/* =========================================================================
   RCSN — Road Collision Support Network
   Global stylesheet: design tokens, reset, header, nav, footer, components.

   Aesthetic direction: editorial / refined / trustworthy.
   For people in difficult moments — calm, clear, and never loud.
   ========================================================================= */


/* ---------- 1. Design tokens (CSS custom properties) -------------------- */

:root {
  /* Brand colours */
  --rcsn-navy:        #131d46;   /* primary text, headings, buttons       */
  --rcsn-blue:        #27aae1;   /* accent, links, hover, decoration      */
  --rcsn-navy-deep:   #0c1330;   /* pressed states, footer background     */
  --rcsn-blue-soft:   #e8f4fb;   /* very soft accent surfaces             */

  /* Surfaces */
  --rcsn-bg:          #f7f9fc;   /* page background                       */
  --rcsn-surface:     #ffffff;   /* cards, sections, header               */
  --rcsn-border:      #e3e8f0;   /* soft borders + rules                  */

  /* Text */
  --rcsn-text:        #1a2236;   /* body text on light surfaces           */
  --rcsn-text-muted:  #5a6478;   /* secondary, captions, footer body      */
  --rcsn-text-light:  #ffffff;   /* text on navy                          */

  /* Type — Plus Jakarta Sans used throughout, weight does the work */
  --rcsn-font-display: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --rcsn-font-body:    "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;

  /* Scale (a modest type scale; nothing shouty) */
  --rcsn-fs-300: 0.875rem;
  --rcsn-fs-400: 1rem;
  --rcsn-fs-500: 1.125rem;
  --rcsn-fs-600: 1.375rem;
  --rcsn-fs-700: 1.75rem;
  --rcsn-fs-800: 2.25rem;
  --rcsn-fs-900: clamp(2.5rem, 4.5vw + 1rem, 3.75rem);

  /* Spacing rhythm */
  --rcsn-space-1: 0.5rem;
  --rcsn-space-2: 1rem;
  --rcsn-space-3: 1.5rem;
  --rcsn-space-4: 2rem;
  --rcsn-space-5: 3rem;
  --rcsn-space-6: 4.5rem;
  --rcsn-space-7: 6rem;

  /* Layout */
  --rcsn-content-max: 1100px;
  --rcsn-wide-max:    1280px;

  /* Other */
  --rcsn-radius-sm: 6px;
  --rcsn-radius:    10px;
  --rcsn-radius-lg: 18px;
  --rcsn-shadow:    0 1px 2px rgba(19, 29, 70, 0.04), 0 6px 24px rgba(19, 29, 70, 0.08);
  --rcsn-shadow-lg: 0 2px 4px rgba(19, 29, 70, 0.06), 0 24px 48px rgba(19, 29, 70, 0.12);
  --rcsn-transition: 220ms cubic-bezier(0.4, 0.0, 0.2, 1);

  /* Container side padding - scales by breakpoint */
  --rcsn-gutter:   20px;
}


/* Tablet: 769px – 1023px */
@media (min-width: 769px) {
  :root {
    --rcsn-gutter:   32px;
  }
}


/* Desktop: 1024px+ */
@media (min-width: 1024px) {
  :root {
    --rcsn-gutter:   40px;
  }
}


/* Mobile-only type scale adjustments for legibility */
@media (max-width: 768px) {
  :root {
    /* Body stays at 16px (1rem); larger sizes scale down slightly so
       headings don't tower over phone screens */
    --rcsn-fs-500: 1.0625rem;   /* 17px - down from 18px */
    --rcsn-fs-600: 1.25rem;     /* 20px - down from 22px */
    --rcsn-fs-700: 1.5rem;      /* 24px - down from 28px */
    --rcsn-fs-800: 1.75rem;     /* 28px - down from 36px */
    --rcsn-fs-900: 2rem;        /* 32px - was clamp; lock it for mobile */

    /* Compress vertical rhythm slightly on small screens */
    --rcsn-space-5: 2.25rem;    /* was 3rem    */
    --rcsn-space-6: 3rem;       /* was 4.5rem  */
    --rcsn-space-7: 4rem;       /* was 6rem    */
  }
}


/* ---------- 2. Reset + base ---------------------------------------------- */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--rcsn-bg);
  color: var(--rcsn-text);
  font-family: var(--rcsn-font-body);
  font-size: var(--rcsn-fs-400);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;     /* safety net against any rogue wide element */
}

