:root{--ink:#17231e;--muted:#66736d;--paper:#f3efe5;--card:#fffdf8;--line:#d9ded9;--green:#0d6753;--green2:#084b3e;--mint:#dcefe6;--mint2:#eff8f3;--amber:#d79b3f;--amber2:#f2dfb9;--red:#9d5045;--shadow:0 24px 70px rgba(25,45,36,.10)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:radial-gradient(circle at 5% 0,rgba(215,155,63,.14),transparent 24%),radial-gradient(circle at 96% 2%,rgba(13,103,83,.10),transparent 28%),linear-gradient(180deg,#fcfaf4,#f3efe5);min-height:100vh}a{color:inherit}.shell{width:min(1180px,calc(100% - 28px));margin:auto;padding:15px 0 50px}.top{display:flex;align-items:center;justify-content:space-between;gap:14px}.brand{display:flex;align-items:center;gap:9px;text-decoration:none;font-weight:950;letter-spacing:-.03em}.brandmark{width:40px;height:40px;border-radius:13px;background:linear-gradient(145deg,var(--mint),#fff);border:1px solid #cbd9d2;position:relative}.brandmark:after{content:"";position:absolute;left:8px;top:15px;width:22px;height:17px;border:2px solid var(--green);border-radius:4px 4px 10px 10px;background:linear-gradient(180deg,transparent 52%,var(--amber) 53%)}.brandmark:before{content:"";position:absolute;left:15px;top:6px;width:8px;height:10px;border:2px solid var(--green);border-bottom:0;border-radius:3px 3px 0 0}.nav{display:flex;gap:5px;align-items:center;flex-wrap:wrap;justify-content:flex-end}.nav a{font-size:.72rem;font-weight:850;text-decoration:none;padding:8px 9px;border-radius:999px}.nav .active{background:var(--mint);color:var(--green)}.nav .lang{border:1px solid var(--line);background:#fff}.crumb{margin:20px 0 0;font-size:.72rem;color:var(--muted)}.crumb a{text-decoration:none}.hero{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:28px;align-items:center;padding:38px 0 22px}.kicker{font-size:.63rem;text-transform:uppercase;letter-spacing:.14em;font-weight:950;color:var(--green)}h1{font-size:clamp(2.6rem,5.6vw,5.1rem);letter-spacing:-.062em;line-height:.92;margin:9px 0 13px}h1 em{font-style:normal;color:var(--green)}.lead{max-width:760px;margin:0;color:var(--muted);font-size:.98rem;line-height:1.6}.hero-art{height:170px;position:relative}.hero-tile{position:absolute;right:7px;top:4px;width:150px;height:150px;border-radius:27px;background:linear-gradient(145deg,var(--green),var(--green2));color:#fff;padding:15px;box-shadow:var(--shadow);transform:rotate(3deg)}.hero-tile small{opacity:.75;font-weight:850}.hero-tile b{display:block;font-size:3.4rem;margin-top:24px;line-height:1}.hero-tile span{font-size:.65rem;opacity:.78}.section{margin-top:16px}.sectionhead{display:flex;align-items:end;justify-content:space-between;gap:12px;margin-bottom:10px}.sectionhead h2{margin:0;font-size:1.35rem;letter-spacing:-.04em}.sectionhead p{margin:0;color:var(--muted);font-size:.77rem}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.card{border:1px solid var(--line);background:rgba(255,253,248,.94);border-radius:20px;padding:17px;text-decoration:none;box-shadow:0 8px 25px rgba(25,45,36,.04)}.card:hover{border-color:#a8c8b9;transform:translateY(-1px)}.card small{display:block;color:var(--green);font-weight:950;text-transform:uppercase;letter-spacing:.1em;font-size:.58rem}.card h3{margin:7px 0 5px;font-size:1.02rem}.card p{margin:0;color:var(--muted);line-height:1.45;font-size:.78rem}.feature{border:1px solid var(--line);background:var(--card);border-radius:28px;padding:20px;box-shadow:var(--shadow)}.formula-big{min-height:130px;display:flex;align-items:center;justify-content:center;text-align:center;background:linear-gradient(145deg,var(--mint2),#fff);border:1px solid #cfe0d7;border-radius:22px;font-size:clamp(2.8rem,7vw,5.7rem);font-weight:950;letter-spacing:-.05em}.formula-big sub{font-size:.48em}.formula-big sup{font-size:.42em;color:var(--green)}.