/* ============================================================
   Lean AI Consulting — Shared Styles
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  --navy: #0b1e3d;
  --navy-light: #142c52;
  --blue: #1d4ed8;
  --blue-light: #3b82f6;
  --cyan: #0ea5e9;
  --bg: #f8fafc;
  --bg-alt: #eef2f8;
  --ink: #0f172a;
  --slate: #475569;
  --slate-light: #94a3b8;
  --border: #e2e8f0;
  --white: #ffffff;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --max-width: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--navy);
  line-height: 1.15;
  margin: 0 0 0.5em 0;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.25rem, 4vw, 3.4rem); font-weight: 700; }
h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 600; }

p { margin: 0 0 1em 0; }

a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--cyan); }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

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

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 13px 26px;
  border-radius: 6px;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
}
.btn-primary {
  background: var(--blue);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--navy);
  color: var(--white);
}
.btn-outline {
  background: transparent;
  border-color: var(--white);
  color: var(--white);
}
.btn-outline:hover {
  background: var(--white);
  color: var(--navy);
}
.btn-outline-dark {
  background: transparent;
  border-color: var(--blue);
  color: var(--blue);
}
.btn-outline-dark:hover {
  background: var(--blue);
  color: var(--white);
}

/* ---------- Header / Nav ---------- */
header.site-header {
  background: var(--navy);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--white);
  letter-spacing: -0.01em;
}
.logo svg { flex-shrink: 0; }
.logo span.accent { color: var(--cyan); }

nav.primary-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}
nav.primary-nav a {
  color: rgba(255,255,255,0.85);
  font-size: 0.95rem;
  font-weight: 500;
}
nav.primary-nav a:hover, nav.primary-nav a.active { color: var(--cyan); }

.nav-cta { display: flex; align-items: center; gap: 20px; }

.nav-toggle { display: none; }
.nav-toggle-label {
  display: none;
  cursor: pointer;
  color: var(--white);
  font-size: 1.6rem;
  line-height: 1;
}

@media (max-width: 860px) {
  nav.primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--navy-light);
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 24px 20px;
    gap: 14px;
    display: none;
  }
  .nav-toggle:checked ~ nav.primary-nav { display: flex; }
  .nav-toggle-label { display: block; }
  .nav-cta .btn-outline { display: none; }
}

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(180deg, var(--navy) 0%, var(--navy-light) 100%);
  color: var(--white);
  padding: 96px 0 88px;
}
.hero .container {
  display: grid;
  grid-template-columns: 1.15fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 18px;
  display: block;
}
.hero h1 { color: var(--white); margin-bottom: 20px; }
.hero p.lead {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.8);
  max-width: 520px;
  margin-bottom: 32px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

@media (max-width: 860px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero { padding: 56px 0 56px; text-align: left; }
}

/* ---------- Sections ---------- */
section { padding: 88px 0; }
section.alt { background: var(--bg-alt); }
section.navy {
  background: var(--navy);
  color: rgba(255,255,255,0.85);
}
section.navy h2, section.navy h3 { color: var(--white); }

.section-head {
  max-width: 680px;
  margin: 0 auto 48px;
  text-align: center;
}
.section-head.left { text-align: left; margin: 0 0 48px; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
  display: block;
  margin-bottom: 12px;
}
section.navy .eyebrow { color: var(--cyan); }

/* ---------- Thesis / Pull-quote ---------- */
.thesis {
  background: var(--white);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.thesis-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.pull-quote {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  font-weight: 700;
  color: var(--navy);
  line-height: 1.25;
  margin: 0 0 24px 0;
  border-left: 4px solid var(--cyan);
  padding-left: 24px;
}
@media (max-width: 900px) {
  .thesis-grid { grid-template-columns: 1fr; }
}

/* ---------- Chart ---------- */
.chart-card {
  background: var(--navy);
  border-radius: 14px;
  padding: 32px 28px 20px;
}
.chart-card .chart-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: rgba(255,255,255,0.55);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ---------- Pillars / Cards ---------- */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
@media (max-width: 900px) {
  .pillars { grid-template-columns: 1fr; }
}
.pillar-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
}
.pillar-num {
  font-family: var(--font-mono);
  color: var(--cyan);
  font-size: 0.85rem;
  margin-bottom: 14px;
}
.pillar-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(14,165,233,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.pillar-card h3 { margin-bottom: 10px; }
.pillar-card p { font-size: 0.95rem; flex-grow: 1; }
.pillar-card ul {
  padding-left: 18px;
  margin: 14px 0 20px;
  font-size: 0.9rem;
}
.pillar-card ul li { margin-bottom: 6px; }
.pillar-card .btn { align-self: flex-start; margin-top: auto; }

.stat-badge {
  display: inline-block;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--navy);
  margin-bottom: 16px;
}

/* ---------- Service detail blocks ---------- */
.service-block {
  display: grid;
  grid-template-columns: 0.9fr 1.4fr;
  gap: 48px;
  padding: 56px 0;
  border-bottom: 1px solid var(--border);
}
.service-block:last-child { border-bottom: none; }
@media (max-width: 860px) {
  .service-block { grid-template-columns: 1fr; gap: 24px; }
}
.service-offer {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 22px 24px;
  margin-bottom: 16px;
}
.service-offer h4 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--navy);
  margin-bottom: 6px;
}
.service-offer p { font-size: 0.92rem; margin: 0; }

/* ---------- Steps ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
@media (max-width: 900px) {
  .steps { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .steps { grid-template-columns: 1fr; }
}
.step {
  border-top: 3px solid var(--cyan);
  padding-top: 16px;
}
.step-num {
  font-family: var(--font-mono);
  color: var(--slate-light);
  font-size: 0.85rem;
}

/* ---------- Credentials list ---------- */
.credentials {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.credentials li {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--navy);
  display: flex;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.credentials li span.year {
  color: var(--blue);
  min-width: 48px;
  flex-shrink: 0;
}

/* ---------- CTA band ---------- */
.cta-band {
  background: var(--blue);
  color: var(--white);
  text-align: center;
  padding: 64px 0;
}
.cta-band h2 { color: var(--white); }
.cta-band p { color: rgba(255,255,255,0.85); max-width: 520px; margin: 0 auto 28px; }

/* ---------- Forms ---------- */
form.contact-form {
  display: grid;
  gap: 18px;
  max-width: 560px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 560px) { .form-row { grid-template-columns: 1fr; } }
label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 6px;
  display: block;
}
input, textarea, select {
  width: 100%;
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 11px 14px;
  border: 1.5px solid var(--border);
  border-radius: 6px;
  background: var(--white);
  color: var(--ink);
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--blue);
}
textarea { resize: vertical; min-height: 120px; }

/* ---------- Footer ---------- */
footer.site-footer {
  background: var(--navy);
  color: rgba(255,255,255,0.65);
  padding: 48px 0 28px;
  font-size: 0.9rem;
}
.footer-grid {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 32px;
  margin-bottom: 32px;
}
.footer-col h4 {
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.9rem;
  margin-bottom: 12px;
}
.footer-col a {
  display: block;
  color: rgba(255,255,255,0.65);
  margin-bottom: 8px;
  font-size: 0.9rem;
}
.footer-col a:hover { color: var(--cyan); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 20px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.45);
}

/* ---------- Utility ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.small-caps {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* Visible focus for accessibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}