:root {
    --navbar-background-color: #211835;
    --navbar-hover-background-color: #30234D;
    --main-background-color: rgb(17 24 39);
    --footer-background-color: rgb(26, 32, 44);
    --main-text-color: white;
    --main-text-light-color: #ffffff;
    --main-text-color-hover: #059DFF;

    /* index.html colours */
    --index-hero-border: #f1f1f1;
    --index-bg-text-bg-color: rgba(0,0,0, 0.4);
    --index-bg-text-border: #f1f1f1;

    /* about.html colours */
    --feedback-background-color: rgb(37, 47, 61);
    --feedback-h3-color: rgb(96 165 250);
    --explore-now-button: #ff7414;
    --explore-now-button-hover: rgb(234 88 12);

    /* contact.html colours */
    --input-text-area: rgb(156 163 175);
    --faq-question-hover: rgb(189, 195, 204);
    --faq-answer-text: rgb(209 213 219);

    /* travel-tips.html colours */
    --side-bar-background-color: rgba(18, 32, 47, 0.5);
    --side-bar-link-bg-hover: rgba(25, 41, 61, 0.5);
    --side-bar-link-hover: rgb(0, 151, 254);
    --flashcard-button-disabled: rgb(113 113 122);

    /* desc html colours */
    --pagination-gradient-color1: rgba(51, 65, 85, 0.4);
    --pagination-gradient-color2: rgb(0, 81, 194);

    /* gallery.html colours */
    --overlay-background-color: rgba(100, 116, 139, 1);
    --overlay-background-color-hover: rgba(51, 65, 85, 0.4);
}

.light_mode {
    --navbar-background-color: #1E3A8A;
    --navbar-hover-background-color: #3B82F6;  
    --main-background-color: #E0F7FA;  
    --footer-background-color: #B3E5FC; 
    --main-text-color: #1F2937;  
    --main-text-light-color: #ffffff;
    --main-text-color-hover: #039BE5;  

    /* index.html colours */
    --index-hero-border: #0e0e0e;
    --index-bg-text-bg-color: rgba(0,0,0, 0.4);
    --index-bg-text-border: #f1f1f1;

    /* about.html colours */
    --feedback-background-color: rgb(216, 232, 239);
    --feedback-h3-color: rgb(0, 109, 241);
    --explore-now-button: #fd9f47;
    --explore-now-button-hover: rgb(255, 133, 66);

    /* contact.html colours */
    --input-text-area: rgb(200, 206, 218);
    --faq-question-hover: rgb(83, 75, 75);
    --faq-answer-text: rgb(84, 91, 102);

    /* travel-tips.html colours */
    --side-bar-background-color: rgba(19, 86, 156, 0.5);
    --side-bar-link-bg-hover: rgba(49, 72, 99, 0.5);
    --side-bar-link-hover: rgb(0, 150, 255);
    --flashcard-button-disabled: rgb(168 162 158);

    /* desc html colours */
    --pagination-gradient-color1: rgba(44, 108, 191, 0.4);
    --pagination-gradient-color2: rgb(93, 119, 207);

    /* gallery.html colours */
    --overlay-background-color: rgba(255, 255, 255, 0.9);
    --overlay-background-color-hover: rgba(240, 240, 240, 0.4);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Open Sans', sans-serif;
}
  
body {
    height: 100vh;
    color: var(--main-text-color);
    background-color: var(--main-background-color);
}

/* nav section */
li {
    list-style: none;
}

a {
    text-decoration: none;
    color: var(--main-text-color);
    font-size: 1.3rem;
}

header{
    position: relative;
    padding: 0 2rem;
}

.navbar{
    position: fixed;
    z-index: 999;
    width: 100%;
    height: 80px;
    padding: 2vw;
    background-color: var(--navbar-background-color);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar .logo a{
    font-size: 1.5rem;
    font-weight: bold;
}

.navbar .links {
    display: flex;
}

.navbar a{
    color: var(--main-text-light-color);
}

.navbar .links li{
    padding: 20px;
}

.navbar .links a:hover {
    color: var(--main-text-color-hover);   
}

.navbar .toggle_btn {
    color: var(--main-text-light-color);
    font-size: 1.5rem;
    font-family: Arial, Helvetica, sans-serif;
    cursor: pointer;
    z-index: 1000;
    display: none;
}

.toggle_light_mode {
    background-color: var(--navbar-background-color);
    color: var(--main-text-light-color);
    height: 50px;
    width: 50px;
    border-radius: 50%;
    padding: 0;
    border: none;
    font-size: 1.3rem;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.toggle_light_mode svg{
    fill: var(--main-text-light-color);
}

.toggle_light_mode svg:last-child{
    display: none;
}

.light_mode .toggle_light_mode svg:first-child{
    display: none;
}

.light_mode .toggle_light_mode svg:last-child{
    display: block;
}

/* dropdown menu - destinations */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown:hover {
    background-color: var(--navbar-hover-background-color);
}

.dropdown a {
    color: var(--main-text-light-color);
}

.dropdown li:hover {
    background-color: rgba(48, 35, 77, 0.5);
}

.dropdown-destinations {
    display: none;
    position: absolute;
    background: rgba(48,35,77,0.5);
    backdrop-filter: blur(15px);
    font-weight: lighter;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    margin-top: 10px;
    left: 1px;
    z-index: 3;
}

.dropdown-destinations li{
    padding: 20px;
    margin: 0px;
}

.dropdown-destinations li a{
    font-size: 1rem;
}

.dropdown:hover .dropdown-destinations {
    display: block;
}

/* responsive dropdown menu */
.dropdown_menu{
    display: none;
    position: absolute;
    right: 2rem;
    top: 60px;
    height: 0;
    width: 300px;
    background: rgba(48,35,77,0.5);
    backdrop-filter: blur(15px);
    border-radius: 10px;
    overflow: hidden;
    z-index: 3;
    transition: height 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.dropdown_menu.open{
    height: 315px;
}

.dropdown_menu li {
    padding: 0.7rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.dropdown_menu li:hover {
    background: rgba(48,35,77,0.7);
}

.dropdown_menu a {
    color: var(--main-text-light-color);
    font-size: 1.2rem;
}

.dropdown_menu .toggle_light_mode {
    width: 100%;
    display: flex;
    justify-content: center;
}
/* nav section end */

/* footer section */
footer {
    background-color: var(--footer-background-color);
    color: var(--main-text-color);
    padding: 1.5vw;
    text-align: center;
    position: relative;
    bottom: 0;
    width: 100%;
}

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

.footer-container a, p{
    font-size: 0.9rem;
}

/* footer section end */


/* RESPONSIVE */
/* navbar */
@media (max-width: 992px) {
    .navbar .links{
        display: none;
    }

    .navbar .toggle_btn {
        display: block;
    }

    .dropdown_menu {
        display: block;
        position: fixed;
        z-index: 1000;
    }

    .icons{
        display: flex;
        flex-direction: row;
        justify-content: center;
        align-items: center;
        gap: 1.5vw;
    }
}   

@media (max-width: 576px) {
    .dropdown_menu {
        left: 2rem;
        width: unset;
    }
}

@media (max-height: 450px) {
    .dropdown_menu .open{
        overflow-y: scroll;
        height: 75vh;
    }

    .dropdown_menu li {
        padding: 0.7rem;
    }

    .dropdown_menu a{
        font-size: 1rem;
    }
}