:root {
    --primary-color: #4A90E2;
    --primary-dark: #357ABD;
    --accent-color: #F39C12;

    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

    --dark-bg: #1a1a2e;

    --shadow-sm: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.2);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(to bottom, #f8f9fa, #e9ecef);
    min-height: 100vh;
    padding-top: 76px;
    padding-bottom: 80px;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}