html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  background-color: #0d1117; 
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #0d1117;
  color: #f0f6fc;
  line-height: 1.7;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1rem;
  text-align: left;
}

.logo {
  max-width: 200px;
  display: block;
  margin: 0 auto 1.5rem;
}

.banner {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto 1.5rem;
  border-radius: 12px;
}

.nav {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}
.nav a {
  padding: 0.5rem 1rem;
  background-color: #161b22;
  border-radius: 8px;
  text-decoration: none;
  color: #f0f6fc;
  font-weight: bold;
  transition: background-color 0.3s, transform 0.2s;
}
.nav a:hover {
  background-color: #238636;
  transform: translateY(-2px);
}

h1 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: #58a6ff;
  text-align: center;
}

h2 {
  margin-top: 2rem;
  font-size: 1.4rem;
  color: #c792ea;
  text-align: left;
}

.card {
  background-color: #161b22;
  padding: 16px;
  border-radius: 12px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.4);
  margin: 20px 0;
  cursor: pointer;
}

.card h3 {
  margin: 0;
  color: #58a6ff;
}

/* Настройки для раскрытой карточки */
.project-content {
  display: none; /* Переключается скриптом на flex */
  margin-top: 1.5rem;
  gap: 20px;
  align-items: flex-start;
  border-top: 1px solid #30363d;
  padding-top: 1.5rem;
  text-align: left;
}

.project-left {
  flex: 0 0 250px; /* Фикс ширина под мобилку */
}

.project-left video {
  width: 100%;
  border-radius: 10px;
  max-height: 450px;
}

.project-right {
  flex: 1;
}

.footer {
  margin-top: 2rem;
  font-size: 0.9rem;
  color: #8b949e;
  text-align: center;
}