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

body {
  font-family: 'Roboto', sans-serif;
  background: linear-gradient(to right, #8e2de2, #4a00e0);
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  transition: background 0.5s, color 0.5s;
  padding: 20px;
}

.quiz-container {
  background: rgba(255, 255, 255, 0.1);
  padding: 30px;
  border-radius: 15px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
  text-align: center;
  animation: floatUp 0.8s ease;
}

h1 {
  font-size: 28px;
  margin-bottom: 20px;
  color: #fff;
}

/* Input box */
#username {
  padding: 12px;
  width: 90%;
  border-radius: 10px;
  border: none;
  font-size: 16px;
  margin-bottom: 20px;
  background: #ffffffcc;
  color: #333;
  outline: none;
  transition: box-shadow 0.3s ease;
}
#username:focus {
  box-shadow: 0 0 10px #00c6ff;
}

#startBox button {
  background: #00c6ff;
  padding: 12px 25px;
  border: none;
  border-radius: 8px;
  color: white;
  font-weight: bold;
  font-size: 15px;
  cursor: pointer;
  transition: 0.3s, transform 0.2s ease;
}
#startBox button:hover {
  background: #0077ff;
  transform: scale(1.05);
}
#startBox button:active {
  transform: scale(0.98);
}

#question {
  margin-bottom: 15px;
  font-size: 20px;
}

#answers {
  margin-bottom: 20px;
}

#answers button {
  display: block;
  width: 100%;
  padding: 12px;
  margin: 8px 0;
  background: #ffffff22;
  color: #fff;
  border: 2px solid transparent;
  border-radius: 10px;
  cursor: pointer;
  font-size: 16px;
  transition: background-color 0.3s, transform 0.2s ease;
  user-select: none;
  box-shadow: inset 0 0 0 rgba(255,255,255,0);
}
#answers button:hover {
  background-color: #ffffff33;
  transform: scale(1.02);
}
#answers button:active {
  transform: scale(0.98);
}

button.correct {
  background-color: #00c851 !important;
  border-color: #00c851;
  box-shadow: 0 0 12px 3px #00e676;
  animation: glowGreen 1.5s ease infinite alternate;
}

button.wrong {
  background-color: #ff4444 !important;
  border-color: #ff4444;
  box-shadow: 0 0 12px 3px #ff1744;
  animation: glowRed 1.5s ease infinite alternate;
}

#nextBtn {
  margin-top: 10px;
  padding: 10px 25px;
  font-weight: bold;
  font-size: 15px;
  background: #00c6ff;
  border: none;
  color: white;
  border-radius: 10px;
  cursor: pointer;
  display: none;
  transition: background 0.3s, transform 0.2s ease;
}
#nextBtn:hover {
  background: #0080ff;
  transform: scale(1.05);
}
#nextBtn:active {
  transform: scale(0.98);
}

#scoreBox {
  padding: 20px;
}

#scoreBox h2 {
  font-size: 22px;
  margin-bottom: 15px;
}

#scoreBox p {
  font-size: 16px;
  margin: 10px 0;
}

#scoreBox button {
  margin-top: 15px;
  background: #ffffff22;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 10px 20px;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.3s, transform 0.2s ease;
}
#scoreBox button:hover {
  background: #ffffff33;
  transform: scale(1.05);
}
#scoreBox button:active {
  transform: scale(0.98);
}

.hidden {
  display: none;
}

/* Timer */
#timer {
  font-weight: bold;
  margin-bottom: 10px;
  font-size: 18px;
  background: #ffffff1a;
  padding: 5px 15px;
  border-radius: 20px;
  display: inline-block;
  animation: pulse 1.5s infinite ease-in-out;
}

/* Floating animation */
@keyframes floatUp {
  0% {
    transform: translateY(20px);
    opacity: 0;
  }
  100% {
    transform: translateY(0);
    opacity: 1;
  }
}

/* Glow Animations */
@keyframes glowGreen {
  from {
    box-shadow: 0 0 8px 2px #00e676;
  }
  to {
    box-shadow: 0 0 16px 4px #00c851;
  }
}

@keyframes glowRed {
  from {
    box-shadow: 0 0 8px 2px #ff1744;
  }
  to {
    box-shadow: 0 0 16px 4px #ff4444;
  }
}

/* Pulse Timer */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
    box-shadow: 0 0 10px 2px #00c6ff88;
  }
  50% {
    opacity: 0.7;
    box-shadow: 0 0 20px 5px #00c6ffbb;
  }
}

/* Theme Toggle */
.theme-toggle {
  position: absolute;
  top: 20px;
  right: 30px;
  font-size: 16px;
  z-index: 999;
  color: white;
}

.theme-toggle input {
  margin-right: 5px;
  transform: scale(1.2);
}

/* Dark Mode Styles */
body.dark {
  background: linear-gradient(to right, #141e30, #243b55);
  color: #eee;
}

body.dark .quiz-container {
  background: rgba(0, 0, 0, 0.4);
}

body.dark #username {
  background: #eee;
  color: #000;
}

body.dark #answers button {
  background: #ffffff1a;
}

body.dark #answers button:hover {
  background: #ffffff33;
}

body.dark #nextBtn {
  background: #0077ff;
}

body.dark #nextBtn:hover {
  background: #0051cc;
}

body.dark #startBox button {
  background: #0077ff;
}

body.dark #startBox button:hover {
  background: #0051cc;
}

/* Responsive */
@media (max-width: 480px) {
  .quiz-container {
    padding: 20px;
    width: 100%;
  }

  #username {
    width: 100%;
  }
}