* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}

:root {
    --custom-bg-image: url('');
    --accent-glow: #60a5fa;
    --glass-bg: rgba(15, 23, 42, 0.75);
    --glass-border: rgba(255, 255, 255, 0.12);
    --bg-blur: 4px;
    --bg-darken: 0.4; 
    --mouse-x: 50;
    --mouse-y: 50;
}

body {
    background-color: #0f172a;  /* fallback */
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    color: #fff;
    overflow: hidden;
    min-height: 100vh;
    position: relative;
}

/* bg image with blur */
body::before {
    content: '';
    position: fixed;
    top: -10%;
    left: -10%;
    width: 120%;
    height: 120%;
    background-image: var(--custom-bg-image);
    background-size: 120% 120%;
    background-position: 
        calc(50% + (var(--mouse-x) - 50) * 0.2%)
        calc(50% + (var(--mouse-y) - 50) * 0.2%);
    background-repeat: no-repeat;
    filter: blur(var(--bg-blur));
    transform: scale(1.1);
    z-index: -2;
    transition: background-position 0.1s ease-out;
}

/* darkend overlay */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 20%, rgba(96, 165, 250, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(96, 165, 250, 0.1) 0%, transparent 40%),
        rgba(0, 0, 0, var(--bg-darken));
    pointer-events: none;
    z-index: -1;
}

/* Desktop */
@media (min-width: 769px) {
    .container {
        display: flex;
        height: 100vh;
        overflow: hidden;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .container {
        display: flex;
        flex-direction: column;
        height: 100vh;
        overflow: hidden;
    }
}