/* ==========================================================
   Design tokens
   ========================================================== */
/* High-contrast palette: white / near-black / deep cobalt.
   To go back to the original warm-cream + teal scheme, swap in these values:
   --bg #f7f5f0  --surface #ffffff  --surface-alt #efece4  --ink #16181d  --ink-soft #4a4f5a
   --ink-faint #7a7f89  --line #dcd8cd  --accent #0f6b5c  --accent-soft #dcefe9  --dark #12161c
   --dark-accent #5fd3bb  --dark-accent-ink #06201b */
:root {
  --bg: #ffffff;
  --surface: #f2f4f8;
  --surface-alt: #e6e9f0;
  --ink: #0a0c10;
  --ink-soft: #2f3542;
  --ink-faint: #555c6b;
  --line: #c9ced8;
  --accent: #1a3fd1;
  --accent-ink: #ffffff;
  --accent-soft: #e2e8ff;

  /* Dark band (contact section + footer) */
  --dark: #070a12;
  --dark-ink: #ffffff;
  --dark-strong: #e3e7ee;
  --dark-soft: #c2c9d4;
  --dark-faint: #9aa3b2;
  --dark-field: #121827;
  --dark-border: #34405a;
  --dark-accent: #8fb0ff;
  --dark-accent-ink: #070a12;
  --dark-error: #ffa294;

  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;

  --radius: 14px;
  --max: 1160px;
  --gutter: clamp(16px, 4vw, 40px);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #080b12;
    --surface: #111622;
    --surface-alt: #1a2030;
    --ink: #f7f8fa;
    --ink-soft: #cdd3dd;
    --ink-faint: #9ea7b6;
    --line: #2d3547;
    --accent: #8fb0ff;
    --accent-ink: #070a12;
    --accent-soft: #1a2750;
    --dark: #000000;
  }
}

/* ==========================================================
   Base
   ========================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--font-display); font-weight: 500; line-height: 1.15; margin: 0; letter-spacing: -0.01em; }
p { margin: 0; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.eyebrow {
  font-size: 13px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent);
}
.section { padding: clamp(64px, 10vw, 120px) 0; }
.section-head { max-width: 680px; margin-bottom: 48px; }
.section-head h2 { font-size: clamp(32px, 4.5vw, 48px); margin-top: 12px; }
.section-head p { color: var(--ink-soft); margin-top: 16px; font-size: 18px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 24px; border-radius: 999px; border: 1px solid transparent;
  font: 600 15px/1 var(--font-body); text-decoration: none; cursor: pointer;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-ghost { border-color: var(--line); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--ink-faint); }

/* ==========================================================
   Header / nav
   ========================================================== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; font-size: 18px; }
.brand-mark {
  width: 30px; height: 30px; border-radius: 8px; background: var(--accent); color: var(--accent-ink);
  display: grid; place-items: center; font-family: var(--font-display); font-size: 17px;
}
.nav-links { display: flex; align-items: center; gap: 32px; list-style: none; margin: 0; padding: 0; }
.nav-links a { text-decoration: none; font-size: 15px; font-weight: 500; color: var(--ink-soft); }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ink); }
.nav-links .btn { color: var(--accent-ink); padding: 11px 20px; }
.nav-toggle { display: none; background: none; border: 0; padding: 8px; cursor: pointer; color: var(--ink); }

@media (max-width: 800px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none; position: absolute; top: 72px; left: 0; right: 0;
    flex-direction: column; align-items: flex-start; gap: 20px;
    padding: 24px var(--gutter) 32px; background: var(--bg); border-bottom: 1px solid var(--line);
  }
  .nav-links.open { display: flex; }
}

/* ==========================================================
   Hero
   ========================================================== */
.hero { padding: clamp(64px, 11vw, 140px) 0 clamp(56px, 8vw, 100px); }
.hero h1 { font-size: clamp(38px, 6.2vw, 76px); max-width: 17ch; margin-top: 20px; }
.hero h1 em { font-style: italic; color: var(--accent); white-space: nowrap; }
.hero-lede { font-size: clamp(18px, 2vw, 21px); color: var(--ink-soft); max-width: 60ch; margin-top: 28px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 40px; }

.lifecycle {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 0;
  margin-top: clamp(56px, 8vw, 88px); border-top: 1px solid var(--line);
}
.lifecycle div { padding: 24px 24px 0 0; }
.lifecycle div + div { padding-left: 24px; border-left: 1px solid var(--line); }
.lifecycle strong { display: block; font-family: var(--font-display); font-weight: 500; font-size: 22px; }
.lifecycle span { color: var(--ink-faint); font-size: 15px; }
@media (max-width: 700px) {
  .lifecycle { grid-template-columns: 1fr; }
  .lifecycle div, .lifecycle div + div { padding: 20px 0; border-left: 0; border-bottom: 1px solid var(--line); }
}

