:root{color-scheme:light dark;--bg:#f6f7f4;--surface:#fff;--ink:#172b36;--muted:#566b73;--line:#dbe3e1;--accent:#146a60;--tint:#e6f3ef;--error:#a62932;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);line-height:1.65}a{color:var(--accent);text-underline-offset:4px}button,input,select,textarea{font:inherit}button,select{cursor:pointer}button,input,select,textarea{border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink);min-height:46px;padding:10px 13px}button:hover{border-color:var(--accent)}:focus-visible{outline:3px solid var(--accent);outline-offset:3px}.skip{position:absolute;left:-9999px}.skip:focus{left:15px;top:12px;z-index:9;background:var(--surface);padding:10px}header{background:var(--surface);border-bottom:1px solid var(--line)}.bar{max-width:1160px;margin:auto;display:flex;align-items:center;gap:12px;padding:16px 24px}.brand{font-size:20px;font-weight:800;color:var(--ink);text-decoration:none;white-space:nowrap;display:flex;align-items:center;gap:10px}.mark{display:grid;place-items:center;background:var(--accent);color:#fff;border-radius:11px;width:36px;height:36px;font-size:24px}.header-controls{margin-left:auto;display:flex;align-items:center;gap:8px}#language{max-width:190px}#theme{width:46px;padding:0}main{max-width:1100px;margin:auto;padding:36px 24px 56px}.hero{max-width:760px;margin:0 0 28px}.eyebrow{color:var(--accent);font-weight:700;font-size:13px;letter-spacing:.06em}h1{font-size:clamp(27px,4.5vw,44px);line-height:1.2;letter-spacing:-.03em;margin:14px 0}h2{font-size:23px;line-height:1.35}h3{font-size:18px}p{margin:12px 0;color:var(--muted)}.categories{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0}.pill{padding:4px 12px;border:1px solid var(--line);border-radius:20px;font-size:14px}.cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.card{border:1px solid var(--line);background:var(--surface);border-radius:16px;padding:22px;text-decoration:none;display:flex;flex-direction:column;gap:6px;transition:border-color .15s,transform .15s}.card:hover{border-color:var(--accent);transform:translateY(-2px)}.card h2{font-size:18px;color:var(--ink);margin:10px 0 0}.card p{font-size:14px;margin:8px 0}.icon{font-size:27px;font-weight:750;color:var(--accent)}.workspace{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:26px;max-width:820px}.fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}label{display:flex;flex-direction:column;gap:7px;font-weight:650;min-width:0}input,select,textarea{width:100%;min-width:0;font-weight:400}textarea{min-height:145px;resize:vertical}.full{grid-column:1/-1}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.primary{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:700}button:disabled{opacity:.55;cursor:default}.results{background:var(--tint);border-radius:13px;margin:22px 0 0;padding:18px 20px}dl{display:grid;grid-template-columns:minmax(90px,1fr) 2fr;gap:8px 14px;margin:0}dt{color:var(--muted)}dd{margin:0;text-align:right;font-size:24px;font-weight:750;overflow-wrap:anywhere}.hint{font-size:14px}#error{color:var(--error);margin:12px 0 0;min-height:26px}.result-actions{display:flex;align-items:center;gap:12px;margin-top:12px}#copy-status{font-size:14px}.guide{max-width:820px;margin-top:36px}.guide section{padding:18px 0;border-top:1px solid var(--line)}.formula,.example{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;background:var(--surface);padding:14px 18px;border-radius:10px;border:1px solid var(--line);overflow-wrap:anywhere;white-space:pre-wrap}.related{display:flex;flex-wrap:wrap;gap:10px}.related a{border:1px solid var(--line);border-radius:10px;padding:8px 12px;text-decoration:none;background:var(--surface)}details summary{cursor:pointer;font-weight:700}.footer{max-width:1100px;margin:auto;padding:24px;border-top:1px solid var(--line)}.footer p{font-size:13px;max-width:800px}.footer details{font-size:14px;margin:15px 0}.footer a{font-size:14px}.back{font-size:14px}.home-guide{margin-top:30px}.notice{font-size:13px;color:var(--muted)}[data-theme=dark]{--bg:#111d22;--surface:#18292f;--ink:#e7efed;--muted:#b1c3c5;--line:#34464b;--accent:#80d4bb;--tint:#203d3d;--error:#ffa3a6;color-scheme:dark}[data-theme=dark] .primary{color:#102c24}[data-theme=dark] .mark{color:#102c24}@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#111d22;--surface:#18292f;--ink:#e7efed;--muted:#b1c3c5;--line:#34464b;--accent:#80d4bb;--tint:#203d3d;--error:#ffa3a6;color-scheme:dark}:root:not([data-theme=light]) .primary,:root:not([data-theme=light]) .mark{color:#102c24}}@media(max-width:900px){.cards{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:520px){.bar{padding:14px 16px;gap:8px}.brand{font-size:17px}.mark{width:32px;height:32px}#language{max-width:132px;font-size:14px}.header-controls{gap:6px}main{padding:26px 16px 40px}.cards{gap:12px}.card{padding:16px}.card h2{font-size:16px}.workspace{padding:18px}.fields{grid-template-columns:1fr}.full{grid-column:auto}.results{padding:16px}dd{font-size:22px}.footer{padding:20px 16px}.categories{gap:6px}.pill{font-size:12px}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

.card,.hero,.related a,.pill,dt{min-width:0;overflow-wrap:anywhere}input,select,textarea{max-width:100%;min-width:0}code{display:block;overflow-wrap:anywhere}.results{margin-top:20px}.results button{margin-top:12px}#copy-status{margin-left:8px}