/* ==========================================================================
   Decision Insight Partners — "Signal" design system
   Palette: cool light ground, cobalt accent, ink navy. Type: Archivo (display),
   Source Serif 4 (body), IBM Plex Mono (data, labels, figures).
   ========================================================================== */

:root {
  --bg: #F4F7F9;
  --card: #FFFFFF;
  --ink: #15212D;
  --ink-2: #2A3B4D;
  --muted: #53667B;
  --line: #DCE4EC;
  --blue: #1C5DBC;
  --blue-deep: #14488F;
  --blue-tint: #E4EDF9;
  --blue-chart: #C7D8F0;
  --wash: #EDF2F6;
  --good: #1E7A46;
  --dark: #14202C;
  --dark-ink: #E9EFF5;
  --dark-muted: #9FB2C6;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(18, 35, 54, 0.07), 0 6px 20px rgba(18, 35, 54, 0.05);
  --font-display: "Archivo", "Avenir Next", "Segoe UI", system-ui, sans-serif;
  --font-body: "Source Serif 4", Charter, Georgia, serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0 0 0.5em;
  text-wrap: balance;
}
h1 { font-size: clamp(2.1rem, 5vw, 3.3rem); font-weight: 700; }
h2 { font-size: clamp(1.55rem, 3.2vw, 2.15rem); font-weight: 700; }
h3 { font-size: 1.22rem; font-weight: 600; letter-spacing: -0.01em; }
p { margin: 0 0 1.1em; }
a { color: var(--blue); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--blue-deep); }

:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; border-radius: 2px; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 760px; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--blue);
  margin: 0 0 14px;
}

.lede { font-size: 1.18rem; color: var(--muted); max-width: 62ch; }

/* ---------- Navigation ---------- */

.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: 1080px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  height: 68px; gap: 16px;
}
.brand {
  display: flex; align-items: center; gap: 11px;
  text-decoration: none; color: var(--ink);
}
.brand svg { flex-shrink: 0; }
.brand-name {
  font-family: var(--font-display);
  font-weight: 700; font-size: 1.02rem; letter-spacing: -0.01em;
  line-height: 1.1;
}
.nav-links { display: flex; align-items: center; gap: 26px; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  font-family: var(--font-display);
  font-size: 0.92rem; font-weight: 500;
  color: var(--ink-2); text-decoration: none;
}
.nav-links a:hover { color: var(--blue); }
.nav-links a[aria-current="page"] { color: var(--blue); font-weight: 600; }
.nav-toggle { display: none; }

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 600; font-size: 0.95rem;
  padding: 12px 22px;
  border-radius: 6px;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn-primary { background: var(--blue); color: #FFFFFF; }
.btn-primary:hover { background: var(--blue-deep); color: #FFFFFF; }
.btn-secondary { border-color: var(--line); color: var(--ink); background: var(--card); }
.btn-secondary:hover { border-color: var(--blue); color: var(--blue); }
.btn-light { background: #FFFFFF; color: var(--dark); }
.btn-light:hover { background: var(--blue-tint); color: var(--dark); }
.btn-sm { padding: 9px 16px; font-size: 0.88rem; }
.nav .btn { white-space: nowrap; }

/* ---------- Hero ---------- */

.hero { padding: 84px 0 64px; }
.hero-grid { display: grid; grid-template-columns: 1.25fr 0.75fr; gap: 56px; align-items: center; }
.hero h1 { max-width: 17ch; }
.hero .lede { margin-bottom: 30px; }
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-note { font-family: var(--font-mono); font-size: 0.78rem; color: var(--muted); margin-top: 16px; }

.hero-chart {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 26px;
}
.hero-chart .hc-label { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin-bottom: 4px; }
.hero-chart .hc-value { font-family: var(--font-mono); font-size: 2rem; font-weight: 600; color: var(--ink); margin-bottom: 14px; font-variant-numeric: tabular-nums; }
.hero-chart .hc-bars { display: flex; align-items: flex-end; gap: 8px; height: 110px; }
.hero-chart .hc-bar { flex: 1; background: var(--blue-chart); border-radius: 3px 3px 0 0; }
.hero-chart .hc-bar.hi { background: var(--blue); }
.hero-chart .hc-caption { font-size: 0.85rem; color: var(--muted); margin: 14px 0 0; font-style: italic; }

/* ---------- Sections ---------- */

.section { padding: 72px 0; }
.section-tight { padding: 56px 0; }
.section-head { max-width: 640px; margin-bottom: 40px; }
.on-card { background: var(--card); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

