/* ============================================================
   Technology Atlas — Shared Stylesheet
   ============================================================ */

/* --- Google Fonts Import --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* --- Design Tokens --- */
:root {
  --navy:       #1F3864;
  --navy-deep:  #14233f;
  --blue:       #2056B0;
  --accent:     #2E6BD6;
  --text:       #1A2740;
  --muted:      #5A6472;
  --bg:         #FFFFFF;
  --bg-soft:    #F5F7FA;
  --bg-blue:    #EEF3FB;
  --border:     #E2E6EC;
  --shadow:     0 2px 8px rgba(0,0,0,0.06);
  --shadow-md:  0 4px 20px rgba(0,0,0,0.09);
  --radius:     6px;
  --radius-lg:  10px;
  --font:       'Inter', Arial, system-ui, sans-serif;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--muted);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

/* --- Skip link (a11y) --- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 2000;
  background: var(--navy);
  color: #fff;
  padding: 12px 18px;
  border-radius: 0 0 var(--radius) 0;
  font-weight: 600;
  font-size: 0.9rem;
}
.skip-link:focus {
  left: 0;
  text-decoration: none;
  outline: 3px solid var(--accent);
}

/* Anchor targets clear the sticky header (+ model sub-nav) on direct deep-links */
[id] { scroll-margin-top: 96px; }
.model-subnav ~ * [id],
#assess, #chart, #navigate { scroll-margin-top: 150px; }
ul { list-style: none; }

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font);
  font-weight: 700;
  color: var(--text);
  line-height: 1.15;
}
h1 { font-size: clamp(2rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.15rem); }
h3 { font-size: 1.2rem; }
h4 { font-size: 1rem; }
p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

.eyebrow {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 0.5rem;
}
.accent-word { color: var(--accent); }

/* --- Layout Utilities --- */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 80px 0; }
.section-sm { padding: 56px 0; }
.section-lg { padding: 100px 0; }

.text-center { text-align: center; }
.text-left   { text-align: left; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }

/* --- Buttons --- */
.btn {
  display: inline-block;
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 13px 28px;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background 0.18s, color 0.18s, border-color 0.18s, transform 0.12s;
  white-space: nowrap;
  text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--blue);
  color: #fff;
  border-color: var(--blue);
}
.btn-primary:hover { background: #1a4a9a; border-color: #1a4a9a; color: #fff; }

.btn-secondary {
  background: transparent;
  color: var(--blue);
  border-color: var(--blue);
}
.btn-secondary:hover { background: var(--blue); color: #fff; }

.btn-white {
  background: #fff;
  color: var(--navy);
  border-color: #fff;
}
.btn-white:hover { background: transparent; color: #fff; border-color: #fff; }

.btn-white-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.7);
}
.btn-white-outline:hover { background: rgba(255,255,255,0.15); color: #fff; }

.btn-group { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }

/* --- Navigation --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 6px rgba(0,0,0,0.06);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  padding: 0 24px;
  max-width: 1200px;
  margin: 0 auto;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-mark {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
}
.logo-text {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--navy);
  line-height: 1.2;
}
.logo-text span { display: block; }
.logo:hover { text-decoration: none; }

.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text);
  padding: 8px 12px;
  border-radius: 4px;
  transition: color 0.15s, background 0.15s;
}
.site-nav a:hover { color: var(--blue); background: var(--bg-soft); text-decoration: none; }
.site-nav a.active { color: var(--blue); }

.header-cta { margin-left: 16px; }
.header-cta .btn { padding: 10px 20px; font-size: 0.72rem; }

/* Mobile hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 6px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: transform 0.22s, opacity 0.22s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --- Page Hero (inner pages) --- */
.page-hero {
  background: linear-gradient(135deg, var(--navy-deep) 0%, var(--navy) 60%, #2056B0 100%);
  padding: 72px 0 64px;
  color: #fff;
}
.page-hero h1 { color: #fff; margin-bottom: 0.75rem; }
.page-hero .subhead { font-size: 1.1rem; color: rgba(255,255,255,0.82); max-width: 640px; }
.page-hero .lead { font-size: 1rem; color: rgba(255,255,255,0.75); max-width: 680px; margin-top: 0.75rem; }

