body {
        margin: 0;
        padding: 0;
        background-color: #202020;
        overflow: auto;
      }

      html {
        background-color: #202020;
      }

      .image-container {
          display: flex;
          justify-content: flex-start;
          margin: 5px 0;                
      }
     .image-container a:first-child {
          margin-left: 14px;
      }
     .image-container a:not(:first-child) {
          margin-left: 25px;
      }
      .container {
        display: flex;
        flex-direction: column;
        height: 100vh;
        background-color: #202020;
        flex-shrink: 0;
      }
      .part {
        display: flex;
        justify-content: center;
        max-width: 100vw;
        padding: 5px;
        box-sizing: border-box;
      }
      .part:nth-child(1) {
        background-color: #202020;
        flex-shrink: 0;
        flex-basis: auto;       
        justify-content: left;
        position: sticky;
        top: 0;
        z-index: 100;
        padding-top: 5px;
        padding-left: calc(5px + env(safe-area-inset-left, 0px));
        padding-right: calc(5px + env(safe-area-inset-right, 0px));
      }
      .part:nth-child(2) {
        background-color: #f0f0f0;   
        flex-basis: auto;
        border-radius: 10px 10px 0 0;
        border-bottom: 3px solid #ee7e18;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        font-family: sans-serif;
        font-size: clamp(1.7vw, 2.7vw, 30px)
      }
      .part:nth-child(3) {
        background-color: #f0f0f0;
        display: flex;
        flex-direction: row;
        font-family: sans-serif;
        font-size: 30px;
        flex-basis: auto;
        padding: 3px;
      }
      .part:nth-child(3) > div {
        flex: 1;
        padding: 10px;
        box-sizing: border-box;
      }
      .part:nth-child(3) .left {
        background-color: #f0f0f0;
        display: flex;
        position: relative;
        justify-content: center;
        align-items: center;
        min-height: 350px;
      }
      .part:nth-child(3) .right {
        background-color: #f0f0f0;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: left;
      }
        .part:nth-child(4) {
        background-color: #f0f0f0;
       font-family: sans-serif;
       font-size: 30px;
        flex-basis: auto;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        border-radius: 0 0 10px 10px;
        border-top: 3px solid #ee7e18;
      }
      .part:nth-child(5) {
        background-color: #202020;
        flex-grow: 1;
        display: flex;
        align-items: flex-start;
        font-size: 16px;
        color: #ee7e18;
        padding: 15px;
      }
      
      @media (orientation: portrait) {
        .part:nth-child(3) {
          flex-direction: column;
        }
        .part:nth-child(3) > div {
         flex: 1; 
        }
      .part:nth-child(3) .right {
       align-items: center;
      }
      }

       @media (orientation: landscape) {
        .part:nth-child(3) {
          flex-direction: row;
        }
        .part:nth-child(3) > div {
          flex: initial;
          width: 100%;
        }
      }

       #circle {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 180px;
        height: 180px;
        border: 3px solid #808080;
        border-radius: 50%;
      }
       #container_wind {
        width: 200px;
        height: 200px;
        position: absolute;
        top: 0%;
        left: 0%;        
        transition: transform 2s ease-in-out;     
      }
       #container_main {
        width: 200px;
        height: 200px;
        position: absolute;
        top: 55%;
        left: 50%;
        display: flex;
        justify-content: center;
        align-items: center;
        transform: translate(-50%, -50%);
        align-self: flex-start;
      }
       #triangle {
        width: 0;
        height: 0;
        border-left: 10px solid transparent;
        border-right: 10px solid transparent;
        border-top: 30px solid #ee7e18;
        position: absolute;
        top: 0%;
        left: 50%;
        transform: translateX(-50%);
      }
       #vpp {
        width: 150px;
        height: 15px;
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%) rotate(96deg);
        background-color: #808080;
      }
       #line {
        width: 110px;
        height: 0;
        border-top: 3px dashed white;
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%) rotate(96deg);
      }
       #num1 {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%) rotate(-90deg) translate(1px, 67px);
        font-size: 14px;
        font-weight: bold;
        color: white;
      }
       #num2 {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%) rotate(90deg) translate(-1px, 67px);
        font-size: 14px;
        font-weight: bold;
        color: white;
      }
       #text_n {       
        position: absolute;
        top: -9%;
        left: 50%;
        transform: translate(-50%, -50%) rotate(0deg);
        font-size: 22px;
        font-weight: bold;
        color: #ee7e18;        
      }
       #line_n {
        width: 10px;
        height: 3px;
        position: absolute;
        top: -1%;
        left: 50%;
        transform: translate(-50%, -50%) rotate(90deg);
        background-color: #808080;
      }
       #text_s {        
        position: absolute;
        bottom: -23%;
        left: 51%;
        transform: translate(-50%, -50%) rotate(0deg);
        font-size: 22px;
        font-weight: bold;
        color: #ee7e18;       
      }
       #line_s {
        width: 10px;
        height: 3px;
        position: absolute;
        bottom: -3%;
        left: 50%;
        transform: translate(-50%, -50%) rotate(90deg);
        background-color: #808080;
      }
       #text_e {        
        position: absolute;
        bottom: 37%;
        right: -17%;
        transform: translate(-50%, -50%) rotate(0deg);
        font-size: 22px;
        font-weight: bold;
        color: #ee7e18;       
      }
       #line_e {
        width: 10px;
        height: 3px;
        position: absolute;
        bottom: 48.5%;
        right: -6%;
        transform: translate(-50%, -50%) rotate(0deg);
        background-color: #808080;
      }
       #text_w {        
        position: absolute;
        bottom: 37%;
        left: -8%;
        transform: translate(-50%, -50%) rotate(0deg);
        font-size: 22px;
        font-weight: bold;
        color: #ee7e18;       
      }
       #line_w {
        width: 10px;
        height: 3px;
        position: absolute;
        bottom: 48.5%;
        left: -1%;
        transform: translate(-50%, -50%) rotate(0deg);
        background-color: #808080;
      }
        .container_menu {
			position: fixed;
			top: 0;
			left: 0;
			width: 100%;
			height: calc(50px + env(safe-area-inset-top, 0px));
			padding-top: env(safe-area-inset-top, 0px);
			padding-left: env(safe-area-inset-left, 0px);
			padding-right: env(safe-area-inset-right, 0px);
			box-sizing: border-box;
			background-color: #202020;
			transform: translateY(-100%);
			opacity: 0;
			visibility: hidden;
			pointer-events: none;
			transition: transform 0.5s ease-in-out, opacity 160ms ease-out,
				visibility 0s linear 0.5s;
			isolation: isolate;
                  z-index: 9999;
		}
		.container_menu::before {
			content: "";
			position: absolute;
			left: 0;
			right: 0;
			top: -100px;
			bottom: 0;
			background-color: #202020;
			z-index: 0;
		}
		.container_menu > * {
			position: relative;
			z-index: 1;
		}
		.container_menu.show {
			transform: translateY(0);
			opacity: 1;
			visibility: visible;
			pointer-events: auto;
			transition-delay: 0s;
		}
		body.compact-menu-visible .container > .part:nth-child(1) {
			visibility: hidden;
		}