/* ---------- Proof strip ---------- */

.proof {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--card);
  padding: 34px 0;
}
.proof-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.proof-item .num {
  font-family: var(--font-mono); font-weight: 600;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  color: var(--blue); font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}
.proof-item .lbl { font-family: var(--font-display); font-size: 0.9rem; color: var(--muted); margin-top: 4px; line-height: 1.4; }

/* ---------- Cards ---------- */

.card-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow);
  display: flex; flex-direction: column;
}
.card h3 { margin-bottom: 10px; }
.card p { font-size: 0.98rem; color: var(--muted); }
.card .evidence {
  font-family: var(--font-mono); font-size: 0.78rem; color: var(--blue);
  border-top: 1px solid var(--line); padding-top: 14px; margin-top: auto;
}
.card-link { font-family: var(--font-display); font-weight: 600; font-size: 0.92rem; text-decoration: none; }

/* ---------- Offer band ---------- */

.offer {
  background: var(--dark); color: var(--dark-ink);
  border-radius: var(--radius);
  padding: 44px 48px;
  display: grid; grid-template-columns: 1.4fr 0.6fr; gap: 36px; align-items: center;
}
.offer .eyebrow { color: #7FB0EA; }
.offer h2 { color: #FFFFFF; }
.offer p { color: var(--dark-muted); margin-bottom: 0; }
.offer .price {
  font-family: var(--font-mono); font-size: 2.6rem; font-weight: 600; color: #FFFFFF;
  font-variant-numeric: tabular-nums;
}
.offer .price small { font-size: 0.95rem; color: var(--dark-muted); font-weight: 400; }
.offer-cta { text-align: center; display: flex; flex-direction: column; gap: 14px; align-items: center; }

/* ---------- Steps (approach) ---------- */

.steps { counter-reset: step; list-style: none; margin: 0; padding: 0; display: grid; gap: 18px; }
.step {
  counter-increment: step;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 28px 24px 84px; position: relative;
}
.step::before {
  content: "0" counter(step);
  position: absolute; left: 26px; top: 26px;
  font-family: var(--font-mono); font-weight: 600; font-size: 1.05rem;
  color: var(--blue);
}
.step h3 { margin-bottom: 6px; }
.step p { margin: 0; font-size: 0.98rem; color: var(--muted); }

/* ---------- Service detail sections ---------- */

.service { border-top: 1px solid var(--line); padding: 52px 0; }
.service:first-of-type { border-top: none; }
.service-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; }
.service h2 { font-size: 1.7rem; }
.service .who { font-family: var(--font-display); font-size: 0.92rem; color: var(--muted); margin-bottom: 18px; }
.service ul { padding-left: 1.2em; margin: 0 0 1.2em; }
.service li { margin-bottom: 0.5em; font-size: 0.98rem; }
.service li::marker { color: var(--blue); }
.service .evidence-box {
  background: var(--blue-tint); border-radius: var(--radius); padding: 20px 24px;
  font-size: 0.95rem;
}
.service .evidence-box .ev-label {
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.11em;
  text-transform: uppercase; color: var(--blue-deep); margin-bottom: 8px;
}
.service .evidence-box p { margin: 0; }

/* ---------- Booking page ---------- */

.book-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; align-items: stretch; }
.book-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 34px; display: flex; flex-direction: column;
}
.book-card.featured { border: 2px solid var(--blue); position: relative; }
.book-card .flag {
  position: absolute; top: -13px; left: 28px;
  background: var(--blue); color: #FFFFFF;
  font-family: var(--font-mono); font-size: 0.68rem; font-weight: 600;
  letter-spacing: 0.1em; text-transform: uppercase;
  padding: 4px 12px; border-radius: 99px;
}
.book-card .price-line {
  font-family: var(--font-mono); font-size: 2rem; font-weight: 600;
  margin: 4px 0 2px; font-variant-numeric: tabular-nums;
}
.book-card .duration { font-family: var(--font-display); font-size: 0.9rem; color: var(--muted); margin-bottom: 18px; }
.book-card ul { padding-left: 1.2em; margin: 0 0 24px; }
.book-card li { margin-bottom: 0.55em; font-size: 0.96rem; }
.book-card li::marker { color: var(--blue); }
.book-card .btn { margin-top: auto; text-align: center; }

