I'm not sure how to add a light/dark theme toggle, as I don't understand Java Script or Sheet Workers. Here is a link for the changed CSS Styling if you are a Pro Level Subscriber and make a custom sheet. Copy the HTML from here and the translations from 10", "reflex-12": "Reflex > 12", "reflex-14": "Reflex > 14", "reflex-skills": "Reflex Skills", "reflexes-abbr": "Ref", "reliability-abbrv": "Rel.", "reliable-abbr": "R", "remote": "Remote", "repair-build>": "Repair/Build", "requires-a-target-token": "Requires a target token", "resist-torture": "Resist Torture/Drugs", "resources": "Resources", "ricochet": "Ricochet/Indirect", "rifle": "Rifle", "right-arm": "R. Arm", "right-leg": "R. Leg", "role": "Role", "roll": "Roll", "roll-less-than": "Roll less than:", "rolls": "rolls", "round": "Round", "rounds": "Rounds", "run": "Run", "run-dot-net": "Run Dot Net", "run-dot-net-beta": "Run.Net 1.2 Beta", "run-dot-net-combat": "Run.Net Combat", "run-program": "Run Program", "running": "Running", "savate": "Savate", "savate-2": "Savate (2)", "save": "Save", "scan": "Scan", "scanner": " Scanner", "scope": "Scope", "secure": "Secure", "seduction": "Seduction", "sensor": "Sensor", "serious": "Serious", "shadow": "Shadow/Track", "shield": "Shield", "shooter": "Shooter", "shooting-from-hip": "Shooting from hip", "silhouetted": "Silhouetted", "simple": "Simple", "size": "Size", "skill": "Skill", "skill-setup": "Skill Setup", "skills": "Skills", "small": "Small", "smartgun": "Smartgun/Goggles", "social": "Social", "special-abilities": "Special Abilities", "speed": "Speed", "standard": " Standard", "stealth": "Stealth", "stealth-2": "Stealth (2)", "stock-market": "Stock Market", "str": "Str", "streetdeal": "Streetdeal", "streetwise": "Streetwise", "strength-feat": "Strength Feat", "style-and-motivations": "Style and Motivations", "submachinegun": "Submachinegun", "swimming": "Swimming", "system": "System", "system-knowledge": "System Knowledge", "tae-kwon-do": "Tae Kwon Do", "tae-kwon-do-3": "Tae Kwon Do (3)", "target": "Target", "target-points": "Target Points", "targeted": "Targeted", "targeted-roll": "Targeted Roll", "targeting": "Targeting", "teaching": "Teaching", "technical": "Technical", "technical-ability-abbr": "Tech", "technical-skills": "Technical Skills", "telescopic-extreme": "Telescopic, Extreme", "telescopic-long": "Telescopic, Long", "temporary-modifier-abbr": "Temp Mod", "thai-kick-boxing": "Thai Kick Boxing", "thai-kick-boxing-4": "Thai Kick Boxing (4)", "three-round-burst": "Three Round Burst", "tiny": "Tiny", "torso": "Torso", "total": "Total", "total-cost": "Total Cost", "tries-to-stay-in-the-fight": "tries to stay in the fight!", "trodes": " Trodes", "turret": "Turret", "two-weapons": "Two Weapons", "uninjured": "Uninjured", "unreliable-abbr": "UR", "user": "User/Runner", "utility": "Utility", "vectored-thrust-vehicle": "Vectored Thrust Vehicle", "vectored-thrust-vehicle-3": "Vectored Thrust Vehicle (3)", "vehicle": "Vehicle", "vehicle-mounted": "Vehicle Mounted", "very-reliable-abbr": "VR", "videoboard": " Videoboard", "voxbox": " Voxbox", "wardrobe": "Wardrobe & Style", "weapon": "Weapon", "weapon-accuracy-abbrv": "WA", "weapon-notes": "Weapon Notes", "weapons": "Weapons", "weaponsmith": "Weaponsmith", "weaponsmith-2": "Weaponsmith (2)", "wilderness-survival": "Wilderness Survival", "wrestling": "Wrestling", "wrestling-1": "Wrestling (1)", "yes": "Yes", "zoology": "Zoology" }" target="_blank">here .