/* Reserve Trace — shared corporate design system
   Brand: light, brass-on-ink, "Reserve Trace" two words, connect-the-dots mark.
   Fonts: Space Grotesk (display), Inter (body), IBM Plex Mono (code/addresses). */

:root {
  --bg: #f6f7f9; --surface: #ffffff; --surface-2: #fbfcfd;
  --ink: #0e1726; --ink-2: #1c2738; --ink-soft: #44505f; --muted: #79859a; --muted-2: #9aa4b4;
  --line: #e7eaef; --line-2: #eef0f4;
  --brass: #a8792a; --brass-dk: #946b22; --brass-soft: #c8a45c; --brass-wash: #faf4e6; --brass-line: #efe2c4;
  --severe: #c5221a; --high: #c4671a; --medium: #9a7515; --clear: #15803d; --info: #1d4ed8;
  --sans: "Inter", system-ui, -apple-system, sans-serif;
  --display: "Space Grotesk", "Inter", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --radius: 14px; --radius-sm: 9px;
  --shadow-sm: 0 1px 2px #0e17260a, 0 8px 24px -12px #0e172614;
  --shadow: 0 10px 30px -18px #0e172626;
  --shadow-lg: 0 24px 60px -28px #0e172940;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: var(--sans); background: var(--bg); color: var(--ink);
  -webkit-font-smoothing: antialiased; font-feature-settings: "tnum" 1; line-height: 1.55; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.wrap-narrow { max-width: 820px; margin: 0 auto; padding: 0 24px; }

/* icons */
.ico { width: 18px; height: 18px; stroke: currentColor; stroke-width: 2; fill: none;
  stroke-linecap: round; stroke-linejoin: round; vertical-align: -3px; }

/* ---------- type / section headers ---------- */
.eyebrow, .sec-eyebrow { font-size: 12.5px; font-weight: 600; letter-spacing: .6px;
  text-transform: uppercase; color: var(--brass); margin: 0; }
.sec-title { font-family: var(--display); font-weight: 600; font-size: 30px; letter-spacing: -.7px; margin: 10px 0 0; }
.sec-intro { font-size: 16px; color: var(--ink-soft); margin: 14px 0 0; max-width: 64ch; line-height: 1.6; }
.center { text-align: center; } .center .sec-intro { margin-left: auto; margin-right: auto; }

/* ---------- buttons ---------- */
.btn { font-family: var(--sans); font-size: 14px; font-weight: 500; border-radius: var(--radius-sm);
  padding: 9px 16px; cursor: pointer; border: 1px solid transparent; display: inline-flex;
  align-items: center; gap: 7px; transition: .15s; white-space: nowrap; }
.btn-dark { background: var(--ink); color: #fff; } .btn-dark:hover { background: var(--ink-2); }
.btn-brass { background: var(--brass); color: #fff; } .btn-brass:hover { background: var(--brass-dk); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--muted-2); background: #fff; }
.btn-lg { padding: 13px 22px; font-size: 15px; }
.signin { font-size: 14px; font-weight: 500; color: var(--ink-soft); } .signin:hover { color: var(--ink); }
.tlink { color: var(--brass); font-weight: 500; display: inline-flex; align-items: center; gap: 6px; }
.tlink:hover { color: var(--brass-dk); } .tlink .ico { width: 15px; height: 15px; }

