@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap');
:root[data-theme="dark"] {
    --background-color: #0d0d0d;
    --text-color: white;
    --border-color: white;
    --highlight-color: #ffcc00;
    --nav-background-color: rgba(0, 0, 0, 0.9);
    --card-background: rgba(255, 255, 255, 0.1);
    --h4-color: white;
}
:root[data-theme="light"] {
    --background-color: #f9f9f9;
    --text-color: black;
    --border-color: black;
    --highlight-color: #ffcc00;
    --nav-background-color: rgba(255, 255, 255, 0.9);
    --card-background: rgba(0, 0, 0, 0.1);
    --h4-color: black;
}
:root {
    transition: background-color 0.7s ease, color 0.7s ease, border-color 0.7s ease;
}
html, body {
    transition: background-color 0.7s ease, color 0.7s ease, border-color 0.7s ease;
}
* {
    color: var(--text-color);
    transition: color 0.7s ease;
}
iframe {
    width: 700px;
    height: 500px;
    transition: width 0.5s ease, height 0.5s ease;
}
body {
    background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
    background-size: 400% 400%;
    -webkit-animation: gradient 15s ease infinite;
    animation: gradient 15s ease infinite;
    font-family: "Oswald", sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}
body:hover {
    -webkit-animation: gradient 15s ease infinite;
    animation: gradient 15s ease infinite;
}

@-webkit-keyframes gradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes gradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

:root[data-theme="light"] .nav-menu li button.theme-toggle-btn {
    position: relative;
    width: 30px;
    height: 30px;
    font-size: 18px;
    padding: 0;
    border-radius: 50%;
    background: cyan;
    color: var(--text-color);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

:root[data-theme="dark"] .nav-menu li button.theme-toggle-btn {
    position: relative;
    width: 30px;
    height: 30px;
    font-size: 18px;
    padding: 0;
    border-radius: 50%;
    background: #191970;
    color: var(--text-color);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

p {
font-family: 'Barlow Condensed', sans-serif;
}

.nav-menu li button.theme-toggle-btn:hover {
    transform: scale(1.2) rotate(10deg);
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}
@media screen and (max-width: 768px) {
    .nav-menu li button.theme-toggle-btn {
        margin: 10px auto;
        width: 50px;
        height: 50px;
        font-size: 24px;
    }
    iframe {
       width: 300px;
       height: 500px;
    }
}

header, footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--nav-background-color);
    padding: 15px 30px;
    border: 2px solid var(--border-color);
    box-shadow: 0px 0px 10px rgba(255, 255, 255, 0.2);
}

footer h4 {
    margin: 0;
    color: var(--h4-color);
}

.social-icons a{
    color: var(--text-color);
    font-size: 24px;
    text-decoration: none;
}

.social-icons a:hover i {
    color: var(--highlight-color);
    font-size: 24px;
    text-decoration: none;
    transition: color 0.3s ease;
}

.nav-menu {
    list-style: none;
    display: flex;
    gap: 20px;
    margin-left: auto;
}

.nav-menu li {
    display: inline;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-size: 18px;
    padding: 8px 12px;
    transition: 0.3s;
}

.nav-menu a:hover {
    background: var(--highlight-color);
    color: black;
    border-radius: 5px;
}

.hamburger {
    display: none;
    cursor: pointer;
    z-index: 1100;
}

.hamburger div {
    width: 30px;
    height: 4px;
    background-color: var(--text-color);
    margin: 6px 0;
    transition: 0.3s;
}
.hamburger.active div:nth-child(1) {
    transform: rotate(45deg);
    position: relative;
    top: 12px;
}

.hamburger.active div:nth-child(2) {
    opacity: 0;
}

.hamburger.active div:nth-child(3) {
    transform: rotate(-45deg);
    position: relative;
    top: -8px;
}

@media screen and (max-width: 768px) {
    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 90px;
        left: 0;
        z-index: 1000;
        right: 0;
        background-color: var(--nav-background-color);
        border-top: 1px solid var(--border-color);
        border-left: 1px solid var(--border-color);
        border-right: 1px solid var(--border-color);
        border-bottom: 1px solid var(--border-color);
        margin: 20px;
    }

    .nav-menu.show {
        display: flex;
    }

    .nav-menu li {
        display: block;
        padding: 10px 0;
        text-align: center;
        margin: 6px;
    }

    .hamburger {
        display: block;
    }

    .nav-menu li a {
        padding: 12px 20px;
        border-bottom: 1px solid var(--border-color);
    }
}
main {
    display: flex;
    justify-content: center;
    align-items: center;
    flex: 1;
    text-align: center;
    padding: 20px;
}

.card {
    background: var(--nav-background-color);
    color: var(--text-color);
    text-align: center;
    padding: 50px;
    border: 2px solid var(--border-color);
    width: 80%;
    max-width: 800px;
    border-radius: 10px;
    transition: 0.3s ease;
    margin-bottom: 20px;
}

.card:hover {
    transform: translateY(-5px);
}
.logo {
    width: 50px;
    height: 50px;
    margin-right: 10px;
}
.logo-container {
    display: flex;
    align-items: center;
}

.logo-text {
    color: var(--text-color);
    font-size: 22px;
    font-weight: bold;
    margin-left: 10px;
    line-height: 50px;
    vertical-align: middle;
}

#preloader {
    position: fixed;
    width: 100%;
    height: 100%;
    background: var(--background-color);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease-in-out;
}
.spinner {
    width: 60px;
    height: 60px;
    border: 6px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--highlight-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 15px;
}
.preloader-text {
    color: var(--text-color);
    font-size: 20px;
    font-family: 'Oswald', sans-serif;
    text-transform: uppercase;
    letter-spacing: 3px;
    animation: pulse 1.5s infinite;
}

.preloader-info {
    color: var(--text-color);
    font-size: 16px;
    font-family: 'Oswald', sans-serif;
    margin-top: 5px;
    animation: pulse 1.5s infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}
.advertisement {
    text-align: center;
    margin: 10px auto;
}

.advertisement-title {
    color: white;
    font-size: 30px;
}

.advertisement-image {
    width: 100%;
    height: auto;
    border: 5px dashed white;
    max-width: 600px;
    margin: 10px auto;
}
@media screen and (max-width: 768px) {
    .advertisement-image {
        width: 90%;
        margin: 10px auto;
    }
}