:root{--bg: #f7f9fb;--surface: #ffffff;--surface-alt: #f1f4f7;--border: #e4e9ee;--text: #1b232c;--text-muted: #5f6e7e;--primary: #1a5f7a;--primary-ink: #ffffff;--accent: #f3a712;--error: #b4231f;--error-bg: #fdeded;--highlight: #fff6df;--radius: 10px;--shadow: 0 1px 3px rgba(0,0,0,.06), 0 2px 10px rgba(0,0,0,.04)}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3{line-height:1.2;margin:0 0 .5em}h1{font-size:1.6rem}h2{font-size:1.25rem}h3{font-size:1.05rem}.muted{color:var(--text-muted)}.small{font-size:.85rem}.error{color:var(--error);background:var(--error-bg);padding:.6rem .8rem;border-radius:var(--radius);margin:.75rem 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