:root{--bg: #f4f6fa;--surface: #ffffff;--surface-2: #f8fafc;--border: #e2e7f0;--border-strong: #cbd4e1;--text: #18202e;--muted: #5d6b81;--primary: #2563eb;--primary-hover: #1e50c8;--primary-soft: #eff4ff;--ok: #16a34a;--ok-soft: #ecfdf3;--err: #dc2626;--err-soft: #fef2f2;--warn: #d97706;--warn-soft: #fffbeb;--code-bg: #10141b;--code-head: #1a202b;--code-text: #d7dde7;--radius: 10px;--radius-sm: 6px;--shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 1px 3px rgba(16, 24, 40, .07);--font-mono: "Cascadia Code", "Fira Code", Consolas, monospace}*{box-sizing:border-box}html,body{margin:0;padding:0}body{min-height:100vh;background:var(--bg);background-image:linear-gradient(rgba(37,99,235,.1) 1px,transparent 1px),linear-gradient(90deg,rgba(37,99,235,.1) 1px,transparent 1px),linear-gradient(rgba(37,99,235,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(37,99,235,.055) 1px,transparent 1px);background-size:120px 120px,120px 120px,24px 24px,24px 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