/* --- Cards --- */
.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 26px;
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s, transform 0.2s;
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }

.card-icon {
  width: 44px;
  height: 44px;
  background: var(--blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  flex-shrink: 0;
}
.card-icon svg { width: 22px; height: 22px; color: #fff; stroke: #fff; fill: none; }

.card h3 { color: var(--text); margin-bottom: 10px; }
.card p { font-size: 0.92rem; }

/* Stage cards (Assess / Chart / Navigate) */
.stage-card {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-left: 4px solid var(--blue);
  border-radius: var(--radius-lg);
  padding: 32px 30px;
}
.stage-card .stage-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.stage-num {
  width: 32px;
  height: 32px;
  background: var(--blue);
  color: #fff;
  border-radius: 50%;
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.stage-card h3 { color: var(--text); font-size: 1.25rem; margin-bottom: 4px; }
.stage-card .stage-subtitle {
  font-style: italic;
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 14px;
  display: block;
}
.stage-card .what-you-get { margin-top: 18px; }
.stage-card .what-you-get h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--blue);
  margin-bottom: 10px;
}
.stage-card .what-you-get ul { list-style: none; }
.stage-card .what-you-get li {
  padding-left: 1.4em;
  position: relative;
  margin-bottom: 6px;
  font-size: 0.92rem;
}
.stage-card .what-you-get li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--blue);
  font-weight: 700;
}

/* --- Stats Strip --- */
.stats-strip {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 36px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stat-item { padding: 16px 12px; }
.stat-icon {
  width: 48px;
  height: 48px;
  background: var(--blue);
  border-radius: 50%;
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.stat-icon svg { width: 22px; height: 22px; stroke: #fff; fill: none; }
.stat-num {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--blue);
  line-height: 1;
  display: block;
}
.stat-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--muted);
  margin-top: 4px;
  line-height: 1.4;
}

/* --- Infographic Placeholder --- */
.infographic-placeholder {
  background: var(--bg-soft);
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 32px;
  text-align: center;
  margin: 40px 0;
}
.infographic-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin: 24px 0;
  flex-wrap: wrap;
}
.infographic-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  flex: 0 0 140px;
}
.infographic-step .step-circle {
  width: 64px;
  height: 64px;
  background: var(--blue);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 800;
  border: 3px solid #fff;
  box-shadow: 0 0 0 3px var(--blue);
}
.infographic-step .step-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.infographic-connector {
  flex: 1;
  height: 3px;
  border-top: 3px dashed var(--border);
  min-width: 40px;
  max-width: 80px;
  align-self: center;
  position: relative;
  top: -16px;
}
.infographic-tracks {
  display: flex;
  justify-content: space-around;
  max-width: 520px;
  margin: 16px auto 0;
  gap: 24px;
}
.infographic-track {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}
.track-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--blue);
  flex-shrink: 0;
}

/* --- Testimonial Placeholder --- */
.testimonials-placeholder {
  background: var(--bg-soft);
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 56px 32px;
  text-align: center;
}
.testimonials-placeholder .placeholder-icon {
  width: 56px; height: 56px;
  background: var(--bg-blue);
  border-radius: 50%;
  margin: 0 auto 16px;
  display: flex; align-items: center; justify-content: center;
}
.testimonials-placeholder .placeholder-icon svg { width: 26px; height: 26px; stroke: var(--blue); fill: none; }
.placeholder-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--blue);
  font-weight: 600;
  margin-bottom: 8px;
  display: block;
}
.placeholder-text {
  font-size: 0.88rem;
  color: var(--muted);
  max-width: 420px;
  margin: 0 auto;
}

