:root{ --blue:#0b5ea8; --muted:#6b7280; }
.dr-simple-root{ max-width:880px; margin:20px auto; padding:18px; font-family:Inter, system-ui, -apple-system, 'Segoe UI', Roboto, Arial; color:#0b1220; background:#fff; }
.dr-simple-header h1{ font-size:26px; margin:0 0 6px; color:var(--blue); }
.dr-simple-sub{ color:var(--muted); margin:0 0 8px; font-size:15px; }
.dr-simple-author{ font-size:13px; color:#374151; margin-bottom:14px; }

.dr-simple-calculator{ display:flex; flex-direction:column; gap:12px; }
@media(min-width:860px){ .dr-simple-calculator{ flex-direction:row; } }
.dr-simple-controls{ flex:1; background:#fbfdff; padding:14px; border-radius:10px; box-shadow:0 6px 18px rgba(2,6,23,0.04); }
.dr-simple-controls label{ display:block; margin-top:10px; font-weight:600; font-size:15px; }
.dr-simple-controls input{ width:100%; padding:10px; margin-top:6px; border-radius:8px; border:1px solid #e6eef9; font-size:16px; }
.dr-simple-actions{ margin-top:12px; display:flex; gap:10px; flex-wrap:wrap; }
.dr-simple-btn{ background:var(--blue); color:#fff; padding:10px 12px; border-radius:8px; border:none; cursor:pointer; font-size:15px; }

.dr-simple-results{ width:100%; background:linear-gradient(180deg, rgba(238,246,255,0.6), rgba(255,250,240,0.4)); padding:14px; border-radius:10px; box-shadow:0 6px 18px rgba(2,6,23,0.04); }
@media(min-width:860px){ .dr-simple-results{ width:340px; } }
.dr-simple-grid{ display:grid; grid-template-columns:1fr 1fr; gap:8px; font-size:15px; margin-bottom:4px; }
@media(max-width:860px){ .dr-simple-grid{ grid-template-columns:1fr; } }