:root {
    --bg-color: #f8fafc;
    --text-color: #1e293b;
}

body.dark-mode {
    --bg-color: #0f172a;
    --text-color: #f8fafc;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    overflow: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

#particleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.theme-toggle {
    position: fixed;
    top: 24px;
    right: 32px;
    background: transparent;
    border: none;
    font-size: 1.75rem;
    cursor: pointer;
    z-index: 100;
    transition: transform 0.2s ease;
    user-select: none;
}

.theme-toggle:hover {
    transform: scale(1.15);
}