:root{color-scheme:light;--page-plane:#f9f9f7;--surface-1:#fcfcfb;--text-primary:#0b0b0b;--text-secondary:#52514e;--text-muted:#898781;--gridline:#e1e0d9;--border:hsla(0,0%,4%,.1);--meter-fill:#2a78d6;--meter-track:#b7d3f6;--accent-button-bg:#256abf;--accent-button-text:#fff;--diff-easy:#1a7f37;--diff-medium:#9a6700;--diff-hard:#cf222e;--xp-gain:#1a7f37;--xp-loss:#cf222e;--level-up-bg:#fff8e1;--level-up-border:#d4a017;--level-up-text:#8a6300;--level-down-bg:#fdeceb;--level-down-border:#cf222e;--level-down-text:#a4271f;--streak-warn-bg:#fff4e5;--streak-warn-border:#b36b00;--streak-warn-text:#8a5200}@media (prefers-color-scheme:dark){:root{color-scheme:dark;--page-plane:#0d0d0d;--surface-1:#1a1a19;--text-primary:#fff;--text-secondary:#c3c2b7;--text-muted:#898781;--gridline:#2c2c2a;--border:hsla(0,0%,100%,.1);--meter-fill:#3987e5;--meter-track:#184f95;--accent-button-bg:#3987e5;--accent-button-text:#0b0b0b;--diff-easy:#3fb950;--diff-medium:#d29922;--diff-hard:#f85149;--xp-gain:#3fb950;--xp-loss:#f85149;--level-up-bg:#2b2210;--level-up-border:#d4a017;--level-up-text:#e3b341;--level-down-bg:#2d1614;--level-down-border:#f85149;--level-down-text:#ff7b72;--streak-warn-bg:#2b2210;--streak-warn-border:#d29922;--streak-warn-text:#e3b341}}*{box-sizing:border-box}body{background:var(--page-plane);color:var(--text-primary)}@keyframes levelUpPulse{0%{transform:scale(1)}40%{transform:scale(1.04)}to{transform:scale(1)}}@keyframes levelDownShake{0%,to{transform:translateX(0)}25%{transform:translateX(-3px)}75%{transform:translateX(3px)}}@keyframes badgePop{0%{transform:scale(.85);opacity:0}to{transform:scale(1);opacity:1}}.level-up-pulse{animation:levelUpPulse .5s ease}.level-down-shake{animation:levelDownShake .4s ease}.badge-pop{animation:badgePop .35s ease}