/* Calculator styles */
:root{
  --ink:#0b1220;
  --panel:#111a2e;
  --line:rgba(255,255,255,0.08);
  --soft:rgba(255,255,255,0.06);
  --brand:#2563eb;
  --paper:#f7f4ee;
}
*{box-sizing:border-box}
body{margin:0;font-family: ui-sans-serif, -apple-system, Segoe UI, Roboto, Helvetica, Arial}

.calc-body{background:#0b1220;color:#fff;min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}
.calc-wrap{width:100%;max-width:460px}
.title{margin:0 0 12px 0;font-size:18px;font-weight:800}
.display{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:16px;text-align:right;font-size:42px;font-weight:800;margin-bottom:12px}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.key{height:64px;border-radius:16px;border:1px solid var(--line);background:var(--soft);color:#fff;font-weight:800;font-size:18px}
.key.op{background:rgba(37,99,235,0.25);border-color:rgba(37,99,235,0.45)}
.key.eq{background:var(--brand);border-color:rgba(255,255,255,0.12)}
.key.soft{background:rgba(255,255,255,0.12)}
.hint{opacity:.7;margin-top:10px}

/* Editor styles */
.editor-body{background:var(--paper);min-height:100vh;padding:16px}
.editor{
  width:100%;height:calc(100vh - 90px);
  border:none;outline:none;border-radius:12px;
  background:var(--paper);padding:16px;
  font-family: Courier, monospace;font-size:16px;line-height:22px;color:#0b0f18;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,.08);
}
.exit{
  position:fixed;right:16px;top:16px;
  border:none;border-radius:12px;padding:10px 14px;
  background:rgba(0,0,0,0.08);color:#0b0f18;font-weight:800;cursor:pointer;
}