-gray-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

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

h4 {
  font-size: var(--font-size-xl);
}

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: var(--font-size-base);
}

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

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

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

strong, b {
  font-weight: var(--font-weight-semibold);
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.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);
}

.section {
  padding-top: var(--spacing-16);
  padding-bottom: var(--spacing-16);
}

.section--gray {
  background-color: var(--color-gray-100);
}

/* --------------------------------------------------------------------------
   Skip Link (Accessibility)
   -------------------------------------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-3) var(--spacing-4);
  z-index: var(--z-tooltip);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
}

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

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.header__logo img {
  height: 50px;
  width: auto;
}

.header__logo-text {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.nav {
  display: none;
}

.nav__list {
  display: flex;
  gap: var(--spacing-6);
  list-style: none;
}

.nav__link {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
  padding: var(--spacing-2) 0;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  text-decoration: none;
}

/* Mobile menu button */
.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-2);
}

.nav-toggle__bar {
  width: 24px;
  height: 2px;
  background-color: var(--color-gray-700);
  transition: all var(--transition-fast);
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: var(--color-white);
  overflow: hidden;
}

.hero__background {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__background img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.hero__title {
  font-size: var(--font-size-4xl);
  color: var(--color-white);
  margin-bottom: var(--spacing-6);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero__subtitle {
  font-size: var(--font-size-xl);
  opacity: 0.9;
  margin-bottom: var(--spacing-8);
  line-height: var(--line-height-relaxed);
}

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

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--border-radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.btn--primary:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  text-decoration: none;
}

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

.btn--secondary:hover {
  background-color: var(--color-white);
  color: var(--color-primary);
  text-decoration: none;
}

.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);
  text-decoration: none;
}

.btn--lg {
  padding: var(--spacing-4) var(--spacing-8);
  font-size: var(--font-size-lg);
}

/* --------------------------------------------------------------------------
   Features Grid
   -------------------------------------------------------------------------- */
.features {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-8);
}

.feature-card {
  background-color: var(--color-white);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-8);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

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

.feature-card__icon {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary-light);
  color: var(--color-white);
  border-radius: var(--border-radius-lg);
  margin-bottom: var(--spacing-4);
  font-size: var(--font-size-2xl);
}

.feature-card__title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-3);
}

.feature-card__text {
  color: var(--color-gray-600);
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   About Section
   -------------------------------------------------------------------------- */
.about__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-12);
  align-items: center;
}

.about__image {
  border-radius: var(--border-radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

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

.about__list {
  list-style: none;
  margin-top: var(--spacing-6);
}

.about__list li {
  position: relative;
  padding-left: var(--spacing-8);
  margin-bottom: var(--spacing-4);
  color: var(--color-gray-700);
}

.about__list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: var(--font-weight-bold);
}
.about__content ol {
  margin-left: 40px;
  margin-bottom: 20px;
}

/* --------------------------------------------------------------------------
   Video Section
   -------------------------------------------------------------------------- */
.videos__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-6);
}

.video-card {
  position: relative;
  border-radius: var(--border-radius-xl);
  overflow: hidden;
  background-color: var(--color-gray-900);
  aspect-ratio: 16 / 9;
}

.video-card iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* --------------------------------------------------------------------------
   Brands Section
   -------------------------------------------------------------------------- */
.brands__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-6);
  align-items: center;
}

.brand-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-4);
  background-color: var(--color-white);
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-fast);
}

.brand-logo:hover {
  box-shadow: var(--shadow-md);
}

.brand-logo img {
  max-width: 120px;
  height: auto;
  filter: grayscale(100%);
  opacity: 0.7;
  transition: all var(--transition-fast);
}

.brand-logo:hover img {
  filter: grayscale(0%);
  opacity: 1;
}

/* --------------------------------------------------------------------------
   FAQ Section
   -------------------------------------------------------------------------- */
.faq__list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--color-white);
  border-radius: var(--border-radius-lg);
  margin-bottom: var(--spacing-4);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.faq-item__question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-5) var(--spacing-6);
  background: none;
  border: none;
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  text-align: left;
  color: var(--color-gray-800);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.faq-item__question:hover {
  background-color: var(--color-gray-50);
}

.faq-item__icon {
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  transition: transform var(--transition-fast);
}

.faq-item--open .faq-item__icon {
  transform: rotate(45deg);
}

.faq-item__answer {
  display: none;
  padding: 0 var(--spacing-6) var(--spacing-5);
  color: var(--color-gray-600);
}

