:root {
  --primary-color: #000;
  --secondary-color: #86868b;
  --background-color: #f5f5f7;
  --link-color: #06c;
  --link-hover-color: #2997ff;
  --font-main: 'Poppins', 'Open Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --max-width: 1440px;
  --header-height: 44px;
  --footer-bg: #f5f5f7;
  --transition-speed: 0.3s;
}

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

html {
  font-size: 62.5%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  font-size: 1.4rem;
  line-height: 1.5;
  color: var(--primary-color);
  background-color: #fff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

/* Header Styles */
.site-header {
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  position: sticky;
  top: 0;
  z-index: 999;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.header-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2.2rem;
  height: var(--header-height);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 2.1rem;
  font-weight: 600;
  color: var(--primary-color);
}

.main-nav ul {
  display: flex;
  list-style: none;
}

.main-nav li {
  margin-left: 3.2rem;
}

.main-nav a {
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--primary-color);
  letter-spacing: -0.01em;
  position: relative;
}

.main-nav a:hover {
  color: var(--primary-color);
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--primary-color);
  transition: width var(--transition-speed) ease;
}

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

/* Mobile Navigation */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 1rem;
}

.hamburger {
  display: block;
  width: 2.4rem;
  height: 0.2rem;
  background-color: var(--primary-color);
  position: relative;
  transition: all var(--transition-speed) ease;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 0.2rem;
  background-color: var(--primary-color);
  transition: all var(--transition-speed) ease;
}

.hamburger::before {
  top: -0.7rem;
}

.hamburger::after {
  bottom: -0.7rem;
}

/* Footer Styles */
.site-footer {
  background-color: var(--footer-bg);
  color: var(--secondary-color);
  padding: 4.8rem 0 2.2rem;
  font-size: 1.2rem;
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2.2rem;
}

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

.footer-logo {
  font-size: 2.1rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 2.4rem;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.footer-heading {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 1.2rem;
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: 0.8rem;
}

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

.footer-section a:hover {
  color: var(--primary-color);
  text-decoration: underline;
}

.social-links {
  display: flex;
  gap: 1.6rem;
}

.footer-legal {
  border-top: 1px solid #d2d2d7;
  padding-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.copyright {
  color: var(--secondary-color);
}

.legal-links {
  display: flex;
  gap: 1.6rem;
  list-style: none;
}

.legal-links a {
  color: var(--secondary-color);
}

.legal-links a:hover {
  color: var(--primary-color);
  text-decoration: underline;
}

/* Responsive Styles */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }
  
  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 2rem;
    transform: translateY(-100%);
    opacity: 0;
    transition: all var(--transition-speed) ease;
    pointer-events: none;
  }
  
  .main-nav.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  
  .main-nav ul {
    flex-direction: column;
  }
  
  .main-nav li {
    margin: 0 0 1.6rem 0;
  }
  
  .main-nav a {
    font-size: 1.6rem;
    font-weight: 400;
  }
  
  .menu-toggle.active .hamburger {
    background-color: transparent;
  }
  
  .menu-toggle.active .hamburger::before {
    transform: translateY(0.7rem) rotate(45deg);
  }
  
  .menu-toggle.active .hamburger::after {
    transform: translateY(-0.7rem) rotate(-45deg);
  }
  
  .footer-links {
    grid-template-columns: 1fr;
  }
}

/* Year update for copyright */
#year {
  display: inline-block;
}