/* ---------- About ---------- */

.about-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 56px; align-items: start; }
.portrait {
  border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line); box-shadow: var(--shadow);
  background: var(--blue-tint);
}
.portrait img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; }
.portrait-caption { font-family: var(--font-mono); font-size: 0.78rem; color: var(--muted); margin-top: 12px; }
.cred-list { list-style: none; padding: 0; margin: 0; }
.cred-list li {
  padding: 13px 0 13px 30px; border-bottom: 1px solid var(--line);
  position: relative; font-size: 0.98rem;
}
.cred-list li::before {
  content: "→"; position: absolute; left: 2px; color: var(--blue);
  font-family: var(--font-mono);
}
.timeline { list-style: none; padding: 0; margin: 24px 0 0; }
.timeline li { display: grid; grid-template-columns: 118px 1fr; gap: 18px; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 0.96rem; }
.timeline .yrs { font-family: var(--font-mono); font-size: 0.82rem; color: var(--muted); padding-top: 3px; font-variant-numeric: tabular-nums; }
.timeline strong { font-family: var(--font-display); font-weight: 600; }
.timeline span.co { color: var(--muted); }

/* ---------- Quote / pull ---------- */

.pull {
  border-left: 3px solid var(--blue);
  padding: 6px 0 6px 26px; margin: 36px 0;
  font-size: 1.35rem; line-height: 1.45; font-style: italic; color: var(--ink-2);
  max-width: 30ch; text-wrap: balance;
}
.pull .attr { display: block; font-family: var(--font-mono); font-style: normal; font-size: 0.78rem; color: var(--muted); margin-top: 12px; }

/* ---------- Forms ---------- */

.form { display: grid; gap: 18px; max-width: 560px; }
.form label { font-family: var(--font-display); font-weight: 600; font-size: 0.92rem; display: block; margin-bottom: 6px; }
.form input, .form textarea, .form select {
  width: 100%; padding: 12px 14px;
  border: 1px solid var(--line); border-radius: 6px;
  font-family: var(--font-body); font-size: 1rem; color: var(--ink);
  background: var(--card);
}
.form input:focus, .form textarea:focus, .form select:focus {
  outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px var(--blue-tint);
}
.form .hint { font-size: 0.85rem; color: var(--muted); margin-top: 5px; }

/* ---------- Dark CTA band ---------- */

.cta-band { background: var(--dark); padding: 76px 0; text-align: center; }
.cta-band h2 { color: #FFFFFF; max-width: 22ch; margin: 0 auto 14px; }
.cta-band p { color: var(--dark-muted); max-width: 52ch; margin: 0 auto 30px; }
.cta-band .tagline {
  font-family: var(--font-mono); font-size: 0.82rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: #7FB0EA; margin-bottom: 18px;
}

/* ---------- Footer ---------- */

.footer { background: var(--dark); color: var(--dark-muted); padding: 52px 0 36px; border-top: 1px solid #24374B; }
.footer a { color: var(--dark-ink); text-decoration: none; }
.footer a:hover { color: #7FB0EA; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 0.85fr 0.85fr; gap: 40px; margin-bottom: 36px; }
.footer h4 { color: #FFFFFF; font-size: 0.85rem; letter-spacing: 0.09em; text-transform: uppercase; margin-bottom: 14px; }
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin-bottom: 9px; font-size: 0.93rem; }
.footer .f-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; color: #FFFFFF; font-family: var(--font-display); font-weight: 700; }
.footer .f-tag { font-style: italic; font-size: 0.97rem; max-width: 34ch; }
.footer-legal {
  border-top: 1px solid #24374B; padding-top: 22px;
  display: flex; flex-wrap: wrap; gap: 10px 28px; justify-content: space-between;
  font-family: var(--font-mono); font-size: 0.75rem;
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .hero-grid, .about-grid, .service-grid { grid-template-columns: 1fr; gap: 36px; }
  .offer { grid-template-columns: 1fr; padding: 34px 30px; }
  .offer-cta { align-items: flex-start; text-align: left; }
  .proof-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero { padding: 56px 0 48px; }
}

@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-toggle {
    display: block; background: none; border: 1px solid var(--line); border-radius: 6px;
    padding: 8px 12px; font-family: var(--font-display); font-weight: 600; font-size: 0.85rem;
    color: var(--ink); cursor: pointer;
  }
  .nav.open .nav-links {
    display: flex; flex-direction: column; align-items: flex-start;
    position: absolute; top: 68px; left: 0; right: 0;
    background: var(--card); border-bottom: 1px solid var(--line);
    padding: 18px 24px; gap: 16px;
  }
  .card-grid, .book-grid { grid-template-columns: 1fr; }
  .timeline li { grid-template-columns: 1fr; gap: 2px; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* ---------- Fixes & a11y utilities ---------- */

.nav-links a.btn-primary,
.nav-links a.btn-primary:hover,
.nav-links a.btn-primary[aria-current="page"] { color: #FFFFFF; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--blue); color: #FFFFFF; padding: 10px 18px;
  font-family: var(--font-display); font-weight: 600; border-radius: 0 0 6px 0;
}
.skip-link:focus { left: 0; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.h-sub { font-size: 1.22rem; font-weight: 600; letter-spacing: -0.01em; margin: 0 0 10px; }

