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

:root {
  --very-dark-blue: #0a0a23;
  --white: #ffffff;
  --yellow: #f1be32;
  --golden-yellow: #feac32;
}

body {
  background-color: var(--very-dark-blue);
  text-align: center;
  color: var(--white);
}

h1 {
  margin: 15px 0 20px;
}

.btn {
  cursor: pointer;
  width: 100px;
  margin: 10px;
  color: var(--very-dark-blue);
  background-color: var(--golden-yellow);
  background-image: linear-gradient(#fecc4c, #ffac33);
  border-color: var(--golden-yellow);
  border-width: 3px;
}

.btn:hover {
  background-image: linear-gradient(#ffcc4c, #f89808);
}

.rules-container {
  padding: 10px 0;
  margin: auto;
  border-radius: 15px;
  border: 5px solid var(--yellow);
  background-color: var(--white);
  color: var(--very-dark-blue);
}

.rules-container ul {
  list-style-type: none;
}

.rules-container p {
  margin: 10px 0;
}

@media (min-width: 760px) {
  .rules-container {
    width: 60%;
  }
}

.score-container {
  display: flex;
  justify-content: space-around;
  margin: 30px 0;
  font-size: 1.2rem;
}

.score {
  font-weight: 500;
}

.results-container {
  font-size: 1.3rem;
  margin: 15px 0;
}

#winner-msg {
  margin-top: 25px;
}

#reset-game-btn {
  display: none;
  margin: 20px auto;
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: 220px;
  background: var(--very-dark-blue);
  border-right: 3px solid var(--golden-yellow);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  box-shadow: 0 0 10px rgba(0,0,0,0.6);
  z-index: 200;
  transition: transform 0.3s ease-in-out;
}

.navbar p {
  color: var(--golden-yellow);
  font-weight: bold;
  text-align: center;
  margin-bottom: 10px;
}

.navbar ul {
  list-style: none;
  padding: 0;
}

.navbar li {
  margin: 12px 0;
}

.navbar a {
  text-decoration: none;
  color: var(--white);
  font-weight: bold;
  padding: 8px 12px;
  border-radius: 8px;
  display: block;
}

.navbar a:hover {
  background: var(--golden-yellow);
  color: var(--very-dark-blue);
  transform: translateX(5px);
}

.content-area {
  margin-left: 240px;
  padding: 20px;
}

.hamburger {
  display: none;
  position: fixed;
  top: 15px;
  left: 15px;
  background: var(--golden-yellow);
  border: none;
  border-radius: 5px;
  padding: 10px;
  cursor: pointer;
  z-index: 300;
}

.hamburger span {
  display: block;
  width: 25px;
  height: 3px;
  background: var(--very-dark-blue);
  margin: 5px 0;
  transition: 0.3s;
}

@media (max-width: 768px) {
  .navbar {
    transform: translateX(-100%);
    width: 200px;
  }

  .navbar.active {
    transform: translateX(0);
  }

  .content-area {
    margin-left: 0;
    padding: 20px;
  }
}

html.rps footer {
  background-color: var(--golden-yellow);
  text-align: center;
  padding: 15px 20px;
  border-radius: 15px;
  font-size: 0.9rem;
  width: 60%;
  margin: 375px auto 0 auto;
  flex-shrink: 0;
  text-decoration: none;
  color: black;
  font-weight: bold;
}