:root {
  --deep-blue: #1F3F6B;
  --mid-blue: #2F5C9A;
  --soft-blue: #4A78B5;
  --dark-blue: #172F52;
  --white: #FFFFFF;
  --tint-1: #E6EEF8;
  --tint-2: #EBF2FA;
  --tint-3: #F0F5FB;
  --text-secondary: #4A4A6A;
  --border: rgba(31, 63, 107, 0.19);
  --shadow: 0 16px 40px rgba(31, 63, 107, 0.12);
  --featured-shadow: 0 18px 45px rgba(74, 120, 181, 0.25);
  --radius: 12px;
  --focus: 3px solid #4A78B5;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  background: var(--tint-3);
  color: var(--deep-blue);
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--mid-blue);
  font-weight: 800;
}

a:hover {
  color: var(--deep-blue);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: var(--focus);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  top: 0.5rem;
  left: 0.5rem;
  transform: translateY(-160%);
  background: var(--white);
  color: var(--deep-blue);
  padding: 0.8rem 1rem;
  border: 3px solid var(--soft-blue);
  border-radius: 10px;
  z-index: 9999;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: linear-gradient(135deg, var(--dark-blue), var(--deep-blue));
  color: var(--white);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.header-inner {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  color: var(--white);
  text-decoration: none;
}

.brand-lockup:hover {
  color: var(--white);
}

.brand-logo {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.9);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-text strong {
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

.brand-text span {
  font-size: 0.82rem;
  font-weight: 700;
  opacity: 0.92;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.primary-nav a {
  color: var(--white);
  text-decoration: none;
  font-weight: 800;
  font-size: 0.88rem;
  padding: 0.58rem 0.62rem;
  border-radius: 10px;
}

.primary-nav a:hover,
.primary-nav a[aria-current="true"] {
  background: rgba(255, 255, 255, 0.18);
  color: var(--white);
}

.menu-toggle {
  display: none;
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.75);
  border-radius: 10px;
  padding: 0.55rem 0.7rem;
  font-weight: 800;
}

.menu-toggle__line {
  display: inline-block;
  width: 18px;
  height: 2px;
  background: var(--white);
  margin-right: 0.4rem;
  vertical-align: middle;
  box-shadow: 0 6px 0 var(--white), 0 -6px 0 var(--white);
}

.section-dark {
  background: linear-gradient(135deg, var(--dark-blue) 0%, var(--deep-blue) 60%, var(--soft-blue) 100%);
  color: var(--white);
}

.hero {
  min-height: 620px;
  display: flex;
  align-items: center;
  padding: 5rem 0;
}

.hero-grid {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
  gap: 3rem;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  color: inherit;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.82rem;
  margin: 0 0 0.7rem;
}

.hero h1,
.content-section h2,
.toc-section h2,
.site-footer h2 {
  line-height: 1.3;
  margin-top: 0;
}

.hero h1 {
  max-width: 820px;
  font-size: clamp(2.2rem, 6vw, 4.6rem);
  font-weight: 800;
  margin-bottom: 1rem;
}

.hero-lead {
  font-size: clamp(1.15rem, 2.4vw, 1.45rem);
  max-width: 760px;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.82rem 1.2rem;
  border-radius: 10px;
  border: 2px solid transparent;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
}

.button-primary {
  background: var(--white);
  color: var(--deep-blue);
}

.button-primary:hover {
  background: var(--tint-1);
  color: var(--deep-blue);
}

.button-secondary {
  border-color: var(--white);
  color: var(--white);
}

.button-secondary:hover {
  background: rgba(255,255,255,0.18);
  color: var(--white);
}

.button-disabled {
  background: #d9dee8;
  color: var(--deep-blue);
  cursor: not-allowed;
}

.proposal-card {
  width: min(100%, 360px);
  justify-self: end;
  background: linear-gradient(135deg, rgba(230, 238, 248, 0.16), rgba(255, 255, 255, 0.08));
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 18px;
  padding: 1rem;
  box-shadow: 0 18px 45px rgba(23, 47, 82, 0.28);
  backdrop-filter: blur(6px);
}

