/* === Глобальный reset === */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  font-family: 'Roboto', sans-serif;
  margin: 0;
  padding: 0;
  background: #f5f5f5;
  color: #212121;
}

/* === Шапка === */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: transparent;
  color: #fff;
  padding: 1rem 2rem;
  z-index: 999;
  transition: background-color 0.4s ease, box-shadow 0.4s ease;
}

header.scrolled {
  background-color: #2D3748;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 16px;
  opacity: 0;
  transform: translateY(-10px);
  animation: fade-slide-in 0.6s ease forwards;
  animation-delay: 0.3s;
}

.logo img {
  width: 40px;
  height: 40px;
  object-fit: cover;
  border-radius: 8px;
}

.site-title {
  font-size: 1.6rem;
  font-weight: bold;
  line-height: 40px;
  color: #fff;
}

@keyframes fade-slide-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* === Основной контент === */
main {
  padding: 6rem 2rem 2rem;
}

/* === Hero блок === */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  overflow: hidden;
  width: 100%;
}

.overlay-dark {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #000;
  opacity: 0.8;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1200px;
  padding: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.hero-content.two-columns {
  display: flex;
  flex-direction: row;
}

.hero-text {
  flex: 1;
  text-align: center;
  color: #fff;
  padding: 1rem;
}

.hero-text h2 {
  font-size: 2.4rem;
  line-height: 1.3;
  margin: 0 auto;
  max-width: 700px;
}

/* === Блок авторизации === */
.auth-box {
  background: rgba(255, 255, 255, 0.1);
  padding: 2.5rem 2rem;
  border-radius: 14px;
  max-width: 420px;
  width: 100%;
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

.auth-box h2 {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
  color: #fff;
}

.auth-box p {
  font-size: 1rem;
  margin-bottom: 1rem;
  color: #ddd;
}

.auth-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.auth-buttons .btn {
  text-decoration: none;
  padding: 10px 20px;
  border-radius: 6px;
  font-weight: bold;
  transition: all 0.3s ease;
}

.auth-buttons .btn.login {
  background-color: transparent;
  border: 2px solid #E63600;
  color: #fff;
}

.auth-buttons .btn.login:hover {
  background-color: #E63600;
  color: #fff;
}

.auth-buttons .btn.register {
  background-color: #657D03;
  color: #fff;
  border: 2px solid transparent;
}

.auth-buttons .btn.register:hover {
  background-color: #fff;
  color: #657D03;
  border-color: #657D03;
}

/* === Секции сайта === */
.section {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  margin-bottom: 2rem;
}

/* === Подвал === */
footer {
  background-color: #212121;
  color: #fff;
  text-align: center;
  padding: 2rem 1rem;
  margin-top: 2rem;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  font-size: 0.95rem;
  opacity: 0.85;
}

/* === Кнопка вверх (hover эффект) === */
#scrollToTop:hover {
  background-color: #657D03;
  box-shadow: 0 0 8px rgba(101, 125, 3, 0.4);
}

/* === Адаптив под мобилки === */
@media (max-width: 768px) {
  .hero {
    padding-top: 80px;
    flex-direction: column;
  }

  .hero-content {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .hero-text h2 {
    font-size: 1.8rem;
    padding: 0 1rem;
  }

  .auth-box {
    margin-bottom: 1rem;
  }
}