:root{--canvas: #f4f6fb;--glass: rgba(255, 255, 255, .62);--glass-strong: rgba(255, 255, 255, .86);--glass-border: rgba(255, 255, 255, .85);--surface: rgba(255, 255, 255, .74);--solid: #ffffff;--subtle: rgba(241, 245, 249, .72);--track: rgba(148, 163, 184, .2);--line: rgba(148, 163, 184, .24);--line-strong: rgba(148, 163, 184, .42);--ink: #0f172a;--ink-2: #334155;--ink-3: #64748b;--ink-4: #94a3b8;--primary: #4f46e5;--primary-hover: #4338ca;--accent: #4f46e5;--accent-soft: rgba(79, 70, 229, .1);--untested: #cbd5e1;--mastered: #10b981;--practicing: #3b82f6;--weak: #f43f5e;--gold: #f59e0b;--pale-red: rgba(254, 226, 226, .8);--pale-red-ink: #b42318;--pale-blue: rgba(219, 234, 254, .8);--pale-blue-ink: #1d4ed8;--pale-green: rgba(209, 250, 229, .75);--pale-green-ink: #047857;--pale-yellow: rgba(254, 243, 199, .85);--pale-yellow-ink: #a16207;--radius: 18px;--radius-sm: 12px;--shadow-sm: 0 2px 8px rgba(31, 41, 90, .05);--shadow: 0 8px 28px rgba(31, 41, 90, .08);--shadow-lg: 0 16px 40px 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