/* Root variables */
:root {
  --bg-color: #0d0d0d;
  --primary-color: #00ffff;
  --primary-color-light: #66ffff;
  --text-color: #00ffff;
  --button-bg: transparent;
  --button-border: 2px solid var(--primary-color);
  --button-hover-bg: var(--primary-color);
  --button-hover-color: #000;
  --font-family: "Orbitron", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  --panel-bg: rgba(13, 13, 13, 0.85);
  --box-shadow-color: #00ffff;
  --border-radius: 12px;
}

/* Base styles */
html,
body {
  margin: 0;
  padding: 20px;
  height: 100%;
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-family);
  text-align: center;
  overflow-x: hidden;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
}

/* Panels */
#startScreen,
#difficultyScreen,
#modeTypeScreen {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--panel-bg);
  border-radius: var(--border-radius);
  padding: clamp(20px, 4vw, 40px) clamp(20px, 6vw, 60px);
  box-shadow: 0 0 25px var(--primary-color);
  min-width: clamp(250px, 40%, 500px);
  text-align: center;
  z-index: 20;
}

#startScreen h2,
#difficultyScreen h2,
#modeTypeScreen h2 {
  color: var(--primary-color-light);
  text-shadow: 0 0 8px var(--primary-color);
  margin-bottom: 1.2rem;
  font-size: clamp(1.2rem, 2.5vw, 2.2rem);
}

/* Buttons */
button,
a,
#btnWiFi,
#btnLocal {
  font-size: clamp(14px, 2vw, 18px);
  margin: 10px 15px;
  padding: clamp(8px, 1.5vw, 12px) clamp(16px, 3vw, 30px);
  border: var(--button-border);
  border-radius: var(--border-radius);
  background: var(--button-bg);
  color: var(--text-color);
  cursor: pointer;
  box-shadow: 0 0 12px var(--box-shadow-color);
  font-weight: 600;
  transition: background-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
  min-width: clamp(100px, 30%, 180px);
  display: inline-block;
  text-decoration: none;
  text-align: center;
}

button:hover,
a:hover,
#btnWiFi:hover,
#btnLocal:hover {
  background-color: var(--button-hover-bg);
  color: var(--button-hover-color);
  box-shadow: 0 0 25px var(--box-shadow-color);
}

/* Canvas */
#gameCanvas {
  background: transparent;
  box-shadow: 0 0 30px var(--primary-color);
  border-radius: var(--border-radius);
  display: block;
  margin-top: 10px;
  user-select: none;
  max-width: 95%;
  height: auto;
}

/* Round score */
#roundScoreDisplay {
  position: absolute;
  top: 15px;
  left: 50%;
  transform: translateX(-50%);
  font-size: clamp(18px, 3vw, 28px);
  font-weight: 700;
  color: var(--primary-color);
  text-shadow: 0 0 16px var(--primary-color);
  user-select: none;
  z-index: 10;
}

/* Restart button */
#restartBtn {
  display: none;
  margin: 20px auto 0 auto;
  cursor: pointer;
  user-select: none;
}

/* ESC div */
#esc {
  display: none;
  background: black;
  color: white;
  width: fit-content;
  height: fit-content;
  padding: clamp(10px, 2vw, 20px) clamp(20px, 4vw, 30px);
  position: fixed;
  top: 10px;
  font-size: clamp(14px, 2.5vw, 18px);
  opacity: 0.8;
  z-index: 9999;
}

/* Fixed buttons */
#downloadBtn,
#BF,
#iframeBtn {
  position: fixed;
  left: 0;
  width: fit-content !important;
  height: fit-content !important;
  padding: clamp(6px, 1.5vw, 12px);
  font-size: clamp(16px, 2.5vw, 22px);
  background: transparent;
  color: var(--primary-color);
  border: none;
  box-shadow: none;
  z-index: 9999;
}

#downloadBtn {
  bottom: 70px;
}
#BF {
  bottom: 15px;
}
#iframeBtn {
  bottom: 120px;
}

#downloadBtn:hover,
#BF:hover,
#iframeBtn:hover {
  color: var(--primary-color-light);
  text-shadow: 0 0 10px var(--primary-color-light);
}

/* Game controls */
#game-controls {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1000;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

#game-controls button {
  font-size: clamp(12px, 2vw, 16px);
  padding: clamp(6px, 1.5vw, 10px) clamp(8px, 2vw, 16px);
  border: var(--button-border);
  border-radius: var(--border-radius);
  background: var(--button-bg);
  color: var(--text-color);
  cursor: pointer;
  box-shadow: 0 0 12px var(--box-shadow-color);
  font-weight: 600;
  min-width: clamp(70px, 25%, 100px);
}

#game-controls button:hover {
  background-color: var(--button-hover-bg);
  color: var(--button-hover-color);
  box-shadow: 0 0 25px var(--box-shadow-color);
}

/* Responsive tweaks using media queries */
@media (max-width: 1200px) {
  #gameCanvas {
    max-width: 90%;
  }
}
@media (max-width: 992px) {
  #gameCanvas {
    max-width: 100%;
  }
}
@media (max-width: 768px) {
  #gameCanvas {
    max-width: 100%;
  }
}
@media (max-width: 480px) {
  #startScreen,
  #difficultyScreen,
  #modeTypeScreen {
    padding: 15px 10px;
    width: 100%;
  }
  h2 {
    font-size: 1.2rem;
  }
  button,
  a,
  #btnWiFi,
  #btnLocal {
    font-size: 14px;
    padding: 8px;
    min-width: 100px;
  }
}
@media (max-width: 320px) {
  #startScreen,
  #difficultyScreen,
  #modeTypeScreen {
    width: 95%;
    padding: 10px;
  }
  button,
  a,
  #btnWiFi,
  #btnLocal {
    font-size: 12px;
    padding: 6px;
  }
}
@media (max-width: 319px) {
  #startScreen,
  #difficultyScreen,
  #modeTypeScreen {
    width: 100%;
    padding: 10px;
  }
  button,
  a,
  #btnWiFi,
  #btnLocal {
    font-size: 12px;
    padding: 6px;
  }
}
@media (max-width: 150px) {
  #startScreen,
  #difficultyScreen,
  #modeTypeScreen {
    width: 100%;
    padding: 5px;
  }
  button,
  a,
  #btnWiFi,
  #btnLocal {
    font-size: 10px;
    padding: 4px;
  }
  #gameCanvas {
    min-width: 100%;
  }
}