/* ==========================================================
   Services
   ========================================================== */
.services { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.phase { display: grid; grid-template-columns: 240px 1fr; gap: 32px; padding: 40px 0; border-top: 1px solid var(--line); }
.section-head + .phase { border-top: 0; padding-top: 0; }
.phase-label .num { font-family: var(--font-display); font-size: 15px; color: var(--ink-faint); }
.phase-label h3 { font-size: 26px; margin-top: 6px; }
.phase-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.card {
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; display: flex; flex-direction: column; gap: 14px;
}
.card-icon {
  width: 44px; height: 44px; border-radius: 10px; background: var(--accent-soft); color: var(--accent);
  display: grid; place-items: center;
}
.card h4 { margin: 0; font-size: 19px; font-weight: 650; line-height: 1.3; }
.card p { color: var(--ink-soft); font-size: 16px; }
.card ul { margin: 4px 0 0; padding: 0; list-style: none; display: grid; gap: 6px; }
.card li { font-size: 14.5px; color: var(--ink-soft); padding-left: 18px; position: relative; }
.card li::before { content: ""; position: absolute; left: 0; top: 10px; width: 8px; height: 2px; background: var(--accent); }
@media (max-width: 900px) {
  .phase { grid-template-columns: 1fr; gap: 20px; }
  .phase-cards { grid-template-columns: 1fr; }
}

/* ==========================================================
   Why us page
   ========================================================== */
.page-hero { padding: clamp(56px, 9vw, 110px) 0 clamp(40px, 6vw, 72px); }
.page-hero h1 { font-size: clamp(44px, 7vw, 80px); }

.why-points { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.why-item { padding: 40px 32px 44px; }
.why-item:first-child { padding-left: 0; }
.why-item + .why-item { border-left: 1px solid var(--line); }
.why-item .num { font-family: var(--font-display); font-size: 15px; color: var(--accent); }
.why-item h2 { font-size: 24px; margin-top: 10px; }
.why-item p { color: var(--ink-soft); margin-top: 12px; font-size: 16.5px; }
@media (max-width: 860px) {
  .why-grid { grid-template-columns: 1fr; }
  .why-item, .why-item:first-child { padding: 28px 0; }
  .why-item + .why-item { border-left: 0; border-top: 1px solid var(--line); }
}

.bio {
  display: grid; grid-template-columns: 220px 1fr; gap: clamp(28px, 5vw, 64px);
  padding: 48px 0; border-top: 1px solid var(--line);
}
.section-head + .bio { border-top: 0; padding-top: 8px; }
.bio-side h3 { font-size: 28px; margin-top: 20px; }
.bio-body { max-width: 68ch; }
.bio-body p { color: var(--ink-soft); font-size: 18px; line-height: 1.7; }
.bio-body p + p { margin-top: 18px; }
.bio-body a { color: var(--accent); font-weight: 500; text-decoration: none; }
.bio-body a:hover { text-decoration: underline; }
@media (max-width: 760px) {
  .bio { grid-template-columns: 1fr; gap: 20px; }
}

.avatar {
  flex: none; width: 88px; height: 88px; border-radius: 50%; overflow: hidden;
  background: var(--accent-soft); color: var(--accent);
  display: grid; place-items: center; font-family: var(--font-display); font-size: 30px;
}
.avatar-lg { width: 160px; height: 160px; font-size: 52px; }
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.profile-link {
  display: inline-flex; align-items: center; gap: 8px; margin-top: 10px;
  font-size: 14.5px; font-weight: 500; color: var(--accent); text-decoration: none;
}
.profile-link:hover { text-decoration: underline; }
.book-link { display: flex; align-items: center; gap: 10px; margin-top: 14px; line-height: 1.45; }
.book-link svg { flex: none; }

/* ==========================================================
   Use cases page
   ========================================================== */
.uc-index { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 40px 0 48px; }
.uc-group + .uc-group { margin-top: 36px; }
.uc-group-title { font-size: 15px; font-family: var(--font-body); font-weight: 700; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 14px; }
.uc-group-title a { color: var(--ink); text-decoration: none; }
.uc-group-title a:hover { color: var(--accent); }
.uc-index-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
.uc-card {
  display: flex; flex-direction: column; gap: 10px; padding: 28px; text-decoration: none;
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius);
  transition: border-color .15s ease, transform .15s ease;
}
.uc-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.uc-industry { font-size: 12.5px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); }
.uc-card h3 { font-family: var(--font-display); font-weight: 500; font-size: 24px; margin: 0; }
.uc-card p { color: var(--ink-soft); font-size: 16px; }
.uc-more { margin-top: auto; padding-top: 6px; font-size: 14.5px; font-weight: 600; color: var(--accent); }

