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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 25px;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: #2c3e50;
}

.input-section {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

input[type="number"] {
    padding: 10px;
    font-size: 16px;
    border: 1px solid #ddd;
    border-radius: 4px;
    width: 180px;
}

button {
    padding: 10px 20px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #2980b9;
}

.presets {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.presets span {
    font-weight: bold;
    color: #555;
}

.preset-btn {
    padding: 8px 12px;
    background-color: #34495e;
    font-size: 14px;
}

.preset-btn:hover {
    background-color: #2c3e50;
}

.info-panel {
    display: flex;
    justify-content: space-around;
    background-color: #fff;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

.info-panel div {
    font-size: 18px;
    font-weight: bold;
    color: #2c3e50;
}

#visualization-container {
    width: 100%;
    height: 650px;
    background-color: #eee;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    position: relative;
    margin-bottom: 10px;
}

.stadium-label {
    text-shadow: 0px 0px 4px rgba(0, 0, 0, 0.7);
    pointer-events: none;
    z-index: 10;
}

.legend {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
    margin-bottom: 15px;
    background-color: white;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 5px;
    font-size: 16px;
}

.crowd-icon {
    width: 30px;
    height: 30px;
    border-radius: 4px;
    background-size: cover;
    background-position: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    background-color: #e74c3c;
}

.legend-icon {
    display: inline-block;
    margin-right: 8px;
}

.controls-help {
    margin-top: 15px;
    text-align: center;
    font-size: 14px;
    color: #7f8c8d;
    background-color: #f9f9f9;
    padding: 10px;
    border-radius: 8px;
}

.performance-note {
    font-style: italic;
    color: #e74c3c;
    margin-top: 8px;
    font-size: 13px;
}

.about-section {
    margin-top: 30px;
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.about-section h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    text-align: center;
}

.about-section p {
    margin-bottom: 10px;
    font-size: 15px;
    text-align: justify;
}

#rendering-warning {
    width: 100%;
    text-align: center;
    margin-top: 10px;
    padding: 5px;
    background-color: rgba(231, 76, 60, 0.1);
    border-radius: 4px;
}

.performance-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: 15px;
}

.performance-toggle label {
    font-size: 14px;
    color: #555;
    font-weight: bold;
}

/* Toggle switch */
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
}

input:checked + .slider {
    background-color: #2ecc71;
}

input:focus + .slider {
    box-shadow: 0 0 1px #2ecc71;
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.slider.round {
    border-radius: 24px;
}

.slider.round:before {
    border-radius: 50%;
}

/* Media queries for responsiveness */
@media (max-width: 768px) {
    .input-section {
        flex-direction: column;
        align-items: stretch;
    }
    
    input[type="number"] {
        width: 100%;
    }
    
    .info-panel {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }
    
    #visualization-container {
        height: 400px;
    }
    
    .presets {
        flex-direction: column;
        gap: 8px;
    }
    
    .preset-btn {
        width: 100%;
    }
}

.control-btn {
    padding: 8px 15px;
    background-color: #27ae60;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    margin: 10px 0;
    transition: background-color 0.3s;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.control-btn:hover {
    background-color: #2ecc71;
}

#reset-view-btn {
    display: block;
    margin: -5px auto 15px auto;
}

/* Keyboard controls display */
.keyboard-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 0 auto 20px;
    max-width: 180px;
    background-color: rgba(0, 0, 0, 0.05);
    border-radius: 8px;
    padding: 10px;
}

.key-row {
    display: flex;
    justify-content: center;
    margin-bottom: 5px;
}

.key {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background-color: #34495e;
    color: white;
    border-radius: 4px;
    margin: 0 3px;
    font-weight: bold;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    border: 1px solid #2c3e50;
}

.key-info {
    font-size: 12px;
    color: #555;
    margin-top: 5px;
    text-align: center;
}