:root {
        --brand: oklch(68.1% 0.162 75.834);
        --ink: #0f172a;
        --muted: #ffffff;
    }

    * {
        box-sizing: border-box
    }

    html,
    body {
        height: 100%
    }

    .main-area {
        min-height: 100vh;
        position: relative;
    }

    body {
        background: #333333;
        overflow: hidden;
        margin: 0;
        font-family: "Noto Sans", system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial;
        color: var(--ink);
    }

    .logo-area {
        position: absolute;
        top: 24px;
        left: 50%;
        transform: translateX(-50%) translateY(-8px);
        opacity: 0;
        animation: fadeDown .6s ease-out .5s forwards;
        z-index: 3;
        display: flex;
        align-items: center;
        justify-content: center
    }

    .logo-area img {
        height: 70px;
        width: auto;
        display: block
    }

    @keyframes fadeDown {
        from {
            opacity: 0;
            transform: translateX(-50%) translateY(-8px)
        }

        to {
            opacity: 1;
            transform: translateX(-50%) translateY(0)
        }
    }

    @keyframes fadeIn {
        to {
            opacity: 1;
        }
    }

    .content-wrap {
        height: 600px;
        display: grid;
        place-items: center;
        padding: 160px 0px 160px;
        text-align: center;
    }

    .welcome-box {
        max-width: 760px;
        margin: 0 auto;

    }

    .welcome-box h1 {
        font-weight: 800;
        font-size: clamp(28px, 4.2vw, 44px);
        margin: 0 0 8px;
        color: #6ABFA1;
        opacity: 0;
        animation: fadeIn 1.4s ease-out 1.4s forwards;
    }

    .welcome-box p,
    .choose-text {
        margin: 0 auto;
        color: var(--muted);
        font-size: clamp(15px, 1.6vw, 18px);
        max-width: 60ch;
        opacity: 0;
        animation: fadeIn 1.6s ease-out 1.6s forwards;
        padding: 10px 0px;
    }

    .choose-time {
        opacity: 0;
        animation: fadeIn 1.6s ease-out 1.6s forwards;
        padding: 5px 0px;
        font-size: 14px;
    }

    .welcome-button-area {
        display: flex;
        gap: 20px;
        justify-content: center;
        flex-wrap: wrap;
        margin-top: 0px;
        opacity: 0;
        animation: fadeIn 2s ease-out 2s forwards;
    }


    .lang-option {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 10px 16px;
        border: 2px solid var(--brand);
        border-radius: 8px;
        cursor: pointer;
        background: #fff;
        font-weight: 600;
        color: var(--ink);
        transition: all 0.2s ease;
    }

    .lang-option input[type="checkbox"] {
        display: none;

    }

    .lang-option:hover {
        background: var(--brand);
        color: #fff;
    }

    .lang-option img {
        width: 24px;
        height: auto;
    }

    .ocean {
        height: 5%;
        width: 100%;
        position: absolute;
        bottom: 0;
        left: 0;
        background: #6ABFA1;
        z-index: 1;
    }

    .wave {
        background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1600 198' aria-hidden='true'%3E%3Cdefs%3E%3ClinearGradient id='a' x1='50%25' x2='50%25' y1='-10.959%25' y2='100%25'%3E%3Cstop stop-color='%236ABFA1' stop-opacity='.25' offset='0%25' /%3E%3Cstop stop-color='%236ABFA1' offset='100%25' /%3E%3C/linearGradient%3E%3C/defs%3E%3Cpath fill='url(%23a)' fill-rule='evenodd' d='M.005 121C311 121 409.898-.25 811 0c400 0 500 121 789 121v77H0s.005-48 .005-77z' transform='matrix(-1 0 0 1 1600 0)' /%3E%3C/svg%3E");
        position: absolute;
        top: -198px;
        width: 6400px;
        height: 198px;
        animation: wave 7s cubic-bezier(0.36, 0.45, 0.63, 0.53) infinite;
        transform: translate3d(0, 0, 0);
    }

    .wave:nth-of-type(2) {
        top: -175px;
        animation: wave 7s cubic-bezier(0.36, 0.45, 0.63, 0.53) -0.125s infinite, swell 7s ease -1.25s infinite;
        opacity: 1;
    }

    @keyframes wave {
        0% {
            margin-left: 0;
        }

        100% {
            margin-left: -1600px;
        }
    }

    @keyframes swell {

        0%,
        100% {
            transform: translate3d(0, -25px, 0);
        }

        50% {
            transform: translate3d(0, 5px, 0);
        }
    }

    .endWave {
        display: none;
    }


    .lang-option {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 10px 16px;
        border: 2px solid var(--brand);
        border-radius: 8px;
        cursor: pointer;
        background: #fff;
        font-weight: 600;
        color: var(--ink);
        transition: all 0.2s ease;
    }

    .lang-option input[type="checkbox"] {
        display: none;

    }

    .lang-option:hover {
        background: var(--brand);
        color: #fff;
    }

    .lang-option img {
        width: 24px;
        height: auto;
    }

    .bg-white {
        background-color: #fff;
    }

    .m10 {
        margin-top: 10px;
        margin-bottom: 10px;
    }

    .mb10 {
        margin-bottom: 16px;
    }