body { margin: 0; font-family: Arial, sans-serif; background: #f4f7fc; color: #333; line-height: 1.6; overflow-x: hidden; }
header { background: linear-gradient(135deg, #004E98, #007BFF); color: #fff; padding: 20px 0; text-align: center; position: relative; }
header h1 { font-size: 2.5em; margin: 0; }
header p { font-size: 1.2em; margin: 5px 0 0; }
.tabs { display: flex; justify-content: center; gap: 10px; margin: 20px 0; flex-wrap: wrap; }
.tab { background: #fff; color: #007BFF; padding: 10px 20px; border-radius: 5px; cursor: pointer; transition: all 0.3s ease; box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1); }
.tab.active { background: #007BFF; color: #fff; box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2); }
.container { max-width: 1400px; margin: 0 auto; padding: 20px; display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.card { background: #fff; border-radius: 10px; box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1); overflow: hidden; transition: transform 0.3s ease; }
.card:hover { transform: translateY(-5px); }
.card img { width: 100%; height: auto; display: block; }
.card-content { padding: 15px; }
.card h3 { margin-top: 0; font-size: 1.5em; }
.card p { margin: 10px 0 0; }
.sidebar { display: none; position: fixed; top: 0; right: -300px; width: 300px; height: 100%; background: #fff; box-shadow: -2px 0 5px rgba(0, 0, 0, 0.1); transition: right 0.3s ease; z-index: 1000; }
.sidebar.open { right: 0; }
.sidebar-header { background: #007BFF; color: #fff; padding: 15px; text-align: center; }
.sidebar ul { list-style: none; padding: 0; margin: 0; }
.sidebar li { padding: 10px 15px; border-bottom: 1px solid #ddd; cursor: pointer; }
.sidebar li:hover { background: #f0f0f0; }
.toggle-sidebar { position: fixed; top: 20px; right: 20px; background: #007BFF; color: #fff; border: none; padding: 10px 15px; border-radius: 5px; cursor: pointer; z-index: 1001; }
@media (min-width: 768px) { .container { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); } }
@media (min-width: 1024px) { .sidebar { display: block; } }
@media (min-width: 1200px) { header h1 { font-size: 3em; } .card h3 { font-size: 1.8em; } }
.spinner { border: 4px solid rgba(0, 0, 0, 0.1); width: 36px; height: 36px; border-radius: 50%; border-left-color: #007BFF; animation: spin 1s linear infinite; margin: 20px auto; display: none; }
@keyframes spin { to { transform: rotate(360deg); } }
.article-container { background: #fff; padding: 20px; border-radius: 10px; box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1); margin-top: 20px; }
.article-container h2 { color: #007BFF; }
.article-container pre { background: #f4f7fc; padding: 10px; border-radius: 5px; overflow-x: auto; }
.icon { transition: opacity 0.3s ease; }
.icon:hover { opacity: 0.7; }
.grid-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; }