/* ==========================================================================
   Shone Building Ltd - Stylesheet
   Replicating original dark/red theme with clean modern code
   ========================================================================== */

/* ==========================================================================
   1. Custom Properties (Design Tokens)
   ========================================================================== */

:root {
  --color-primary: #cc0000;
  --color-secondary: #1a1a1a;
  --color-accent: #ff3333;
  --color-text: #e0e0e0;
  --color-text-light: #ffffff;
  --color-background: #0a0a0a;
  --color-surface: #1a1a1a;
  --color-nav-bg: linear-gradient(to bottom, #660000, #330000);
  --color-border: #333333;
  --color-text-muted: #999999;

  --font-family-base: Georgia, "Times New Roman", serif;
  --font-family-heading: Georgia, "Times New Roman", serif;
  --font-size-base: 0.875rem;
  --line-height-base: 1.7;

  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;

  --container-max-width: 62rem;
  --container-padding: 1.5rem;
}

/* ==========================================================================
   2. Reset / Base
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-background);
  background-image: url('../images/bg-texture.jpg');
  background-repeat: repeat;
  min-height: 100vh;
  overflow-x: hidden;
}

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

a {
  color: var(--color-text);
  text-decoration: underline;
}

a:hover,
a:focus {
  color: var(--color-text-light);
}

ul,
ol {
  list-style: none;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

iframe {
  border: 0;
}

/* ==========================================================================
   3. Typography
   ========================================================================== */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-family-heading);
  font-weight: normal;
  line-height: 1.3;
  color: var(--color-text-light);
}

h1 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

h2 {
  font-size: 1.125rem;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

h3 {
  font-size: 1rem;
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-md);
}

/* ==========================================================================
   4. Layout (Container, Grid)
   ========================================================================== */

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

/* ==========================================================================
   5. Header & Logo
   ========================================================================== */

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--spacing-md);
  z-index: 1000;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-primary);
  color: var(--color-text-light);
  font-weight: bold;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.site-header {
  text-align: center;
  padding: var(--spacing-lg) var(--container-padding) 0;
}

.site-header .logo {
  display: inline-block;
  text-decoration: none;
}

.site-header .logo img {
  margin: 0 auto;
  max-width: 20rem;
  height: auto;
}

.site-header .tagline {
  color: var(--color-text);
  font-style: italic;
  font-size: 0.9rem;
  margin-top: var(--spacing-xs);
}

/* ==========================================================================
   6. Navigation
   ========================================================================== */

.site-nav-wrapper {
  background: var(--color-nav-bg);
  border-top: 2px solid var(--color-primary);
  border-bottom: 2px solid #1a0000;
  margin-top: var(--spacing-md);
}

#main-nav {
  display: none;
}

.nav-list {
  display: flex;
  justify-content: center;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list > li {
  position: relative;
}

.nav-list > li > a {
  display: block;
  padding: 0.75rem 1.5rem;
  color: var(--color-text-light);
  text-decoration: none;
  text-transform: uppercase;
  font-size: 0.8rem;
  font-weight: bold;
  letter-spacing: 0.08em;
  transition: background-color 0.2s ease;
}

.nav-list > li > a:hover,
.nav-list > li > a:focus {
  background-color: rgba(255, 255, 255, 0.1);
}

.nav-list a[aria-current="page"] {
  background-color: rgba(204, 0, 0, 0.4);
}

/* Submenu dropdowns */
.submenu {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 100;
  min-width: 12rem;
  background: #2a0000;
  border: 1px solid #440000;
  list-style: none;
  margin: 0;
  padding: var(--spacing-xs) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
  transition-delay: 0.3s;
}

.has-submenu:hover > .submenu,
.has-submenu:focus-within > .submenu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition-delay: 0s;
}

.submenu a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.8rem;
  text-transform: uppercase;
}

.submenu a:hover,
.submenu a:focus {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--color-text-light);
}

/* Mobile nav toggle */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  padding: var(--spacing-sm);
  margin: var(--spacing-sm) auto;
}

.nav-toggle__bar {
  display: block;
  width: 1.5rem;
  height: 2px;
  background-color: var(--color-text-light);
  border-radius: 1px;
}

/* Mobile nav open state */
#main-nav.is-open {
  display: block;
  padding: var(--spacing-sm) 0;
}

#main-nav.is-open .nav-list {
  flex-direction: column;
  align-items: stretch;
}

#main-nav.is-open .submenu {
  position: static;
  opacity: 1;
  visibility: visible;
  transform: none;
  transition: none;
  border: none;
  background: rgba(0, 0, 0, 0.3);
  display: none;
}

