:root{color:#11245d;font-synthesis:none;--ink:#11245d;--muted:#60709b;--blue:#2459e6;--cyan:#08c7e9;--line:#2b53af24;--ease-out:cubic-bezier(.23, 1, .32, 1);background:#f3f7ff;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{min-width:320px;margin:0}button,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}.shell{background:radial-gradient(circle at 86% 12%,#08c7e926,#0000 26rem),linear-gradient(135deg,#f8fbff 0%,#eef4ff 100%);min-height:100vh;overflow:hidden}.topbar{border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#ffffffbd;justify-content:space-between;align-items:center;height:76px;padding:0 clamp(20px,5vw,72px);display:flex}.brand{color:var(--ink);letter-spacing:-.04em;align-items:center;gap:10px;font-size:1.35rem;font-weight:800;text-decoration:none;display:inline-flex}.brand>span:last-child 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h2{font-size:1.35rem}.tool-close{width:34px;height:34px;color:var(--muted);cursor:pointer;background:#eef4ff;border:0;border-radius:50%;place-items:center;display:grid}.calc-topic-row,.calc-tabs{flex-wrap:wrap;gap:7px;padding:15px 20px 0;display:flex}.calc-topic-row button,.calc-tabs button,.calc-keys button{border:1px solid var(--line);cursor:pointer;background:#f8faff;border-radius:8px}.calc-topic-row button{color:var(--muted);padding:7px 10px;font-size:.72rem}.calc-topic-row button.active,.calc-tabs button.active{color:#fff;border-color:var(--blue);background:var(--blue)}.calc-screen{text-align:right;background:#122760;border-radius:13px;margin:18px 20px 0;padding:14px 16px}.calc-screen small,.calc-screen strong{text-overflow:ellipsis;white-space:nowrap;display:block;overflow:hidden}.calc-screen small{color:#a9c0ff;min-height:18px;font-size:.78rem}.calc-screen strong{color:#fff;margin-top:5px;font-size:1.65rem}.calc-tabs{padding-top:13px}.calc-tabs 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