/* Iterate Analytics — institutional dark. Layout: left-aligned editorial grid, hairline-separated sections, one gold accent. */
:root {
  color-scheme: dark;
  --bg: #0a121d;
  --bg-2: #0f1a28;
  --bg-3: #142233;
  --line: #1f2d40;
  --fg: #e8ebf0;
  --muted: #9ca8b8;
  --gold: #d8a93a;
  --gold-soft: rgba(216, 169, 58, 0.12);
  --display: "Spectral", Georgia, "Times New Roman", serif;
  --body: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --max: 1160px;
  --gutter: clamp(16px, 4vw, 40px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; animation: none !important; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.wrap { max-width: var(--max); margin-inline: auto; padding-inline: var(--gutter); }

h1, h2, h3 { font-family: var(--display); font-weight: 400; line-height: 1.15; text-wrap: balance; margin: 0; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.3rem, 5.2vw, 3.9rem); font-weight: 300; }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); font-weight: 300; }
h3 { font-size: 1.35rem; font-weight: 500; }
p { margin: 0; }
.lede { font-size: clamp(1.05rem, 1.6vw, 1.2rem); color: var(--muted); max-width: 62ch; }
.eyebrow {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
}
.muted { color: var(--muted); }
.prose { max-width: 66ch; display: grid; gap: 1.1rem; }
.prose h2 { font-size: 1.7rem; margin-top: 1.4rem; }
.prose h3 { margin-top: 0.8rem; }
.prose ul { margin: 0; padding-left: 1.2rem; display: grid; gap: 0.4rem; }

/* Header */
.site-header {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 20;
  background: rgba(10, 18, 29, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; padding-block: 14px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand svg { width: 38px; height: 38px; flex: none; }
.brand-name { font-family: var(--display); font-size: 1.25rem; letter-spacing: 0.02em; line-height: 1.1; }
.brand-tag { display: block; font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); }
.nav-links { display: flex; gap: 1.6rem; list-style: none; margin: 0; padding: 0; align-items: center; }
.nav-links a { text-decoration: none; font-size: 0.93rem; color: var(--muted); transition: color 0.15s; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--fg); }
.nav-links a[aria-current="page"] { box-shadow: inset 0 -1px 0 var(--gold); padding-bottom: 2px; }
.nav-toggle { display: none; background: none; border: 1px solid var(--line); color: var(--fg); padding: 8px 12px; font: inherit; font-size: 0.85rem; cursor: pointer; border-radius: 2px; }

.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 12px 22px;
  font-family: var(--body); font-size: 0.95rem; font-weight: 500;
  text-decoration: none; border-radius: 2px; cursor: pointer;
  border: 1px solid var(--gold); background: var(--gold); color: #0a121d;
  transition: background 0.15s, color 0.15s;
}
.btn:hover { background: transparent; color: var(--gold); }
.btn-ghost { background: transparent; color: var(--fg); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--gold); color: var(--gold); }
.nav-links .btn { color: #0a121d; padding: 8px 16px; font-size: 0.88rem; }
.nav-links .btn:hover { color: var(--gold); }

.text-link { color: var(--gold); text-decoration: none; font-size: 0.95rem; }
.text-link:hover { text-decoration: underline; }
.risk-band { background: var(--bg-2); }
.risk-list li span:first-child { font-family: var(--display); font-size: 1.15rem; }
.method-table td:first-child { font-weight: 500; min-width: 180px; }
.method-table td { vertical-align: top; }
.method-table .muted { font-weight: 400; font-size: 0.82rem; }

@media (max-width: 1040px) {
  .nav-toggle { display: inline-block; }
  .nav-links {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: var(--bg-2); border-bottom: 1px solid var(--line);
    padding: 8px var(--gutter) 20px;
  }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: 12px 0; font-size: 1rem; }
  .nav-links .btn { display: inline-flex; margin-top: 10px; padding: 10px 18px; }
}

/* Sections */
section { padding-block: clamp(56px, 8vw, 104px); border-bottom: 1px solid var(--line); }
.section-head { display: grid; gap: 0.9rem; margin-bottom: clamp(32px, 5vw, 56px); max-width: 760px; }

