:root{color-scheme:light dark;--bg:light-dark(#f5f7fb,#151923);--surface:light-dark(#fff,#1d2432);--text:light-dark(#182230,#edf1f7);--muted:light-dark(#556175,#acb7ca);--line:light-dark(#d5dce5,#3a4557);--accent:light-dark(#304aba,#a5b7ff);--accentbg:light-dark(#edf1ff,#283558)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.5 system-ui,sans-serif}main{max-width:1200px;margin:auto;padding:30px 24px}header{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:24px}h1{font-size:clamp(1.8rem,4vw,2.5rem);margin:4px 0;letter-spacing:-.04em}h2{font-size:1.15rem;margin:0 0 18px}h3{font-size:1rem;margin:0 0 18px;font-weight:500}.eyebrow{font-size:.8rem;letter-spacing:.13em;color:var(--muted)}.layout{display:grid;grid-template-columns:minmax(260px,340px) minmax(0,1fr);gap:24px;align-items:start}.panel{padding:24px;background:var(--surface);border:1px solid var(--line);border-radius:14px;margin-bottom:24px}.controls label{margin-top:16px}label{display:grid;gap:8px;font-size:.9rem}input,select,button{font:inherit;color:var(--text);background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:11px;width:100%;min-width:0}button{cursor:pointer;width:auto;font-size:.9rem}button:hover{border-color:var(--accent)}button:disabled{opacity:.5;cursor:default}input:read-only{background:var(--bg);color:var(--muted)}:focus-visible{outline:3px solid var(--accent);outline-offset:3px}.muted{color:var(--muted);font-size:.875rem}.pair{display:grid;grid-template-columns:1fr 1fr;gap:18px}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.card{background:var(--surface);border:1px solid var(--line);padding:20px 16px;border-radius:12px}.card.primary{background:var(--accentbg);border-color:var(--accent)}.card h3 span{display:block;color:var(--muted);font-size:.875rem}.card output{font-size:clamp(1.4rem,2.6vw,2rem);letter-spacing:-.04em;white-space:nowrap}.card p{font-size:.8rem;color:var(--muted);margin:6px 0}.result-heading{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}.tag{font-size:.8rem;color:var(--muted)}output{display:block;font-variant-numeric:tabular-nums;font-weight:650}.notice{padding:14px 16px;background:var(--accentbg);border-radius:8px;font-size:.9rem}.history output{font-size:1.5rem;margin:8px 0}dl{margin:0}dl div{display:flex;justify-content:space-between;gap:24px;padding:12px 0;border-bottom:1px solid var(--line)}dl div:last-child{border:0}dt{color:var(--muted);font-size:.9rem}dd{margin:0;text-align:right;font-variant-numeric:tabular-nums}summary{cursor:pointer;font-weight:600;padding:8px 0}details p{font-size:.9rem}pre{white-space:pre-wrap;overflow-wrap:anywhere;background:var(--bg);padding:16px;border-radius:8px;font-size:.85rem}a{color:var(--accent)}footer{font-size:.875rem;color:var(--muted);padding:0 0 24px}#error{color:light-dark(#a71919,#ffaaa4);margin:12px 0}[hidden]{display:none!important}#history-file{max-width:100%}@media(max-width:850px){.layout{grid-template-columns:1fr}.controls{display:grid;grid-template-columns:1fr 1fr;gap:0 20px}.controls h2,.controls>p,.controls>details,#forecast-controls{grid-column:1/-1}}@media(max-width:540px){main{padding:20px 14px}header{align-items:flex-start;flex-direction:column}.controls{display:block}.panel{padding:18px}.cards{grid-template-columns:1fr}.card h3 span{display:inline;margin-left:8px}.card output{font-size:2rem}.pair{grid-template-columns:1fr}dl div{flex-direction:column;gap:4px}dd{text-align:left}}