.use-case { padding: clamp(56px, 9vw, 100px) 0; }
.use-case + .use-case { border-top: 1px solid var(--line); }
.uc-category { background: var(--ink); color: var(--bg); padding: 36px 0; }
.uc-category .eyebrow { color: var(--bg); opacity: .75; }
.uc-category h2 { font-size: clamp(30px, 4.5vw, 44px); margin-top: 6px; }
.uc-wrap { max-width: 860px; display: flex; flex-direction: column; gap: 48px; }
.uc-head h2 { font-size: clamp(34px, 5vw, 52px); margin-top: 12px; }
.uc-lede { font-size: 20px; color: var(--ink-soft); margin-top: 14px; max-width: 60ch; }
.uc-block h3 { font-size: 26px; margin-bottom: 16px; }
.uc-block > p { color: var(--ink-soft); font-size: 17.5px; line-height: 1.7; }
.uc-goal { margin-top: 20px; padding: 18px 22px; background: var(--accent-soft); border-left: 4px solid var(--accent); border-radius: 8px; color: var(--ink) !important; }
.uc-goal strong { color: var(--accent); }

.uc-metrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.uc-metric { display: flex; flex-direction: column; gap: 8px; padding: 22px 24px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.uc-metric h4 { margin: 0; font-family: var(--font-display); font-weight: 500; font-size: 21px; }
.uc-formula { font-weight: 700; font-size: 15px; color: var(--accent); }
.uc-metric p { color: var(--ink-soft); font-size: 15.5px; }
.uc-meta { font-size: 13.5px; color: var(--ink-faint); }

.uc-flow { list-style: none; margin: 0; padding: 0; counter-reset: step; }
.uc-flow li { counter-increment: step; position: relative; padding: 0 0 26px 56px; color: var(--ink-soft); font-size: 16.5px; }
.uc-flow li::before {
  content: counter(step); position: absolute; left: 0; top: 0; width: 34px; height: 34px; border-radius: 50%;
  background: var(--accent); color: var(--accent-ink); font-weight: 700; font-size: 15px; display: grid; place-items: center;
}
.uc-flow li::after { content: ""; position: absolute; left: 16px; top: 38px; bottom: 4px; width: 2px; background: var(--line); }
.uc-flow li:last-child { padding-bottom: 0; }
.uc-flow li:last-child::after { display: none; }
.uc-flow b { display: block; color: var(--ink); font-size: 18px; margin-bottom: 2px; }

.uc-block > p + .uc-stats { margin-top: 18px; }
.uc-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; }
.uc-stats div { padding: 20px 22px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); display: flex; flex-direction: column; gap: 6px; }
.uc-stats strong { font-family: var(--font-display); font-weight: 500; font-size: 34px; color: var(--accent); line-height: 1.1; }
.uc-stats span { font-size: 14.5px; color: var(--ink-soft); }

.uc-guards { margin: 0; border-top: 2px solid var(--ink); }
.uc-guards div { display: grid; grid-template-columns: 160px 1fr; gap: 20px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.uc-guards dt { font-size: 13.5px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); padding-top: 2px; }
.uc-guards dd { margin: 0; color: var(--ink-soft); font-size: 16.5px; }
@media (max-width: 600px) {
  .uc-guards div { grid-template-columns: 1fr; gap: 4px; }
}

.cta-band { background: var(--dark); color: var(--dark-ink); padding: clamp(48px, 7vw, 80px) 0; }
.cta-band .container { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; }
.cta-band h2 { font-size: clamp(28px, 4vw, 40px); }
.cta-band .btn-primary { background: var(--dark-accent); color: var(--dark-accent-ink); }
.cta-band + .site-footer { border-top: 1px solid var(--dark-border); }

