/* ==========================================================================
   PathFi — main stylesheet
   Mobile-first, system fonts, no external resources.
   ========================================================================== */

:root {
  /* Colour */
  --colour-navy: #0F2A44;
  --colour-navy-soft: #1D3B5A;
  --colour-text: #1A2733;
  --colour-text-muted: #4A5A69;
  --colour-teal: #0B6E6D;
  --colour-teal-dark: #08514F;
  --colour-teal-bright: #3CC4B4;
  --colour-teal-tint: #E7F4F2;
  --colour-bg: #FFFFFF;
  --colour-bg-tint: #F5F8FA;
  --colour-border: #DCE3E9;
  --colour-border-strong: #C3CED8;
  --colour-control-border: #7D8E9E;
  --colour-focus: #0B6E6D;
  --colour-on-dark: #FFFFFF;
  --colour-on-dark-muted: #C9D6E2;

  /* Typography */
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --text-sm: 0.9375rem;
  --text-base: 1.0625rem;
  --text-lg: 1.1875rem;
  --text-h3: 1.1875rem;
  --text-h2: clamp(1.625rem, 1.25rem + 1.6vw, 2.25rem);
  --text-h1: clamp(2.125rem, 1.5rem + 3vw, 3.5rem);
  --leading: 1.6;
  --leading-tight: 1.2;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;

  /* Shape and depth */
  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 18px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(15, 42, 68, 0.06);

  /* Layout */
  --container: 72rem;
  --container-narrow: 46rem;
  --gutter: 1.25rem;
  --header-height: 4.25rem;
  --transition: 180ms ease;
}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-height) + var(--space-4));
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading);
  color: var(--colour-text);
  background: var(--colour-bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

h1,
h2,
h3 {
  color: var(--colour-navy);
  line-height: var(--leading-tight);
  letter-spacing: -0.015em;
  margin: 0 0 var(--space-4);
  overflow-wrap: break-word;
}

h1 { font-size: var(--text-h1); letter-spacing: -0.025em; }
h2 { font-size: var(--text-h2); }
h3 { font-size: var(--text-h3); }

p {
  margin: 0 0 var(--space-4);
  max-width: 68ch;
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--colour-teal);
  text-underline-offset: 0.2em;
  text-decoration-thickness: 1px;
}

a:hover {
  color: var(--colour-teal-dark);
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 3px solid var(--colour-focus);
  outline-offset: 3px;
  border-radius: 4px;
}

main:focus {
  outline: none;
}

ul,
ol {
  margin: 0;
  padding: 0;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.narrow {
  max-width: var(--container-narrow);
}

/* --------------------------------------------------------------------------
   Skip link
   -------------------------------------------------------------------------- */

.skip-link {
  position: absolute;
  top: var(--space-2);
  left: var(--space-2);
  z-index: 100;
  padding: var(--space-3) var(--space-4);
  background: var(--colour-navy);
  color: var(--colour-on-dark);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: translateY(0);
  color: var(--colour-on-dark);
}

/* --------------------------------------------------------------------------
   Header and navigation
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--colour-bg);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.site-header.is-scrolled {
  border-bottom-color: var(--colour-border);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3) var(--space-4);
  min-height: var(--header-height);
  padding-block: var(--space-3);
}

.brand {
  display: inline-flex;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
}

.brand img {
  width: 138px;
  height: 32px;
}

/* Without JavaScript: navigation is always visible and wraps beneath the logo */
.site-nav {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.nav-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-2);
}

.nav-list a {
  display: inline-block;
  padding: var(--space-2) var(--space-2);
  color: var(--colour-navy);
  font-weight: 500;
  font-size: var(--text-sm);
  text-decoration: none;
  border-radius: var(--radius-sm);
}

.nav-list a:hover {
  color: var(--colour-teal);
  background: var(--colour-teal-tint);
}

.header-cta {
  align-self: flex-start;
}

/* Mobile toggle: only shown once JavaScript is available */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 11px;
  background: transparent;
  border: 1px solid var(--colour-control-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--colour-navy);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 63.9375em) {
  .js .nav-toggle {
    display: inline-flex;
  }

  .js .site-nav {
    display: none;
    padding: var(--space-3) 0 var(--space-4);
    border-top: 1px solid var(--colour-border);
  }

  .js .site-nav.is-open {
    display: flex;
  }

  .js .nav-list {
    flex-direction: column;
    gap: 0;
  }

  .js .nav-list a {
    display: block;
    padding: var(--space-3) var(--space-2);
    font-size: var(--text-base);
  }
}

