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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
}

.grid-container {
    width: 400px;
    height: 400px;
    aspect-ratio: 1 / 1;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    grid-template-rows: repeat(5, 1fr);
    gap: 8px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.18);
}

.particle {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.particle.active {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    box-shadow: 0 0 20px rgba(245, 87, 108, 0.6),
                0 0 40px rgba(245, 87, 108, 0.4);
    transform: scale(1.1);
}

.controls {
    display: flex;
    flex-direction: column;
    gap: 15px;
    background: rgba(255, 255, 255, 0.1);
    padding: 20px 30px;
    border-radius: 15px;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    min-width: 400px;
}

.controls input[type="text"] {
    padding: 12px 16px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    background: rgba(255, 255, 255, 0.9);
    color: #333;
    outline: none;
    transition: all 0.3s ease;
}

.controls input[type="text"]:focus {
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.5);
    transform: scale(1.02);
}

.controls button {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    color: white;
    text-transform: uppercase;
    letter-spacing: 1px;
}

#animateBtn {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

#animateBtn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(245, 87, 108, 0.4);
}

#clearBtn {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

#clearBtn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(79, 172, 254, 0.4);
}

label {
    display: flex;
    align-items: center;
    gap: 10px;
    color: white;
    font-size: 14px;
    font-weight: 500;
}

input[type="range"] {
    flex: 1;
    height: 6px;
    border-radius: 5px;
    background: rgba(255, 255, 255, 0.3);
    outline: none;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

#speedValue {
    min-width: 60px;
    text-align: right;
    font-weight: bold;
}