.proposal-card h2 {
  font-size: 1.08rem;
  margin: 0 0 0.75rem;
  color: var(--white);
}

.proposal-card dl {
  display: grid;
  gap: 0.58rem;
  margin: 0;
}

.proposal-card div {
  padding: 0.55rem 0.65rem;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.10);
}

.proposal-card dt {
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--tint-1);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.proposal-card dd {
  margin: 0.1rem 0 0;
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--white);
}

.container {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
}

.narrow {
  max-width: 900px;
}

.toc-section,
.content-section {
  padding: 4rem 0;
}

.alt-bg {
  background: linear-gradient(135deg, var(--tint-1), var(--tint-2));
}

.framework-section {
  background:
    radial-gradient(circle at 10% 10%, rgba(74, 120, 181, 0.16), transparent 32rem),
    var(--white);
}

.toc-section h2,
.content-section h2 {
  color: var(--deep-blue);
  font-size: clamp(1.8rem, 4vw, 2.65rem);
  font-weight: 800;
}

.toc-grid,
.download-grid,
.principles-grid,
.quality-grid {
  display: grid;
  gap: 1rem;
}

.toc-grid {
  grid-template-columns: repeat(6, 1fr);
  margin-top: 1.4rem;
}

.toc-card,
.info-card,
.principle-card,
.download-card,
.highlight-panel,
.method-card,
.quality-card,
.quality-promise,
details {
  background: var(--white);
  border: 1px solid #D1D5DB;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 0 0 rgba(31,63,107,0);
}

.toc-card {
  color: var(--deep-blue);
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.toc-card:hover,
.info-card:hover,
.principle-card:hover,
.download-card:hover,
.quality-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.toc-number,
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 32px;
  padding: 0.2rem 0.65rem;
  border-radius: 20px;
  background: var(--tint-1);
  border: 2px solid var(--deep-blue);
  color: var(--deep-blue);
  font-weight: 800;
  font-size: 0.9rem;
}

.toc-title {
  display: block;
  margin-top: 1rem;
  font-size: 1.02rem;
  font-weight: 800;
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
  gap: 2rem;
  align-items: start;
}

.statement {
  font-size: 1.3rem;
  font-weight: 800;
  padding: 1rem 1.2rem;
  border-left: 6px solid var(--mid-blue);
  background: var(--white);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.card-stack {
  display: grid;
  gap: 1rem;
}

.info-card h3,
.principle-card h3,
.download-card h3,
.highlight-panel h3,
.method-card h3,
.quality-card h3,
.quality-promise h3 {
  margin-top: 0;
  color: var(--deep-blue);
  font-size: 1.25rem;
  font-weight: 800;
}

.highlight-panel {
  margin-top: 2rem;
  background: var(--tint-1);
  border-color: var(--border);
}

.principles-grid {
  grid-template-columns: repeat(3, 1fr);
  margin-top: 2rem;
}

.framework-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  gap: 2rem;
  align-items: start;
  margin-top: 2rem;
}

.framework-visual {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1rem;
  box-shadow: var(--shadow);
}

.framework-visual svg {
  display: block;
  width: 100%;
  height: auto;
}

.framework-copy {
  display: grid;
  gap: 1rem;
}

.accordion {
  display: grid;
  gap: 0.75rem;
}

details {
  padding: 0;
  overflow: hidden;
}

summary {
  cursor: pointer;
  padding: 1rem 1.2rem;
  font-weight: 800;
  color: var(--deep-blue);
  background: var(--tint-1);
}

summary::marker {
  color: var(--mid-blue);
}

details p {
  margin: 0;
  padding: 1rem 1.2rem 1.2rem;
}

.quality-grid {
  grid-template-columns: repeat(5, 1fr);
  align-items: stretch;
  margin-top: 2rem;
}

.quality-card {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.quality-card-feature {
  background: linear-gradient(135deg, var(--white), var(--tint-1));
  border-color: var(--deep-blue);
}

