:root{--bg:#f7fafb;--surface:#ffffff;--text:#101418;--muted:#4f5d67;--border:#dce5ea;--accent:#00bcd4;--accent-soft:#e2fbff;--max:920px}[data-theme=dark]{--bg:#0b1116;--surface:#111920;--text:#eaf2f5;--muted:#9db0bb;--border:#263642;--accent:#37d6eb;--accent-soft:#0f2a31}*{box-sizing:border-box}html{scroll-behavior:smooth}body{position:relative;margin:0;background:radial-gradient(1e3px 500px at -10% -10%,rgba(0,188,212,.22),transparent 55%),radial-gradient(1100px 600px at 110% 0%,rgba(58,123,213,.2),transparent 58%),radial-gradient(900px 550px at 40% 120%,rgba(0,255,187,.14),transparent 60%),linear-gradient(30deg,color-mix(in srgb,var(--accent) 16%,transparent) 12%,transparent 12.5%,transparent 87%,color-mix(in srgb,var(--accent) 11%,transparent) 87.5%,color-mix(in srgb,var(--accent) 11%,transparent)),linear-gradient(150deg,color-mix(in srgb,#3a7bd5 10%,transparent) 12%,transparent 12.5%,transparent 87%,color-mix(in srgb,#3a7bd5 13%,transparent) 87.5%,color-mix(in srgb,#3a7bd5 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