/* ── Variables ─────────────────────────────────────────────────────────── */
:root {
  --blue:        #1d4ed8;
  --blue-hover:  #1e40af;
  --blue-pale:   #eff6ff;
  --blue-light:  #dbeafe;
  --dark:        #0f172a;
  --mid:         #334155;
  --gray:        #64748b;
  --light:       #94a3b8;
  --border:      #e2e8f0;
  --bg:          #f8fafc;
  --white:       #ffffff;
  --green:       #16a34a;
  --amber:       #d97706;
  --radius:      8px;
  --radius-lg:   12px;
  --shadow-sm:   0 1px 3px rgba(0,0,0,.06);
  --shadow:      0 2px 8px rgba(0,0,0,.08), 0 1px 3px rgba(0,0,0,.04);
  --shadow-hover:0 8px 24px rgba(0,0,0,.12), 0 2px 8px rgba(0,0,0,.06);
  --font:        -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Helvetica, Arial, sans-serif;
  --max-w:       1200px;
  --nav-h:       64px;
}

/* ── Reset ─────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  color: var(--dark);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ── Typography ────────────────────────────────────────────────────────── */
h1, h2, h3, h4 { line-height: 1.2; font-weight: 700; letter-spacing: -0.02em; }
h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); }
h3 { font-size: 1.25rem; font-weight: 600; }
h4 { font-size: 1rem; font-weight: 600; }
p  { color: var(--mid); }

/* ── Layout helpers ────────────────────────────────────────────────────── */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.section   { padding: 88px 0; }
.section--alt { background: var(--bg); }
.section-tag {
  display: inline-block;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--blue);
  background: var(--blue-pale);
  padding: 4px 12px;
  border-radius: 100px;
  margin-bottom: 16px;
}
.section-header { max-width: 640px; margin-bottom: 56px; }
.section-header h2 { margin-bottom: 12px; }
.section-header p  { font-size: 1.0625rem; }
.section-header--center { text-align: center; margin-left: auto; margin-right: auto; }

/* ── Buttons ───────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font);
  font-size: .9375rem;
  font-weight: 600;
  border-radius: var(--radius);
  padding: 11px 22px;
  cursor: pointer;
  border: none;
  transition: background .15s, box-shadow .15s, transform .1s;
  white-space: nowrap;
}
.btn:active { transform: scale(.98); }
.btn-primary {
  background: var(--blue);
  color: var(--white);
}
.btn-primary:hover { background: var(--blue-hover); box-shadow: 0 4px 12px rgba(29,78,216,.35); }
.btn-outline {
  background: transparent;
  color: var(--blue);
  border: 1.5px solid var(--blue);
}
.btn-outline:hover { background: var(--blue-pale); }
.btn-ghost {
  background: transparent;
  color: var(--mid);
  border: 1.5px solid var(--border);
}
.btn-ghost:hover { background: var(--bg); }

/* ── Navigation ────────────────────────────────────────────────────────── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: var(--nav-h);
}
.nav-inner {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 8px;
}
.nav-logo {
  font-size: 1.1875rem;
  font-weight: 800;
  color: var(--dark);
  letter-spacing: -.04em;
  flex-shrink: 0;
}
.nav-logo span { color: var(--blue); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: 32px;
  flex: 1;
}
.nav-item { position: relative; }
.nav-item > a, .nav-item > button {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  font-size: .9rem;
  font-weight: 500;
  color: var(--mid);
  background: none;
  border: none;
  cursor: pointer;
  border-radius: var(--radius);
  font-family: var(--font);
  transition: color .15s, background .15s;
}
.nav-item > a:hover, .nav-item > button:hover {
  color: var(--dark);
  background: var(--bg);
}
.nav-caret {
  width: 12px; height: 12px;
  transition: transform .2s;
}
.nav-item.open > button .nav-caret { transform: rotate(180deg); }
.dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-hover);
  min-width: 220px;
  padding: 8px;
  z-index: 100;
}
.nav-item.open .dropdown { display: block; }
.dropdown a {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius);
  transition: background .15s;
}
.dropdown a:hover { background: var(--bg); }
.dropdown-icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--blue-pale);
  border-radius: 6px;
  color: var(--blue);
}
.dropdown-icon svg { width: 16px; height: 16px; }
.dropdown-text strong {
  display: block;
  font-size: .875rem;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 2px;
}
.dropdown-text span {
  font-size: .8125rem;
  color: var(--gray);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}
.nav-hamburger {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: var(--radius);
  color: var(--dark);
}
.nav-hamburger:hover { background: var(--bg); }
.nav-mobile {
  display: none;
  background: var(--white);
  border-top: 1px solid var(--border);
  padding: 16px 0;
}
.nav-mobile.open { display: block; }
.nav-mobile a, .nav-mobile .mobile-group-header {
  display: block;
  padding: 10px 24px;
  font-size: .9375rem;
  color: var(--mid);
  font-weight: 500;
}
.nav-mobile a:hover { color: var(--dark); background: var(--bg); }
.mobile-group-header { font-weight: 700; font-size: .8125rem; text-transform: uppercase; letter-spacing: .08em; color: var(--light); margin-top: 8px; }
.nav-mobile .btn { margin: 12px 24px 4px; display: block; text-align: center; }