      /* On touch phones and tablets the header follows the SAC Portal model:
         the full logo row belongs to the document, while a separate compact
         bar appears only after the main SibAeroCraft logo reaches it. */
      html.mobile-compact-enabled {
        scroll-padding-top: calc(env(safe-area-inset-top, 0px) + 62px);
      }

      html.mobile-compact-enabled .container > .part:nth-child(1) {
        position: relative;
        top: auto;
        z-index: auto;
        padding-top: calc(9px + env(safe-area-inset-top, 0px));
      }

      html.mobile-compact-enabled .container_menu {
        height: calc(env(safe-area-inset-top, 0px) + 54px);
        padding: 0;
        background: transparent;
        opacity: 0;
        visibility: hidden;
        transform: none;
        transition: opacity 160ms ease-out, visibility 0s linear 160ms;
        pointer-events: none;
        isolation: auto;
      }

      html.mobile-compact-enabled .container_menu::before {
        inset: 0;
        box-sizing: border-box;
        background: rgba(246, 247, 249, 0.06);
        -webkit-backdrop-filter: blur(4px) saturate(1.05);
        backdrop-filter: blur(4px) saturate(1.05);
        border-bottom: 0.5px solid rgba(40, 45, 50, 0.08);
      }

      @media (prefers-color-scheme: dark) {
        html.mobile-compact-enabled .container_menu::before {
          background: rgba(20, 23, 28, 0.05);
          border-bottom-color: rgba(235, 239, 245, 0.08);
        }
      }

      html.mobile-compact-enabled .container_menu.show {
        opacity: 1;
        visibility: visible;
        transform: none;
        transition-delay: 0s;
        pointer-events: auto;
      }

      html.mobile-compact-enabled .container_menu .image-container {
        position: absolute;
        top: calc(env(safe-area-inset-top, 0px) + 16px);
        left: 50%;
        width: auto;
        height: 28px;
        margin: 0;
        transform: translateX(-50%);
      }

      html.mobile-compact-enabled .container_menu .image-container a {
        display: block;
        width: auto;
        height: 28px;
        margin: 0;
      }

      html.mobile-compact-enabled .container_menu .image-container picture {
        display: block;
        width: auto;
        height: 28px;
      }

      html.mobile-compact-enabled .container_menu .image-container img {
        display: block;
        width: auto;
        height: 28px;
        border-radius: 0;
      }

      html.mobile-compact-enabled body.compact-menu-visible .container > .part:nth-child(1) {
        visibility: visible;
      }

      html.mobile-compact-enabled .container > .part:nth-child(1) .image-container {
        transition: opacity 160ms ease-out;
      }

      html.mobile-compact-enabled body.compact-menu-visible .container > .part:nth-child(1) .image-container {
        opacity: 0;
        pointer-events: none;
      }

      html.mobile-compact-enabled .compact-logo-source {
        transition: opacity 160ms ease-out;
      }

      html.mobile-compact-enabled .compact-logo-source.is-compact-source {
        opacity: 0;
        pointer-events: none;
      }

      @media (display-mode: standalone) {
        html.mobile-compact-enabled .container > .part:nth-child(1) {
          padding-top: calc(17px + env(safe-area-inset-top, 0px));
        }
      }

      @media (prefers-reduced-motion: reduce) {
        html.mobile-compact-enabled .container_menu,
        html.mobile-compact-enabled .compact-logo-source,
        html.mobile-compact-enabled .container > .part:nth-child(1) .image-container {
          transition: none;
        }
      }