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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

header {
    margin-bottom: 30px;
    color: white;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo {
    height: 60px;
    width: auto;
    filter: drop-shadow(2px 2px 4px rgba(0,0,0,0.3));
}

.brand-name {
    font-size: 2.5rem;
    font-weight: bold;
    color: #4080FF;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    background: linear-gradient(135deg, #4080FF 0%, #6fa8ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-section {
    text-align: center;
}

.title-section h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.title-section p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.controls {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    margin-bottom: 30px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    align-items: end;
}

.input-group {
    display: flex;
    flex-direction: column;
}

.input-group label {
    font-weight: 600;
    margin-bottom: 8px;
    color: #555;
}

.input-group input,
.input-group select {
    padding: 8px;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 0.9rem;
    width: 100px;
    transition: border-color 0.3s ease;
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: #667eea;
}

.button-group {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
    transform: translateY(-2px);
}

.btn-success {
    background: #28a745;
    color: white;
}

.btn-success:hover {
    background: #218838;
    transform: translateY(-2px);
}

.charts-container {
    margin-bottom: 30px;
}

.three-chart-section {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.chart-column {
    background: white;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.chart-section {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.chart-section h3 {
    margin-bottom: 20px;
    color: #333;
    text-align: center;
    font-size: 1.3rem;
}

.canvas-container {
    margin: 20px 0;
    text-align: center;
}

.canvas-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding: 0 10px;
}

.canvas-header h3 {
    margin: 0;
    color: #333;
}

.drawing-controls {
    display: flex;
    gap: 10px;
}

.drawing-controls .btn {
    padding: 8px 16px;
    font-size: 14px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-secondary {
    background-color: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background-color: #5a6268;
}

.btn-danger {
    background-color: #dc3545;
    color: white;
}

.btn-danger:hover {
    background-color: #c82333;
}

.btn-primary {
    background-color: #007bff;
    color: white;
}

.btn-primary:hover {
    background-color: #0056b3;
}

.btn-outline-primary {
    background-color: transparent;
    color: #007bff;
    border: 2px solid #007bff;
}

.btn-outline-primary:hover {
    background-color: #007bff;
    color: white;
}

.btn-outline-secondary {
    background-color: transparent;
    color: #6c757d;
    border: 2px solid #6c757d;
}

.btn-outline-secondary:hover {
    background-color: #6c757d;
    color: white;
}

.coordinates {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: #666;
}

.zoom-hint {
    color: #007bff !important;
    font-size: 0.8rem !important;
    font-style: italic;
    opacity: 0.8;
}

.data-display {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.data-display h3 {
    margin-bottom: 20px;
    color: #333;
    text-align: center;
}

.tabs {
    display: flex;
    border-bottom: 2px solid #e1e5e9;
    margin-bottom: 20px;
}

.tab-btn {
    padding: 12px 24px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: #666;
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
}

.tab-btn.active {
    color: #667eea;
    border-bottom-color: #667eea;
}

.tab-btn:hover {
    color: #333;
}

.tab-content {
    min-height: 300px;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}

th, td {
    padding: 12px;
    text-align: center;
    border-bottom: 1px solid #e1e5e9;
}

th {
    background: #f8f9fa;
    font-weight: 600;
    color: #333;
}

tr:hover {
    background: #f8f9fa;
}

canvas {
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    cursor: crosshair;
    background: #f8f9fa;
    touch-action: none; /* Prevent default touch behaviors */
}

@media (max-width: 1200px) {
    .three-chart-section {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .chart-column canvas {
        width: 100%;
        max-width: 400px;
    }
}

@media (max-width: 768px) {
    .controls {
        grid-template-columns: 1fr;
    }
    
    .button-group {
        justify-content: center;
    }
    
    .header-content {
        flex-direction: column;
        gap: 20px;
    }
    
    .logo {
        height: 50px;
        width: auto;
    }
    
    .brand-name {
        font-size: 2rem;
    }
    
    .title-section h1 {
        font-size: 2rem;
    }
    
    canvas {
        width: 100%;
        height: auto;
    }
}