@charset "utf-8";

/* ----------------- HTML & Body ----------------- */
html {
    background-color: #f0f4f8;
}

body {
    font-family: Verdana, Geneva, sans-serif;
    color: #333333;
    background-color: rgba(255, 255, 255, 0.9);
    width: 90%;
    margin-left: auto;
    margin-right: auto;
}

/* ----------------- Header ----------------- */
header {
    text-align: center;
    padding: 10px 0;
}

header img {
    max-width: 20%;
    height: auto;
    display: block;
    margin-left: auto;
    margin-right: auto;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

/* ----------------- Headings ----------------- */
h1, h2 {
    text-shadow: 4px 6px 5px gray;
}

/* ----------------- Navigation ----------------- */
nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

nav li {
    display: block;
    width: 20%;
    float: left;
}

nav a {
    display: block;
    background-color: rgb(180, 200, 215);
    line-height: 2.8em;
    text-decoration: none;
    text-align: center;
    color: rgb(40, 40, 40);
}

nav a:hover {
    background-color: rgb(120, 160, 200);
    color: white;
}

/* ----------------- Main Content ----------------- */
main {
    padding: 20px;
    margin-top: 35px;
}

main > img {
    width: 25%;
    float: right;
    margin: 0 0 10px 10px;
}

/* ----------------- Footer ----------------- */
body > footer {
    background-color: rgb(180, 200, 215);
    color: rgba(102, 102, 102, 0.6);
    font-weight: bold;
    font-size: 0.9em;
    line-height: 3em;
    text-align: center;
    margin-top: 10px;
    padding: 10px;
    clear: both;
}

/* ----------------- Education list ----------------- */
.education-list {
    list-style-type: square;
}

/* ----------------- Desktop Media Query ----------------- */
@media only screen and (min-width: 769px) {
    html {
        background-image: url('background.jpg');
        background-size: cover;
        background-repeat: no-repeat;
        background-position: center;
    }
}

/* ----------------- Mobile Media Query ----------------- */
@media only screen and (max-width: 768px) {
    body {
        width: 100%;
        margin: 0;
    }

    nav li {
        float: none;
        width: 100%;
        font-size: x-large;
    }

    nav a {
        border-bottom: 1px solid black;
    }

    main > img {
        width: 90%;
        float: none;
        margin: 10px auto;
        display: block;
    }

    /* Vacation gallery responsive */
    .gallery {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
    }

    .gallery img {
        width: 100%; /* single column on mobile */
        margin: 5px;
    }
}

/* ----------------- Vacation Gallery for Desktop ----------------- */
@media only screen and (min-width: 769px) {
    .gallery {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
    }

    .gallery img {
        width: 23%; /* 4 columns on desktop */
        margin: 1%;
    }
}

/* Tablet / medium screens (optional) */
@media only screen and (min-width: 481px) and (max-width: 768px) {
    .gallery img {
        width: 48%; /* 2 columns on tablets */
        margin: 1%;
    }
}