body, html {
  margin: 0; padding: 0; overflow: hidden;
  background-color: #181818;
  background-color: #171717;
  opacity: 1;
  background-image: radial-gradient(#414141 0.8500000000000001px, #181818 0.8500000000000001px);
  background-size: 17px 17px;}
#title-display {
  position: fixed; top: 10px; left: 10px;
  font-size: 24px;
}
#message-display {
  position: fixed; top: 40px; left: 10px;
  font-size: 16px;
}
#client-index {
  position: fixed; top: 70px; left: 10px;
  font-size: 16px;
}
canvas {
  display: block;
  z-index: 5;
}

#background-text {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-weight: 900;
  font-size: clamp(24px, 6vw, 100px); /* <– kleinerer vw-Wert = früher skalieren */
  color: #252424;
  opacity: 0.6;
  pointer-events: none;
  user-select: none;
  z-index: 0;
  font-family: 'Helvetica Neue', sans-serif;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
}

video {
  position: fixed;
  width: 1px;
  height: 1px;
  top: 0;
  left: 0;
  opacity: 0;
}


.tutorial-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1c1c1e 0%, #3d3d40 100%);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease;
    color-scheme: dark;
}

.tutorial-container {
    max-width: 600px;
    width: 90%;
    background: rgba(28, 28, 30, 0.85);
    backdrop-filter: blur(30px);
    border-radius: 24px;
    padding: 48px;
    text-align: center;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

@media (max-width: 600px) {
    .tutorial-container {
        padding: 32px 24px;
        border-radius: 20px;
        margin: 20px;
    }
}

.tutorial-title {
    font-size: 32px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 16px;
    font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}

@media (max-width: 600px) {
    .tutorial-title {
        font-size: 28px;
    }
}

.tutorial-image {
    width: 280px;
    height: 200px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    margin: 32px auto;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: #aaa;
    font-weight: 500;
    border: 2px dashed rgba(255, 255, 255, 0.15);
}

@media (max-width: 600px) {
    .tutorial-image {
        width: 240px;
        height: 170px;
        margin: 24px auto;
        font-size: 16px;
    }
}

.tutorial-description {
    font-size: 18px;
    line-height: 1.6;
    color: #d1d1d6;
    margin-bottom: 40px;
    font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}

@media (max-width: 600px) {
    .tutorial-description {
        font-size: 16px;
        margin-bottom: 32px;
    }
}

.tutorial-buttons {
    display: flex;
    gap: 32px; 
    justify-content: center;
    align-items: center;
}

.tutorial-btn {
    padding: 14px 28px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
    min-width: 120px;
    backdrop-filter: blur(20px);
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
}

@media (max-width: 600px) {
    .tutorial-btn {
        padding: 12px 24px;
        font-size: 15px;
        width: 100%;
        max-width: 200px;
    }
}

.tutorial-btn-primary {
    background: rgba(10, 132, 255, 0.2);
    border: 1px solid rgba(10, 132, 255, 0.35);
    color: #0a84ff;
}

.tutorial-btn-primary:hover {
    background: rgba(10, 132, 255, 0.3);
    transform: translateY(-1px);
    border-color: rgba(10, 132, 255, 0.5);
}

.tutorial-btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #d1d1d6;
}

.tutorial-btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
    border-color: rgba(255, 255, 255, 0.25);
}


.tutorial-progress {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 32px;
}

.progress-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.progress-dot.active {
    background: #0a84ff;
    transform: scale(1.2);
}

.hidden {
    display: none !important;
}