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HTML 

              
                <div class="container">
    <div class="casio-f91w">
      <div class="top bracelet">
        <div class="first band"></div>
        <div class="second band"></div>
      </div>
      <div class="core-watch-container">
        <div class="buttons-container">
          <div class="left top button-notch"></div>
          <div class="button"></div>
          <div class="space"></div>
          <div class="left bottom button-notch"></div>
          <div class="button"></div>
        </div>
        <div class="core-watch">
          <div class="crystal-screen">
            <div class="color-border">

              <div class="lcd-screen">
                <div class="top">
                  <div class="brand text-white">CASIO</div>
                  <div class="model text-yellow font-cursive">F-91W</div>
                </div>
                <div class="center">
                  <div class="inner-top">
                    <div class="action text-white font-small"><span class="left arrow">◀</span> LIGHT</div>
                    <div class="chronograph text-yellow font-small">ALARM CHRONOGRAPH</div>
                  </div>
                  <div class="inner-center">
                    <div class="lcd-top">
                      <span class="timemode">24H</span>
                      <span class="weekday mini">--</span>
                      <span class="day mini">--</span>
                    </div>
                    <div class="lcd-bottom">
                      <span class="time">
                        <span class="hours">--</span>
                        <span class="sep">:</span>
                        <span class="minutes">--</span>
                      </span>
                      <span class="seconds mini">--</span>
                    </div>
                  </div>
                  <div class="inner-bottom">
                    <div class="mode text-white font-small"><span class="left arrow">◀</span> MODE</div>
                    <div class="alarm text-white font-small">ALARM ON-OFF/24HR <span class="right arrow">▶</span></div>
                  </div>
                </div>
                <div class="bottom">
                  <div class="water text-white font-medium">WATER</div>
                  <div class="wr-box text-red"><span>W<span class="r">R</span></span></div>
                  <div class="resist text-white font-medium">RESIST</div>
                </div>
              </div>

            </div>
          </div>
        </div>
        <div class="buttons-container">
          <div class="right top button-notch"></div>
          <div class="space"></div>
          <div class="right bottom button-notch"></div>
          <div class="button"></div>
        </div>
      </div>
      <div class="bottom bracelet">
        <div class="first band"></div>
        <div class="second band"></div>
      </div>
    </div>
  </div>

<div class="created">
  <span>Created by</span>
  <a href="https://manz.dev/"><h2>Manz.dev</h2></a>
  <p>on <a href="https://twitch.tv/ManzDev">Twitch</a> / <a href="https://youtu.be/QxQnaqEyhyU">Youtube</a></p>
</div>
!

CSS 

              
                @use postcss-nested;

@import url('https://fonts.googleapis.com/css2?family=Gidugu&family=Michroma&display=swap');

@font-face {
  font-family: "DSEG7 Classic";
  src:
    url(https://manzdev.github.io/twitch-casio/dseg7-bold.woff2) format("woff2"),
    url(https://manzdev.github.io/twitch-casio/dseg7-bold.woff) format("woff");
  font-display: swap;
}

@font-face {
  font-family: "DSEG14 Classic";
  src:
    url(https://manzdev.github.io/twitch-casio/dseg14-bold.woff2) format("woff2"),
    url(https://manzdev.github.io/twitch-casio/dseg14-bold.woff) format("woff");
  font-display: swap;
}

:root {
  --model-color: #333;
  --band-color: #3475b1;
  --white-color: #d3d2d4;
  --yellow-color: #cca25d;
  --lcd-background-color: #dededc;
  --lcd-color: #181921;
  --red-color: #7d3925;
  --led-color: #84fd03;
  --lcd-font: "DSEG7 Classic", monospace;
  --shine-gradient: linear-gradient(40deg, #fff0 15%, #fff2 30%, #fff6 50%, #fff2 70%, #fff0 85%);
  --casio-border-radius: 11% / 25%;
  --casio-shape: polygon(0 20%, 10% 0, 90% 0, 100% 20%, 100% 80%, 90% 100%, 10% 100%, 0 80%);
  --button-notch-shape: polygon(100% 0, 100% 100%, 0 90%, 0 10%);
}

body {
  margin: 0;
  font-family: Michroma, sans-serif;
  font-weight: bold;
  transition: background 0.2s ease;
}

body.off {
  background: #111;
}

.casio-f91w, .container {
  pointer-events: none;
  user-select: none;
}

.container {
  display: flex;
  justify-content: center;
}

/* Utility classes */

.text-white {
  color: var(--white-color);
}

.text-yellow {
  color: var(--yellow-color);
}

.text-red {
  color: var(--red-color);
}

.font-cursive {
  font-family: sans-serif;
  font-style: italic;
  font-weight: bolder;
  font-size: 15px;
  letter-spacing: 1px;
  transform: scale(1, 0.8);
}

