/* Calculator — Ultra-modern redesign */
*{box-sizing:border-box}
body{margin:0;background:var(--wn-bg,#f5f5f7);font-family:var(--wn-font,''Inter'',system-ui,sans-serif);color:var(--wn-text,#1c1c1e);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
.page-wrap{max-width:920px;margin:0 auto;padding:52px 28px 80px}
.header{margin-bottom:44px}
.header-eyebrow{display:inline-block;font-size:.68rem;font-weight:600;letter-spacing:.09em;text-transform:uppercase;color:var(--accent,#635bff);background:rgba(99,91,255,.08);padding:4px 12px;border-radius:999px;margin-bottom:18px}
.header-title{margin:0 0 12px;font-size:clamp(1.65rem,3.2vw,2.25rem);font-weight:740;letter-spacing:-.045em;line-height:1.15;color:var(--wn-text,#1c1c1e)}
.header-sub{margin:0 0 22px;font-size:1rem;line-height:1.65;color:var(--muted,#6e6e73);max-width:520px}
.formula{display:inline-flex;align-items:center;gap:8px;padding:10px 16px;background:var(--wn-surface,#fff);border:1px solid var(--wn-border,#e5e5ea);border-radius:10px;font-size:.82rem;color:var(--muted,#6e6e73);font-family:''SF Mono'',''Fira Code'',ui-monospace,monospace;line-height:1.5}
.formula strong{color:var(--wn-text,#1c1c1e);font-weight:600;font-family:inherit}
.layout{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}
.panel{background:var(--wn-surface,#fff);border:1px solid var(--wn-border,#e5e5ea);border-radius:16px;overflow:hidden}
.panel-body{padding:28px}
.block-title{margin:0 0 22px;font-size:.65rem;letter-spacing:.10em;text-transform:uppercase;color:var(--muted,#6e6e73);font-weight:600}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:7px}
.field label{font-size:.80rem;font-weight:500;color:var(--wn-text,#1c1c1e);letter-spacing:-.01em}
.field input,.field select{width:100%;height:42px;padding:0 14px;border:1px solid var(--wn-border,#e5e5ea);border-radius:10px;background:var(--wn-bg,#f5f5f7);font-family:var(--wn-font,''Inter'',system-ui,sans-serif);font-size:.90rem;color:var(--wn-text,#1c1c1e);outline:none;transition:border-color .15s,background .15s,box-shadow .15s;-webkit-appearance:none;appearance:none}
.field input:focus,.field select:focus{border-color:var(--accent,#635bff);background:var(--wn-surface,#fff);box-shadow:0 0 0 3px rgba(99,91,255,.10)}
.actions{display:flex;gap:10px;margin-top:24px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;height:40px;padding:0 20px;border:1px solid var(--wn-border,#e5e5ea);border-radius:10px;font-family:var(--wn-font,''Inter'',system-ui,sans-serif);font-size:.875rem;font-weight:600;background:var(--wn-surface,#fff);color:var(--muted,#6e6e73);cursor:pointer;transition:background .14s,border-color .14s,color .14s;letter-spacing:-.01em;white-space:nowrap}
.btn:hover{background:var(--wn-bg,#f5f5f7);border-color:#c7c7cc;color:var(--wn-text,#1c1c1e)}
.btn-primary{background:var(--accent,#635bff);border-color:var(--accent,#635bff);color:#fff}
.btn-primary:hover{background:var(--accent-ink,#4f46e5);border-color:var(--accent-ink,#4f46e5);color:#fff}
.note{margin:14px 0 0;font-size:.74rem;color:#aeaeb2;line-height:1.5;letter-spacing:-.005em}
.result-wrap{display:flex;flex-direction:column}
.result-row{display:flex;justify-content:space-between;align-items:baseline;padding:14px 0;border-bottom:1px solid var(--wn-border-light,#f2f2f7);gap:16px}
.result-row:last-child{border-bottom:none;padding-bottom:0}
.result-label{font-size:.84rem;color:var(--muted,#6e6e73);line-height:1.4}
.result-value{font-size:1rem;font-weight:700;color:var(--wn-text,#1c1c1e);letter-spacing:-.025em;text-align:right}
.insight{margin-top:16px;padding:14px 16px;background:rgba(99,91,255,.05);border-left:3px solid var(--accent,#635bff);border-radius:0 10px 10px 0;font-size:.84rem;line-height:1.6;color:#3730a3}
.error{padding:12px 16px;background:#fff1f2;border:1px solid #fecaca;border-radius:10px;font-size:.84rem;line-height:1.5;color:#9f1239}
@media(max-width:900px){.page-wrap{padding:28px 16px 60px}.header{margin-bottom:28px}.header-title{font-size:clamp(1.4rem,5.5vw,2rem)}.layout,.grid{grid-template-columns:1fr}.panel-body{padding:20px}}