body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 20px;
    background-color: #f0f2f5;
}
.container {
    max-width: 1400px;
    margin: 0 auto;
    background: white;
    padding: 20px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}
.header {
    text-align: center;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #4a86e8;
}
.header h1 {
    margin: 0;
    color: #2c3e66;
}
.header p {
    margin: 5px 0 0;
    color: #4a627a;
}
.tabs {
    display: flex;
    margin-bottom: 20px;
    border-bottom: 1px solid #ddd;
    flex-wrap: wrap;
}
.tab {
    padding: 10px 24px;
    cursor: pointer;
    background: #f0f0f0;
    border: 1px solid #ddd;
    border-bottom: none;
    border-radius: 12px 12px 0 0;
    margin-right: 6px;
    font-weight: 600;
    transition: 0.2s;
}
.tab.active {
    background: #4a86e8;
    color: white;
    border-color: #4a86e8;
}
.tab-content {
    display: none;
    animation: fadeIn 0.2s ease;
}
.tab-content.active {
    display: block;
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
.controls {
    margin: 15px 0 5px;
    padding: 15px 20px;
    background: #f8f9fc;
    border-radius: 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: center;
    border: 1px solid #e9ecef;
}
.control-group {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: white;
    padding: 5px 12px;
    border-radius: 40px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
label {
    font-weight: 600;
    color: #2c3e66;
}
input, select {
    padding: 6px 10px;
    border-radius: 20px;
    border: 1px solid #ccc;
    background: white;
    cursor: pointer;
}
input[type="range"] {
    width: 160px;
}
.value-display {
    min-width: 40px;
    text-align: center;
    background: #eef2fa;
    padding: 2px 8px;
    border-radius: 20px;
    font-family: monospace;
}
textarea {
    width: 100%;
    font-family: monospace;
    border-radius: 12px;
    border: 1px solid #ccc;
    padding: 12px;
    font-size: 13px;
}
button {
    background: #4a86e8;
    color: white;
    border: none;
    padding: 8px 20px;
    border-radius: 30px;
    cursor: pointer;
    font-weight: bold;
    margin-top: 10px;
    transition: 0.2s;
}
button:hover {
    background: #2c5fc7;
}
.info-note {
    background: #e9f0fe;
    border-left: 4px solid #4a86e8;
    padding: 8px 15px;
    border-radius: 10px;
    font-size: 13px;
    margin-top: 12px;
}
.file-upload-area {
    background: #f1f3f7;
    border-radius: 12px;
    padding: 12px;
    margin: 10px 0;
    display: flex;
    gap: 15px;
    align-items: center;
    flex-wrap: wrap;
}
.csv-status {
    font-size: 12px;
    color: #2c5fc7;
    background: white;
    padding: 4px 12px;
    border-radius: 20px;
}
hr {
    margin: 15px 0;
    border-color: #e0e4ec;
}
.comparison-container {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}
.comparison-item {
    flex: 1;
    min-width: 350px;
    background: #fefefe;
    border-radius: 12px;
    padding: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.comparison-item h3 {
    text-align: center;
    margin-top: 0;
    color: #2c3e66;
}
.comparison-controls {
    display: flex;
    gap: 12px;
    margin-top: 12px;
    align-items: center;
    justify-content: center;
}
.insight-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 20px;
}
.insight-card {
    background: #f8f9fc;
    border-radius: 16px;
    padding: 16px;
    flex: 1;
    min-width: 200px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}
.insight-card h4 {
    margin: 0 0 10px 0;
    color: #2c3e66;
    border-left: 4px solid #4a86e8;
    padding-left: 12px;
}
.stat-value {
    font-size: 24px;
    font-weight: bold;
    color: #1e466e;
}
.stat-label {
    font-size: 13px;
    color: #6c757d;
}
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
}
th, td {
    border: 1px solid #ddd;
    padding: 6px;
    text-align: center;
}
th {
    background: #e9ecef;
}