:root {
    --primary-color: #007aff;
    --background-gradient: linear-gradient(135deg, #1e1e1e, #3a3a3a);
    --text-color: #ffffff;
    --ui-background: rgba(0, 0, 0, 0.7);
    --shadow-color: rgba(0, 0, 0, 0.3);
}

body { 
    margin: 0; 
    overflow: hidden;
    background: var(--background-gradient);
    color: var(--text-color);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

#loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--background-gradient);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    z-index: 1000;
}

#ui {
    position: fixed;
    top: 20px;
    left: 20px;
    right: 20px;
    z-index: 200;
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
}

.control {
    background: var(--ui-background);
    padding: 16px;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--shadow-color);
    width: 100%;
    max-width: 300px;
    color: rgba(255,255,255,0.6);
    font-size: 25px;
}

.slider {
    --slider-width: 10rem;
    --slider-height: 10px;
    --slider-bg: rgb(82, 82, 82);
    --slider-border-radius: 999px;
    --level-color: #93ad88;
    --level-transition-duration: .1s;
    --icon-margin: 15px;
    --icon-color: var(--slider-bg);
    --icon-size: 25px;
  }
  
  .slider {
    font-family: "Arial";
    cursor: pointer;
    display: -webkit-inline-box;
    display: -ms-inline-flexbox;
    display: inline-flex;
    -webkit-box-orient: horizontal;
    -webkit-box-direction: reverse;
    -ms-flex-direction: row-reverse;
    flex-direction: row-reverse;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
  }
  
  .slider .volume {
    display: inline-block;
    vertical-align: top;
    margin-right: var(--icon-margin);
    color: var(--icon-color);
    width: var(--icon-size);
    height: auto;
  }

  .slider .value {
    padding-right: 10px;
  }
  
  .slider .level {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    width: var(--slider-width);
    height: var(--slider-height);
    background: var(--slider-bg);
    overflow: hidden;
    border-radius: var(--slider-border-radius);
    -webkit-transition: height var(--level-transition-duration);
    -o-transition: height var(--level-transition-duration);
    transition: height var(--level-transition-duration);
    cursor: pointer;
    touch-action: none;
  }
  
  .slider .level::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--level-color);
    border-radius: 50%;
    cursor: pointer;
    -webkit-box-shadow: -200px 0 0 190px var(--level-color);
    box-shadow: -200px 0 0 190px var(--level-color);
  }
  
  .slider .level::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--level-color);
    border-radius: 50%;
    cursor: pointer;
    border: none;
  }
  
  .slider:hover .level {
    height: calc(var(--slider-height) * 2);
  }

.button {
    margin: 0;
    height: auto;
    background: transparent;
    padding-right: 0.5rem;
    border: none;
    cursor: pointer;
  }

.button {
    --border-right: 6px;
    --text-stroke-color: rgba(255,255,255,0.6);
    --animation-color: #93ad88;
    --fs-size: 2em;
    letter-spacing: 3px;
    text-decoration: none;
    font-size: var(--fs-size);
    font-family: "Arial";
    position: relative;
    text-transform: uppercase;
    color: transparent;
    -webkit-text-stroke: 1px var(--text-stroke-color);
  }
  
  .hover-text {
    position: absolute;
    box-sizing: border-box;
    content: attr(data-text);
    color: var(--animation-color);
    width: 0%;
    inset: 0;
    border-right: var(--border-right) solid var(--animation-color);
    overflow: hidden;
    transition: 0.5s;
    -webkit-text-stroke: 1px var(--animation-color);
  }
  
  .button:hover .hover-text {
    width: 100%;
    filter: drop-shadow(0 0 23px var(--animation-color))
  }
  

input[type="range"] {
    width: 100%;
    margin: 8px 0;
}

.info-panel {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--ui-background);
    padding: 24px 16px;
    border-radius: 20px 20px 0 0;
    max-height: 60vh;
    overflow-y: auto;
    z-index: 201;
    box-shadow: 0 -4px 12px var(--shadow-color);
}

.info-content {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.avatar-container {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    overflow: hidden;
    background: #93ad88;
    box-shadow: 0 2px 4px var(--shadow-color);
}

.robot-avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.close-btn {
    position: absolute;
    top: 16px;
    right: 16px;
    background: #93ad88;
    border: none;
    color: var(--text-color);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    font-size: 24px;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 2px 4px var(--shadow-color);
    transition: transform 0.2s ease;
}

.close-btn:active {
    transform: scale(0.95);
}

#solarSystemCanvas {
    display: block;
    width: 100%;
    height: 100vh;
}

/* Larger Screens */
@media (min-width: 768px) {
    #ui {
        flex-wrap: nowrap;
        justify-content: flex-start;
    }
    
    .control {
        min-width: 200px;
    }
    
    .info-panel {
        bottom: 20px;
        left: 20px;
        right: auto;
        width: 360px;
        border-radius: 12px;
        max-height: 40vh;
    }

    .avatar-container {
        width: 64px;
        height: 64px;
    }

    .close-btn {
        width: 32px;
        height: 32px;
        font-size: 18px;
        top: 12px;
        right: 12px;
    }
}

@media (hover: none) and (pointer: coarse) {
    .button {
        color: var(--text-stroke-color);
        -webkit-text-stroke: 0;
    }

    .button .hover-text {
        display: none;
    }

    .button:active {
        color: var(--animation-color);
        transform: scale(0.95);
        transition: transform 0.2s ease;
    }
}