/* ---------- nav (corporate mega-nav) ---------- */
header.nav { position: sticky; top: 0; z-index: 50; background: #f6f7f9e6;
  backdrop-filter: saturate(160%) blur(10px); border-bottom: 1px solid var(--line); }
.nav-in { display: flex; align-items: center; gap: 26px; height: 64px; }
.brand { display: flex; align-items: center; gap: 11px; }
.brand .mark { width: 30px; height: 30px; }
.brand .name { font-family: var(--display); font-weight: 600; font-size: 18px; letter-spacing: -.3px; }
.nav-links { display: flex; gap: 4px; margin-left: 10px; }
.nav-links > .item { position: relative; }
.nav-links > .item > a { font-size: 14px; color: var(--ink-soft); font-weight: 500;
  padding: 9px 12px; border-radius: 8px; display: inline-flex; align-items: center; gap: 5px; }
.nav-links > .item > a:hover { color: var(--ink); background: #eceff3; }
.nav-links .caret { width: 14px; height: 14px; color: var(--muted); }
.drop { position: absolute; top: 100%; left: 0; padding-top: 10px; opacity: 0; visibility: hidden;
  transform: translateY(4px); transition: .16s; pointer-events: none; }
.item:hover .drop, .item:focus-within .drop { opacity: 1; visibility: visible; transform: none; pointer-events: auto; }
.drop-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow-lg); padding: 10px; min-width: 280px; }
.drop-card.two { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; min-width: 480px; }
.drop a { display: flex; gap: 11px; padding: 10px 11px; border-radius: var(--radius-sm); }
.drop a:hover { background: var(--surface-2); }
.drop .di { width: 30px; height: 30px; border-radius: 8px; background: var(--brass-wash);
  border: 1px solid var(--brass-line); display: flex; align-items: center; justify-content: center;
  color: var(--brass); flex-shrink: 0; } .drop .di .ico { width: 16px; height: 16px; }
.drop .dt { font-size: 13.5px; font-weight: 600; color: var(--ink); }
.drop .dd { font-size: 12px; color: var(--muted); margin-top: 2px; line-height: 1.4; }
.nav-cta { margin-left: auto; display: flex; align-items: center; gap: 14px; }
.menu-btn { display: none; background: none; border: 0; color: var(--ink); padding: 6px; cursor: pointer; }
.menu-btn .ico { width: 24px; height: 24px; }

/* mobile nav panel */
.mnav { display: none; position: fixed; inset: 64px 0 0; z-index: 49; background: var(--bg);
  overflow-y: auto; padding: 16px 24px 40px; border-top: 1px solid var(--line); }
.mnav.open { display: block; }
.mnav .mgroup { border-bottom: 1px solid var(--line); padding: 6px 0; }
.mnav .mgroup > span { display: block; font-size: 12px; font-weight: 600; text-transform: uppercase;
  letter-spacing: .5px; color: var(--brass); padding: 12px 4px 6px; }
.mnav a { display: block; padding: 11px 4px; font-size: 16px; color: var(--ink); font-weight: 500; }
.mnav .mcta { margin-top: 18px; display: flex; flex-direction: column; gap: 10px; }
.mnav .mcta .btn { justify-content: center; }

/* ---------- hero ---------- */
.hero { padding: 76px 0 56px; }
.hero.compact { padding: 56px 0 36px; }
h1 { font-family: var(--display); font-weight: 600; font-size: 52px; line-height: 1.06;
  letter-spacing: -1.6px; margin: 0; max-width: 17ch; }
.hero.compact h1 { font-size: 42px; max-width: 22ch; }
.lede { font-size: 19px; color: var(--ink-soft); margin: 20px 0 0; max-width: 60ch; line-height: 1.6; }
.lede strong { font-weight: 600; color: var(--ink); }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.trustrow { display: flex; flex-wrap: wrap; gap: 14px 24px; margin-top: 20px; color: var(--muted); font-size: 13px; }
.trustrow span { display: inline-flex; align-items: center; gap: 7px; }
.trustrow .ico { width: 15px; height: 15px; color: var(--clear); }

/* breadcrumb */
.crumbs { font-size: 13px; color: var(--muted); padding: 22px 0 0; display: flex; gap: 8px; align-items: center; }
.crumbs a { color: var(--muted); } .crumbs a:hover { color: var(--ink); }
.crumbs .ico { width: 13px; height: 13px; }

/* ---------- sections ---------- */
section.block { padding: 64px 0; }
section.block.tight { padding: 44px 0; }
.band { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.band-wash { background: var(--brass-wash); border-top: 1px solid var(--brass-line); border-bottom: 1px solid var(--brass-line); }