@media (min-width: 64em) {
  .header-inner {
    flex-wrap: nowrap;
  }

  .site-nav {
    width: auto;
    flex-direction: row;
    align-items: center;
    gap: var(--space-4);
  }

  .header-cta {
    align-self: center;
  }
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: var(--space-3) var(--space-5);
  font: inherit;
  font-weight: 600;
  line-height: 1.25;
  text-align: center;
  text-decoration: none;
  color: var(--colour-on-dark);
  background: var(--colour-navy);
  border: 2px solid var(--colour-navy);
  border-radius: var(--radius-pill);
  transition: background-color var(--transition), border-color var(--transition), color var(--transition);
}

.button:hover {
  color: var(--colour-on-dark);
  background: var(--colour-navy-soft);
  border-color: var(--colour-navy-soft);
  text-decoration: none;
}

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

.button-secondary:hover {
  color: var(--colour-navy);
  background: var(--colour-bg-tint);
  border-color: var(--colour-navy);
}

.button-small {
  min-height: 40px;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
}

.button-on-dark {
  color: var(--colour-navy);
  background: var(--colour-on-dark);
  border-color: var(--colour-on-dark);
}

.button-on-dark:hover {
  color: var(--colour-navy);
  background: var(--colour-teal-tint);
  border-color: var(--colour-teal-tint);
}

.button-on-dark:focus-visible {
  outline-color: var(--colour-on-dark);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.button-row-centre {
  justify-content: center;
}

/* --------------------------------------------------------------------------
   Shared section styles
   -------------------------------------------------------------------------- */

.section {
  padding-block: var(--space-8);
}

.section-tinted {
  background: var(--colour-bg-tint);
  border-block: 1px solid var(--colour-border);
}

.section-intro {
  max-width: var(--container-narrow);
  margin-bottom: var(--space-6);
}

.eyebrow {
  margin-bottom: var(--space-3);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--colour-teal);
}

.lead {
  font-size: var(--text-lg);
  color: var(--colour-text-muted);
}

.muted {
  color: var(--colour-text-muted);
  font-size: var(--text-sm);
}

.emphasis {
  padding-left: var(--space-4);
  border-left: 3px solid var(--colour-teal);
  color: var(--colour-navy);
  font-weight: 600;
}

.section-outro {
  margin-top: var(--space-6);
  color: var(--colour-text-muted);
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.hero {
  padding-block: var(--space-7) var(--space-8);
  border-bottom: 1px solid var(--colour-border);
}

.hero-grid {
  display: grid;
  gap: var(--space-7);
  align-items: center;
}

.hero-copy h1 {
  max-width: 14ch;
}

.pathway-card {
  padding: var(--space-5);
  background: var(--colour-bg-tint);
  border: 1px solid var(--colour-border);
  border-radius: var(--radius-lg);
}

.pathway-label {
  margin-bottom: var(--space-4);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--colour-text-muted);
}

.pathway {
  list-style: none;
  position: relative;
  display: grid;
  gap: var(--space-3);
}

.pathway::before {
  content: "";
  position: absolute;
  top: 1.25rem;
  bottom: 1.25rem;
  left: 1.25rem;
  width: 2px;
  margin-left: -1px;
  background: repeating-linear-gradient(to bottom, var(--colour-teal-bright) 0 6px, transparent 6px 11px);
}

.pathway-stage {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-2) var(--space-4) var(--space-2) 0;
}

.pathway-node {
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: var(--colour-bg);
  border: 2px solid var(--colour-border-strong);
  position: relative;
  z-index: 1;
}

.pathway-node::after {
  content: "";
  position: absolute;
  inset: 0.6rem;
  border-radius: 50%;
  background: var(--colour-border-strong);
}

.pathway-stage:first-child .pathway-node {
  border-color: var(--colour-navy);
}

.pathway-stage:first-child .pathway-node::after {
  background: var(--colour-navy);
}

.pathway-stage:nth-child(2) .pathway-node,
.pathway-stage:nth-child(3) .pathway-node {
  border-color: var(--colour-teal);
}

.pathway-stage:nth-child(2) .pathway-node::after,
.pathway-stage:nth-child(3) .pathway-node::after {
  background: var(--colour-teal);
}

