body {
    background: #f5f7fa;
    font-family: "Segoe UI", sans-serif;
}

.hero {
    background: linear-gradient(135deg, #212529, #343a40);
    color: white;
    padding: 4rem 1rem;
    text-align: center;
}

.hero img {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    margin-bottom: 1rem;
    border: 3px solid #fff;
    object-fit: cover;
}

.repo-card {
    border: none;
    border-radius: 15px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.repo-card:hover {
    transform: translateY(-7px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.badge {
    font-size: 0.8rem;
}

footer {
    margin-top: 3rem;
    padding: 1.5rem;
    background: #212529;
    color: #ccc;
    text-align: center;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    flex-direction: column;
}

.spinner-border {
    width: 3rem;
    height: 3rem;
    margin-bottom: 1rem;
}

.loading-text {
    font-size: 1.2rem;
    font-weight: bold;
    color: #212529;
}