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:10px}.metric{border:1px solid var(--line);border-radius:15px;background:#fff;padding:11px}.metric small{display:block;color:var(--muted);font-size:.59rem;text-transform:uppercase;letter-spacing:.09em;font-weight:900}.metric b{display:block;margin-top:4px;font-size:1.05rem}.composition{margin-top:10px;border-top:1px solid var(--line)}.comp-row{display:grid;grid-template-columns:70px 1fr 90px;gap:10px;align-items:center;padding:10px 2px;border-bottom:1px solid #e6e8e5}.element-link{display:flex;align-items:center;gap:8px;text-decoration:none;font-weight:900}.element-chip{width:36px;height:36px;display:grid;place-items:center;border-radius:9px;background:var(--mint);color:var(--green)}.bar{height:8px;background:#e9ece9;border-radius:999px;overflow:hidden}.bar i{display:block;height:100%;width:var(--w);background:linear-gradient(90deg,var(--green),var(--amber));border-radius:inherit}.muted{color:var(--muted);font-size:.75rem}.prose{border:1px solid var(--line);background:rgba(255,253,248,.80);border-radius:20px;padding:17px;margin-top:10px}.prose p{margin:0 0 8px;color:#48564f;line-height:1.62;font-size:.88rem}.prose p:last-child{margin-bottom:0}.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.btn{border:1px solid var(--line);background:#fff;border-radius:13px;padding:10px 12px;font-weight:900;text-decoration:none;cursor:pointer}.btn.primary{background:var(--green);color:#fff;border-color:var(--green)}.input{width:100%;border:1px solid var(--line);border-radius:15px;background:#fff;padding:13px 14px;outline:none;font-weight:800}.input:focus{border-color:var(--green);box-shadow:0 0 0 3px rgba(13,103,83,.09)}.toolgrid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.result{border:1px solid #cfe0d7;background:linear-gradient(145deg,var(--mint2),#fff);border-radius:20px;padding:17px;min-height:150px}.result strong.big{font-size:2.2rem;letter-spacing:-.04em}.reaction{font-size:clamp(1.35rem,4vw,2.7rem);font-weight:950;text-align:center;padding:28px 10px;background:linear-gradient(145deg,var(--mint2),#fff);border:1px solid #cfe0d7;border-radius:20px}.reaction sub{font-size:.5em}.balance-table{width:100%;border-collapse:collapse;margin-top:10px}.balance-table th,.balance-table td{border-bottom:1px solid var(--line);padding:8px;text-align:center;font-size:.8rem}.balance-table th:first-child,.balance-table td:first-child{text-align:left}.gamebox{border:1px solid var(--line);background:var(--card);border-radius:28px;padding:18px;box-shadow:var(--shadow)}.scorebar{display:flex;justify-content:space-between;gap:8px;flex-wrap:wrap;margin-bottom:10px}.pill{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 11px;font-size:.72rem;font-weight:900}.ptable{min-width:860px;display:grid;grid-template-columns:repeat(18,1fr);grid-template-rows:repeat(7,48px);gap:3px}.ptablewrap{overflow:auto}.elcell{border:1px solid #d9ded9;background:#fff;border-radius:7px;padding:3px;cursor:pointer;font-size:.58rem;text-align:left}.elcell b{display:block;color:var(--green);font-size:.9rem}.elcell.locked{background:var(--mint);border-color:#9fc5b3}.elcell.flash{background:#f5d8d2;border-color:#cc8c80}.frow{min-width:860px;display:grid;grid-template-columns:75px repeat(15,1fr);gap:3px;margin-top:3px}.label{display:grid;place-items:center;font-size:.55rem;color:var(--muted)}.counter{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.counter .metric{text-align:center}.counter button{width:34px;height:34px;border-radius:50%;border:1px solid var(--line);background:#fff;font-weight:950;cursor:pointer;margin:4px}.footer{margin-top:28px;padding:18px 2px;border-top:1px solid rgba(100,120,110,.2);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:.7rem}.footer a{text-decoration:none;margin-left:10px}.familylist{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.listcard{border:1px solid var(--line);background:#fffdf8;border-radius:16px;padding:12px;text-decoration:none;font-size:.78rem}.listcard b{display:block;margin-bottom:3px}.constant{font-size:clamp(2rem,5vw,4.2rem);font-weight:950;color:var(--green);letter-spacing:-.04em;overflow-wrap:anywhere}.notice{border-left:4px solid var(--amber);background:#fff9eb;border-radius:12px;padding:11px 13px;font-size:.8rem;color:#5a5142}.footer nav{display:flex;gap:5px;flex-wrap:wrap}.footer nav a{margin:0}.hidden{display:none!important}
@media(max-width:850px){.hero{grid-template-columns:1fr}.hero-art{display:none}.grid{grid-template-columns:1fr 1fr}.familylist{grid-template-columns:1fr 1fr}.toolgrid{grid-template-columns:1fr}}@media(max-width:540px){.shell{width:min(100% - 18px,1180px)}.grid,.familylist,.metrics,.counter{grid-template-columns:1fr}.nav a:not(.active):not(.lang){display:none}.hero{padding-top:28px}.feature,.gamebox{padding:13px}.comp-row{grid-template-columns:65px 1fr}.comp-row>div:last-child{grid-column:2}.constant{font-size:2rem}}

