* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: #1a1a2e;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

#game-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

#game-canvas {
    border: 2px solid #444;
    background-color: #000;
    /* ビューポートに合わせてスケーリング（アスペクト比維持） */
    width: min(100vw - 4px, calc((95vh - 4px) * 1.6));
    height: min(95vh - 4px, calc((100vw - 4px) / 1.6));
}

#log-toolbar {
    display: none;
    max-width: 100%;
    justify-content: flex-end;
    align-items: center;
    padding: 6px 4px;
    gap: 10px;
}

#copy-log-btn {
    background-color: #1A1A2E;
    color: #666688;
    border: 1px solid #333355;
    padding: 4px 14px;
    font-size: 12px;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s ease;
}

#copy-log-btn:hover {
    color: #CCCCDD;
    border-color: #00E5FF;
    background-color: #0A0A28;
}

#copy-feedback {
    color: #00FF88;
    font-size: 12px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

#copy-feedback.show {
    opacity: 1;
}