body {
    font-family: 'Noto Sans KR', sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.nav-link {
    color: #a1a1aa; /* zinc-400 */
    transition: all 0.2s ease-in-out;
}

.nav-link:hover {
    background-color: #262626; /* neutral-800 */
    color: #ffffff;
}

.nav-link.active {
    background-color: #2563eb; /* blue-600 */
    color: #ffffff;
    box-shadow: 0 4px 14px 0 rgba(37, 99, 235, 0.25);
}

#main-content {
    background: linear-gradient(180deg, rgba(17, 24, 39, 0) 0%, rgba(17, 24, 39, 0.5) 100%), #111827; /* bg-gray-900 */
}

.feature-card {
    background-color: rgba(31, 41, 55, 0.5); /* bg-gray-800 with opacity */
    border: 1px solid #374151; /* gray-700 */
    border-radius: 0.75rem; /* rounded-xl */
    transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out, border-color 0.2s ease-in-out;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: #2563eb; /* blue-600 */
    box-shadow: 0 10px 25px -5px rgba(37, 99, 235, 0.15), 0 8px 10px -6px rgba(37, 99, 235, 0.15);
}

.feature-card .card-icon {
    transition: color 0.2s ease-in-out;
}

.feature-card:hover .card-icon {
    color: #2563eb; /* blue-600 */
}

/* Scrollbar styles for a more integrated look */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #1f2937; /* gray-800 */
}

::-webkit-scrollbar-thumb {
    background: #4b5563; /* gray-600 */
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #6b7280; /* gray-500 */
}

@keyframes fade-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
  animation: fade-in 0.5s ease-out forwards;
}