/* ---------- Base Reset ---------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', sans-serif;
}

/* ---------- Body Styles ---------- */
body {
  min-height: 100vh;
  background: linear-gradient(135deg, #FF00FF, #00FFFF);
  color: #111;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  transition: background 0.4s ease, color 0.4s ease;
}
body.dark {
  background: linear-gradient(135deg, #121212, #2c2c2c);
  color: #f5f5f5;
}

/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: 700px;
  text-align: center;
}

/* ---------- Header ---------- */
h1 {
  font-size: 3rem;
  margin: 1rem 0;
  animation: fadeIn 1s ease-in;
}
#status {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  font-weight: 500;
}

/* ---------- Controls ---------- */
.controls {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
}

button {
  padding: 0.6rem 1.2rem;
  font-size: 1rem;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.3s ease;
}
#mode-toggle {
  background: #333;
  color: white;
}
#mode-toggle:hover {
  background: #555;
}
body.dark #mode-toggle {
  background: #ddd;
  color: #111;
}
#audio-toggle {
  background: #007BFF;
  color: white;
}
#audio-toggle:hover {
  background: #0056b3;
}

/* ---------- Scoreboard ---------- */
.scoreboard {
  display: flex;
  justify-content: space-around;
  margin: 1rem 0;
}
#scoreBox, #highScoreBox {
  font-weight: bold;
  font-size: 1.1rem;
}
body.dark #highScoreBox,
body.dark #scoreBox {
  color: #fff;
}

/* ---------- Button Grid ---------- */
.btn-Container {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 2rem auto;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(5px);
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}
.first-line, .second-line {
  display: flex;
  justify-content: center;
  gap: 1rem;
}
.btn {
  width: 120px;
  height: 120px;
  border-radius: 15px;
  border: 5px solid black;
  font-weight: bold;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
}
.btn:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

/* ---------- Button Colors ---------- */
.red    { background-color: #FF6B6B; }
.yellow { background-color: #FFF176; }
.green  { background-color: #81C784; }
.purple { background-color: #BA68C8; }

/* ---------- Button Flash Effects ---------- */
.flash {
  transform: scale(1.15);
  box-shadow: 0 0 20px rgba(0, 255, 0, 0.7);
}
.userflash {
  opacity: 0.6;
  filter: brightness(120%);
}

/* ---------- Game Buttons ---------- */
.game-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 1.5rem;
}
#startBtn {
  background-color: #28a745;
  color: white;
}
#startBtn:hover {
  background-color: #218838;
}
#restartBtn {
  background-color: #dc3545;
  color: white;
}
#restartBtn:hover {
  background-color: #c82333;
}

/* ---------- Win Message ---------- */
#winMessage {
  margin-top: 1.5rem;
  font-size: 1.3rem;
  color: #28a745;
  animation: pulse 1.2s infinite;
}
@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}
.hidden {
  display: none;
}

/* ---------- Modal ---------- */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}
.modal-content {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  max-width: 500px;
  text-align: center;
}
.modal-content h2 {
  margin-bottom: 1rem;
}
.modal-content p {
  margin-bottom: 1rem;
  font-size: 1rem;
}
#closeModal {
  padding: 0.5rem 1.2rem;
  background-color: #007BFF;
  color: white;
}
#closeModal:hover {
  background-color: #0056b3;
}

/* ---------- Footer ---------- */
footer {
  margin-top: 3rem;
  font-size: 0.9rem;
  color: #555;
}
footer a {
  color: #007BFF;
  text-decoration: none;
}
footer a:hover {
  text-decoration: underline;
}

/* ---------- Animations ---------- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- Responsive Design ---------- */
@media (max-width: 600px) {
  .btn {
    width: 80px;
    height: 80px;
    font-size: 1rem;
  }
  .btn-Container {
    width: 90%;
  }
  h1 {
    font-size: 2rem;
  }
  .scoreboard {
    flex-direction: column;
    gap: 0.5rem;
  }
}