body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f8f9fa;
}

.main-content {
    min-height: calc(100vh - 200px);
}

.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 0 0 20px 20px;
    margin-bottom: 2rem;
}

.max-width-md {
    max-width: 600px;
    margin: 0 auto;
}

.skill-card {
    transition: transform 0.2s, box-shadow 0.2s;
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.skill-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.category-card {
    transition: transform 0.2s, box-shadow 0.2s;
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.category-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.category-icon {
    font-size: 2rem;
}

.category-icon-large {
    font-size: 3rem;
}

.footer {
    background-color: #343a40;
    color: #fff;
    padding: 2rem 0;
}

.footer a {
    color: #fff;
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

.markdown-content {
    line-height: 1.6;
}

.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4,
.markdown-content h5,
.markdown-content h6 {
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.markdown-content p {
    margin-bottom: 1rem;
}

.markdown-content code {
    background-color: #f4f4f4;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
}

.markdown-content pre {
    background-color: #f4f4f4;
    padding: 1rem;
    border-radius: 5px;
    overflow-x: auto;
}

.markdown-content pre code {
    background-color: transparent;
    padding: 0;
}

.markdown-content ul,
.markdown-content ol {
    margin-bottom: 1rem;
    padding-left: 2rem;
}

.markdown-content li {
    margin-bottom: 0.5rem;
}

.markdown-content blockquote {
    border-left: 4px solid #667eea;
    padding-left: 1rem;
    margin: 1rem 0;
    color: #6c757d;
}

.markdown-content a {
    color: #667eea;
    text-decoration: none;
}

.markdown-content a:hover {
    text-decoration: underline;
}

.markdown-content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
}

.markdown-content th,
.markdown-content td {
    border: 1px solid #dee2e6;
    padding: 0.75rem;
    text-align: left;
}

.markdown-content th {
    background-color: #f8f9fa;
}

.comment-item {
    animation: fadeIn 0.3s ease-in;
}

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

.btn-group .btn {
    margin-left: 0.25rem;
}

.list-group-item.active {
    background-color: #667eea;
    border-color: #667eea;
}

.list-group-item.active:hover {
    background-color: #5a6fd6;
    border-color: #5a6fd6;
}

.opacity-50 {
    opacity: 0.5;
}

.navbar-brand {
    font-weight: 600;
}

.announcement-bar {
    background-color: #fff9e6;
    border-bottom: 1px solid #ffc107;
}

.announcement-label {
    white-space: nowrap;
    color: #856404;
}

.announcement-scroll {
    position: relative;
}

.announcement-content {
    animation: scroll-left 20s linear infinite;
}

.announcement-content:hover {
    animation-play-state: paused;
}

.announcement-item {
    white-space: nowrap;
    flex-shrink: 0;
}

@keyframes scroll-left {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}