.main-container {
    width: 100%;
    margin: 0;
    padding: 0;
  }
  
  body,
  html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100vh;
    overflow: hidden;
  }
  
  :root {
    --logo-width-ratio: 79 / 375;
    --logo-height-ratio: 33 / 812;
    --logo-top-ratio: 16 / 812;
    --logo-left-ratio: 148 / 375;
  
    --content-top-ratio: 60 / 812;
    --content-height-ratio: 752 / 812;
  
    --desc-top-ratio: 489 / 812;
    --desc-buttom-ratio: 24 / 812;
    --desc-left-ratio: 16 / 375;
    --desc-width-ratio: 343 / 375;
    
    --alert-top-ratio: 395 / 812;
    --alert-width-ratio: 251 / 375;
  
    --font-size-topic-preferred: 30px;
    --font-size-body-preferred: 17px;
    --font-size-button-preferred: 20px;
  
    --font-size-topic-min: 18px;
    --font-size-topic-max: 32px;
  
    --font-size-body-min: 16px;
    --font-size-body-max: 20px;
  
    --font-size-button-min: 18px;
    --font-size-button-max: 22px;
  
    --margin-top-body: 10px;
    --margin-desc-button: 32px;
  
    --margin-top-body-ratio: 12 / 812;
    --margin-desc-button-ratio: 32 / 812;
  
    --button-width-ratio: 335 / 375;
    --button-height-ratio: 56 / 812;
    --button-padding-top-ratio: 19 / 812;
    --button-padding-left-ratio: 30 / 375;
  
    --circle-top-ratio: 260 / 812;
    --circle-left-ratio: 107 / 375;
  
    --loading-text-top-ratio: 268 / 812;
    --ending-text-top-ratio: 380 / 812;
    --loading-progress-top-ratio: 268 / 812;
    --loading-sandy-top-ratio: 55 / 812;
    --loading-symbol-top-ratio: 76 / 812;
    --loading-symbol-width-ratio: 56.5 / 375;
    --loading-symbol-height-ratio: 76 / 375;
    --loading-symbol-width: 56.5px;
    --loading-symbol-height: 76px;
    --loading-content-top-ratio: 24 / 812;
    --progress-bar-bottom-ratio: 70 / 812;

    --unsupported-content-top-ratio: 267 / 812;
    --unsupported-text-left-ratio: 32 / 375;
    --unsupported-text-right-ratio: 70 / 375;
  
    --error-logo-top-ratio: 196 / 812;
  
  }
  
  .logo-container {
    width: calc(var(--logo-width-ratio) * 100vw);
    height: calc(var(--logo-height-ratio) * 100vh);
    top: calc(var(--logo-top-ratio) * 100vh);
    left: calc(var(--logo-left-ratio) * 100vw);
    position: absolute;
    z-index: 999;
  }
  
  .logo-container img {
    width: 100%;
    height: auto;
  }
  
  .gradient-container {
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
  }
  
  .gradient-container img{
    width: 100%;
    height: auto;
  }
  
  .gradient-container::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(0deg, rgba(0, 0, 0, 0.90) 22.71%, rgba(7, 7, 9, 0.00) 54.38%);
    z-index: 2;
  }
  
  .description-container {
    position: absolute;
    display: inline-flex;
    flex-direction: column;
    padding: 0 1rem;
    bottom: calc(var(--desc-buttom-ratio) * 100vh);
    left: calc(var(--desc-left-ratio) * 100vw);
    box-sizing: border-box;
    text-align: center;
    color: #FFFFFF;
    font-family: 'Poppins';
    justify-content: center;
    align-items: center;
    z-index: 999;
    width: calc(var(--desc-width-ratio) * 100vw);
  }
  
  .topic,
  .body,
  .start-button {
    display: inline-block;
    text-align: center;
  }
  
  .topic {
    font-weight: 700;
    font-size: clamp(var(--font-size-topic-min), var(--font-size-topic-preferred), var(--font-size-topic-max));
    line-height: normal;
    font-style: normal;
  }
  
