body { font-family: 'Arial', sans-serif; margin: 0; line-height: 1.6; color: #eee; background-color: #1a1a1a; }
a { color: #007bff; text-decoration: none; }
a:hover { text-decoration: underline; color: #ffc107; }
.site-header { background-color: #222; padding: 1rem 0; border-bottom: 1px solid #333; box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2); }
.header-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 0 1.5rem; }
.site-header .logo { font-size: 2.2rem; font-weight: bold; color: #ffc107; text-transform: uppercase; letter-spacing: 2px; text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5); transition: color 0.3s ease; }
.site-header .logo:hover { color: #007bff; text-decoration: none; }
.main-nav ul { list-style: none; margin: 0; padding: 0; display: flex; }
.main-nav li { margin-left: 1.5rem; }
.main-nav a { color: #eee; font-weight: 500; padding: 0.5rem 0; position: relative; transition: color 0.3s ease; }
.main-nav a::after { content: ''; position: absolute; left: 0; bottom: 0; width: 0; height: 2px; background-color: #007bff; transition: width 0.3s ease; }
.main-nav a:hover::after, .main-nav a.active::after { width: 100%; }
.main-nav a:hover, .main-nav a.active { color: #007bff; }
.auth-buttons.mobile-hidden { display: flex; gap: 1rem; }
.auth-buttons.desktop-hidden { display: none; }
.btn { padding: 0.6rem 1.2rem; border-radius: 5px; font-weight: bold; text-transform: uppercase; transition: background-color 0.3s ease, color 0.3s ease; }
.btn-login { background-color: #555; color: #eee; border: 1px solid #555; }
.btn-login:hover { background-color: #666; color: #fff; border-color: #666; text-decoration: none; }
.btn-register { background-color: #007bff; color: #fff; border: 1px solid #007bff; }
.btn-register:hover { background-color: #0056b3; color: #fff; border-color: #0056b3; text-decoration: none; }
.hamburger-menu { display: none; flex-direction: column; justify-content: space-around; width: 30px; height: 25px; background: transparent; border: none; cursor: pointer; padding: 0; z-index: 1000; }
.hamburger-menu span { display: block; width: 100%; height: 3px; background-color: #eee; border-radius: 3px; transition: all 0.3s ease-in-out; }
.site-footer { background-color: #222; color: #ccc; padding: 3rem 0 1rem; border-top: 1px solid #333; margin-top: 4rem; }
.footer-container { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 2rem; padding: 0 1.5rem; }
.footer-col h3 { color: #ffc107; font-size: 1.2rem; margin-bottom: 1rem; }
.footer-col p { font-size: 0.9rem; line-height: 1.8; }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col ul li { margin-bottom: 0.7rem; }
.footer-col ul a { color: #ccc; font-size: 0.9rem; transition: color 0.3s ease; }
.footer-col ul a:hover { color: #007bff; text-decoration: underline; }
.footer-contact p { margin-bottom: 0.5rem; }
.footer-bottom { text-align: center; margin-top: 3rem; padding-top: 1rem; border-top: 1px solid #333; font-size: 0.85rem; color: #aaa; }
@media (max-width: 768px) {
    .header-container { padding: 0 1rem; }
    .main-nav { display: none; flex-direction: column; position: absolute; top: 60px; left: 0; width: 100%; background-color: #222; box-shadow: 0 5px 10px rgba(0, 0, 0, 0.3); z-index: 999; padding-bottom: 1rem; }
    .main-nav.active { display: flex; }
    .main-nav ul { flex-direction: column; text-align: center; }
    .main-nav li { margin: 0; border-bottom: 1px solid #333; }
    .main-nav li:last-child { border-bottom: none; }
    .main-nav a { display: block; padding: 1rem; width: 100%; }
    .main-nav a::after { display: none; }
    .auth-buttons.mobile-hidden { display: none; }
    .auth-buttons.desktop-hidden { display: flex; flex-direction: column; gap: 0.5rem; margin-top: 1rem; padding: 0 1rem; width: 100%; box-sizing: border-box; }
    .auth-buttons.desktop-hidden .btn { width: 100%; text-align: center; }
    .hamburger-menu { display: flex; }
    .hamburger-menu.active span:nth-child(1) { transform: translateY(11px) rotate(45deg); }
    .hamburger-menu.active span:nth-child(2) { opacity: 0; }
    .hamburger-menu.active span:nth-child(3) { transform: translateY(-11px) rotate(-45deg); }
    .footer-container { grid-template-columns: 1fr; text-align: center; }
    .footer-col h3 { margin-top: 1.5rem; }
}