/* --- Case Study Placeholder --- */
.case-study-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card-placeholder {
  background: var(--bg);
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 24px;
  text-align: center;
}
.case-card-placeholder .case-tag {
  display: inline-block;
  background: var(--bg-blue);
  color: var(--blue);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 20px;
  margin-bottom: 12px;
}

/* --- Woven Throughout Callout --- */
.woven-callout {
  background: var(--bg-blue);
  border-left: 4px solid var(--blue);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin: 40px 0;
}
.woven-callout h3 { color: var(--text); margin-bottom: 10px; font-size: 1.1rem; }
.woven-callout p { font-size: 0.95rem; margin-bottom: 0; }

/* --- CTA Section --- */
.cta-section {
  background: linear-gradient(135deg, var(--navy-deep) 0%, var(--navy) 60%, #1e4d90 100%);
  color: #fff;
  text-align: center;
  padding: 80px 0;
}
.cta-section h2 { color: #fff; margin-bottom: 1rem; }
.cta-section p { color: rgba(255,255,255,0.8); max-width: 560px; margin: 0 auto 2rem; font-size: 1rem; }

/* --- Problem Section --- */
.problem-section { background: var(--bg); }
.problem-section h2 { margin-bottom: 1.5rem; }
.problem-section p { font-size: 1rem; }
.problem-section p + p { margin-top: 0.75rem; }

/* --- Why Cards --- */
.why-section { background: var(--bg-soft); }
.why-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 40px; }

/* --- Footer --- */
.site-footer {
  background: var(--navy-deep);
  color: rgba(255,255,255,0.65);
  padding: 48px 0 28px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: start;
  margin-bottom: 32px;
}
.footer-brand .logo-text { color: rgba(255,255,255,0.9); }
.footer-brand p { font-size: 0.85rem; margin-top: 10px; color: rgba(255,255,255,0.5); }
.footer-brand a { color: rgba(255,255,255,0.7); }
.footer-brand a:hover { color: #fff; }

.footer-nav { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-nav a {
  font-size: 0.78rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: rgba(255,255,255,0.6);
  transition: color 0.15s;
}
.footer-nav a:hover { color: #fff; text-decoration: none; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom p { font-size: 0.78rem; color: rgba(255,255,255,0.4); margin: 0; }

/* --- About Founder --- */
.founder-section { background: var(--bg-soft); }
.founder-block {
  display: flex;
  gap: 48px;
  align-items: flex-start;
}
.founder-photo {
  flex-shrink: 0;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid #fff;
  box-shadow: var(--shadow-md);
}
.founder-photo img { width: 100%; height: 100%; object-fit: cover; }
.founder-info { flex: 1; }
.founder-info h3 { font-size: 1.4rem; color: var(--text); margin-bottom: 4px; }
.founder-info .founder-title { color: var(--blue); font-weight: 600; font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.07em; margin-bottom: 0; }

/* --- About stats --- */
.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin: 40px 0;
  text-align: center;
}
.about-stat { padding: 28px 20px; background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow); }
.about-stat .stat-num { font-size: 2.2rem; }
.about-stat .stat-label { font-size: 0.78rem; }

/* --- Expertise list --- */
.expertise-panel {
  background: var(--bg-soft);
  border-radius: var(--radius-lg);
  padding: 32px 36px;
  border: 1px solid var(--border);
}
.expertise-list { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 24px; margin-top: 16px; }
.expertise-list li {
  padding-left: 1.5em;
  position: relative;
  font-size: 0.93rem;
}
.expertise-list li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--blue);
  font-weight: 700;
  font-size: 1.1em;
}

/* --- Contact Form --- */
.contact-form-section {
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-blue) 60%, #dde8f8 100%);
  padding: 80px 0;
}
.contact-grid { display: grid; grid-template-columns: 1fr 2fr; gap: 60px; align-items: start; }
.contact-info h2 { margin-bottom: 1rem; }
.contact-info .email-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--blue);
  margin: 16px 0;
}
.contact-info .email-link svg { width: 18px; height: 18px; stroke: var(--blue); fill: none; }

