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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #0a0a0a;
    color: #e0e0e0;
    overflow: hidden;
    width: 100vw;
    height: 100vh;
}

/* Canvas */
#particleCanvas {
    display: block;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, #1a1a2e 0%, #0a0a0a 100%);
    cursor: crosshair;
}

/* Loading Screen */
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #0a0a0a;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    transition: opacity 0.5s ease-out;
}

#loading-screen.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-content {
    text-align: center;
}

.loading-content h1 {
    color: #00d9ff;
    margin-bottom: 30px;
    font-size: 2rem;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    margin: 0 auto 20px;
    border: 4px solid rgba(0, 217, 255, 0.1);
    border-top-color: #00d9ff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-content p {
    color: #888;
    font-size: 0.9rem;
}

/* Control Panel */
#control-panel {
    position: fixed;
    top: 20px;
    right: 20px;
    background: rgba(20, 20, 30, 0.9);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid rgba(0, 217, 255, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    min-width: 280px;
    backdrop-filter: blur(10px);
}

#control-panel h2 {
    color: #00d9ff;
    margin-bottom: 20px;
    font-size: 1.3rem;
    text-align: center;
    border-bottom: 2px solid rgba(0, 217, 255, 0.3);
    padding-bottom: 10px;
}

.control-group {
    margin-bottom: 20px;
}

.control-group label {
    display: block;
    margin-bottom: 8px;
    color: #b0b0b0;
    font-size: 0.9rem;
}

.control-group label span {
    color: #00d9ff;
    font-weight: bold;
    float: right;
}

input[type="range"] {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
    outline: none;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: #00d9ff;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(0, 217, 255, 0.5);
    transition: all 0.2s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    background: #00ffff;
    box-shadow: 0 0 15px rgba(0, 217, 255, 0.8);
    transform: scale(1.1);
}

input[type="checkbox"] {
    margin-right: 8px;
    cursor: pointer;
}

.button-group {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

button {
    flex: 1;
    padding: 10px;
    background: rgba(0, 217, 255, 0.2);
    border: 1px solid #00d9ff;
    color: #00d9ff;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s;
}

button:hover {
    background: rgba(0, 217, 255, 0.3);
    box-shadow: 0 0 15px rgba(0, 217, 255, 0.3);
    transform: translateY(-2px);
}

button:active {
    transform: translateY(0);
}

/* Stats */
.stats {
    background: rgba(0, 0, 0, 0.3);
    padding: 15px;
    border-radius: 8px;
    border: 1px solid rgba(0, 217, 255, 0.2);
}

.stat-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

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

.stat-label {
    color: #888;
}

.stat-item span:last-child {
    color: #00d9ff;
    font-weight: bold;
    font-family: 'Courier New', monospace;
}

/* Instructions */
#instructions {
    position: fixed;
    bottom: 20px;
    left: 20px;
    background: rgba(20, 20, 30, 0.95);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid rgba(0, 217, 255, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    max-width: 350px;
    backdrop-filter: blur(10px);
    animation: slideIn 0.5s ease-out;
}

@keyframes slideIn {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

#instructions.hidden {
    display: none;
}

#instructions h3 {
    color: #00d9ff;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

#instructions ul {
    list-style: none;
    margin-bottom: 15px;
}

#instructions li {
    padding: 6px 0;
    color: #b0b0b0;
    font-size: 0.9rem;
}

#instructions li:before {
    content: "→ ";
    color: #00d9ff;
    margin-right: 8px;
}

#close-instructions {
    width: 100%;
}

/* Info Badge */
#info-badge {
    position: fixed;
    top: 20px;
    left: 20px;
    background: rgba(20, 20, 30, 0.9);
    padding: 15px 20px;
    border-radius: 10px;
    border: 1px solid rgba(0, 217, 255, 0.3);
    backdrop-filter: blur(10px);
}

.badge-title {
    color: #00d9ff;
    font-weight: bold;
    font-size: 1rem;
    margin-bottom: 4px;
}

.badge-subtitle {
    color: #888;
    font-size: 0.8rem;
}

/* Responsive */
@media (max-width: 768px) {
    #control-panel {
        top: auto;
        bottom: 20px;
        right: 20px;
        left: 20px;
        min-width: auto;
    }

    #instructions {
        bottom: auto;
        top: 80px;
    }

    #info-badge {
        font-size: 0.85rem;
        padding: 10px 15px;
    }
}