:root{--tp-border:#d7dfeb;--tp-text:#152238;--tp-text-soft:#5f6f86;--tp-primary:#1a73e8;--tp-primary-dark:#0f52ba;--tp-primary-soft:#e8f0fe;--tp-primary-border:#c8dafc;--tp-white:#ffffff;--tp-shadow:0 20px 40px rgba(17,34,68,0.08)}*{box-sizing:border-box}body,html{margin:0;padding:0;min-height:100%;font-family:Inter,Arial,sans-serif;color:var(--tp-text);background:radial-gradient(circle at top right,rgba(26,115,232,.08),transparent 30%),linear-gradient(180deg,#f5f8fd,#eef3f9)}body{min-height:100vh}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button,input{font:inherit}.demo-page{min-height:100vh;padding:36px 20px}.demo-shell{max-width:1120px;margin:0 auto;background:var(--tp-white);border:1px solid var(--tp-border);border-radius:28px;box-shadow:var(--tp-shadow);padding:28px}.demo-topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-bottom:18px;border-bottom:1px solid 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