body {
    font-family: 'Segoe UI', sans-serif;
    margin: 0;
    padding: 0;
    background: #060923;
}

header {
    width: 100%;
    background: #060923;
    border-bottom: 1px solid hsla(0,0%,100%,.102);
    /* width: 100%; */
}

.block-title {
    display: flex;
    align-items: center;
    text-decoration: none;
    outline: none;
    -webkit-tap-highlight-color: transparent;
}



.logo {
    display: flex;
    align-items: center;
}

.logo img {
    margin-right: -15px;
    width: 130px;
    height: 130px;
}

.logo h1 {
    font-family: "Oswald", sans-serif;
    font-optical-sizing: auto;
    margin-bottom: 6px;
    font-style: normal;
    font-size: 50px;
    color: #fff;
    background: linear-gradient(
    90deg,
    #ff8080,
    #ffb366,
    #ffff99,
    #99ff99,
    #99ffff,
    #99ccff,
    #d1b3ff,
    #ff99cc,
    #b3fff0
    );
    background-size: 300% 300%; /* Tạo hiệu ứng gradient mượt hơn */
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: bold;
    animation: rainbow-move 5s ease infinite;
}

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


.log {
    list-style-type: none;
    color: #fff;
    display: flex;
    margin-left: auto;
    margin-right: 3%;
    display: flex;
    gap: 10px;
}

.log a {
    text-decoration: none;
    color: #fff;
    font-family: "Oswald", sans-serif;
    font-optical-sizing: auto;
    font-weight: 400;
    font-style: normal;
    font-size: 18px;
}


.login {
    padding: 7px;
    background-color:#0865FE;
    color: #fff;
    border-radius: 5px;
    outline: none;
    -webkit-tap-highlight-color: transparent;
}

.login:hover {
    background-color: #1877F2;
    transition: 0.4s;
    animation: moveUplogmb 0.5s ease forwards;
}

@keyframes moveUplogmb {
    0% {
        transform: translateY(0);
    }
    100% {
        transform: translateY(-5px);
    }
}

.signup {
    padding: 7px;
    background-color: #fff;
    color: #000;
    border-radius: 5px;
    outline: none;
    -webkit-tap-highlight-color: transparent;
}

.signup:hover {
    background-color: azure;
    transition: 0.4s;
    animation: moveUplogmb 0.5s ease forwards;
}

@keyframes moveUplogmb {
    0% {
        transform: translateY(0);
    }
    100% {
        transform: translateY(-5px);
    }
}


nav {
    display: flex;
    color: #fff;
}

.item-pc {
    padding-bottom: 10px;
    display: flex;
    margin-left: 3%;
    gap: 20px;
}

.item-pc li{
    list-style-type: none;
    display: inline;
}

.item-pc a {
    text-decoration: none;
    font-size: 15px;
    color: #fff;
    font-family: "TikTok Sans", sans-serif;
    font-optical-sizing: auto;
    font-weight: 500;
    font-style: normal;
    font-variation-settings:
        "slnt" 0,
        "wdth" 100;
    outline: none;
    -webkit-tap-highlight-color: transparent;
}

.item-pc a:hover {
    color: #00F5FF;
    transition: 0.4s;
}

.btn-menu {
    width: 28px;
    height: 28px;
    filter: brightness(0) invert(1);
    margin-left: 15px;
    display: none;
    outline: none;
    -webkit-tap-highlight-color: transparent;
}



.nav-mobile {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    width: 320px;
    max-width: 100%;
    height: 100vh;
    background-color: #060923;
    padding: 20px;
    flex-direction: column;
    transform: translateX(-100%);
    transition: transform 0.4s ease;
    will-change: transform;
    box-sizing: border-box;
    z-index: 9999;
}




.title-mobile {
    height: 10%;
    display: flex;
    align-items: center;
    margin-left: -23px;
    justify-content: center;
}


.title-mobile img {
    width: 100px;
    height: 100px;
    margin-right: -15px;
}


.title-mobile h1 {
    font-family: "Oswald", sans-serif;
    font-optical-sizing: auto;
    font-weight: 500;
    font-style: normal;
    font-size: 30px;
    color: #fff;
    background: linear-gradient(
    90deg,
    #ff8080,
    #ffb366,
    #ffff99,
    #99ff99,
    #99ffff,
    #99ccff,
    #d1b3ff,
    #ff99cc,
    #b3fff0
    );
    background-size: 300% 300%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: bold;
    animation: rainbow-move 5s ease infinite;
}

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



.nav-mobile-close {
    margin-top: 50px;
    display: flex;
    
}


.btn-menu-mobile {
    width: 28px;
    height: 28px;
    filter: brightness(0) invert(1);
    margin-top: 2px;
    margin-left: auto;
    cursor: pointer;
    outline: none;
    -webkit-tap-highlight-color: transparent;
}



.log-mobile {
    list-style-type: none;
    display: flex;
    color: #fff;
    font-family: "Oswald", sans-serif;
    font-optical-sizing: auto;
    font-weight: 400;
    font-style: normal;
    font-size: 15px;
    gap: 10px;
}

.log-mobile a {
    text-decoration: none;
    
}


.login-mobile {
    padding: 7px;
    background-color:#0865FE;
    border-radius: 5px;
    
}

.login a {
    color: #fff;
}

.login-mobile:hover {
    background-color: #1877F2;
    transition: 0.4s;
    animation: moveUp 0.3s ease forwards;
}

@keyframes moveUp {
    0% {
        transform: translateY(0);
    }
    100% {
        transform: translateY(-3px);
    }
}

.signup-mobile {
    padding: 7px;
    background-color: #fff;
    color: #000;
    border-radius: 5px;
}

.signup a {
    color: #000;
}

.signup-mobile:hover {
    background-color: azure;
    transition: 0.4s;
    animation: moveUp 0.3s ease forwards;
}


@keyframes moveUp {
    0% {
        transform: translateY(0);
    }
    100% {
        transform: translateY(-3px);
    }
}

/* ------------------------------------------------- */


.item-mobile {
    margin-top: 50px;
}


.item-mobile a {
    text-decoration: none;
    list-style-type: none;
    font-size: 15px;
    color: #fff;
    display: block;
    padding: 16px 0;
    text-align: left;
    border-bottom: 1px solid hsla(0,0%,100%,.102);
    font-family: "TikTok Sans", sans-serif;
    font-optical-sizing: auto;
    font-weight: 250;
    font-style: normal;
    font-variation-settings:
        "slnt" 0,
        "wdth" 100;
    outline: none;
    -webkit-tap-highlight-color: transparent;
}


.item-mobile a:hover {
    color: #00F5FF;
    transition: 0.4s;
}







.overlay {
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.3);
    display: none;
}



.nav__input:checked ~ .overlay {
    display: block;
}

.nav__input:checked ~ .nav-mobile {
    transform: translateX(0%);
    transition: transform 0.4s ease;
    will-change: transform;
    overflow-y: hidden;
}






/* Tablet  & Mobile*/
@media only screen and (max-width: 63.9375em) {
    .logo h1 {
        display: none;
    }

    .log {
        display: none;
    }

    .item-pc {
        display: none;
    }

    .logo {
        justify-content: center;
    }

    .logo img {
        width: 100px;
        height: 100px;
    }

    .btn-menu {
        display: block;
        margin-right: auto;
        cursor: pointer;
    }


}