/* ── Hero ──────────────────────────────────────────────────────────────── */
.hero {
  padding: 96px 0 80px;
  background: linear-gradient(160deg, var(--white) 60%, var(--blue-pale) 100%);
}
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-photo {
  width: 100%;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(15,23,42,.18), 0 4px 16px rgba(15,23,42,.08);
  aspect-ratio: 4 / 3;
}
.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  display: block;
}

/* ── Illustration panels ───────────────────────────────────────────────── */
.illus-panel {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
  border: 1px solid var(--border);
  background: var(--white);
}
.illus-panel img { width: 100%; height: auto; display: block; }
.illus-phone {
  max-width: 280px;
  margin: 0 auto;
  border-radius: 28px;
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(15,23,42,.28), 0 2px 8px rgba(15,23,42,.12);
  border: 6px solid #1e293b;
}
.illus-phone img { width: 100%; display: block; }

/* ── Two-up screenshot pair ────────────────────────────────────────────── */
.screenshot-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}
.screenshot-pair .illus-phone:first-child {
  margin-top: 40px;
}
@media (max-width: 600px) {
  .screenshot-pair { grid-template-columns: 1fr; }
  .screenshot-pair .illus-phone:first-child { margin-top: 0; }
}

/* ── Feature with visual ───────────────────────────────────────────────── */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.feature-row--flip { direction: rtl; }
.feature-row--flip > * { direction: ltr; }
.hero-tag { margin-bottom: 20px; }
.hero h1 { margin-bottom: 20px; }
.hero-sub {
  font-size: 1.125rem;
  line-height: 1.7;
  max-width: 520px;
  margin-bottom: 36px;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats {
  display: flex;
  gap: 0;
  flex-wrap: wrap;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--white);
  overflow: hidden;
  display: inline-flex;
  box-shadow: var(--shadow-sm);
}
.stat-pill {
  padding: 16px 24px;
  text-align: center;
  border-right: 1px solid var(--border);
}
.stat-pill:last-child { border-right: none; }
.stat-pill strong {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--blue);
  line-height: 1;
  margin-bottom: 4px;
}
.stat-pill span { font-size: .75rem; font-weight: 500; color: var(--gray); white-space: nowrap; }

/* ── Cards grid ────────────────────────────────────────────────────────── */
.cards-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 24px; }
.cards-grid--3 { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }

.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: box-shadow .2s, transform .2s;
}
.card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--blue-pale);
  border-radius: 10px;
  color: var(--blue);
  margin-bottom: 16px;
}
.card-icon svg { width: 24px; height: 24px; }
.card h3 { margin-bottom: 8px; }
.card p { font-size: .9375rem; }
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .875rem;
  font-weight: 600;
  color: var(--blue);
  margin-top: 20px;
  transition: gap .15s;
}
.card-link:hover { gap: 10px; }

/* ── Solution cards ────────────────────────────────────────────────────── */
.solution-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: flex;
  flex-direction: column;
  transition: box-shadow .2s, transform .2s;
}
.solution-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.solution-badge {
  display: inline-block;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 20px;
}
.solution-card h3 { font-size: 1.375rem; margin-bottom: 12px; }
.solution-card p { font-size: .9375rem; flex: 1; margin-bottom: 24px; }
.solution-features { margin-bottom: 28px; }
.solution-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: .875rem;
  color: var(--mid);
  padding: 5px 0;
}
.solution-features li::before {
  content: '';
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  margin-top: 2px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%231d4ed8'%3E%3Cpath fill-rule='evenodd' d='M16.704 4.153a.75.75 0 01.143 1.052l-8 10.5a.75.75 0 01-1.127.075l-4.5-4.5a.75.75 0 011.06-1.06l3.894 3.893 7.48-9.817a.75.75 0 011.05-.143z'/%3E%3C/svg%3E") center/contain no-repeat;
}