.contact-form {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
  letter-spacing: 0.02em;
}
.form-group label .optional {
  font-weight: 400;
  color: var(--muted);
  font-size: 0.78rem;
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 0.92rem;
  color: var(--text);
  background: #fff;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(32,86,176,0.1);
}
.form-group textarea { resize: vertical; min-height: 130px; }
.form-success {
  display: none;
  background: #eefaf3;
  border: 1px solid #a3d9b5;
  border-radius: var(--radius);
  padding: 14px 18px;
  color: #1a6b3a;
  font-size: 0.9rem;
  margin-top: 12px;
}

/* --- What Happens Next --- */
.next-steps {
  background: var(--bg-soft);
  padding: 64px 0;
}
.next-steps h2 { margin-bottom: 1.2rem; }

/* --- Model Sub Nav --- */
.model-subnav {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 68px;
  z-index: 900;
}
.model-subnav-inner {
  display: flex;
  gap: 0;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
  overflow-x: auto;
}
.model-subnav a {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--muted);
  padding: 14px 18px;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.model-subnav a:hover { color: var(--blue); border-bottom-color: var(--blue); text-decoration: none; }

/* --- Services section --- */
.full-model-block {
  background: var(--bg-blue);
  border-radius: var(--radius-lg);
  padding: 40px 44px;
  border: 1px solid #c8d9f2;
  margin-bottom: 48px;
}
.full-model-block h2 { color: var(--text); margin-bottom: 1rem; }

.pricing-block {
  background: var(--bg-soft);
  border-radius: var(--radius-lg);
  padding: 36px 40px;
  border: 1px solid var(--border);
  margin-top: 48px;
}

/* --- Misc utilities --- */
.divider { border: none; border-top: 1px solid var(--border); margin: 40px 0; }
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mt-5 { margin-top: 48px; }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.mb-5 { margin-bottom: 48px; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .grid-4, .why-cards, .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-3, .case-study-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .expertise-list { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .founder-block { flex-direction: column; align-items: center; text-align: center; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-nav { justify-content: flex-start; }
}

@media (max-width: 768px) {
  .site-nav, .header-cta { display: none; }
  .nav-toggle { display: flex; }

  /* Mobile dropdown: nav links and the CTA both live in one absolutely
     positioned panel so the "Let's Talk" button is always reachable. */
  .site-nav.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0; right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 12px 24px 14px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    gap: 0;
    z-index: 999;
  }
  .site-nav.mobile-open a {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.85rem;
    border-radius: 0;
  }
  .site-nav.mobile-open a:last-child { border-bottom: none; }
  .header-cta.mobile-open {
    display: block;
    position: absolute;
    /* Sits directly below the open nav panel, in normal stacking, so it is
       never covered and stays tappable. */
    top: calc(68px + var(--mobile-nav-h, 232px));
    left: 0; right: 0;
    background: #fff;
    padding: 14px 24px 20px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    margin-left: 0;
    border-bottom: 1px solid var(--border);
    z-index: 1000;
  }
  .header-cta.mobile-open .btn { width: 100%; text-align: center; justify-content: center; }

  .grid-2 { grid-template-columns: 1fr; }
  .grid-4, .why-cards, .stats-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: 1fr; }
  .infographic-steps { flex-direction: column; gap: 16px; }
  .infographic-connector { display: none; }
  .infographic-tracks { flex-direction: column; align-items: center; }

  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.45rem; }

  .btn-group { flex-direction: column; align-items: flex-start; }
  .btn { width: 100%; text-align: center; }

  .full-model-block { padding: 28px 24px; }
  .pricing-block { padding: 28px 24px; }
  .contact-form { padding: 24px 20px; }
  .expertise-panel { padding: 24px 20px; }

  .model-subnav-inner { gap: 0; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .section { padding: 56px 0; }
  .page-hero { padding: 48px 0 40px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}