body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #f4f7f6;
    color: #333;
}


/* Μεγάλη εικόνα αρχικής σελίδας */

.hero {
    height: 70vh;
    background-image: url("./images/ioa.jpeg") !important;
    background-size: cover;
    background-position: center;
    display: flex;
    justify-content: center;
    align-items: center;
}


.overlay {
    background: rgba(0,0,0,0.45);
    padding: 40px;
    text-align: center;
    color: white;
    border-radius: 15px;
}


.overlay h1 {
    font-size: 50px;
    margin-bottom: 10px;
}


.overlay p {
    font-size: 22px;
}


/* Κάρτες */

.cards {
    display: flex;
    justify-content: center;
    gap: 25px;
    padding: 50px;
    flex-wrap: wrap;
}


.card {
    background: white;
    width: 260px;
    padding: 30px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 25px rgba(0,0,0,0.12);
    transition: transform 0.3s, box-shadow 0.3s;
}


.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 35px rgba(0,0,0,0.18);
}

.card h2 {
    color: #1b6b7a;
    font-size: 22px;
    margin-bottom: 15px;
}
.btn {
    display: inline-block;
    margin-top: 25px;
    padding: 14px 30px;
    background-color: white;
    color: #1b6b7a;
    text-decoration: none;
    border-radius: 30px;
    font-weight: bold;
    transition: 0.3s;
}


.btn:hover {
    background-color: #1b6b7a;
    color: white;
}

.event {
    margin-top: 15px;
    color: #1b6b7a;
    font-size: 15px;
    font-weight: bold;
}

.card {
    text-decoration: none;
    color: inherit;
}