/* ── Differentiators / Why ─────────────────────────────────────────────── */
.why-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 32px; }
.why-item { display: flex; gap: 20px; }
.why-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--blue-pale);
  border-radius: 10px;
  color: var(--blue);
  margin-top: 2px;
}
.why-icon svg { width: 22px; height: 22px; }
.why-text h4 { margin-bottom: 6px; }
.why-text p { font-size: .9rem; }

/* ── Proof / Social ────────────────────────────────────────────────────── */
.proof-strip {
  display: flex;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
}
.proof-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.proof-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(22,163,74,.15);
  flex-shrink: 0;
}
.proof-item strong { font-size: .9375rem; color: var(--dark); }
.proof-item span   { font-size: .8125rem; color: var(--gray); }
.proof-label { font-size: .8125rem; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; color: var(--light); }

/* ── Page hero (inner pages) ───────────────────────────────────────────── */
.page-hero {
  padding: 72px 0 64px;
  background: linear-gradient(160deg, var(--white) 50%, var(--blue-pale) 100%);
  border-bottom: 1px solid var(--border);
}
.page-hero-tag { margin-bottom: 16px; }
.page-hero h1 { margin-bottom: 16px; max-width: 700px; }
.page-hero p  { font-size: 1.0625rem; max-width: 600px; margin-bottom: 32px; }

/* ── How it works ──────────────────────────────────────────────────────── */
.steps { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 0; }
.step {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 32px;
  border-right: 1px solid var(--border);
  position: relative;
}
.step:last-child { border-right: none; }
.step-num {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--blue);
  color: var(--white);
  font-size: .875rem;
  font-weight: 800;
  border-radius: 50%;
  margin-bottom: 16px;
}
.step h3 { margin-bottom: 8px; }
.step p   { font-size: .9rem; }

/* ── Capabilities list ─────────────────────────────────────────────────── */
.cap-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; }
.cap-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: .9rem;
  font-weight: 500;
  color: var(--mid);
}
.cap-item::before {
  content: '';
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%231d4ed8'%3E%3Cpath fill-rule='evenodd' d='M16.704 4.153a.75.75 0 01.143 1.052l-8 10.5a.75.75 0 01-1.127.075l-4.5-4.5a.75.75 0 011.06-1.06l3.894 3.893 7.48-9.817a.75.75 0 011.05-.143z'/%3E%3C/svg%3E") center/contain no-repeat;
}

/* ── CTA Banner ────────────────────────────────────────────────────────── */
.cta-banner {
  background: var(--dark);
  color: var(--white);
  padding: 80px 0;
  text-align: center;
}
.cta-banner h2 { color: var(--white); margin-bottom: 16px; }
.cta-banner p  { color: var(--light); font-size: 1.0625rem; margin-bottom: 36px; max-width: 500px; margin-left: auto; margin-right: auto; }
.cta-banner .btn-primary { background: var(--white); color: var(--blue); }
.cta-banner .btn-primary:hover { background: var(--blue-pale); }
.cta-banner .btn-ghost { border-color: rgba(255,255,255,.25); color: rgba(255,255,255,.8); }
.cta-banner .btn-ghost:hover { background: rgba(255,255,255,.1); }
.cta-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ── Contact form ──────────────────────────────────────────────────────── */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.contact-info h2 { margin-bottom: 16px; }
.contact-info p  { margin-bottom: 24px; }
.contact-detail { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; font-size: .9375rem; }
.contact-detail svg { width: 20px; height: 20px; color: var(--blue); flex-shrink: 0; }

.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: .875rem; font-weight: 600; color: var(--dark); margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 10px 14px;
  font-family: var(--font);
  font-size: .9375rem;
  color: var(--dark);
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(29,78,216,.12);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ── Footer ────────────────────────────────────────────────────────────── */
.site-footer {
  background: var(--dark);
  color: rgba(255,255,255,.6);
  padding: 64px 0 32px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-brand .nav-logo { color: var(--white); margin-bottom: 12px; }
.footer-brand p { font-size: .875rem; line-height: 1.7; max-width: 260px; }
.footer-col h4 { color: var(--white); font-size: .875rem; font-weight: 700; margin-bottom: 16px; }
.footer-col a {
  display: block;
  font-size: .875rem;
  color: rgba(255,255,255,.55);
  padding: 4px 0;
  transition: color .15s;
}
.footer-col a:hover { color: var(--white); }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,.1);
  font-size: .8125rem;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom a { color: rgba(255,255,255,.45); margin-left: 20px; }
.footer-bottom a:hover { color: rgba(255,255,255,.8); }