.pathway-text {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  background: var(--colour-bg);
  border: 1px solid var(--colour-border);
  border-radius: var(--radius);
  font-weight: 600;
  color: var(--colour-navy);
  box-shadow: var(--shadow-sm);
}

@media (min-width: 56em) {
  .hero {
    padding-block: var(--space-9);
  }

  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: var(--space-8);
  }

  .pathway-card {
    padding: var(--space-6);
  }

  .pathway-stage:nth-child(2) { margin-left: var(--space-5); }
  .pathway-stage:nth-child(3) { margin-left: var(--space-6); }
  .pathway-stage:nth-child(4) { margin-left: var(--space-5); }

  .pathway::before {
    display: none;
  }
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */

.card-grid {
  list-style: none;
  display: grid;
  gap: var(--space-4);
}

.card {
  padding: var(--space-5);
  background: var(--colour-bg);
  border: 1px solid var(--colour-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.card h3 {
  margin-bottom: var(--space-2);
}

.card p {
  color: var(--colour-text-muted);
  font-size: var(--text-sm);
}

.card-number {
  display: inline-block;
  margin-bottom: var(--space-4);
  padding: var(--space-1) var(--space-3);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--colour-teal);
  background: var(--colour-teal-tint);
  border-radius: var(--radius-pill);
}

@media (min-width: 40em) {
  .card-grid-4,
  .card-grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 64em) {
  .card-grid-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .card-grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* Boundary statement */
.boundary-note {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  margin-top: var(--space-6);
  padding: var(--space-5);
  background: var(--colour-teal-tint);
  border: 1px solid #BFE0DB;
  border-left: 4px solid var(--colour-teal);
  border-radius: var(--radius);
}

.boundary-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  margin-top: 2px;
  color: var(--colour-teal);
}

.boundary-note p {
  margin: 0;
  font-weight: 600;
  color: var(--colour-navy);
}

/* --------------------------------------------------------------------------
   How it works
   -------------------------------------------------------------------------- */

.progression {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  font-weight: 700;
  color: var(--colour-navy);
}

.progression .arrow {
  color: var(--colour-teal);
}

.steps {
  list-style: none;
  display: grid;
  gap: 0;
}

.step {
  position: relative;
  display: flex;
  gap: var(--space-4);
  padding-bottom: var(--space-5);
}

.step:last-child {
  padding-bottom: 0;
}

.step::before {
  content: "";
  position: absolute;
  top: 2.75rem;
  bottom: 0.25rem;
  left: 1.25rem;
  width: 2px;
  margin-left: -1px;
  background: var(--colour-border-strong);
}

.step:last-child::before {
  display: none;
}

.step-marker {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  font-weight: 700;
  color: var(--colour-on-dark);
  background: var(--colour-navy);
  border-radius: 50%;
  position: relative;
  z-index: 1;
}

.step-body {
  flex: 1;
  min-width: 0;
  padding: var(--space-4) var(--space-5);
  background: var(--colour-bg);
  border: 1px solid var(--colour-border);
  border-radius: var(--radius);
}

.step-body h3 {
  margin-bottom: var(--space-2);
}

.step-body p {
  color: var(--colour-text-muted);
  font-size: var(--text-sm);
}

@media (min-width: 64em) {
  .steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .step {
    flex-direction: column;
    padding-bottom: 0;
  }

  .step::before {
    top: 1.25rem;
    bottom: auto;
    left: 2.75rem;
    right: calc(-1 * var(--space-4));
    width: auto;
    height: 2px;
    margin: -1px 0 0;
  }

  .step-body {
    height: 100%;
  }
}

/* --------------------------------------------------------------------------
   Vision
   -------------------------------------------------------------------------- */

.status-tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--colour-navy);
  background: var(--colour-bg);
  border: 1px dashed var(--colour-border-strong);
  border-radius: var(--radius-pill);
}

.card-vision {
  border-top: 3px solid var(--colour-teal);
}

.tick-list {
  list-style: none;
  display: grid;
  gap: var(--space-2);
}

.tick-list li {
  position: relative;
  padding-left: var(--space-5);
  color: var(--colour-text);
}

.tick-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 0.55rem;
  height: 0.55rem;
  border: 2px solid var(--colour-teal);
  border-radius: 50%;
}

/* --------------------------------------------------------------------------
   Progress
   -------------------------------------------------------------------------- */

