html, body {
    margin: 0;
    padding: 0;
    overflow-x: hidden; /* prevent horizontal scroll */
    margin-top: 3vh;
    background-color: black;
}

/* fixed navigation bar */
.navbar {
    display: flex;
    justify-content: center;
    overflow: hidden;
    background-color: rgba(1,1,1, 0.8);
    position: fixed;
    top: 0;
    width: 100%;
    padding: 10px 0; 
    z-index: 1000; 
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
}

/* nav links */
.navbar a {
    float: left;
    display: block;
    color: #f2f2f2;
    text-align: center;
    padding: 14px 20px;
    text-decoration: none;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: 1.3rem; 
    transition: background 0.3s, color 0.3s; /* hover effect*/
}

#home{
    background-color: #fc6a3e;
    color: white;
    border-radius: 0.5vw;
}

/* hover effect for links */
.navbar a:hover {
    background: rgba(255, 255, 255, 0.2); 
    color: #fff; 
    border-radius: 0.5vw; 
}

.navbar #home:hover {
    background: rgba(255, 255, 255, 0.2); 
    color: #fff; 
}

/* default styles */
h1{
    color: white;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 4.5vh;
    line-height: 1.5;
}

p{
    color: white;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 2.5vh;
    line-height: 1.5;
}


/* Page Contents */

.main{
    display: grid;
    align-items: center;
    background-color: black;
    margin-top: 5vw;
}

.welcome{
    grid-column: 1 / span 2;
    position: relative; 
    width: 100%; 
    height: 100vh; 
    overflow: hidden;
    margin-top: 3.5vh;
}

.welcome img {
    width: 100%; 
    height: 100%; 
    object-fit: cover; 
}

/* grid containers */
.oddcontainer, .evencontainer{
    display: grid;
    width: 100vw;
    height: 100vh;
    position: relative;
    cursor: pointer; 
}

/* left image, right text */
.oddcontainer{
    grid-template-columns: 65% 35%; 
}

.left-image {
    grid-column: 1;
    grid-row: 1;
    width: 100%;
    height: 100%;
}

.left-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 0 1vw 1vw 0;
}

.right-text {
    grid-column: 2;
    grid-row: 1;
    display: flex;
    flex-direction: column;
    justify-content: center; 
    align-items: right; 
    text-align: right;
    padding: 4vh;
    opacity: 0;
    transform: translateY(50px); 
    transition: opacity 0.5s ease, transform 0.5s ease; 
}


/* left text, right image */
.evencontainer{
    grid-template-columns: 35% 65%;  
}

.right-image {
    grid-column: 2; 
    grid-row: 2;
    width: 100%;
    height: 100%;
}

.right-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 1vw 0 0 1vw;
}

.left-text {
    grid-column: 1; 
    grid-row: 2;
    display: flex;
    flex-direction: column;
    justify-content: center; 
    align-items: flex-start;
    text-align: left;
    padding: 4vh;
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

/* reveal text when hover */
.oddcontainer:hover .right-text,
.evencontainer:hover .left-text {
    opacity: 1;
    transform: translateY(0);
}


/* image transitions */
.left-image img {
    transform: translateX(-100%); 
    transition: transform 1s ease-in-out;
}

.right-image img {
    transform: translateX(100%); 
    transition: transform 1s ease-in-out; 
}

.oddcontainer:hover .left-image img {
    transform: translateX(0);
}

.evencontainer:hover .right-image img {
    transform: translateX(0); 
}




/* additional features */

/* Welcome overlay */
/* fade in animation */
@keyframes fadeIn {
    from {
        opacity: 0; /* Start transparent */
    }
    to {
        opacity: 1; /* End fully visible */
    }
}

/* dark overlay */
.welcome::before {
    content: "";
    position: absolute; 
    top: 0;
    left: 0;
    width: 100%; 
    height: 100%; 
    background: rgba(0, 0, 0, 0.5); /* black overlay */
    z-index: 1; /* ensure overlay is below text */
}

/* text overlay id */
#welcome {
    font-family: oswald;
    font-size: 6vw; 
    color: white; 
    position: absolute; 
    top: 50%; 
    left: 50%; 
    transform: translate(-50%, -100%); 
    text-align: center; 
    z-index: 2; 
    text-transform: uppercase; 
    letter-spacing: 0.1em; 
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.7); 
    white-space: nowrap; 
    padding: 0 10px;
    animation: fadeIn 2s ease-in; /*fade in animation*/
}



/* see more button feature */
.button {
    border-radius: 4px;
    background-color: #ff5722;
    border: none;
    color: #FFFFFF;
    text-align: center;
    font-size: 1.2vw;
    padding: 1vw;
    width: 9vw;
    transition: all 0.5s;
    cursor: pointer;
    margin: 5px;
}

.button span {
    cursor: pointer;
    display: inline-block;
    position: relative;
    transition: 0.5s;
}

.button span:after {
    content: '\00bb';
    position: absolute;
    opacity: 0;
    top: 0;
    right: -20px;
    transition: 0.5s;
}

.button:hover span {
    padding-right: 25px;
}

.button:hover span:after {
    opacity: 1;
    right: 0;
}

/* footer */
footer {
    margin-top: 1.5vw;
    background-color: #111;
    color: #fff;
    padding: 1vw;
    text-align: center;
    position: relative;
    bottom: 0;
    width: 100%;
}

.footer-container {
    font-size: 0.5vw;
    font-family: 'Times New Roman', Times, serif;
    align-items: center;
}

/* media queries for mobile */

/* nav bar */
@media (max-width: 768px) {
    .navbar{
        display:flex;
        flex-direction: row;
        flex-wrap: wrap;
        overflow: hidden;
        justify-content: center;
        padding: 8px 0;
        margin: 0 auto;
    }

    .navbar a {
        padding: 2vh 2vw; 
        margin: 1vh 0;
        font-size: 3vw;
        flex:none;
    }

    .oddcontainer, .evencontainer{
        display: flex;
        flex-direction: column;
        width: 100%;
        height: auto;
        padding: 0;
    }
    .left-image img, .right-image img{
        width: 100%;
        height: auto;
        object-fit: cover;
        transform: none;
        transition: none;
    }
    .left-text, .right-text{
        padding: 2vh 4vw;
        text-align: center;
        justify-content: center;
        align-items: center;
        width: 100%;
        height: auto;
        opacity: 1;
        box-sizing: border-box;
        transform: none;
        transition: none;
    }
    h1{
        font-size: 5vw;
    }
    p{
        font-size: 3.5vw;
    }
    footer{
        padding: 1vw;
        margin-top: 3vw;
    }
    footer p {
        font-size: 3vw;
    }
    .button{
        font-size: 3.5vw;
        width: auto;
        padding: 3vh 6vw;
    }
}