.quality-promise {
  margin-top: 2rem;
  background: var(--deep-blue);
  color: var(--white);
  border-color: var(--deep-blue);
}

.quality-promise h3 {
  color: var(--white);
}

.download-grid {
  grid-template-columns: repeat(3, 1fr);
  margin-top: 1.5rem;
}


.delivery-principles {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.timeline {
  position: relative;
  display: grid;
  gap: 1rem;
  margin: 2.5rem 0;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 25px;
  top: 20px;
  bottom: 20px;
  width: 4px;
  background: var(--mid-blue);
  border-radius: 999px;
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 1rem;
  align-items: start;
  background: var(--white);
  border: 1px solid #D1D5DB;
  border-radius: var(--radius);
  padding: 1.2rem;
  box-shadow: var(--shadow);
}

.timeline-marker {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  border-radius: 999px;
  background: var(--deep-blue);
  color: var(--white);
  font-weight: 800;
  border: 4px solid var(--tint-1);
}

.timeline-item h3,
.governance-card h3,
.table-wrap h3 {
  margin-top: 0;
  color: var(--deep-blue);
  font-weight: 800;
}

.table-wrap {
  overflow-x: auto;
  background: var(--white);
  border: 1px solid #D1D5DB;
  border-radius: var(--radius);
  padding: 1.2rem;
  box-shadow: var(--shadow);
}

.risk-table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  color: var(--deep-blue);
}

.risk-table th,
.risk-table td {
  text-align: left;
  vertical-align: top;
  padding: 1rem;
  border-bottom: 1px solid var(--border);
}

.risk-table th {
  background: var(--deep-blue);
  color: var(--white);
  font-weight: 800;
}

.risk-table tbody tr:nth-child(even) {
  background: var(--tint-2);
}

.risk-label {
  display: inline-block;
  margin-right: 0.35rem;
  padding: 0.18rem 0.55rem;
  border-radius: 20px;
  border: 2px solid var(--deep-blue);
  background: var(--tint-1);
  color: var(--deep-blue);
  font-size: 0.82rem;
  font-weight: 800;
}

.governance-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.governance-card {
  background: var(--white);
  border: 1px solid #D1D5DB;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 0 0 rgba(31,63,107,0);
}

.governance-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.engagement-model {
  margin: 2.5rem 0;
  background: var(--white);
  border: 1px solid #D1D5DB;
  border-radius: 18px;
  padding: 2rem;
  box-shadow: var(--shadow);
}

.engagement-centre {
  max-width: 360px;
  margin: 0 auto 1.5rem;
  text-align: center;
  background: linear-gradient(135deg, var(--dark-blue), var(--deep-blue));
  color: var(--white);
  border-radius: 18px;
  padding: 1.5rem;
}

.engagement-centre h3 {
  color: var(--white);
  margin-top: 0;
}

.engagement-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.engagement-list li {
  border: 2px solid var(--deep-blue);
  border-radius: 999px;
  background: var(--tint-1);
  padding: 0.8rem 1rem;
  text-align: center;
  font-weight: 800;
}


.case-study-grid,
.difference-grid {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.case-study-grid {
  grid-template-columns: repeat(3, 1fr);
}

.difference-grid {
  grid-template-columns: repeat(3, 1fr);
}

.case-card,
.difference-card {
  background: var(--white);
  border: 1px solid #D1D5DB;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 0 0 rgba(31,63,107,0);
}

.case-card:hover,
.difference-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.case-card h3,
.difference-card h3 {
  margin-top: 0;
  color: var(--deep-blue);
  font-size: 1.25rem;
  font-weight: 800;
}

.case-label {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  margin: 0 0 0.9rem;
  padding: 0.2rem 0.7rem;
  border-radius: 20px;
  border: 2px solid var(--deep-blue);
  background: var(--tint-1);
  color: var(--deep-blue);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.case-card details {
  margin-top: 1rem;
  border-color: var(--border);
}

.case-card-feature {
  background: linear-gradient(135deg, var(--tint-1), var(--white));
  border-color: var(--deep-blue);
}