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

h1, h2, h3, h4 {
  font-family: var(--rcsn-font-display);
  color: var(--rcsn-navy);
  line-height: 1.18;
  font-weight: 700;
  margin: 0 0 var(--rcsn-space-3);
  letter-spacing: -0.02em;
}

h1 { font-size: var(--rcsn-fs-900); font-weight: 800; letter-spacing: -0.03em; }
h2 { font-size: var(--rcsn-fs-800); }
h3 { font-size: var(--rcsn-fs-700); }
h4 { font-size: var(--rcsn-fs-600); }

p {
  margin: 0 0 var(--rcsn-space-3);
}

a {
  color: var(--rcsn-navy);
  text-decoration: underline;
  text-decoration-color: var(--rcsn-blue);
  text-underline-offset: 3px;
  text-decoration-thickness: 2px;
  transition: color var(--rcsn-transition), text-decoration-color var(--rcsn-transition);
}

a:hover,
a:focus-visible {
  color: var(--rcsn-blue);
  text-decoration-color: currentColor;
}

:focus-visible {
  outline: 3px solid var(--rcsn-blue);
  outline-offset: 3px;
  border-radius: var(--rcsn-radius-sm);
}

ul, ol {
  padding-left: 1.25rem;
}

li + li {
  margin-top: var(--rcsn-space-1);
}


/* ---------- 3. Layout primitives ---------------------------------------- */

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

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


/* ---------- 4. Accessibility: skip link --------------------------------- */

.rcsn-skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--rcsn-navy);
  color: var(--rcsn-text-light);
  padding: var(--rcsn-space-2) var(--rcsn-space-3);
  z-index: 200;
  text-decoration: none;
  font-weight: 500;
}

.rcsn-skip-link:focus {
  left: var(--rcsn-space-2);
  top: var(--rcsn-space-2);
}


/* ---------- 5. Header + primary navigation ------------------------------ */

.rcsn-site-header {
  background: var(--rcsn-surface);
  border-bottom: 1px solid var(--rcsn-border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: saturate(180%) blur(8px);
}

.rcsn-site-header__inner {
  width: 100%;
  max-width: var(--rcsn-wide-max);
  margin-inline: auto;
  padding: var(--rcsn-space-2) var(--rcsn-gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--rcsn-space-3);
}

.rcsn-site-header__brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
  margin-right: auto;
}

.rcsn-site-header__logo {
  height: 44px;
  width: auto;
  border-radius: var(--rcsn-radius-sm);
}

@media (min-width: 1024px) {
  .rcsn-site-header__logo {
    height: 56px;
  }
}

.rcsn-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(var(--rcsn-space-3), 2.5vw, var(--rcsn-space-5));
  list-style: none;
  margin: 0;
  padding: 0;
}

.rcsn-nav__list li + li {
  margin-top: 0;
}

.rcsn-nav__link {
  font-family: var(--rcsn-font-body);
  font-size: var(--rcsn-fs-400);
  font-weight: 500;
  color: var(--rcsn-text);
  text-decoration: none;
  padding-block: 0.4rem;
  position: relative;
  transition: color var(--rcsn-transition);
}

.rcsn-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--rcsn-blue);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--rcsn-transition);
}

.rcsn-nav__link:hover,
.rcsn-nav__link:focus-visible {
  color: var(--rcsn-navy);
}

.rcsn-nav__link:hover::after,
.rcsn-nav__link:focus-visible::after,
.rcsn-nav__link--active::after {
  transform: scaleX(1);
}

.rcsn-nav__link--cta {
  background: var(--rcsn-navy);
  color: var(--rcsn-text-light);
  padding: 0.6rem 1.1rem;
  border-radius: 999px;
  transition: background var(--rcsn-transition), color var(--rcsn-transition), transform var(--rcsn-transition);
}

.rcsn-nav__link--cta::after { display: none; }

.rcsn-nav__link--cta:hover,
.rcsn-nav__link--cta:focus-visible {
  background: var(--rcsn-blue);
  color: var(--rcsn-text-light);
  transform: translateY(-1px);
}


/* Desktop nav is hidden by default; shown at desktop breakpoint below */
.rcsn-nav { display: none; }

/* Mobile menu trigger button (default visible until desktop kicks in) */
.rcsn-mnav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: 1px solid var(--rcsn-border);
  border-radius: var(--rcsn-radius-sm);
  padding: 0;
  cursor: pointer;
  width: 48px;
  height: 48px;
  flex-direction: column;
  gap: 6px;
  flex-shrink: 0;
  transition: border-color var(--rcsn-transition), background var(--rcsn-transition);
}

.rcsn-mnav-toggle:hover,
.rcsn-mnav-toggle:focus-visible {
  border-color: var(--rcsn-blue);
  background: var(--rcsn-blue-soft);
}

