FOCUS SCORE: Discipline indicator. Caps at 100. Tab switching reduces it. High scores unlock leaderboard ranks.

HARD FOCUS: Unbreakable study contract. Minimal 45 min. Exit penalty: -40 FS. All UI except timer is locked.

LIVE NODES: Global competition. Users studying right now are pinned to the top. Graph shows real-time intensity.

SHORTCUTS: [Space] Toggle, [R] Reset, [L] Leaderboard, [H] Hard Focus, [M/P/C] Switch subjects.