* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

/* HEADER */
.header {
    background-color: #0b5f57;
    color: #fff;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 60px;
}

.logo {
    font-weight: bold;
    font-size: 20px;
    line-height: 1.1;
    border: 2px solid #fff;
    padding: 5px 10px;
}

.nav a {
    color: #fff;
    text-decoration: none;
    margin-left: 30px;
    font-size: 14px;
}

.nav {
    display: flex;
    gap: 30px;
    align-items: center;
}

.menu-item {
    position: relative;
    padding-bottom: 8px
}

.sub-nav {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);

    display: flex;
    flex-direction: column;
    gap: 12px;

    background: green;
    padding: 10px 15px;

    opacity: 0;
    visibility: hidden;

    transition: 0.3s ease;
    z-index: 10;
}

.menu-item:hover .sub-nav {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.sub-btn {
    text-decoration: none;
    color: #333;
    padding: 6px 12px;
    border: 1px solid #ccc;
    font-size: 13px;
}

.sub-btn:hover {
    background: #0b5f57;
    color: #fff;
    border-color: #0b5f57;
}


/* HERO */
.hero {
    height: 500px;
    background-image: url("images/background.png");
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* CONTENT */
.container {
    padding: 50px 60px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

/* CARD */
.card {
    position: relative;
    height: 220px;
    overflow: hidden;
}

.card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.overlay {
    position: absolute;
    inset: 0; /* top right bottom left = 0 */
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;

    color: #fff;
    text-align: center;

    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover {
    box-shadow: 0 15px 40px rgba(0,0,0,0.25);
}

.card:hover img {
    transform: scale(1.20);
}

.card:hover .overlay {
    opacity: 1;
}