.font-small {
  font-size: 6px;
  letter-spacing: 1px;
}

.font-medium {
  font-size: 11px;
}

span.arrow {
  display: inline-block;
  color: var(--red-color);
  transform: scale(2, 0.75) translateX(var(--x));
}

span.arrow.left {
  --x: -1px;
}

span.arrow.right {
  --x: 1px;
}

.mini {
  font-size: 23px;
}

.casio-f91w {
  --width: 320px;
  --height: 270px;

  display: flex;
  flex-direction: column;
  align-items: center;

  & .bracelet {
    width: 73%;
    height: 150px;
    background: #333;
    clip-path: polygon(0 0, 100% 0, 90% 100%, 10% 100%);

    &.top {
      transform: scaleY(-1);
    }

    & .band {
      &.first {
        height: 45px;
        box-shadow: 0 3px 8px 3px #111;
      }

      &.second {
        height: 10px;
        background: linear-gradient(#111, transparent, #444);
        transform: translateY(45px);
        position: relative;
        display: flex;
        justify-content: center;

        &::after {
          content: "";
          display: block;
          background: linear-gradient(#111 10%, #222 23%, #333 50%, #444 75%, #555 95%);
          width: 50%;
          height: 20px;
          position: absolute;
          transform: translateY(-5px);
          border-radius: 25px;
        }
      }
    }

    &.top {
      background: #555;

      & .band {
        &.first {
          box-shadow: 0 3px 3px 3px #666;
          background: #444;
        }

        &.second {
          background: linear-gradient(#444 0 30%, #111 75% 100%);

          &::after {
            background-color: #444;
            transform: scaleY(0.8) translateY(-6px);
            background-image: linear-gradient(#444 0 30%, #333 60%, #111 75% 100%);
          }
        }
      }
    }
  }

  & .core-watch-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: calc(var(--width) * 1.1);

    & .button-notch {
      width: 8px;
      height: 60px;
      background: #262626;
      clip-path: var(--button-notch-shape);

      &+.button {
        width: 18px;
        height: 20px;
        border: 1px solid #989f7c;
        border-radius: 2px;
        position: absolute;
        z-index: -1;
        background: linear-gradient(to bottom, #fbfbfa 30%, #4f4a42 60%, #aea084);
        pointer-events: all;
      }

      &.right+.button {
        transform: translate(0, -40px);
      }

      &.left+.button {
        transform: translate(-12px, -40px);
      }

      &.left {
        transform: translateX(1px);
      }

      &.right {
        transform: translateX(-1px) scaleX(-1);
      }
    }

    & .space {
      height: 15px;
    }
  }

  & .core-watch {
    width: var(--width);
    height: var(--height);
    background-color: var(--model-color);
    clip-path: var(--casio-shape);
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow:
      0 -2px 0 0 #555 inset,
      0 -3px 0 1px #222 inset,
      0 2px 0 0 #222 inset,
      0 3px 0 1px #555 inset;
  }

  & .crystal-screen {
    width: calc(var(--width) * 0.85);
    height: calc(var(--height) * 0.85);
    background: #111;
    border-radius: var(--casio-border-radius);
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
    box-shadow:
      0 0 2px 2px #444,
      0 0 0 5px #222,
      0 0 7px 7px #111;

    &::after {
      content: "";
      display: block;
      background: var(--shine-gradient);
      width: 100%;
      height: 100%;
      position: absolute;
    }
  }

  & .color-border {
    width: calc(var(--width) * 0.8);
    height: calc(var(--height) * 0.8);
    border-radius: var(--casio-border-radius);
    box-shadow:
      0 0 0 4px var(--band-color) inset,
      0 0 0 8px #000 inset,
      0 0 0 10px #eee inset;
  }

  & .lcd-screen {
    display: flex;
    flex-direction: column;
    align-items: center;

    & .top {
      margin-top: 12px;
      display: flex;
      justify-content: space-evenly;
      align-items: center;
      width: calc(var(--width) * 0.7);
      border-bottom: 2px solid var(--band-color);
      padding-bottom: 4px;
    }

    & .center {
      display: flex;
      flex-direction: column;
      align-items: center;
      width: calc(var(--width) * 0.65);

      & .inner-top {
        display: flex;
        justify-content: space-between;
        padding-top: 4px;
        width: 90%;
      }