/* ── Breadcrumb ────────────────────────────────────────────────────────── */
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: .8125rem; color: var(--gray); margin-bottom: 16px; }
.breadcrumb a { color: var(--blue); }
.breadcrumb-sep { color: var(--light); }

/* ── About ─────────────────────────────────────────────────────────────── */
.about-story { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.about-stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 32px; }
.about-stat { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 24px; }
.about-stat strong { display: block; font-size: 2rem; font-weight: 800; color: var(--blue); margin-bottom: 4px; }
.about-stat span { font-size: .875rem; color: var(--gray); }
.about-text h2 { margin-bottom: 20px; }
.about-text p  { margin-bottom: 16px; }

/* ── Research pages ────────────────────────────────────────────────────── */
.research-intro {
  font-size: 1.125rem;
  line-height: 1.75;
  max-width: 760px;
  color: var(--mid);
  margin-bottom: 48px;
}
.stat-callouts {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 64px;
}
.stat-callout {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px 20px;
  position: relative;
}
.stat-callout::before {
  content: '';
  position: absolute;
  top: 0; left: 24px; right: 24px;
  height: 3px;
  background: var(--blue);
  border-radius: 0 0 3px 3px;
}
.stat-callout .stat-number {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--dark);
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: -.03em;
}
.stat-callout .stat-desc {
  font-size: .9375rem;
  color: var(--mid);
  margin-bottom: 12px;
  line-height: 1.5;
}
.stat-callout .stat-source {
  font-size: .75rem;
  font-weight: 600;
  color: var(--light);
  text-transform: uppercase;
  letter-spacing: .06em;
}
.stat-callout .stat-source a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.pull-quote {
  border-left: 4px solid var(--blue);
  padding: 20px 28px;
  background: var(--blue-pale);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 40px 0;
}
.pull-quote p {
  font-size: 1.125rem;
  font-style: italic;
  color: var(--dark);
  margin-bottom: 8px;
  line-height: 1.65;
}
.pull-quote cite {
  font-size: .8125rem;
  font-style: normal;
  font-weight: 600;
  color: var(--gray);
}

.research-body {
  max-width: 760px;
}
.research-body h3 {
  font-size: 1.25rem;
  margin-top: 48px;
  margin-bottom: 12px;
  color: var(--dark);
}
.research-body p {
  margin-bottom: 16px;
  line-height: 1.75;
}
.research-body p strong {
  color: var(--dark);
}

.source-list {
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.source-list h4 {
  font-size: .875rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--light);
  margin-bottom: 20px;
}
.source-list ol {
  list-style: decimal;
  padding-left: 20px;
}
.source-list li {
  font-size: .875rem;
  color: var(--gray);
  margin-bottom: 10px;
  line-height: 1.6;
}
.source-list a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 2px;
  word-break: break-all;
}

.research-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 64px;
  align-items: start;
}
.research-sidebar {
  position: sticky;
  top: calc(var(--nav-h) + 24px);
}
.sidebar-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 16px;
}
.sidebar-card h4 { margin-bottom: 12px; font-size: .9375rem; }
.sidebar-card p  { font-size: .875rem; margin-bottom: 16px; }
.sidebar-nav-list { list-style: none; }
.sidebar-nav-list li { padding: 6px 0; border-bottom: 1px solid var(--bg); }
.sidebar-nav-list li:last-child { border-bottom: none; }
.sidebar-nav-list a { font-size: .875rem; color: var(--blue); font-weight: 500; }
.sidebar-nav-list a:hover { text-decoration: underline; }

@media (max-width: 900px) {
  .research-layout { grid-template-columns: 1fr; }
  .research-sidebar { position: static; }
}

/* ── Responsive ────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .hero    { padding: 64px 0 56px; }
  .nav-links, .nav-actions { display: none; }
  .nav-hamburger { display: flex; margin-left: auto; }
  .stat-pill { padding: 12px 16px; }
  .stat-pill strong { font-size: 1.25rem; }
  .hero-stats { width: 100%; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .feature-row { grid-template-columns: 1fr; }
  .feature-row--flip { direction: ltr; }
  .step { border-right: none; border-bottom: 1px solid var(--border); }
  .step:last-child { border-bottom: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .form-row { grid-template-columns: 1fr; }
  .about-story { grid-template-columns: 1fr; gap: 40px; }
  .about-stat-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { justify-content: center; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-actions { flex-direction: column; align-items: center; }
  .proof-strip { flex-direction: column; align-items: stretch; }
  .about-stat-grid { grid-template-columns: 1fr; }
}