:root{--ink: #10161c;--ink-2: #1b242d;--paper: #f2f4f3;--paper-2: #ffffff;--line: #ccd3d6;--line-strong: #9aa6ac;--muted: #5c6a72;--gas-o2: #f7f7f7;--gas-o2-edge: #2b2b2b;--gas-air: #0f6ab0;--gas-vac: #f2c200;--gas-n2o: #1f7ab8;--gas-agss: #6d3f9e;--accent: #0f6ab0;--danger: #b3261e;--ok: #1f7a3f;--font-sans: "IBM Plex Sans", system-ui, sans-serif;--font-mono: "IBM Plex Mono", ui-monospace, monospace;--r: 2px}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font-sans);font-size:14px;line-height:1.5}.shell{display:grid;grid-template-columns:6px 220px 1fr;min-height:100vh}.gas-rail{background:linear-gradient(to bottom,var(--gas-o2) 0 25%,var(--gas-air) 25% 50%,var(--gas-vac) 50% 75%,var(--gas-n2o) 75% 100%);border-right:1px solid var(--gas-o2-edge)}.sidebar{background:var(--ink);color:#dfe6ea;padding:20px 0}.brand{padding:0 18px 20px;border-bottom:1px solid #2a343d}.brand b{display:block;font-size:13px;letter-spacing:.14em;text-transform:uppercase}.brand span{font-family:var(--font-mono);font-size:11px;color:#7d8d97}.nav{padding-top:12px}.nav a{display:flex;justify-content:space-between;gap:10px;padding:9px 18px;color:#b9c5cc;text-decoration:none;font-size:13px;border-left:3px solid transparent}.nav a:hover{background:var(--ink-2);color:#fff}.nav a.active{background:var(--ink-2);color:#fff;border-left-color:var(--gas-air)}.nav a .idx{font-family:var(--font-mono);font-size:11px;color:#6f7f89}.nav a[aria-disabled=true]{opacity:.42;pointer-events:none}.main{padding:26px 32px 60px;max-width:1180px}.page-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:22px}h1{font-size:20px;font-weight:600;margin:0;letter-spacing:-.01em}h2{font-size:14px;font-weight:600;margin:0 0 12px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted)}.sub{color:var(--muted);font-size:13px;margin:4px 0 0}.card{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r);padding:18px}.grid-2{display:grid;grid-template-columns:minmax(280px,380px) 1fr;gap:20px;align-items:start}label{display:block;font-size:12px;color:var(--muted);margin-bottom:4px}input,select{width:100%;padding:8px 10px;font:inherit;font-family:var(--font-mono);border:1px solid var(--line-strong);border-radius:var(--r);background:#fff;color:var(--ink)}input:focus-visible,select:focus-visible,button:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.field{margin-bottom:12px}.field-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}button{font:inherit;font-weight:500;padding:9px 16px;cursor:pointer;border:1px solid var(--ink);border-radius:var(--r);background:var(--ink);color:#fff}button:hover{background:var(--ink-2)}button:disabled{opacity:.5;cursor:not-allowed}button.ghost{background:transparent;color:var(--ink);border-color:var(--line-strong)}button.ghost:hover{background:#e7ebec}table{width:100%;border-collapse:collapse;font-size:13px}th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line)}th{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:600}td.num,th.num{text-align:right;font-family:var(--font-mono)}tbody tr:hover{background:#f6f8f8}.result{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}.result div{background:#fff;padding:12px 14px}.result dt{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.07em;margin:0}.result dd{margin:3px 0 0;font-family:var(--font-mono);font-size:18px;font-weight:500}.result .headline dd{color:var(--accent);font-size:22px}.tag{display:inline-block;padding:2px 7px;border:1px solid var(--line-strong);border-radius:999px;font-family:var(--font-mono);font-size:11px;color:var(--muted)}.assumptions{margin-top:16px}.assumptions summary{cursor:pointer;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}.assumptions pre{font-family:var(--font-mono);font-size:12px;background:#f6f8f8;border:1px solid var(--line);padding:12px;overflow-x:auto;margin-top:10px}.notice{border-left:3px solid var(--gas-vac);background:#fdf7e0;padding:10px 12px;font-size:12.5px;margin-top:16px}.error{border-left:3px solid var(--danger);background:#fdecea;padding:10px 12px;font-size:13px;margin-bottom:14px}.empty{border:1px dashed var(--line-strong);padding:32px;text-align:center;color:var(--muted)}.login{min-height:100vh;display:grid;place-items:center;padding:20px}.login .card{width:100%;max-width:380px}.login .brand-mark{border-left:4px solid var(--gas-air);padding-left:12px;margin-bottom:22px}.login .brand-mark b{display:block;font-size:15px}.login .brand-mark span{font-family:var(--font-mono);font-size:11px;color:var(--muted)}@media(max-width:860px){.shell{grid-template-columns:6px 1fr}.sidebar{display:none}.grid-2{grid-template-columns:1fr}.main{padding:20px 16px 48px}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}.page-img{max-width:100%;height:auto;border:1px solid var(--line);background:#fff}.main a{color:var(--accent)}