/* Base settings */

:root {
  --colour-primary: #3A4A5A;
  --colour-primary-soft: #4b6074;
  --colour-background: #FAFAFA;
  --colour-text: #111827;
  --colour-text-secondary: #6B7280;
  --colour-rule: #D0D0D0;
  --colour-link: #1D4ED8;
  --radius-button: 999px;
  --font-stack: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-family: var(--font-stack);
  line-height: 1.5;
  color: var(--colour-text);
  background-color: var(--colour-background);
}

body {
  margin: 0;
}

/* Layout */

.container {
  max-width: 960px;
  padding: 0 1.5rem;
  margin: 0 auto;
}

main {
  padding-bottom: 3rem;
}

.section {
  padding: 2.5rem 0;
}

.page-intro {
  padding: 2.75rem 0 2.5rem;
}

/* Typography */

h1,
h2,
h3 {
  font-weight: 500;
  color: var(--colour-primary);
  margin-top: 0;
}

h1 {
  font-size: 1.9rem;
  margin-bottom: 1rem;
}

h2 {
  font-size: 1.4rem;
  margin-bottom: 0.9rem;
}

h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

p {
  margin: 0 0 1rem;
  color: var(--colour-text);
}

.section-subheading {
  margin-top: 1.25rem;
}

ul {
  margin: 0 0 1rem 1.25rem;
  padding: 0;
}

li {
  margin-bottom: 0.35rem;
}

/* Links and buttons */

a {
  color: var(--colour-link);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover,
a:focus-visible {
  text-decoration-thickness: 2px;
}

a:visited:not(.button) {
  color: var(--colour-text-secondary);
}

a:active:not(.button) {
  color: #9CA3AF;
}

.button {
  display: inline-block;
  border-radius: var(--radius-button);
  padding: 0.6rem 1.4rem;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  line-height: 1.2;
}

.button.primary {
  background-color: var(--colour-primary);
  color: #ffffff;
}

.button.primary:hover,
.button.primary:focus-visible {
  background-color: var(--colour-primary-soft);
}

.button.secondary {
  background-color: transparent;
  border-color: var(--colour-primary);
  color: var(--colour-primary);
}

.button.secondary:hover,
.button.secondary:focus-visible {
  background-color: var(--colour-primary);
  color: #ffffff;
}

.text-link {
  text-decoration: none;
  border-bottom: 1px solid var(--colour-link);
  padding-bottom: 1px;
}

.text-link:hover,
.text-link:focus-visible {
  border-bottom-width: 2px;
}

/* Header and navigation */

.site-header {
  border-bottom: 1px solid var(--colour-rule);
  background-color: #ffffff;
}

.header-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 1rem 0;
  gap: 1.5rem;
}

.branding {
  text-align: left;
  margin-right: auto;
}

.branding-name {
  font-weight: 600;
  color: var(--colour-primary);
  font-size: 3.3rem;
}

.branding-strapline {
  font-size: 1.2rem;
  color: var(--colour-text-secondary);
  margin-top: 0.1rem;
  white-space: nowrap;
}

.branding-logo {
  display: block;
  max-width: 240px;
  height: auto;
}

/* Navigation */

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 1.5rem;
}

.site-nav a {
  text-decoration: none;
  color: var(--colour-text);
  font-size: 0.95rem;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--colour-primary);
}

.site-nav a.current {
  font-weight: 600;
  color: var(--colour-primary);
  border-bottom: 2px solid var(--colour-primary);
  padding-bottom: 0.1rem;
}

.mobile-site-item {
  display: none;
}

/* Mobile nav toggle */

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--colour-rule);
  border-radius: 4px;
  padding: 0.35rem 0.5rem;
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 1.5px;
  background-color: var(--colour-text);
  margin: 3px 0;
}

/* Hero */

.hero {
  padding: 2.75rem 0 2.5rem;
}

.hero-lead {
  font-size: 1.05rem;
  color: var(--colour-text-secondary);
  max-width: 38rem;
  margin-bottom: 1.5rem;
}

/* Structure */

.section-divider {
  border: 0;
  border-top: 1px solid var(--colour-rule);
  margin: 0;
}

