:root{color:#e2e8f0;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:#020617;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-weight:400;line-height:1.5}*{box-sizing:border-box}html{scroll-behavior:smooth;background:#020617}body{background:#020617;min-width:320px;min-height:100vh;margin:0}body,button,input,textarea,select{font:inherit}button{border:0}a{color:inherit;text-decoration:none}img,picture,svg,canvas{max-width:100%;display:block}#root{min-height:100vh}::selection{color:#f8fafc;background:#38bdf859}.app-shell{box-sizing:border-box;background:radial-gradient(circle at 0 0,#6366f138,#0000 30%),radial-gradient(circle at 100% 100%,#0ea5e92e,#0000 28%),linear-gradient(135deg,#0f172a 0%,#111827 45%,#172554 100%);grid-template-columns:minmax(0,1.1fr) minmax(320px,430px);align-items:center;gap:2rem;min-height:100svh;padding:2rem;display:grid}.hero-panel{color:#dbeafe;flex-direction:column;gap:1.25rem;padding:2rem 1rem 2rem 0;display:flex}.eyebrow{color:#bfdbfe;letter-spacing:.08em;text-transform:uppercase;background:#0f172a4d;border:1px solid #bfdbfe3d;border-radius:999px;width:fit-content;margin:0;padding:.45rem .8rem;font-size:.78rem;font-weight:700}.hero-panel h1{letter-spacing:-.05em;color:#f8fafc;margin:0;font-size:clamp(2.8rem,5vw,4.8rem);line-height:.95}.hero-copy{color:#dbeafee0;max-width:34rem;margin:0;font-size:1.08rem;line-height:1.7}.feature-list{flex-wrap:wrap;gap:.75rem;display:flex}.feature-list span{color:#e2e8f0;background:#1e293bb8;border:1px solid #94a3b838;border-radius:999px;padding:.75rem 1rem;font-size:.92rem;box-shadow:inset 0 1px #ffffff0d}.calculator-card{-webkit-backdrop-filter:blur(24px);backdrop-filter:blur(24px);background:#ffffff1a;border:1px solid #ffffff26;border-radius:2rem;flex-direction:column;gap:1.25rem;padding:1.4rem;display:flex;box-shadow:0 30px 60px #0f172a59,inset 0 1px #ffffff29}.display-panel{text-align:right;background:linear-gradient(#0f172aeb,#1e293be0);border:1px solid #94a3b826;border-radius:1.5rem;flex-direction:column;justify-content:flex-end;min-height:10rem;padding:1.35rem;display:flex}.display-label{color:#93c5fd;min-height:1.5rem;margin:0;font-size:.95rem}.display-value{text-overflow:ellipsis;letter-spacing:-.06em;color:#f8fafc;font-variant-numeric:tabular-nums;margin-top:.6rem;font-size:clamp(2.8rem,6vw,4rem);line-height:1;display:block;overflow:hidden}.keypad{flex-direction:column;gap:.8rem;display:flex}.keypad-row{grid-template-columns:repeat(4,minmax(0,1fr));gap:.8rem;display:grid}.keypad-row--top{grid-template-columns:repeat(3,minmax(0,1fr))}.keypad-row--bottom{grid-template-columns:2fr 1fr 1fr}.button{appearance:none;min-height:4.2rem;font:inherit;color:#eff6ff;cursor:pointer;background:linear-gradient(#1e293bf2,#0f172af2);border:0;border-radius:1.3rem;padding:.9rem;font-size:1.2rem;font-weight:700;transition:transform .14s,box-shadow .14s,background .14s,opacity .14s;box-shadow:inset 0 1px #ffffff0f,0 10px 20px #0206173d}.button:hover{transform:translateY(-1px);box-shadow:inset 0 1px #ffffff14,0 14px 24px #02061747}.button:active{transform:translateY(1px)scale(.99)}.button:focus-visible{outline-offset:2px;outline:3px solid #60a5fa8c}.button--ghost{color:#f8fafc;background:linear-gradient(#475569eb,#334155eb)}.button--accent,.button--equals{color:#eff6ff;background:linear-gradient(#38bdf8 0%,#2563eb 100%)}.button--equals{box-shadow:inset 0 1px #ffffff2e,0 14px 24px #2563eb57}.button--wide{justify-content:flex-start;padding-left:1.4rem}.is-active{background:linear-gradient(#f59e0b 0%,#ea580c 100%);box-shadow:inset 0 1px #fff3,0 14px 24px #ea580c42}.calculator-footer{color:#e2e8f0db;flex-direction:column;gap:.4rem;padding:.2rem .25rem 0;font-size:.92rem;line-height:1.55;display:flex}.calculator-footer p{margin:0}.footer-note{color:#bae6fd}@media (width<=960px){.app-shell{grid-template-columns:1fr;padding:1.25rem}.hero-panel{padding:.5rem 0}.calculator-card{width:min(100%,31rem);margin:0 auto}}@media (width<=560px){.app-shell{gap:1.25rem;padding:1rem}.hero-panel h1{font-size:2.4rem}.hero-copy{font-size:1rem}.calculator-card{border-radius:1.5rem;padding:1rem}.display-panel{border-radius:1.2rem;min-height:8.5rem;padding:1rem}.button{border-radius:1rem;min-height:3.8rem;font-size:1.05rem}.keypad-row,.keypad-row--top,.keypad-row--bottom{gap:.65rem}}