body {
    margin: 0;
    font-family: Arial, sans-serif;
    line-height: 1.7;
    background-color: #f9f9f9;
    color: #333333;
}

header {
    background-color: #2A5CA9;
    color: #ffffff;
    padding: 1.5rem 1rem;
}

header h1 {
    margin: 0;
}

nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 0.5rem;
}

nav a {
    color: #ffffff;
    text-decoration: none;
    font-weight: bold;
}

nav a:hover,
nav a:focus {
    text-decoration: underline;
}

main {
    max-width: 900px;
    margin: auto;
    padding: 1.5rem;
}

section {
    background-color: #ffffff;
    padding: 1.2rem;
    margin-bottom: 1.5rem;
    border-radius: 6px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

section h2 {
    margin-top: 0;
    color: #2A5CA9;
}

img {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 1rem auto;
    border-radius: 6px;
}

.hero-image {
    max-width: 60%;
}

footer {
    background-color: #eaeaea;
    text-align: center;
    padding: 1rem;
    margin-top: 2rem;
    font-size: 0.9rem;
}

@media (max-width: 600px) {
    nav ul {
        flex-direction: column;
    }

    .hero-image {
        max-width: 100%;
    }
}

.flip-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.flip-card {
    perspective: 1000px;
    height: 220px;
    cursor: pointer;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.7s ease;
    transform-style: preserve-3d;
}

.flip-card:hover .flip-card-inner,
.flip-card:focus .flip-card-inner {
    transform: rotateY(180deg);
}

.flip-card-front,
.flip-card-back {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    border-radius: 12px;
    padding: 1.2rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}

.flip-card-front {
    background-color: #f3f8ff;
    color: #1a2b4c;
    font-size: 1.2rem;
    font-weight: bold;
}

.flip-card-back {
    background-color: #2A5CA9;
    color: #ffffff;
    transform: rotateY(180deg);
}

.flip-card-back h3 {
    margin-top: 0;
}