:root{--font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "SF Mono", Monaco, "Cascadia Code", monospace;--header-height: 56px;--panel-width: 360px;--stats-bar-height: 48px;--transition-speed: .2s;--color-bg: #0a0a0a;--color-bg-elevated: #141414;--color-text: #ffffff;--color-muted: rgba(255, 255, 255, .5);--color-border: rgba(255, 255, 255, .12);--color-border-strong: rgba(255, 255, 255, .2);--color-hover: rgba(255, 255, 255, .08);--color-active: rgba(255, 255, 255, .12);--color-overlay: rgba(0, 0, 0, .6);--color-panel: #1a1a1a;--color-danger: #ef4444;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .5);--shadow-panel: -4px 0 24px rgba(0, 0, 0, .5);--face-front: #16a34a;--face-back: #2563eb;--face-up: #fafafa;--face-down: #fbbf24;--face-right: #dc2626;--face-left: #ea580c;--color-bg-start: #0a0a0a;--color-bg-end: #0a0a0a;--color-button-bg: transparent;--color-button-text: 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