/* CHEMISTRY TOOLS V2 */
.tool-hub-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.tool-hub-card{border:1px solid var(--line);background:var(--card);border-radius:20px;padding:16px;text-decoration:none;display:grid;grid-template-columns:48px 1fr;gap:12px;align-items:center}.tool-hub-card:hover{border-color:#a8c8b9;transform:translateY(-1px)}.tool-hub-icon{width:48px;height:48px;border-radius:13px;background:var(--mint);display:grid;place-items:center;color:var(--green);font-weight:950;font-size:1.05rem}.tool-hub-card small{display:block;color:var(--green);font-size:.58rem;font-weight:950;text-transform:uppercase;letter-spacing:.09em}.tool-hub-card b{display:block;margin:3px 0;font-size:.93rem}.tool-hub-card span{display:block;color:var(--muted);font-size:.74rem;line-height:1.4}.tool-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:12px}.tool-summary .metric{min-height:80px}.analysis-list{display:grid;gap:8px;margin-top:12px}.analysis-row{display:grid;grid-template-columns:54px 1fr 92px;gap:10px;align-items:center;border:1px solid var(--line);border-radius:15px;background:#fff;padding:9px}.analysis-row .element-chip{width:38px;height:38px}.analysis-row .bar{margin-top:5px}.analysis-row .right{text-align:right;font-size:.75rem;font-weight:850}.select-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}.element-compare{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}.compare-card{border:1px solid #cfe0d7;background:linear-gradient(145deg,var(--mint2),#fff);border-radius:20px;padding:16px}.compare-tile{width:72px;height:78px;border-radius:16px;background:var(--mint);padding:9px;margin-bottom:10px}.compare-tile small{display:block;color:var(--muted);font-size:.6rem}.compare-tile b{display:block;color:var(--green);font-size:2.2rem;line-height:1}.compare-card h3{margin:0 0 7px}.prop-list{display:grid;margin-top:8px}.prop-list div{display:flex;justify-content:space-between;gap:14px;border-bottom:1px solid var(--line);padding:7px 0;font-size:.75rem}.prop-list span{color:var(--muted)}.ptable-controls{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:8px;margin-bottom:12px}.ptable-v2{min-width:900px;display:grid;grid-template-columns:repeat(18,1fr);grid-template-rows:repeat(7,54px);gap:3px}.ptable-v2 .elcell{position:relative;min-width:45px}.ptable-v2 .elcell small{color:var(--muted)}.ptable-v2 .elcell.match{box-shadow:0 0 0 2px var(--amber) inset}.ptable-v2 .elcell.dim{opacity:.16}.fblock{min-width:900px;display:grid;grid-template-columns:75px repeat(15,1fr);gap:3px;margin-top:4px}.fblock .elcell{min-height:50px}.ptable-detail{margin-top:12px;border:1px solid #cfe0d7;background:linear-gradient(145deg,var(--mint2),#fff);border-radius:20px;padding:16px}.ptable-detail-grid{display:grid;grid-template-columns:80px 1fr;gap:14px;align-items:start}.ptable-detail .compare-tile{margin:0}.search-box{display:grid;grid-template-columns:1fr auto;gap:8px}.search-status{min-height:22px;margin-top:8px;color:var(--muted);font-size:.76rem}.compound-results{display:grid;gap:8px;margin-top:12px}.compound-result{border:1px solid var(--line);background:#fff;border-radius:16px;padding:12px;display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center}.compound-result h3{margin:0 0 4px;font-size:.95rem}.compound-result p{margin:0;color:var(--muted);font-size:.74rem;line-height:1.45}.compound-result .formula-label{font-weight:950;color:var(--green);font-size:1.05rem;text-align:right}.compound-result .mini-actions{display:flex;gap:6px;justify-content:flex-end;flex-wrap:wrap;margin-top:6px}.source-note{font-size:.7rem;color:var(--muted);margin-top:10px}.loading-dot:after{content:'…';animation:dots 1.1s steps(4,end) infinite}@keyframes dots{0%,20%{content:''}40%{content:'.'}60%{content:'..'}80%,100%{content:'...'}}
@media(max-width:850px){.tool-hub-grid{grid-template-columns:1fr 1fr}.element-compare{grid-template-columns:1fr}.ptable-controls{grid-template-columns:1fr}.select-row{grid-template-columns:1fr}.search-box{grid-template-columns:1fr}}
@media(max-width:540px){.tool-hub-grid,.tool-summary{grid-template-columns:1fr}.analysis-row{grid-template-columns:50px 1fr}.analysis-row .right{grid-column:2;text-align:left}.compound-result{grid-template-columns:1fr}.compound-result .formula-label{text-align:left}.ptable-detail-grid{grid-template-columns:1fr}}