.faq-item--open .faq-item__answer {
  display: block;
}

/* --------------------------------------------------------------------------
   Contact Section
   -------------------------------------------------------------------------- */
.contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-8);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
}

.contact-info__item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-4);
}

.contact-info__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary-light);
  color: var(--color-white);
  border-radius: var(--border-radius-lg);
  flex-shrink: 0;
}

.contact-info__label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-1);
}

.contact-info__value {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-800);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  background-color: var(--color-gray-900);
  color: var(--color-gray-300);
  padding-top: var(--spacing-16);
  padding-bottom: var(--spacing-8);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-12);
}

.footer__brand {
  max-width: 300px;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-4);
}

.footer__logo img {
  height: 40px;
  width: auto;
}

.footer__logo-text {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
}

.footer__description {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  margin-bottom: var(--spacing-4);
}

.footer__title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-white);
  margin-bottom: var(--spacing-4);
}

.footer__links {
  list-style: none;
}

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

.footer__links a {
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

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

.footer__social {
  display: flex;
  gap: var(--spacing-3);
}

.footer__social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-gray-800);
  color: var(--color-gray-400);
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-fast);
}

.footer__social a:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.footer__bottom {
  padding-top: var(--spacing-8);
  border-top: 1px solid var(--color-gray-800);
  text-align: center;
}

.footer__copyright {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Section Headers
   -------------------------------------------------------------------------- */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--spacing-12);
}

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

.section-header__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   News/Events List
   -------------------------------------------------------------------------- */
.news-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.news-item {
  display: flex;
  gap: var(--spacing-4);
  padding: var(--spacing-4);
  background-color: var(--color-white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.news-item:hover {
  box-shadow: var(--shadow-md);
}

.news-item__date {
  flex-shrink: 0;
  width: 60px;
  text-align: center;
  padding: var(--spacing-2);
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--border-radius-md);
}

.news-item__day {
  display: block;
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  line-height: 1;
}

.news-item__month {
  display: block;
  font-size: var(--font-size-xs);
  text-transform: uppercase;
}

.news-item__content {
  flex: 1;
}

.news-item__title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-1);
}

.news-item__title a {
  color: var(--color-gray-800);
}

.news-item__title a:hover {
  color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Responsive Design
   -------------------------------------------------------------------------- */

/* Tablet (768px+) */
@media (min-width: 768px) {
  :root {
    --container-padding: var(--spacing-6);
  }
  
  h1 {
    font-size: var(--font-size-5xl);
  }
  
  .nav {
    display: block;
  }
  
  .nav-toggle {
    display: none;
  }
  
  .hero__title {
    font-size: var(--font-size-5xl);
  }
  
  .features {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .about__grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .videos__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .brands__grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .contact__grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

/* Desktop (1024px+) */
@media (min-width: 1024px) {
  :root {
    --container-padding: var(--spacing-8);
  }
  
  .features {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .brands__grid {
    grid-template-columns: repeat(6, 1fr);
  }
}

/* Large Desktop (1280px+) */
@media (min-width: 1280px) {
  .features {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */
.text-center {
  text-align: center;
}

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

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

.mb-0 {
  margin-bottom: 0;
}

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

.mb-8 {
  margin-bottom: var(--spacing-8);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

.img-rounded {
  border-radius: var(--border-radius-xl);
}

/* --------------------------------------------------------------------------
   Mobile Navigation (Overlay)
   -------------------------------------------------------------------------- */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background-color: var(--color-white);
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  padding: var(--spacing-8);
  overflow-y: auto;
}

.mobile-nav--open {
  transform: translateX(0);
}

.mobile-nav__close {
  position: absolute;
  top: var(--spacing-4);
  right: var(--spacing-4);
  background: none;
  border: none;
  font-size: var(--font-size-2xl);
  cursor: pointer;
  color: var(--color-gray-600);
}

.mobile-nav__list {
  list-style: none;
  margin-top: var(--spacing-12);
}

.mobile-nav__list li {
  margin-bottom: var(--spacing-4);
}

.mobile-nav__list a {
  display: block;
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-800);
  padding: var(--spacing-3) 0;
  border-bottom: 1px solid var(--color-gray-200);
}

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

/* --------------------------------------------------------------------------
   Print Styles
   -------------------------------------------------------------------------- */
@media print {
  .header,
  .footer,
  .nav-toggle,
  .mobile-nav,
  .btn {
    display: none !important;
  }
  
  body {
    font-size: 12pt;
    color: #000;
    background: #fff;
  }
  
  a {
    color: #000;
    text-decoration: underline;
  }
}