:root{color:#f9fafb;background:#0f172a;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{min-height:100vh;margin:0}button{font:inherit}.app-shell{grid-template-columns:1fr .8fr;align-items:center;gap:20px;width:min(1050px,100%);min-height:100vh;margin:0 auto;padding:32px 18px;display:grid}.calculator-card,.history-card{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#0f172adb;border:1px solid #ffffff1f;border-radius:28px;padding:24px;box-shadow:0 24px 70px #00000052}.eyebrow{color:#93c5fd;text-transform:uppercase;letter-spacing:.14em;margin:0 0 6px;font-size:.75rem}h1,h2{margin:0}h1{font-size:clamp(2rem,6vw,4rem)}h2{margin-bottom:18px;font-size:1.2rem}.display{text-align:right;overflow-wrap:anywhere;background:#020617;border-radius:20px;min-height:92px;margin:24px 0;padding:20px;font-size:clamp(2rem,7vw,4.5rem)}.button-grid{grid-template-columns:repeat(4,1fr);gap:10px;display:grid}.button{color:#f9fafb;cursor:pointer;background:#1e293b;border:0;border-radius:18px;min-height:64px;transition:transform .12s,background .12s}.button:hover,.ghost:hover{background:#334155;transform:translateY(-1px)}.button:active,.ghost:active{transform:translateY(0)}.equals{background:#2563eb;grid-column:span 2}.equals:hover{background:#1d4ed8}.status-row{color:#cbd5e1;justify-content:space-between;align-items:center;gap:12px;margin-top:16px;font-size:.92rem;display:flex}.ghost{color:#f9fafb;cursor:pointer;background:0 0;border:1px solid #ffffff24;border-radius:999px;padding:8px 12px}.history-card p{color:#cbd5e1}ul{gap:10px;margin:0;padding:0;list-style:none;display:grid}li{background:#ffffff0f;border-radius:16px;justify-content:space-between;gap:14px;padding:14px;display:flex}li span{color:#cbd5e1;overflow-wrap:anywhere}@media (width<=780px){.app-shell{grid-template-columns:1fr;align-items:start}.button{min-height:58px}}