:root {
  --bg-dark: #0d0e15;
  --panel-bg: #161724;
  --panel-border: rgba(255, 255, 255, 0.1);
  --accent-cyan: #00f0ff;
  --accent-green: #00ff88;
  --accent-pink: #ff007f;
  --accent-purple: #9d4edd;
  --accent-yellow: #ffb703;
  --text-main: #f8f9fa;
  --text-sub: #a0a0b8;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
}

body {
  font-family: 'Kanit', 'Outfit', sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 10px;
  overflow: hidden;
}

/* Header Navigation Bar */
.app-header {
  width: 1000px;
  max-width: 98vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  gap: 12px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-tag {
  background: linear-gradient(135deg, #00f0ff, #7000ff);
  color: #0f0f17;
  font-weight: 800;
  font-size: 14px;
  padding: 6px 14px;
  border-radius: 12px;
  letter-spacing: 0.5px;
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
}

/* Status Badge */
.status-badge {
  background: rgba(30, 30, 46, 0.9);
  backdrop-filter: blur(10px);
  padding: 7px 15px;
  border-radius: 20px;
  border: 1px solid rgba(0, 240, 255, 0.25);
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-sub);
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-yellow);
  box-shadow: 0 0 10px var(--accent-yellow);
  transition: background 0.3s;
  flex-shrink: 0;
}

.status-dot.active {
  background: var(--accent-green);
  box-shadow: 0 0 10px var(--accent-green);
}

/* UI Controls & Round Selector */
.ui-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.round-selector {
  display: flex;
  align-items: center;
  gap: 4px;
  background: rgba(30, 30, 46, 0.9);
  padding: 3px 8px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.round-label {
  font-size: 12px;
  color: var(--text-sub);
  margin-right: 4px;
}

.pill-btn {
  background: transparent;
  border: none;
  color: var(--text-sub);
  font-family: 'Kanit', sans-serif;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s;
}

.pill-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.08);
}

.pill-btn.active {
  background: linear-gradient(135deg, var(--accent-cyan), #0077b6);
  color: #0f0f17;
  font-weight: 700;
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.4);
}

.btn {
  background: linear-gradient(135deg, #2a2a40, #181825);
  color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 7px 14px;
  border-radius: 12px;
  font-family: 'Kanit', sans-serif;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn:hover {
  background: linear-gradient(135deg, #00f0ff, #7000ff);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 16px rgba(0, 240, 255, 0.4);
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn-shuffle {
  background: linear-gradient(135deg, #7000ff, #ff007f);
  border-color: rgba(255, 0, 127, 0.4);
}

.btn-shuffle:hover {
  background: linear-gradient(135deg, #ff007f, #ffb703);
  box-shadow: 0 0 18px rgba(255, 0, 127, 0.5);
}

/* Main Canvas Container */
.game-container {
  position: relative;
  width: 1000px;
  height: 650px;
  background: var(--panel-bg);
  border-radius: 20px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 35px rgba(0, 240, 255, 0.15);
  border: 1px solid var(--panel-border);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

#webcam {
  display: none;
}

#quizCanvas {
  width: 100%;
  height: 100%;
  display: block;
}