:root{color-scheme:dark;--bg:#06131c;--panel:#0c202c;--line:#203b49;--text:#ecf5f7;--muted:#a6bdc7;--accent:#66dfc3}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 system-ui,-apple-system,Segoe UI,sans-serif}a{color:inherit;text-decoration:none}header,main,footer{max-width:1320px;margin:auto}header{padding:28px 40px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}.brand{font-weight:850;letter-spacing:-1px;font-size:23px}.brand span{font-weight:400;color:var(--accent);margin-left:3px}nav{display:flex;gap:32px;font-size:14px}nav a:hover{color:var(--accent)}main{padding:0 40px}section{padding:66px 0}.hero{display:grid;grid-template-columns:1.15fr 1fr;gap:55px;align-items:center;min-height:580px}.eyebrow{text-transform:uppercase;letter-spacing:2.4px;font-size:11px;font-weight:700;color:var(--accent)}h1{font-size:clamp(40px,5.5vw,72px);letter-spacing:-3px;line-height:1.07;margin:25px 0}h1 span{color:var(--accent)}.intro{color:var(--muted);font-size:19px;max-width:440px}.button,button{display:inline-flex;gap:35px;align-items:center;background:var(--accent);color:#061b19;padding:14px 24px;border:0;border-radius:6px;font-weight:750;font-size:14px;cursor:pointer;margin-top:20px}.button:hover,button:hover{background:#98f6df}.terrain{height:360px;position:relative;overflow:hidden;border:1px solid #284550;border-radius:28px;background:radial-gradient(ellipse at 50% 60%,#15423f,transparent 70%),repeating-linear-gradient(0deg,transparent,transparent 29px,#173746 30px),repeating-linear-gradient(90deg,transparent,transparent 29px,#173746 30px);transform:perspective(700px) rotateY(-8deg)}.orbit{position:absolute;border:1px solid #508076;border-radius:50%;width:320px;height:270px;top:45px;left:25px;transform:rotate(-25deg);box-shadow:0 0 0 30px #6bdfc310,0 0 0 60px #6bdfc308}.river{position:absolute;width:95px;height:470px;left:48%;top:-50px;border-left:10px solid #70e8d0;border-radius:50%;transform:rotate(24deg);filter:drop-shadow(0 0 10px #4bcdb8)}.point{position:absolute;width:12px;height:12px;background:var(--accent);border-radius:100%;box-shadow:0 0 0 9px #66dfc31a}.p1{top:90px;left:40%}.p2{top:230px;left:20%}.p3{top:200px;left:80%}h2{font-size:34px;letter-spacing:-1px;line-height:1.2;margin:15px 0 30px}h3{font-size:22px;margin:20px 0 10px}.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}article{padding:25px;background:var(--panel);border:1px solid var(--line);border-radius:10px}article p,.section-top>p{font-size:14px;color:var(--muted)}.number{color:var(--accent);font-size:12px}.section-top{display:flex;align-items:center;justify-content:space-between;gap:25px}.section-top>p{max-width:290px}.demo-shell{background:var(--panel);border:1px solid var(--line);border-radius:12px;display:grid;grid-template-columns:1fr 1.5fr;min-height:240px}.demo-controls{padding:30px;border-right:1px solid var(--line)}label{display:block;font-size:14px;color:var(--muted)}input,select{display:block;background:#061722;color:var(--text);border:1px solid #365360;border-radius:5px;padding:13px;font:inherit;width:100%;margin-top:9px}#demo-result{padding:28px;color:var(--muted)}.result-row{display:flex;justify-content:space-between;gap:20px;padding:9px 0;border-bottom:1px solid var(--line)}.result-row strong{color:var(--accent)}footer{display:flex;justify-content:space-between;gap:20px;padding:35px 40px;border-top:1px solid var(--line)}footer p{font-size:12px;color:var(--muted)}.access{max-width:480px;margin:auto;min-height:65vh}.access label{margin:20px 0}button:disabled{opacity:.6;cursor:wait}:focus-visible{outline:3px solid #eefefa;outline-offset:4px}@media(max-width:760px){header,footer{padding:22px}main{padding:0 22px}nav{gap:14px;font-size:12px}.hero{grid-template-columns:1fr;gap:20px;min-height:auto}.terrain{height:230px;transform:none}section{padding:40px 0}.grid{grid-template-columns:1fr 1fr}.section-top,footer{display:block}.demo-shell{grid-template-columns:1fr}.demo-controls{border-right:0;border-bottom:1px solid var(--line)}h1{letter-spacing:-2px}}@media(max-width:430px){.grid{grid-template-columns:1fr}nav a:last-child{display:none}}

.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.tool-card{display:flex;flex-direction:column;min-height:240px}.tool-card[hidden]{display:none}.tool-card h3{margin:16px 0 8px}.tool-card p{flex:1}.badge{color:var(--accent);font-size:11px;letter-spacing:.5px}.tool-link{display:flex;justify-content:space-between;align-items:center;color:var(--accent);font-size:14px;font-weight:700;margin-top:20px;padding-top:15px;border-top:1px solid var(--line)}.tool-card:hover{border-color:#508c82}.tool-filters{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 24px}.filter{margin:0;background:transparent;color:var(--muted);border:1px solid var(--line);padding:9px 17px;border-radius:30px}.filter.active{background:var(--accent);color:var(--bg)}.filter:hover{color:var(--bg)}.protected .badge{color:var(--muted)}.tool-page h1{font-size:clamp(32px,4.3vw,56px);letter-spacing:-1.8px}.back-link{font-size:13px;color:var(--muted)}.calculator-shell{display:grid;grid-template-columns:1fr 1fr;gap:35px;margin-top:35px;background:var(--panel);border:1px solid var(--line);padding:35px;border-radius:14px}.calculator-shell h2{font-size:24px}.calculator-shell label{margin-top:20px}.unit{float:right;color:var(--accent)}.calculator-shell input{margin-top:7px}.tool-output{padding:15px 0 15px 30px;border-left:1px solid var(--line)}.tool-note{font-size:12px;color:var(--muted);margin-top:28px}.form-actions{display:flex;gap:10px}.secondary{background:transparent;color:var(--muted);border:1px solid var(--line)}#tool-result .result-row{align-items:center}#tool-result strong{text-align:right;max-width:65%;overflow-wrap:anywhere}.tool-error{color:#ffb7a6}body{overflow-wrap:break-word}@media(max-width:900px){.tool-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:600px){.tool-grid,.calculator-shell{grid-template-columns:1fr}.calculator-shell{padding:22px;gap:20px}.tool-output{border-left:0;border-top:1px solid var(--line);padding:24px 0 0}.form-actions{flex-wrap:wrap}.tool-card{min-height:210px}}