/* ---------------------------------------------------------
   C4i Solutions – Accessible Base Styles
   ---------------------------------------------------------
   This stylesheet defines the core visual language for the
   C4i Solutions website. It uses a high‑contrast colour
   palette and typographic scale to meet WCAG 2.2 Level AA
   requirements while maintaining a modern, professional feel.
--------------------------------------------------------- */

/* ------------------------------
   CSS VARIABLES
------------------------------ */
:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f8f8f8;
  --color-bg-header: #0f2544;     /* deep navy */
  --color-bg-footer: #0f2544;
  --color-text: #111111;
  --color-text-muted: #555555;
  --color-border: #e2e2e2;
  --color-primary: #0053b3;       /* royal blue */
  --color-primary-dark: #003a80;
  --color-accent: #c99700;        /* gold */
  --color-error: #b00020;

  --font-base: "Inter", system-ui, -apple-system, BlinkMacSystemFont,
               "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --max-width: 72rem;

  --focus-outline: 3px solid var(--color-accent);
  --focus-outline-offset: 4px;

  --border-radius-sm: 4px;
  --border-radius-md: 6px;
  --border-radius-lg: 10px;

  --transition-fast: 0.15s ease-in-out;
}

/* ------------------------------
   GLOBAL RESET & BASE
------------------------------ */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-base);
  font-size: 18px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
}

img,
picture,
video,
canvas,
svg {
  max-width: 100%;
  height: auto;
}

img {
  display: block;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

p {
  margin-bottom: 1em;
}

ul,
ol {
  margin-top: 0;
  margin-bottom: 1em;
  padding-left: 1.5rem;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

/* ------------------------------
   TYPOGRAPHY
------------------------------ */
h1 {
  font-size: 2.5rem; /* ~40px */
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

h2 {
  font-size: 1.75rem; /* ~28px */
  line-height: 1.3;
  margin: 2.5rem 0 0.75rem;
}

h3 {
  font-size: 1.35rem; /* ~22px */
  line-height: 1.3;
  margin: 1.75rem 0 0.5rem;
}

h4 {
  font-size: 1.1rem;
  margin: 1.5rem 0 0.5rem;
}

.page-header {
  margin-bottom: 2.5rem;
}

.page-intro {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 44rem;
  color: white;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  clip: rect(0 0 0 0);
  overflow: hidden;
}

/* ------------------------------
   LINKS & FOCUS STATES
------------------------------ */
a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

a:hover {
  color: #ffffff;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[role="button"]:focus-visible {
  outline: var(--focus-outline);
  outline-offset: var(--focus-outline-offset);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0.5rem;
  padding: 0.5rem 0.75rem;
  background-color: var(--color-accent);
  color: #000;
  z-index: 1000;
  border-radius: var(--border-radius-sm);
}

.skip-link:focus-visible {
  left: 0.5rem;
}

/* ------------------------------
   HEADER & NAVIGATION
------------------------------ */
header {
  background-color: var(--color-bg-header);
  color: #ffffff;
}

header .branding {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  flex-direction: column;
}

header .branding a {
  color: #ffffff;
  text-decoration: none;
}

.site-name {
  font-weight: 600;
  font-size: 1.2rem;
}

.site-tagline {
  font-size: 0.95rem;
  color: #dbe4f7;
}

nav[aria-label="Primary"] {
  background-color: #10294f;
}

#primary-menu {
  list-style: none;
  margin: 0;
  padding: 0.5rem 1.25rem 0.75rem;
  max-width: var(--max-width);
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
}

#primary-menu li {
  margin: 0;
}

#primary-menu a {
  color: #ffffff;
  text-decoration: none;
  font-size: 0.95rem;
  padding: 0.4rem 0.3rem;
  border-radius: var(--border-radius-sm);
}

#primary-menu a:hover {
  background-color: var(--color-primary-dark);
}

#primary-menu a[aria-current="page"] {
  border-bottom: 2px solid var(--color-accent);
}

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid #ffffff;
  color: #ffffff;
  padding: 0.35rem 0.75rem;
  margin: 0.5rem 1.25rem;
  border-radius: var(--border-radius-sm);
  font-size: 0.95rem;
}