      & .inner-center {
        font-family: var(--lcd-font);
        font-size: 38px;
        width: calc(var(--width) * 0.6);
        height: 75px;
        background: var(--lcd-background-color);
        color: var(--lcd-color);
        border-radius: 10px;
        box-shadow:
          0 0 0 4px #000,
          0 0 0 5px var(--white-color);
        margin: 10px 0;
        padding-top: 10px;
        display: flex;
        flex-direction: column;
        transition: background-image 0.25s;
        position: relative;

        &::before {
          content: "";
          display: block;
          background: linear-gradient(#292928 50%, transparent);
          border-radius: 8px 8px 0 0;
          width: 100%;
          height: 10px;
          position: absolute;
          top: 0;
        }

        &.on {
          background:
            radial-gradient(circle at 0 50%, var(--led-color) 40%, transparent 60%),
            linear-gradient(#999 8%, var(--lcd-background-color) 11%);
        }

        & .lcd-top {
          display: flex;
          justify-content: space-around;

          & .timemode {
            font-family: sans-serif;
            font-size: 10px;
            align-self: flex-end;
            transform: translate(20px);
          }

          & .weekday {
            font-family: "DSEG14 Classic", monospace;
          }

          & .day {
            transform: translateX(5px);
          }
        }

        & .lcd-bottom {
          display: flex;
          justify-content: center;
          padding-top: 5px;

          & .time {
            display: flex;
          }

          & .seconds {
            align-self: flex-end;
          }
        }
      }

      & .inner-bottom {
        display: flex;
        justify-content: space-evenly;
        width: calc(var(--width) * 0.8);
      }
    }

    & .bottom {
      display: flex;
      justify-content: space-around;
      width: calc(var(--width) * 0.7);

      & .water,
      & .resist {
        align-self: flex-end;
      }

      & .water::before,
      & .resist::before {
        content: "";
        display: block;
        border-top: 2px solid var(--band-color);
        width: 130%;
        transform: translate(-8px, 0);
      }

      & .resist::before {
        transform: translate(-10px, 0);
      }

      & .wr-box {
        letter-spacing: -3px;
        border: 2px solid var(--band-color);
        padding: 0 16px 0 10px;
        border-radius: 5px 5px 20px 20px / 5px 5px 30px 30px;
        transform: translate(0, 8px);

        &>span {
          display: inline-block;
          transform: translate(0, -2px);
        }

        & .r {
          font-style: italic;
        }
      }
    }
  }
}

.buttons-container {
    position: relative;
    z-index: 10;
}

.created {
  background: 
    url(https://assets.codepen.io/154065/internal/avatars/users/default.png),
    linear-gradient(to bottom, #884ced, #ec1cce);
  background-size: 75px 75px, cover;
  background-repeat: no-repeat;
  position: absolute;
  top: 0;
  right: 0;
  width: 250px;
  height: 75px;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-left: 2em;
  
  & span,
  & h2,
  & p,
  & a {
    font-family: Montserrat;
    margin: 0;
  }
  
  & a,
  & p,
  & span {
    color: #fff;    
  }
  
  & h2 {
    font-weight: 700;
    transform: translate(0, -4px);    
  }
  
  & a {
    text-decoration-color: rgba(255,255,255,0.4);
  }
  
  & a:hover {
    color: #e6e82a;
  }
}
!

JS 

              
                const WEEKDAY = ["SU", "MO", "TU", "WE", "TH", "FR", "SA"];

const dom = {
  day: document.querySelector(".day"),
  weekday: document.querySelector(".weekday"),
  hours: document.querySelector(".hours"),
  minutes: document.querySelector(".minutes"),
  seconds: document.querySelector(".seconds"),
  innerCenter: document.querySelector(".inner-center")
};

const buttons = {
  leftTop: document.querySelector(".button-notch.left.top + .button"),
  leftBottom: document.querySelector(".button-notch.left.bottom + .button"),
  rightBottom: document.querySelector(".button-notch.right.bottom + .button")
};

buttons.leftTop.addEventListener("mousedown", () => {
  dom.innerCenter.classList.add("on");
  document.body.classList.add("off");
});

buttons.leftTop.addEventListener("mouseup", () => {
  dom.innerCenter.classList.remove("on");
  document.body.classList.remove("off");
});

const updateClock = () => {
  const date = new Date();
  dom.day.textContent = date.getDate();
  dom.weekday.textContent = WEEKDAY[date.getDay()];
  dom.hours.textContent = String(date.getHours()).padStart(2, "0");
  dom.minutes.textContent = String(date.getMinutes()).padStart(2, "0");
  dom.seconds.textContent = String(date.getSeconds()).padStart(2, "0");
};

setInterval(updateClock, 1000);
!
999px

Console