/* ==========================================================
   Contact / CTA
   ========================================================== */
.contact { background: var(--dark); color: var(--dark-ink); }
.contact .eyebrow { color: var(--dark-accent); }
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: clamp(32px, 6vw, 80px); }
.contact h2 { font-size: clamp(32px, 4.5vw, 52px); margin-top: 12px; }
.contact-intro p { color: var(--dark-soft); margin-top: 20px; font-size: 18px; }
.contact-steps { list-style: none; padding: 0; margin: 36px 0 0; display: grid; gap: 18px; }
.contact-steps li { display: flex; gap: 14px; color: var(--dark-strong); font-size: 16px; }
.contact-steps b {
  flex: none; width: 28px; height: 28px; border-radius: 50%; border: 1px solid var(--dark-border);
  display: grid; place-items: center; font-size: 13px; color: var(--dark-accent);
}
.form { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 14px; color: var(--dark-soft); font-weight: 500; }
.field input, .field select, .field textarea {
  font: inherit; font-size: 16px; color: var(--dark-ink); background: var(--dark-field);
  border: 1px solid var(--dark-border); border-radius: 10px; padding: 12px 14px; width: 100%;
}
.field textarea { min-height: 130px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--dark-accent); outline-offset: 1px; border-color: transparent; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips label {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer; font-size: 14px; color: var(--dark-strong);
  border: 1px solid var(--dark-border); border-radius: 999px; padding: 8px 14px; background: var(--dark-field);
}
.chips input { accent-color: var(--dark-accent); }
.chips label:has(input:checked) { border-color: var(--dark-accent); color: var(--dark-ink); }
.form .btn-primary { background: var(--dark-accent); color: var(--dark-accent-ink); justify-self: start; }
.form-note { grid-column: 1 / -1; font-size: 13px; color: var(--dark-faint); }
.form-status { grid-column: 1 / -1; font-size: 15px; min-height: 1.4em; }
.form-status.ok { color: var(--dark-accent); }
.form-status.err { color: var(--dark-error); }
.hp { position: absolute; left: -9999px; }
@media (max-width: 900px) {
  .contact-grid { grid-template-columns: 1fr; }
  .form { grid-template-columns: 1fr; }
}

/* ==========================================================
   Footer
   ========================================================== */
.site-footer { background: var(--dark); color: var(--dark-faint); border-top: 1px solid var(--dark-border); padding: 32px 0; font-size: 14px; }
.site-footer .container { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; }
.site-footer a { color: var(--dark-soft); text-decoration: none; margin-left: 20px; }
.site-footer a:first-child { margin-left: 0; }
.site-footer a:hover { color: var(--dark-ink); }

/* ==========================================================
   Blog
   ========================================================== */
.blog-hero { padding: clamp(56px, 9vw, 100px) 0 40px; }
.blog-hero h1 { font-size: clamp(40px, 6vw, 64px); }
.blog-hero p { color: var(--ink-soft); font-size: 19px; max-width: 58ch; margin-top: 18px; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 32px; }
.filters button {
  font: 500 14px var(--font-body); padding: 8px 16px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--line); background: transparent; color: var(--ink-soft);
}
.filters button[aria-pressed="true"] { background: var(--ink); color: var(--bg); border-color: var(--ink); }

.post-list { display: grid; gap: 0; padding-bottom: 100px; }
.post-item {
  display: grid; grid-template-columns: 160px 1fr auto; gap: 32px; align-items: baseline;
  padding: 32px 0; border-top: 1px solid var(--line); text-decoration: none;
}
.post-item:last-child { border-bottom: 1px solid var(--line); }
.post-item time { color: var(--ink-faint); font-size: 14px; }
.post-item h2 { font-size: 26px; }
.post-item:hover h2 { color: var(--accent); }
.post-item p { color: var(--ink-soft); margin-top: 10px; font-size: 16px; }
.post-item .arrow { color: var(--ink-faint); font-size: 22px; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.tag { font-size: 12px; font-weight: 600; letter-spacing: .04em; color: var(--accent); background: var(--accent-soft); padding: 4px 10px; border-radius: 999px; }
.empty { padding: 48px 0; color: var(--ink-faint); }
@media (max-width: 700px) {
  .post-item { grid-template-columns: 1fr; gap: 8px; }
  .post-item .arrow { display: none; }
}

.article { max-width: 720px; margin: 0 auto; padding: clamp(48px, 8vw, 88px) 0 100px; }
.back { font-size: 15px; text-decoration: none; color: var(--ink-soft); }
.back:hover { color: var(--ink); }
.article h1 { font-size: clamp(34px, 5vw, 52px); margin-top: 28px; }
.article-meta { color: var(--ink-faint); font-size: 15px; margin-top: 18px; }
.article-body { margin-top: 40px; font-size: 18.5px; line-height: 1.75; }
.article-body p { margin: 0 0 1.3em; }
.article-body h2 { font-size: 28px; margin: 1.6em 0 .6em; }
.article-body ul, .article-body ol { padding-left: 1.3em; margin: 0 0 1.3em; }
.article-body li { margin-bottom: .4em; }
.article-body blockquote { margin: 1.6em 0; padding-left: 20px; border-left: 3px solid var(--accent); font-family: var(--font-display); font-size: 22px; font-style: italic; }
.linkedin-cta {
  margin-top: 48px; padding: 24px 28px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 16px;
}
.linkedin-cta p { color: var(--ink-soft); font-size: 15px; }