body {
    /*background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);*/
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.main-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    margin: 2rem auto;
    padding: 2rem;
}

.header-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem;
    border-radius: 15px;
    margin-bottom: 2rem;
    text-align: center;
}

.control-panel {
    background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
    border-radius: 15px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.chart-container {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

.axis text {
    font-size: 12px;
    fill: #666;
}

.axis path,
.axis line {
    fill: none;
    stroke: #ddd;
    stroke-width: 1;
}

.grid line {
    stroke: #e0e0e0;
    stroke-width: 1;
    stroke-dasharray: 3, 3;
}

.grid path {
    stroke-width: 0;
}

.peak-line {
    stroke: #667eea;
    stroke-width: 2;
    fill: none;
}

.peak-circle {
    fill: #ff6b6b;
    stroke: #fff;
    stroke-width: 2;
    cursor: pointer;
    transition: all 0.3s ease;
}

.peak-circle:hover {
    fill: #ff5252;
    r: 6;
}

.tooltip {
    position: absolute;
    background: rgba(0, 0, 0, 0.9);
    color: white;
    padding: 10px;
    border-radius: 8px;
    font-size: 12px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 1000;
}

.stats-card {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    border-radius: 15px;
    padding: 1.5rem;
    text-align: center;
    color: #333;
    margin-bottom: 1rem;
}

.icon-large {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: #667eea;
}

.form-range::-webkit-slider-thumb {
    background: #667eea;
}

.form-range::-moz-range-thumb {
    background: #667eea;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 10px;
    padding: 0.5rem 1.5rem;
}

.btn-info {
    background: linear-gradient(135deg, #17a2b8 0%, #138496 100%);
    border: none;
    border-radius: 10px;
    padding: 0.5rem 1.5rem;
    color: white;
}

.btn-info:hover {
    background: linear-gradient(135deg, #138496 0%, #17a2b8 100%);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn-success {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    border: none;
    border-radius: 10px;
    padding: 0.5rem 1.5rem;
}

.btn-success:hover {
    background: linear-gradient(135deg, #20c997 0%, #28a745 100%);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.upload-info {
    background: linear-gradient(135deg, #e3f2fd 0%, #f3e5f5 100%);
    border-radius: 10px;
    padding: 1rem;
    margin-top: 1rem;
    border-left: 4px solid #2196f3;
}

.file-info {
    background: linear-gradient(135deg, #e8f5e8 0%, #f0f8ff 100%);
    border-radius: 10px;
    padding: 1rem;
    margin: 1rem 0;
    border-left: 4px solid #4caf50;
}