/* stat band (single line) */
.statband { background: var(--ink); color: #fff; }
.statband .wrap { display: flex; align-items: center; gap: 28px; padding: 26px 24px; flex-wrap: wrap; }
.statband .big { font-family: var(--display); font-weight: 600; font-size: 30px; letter-spacing: -.6px; color: var(--brass-soft); }
.statband .txt { color: #c9d3e0; font-size: 15px; max-width: 62ch; }
.statband .txt strong { color: #fff; }

/* stat wall (grid of metrics) */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line);
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.stats .stat { background: var(--surface); padding: 26px 22px; }
.stats .stat .n { font-family: var(--display); font-weight: 600; font-size: 30px; letter-spacing: -.8px; color: var(--ink); }
.stats .stat .l { font-size: 13px; color: var(--muted); margin-top: 6px; line-height: 1.45; }

/* feature / capability cards */
.grid { display: grid; gap: 16px; margin-top: 28px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(228px, 1fr)); }
.feat { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.feat .fi { width: 38px; height: 38px; border-radius: 10px; background: var(--brass-wash);
  border: 1px solid var(--brass-line); display: flex; align-items: center; justify-content: center;
  color: var(--brass); margin-bottom: 16px; } .feat .fi .ico { width: 20px; height: 20px; }
.feat h4, .feat h3 { font-family: var(--display); font-weight: 600; font-size: 16.5px; margin: 0 0 7px; letter-spacing: -.2px; }
.feat p { margin: 0; font-size: 14px; color: var(--ink-soft); line-height: 1.6; }
.feat .feat-link { margin-top: 14px; }
.feat ul { margin: 12px 0 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 8px; }
.feat ul li { font-size: 13.5px; color: var(--ink-soft); display: flex; gap: 8px; align-items: flex-start; }
.feat ul li .ico { width: 15px; height: 15px; color: var(--clear); flex-shrink: 0; margin-top: 2px; }

/* product rows (alternating media/text) */
.prow { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; padding: 30px 0; }
.prow.rev .prow-text { order: 2; }
.prow-text .tag { margin-bottom: 12px; }
.prow-text h3 { font-family: var(--display); font-weight: 600; font-size: 25px; letter-spacing: -.5px; margin: 0; }
.prow-text p { font-size: 15px; color: var(--ink-soft); line-height: 1.65; margin: 14px 0 0; max-width: 50ch; }
.prow-text ul { margin: 18px 0 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 10px; }
.prow-text ul li { font-size: 14px; color: var(--ink-soft); display: flex; gap: 9px; align-items: flex-start; }
.prow-text ul li .ico { width: 16px; height: 16px; color: var(--clear); flex-shrink: 0; margin-top: 2px; }
.prow-media { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow); min-height: 200px; }

/* tags / chips / pills */
.tag { display: inline-block; font-size: 11px; font-weight: 600; letter-spacing: .5px; text-transform: uppercase;
  color: var(--brass); background: var(--brass-wash); border: 1px solid var(--brass-line); padding: 3px 9px; border-radius: 6px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.chip { font-size: 12px; font-weight: 500; color: var(--ink-soft); background: var(--surface);
  border: 1px solid var(--line); border-radius: 999px; padding: 5px 12px; }
.pill { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 600;
  color: var(--clear); background: #e9f3ec; border: 1px solid #cfe6d6; padding: 4px 10px; border-radius: 999px; }

/* tables */
.tbl-wrap { margin-top: 26px; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--surface); }
table.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
table.tbl th { text-align: left; font-size: 12px; font-weight: 600; letter-spacing: .4px; text-transform: uppercase;
  color: var(--muted); background: var(--surface-2); padding: 13px 18px; border-bottom: 1px solid var(--line); }
table.tbl td { padding: 14px 18px; border-bottom: 1px solid var(--line-2); color: var(--ink-soft); vertical-align: top; }
table.tbl tr:last-child td { border-bottom: 0; }
table.tbl td strong, table.tbl td b { color: var(--ink); font-weight: 600; }
table.tbl .yes { color: var(--clear); font-weight: 600; } table.tbl .no { color: var(--muted-2); }

