body {
    background-color: #0F172A;
    color: #F8FAFC;
    font-family: 'Inter', sans-serif;
}
.nav-link {
    position: relative;
    transition: color 0.3s;
}
.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #10B981;
    transition: width 0.3s;
}
.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}
.btn-primary {
    background-color: #10B981;
    transition: background-color 0.3s, transform 0.3s;
}
.btn-primary:hover {
    background-color: #059669;
    transform: translateY(-3px);
}
.feature-card {
    background-color: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(10px);
    transition: transform 0.3s, box-shadow 0.3s;
}
.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2);
}
.screenshot-thumbnail {
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
}
.screenshot-thumbnail:hover {
    transform: scale(1.05);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}
.modal {
    display: none; /* Hidden by default */
    position: fixed; /* Stay in place */
    z-index: 100; /* Sit on top */
    left: 0;
    top: 0;
    width: 100%; /* Full width */
    height: 100%; /* Full height */
    overflow: auto; /* Enable scroll if needed */
    background-color: rgba(0,0,0,0.9); /* Black w/ opacity */
}
.modal-content {
    margin: auto;
    display: block;
    width: 80%;
    max-width: 900px;
}
.close {
    position: absolute;
    top: 15px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
}
.close:hover,
.close:focus {
    color: #bbb;
    text-decoration: none;
    cursor: pointer;
}
.prev, .next {
    cursor: pointer;
    position: absolute;
    top: 50%;
    width: auto;
    padding: 16px;
    margin-top: -50px;
    color: white;
    font-weight: bold;
    font-size: 20px;
    transition: 0.6s ease;
    border-radius: 0 3px 3px 0;
    user-select: none;
}
.next {
    right: 0;
    border-radius: 3px 0 0 3px;
}
.prev:hover, .next:hover {
    background-color: rgba(0,0,0,0.8);
}