body {
    margin: 0;
    font-family: "Segoe UI", sans-serif;
    background: linear-gradient(135deg, #1e3c72, #2a5298);
    color: white;
}

/* Welcome Page */
.welcome-container {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.title {
    font-size: 3rem;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.3rem;
    opacity: 0.9;
    margin-bottom: 30px;
}

/* Updated white button */
.main-btn {
    padding: 12px 25px;
    font-size: 1.2rem;
    border: none;
    border-radius: 8px;
    background: #ffffff; /* white button */
    color: #333;
    cursor: pointer;
    transition: 0.3s;
}

.main-btn:hover {
    background: #e6e6e6; /* soft grey hover */
}

/* Gallery Page */
.header {
    padding: 20px;
    text-align: center;
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
    padding: 20px;
}

.gallery img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.4);
    transition: transform 0.3s;
}

.gallery img:hover {
    transform: scale(1.05);
}