/* comparison table (us vs them) */
.cmp th.us, .cmp td.us { background: var(--brass-wash); }
.cmp th.us { color: var(--brass); }

/* coverage chips */
.chains { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.chains .chain { display: inline-flex; align-items: center; gap: 9px; font-size: 14px; font-weight: 500;
  color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 999px; padding: 8px 16px; }
.chains .chain .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--brass-soft); }

/* code */
pre.code { margin: 0; background: #0e1726; border-radius: 14px; padding: 20px 22px; font-family: var(--mono);
  font-size: 12.5px; line-height: 1.75; color: #c9d3e0; overflow-x: auto; box-shadow: 0 18px 44px -22px #0e172966; }
pre.code .cmt { color: #6b7688; } pre.code .pr { color: #c8a45c; } pre.code .ky { color: #e2c88a; }
pre.code .st { color: #8fbf94; } pre.code .nu { color: #e8a87c; }

/* callout / note */
.note { display: flex; gap: 16px; background: var(--brass-wash); border: 1px solid var(--brass-line);
  border-radius: var(--radius); padding: 20px 24px; margin-top: 24px; }
.note .ni { width: 40px; height: 40px; border-radius: 11px; background: #fff; border: 1px solid var(--brass-line);
  display: flex; align-items: center; justify-content: center; color: var(--brass); flex-shrink: 0; }
.note .ni .ico { width: 20px; height: 20px; }
.note h4 { font-family: var(--display); font-weight: 600; font-size: 16px; margin: 0 0 6px; }
.note p { margin: 0; font-size: 14px; color: var(--ink-soft); line-height: 1.6; } .note p strong { color: var(--ink); }

/* CTA band */
.cta-band { background: var(--ink); color: #fff; }
.cta-band .wrap { padding: 60px 24px; text-align: center; }
.cta-band .sec-eyebrow { color: var(--brass-soft); }
.cta-band h2 { font-family: var(--display); font-weight: 600; font-size: 34px; letter-spacing: -1px; margin: 10px 0 0; }
.cta-band p { color: #c9d3e0; font-size: 16px; margin: 14px auto 0; max-width: 56ch; line-height: 1.6; }
.cta-band .hero-cta { justify-content: center; }

/* glossary */
.gloss { margin-top: 26px; display: grid; gap: 14px; }
.gterm { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px; }
.gterm h3 { font-family: var(--display); font-weight: 600; font-size: 18px; margin: 0; letter-spacing: -.3px; }
.gterm p { font-size: 14px; color: var(--ink-soft); line-height: 1.62; margin: 9px 0 0; }

/* FAQ */
.faq { max-width: 820px; margin-top: 26px; }
details.q { border-bottom: 1px solid var(--line); padding: 4px 0; }
details.q summary { list-style: none; cursor: pointer; padding: 18px 4px; font-family: var(--display);
  font-weight: 500; font-size: 17px; letter-spacing: -.2px; display: flex; align-items: center;
  justify-content: space-between; gap: 16px; }
details.q summary::-webkit-details-marker { display: none; }
details.q summary .chev { width: 18px; height: 18px; color: var(--muted); transition: transform .2s; flex-shrink: 0; }
details.q[open] summary .chev { transform: rotate(180deg); }
details.q .a { padding: 0 4px 20px; font-size: 14.5px; color: var(--ink-soft); line-height: 1.65; max-width: 72ch; }

