* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body, html {
  width: 100vw;
  height: 100vh;
  background-color: #000B;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Poppins", sans-serif;
  position: relative;
  overflow: hidden;
  transition: background-color 0.5s ease;
}

main {
  width: 60vw;
  height: 70vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 15px;
  color: lightcyan;
  transition: transform 0.3s ease;
}

#stopwatchTimer {
  font-size: 60px;
  font-weight: 600;
  transition: opacity 0.5s ease, transform 0.5s ease;
  opacity: 1;
}

#date {
  font-size: 20px;
  font-weight: 500;
  transition: color 0.3s ease;
}

#menu-btn {
  padding: 10px;
  color: white;
  position: absolute;
  font-weight: bold;
  top: 10px;
  right: 10px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  cursor: pointer;
  z-index: 30;
  transition: background-color 0.3s ease, transform 0.3s ease;
}

#menu-btn:hover {
  background-color: rgba(255, 255, 255, 0.3);
  transform: scale(1.05);
}

#menu-div {
  z-index: 10;
  width: 30vw;
  height: 100vh;
  position: absolute;
  top: 0;
  right: -30vw; /* Initially off-screen to the right */
  background-color: rgba(0, 0, 0, 0.8);
  opacity: 0;
  transition: transform 0.3s ease, opacity 0.3s ease; /* Smooth sliding */
  padding: 15vh 2vw;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 20px;
  align-items: flex-start;
}

#menu-div.show {
  transform: translateX(-30vw); /* Move into view */
  opacity: 1; /* Fade in */
}

#menu-div i {
  position: absolute;
  top: 10px;
  right: 10px;
  transition: transform 0.3s ease;
}

#close-btn {
  font-weight: bold;
  z-index: 20;
  padding: 10px;
  position: absolute;
  top: 10px;
  right: 10px;
  color: white;
  background-color: rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  cursor: pointer;
  display: none;
  transition: background-color 0.3s ease;
}

#close-btn:hover {
  background-color: rgba(255, 255, 255, 0.3);
}

#menu-div a {
  text-decoration: none;
  color: white;
  font-size: 24px;
  transition: color 0.3s ease;
}

#menu-div a:hover {
  border-bottom: 2px solid white;
}

#stopwatchBtn {
  padding: 10px 35px;
  background-color: lightgreen;
  border: none;
  font-weight: 600;
  border-radius: 24px;
  cursor: pointer;
  font-size: 14px;
  transition: background-color 0.3s ease, transform 0.3s ease;
}

#stopwatchBtn.active {
  background-color: crimson;
}

#stopwatchBtn:hover {
  transform: scale(1.05);
}

.swbtns {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: center;
}

#resetBtn {
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  font-weight: bold;
  border: none;
  background-color: salmon;
  cursor: pointer;
  font-size: 16px;
  transition: background-color 0.3s ease, transform 0.3s ease;
}

#resetBtn:hover {
  background-color: darksalmon;
  transform: scale(1.1);
}