  .body {
    font-weight: 400;
    font-size: clamp(var(--font-size-body-min), var(--font-size-body-preferred), var(--font-size-body-max));
    line-height: 140%;
    color: #EDEDED;
    margin-top: var(--margin-top-body);
    font-style: normal;
    font-family: 'Poppins';
  }
  
  .start-button {
    display: flex;
    width: calc(var(--button-width-ratio) * 100vw);
    /* width: 335px; */
    height: auto;
    /*padding: calc(var(--button-padding-top-ratio) * 100vh) calc(var(--button-padding-left-ratio) * 100vw);*/
    padding: 19px 30px;
    border-radius: 99px;
    justify-content: center;
    align-items: center;
    gap: 10px;
    font-family: 'Poppins';
    font-weight: 600;
    font-size: clamp(var(--font-size-button-min), var(--font-size-button-preferred), var(--font-size-button-max));
    line-height: 1.4;
    color: #EDEDED;
    background-color: #00A990;
    border: none;
    cursor: pointer;
    margin-top: calc(var(--margin-desc-button-ratio) * 100vh);
    font-style: normal;
  }
  
  .alert-popup {
    position: absolute;
    left: 50%;
    top: calc(var(--alert-top-ratio) * 100vh);
    width: calc(var(--alert-width-ratio) * 100vw);
    transform: translate(-50%, -50%);
    background-color: #202020;
    color: #EFEFEF;
    font-family: Inter;
    font-size: 14px;
    font-style: normal;
    font-weight: 500;
    line-height: 150%;
    padding: 20px 16px;
    border-radius: 10px;
    text-align: center; 
    z-index: 999;
  }
  
  .blur {
    filter: blur(40px);
  }
  
  .loading-container {
    display: none;
    width: 100%;
    height: 100vh;
    flex-direction: column;
    transition: opacity 0.3s ease;
  }
  
  .loading-container.show {
    display: flex;
    opacity: 1;
    pointer-events: auto;
    background: linear-gradient(180deg, #83C8D1 -33.07%, #FFF 34.97%, #FFF 82.88%);
  }
  
  .loading-logo-container{
    left: calc(var(--logo-left-ratio) * 100vw);
    width: 100%;
    padding-top: calc(var(--logo-top-ratio) * 100vh);
  }
  
  .loading-logo-container img{
    width: calc(var(--logo-width-ratio) * 100vw);
    margin: auto;
    display: block;
  }
  
  .loading-content-container {
    padding-top: calc(var(--loading-content-top-ratio) * 100vh);
    }
  
  .loading-slide-container {
    position: relative;
    overflow: hidden;
  }
  
  .loading-slide-container .slider {
    height: 100%;
    white-space: nowrap;
    font-size: 0;
  }
  
  .loading-slide-container .slider > * {
    font-size: 1rem;
    display: inline-block;
    white-space: normal;
    vertical-align: top;
    height: 100%;
    width: 100%;
    background: none 50% no-repeat;
    background-size: cover;
  }
  
  #s1:target ~ .slider {transform: translateX(   0%); -webkit-transform: translateX(   0%);}
  #s2:target ~ .slider {transform: translateX(-100%); -webkit-transform: translateX(-100%);}
  #s3:target ~ .slider {transform: translateX(-200%); -webkit-transform: translateX(-200%);}
  
  .loading-slide-container .slider .loading-text-container {
    color: rgba(0, 133, 113, 1);
    font-family: 'Poppins';
    text-align: center;
    z-index: 2;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    margin: auto;
  }
  
  .loading-slide-container .slider .loading-image-container {
    width: 100%;
    display: block;
    padding-top: 48px;
  }
  
  .loading-slide-container .slider .loading-image-container img{
    width: 300px;
    height: auto;
    margin: auto;
    display: block;
  }
  
  .loading-slide-container .slider .loading-title, .loading-body{
    display: inline-block;
    text-align: center;
  }
  