/* register form (shared) */
.register { background: var(--ink); color: #fff; }
.register .wrap { padding: 64px 24px; }
.register .sec-eyebrow { color: var(--brass-soft); } .register .sec-title { color: #fff; }
.register .intro { color: #c9d3e0; font-size: 16px; margin: 12px 0 30px; max-width: 56ch; line-height: 1.6; }
.reg-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: start; }
.form-card { background: var(--surface); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow-lg); }
.field { margin-bottom: 14px; } .field.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.field label { display: block; font-size: 12.5px; font-weight: 600; color: var(--ink); margin-bottom: 6px; }
.field input, .field select, .field textarea { width: 100%; font-family: var(--sans); font-size: 14px;
  color: var(--ink); background: #fff; border: 1px solid var(--line); border-radius: 9px; padding: 10px 12px; outline: 0; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: #d8c79a; box-shadow: 0 0 0 4px #c8a45c1f; }
.field textarea { resize: vertical; min-height: 70px; }
.hp { position: absolute; left: -9999px; }
.reg-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 16px; }
.reg-list li { display: flex; gap: 12px; color: #c9d3e0; font-size: 14.5px; line-height: 1.5; }
.reg-list .ico { width: 20px; height: 20px; color: var(--brass-soft); flex-shrink: 0; margin-top: 1px; }
.reg-list strong { color: #fff; font-weight: 600; }
.form-ok { display: none; text-align: center; padding: 20px; }
.form-ok .ico { width: 40px; height: 40px; color: var(--clear); }
.form-ok h4 { font-family: var(--display); font-size: 20px; margin: 12px 0 6px; color: var(--ink); }
.form-ok p { color: var(--ink-soft); font-size: 14px; margin: 0; }

/* ---------- footer (corporate, dark, columned) ---------- */
footer.site { background: var(--ink); color: #aeb9c8; }
footer.site .wrap { padding: 56px 24px 30px; }
.foot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 36px; }
.foot-brand .name { font-family: var(--display); font-weight: 600; color: #fff; font-size: 17px; }
.foot-brand .mark path[stroke="#0e1726"], .foot-brand .mark circle[fill="#0e1726"] { stroke: #fff; fill: #fff; }
.foot-brand p { font-size: 13.5px; color: #8995a6; margin: 14px 0 0; max-width: 34ch; line-height: 1.6; }
.foot-col h5 { font-size: 12px; font-weight: 600; letter-spacing: .5px; text-transform: uppercase; color: #fff; margin: 0 0 14px; }
.foot-col a { display: block; font-size: 14px; color: #aeb9c8; padding: 6px 0; } .foot-col a:hover { color: #fff; }
.foot-bottom { border-top: 1px solid #243044; margin-top: 40px; padding-top: 22px; display: flex;
  flex-wrap: wrap; gap: 10px 24px; align-items: center; font-size: 12.5px; color: #8995a6; }
.foot-bottom .sep { margin-left: auto; }
.foot-brand .brand-row { display: flex; align-items: center; gap: 10px; }

/* severity (screening demo + risk pills) */
.lv-severe { background: #fbeae9; color: var(--severe); } .sc-severe { color: var(--severe); }
.lv-high { background: #fbeede; color: var(--high); } .sc-high { color: var(--high); }
.lv-medium { background: #f7f0d9; color: var(--medium); } .sc-medium { color: var(--medium); }
.lv-low, .lv-none { background: #e9f3ec; color: var(--clear); } .sc-low, .sc-none { color: var(--clear); }

/* ---------- responsive ---------- */
@media (max-width: 920px) {
  .foot-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 820px) {
  h1 { font-size: 38px; } .hero.compact h1 { font-size: 32px; }
  .nav-links { display: none; } .menu-btn { display: inline-flex; }
  .nav-cta .signin, .nav-cta .btn:not(.menu-cta) { display: none; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .prow { grid-template-columns: 1fr; gap: 24px; } .prow.rev .prow-text { order: 0; }
  .reg-grid { grid-template-columns: 1fr; gap: 26px; }
  .lede { font-size: 17px; } .field.row { grid-template-columns: 1fr; }
  .sec-title { font-size: 26px; } .cta-band h2 { font-size: 27px; }
}
@media (max-width: 560px) {
  .stats { grid-template-columns: 1fr 1fr; } .foot-grid { grid-template-columns: 1fr; }
}