.hdcalc { --paper:#f7f3eb; --ink:#292823; --rust:#914831; --line:#d6cbbb; color:var(--ink); background:var(--paper); font:16px/1.6 Georgia, 'Times New Roman', serif; max-width:1160px; margin:0 auto; padding:32px; overflow-wrap:anywhere; }
.hdcalc *, .hdcalc *::before, .hdcalc *::after { box-sizing:border-box; }
.hdcalc [hidden] { display:none !important; }
.hdcalc h2 { font:normal clamp(26px,3vw,38px)/1.15 Georgia,serif; margin:0 0 20px; color:var(--ink); }
.hdcalc h3 { font:600 16px/1.4 system-ui,sans-serif; margin:18px 0 8px; color:var(--ink); }
.hdcalc p { margin:0 0 18px; }
.hdcalc .hdcalc-eyebrow { font:600 11px/1.5 system-ui,sans-serif; letter-spacing:2px; color:var(--rust); }
.hdcalc .hdcalc-intro { max-width:780px; padding-bottom:20px; }
.hdcalc .hdcalc-layout { display:grid; grid-template-columns:minmax(0,1.35fr) minmax(0,1fr); gap:32px; align-items:start; }
.hdcalc fieldset { min-width:0; margin:0 0 24px; padding:18px 0 0; border:0; border-top:1px solid var(--line); }
.hdcalc legend { font:600 14px/1.5 system-ui,sans-serif; padding:0 12px 0 0; }
.hdcalc .hdcalc-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:18px; }
.hdcalc label { display:block; font:600 13px/1.5 system-ui,sans-serif; margin-bottom:6px; }
.hdcalc input[type=text], .hdcalc select { display:block; width:100%; min-width:0; height:46px; padding:8px 10px; border:1px solid #8c8172; border-radius:2px; color:var(--ink); background:#fffcf6; font:16px system-ui,sans-serif; }
.hdcalc small, .hdcalc .hdcalc-note { display:block; color:#60584f; font:12px/1.6 system-ui,sans-serif; margin-top:6px; }
.hdcalc .hdcalc-error { display:block; color:#922c24; font:13px/1.5 system-ui,sans-serif; }
.hdcalc [aria-invalid=true] { border:2px solid #922c24; }
.hdcalc .hdcalc-errors { padding:16px; border:2px solid #922c24; margin-bottom:20px; }
.hdcalc .hdcalc-errors a { display:block; color:#922c24; margin:8px 0; }
.hdcalc .hdcalc-toggle { display:flex; gap:10px; align-items:center; margin:12px 0; }
.hdcalc .hdcalc-toggle input { width:20px; height:20px; accent-color:var(--rust); flex-shrink:0; }
.hdcalc .hdcalc-toggle label { margin:0; }
.hdcalc .hdcalc-actions { display:flex; flex-wrap:wrap; gap:10px; margin-top:20px; }
.hdcalc button { min-height:46px; padding:10px 16px; border:1px solid var(--rust); border-radius:2px; background:var(--rust); color:white; font:600 13px/1.5 system-ui,sans-serif; cursor:pointer; }
.hdcalc button.hdcalc-secondary { background:transparent; color:var(--ink); border-color:#8c8172; }
.hdcalc button:disabled { opacity:.5; cursor:default; }
.hdcalc :focus-visible, .hdcalc [tabindex="-1"]:focus { outline:3px solid #914831; outline-offset:4px; }
.hdcalc .hdcalc-estimate { background:#eee7da; padding:26px; border-top:3px solid var(--rust); }
.hdcalc .hdcalc-total strong { display:block; font:normal 54px/1.2 Georgia,serif; }
.hdcalc .hdcalc-total span, .hdcalc .hdcalc-periods span { display:block; font:14px system-ui,sans-serif; }
.hdcalc .hdcalc-periods { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:18px; padding:12px 0 22px; border-bottom:1px solid #c8baa6; }
.hdcalc .hdcalc-periods strong { display:block; font:normal 28px/1.4 Georgia,serif; }
.hdcalc dl { margin:0; }
.hdcalc dl div { display:flex; justify-content:space-between; gap:16px; padding:9px 0; border-bottom:1px solid var(--line); font-size:14px; }
.hdcalc dd { margin:0; text-align:right; }
.hdcalc summary { cursor:pointer; font:600 13px/1.6 system-ui,sans-serif; }
.hdcalc pre { white-space:pre-wrap; font:12px/1.6 system-ui,sans-serif; }
.hdcalc .hdcalc-method { border-top:1px solid var(--line); margin-top:40px; padding-top:30px; max-width:850px; }
@media (max-width:700px) { .hdcalc { padding:20px 16px; } .hdcalc .hdcalc-layout { grid-template-columns:minmax(0,1fr); gap:24px; } .hdcalc .hdcalc-grid { gap:16px 12px; } .hdcalc .hdcalc-estimate { padding:20px; } .hdcalc .hdcalc-method dl div { display:block; } .hdcalc .hdcalc-method dd { text-align:left; } }
@media (prefers-reduced-motion:reduce) { .hdcalc *, .hdcalc *::before, .hdcalc *::after { animation:none !important; transition:none !important; scroll-behavior:auto !important; } }
@media print { .hdcalc { max-width:none; padding:0; background:white; color:black; font-size:11pt; } .hdcalc .hdcalc-inputs, .hdcalc .hdcalc-actions, .hdcalc [data-status] { display:none; } .hdcalc .hdcalc-layout { display:block; } .hdcalc .hdcalc-estimate { background:white; padding:12px; } .hdcalc [data-results] { break-inside:avoid; } .hdcalc details > * { display:block; } .hdcalc .hdcalc-method { margin-top:18px; } }