/* ------------------------------
   HERO & SECTIONS
------------------------------ */
.hero,
.page-hero-section {
  margin-top: 2.5rem;
  margin-bottom: 2.5rem;
}

.hero,
.page-hero-layout {
  display: grid;
  gap: 2rem;
}

.hero {
  grid-template-columns: minmax(0, 2fr) minmax(0, 1.5fr);
  align-items: center;
}

.page-hero-layout {
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1.3fr);
  align-items: center;
}

.hero-text,
.page-hero-text {
  max-width: 36rem;
}

.hero-image,
.page-hero-image {
  justify-self: center;
}

.hero-image img,
.page-hero-image img {
  border-radius: var(--border-radius-lg);
}

.hero-cta,
.cta-buttons {
  margin-top: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

section {
  margin-bottom: 3rem;
}

.service-grid,
.feature-list,
.help-options,
.contact-grid {
  display: grid;
  gap: 1.5rem;
}

.service-grid,
.feature-list,
.contact-grid {
  grid-template-columns: minmax(0, 1fr);
}

.service-grid article {
  padding: 1.25rem;
  background-color: var(--color-bg-alt);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-border);
}

.service-grid h3 {
  margin-bottom: 0.5rem;
}

.service-grid a {
  display: inline-block;
  margin-top: 0.75rem;
  font-weight: 600;
}

.business-signpost {
  background: linear-gradient(135deg, #0f2544, #003a80);
  color: #ffffff;
  padding: 2rem;
  border-radius: var(--border-radius-lg);
}

.business-signpost a {
  color: #ffffff;
  text-decoration-color: var(--color-accent);
  font-weight: 600;
}

.cta-section {
  background-color: var(--color-primary);
  color: #ffffff;
  text-align: center;
  padding: 2rem 1rem;
  border-radius: var(--border-radius-lg);
}

.cta-section .button {
  margin-top: 1rem;
}

/* ------------------------------
   BUTTONS
------------------------------ */
.button,
button,
input[type="submit"],
input[type="button"] {
  display: inline-block;
  background-color: var(--color-primary);
  color: #ffffff;
  border: none;
  border-radius: var(--border-radius-md);
  padding: 0.7rem 1.4rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  line-height: 1.2;
  min-width: 2.75rem;
  min-height: 2.75rem;
  transition: background-color var(--transition-fast),
              transform var(--transition-fast),
              box-shadow var(--transition-fast);
}

.button:hover,
button:hover,
input[type="submit"]:hover,
input[type="button"]:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

.button-secondary {
  background-color: #ffffff;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.button-secondary a:visited{
   color: var(--color-primary);
}

.button-secondary a:hover {
  color: var(--color-primary);
}

.button-secondary:hover {
  background-color: #e9f1ff;
}

/* ------------------------------
   FOOTER
------------------------------ */
footer {
  background-color: var(--color-bg-footer);
  color: #ffffff;
  padding: 2rem 1.25rem;
  margin-top: 3rem;
}

footer section {
  max-width: var(--max-width);
  margin: 0 auto 1.5rem;
}

footer h2 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

footer a {
  color: #ffffff;
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

footer a:hover {
  color: var(--color-accent);
}

.social-links {
  list-style: none;
  padding-left: 0;
  margin: 0.75rem 0;
}

.social-links li {
  display: inline-block;
  margin-right: 0.75rem;
}

/* ------------------------------
   RESPONSIVE
------------------------------ */
@media (max-width: 768px) {
  main {
    padding-inline: 1rem;
  }
  .hero,
  .page-hero-layout {
    grid-template-columns: minmax(0, 1fr);
  }
  .hero-image,
  .page-hero-image {
    order: -1;
  }
  .page-hero-section,
  .hero {
    margin-top: 1.75rem;
  }
  .menu-toggle {
    display: inline-block;
  }
  #primary-menu {
    flex-direction: column;
    gap: 0.25rem;
  }
}

@media (min-width: 769px) {
  .service-grid,
  .feature-list,
  .contact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}