body {
    font-family: 'Inter', sans-serif;
    background-color: #f8fafc; /* Light gray background */
}
.smooth-scroll {
    scroll-behavior: smooth;
}
/* Custom styles for subtle visual effects, inspired by "Phong" shading for smoothness/highlights */
.phong-gradient-text {
    background: linear-gradient(90deg, #1d4ed8, #3b82f6); /* Blue gradient */
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.phong-shadow {
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.phong-shadow:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

/* Keyframe animations for fade-in-up effect */
@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.animate-fade-in-up {
    animation: fade-in-up 0.6s ease-out forwards;
    opacity: 0; /* Hidden initially */
}
/* Staggered animation delays */
.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-400 { animation-delay: 0.4s; }
.delay-500 { animation-delay: 0.5s; }
.delay-600 { animation-delay: 0.6s; }

/* Modal styles */
.modal {
    display: none; /* Hidden by default */
    position: fixed; /* Stay in place */
    z-index: 1000; /* Sit on top */
    left: 0;
    top: 0;
    width: 100%; /* Full width */
    height: 100%; /* Full height */
    overflow: auto; /* Enable scroll if needed */
    background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
    display: flex;
    justify-content: center;
    align-items: center;
}
.modal-content {
    background-color: #fefefe;
    margin: auto;
    padding: 2.5rem;
    border-radius: 0.75rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    width: 90%;
    max-width: 500px;
    text-align: center;
    position: relative;
}
.close-button {
    color: #aaa;
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}
.close-button:hover,
.close-button:focus {
    color: #333;
    text-decoration: none;
    cursor: pointer;
}
/* Ensure images and logos are responsive */
img {
    max-width: 100%;
    height: auto;
    display: block;
}