/* Hero */
.hero { padding-block: clamp(56px, 8vw, 96px); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 72px); align-items: center; }
.hero-text { display: grid; gap: 1.5rem; min-width: 0; }
.hero-text h1 em { font-style: italic; color: var(--gold); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 0.4rem; }
.hero-figure { margin: 0; min-width: 0; }
.hero-figure figcaption { font-family: var(--mono); font-size: 0.72rem; color: var(--muted); letter-spacing: 0.06em; margin-top: 10px; }
.regime { width: 100%; height: auto; display: block; background: var(--bg-2); border: 1px solid var(--line); }
@media (max-width: 880px) { .hero-grid { grid-template-columns: 1fr; } }

.facts { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--line); margin-top: clamp(40px, 6vw, 72px); }
.fact { padding: 22px 20px 0 0; display: grid; gap: 4px; min-width: 0; }
.fact + .fact { padding-left: 20px; border-left: 1px solid var(--line); }
.fact b { font-family: var(--display); font-weight: 400; font-size: 1.7rem; color: var(--fg); }
.fact span { font-size: 0.85rem; color: var(--muted); }
@media (max-width: 720px) {
  .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .fact:nth-child(3) { padding-left: 0; border-left: 0; }
}

/* Service grid */
.svc-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.svc { padding: 28px 26px 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); display: grid; gap: 0.7rem; align-content: start; min-width: 0; text-decoration: none; transition: background 0.2s; }
a.svc:hover { background: var(--bg-2); }
a.svc:hover h3 { color: var(--gold); }
.svc .code { font-family: var(--mono); font-size: 0.72rem; color: var(--gold); letter-spacing: 0.1em; }
.svc p { color: var(--muted); font-size: 0.95rem; }
@media (max-width: 960px) { .svc-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .svc-grid { grid-template-columns: 1fr; } }

/* Two-col split */
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); gap: clamp(32px, 6vw, 88px); align-items: start; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }

.client-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.client-list li { display: flex; justify-content: space-between; gap: 1rem; padding: 16px 0; border-bottom: 1px solid var(--line); }
.client-list li span:last-child { color: var(--muted); font-size: 0.9rem; text-align: right; }
.not-served { margin-top: 18px; font-size: 0.9rem; color: var(--muted); }

/* Steps */
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; border-top: 1px solid var(--line); counter-reset: step; }
.steps li { display: grid; grid-template-columns: 64px minmax(0, 1fr); gap: 1rem; padding: 24px 0; border-bottom: 1px solid var(--line); counter-increment: step; }
.steps li::before { content: counter(step, decimal-leading-zero); font-family: var(--mono); color: var(--gold); font-size: 0.85rem; padding-top: 6px; }
.steps h3 { margin-bottom: 6px; }
.steps p { color: var(--muted); }

/* Insight cards */
.ins-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.ins { display: grid; gap: 0.8rem; align-content: start; padding: 26px; background: var(--bg-2); border: 1px solid var(--line); text-decoration: none; transition: border-color 0.2s; min-width: 0; }
.ins:hover { border-color: var(--gold); }
.ins .meta { font-family: var(--mono); font-size: 0.72rem; color: var(--muted); letter-spacing: 0.06em; display: flex; gap: 10px; flex-wrap: wrap; }
.ins .meta .tag { color: var(--gold); }
.ins p { color: var(--muted); font-size: 0.95rem; }
.ins .more { font-size: 0.88rem; color: var(--gold); }
@media (max-width: 960px) { .ins-grid { grid-template-columns: 1fr; } }

/* Service detail */
.svc-detail { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.6fr); gap: clamp(28px, 5vw, 72px); padding-block: 48px; border-top: 1px solid var(--line); scroll-margin-top: 90px; }
.svc-detail:first-of-type { border-top: 0; padding-top: 0; }
.svc-detail .head { display: grid; gap: 0.7rem; align-content: start; }
.svc-detail .body { display: grid; gap: 1.2rem; min-width: 0; }
.deliver { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 28px; list-style: none; margin: 0; padding: 0; }
.deliver li { padding: 10px 0 10px 18px; border-bottom: 1px solid var(--line); position: relative; font-size: 0.95rem; }
.deliver li::before { content: ""; position: absolute; left: 0; top: 19px; width: 8px; height: 1px; background: var(--gold); }
@media (max-width: 860px) { .svc-detail { grid-template-columns: 1fr; } }
@media (max-width: 560px) { .deliver { grid-template-columns: 1fr; } }

.models { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.model { border-top: 2px solid var(--gold); padding-top: 18px; display: grid; gap: 0.6rem; align-content: start; min-width: 0; }
.model p { color: var(--muted); font-size: 0.95rem; }
@media (max-width: 860px) { .models { grid-template-columns: 1fr; } }