#main-nav.is-open .has-submenu.is-open > .submenu {
  display: block;
}

/* ==========================================================================
   7. Main Content Area
   ========================================================================== */

.content-area {
  background-color: rgba(20, 0, 0, 0.6);
  border: 1px solid #2a0000;
  border-radius: 4px;
  margin: var(--spacing-lg) auto;
  max-width: var(--container-max-width);
  padding: var(--spacing-lg);
}

main {
  padding-top: var(--spacing-md);
  padding-bottom: var(--spacing-xl);
}

/* Hero image - centred */
.hero {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.hero__image {
  max-width: 48rem;
  width: 100%;
  margin: 0 auto;
  border: 3px solid #333;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
}

/* Intro section */
.intro {
  margin-bottom: var(--spacing-lg);
}

.intro h1 {
  border-bottom: none;
  padding-bottom: 0;
}

.intro h1::before {
  content: "- ";
  color: var(--color-primary);
}

/* Accreditations - horizontal row */
.accreditations__logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
  margin-top: var(--spacing-md);
}

.accreditations__logos a {
  display: inline-block;
}

.accreditations__logos img {
  height: 4rem;
  width: auto;
  max-width: 8rem;
}

/* ==========================================================================
   8. Gallery
   ========================================================================== */

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-md);
}

.gallery-grid a {
  display: block;
  overflow: hidden;
  border: 2px solid #333;
  transition: border-color 0.2s ease;
}

.gallery-grid a:hover,
.gallery-grid a:focus {
  border-color: var(--color-primary);
  text-decoration: none;
}

.gallery-grid img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* ==========================================================================
   9. Lightbox
   ========================================================================== */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(0, 0, 0, 0.9);
  padding: var(--spacing-md);
}

.lightbox__image {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  display: block;
  border: 3px solid #333;
}

.lightbox__close,
.lightbox__prev,
.lightbox__next {
  position: absolute;
  background-color: rgba(0, 0, 0, 0.7);
  color: #fff;
  border: 1px solid #444;
  font-size: 2rem;
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.lightbox__close:hover,
.lightbox__close:focus,
.lightbox__prev:hover,
.lightbox__prev:focus,
.lightbox__next:hover,
.lightbox__next:focus {
  background-color: var(--color-primary);
}

.lightbox__close {
  top: var(--spacing-md);
  right: var(--spacing-md);
}

.lightbox__prev {
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
}

.lightbox__next {
  right: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
}

/* ==========================================================================
   10. Clients Grid
   ========================================================================== */

.clients-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.clients-grid img {
  height: 5rem;
  width: auto;
  max-width: 10rem;
  border: 2px solid #333;
}

/* ==========================================================================
   11. Contact / Address
   ========================================================================== */

.contact-address {
  font-style: normal;
  line-height: 1.8;
  margin-bottom: var(--spacing-lg);
}

.contact-address a {
  color: var(--color-text);
}

.contact-address a:hover {
  color: var(--color-text-light);
}

/* ==========================================================================
   12. Map Container
   ========================================================================== */

.map-container {
  width: 100%;
  margin-bottom: var(--spacing-lg);
}

.map-container iframe {
  width: 100%;
  height: 25rem;
  min-height: 15.625rem;
  display: block;
  border: 2px solid #333;
}

/* ==========================================================================
   13. Structure Image
   ========================================================================== */

.structure-img {
  width: 100%;
  max-width: 50rem;
  height: auto;
  display: block;
  margin: 0 auto var(--spacing-lg);
  border: 2px solid #333;
}

/* ==========================================================================
   14. Policy / Content Pages
   ========================================================================== */

main section ul,
main section ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

main section ul {
  list-style: disc;
}

main section ol {
  list-style: decimal;
}

main section li {
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-base);
}

/* ==========================================================================
   15. Footer
   ========================================================================== */

.site-footer {
  padding: var(--spacing-lg) var(--container-padding);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.8rem;
  border-top: 1px solid #222;
}

.site-footer p {
  margin-bottom: 0;
}

/* ==========================================================================
   16. Noscript Fallback
   ========================================================================== */

noscript #main-nav,
noscript .nav-list {
  display: block !important;
}

/* ==========================================================================
   17. Media Queries
   ========================================================================== */

@media (min-width: 30rem) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 48rem) {
  :root {
    --container-padding: 2rem;
  }

  #main-nav {
    display: block;
  }

  .nav-toggle {
    display: none;
  }

  .gallery-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  body {
    font-size: 0.875rem;
  }
}

@media (max-width: 47.99rem) {
  .nav-list > li > a {
    padding: 0.6rem 1rem;
    text-align: center;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .accreditations__logos {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .clients-grid {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  body {
    font-size: 1rem;
  }
}