:root {
    --color-primary: #3498db;
    --color-primary-dark: #2980b9;
    --color-background: #f4f6f7;
    --color-surface: #ffffff;
    --color-text-primary: #2c3e50;
    --font-family-sans-serif: "Poppins", sans-serif;
    --logo-height: 120px;
}

body {
    font-family: var(--font-family-sans-serif);
    background-color: var(--color-background);
    color: var(--color-text-primary);
    padding-top: 56px; /* Adjust for fixed-top navbar */
}

.hero-section {
    background-color: var(--color-primary);
    padding: 4rem 0;
    margin-bottom: 3rem;
}

.app-logo {
    height: var(--logo-height);
    width: var(--logo-height);
    border-radius: 50%;
    animation: pulse-animation 2s infinite ease-in-out;
    background-color: var(--color-surface);
    padding: 10px;
    overflow: hidden;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 25px rgba(0,0,0,0.2);
    margin-bottom: 1.5rem;
}

@keyframes pulse-animation {
    0% {
        transform: scale(1);
        box-shadow: 0 0 25px rgba(0,0,0,0.2);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 35px rgba(255, 255, 255, 0.8);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 0 25px rgba(0,0,0,0.2);
    }
}

section {
    padding: 2rem 0;
}

.card {
    border: none;
    box-shadow: 0 0.5rem 1rem rgba(0,0,0,0.1);
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-5px);
}

.accordion-button:not(.collapsed) {
    color: var(--color-text-primary);
    background-color: var(--color-primary-light);
}

.navbar-brand img {
    margin-right: 0.5rem;
}

footer {
    background-color: #343a40;
}