.principles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 36px 48px; }
.principles div { display: grid; gap: 0.5rem; align-content: start; min-width: 0; }
.principles p { color: var(--muted); }
@media (max-width: 720px) { .principles { grid-template-columns: 1fr; } }

/* Notice / disclaimer */
.notice { border: 1px solid var(--gold); background: var(--gold-soft); padding: 22px 24px; display: grid; gap: 0.5rem; max-width: 820px; }
.notice strong { font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--gold); font-weight: 500; }
.notice p { font-size: 0.95rem; }

/* Tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); }
table { border-collapse: collapse; width: 100%; font-size: 0.92rem; min-width: 560px; }
th, td { padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--line); }
th { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); font-weight: 500; background: var(--bg-2); }
td.pos { color: #7cc59a; }
td.neg { color: #e08a7c; }
td.neu { color: var(--muted); }
tr:last-child td { border-bottom: 0; }

/* Article */
.article-head { display: grid; gap: 1.1rem; max-width: 820px; }
.article-meta { font-family: var(--mono); font-size: 0.78rem; color: var(--muted); display: flex; flex-wrap: wrap; gap: 14px; }
.sample-flag { display: inline-block; font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase; padding: 4px 10px; border: 1px solid var(--gold); color: var(--gold); justify-self: start; }
.article-body { display: grid; gap: 2rem; }
.back { font-size: 0.9rem; color: var(--muted); text-decoration: none; }
.back:hover { color: var(--gold); }
.callout { border-left: 2px solid var(--gold); padding: 4px 0 4px 20px; font-family: var(--display); font-size: 1.3rem; line-height: 1.4; max-width: 60ch; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: clamp(32px, 6vw, 80px); align-items: start; }
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; } }
form { display: grid; gap: 18px; }
.row2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
@media (max-width: 560px) { .row2 { grid-template-columns: 1fr; } }
label { display: grid; gap: 6px; font-size: 0.85rem; color: var(--muted); }
input, select, textarea {
  font: inherit; font-size: 1rem; color: var(--fg);
  background: var(--bg-2); border: 1px solid var(--line); border-radius: 2px;
  padding: 12px 14px; width: 100%;
}
textarea { min-height: 140px; resize: vertical; }
input:focus, select:focus, textarea:focus { border-color: var(--gold); }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 0.88rem; }
.check input { width: auto; margin-top: 4px; accent-color: var(--gold); }
.form-status { font-size: 0.92rem; padding: 12px 14px; border: 1px solid var(--line); background: var(--bg-3); }
.side-block { display: grid; gap: 0.5rem; padding-bottom: 24px; margin-bottom: 24px; border-bottom: 1px solid var(--line); }
.email-line { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.email-line code { font-family: var(--mono); font-size: 0.98rem; color: var(--fg); user-select: all; word-break: break-all; }
.copy-btn { background: none; border: 1px solid var(--line); color: var(--muted); font: inherit; font-size: 0.78rem; padding: 4px 10px; cursor: pointer; border-radius: 2px; }
.copy-btn:hover { color: var(--gold); border-color: var(--gold); }

/* CTA band */
.cta-band { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 24px; }
.cta-band h2 { max-width: 20ch; }

/* Footer */
.site-footer { padding-block: 56px 40px; background: var(--bg); }
.foot-grid { display: grid; grid-template-columns: minmax(0, 1.3fr) repeat(2, minmax(0, 0.7fr)); gap: 40px; padding-bottom: 36px; border-bottom: 1px solid var(--line); }
.foot-grid h4 { margin: 0 0 12px; font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); font-weight: 500; }
.foot-grid ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.foot-grid a { text-decoration: none; color: var(--fg); font-size: 0.93rem; }
.foot-grid a:hover { color: var(--gold); }
.foot-legal { padding-top: 24px; display: grid; gap: 10px; font-size: 0.8rem; color: var(--muted); max-width: 900px; }
.foot-legal strong { color: var(--fg); font-weight: 500; }
@media (max-width: 760px) { .foot-grid { grid-template-columns: 1fr 1fr; } .foot-grid > :first-child { grid-column: 1 / -1; } }

.page-head { padding-block: clamp(56px, 8vw, 96px) clamp(40px, 5vw, 64px); }
.page-head .wrap { display: grid; gap: 1.1rem; }