html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    background: #181c20;
    color: #f2f2f2;
    font-family: 'Fira Mono', 'Consolas', 'Menlo', 'Monaco', monospace;
    font-size: 15px;
    line-height: 1.7;
    min-height: 100vh;
    box-sizing: border-box;
    overscroll-behavior: none;
}

#container, canvas {
    display: block;
    margin: 0 auto;
    width: 100vw;
    height: 100vh;
    background: transparent;
    position: absolute;
    top: 0; left: 0;
    z-index: 0;
}

#info {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: auto;
    max-width: 95vw;
    background: rgba(22, 22, 30, 0.85);
    color: #fff;
    padding: 18px 32px 14px 32px;
    margin: 18px auto 0 auto;
    border-radius: 12px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.35);
    text-align: center;
    font-size: 1.1em;
    user-select: none;
    pointer-events: auto;
    z-index: 10;
    transition: background 0.3s;
}

#info h2 {
    margin: 8px 0 0 0;
    font-size: 1.2em;
    font-weight: 400;
    color: #ffd700;
}

a {
    color: #ffd700;
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    text-decoration: underline;
    color: #ffb300;
}

button, input, select {
    pointer-events: auto;
}

.lil-gui {
    z-index: 20 !important;
    font-size: 15px !important;
    border-radius: 8px !important;
    background: rgba(30, 30, 40, 0.98) !important;
    color: #fff !important;
    box-shadow: 0 4px 24px rgba(0,0,0,0.25) !important;
    border: 1px solid #222 !important;
}

.lil-gui .title {
    color: #ffd700 !important;
}

.lil-gui input[type="range"]::-webkit-slider-thumb {
    background: #ffd700 !important;
}

#overlay {
    position: absolute;
    font-size: 18px;
    z-index: 30;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    background: rgba(0,0,0,0.8);
}

#overlay button {
    background: transparent;
    border: 1px solid #ffd700;
    border-radius: 4px;
    color: #ffd700;
    padding: 12px 24px;
    text-transform: uppercase;
    font-size: 1em;
    letter-spacing: 1px;
    margin-top: 16px;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}
#overlay button:hover {
    background: #ffd700;
    color: #222;
}

#notSupported {
    width: 60%;
    margin: 32px auto 0 auto;
    background-color: #c62828;
    color: #fff;
    padding: 16px 24px;
    border-radius: 6px;
    font-weight: bold;
    font-size: 1.1em;
    text-align: center;
}

@media (max-width: 900px) {
    #info {
        padding: 10px 10px 8px 10px;
        font-size: 1em;
    }
    .lil-gui {
        font-size: 13px !important;
        max-width: 90vw !important;
    }
}

@media (max-width: 640px) {
    .lil-gui.root {
        right: auto !important;
        top: auto !important;
        max-height: 50%;
        max-width: 96vw;
        bottom: 0;
        left: 0;
        font-size: 12px !important;
    }
    #info {
        max-width: 98vw;
        padding: 8px 2vw 6px 2vw;
        font-size: 0.97em;
    }
}


#loading-overlay {
  position: fixed;
  top: 0; left: 0; width: 100vw; height: 100vh;
  background: rgba(18, 18, 24, 0.97);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: opacity 0.4s;
}

.spinner {
  border: 6px solid #eee;
  border-top: 6px solid #ffd700;
  border-radius: 50%;
  width: 54px;
  height: 54px;
  animation: spin 1s linear infinite;
  margin-bottom: 18px;
}
@keyframes spin {
  0% { transform: rotate(0deg);}
  100% { transform: rotate(360deg);}
}

.loading-text {
  color: #fff;
  font-size: 1.2em;
  letter-spacing: 1px;
  text-align: center;
  font-family: 'Fira Mono', 'Consolas', 'Menlo', 'Monaco', monospace;
}
#progress-bar-container {
  width: 220px;
  height: 12px;
  background: #222;
  border-radius: 8px;
  margin: 18px 0 4px 0;
  overflow: hidden;
  box-shadow: 0 2px 8px #111a;
}
#progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #ffd700 60%, #fffbe6 100%);
  border-radius: 8px 0 0 8px;
  transition: width 0.2s;
}
#progress-percent {
  color: #ffd700;
  font-size: 1.1em;
  font-family: monospace;
  text-align: center;
  margin-bottom: 6px;
}