  .loading-slide-container .slider .loading-title{
    font-weight: 600;
    font-size: 26px;
    line-height: 36.4px;
  }
  
  .loading-slide-container .slider .loading-body {
    font-weight: 400;
    font-size: 16px;
    line-height: 22.4px;
    color: rgba(0, 133, 113, 1);
    margin-top: 8px;
  }
  
  @keyframes slide {
    0%, 25% { transform: translateX(0%); }
    33.33%, 58.33% { transform: translateX(-100%); }
    66.66%, 99.99% { transform: translateX(-200%); }
    100% { transform: translateX(0%); }
  }
  
  .slider-animation {
    animation: slide 15s infinite;
  }
  
  #s1:target ~ .slider {transform: translateX(0%);}
  #s2:target ~ .slider {transform: translateX(-100%);}
  #s3:target ~ .slider {transform: translateX(-200%);}
  
  .progress-container {
    width: 100%;
    bottom: 3%;
    position: absolute;
    height: 50px; 
  }
  
  .progress-bar {
    width: 334px;
    height: 5px;
    background-color: #EDEDED;
    border-radius: 5px;
    overflow: hidden;
    /* z-index: 2; */
    margin: auto;
    display: block;
  }
  
  .progress {
    width: 0;
    height: 100%;
    background-color: #00A990;
    transition: width 10s linear;
    background: linear-gradient(0.25turn, #00E2C1, #00B0D7);
    z-index: 2;
  }
  
  .progress-container .progress-text {
    color: var(--subtext, #818181);
    text-align: center;
    font-family: Poppins;
    font-size: 14px;
    font-style: normal;
    font-weight: 400;
    line-height: 140%;
    margin-top: 12px;
  }
  
  .ending-container {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: #6A6A6A;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    /* z-index: 9999; */
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }
  
  .ending-container.show {
    display: flex;
    opacity: 1;
    pointer-events: auto;
  }
  
  .ending-bg-container {
    position: absolute; 
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(56, 57, 60, 0.75);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px); /* from iOS 9 version*/
    z-index: 1; 
  }
  
  .ending-sandy-container img {
    position: relative;
    top: calc(55 / 812 * 100vh);
    top: calc(var(--loading-sandy-top-ratio) * 100vh);
    width: 100%;
    height: auto;
  }
  
  .loader {
    display: flex;
    position: absolute;
    top: calc(var(--circle-top-ratio) * 100vh);
    left: 0;
    right: 0;
    width: 80px;
    height: 80px;
    margin: auto;
    z-index: 1000;
  }
  
  .loader:before {
    content: '';
    display: flex;
  }
  
  .circular {
    -webkit-animation: rotate 2s linear infinite;
    animation: rotate 2s linear infinite;
    height: 100%;
    -webkit-transform-origin: center center;
    -ms-transform-origin: center center;
    transform-origin: center center;
    width: 100%;
    position: absolute;
    margin: auto;
  }
  
  .ending-text-container {
    position: absolute;
    top: calc(var(--circle-top-ratio) * 100vh + 120px);
    color: #FFFFFF;
    font-family: 'Poppins';
    font-size: 16px;
    padding: 0 60px;
    text-align: center;
    z-index: 2;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    /* width:100%; */
  }
  
  .path {
    stroke-dasharray: 1, 200;
    stroke-dashoffset: 0;
    -webkit-animation: dash 1.5s ease-in-out infinite;
    animation: dash 1.5s ease-in-out infinite;
    stroke-linecap: round;
    stroke: url(#gradient);
  }
  
  @-webkit-keyframes rotate {
    100% {
      -webkit-transform: rotate(360deg);
      transform: rotate(360deg);
    }
  }
  
  @keyframes rotate {
    100% {
      -webkit-transform: rotate(360deg);
      transform: rotate(360deg);
    }
  }
  
