:root {
    --fn-primary: #00ff88;
    --fn-primary-dim: #00cc6a;
    --fn-secondary: #ff0055;
    --fn-bg-dark: #0a0e1a;
    --fn-text-primary: #2d3748;
    /* Darker text for better contrast on white backgrounds, or use white for dark mode */
    --fn-text-light: #e8edf4;
    --fn-accent-blue: #00d4ff;
    --fn-accent-purple: #a855f7;
}

/* Floating Navigation Buttons */
.floating-nav {
    position: fixed;
    bottom: 90px;
    right: 30px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 10000;
}

.float-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: none;
    cursor: pointer;
    font-family: 'Space Mono', 'Consolas', monospace;
    color: var(--fn-text-light);
}

.float-btn svg {
    flex-shrink: 0;
}

.float-btn span {
    white-space: nowrap;
}

.home-btn {
    background: linear-gradient(135deg, var(--fn-secondary), var(--fn-accent-purple));
    color: white;
}

.home-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(168, 85, 247, 0.5);
}

.tutorials-btn {
    background: linear-gradient(135deg, var(--fn-accent-blue), var(--fn-primary));
    color: var(--fn-bg-dark);
}

.tutorials-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 212, 255, 0.5);
}

.scroll-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: linear-gradient(135deg, var(--fn-primary), var(--fn-primary-dim));
    color: var(--fn-bg-dark);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 10001;
    /* Ensure it's on top */
}

.scroll-top-btn.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 255, 136, 0.5);
}