.rcsn-mnav-toggle__bar {
  display: block;
  height: 2px;
  width: 22px;
  background: var(--rcsn-navy);
  border-radius: 2px;
}


/* ---------- Desktop breakpoint: show horizontal nav, hide hamburger ---- */

@media (min-width: 1024px) {
  .rcsn-nav { display: block; }
  .rcsn-mnav-toggle { display: none; }
}


/* ---------- 5b. Mobile nav drawer (slide-out, full-screen) -------------- */

/* Lock body scroll when drawer is open */
html.rcsn-mnav-open,
body.rcsn-mnav-open {
  overflow: hidden;
  height: 100%;
}

.rcsn-mnav {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(800px 500px at 100% 0%, rgba(39, 170, 225, 0.12), transparent 60%),
    linear-gradient(180deg, var(--rcsn-navy) 0%, var(--rcsn-navy-deep) 100%);
  color: var(--rcsn-text-light);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  opacity: 0;
  visibility: hidden;
  /* Closing: slide out + fade, then flip visibility off after the slide finishes */
  transition:
    transform 320ms cubic-bezier(0.4, 0.0, 0.2, 1),
    opacity 240ms cubic-bezier(0.4, 0.0, 0.2, 1),
    visibility 0s linear 320ms;
  overscroll-behavior: contain;
}

.rcsn-mnav.is-open {
  transform: translateX(0);
  opacity: 1;
  visibility: visible;
  /* Opening: snap visibility on immediately so the slide and fade can play */
  transition:
    transform 320ms cubic-bezier(0.4, 0.0, 0.2, 1),
    opacity 200ms cubic-bezier(0.4, 0.0, 0.2, 1),
    visibility 0s linear 0s;
}

.rcsn-mnav__header {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--rcsn-space-2) var(--rcsn-gutter);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.rcsn-mnav__brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.rcsn-mnav__logo {
  height: 40px;
  width: auto;
  border-radius: var(--rcsn-radius-sm);
}

.rcsn-mnav__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--rcsn-text-light);
  border-radius: var(--rcsn-radius-sm);
  width: 40px;
  height: 40px;
  font-size: 1rem;
  cursor: pointer;
  transition: background var(--rcsn-transition), border-color var(--rcsn-transition);
}

.rcsn-mnav__close:hover,
.rcsn-mnav__close:focus-visible {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--rcsn-blue);
  outline: none;
}

.rcsn-mnav__body {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding-block: var(--rcsn-space-2);
  display: flex;
  flex-direction: column;
}

.rcsn-mnav__list {
  list-style: none;
  margin: 0;
  padding: 0 var(--rcsn-gutter);
  display: flex;
  flex-direction: column;
}

.rcsn-mnav__list li + li {
  margin-top: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.rcsn-mnav__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--rcsn-space-2);
  padding: 0.85rem 0.25rem;
  font-family: var(--rcsn-font-body);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0;
  color: rgba(255, 255, 255, 0.92);
  text-decoration: none;
  transition: color var(--rcsn-transition), padding-left var(--rcsn-transition);
}

.rcsn-mnav__link i {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.3);
  transition: transform var(--rcsn-transition), color var(--rcsn-transition);
}

.rcsn-mnav__link:hover,
.rcsn-mnav__link:focus-visible {
  color: var(--rcsn-blue);
  padding-left: 0.5rem;
  outline: none;
}

.rcsn-mnav__link:hover i,
.rcsn-mnav__link:focus-visible i {
  color: var(--rcsn-blue);
  transform: translateX(3px);
}

.rcsn-mnav__link--active {
  color: var(--rcsn-blue);
  font-weight: 600;
}

.rcsn-mnav__link--active i {
  color: var(--rcsn-blue);
}

.rcsn-mnav__contact {
  margin-top: auto;
  padding: var(--rcsn-space-3) var(--rcsn-gutter);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.rcsn-mnav__contact-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--rcsn-blue);
  margin: 0 0 var(--rcsn-space-1);
}

.rcsn-mnav__contact-link {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--rcsn-text-light);
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  word-break: break-all;
  transition: color var(--rcsn-transition);
  padding-block: 0.35rem;
}

.rcsn-mnav__contact-link i {
  color: var(--rcsn-blue);
  flex-shrink: 0;
  font-size: 0.9rem;
}

.rcsn-mnav__contact-link:hover,
.rcsn-mnav__contact-link:focus-visible {
  color: var(--rcsn-blue);
}


/* Hide the mobile drawer entirely at desktop breakpoint */
@media (min-width: 1024px) {
  .rcsn-mnav { display: none; }
}


