* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

:root {
    --primary: #2c3e50;
    --secondary: #3498db;
    --accent: #e74c3c;
    --success: #27ae60;
    --light: #ecf0f1;
    --dark: #34495e;
    --shadow: 0 4px 6px rgba(0,0,0,0.1);
}

body {
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.6;
}

/* Общие классы */
.btn {
    padding: 0.6rem 1.2rem;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 500;
    border: none;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--secondary);
    color: var(--secondary);
}

.btn-primary {
    background: var(--secondary);
    color: white;
}

.btn-accent {
    background: var(--accent);
    color: white;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2.2rem;
    color: var(--primary);
    position: relative;
}

.section-title:after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--secondary);
    margin: 0.5rem auto;
    border-radius: 2px;
}

.operation-header {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    border-left: 5px solid var(--secondary);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.operation-header .filter-title-avito {
    margin-bottom: 0;
}

.no-results {
    grid-column: 1 / -1;
    background: white;
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    box-shadow: var(--shadow);
    margin-top: 20px;
}