.hidden-field { position: absolute; left: -9999px; }

/* ---------- Two-track fork (home) ---------- */

.track-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.track-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 34px 32px; display: flex; flex-direction: column;
}
.track-card .track-eyebrow {
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--blue); margin-bottom: 12px;
}
.track-card h3 { font-size: 1.5rem; margin-bottom: 10px; }
.track-card p { color: var(--muted); font-size: 0.99rem; }
.track-card .track-meta {
  font-family: var(--font-mono); font-size: 0.82rem; color: var(--ink-2);
  border-top: 1px solid var(--line); padding-top: 16px; margin: 8px 0 20px;
}
.track-card .btn { margin-top: auto; align-self: flex-start; }

/* ---------- Pricing tiers (small business) ---------- */

.tiers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; align-items: stretch; }
.tier {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 30px 26px; display: flex; flex-direction: column;
  position: relative;
}
.tier.featured { border: 2px solid var(--blue); }
.tier .flag {
  position: absolute; top: -13px; left: 26px;
  background: var(--blue); color: #FFFFFF;
  font-family: var(--font-mono); font-size: 0.68rem; font-weight: 600;
  letter-spacing: 0.1em; text-transform: uppercase;
  padding: 4px 12px; border-radius: 99px;
}
.tier .tier-name { font-family: var(--font-display); font-weight: 600; font-size: 1.2rem; margin-bottom: 6px; }
.tier .tier-price {
  font-family: var(--font-mono); font-size: 1.9rem; font-weight: 600;
  font-variant-numeric: tabular-nums; line-height: 1.1;
}
.tier .tier-price small { font-size: 0.9rem; color: var(--muted); font-weight: 400; }
.tier .tier-setup { font-family: var(--font-mono); font-size: 0.8rem; color: var(--muted); margin: 4px 0 20px; }
.tier .tier-lead { font-size: 0.9rem; color: var(--ink-2); font-weight: 600; font-family: var(--font-display); margin: 0 0 12px; }
.tier .btn { margin-top: auto; text-align: center; }

.feature-list { list-style: none; padding: 0; margin: 0 0 24px; }
.feature-list li { padding: 7px 0 7px 28px; position: relative; font-size: 0.93rem; line-height: 1.45; }
.feature-list li::before {
  content: "✓"; position: absolute; left: 2px; top: 7px;
  color: var(--good); font-weight: 700; font-family: var(--font-display);
}

.addon-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; }
.addon-chip {
  font-family: var(--font-mono); font-size: 0.8rem; color: var(--ink-2);
  background: var(--wash); border: 1px solid var(--line); border-radius: 99px;
  padding: 7px 15px;
}

@media (max-width: 900px) {
  .tiers { grid-template-columns: 1fr; }
  .track-grid { grid-template-columns: 1fr; }
}

/* ---------- Partner band (offer component tweaks for a feature list) ---------- */

.offer .feature-list { margin: 20px 0 0; }
.offer .feature-list li { color: var(--dark-ink); }
.offer .feature-list li::before { color: #5FBF82; }
.offer .setup-line { font-family: var(--font-mono); font-size: 0.85rem; color: var(--dark-muted); margin-top: 2px; }

/* ---------- Split hero (home) — two distinct doors ---------- */

.split-hero { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.split-panel {
  display: flex; flex-direction: column;
  border-radius: var(--radius); padding: 42px 38px;
  text-decoration: none; border: 1px solid var(--line);
  min-height: 300px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.split-panel:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.split-panel .split-eyebrow {
  font-family: var(--font-mono); font-size: 0.74rem; font-weight: 500;
  letter-spacing: 0.13em; text-transform: uppercase; margin-bottom: 16px;
}
.split-panel h2 { font-size: clamp(1.5rem, 2.6vw, 2rem); margin-bottom: 12px; }
.split-panel p { font-size: 1rem; margin-bottom: 22px; }
.split-panel .split-cta { margin-top: auto; font-family: var(--font-display); font-weight: 600; font-size: 1rem; }

.split-light { background: var(--card); color: var(--ink); }
.split-light .split-eyebrow { color: var(--blue); }
.split-light h2 { color: var(--ink); }
.split-light p { color: var(--muted); }
.split-light .split-cta { color: var(--blue); }

.split-dark { background: var(--dark); border-color: var(--dark); color: var(--dark-ink); }
.split-dark .split-eyebrow { color: #7FB0EA; }
.split-dark h2 { color: #FFFFFF; }
.split-dark p { color: var(--dark-muted); }
.split-dark .split-cta { color: #7FB0EA; }

@media (max-width: 760px) { .split-hero { grid-template-columns: 1fr; } }