:root{--paper: #F6F1E7;--paper-deep: #ECE5D5;--ink: #14161B;--ink-soft: #2A2F3A;--panel: #0F1620;--panel-soft: #1A2230;--panel-line: #2C3645;--rail: #4A5468;--on-panel: #E8E4D7;--on-panel-dim: #8A92A2;--st-operational: #4FB3A7;--st-tunneling: #E63946;--st-excavating: #F4A261;--st-structure-done: #2D6A4F;--st-finishing: #9D4EDD;--st-planned: #6B7280;--shadow-1: 0 1px 2px rgba(0,0,0,.05), 0 4px 14px rgba(15, 22, 32, .08);--shadow-2: 0 2px 6px rgba(0,0,0,.08), 0 16px 40px rgba(15, 22, 32, .12);--font-ui: "Onest", "PT Root UI", system-ui, sans-serif;--font-mono: "JetBrains Mono", ui-monospace, 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