/* ---------- 6. Buttons --------------------------------------------------- */

.rcsn-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-family: var(--rcsn-font-body);
  font-weight: 500;
  font-size: var(--rcsn-fs-400);
  text-decoration: none;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--rcsn-transition), color var(--rcsn-transition), border-color var(--rcsn-transition), transform var(--rcsn-transition);
  line-height: 1.2;
  min-height: 48px;       /* WCAG-comfortable touch target */
  text-align: center;
  white-space: nowrap;    /* keep label tight on desktop */
}

.rcsn-btn i {
  flex-shrink: 0;
  font-size: 0.95em;
  line-height: 1;
}

/* On mobile, let buttons wrap label naturally and allow them to fill space
   when grouped (e.g. side-by-side CTAs). */
@media (max-width: 768px) {
  .rcsn-btn {
    white-space: normal;
    padding: 0.9rem 1.35rem;
    font-size: var(--rcsn-fs-400);
  }
}

.rcsn-btn--primary {
  background: var(--rcsn-navy);
  color: var(--rcsn-text-light);
}

.rcsn-btn--primary:hover,
.rcsn-btn--primary:focus-visible {
  background: var(--rcsn-blue);
  color: var(--rcsn-text-light);
  transform: translateY(-1px);
}

.rcsn-btn--ghost {
  background: transparent;
  color: var(--rcsn-navy);
  border-color: var(--rcsn-navy);
}

.rcsn-btn--ghost:hover,
.rcsn-btn--ghost:focus-visible {
  background: var(--rcsn-navy);
  color: var(--rcsn-text-light);
  transform: translateY(-1px);
}

.rcsn-btn__arrow {
  transition: transform var(--rcsn-transition);
}

.rcsn-btn:hover .rcsn-btn__arrow,
.rcsn-btn:focus-visible .rcsn-btn__arrow {
  transform: translateX(3px);
}


/* ---------- 7. Shared components ---------------------------------------- */

/* Eyebrow label (small uppercase tag above headings) */
.rcsn-eyebrow {
  display: inline-block;
  font-family: var(--rcsn-font-body);
  font-size: var(--rcsn-fs-300);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--rcsn-blue);
  margin-bottom: var(--rcsn-space-2);
}

/* Lede paragraph - larger intro text */
.rcsn-lede {
  font-size: var(--rcsn-fs-500);
  color: var(--rcsn-text-muted);
  max-width: 65ch;
  line-height: 1.7;
}


/* ---------- 8. Footer --------------------------------------------------- */

.rcsn-site-footer {
  background: var(--rcsn-navy-deep);
  color: var(--rcsn-text-light);
  border-top: 4px solid var(--rcsn-blue);
}

.rcsn-site-footer__inner {
  width: 100%;
  max-width: var(--rcsn-wide-max);
  margin-inline: auto;
  padding: var(--rcsn-space-6) var(--rcsn-gutter) var(--rcsn-space-4);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--rcsn-space-4);
}

@media (min-width: 769px) {
  .rcsn-site-footer__inner {
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: var(--rcsn-space-5);
  }
}

@media (min-width: 1024px) {
  .rcsn-site-footer__inner {
    gap: var(--rcsn-space-6);
  }
}

.rcsn-site-footer__col {
  min-width: 0;
}

.rcsn-site-footer__brand-name {
  font-family: var(--rcsn-font-display);
  font-size: var(--rcsn-fs-600);
  color: var(--rcsn-text-light);
  margin: 0 0 var(--rcsn-space-2);
  letter-spacing: -0.01em;
}

.rcsn-site-footer__strapline {
  color: rgba(255, 255, 255, 0.75);
  max-width: 38ch;
  margin: 0;
}

.rcsn-site-footer__heading {
  font-family: var(--rcsn-font-body);
  font-size: var(--rcsn-fs-300);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--rcsn-blue);
  margin: 0 0 var(--rcsn-space-2);
}

.rcsn-site-footer__list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.rcsn-site-footer__list li + li {
  margin-top: 0.6rem;
}

.rcsn-site-footer__list a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  transition: color var(--rcsn-transition);
}

.rcsn-site-footer__list a:hover,
.rcsn-site-footer__list a:focus-visible {
  color: var(--rcsn-blue);
}

.rcsn-site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: var(--rcsn-space-3);
  text-align: center;
}

.rcsn-site-footer__bottom p {
  margin: 0;
  font-size: var(--rcsn-fs-300);
  color: rgba(255, 255, 255, 0.55);
}


/* ---------- 9. Motion: respect user preference --------------------------- */

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