.case-card-feature ul {
  margin: 0;
  padding-left: 1.2rem;
  font-weight: 700;
}

.value-strip {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.value-strip div {
  background: var(--white);
  padding: 1.4rem;
  border-right: 1px solid var(--border);
}

.value-strip div:last-child {
  border-right: 0;
}

.value-strip strong {
  display: block;
  color: var(--deep-blue);
  font-size: 1.12rem;
  font-weight: 800;
  margin-bottom: 0.4rem;
}

.value-strip span {
  color: var(--deep-blue);
}

.founder-note {
  margin: 2rem 0 0;
  padding: 2rem;
  background: linear-gradient(135deg, var(--dark-blue), var(--deep-blue));
  color: var(--white);
  border-radius: 18px;
  box-shadow: var(--featured-shadow);
}

.founder-note blockquote {
  margin: 0;
  font-size: 1.35rem;
  line-height: 1.5;
  font-weight: 800;
}

.founder-note figcaption {
  margin-top: 1.2rem;
  color: var(--white);
}

.site-footer {
  background: linear-gradient(135deg, var(--dark-blue), var(--deep-blue));
  color: var(--white);
  padding: 3rem 0;
}

.site-footer a {
  color: var(--white);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1.5fr;
  gap: 2rem;
}

.footer-logo {
  width: 76px;
  height: 76px;
  border-radius: 50%;
  background: var(--white);
  border: 2px solid var(--white);
}

.site-footer h2 {
  font-size: 1.1rem;
  color: var(--white);
}

.back-to-top {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  width: 48px;
  height: 48px;
  border-radius: 999px;
  border: 2px solid var(--white);
  background: var(--mid-blue);
  color: var(--white);
  font-size: 1.2rem;
  font-weight: 800;
  box-shadow: var(--shadow);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms ease;
}

.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
}

@media (max-width: 1100px) {
  .toc-grid,
  .quality-grid,
  .delivery-principles,
  .governance-grid,
  .engagement-list,
  .case-study-grid,
  .difference-grid,
  .value-strip {
    grid-template-columns: repeat(3, 1fr);
  }

  .primary-nav a {
    font-size: 0.82rem;
    padding-inline: 0.5rem;
  }
}

@media (max-width: 900px) {
  .menu-toggle {
    display: inline-flex;
    align-items: center;
  }

  .primary-nav {
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    background: var(--deep-blue);
    padding: 0.6rem 1rem 1rem;
  }

  .primary-nav.is-open {
    display: flex;
  }

  .primary-nav a {
    padding: 0.9rem 1rem;
  }

  .hero-grid,
  .two-column,
  .footer-grid,
  .framework-layout {
    grid-template-columns: 1fr;
  }

  .toc-grid,
  .principles-grid,
  .download-grid,
  .quality-grid,
  .delivery-principles,
  .governance-grid,
  .engagement-list,
  .case-study-grid,
  .difference-grid,
  .value-strip {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding: 4rem 0;
  }
}

@media (max-width: 520px) {
  .brand-text span {
    display: none;
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .content-section,
  .toc-section {
    padding: 3rem 0;
  }

  .framework-visual {
    padding: 0.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
}

@media (max-width: 900px) {
  .value-strip div {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .value-strip div:last-child {
    border-bottom: 0;
  }
}

.button-link {
  background: var(--mid-blue);
  color: var(--white);
  margin: 0.35rem 0.35rem 0 0;
}
.button-link:hover {
  background: var(--deep-blue);
  color: var(--white);
}
.button-link-secondary {
  background: var(--white);
  color: var(--deep-blue);
  border-color: var(--deep-blue);
  margin: 0.35rem 0.35rem 0 0;
}
.button-link-secondary:hover {
  background: var(--tint-1);
  color: var(--deep-blue);
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1rem;
}
.button-link {
  background: var(--mid-blue);
  color: var(--white);
}
.button-link:hover {
  background: var(--deep-blue);
  color: var(--white);
}


@media (max-width: 900px) {
  .proposal-card {
    justify-self: stretch;
    width: 100%;
  }
}