  @-webkit-keyframes dash {
    0% {
      stroke-dasharray: 1, 200;
      stroke-dashoffset: 0;
    }
    50% {
      stroke-dasharray: 89, 200;
      stroke-dashoffset: -35;
    }
    100% {
      stroke-dasharray: 89, 200;
      stroke-dashoffset: -124;
    }
  }
  
  @keyframes dash {
    0% {
      stroke-dasharray: 1, 200;
      stroke-dashoffset: 0;
    }
    50% {
      stroke-dasharray: 89, 200;
      stroke-dashoffset: -35;
    }
    100% {
      stroke-dasharray: 89, 200;
      stroke-dashoffset: -124;
    }
  }
  
  .error-container {
    position: relative;
    display: none;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: #F4F4F4;
    display: flex;
    flex-direction: column;
  }
  
  .error-container.show {
    display: flex;
    opacity: 1;
    pointer-events: auto;
  }
  
  .error-content-container {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    z-index: 2;
    position: absolute;
    top: calc(var(--error-logo-top-ratio) * 100vh);
    padding-left: 24px;
    }
  
  .error-logo-container{
    margin-bottom: 32px;
  }
  
  .error-logo-container img{
    width: 105px;
    height: 44px;
  }
  
  .error-text-container {
    font-family: "Pretendard";
    font-style: normal;
  }
  
  .error-title, .error-body{
    display: inline-block;
  }
  
  .error-title{
    color: var(--black900, #222);
    font-weight: 800;
    font-size: 36px;
    line-height: normal;
    margin-bottom: 16px;
  }
  
  .error-body {
    color: var(--black800, #3A3A3A);
    font-weight: 400;
    font-size: 16px;
    font-style: normal;
    line-height: 150%;
  }
  
  .error-symbol-container{
    position: absolute;
    top: 309px;
    right: 0px;
  }
  
  .error-symbol-container img{
    width: 284px;
    height: auto;
  }

  .not-supported-browser-container {
    display: flex;
    opacity: 1;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: #6A6A6A;
    display: flex;
    flex-direction: column;
    justify-content: center;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }
  .not-supported-browser-container.show {
    display: flex;
    opacity: 1;
    pointer-events: auto;
  }
  .not-supported-browser-bg-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(56, 57, 60, 0.75);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px); /* from iOS 9 version*/
    z-index: 1; 
  }
  .not-supported-browser-sandy-container {
    position: relative;
    top: calc(var(--loading-sandy-top-ratio) * 100vh);
  }
  .not-supported-browser-sandy-container img {
    width: 100%;
    height: auto;
  }
  .not-supported-browser-content-container {
    display: flex;
    flex-direction: column;
    z-index: 2;
    position: absolute;
    top: calc(var(--unsupported-content-top-ratio) * 100vh);
    left: calc(var(--unsupported-text-left-ratio) * 100vw);
    right: calc(var(--unsupported-text-right-ratio) * 100vw);
    }
  .not-supported-browser-logo-container{
    margin-bottom: 48px;
  }
  .not-supported-browser-logo-container img{
    width: 135px;
    height: auto;
  }
  .not-supported-browser-text-container {
    color: #FFFFFF;
    font-family: 'Pretendard';
    z-index: 2;
    display: inline-flex;
    flex-direction: column;
  }
  .not-supported-browser-title, .not-supported-browser-body{
    display: inline-block;
  }
  .not-supported-browser-title{
    font-size: 36px;
    font-weight: 700;
    line-height: normal;
  }
  .not-supported-browser-body {
    font-weight: 400;
    font-size: 16px;
    line-height: 150%;
    margin-top: 16px;
  }
  .underlined-text {
    text-decoration-line: underline;
  }
  
  #unity-wrapper {
    visibility: hidden;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    justify-content: center;
    align-items: center;
  }
  #unity-container { position: absolute; display: block;}
  #unity-container.unity-desktop { left: 50%; top: 50%; transform: translate(-50%, -50%) }
  #unity-container.unity-mobile { position: fixed; width: 100%; height: 100% }
  .unity-mobile #unity-canvas { width: 100%; height: 100% }