.progress-grid {
  display: grid;
  gap: var(--space-7);
  align-items: start;
}

.milestones {
  list-style: none;
  display: grid;
  gap: var(--space-3);
}

.milestone {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: var(--space-4);
  align-items: center;
  padding: var(--space-4) var(--space-5);
  background: var(--colour-bg);
  border: 1px solid var(--colour-border);
  border-radius: var(--radius);
}

.milestone-dot {
  grid-row: span 2;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  border: 2px solid var(--colour-border-strong);
  background: var(--colour-bg);
}

.milestone-title {
  font-weight: 600;
  color: var(--colour-navy);
}

.milestone-status {
  font-size: 0.875rem;
  color: var(--colour-text-muted);
}

.milestone.is-done .milestone-dot {
  background: var(--colour-navy);
  border-color: var(--colour-navy);
}

.milestone.is-current {
  border-color: var(--colour-teal);
  background: var(--colour-teal-tint);
}

.milestone.is-current .milestone-dot {
  border-color: var(--colour-teal);
  background: radial-gradient(circle, var(--colour-teal) 0 40%, var(--colour-bg) 45%);
}

.milestone.is-current .milestone-status {
  color: var(--colour-teal-dark);
  font-weight: 600;
}

@media (min-width: 56em) {
  .progress-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--space-8);
  }
}

/* --------------------------------------------------------------------------
   Contact
   -------------------------------------------------------------------------- */

.section-contact {
  background: var(--colour-navy);
  color: var(--colour-on-dark-muted);
}

.contact-inner {
  text-align: center;
}

.contact-inner p {
  margin-inline: auto;
}

.section-contact h2 {
  color: var(--colour-on-dark);
}

.contact-email {
  margin-top: var(--space-5);
  font-weight: 600;
}

.contact-email a {
  color: var(--colour-on-dark);
  overflow-wrap: anywhere;
}

.contact-email a:hover {
  color: var(--colour-teal-bright);
}

.section-contact :focus-visible {
  outline-color: var(--colour-teal-bright);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.site-footer {
  padding-block: var(--space-7) var(--space-5);
  background: var(--colour-bg-tint);
  border-top: 1px solid var(--colour-border);
  font-size: var(--text-sm);
}

.footer-grid {
  display: grid;
  gap: var(--space-6);
}

.footer-brand img {
  width: 120px;
  height: 28px;
  margin-bottom: var(--space-4);
}

.footer-notice {
  color: var(--colour-text-muted);
  max-width: 60ch;
}

.footer-nav ul {
  list-style: none;
  display: grid;
  gap: var(--space-2);
}

.footer-nav a {
  color: var(--colour-navy);
  font-weight: 500;
}

.footer-base {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--colour-border);
  color: var(--colour-text-muted);
}

@media (min-width: 48em) {
  .footer-grid {
    grid-template-columns: 2fr 1fr;
    gap: var(--space-8);
  }

  .footer-nav ul {
    justify-items: end;
  }
}

/* --------------------------------------------------------------------------
   Privacy page
   -------------------------------------------------------------------------- */

.page-header {
  padding-block: var(--space-7) var(--space-5);
  border-bottom: 1px solid var(--colour-border);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
  font-weight: 600;
}

.last-updated {
  color: var(--colour-text-muted);
  font-size: var(--text-sm);
}

.prose {
  padding-block: var(--space-6) var(--space-8);
}

.prose h2 {
  font-size: 1.375rem;
  margin-top: var(--space-6);
}

.prose ul {
  margin: 0 0 var(--space-4);
  padding-left: var(--space-5);
}

.prose li {
  margin-bottom: var(--space-2);
  max-width: 64ch;
}

.prose .boundary-note {
  margin-top: var(--space-6);
}

/* --------------------------------------------------------------------------
   Reduced motion
   -------------------------------------------------------------------------- */

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

/* --------------------------------------------------------------------------
   Print
   -------------------------------------------------------------------------- */

@media print {
  .skip-link,
  .nav-toggle,
  .site-nav,
  .hero-visual,
  .button-row {
    display: none !important;
  }

  .site-header {
    position: static;
    box-shadow: none;
    border: 0;
  }

  body {
    font-size: 11pt;
    color: #000;
  }

  .section,
  .hero {
    padding-block: 1.5rem;
  }

  .section-tinted,
  .section-contact,
  .site-footer {
    background: none;
    color: #000;
  }

  .section-contact h2,
  .contact-email a {
    color: #000;
  }

  .card,
  .step-body,
  .milestone,
  .boundary-note {
    box-shadow: none;
    break-inside: avoid;
  }
}