/* Two-column layout */

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.1fr);
  gap: 2rem;
}

/* Case studies */

.case-study + .case-study {
  margin-top: 2.5rem;
}

.case-study-meta {
  font-size: 0.9rem;
  color: var(--colour-text-secondary);
  margin-bottom: 0.75rem;
}

.case-studies-text {
  color: #8B0000;
}

.case-studies-text p,
.case-studies-text li {
  color: inherit;
}

/* Insights */

.insight-summary + .insight-summary {
  margin-top: 3rem;
}

.insight-meta {
  font-size: 0.9rem;
  color: var(--colour-text-secondary);
  margin-bottom: 0.75rem;
}

.insight-summary a {
  color: var(--colour-text-secondary);
}

.insight-summary a:visited {
  color: #9CA3AF;
}

.insight-summary-content {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 1.25rem;
  align-items: start;
}

.insight-placeholder {
  display: block;
  width: 112px;
  height: 112px;
  border: 1px solid var(--colour-rule);
  background-color: #ffffff;
  object-fit: contain;
}

.insight-placeholder-cover {
  object-fit: cover;
}

.insight-placeholder-right {
  object-position: right center;
}

.insight-summary-content > div:last-child {
  display: flex;
  flex-direction: column;
  min-height: 112px;
}

.insight-summary-content > div:last-child p:last-child {
  margin-top: auto;
}

/* Articles */

.article-header {
  padding: 2.5rem 0 1.5rem;
  border-bottom: 1px solid var(--colour-rule);
  background-color: #ffffff;
}

.article-kicker {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--colour-text-secondary);
  margin-bottom: 0.4rem;
}

.article-meta {
  font-size: 0.9rem;
  color: var(--colour-text-secondary);
}

.article-body {
  padding: 2.25rem 0 2.75rem;
}

.article-body h2 {
  margin-top: 1.75rem;
}

/* Contact form */

.contact-form {
  margin-top: 0.5rem;
}

.contact-links a {
  color: var(--colour-text-secondary);
}

.contact-links a:visited {
  color: #9CA3AF;
}

.privacy-contact a {
  color: var(--colour-text-secondary);
}

.privacy-contact a:visited {
  color: #9CA3AF;
}

.contact-building {
  display: block;
  max-width: 97.5px;
  height: auto;
  margin: 0.75rem 0 1rem;
}

.form-group {
  margin-bottom: 1rem;
}

.hp-field {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

label {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
}

input[type="text"],
input[type="email"],
textarea {
  width: 100%;
  max-width: 100%;
  border-radius: 4px;
  border: 1px solid #D1D5DB;
  padding: 0.45rem 0.5rem;
  font-family: inherit;
  font-size: 0.95rem;
  line-height: 1.4;
  color: var(--colour-text);
  background-color: #ffffff;
}

input[type="text"]:focus-visible,
input[type="email"]:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--colour-primary);
  outline-offset: 1px;
  border-color: var(--colour-primary);
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--colour-rule);
  padding: 1.75rem 0 2rem;
  background-color: #ffffff;
  font-size: 0.9rem;
  color: var(--colour-text-secondary);
  text-align: left;
}

.footer-name {
  font-weight: 600;
  color: var(--colour-primary);
  margin-bottom: 0.25rem;
}

/* Utility */

.section-cta {
  margin-top: 1.5rem;
}

/* Skip link */

.skip-link {
  position: absolute;
  left: -999px;
  top: 0.75rem;
  padding: 0.5rem 1rem;
  background-color: #ffffff;
  color: var(--colour-text);
  border-radius: 4px;
  border: 1px solid var(--colour-rule);
  text-decoration: none;
  z-index: 1000;
}

.skip-link:focus {
  left: 0.75rem;
}

/* Responsive adjustments */

@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
    align-items: flex-start;
  }

  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    width: 100%;
    margin-top: 0.5rem;
    display: none;
  }

  .site-nav.nav-open {
    display: block;
  }

  .site-nav ul {
    flex-direction: column;
    gap: 0.5rem;
  }

  .site-nav a.current {
    border-bottom-width: 1px;
  }

  .mobile-site-item {
    display: list-item;
  }

  .two-column {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero {
    padding-top: 2.25rem;
  }

  h1 {
    font-size: 1.6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}