body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #f5f7fa;
    color: #222;
}

/* ================= HEADER ================= */
header {
    position: sticky;
    top: 0;
    background: #123458;
    color: #fff;
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
}

nav a {
    color: #fff;
    margin: 0 10px;
    text-decoration: none;
}

/* ================= HERO ================= */
.hero {
    padding: 80px 20px;
    text-align: center;
    background: #123458;
    color: #fff;
}

/* ================= BUTTON ================= */
.btn {
    background: #FFC107;
    color: #000;
    padding: 12px 20px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: bold;
    display: inline-block;
}

/* ================= LAYOUT ================= */
.container {
    max-width: 1100px;
    margin: auto;
    padding: 40px 20px;
}

/* ================= CARDS ================= */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.card {
    background: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,.1);
}

/* ================= GALLERY ================= */
.gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.gallery a {
    display: block;
    overflow: hidden;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,.15);
}

.gallery img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
    transition: 0.3s;
}

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

/* ================= PLACEHOLDER ================= */
.ph {
    height: 180px;
    background: #d8dde6;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ================= FOOTER ================= */
footer {
    background: #123458;
    color: #fff;
    padding: 25px;
    text-align: center;
    margin-top: 40px;
}

/* ================= FLOAT BUTTON ================= */
.float {
    position: fixed;
    right: 20px;
    bottom: 20px;
    background: #FFC107;
    color: #000;
    padding: 15px 18px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    z-index: 999;
}

/* ================= RESPONSIVE ================= */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    nav {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }

    nav a {
        margin: 0;
    }

    .hero {
        padding: 40px 15px;
    }

    .gallery {
        grid-template-columns: 1fr;
    }

    .cards {
        grid-template-columns: 1fr;
    }

    .float {
        right: 10px;
        bottom: 10px;
        padding: 12px 14px;
    }
}

/* ================= SAFETY ================= */
img {
    max-width: 100%;
    height: auto;
}