body, html {
    height: 100%;
}
body {
    margin: 0px;
    overflow: hidden;
    background-color: black;
    position: relative;
}

canvas {
    width: 100vw;
    height: 100vh;
    display: block;
}

#control-panel {
    position: fixed;
    bottom: 20px;
    left: 20px;
    background: #d3d3d3;
    border-radius: 6px;
    padding: 0;
    min-width: 300px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    font-family: sans-serif;
    z-index: 1000;
}

.panel-header {
    background: #d3d3d3;
    color: #333;
    padding: 10px 12px;
    font-weight: normal;
    font-size: 14px;
    border-bottom: none;
    border-radius: 6px 6px 0 0;
    text-align: left;
}

.panel-content {
    padding: 8px 12px 12px 12px;
    color: #333;
    font-size: 13px;
    line-height: 1.6;
}

.control-item {
    margin-bottom: 4px;
    color: #333;
}

.control-item:last-child {
    margin-bottom: 0;
}

.key-text {
    font-family: monospace;
    color: #333;
}

#start-game-button {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 10px 20px;
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    background: rgba(70, 130, 180, 0.85);
    border: 2px solid rgba(100, 149, 237, 0.6);
    border-radius: 6px;
    cursor: pointer;
    z-index: 2000;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.4);
    transition: all 0.2s ease;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

#start-game-button:hover {
    background: rgba(100, 149, 237, 0.95);
    border-color: rgba(135, 206, 250, 0.8);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
    transform: translateY(-1px);
}

#start-game-button:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
    background: rgba(70, 130, 180, 0.9);
}

#end-game-button {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 10px 20px;
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    background: rgba(220, 20, 60, 0.85);
    border: 2px solid rgba(255, 69, 0, 0.6);
    border-radius: 6px;
    cursor: pointer;
    z-index: 2000;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.4);
    transition: all 0.2s ease;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

#end-game-button:hover {
    background: rgba(255, 69, 0, 0.95);
    border-color: rgba(255, 99, 71, 0.8);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
    transform: translateY(-1px);
}

#end-game-button:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
    background: rgba(220, 20, 60, 0.9);
}

#score-display {
    position: fixed;
    top: 10px;
    right: 365px;
    background: rgba(0, 0, 0, 0.75);
    color: #fff;
    padding: 10px 18px;
    border-radius: 6px;
    font-size: 18px;
    font-weight: bold;
    font-family: sans-serif;
    z-index: 1001;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.5);
    border: 2px solid rgba(255, 255, 255, 0.3);
    white-space: nowrap;
    display: inline-block;
}

#timer-display {
    position: fixed;
    top: 10px;
    right: 170px;
    background: rgba(0, 0, 0, 0.75);
    color: #fff;
    padding: 10px 18px;
    border-radius: 6px;
    font-size: 18px;
    font-weight: bold;
    font-family: sans-serif;
    z-index: 1001;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.5);
    border: 2px solid rgba(255, 255, 255, 0.3);
    white-space: nowrap;
    display: inline-block;
}

#targets-left-display {
    position: fixed;
    top: 10px;
    right: 20px;
    background: rgba(0, 0, 0, 0.75);
    color: #ffa500;
    padding: 10px 18px;
    border-radius: 6px;
    font-size: 18px;
    font-weight: bold;
    font-family: sans-serif;
    z-index: 1001;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.5);
    border: 2px solid rgba(255, 165, 0, 0.5);
    white-space: nowrap;
    display: inline-block;
}

#best-time-display {
    position: fixed;
    top: 60px;
    right: 20px;
    background: rgba(0, 0, 0, 0.75);
    color: #90ee90;
    padding: 10px 18px;
    border-radius: 6px;
    font-size: 18px;
    font-weight: bold;
    font-family: sans-serif;
    z-index: 1001;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
    border: 2px solid rgba(144, 238, 144, 0.5);
    white-space: nowrap;
    height: fit-content;
    line-height: 1.4;
}