:root {
  --bg: #050505; --panel: #0d0f14; --panel-2: #12151c; --line: #232834;
  --text: #eef1f7; --muted: #9aa3b5; --accent: #6f9bff;
  --ok: #3ccf8e; --warn: #f2b84b; --bad: #ff6b6b;
  --btn-bg: #eef1f7; --btn-text: #0a0e16;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Space Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--text); font-family: var(--sans); line-height: 1.5; -webkit-font-smoothing: antialiased; }
a { color: var(--accent); }
/* Site-wide offer strip (assets/offer-banner.js); matches the React site banner. */
.offer-bar { position: relative; border-bottom: 1px solid color-mix(in srgb, var(--warn) 30%, transparent); background: var(--panel); font-size: 13px; text-align: center; }
.offer-bar a { display: inline-flex; align-items: center; gap: 8px; padding: 8px 44px; color: var(--text); font-weight: 500; text-decoration: none; }
.offer-bar a:hover { text-decoration: underline; text-underline-offset: 4px; }
.offer-bar .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--warn); flex: none; }
.offer-bar button { position: absolute; right: 10px; top: 50%; transform: translateY(-50%); background: none; border: 0; color: var(--muted); font: inherit; font-size: 20px; line-height: 1; padding: 2px 6px; border-radius: 4px; cursor: pointer; }
.offer-bar button:hover { color: var(--text); background: var(--panel-2); }
.topbar { border-bottom: 1px solid var(--line); }
.topbar .in { max-width: 1040px; margin: 0 auto; padding: 14px 16px; display: flex; align-items: center; gap: 16px; }
.brand { color: var(--text); text-decoration: none; font-weight: 700; letter-spacing: -0.01em; font-size: 17px; }
.brand span { color: var(--muted); font-weight: 500; }
.brand img { display: block; height: 44px; width: auto; }
.topbar nav { margin-left: auto; display: flex; gap: 18px; align-items: center; font-size: 14px; }
.topbar nav a { color: var(--muted); text-decoration: none; }
.topbar nav a:hover { color: var(--text); }
.topbar nav a.cta-sm { color: var(--btn-text); background: var(--btn-bg); padding: 7px 12px; border-radius: 8px; font-weight: 600; }
@media (max-width: 520px) { .topbar nav a.hide-sm { display: none; } }
.wrap { max-width: 1040px; margin: 0 auto; padding: 32px 16px 64px; }
.crumbs { font: 12px var(--mono); color: var(--muted); margin-bottom: 14px; }
.crumbs a { color: var(--muted); }
.eyebrow { display: inline-block; font-family: var(--mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent); background: color-mix(in srgb, var(--accent) 10%, transparent); padding: 4px 10px; border-radius: 6px; }
h1 { font-size: clamp(28px, 5vw, 44px); line-height: 1.1; margin: 14px 0 12px; letter-spacing: -0.02em; }
.lede { color: var(--muted); font-size: 17px; max-width: 700px; margin: 0 0 28px; }
.grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px; }
@media (max-width: 820px) { .grid { grid-template-columns: minmax(0, 1fr); } }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
.card h2 { font-size: 13px; font-family: var(--mono); font-weight: 500; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 0 0 16px; }
.fields { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 14px; }
.fields > div { min-width: 0; }
@media (max-width: 420px) { .fields { grid-template-columns: minmax(0, 1fr); } }
label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.inp { display: flex; align-items: stretch; background: var(--panel-2); border: 1px solid var(--line); border-radius: 8px; }
.inp:focus-within { border-color: var(--accent); }
.inp input, .inp select { flex: 1; min-width: 0; font: 500 15px var(--mono); color: var(--text); background: transparent; border: 0; padding: 10px 12px; outline: none; }
.inp select option { background: var(--panel); }
.inp .u { display: flex; align-items: center; padding: 0 12px; font: 13px var(--mono); color: var(--muted); border-left: 1px solid var(--line); }
.hint { font-size: 12px; color: var(--muted); margin-top: 4px; }
.big { font-family: var(--mono); font-size: clamp(28px, 5.5vw, 44px); font-weight: 600; letter-spacing: -0.02em; line-height: 1.1; word-break: break-word; }
.sub { color: var(--muted); font-size: 14px; margin-top: 6px; }
table { width: 100%; border-collapse: collapse; margin-top: 18px; font-size: 14px; }
td { padding: 8px 0; border-top: 1px solid var(--line); vertical-align: top; }
td:last-child { text-align: right; font-family: var(--mono); padding-left: 12px; }
.verdict { margin-top: 18px; padding: 12px 14px; border-radius: 8px; font-size: 14px; border: 1px solid; }
.verdict b { font-family: var(--mono); letter-spacing: .04em; }
.v-ok { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 40%, transparent); background: color-mix(in srgb, var(--ok) 8%, transparent); }
.v-warn { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 40%, transparent); background: color-mix(in srgb, var(--warn) 8%, transparent); }
.v-bad { color: var(--bad); border-color: color-mix(in srgb, var(--bad) 40%, transparent); background: color-mix(in srgb, var(--bad) 8%, transparent); }
.v-none { color: var(--muted); border-color: var(--line); }
.actions { margin-top: 14px; display: flex; gap: 10px; flex-wrap: wrap; }
.ghost { font: 500 13px var(--sans); color: var(--muted); background: transparent; border: 1px solid var(--line); border-radius: 8px; padding: 7px 12px; cursor: pointer; }
.ghost:hover { color: var(--text); border-color: var(--muted); }
.notes { margin-top: 28px; display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: 20px; }
@media (max-width: 820px) { .notes { grid-template-columns: minmax(0, 1fr); } }
.notes h3 { margin: 0 0 8px; font-size: 18px; }
.notes p, .notes li { color: var(--muted); font-size: 15px; }
.notes ul { padding-left: 18px; margin: 8px 0; }
.formula { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; margin: 12px 0 18px; font: 13px/1.7 var(--mono); color: var(--text); overflow-x: auto; white-space: pre; }
.cta { background: var(--panel-2); }
.btn { display: inline-block; margin-top: 10px; background: var(--btn-bg); color: var(--btn-text); text-decoration: none; font-weight: 600; padding: 10px 16px; border-radius: 8px; }
.related { margin-top: 36px; }
.related h3 { font-size: 18px; margin: 0 0 12px; }
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; }
.tile { display: block; text-decoration: none; color: var(--text); background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; transition: border-color .15s; }
.tile:hover { border-color: var(--accent); }
.tile b { display: block; font-size: 15px; margin-bottom: 4px; }
.tile span { color: var(--muted); font-size: 13px; }
.group-h { font: 12px var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin: 28px 0 12px; }
.disclaimer { margin-top: 28px; font-size: 13px; color: var(--muted); border-top: 1px solid var(--line); padding-top: 16px; }
footer.site { border-top: 1px solid var(--line); }
footer.site .in { max-width: 1040px; margin: 0 auto; padding: 24px 16px 40px; font-size: 13px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 8px 18px; }
footer.site a { color: var(--muted); }